"uuid","repository link","title","author","contributor","publication year","abstract","subject topic","language","publication type","publisher","isbn","issn","patent","patent status","bibliographic note","access restriction","embargo date","faculty","department","research group","programme","project","coordinates"
"uuid:a79712b3-9716-42bb-b01a-c657a7b34369","http://resolver.tudelft.nl/uuid:a79712b3-9716-42bb-b01a-c657a7b34369","How manoeuvre information via auditory (spatial and beep) and visual UI can enhance trust and acceptance in automated driving","Kim, S. (TU Delft Human Information Communication Design); van Egmond, R. (TU Delft Human Information Communication Design); Happee, R. (TU Delft Intelligent Vehicles)","","2024","In conditionally automated driving (SAE level 3), drivers may take their eyes off the road but will still need to be ready to take control and will, therefore, benefit from information on automation. This study aims to investigate the effectiveness of automation manoeuvre information provided through spatial sound, traditional notification sound (beep), and a visual interface. Spatial sounds were designed differentiating four distinct driving manoeuvres: overtaking a leading car, slowing down, turning right, and passing a roundabout. The notification sound consisted of one beep being identical for all manoeuvres. The visual interface showed the automation mode with an image and manoeuvre information with text and images. The impact of these interfaces on trust, workload, acceptance, situation awareness, and sense of control was evaluated with questionnaires and visual attention was evaluated with eye tracking while participants engaged in a visual-motor secondary task in a driving simulator. The results indicate that, with all interfaces tested, manoeuvre information enhances trust, acceptance, situation awareness, and sense of control, without significantly affecting the overall workload. These benefits were more profound, adding auditory information and differed marginally between the traditional notification and the spatial sound, as the effectiveness of the different auditory interface types varied depending on the specific manoeuvre. Findings highlight the importance of designing user interfaces for automation manoeuvre information using auditory cues to improve the user experience in automated driving.","Automated vehicles; Human-Machine Interaction; Trust; Acceptance; Sound design","en","journal article","","","","","","","","","","","Human Information Communication Design","","",""
"uuid:46f7dd57-fc54-415c-8793-a6696014963f","http://resolver.tudelft.nl/uuid:46f7dd57-fc54-415c-8793-a6696014963f","Full-length single-molecule protein fingerprinting","Filius, M. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); van Wee, R.G. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); de Lannoy, C.V. (TU Delft BN/Chirlmin Joo Lab; Wageningen University & Research; Kavli institute of nanoscience Delft); Westerlaken, I. (TU Delft BT/Industriele Microbiologie; Kavli institute of nanoscience Delft); Li, Zeshi (Kavli institute of nanoscience Delft); Kim, S.H. (TU Delft BN/Chirlmin Joo Lab; Ewha Womans University; Kavli institute of nanoscience Delft); de Agrela Pinto, C. (TU Delft BN/Arjen Jakobi Lab; Kavli institute of nanoscience Delft); Wu, Yunfei (Universiteit Utrecht); Boons, Geert-Jan (Universiteit Utrecht); Pabst, Martin (TU Delft BT/Environmental Biotechnology); de Ridder, Dick (Wageningen University & Research); Joo, C. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft)","","2024","Proteins are the primary functional actors of the cell. While proteoform diversity is known to be highly biologically relevant, current protein analysis methods are of limited use for distinguishing proteoforms. Mass spectrometric methods, in particular, often provide only ambiguous information on post-translational modification sites, and sequences of co-existing modifications may not be resolved. Here we demonstrate fluorescence resonance energy transfer (FRET)-based single-molecule protein fingerprinting to map the location of individual amino acids and post-translational modifications within single full-length protein molecules. Our data show that both intrinsically disordered proteins and folded globular proteins can be fingerprinted with a subnanometer resolution, achieved by probing the amino acids one by one using single-molecule FRET via DNA exchange. This capability was demonstrated through the analysis of alpha-synuclein, an intrinsically disordered protein, by accurately quantifying isoforms in mixtures using a machine learning classifier, and by determining the locations of two O-GlcNAc moieties. Furthermore, we demonstrate fingerprinting of the globular proteins Bcl-2-like protein 1, procalcitonin and S100A9. We anticipate that our ability to perform proteoform identification with the ultimate sensitivity may unlock exciting new venues in proteomics research and biomarker-based diagnosis","","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2024-08-13","","","BN/Chirlmin Joo Lab","","",""
"uuid:916e8ee4-3025-4cb7-b80b-6e14f6b6a1ae","http://resolver.tudelft.nl/uuid:916e8ee4-3025-4cb7-b80b-6e14f6b6a1ae","The effect of micromechanical stresses on vacancy formation and stress-driven mass-transport in polycrystalline Fe–Au alloy","Hussein, Abdelrahman (Universiteit Gent; Korea University); van der Zwaag, S. (TU Delft Group Garcia Espallargas); Kim, Byungki (Korea University)","","2024","In recent years, a new class of super saturated binary and ternary alloys have demonstrated the ability for the self-healing of creep-induced voids formed at the grain boundaries. However, a clear understanding of the parameters affecting the self-healing mechanism is still not yet complete. One of the main challenges is understanding the effect of microstructure and micromechanical stresses on the redistribution of the healing-solute and vacancies. To this end, we address this issue using a CALPHAD-informed diffusion model coupled with crystal plasticity. In principle, the approach is general and can be used for any binary Fe–X alloy, but in this work Fe–Au binary system is used since it experimentally showed the best healing efficiency. First, we present a multicomponent diffusion model considering cross and stress-driven diffusion. The effect of stress was also considered on the equilibrium vacancy concentration. To investigate the effect of the micromechanical stresses, a representative volume element (RVE) was obtained using the phase-field method. The results showed that the maximum vacancy concentration is at the grain boundaries (GBs) with the highest hydrostatic tensile stresses. These were also the regions of the highest Au enrichment. A crucial factor to achieve this is the high diffusivity of Au compared to the Fe matrix. Increasing the stresses, lead to an increase both in vacancy and Au concentration. The accompanying increased stress triaxiality is suggested to be the reason for the reduced self-healing efficiency observed in previous experimental studies.","CALPHAD; Creep-voids; Cross diffusion; Crystal plasticity; Self-healing; Vacancies","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2024-09-01","","","Group Garcia Espallargas","","",""
"uuid:c13dd1e6-1704-4f5b-9b45-95de34eb7ef2","http://resolver.tudelft.nl/uuid:c13dd1e6-1704-4f5b-9b45-95de34eb7ef2","Integrating simulation and measurement techniques to model outdoor noise and heat in airport neighbourhoods with varying urban geometries","Wuite, F.G.E. (TU Delft Environmental & Climate Design; TU Delft Amsterdam Institute for Advanced Metropolitan Solutions); Peng, Zhikai (TU Delft Environmental & Climate Design; TU Delft Amsterdam Institute for Advanced Metropolitan Solutions); Kim, K.J. (TU Delft Environmental & Climate Design); Lugten, M.C. (TU Delft Environmental & Climate Design; TU Delft Amsterdam Institute for Advanced Metropolitan Solutions); Tenpierik, M.J. (TU Delft Environmental & Climate Design)","","2024","This study aims to evaluate the impact of different urban building geometries (six courtyards, two canyons, two slabs) on heat mitigation and aircraft noise attenuation, in order to support an evidence-based retrofit plan for future airport neighborhoods. Using ’Pachyderm + ENVI-met simulations + field measurements’, we found that the slanted-roof, low-rise courtyard exhibited optimal acoustic-thermal performance (SPLmin = 71.1 dB(A), σU T CI < 5 ◦C), while the mid-rise canyon demonstrated limited performance (SPLmin = 93.4 dB(A), σU T CI > 10 ◦C). These findings were observed under averaged boundary conditions of a 140 dB(A) aircraft sound source and a diurnal MRT range of 60 ◦C on a heatwave day in July 2022.","noise and heat; parametric design; airport neighbourhood; courtyard; outdoor comfort","en","conference paper","IBPSA","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2024-09-13","","Amsterdam Institute for Advanced Metropolitan Solutions","Environmental & Climate Design","","",""
"uuid:ab0dbd40-96d3-4b7c-a6b8-f604c96b02f8","http://resolver.tudelft.nl/uuid:ab0dbd40-96d3-4b7c-a6b8-f604c96b02f8","Assessing the impact of building shape on aircraft noise attenuation: Comparison between geometrical acoustics simulation and in-situ measurements","Kim, K.J. (TU Delft Environmental & Climate Design); Lugten, M.C. (TU Delft Environmental & Climate Design; TU Delft Amsterdam Institute for Advanced Metropolitan Solutions); Wuite, F.G.E. (TU Delft Environmental & Climate Design; TU Delft Amsterdam Institute for Advanced Metropolitan Solutions); Peng, Zhikai (TU Delft Environmental & Climate Design; TU Delft Amsterdam Institute for Advanced Metropolitan Solutions); Tenpierik, M.J. (TU Delft Environmental & Climate Design)","","2024","Analyzing the impact of aircraft noise on urban areas requires specific consideration of sound propagation over long distances, which is not typically covered by tools designed for indoor acoustics. Although it is unclear to what extent existing parametric tools that combine 3D modeling and acoustic simulation can accurately replicate these spatial scales, they provide a valuable means of exploring design options and optimizing performance. One such tool, Pachyderm, a numerical model based on geometrical acoustics, was used to simulate a field lab near Schiphol Airport to assess its applicability for urban acoustics simulation. The simulation results were compared to in-situ measurements, with a focus on differentiating the effect of air noise attenuation based on varying building shapes and the accuracy of the resulting sound pressure level values. The most decisive factors in reducing noise in the courtyard were found to be the building’s orientation and slope relative to the sound source. However, as the design complexity increased with the addition of features such as shielding, the accuracy of the simulation results decreased.","outdoor acoustics; aircraft; building shape; simulation validation; noise attenuation","en","conference paper","IBPSA","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2024-09-13","","Amsterdam Institute for Advanced Metropolitan Solutions","Environmental & Climate Design","","",""
"uuid:1721cfd3-d50c-42c6-a62b-ab40af15e341","http://resolver.tudelft.nl/uuid:1721cfd3-d50c-42c6-a62b-ab40af15e341","On spatially correlated observations in importance sampling methods for subsidence estimation","Kim, S.S.R. (TU Delft Reservoir Engineering); Vossepoel, F.C. (TU Delft Reservoir Engineering)","","2024","The particle filter is a data assimilation method based on importance sampling for state and parameter estimation. We apply a particle filter in two different quasi-static experiments with models of subsidence caused by a compacting reservoir. The first model considers uncorrelated model state variables and observations, with observed subsidence resulting from a single source of strain. In the second model, subsidence is a summation of subsidence contributions from multiple sources which causes spatial dependencies and correlations in the observed subsidence field. Assimilating these correlated subsidence fields may trigger weight collapse. With synthetic tests, we show in a model of subsidence with 50 independent state variables and spatially correlated subsidence a minimum of 1013 particles are required to have information in the posterior distribution identical to that in a model with 50 independent and spatially uncorrelated observations. Spatial correlations cause an information loss which can be quantified with mutual information. We illustrate how a stronger spatial correlation results in lower information content in the posterior and we empirically derive the required ensemble size for the importance sampling to remain effective. We furthermore illustrate how this loss of information is reflected in the log likelihood, and how this depends on the number of model state variables. Based on these empirical results, we propose criteria to evaluate the required ensemble size in data assimilation of spatially correlated observation fields.","Ensemble size; Information theory; Particle method; Reservoir; Subsidence; Weight collapse","en","journal article","","","","","","","","","","","Reservoir Engineering","","",""
"uuid:dd163f10-70c5-4094-8e88-3ea6b754651c","http://resolver.tudelft.nl/uuid:dd163f10-70c5-4094-8e88-3ea6b754651c","ApHMM: Accelerating Profile Hidden Markov Models for Fast and Energy-efficient Genome Analysis","Firtina, Can (ETH Zürich); Pillai, Kamlesh (Intel Labs); Kalsi, Gurpreet S. (Intel Labs); Suresh, Bharathwaj (Intel Labs); Cali, Damla Senol (Carnegie Mellon University); Kim, Jeremie S. (ETH Zürich); Shahroodi, Taha (TU Delft Computer Engineering); Cavlak, Meryem Banu (ETH Zürich); Lindegger, Joël (ETH Zürich)","","2024","Profile hidden Markov models (pHMMs) are widely employed in various bioinformatics applications to identify similarities between biological sequences, such as DNA or protein sequences. In pHMMs, sequences are represented as graph structures, where states and edges capture modifications (i.e., insertions, deletions, and substitutions) by assigning probabilities to them. These probabilities are subsequently used to compute the similarity score between a sequence and a pHMM graph. The Baum-Welch algorithm, a prevalent and highly accurate method, utilizes these probabilities to optimize and compute similarity scores. Accurate computation of these probabilities is essential for the correct identification of sequence similarities. However, the Baum-Welch algorithm is computationally intensive, and existing solutions offer either software-only or hardware-only approaches with fixed pHMM designs. When we analyze state-of-the-art works, we identify an urgent need for a flexible, high-performance, and energy-efficient hardware-software co-design to address the major inefficiencies in the Baum-Welch algorithm for pHMMs. We introduce ApHMM, the first flexible acceleration framework designed to significantly reduce both computational and energy overheads associated with the Baum-Welch algorithm for pHMMs. ApHMM employs hardware-software co-design to tackle the major inefficiencies in the Baum-Welch algorithm by (1) designing flexible hardware to accommodate various pHMM designs, (2) exploiting predictable data dependency patterns through on-chip memory with memoization techniques, (3) rapidly filtering out unnecessary computations using a hardware-based filter, and (4) minimizing redundant computations. ApHMM achieves substantial speedups of 15.55×–260.03×, 1.83×–5.34×, and 27.97× when compared to CPU, GPU, and FPGA implementations of the Baum-Welch algorithm, respectively. ApHMM outperforms state-of-the-art CPU implementations in three key bioinformatics applications: (1) error correction, (2) protein family search, and (3) multiple sequence alignment, by 1.29×–59.94×, 1.03×–1.75×, and 1.03×–1.95×, respectively, while improving their energy efficiency by 64.24×–115.46×, 1.75×, and 1.96×.","Bioinformatics; genomics; profile hidden markov models; the Baum-Welch Algorithm","en","journal article","","","","","","","","","","","Computer Engineering","","",""
"uuid:1ad5a3ec-6216-4a4a-8963-333493f3f680","http://resolver.tudelft.nl/uuid:1ad5a3ec-6216-4a4a-8963-333493f3f680","Author Correction: Testing pseudotopological and nontopological models for SMC-driven DNA loop extrusion against roadblock-traversal experiments (Scientific Reports, (2023), 13, 1, (8100), 10.1038/s41598-023-35359-2)","Barth, R. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Pradhan, B. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Kim, E. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Davidson, Iain F. (Research Institute of Molecular Pathology, Vienna); van der Torre, J. (TU Delft BN/Cees Dekker Lab); Peters, Jan‑Michael ‑M (Research Institute of Molecular Pathology, Vienna); Dekker, C. (TU Delft BN/Cees Dekker Lab)","","2023","Correction to: Scientific Reports, published online 19 May 2023 The original version of this Article contained an error in Figure 1b-1, where the fore- and background order of the strands “DNA” (in black) and “Brn1 Kleisin” (in green), were switched. The original Figure 1 and accompanying legend appear below. (Figure presented.) Description of the mechanism postulated by Shaltiel et al. for roadblock passage into an extruded loop on the DNA and a potential nontopological model. (a) The steps through the proposed DNA loop extrusion cycle are commented in more detail in steps 1–6 within the figure. Adapted from Ref.11. (b) Potential nontopological model which is closely analogous to the pseudotopological model, but with a slight variation in the DNA-SMC topology which allows particle bypass. The original Article has been corrected.","","en","journal article","","","","","","author correction DOI 10.1038/s41598-023-35359-2","","","","","BN/Cees Dekker Lab","","",""
"uuid:0be72865-8064-4120-8103-c57b1321a3f0","http://resolver.tudelft.nl/uuid:0be72865-8064-4120-8103-c57b1321a3f0","Embedding design practices in local government: A case study analysis","Kim, A. (TU Delft Methodologie en Organisatie van Design)","Lloyd, P.A. (promotor); Mulder, I. (promotor); van der Bijl-Brouwer, M. (copromotor); Delft University of Technology (degree granting institution)","2023","Design approaches are increasingly being employed by governments worldwide to address public service and policy issues. This book explores the evolution of these design practices within the context of local government, shedding light on the value they can create and how they become stabilized in six local government organizations.","Design for policy; Local government; Public sector innovation; Design management","en","doctoral thesis","","978-94-6366-758-6","","","","","","","","","Methodologie en Organisatie van Design","","",""
"uuid:be007bb6-fcee-4814-87b4-d7a14b691547","http://resolver.tudelft.nl/uuid:be007bb6-fcee-4814-87b4-d7a14b691547","A Framework for Optimal Reservoir Operation to Improve Downstream Aquatic Environment: Application to Nakdong River Basin in South Korea","Kim, J. (TU Delft Water Resources)","Solomatine, D.P. (promotor); Jonoski, Andreja (promotor); Delft University of Technology (degree granting institution)","2023","In the water sector, issues concerning the aquatic environment have been extensively discussed due to climate change. In particular, water quality problems such as harmful cyanobacterial blooms (CyanoHABs) in rivers have arisen in South Korea since 2012. The Korean government constructed 16 weirs in the rivers during the Four Major Rivers Restoration Project. These weirs were built to more effectively use water resources in the rivers. Many environmental activists, however, have claimed that the weirs have caused water quality problems of CyanoHABs in the rivers. These CyanoHABs can be threats to the water environment while harming human health and aquatic ecosystems since CyanoHABs produce toxic substances such as microcystins.
To address the problems of these CyanoHABs, many researchers have conducted studies on predictive models for CyanoHABs. A predictive model using a data-driven approach can be useful in exploring the main factors affecting CyanoHABs at a specific location. However, these studies have not focused on preventing the occurrence of CyanoHABs but only on predicting their occurrence. If these studies are designed to link with a practical method for reducing the frequency of CyanoHABs, viable strategies can be proposed to effectively control CyanoHABs. Therefore, detailed considerations are required concerning the prevention or mitigation of CyanoHABs.
Reservoir operation can be a solution for reducing the problem of CyanoHABs in a downstream river. For example, discharging more water from upstream reservoirs can flush CyanoHABs downstream. However, the risk of water shortage can be increased in a reservoir if it is operated for improving water quality downstream. This is because reservoirs were typically designed for management of water quantity such as water supply. To use limited water resources in a reservoir to reduce the frequency of CyanoHABs downstream, optimal reservoir operations are necessary that simultaneously consider both the quantity and the quality of water.
This study focused on establishing a practical framework for the optimal operation of upstream reservoirs to address the problem of CyanoHABs in a downstream river. Furthermore, the applicability of this framework was demonstrated using observational data related to the quantity and quality of the upstream reservoirs in the study area, the Nakdong River basin of South Korea. The framework was established by incorporating three models: a machine learning model, a river water quality model, and an optimization model for reservoir operation.
Methods: We investigated the influence of a color themed HMI on the trust and take-over performance in automated vehicles. Using a driving simulator, we tested 45 participants divided in three groups with a baseline auditory HMI and two advanced color themed HMIs consisting of a display and ambient lighting with the colors red and blue. Trust in automation was assessed using questionnaires while take-over performance was assessed through response time and success rate.
Results: Compared to the baseline HMI, the color themed HMI is more trustworthy, and participants understood their driving tasks better. Results show that the color themed HMI is perceived as more pleasant compared to the baseline HMI and leads to shorter reaction times. Red ambient lighting is seen as more urging than blue, but HMI color did not significantly affect the general HMI perception and TOR performance.
Discussion: Further research can explore the use of color and other modalities to express varying urgency levels and validate findings in complex on road driving conditions.","take-over request; trust; automated driving; HMI; driving simulator","en","journal article","","","","","","","","","","","Intelligent Vehicles","","",""
"uuid:6f2f65b7-2744-4a81-9d54-dbb94a039946","http://resolver.tudelft.nl/uuid:6f2f65b7-2744-4a81-9d54-dbb94a039946","Identifying meaningful user experiences with autonomous products: a case study in fundamental user needs in fully autonomous vehicles","Gomez Beldarrain, G.; van der Maden, W.L.A. (TU Delft Design Aesthetics); Huang, S.; Kim, E.Y. (TU Delft Marketing and Consumer Research)","","2023","Autonomous products (e.g., home cleaning robots, smart fridges, or autonomous vehicles) take over tasks that require time and effort from their users, redefining both the user roles and context around a product. Consequently, meaningful user experiences should be designed to overcome the risk of relegating humans to undesirable tasks and to take the opportunity of employing users’ newly available time, in contexts such as highly automated vehicles. Meaningful experiences are provided when fundamental user needs (i.e., universal needs that directly contribute to our wellbeing) are fulfilled. Nevertheless, designers face challenges in anticipating and fulfilling user needs related to autonomous products, since autonomous technology continues evolving towards products that are not yet in existence. In this paper, we employ a co-creation workshop method to explore how the typology of thirteen fundamental needs can serve as a starting point to design meaningful user experiences associated with autonomous vehicles. Specifically, our goal is to understand how the typology of thirteen fundamental needs (e.g., autonomy, beauty, comfort...) could help in (1) identifying how deep user needs manifest themselves in a given context and (2) conceptualizing meaningful experiences with autonomous devices. In this aim, we elaborate on the challenge of designing meaningful non-driving- related experiences in fully autonomous vehicles, which could emerge in the future if driving tasks become obsolete. The results propose new clusters of activities and a scenario for each fundamental need, and ultimately show that engaging with the fundamental needs could be a valuable foundation for designing rich human interactions with future technologies.","meaningful user experiences; fundamental needs; Autonomous Vehicles; non-driving related tasks","en","conference paper","","","","","","","","","","","Design Aesthetics","","",""
"uuid:058270bc-d7ad-403e-94de-5b19563cf0fb","http://resolver.tudelft.nl/uuid:058270bc-d7ad-403e-94de-5b19563cf0fb","Decision Support Framework for Optimal Reservoir Operation to Mitigate Cyanobacterial Blooms in Rivers","Kim, J. (TU Delft Water Resources; IHE Delft Institute for Water Education; K-water); Jonoski, Andreja (IHE Delft Institute for Water Education); Solomatine, D.P. (TU Delft Water Resources; IHE Delft Institute for Water Education); Goethals, Peter L. M. (Universiteit Gent)","","2023","Flow control flushing water from reservoirs has been imposed in South Korea for mitigating harmful cyanobacterial blooms (CyanoHABs) in rivers. This measure, however, can cause water shortage in reservoirs, as the measure adopting this flow control may require an additional amount of water which exceeds the water demand allocated to the reservoirs. In terms of sustainability, a trade-off between improving water quality and alleviating water shortage needs to be considered. This study aimed at establishing a practical framework for a decision support system for optimal joint operation of the upstream reservoirs (Andong and Imha) to reduce the frequency of CyanoHABs in the Nakdong River, South Korea. Methodologically, three models were introduced: (1) a machine learning model (accuracy 88%) based on the k-NN (k-Nearest Neighbor) algorithm to predict the occurrence of CyanoHABs at a selected downstream location (the Chilgok Weir located approximately 140 km downstream from the Andong Dam), (2) a multiobjective optimization model employing NSGA-II (Nondominated Sorting Genetic Algorithm II) to determine both the quantity and quality of water released from the reservoirs, and (3) a river water quality model (R2 0.79) using HEC-RAS to simulate the water quality parameter at Chilgok Weir according to given upstream boundary conditions. The applicability of the framework was demonstrated by simulation results using observational data from 2015 to 2019. The simulation results based on the framework confirmed that the frequency of CyanoHABs would be decreased compared with the number of days when CyanoHABs were observed at Chilgok Weir. This framework, with a combination of several models, is a novelty in terms of efficiency, and it can be a part of a solution to the problem of CyanoHABs without using an additional amount of water from a reservoir.","harmful cyanobacterial blooms; reservoir operation; framework; machine learning model; river water quality model","en","journal article","","","","","","","","","","","Water Resources","","",""
"uuid:e817f585-fdbb-40c4-822c-afbe67aa5cf2","http://resolver.tudelft.nl/uuid:e817f585-fdbb-40c4-822c-afbe67aa5cf2","Assessment of interfacial turbulence treatment models for free surface flows","Zou, P. (TU Delft Rivers, Ports, Waterways and Dredging Engineering; University of Michigan); Kim, Taeksang (University of Michigan); Bricker, J.D. (TU Delft Hydraulic Structures and Flood Risk; University of Michigan); Uijttewaal, W.S.J. (TU Delft Environmental Fluid Mechanics)","","2023","The modelling of complex free surface flows is challenging due to the mobility and deformability of the interface and air entrainment characteristics, which are highly affected by turbulence. With the framework of Reynolds averaged Navier–Stokes (RANS) models and the volume of fluid (VOF) method, turbulence quantities at the air–water interface tend to be over-estimated. In this study, interfacial turbulence treatment methods including the buoyancy modification model based on the simple gradient diffusion hypothesis (SGDH) and Egorov’s turbulence damping model are investigated. Furthermore, due to the unconditionally unstable characteristics of the standard k-ε turbulence model, the stabilized k-ε turbulence model is applied as a comparison. The turbulence attenuation performance using different interfacial turbulence treatment methods in the vicinity of the interface is compared and discussed for stratified flows and free overflow weirs for aerated and non-aerated nappe scenarios. The turbulence quantities and free surface profile under different flow conditions are validated against experimental data and an analytical model. The results show that for free surface waves, both the SGDH model and the turbulence damping model give strong improvements in turbulence production compared with the standard k-ε model. The SGDH model augments the turbulence kinetic energy (TKE) in the unstable stratification, leading to unphysical behaviour for the partially dispersed and separated flow.","Air entrainment; buoyancy modification; CFD; free overflow weirs; free surface flows; turbulence damping","en","journal article","","","","","","","","","","","Rivers, Ports, Waterways and Dredging Engineering","","",""
"uuid:52ac12b5-5083-4396-9c78-faeee33c956d","http://resolver.tudelft.nl/uuid:52ac12b5-5083-4396-9c78-faeee33c956d","Graphene nano-electromechanical mass sensor with high resolution at room temperature","Shin, D. (TU Delft Dynamics of Micro and Nano Systems; Kavli institute of nanoscience Delft; Ewha Womans University); Kim, Hakseong (Korea Research Institute of Standards and Science, Daejon); Kim, S.H. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Cheong, Hyeonsik (Sogang University); Steeneken, P.G. (TU Delft Dynamics of Micro and Nano Systems; Kavli institute of nanoscience Delft); Joo, C. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft; Ewha Womans University); Lee, Sang Wook (Ewha Womans University)","","2023","The inherent properties of 2D materials—light mass, high out-of-plane flexibility, and large surface area—promise great potential for precise and accurate nanomechanical mass sensing, but their application is often hampered by surface contamination. Here we demonstrate a tri-layer graphene nanomechanical resonant mass sensor with sub-attogram resolution at room temperature, fabricated by a bottom-up process. We found that Joule-heating is effective in cleaning the graphene membrane surface, which results in a large improvement in the stability of the resonance frequency. We characterized the sensor by depositing Cr metal using a stencil mask and found a mass-resolution that is sufficient to weigh very small particles, like large proteins and protein complexes, with potential applications in the fields of nanobiology and medicine.","Materials class; Nanomaterials; Sensor","en","journal article","","","","","","","","","","","Dynamics of Micro and Nano Systems","","",""
"uuid:159640ba-02fe-4df2-af4b-952e519b46d9","http://resolver.tudelft.nl/uuid:159640ba-02fe-4df2-af4b-952e519b46d9","Thermal pre-processing before extraction of polyhydroxyalkanoates for molecular weight quality control","Werker, A. (TU Delft BT/Environmental Biotechnology; Wetsus, Centre for Sustainable Water Technology; University of Queensland); Pei, R. (TU Delft BT/Environmental Biotechnology; Wetsus, Centre for Sustainable Water Technology); Kim, Kevin (Wetsus, Centre for Sustainable Water Technology); Moretto, Giulia (Wetsus, Centre for Sustainable Water Technology); Estevez Alonso, A. (TU Delft BT/Environmental Biotechnology; Wetsus, Centre for Sustainable Water Technology); Vermeer, C.M. (TU Delft BT/Environmental Biotechnology); Arcos-Hernandez, Monica (Lund University); Dijkstra, Jelmer (Wetsus, Centre for Sustainable Water Technology); de Vries, Erik (Wetsus, Centre for Sustainable Water Technology)","","2023","Past studies have repeatedly demonstrated the technical feasibility to produce polyhydroxyalkanoate (PHA) using bacterial biomass of mixed microbial cultures (MMCs). Commercial quality grades of poly(3-hydroxybutyrate-co-3-hydroxyvalerate), PHBV, can be produced with control of average monomer composition. However, demonstration of PHBV production and recovery with quality control of molecular weight (MW) distribution has been lacking in the research literature. Towards this goal, a workflow has been developed for characterizing molecular weight control by thermal treatment pre-processing of dried PHA-rich biomass before solvent extraction. Dimethyl carbonate (DMC) was a suitable solvent in this workflow in the routine evaluation of extractable PHA. From assessments of DMC extraction using differential scanning calorimetry, 125 °C was selected for nominally 100 percent extraction yield independent of polymer 3-hydroxyvalerate (3HV) content (2 to 41 wt.% 3HV) and molecular weight (100 to 1400 kDa). Intrinsic viscosity measurements of PHBV in DMC at 60 °C was used for molecular weight monitoring. Mark-Houwink constants, α (0.738 ± 0.010) and LogK (-2.016 ± 0.025), were estimated for a PHBV co-polymer blend having 36 wt.% 3HV. A model of random scission supported that weight average molecular weight (Mw) was a more robust metric, compared to number average molecular weight (Mn), for assessing the polymer scission rates. During isothermal heat treatment for a given biomass batch, interpreted scission rate was reproducible and commonly, but not always, constant in time. Scission rates between biomass batches were also variable. Measured properties of the polymer in the biomass (thermal stability, biomass PHA content, PHBV grade, initial moisture content) could not be correlated to this observed batch-to-batch variation of scission rate. Molecular weight loss before extraction did not influence the melting temperatures of the co-polymer blends of PHBV evaluated over a wide sub-eutectic range of average 3HV content. Molecular weight changes for these PHBV co-polymer blends were considered to have likely influenced the nature of blend 3HV distribution, and consequently, crystallization behaviour. Molecular weight loss effects on crystallization behaviour at constant PHBV average 3HV wt.% content could then have contributed to the observed variability for glass transition temperatures and melting enthalpies. However, a reproducible correlation between this variability and MW change was not observed.","Dimethyl carbonate; Extraction; Gelation; Intrinsic viscosity; Mixed microbial cultures; Molecular weight control; Monte Carlo modelling; Polyhydroxyalkanoate production; Quality control; Random scission","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:d633e5b4-4033-46d3-a9a3-5fb93ecd50af","http://resolver.tudelft.nl/uuid:d633e5b4-4033-46d3-a9a3-5fb93ecd50af","Biotrickling Filtration for the Reduction of N2O Emitted during Wastewater Treatment: Results from a Long-Term In Situ Pilot-Scale Testing","Han, Heejoo (Korea Advanced Institute of Science and Technology); Kim, Daehyun D. (Korea Advanced Institute of Science and Technology); Song, Min Joon (Korea Advanced Institute of Science and Technology); Yun, Taeho (Korea Advanced Institute of Science and Technology); Yoon, Hyun (Korea Advanced Institute of Science and Technology; Cornell University); Lee, Hong Woon (Daega Powder Systems Co., Seoul); Kim, Young Mo (Hanyang University); Laureni, M. (TU Delft Sanitary Engineering); Yoon, S.Y. (Korea Advanced Institute of Science and Technology)","","2023","Wastewater treatment plants (WWTPs) are a major source of N2O, a potent greenhouse gas with 300 times higher global warming potential than CO2. Several approaches have been proposed for mitigation of N2O emissions from WWTPs and have shown promising yet only site-specific results. Here, self-sustaining biotrickling filtration, an end-of-the-pipe treatment technology, was tested in situ at a full-scale WWTP under realistic operational conditions. Temporally varying untreated wastewater was used as trickling medium, and no temperature control was applied. The off-gas from the covered WWTP aerated section was conveyed through the pilot-scale reactor, and an average removal efficiency of 57.9 ± 29.1% was achieved during 165 days of operation despite the generally low and largely fluctuating influent N2O concentrations (ranging between 4.8 and 96.4 ppmv). For the following 60-day period, the continuously operated reactor system removed 43.0 ± 21.2% of the periodically augmented N2O, exhibiting elimination capacities as high as 5.25 g N2O m-3·h-1. Additionally, the bench-scale experiments performed abreast corroborated the resilience of the system to short-term N2O starvations. Our results corroborate the feasibility of biotrickling filtration for mitigating N2O emitted from WWTPs and demonstrate its robustness toward suboptimal field operating conditions and N2O starvation, as also supported by analyses of the microbial compositions and nosZ gene profiles.","activated sludge; biotrickling filtration; in situ pilot test; metagenome; nitrous oxide; nitrous oxide reductase","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-08-21","","","Sanitary Engineering","","",""
"uuid:2394970d-64dd-4f75-917f-12a48630021d","http://resolver.tudelft.nl/uuid:2394970d-64dd-4f75-917f-12a48630021d","Roles of the grain-boundary characteristics and distributions on hydrogen embrittlement in face-centered cubic medium-entropy VxCr1-xCoNi alloys","Yang, Dae Cheol (Korea University); Song, Sang Yoon (Korea University); Kim, Han Jin (Korea Institute of Science and Technology); Lee, Sang In (Korea Institute of Science and Technology); Dutta, B. (TU Delft Team Marcel Sluiter); Kim, Young Kyun (Korea Institute of Materials Science); Shim, Jae Hyeok (Korea Institute of Science and Technology; Sungkyunkwan University); Suh, Jin Yoo (Korea Institute of Science and Technology); Na, Young Sang (Korea Institute of Materials Science); Sohn, Seok Su (Korea University)","","2023","The issue of hydrogen embrittlement (HE) in face-centered (FCC) structured alloys is significant for H storage and transportation application due to unanticipated damage beyond its predicted service life. This unpredictable situation may harm human life and limit hydrogen to a reliable source of renewable energy in industrial fields. Recent research has suggested that multi-principal element alloys possess high resistance to HE. However, there has been limited exploration of how their unique properties affect the HE mechanisms. In this study, using simple model VCrCoNi alloys with analogous grain sizes, the reduction rate of ductility by hydrogen uptake was measured through a slow strain rate tensile test following electro-chemical H charging. Further, the origin of HE resistance was investigated by analyzing various factors such as hydrogen contents, fracture and deformation behaviors, and grain boundary properties using thermal desorption spectroscopy, scanning electron microscope, and electron backscatter diffraction. Despite the consistent trends of the H content, stacking fault energy, and stress with increasing V content, the resistance to HE is the highest for the alloy with an intermediate ratio of V and Cr, namely, for the V0.7Cr0.3CoNi alloy. Through the analysis of grain boundary characteristics, the high resistance is attributed to large fractions of special boundaries and special triple junctions and large twin-related domain size, which suppresses crack growth and interlinkage. The favorable grain boundary characteristics result from mechanical dynamic recovery, achieved by the competitive effects of solid-solution strengthening and stacking fault energy. Thus, the present study provides novel insights into enhancing HE resistance in FCC-structured alloys.","Grain boundary characteristics; Hydrogen embrittlement; Medium-entropy alloy; Solid-solution strengthening; Stacking fault energy","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-10-13","","","Team Marcel Sluiter","","",""
"uuid:8c0aa00e-60c3-46f3-8d6a-e29504edb668","http://resolver.tudelft.nl/uuid:8c0aa00e-60c3-46f3-8d6a-e29504edb668","Experiences from the international frontlines: An exploration of the perceptions of airport employees during the COVID-19 pandemic","Tuchen, Stefan (Singapore University of Technology and Design); Nazemi, Mohsen (Singapore University of Technology and Design); Ghelfi-Waechter, Signe Maria (Zurich State Police); Kim, E.Y. (TU Delft Responsible Marketing and Consumer Behavior); Hofer, Franziska (Brainability GmbH, Zurich); Chen, Ching Fu (National Cheng Kung University); Arora, Mohit (University of Edinburgh; Imperial College London); Santema, S.C. (TU Delft Responsible Marketing and Consumer Behavior); Blessing, Lucienne (Singapore University of Technology and Design)","","2023","The aviation industry is one of the sectors that has been heavily impacted by the pandemic. While the major body of literature has focused on passenger experience and behaviour, this study focuses on airport employees instead—their experiences, perceptions, and preferences following the emergence of COVID-19. More than 1000 participants from 4 major airports—Amsterdam Airport Schiphol, Singapore Changi Airport, Taipei Taoyuan Airport, and Zurich Airport—representing over 10 different occupations, have provided a variety of sentiments about the airport as an employment ecosystem in the wake of COVID-19. Quantitatively and qualitatively surveying four different airports enabled a cross-border analysis of the results to identify interesting geographic contrasts, as well as global themes, among the responses. Regional differences regarding, the feeling of preparedness, confidence in measures, and optimism are presented. A significant difference in confidence in non-pharmaceutical measures between employees from Asian and European airports is shown. Wants and needs such as better physical/IT workplace infrastructure and more flexibility regarding job scope and hours are pointed out. The results of this research provide insights for future airport employee experience research by outlining areas to study in greater detail. Furthermore, practical implications for airport stakeholders and companies arising from the challenges experienced by the workforce are laid out to provide guidance to prepare for similar circumstances in the future and navigate the aftermath of and recovery from the pandemic.","Air transportation systems; Airport planning; Coronavirus; Frontline employees; Pandemic impact; User experience","en","journal article","","","","","","","","","","","Responsible Marketing and Consumer Behavior","","",""
"uuid:d709d14f-17b7-495f-951c-02b4b40352cd","http://resolver.tudelft.nl/uuid:d709d14f-17b7-495f-951c-02b4b40352cd","Improved Autonomous Trucker-Vehicle Dialogue under Critical Scenarios through fluid-HMI","Kabbani, T. (University of Surrey); Kim, S. (TU Delft Human Information Communication Design); Serbes, D. (Ford Otosan); Ozan, Berzah (Ford Otosan); van Egmond, R. (TU Delft Human Information Communication Design); Hartavi, Ahu Ace (University of Surrey)","","2023","Automation of vehicles not only provides greater safety, but also many previously unimagined opportunities, such as less inequality, less stress, and more meaningful activities while driving. However, the uptake and implementation of automated driving have been falling short of its promise, due to challenges in identifying safe and acceptable ways for humans to interact with automated vehicles. The human-machine interface (HMI) in vehicles plays a more critical role today than ever before. The main research question addrssed in this study, as part of the EU-funded HADRIAN project, is: What steps need to be taken to achieve effective fluid HMI (f-HMI) design for improved driver-vehicle dialogue, especially in critical scenarios?.","Fluid human-machine interface; Visual cues; Human-centric design; Minimum Risk Manevour; Critical scenario; Trucker Automated vehicle","en","journal article","","","","","","","","","","","Human Information Communication Design","","",""
"uuid:828af678-5a80-4694-8a74-77b76d8811e8","http://resolver.tudelft.nl/uuid:828af678-5a80-4694-8a74-77b76d8811e8","Plasma Polymerization of Precipitated Silica for Tire Application","Kim, S. (University of Twente); Dierkes, Wilma K. (University of Twente); Blume, Anke (University of Twente); Talma, Auke (University of Twente); van Ommen, J.R. (TU Delft ChemE/Product and Process Engineering); Courtois, Nicolas (Continental Reifen Deutschland GmbH); Davin, Julian (Continental Reifen Deutschland GmbH); Recker, Carla (Continental Reifen Deutschland GmbH); Schoeffel, Julia (Continental Reifen Deutschland GmbH)","","2023","Pre-treated silica with a plasma-deposited (PD) layer of polymerized precursors was tested concerning its compatibility with Natural Rubber (NR) and its influence on the processing of silica-silane compounds. The modification was performed in a tailor-made plasma reactor. The degree of deposition of the plasma-coated samples was analyzed by ThermoGravimetric Analysis (TGA). In addition, Diffuse Reflectance Infrared Fourier Transform spectroscopy (DRIFTs), X-ray Photoelectron Spectroscopy (XPS), and Transmission Electron Microscopy (TEM) were performed to identify the morphology of the deposited plasma polymer layer on the silica surface. PD silica samples were incorporated into a NR/silica model compound. NR compounds containing untreated silica and in-situ silane-modified silica were taken as references. The silane coupling agent used for the reference compounds was bis-(3-triethoxysilyl-propyl)disulfide (TESPD), and reference compounds with untreated silica having the full amount and 50% of silane were prepared. In addition, 50% of the silane was added to the PD silica-filled compounds in order to verify the hypothesis that additional silane coupling agents can react with silanol groups stemming from the breakdown of the silica clusters during mixing. The acetylene PD silica with 50% reduced silane-filled compounds presented comparable properties to the in-situ silane-modified reference compound containing 100% TESPD. This facilitates processing as lower amounts of volatile organic compounds, such as ethanol, are generated compared to the conventional silica-silane filler systems.","natural rubber; plasma modification (PD); precipitated silica","en","journal article","","","","","","","","","","","ChemE/Product and Process Engineering","","",""
"uuid:e03ff464-4d4b-4b76-a20e-71ac734f5f81","http://resolver.tudelft.nl/uuid:e03ff464-4d4b-4b76-a20e-71ac734f5f81","Enhancement of fire resistance and mechanical performance of polypropylene composites containing cellulose fibres and extracellular biopolymers from wastewater sludge","Kim, Nam Kyeun (The University of Auckland); Bhattacharyya, Debes (The University of Auckland); van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology); Lin, Y. (TU Delft BT/Environmental Biotechnology)","","2023","In the present research, a bio-based flame retardant (FR) was prepared using a biopolymer derived from wastewater sludge to improve the fire performance of polypropylene (PP). Extracellular polymeric substances (EPS), which were extracted from wastewater aerobic granular sludge, were absorbed into cellulose-based fibres, such as flax and toilet papers. Thermogravimetric analysis results indicated that the EPS-cellulose fibres played a significant role in enhancing the char formation of PP composite. Furthermore, the incorporation of the bio-based FR into PP restricted its vertical burning characteristics, and at the same time enhanced the tensile moduli of the composites. The reaction between phosphoric acids from EPS and hydroxyl groups of cellulose fibres improved dehydration and char formation of the composites to enhance the overall fire reaction properties. This study opens up new possibilities for the wastewater-derived biopolymer “EPS” to prepare the bio-inspired FRs for cellulose-based fibres and composites, and enhance sustainability of wastewater sludge treatment.","Bio-based flame retardant; Char formation; Extracellular polymeric substances; Thermoplastic polymer; Wastewater-derived biopolymer","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:817d1d76-3a2d-4487-b90f-366edbaafe85","http://resolver.tudelft.nl/uuid:817d1d76-3a2d-4487-b90f-366edbaafe85","Seeing the Past, Planning the Future: Proudly Celebrating 25 Years of Assisting the Convergence of Process Sciences and Design Science","Horvath, I. (TU Delft Cyber-Physical Systems); Wan, Thomas T.H. (University of Central Florida); Huang, Jingwei (University of Texas Southwestern); Coatanea, Eric (Tampere University); Rayz, Julia M. (Purdue University); Zeng, Yong (Concordia University); Kim, Kyoung Yun (Wayne State University)","","2023","This Extended Editorial has been compiled by the members of the Editorial Board to celebrate the 25th anniversary of the establishment of the Journal of Integrated Design and Process Science, which operates as the Transactions of the Society for Process and Design Science. The paper divides in three parts. The first part provides a detailed overview of the preliminaries, the objectives, and the periods of operation. It also includes a summary of the current application-orientated professional fields of interests, which are: (i) convergence mechanisms of creative scientific disciplines, (ii) convergence of artificial intelligence, team and health science, (iii) convergence concerning next-generation cyber-physical systems, and (iv) convergence in design and engineering education. The second part includes invited papers, which exemplify domains within the four fields of interest, and also represent good examples of science communication. Short synopses of the contents of these representative papers are included. The third part takes the major changes in scientific research and the academic publication arena into consideration, circumscribes the mission and vision as formulated by the current Editorial Board, and elaborates on the planned strategic exploration and utilization domains of interest.","Anniversary special issue; current profile; future perspectives and concerns; Journal of Integrated Design and Process Science; objectives and history; Society for Design and Process Science","en","review","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2024-04-13","","","Cyber-Physical Systems","","",""
"uuid:008d0b53-a30f-44e5-a3e8-e087a2180f76","http://resolver.tudelft.nl/uuid:008d0b53-a30f-44e5-a3e8-e087a2180f76","Device Aware Diagnosis for Unique Defects in STT-MRAMs","Aouichi, A. (TU Delft Electrical Engineering, Mathematics and Computer Science); Yuan, S. (TU Delft Computer Engineering; IMEC-Solliance); Fieback, M. (TU Delft Computer Engineering); Rao, Siddharth (IMEC-Solliance); Kim, Woojin (IMEC-Solliance); Marinissen, Erik Jan (IMEC-Solliance); Couet, Sebastien (IMEC-Solliance); Taouil, M. (TU Delft Computer Engineering; CognitiveIC); Hamdioui, S. (TU Delft Computer Engineering; CognitiveIC)","","2023","Spin-Transfer Torque Magnetic RAMs (STT-MRAMs) are on their way to commercialization. However, obtaining high-quality test and diagnosis solutions for STT-MRAMs is challenging due to the existence of unique defects in Magnetic Tunneling Junctions (MTJs). Recently, the Device-Aware Test (DA-Test) method has been put forward as an effective approach mainly for detecting unique defecting STT-MRAMs. In this study, we propose a further advancement based on the DA-Test framework, introducing the Device-Aware Diagnosis (DA-Diagnosis) method. This method comprises two steps: a) defining distinctive features of each unique defect by characterization and physical analysis of defective MTJs, and b) utilizing march algorithms to extract distinctive features. The effectiveness of the proposed approach is validated in an industrial setting with real devices and data measurement.","device-aware method; diagnosis; STT-MRAM; test; unique defect","en","conference paper","IEEE","","","","","","","2024-06-03","Electrical Engineering, Mathematics and Computer Science","","Computer Engineering","","",""
"uuid:3ab7c488-320d-4148-9e9c-fc84ee65c7e0","http://resolver.tudelft.nl/uuid:3ab7c488-320d-4148-9e9c-fc84ee65c7e0","The 2023 terahertz science and technology roadmap","Leitenstorfer, Alfred (Universität Konstanz); Moskalenko, Andrey S. (Korea Advanced Institute of Science and Technology); Kampfrath, Tobias (Freie Universität Berlin; Fritz-Haber-Institut der Max-Planck-Gesellschaft); Kono, Junichiro (Rice University); Kim, Ki Yong (University of Maryland); Zhang, Xi Cheng (University of Rochester Institute of Optics); Walker, Christopher; Gao, J.R. (TU Delft ImPhys/Adam group); Li, Chong (University of Glasgow)","","2023","Terahertz (THz) radiation encompasses a wide spectral range within the electromagnetic spectrum that extends from microwaves to the far infrared (100 GHz-∼30 THz). Within its frequency boundaries exist a broad variety of scientific disciplines that have presented, and continue to present, technical challenges to researchers. During the past 50 years, for instance, the demands of the scientific community have substantially evolved and with a need for advanced instrumentation to support radio astronomy, Earth observation, weather forecasting, security imaging, telecommunications, non-destructive device testing and much more. Furthermore, applications have required an emergence of technology from the laboratory environment to production-scale supply and in-the-field deployments ranging from harsh ground-based locations to deep space. In addressing these requirements, the research and development community has advanced related technology and bridged the transition between electronics and photonics that high frequency operation demands. The multidisciplinary nature of THz work was our stimulus for creating the 2017 THz Science and Technology Roadmap (Dhillon et al 2017 J. Phys. D: Appl. Phys. 50 043001). As one might envisage, though, there remains much to explore both scientifically and technically and the field has continued to develop and expand rapidly. It is timely, therefore, to revise our previous roadmap and in this 2023 version we both provide an update on key developments in established technical areas that have important scientific and public benefit, and highlight new and emerging areas that show particular promise. The developments that we describe thus span from fundamental scientific research, such as THz astronomy and the emergent area of THz quantum optics, to highly applied and commercially and societally impactful subjects that include 6G THz communications, medical imaging, and climate monitoring and prediction. Our Roadmap vision draws upon the expertise and perspective of multiple international specialists that together provide an overview of past developments and the likely challenges facing the field of THz science and technology in future decades. The document is written in a form that is accessible to policy makers who wish to gain an overview of the current state of the THz art, and for the non-specialist and curious who wish to understand available technology and challenges. A such, our experts deliver a ‘snapshot’ introduction to the current status of the field and provide suggestions for exciting future technical development directions. Ultimately, we intend the Roadmap to portray the advantages and benefits of the THz domain and to stimulate further exploration of the field in support of scientific research and commercial realisation.","photonics; spectroscopy; terahertz","en","review","","","","","","","","","","","ImPhys/Adam group","","",""
"uuid:442b79ff-b77a-44d9-bd92-482dab783d8b","http://resolver.tudelft.nl/uuid:442b79ff-b77a-44d9-bd92-482dab783d8b","Enhancing Explainability of Automated Vehicles with Culturally-Aware HMIs","Goodge, Thomas (University of Glasgow); Li, Jingyi (Ludwig Maximilians University); Patel, Shiv G. (University of British Columbia); Gravis, Victor (ENAC); Kim, S. (TU Delft Human Information Communication Design)","","2023","In the future, automated vehicles can allow much longer journeys to be undertaken without a driver. This could involve travel across countries with different road systems, traffic rules, and regulations. Disparate cultures also have different expectations of how vehicles should behave. These need to be taken into account when designing HMIs to convey vehicle behaviour and intent. In this work, we presented four scenarios where culturally-sensitive HMIs could benefit both drivers and other road users in a cross-cultural setting. This video will hopefully provoke further discussion and research interest in cross-culture human-vehicle interaction.","autonomous vehicles; cross-cultural;; eHMIs","en","conference paper","Association for Computing Machinery (ACM)","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2024-03-18","","","Human Information Communication Design","","",""
"uuid:a36ac7cb-3262-43b1-ad2d-3e93590f122a","http://resolver.tudelft.nl/uuid:a36ac7cb-3262-43b1-ad2d-3e93590f122a","Compositive role of refractory element Mo in improving strength and ductility of face-centered-cubic complex concentrated alloys","Jang, Tae Jin (Korea University); Lee, You Na (Korea University); Ikeda, Yuji (University of Stuttgart; Max-Planck-Institut für Eisenforschung); Körmann, F.H.W. (TU Delft Team Marcel Sluiter; Max-Planck-Institut für Eisenforschung); Baek, Ju Hyun (Korea Institute of Science and Technology); Do, Hyeon Seok (Pohang University of Science and Technology); Choi, Yeon Taek (Pohang University of Science and Technology); Gwon, Hojun (Pohang University of Science and Technology); Suh, Jin Yoo (Korea Institute of Science and Technology); Kim, Hyoung Seop (Pohang University of Science and Technology); Lee, Byeong Joo (Pohang University of Science and Technology); Zargaran, Alireza (Pohang University of Science and Technology); Sohn, Seok Su (Korea University)","","2023","Complex concentrated alloys (CCAs) with a face-centered-cubic (FCC) structure exhibit remarkable mechanical properties, introducing the expansion of compositional space in alloy design for structural materials. The formation of a single solid-solution phase is enabled by configuring various 3d-transition elements, while doping other elements even of a small portion generally leads to the formation of brittle intermetallic compounds. Herein, we demonstrate through a systematic investigation of single FCC (CoNi)100-xMox alloys that a wide range of refractory element Mo can simultaneously improve the strength and ductility while sustaining the solid-solution structure. The addition of Mo with a larger atomic size than those of 3d-transition elements introduces severe lattice distortion in the FCC lattice and causes grain-boundary segregation enriched by Mo atoms. In addition, increasing Mo content effectively reduces the stacking fault energy (SFE). The increased lattice distortion with Mo content enhances the solid-solution strengthening of the alloys. Besides, along with reduced SFE and stabilization of the dislocation emission site by grain-boundary segregation, this elevated solid-solution strengthening increases grain-boundary strengthening, reaching a yield strength of ∼1 GPa. Moreover, the reduction of SFE with increasing Mo results in the transition of dislocation substructures and the refinement of deformation twins, allowing for enhanced strain-hardening capability and thus ∼1.3 GPa tensile strength and ∼50% ductility. Such compositive and synergetic effects of refractory element Mo enable the CCAs with a single FCC solid solution to overcome the strength and ductility trade-off.","Complex concentrated alloy; Grain-boundary strengthening; Refractory element; Solid-solution strengthening; Strain-hardening capability","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-11-23","","","Team Marcel Sluiter","","",""
"uuid:f8d05a79-4c24-46c7-9163-7ccdab2c3c9f","http://resolver.tudelft.nl/uuid:f8d05a79-4c24-46c7-9163-7ccdab2c3c9f","Beyond Beeps: Designing Ambient Sound as a Take-Over Request in Automated Vehicles","Kim, S. (TU Delft Human Information Communication Design); Happee, R. (TU Delft Intelligent Vehicles); van Egmond, R. (TU Delft Human Information Communication Design)","","2023","The design of take-over requests in automated vehicles traditionally focuses on safety and reaction time. We are interested in how take-over requests can be designed from a broader user experience perspective while ensuring safety. This paper proposes designs for ambient sound (i.e., soundscape) and driving noise to inform the driver of transition situations. Drivers must take-over control within the time budget, the time from the take-over request to the automation system limit. The time required for a safe transition depends on the complexity of the driving environment. In a scheduled take-over, which is not an emergency, there is an opportunity for an interaction that gradually introduces the driver into the transition process. Ambient sound is expected to lead the driver back to the loop with comfort, creating a novel transition experience as well as safety.","Automated vehicles; Human-machine interaction; Sound design","en","journal article","","","","","","","","","","","Human Information Communication Design","","",""
"uuid:bcd05848-9b2b-4097-a87c-16f5d9496e96","http://resolver.tudelft.nl/uuid:bcd05848-9b2b-4097-a87c-16f5d9496e96","Testing pseudotopological and nontopological models for SMC-driven DNA loop extrusion against roadblock-traversal experiments","Barth, R. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Pradhan, B. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Kim, E. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Davidson, Iain F. (Research Institute of Molecular Pathology, Vienna); van der Torre, J. (TU Delft BN/Cees Dekker Lab); Peters, Jan Michael (Research Institute of Molecular Pathology, Vienna); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft)","","2023","DNA loop extrusion by structural-maintenance-of-chromosome (SMC) complexes has emerged as a primary organizing principle for chromosomes. The mechanism by which SMC motor proteins extrude DNA loops is still unresolved and much debated. The ring-like structure of SMC complexes prompted multiple models where the extruded DNA is topologically or pseudotopologically entrapped within the ring during loop extrusion. However, recent experiments showed the passage of roadblocks much bigger than the SMC ring size, suggesting a nontopological mechanism. Recently, attempts were made to reconcile the observed passage of large roadblocks with a pseudotopological mechanism. Here we examine the predictions of these pseudotopological models and find that they are not consistent with new experimental data on SMC roadblock encounters. Particularly, these models predict the formation of two loops and that roadblocks will reside near the stem of the loop upon encounter—both in contrast to experimental observations. Overall, the experimental data reinforce the notion of a nontopological mechanism for extrusion of DNA.","","en","journal article","","","","","","","","","","","BN/Cees Dekker Lab","","",""
"uuid:d529a28c-f087-418e-8bd1-9128ee678112","http://resolver.tudelft.nl/uuid:d529a28c-f087-418e-8bd1-9128ee678112","Photoelectrocatalytic N2 fixation and C-H oxyfunctionalization driven by H2O oxidation","Kim, Chang Hyun (Korea Advanced Institute of Science and Technology); Kim, Jinhyun (Korea Advanced Institute of Science and Technology; University of California); Hollmann, F. (TU Delft BT/Biocatalysis); Park, Chan Beum (Korea Advanced Institute of Science and Technology)","","2023","Solar-driven N2 fixation offers a green alternative to the highly energy-intensive Haber-Bosch process that releases more than 300 million metric tons of CO2 annually to form NH3. However, N2-reducing photoelectrochemical (PEC) studies have not elucidated how an oxidation reaction affects the N2 reduction reaction (NRR). Here, we report a bias-free PEC platform for N2 reduction to NH3 and H2O oxidation to O2 and H2O2. Under solar light, the molybdenum-doped bismuth vanadate-based photoanodes extract electrons from H2O and transfer them to the silicon photovoltaic-wired hematite photocathode. The light-absorbing cathode receives the electrons to drive the NRR, which is influenced by the H2O oxidation reaction's conditions. Furthermore, the integration of PEC NRR with H2O2-dependent biocatalytic oxyfunctionalization achieves simultaneous synthesis of valuable chemicals on both electrodes. This work presents the first example of a PEC NRR platform coupled with H2O oxidation and H2O2-dependent oxygenation for unbiased chemical synthesis using N2, H2O, and sunlight.","Biocatalysis; Nitrogen fixation; Oxygenation; Photoelectrocatalysis; Solar fuel","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-11-05","","","BT/Biocatalysis","","",""
"uuid:c6244ece-47ea-4ee6-bc5b-8964db50398c","http://resolver.tudelft.nl/uuid:c6244ece-47ea-4ee6-bc5b-8964db50398c","Biodegradation of Oxide Nanoparticles in Apoferritin Protein Media: A Systematic Electrochemical Approach","Rahimi, E. (TU Delft Materials Science and Engineering; Università degli Studi di Udine); Kim, Donghoon (ETH Zürich); Offoiach, Ruben (Università degli Studi di Udine); Sanchis-Gual, Roger (ETH Zürich); Chen, Xiang Zhong (ETH Zürich); Taheri, P. (TU Delft Team Peyman Taheri); Gonzalez Garcia, Y. (TU Delft Team Yaiza Gonzalez Garcia); Mol, J.M.C. (TU Delft Team Arjan Mol); Fedrizzi, Lorenzo (Università degli Studi di Udine); Pané, Salvador (ETH Zürich); Lekka, Maria (Basque Research and Technology Alliance (BRTA))","","2023","Functional oxide nanoparticles are extensively utilized in the last decades for biomedical purposes due to their unique functional properties. Nevertheless, their biodegradation mechanism by biological species, particularly by proteins at oxide/protein interfaces, still remains limited. Here, a systematic approaches is provided to investigate electrochemical behavior, electronic properties, and biodegradation mechanism of cobalt ferrite (CFO) and cobalt ferrite-bismuth ferrite (CFO-BFO) core-shell nanoparticles in apoferritin-containing media. Scanning Kelvin probe force microscopy results indicate that the presence of a thin shell (≈5 nm) of BFO on CFO causes a significant increase in surface potential. The potentiodynamic polarization measurements in different solutions showed higher anodic current densities for both samples when decreasing pH and increasing apoferritin concentration. Notably, CFO-BFO exhibits lower anodic current densities than CFO due to a slightly higher flat band potential and lower donor density distribution on CFO-BFO than on CFO, which results in lower electrochemical activity. Long-term monitoring reveals that biodegradation of both nanoparticles is accelerated by high apoferritin concentrations and acidic media, resulting in the decrease of electrochemical potentials and impedance values, and enhancement of metal ion release. Thus, this systematic biodegradation study can help to predict the lifespan and toxicity of these functional nanoparticles in biological environments.","apoferritin protein; biodegradation; CoFeO; CoFeO-BiFeO core-shell; electrochemical monitoring; electronic properties","en","journal article","","","","","","","","","","Materials Science and Engineering","Team Peyman Taheri","","",""
"uuid:45c904b0-17ed-4d31-807f-ac0998ac7ce7","http://resolver.tudelft.nl/uuid:45c904b0-17ed-4d31-807f-ac0998ac7ce7","Effects of a sidestream concentrated oxygen supply system on the membrane filtration performance of a high-loaded membrane bioreactor","Kim, S. (TU Delft BT/Environmental Biotechnology; IHE Delft Institute for Water Education; Sejong University); Curko, Josip (University of Zagreb); Matosic, Marin (University of Zagreb); Herrera, Aridai (HAC Group, Kansas City); Lopez-Vazquez, Carlos M. (IHE Delft Institute for Water Education); Brdjanovic, Damir (TU Delft BT/Environmental Biotechnology; IHE Delft Institute for Water Education); Garcia, H. (IHE Delft Institute for Water Education)","","2023","To investigate the influence of high-pressure and shear effects introduced by a concentrated oxygen supply system on the membrane filtration performance, a laboratory-scale membrane bioreactor (MBR) fed artificial municipal wastewater was operated continuously for 80 days in four phases equipped with different aerations systems: (P1) bubble diffusers (days 0–40), (P2) concentrated oxygen supply system, the supersaturated dissolved oxygen (SDOX) (days 41–56), (P3) bubble diffusers (days 57–74), and (P4) SDOX (days 75–80). Various sludge physical-chemical parameters, visual inspection of the membrane, and permeability evaluations were performed. Results showed that the high-pressure effects contributed to fouling of the membranes compared to the bubble diffuser aeration system. Biofouling by microorganisms appeared to be the main contributor to the cake layer when bubble diffusers were used, while fouling by organic matter seemed to be the main contributor to the cake layer when SDOX was used. Small particle size distribution (PSD) (ranging from 1 to 10 and 1–50 μm in size) fractions are a main parameter affecting the intense fouling of membranes (e.g., formation of a dense and thin cake layer). However, PSD alone cannot explain the worsened membrane fouling tendency. Therefore, it can be assumed that a combination of several factors (which certainly includes PSD) led to the severe membrane fouling caused by the high-pressure and shear.","Bubble diffuser; Cake layer; High-pressure; Membrane fouling; Oxygen transfer; Particle size distribution","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:580e5a49-5028-45fa-bcf6-0747836ecf40","http://resolver.tudelft.nl/uuid:580e5a49-5028-45fa-bcf6-0747836ecf40","An Area-Efficient Ultra-Low-Power Time-Domain Feature Extractor for Edge Keyword Spotting","Chen, Qinyu (University of Zürich); Chang, Yaoxing (University of Zürich); Kim, Kwantae (University of Zürich); Gao, C. (TU Delft Electronics); Liu, Shih Chii (University of Zürich)","","2023","Keyword spotting (KWS) is an important task on edge low-power audio devices. A typical edge KWS system consists of a front-end feature extractor which outputs mel-scale frequency cepstral coefficients (MFCC) features followed by a back-end neural network classifier. KWS edge designs aim for the best power-performance-area metrics. This work proposes an area-efficient ultra-low-power time-domain infinite impulse response (IIR) filter-based feature extractor for a KWS system. It uses a serial architecture, and the architecture is further optimized for a low-cost computing structure and mixed-precision bit selection of the IIR coefficients while maintaining good KWS accuracy. Using a 65 nm process technology and a back-end neural network classifier, this simulated feature extractor has an area of 0.02 mm2 and achieves 3.3 μW @ 1.2 V, and achieves 92.5% accuracy on a 10-keyword, 12-class KWS task using the GSCD dataset.","hardware acceleration; infinite impulse response (IIR); Keyword spotting (KWS); long short-term memory","en","conference paper","Institute of Electrical and Electronics Engineers (IEEE)","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2024-01-22","","","Electronics","","",""
"uuid:b91d058f-b9f2-44ba-bb87-714d72d23935","http://resolver.tudelft.nl/uuid:b91d058f-b9f2-44ba-bb87-714d72d23935","RadioAstron Space VLBI Imaging of the Jet in M87. I. Detection of High Brightness Temperature at 22 GHz","Kim, Jae Young (Kyungpook National University; Max-Planck-Institute for Radio Astronomy); Savolainen, Tuomas (Max-Planck-Institute for Radio Astronomy; Aalto University); Voitsik, Petr (Russian Academy of Sciences); Kravchenko, Evgeniya V. (Russian Academy of Sciences; Moscow Institute of Physics and Technology); Lisakov, Mikhail M. (Max-Planck-Institute for Radio Astronomy; Russian Academy of Sciences); Kovalev, Yuri Y. (Max-Planck-Institute for Radio Astronomy; Russian Academy of Sciences; Moscow Institute of Physics and Technology); Müller, Hendrik (Max-Planck-Institute for Radio Astronomy); Gurvits, L. (TU Delft Astrodynamics & Space Missions; Joint Institute for VLBI ERIC); Lee, S. (TU Delft Space & Type; Korea Astronomy and Space Science Institute)","","2023","We present results from the first 22 GHz space very long baseline interferometric (VLBI) imaging observations of M87 by RadioAstron. As a part of the Nearby AGN Key Science Program, the source was observed in 2014 February at 22 GHz with 21 ground stations, reaching projected (u, v) spacings up to ∼11 Gλ. The imaging experiment was complemented by snapshot RadioAstron data of M87 obtained during 2013-2016 from the AGN Survey Key Science Program. Their longest baselines extend up to ∼25 Gλ. For all of these measurements, fringes are detected only up to ∼2.8 Earth diameter or ∼3 Gλ baseline lengths, resulting in a new image with angular resolution of ∼150 μas or ∼20 Schwarzschild radii spatial resolution. The new image not only shows edge-brightened jet and counterjet structures down to submilliarcsecond scales but also clearly resolves the VLBI core region. While the overall size of the core is comparable to those reported in the literature, the ground-space fringe detection and slightly superresolved RadioAstron image suggest the presence of substructures in the nucleus, whose minimum brightness temperature exceeds T B , min ∼ 10 12 K. It is challenging to explain the origin of this record-high T B , min value for M87 by pure Doppler boosting effect with a simple conical jet geometry and known jet speed. Therefore, this can be evidence for more extreme Doppler boosting due to a blazar-like small jet viewing angle or highly efficient particle acceleration processes occurring already at the base of the outflow.","","en","journal article","","","","","","","","","","","Astrodynamics & Space Missions","","",""
"uuid:d1374e6c-27cb-407e-82a8-b617974a525b","http://resolver.tudelft.nl/uuid:d1374e6c-27cb-407e-82a8-b617974a525b","A Machine with Short-Term, Episodic, and Semantic Memory Systems","Kim, Taewoon (Vrije Universiteit Amsterdam); Cochez, Michael (Vrije Universiteit Amsterdam); François-Lavet, Vincent (Vrije Universiteit Amsterdam); Neerincx, M.A. (TU Delft Interactive Intelligence); Vossen, Piek (Vrije Universiteit Amsterdam)","Williams, Brian (editor); Chen, Yiling (editor); Neville, Jennifer (editor)","2023","Inspired by the cognitive science theory of the explicit human memory systems, we have modeled an agent with short-term, episodic, and semantic memory systems, each of which is modeled with a knowledge graph. To evaluate this system and analyze the behavior of this agent, we designed and released our own reinforcement learning agent environment, “the Room”, where an agent has to learn how to encode, store, and retrieve memories to maximize its return by answering questions. We show that our deep Q-learning based agent successfully learns whether a short-term memory should be forgotten, or rather be stored in the episodic or semantic memory systems. Our experiments indicate that an agent with human-like memory systems can outperform an agent without this memory structure in the environment.","","en","conference paper","American Association for Artificial Intelligence (AAAI)","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-12-27","","","Interactive Intelligence","","",""
"uuid:0e5e4fb1-0992-42cf-8432-8e02f28bdbd8","http://resolver.tudelft.nl/uuid:0e5e4fb1-0992-42cf-8432-8e02f28bdbd8","Infrared thermography: philosophy, approaches, analysis—processing, and guidelines","Shrestha, Ranjit (Kathmandu University); Moradi, M. (TU Delft Structural Integrity & Composites); Sfarra, Stefano (University of L'Aquila); Kim, Wontae (Kongju National University)","","2023","The infrared thermography (IRT) technique has shown great potential with many applications in a variety of fields, such as aerospace, petroleum, civil engineering, and so forth. This chapter is designed to provide an overview of the method of IRT in non-destructive material evaluation. It begins with the general introduction and development of the IRT. It follows the basic principles of the electromagnetic spectrum and radiative energy concepts. Following the introduction of different types of thermography, applications in the non-destructive testing fields are provided. The next section focuses on recent trends and developments, in particular the integration of IRT with other technologies namely ultrasonic, acoustic emission, and so on. By assigning a data analysis section, data processing techniques are described by dividing them into two conventional and advanced categories. The numerical modeling and simulation of the IRT inspection process are then presented as beneficial applications. In addition, the relevant standards have been specified in a short separate section. To testify to the effectiveness of the IRT, a case study of a steel sample inspection is provided at the end of the chapter itself.","examples of inspections; infrared thermography (IRT); material evaluation; non-destructive testing (NDT); numerical modeling; thermal infrared radiation","en","book chapter","Elsevier","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2024-03-11","","","Structural Integrity & Composites","","",""
"uuid:1662ab09-95dc-4289-8faf-13a6bb22ef3b","http://resolver.tudelft.nl/uuid:1662ab09-95dc-4289-8faf-13a6bb22ef3b","Cyano-Chromic Interface: Aligning Human-Microbe Temporalities Towards Noticing and Attending to Living Artefacts","Zhou, J. (TU Delft Mechatronic Design); Kim, Raphael (TU Delft Materials and Manufacturing); Doubrovski, E.L. (TU Delft Mechatronic Design); Soares de Oliveira Martins, J. (TU Delft Mechatronic Design); Giaccardi, Elisa (TU Delft Human Information Communication Design); Karana, E. (TU Delft Emerging Materials; Avans University of Applied Sciences)","Byrne, D. (editor); Martelaro, N. (editor)","2023","Microbes offer designers opportunities to endow artefacts with environmental sensing and adapting abilities, and unique expressions. However, microbe-embedded artefacts present a challenge of temporal dissonance, reflected by a “time lag” typically experienced by humans in noticing the gradual and minute shifts in microbial metabolism. This could compromise fluency of interactions and may hinder timely noticing and attending to microbes in living artefacts. In addressing this challenge, we introduce Cyano-chromic Interface, in which photosynthetic activity of cyanobacteria (Synechocystis sp. PCC6803) is timely surfaced by an electrochromic (EC) material through its monochromatic display. Grounded through interface performance characterization and design primitives, we developed application concepts through which we instantiate how the interface can be tuned for diverse functional and experiential outcomes in living artefacts. We further discuss the potential of aligning human-microbe temporalities for enriched interactions and reciprocal relationships with microbes, and beyond.","cyanobacteria; human-microbe interactions; temporality; living media interfaces; microbial displays; Biological-HCI; microorganisms; surfacing livingness","en","conference paper","Association for Computing Machinery (ACM)","","","","","","","","","","Mechatronic Design","","",""
"uuid:22531bf0-d535-4dec-bfab-636974e488ad","http://resolver.tudelft.nl/uuid:22531bf0-d535-4dec-bfab-636974e488ad","Investigating the adoption of autonomous processes in the context of organizations","Gomez Beldarrain, G. (TU Delft Responsible Marketing and Consumer Behavior); Kim, E.Y. (TU Delft Responsible Marketing and Consumer Behavior); Verma, H. (TU Delft Human-Centred Artificial Intelligence); Bozzon, A. (TU Delft Human-Centred Artificial Intelligence)","","2023","","Package design; Printing technology; Food culture; Cultural progress; Media","en","conference paper","","","","","","","","","","","Responsible Marketing and Consumer Behavior","","",""
"uuid:93fc3c7b-b94a-4792-9cfb-4023ebebc31a","http://resolver.tudelft.nl/uuid:93fc3c7b-b94a-4792-9cfb-4023ebebc31a","Applications of supersaturated oxygenation to biological wastewater treatment with high biomass content","Kim, S. (TU Delft BT/Environmental Biotechnology)","Brdjanovic, Damir (promotor); Garcia, H. (copromotor); Delft University of Technology (degree granting institution)","2022","The operation of membrane bioreactors (MBRs) at high mixed liquor suspended solids (M1SS) concentrations (higher than 15 g 1-1) may enhance the loading rate treatment capacity, while minimizing even further the MBR system's footprint. However, oxygen transfer in wastewater treatment is significantly influenced by the M1SS concentrations. Particularly, conventional diffused aeration systems (fine and coarse bubble diffusers) exhibit a poor oxygen transfer in wastewater treatment applications; particularly, when operating at M1SS concentrations higher than 15 g 1-1• The oxygen transfer performance of the supersaturated dissolved oxygen (SDOX) system was evaluated in activated sludge with M1SS concentrations from 4 to 40 g 1-1 as a promising technology for uncapping such limitation. The operational conditions exerted by the SDOX technology did not affect the concentration of active biomass. Moreover, the biological performance of the MBR was not affected by the introduction of the SDOX technology. In addition, the microbial community was relatively stable although some variations at the family and genus level were evident during each of the study phases. Indeed, the membrane filtration performance was affected by the SDOX technology. A combination of several factors ( certainly including particle size distribution of sludge) resulted in the serious membrane fouling imposed by the high-pressure and shear effects. However, this could be influenced due to the scale of the laboratory-based research. More research would be needed to confirm those findings.","","en","doctoral thesis","IHE Delft Institute for Water Education","978-90-73445-44-4","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:f17a4315-7fef-4a15-9f08-8b56c1e491dc","http://resolver.tudelft.nl/uuid:f17a4315-7fef-4a15-9f08-8b56c1e491dc","Blockchain technologies empowering peer-to-peer trading in multi-energy systems: From advanced technologies towards applications","Hua, Weiqi (University of Oxford); Luo, Fengji (University of Sydney); Du, Liang (Temple University); Chen, Sijie (Shanghai Jiao Tong University); Kim, Taesic (Texas A and M University); Morstyn, Thomas (University of Edinburgh); Robu, Valentin (TU Delft Algorithmics; Centrum Wiskunde & Informatica (CWI)); Zhou, Yue (Cardiff University)","","2022","","","en","contribution to periodical","","","","","","","","","","","Algorithmics","","",""
"uuid:af7a4563-455f-4dc8-a2c6-039053997127","http://resolver.tudelft.nl/uuid:af7a4563-455f-4dc8-a2c6-039053997127","Microstructural and Hardness Behavior of H13 Tool Steel Manufactured by Ultrasound-Assisted Laser-Directed Energy Deposition","Masaylo, Dmitriy (Peter the Great Saint-Petersburg Polytechnic University); Igoshin, Sergei (Peter the Great Saint-Petersburg Polytechnic University); Popovich, Anatoly (Peter the Great Saint-Petersburg Polytechnic University); Orlov, Alexey (Peter the Great Saint-Petersburg Polytechnic University); Kim, Artem (Peter the Great Saint-Petersburg Polytechnic University); Popovich, V. (TU Delft Team Vera Popovich; Peter the Great Saint-Petersburg Polytechnic University)","","2022","Metal additive manufacturing (AM) by Laser-Directed Energy Deposition (L-DED) usually results in the formation of textured columnar grains along the build direction, leading to anisotropic mechanical properties. This can negatively affect the intended application of the product. Anisotropy can be eliminated by modifying the material through an additional exposure to ultrasound (US-assisted) during the L-DED process. In this paper, a multi-track sample was manufactured from AISI H13 (TLS Technik, Bitterfeld-Wolfen, Germany) tool steel by a US-assisted (28 kHz) L-DED process using a specially designed cooling system. The study also included post-process annealing and quenching with the tempering heat treatment of the modified steel, resulting in the retention of the properties, as confirmed by hardness measurements. XRD analysis was used to measure the structural parameters of the unit cell, and the hardness properties were measured in two directions: longitudinally and parallel to the deposition direction. It was found that US-assisted L-DED allows us to obtain a more isotropic structure with an equal size of the coherent scattering region in two printing directions, and to reduce the residual stresses in the material. The anisotropy of the hardness was significantly reduced, with 636 and 640 HV found between the XY and XZ planes. Based on the obtained hardness data, it should be noted that some of the heat treatments studied herein can also result in a decrease in the anisotropy of the properties, similarly to the US-assisted effect.","additive manufacturing; US-assisted; laser-directed energy deposition; anisotropy; columnar grains; H13 tool steel","en","journal article","","","","","","","","","","","Team Vera Popovich","","",""
"uuid:e11bdfc7-f0e5-4358-9410-c5e9f67eb54b","http://resolver.tudelft.nl/uuid:e11bdfc7-f0e5-4358-9410-c5e9f67eb54b","A Classification-Based Machine Learning Approach to the Prediction of Cyanobacterial Blooms in Chilgok Weir, South Korea","Kim, J. (TU Delft Water Resources; IHE Delft Institute for Water Education; Human Resources Development Institute); Jonoski, Andreja (IHE Delft Institute for Water Education); Solomatine, D.P. (TU Delft Water Resources; IHE Delft Institute for Water Education; Russian Academy of Sciences)","","2022","Cyanobacterial blooms appear by complex causes such as water quality, climate, and hydrological factors. This study aims to present the machine learning models to predict occurrences of these complicated cyanobacterial blooms efficiently and effectively. The dataset was classified into groups consisting of two, three, or four classes based on cyanobacterial cell density after a week, which was used as the target variable. We developed 96 machine learning models for Chilgok weir using four classification algorithms: k-Nearest Neighbor, Decision Tree, Logistic Regression, and Support Vector Machine. In the modeling methodology, we first selected input features by applying ANOVA (Analysis of Variance) and solving a multi-collinearity problem as a process of feature selection, which is a method of removing irrelevant features to a target variable. Next, we adopted an oversampling method to resolve the problem of having an imbalanced dataset. Consequently, the best performance was achieved for models using datasets divided into two classes, with an accuracy of 80% or more. Comparatively, we confirmed low accuracy of approximately 60% for models using datasets divided into three classes. Moreover, while we produced models with overall high accuracy when using logCyano (logarithm of cyanobacterial cell density) as a feature, several models in combination with air temperature and NO3-N (nitrate nitrogen) using two classes also demonstrated more than 80% accuracy. It can be concluded that it is possible to develop very accurate classification-based machine learning models with two features related to cyanobacterial blooms. This proved that we could make efficient and effective models with a low number of inputs.","cyanobacterial blooms; machine learning; classification algorithm; feature selection; imbalanced dataset; oversampling","en","journal article","","","","","","","","","","","Water Resources","","",""
"uuid:d9d35dae-b424-4c38-9e1e-dabe732eff10","http://resolver.tudelft.nl/uuid:d9d35dae-b424-4c38-9e1e-dabe732eff10","Wind turbine load estimation using machine learning and transfer learning","Xu, G. (TU Delft Wind Energy); Yu, W. (TU Delft Wind Energy); Kim, Taeseong (Technical University of Denmark)","","2022","Machine learning method has always been popular to solve wind turbine related problems at a data level. However, with the limitation of the availability of relevant data, transfer learning has gained increasing attention. In this study, traditional machine learning method of artificial neural networks (ANN), together with parameter-based transfer learning method has been used to estimate wind turbine load. First, ANN load model was built for DTU 10MW wind turbine as well as NREL 5MW wind turbine. Then, parameter-based transfer learning has been applied to the above-mentioned models to estimate load for a different turbine type or two mixed turbine types. Results indicate that ANN method provides good estimation on wind turbine fatigue load. For DTU 10MW ANN model, the trend of accuracy becomes steady as the number of input samples increases and 1500 samples is deemed as the optimal number of samples for training DTU 10MW. In addition, with transfer learning, it was succeeded in building NREL 5MW model with corresponding DTU 10MW pretrained model but failed in establishing mixed dataset model neither with DTU 10MW nor with NREL 5MW pretrained model.","","en","journal article","","","","","","","","","","","Wind Energy","","",""
"uuid:2e8b2274-eef4-4c79-b76e-76fbfc21c133","http://resolver.tudelft.nl/uuid:2e8b2274-eef4-4c79-b76e-76fbfc21c133","SALoBa: Maximizing Data Locality and Workload Balance for Fast Sequence Alignment on GPUs","Park, Seongyeon (Yonsei University); Kim, Hajin (Yonsei University); Ahmad, T. (TU Delft Computer Engineering); Ahmed, N. (TU Delft Numerical Analysis); Al-Ars, Z. (TU Delft Computer Engineering); Hofstee, H.P. (TU Delft Computer Engineering; IBM); Kim, Youngsok (Yonsei University); Lee, Jinho (Yonsei University)","O'Conner, L. (editor)","2022","Sequence alignment forms an important backbone in many sequencing applications. A commonly used strategy for sequence alignment is an approximate string matching with a two-dimensional dynamic programming approach. Although some prior work has been conducted on GPU acceleration of a sequence alignment, we identify several shortcomings that limit exploiting the full computational capability of modern GPUs. This paper presents SALoBa, a GPU-accelerated sequence alignment library focused on seed extension. Based on the analysis of previous work with real-world sequencing data, we propose techniques to exploit the data locality and improve work-load balancing. The experimental results reveal that SALoBa significantly improves the seed extension kernel compared to state-of-the-art GPU-based methods.","Genome sequencing; Sequence alignment; Smith-Waterman; GPU acceleration","en","conference paper","IEEE","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","Computer Engineering","","",""
"uuid:3055d17f-b61b-4634-897e-066ac6e4a3c5","http://resolver.tudelft.nl/uuid:3055d17f-b61b-4634-897e-066ac6e4a3c5","Metaverse beyond the hype: Multidisciplinary perspectives on emerging challenges, opportunities, and agenda for research, practice and policy","Dwivedi, Yogesh K. (Symbiosis Institute of Business Management, Pune); Hughes, Laurie; Baabdullah, Abdullah M. (King Abdulaziz University); Ribeiro-Navarrete, Samuel (ESIC Business & Marketing School); Giannakis, Mihalis (Audencia); Al-Debei, Mutaz M. (Al-Ahliyya Amman University; The University of Jordan); Dennehy, Denis; Metri, Bhimaraya (Indian Institute of Management Nagpur); Buhalis, Dimitrios (Bournemouth University Business School UK and Visiting Professor); Cheung, Christy M.K. (Hong Kong Baptist University); Conboy, Kieran (National University of Ireland Galway); Doyle, Ronan (Lero – The Irish Software Research Centre & National University of Ireland); Dubey, Rameshwar (Montpellier Research in Management; Liverpool Business School); Dutot, Vincent (IPAG Business School,); Felix, Reto (University of Texas Rio Grande Valley); Goyal, D. P. (Indian Institute of Management Shillong); Gustafsson, Anders (BI Norwegian Business School); Hinsch, Chris (Grand Valley State University); Jebabli, Ikram (Université Internationale de Rabat); Janssen, M.F.W.H.A. (TU Delft Information and Communication Technology); Kim, Young Gab (Sejong University); Kim, Jooyoung (University of Georgia); Koos, Stefan (University of the Federal Armed Forces Munich); Kreps, David (NUI Galway); Kshetri, Nir (Bryan School of Business and Economics); Kumar, Vikram (Student TU Delft); Ooi, Keng Boon (UCSI University; Chang Jung Christian University; Nanchang Institute of Technology); Papagiannidis, Savvas (Newcastle University); Pappas, Ilias O. (University of Agder; Norwegian University of Science and Technology (NTNU)); Polyviou, Ariana (University of Nicosia); Park, Sang Min (Korea University); Pandey, Neeraj (National Institute of Industrial Engineering); Queiroz, Maciel M. (FGV EAESP); Raman, Ramakrishnan (Symbiosis Institute of Business Management, Pune); Rauschnabel, Philipp A. (University of the Federal Armed Forces Munich); Shirish, Anuragini (Université Paris-Saclay); Sigala, Marianna (University of Piraeus; Curtin University); Spanaki, Konstantina (Audencia); Wei-Han Tan, Garry (UCSI University; Nanchang Institute of Technology); Tiwari, Manoj Kumar (National Institute of Industrial Engineering; Indian Institute of Technology Kharagpur); Viglia, Giampaolo (University of Portsmouth; University of Aosta Valley); Wamba, Samuel Fosso (TBS Business School)","","2022","The metaverse has the potential to extend the physical world using augmented and virtual reality technologies allowing users to seamlessly interact within real and simulated environments using avatars and holograms. Virtual environments and immersive games (such as, Second Life, Fortnite, Roblox and VRChat) have been described as antecedents of the metaverse and offer some insight to the potential socio-economic impact of a fully functional persistent cross platform metaverse. Separating the hype and “meta…” rebranding from current reality is difficult, as “big tech” paints a picture of the transformative nature of the metaverse and how it will positively impact people in their work, leisure, and social interaction. The potential impact on the way we conduct business, interact with brands and others, and develop shared experiences is likely to be transformational as the distinct lines between physical and digital are likely to be somewhat blurred from current perceptions. However, although the technology and infrastructure does not yet exist to allow the development of new immersive virtual worlds at scale - one that our avatars could transcend across platforms, researchers are increasingly examining the transformative impact of the metaverse. Impacted sectors include marketing, education, healthcare as well as societal effects relating to social interaction factors from widespread adoption, and issues relating to trust, privacy, bias, disinformation, application of law as well as psychological aspects linked to addiction and impact on vulnerable people. This study examines these topics in detail by combining the informed narrative and multi-perspective approach from experts with varied disciplinary backgrounds on many aspects of the metaverse and its transformational impact. The paper concludes by proposing a future research agenda that is valuable for researchers, professionals and policy makers alike.","Augmented reality; Avatars; Extended reality; Metaverse; Second life; Virtual reality; Virtual world","en","journal article","","","","","","","","","","","Information and Communication Technology","","",""
"uuid:a39ce56e-1426-4206-8b27-9f4221b080a3","http://resolver.tudelft.nl/uuid:a39ce56e-1426-4206-8b27-9f4221b080a3","External drivers of BOLD signal's non-stationarity","Ashourvan, Arian (University of Kansas Lawrence); Gonçalves Melo Pequito, S.D. (TU Delft Team Sergio Pequito); Bertolero, Maxwell (University of Pennsylvania); Kim, Jason Z. (University of Pennsylvania); Bassett, Danielle S. (University of Pennsylvania); Litt, Brian (University of Pennsylvania)","","2022","A fundamental challenge in neuroscience is to uncover the principles governing how the brain interacts with the external environment. However, assumptions about external stimuli fundamentally constrain current computational models. We show in silico that unknown external stimulation can produce error in the estimated linear time-invariant dynamical system. To address these limitations, we propose an approach to retrieve the external (unknown) input parameters and demonstrate that the estimated system parameters during external input quiescence uncover spatiotemporal profiles of external inputs over external stimulation periods more accurately. Finally, we unveil the expected (and unexpected) sensory and task-related extra-cortical input profiles using functional magnetic resonance imaging data acquired from 96 subjects (Human Connectome Project) during the resting-state and task scans. This dynamical systems model of the brain offers information on the structure and dimensionality of the BOLD signal's external drivers and shines a light on the likely external sources contributing to the BOLD signal's non-stationarity. Our findings show the role of exogenous inputs in the BOLD dynamics and highlight the importance of accounting for external inputs to unravel the brain's time-varying functional dynamics.","","en","journal article","","","","","","","","","","","Team Sergio Pequito","","",""
"uuid:84a6d145-6ad1-46f2-b3ff-af4bc95916bd","http://resolver.tudelft.nl/uuid:84a6d145-6ad1-46f2-b3ff-af4bc95916bd","Light intensity defines growth and photopigment content of a mixed culture of purple phototrophic bacteria","Cerruti, M. (TU Delft BT/Environmental Biotechnology); Kim, J.H. (Student TU Delft); Pabst, Martin (TU Delft BT/Environmental Biotechnology); van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology); Weissbrodt, D.G. (TU Delft BT/Environmental Biotechnology)","","2022","Purple bacteria (PPB), anoxygenic photoorganoheterotrophic organisms with a hyper-versatile metabolism and high biomass yields over substrate, are promising candidates for the recovery of nutrient resources from wastewater. Infrared light is a pivotal parameter to control and design PPB-based resource recovery. However, the effects of light intensities on the physiology and selection of PPB in mixed cultures have not been studied to date. Here, we examined the effect of infrared irradiance on PPB physiology, enrichment, and growth over a large range of irradiance (0 to 350 W m−2) in an anaerobic mixed-culture sequencing batch photobioreactor. We developed an empirical mathematical model that suggests higher PPB growth rates as response to higher irradiance. Moreover, PPB adapted to light intensity by modulating the abundances of their phototrophic complexes. The obtained results provide an in-depth phylogenetic and metabolic insight the impact of irradiance on PPB. Our findings deliver the fundamental information for guiding the design of light-driven, anaerobic mixed-culture PPB processes for wastewater treatment and bioproduct valorization.","anaerobic wastewater treatment; water resource recovery; PNSB; irradiance effects; pigments","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:a7f8ad3a-cf55-4350-a71b-6b605ca908bb","http://resolver.tudelft.nl/uuid:a7f8ad3a-cf55-4350-a71b-6b605ca908bb","A 23-μW Keyword Spotting IC With Ring-Oscillator-Based Time-Domain Feature Extraction","Kim, Kwantae (Korea Advanced Institute of Science and Technology; University of Zürich); Gao, C. (TU Delft Electronics); Graca, Rui (University of Zürich); Kiselev, Ilya (University of Zürich); Yoo, Hoi Jun (Korea Advanced Institute of Science and Technology); Delbruck, Tobi (University of Zürich); Liu, Shih Chii (University of Zürich)","","2022","This article presents the first keyword spotting (KWS) IC that uses a ring-oscillator-based time-domain processing technique for its analog feature extractor (FEx). Its extensive usage of time-encoding schemes allows the analog audio signal to be processed in a fully time-domain manner except for the voltage-to-time conversion stage of the analog front end. Benefiting from fundamental building blocks based on digital logic gates, it offers better technology scalability compared to conventional voltage-domain designs. Fabricated in a 65-nm CMOS process, the prototyped KWS IC occupies 2.03 mm 2 and dissipates 23- $\mu \text{W}$ power consumption, including analog FEx and digital neural network classifier. The 16-channel time-domain FEx achieves a 54.89-dB dynamic range for 16-ms frame shift size while consuming 9.3 $\mu \text{W}$. The measurement result verifies that the proposed IC performs a 12-class KWS task on the Google Speech Command dataset (GSCD) with >86% accuracy and 12.4-ms latency.","Analog; bandpass filter (BPF); classifier; feature extractor (FEx); Google Speech Command dataset (GSCD); keyword spotting (KWS); rectifier; recurrent neural network (RNN); ring oscillator; time domain","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","Electronics","","",""
"uuid:a2d4e771-88ae-4255-bf65-3997c1d14d1d","http://resolver.tudelft.nl/uuid:a2d4e771-88ae-4255-bf65-3997c1d14d1d","Situation Awareness Prompts: Bridging the Gap between Supervisory and Manual Air Traffic Control","Kim, Munyung (Student TU Delft); Borst, C. (TU Delft Control & Simulation); Mulder, Max (TU Delft Control & Simulation)","","2022","To meet increasing safety and performance demands in air traffic control (ATC), more advanced automated systems will be introduced to assist human air traffic controllers. Some even foresee complete automation, with the human as a supervisor only to step-in when automation fails. Literature and empirical evidence suggest that supervising highly-automated systems can cause severe vigilance and complacency problems, out-of-the-loop situation awareness and transient workload peaks. These impair the ability for humans to successfully take over control. In this study, situation awareness prompts were used as a way to keep controllers cognitively engaged during their supervision of a fully automated ATC system. Results from an exploratory human-in-the-loop experiment, in which eight participants were instructed to monitor a fully automated ATC system in a simplified ATC context, show a significant decrease in workload peaks following an automation failure after being exposed to high-level SA questions. Although the selected method did not necessarily yield improved safety and manual control efficiency, results suggest that using situation awareness feedback in line with controllers' attention could be an avenue worth exploring further as a training tool.","cooperation; Decision making and cognitive processes; degree of automation; Human centred automation; Shared control","en","journal article","","","","","","","","","","","Control & Simulation","","",""
"uuid:c829324d-47da-459a-87e6-4787de51044c","http://resolver.tudelft.nl/uuid:c829324d-47da-459a-87e6-4787de51044c","A Multi-metric Modular Framework for Human-like Gait Analysis Based on a Recorded Set of Variable Gait Patterns","Kapteijn, S. (Student TU Delft); Kim, Wansoo (Hanyang University); Marchal Crespo, L. (TU Delft Human-Robot Interaction; University of Bern); Peternel, L. (TU Delft Human-Robot Interaction)","","2022","Walking is an essential part of almost all activities of daily living. We use different gait patterns in different situations, e.g., moving around the house, performing various sports, or when compensating for an injury. However, how humans perform this gait tailoring remains a partially unknown process. To this end, the influence of various performance metrics on the optimality and diversity of gait patterns can provide us with more insight. To analyse gait in terms of pattern diversity and performance metrics related to physical aspects, such as joint torque, fatigue, and manipulability, we propose a multi-metric gait analysis framework that simultaneously accounts for these parameters. We used a recorded set of versatile gait patterns that are already dynamically stable and physiologically feasible. To that end, 45 gait variations-varying in stride length, step height, and walking speed-were recorded in a motion capture experiment. Results of analysis using the recorded dataset are presented for a baseline case (with all optimisation weights set to one), which serves as the first step for future research, in particular giving insights into specific aspects of the gait, e.g., joint loading, long-term performance, and capacity to sustain ground reaction forces.","","en","conference paper","IEEE","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","Human-Robot Interaction","","",""
"uuid:cb074e80-4f75-41d9-906a-b907d21d992b","http://resolver.tudelft.nl/uuid:cb074e80-4f75-41d9-906a-b907d21d992b","Designing living artefacts: Opportunities and challenges for biodesign","Kim, Raphael (TU Delft Materials and Manufacturing); Zhou, J. (Student TU Delft); Groutars, E.G. (TU Delft Mechatronic Design; Avans University of Applied Sciences); Karana, E. (TU Delft Emerging Materials)","","2022","Biodesign is an emerging form of design practice integrating biological materials and processes, and there is a growing interest in the field for structured conversations to generate insights on how it can be best taught, researched, and disseminated. In our conversations, we began exploring biodesign under the framework of Living Artefacts, in which livingness is prolonged to the use time of artefacts, and understood as a biological, ecological, and experiential phenomenon. Two researchers investigating Living Artefacts, through their short show-and-tell presentations, initiated threads of moderated open discussions. Using the Living Artefacts framework as a departure point, we collectively explored opportunities and challenges in biodesign, and possible ways in which they could be addressed.","biodesign; living artefacts; living aesthetics; habitabilities; microorganisms","en","conference paper","","","","","","","","","","","Materials and Manufacturing","","",""
"uuid:fd570765-74c1-4a74-b5df-97c401a06419","http://resolver.tudelft.nl/uuid:fd570765-74c1-4a74-b5df-97c401a06419","A study on strategic activities to foster design practices in a local government organization","Kim, A. (TU Delft Methodologie en Organisatie van Design); van der Bijl-Brouwer, M. (TU Delft Methodologie en Organisatie van Design); Mulder, I. (TU Delft Design Conceptualization and Communication); Lloyd, P.A. (TU Delft Methodologie en Organisatie van Design)","","2022","In recent years, governments have increasingly pursued innovation by embed-ding design into their organizations. One particularly common approach to em-bedding design in government organization is to establish public sector innova-tion labs. These labs are described as contributors and facilitators of innovation in policymaking processes; however, less light has been shed on the role of in-house designers (including these labs) in fostering and managing the changes made by design practices within government organizations. In the current study, design management has been used as a theoretical lens to study the strategic activities of in-house designers in a Dutch municipality to embed design within the organization. The findings show the importance of strategic activity by in-house designers to foster design practice and resulting organizational changes and the need for participation of more organizational members in this activity. We conclude with setting an agenda for more research and practices on strategic activities to foster design practices and organizational changes in government.","design for policy; embedding design; design management; Local government","en","conference paper","","","","","","","","","","","Methodologie en Organisatie van Design","","",""
"uuid:3f46daac-aaa9-47e6-ad0f-5153c1f6429c","http://resolver.tudelft.nl/uuid:3f46daac-aaa9-47e6-ad0f-5153c1f6429c","Surface Oxidation and Wettability of Fe–Mn and Fe–Mn–Si-Alloyed Steel After Annealing","You, Y. (TU Delft Team Kevin Rossi); Kim, Jungki (POSCO); Kwakernaak, C. (TU Delft Team Maria Santofimia Navarro); Brouwer, J.C. (TU Delft Team Marcel Hermans); Westerwaal, Ruud (Tata Steel); Sloof, W.G. (TU Delft Team Kevin Rossi)","","2022","The surface oxidation and wettability of Mn and Si-alloyed steel after annealing at different conditions are studied with scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and a so-called de-wetting method. After exposure at 950 °C for 1 hour in an Ar + 5 vol pct H2 gas atmosphere with dew points (DP) ranging from – 40 °C to 10 °C, oxides were observed along the grain boundaries or dispersed on the surface for the Fe–1.8 Mn steels while a continuous oxides layer was formed on Fe–1.9 Mn–0.94 Si steels (composition in weight fractions). The oxides formed at different DPs were predicted based on thermodynamic calculations. (Fe,Mn)O was formed on Fe–1.8 Mn steel at the whole range of DPs, while the oxide phase on Fe–1.9 Mn–0.94 Si steel depends on the DP. At low-DP SiO2 were formed and with increasing the DP (Fe,Mn)SiO3 or (Fe,Mn)SiO3 + (Fe,Mn)2SiO4 were formed and finally (Fe,Mn)2SiO4 were formed. An increase of the fraction of Fe in the oxide with increasing DP for both steels was observed with XPS analysis. As a measure for the surface wettability, the contact angle of Pb droplets on the annealed steels surfaces was determined with SEM and image analysis software. Also, the contact angle of Pb on pure Fe and on the Mn and Si alloyed steels free of surface oxides was measured for comparison. The results show that the contact angle of Pb on the steel surfaces after annealing decreases with increasing DP. This improved wettability with increasing dew point is related to the Fe fraction of the oxides formed on the surface.","","en","journal article","","","","","","","","","","","Team Kevin Rossi","","",""
"uuid:3d7d5dd8-faf0-477d-9d8b-5ba2188401ed","http://resolver.tudelft.nl/uuid:3d7d5dd8-faf0-477d-9d8b-5ba2188401ed","Framing resilience in public transportation systems, inspired by biomimicry","Gomez Beldarrain, G. (TU Delft Marketing and Consumer Research); Carvajal Ortega, Camilo Andrés (Student TU Delft); Baan, A. (TU Delft Marketing and Consumer Research); Kim, E.Y. (TU Delft Marketing and Consumer Research)","","2022","Resilience is a concept that describes the capability to be restored after unprecedented events, originally emerged from biology and human sciences. This paper aims to explore what a resilient public transportation system is and how nature’s wisdom can be used as an inspiration for the creation of resilience in the area of mobility, by linking public transportation systems, biomimicry and resilience together. To this end, qualitative co-creative workshops were conducted with eleven domain experts from public transportation, biomimicry, and biology. The experts addressed several factors contributing to resilience in public transport that could be categorized into four aggregated dimensions: resilience through system organization, resilience through information management, resilience through operating performance, and resilience through subsystem integration. Finally, a conceptual wheel framework on factors of resilient public transportation systems is proposed, aiming to shed light on future public transport developments, where a systemic perspective is to be adopted.
3 cells/mL. A 0.5–1.5 log increase in bacterial cell concentration was observed at locations in the network. The residual disinfectant was largely dissipated in the network from 0.5 mg/L at the treatment plant to less than 0.1 mg/L in the network locations. The simulative study involving miniature distribution networks, mimicking the dynamics of a distribution network, fed with the RO produced chlorinated and non-chlorinated drinking water revealed that distributing RO produced water without residual disinfection, especially at high water temperatures (25–30 °C), poses a higher chance for water quality change. Within six months of operation of the miniature network fed with unchlorinated RO produced water, the adenosine triphosphate (ATP) and total cell concentration (TCC) in the pipe biofilm were 4 × 102 pg ATP/cm2 and 1 × 107 cells/ cm2. The low bacterial cell concentration and organic carbon concentration in the RO-produced water did not prevent biofilm development inside the network with and without residual chlorine. The bacterial community analysis using 16S ribosomal RNA (rRNA) gene sequencing revealed that mesophilic bacteria with higher temperature tolerance and bacteria associated with oligotrophic, nutrient-poor conditions dominated the biofilm, with no indication of the existence of opportunistic pathogenic species. However, chlorination selected against most bacterial groups and the bacterial community that remained was mainly the bacteria capable of surviving disinfection regimes. Biofilms that developed in the presence of chlorine contained species classified as opportunistic pathogens. These biofilms have an impact on shaping the water quality received at the consumer tap. The presence of these bacteria on its own is not a health risk indicator; viability assessment and qPCRs targeting genes specific to the opportunistic pathogens as well as quantitative microbiological risk assessment (QMRA) should be included to assess the risk. The results from this study highlight the importance of implementing multiple barriers to ensure water safety. Changes in water quality detected even when high-quality disinfected RO-produced water is distributed highlight microbiological challenges that chlorinated systems endure, especially at high water temperatures.","Bacterial regrowth; Disinfection; Distribution network; Opportunistic pathogens; Reverse osmosis produced water","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","BT/Environmental Biotechnology","","",""
"uuid:2d65a571-5ccd-4551-bdc9-7595bccdcc79","http://resolver.tudelft.nl/uuid:2d65a571-5ccd-4551-bdc9-7595bccdcc79","Potential organic matter management for industrial wastewater guidelines using advanced dissolved organic matter characterization tools","Kim, E. (TU Delft BN/Cees Dekker Lab; Sejong University; IHE Delft Institute for Water Education); Park, Ji Won (Sejong University); Noh, Jin Hyung (Sejong University); Bae, Young Ho (Korea Environment Corporation); Maeng, Sung Kyu (Sejong University)","","2022","Since 2021, national standards of South Korea for industrial wastewater discharge to surface water have changed from chemical oxygen demand to total organic carbon for the organic matter. Conventional organic matter parameters (e.g., biochemical oxygen demand, chemical oxygen demand and total organic carbon) are limited means of understanding the behavior of dissolved organic matter in industrial wastewater treatment processes. Thus, the current study used advanced dissolved organic matter characterization tools (e.g., fluorescence excitation emission matrix and size exclusion chromatography-organic carbon detection) to scrutinize industrial wastewater characteristics from three full-scale industrial wastewater treatment plants (IWTPs). The tools were conducive to tracking industrial wastewater sources of total organic carbon, influencing the overall performance of IWTPs, and proposing alternative processes to lower total organic carbon concentration in the effluent. The results of this study suggest that the diagnosis of IWTPs based on dissolved organic matter characteristics could be a useful tool for providing more insight into total organic carbon management.","Chemical oxygen demand; Discharge standards; Industrial wastewater; Total organic carbon","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","BN/Cees Dekker Lab","","",""
"uuid:8ee7a780-5f66-4367-961c-fca3c1309241","http://resolver.tudelft.nl/uuid:8ee7a780-5f66-4367-961c-fca3c1309241","Fundamental thresholds of realistic quantum error correction circuits from classical spin models","Vodola, Davide (University of Bologna; INFN, Bologna); Rispler, M.R.R. (TU Delft QCD/Terhal Group; TU Delft QuTech Advanced Research Centre); Kim, Seyong (Sejong University); Müller, Markus (Forschungszentrum Jülich GmbH; Rheinisch-Westfälische Technische Hochschule)","","2022","Mapping the decoding of quantum error correcting (QEC) codes to classical disordered statistical mechanics models allows one to determine critical error thresholds of QEC codes under phenomenological noise models. Here, we extend this mapping to admit realistic, multi-parameter noise models of faulty QEC circuits, derive the associated strongly correlated classical spin models, and illustrate this approach for a quantum repetition code with faulty stabilizer readout circuits. We use Monte-Carlo simulations to study the resulting phase diagram and benchmark our results against a minimum-weight perfect matching decoder. The presented method provides an avenue to assess fundamental thresholds of QEC circuits, independent of specific decoding strategies, and can thereby help guiding the development of near-term QEC hardware.","","en","journal article","","","","","","","","","","","QCD/Terhal Group","","",""
"uuid:3e30785d-8e9f-4ec0-903e-efb471c9b3e0","http://resolver.tudelft.nl/uuid:3e30785d-8e9f-4ec0-903e-efb471c9b3e0","A shift from chemical oxygen demand to total organic carbon for stringent industrial wastewater regulations: Utilization of organic matter characteristics","Park, Ji Won (Sejong University); Kim, S. (TU Delft BT/Environmental Biotechnology; IHE Delft Institute for Water Education; Sejong University); Noh, Jin Hyung (Sejong University); Bae, Young Ho (Korea Environment Corporation); Lee, Jae Woo (Korea University); Maeng, Sung Kyu","","2022","From 2022, industrial wastewater discharge regulations in South Korea will replace chemical oxygen demand (CODMn) with total organic carbon (TOC). A shift from CODMn to TOC is a pioneering change in protecting water bodies from organic contaminants. However, several industries are struggling to meet these TOC requirements even though their effluents met the CODMn limits. Effluent CODMn/TOC ratios (1.28 ± 0.64) found in our study were lower than the CODMn/TOC coefficients (1.33–1.80) suggested by the Ministry of Environment in South Korea. Aliphatic and particulate organic matter contents in effluents likely influenced the CODMn/TOC ratio. Regardless of the industrial category, dissolved organic carbon often consists of low molecular weight neutrals, hydrophobic organic carbon, and protein-like substances in raw and treated industrial wastewaters. The present study also revealed that TOC and CODMn represented different organic matter fractions in the paper mill and oil refinery wastewater, whereas the industrial park wastewater showed similar dissolved organic matter characteristics. Specifically, CODMn was effective in the determination of humic content in paper mill wastewater but was underestimated in oil refinery wastewater. Additionally, only paper mill effluents exceeded the TOC requirements (4 of 6 samples) and required an additional post-treatment process owing to higher organic loads.","Chemical oxygen demand; Discharge regulation; Dissolved organic matter characteristics; Industrial wastewater; Total organic carbon","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","BT/Environmental Biotechnology","","",""
"uuid:f2e34102-6374-4f3f-981a-8e8a7f9568bf","http://resolver.tudelft.nl/uuid:f2e34102-6374-4f3f-981a-8e8a7f9568bf","Development of deep learning-based joint elements for thin-walled beam structures","Jeon, Jaemin (Seoul National University); Kim, Jaeyong (Seoul National University); Lee, Jong Jun (Seoul National University); Shin, D. (TU Delft Team Georgy Filonenko); Kim, Yoon Young (Seoul National University)","","2022","This study presents a new modeling technique to estimate the stiffness matrix of a thin-walled beam-joint structure using deep learning. When thin-walled beams meet at joints, significant sectional deformations occur, such as warping and distortion. These deformations should be considered in the one-dimensional beam analysis, but it is difficult to explicitly express the coupling relationships between the beams’ deformations connected at the joint. This study constructed a deep learning-based joint model to predict the stiffness matrix of a higher-order one-dimensional super element that presents the relationships. Our proposition trains the neural network using the eigenvalues and eigenvectors of the joint's reduced stiffness matrix to satisfy the correct number of zero-strain energy modes overcoming the randomly perturbed error of the deep learning. The deep learning-based joint model produced compliance errors mostly within 2% for a given structural system and the maximum error of 4% in the worst case. The newly proposed methodology is expected to be widely applicable to structural problems requiring the stiffness of a reduction model.","Deep learning; Eigendecomposition; Finite element analysis; Stiffness matrix","en","journal article","","","","","","","","","","","Team Georgy Filonenko","","",""
"uuid:74104173-86fd-4498-9683-836b11818b95","http://resolver.tudelft.nl/uuid:74104173-86fd-4498-9683-836b11818b95","Effect of solid-solution strengthening on deformation mechanisms and strain hardening in medium-entropy V1-xCrxCoNi alloys","Chung, Hyun (Korea University); Kim, Dae Woong (Pohang University of Science and Technology); Cho, Woo Jin (Seoul National University); Han, Heung Nam (Seoul National University); Ikeda, Yuji (University of Stuttgart; Max-Planck-Institut für Eisenforschung); Ishibashi, Shoji (Max-Planck-Institut für Eisenforschung; National Institute of Advanced Industrial Science and Technology (AIST)); Körmann, F.H.W. (TU Delft Team Marcel Sluiter; Max-Planck-Institut für Eisenforschung); Sohn, Seok Su (Korea University)","","2022","High- and medium-entropy alloys (HEAs and MEAs) possess high solid-solution strength. Numerous investigations have been conducted on its impact on yield strength, however, there are limited reports regarding the relation between solid-solution strengthening and strain-hardening rate. In addition, no attempt has been made to account for the dislocation-mediated plasticity; most works focused on twinning- or transformation-induced plasticity (TWIP or TRIP). In this work we reveal the role of solid-solution strengthening on the strain-hardening rate via systematically investigating evolutions of deformation structures by controlling the Cr/V ratio in prototypical V1-xCrxCoNi alloys. Comparing the TWIP of CrCoNi with the dislocation slip of V0.4Cr0.6CoNi, the hardening rate of CrCoNi was superior to slip-band refinements of V0.4Cr0.6CoNi due to the dynamic Hall-Petch effect. However, as V content increased further to V0.7Cr0.3CoNi and VCoNi, their rate of slip-band refinement in V0.7Cr0.3CoNi and VCoNi with high solid-solution strength surpassed that of CrCoNi. Although it is generally accepted in conventional alloys that deformation twinning results in a higher strain-hardening rate than dislocation-mediated plasticity, we observed that the latter can be predominant in the former under an activated huge solid-solution strengthening effect. The high solid-solution strength lowered the cross-slip activation and consequently retarded the dislocation rearrangement rate, i.e., the dynamic recovery. This delay in the hardening rate decrease, therefore, increased the strain-hardening rate, results in an overall higher strain-hardening rate of V-rich alloys.","Medium-entropy alloy; Solid-solution strength; Stacking fault energy; Strain-hardening rate; Tensile property","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2022-04-30","","","Team Marcel Sluiter","","",""
"uuid:27439387-7f17-4f24-a009-dc8c3cf690db","http://resolver.tudelft.nl/uuid:27439387-7f17-4f24-a009-dc8c3cf690db","Insight on how biopolymers recovered from aerobic granular wastewater sludge can reduce the flammability of synthetic polymers","Kim, Nam Kyeun (The University of Auckland); Lin, Richard (The University of Auckland); Bhattacharyya, Debes (The University of Auckland); van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology); Lin, Y. (TU Delft BT/Environmental Biotechnology)","","2022","Eco-friendly flame retardants are greatly required to meet the expectations of low-toxicity, environmental compatibility and sustainability. Extracellular polymeric substances (EPS), the biopolymers recovered from excess granular wastewater sludge, have been successfully incorporated into poly(vinyl alcohol) (PVA) by a solution casting method. Self-extinguishment of EPS was observed in a vertical burn test. Positive effects of EPS on the reduction of heat release rate and CO emission of EPS/PVA composites were also demonstrated. The presence of various types of phosphates was detected in the EPS and a possible flame-retardant mechanism has been proposed. The investigation of using granular sludge EPS to reduce the flammability of synthetic polymers may open the possibility of converting wastewater sludge into bio phosphorus-based flame retardants.","Biomaterials; Extracellular polymeric substances; Flame retardants; Phosphorus; Wastewater sludge management","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","BT/Environmental Biotechnology","","",""
"uuid:a1244d1a-d755-40fc-a33d-769b3d30f05e","http://resolver.tudelft.nl/uuid:a1244d1a-d755-40fc-a33d-769b3d30f05e","Characterization of Noise in a Single-Molecule Fluorescence Signal","Lee, Jaejin (Sogang University); Kim, S.H. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Se, Tola (Sogang University); Kim, Doseok (Sogang University)","","2022","Single-molecule fluorescence experiments allow monitoring of the structural change and dynamics of a single biomolecule in real time using dye molecules attached to the molecule. Often, the molecules are immobilized on the surface to observe a longer molecular dynamics, yet the finite photon budget available from an individual dye molecule before photobleaching sets the limit to the relatively poor signal-to-noise level. To increase the accuracy of these single-molecule experiments, it is necessary to study the cause of noise in the fluorescence signal from the single molecules. To find the origin of this noise, the lifetime of the fluorescent dye molecules labeled on surface-immobilized DNA was measured by using time-correlation single photon counting. The standard deviation of the fluorescence lifetimes obtained from repeated measurements of a single dye molecule with the total photon number N decreased as 1/N, thus following a shot noise of the Poisson statistics. On the other hand, an additional constant noise source, which is independent of the photon number, was observed from the lifetime uncertainties from many molecules and became more dominant after a certain photon number N. This trend was also followed in the uncertainties of the single-molecule FRET signals obtained from single and many molecules. This additional noise is considered to come from the inhomogeneous environment of each DNA immobilized on the surface.","","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","BN/Chirlmin Joo Lab","","",""
"uuid:92d673e7-5c45-4309-bf87-5c91c56b18e8","http://resolver.tudelft.nl/uuid:92d673e7-5c45-4309-bf87-5c91c56b18e8","Unbiased Photoelectrode Interfaces for Solar Coupling of Lignin Oxidation with Biocatalytic C=C Bond Hydrogenation","Kim, Jinhyun (Korea Advanced Institute of Science and Technology); Um, Yunna (Korea Advanced Institute of Science and Technology); Han, Seunghyun (Ulsan National Institute of Science and Technology); Hilberath, T. (TU Delft BT/Biocatalysis); Kim, Yong Hwan (Ulsan National Institute of Science and Technology); Hollmann, F. (TU Delft BT/Biocatalysis); Park, Chan Beum (Korea Advanced Institute of Science and Technology)","","2022","The pulp and paper manufacturers generate approximately 50 million metric tons of lignin per annum, most of which has been abandoned or incinerated because of lignin's recalcitrant nature. Here, we report bias-free photoelectrochemical (PEC) oxidation of lignin coupled with asymmetric hydrogenation of C=C bonds. The PEC platform consists of a hematite (α-Fe2O3) photoanode and a silicon photovoltaic-wired mesoporous indium tin oxide (Si/mesoITO) photocathode. We substantiate a new function of photoelectroactivated α-Fe2O3 to extract electrons from lignin. The extracted electrons are transferred to the Si/mesoITO photocathode for regenerating synthetic nicotinamide cofactor analogues (mNADHs). We demonstrate that the reduction kinetics of mNAD+s depend on their reduction peak potentials. The regenerated mNADHs activate ene-reductases from the old yellow enzyme (OYE) family, which catalyze enantioselective reduction of α,β-unsaturated hydrocarbons. This lignin-fueled biocatalytic PEC system exhibits an excellent OYE's turnover frequency and total turnover number for photobiocatalytic trans-hydrogenation through cofactor regeneration. This work presents the first example of PEC regeneration of mNADHs and opens up a sustainable route for bias-free chemical synthesis using renewable lignin waste as an electron feedstock.","biocatalysis; hematite; lignin; photoelectrocatalysis; trans-hydrogenation","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2022-08-23","","","BT/Biocatalysis","","",""
"uuid:4081d3a6-8217-4c00-8d2a-a607c26b9438","http://resolver.tudelft.nl/uuid:4081d3a6-8217-4c00-8d2a-a607c26b9438","Recent advances in understanding the flow over bluff bodies with different geometries at moderate Reynolds numbers","Lekkala, Malakonda Reddy (Universiti Teknologi Petronas); Latheef, Mohamed (Universiti Teknologi Petronas); Jung, Jae Hwan (Korea Research Institute of Ships and Ocean Engineering (KRISO)); Coraddu, A. (TU Delft Ship Design, Production and Operations); Zhu, Hongjun (Southwest Petroleum University); Srinil, Narakorn (Newcastle University); Lee, Byung Hyuk (Korea Shipbuilding & Offshore Engineering Co.); Kim, Do Kyun (Seoul National University)","","2022","The application of unsteady incompressible flow phenomenon over the bluff bodies has received the attention of many researchers due to the rich and complex physics underpinning these flows, and thus requiring special attention in their modelling and numerical simulations. The wake that forms at the leeside of the bluff body is of particular interest. Reynolds number and geometry are in turn two prominent parameters that govern the formation and subsequent behaviour of this wake. This paper reviews the wake formations for different cylindrical bluff bodies cross-sections such as circular, elliptical, helically twisted elliptical, symmetric wavy, asymmetric wavy, and harbor seal vibrissae cylinders. Alongside the Reynolds number and geometrical shape, the impacts of rotational rate, aspect ratio, angle of attack, and gap ratio between the cylinder and the bottom wall on the hydrodynamic coefficients, Strouhal number, recirculation length and suppression of vortex shedding in the cylinder wake are investigated. In addition, the variation of hydrodynamic coefficients for different cylindrical shapes are compared. Finally, concluding remarks are drawn based on recent advances in understanding the flow features and predictions with CFD methods.","Biomimetic geometries; Computational fluid dynamics (CFD); Cylinder geometry; Flow around bluff body; Flow characteristics; Hydrodynamic coefficients; Reynolds number; Wake pattern","en","review","","","","","","","","","","","Ship Design, Production and Operations","","",""
"uuid:45263b0a-1839-4907-a526-8963bccf95c7","http://resolver.tudelft.nl/uuid:45263b0a-1839-4907-a526-8963bccf95c7","Weak catch bonds make strong networks","Mulla, Yuval (University of Cologne; AMOLF); Avellaneda, Mario J. (AMOLF; Institute of Science and Technology Austria); Roland, A.P.J. (AMOLF); Baldauf, L. (TU Delft BN/Gijsje Koenderink Lab; Kavli institute of nanoscience Delft; AMOLF); Jung, Wonyeong (Massachusetts Institute of Technology; Purdue University); Kim, Taeyoon; Tans, S.J. (TU Delft BN/Sander Tans Lab; Systems Biophysics; Kavli institute of nanoscience Delft); Koenderink, G.H. (TU Delft BN/Gijsje Koenderink Lab; Systems Biophysics; Kavli institute of nanoscience Delft)","","2022","Molecular catch bonds are ubiquitous in biology and essential for processes like leucocyte extravasion1 and cellular mechanosensing2. Unlike normal (slip) bonds, catch bonds strengthen under tension. The current paradigm is that this feature provides ‘strength on demand3’, thus enabling cells to increase rigidity under stress1,4–6. However, catch bonds are often weaker than slip bonds because they have cryptic binding sites that are usually buried7,8. Here we show that catch bonds render reconstituted cytoskeletal actin networks stronger than slip bonds, even though the individual bonds are weaker. Simulations show that slip bonds remain trapped in stress-free areas, whereas weak binding allows catch bonds to mitigate crack initiation by moving to high-tension areas. This ‘dissociation on demand’ explains how cells combine mechanical strength with the adaptability required for shape change, and is relevant to diseases where catch bonding is compromised7,9, including focal segmental glomerulosclerosis10 caused by the α-actinin-4 mutant studied here. We surmise that catch bonds are the key to create life-like materials.","","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","BN/Gijsje Koenderink Lab","","",""
"uuid:ba3052b8-4e48-49aa-9754-c51ab961c002","http://resolver.tudelft.nl/uuid:ba3052b8-4e48-49aa-9754-c51ab961c002","What cities have is how people travel: Conceptualizing a data-mining-driven modal split framework","Lee, Sujin (Korea Advanced Institute of Science and Technology); Lee, Jinwoo (Korea Advanced Institute of Science and Technology); Hiemstra-van Mastrigt, S. (TU Delft Responsible Marketing and Consumer Behavior); Kim, E.Y. (TU Delft Responsible Marketing and Consumer Behavior)","","2022","As city-level modal splits are outcomes of city functions, it is essential to understand whether and how city attributes affect modal splits to derive a modal shift toward low-emission travel modes and sustainable mobility in cities. This study elucidates this relationship between modal splits and city attributes in 46 cities worldwide, proposing a two-step data mining framework. First, using the K-Means method, we classify cities into private-vehicle-, public-transit-, and bicycle-dominant groups based on their modal splits. Second, we categorize city attributes into environmental, socio-demographic, and transportation planning factors and quantify their interlocked impacts on cities' modal splits via the decision tree method. We observe that the socio-demographic factor has the highest impact on determining the cities' modal splits. In addition, high population density and employment rate are positively associated with low-emission travel modes. High gasoline tax and low public transit and taxi fares often make people reconsider possessing private vehicles. On the other hand, extreme weather conditions (e.g., hot temperatures) can prevent bicycle usage. Our contribution expands the impact of introduced city planning and policies for modal shifts toward a real-world paradigm and we present implications of the proposed framework in developing practical modal shift strategies.","Data mining; Data-driven decision making; Modal split; Mode choice; Sustainable mobility","en","journal article","","","","","","","","","","","Responsible Marketing and Consumer Behavior","","",""
"uuid:4b8780ae-8916-4e64-a383-cc6e09b957a8","http://resolver.tudelft.nl/uuid:4b8780ae-8916-4e64-a383-cc6e09b957a8","Nanoscale Electrical Probes on a Single Facet of a ZnO Microwire: Device Fabrication and Local Electrical Characteristics","Yun, Yoojoo (Pusan National University); Shin, D. (TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft); Kim, Hakseong (Korea Research Institute of Standards and Science, Daejon); Choi, Jun Hee (Defense Agency for Technology and Quality, Jinju); Jeong, Hyunjeong (Ewha Womans University); Suh, Dongseok (Sungkyunkwan University); Kang, Haeyong (Pusan National University); Lee, S. (Ewha Womans University)","","2022","The electrical properties of a single facet of an individual ZnO microwire were investigated. Electrode patterns with a Hall bar structure were deposited on the surface of the top facet of the ZnO microwire. Using a suspended and cross-linked poly(methyl methacrylate) ribbon structure, it was possible to define the electrical connections only at the top surface, while avoiding those on the other five sides of the ZnO microwire. Current-voltage characteristics were examined, and Hall measurements were conducted with various magnetic fields. Through our device structure, the electrical properties could be directly probed at specific points on the ZnO surface in a reliable manner. The estimated electrical characteristics demonstrate that the carrier concentration and mobility of the ZnO surface varied along the axial direction of the wire. These results indicate that the charge carrier concentration on the surface of the micro-/nanowire can be sensitively changed according to the synthesis environment. In addition, it is worth noting that the nanoscale local Hall probes, fabricated by our technique, could probe the very slight variation of carrier concentration, which is difficult to detect by a standard transport measurement along the wire.","carrier density; Hall measurement; nanoscale local Hall probes; PMMA cross-link; single-facet electrode structure; ZnO microwire","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","QN/Steeneken Lab","","",""
"uuid:0e547d8a-86fa-48bc-b7b1-de6b321ecec3","http://resolver.tudelft.nl/uuid:0e547d8a-86fa-48bc-b7b1-de6b321ecec3","Identification of nosZ-expressing microorganisms consuming trace N2O in microaerobic chemostat consortia dominated by an uncultured Burkholderiales","Kim, Daehyun D. (Korea Advanced Institute of Science and Technology); Han, Heejoo (Korea Advanced Institute of Science and Technology); Yun, Taeho (Korea Advanced Institute of Science and Technology); Song, Min Joon (Korea Advanced Institute of Science and Technology); Terada, Akihiko (Tokyo University of Agriculture and Technology); Laureni, M. (TU Delft Sanitary Engineering); Yoon, Sukhwan (Korea Advanced Institute of Science and Technology)","","2022","Microorganisms possessing N2O reductases (NosZ) are the only known environmental sink of N2O. While oxygen inhibition of NosZ activity is widely known, environments where N2O reduction occurs are often not devoid of O2. However, little is known regarding N2O reduction in microoxic systems. Here, 1.6-L chemostat cultures inoculated with activated sludge samples were sustained for ca. 100 days with low concentration (<2 ppmv) and feed rate (<1.44 µmoles h−1) of N2O, and the resulting microbial consortia were analyzed via quantitative PCR (qPCR) and metagenomic/metatranscriptomic analyses. Unintended but quantified intrusion of O2 sustained dissolved oxygen concentration above 4 µM; however, complete N2O reduction of influent N2O persisted throughout incubation. Metagenomic investigations indicated that the microbiomes were dominated by an uncultured taxon affiliated to Burkholderiales, and, along with the qPCR results, suggested coexistence of clade I and II N2O reducers. Contrastingly, metatranscriptomic nosZ pools were dominated by the Dechloromonas-like nosZ subclade, suggesting the importance of the microorganisms possessing this nosZ subclade in reduction of trace N2O. Further, co-expression of nosZ and ccoNO/cydAB genes found in the metagenome-assembled genomes representing these putative N2O-reducers implies a survival strategy to maximize utilization of scarcely available electron acceptors in microoxic environmental niches.","","en","journal article","","","","","","","","","","","Sanitary Engineering","","",""
"uuid:dfa1857a-0328-49a6-8f60-3c1943f6891b","http://resolver.tudelft.nl/uuid:dfa1857a-0328-49a6-8f60-3c1943f6891b","Deformation and strain limits for IPB-loaded high strength steel CHS joints","Kim, Seon Hu (Seoul National University); Lee, Cheol Ho (Seoul National University); Han, Sang Hui (Dongyang Structural Engineers Group); Wardenier, J. (TU Delft Steel & Composite Structures)","","2022","In this study, existing deformation limits are first re-examined to investigate if they can be rationally extended to high strength steel circular hollow section (CHS) joints that are subjected to in-plane bending (IPB) moment. It is pointed out that existing deformation limits, which have been developed and validated primarily for mild steel joints, need to be modified when high strength steels are involved. By noting that the ductility of IPB-loaded joints can be significantly reduced with the use of high strength steel, a new deformation limit is proposed which allows less deformation to less ductile high strength steel joints. The deformation limit, proposed in terms of joint rotation angle, is validated both numerically and experimentally. In addition, a recently proposed strain limit criterion is also discussed. To provide a guide for obtaining converged strain from finite element (FE) analysis, mesh sensitivity study is comprehensively conducted. It is shown that the element size required for the convergence of strain is substantially smaller than that required for obtaining satisfactory global response such as joint load-deformation relationship. By applying a systematic FE modeling strategy, numerical investigation is made to check the feasibility of the 5% strain limit criterion which has recently been advocated by the revised draft of ISO 14346. While the limiting principal strain of 5% is shown to be reasonable for CHS-to-CHS joints loaded by IPB, for longitudinal branch plate-to-CHS joints, a lower limiting strain appears more appropriate.","Circular hollow section (CHS); Deformation limit; Experiment; Finite element (FE); High-strength steel; Hollow section joint; In-plane bending (IPB)","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","Steel & Composite Structures","","",""
"uuid:7697bcc1-fe9c-4b8a-a6e1-f2a93c99683d","http://resolver.tudelft.nl/uuid:7697bcc1-fe9c-4b8a-a6e1-f2a93c99683d","Condensin-driven loop extrusion on supercoiled DNA","Kim, E. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Martin Gonzalez, A. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Pradhan, B. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); van der Torre, J. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft)","","2022","Condensin, a structural maintenance of chromosomes (SMC) complex, has been shown to be a molecular motor protein that organizes chromosomes by extruding loops of DNA. In cells, such loop extrusion is challenged by many potential conflicts, for example, the torsional stresses that are generated by other DNA-processing enzymes. It has so far remained unclear how DNA supercoiling affects loop extrusion. Here, we use time-lapse single-molecule imaging to study condensin-driven DNA loop extrusion on supercoiled DNA. We find that condensin binding and DNA looping are stimulated by positively supercoiled DNA, and condensin preferentially binds near the tips of supercoiled plectonemes. Upon loop extrusion, condensin collects nearby plectonemes into a single supercoiled loop that is highly stable. Atomic force microscopy imaging shows that condensin generates supercoils in the presence of ATP. Our findings provide insight into the topology-regulated loading and formation of supercoiled loops by SMC complexes and clarify the interplay of loop extrusion and supercoiling.","","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","BN/Cees Dekker Lab","","",""
"uuid:f177de1e-892c-4aa4-81c7-80882cff03bb","http://resolver.tudelft.nl/uuid:f177de1e-892c-4aa4-81c7-80882cff03bb","pLUTo: Enabling Massively Parallel Computation in DRAM via Lookup Tables","Ferreira, Joao Dinis (ETH Zürich); Falcao, Gabriel (Universidade de Coimbra); Gomez-Luna, Juan (ETH Zürich); Alser, Mohammed (ETH Zürich); Orosa, Lois (ETH Zürich); Sadrosadati, Mohammad (ETH Zürich); Kim, Jeremie S. (ETH Zürich); Oliveira, Geraldo F. (ETH Zürich); Shahroodi, T. (TU Delft Computer Engineering)","","2022","Data movement between the main memory and the processor is a key contributor to execution time and energy consumption in memory-intensive applications. This data movement bottleneck can be alleviated using Processing-in-Memory (PiM). One category of PiM is Processing-using-Memory (PuM), in which computation takes place inside the memory array by exploiting intrinsic analog properties of the memory device. PuM yields high performance and energy efficiency, but existing PuM techniques support a limited range of operations. As a result, current PuM architectures cannot efficiently perform some complex operations (e.g., multiplication, division, exponentiation) without large increases in chip area and design complexity. To overcome these limitations of existing PuM architectures, we introduce pLUTo (processing-using-memory with lookup table (LUT) operations), a DRAM-based PuM architecture that leverages the high storage density of DRAM to enable the massively parallel storing and querying of lookup tables (LUTs). The key idea of pLUTo is to replace complex operations with low-cost, bulk memory reads (i.e., LUT queries) instead of relying on complex extra logic. We evaluate pLUTo across 11 real-world workloads that showcase the limitations of prior PuM approaches and show that our solution outperforms optimized CPU and GPU base-lines by an average of 713 × and 1.2 ×, respectively, while simultaneously reducing energy consumption by an average of 1855 × and 39.5 ×. Across these workloads, pLUTo outperforms state-of-the-art PiM architectures by an average of 18.3 ×. We also show that different versions of pLUTo provide different levels of flexibility and performance at different additional DRAM area overheads (between 10.2% and 23.1%). pLUTo's source code and all scripts required to reproduce the results of this paper are openly and fully available at https://github.com/CMU-SAFARI/pLUTo.","","en","conference paper","IEEE","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","Computer Engineering","","",""
"uuid:7e64839d-17a6-430c-b30e-3a57eadafe1e","http://resolver.tudelft.nl/uuid:7e64839d-17a6-430c-b30e-3a57eadafe1e","Transit Time Estimation in Catchments: Recent Developments and Future Directions","Benettin, Paolo (Swiss Federal Institute of Technology); Rodriguez, Nicolas B. (INRAE); Sprenger, Matthias (Lawrence Berkeley National Laboratory); Kim, Minseok (Pusan National University); Klaus, Julian (Universität Bonn); Harman, Ciaran J. (Johns Hopkins University); van der Velde, Ype (Vrije Universiteit Amsterdam); Hrachowitz, M. (TU Delft Water Resources); Botter, Gianluca (Università degli Studi di Padova)","","2022","Water transit time is now a standard measure in catchment hydrological and ecohydrological research. The last comprehensive review of transit time modeling approaches was published 15+ years ago. But since then the field has largely expanded with new data, theory and applications. Here, we review these new developments with focus on water-age-balance approaches and data-based approaches. We discuss and compare methods including StorAge-Selection functions, well/partially mixed compartments, water age tracking through spatially distributed models, direct transit time estimates from controlled experiments, young water fractions, and ensemble hydrograph separation. We unify some of the heterogeneity in the literature that has crept in with these many new approaches, in an attempt to clarify the key differences and similarities among them. Finally, we point to open questions in transit time research, including what we still need from theory, models, field work, and community practice.","catchment; review; tracer; transit time; transport; water age","en","review","","","","","","","","","","","Water Resources","","",""
"uuid:64e04b9f-be39-40c4-a611-ac728710ece4","http://resolver.tudelft.nl/uuid:64e04b9f-be39-40c4-a611-ac728710ece4","Light-driven biocatalytic oxidation","Yun, Chul Ho (Chonnam National University, Yeosu); Kim, Jinhyun (Korea Advanced Institute of Science and Technology); Hollmann, F. (TU Delft BT/Biocatalysis); Park, Chan Beum (Korea Advanced Institute of Science and Technology)","","2022","Enzymes are the catalyst of choice for highly selective reactions, offering nature-inspired approaches for sustainable chemical synthesis. Oxidative enzymes (e.g., monooxygenases, peroxygenases, oxidases, or dehydrogenases) catalyze a variety of enantioselective oxyfunctionalization and dehydrogenation reactions under mild conditions. To sustain the catalytic cycles of these enzymes, constant supply with or withdrawal of reducing equivalents (electrons) is required. Being redox by nature, photocatalysis appears a ‘natural choice’ to accomplish the electron-relay role, and many photoenzymatic oxidation reactions have been developed in the past years. In this contribution, we critically summarize the current developments in photoredoxbiocatalysis, highlight some promising concepts but also discuss the current limitations.","","en","review","","","","","","","","","","","BT/Biocatalysis","","",""
"uuid:fad5a828-9173-4bdd-9fb4-9512d8ce7e53","http://resolver.tudelft.nl/uuid:fad5a828-9173-4bdd-9fb4-9512d8ce7e53","Let's Negotiate with Automation: How can Humans and HMIs Negotiate Disagreement on Automated Vehicles?","Kim, S. (TU Delft Human Information Communication Design); van Grondelle, E.D. (TU Delft Design Aesthetics); van Zeumeren, I.M. (TU Delft Design Aesthetics); Mirnig, Alexander G. (University of Salzburg); Stojmenova, Kristina (University of Ljubljana)","","2022","In automated vehicles, the driver and the vehicle make a decision on the driving. However, there is no guarantee that drivers always agree or follow the system's decision. Drivers can reject the system's proposal or regain control, and it reduces the usefulness of automated vehicles. When a decision conflict happens, the vehicle can negotiate with the driver. Human-human communication depends on the individual's attitude and situation. Similarly, the negotiation style needs to differ depending on the context of conflict and the cause of disagreement. In this workshop, we address the negotiation approach to designing HMI and discuss considerations for applying the human-human negotiation style to human-automated vehicle interaction design. HMI design using a negotiation approach can address the decision conflict between humans and automation and expect enhancing trust and acceptance.","Automated driving; Design thinking; Human-machine interaction; Negotiation","en","conference paper","Association for Computing Machinery (ACM)","","","","","Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","Human Information Communication Design","","",""
"uuid:554bbfe8-02be-4527-96d3-e70b979d1b98","http://resolver.tudelft.nl/uuid:554bbfe8-02be-4527-96d3-e70b979d1b98","SMC complexes can traverse physical roadblocks bigger than their ring size","Pradhan, B. (TU Delft BN/Cees Dekker Lab; TU Delft BN/Bionanoscience; Kavli institute of nanoscience Delft); Barth, R. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Kim, E. (TU Delft BN/Cees Dekker Lab; TU Delft BN/Bionanoscience; Kavli institute of nanoscience Delft); van Laar, T. (TU Delft BN/Nynke Dekker Lab; Kavli institute of nanoscience Delft); Yang, W.W.W. (TU Delft BN/Cees Dekker Lab; TU Delft BN/Bionanoscience; Kavli institute of nanoscience Delft); Ryu, J.K. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); van der Torre, J. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Peters, Jan Michael (Research Institute of Molecular Pathology, Vienna); Dekker, C. (TU Delft BN/Cees Dekker Lab; TU Delft BN/Bionanoscience; Kavli institute of nanoscience Delft)","","2022","Ring-shaped structural maintenance of chromosomes (SMC) complexes like condensin and cohesin extrude loops of DNA. It remains, however, unclear how they can extrude DNA loops in chromatin that is bound with proteins. Here, we use in vitro single-molecule visualization to show that nucleosomes, RNA polymerase, and dCas9 pose virtually no barrier to loop extrusion by yeast condensin. We find that even DNA-bound nanoparticles as large as 200 nm, much bigger than the SMC ring size, also translocate into DNA loops during extrusion by condensin and cohesin. This even occurs for a single-chain version of cohesin in which the ring-forming subunits are covalently linked and cannot open to entrap DNA. The data show that SMC-driven loop extrusion has surprisingly little difficulty in accommodating large roadblocks into the loop. The findings also show that the extruded DNA does not pass through the SMC ring (pseudo)topologically, hence pointing to a nontopological mechanism for DNA loop extrusion.","cohesin; condensin; CP: Molecular biology; dCas9; DNA loop extrusion; mechanism; nucleosomes; RNA polymerase; roadblocks; SMC; topology","en","journal article","","","","","","","","","","BN/Bionanoscience","BN/Cees Dekker Lab","","",""
"uuid:7de78c43-6d16-43c1-afad-f6ab81b7b395","http://resolver.tudelft.nl/uuid:7de78c43-6d16-43c1-afad-f6ab81b7b395","Lindblad Tomography of a Superconducting Quantum Processor","Samach, Gabriel O. (Massachusetts Institute of Technology); Greene, Ami (Massachusetts Institute of Technology); Borregaard, J. (TU Delft QN/Borregaard groep; Kavli institute of nanoscience Delft; University of Copenhagen); Christandl, Matthias (University of Copenhagen); Barreto, Joseph (Student TU Delft; Kavli institute of nanoscience Delft); Kim, David K. (Massachusetts Institute of Technology); McNally, Christopher M. (Massachusetts Institute of Technology); Melville, Alexander (Massachusetts Institute of Technology); Niedzielski, Bethany M. (Massachusetts Institute of Technology)","","2022","As progress is made towards the first generation of error-corrected quantum computers, robust characterization and validation protocols are required to assess the noise environments of physical quantum processors. While standard coherence metrics and characterization protocols such as T1 and T2, process tomography, and randomized benchmarking are now ubiquitous, these techniques provide only partial information about the dynamic multiqubit loss channels responsible for processor errors, which can be described more fully by a Lindblad operator in the master equation formalism. Here, we introduce and experimentally demonstrate Lindblad tomography, a hardware-agnostic characterization protocol for tomographically reconstructing the Hamiltonian and Lindblad operators of a quantum noise environment from an ensemble of time-domain measurements. Performing Lindblad tomography on a small superconducting quantum processor, we show that this technique naturally builds on standard process tomography and T1/T2 measurement protocols, characterizes and accounts for state-preparation and measurement errors, and allows one to place bounds on the fit to a Markovian model. Comparing the results of single- and two-qubit measurements on a superconducting quantum processor, we demonstrate that Lindblad tomography can also be used to identify and quantify sources of crosstalk on quantum processors, such as the presence of always-on qubit-qubit interactions.","","en","journal article","","","","","","","","","","","QN/Borregaard groep","","",""
"uuid:b36d06fc-287e-49a8-9612-9e32442b96cc","http://resolver.tudelft.nl/uuid:b36d06fc-287e-49a8-9612-9e32442b96cc","Statistical Detection of Adversarial examples in Blockchain-based Federated Forest In-vehicle Network Intrusion Detection Systems","Aliyu, Ibrahim; van Engelenburg, S.H. (TU Delft Information and Communication Technology); Mu'azu, Muhammed Bashir (Ahmadu Bello University); Kim, Jinsul; Lim, Chang Gyoon","","2022","The internet-of-Vehicle (IoV) can facilitate seamless connectivity between connected vehicles (CV), autonomous vehicles (AV), and other IoV entities. Intrusion Detection Systems (IDSs) for IoV networks can rely on machine learning (ML) to protect the in-vehicle network from cyber-attacks. Blockchain-based Federated Forests (BFFs) could be used to train ML models based on data from IoV entities while protecting the confidentiality of the data and reducing the risks of tampering with the data. However, ML models are still vulnerable to evasion, poisoning and exploratory attacks by adversarial examples. The BFF-IDS offers partial defence against poisoning but has no measure for evasion attacks, the most common attack/threat faced by ML models. Besides, the impact of adversarial examples transferability in CAN IDS has largely remained untested. This paper investigates the impact of various possible adversarial examples on the BFF-IDS. We also investigated the statistical adversarial detector's effectiveness and resilience in detecting the attacks and subsequent countermeasures by augmenting the model with detected samples. Our investigation results established that BFF-IDS is very vulnerable to adversarial examples attacks. The statistical adversarial detector and the subsequent BFF-IDS augmentation (BFF-IDS(AUG)) provide an effective mechanism against the adversarial examples. Consequently, integrating the statistical adversarial detector and the subsequent BFF-IDS augmentation with the detected adversarial samples provides a sustainable security framework against adversarial examples and other unknown attacks.","Adversarial examples; Artificial Intelligent (AI); Blockchain; Controller Area Network (CAN); Federated Learning; Intrusion detection system (IDS)","en","journal article","","","","","","","","","","","Information and Communication Technology","","",""
"uuid:66a6b145-9370-49ec-864f-95c1ff470563","http://resolver.tudelft.nl/uuid:66a6b145-9370-49ec-864f-95c1ff470563","OC6 Phase Ia: CFD Simulations of the Free-Decay Motion of the DeepCwind Semisubmersible","Wang, Lu (National Renewable Energy Laboratory); Robertson, Amy (National Renewable Energy Laboratory); Jonkman, Jason (National Renewable Energy Laboratory); Kim, Jang (Front Energies); Shen, Zhi‐Rong (Front Energies); Koop, Arjen (Maritime Research Institute Netherlands (MARIN)); Chandramouli, P. (TU Delft Wind Energy); Viré, A.C. (TU Delft Wind Energy); Ramesh Reddy, L. (TU Delft Wind Energy)","","2022","Currently, the design of floating offshore wind systems is primarily based on mid-fidelity models with empirical drag forces. The tuning of the model coefficients requires data from either experiments or high-fidelity simulations. As part of the OC6 (Offshore Code Comparison Collaboration, Continued, with Correlation, and unCertainty (OC6) is a project under the International Energy Agency Wind Task 30 framework) project, the present investigation explores the latter option. A verification and validation study of computational fluid dynamics (CFD) models of the DeepCwind semisubmersible undergoing free-decay motion is performed. Several institutions provided CFD results for validation against the OC6 experimental campaign. The objective is to evaluate whether the CFD setups of the participants can provide valid estimates of the hydrodynamic damping coefficients needed by mid-fidelity models. The linear and quadratic damping coefficients and the equivalent damping ratio are chosen as metrics for validation. Large numerical uncertainties are estimated for the linear and quadratic damping coefficients; however, the equivalent damping ratios are more consistently predicted with lower uncertainty. Some difference is observed between the experimental and CFD surge-decay motion, which is caused by mechanical damping not considered in the simulations that likely originated from the mooring setup, including a Coulomb-friction-type force. Overall, the simulations and the experiment show reasonable agreement, thus demonstrating the feasibility of using CFD simulations to tune mid-fidelity models.","CFD; validation; free decay; offshore wind; semisubmersible; uncertainty; OC6; IEA; Free decay; Validation; Uncertainty; Semisubmersible; Offshore wind","en","journal article","","","","","","","","","","","Wind Energy","","",""
"uuid:3f5330ea-f02b-4041-bbee-d9eab8f18a3e","http://resolver.tudelft.nl/uuid:3f5330ea-f02b-4041-bbee-d9eab8f18a3e","A Tiled Ultrasound Matrix Transducer for Volumetric Imaging of the Carotid Artery","Simoes dos Santos, D. (TU Delft ImPhys/Verweij group; TU Delft ImPhys/Medical Imaging); Fool, F. (TU Delft ImPhys/Verweij group); Mozaffarzadeh, M. (TU Delft ImPhys/Verweij group); Shabanimotlagh, M. (TU Delft ImPhys/Medical Imaging); Noothout, E.C. (TU Delft ImPhys/Verweij group); Kim, T. (TU Delft Electronic Instrumentation); Rozsa, N.N.M. (TU Delft Electronic Instrumentation); Vos, H.J. (TU Delft ImPhys/Verweij group; Erasmus MC); Bosch, Johan G. (Erasmus MC); Pertijs, M.A.P. (TU Delft Electronic Instrumentation); Verweij, M.D. (TU Delft ImPhys/Medical Imaging; TU Delft ImPhys/Verweij group; Erasmus MC); de Jong, N. (TU Delft ImPhys/De Jong group; Erasmus MC)","","2022","High frame rate three-dimensional (3D) ultrasound imaging would offer excellent possibilities for the accurate assessment of carotid artery diseases. This calls for a matrix transducer with a large aperture and a vast number of elements. Such a matrix transducer should be interfaced with an application-specific integrated circuit (ASIC) for channel reduction. However, the fabrication of such a transducer integrated with one very large ASIC is very challenging and expensive. In this study, we develop a prototype matrix transducer mounted on top of multiple identical ASICs in a tiled configuration. The matrix was designed to have 7680 piezoelectric elements with a pitch of 300 μm × 150 μm integrated with an array of 8 × 1 tiled ASICs. The performance of the prototype is characterized by a series of measurements. The transducer exhibits a uniform behavior with the majority of the elements working within the −6 dB sensitivity range. In transmit, the individual elements show a center frequency of 7.5 MHz, a −6 dB bandwidth of 45%, and a transmit efficiency of 30 Pa/V at 200 mm. In receive, the dynamic range is 81 dB, and the minimum detectable pressure is 60 Pa per element. To demonstrate the imaging capabilities, we acquired 3D images using a commercial wire phantom.","application-specific integrated circuit (ASIC); carotid artery; high-frame rate; lead zirconate titanate (PZT); matrix array; three-dimensional (3D); ultrasound imaging; ultrasound transducer","en","journal article","","","","","","","","","","","ImPhys/Verweij group","","",""
"uuid:dee2018f-1463-4984-abd0-bca3657ef9d4","http://resolver.tudelft.nl/uuid:dee2018f-1463-4984-abd0-bca3657ef9d4","Automated Characterization of Matrix Transducer Arrays using the Verasonics Imaging System","Simoes dos Santos, D. (TU Delft ImPhys/Medical Imaging); Fool, F. (TU Delft ImPhys/Medical Imaging); Kim, Taehoon (External organisation); Noothout, E.C. (TU Delft ImPhys/Medical Imaging); Rozsa, N.N.M. (TU Delft Electronic Instrumentation); Vos, H.J. (TU Delft ImPhys/Medical Imaging; Erasmus MC); Bosch, Johan G. (Erasmus MC); Pertijs, M.A.P. (TU Delft Electronic Instrumentation); Verweij, M.D. (Erasmus MC); De Jona, Nico (Erasmus MC)","","2022","Over the past decades, ultrasound imaging has made considerable progress based on the advancement of imaging systems as well as transducer technology. With the need for advanced transducer arrays with complex designs and technical requirements, there is also a need for suitable tools to characterize such transducers. However, despite the importance of acoustic characterization to assess the performance of novel transducer arrays, the characterization process of highly complex transducers might involve various manual steps, which are laborious, time-consuming, and subject to errors. These factors can hinder the full characterization of a prototype transducer, leading to an under-representation or inadequate evaluation. To come to an extensive, high-quality evaluation of a prototype transducer, the acoustic characterization of each transducer element is indispensable in both transmit and receive operations. In this paper, we propose a pipeline to automatically perform the acoustic characterization of a matrix transducer using a research imaging system. The performance of the pipeline is tested on a prototype matrix transducer consisting of 960 elements. The results show that the proposed pipeline is capable of performing the complete acoustic characterization of a high-element count transducer in a fast and convenient way.","acoustic characterization; automated; matrix array; research imaging system; ultrasound transducer; Verasonics","en","conference paper","IEEE","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2023-07-01","","","ImPhys/Medical Imaging","","",""
"uuid:6485898b-a36b-41b4-a958-b917339a7ef9","http://resolver.tudelft.nl/uuid:6485898b-a36b-41b4-a958-b917339a7ef9","The power of deep without going deep? A study of HDPGMM music representation learning","Kim, Jaehun (TU Delft Multimedia Computing); Liem, C.C.S. (TU Delft Multimedia Computing)","","2022","In the previous decade, Deep Learning (DL) has proven to be one of the most effective machine learning methods to tackle a wide range of Music Information Retrieval (MIR) tasks. It offers highly expressive learning capacity that can fit any music representation needed for MIR-relevant downstream tasks. However, it has been criticized for sacrificing interpretability. On the other hand, the Bayesian nonparametric (BN) approach promises similar positive properties as DL, such as high flexibility, while being robust to overfitting and preserving interpretability. Therefore, the primary motivation of this work is to explore the potential of Bayesian nonparametric models in comparison to DL models for music representation learning. More specifically, we assess the music representation learned from the Hierarchical Dirichlet Process Gaussian Mixture Model (HDPGMM), an infinite mixture model based on the Bayesian nonparametric approach, to MIR tasks, including classification, auto-tagging, and recommendation. The experimental result suggests that the HDPGMM music representation can outperform DL representations in certain scenarios, and overall comparable.","","en","conference paper","","","","","","","","","","","Multimedia Computing","","",""
"uuid:60fc9bcf-c230-4313-a207-65f24ed9172c","http://resolver.tudelft.nl/uuid:60fc9bcf-c230-4313-a207-65f24ed9172c","Points of Interest (POI): a commentary on the state of the art, challenges, and prospects for the future","Psyllidis, A. (TU Delft Internet of Things); Gao, Song (University of Wisconsin-Madison); Hu, Yingjie (University at Buffalo (UB)); Kim, Eun-Kyeong (University of Zürich); McKenzie, Grant (McGill University); Purves, Ross (University of Zürich); Yuan, May (University of Texas at Dallas); Andris, Clio (Georgia Institute of Technology)","","2022","In this commentary, we describe the current state of the art of points of interest (POIs) as digital, spatial datasets, both in terms of their quality and affordings, and how they are used across research domains. We argue that good spatial coverage and high-quality POI features — especially POI category and temporality information — are key for creating reliable data. We list challenges in POI geolocation and spatial representation, data fidelity, and POI attributes, and address how these challenges may affect the results of geospatial analyses of the built environment for applications in public health, urban planning, sustainable development, mobility, community studies, and sociology. This commentary is intended to shed more light on the importance of POIs both as standalone spatial datasets and as input to geospatial analyses.","Points of Interest; spatial data; geographic representation; place","en","journal article","","","","","","","","","","","Internet of Things","","",""
"uuid:077fe492-48ec-49e1-8c42-c8c4fbf7cea7","http://resolver.tudelft.nl/uuid:077fe492-48ec-49e1-8c42-c8c4fbf7cea7","A consistently-scaled frequency domain nonlinear mild-slope equation model for surface wave propagation","Kim, I.-C. (Texas A&M University, USA); Kaihatu, J.M. (Texas A&M University, USA)","","2021","As surface waves propagate from deep water toward shallow coastal areas, their ensuing transformation is due to the influence of bathymetry and several important phenomena, such as refraction, shoaling ,and nonlinear effects. Nonlinear wave models based on the classical Boussinesq equation(Peregrine, 1967)have evidenced good performance in shallow water (e.g.,Freilich and Guza, 1984) but do not compare well with data when outside the shallow water range due to the weakly dispersion relation and the shoaling mechanism by Green’s law. To improve the Boussinesq-type equation with a wider dispersive range, many studies suggested extended Boussinesq equations in both time domain (e.g.,Madsen et al.,1991) and frequency-domain (e.g., Madsen and Sørensen, 1993).The models have usually been developed with more representative expressions for linear dispersion in deep water instead of the weakly dispersive relations of the classical Boussinesq equation. Alternatively, frequency-domain models based on nonlinear extensions of the mild-slope equation have shown improved results in intermediate depths (e.g.,Kaihatu and Kirby, 1995) but which can show problematic behavior in deeper water due to the size of the phase mismatches (phase differences among interacting wave components which can impact the strength of wave-wave interactions) among highly-dispersive waves. These models are usually derived by extending the mild-slope equation of Berkhoff (1973) and including weak nonlinearity in the equations. Kaihatu and Kirby (1995) used the method of Smith and Sprinks (1975) (i.e., Green’s second identity) to develop the nonlinear mild-slope equation models in the frequency domain inthe form of a parabolic equation. In the present study, we re-examine the model of Kaihatu and Kirby (1995) via a consistent scaling to properly balance nonlinear effects with bathymetric variations, and as a result, add both nonlinear diffraction effects to the model and ameliorative effects to the phase mismatch terms. Also, we compare the amplitudes of wave harmonics from the laboratory measurement with those computed by both the present model and several previous models to demonstrate how the newly added nonlinear terms in the present model have an impact on the numerical results.","Coastal management and risk assessments; Coastal hydrodynamics (waves, tides and surges)","en","conference paper","","","","","","","","","","","","","",""
"uuid:01ba927d-28e7-4abd-8193-e4ebef3b8218","http://resolver.tudelft.nl/uuid:01ba927d-28e7-4abd-8193-e4ebef3b8218","Increasing trust in complex machine learning systems: Studies in the music domain","Kim, Jaehun (TU Delft Multimedia Computing)","Hanjalic, A. (promotor); Liem, C.C.S. (copromotor); Delft University of Technology (degree granting institution)","2021","Machine learning (ML) has become a core technology for many real-world applications. Modern ML models are applied to unprecedentedly complex and difficult challenges, including very large and subjective problems. For instance, applications towards multimedia understanding have been advanced substantially. Here, it is already prevalent that cultural/artistic objects such as music and videos are analyzed and served to users according to their preference, enabled throughML techniques.
One of the most recent breakthroughs in ML is Deep Learning (DL), which has been immensely adopted to tackle such complex problems. DL allows for higher learning capacity, making end-to-end learning possible, which reduces the need for substantial engineering effort, while achieving high effectiveness. At the same time, this also makes DL models more complex than conventional ML models. Reports in several domains indicate that such more complex ML models may have potentially critical hidden problems: various biases embedded in the training data can emerge in the prediction, extremely sensitive models can make unaccountable mistakes. Furthermore, the black-box nature of the DL models hinders the interpretation of the mechanisms behind them. Such unexpected drawbacks result in a significant impact on the trustworthiness of the systems in which the ML models are equipped as the core apparatus.
In this thesis, a series of studies investigates aspects of trustworthiness for complex ML applications, namely the reliability and explainability. Specifically, we focus on music as the primary domain of interest, considering its complexity and subjectivity. Due to this nature of music, ML models for music are necessarily complex for achieving meaningful effectiveness. As such, the reliability and explainability of music ML models are crucial in the field.","Trustworthy Machine Learning; Music Information Retrieval; Transfer Learning; Recommender Systems","en","doctoral thesis","","978-94-6366-418-9","","","","","","","","","Multimedia Computing","","",""
"uuid:ea487abc-b9d9-462b-83db-52264d3dfac3","http://resolver.tudelft.nl/uuid:ea487abc-b9d9-462b-83db-52264d3dfac3","Effects of User Interfaces on Take-Over Performance: A Review of the Empirical Evidence","Kim, S. (TU Delft Human Information Communication Design); van Egmond, R. (TU Delft Human Information Communication Design); Happee, R. (TU Delft Intelligent Vehicles)","","2021","In automated driving, the user interface plays an essential role in guiding transitions between automated and manual driving. This literature review identified 25 studies that explicitly studied the effectiveness of user interfaces in automated driving. Our main selection criterion was how the user interface (UI) affected take-over performance in higher automation levels allowing drivers to take their eyes off the road (SAE3 and SAE4). We categorized user interface (UI) factors from an automated vehicle-related information perspective. Short take-over times are consistently associated with take-over requests (TORs) initiated by the auditory modality with high urgency levels. On the other hand, take-over requests directly displayed on non-driving-related task devices and augmented reality do not affect take-over time. Additional explanations of take-over situation, surrounding and vehicle information while driving, and take-over guiding information were found to improve situational awareness. Hence, we conclude that advanced user interfaces can enhance the safety and acceptance of automated driving. Most studies showed positive effects of advanced UI, but a number of studies showed no significant benefits, and a few studies showed negative effects of advanced UI, which may be associated with information overload. The occurrence of positive and negative results of similar UI concepts in different studies highlights the need for systematic UI testing across driving conditions and driver characteristics. Our findings propose future UI studies of automated vehicle focusing on trust calibration and enhancing situation awareness in various scenarios.","Automated vehicles; Human–machine interaction; Take-over request; User interface","en","journal article","","","","","","","","","","","Human Information Communication Design","","",""
"uuid:f7a55e22-83bc-479f-b73d-ac0847dc499b","http://resolver.tudelft.nl/uuid:f7a55e22-83bc-479f-b73d-ac0847dc499b","Sub-Orbital Flight Demonstration of a 183/540–600 GHz Hybrid CMOS-InP and CMOS-Schottky-MEMS Limb-Sounder","Tang, Adrian (California Institute of Technology; University of California); Alonso Del Pino, M. (TU Delft Tera-Hertz Sensing); Kim, Yanghyo (Steven’s Institute of Technology); Zhang, Yan (University of California); Reck, Theodore (Virginia Diodes Inc.); Jung-Kubiak, Cecile (California Institute of Technology); Nemchick, Deacon (California Institute of Technology); Dyer, Logan (California Institute of Technology); Virbila, Gabriel (University of California); Chattopadhyay, Goutam (California Institute of Technology); Chang, Mau Chung Frank (University of California)","","2021","This paper presents an overview of a sub-orbital flight demonstration with a 183 GHz and 540–600 GHz limb-sounding instrument aboard a stratospheric ballooncraft. The 183 GHz band provides soundings of stratospheric H 2 O and is implemented with a hybrid CMOS-InP receiver architecture which provides excellent sensitivity while remaining compact (162 g) and offering an extremely low DC power consumption (0.62 W). The 540–600 GHz channel sounds stratospheric O 3 and uses a combination of a CMOS local oscillator, GaAs Schottky mixer and micro-electro-mechanical-system (MEMS) RF switch for calibration, again offering competitive form factor (1.4 Kg) and low DC power consumption (6.6 W) compared to prior instruments. The instrument was flown on the NASA Reck-Tang Limb-sounding Experiment (ReckTangLE) ballooncraft and performed atmospheric soundings across New Mexico and Northwestern Texas on Oct. 17 2019.","CMOS; InP; hybrid; Schottky; MEMS; limb-sounder; ReckTangLE","en","journal article","","","","","","","","","","","Tera-Hertz Sensing","","",""
"uuid:310a7c29-12b4-40d6-a860-667af936fb15","http://resolver.tudelft.nl/uuid:310a7c29-12b4-40d6-a860-667af936fb15","Designing for calibrated trust: Exploring the challenges in calibrating trust between users and autonomous vehicles","Valentine, David Callisto (Student TU Delft); Smit, I.R. (TU Delft Human Information Communication Design); Kim, E.D.H.","","2021","Trust is an important factor in building acceptance of autonomous vehicles within our society, but the complex nature of trust makes it challenging to design for an appropriate level of trust. This can lead to instances of mistrust and/or distrust between users and AV’s. Designing for calibrated trust is a possible option to address this challenge. Existing research on designing for calibrated trust focuses on the human machine interaction (HMI), while from literature we infer that trust creation beings much before the first interaction between a user and an AV. The goal of our research is to broaden the scope of calibrated trust, by exploring the pre-use phase and understand the challenges faced in calibration of trust. Within our study 16 mobility experts were interviewed and a thematic analysis of the interviews was conducted. The analysis revealed the lack of clear communication between stakeholders, a solutionism approach towards designing and lack of transparency in design as the prominent challenges. Building on the research insights, we briefly introduce the Calibrated Trust Toolkit as our design solution, and conclude by proposing a sweet spot for achieving calibration of trust between users and autonomous vehicles.","AI Solutionism; Artificial intelligence; Calibrated Trust; Communication; Design to X","en","journal article","","","","","","","","","","","Human Information Communication Design","","",""
"uuid:fa045662-f057-4b3b-bd3e-4a7f1224ccd2","http://resolver.tudelft.nl/uuid:fa045662-f057-4b3b-bd3e-4a7f1224ccd2","Evaluation of DNA extraction yield from a chlorinated drinking water distribution system","Putri, Ratna E. (King Abdullah University of Science and Technology); Kim, Lan Hee (King Abdullah University of Science and Technology); Farhat, Nadia (King Abdullah University of Science and Technology); Felemban, Mashael (King Abdullah University of Science and Technology); Saikaly, Pascal E. (King Abdullah University of Science and Technology); Vrouwenvelder, J.S. (TU Delft BT/Environmental Biotechnology; King Abdullah University of Science and Technology)","","2021","Desalination technology based on Reverse Osmosis (RO) membrane filtration has been resorted to provide high-quality drinking water. RO produced drinking water is characterized by a low bacterial cell concentration. Monitoring microbial quality and ensuring membrane-treated water safety has taken advantage of the rapid development of DNA-based techniques. However, the DNA extraction process from RO-based drinking water samples needs to be evaluated regarding the biomass amount (filtration volume) and residual disinfectant such as chlorine, as it can affect the DNA yield. We assessed the DNA recovery applied in drinking water microbiome studies as a function of (i) different filtration volumes, (ii) presence and absence of residual chlorine, and (iii) the addition of a known Escherichia coli concentration into the (sterile and non-sterile, chlorinated and dechlorinated) tap water prior filtration, and directly onto the (0.2 μm pore size, 47 mm diameter) mixed ester cellulose membrane filters without and after tap water filtration. Our findings demonstrated that the co-occurrence of residual chlorine and low biomass/cell density water samples (RO-treated water with a total cell concentration ranging between 2.47 × 102–1.5 × 103 cells/mL) failed to provide sufficient DNA quantity (below the threshold concentration required for sequencing-based procedures) irrespective of filtration volumes used (4, 20, 40, 60 L) and even after performing dechlorination. After exposure to tap water containing residual chlorine (0.2 mg/L), we observed a significant reduction of E. coli cell concentration and the degradation of its DNA (DNA yield was below detection limit) at a lower disinfectant level compared to what was previously reported, indicating that free-living bacteria and their DNA present in the drinking water are subject to the same conditions. The membrane spiking experiment confirmed no significant impact from any potential inhibitors (e.g. organic/inorganic components) present in the drinking water matrix on DNA extraction yield. We found that very low DNA content is likely to be the norm in chlorinated drinking water that gives hindsight to its limitation in providing robust results for any downstream molecular analyses for microbiome surveys. We advise that measurement of DNA yield is a necessary first step in chlorinated drinking water distribution systems (DWDSs) before conducting any downstream omics analyses such as amplicon sequencing to avoid inaccurate interpretations of results based on very low DNA content. This study expands a substantial source of bias in using DNA-based methods for low biomass samples typical in chlorinated DWDSs. Suggestions are provided for DNA-based research in drinking water with residual disinfectant.","","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:9ec91266-1516-43b7-81ca-f844002a542d","http://resolver.tudelft.nl/uuid:9ec91266-1516-43b7-81ca-f844002a542d","Identification of the haemodynamic environment permissive for plaque erosion","McElroy, Michael (The University of Manchester); Kim, Yongcheol (Yonsei University College of Medicine); Niccoli, Giampaolo (University of Parma); Vergallo, Rocco (Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome; Universita Cattolica del Sacro Cuore); Langford-Smith, Alexander (Manchester Metropolitan University); Crea, Filippo (Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome; Universita Cattolica del Sacro Cuore); Gijsen, F.J.H. (TU Delft ChemE/Transport Phenomena; Erasmus MC); Johnson, Thomas; Keshmiri, Amir (The University of Manchester)","","2021","Endothelial erosion of atherosclerotic plaques is the underlying cause of approximately 30% of acute coronary syndromes (ACS). As the vascular endothelium is profoundly affected by the haemodynamic environment to which it is exposed, we employed computational fluid dynamic (CFD) analysis of the luminal geometry from 17 patients with optical coherence tomography (OCT)-defined plaque erosion, to determine the flow environment permissive for plaque erosion. Our results demonstrate that 15 of the 17 cases analysed occurred on stenotic plaques with median 31% diameter stenosis (interquartile range 28-52%), where all but one of the adherent thrombi located proximal to, or within the region of maximum stenosis. Consequently, all flow metrics related to elevated flow were significantly increased (time averaged wall shear stress, maximum wall shear stress, time averaged wall shear stress gradient) with a reduction in relative residence time, compared to a non-diseased reference segment. We also identified two cases that did not exhibit an elevation of flow, but occurred in a region exposed to elevated oscillatory flow. Our study demonstrates that the majority of OCT-defined erosions occur where the endothelium is exposed to elevated flow, a haemodynamic environment known to evoke a distinctive phenotypic response in endothelial cells.","","en","journal article","","","","","","","","","","","ChemE/Transport Phenomena","","",""
"uuid:a5d9b2ca-4a1d-47ef-82eb-4dfb9e81a8b0","http://resolver.tudelft.nl/uuid:a5d9b2ca-4a1d-47ef-82eb-4dfb9e81a8b0","Simultaneous orientation and 3D localization microscopy with a Vortex point spread function","Hulleman, C.N. (TU Delft ImPhys/Computational Imaging); Thorsen, R.Ø. (TU Delft ImPhys/Computational Imaging); Kim, E. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft; Max Planck Insitute of Biophysics, Frankfurt); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Stallinga, S. (TU Delft ImPhys/Imaging Physics); Rieger, B. (TU Delft ImPhys/Computational Imaging)","","2021","Estimating the orientation and 3D position of rotationally constrained emitters with localization microscopy typically requires polarization splitting or a large engineered Point Spread Function (PSF). Here we utilize a compact modified PSF for single molecule emitter imaging to estimate simultaneously the 3D position, dipole orientation, and degree of rotational constraint from a single 2D image. We use an affordable and commonly available phase plate, normally used for STED microscopy in the excitation light path, to alter the PSF in the emission light path. This resulting Vortex PSF does not require polarization splitting and has a compact PSF size, making it easy to implement and combine with localization microscopy techniques. In addition to a vectorial PSF fitting routine we calibrate for field-dependent aberrations which enables orientation and position estimation within 30% of the Cramér-Rao bound limit over a 66 μm field of view. We demonstrate this technique on reorienting single molecules adhered to the cover slip, λ-DNA with DNA intercalators using binding-activated localization microscopy, and we reveal periodicity on intertwined structures on supercoiled DNA.","OA-Fund TU Delft","en","journal article","","","","","","","","","","ImPhys/Imaging Physics","ImPhys/Computational Imaging","","",""
"uuid:15697fb5-a041-4900-888b-805047db8fc3","http://resolver.tudelft.nl/uuid:15697fb5-a041-4900-888b-805047db8fc3","Use of near-infrared spectroscopy on predicting wastewater constituents to facilitate the operation of a membrane bioreactor","Kim, E. (TU Delft BN/Cees Dekker Lab; IHE Delft Institute for Water Education); Ćurko, Josip (University of Zagreb); Gajdoš Kljusurić, Jasenka (University of Zagreb); Matošić, Marin (University of Zagreb); Crnek, Vlado (University of Zagreb); López-Vázquez, Carlos M. (IHE Delft Institute for Water Education); Garcia, H. (IHE Delft Institute for Water Education); Brdjanovic, Damir (TU Delft BT/Environmental Biotechnology; IHE Delft Institute for Water Education); Valinger, Davor (University of Zagreb)","","2021","The use of near-infrared (NIR) spectroscopy in wastewater treatment has continuously expanded. As an alternative to conventional analytical methods for monitoring constituents in wastewater treatment processes, the use of NIR spectroscopy is considered to be cost-effective and less time-consuming. NIR spectroscopy does not distort the measured sample in any way as no prior treatment is required, making it a waste-free technique. On the negative side, one has to be very well versed with chemometric techniques to interpret the results. In this study, filtered and centrifuged wastewater and sludge samples from a lab-scale membrane bioreactor (MBR) were analysed. Two analytical methods (conventional and NIR spectroscopy) were used to determine and compare major wastewater constituents. Particular attention was paid to soluble microbial products (SMPs) and extracellular polymeric substances (EPSs) known to promote membrane fouling. The parameters measured by NIR spectroscopy were analysed and processed with partial least squares regression (PLSR) and artificial neural networks (ANN) models to assess whether the evaluated wastewater constituents can be monitored by NIR spectroscopy. Very good results were obtained with PLSR models, except for the determination of SMP, making the model qualitative rather than quantitative for their monitoring. ANN showed better performance in terms of correlation of NIR spectra with all measured parameters, resulting in correlation coefficients higher than 0.97 for training, testing, and validation in most cases. Based on the results of this research, the combination of NIR spectra and chemometric modelling offers advantages over conventional analytical methods.","Extracellular polymeric substances; Membrane bioreactor; Near-infrared spectroscopy; Soluble microbial products; Wastewater analyses; Wastewater treatment","en","journal article","","","","","","","","","","","BN/Cees Dekker Lab","","",""
"uuid:31039a1b-ebc4-4c78-9d17-aa9d3bdb24b1","http://resolver.tudelft.nl/uuid:31039a1b-ebc4-4c78-9d17-aa9d3bdb24b1","Refractory CrMoNbWV High-Entropy Alloy Manufactured by Mechanical Alloying and Spark Plasma Sintering: Evolution of Microstructure and Properties","Razumov, Nikolay (St. Petersburg Polytechnic University); Makhmutov, Tagir (St. Petersburg Polytechnic University); Kim, Artem (St. Petersburg Polytechnic University); Shemyakinsky, Boris (St. Petersburg Polytechnic University); Popovich, V. (TU Delft Team Vera Popovich; St. Petersburg Polytechnic University); Popovich, Anatoly (St. Petersburg Polytechnic University)","","2021","In this study, bulk samples of a CrMoNbWV high-entropy alloy (HEA) were obtained for the first time by spark plasma sintering (SPS) of mechanically alloyed (MA) powders at 1200 °C, 1300 °C, and 1400 °C. Microstructure evolution, phase formation as well as wear and corrosion behavior were investigated. The MA powders’ phase composition was found to be represented by body-centered-cubic (BCC) solid solution. The solid solution partially decomposed to Laves phases under the sintering, such as Cr2Nb and (Fe, Cr)Nb, and NbVO4-VO oxides mixture. The temperature increase to 1400 °C led to a grain coarsening of the BCC phase and decreased the Laves phase content accompanied by precipitation at the grain boundaries. The sintered samples showed high hardness and compressive strength (2700–2800 MPa) at room temperature. The wear tests demonstrated excellent results in comparison to conventional wear-resistant composites. The obtained samples also exhibited high corrosion resistance under electrochemical tests in H2SO4 solution. The CrMoNbWV HEA has comparable mechanical and corrosive properties with the WNbMoTaV type HEA, but at the same time has a reduced density: CrMoNbWV—10.55 g/cm3, WNbMoTaV—12.42 g/cm3","high entropy alloys; spark plasma sintering; mechanical alloying; wear; corrosion behavior","en","journal article","","","","","","","","","","","Team Vera Popovich","","",""
"uuid:475cb319-1426-4c42-8201-618ad82b0281","http://resolver.tudelft.nl/uuid:475cb319-1426-4c42-8201-618ad82b0281","FRETboard: semisupervised classification of FRET traces","de Lannoy, C.V. (Wageningen University & Research); Filius, M. (TU Delft BN/Chirlmin Joo Lab); Kim, S.H. (TU Delft BN/Chirlmin Joo Lab); Joo, C. (TU Delft BN/Chirlmin Joo Lab); de Ridder, Dick (Wageningen University & Research)","","2021","Förster resonance energy transfer (FRET) is a useful phenomenon in biomolecular investigations, as it can be leveraged for nanoscale measurements. The optical signals produced by such experiments can be analyzed by fitting a statistical model. Several software tools exist to fit such models in an unsupervised manner but lack the flexibility to adapt to different experimental setups and require local installations. Here, we propose to fit models to optical signals more intuitively by adopting a semisupervised approach, in which the user interactively guides the model to fit a given data set, and introduce FRETboard, a web tool that allows users to provide such guidance. We show that our approach is able to closely reproduce ground truth FRET statistics in a wide range of simulated single-molecule scenarios and correctly estimate parameters for up to 11 states. On in vitro data, we retrieve parameters identical to those obtained by laborious manual classification in a fraction of the required time. Moreover, we designed FRETboard to be easily extendable to other models, allowing it to adapt to future developments in FRET measurement and analysis.","","en","journal article","","","","","","Accepted Author Manuscript","","2022-08-17","","","BN/Chirlmin Joo Lab","","",""
"uuid:6a0f0d46-f5ae-49ed-b600-805b22fce388","http://resolver.tudelft.nl/uuid:6a0f0d46-f5ae-49ed-b600-805b22fce388","Periodic chemical cleaning with urea: Disintegration of biofilms and reduction of key biofilm-forming bacteria from reverse osmosis membranes","Sanawar, H. (TU Delft BT/Environmental Biotechnology; King Abdullah University of Science and Technology); Kim, L. H. (King Abdullah University of Science and Technology); Farhat, N. M. (King Abdullah University of Science and Technology); van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology); Vrouwenvelder, J.S. (TU Delft BT/Environmental Biotechnology; King Abdullah University of Science and Technology)","","2021","Biofouling is one of the major factors causing decline in membrane performance in reverse osmosis (RO) plants, and perhaps the biggest hurdle of membrane technology. Chemical cleaning is periodically carried out at RO membrane installations aiming to restore membrane performance. Typical cleaning agents used in the water treatment industry include sodium hydroxide (NaOH) and hydrochloric acid (HCl) in sequence. Rapid biofilm regrowth and related membrane performance decline after conventional chemical cleaning is a routinely observed phenomenon due to the inefficient removal of biomass from membrane modules. Since extracellular polymeric substances (EPS) make up the strongest and predominant structural framework of biofilms, disintegration of the EPS matrix should be the main target for enhanced biomass removal. Previously, we demonstrated at lab-scale the use of concentrated urea as a chemical cleaning agent for RO membrane systems. The protein denaturation property of urea was exploited to solubilize the proteinaceous foulants, weakening the EPS layer, resulting in enhanced biomass solubilization and removal from RO membrane systems. In this work, we investigated the impact of repeated chemical cleaning cycles with urea/HCl as well as NaOH/HCl on biomass removal and the potential adaptation of the biofilm microbial community. Chemical cleaning with urea/HCl was consistently more effective than NaOH/HCl cleaning over 6 cleaning and regrowth cycles. At the end of the 6 cleaning cycles, the percent reduction was 35% and 41% in feed channel pressure drop, 50% and 70% in total organic carbon, 30% and 40% in EPS proteins, and 40% and 66% in the peak intensities of protein-like matter, after NaOH/HCl cleaning and Urea/HCl cleaning, respectively. 16S ribosomal RNA (rRNA) gene sequencing of the biofilm microbial community revealed that urea cleaning does not select for key biofouling families such as Sphingomonadaceae and Xanthomonadaceae that are known to survive conventional chemical cleaning and produce adhesive EPS. This study reaffirmed that urea possesses all the desirable properties of a chemical cleaning agent, i.e., it dissolves the existing fouling layer, delays fresh fouling accumulation by inhibiting the production of a more viscous EPS, does not cause damage to the membranes, is chemically stable, and environmentally friendly as it can be recycled for cleaning.","Biofilm resistance; Chemical cleaning; Membrane fouling; Seawater desalination; Urea","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:3e3c021f-eaf0-406d-883a-bff35a19ccda","http://resolver.tudelft.nl/uuid:3e3c021f-eaf0-406d-883a-bff35a19ccda","Kinetics of DNA looping by Anabaena sensory rhodopsin transducer (ASRT) by using DNA cyclization assay","Lee, Jae Jin (Sogang University); Kim, S.H. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Lee, Keon Ah (Sogang University); Chuon, Kimleng (Sogang University); Jung, Kwang Hwan (Sogang University); Kim, Doseok (Sogang University)","","2021","DNA cyclization assay together with single-molecule FRET was employed to monitor protein-mediated bending of a short dsDNA (~ 100 bp). This method provides a simple and easy way to monitor the structural change of DNA in real-time without necessitating prior knowledge of the molecular structures for the optimal dye-labeling. This assay was applied to study how Anabaena sensory rhodopsin transducer (ASRT) facilitates loop formation of DNA as a possible mechanism for gene regulation. The ASRT-induced DNA looping was maximized at 50 mM of Na+, while Mg2+ also played an essential role in the loop formation.","","en","journal article","","","","","","","","","","","BN/Chirlmin Joo Lab","","",""
"uuid:4a56acf3-0e93-419f-a2bd-b541880bffa0","http://resolver.tudelft.nl/uuid:4a56acf3-0e93-419f-a2bd-b541880bffa0","Heat treatment effect on the structure formation of directionally solidified nickel alloy after SLM","Borisov, Evgenii (Peter the Great Saint-Petersburg Polytechnic University); Starikov, Kirill (Peter the Great Saint-Petersburg Polytechnic University); Kim, Artem (Peter the Great Saint-Petersburg Polytechnic University); Popovich, V. (TU Delft Team Vera Popovich; Peter the Great Saint-Petersburg Polytechnic University); Popovich, Anatoly (Peter the Great Saint-Petersburg Polytechnic University)","","2021","The aim of this study was to determine the influence of heat treatment on the microstructure of single-crystal nickel-based alloy manufactured by selective laser melting with a high-temperature substrate preheating. The change of gamma/gamma prime -phases ratio was established as a result of various heat treatment modes.","Additive manufacturing; Powder metallurgy; Selective laser melting; Single crystal alloys","en","conference paper","TANGER Ltd.","","","","","","","","","","Team Vera Popovich","","",""
"uuid:b3e232b4-e21b-4b7a-9153-4a6d2a2a8321","http://resolver.tudelft.nl/uuid:b3e232b4-e21b-4b7a-9153-4a6d2a2a8321","Active Control of Irreversible Faradic Reactions to Enhance the Performance of Reverse Electrodialysis for Energy Production from Salinity Gradients","Oh, Yoontaek (University of Cincinnati); Han, Ji Hyung (Korea Institute of Energy Research, Jeju); Kim, Hanki (Korea Institute of Energy Research, Jeju); Jeong, Namjo (Korea Institute of Energy Research, Jeju); Vermaas, D.A. (TU Delft ChemE/Transport Phenomena); Park, Jin Soo (Sangmyung University, Chungnam); Chae, Soryong (University of Cincinnati)","","2021","Irreversible faradic reactions in reverse electrodialysis (RED) are an emerging concern for scale-up, reducing the overall performance of RED and producing environmentally harmful chemical species. Capacitive RED (CRED) has the potential to generate electricity without the necessity of irreversible faradic reactions. However, there is a critical knowledge gap in the fundamental understanding of the effects of operational stack voltages of CRED on irreversible faradic reactions and the performance of CRED. This study aims to develop an active control strategy to avoid irreversible faradic reactions and pH change in CRED, focusing on the effects of a stack voltage (0.9-5.0 V) on irreversible faradic reactions and power generation. Results show that increasing the initial output voltage of CRED by increasing a stack voltage has an insignificant impact on irreversible faradic reactions, regardless of the stack voltage applied, but a cutoff output voltage of CRED is mainly responsible for controlling irreversible faradic reactions. The CRED system with eliminating irreversible faradic reactions achieved a maximum power density (1.6 W m-2) from synthetic seawater (0.513 M NaCl) and freshwater (0.004 M NaCl). This work suggests that the control of irreversible faradic reactions in CRED can provide stable power generation using salinity gradients in large-scale operations.","capacitive reverse electrodialysis; irreversible faradic reactions; pH change; power generation; salinity gradients; stack voltage","en","journal article","","","","","","Accepted Author Manuscript","","2022-07-26","","","ChemE/Transport Phenomena","","",""
"uuid:481c22e7-bb72-4a29-b7aa-1874d5e31b31","http://resolver.tudelft.nl/uuid:481c22e7-bb72-4a29-b7aa-1874d5e31b31","A Blockchain-Based Federated Forest for SDN-Enabled In-Vehicle Network Intrusion Detection System","Aliyu, Ibrahim (Chonnam National University, Yeosu); Feliciano, Marco Carlo (Università degli Studi di Napoli Federico II); van Engelenburg, S.H. (TU Delft Organisation & Governance); Kim, Dong Ok (Jeonnam Technopark, Suncheon); Lim, Chang Gyoon (Chonnam National University, Yeosu)","","2021","In-vehicle communication systems are usually managed by controller area networks (CAN). By broadcasting packets to their bus, the CAN facilitates the interaction between Electronic Control Units (ECU) that coordinate, monitor and control internal vehicle components. With no authentication mechanism for identifying the legitimacy and source of packets, CAN are vulnerable to cyber-attacks. An Intrusion Detection System (IDS) can detect attacks on CAN and machine learning can be used to create the models for the IDSs to detect non-linear attack patterns. However, car manufacturers and owners might want to keep the sensitive information required for training the models confidential. Therefore, we proposed a Blockchain-based Federated Forest Software-Defined Networking (SDN)-enabled IDS (BFF-IDS) to address the problem of data sharing the sensitive CAN data. To ensure scalability, we used InterPlanetary File System (IPFS) to host the models, and the blockchain is designed to store only a hash of the model and a pointer to its location. The SDN provides the dynamic routing of packets and model exchanges. We used Federated Learning (FL) to create a random forest model. Individuals provide partially trained models, allowing them to keep the underlying data confidential. Using Fourier transform, we decomposed the CAN IDs cycle from CAN bus traffic in the frequency domain for better generalization in multiclass detection of attacks. Multiple statistical and entropy features were extracted to handle the high complexity and non-linearity in CAN bus traffic. The proposed system allows manufacturers and car owners to contribute to the training of the models, as their sensitive data is protected. By storing hashes of the models on a blockchain, the risk of adversaries poisoning the models is reduced and a single point of failure is avoided. We evaluated the proposed system by conducting experiments on a testbed. We found that the proposed system has efficient use of memory and CPU resources and that the detection rate of closely related attacks was high. We recorded the highest model attack detection rate of about 0.981.","Blockchain; CAN; federated learning; in-vehicle network; intrusion detection system; random forest; SDN","en","journal article","","","","","","","","","","","Organisation & Governance","","",""
"uuid:ac0665c1-ce46-443f-b861-ee52a86584bd","http://resolver.tudelft.nl/uuid:ac0665c1-ce46-443f-b861-ee52a86584bd","The emerging landscape of single-molecule protein sequencing technologies","Bohländer, P.R. (TU Delft ChemE/Advanced Soft Matter); Filius, M. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); van Kooten, Xander F. (Technion); Pomorski, A.K. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Schmid, S. (Wageningen University & Research); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Eelkema, R. (TU Delft ChemE/Advanced Soft Matter); Kim, S.H. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Joo, C. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft)","","2021","Single-cell profiling methods have had a profound impact on the understanding of cellular heterogeneity. While genomes and transcriptomes can be explored at the single-cell level, single-cell profiling of proteomes is not yet established. Here we describe new single-molecule protein sequencing and identification technologies alongside innovations in mass spectrometry that will eventually enable broad sequence coverage in single-cell profiling. These technologies will in turn facilitate biological discovery and open new avenues for ultrasensitive disease diagnostics.","","en","review","","","","","","Accepted Author Manuscript","","2021-12-07","","","ChemE/Advanced Soft Matter","","",""
"uuid:8cdd6a85-a954-4e33-8d85-62031274eaca","http://resolver.tudelft.nl/uuid:8cdd6a85-a954-4e33-8d85-62031274eaca","Self-healing capacity of Mullite-Yb2SiO5 environmental barrier coating material with embedded Ti2AlC MAX phase particles","Lee, Gye Won (Kookmin University); Kim, Tae Woo (Kookmin University); Sloof, W.G. (TU Delft Team Kevin Rossi); Lee, Kee Sung (Kookmin University)","","2021","Repetitive heating and cooling cycles inevitably cause crack damage of hot gas components of gas turbine engines, such as blades and vanes. In this study the self-healing capacity is investigated of mullite + ytterbium monosilicate (Yb2SiO5) as EBC material with Ti2AlC MAX phase particles embedded as a crack-healing agent. The effect of Ti2AlC in the EBC was compared with the self-healing ability of the mullite + Yb2SiO5 material. After introducing cracks by Vickers indentation on the surface of each sample, crack healing was realized by controlling the temperature and time during the post-heat-treatment process. For the mullite + Yb2SiO5 composite with Ti2AlC particles, crack healing occurred at 1000 °C, while in the case of the mullite + Yb2SiO5 composite without Ti2AlC, a sustained temperature of 1300 °C or higher was required. Compared with the healing of the mullite + Yb2SiO5 composite by the formation of a eutectic phase, the addition of Ti2AlC promoted healing via the oxidation of Ti and Al. Notably, the surface formation of a ternary oxide of Ti–Yb–O was confirmed, which completely covered the damage area. Consequently, the addition of a Ti2AlC MAX phase to the EBC composite resulted in a complete strength recovery, while the mullite + Yb2SiO5 composite without Ti2AlC showed a strength recovery of about 80%. Furthermore, by analyzing the indentation load–displacement curve to indicate the role of Ti2AlC, the addition of Ti2AlC improved both the hardness and stiffness of the composite.","Crack healing; Environmental barrier coating; Mechanical properties; TiAlC","en","journal article","","","","","","Accepted Author Manuscript","","2023-07-13","","","Team Kevin Rossi","","",""
"uuid:631c61a9-cb02-4e20-a80d-40bed342e036","http://resolver.tudelft.nl/uuid:631c61a9-cb02-4e20-a80d-40bed342e036","Shear band-driven precipitate dispersion for ultrastrong ductile medium-entropy alloys","Jang, Tae Jin (Korea University); Choi, Won Seok (Korea Advanced Institute of Science and Technology); Kim, Dae Woong (Pohang University of Science and Technology); Choi, Gwanghyo (Korea Advanced Institute of Science and Technology); Jun, Hosun (Korea Advanced Institute of Science and Technology); Ferrari, A. (TU Delft Team Marcel Sluiter); Körmann, F.H.W. (TU Delft Team Marcel Sluiter; Max-Planck-Institut für Eisenforschung); Choi, Pyuck Pa (Korea Advanced Institute of Science and Technology); Sohn, Seok Su (Korea University)","","2021","Precipitation strengthening has been the basis of physical metallurgy since more than 100 years owing to its excellent strengthening effects. This approach generally employs coherent and nano-sized precipitates, as incoherent precipitates energetically become coarse due to their incompatibility with matrix and provide a negligible strengthening effect or even cause brittleness. Here we propose a shear band-driven dispersion of nano-sized and semicoherent precipitates, which show significant strengthening effects. We add aluminum to a model CoNiV medium-entropy alloy with a face-centered cubic structure to form the L21 Heusler phase with an ordered body-centered cubic structure, as predicted by ab initio calculations. Micro-shear bands act as heterogeneous nucleation sites and generate finely dispersed intragranular precipitates with a semicoherent interface, which leads to a remarkable strength-ductility balance. This work suggests that the structurally dissimilar precipitates, which are generally avoided in conventional alloys, can be a useful design concept in developing high-strength ductile structural materials.","","en","journal article","","","","","","+ Author Correction https://doi.org/10.1038/s41467-021-26008-1","","","","","Team Marcel Sluiter","","",""
"uuid:02a52218-9f6b-4c02-8f49-f00ee4e3e728","http://resolver.tudelft.nl/uuid:02a52218-9f6b-4c02-8f49-f00ee4e3e728","Bridging-induced phase separation induced by cohesin SMC protein complexes","Ryu, J.K. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Bouchoux, Céline (Francis Crick Institute); Liu, Hon Wing (Francis Crick Institute); Kim, E. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Minamino, Masashi (Francis Crick Institute); de Groot, Ralph (Kavli institute of nanoscience Delft; Student TU Delft); Katan, A.J. (TU Delft QN/Afdelingsbureau; Kavli institute of nanoscience Delft); Bonato, Andrea (University of Edinburgh); Marenduzzo, Davide (University of Edinburgh); Michieletto, Davide (University of Edinburgh); Uhlmann, Frank (Francis Crick Institute); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft)","","2021","Structural maintenance of chromosome (SMC) protein complexes are able to extrude DNA loops. While loop extrusion constitutes a fundamental building block of chromosomes, other factors may be equally important. Here, we show that yeast cohesin exhibits pronounced clustering on DNA, with all the hallmarks of biomolecular condensation. DNA-cohesin clusters exhibit liquid-like behavior, showing fusion of clusters, rapid fluorescence recovery after photobleaching and exchange of cohesin with the environment. Strikingly, the in vitro clustering is DNA length dependent, as cohesin forms clusters only on DNA exceeding 3 kilo-base pairs. We discuss how bridging-induced phase separation, a previously unobserved type of biological condensation, can explain the DNA-cohesin clustering through DNA-cohesin-DNA bridges. We confirm that, in yeast cells in vivo, a fraction of cohesin associates with chromatin in a manner consistent with bridging-induced phase separation. Biomolecular condensation by SMC proteins constitutes a new basic principle by which SMC complexes direct genome organization.","","en","journal article","","","","","","","","","","","BN/Cees Dekker Lab","","",""
"uuid:8726d828-26c7-457c-9777-3b4be108b57d","http://resolver.tudelft.nl/uuid:8726d828-26c7-457c-9777-3b4be108b57d","High-Resolution Single-Molecule FRET via DNA eXchange (FRET X)","Filius, M. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Kim, S.H. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Severins, I.W.H. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Joo, C. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft)","","2021","Single-molecule FRET is a versatile tool to study nucleic acids and proteins at the nanometer scale. However, currently, only a couple of FRET pairs can be reliably measured on a single object, which makes it difficult to apply single-molecule FRET for structural analysis of biomolecules. Here, we present an approach that allows for the determination of multiple distances between FRET pairs in a single object. We use programmable, transient binding between short DNA strands to resolve the FRET efficiency of multiple fluorophore pairs. By allowing only a single FRET pair to be formed at a time, we can determine the pair distance with subnanometer precision. The distance between other pairs are determined by sequentially exchanging DNA strands. We name this multiplexing approach FRET X for FRET via DNA eXchange. Our FRET X technology will be a tool for the high-resolution analysis of biomolecules and nanostructures.","DNA nanotechnology; DNA-PAINT; Single-molecule FRET; single-molecule multiplexing; structural biology","en","journal article","","","","","","","","","","","BN/Chirlmin Joo Lab","","",""
"uuid:10f5b237-eeb4-419d-821b-5117d1815cae","http://resolver.tudelft.nl/uuid:10f5b237-eeb4-419d-821b-5117d1815cae","Screening wave conditions for the occurrence of green water events on sailing ships","van Essen, S.M. (TU Delft Ship Hydromechanics and Structures; Maritime Research Institute Netherlands (MARIN)); Monroy, Charles (Bureau Veritas (BV) Marine & Offshore, Puteaux); Shen, Zhirong (American Bureau of Shipping (ABS), Spring); Helder, Joop (Maritime Research Institute Netherlands (MARIN)); Kim, Dae Hyun (American Bureau of Shipping (ABS), Spring); Seng, Sopheak (Bureau Veritas (BV) Marine & Offshore, Puteaux); Ge, Zhongfu (American Bureau of Shipping (ABS), Spring)","","2021","Design loads for extreme wave events on ships, such as slamming and green water, are hard to define. These events depend on details in the incoming waves, ship motions and structure layout, which requires high-fidelity tools such as CFD or experiments to obtain the correct loads. These tools (presently) do not have the capability to fully resolve the long-term statistics of rare events in all metocean conditions over the ship's lifetime. The idea of ‘screening’ is to use lower-fidelity numerical methods to identify the occurrence of extreme load events based on an indicator. A good indicator has a strong correlation to the design load, but is easier to calculate. A high-fidelity tool can then be used to find the loads in these events. The low-fidelity statistics and the high-fidelity loads can be combined to define a design load and its probability. The present study compares different numerical screening indicators for green water loads on a containership against experiments. The quality of the identification of the critical events and the required computational time served as comparison metrics. This showed that screening both with potential flow tools and with coarse mesh CFD tools is feasible, provided the indicator, grid, time step and wave input settings are well chosen. The results from coarse mesh CFD are slightly better than from potential flow, but the computational costs are much higher. The results also show that the peaks and steepness of the relative wave elevation around the bow are suitable green water load indicators, as well as the undisturbed wave crests at the bow. Fine mesh CFD calculations were done for the identified events based on an example indicator, which resulted in a green water load distribution very close to that of the experiments. This study shows that screening could potentially reduce the required high-fidelity modelling time with up to ∼90% compared to common practice.","Coarse mesh CFD; Critical events; Design loads; Extreme events; Green water; Multi-fidelity approach; Potential flow; Screening; Waves","en","journal article","","","","","","","","","","","Ship Hydromechanics and Structures","","",""
"uuid:65cc6070-c8ad-44eb-a56b-a5554ce1cd37","http://resolver.tudelft.nl/uuid:65cc6070-c8ad-44eb-a56b-a5554ce1cd37","Supporting human-centered design in psychologically distant problem domains: The design for cybersecurity cards","Rao, Vivek (University of California); Moore, George (University of California); Jung, Hyun Jie (University of California); Kim, E.Y. (TU Delft Responsible Marketing and Consumer Behavior); Agogino, Alice (University of California); Goucher-Lambert, Kosa (University of California)","","2021","Increasingly digital products and services make cybersecurity a crucial issue for designers. However, human-centered designers struggle to consider it in their work, partially a consequence of the high psychological distance between designers and cybersecurity. In this work, we build on the Design for Cybersecurity (DfC) Cards, an intervention to help designers consider cybersecurity, and examine a project-based design course to understand how and why specific DfC cards were used. Three findings result. First, designers found the intervention useful across all design phases and activities. Second, the cards helped design teams refocus their attention on the problem domain and project outcome. Third, we identify a need for support in framing and converging during user research, opportunity identification, and prototyping. We argue that the psychological distance between designers and the problem space of cybersecurity partially explains these findings, and ultimately exacerbates existing challenges in the design process. These findings suggest that design interventions must consider the psychological distance between designer and problem space, and have application in design practice across many complex problem domains.","Creativity; Cybersecurity; Design cognition; Human behaviour in design","en","journal article","","","","","","","","","","","Responsible Marketing and Consumer Behavior","","",""
"uuid:b44a54a9-f743-411e-a1aa-9ced73781697","http://resolver.tudelft.nl/uuid:b44a54a9-f743-411e-a1aa-9ced73781697","Association between thyroid function and heart rate monitored by wearable devices in patients with hypothyroidism","Kim, K. (TU Delft Methodologie en Organisatie van Design; Pusan National University; Ulsan National Institute of Science and Technology); Lee, Juhui (Thyroscope Inc., Ulsan); Ahn, Chang Ho (Seoul National University College of Medicine, Seongnam); Yu, Hyeong Won (Seoul National University College of Medicine, Seongnam); Choi, June Young (Seoul National University); Lee, Ho Young (Seoul National University College of Medicine, Seongnam); Lee, Won Woo (Seoul National University College of Medicine, Seongnam); Moon, Jae Hoon (Thyroscope Inc., Ulsan; Seoul National University College of Medicine, Seongnam)","","2021","Background: Heart rate (HR) monitored by a wearable device (WD) has demonstrated its clinical feasibility for thyrotoxicosis subjects. However, the association of HR monitored by wearables with hypothyroidism has not been examined. We assessed the association between serum thyroid hormone concentration and three WD-HR parameters in hypothyroid subjects. Methods: Forty-four subjects scheduled for radioactive iodine therapy (RAI Tx) after thyroid cancer surgery were included. Thirty subjects were prepared for RAI Tx by thyroid hormone withdrawal (hypothyroidism group) and 14 subjects by recombinant human thyrotropin (control group). Three WD-HR parameters were calculated from the HR data collected during rest, during sleep, and from 2:00 AM to 6:00 AM, respectively. We analyzed the changes in conventionally measured resting HR (On-site rHR) and WD-HR parameters relative to thyroid hormone levels. Results: Serum free thyroxine (T4) levels, On-site rHR, and WD-HR parameters were lower in the hypothyroid group than in the control group at the time of RAI Tx. WD-HR parameters also reflected minute changes in free T4 levels. A decrease in On-site rHR and WD-HR parameters by one standard deviation (On-site rHR, approximately 12 bpm; WD-HR parameters, approximately 8 bpm) was associated with a 0.2 ng/dL decrease in free T4 levels (P<0.01) and a 2-fold increase of the odds ratio of hypothyroidism (P<0.01). WD-HR parameters displayed a better goodness-of-fit measure (lower quasi-information criterion value) than On-site rHR in predicting the hypothyroidism. Conclusion: This study identified WD-HR parameters as informative and easy-to-measure biomarkers to predict hypothyroidism.","Heart rate; Hypothyroidism; Wearable electronic devices","en","journal article","","","","","","","","","","","Methodologie en Organisatie van Design","","",""
"uuid:88746b84-33f8-4156-9b50-5acc9436be98","http://resolver.tudelft.nl/uuid:88746b84-33f8-4156-9b50-5acc9436be98","Suppression of the Phase Coexistence of the fcc-fct Transition in Hafnium-Hydride Thin Films","Bannenberg, L.J. (TU Delft RID/TS/Instrumenten groep); Schreuders, H. (TU Delft ChemE/O&O groep); Kim, H.J. (National Institute of Advanced Industrial Science and Technology (AIST)); Sakaki, Kouji (National Institute of Advanced Industrial Science and Technology (AIST)); Hayashi, Shigenobu (National Institute of Advanced Industrial Science and Technology (AIST)); Ikeda, Kazutaka (The High Energy Accelerator Research Organization (KEK)); Otomo, Toshiya (National Institute of Advanced Industrial Science and Technology (AIST)); Dam, B. (TU Delft ChemE/Chemical Engineering); Asano, Kohta (National Institute of Advanced Industrial Science and Technology (AIST))","","2021","Metal hydrides may play a paramount role in a future hydrogen economy. While most applications are based on nanostructured and confined materials, studies considering the structural response of these materials to hydrogen concentrate on bulk material. Here, using in situ in- and out-of-plane X-ray diffraction and reflectometry, we study the fcc ↔fct transition in Hf thin films, an optical hydrogen-sensing material. We show that the confinement of Hf affects this transition: compared to bulk Hf, the transition is pushed to a higher hydrogen-to-metal ratio, the tetragonality of the fct phase is reduced, and phase coexistence is suppressed. These nanoconfinement effects ensure the hysteresis- free response of hafnium to hydrogen, enabling its remarkable performance as a hydrogen-sensing material. In a wider perspective, the results highlight the profound influences of the nanostructuring and nanoconfinement of metal hydrides on their structural response to hydrogen with a significant impact on their applicability in future devices.","","en","journal article","","","","","","","","","","ChemE/Chemical Engineering","RID/TS/Instrumenten groep","","",""
"uuid:1fc6552c-403a-49d6-8347-3da7824dd28e","http://resolver.tudelft.nl/uuid:1fc6552c-403a-49d6-8347-3da7824dd28e","Acoustic subsurface-atomic force microscopy: Three-dimensional imaging at the nanoscale","Sharahi, Hossein J. (University of Calgary); Janmaleki, Mohsen (University of Calgary); Tetard, Laurene (University of Central Florida); Kim, Seonghwan (University of Calgary); Sadeghian, Hamed (Eindhoven University of Technology; Nearfield Instruments B.V.); Verbiest, G.J. (TU Delft Dynamics of Micro and Nano Systems)","","2021","The development of acoustic subsurface atomic force microscopy, which promises three-dimensional imaging with single-digit nanometer resolution by the introduction of ultrasound actuations to a conventional atomic force microscope, has come a long way since its inception in the early 1990s. Recent advances provide a quantitative understanding of the different experimentally observed contrast mechanisms, which paves the way for future applications. In this Perspective, we first review the different subsurface atomic force microscope modalities: ultrasonic force microscopy, atomic force acoustic microscopy, heterodyne force microscopy, mode-synthesizing atomic force microscopy, and near-field picosecond ultrasonic microscopy. Then, we highlight and resolve a debate existing in the literature on the importance of the chosen ultrasound excitation frequencies with respect to the resonance frequencies of the cantilever and the observed contrast mechanisms. Finally, we discuss remaining open problems in the field and motivate the importance of new actuators, near-field picosecond ultrasonics, and integration with other techniques to achieve multi-functional non-destructive three-dimensional imaging at the nanoscale.","","en","journal article","","","","","","","","","","","Dynamics of Micro and Nano Systems","","",""
"uuid:2ba01344-3101-4d53-b334-72949327b4ab","http://resolver.tudelft.nl/uuid:2ba01344-3101-4d53-b334-72949327b4ab","Design of an ultrasound transceiver asic with a switching-artifact reduction technique for 3D carotid artery imaging","Kim, Taehoon (Student TU Delft); Fool, F. (TU Delft ImPhys/Medical Imaging); Simoes dos Santos, D. (TU Delft ImPhys/Medical Imaging); Chang, Z.Y. (TU Delft Electronic Instrumentation); Noothout, E.C. (TU Delft ImPhys/Medical Imaging); Vos, H.J. (TU Delft ImPhys/Medical Imaging; Erasmus MC); Bosch, Johan G. (Erasmus MC); Verweij, M.D. (TU Delft ImPhys/Medical Imaging; Erasmus MC); de Jong, N. (TU Delft ImPhys/Medical Imaging; Erasmus MC); Pertijs, M.A.P. (TU Delft Electronic Instrumentation)","","2021","This paper presents an ultrasound transceiver application-specific integrated circuit (ASIC) directly integrated with an array of 12 × 80 piezoelectric transducer elements to enable next-generation ultrasound probes for 3D carotid artery imaging. The ASIC, implemented in a 0.18 µm high-voltage Bipolar-CMOS-DMOS (HV BCD) process, adopted a programmable switch matrix that allowed selected transducer elements in each row to be connected to a transmit and receive channel of an imaging system. This made the probe operate like an electronically translatable linear array, allowing large-aperture matrix arrays to be interfaced with a manageable number of system channels. This paper presents a second-generation ASIC that employed an improved switch design to minimize clock feedthrough and charge-injection effects of high-voltage metal–oxide–semiconductor field-effect transistors (HV MOSFETs), which in the first-generation ASIC caused parasitic transmis-sions and associated imaging artifacts. The proposed switch controller, implemented with cascaded non-overlapping clock generators, generated control signals with improved timing to mitigate the effects of these non-idealities. Both simulation results and electrical measurements showed a 20 dB reduction of the switching artifacts. In addition, an acoustic pulse-echo measurement successfully demonstrated a 20 dB reduction of imaging artifacts.","3D ultrasound imaging; Charge injection; Clock feedthrough; High-voltage (HV) switches; Matrix transducers; Ultrasound application-specific integrated circuit (ASIC)","en","journal article","","","","","","","","","","","ImPhys/Medical Imaging","","",""
"uuid:27860187-b263-4e98-a423-8f8629891116","http://resolver.tudelft.nl/uuid:27860187-b263-4e98-a423-8f8629891116","Experimental Investigation of the Effect of Subdicing on an Ultrasound Matrix Transducer","Simoes dos Santos, D. (TU Delft ImPhys/Medical Imaging); Fool, F. (TU Delft ImPhys/Medical Imaging); Kim, Taehoon (Student TU Delft); Noothout, E.C. (TU Delft ImPhys/Medical Imaging); Vos, H.J. (TU Delft ImPhys/Medical Imaging; Erasmus MC); Bosch, Johan G. (Erasmus MC); Pertijs, M.A.P. (TU Delft Electronic Instrumentation); Verweij, M.D. (TU Delft ImPhys/Medical Imaging; Erasmus MC); de Jong, N. (TU Delft ImPhys/Medical Imaging; Erasmus MC)","","2021","Over the past decades, real-time three-dimensional (3D) medical ultrasound has attracted much attention since it enables clinicians to diagnose more accurately. This calls for ultrasound matrix transducers with a large number of elements, which can be interfaced with an application-specific integrated circuit (ASIC) for data reduction. An important aspect of the design of such a transducer is the geometry of each element, since it affects the mode of vibration and, consequently, the efficiency of the transducer. In this paper, we experimentally investigate the effect of subdicing on a piezoelectric (PZT) transducer. We fabricate and acoustically characterize a prototype PZT matrix transducer built on top of ASICs. The prototype transducer contains subdiced and non-subdiced elements, whose performance can be directly compared under the same conditions. Measurement results show that subdiced elements have a better performance compared to non-subdiced ones. Subdicing increases the peak pressure by 25%, raises the bandwidth by 10% and reduces the ringing time by 25%.","ASIC; PZT; matrix; subdicing; ultrasound transducer","en","conference paper","IEEE","","","","","Accepted Author Manuscript","","","","","ImPhys/Medical Imaging","","",""
"uuid:e9d5de49-a477-4cae-a230-8facd04c7b8e","http://resolver.tudelft.nl/uuid:e9d5de49-a477-4cae-a230-8facd04c7b8e","How Florist Apprentices Explore Bouquet Designs: Supporting Design Space Exploration for Vocational Students","Kim, Kevin Gonyop (Swiss Federal Institute of Technology); Oertel, Catharine (TU Delft Interactive Intelligence; Swiss Federal Institute of Technology); Dillenbourg, Pierre (Swiss Federal Institute of Technology)","","2021","Context: Exploring the design space is an important process in a design task. In this study, we considered design space exploration for the learners in vocational education and training (VET). The goal of the study was to investigate how they explore the design space while focusing on the effect of a graph-like interface on the learner's understanding of the design space. With florists as the target profession, we investigated how the apprentices explore design variations, what they would gain from such activity, and how we can support this process. Approach: We developed a web application called BloomGraph that allows learners to explore design variations. It provides a graph-based interface that enables the systematic variation of design. Using the BloomGraph application, we conducted an experimental study with 44 florist apprentices in Switzerland to investigate the effect of the graph-based interface which provides a structured way of exploring the design space. The experimental group was given the graph-based interface to explore design variations while the control group had a linear-based interface. We compared them in terms of the number of bouquets explored, time of exploration, diversity of bouquets explored, and the learning gain in terms of the understanding of the design space measured using pre and post-Tests. We also analyzed the strategies adopted by the participants for the graph navigation and the visual exploration behavior using the eye gaze data. Findings: Our analysis shows that the graph-based interface fosters a better understanding of the size of the design space and more efficient navigation towards a goal design in terms of the number of intermediate designs but with longer exploration of each intermediate design compared to the linear-based interface. Regarding the behavioral patterns in graph exploration, the participants who showed more strategic behavior in the design choices acquired a better understanding of the design space. Additionally, we trained a model that predicts the next choice of a learner using eye tracking data. It provides a reasonable accuracy that opens new possibilities for future studies. Conclusion: The findings of this study support the feasibility of design space exploration as a digital activity for VET learners and show how the learners can benefit from it. The contribution of the paper includes the validation of the idea with florist apprentices and the demonstration of how the process can be supported using a structured interface and the learner behavior analysis. This paper shows how a design exploration activity can provide an added value in the learning of an apprentice in a design-related VET system.","Design Exploration; Educational Technology; Learning Activities; Learning Experience; VET; Vocational Education and Training","en","journal article","","","","","","","","","","","Interactive Intelligence","","",""
"uuid:6c4223c1-10e0-4df2-bd52-b8eb7aefafed","http://resolver.tudelft.nl/uuid:6c4223c1-10e0-4df2-bd52-b8eb7aefafed","Electrostatic electron mirror in SEM for simultaneous imaging of top and bottom surfaces of a sample","Abedzadeh, Navid (Massachusetts Institute of Technology); Krielaart, M.A.R. (TU Delft ImPhys/Microscopy Instrumentation & Techniques); Kim, Chung Soo (Massachusetts Institute of Technology); Simonaitis, John (Massachusetts Institute of Technology); Hobbs, Richard (Trinity College Dublin); Kruit, P. (TU Delft ImPhys/Microscopy Instrumentation & Techniques); Berggren, Karl K. (Massachusetts Institute of Technology)","","2021","The use of electron mirrors in aberration correction and surface-sensitive microscopy techniques such as low-energy electron microscopy has been established. However, in this work, by implementing an easy to construct, fully electrostatic electron mirror system under a sample in a conventional scanning electron microscope (SEM), we present a new imaging scheme which allows us to form scanned images of the top and bottom surfaces of the sample simultaneously. We believe that this imaging scheme could be of great value to the field of in-situ SEM which has been limited to observation of dynamic changes such as crack propagation and other surface phenomena on one side of samples at a time. We analyze the image properties when using a flat versus a concave electron mirror system and discuss two different regimes of operation. In addition to in-situ SEM, we foresee that our imaging scheme could open up avenues towards spherical aberration correction by the use of electron mirrors in SEMs without the need for complex beam separators.","Aberration correction; Electron mirror; In-situ SEM; SEM","en","journal article","","","","","","Accepted Author Manuscript","","2022-05-05","","","ImPhys/Microscopy Instrumentation & Techniques","","",""
"uuid:fb78faab-2dfb-4390-8369-d99973a3a9ff","http://resolver.tudelft.nl/uuid:fb78faab-2dfb-4390-8369-d99973a3a9ff","Data-Driven Approach to Dual Service Failure Monitoring From Negative Online Reviews: Managerial Perspective","Joung, Junegak (University of Illinois at Urbana-Champaign; Ulsan National Institute of Science and Technology); Kim, K. (TU Delft Methodologie en Organisatie van Design; Ulsan National Institute of Science and Technology); Kim, Kwangsoo (Pohang University of Science and Technology)","","2021","Monitoring of dual service failures (e.g., trends in service failures and consecutive service failures) in business is emphasized for service quality management. Previous studies analyzing negative online reviews to conduct dual service failure monitoring from a managerial perspective are scarce. Numerous negative online reviews are useful sources for dual service failure monitoring because they can be easily collected at a low cost. This article proposes a data-driven approach to monitor service failure trends and consecutive service failures from negative online reviews. In the proposed approach, first a classifier is developed to categorize newly collected negative reviews into service failures by Latent Dirichlet allocation. Subsequently, a threshold value is provided to identify a new type of service failure, which was not achieved previously using a control chart. Finally, the probability of consecutive service failures is obtained by association rule mining. A case study of Uber is conducted to validate the proposed approach. The results exhibit that the proposed approach can perform dual service failure monitoring. This study can increase marketing intelligence for dynamic management of service failure and allow rapid responses to service failures.","consecutive service failures; customer reviews; data analytics; service failure trends; text mining","en","journal article","","","","","","","","","","","Methodologie en Organisatie van Design","","",""
"uuid:5f26faaf-af88-45c7-8b12-3663416e9c6a","http://resolver.tudelft.nl/uuid:5f26faaf-af88-45c7-8b12-3663416e9c6a","Deep learning enhanced individual nuclear-spin detection","Jung, Kyunghoon (Seoul National University); Abobeih, M.H.M.A. (TU Delft QID/Taminiau Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft); Yun, Jiwon (Seoul National University); Kim, Gyeonghun (Seoul National University); Oh, Hyunseok (Seoul National University); Henry, Ang (University College London (UCL)); Taminiau, T.H. (TU Delft QID/Taminiau Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft); Kim, Dohun (Seoul National University)","","2021","The detection of nuclear spins using individual electron spins has enabled diverse opportunities in quantum sensing and quantum information processing. Proof-of-principle experiments have demonstrated atomic-scale imaging of nuclear-spin samples and controlled multi-qubit registers. However, to image more complex samples and to realize larger-scale quantum processors, computerized methods that efficiently and automatically characterize spin systems are required. Here, we realize a deep learning model for automatic identification of nuclear spins using the electron spin of single nitrogen-vacancy (NV) centers in diamond as a sensor. Based on neural network algorithms, we develop noise recovery procedures and training sequences for highly non-linear spectra. We apply these methods to experimentally demonstrate the fast identification of 31 nuclear spins around a single NV center and accurately determine the hyperfine parameters. Our methods can be extended to larger spin systems and are applicable to a wide range of electron-nuclear interaction strengths. These results pave the way towards efficient imaging of complex spin samples and automatic characterization of large spin-qubit registers.","","en","journal article","","","","","","","","","","","QID/Taminiau Lab","","",""
"uuid:b1b4df06-2bea-4d47-a43c-7ec71f6df28e","http://resolver.tudelft.nl/uuid:b1b4df06-2bea-4d47-a43c-7ec71f6df28e","Decomposing Magnetic Dark-Field Contrast in Spin Analyzed Talbot-Lau Interferometry: A Stern-Gerlach Experiment without Spatial Beam Splitting","Valsecchi, Jacopo (Paul Scherrer Institut; Université de Genève); Makowska, Malgorzata G. (Paul Scherrer Institut); Kim, Youngju (Pusan National University); Lee, Seung Wook (Pusan National University); Grünzweig, Christian (Paul Scherrer Institut); Piegsa, Florian M. (University of Bern); Thijs, M.A. (TU Delft RID/TS/Technici Pool); Plomp, J. (TU Delft RID/TS/Instrumenten groep); Strobl, Markus (Paul Scherrer Institut; University of Copenhagen)","","2021","We have recently shown how a polarized beam in Talbot-Lau interferometric imaging can be used to analyze strong magnetic fields through the spin dependent differential phase effect at field gradients. While in that case an adiabatic spin coupling with the sample field is required, here we investigate a nonadiabatic coupling causing a spatial splitting of the neutron spin states with respect to the external magnetic field. This subsequently leads to no phase contrast signal but a loss of interferometer visibility referred to as dark-field contrast. We demonstrate how the implementation of spin analysis to the Talbot-Lau interferometer setup enables one to recover the differential phase induced to a single spin state. Thus, we show that the dark-field contrast is a measure of the quantum mechanical spin split analogous to the Stern-Gerlach experiment without, however, spatial beam separation. In addition, the spin analyzed dark-field contrast imaging introduced here bears the potential to probe polarization dependent small-angle scattering and thus magnetic microstructures.","","en","journal article","","","","","","","","","","","RID/TS/Technici Pool","","",""
"uuid:6ce4bf4b-851f-4066-afba-315199a4abd6","http://resolver.tudelft.nl/uuid:6ce4bf4b-851f-4066-afba-315199a4abd6","Substantiation of home occupant archetypes with the use of generative techniques: analysis and results of focus groups","Ortiz, Marco A. (TU Delft Indoor Environment); Kim, D.H. (TU Delft Indoor Environment); Bluyssen, P.M. (TU Delft Indoor Environment)","","2020","A previous study clustered home occupants into archetypes with a questionnaire. This study uses qualitative methods to strengthen those previously-found archetypes with data pertaining to the participants’ home experiences. Focus groups were carried out where generative activities were conducted involving the generation of collages. The first activity dealt with the expression of ‘meaning of energy use at home’ and the second one with the ‘ideal home experience’. Analyses were done with content and thematic analysis. Codes were drawn from the data and were assimilated through an affinity diagram. The diagram produced two categories: building themes and human themes, along with five sub-categories (home, financial, energy, psychological, and behavioural aspects). The outcome shows that each archetype expresses needs and meanings of an ideal home experience and energy use differently from each other. The results provide evidence that generative techniques can be used in energy research. In this case, to validate and substantiate the quantitative archetypes previously produced with a questionnaire. Interpretive knowledge in energy research allows for a better understanding of occupants’ differing behavioural patterns in regards to energy use and comfort. It allows customizing interventions to the archetypes’ specific needs to decrease energy consumption while maintaining comfort.","Energy saving; environment and behaviour; human behaviour; occupant comfort; user experience design","en","journal article","","","","","","","","","","","Indoor Environment","","",""
"uuid:d2773233-21e6-477d-86a5-34fd72a57a4a","http://resolver.tudelft.nl/uuid:d2773233-21e6-477d-86a5-34fd72a57a4a","Clustering of office workers from the OFFICAIR study in The Netherlands based on their self-reported health and comfort","Kim, D.H. (TU Delft Indoor Environment); Bluyssen, P.M. (TU Delft Indoor Environment)","","2020","The growing field of indoor health and comfort studies recently shifted from predicting the average comfort and wellbeing of a large population into identifying the needs of individuals in different scenarios. This study aimed to identify different profiles of office workers in the Netherlands who took part in the OFFICAIR study, based on their self-reported health and comfort. Associations of respondents’ health and comfort with gender and type of office indicated that female occupants experienced significantly higher numbers of building-related symptoms and consistently lower satisfaction levels of their office environment than male occupants. Workers in open space offices without partitions reported lower satisfaction and suffered from building-related symptoms more frequently than occupants in single person offices. TwoStep cluster analysis revealed three profiles of occupants: Healthy and satisfied workers, Moderate healthy and noise-bothered workers and Unhealthy and Air and temperature-bothered workers. While the first group was by far the healthiest, significant higher risks for building-related symptoms such as dry eyes (OR: 3.38), dry skin (OR: 2.87) and watering, itchy eyes (OR: 2.7) were identified for the unhealthy group than for the moderate healthy group. The results confirm the need of an integrated approach to better understand moderate and unhealthy groups in order to provide customised solutions for individuals with different complaints and needs.","Building-related symptoms; Indoor environmental quality; Office workers; Self-reported health and comfort; TwoStep cluster analysis","en","journal article","","","","","","","","","","","Indoor Environment","","",""
"uuid:84ce2631-70ed-4f38-808c-87fb9f453e9e","http://resolver.tudelft.nl/uuid:84ce2631-70ed-4f38-808c-87fb9f453e9e","First results of self-reported health and comfort of staff in outpatient areas of hospitals in the Netherlands","Eijkelenboom, A.M. (TU Delft Indoor Environment); Kim, D.H. (TU Delft Indoor Environment); Bluyssen, P.M. (TU Delft Indoor Environment)","","2020","It is well known that the demand on hospital staff is increasing and that their comfort and health may be affected negatively by dose and building-related aspects. Comfort and health may differ between hospital departments. However, outpatient areas are understudied. To better understand comfort and health of staff in outpatient areas a survey was performed in which social comfort, personal and work-related aspects were all accounted for. This study aimed to identify comfort and health in relation to different room types. Of the 1694 invitations that were sent to outpatient staff of six buildings, 566 respondents (33%) were included in the analysis. There was little difference in the prevalence of the main self-reported symptoms, dry eyes and headache, and indoor air complaints, whereas acoustical, visual, thermal and social comfort differed statistically significantly between those working in different room types. Compared to other (inpatient) hospital and office studies, the prevalence of symptoms and dissatisfaction with comfort was high, especially dissatisfaction with daylight. Considering the dynamic use of workplaces in outpatient areas and the high ERI, this study reinforces the necessity for inclusion of personal and work-related characteristics in studies on comfort and health of occupants.","Health and comfort; Hospitals' staff; Outpatients areas; Room type; Survey","en","journal article","","","","","","","","","","","Indoor Environment","","",""
"uuid:0416a411-584f-47a4-968c-d82af798dc51","http://resolver.tudelft.nl/uuid:0416a411-584f-47a4-968c-d82af798dc51","Joint migration inversion: Features and challenges","Sun, Yimin (Aramco Overseas Company B.V.); Kim, Young Seo (Saudi Aramco); Qu, S. (TU Delft ImPhys/Computational Imaging; TU Delft ImPhys/Medical Imaging); Verschuur, D.J. (TU Delft ImPhys/Computational Imaging)","","2020","Joint migration inversion is a recently proposed technology, accommodating velocity model building and seismic migration in one integrated process. Different from the widely accepted full waveform inversion technology, it uses imaging parameters, i.e. velocities and reflectivities of the subsurface, to parameterize its solution space. The unique feature of this new technology is its explicit capability to exploit multiples in its inversion scheme, which are treated as noise by most current technologies. In this paper, we comprehensively evaluate the state-of-the-art joint migration inversion technology from various angles: we first benchmark its performance, on both velocity model building and seismic imaging, against that of the well-accepted workflow comprising full waveform inversion and reverse-time migration using a fully controlled 2D realistic synthetic dataset. Next, we demonstrate its application on a 2D field dataset. Last, we use another 2D synthetic dataset to clearly illustrate the challenges the current joint migration inversion technology is facing. With this paper, we transparently reveal the pros of cons of the current joint migration inversion, and we will also point out the imminent research directions joint migration inversion technology should focus on in the next phase for it to be more widely accepted by the geophysics community.","Imaging; Joint migration inversion; Velocity model building","en","journal article","","","","","","","","","","","ImPhys/Computational Imaging","","",""
"uuid:50253f83-5f1f-4bdd-9897-9b31c4a33275","http://resolver.tudelft.nl/uuid:50253f83-5f1f-4bdd-9897-9b31c4a33275","Flame-made amorphous solid acids with tunable acidity for the aqueous conversion of glucose to levulinic acid","Beh, Gein Khai (City University of Hong Kong); Wang, Chang Ting (City University of Hong Kong); Kim, Kyungduk (Institute for Basic Science); Qu, Jiangtao (University of Sydney); Cairney, Julie (University of Sydney); Ng, Yun Hau (City University of Hong Kong); An, Alicia Kyoungjin (City University of Hong Kong); Ryoo, Ryong (Korea Advanced Institute of Science and Technology; Institute for Basic Science); Urakawa, A. (TU Delft ChemE/Catalysis Engineering; Barcelona Institute of Science and Technology (BIST)); Teoh, Wey Yang (City University of Hong Kong; University of New South Wales)","","2020","Solid acids of amorphous silica-alumina (a-SA) and amorphous silica-alumina-phosphate (a-SAPO) were prepared by flame spray pyrolysis (FSP). Careful tuning of the acidity of the solid acids was enabled by capitalizing on the advantage of FSP in preserving the metal stoichiometry (i.e., Si, Al, P) in the product nanoparticles. Although the amount of acids on these non-porous solid acids is an order of magnitude lower than the well-recognized strong acidic ZSM-5 zeolite, both exhibit comparable acid strengths. The a-SA and a-SAPO were characterized by a mixture of Brønsted (B) and Lewis (L) acids, and the B/L ratios were composition-tunable. The highest B/L ratios were recorded for a-SA (Al/(Al + Si) = 0.4) and a-SAPO (Si/(P + Si) = 0.25), giving the highest yields of levulinic acid (≥40% carbon yield) from the conversion of glucose in the aqueous phase without requiring the addition of liquid acids or metal halides. Under the same conditions, the almost exclusive Brønsted acid ZSM-5 yielded only 17% levulinic acid. The FSP-made solid acid catalyst exhibited good reusability over at least 4 consecutive runs.","","en","journal article","","","","","","","","2021-11-14","","","ChemE/Catalysis Engineering","","",""
"uuid:2bd08d43-f8c3-4050-9d5e-f9bdc64926e0","http://resolver.tudelft.nl/uuid:2bd08d43-f8c3-4050-9d5e-f9bdc64926e0","Effect of phosphate availability on biofilm formation in cooling towers","Pinel, I.S.M. (TU Delft BT/Environmental Biotechnology); Kim, Lan Hee (King Abdullah University of Science and Technology); Proença Borges, Vitor R. (King Abdullah University of Science and Technology); Farhat, Nadia M. (King Abdullah University of Science and Technology); Witkamp, Geert Jan (King Abdullah University of Science and Technology); van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology); Vrouwenvelder, J.S. (TU Delft BT/Environmental Biotechnology; King Abdullah University of Science and Technology)","","2020","Phosphate limitation has been suggested as a preventive method against biofilms. P-limited feed water was studied as a preventive strategy against biofouling in cooling towers (CTs). Three pilot-scale open recirculating CTs were operated in parallel for five weeks. RO permeate was fed to the CTs (1) without supplementation (reference), (2) with supplementation by biodegradable carbon (P-limited) and (3) with supplementation of all nutrients (non-P-limited). The P-limited water contained ≤10 µg PO4 l−1. Investigating the CT-basins and coupons showed that P-limited water (1) did not prevent biofilm formation and (2) resulted in a higher volume of organic matter per unit of active biomass compared with the other CTs. Exposure to external conditions and cycle of concentration were likely factors that allowed a P concentration sufficient to cause extensive biofouling despite being the limiting compound. In conclusion, phosphate limitation in cooling water is not a suitable strategy for CT biofouling control.","biofilm composition; Biofouling; microbial community analyses; nutrient limitations; principal component analysis; water quality","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:2cf16bb4-9770-4c83-a72c-3ff180e5b4b5","http://resolver.tudelft.nl/uuid:2cf16bb4-9770-4c83-a72c-3ff180e5b4b5","Circular Water Stories, Worldwide 2 edition: Traditional Water Systems Worldwide 2018/2019 and 2019/2020","Bobbink, I. (TU Delft Landscape Architecture); Rey Hernández, C.D.P. (Student TU Delft); Rivero Lamela, G. (TU Delft Landscape Architecture); Chouairi, A. (Student TU Delft); Di Nicola, C. (Student TU Delft); Gupta, T. (Student TU Delft); Naeema Ali, N. (Student TU Delft); Ayu Tri Prestasia, Ayu (Student TU Delft); Kim, B. (Student TU Delft); Surajaras, R. (Student TU Delft); Lin, M. (Student TU Delft); Zuñiga Blanco, M.J. (Student TU Delft)","","2020","Flowscapes studio - Circular Water Stories lab","","en","book","Delft University of Technology","","","","","","","","","","Landscape Architecture","","",""
"uuid:cec4ad91-c73b-4910-91c1-05418c9187b6","http://resolver.tudelft.nl/uuid:cec4ad91-c73b-4910-91c1-05418c9187b6","Designing for Positive Emotions: Issues and Emerging Research Directions","Yoon, J.K. (Cornell University); Pohlmeyer, A.E. (TU Delft Design Aesthetics); Desmet, P.M.A. (TU Delft Human-Centered Design; TU Delft Design Aesthetics); Kim, C (UNIST, Ulsan)","","2020","ABSTRACT Central to the present paper is the question of how designers can be supported to deliberately facilitate positive emotional experiences. Related to this, the paper provides an overview of the research on design for positive emotions, its issues, and opportunities for further investigations. The practical relevance of transcending the notion of generalised pleasure is discussed, highlighting the benefits of developing and applying a nuanced understanding of positive emotions. Overarching challenges and opportunities that underlie in stimulating such understanding are delineated along with the review of
characteristics of positive emotions. Ethical issues of designing for positive emotions are reflected regarding its implications for well-being with suggestions to resolve them. Besides, the paper discusses emerging research directions,
ranging from design tools to distinguish diverse positive emotions, the added value of exploring expressive interaction qualities of positive emotions, to advantages of involving tool users (e.g., designers and project stakeholders)
in the development process.","design for emotion; emotional design; positive emotions; emotional granularity; user experience; experience design","en","journal article","","","","","","","","2022-06-19","","Human-Centered Design","Design Aesthetics","","",""
"uuid:cc9d0b5e-d6b5-42ae-9355-ffc81bd1267c","http://resolver.tudelft.nl/uuid:cc9d0b5e-d6b5-42ae-9355-ffc81bd1267c","Framing and tracing human-centered design teams' method selection: an examination of decision-making strategies","Rao, Vivek (University of California); Kim, E.Y. (TU Delft Marketing and Consumer Research); Kwon, Jieun (University of Minnesota Twin Cities); Agogino, Alice M. (University of California); Goucher-Lambert, Kosa (University of California)","","2020","Designers’ choices of methods are well known to shape project outcomes. However, questions remain about why design teams select particular methods and how teams’ decision-making strategies are influenced by project- and process-based factors. In this mixed-methods study, we analyze novice design teams’ decision-making strategies underlying 297 selections of human-centered design methods over the course of three semester-long project-based engineering design courses. We propose a framework grounded in 100+ factors sourced from new product development literature that classifies design teams’ method selection strategy as either Agent- (A), Outcome- (O), or Process- (P) driven, with eight further subclassifications. Coding method selections with this framework, we uncover three insights about design team method selection. First, we identify fewer outcomes-based selection strategies across all phases and innovation types. Second, we observe a shift in decision-making strategy from user-focused outcomes in earlier phases to product-based outcomes in later phases. Third, we observe that decision-making strategy produces a greater heterogeneity of method selections as compared to the class average as a whole, or project type alone. These findings provide a deeper understanding of designers’ method selection behavior and have implications for effective management of design teams, development of automated design support tools to aid design teams, and curation of design method repositories","Decision theory; Design education; Design methodology; Design process; Design teams; Design theory; Design theory and methodology; User-centered design","en","journal article","","","","","","","","","","","Marketing and Consumer Research","","",""
"uuid:b74422db-92b5-4a77-b6e0-8a519062763c","http://resolver.tudelft.nl/uuid:b74422db-92b5-4a77-b6e0-8a519062763c","Online characterization of bacterial processes in drinking water systems","Farhat, Nadia (King Abdullah University of Science and Technology); Kim, Lan Hee (King Abdullah University of Science and Technology); Vrouwenvelder, J.S. (TU Delft BT/Environmental Biotechnology; King Abdullah University of Science and Technology)","","2020","The use of traditional drinking water microbial quality monitoring methods, including heterotrophic plate counts (HPCs) and total coliform counts, are not only laborious and time-consuming but also do not readily allow identification of risk areas in the network. Furthermore, if areas of concern are identified, and mitigation measures are taken, it takes days before the effectiveness of these measures is known. This study identified flow cytometry (FCM) as an online sensor technology for bacterial water quality monitoring in the distribution network. We monitored the total bacterial cell numbers and biodiversity in a drinking water distribution system (DWDS) using an online FCM. Two parallel online FCM monitoring systems were installed on two different locations at a drinking water treatment plant (DWTP; Saudi Arabia) supplying chlorinated water to the distribution and in the network 3.6 km away from the DWTP. The FCMs were operated at the same time in parallel to assess the biological stability in DWDSs. The flow cytometric data was compared with the conventional water quality detection methods (HPC and total coliforms). HPC and total coliforms were constantly below the detection limits, while the FCM provided detectable total cell count data and enabled the quantification of changes in the drinking water both with time and during distribution. Results demonstrate the value of FCM as a tool for compliance monitoring and risk assessment of DWDSs.","","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:bd246369-2a6d-4c90-a297-d3789f66a319","http://resolver.tudelft.nl/uuid:bd246369-2a6d-4c90-a297-d3789f66a319","DNA-loop extruding condensin complexes can traverse one another","Kim, E. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Kerssemakers, J.W.J. (TU Delft BN/Technici en Analisten; Kavli institute of nanoscience Delft); Shaltiel, Indra A. (European Molecular Biology Laboratory Heidelberg); Haering, Christian H. (European Molecular Biology Laboratory Heidelberg); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft)","","2020","Condensin, a key component of the structure maintenance of chromosome (SMC) protein complexes, has recently been shown to be a motor that extrudes loops of DNA1. It remains unclear, however, how condensin complexes work together to collectively package DNA into chromosomes. Here we use time-lapse single-molecule visualization to study mutual interactions between two DNA-loop-extruding yeast condensins. We find that these motor proteins, which, individually, extrude DNA in one direction only are able to dynamically change each other’s DNA loop sizes, even when far apart. When they are in close proximity, condensin complexes are able to traverse each other and form a loop structure, which we term a Z-loop—three double-stranded DNA helices aligned in parallel with one condensin at each edge. Z-loops can fill gaps left by single loops and can form symmetric dimer motors that pull in DNA from both sides. These findings indicate that condensin may achieve chromosomal compaction using a variety of looping structures.","","en","journal article","","","","","","Accepted Author Manuscript","","2020-09-04","","","BN/Cees Dekker Lab","","",""
"uuid:55bb2e44-a4b5-4c97-935f-05f6217d4c09","http://resolver.tudelft.nl/uuid:55bb2e44-a4b5-4c97-935f-05f6217d4c09","Solvent-Free Photobiocatalytic Hydroxylation of Cyclohexane","Hobisch, Markus (Aarhus University); van Schie, M.M.C.H. (TU Delft BT/Biocatalysis); Kim, Jinhyun (Korea Advanced Institute of Science and Technology); Røjkjær Andersen, Kasper (Aarhus University); Alcalde, Miguel (C/); Kourist, Robert (Graz University of Technology); Park, Chan Beum (Korea Advanced Institute of Science and Technology); Hollmann, F. (TU Delft BT/Biocatalysis); Kara, S. (TU Delft BT/Biocatalysis; Aarhus University)","","2020","The use of neat reaction media, that is the avoidance of additional solvents, is the simplest and the most efficient approach to follow in biocatalysis. Here, we show that unspecific peroxygenase from Agrocybe aegerita (AaeUPO) can hydroxylate the neat model substrate cyclohexane. H2O2 was photocatalytically generated in situ by nitrogen-doped carbon nanodots (N−CNDs) and UV LED illumination. AaeUPO entrapment in alginate beads increased enzyme stability and facilitated the reaction in neat cyclohexane. N−CNDs absorption in beads containing AaeUPO created a 2-in-1 heterogeneous photobiocatalyst that was active for up to seven days under reaction conditions and produced cyclohexanol, 2.5 mM. To increase productivity, the bead size and the photocatalyst-to-enzyme ratio have been identified as promising targets for optimisation.","carbon nanodots; hydroxylation; non-conventional media; organic media; Photobiocatalysis","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2020-09-16","","","BT/Biocatalysis","","",""
"uuid:b51df5f2-f34a-406a-a385-8fb18d559f1a","http://resolver.tudelft.nl/uuid:b51df5f2-f34a-406a-a385-8fb18d559f1a","Epigenetic profiling demarcates molecular subtypes of muscle-invasive bladder cancer","van der Vos, K.E. (Netherlands Cancer Institute); Vis, D.J. (Netherlands Cancer Institute); Nevedomskaya, E. (Netherlands Cancer Institute); Kim, Y. (Netherlands Cancer Institute); Choi, W. (Johns Hopkins University); McConkey, D. (Johns Hopkins University); Wessels, L.F.A. (TU Delft Pattern Recognition and Bioinformatics; Netherlands Cancer Institute); van Rhijn, B.W.G. (Netherlands Cancer Institute; Antoni van Leeuwenhoek Hospital); Zwart, W. (Netherlands Cancer Institute; Eindhoven University of Technology); van der Heijden, M.S. (Netherlands Cancer Institute)","","2020","Muscle-invasive bladder cancer (MIBC) is a heterogeneous disease that often recurs despite aggressive treatment with neoadjuvant chemotherapy and (radical) cystectomy. Basal and luminal molecular subtypes have been identified that are linked to clinical characteristics and have differential sensitivities to chemotherapy. While it has been suggested that epigenetic mechanisms play a role in defining these subtypes, a thorough understanding of the biological mechanisms is lacking. This report details the first genome-wide analysis of histone methylation patterns of human primary bladder tumours by chromatin immunoprecipitations and next-generation sequencing (ChIP-seq). We profiled multiple histone marks: H3K27me3, a marker for repressed genes, and H3K4me1 and H3K4me3, which are indicators of active enhancers and active promoters. Integrated analysis of ChIP-seq data and RNA sequencing revealed that H3K4 mono-methylation demarcates MIBC subtypes, while no association was found for the other two histone modifications in relation to basal and luminal subtypes. Additionally, we identified differentially methylated H3K4me1 peaks in basal and luminal tumour samples, suggesting that active enhancers play a role in defining subtypes. Our study is the first analysis of histone modifications in primary bladder cancer tissue and provides an important resource for the bladder cancer community.","","en","journal article","","","","","","","","","","","Pattern Recognition and Bioinformatics","","",""
"uuid:4e41f63a-019e-4348-b0f9-235ba40dc0e5","http://resolver.tudelft.nl/uuid:4e41f63a-019e-4348-b0f9-235ba40dc0e5","Piezobiocatalysis: Ultrasound-Driven Enzymatic Oxyfunctionalization of C-H Bonds","Yoon, Jaeho (Korea Advanced Institute of Science and Technology); Kim, Jinhyun (Korea Advanced Institute of Science and Technology); Tieves, F. (TU Delft BT/Biocatalysis); Zhang, W. (TU Delft BT/Biocatalysis); Alcalde, Miguel (C/); Hollmann, F. (TU Delft BT/Biocatalysis); Park, Chan Beum (Korea Advanced Institute of Science and Technology)","","2020","Peroxygenases have long inspired the selective oxyfunctionalization of various aliphatic and aromatic compounds, because of their broad substrate spectrum and simplicity of catalytic mechanism. This study provides a proof-of-concept of piezobiocatalysis by demonstrating peroxygenase-catalyzed oxyfunctionalization reactions fueled by piezocatalytically generated H2O2. Bismuth oxychloride (BiOCl) generated H2O2 in situ via an oxygen reduction reaction under ultrasonic wave conditions. Through the simple combination of water, ultrasound, recombinant, evolved unspecific peroxygenase from Agrocybe aegerita (rAaeUPO), and BiOCl, the piezobiocatalytic platform accelerated selective hydroxylation of ethylbenzene to enantiopure (R)-1-phenylethanol [total turnover number of rAaeUPO (TTNrAaeUPO), 2002; turnover frequency, 77.7 min-1 >99% enantiomeric excess (ee)]. The BiOCl-rAaeUPO couple also catalyzed other representative substrates (e.g., propylbenzene, 1-chloro-4-ethylbenzene, cyclohexane, and cis-β-methylstyrene) with high turnover frequency and selectivity. We alleviated the oxidative stress of piezocatalytically generated OH- on rAaeUPO by spatial separation of rAaeUPO and BiOCl, which resulted in greatly enhanced TTNrAaeUPO of >3900 and the notable prolongation of reaction time. Overall, the BiOCl-rAaeUPO couple serves as a mechanical-to-chemical energy conversion platform for driving peroxygenase-catalyzed reactions under ultrasonic conditions.","oxidation; oxyfunctionalization; peroxygenase; piezobiocatalysis; piezocatalysis","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2020-09-18","","","BT/Biocatalysis","","",""
"uuid:f4a5edc2-37d9-43bd-b99a-40c9cac3eb62","http://resolver.tudelft.nl/uuid:f4a5edc2-37d9-43bd-b99a-40c9cac3eb62","Tetrameric architecture of an active phenol-bound form of the AAA+ transcriptional regulator DmpR","Park, Kwang Hyun (Korea Research Institute of Bioscience and Biotechnology); Kim, S. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Lee, Su Jin (Korea Research Institute of Bioscience and Biotechnology; University of Science and Technology (UST), Daejeon); Cho, Jee Eun (Korea Research Institute of Bioscience and Biotechnology); Patil, Vinod Vikas (Korea Research Institute of Bioscience and Biotechnology; University of Science and Technology (UST), Daejeon); Dumbrepatil, Arti Baban (Korea Research Institute of Bioscience and Biotechnology); Song, Hyung Nam (Korea Research Institute of Bioscience and Biotechnology); Ahn, Woo Chan (Korea Research Institute of Bioscience and Biotechnology); Joo, C. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft)","","2020","The Pseudomonas putida phenol-responsive regulator DmpR is a bacterial enhancer binding protein (bEBP) from the AAA+ ATPase family. Even though it was discovered more than two decades ago and has been widely used for aromatic hydrocarbon sensing, the activation mechanism of DmpR has remained elusive. Here, we show that phenol-bound DmpR forms a tetramer composed of two head-to-head dimers in a head-to-tail arrangement. The DmpR-phenol complex exhibits altered conformations within the C-termini of the sensory domains and shows an asymmetric orientation and angle in its coiled-coil linkers. The structural changes within the phenol binding sites and the downstream ATPase domains suggest that the effector binding signal is propagated through the coiled-coil helixes. The tetrameric DmpR-phenol complex interacts with the σ54 subunit of RNA polymerase in presence of an ATP analogue, indicating that DmpR-like bEBPs tetramers utilize a mechanistic mode distinct from that of hexameric AAA+ ATPases to activate σ54-dependent transcription.","","en","journal article","","","","","","","","","","","BN/Chirlmin Joo Lab","","",""
"uuid:1d7eae95-3bad-48ae-8464-ff9174dd1470","http://resolver.tudelft.nl/uuid:1d7eae95-3bad-48ae-8464-ff9174dd1470","Transparent silicon carbide/tunnel SiO2 passivation for c-Si solar cell front side: Enabling Jsc > 42 mA/cm2 and iVoc of 742 mV","Pomaska, Manuel (Forschungszentrum Jülich GmbH); Köhler, Malte (Forschungszentrum Jülich GmbH); Procel Moya, P.A. (TU Delft Photovoltaic Materials and Devices); Zamchiy, Alexandr (Russian Academy of Sciences); Singh, Aryak (Forschungszentrum Jülich GmbH); Kim, Do Yun (Forschungszentrum Jülich GmbH); Isabella, O. (TU Delft Photovoltaic Materials and Devices); Zeman, M. (TU Delft Electrical Sustainable Energy); Li, Shenghao (Forschungszentrum Jülich GmbH; Sun Yat-sen University)","","2020","N-type microcrystalline silicon carbide (μc-SiC:H(n)) is a wide bandgap material that is very promising for the use on the front side of crystalline silicon (c-Si) solar cells. It offers a high optical transparency and a suitable refractive index that reduces parasitic absorption and reflection losses, respectively. In this work, we investigate the potential of hot wire chemical vapor deposition (HWCVD)–grown μc-SiC:H(n) for c-Si solar cells with interdigitated back contacts (IBC). We demonstrate outstanding passivation quality of μc-SiC:H(n) on tunnel oxide (SiO2)–passivated c-Si with an implied open-circuit voltage of 742 mV and a saturation current density of 3.6 fA/cm2. This excellent passivation quality is achieved directly after the HWCVD deposition of μc-SiC:H(n) at 250°C heater temperature without any further treatments like recrystallization or hydrogenation. Additionally, we developed magnesium fluoride (MgF2)/silicon nitride (SiNx:H)/silicon carbide antireflection coatings that reduce optical losses on the front side to only 0.47 mA/cm2 with MgF2/SiNx:H/μc-SiC:H(n) and 0.62 mA/cm2 with MgF2/μc-SiC:H(n). Finally, calculations with Sentaurus TCAD simulation using MgF2/μc-SiC:H(n)/SiO2/c-Si as front side layer stack in an IBC solar cell reveal a short-circuit current density of 42.2 mA/cm2, an open-circuit voltage of 738 mV, a fill factor of 85.2% and a maximum power conversion efficiency of 26.6%.","antireflecting coating; excellent passivation; heterojunction; hot wire CVD; lean process; refractive index; silicon carbide; tunnel oxide","en","journal article","","","","","","","","","","Electrical Sustainable Energy","Photovoltaic Materials and Devices","","",""
"uuid:268e5f9a-8a6a-413b-a63c-5279af6645c2","http://resolver.tudelft.nl/uuid:268e5f9a-8a6a-413b-a63c-5279af6645c2","Flame retardant property of flax fabrics coated by extracellular polymeric substances recovered from both activated sludge and aerobic granular sludge","Kim, Nam Kyeun (The University of Auckland); Mao, Ningtao (University of Leeds); Lin, Richard (The University of Auckland); Bhattacharyya, Debes (The University of Auckland); van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology); Lin, Y. (TU Delft Environmental Fluid Mechanics)","","2020","In this research, extracellular polymeric substances (EPS), such as EPSflocs and EPSgranules, were successfully extracted from activated and aerobic granular sludge, respectively, and tested as bio-based flame retardant materials. Flax fabric was coated by the biopolymeric substances and its flammability was evaluated based on a vertical burning test defined in US Federal Aviation Regulation. Both EPSflocs and EPSgranules coated flax fabrics achieved the self-extinguishment due to effective char formation. In particular, the result of the EPSgranules coated sample met the aviation requirements for the aircraft interior. Moreover, the presence of carbonated hydroxyapatite was identified in EPSgranules char residue by using FTIR and XRD analysis. It can contribute to the self-extinguishing property of the fabric by enhancing char formation. Thermogravimetric analysis also demonstrated that EPSgranules coated flax was able to produce greater amount of char residue and its decomposition rate was significantly reduced. This research indicates that there is a great potential to use this biopolymer as a resource for developing high performance bio-inspired flame retardant materials and contribute to a circular economy.","Aerobic granular sludge; Extracellular polymeric substance; Flame retardant; Flax fabric","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:6013f1bb-afe9-4280-93cc-98d8479e8568","http://resolver.tudelft.nl/uuid:6013f1bb-afe9-4280-93cc-98d8479e8568","Using immersive virtual reality to support designing skills in vocational education","Kim, Kevin Gonyop (Swiss Federal Institute of Technology); Oertel, Catharine (TU Delft Interactive Intelligence); Dobricki, Martin (Swiss Federal Institute for Vocational Education and Training); Olsen, Jennifer K. (Swiss Federal Institute of Technology); Coppi, Alessia E. (Swiss Federal Institute of Technology); Cattaneo, Alberto (Swiss Federal Institute of Technology); Dillenbourg, Pierre (Swiss Federal Institute of Technology)","","2020","Immersive virtual reality (IVR) offers possibilities of creating a learner-centric environment that can provide more presence and engagement for students leading to an enhanced learning experience compared to conventional classroom practices. However, the potential of IVR in vocational education and training (VET) has not yet been explored in-depth, and it is an open question of whether it can effectively support learner creation in a designing task. In this paper, we present an IVR application developed to support gardener apprentices in designing gardens. Using this application, we conducted an experimental study with gardener apprentices to investigate the effect of the IVR interface compared to paper sketching and learner behavior on the proportion, composition, and creativity of the design outcome. Additionally, we investigated how it can be combined with a paper sketching activity to improve its effectiveness. Our analysis shows that the IVR interface can be more effective for the proportion aspect, but this may be limited to students that are able to use it after working with paper. In terms of the combination order, the effectiveness of IVR on the design quality was improved when it was carried out after the paper sketching and this ordering produced a more effective outcome for the proportion and composition aspects. Finally, our results show that IVR design quality is related to learner behaviors such as the time spent on designing and the number of simulations used. This study demonstrates the effectiveness of IVR applications in supporting designing skills and how effectiveness can be improved by combining it with a conventional method of practice.","","en","journal article","","","","","","","","2022-03-31","","","Interactive Intelligence","","",""
"uuid:899b6bf1-982d-4002-b480-1ac5b1ef2da1","http://resolver.tudelft.nl/uuid:899b6bf1-982d-4002-b480-1ac5b1ef2da1","Algorithmic decomposition for efficient multiple nuclear spin detection in diamond","Oh, Hyunseok (Seoul National University); Yun, Jiwon (Seoul National University); Abobeih, M.H.M.A. (TU Delft QID/Taminiau Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft); Jung, Kyung Hoon (Seoul National University); Kim, Kiho (Seoul National University); Taminiau, T.H. (TU Delft QID/Taminiau Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft); Kim, Dohun (Seoul National University)","","2020","Efficiently detecting and characterizing individual spins in solid-state hosts is an essential step to expand the fields of quantum sensing and quantum information processing. While selective detection and control of a few 13C nuclear spins in diamond have been demonstrated using the electron spin of nitrogen-vacancy (NV) centers, a reliable, efficient, and automatic characterization method is desired. Here, we develop an automated algorithmic method for decomposing spectral data to identify and characterize multiple nuclear spins in diamond. We demonstrate efficient nuclear spin identification and accurate reproduction of hyperfine interaction components for both virtual and experimental nuclear spectroscopy data. We conduct a systematic analysis of this methodology and discuss the range of hyperfine interaction components of each nuclear spin that the method can efficiently detect. The result demonstrates a systematic approach that automatically detects nuclear spins with the aid of computational methods, facilitating the future scalability of devices.","","en","journal article","","","","","","","","","","","QID/Taminiau Lab","","",""
"uuid:35c602af-0719-460d-b169-0510fd89d9fe","http://resolver.tudelft.nl/uuid:35c602af-0719-460d-b169-0510fd89d9fe","Solar-Assisted eBiorefinery: Photoelectrochemical Pairing of Oxyfunctionalization and Hydrogenation Reactions","Choi, Da Som (Korea Advanced Institute of Science and Technology); Kim, Jinhyun (Korea Advanced Institute of Science and Technology); Hollmann, F. (TU Delft BT/Biocatalysis); Park, Chan Beum (Korea Advanced Institute of Science and Technology)","","2020","Inspired by natural photosynthesis, biocatalytic photoelectrochemical (PEC) platforms are gaining prominence for the conversion of solar energy into useful chemicals by combining redox biocatalysis and photoelectrocatalysis. Herein, we report a dual biocatalytic PEC platform consisting of a molybdenum (Mo)-doped BiVO4 (Mo:BiVO4) photoanode and an inverse opal ITO (IO-ITO) cathode that gives rise to the coupling of peroxygenase and ene-reductase-mediated catalysis, respectively. In the PEC cell, the photoexcited electrons generated from the Mo:BiVO4 are transferred to the IO-ITO and regenerate reduced flavin mononucleotides to drive ene-reductase-catalyzed trans-hydrogenation of ketoisophrone to (R)-levodione. Meanwhile, the photoactivated Mo:BiVO4 evolves H2O2 in situ via a two-electron water-oxidation process with the aid of an applied bias, which simultaneously supplies peroxygenases to drive selective hydroxylation of ethylbenzene into enantiopure (R)-1-phenyl-1-hydroxyethane. Thus, the deliberate integration of PEC systems with redox biocatalytic reactions can simultaneously produce valuable chemicals on both electrodes using solar-powered electrons and water.","eBiorefinery; photobiocatalysis; photoelectrochemistry; photosynthesis; redox biocatalysis","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2020-12-03","","","BT/Biocatalysis","","",""
"uuid:dbe628a0-e4dd-449d-94e7-7af8dcd5b990","http://resolver.tudelft.nl/uuid:dbe628a0-e4dd-449d-94e7-7af8dcd5b990","Workshop with 335 primary school children in The Netherlands: What is needed to improve the IEQ in their classrooms?","Bluyssen, P.M. (TU Delft Indoor Environment); Kim, D.H. (TU Delft Indoor Environment); Eijkelenboom, A.M. (TU Delft Indoor Environment); Ortiz, Marco A. (TU Delft Indoor Environment)","","2020","To identify current problems in the classroom and to conceptualize design solutions by primary school children to solve these problems, 335 children from seven primary schools participated in a workshop held in the Experience room of the SenseLab, comprising of two parts. In part 1, the children were asked to think about their own classroom at school and to choose an IEQ-problem in their own classroom that they are bothered with. In part 2 of the workshop, the children were asked to imagine they are an inventor or scientist in 2040 with all resources available and to make a design for the future. The content analysis of the problems and solutions appearing in the drawings and the written text resulted in 5 themes (light, noise, temperature, air and other than IEQ) and 16 sub-themes (11 for the problems and 5 for the solutions). Noise-related problems were most frequently reported (58%), followed by temperature (53%), air (22%), and light (16%). Girls reported more problems than boys, which is possibly related to a better recollection of negative feelings towards those problems in their classrooms. 47% of the children proposed solutions related to more than one IEQ-problem. Solutions ranged from existing solutions, for example headphones to protect against noise to far-fetched solutions such as send noisy children away by means of a rocket. The outcome showed that children can be valuable contributors in co-designing ‘new’ or ‘adapted’ classroom environments.","Classroom; Generative tools; Indoor environmental quality; Primary school children; Workshop","en","journal article","","","","","","","","","","","Indoor Environment","","",""
"uuid:f119c751-9a8b-47ae-a831-1d10c5f9518a","http://resolver.tudelft.nl/uuid:f119c751-9a8b-47ae-a831-1d10c5f9518a","Missing-data handling methods for lifelogs-based wellness index estimation: Comparative analysis with panel data","Kim, K. (TU Delft Methodologie en Organisatie van Design; Ulsan National Institute of Science and Technology); KIM, K.J. (Pohang University of Science and Technology)","","2020","Background: A lifelogs-based wellness index (LWI) is a function for calculating wellness scores based on health behavior lifelogs (eg, daily walking steps and sleep times collected via a smartwatch). A wellness score intuitively shows the users of smart wellness services the overall condition of their health behaviors. LWI development includes estimation (ie, estimating coefficients in LWI with data). A panel data set comprising health behavior lifelogs allows LWI estimation to control for unobserved variables, thereby resulting in less bias. However, these data sets typically have missing data due to events that occur in daily life (eg, smart devices stop collecting data when batteries are depleted), which can introduce biases into LWI coefficients. Thus, the appropriate choice of method to handle missing data is important for reducing biases in LWI estimations with panel data. However, there is a lack of research in this area. Objective: This study aims to identify a suitable missing-data handling method for LWI estimation with panel data. Methods: Listwise deletion, mean imputation, expectation maximization-based multiple imputation, predictive-mean matching-based multiple imputation, k-nearest neighbors-based imputation, and low-rank approximation-based imputation were comparatively evaluated by simulating an existing case of LWI development. A panel data set comprising health behavior lifelogs of 41 college students over 4 weeks was transformed into a reference data set without any missing data. Then, 200 simulated data sets were generated by randomly introducing missing data at proportions from 1% to 80%. The missing-data handling methods were each applied to transform the simulated data sets into complete data sets, and coefficients in a linear LWI were estimated for each complete data set. For each proportion for each method, a bias measure was calculated by comparing the estimated coefficient values with values estimated from the reference data set. Results: Methods performed differently depending on the proportion of missing data. For 1% to 30% proportions, low-rank approximation-based imputation, predictive-mean matching-based multiple imputation, and expectation maximization-based multiple imputation were superior. For 31% to 60% proportions, low-rank approximation-based imputation and predictive-mean matching-based multiple imputation performed best. For over 60% proportions, only low-rank approximation-based imputation performed acceptably. Conclusions: Low-rank approximation-based imputation was the best of the 6 data-handling methods regardless of the proportion of missing data. This superiority is generalizable to other panel data sets comprising health behavior lifelogs given their verified low-rank nature, for which low-rank approximation-based imputation is known to perform effectively. This result will guide missing-data handling in reducing coefficient biases in new development cases of linear LWIs with panel data.","Health behavior lifelogs; Lifelogs-based wellness index; Missing-data handling; Panel data; Smart wellness service; OA-Fund TU Delft","en","journal article","","","","","","","","","","","Methodologie en Organisatie van Design","","",""
"uuid:e653f38f-3a39-4c0e-bcae-5f8fe9e2387c","http://resolver.tudelft.nl/uuid:e653f38f-3a39-4c0e-bcae-5f8fe9e2387c","Estimation of Facial Contact Pressure Based on Finite Element Analysis","Lee, W. (Handong Global University); Kim, Jin-Gyun (Hyung Hee University); Molenbroek, J.F.M. (TU Delft Applied Ergonomics and Design); Goossens, R.H.M. (TU Delft Applied Ergonomics and Design); You, Heecheon (Pohang University of Science and Technology)","Di Nicolantonio, Massimo (editor); Rossi, Emilio (editor); Alexander, Thomas (editor)","2020","A 3D head and face scan data can be usefully applied in the ergonomic design of a wearable product such as an oxygen mask or a virtual reality (VR) headset to support the safety as well as comfort for a certain amount of a target population. This study is aimed to develop analysis and design methods of an ergonomic facial wearable products (e.g., pilot oxygen mask, VR headsets) based on numerous 3D face scan data (366 faces and 2,299 heads) through the template registration and the finite element (FE) analysis methods to predict the contact pressure between the face and a product. The application of the FE analysis on numerous 3D images to find an optimal form of a product is a novel approach in product design. The proposed methods on contact pressure analysis could be usefully applied for wearable products, which fit body parts.","Contact pressure estimation; Ergonomic product design; Face; Finite element analysis","en","conference paper","Springer","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2019-12-01","","","Applied Ergonomics and Design","","",""
"uuid:63f16f41-e9da-4f5d-9f76-251d433b394b","http://resolver.tudelft.nl/uuid:63f16f41-e9da-4f5d-9f76-251d433b394b","Genomic data integration by WON-PARAFAC identifies interpretable factors for predicting drug-sensitivity in vivo","Kim, Yongsoo (Netherlands Cancer Institute; Amsterdam UMC); Bismeijer, Tycho (Netherlands Cancer Institute); Zwart, Wilbert (Netherlands Cancer Institute; Eindhoven University of Technology); Wessels, L.F.A. (TU Delft Pattern Recognition and Bioinformatics; Netherlands Cancer Institute); Vis, Daniel J. (Netherlands Cancer Institute)","","2019","Integrative analyses that summarize and link molecular data to treatment sensitivity are crucial to capture the biological complexity which is essential to further precision medicine. We introduce Weighted Orthogonal Nonnegative parallel factor analysis (WON-PARAFAC), a data integration method that identifies sparse and interpretable factors. WON-PARAFAC summarizes the GDSC1000 cell line compendium in 130 factors. We interpret the factors based on their association with recurrent molecular alterations, pathway enrichment, cancer type, and drug-response. Crucially, the cell line derived factors capture the majority of the relevant biological variation in Patient-Derived Xenograft (PDX) models, strongly suggesting our factors capture invariant and generalizable aspects of cancer biology. Furthermore, drug response in cell lines is better and more consistently translated to PDXs using factor-based predictors as compared to raw feature-based predictors. WON-PARAFAC efficiently summarizes and integrates multiway high-dimensional genomic data and enhances translatability of drug response prediction from cell lines to patient-derived xenografts.","","en","journal article","","","","","","","","","","","Pattern Recognition and Bioinformatics","","",""
"uuid:18b44c52-4472-4729-b48b-106f4d52bb3b","http://resolver.tudelft.nl/uuid:18b44c52-4472-4729-b48b-106f4d52bb3b","Evaluation of Drying and Anatomical Characteristic of Mongolian Oak Lumber by Kiln Drying due to storage time after sawing: Poster presentation","Chang, Yoon-Seong (National Institute of Forest Science); Kim, Min-Ji (National Institute of Forest Science); Shin, Hyun-Kyeong (National Institute of Forest Science); Han, Yeonjung (National Institute of Forest Science)","","2019","Based on the 2017 statistics of the Korea Forest Service, the amount of annual production of domestic roundwood was 4.5 million ㎥. Twenty eight percent of the production was hardwood roundwood. About 80% of the hardwood was Quercus species. The hardwood roundwoods were mainly used for wood chips (50%) and medium density fiberboard (MDF)(26%). Only 6% of the hardwood roundwoods were used for sawn timber. Most of oak forests in Korea were not managed well. Therefore, diameter of oak trees was relatively small with lots of flaws, such as inside decay, discoloration etc., since many of them were reproduced by sprout forest. Oak trees produced from unmanaged forests are prone to drying defects. To overcome this proneness, drying and anatomical characteristic of Mongolian Oak (Quercus mongolica) lumber (thickness 30 ㎜ x width 100 ㎜ x length 1,900 ㎜) were investigated in this study. Shrinkage and color difference (E) due to kiln dry was measured. In order to evaluate drying defects, the degree of surface check was investigated. Warp of lumber, such as cup, bow, crook, and twist, were also measured after drying process. Tylosis formation between one month and six months after sawing was observed microscopically. In order to develop value-added products from domestic oaks, the yield rate from standing tree to the flooring board were calculated. It is expected that efficient production plan for the value added products from domestic oak species would be proposed based on the results of this study, which are not being used as commercial sawn timber in Korea currently.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:4392ea3a-d938-4841-8e48-35671142d2b6","http://resolver.tudelft.nl/uuid:4392ea3a-d938-4841-8e48-35671142d2b6","Nicotinamide adenine dinucleotide as a photocatalyst","Kim, Jinhyun (Korea Advanced Institute of Science and Technology); Lee, Sahng Ha (Korea Advanced Institute of Science and Technology); Tieves, F. (TU Delft BT/Biocatalysis); Paul, C.E. (TU Delft BT/Biocatalysis); Hollmann, F. (TU Delft BT/Biocatalysis); Park, Chan Beum (Korea Advanced Institute of Science and Technology)","","2019","Nicotinamide adenine dinucleotide (NAD+) is a key redox compound in all living cells responsible for energy transduction, genomic integrity, life-span extension, and neuromodulation. Here, we report a new function of NAD+ as a molecular photocatalyst in addition to the biological roles. Our spectroscopic and electrochemical analyses reveal light absorption and electronic properties of two p-conjugated systems of NAD+. Furthermore, NAD+ exhibits a robust photostability under UV-Vis-NIR irradiation. We demonstrate photocatalytic redox reactions driven by NAD+, such as O2 reduction, H2O oxidation, and the formation of metallic nanoparticles. Beyond the traditional role of NAD+ as a cofactor in redox biocatalysis, NAD+ executes direct photoactivation of oxidoreductases through the reduction of enzyme prosthetic groups. Consequently, the synergetic integration of biocatalysis and photocatalysis using NAD+ enables solar-to-chemical conversion with the highest-ever-recorded turnover frequency and total turnover number of 1263.4 hour−1 and 1692.3, respectively, for light-driven biocatalytic trans-hydrogenation.","","en","journal article","","","","","","","","","","","BT/Biocatalysis","","",""
"uuid:371a3832-6ec4-4fb5-985d-6bc80f447039","http://resolver.tudelft.nl/uuid:371a3832-6ec4-4fb5-985d-6bc80f447039","Beyond Explicit Reports: Comparing Data-Driven Approaches to Studying Underlying Dimensions of Music Preference","Kim, Jaehun (TU Delft Multimedia Computing); Manolios, S. (TU Delft Multimedia Computing); Demetriou, A.M. (TU Delft Multimedia Computing); Liem, C.C.S. (TU Delft Multimedia Computing)","","2019","Prior research from the field of music psychology has suggested that there are factors common to music preference beyond individual genres. Specifically, research has shown that self-reported ratings of preference for individual musical genres can be reduced to 4 or 5 dimensions, which in turn have been shown to correlate to relevant psychological constructs, such as personality. However, the number of dimensions emerging from multiple studies has varied despite the care taken in conducting such research. Data-driven approaches offer opportunities to further this line of research with actual listening data, at a scale and scope surpassing that of traditional psychological studies. Although listening data can be considered more direct and comprehensive evidence of listening preference, transforming this data into meaningful measurements is non-trivial. In the current paper, we report on investigations seeking to find interpretable underlying dimensions of music taste, using implicit large-scale listening data. Offering a critical reflection on potential researchers' degrees of freedom, we adopt an explicit systematic approach, investigating the impact of varying different parameters, analysis, and normalization techniques. More precisely, we consider various ways to extract listening preference information from two large, openly available datasets of music listening behavior, making use of principal component analysis and variational autoencoders to extract potential underlying dimensions. Results and implications are discussed in light of prior psychological theory, and the potential of user listening data to further research on music preference.","Latent factor models; Listening behavior; Multidisciplinary approaches; Music preferences; OA-Fund TU Delft","en","conference paper","Association for Computing Machinery (ACM)","","","","","","","","","","Multimedia Computing","","",""
"uuid:75e7fd39-b45a-4af7-94b7-5d1a0c94e64e","http://resolver.tudelft.nl/uuid:75e7fd39-b45a-4af7-94b7-5d1a0c94e64e","Study of the performance of automatic speech recognition systems in speakers with Parkinson’s Disease","Moro-Velazquez, Laureano (Johns Hopkins University); Cho, JaeJin (Johns Hopkins University); Watanabe, Shinji (Johns Hopkins University); Hasegawa-Johnson, Mark A. (University of Illinois at Urbana-Champaign); Scharenborg, O.E. (TU Delft Multimedia Computing); Kim, Heejin (University of Illinois at Urbana-Champaign); Dehak, Najim (Johns Hopkins University)","Kubin, G. (editor); Hain, T. (editor); Schuller, B. (editor); Zarka, D.E. (editor); Hodl, P. (editor)","2019","Parkinson’s Disease (PD) affects motor capabilities of patients, who in some cases need to use human-computer assistive technologies to regain independence. The objective of this work is to study in detail the differences in error patterns from state-of-the-art Automatic Speech Recognition (ASR) systems on speech from people with and without PD. Two different speech recognizers (attention-based end-to-end and Deep Neural Network - Hidden Markov Models hybrid systems) were trained on a Spanish language corpus and subsequently tested on speech from 43 speakers with PD and 46 without PD. The differences related to error rates, substitutions, insertions and deletions of characters and phonetic units between the two groups were analyzed, showing that the word error rate is 27% higher in speakers with PD than in control speakers, with a moderated correlation between that rate and the developmental stage of the disease. The errors were related to all manner classes, and were more pronounced in the vowel /u/. This study is the first to evaluate ASR systems’ responses to speech from patients at different stages of PD in Spanish. The analyses showed general trends but individual speech deficits must be studied in the future when designing new ASR systems for this population.","Automatic speech recognition; Deep neural networks; Dysarthria; Parkinson's disease; Word error rate","en","conference paper","ISCA","","","","","","","","","","Multimedia Computing","","",""
"uuid:c5707ca7-f7db-4596-bb04-2efb6fc05f3a","http://resolver.tudelft.nl/uuid:c5707ca7-f7db-4596-bb04-2efb6fc05f3a","First SenseLab studies with primary school children: exposure to different environmental configurations in the experience room","Bluyssen, P.M. (TU Delft Indoor Environment); Zhang, D. (TU Delft Indoor Environment); Kim, D.H. (TU Delft Indoor Environment); Eijkelenboom, A.M. (TU Delft Indoor Environment); Ortiz, Marco A. (TU Delft Indoor Environment)","","2019","To study the combined effect of different environmental factors on children in a classroom setting, 250 children from seven primary schools were exposed to 36 different environmental configurations (‘all’ and ‘fewer’ acoustical panels; ‘displacement’ and ‘mixing’ ventilation; sound type: ‘children talk’, ‘traffic’, and ‘none’; and ‘direct’, ‘indirect’ and ‘soft’ lighting). In a four-way factorial design, they assessed with 18 groups on eight different days temperature, draught, noise, light and smell. Correlation, three-way ANOVA, comparison tests and multi-regression analysis were used to analyse relationships, and main, cross-modal and interaction effects. The results show that more acoustical panels had a positive effect on the children’s assessment of sound. Sound type had a main effect on the assessment of sound. Statistical significant cross-modal effects were found for lighting and sound type on the assessment of smell. Significant three-way interactions between ‘Vent’, ‘Sound’, and ‘Light’ types were found for smell and light in the ‘fewer panels’ situations; and for light in the ‘all panels’ situations. Multiple-regression analysis also showed that perception of smell was significantly related with draught, sound and light perception in ‘fewer panels’ conditions. Further studies on these cross-modal interactions are recommended, specifically at individual level.","combined effect; different environmental configurations; lab study; perceived indoor environmental qualities; perception; Primary school children","en","journal article","","","","","","","","","","","Indoor Environment","","",""
"uuid:a119583d-7c81-4ef7-9966-95d74905bd49","http://resolver.tudelft.nl/uuid:a119583d-7c81-4ef7-9966-95d74905bd49","Are Nearby Neighbors Relatives?: Testing Deep Music Embeddings","Kim, Jaehun (TU Delft Multimedia Computing); Urbano, Julián (TU Delft Multimedia Computing); Liem, C.C.S. (TU Delft Multimedia Computing); Hanjalic, A. (TU Delft Intelligent Systems)","","2019","Deep neural networks have frequently been used to directly learn representations useful for a given task from raw input data. In terms of overall performance metrics, machine learning solutions employing deep representations frequently have been reported to greatly outperform those using hand-crafted feature representations. At the same time, they may pick up on aspects that are predominant in the data, yet not actually meaningful or interpretable. In this paper, we therefore propose a systematic way to test the trustworthiness of deep music representations, considering musical semantics. The underlying assumption is that in case a deep representation is to be trusted, distance consistency between known related points should be maintained both in the input audio space and corresponding latent deep space. We generate known related points through semantically meaningful transformations, both considering imperceptible and graver transformations. Then, we examine within- and between-space distance consistencies, both considering audio space and latent embedded space, the latter either being a result of a conventional feature extractor or a deep encoder. We illustrate how our method, as a complement to task-specific performance, provides interpretable insight into what a network may have captured from training data signals.","MFCC; evaluation; music information retrieval; neural network; representation learning","en","journal article","","","","","","","","","","Intelligent Systems","Multimedia Computing","","",""
"uuid:a2f8d1e9-a152-4da9-b345-b9012869e434","http://resolver.tudelft.nl/uuid:a2f8d1e9-a152-4da9-b345-b9012869e434","Optimized ChIP-seq method facilitates transcription factor profiling in human tumors","Singh, Abhishek A. (Netherlands Cancer Institute); Schuurman, Karianne (Netherlands Cancer Institute); Nevedomskaya, Ekaterina (Netherlands Cancer Institute); Stelloo, Suzan (Netherlands Cancer Institute); Linder, Simon (Netherlands Cancer Institute); Droog, Marjolein (Netherlands Cancer Institute); Kim, Yongsoo (Netherlands Cancer Institute); Sanders, Joyce (Netherlands Cancer Institute); van der Poel, Henk (Netherlands Cancer Institute); Bergman, Andries M. (Netherlands Cancer Institute); Wessels, L.F.A. (TU Delft Pattern Recognition and Bioinformatics; Netherlands Cancer Institute); Zwart, Wilbert (Netherlands Cancer Institute; Eindhoven University of Technology)","","2019","Chromatin immunoprecipitation (ChIP)-seq analyses of transcription factors in clinical specimens are challenging due to the technical limitations and low quantities of starting material, often resulting in low enrichments and poor signal-to-noise ratio. Here, we present an optimized protocol for transcription factor ChIP-seq analyses in human tissue, yielding an ~100% success rate for all transcription factors analyzed. As proof of concept and to illustrate general applicability of the approach, human tissue from the breast, prostate, and endometrial cancers were analyzed. In addition to standard formaldehyde fixation, disuccinimidyl glutarate was included in the procedure, greatly increasing data quality. To illustrate the sensitivity of the optimized protocol, we provide high-quality ChIP-seq data for three independent factors (AR, FOXA1, and H3K27ac) from a single core needle prostate cancer biopsy specimen. In summary, double-cross-linking strongly improved transcription factor ChIP-seq quality on human tumor samples, further facilitating and enhancing translational research on limited amounts of tissue.","","en","journal article","","","","","","","","","","","Pattern Recognition and Bioinformatics","","",""
"uuid:cfab5904-3462-40c3-9096-aabe42b659dc","http://resolver.tudelft.nl/uuid:cfab5904-3462-40c3-9096-aabe42b659dc","One deep music representation to rule them all? A comparative analysis of different representation learning strategies","Kim, Jaehun (TU Delft Multimedia Computing); Urbano, Julián (TU Delft Multimedia Computing); Liem, C.C.S. (TU Delft Multimedia Computing); Hanjalic, A. (TU Delft Intelligent Systems)","","2019","Inspired by the success of deploying deep learning in the fields of Computer Vision and Natural Language Processing, this learning paradigm has also found its way into the field of Music Information Retrieval. In order to benefit from deep learning in an effective, but also efficient manner, deep transfer learning has become a common approach. In this approach, it is possible to reuse the output of a pre-trained neural network as the basis for a new learning task. The underlying hypothesis is that if the initial and new learning tasks show commonalities and are applied to the same type of input data (e.g., music audio), the generated deep representation of the data is also informative for the new task. Since, however, most of the networks used to generate deep representations are trained using a single initial learning source, their representation is unlikely to be informative for all possible future tasks. In this paper, we present the results of our investigation of what are the most important factors to generate deep representations for the data and learning tasks in the music domain. We conducted this investigation via an extensive empirical study that involves multiple learning sources, as well as multiple deep learning architectures with varying levels of information sharing between sources, in order to learn music representations. We then validate these representations considering multiple target datasets for evaluation. The results of our experiments yield several insights into how to approach the design of methods for learning widely deployable deep data representations in the music domain.","Multitask learning; Music Information Retrieval; Representation learning","en","journal article","","","","","","","","","","Intelligent Systems","Multimedia Computing","","",""
"uuid:45f74cc8-b9d6-4024-a94a-ad9ab49f4f81","http://resolver.tudelft.nl/uuid:45f74cc8-b9d6-4024-a94a-ad9ab49f4f81","A 5800-μ m 2Resistor-Based Temperature Sensor with a One-Point Trimmed Inaccuracy of ±1.2 °c (3σ) From-50 °c to 105 °c in 65-nm CMOS","Lee, Yongtae (Yonsei University); Choi, Woojun (Yonsei University); Kim, Taewoong (Yonsei University); Song, Seungwoo (Yonsei University); Makinwa, K.A.A. (TU Delft Microelectronics); Chae, Youngcheol (Yonsei University)","","2019","This letter describes a compact resistor-based temperature sensor intended for the thermal monitoring of microprocessors and DRAMs. It consists of an RC poly phase filter (PPF) that is read out by a frequency-locked loop (FLL) based on a dual zero-crossing (ZC) detection scheme. The sensor, fabricated in 65-nm CMOS, occupies 5800 μ m2 and achieves moderate accuracy [±1.2 °C (3 σ)] over a wide temperature range (-50 °C to 105 °C) after a one-point trim. This is 2× better than the previous compact resistor-based sensors. Operating from 0.85 to 1.3-V supplies, it consumes 32.5-μ A and achieves 2.8-mK resolution in a 1-ms conversion time, which corresponds to a resolution FoM of 0.26 pJ K2.","CMOS temperature sensor; RC poly phase filter (PPF); dual zero-crossing (ZC) detection; frequency-locked loop (FLL); one-point trim; resistor-based temperature sensor","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2022-03-25","","Microelectronics","","","",""
"uuid:c0d93997-7a3e-4686-b408-c202d280fbfe","http://resolver.tudelft.nl/uuid:c0d93997-7a3e-4686-b408-c202d280fbfe","Make Some Noise: Unleashing the Power of Convolutional Neural Networks for Profiled Side-channel Analysis","Kim, Jaehun (TU Delft Multimedia Computing); Picek, S. (TU Delft Cyber Security); Heuser, Annelie (INRIA/IRISA); Bhasin, Shivam (Nanyang Technological University); Hanjalic, A. (TU Delft Intelligent Systems)","","2019","Profiled side-channel analysis based on deep learning, and more precisely Convolutional Neural Networks, is a paradigm showing significant potential. The results, although scarce for now, suggest that such techniques are even able to break cryptographic implementations protected with countermeasures. In this paper, we start by proposing a new Convolutional Neural Network instance able to reach high performance for a number of considered datasets. We compare our neural network with the one designed for a particular dataset with masking countermeasure and we show that both are good designs but also that neither can be considered as a superior to the other one.
Next, we address how the addition of artificial noise to the input signal can be actually beneficial to the performance of the neural network. Such noise addition is equivalent to the regularization term in the objective function. By using this technique, we are able to reduce the number of measurements needed to reveal the secret key by orders of magnitude for both neural networks. Our new convolutional neural network instance with added noise is able to break the implementation protected with the random delay countermeasure by using only 3 traces in the attack phase. To further strengthen our experimental results, we investigate the performance with a varying number of training samples, noise levels, and epochs. Our findings show that adding noise is beneficial throughout all training set sizes and epochs.
studies have shown that design is not easily permeating into everyday practice of public organizations. This research therefore aims to understand what the current practice of
design-embedding in government is like and its limitations by interviewing six experts in the design for government field. The research findings reveal that the changes created by the current design-embedding practice in government are not being actively sustained or amplified. Based on an understanding of organisations as complex systems, we suggest a further practice of design-embedding in which designers steward and stimulate design-led change energy within public organizations. This study shows that embedding design capability in professional organizations is more about design-led organizational change than passing on a design skillset to the organizational members.","Embedding design in government; design capability building; design-led organizational change; Complex Systems; design for policy","en","conference paper","The Academy for Design Innovation Management","","","","","","","","","","Methodologie en Organisatie van Design","","",""
"uuid:87f56f82-f9d9-4bfa-ba21-22f6e3fc2cc5","http://resolver.tudelft.nl/uuid:87f56f82-f9d9-4bfa-ba21-22f6e3fc2cc5","Insignificant impact of chemotactic responses of Pseudomonas aeruginosa on the bacterial attachment to organic pre-conditioned RO membranes","Kim, Lan Hee (King Abdullah University of Science and Technology); Vrouwenvelder, J.S. (TU Delft BT/Environmental Biotechnology; King Abdullah University of Science and Technology)","","2019","We investigated the impact of conditioning compositions on the way bacteria move and adhere to reverse osmosis (RO) membranes that have been pre-conditioned by organic compounds. We used humic acid (HA), bovine serum albumin (BSA), and sodium alginate (SA) to simulate conditioning layers on the RO membranes. First, we investigated the chemotactic responses of Pseudomonas aeruginosa PAO1 to the organic substances and the impact of changes in physicochemical characteristics of pre-conditioned membranes on bacterial attachment. Second, we observed bacterial attachment under the presence or absence of nutrients or microbial metabolic activity. Results showed that there was no relationship between the chemotactic response of P. aeruginosa PAO1 and the organic substances, and the changes in hydrophobicity, surface free energy, and surface charge resulting from changing the composition of the conditioning layer did not seem to affect bacterial attachment, whereas changing the roughness of the conditioned membrane exponentially did (exponential correlation coefficient, R2 = 0.85). We found that the initial bacterial attachment on the membrane surface is influenced by (i) the nutrients in the feed solution and (ii) the microbial metabolic activity, whereas the chemotaxis response has a negligible impact. This study would help to establish a suitable strategy to manage bacterial attachment.","Chemotaxis; Conditioning film; Pseudomonas aeruginosa PAO1; Reverse osmosis membrane","en","journal article","","","","","","","","","","","BT/Environmental Biotechnology","","",""
"uuid:56df012b-a1b5-4503-86b9-14e41cfd13ec","http://resolver.tudelft.nl/uuid:56df012b-a1b5-4503-86b9-14e41cfd13ec","A 5800-μm2 Resistor-Based Temperature Sensor with a One-Point Trimmed Inaccuracy of ±1.2 °c (3σ) from -50 °c to 105 °c in 65-nm CMOS","Lee, Yongtae (Yonsei University); Choi, Woojun (Yonsei University); Kim, Taewoong (Yonsei University); Song, Seungwoo (Yonsei University); Makinwa, K.A.A. (TU Delft Microelectronics); Chae, Youngcheol (Yonsei University)","","2019","This letter describes a compact resistor-based temperature sensor intended for the thermal monitoring of microprocessors and DRAMs. It consists of an RC poly phase filter (PPF) that is read out by a frequency-locked loop (FLL) based on a dual zero-crossing (ZC) detection scheme. The sensor,fabricated in 65-nm CMOS,occupies 5800 μm2 and achieves moderate accuracy [±1.2 °C (3σ)] over a wide temperature range (-50 °C to 105 °C) after a one-point trim. This is 2× better than the previous compact resistor-based sensors. Operating from 0.85 to 1.3-V supplies,it consumes 32.5-μA and achieves 2.8-mK resolution in a 1-ms conversion time,which corresponds to a resolution FoM of 0.26 pJ•K2.","CMOS temperature sensor; dual zero-crossing (ZC) detection; frequency-locked loop (FLL); one-point trim; RC poly phase filter (PPF); resistor-based temperature sensor.","en","conference paper","Institute of Electrical and Electronics Engineers (IEEE)","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2022-03-25","","Microelectronics","","","",""
"uuid:6bed16e9-bf9d-4fab-aad0-3b52d90136e4","http://resolver.tudelft.nl/uuid:6bed16e9-bf9d-4fab-aad0-3b52d90136e4","Distinct Roles for Condensin's Two ATPase Sites in Chromosome Condensation","Elbatsh, Ahmed M.O. (Netherlands Cancer Institute); Kim, E. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Eeftens, J.M. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Raaijmakers, Jonne A. (Netherlands Cancer Institute); van der Weide, Robin H. (Netherlands Cancer Institute); García-Nieto, Alberto (Netherlands Cancer Institute); Bravo, Sol (European Molecular Biology Laboratory Heidelberg); Ganji, M. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft)","","2019","Condensin is a conserved SMC complex that uses its ATPase machinery to structure genomes, but how it does so is largely unknown. We show that condensin's ATPase has a dual role in chromosome condensation. Mutation of one ATPase site impairs condensation, while mutating the second site results in hyperactive condensin that compacts DNA faster than wild-type, both in vivo and in vitro. Whereas one site drives loop formation, the second site is involved in the formation of more stable higher-order Z loop structures. Using hyperactive condensin I, we reveal that condensin II is not intrinsically needed for the shortening of mitotic chromosomes. Condensin II rather is required for a straight chromosomal axis and enables faithful chromosome segregation by counteracting the formation of ultrafine DNA bridges. SMC complexes with distinct roles for each ATPase site likely reflect a universal principle that enables these molecular machines to intricately control chromosome architecture.","ABC ATPase; chromosome condensation; cohesin; condensin; DNA loop extrusion; SMC complexes","en","journal article","","","","","","","","","","","BN/Cees Dekker Lab","","",""
"uuid:d744a5b8-46c9-4696-a8d2-4d9f5149a58c","http://resolver.tudelft.nl/uuid:d744a5b8-46c9-4696-a8d2-4d9f5149a58c","Porous Metal-Organic Framework CUK-1 for Adsorption Heat Allocation toward Green Applications of Natural Refrigerant Water","Lee, Ji Sun (Korea Research Institute Chemical Technology); Yoon, Ji Woong (Korea Research Institute Chemical Technology); Mileo, Paulo G.M. (Institut Charles Gerhardt Montpellier); Cho, Kyung Ho (Korea Research Institute Chemical Technology); Park, Jaedeuk (Korea Research Institute Chemical Technology); Kim, Kiwoong (Korea Research Institute Chemical Technology); Kim, Hyungjun (Korea Advanced Institute of Science and Technology); de Lange, M.F. (Student TU Delft); Kapteijn, F. (TU Delft ChemE/Catalysis Engineering)","","2019","The development of new water adsorbents that are hydrothermally stable and can operate more efficiently than existing materials is essential for the advancement of water adsorption-driven chillers. Most of the existing benchmark materials and related systems in this field suffer from clear limitations that must be overcome to meet global requirements for sustainable and green energy production and utilization. Here, we report the energy-efficient water sorption properties of three isostructural metal-organic frameworks (MOFs) based on the simple ligand pyridine-2,4-dicarboxylate, named M-CUK-1 [M3(μ3-OH)2(2,4-pdc)2] (where M = Co2+, Ni2+, or Mg2+). The highly hydrothermally stable CUK-1 series feature step-like water adsorption isotherms, relatively high H2O sorption capacities between P/P0 = 0.10-0.25, stable cycling, facile regeneration, and, most importantly, benchmark coefficient of performance values for cooling and heating at a low driving temperature. Furthermore, these MOFs are prepared under green hydrothermal conditions in aqueous solutions. Our joint experimental-computational approach revealed that M-CUK-1 integrates several optimal features, resulting in promising materials as advanced water adsorbents for adsorption-driven cooling and heating applications.","M-CUK-1; SAPO-34; coefficient of performance; metal-organic framework; water sorption","en","journal article","","","","","","Accepted Author Manuscript","","2020-07-01","","","ChemE/Catalysis Engineering","","",""
"uuid:2cf0d88e-374e-4eff-ac34-cfea20a7b9ac","http://resolver.tudelft.nl/uuid:2cf0d88e-374e-4eff-ac34-cfea20a7b9ac","Ontological engineering for supporting semantic reasoning in design: deriving models based on ontologies for supporting engineering design","Demoly, Frédéric (Université de Bourgogne); Kim, Kyoung Yun (Wayne State University); Horvath, I. (TU Delft Cyber-Physical Systems)","","2019","","","en","contribution to periodical","","","","","","","","","","","Cyber-Physical Systems","","",""
"uuid:a99cc4d6-1594-46b6-9afb-282e5f022f00","http://resolver.tudelft.nl/uuid:a99cc4d6-1594-46b6-9afb-282e5f022f00","Investigation on band segregate formation during the electroslag remelting of H13 die steel","Kim, K.H. (TU Delft (OLD) MSE-3; Wuhan University of Science and Technology); Wang, X. J. (Wuhan University of Science and Technology); Li, G. Q. (Wuhan University of Science and Technology); Liu, Y. (Wuhan University of Science and Technology)","","2019","Band segregation has been found in the H13 die steel produced by the electroslag remelting (ESR) technology. Chemical and metallographic studies have been carried out on a one ton ESR ingot of H13 die steel, so as to understand the formation mechanism of the band segregation. The results indicate that the T.O content and S content decreased because of cleanliness improvement of ESR process. Transverse macrosegregation of S content decreased after ESR. The overall removal ratio of the inclusion is around 65.8%. The original complex inclusions would be modified to the CaO•Al2O3 inclusions. Al2O3 and MnS inclusions can be found after ESR. Both of Al2O3 and MnS inclusions were found to be the core of primary carbides. The net like structure in ESR ingot and banded structure in the forged steel were observed. V, Mo, Cr and S are rich in the segregation areas of ESR ingot. Besides, black and white segregation bands can be observed on the forged steel samples after etching. Uneven distribution of carbides rich in V, Mo and Cr was observed in banded structure.","","en","journal article","","","","","","","","","","","(OLD) MSE-3","","",""
"uuid:cd374afc-9df4-435e-90c5-ec2cd3911418","http://resolver.tudelft.nl/uuid:cd374afc-9df4-435e-90c5-ec2cd3911418","Forecasting pedestrian movements using recurrent neural networks: An application of crowd monitoring data","Duives, D.C. (TU Delft Transport and Planning); Wang, Guangxing (University of Queensland); Kim, Jiwon (University of Queensland)","","2019","Currently, effective crowd management based on the information provided by crowd monitoring systems is difficult as this information comes in at the moment adverse crowd movements are already occurring. Up to this moment, very little forecasting techniques have been developed that predict crowd flows a longer time period ahead. Moreover, most contemporary state estimation methods apply demanding pre-processing steps, such as map-matching. The objective of this paper is to design, train and benchmark a data-driven procedure to forecast crowd movements, which can in real-time predict crowd movement. This procedure entails two steps. The first step comprises of a cell sequence derivation method that allows the representation of spatially continuous GPS traces in terms of discrete cell sequences. The second step entails the training of a Recursive Neural Network (RNN) with a Gated Recurrent Unit (GRU) and six benchmark models to forecast the next location of pedestrians. The RNN-GRU is found to outperform the other tested models. Some additional tests of the ability of the RNN-GRU to forecast illustrate that the RNN-GRU preserves its predictive power when a limited amount of data is used from the first few hours of a multi-day event and temporal information is incorporated in the cell sequences.","Deep learning algorithms; Forecasting; GPS trajectories; Pedestrian crowd movements; Recursive Neural Network (RNN) with Gated Recurrent Unit (GRU)","en","journal article","","","","","","","","","","","Transport and Planning","","",""
"uuid:9c959df1-be62-47bc-a389-6eaa434a9288","http://resolver.tudelft.nl/uuid:9c959df1-be62-47bc-a389-6eaa434a9288","Evaluation of feasibility of using the bacteriophage T4 lysozyme to improve the hydrolysis and biochemical methane potential of secondary sludge","Kim, Sangmin (Pohang University of Science and Technology); Woo, Seung Gyun (Korea Research Institute of Bioscience and Biotechnology); Lee, J. (TU Delft Sanitary Engineering); Lee, Dae Hee (Korea Research Institute of Bioscience and Biotechnology); Hwang, Seokhwan (Pohang University of Science and Technology)","","2019","Anaerobic digestion (AD) of secondary sludge is a rate-limiting step due to the bacterial cell wall. In this study, experiments were performed to characterize secondary sludges from three wastewater treatment plants (WWTPs), and to investigate the feasibility of using bacteriophage lysozymes to speed up AD by accelerating the degradation of bacterial cell walls. Protein was the main organic material (67.7% of volatile solids in the sludge). The bacteriophage T4 lysozyme (T4L) was tested for hydrolysis and biochemical methane potential. Variations in the volatile suspended solid (VSS) concentration and biogas production were monitored. The VSS reduction efficiencies by hydrolysis using T4L for 72 h increased and ranged from 17.8% to 26.4%. Biogas production using T4L treated sludges increased and biogas production was increased by as much as 82.4%. Biogas production rate also increased, and the average reaction rate coefficient of first-order kinetics was 0.56 ± 0.02/d, which was up to 47.5% higher compared to the untreated samples at the maximum. Alphaproteobacteria, Betaproteobacteria, Flavobacteriia, Gammaproteobacteria, and Sphingobacteriia were major microbial classes in all sludges. The interpretation of the microbial community structure indicated that T4L treatment is likely to increase the rate of cell wall digestion.","Bacterial community; Biochemical methane potential (BMP); Sludge hydrolysis","en","journal article","","","","","","","","","","","Sanitary Engineering","","",""
"uuid:380c6a8d-9b46-4304-b89a-c211b13b8862","http://resolver.tudelft.nl/uuid:380c6a8d-9b46-4304-b89a-c211b13b8862","3D high frame rate flow measurement using a prototype matrix transducer for carotid imaging","Fool, F. (TU Delft ImPhys/Acoustical Wavefield Imaging); Vos, H.J. (TU Delft ImPhys/Acoustical Wavefield Imaging; Erasmus MC); Shabanimotlagh, M. (TU Delft ImPhys/Acoustical Wavefield Imaging); Soozande, M. (TU Delft ImPhys/Acoustical Wavefield Imaging); Mozaffarzadeh, M. (TU Delft ImPhys/Acoustical Wavefield Imaging); Kim, T. (TU Delft Electronic Instrumentation); Kang, E. (TU Delft Electronic Instrumentation); Pertijs, M.A.P. (TU Delft Electronic Instrumentation); de Jong, N. (TU Delft ImPhys/Acoustical Wavefield Imaging; Erasmus MC); Verweij, M.D. (TU Delft ImPhys/Acoustical Wavefield Imaging; Erasmus MC)","Cochran, Sandy (editor); Lucas, Margaret (editor)","2019","To accurately investigate the state of the carotid artery by the local haemodynamics and motion of the plaque using ultrasound, high-frame rate volumetric imaging is necessary. We have specifically designed a matrix array for this purpose. In this proceeding we will focus on imaging a volumetric flow profile using this matrix. For this purpose, we extend a fast frequency domain vector flow imaging method to 3D and perform measurements on a flow phantom. The results indicate that it is feasible to estimate 3D velocity vectors on a 3D grid using our matrix transducer and the proposed algorithm.","Fourier domain algorithm; Matrix array; Plane wave imaging; Vector velocity imaging; Volumetric flow","en","conference paper","IEEE","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2020-06-09","","","ImPhys/Acoustical Wavefield Imaging","","",""
"uuid:6e8e2aa9-3ba4-4771-b719-ed35dcc51891","http://resolver.tudelft.nl/uuid:6e8e2aa9-3ba4-4771-b719-ed35dcc51891","Light, the universe and everything–12 Herculean tasks for quantum cowboys and black diamond skiers","Agarwal, Girish (Texas A and M University); Allen, Roland E. (Texas A and M University); Bezděková, Iva (Czech Technical University; VŠB - Technical University of Ostrava); Boyd, Robert W. (University of Ottawa; University of Rochester Institute of Optics; University of Glasgow); Chen, Goong (Texas A and M University); Hanson, R. (TU Delft QID/Hanson Lab; TU Delft QN/Hanson Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft); Hawthorne, Dean L. (Cornell University); Hemmer, Philip (Texas A and M University); Kim, Moochan B. (Texas A and M University); Kocharovskaya, Olga (Texas A and M University); Lee, D. (TU Delft Support Urbanism; Texas A and M University; Cornell University); Lidström, Sebastian K. (University of Strathclyde); Lidström, Suzy (Texas A and M University; Royal Swedish Academy of Sciences); Losert, Harald (University of Ulm); Maier, Helmut (University of Ulm); Neuberger, John W. (University of North Texas); Padgett, Miles J. (University of Glasgow); Raizen, Mark (The University of Texas at Austin); Rajendran, Surjeet (University of California); Rasel, Ernst (Institut fuer Quantenoptik and QUEST-LFS); Schleich, Wolfgang P. (Texas A and M University; University of Ulm); Scully, Marlan O. (Texas A and M University); Shchedrin, Gavriil (Texas A and M University); Shvets, Gennady (Cornell University); Sokolov, Alexei (Texas A and M University; Baylor University); Svidzinsky, Anatoly (Texas A and M University); Walsworth, Ronald L. (Harvard University); Weiss, Rainer (Massachusetts Institute of Technology); Wilczek, Frank (Massachusetts Institute of Technology; Shanghai Jiao Tong University; Arizona State University; Stockholm University); Willner, Alan E. (University of Southern California); Yablonovich, Eli (University of California); Zheludev, Nikolay (University of Southampton; Nanyang Technological University)","","2018","The Winter Colloquium on the Physics of Quantum Electronics (PQE) has been a seminal force in quantum optics and related areas since 1971. It is rather mind-boggling to recognize how the concepts presented at these conferences have transformed scientific understanding and human society. In January 2017, the participants of PQE were asked to consider the equally important prospects for the future, and to formulate a set of questions representing some of the greatest aspirations in this broad field. The result is this multi-authored paper, in which many of the world’s leading experts address the following fundamental questions: (1) What is the future of gravitational wave astronomy? (2) Are there new quantum phases of matter away from equilibrium that can be found and exploited–such as the time crystal? (3) Quantum theory in uncharted territory: What can we learn? (4) What are the ultimate limits for laser photon energies? (5) What are the ultimate limits to temporal, spatial and optical resolution? (6) What novel roles will atoms play in technology? (7) What applications lie ahead for nitrogen-vacancy centres in diamond? (8) What is the future of quantum coherence, squeezing and entanglement for enhanced super-resolution and sensing? (9) How can we solve (some of) humanity’s biggest problems through new quantum technologies? (10) What new understanding of materials and biological molecules will result from their dynamical characterization with free-electron lasers? (11) What new technologies and fundamental discoveries might quantum optics achieve by the end of this century? (12) What novel topological structures can be created and employed in quantum optics?.","Bayesian; Bekenstein–Hawking; Bose–Einstein condensate; coherence; equivalence principle; fractal quantum carpets; free-electron laser; gravitational waves; imaging; interferometry; isotope separation; Lamb shift; laser; LIGO; lithography; magnetometer; maser; Maxwell’s demon; metrology; nanostructure; nitrogen-vacancy centres; non-linear; optics; photon; photonics; Quantum; quantum computing; quantum internet; Rayleigh limit; Riemann hypothesis; sensing; solar energy; super-resolution; superradiance; time crystal; topological","en","journal article","","","","","","","","2019-04-24","","","QID/Hanson Lab","","",""
"uuid:9238348f-58fc-4ec5-affc-a04fc57ef98c","http://resolver.tudelft.nl/uuid:9238348f-58fc-4ec5-affc-a04fc57ef98c","Real-time imaging of DNA loop extrusion by condensin","Ganji, M. (TU Delft BN/Cees Dekker Lab); Shaltiel, Indra A. (European Molecular Biology Laboratory Heidelberg); Bisht, Shveta (European Molecular Biology Laboratory Heidelberg); Kim, E. (TU Delft BN/Cees Dekker Lab); Kalichava, A. (TU Delft BN/Cees Dekker Lab); Haering, Christian H. (European Molecular Biology Laboratory Heidelberg); Dekker, C. (TU Delft BN/Cees Dekker Lab)","","2018","It has been hypothesized that SMC protein complexes such as condensin and cohesin spatially organize chromosomes by extruding DNA into large loops. We directly visualized the formation and processive extension of DNA loops by yeast condensin in real time. Our findings constitute unambiguous evidence for loop extrusion. We observed that a single condensin complex is able to extrude tens of kilobase pairs of DNA at a force-dependent speed of up to 1500 base pairs per second, using the energy of adenosine triphosphate hydrolysis. Condensin-induced loop extrusion was strictly asymmetric, which demonstrates that condensin anchors onto DNA and reels it in from only one side. Active DNA loop extrusion by SMC complexes may provide the universal unifying principle for genome organization.","","en","journal article","","","","","","Accepted Author Manuscript","","","","","BN/Cees Dekker Lab","","",""
"uuid:a48bba52-d5d2-4f5d-a84f-cd8884fcc1e4","http://resolver.tudelft.nl/uuid:a48bba52-d5d2-4f5d-a84f-cd8884fcc1e4","Transfer Learning of Artist Group Factors to Musical Genre Classification","Kim, Jaehun (TU Delft Multimedia Computing); Won, Minz (Pompeu Fabra University); Serra, Xavier (Pompeu Fabra University); Liem, C.C.S. (TU Delft Multimedia Computing)","","2018","The automated recognition of music genres from audio information is a challenging problem, as genre labels are subjective and noisy. Artist labels are less subjective and less noisy, while certain artists may relate more strongly to certain genres. At the same time, at prediction time, it is not guaranteed that artist labels are available for a given audio segment. Therefore, in this work, we propose to apply the transfer learning framework, learning artist-related information which will be used at inference time for genre classification. We consider different types of artist-related information, expressed through artist group factors, which will allow for more efficient learning and stronger robustness to potential label noise. Furthermore, we investigate how to achieve the highest validation accuracy on the given FMA dataset, by experimenting with various kinds of transfer methods, including single-task transfer, multi-task transfer and finally multi-task learning.","music information retrieval; multi-task learning; transfer learning; neural network","en","conference paper","International World Wide Web Conferences Steering Committee","","","","","","","","","","Multimedia Computing","","",""
"uuid:0bd07d4e-5c9b-46b4-bb45-2852b20ebe8b","http://resolver.tudelft.nl/uuid:0bd07d4e-5c9b-46b4-bb45-2852b20ebe8b","A 0.53pJK27000μm2resistor-based temperature sensor with an inaccuracy of ±0.35°C (3σ) in 65nm CMOS","Choi, Woojun (Yonsei University); Lee, Yong-Tae (Yonsei University); Kim, Seonhong (SK Hynix); Lee, Sanghoon (SK Hynix); Jang, Jieun (SK Hynix); Chun, Junhyun (SK Hynix); Makinwa, K.A.A. (TU Delft Microelectronics); Chae, Youngcheol (Yonsei University)","Fujino, L.C. (editor)","2018","In microprocessors and DRAMs, on-chip temperature sensors are essential components, ensuring reliability by monitoring thermal gradients and hot spots. Such sensors must be as small as possible, since multiple sensors are required for dense thermal monitoring. However, conventional BJT-based temperature sensors are not compatible with the sub-1V supply of advanced processes. Subthreshold MOSFETs can operate from lower supplies, but at high temperatures their performance is limited by leakage [1,2]. Thermal diffusivity (TD) sensors achieve sub-1V operation and small area with moderate accuracy, but require milliwatts of power [3]. Recently, resistor-based sensors based on RC WienBridge (WB) filters have realized high resolution and energy efficiency [4,5]. Fundamentally, they are robust to process and supply-voltage scaling. However, their readout circuitry has been based on continuous-time (CT) ΔΣ ADCs or frequency-locked loops (FLLs), which require precision analog circuits and occupy considerable area (>0.7mm 2 ).
+ into the enzyme-active 1,4-NADH to promote an alcohol dehydrogenase catalysed stereospecific reduction reaction. The catalytic turnover of all the reaction components was demonstrated. Factors influencing the efficiency of the overall system were identified.","biocatalysis; enantioselectivity; ketones; photochemistry; reduction","en","journal article","","","","","","","","","","BT/Biotechnologie","BT/Biocatalysis","","",""
"uuid:45f23e13-cac1-45af-af86-6f26ffbdfea4","http://resolver.tudelft.nl/uuid:45f23e13-cac1-45af-af86-6f26ffbdfea4","A Compact Resistor-Based CMOS Temperature Sensor With an Inaccuracy of 0.12 °C (3σ) and a Resolution FoM of 0.43 pJ·K² in 65-nm CMOS","Choi, Woojun (Yonsei University); Lee, Yongtae (Yonsei University); Kim, Seonhong (SK Hynix); Lee, Sanghoon (SK Hynix); Jang, Jieun (SK Hynix); Chun, Junhyun (SK Hynix); Makinwa, K.A.A. (TU Delft Microelectronics); Chae, Youngcheol (Yonsei University)","","2018","This paper presents a compact resistor-based CMOS temperature sensor intended for dense thermal monitoring. It is based on an RC poly-phase filter (PPF), whose temperature-dependent phase shift is read out by a frequency-locked loop (FLL). The PPF's phase shift is determined by a zero-crossing (ZC) detector, allowing the rest of the FLL to be realized in an area-efficient manner. Implemented in a 65-nm CMOS technology, the sensor occupies only 7000 μm². It can operate from supply voltages as low as 0.85 V and consumes 68 μW. A sensor based on a PPF made from silicided p-poly resistors and metal-insulator-metal (MIM) capacitors achieves an inaccuracy of ±0.12 °C (3σ) from -40 °C to 85 °C and a resolution of 2.5 mK (rms) in a 1-ms conversion time. This corresponds to a resolution figure-of-merit (FoM) of 0.43 pJ·K².","Area-efficient; CMOS temperature sensor; energy-efficient; frequency-locked loop (FLL); poly-phase filter (PPF); resistor-based sensor; trimming; zero-crossing (ZC) detection","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2022-03-30","","Microelectronics","","","",""
"uuid:4d2add79-e5ef-4fa5-b2d7-98582721908a","http://resolver.tudelft.nl/uuid:4d2add79-e5ef-4fa5-b2d7-98582721908a","Reliability assessment for corroded pipelines in series considering length-scale effects","Mustaffa, Z. (Universiti Teknologi Petronas); van Gelder, P.H.A.J.M. (TU Delft Safety and Security Science); Dawotola, A. W. (Heneco Oil and Gas); Yu, S. Y. (Universiti Teknologi Petronas); Kim, D. K. (Graduate Institute of Ferrous Technology)","","2018","This paper presents a method for assessing the reliability of a corroded pipeline placed in series, with special consideration given to the effect of the length scale imposed by each segment of the pipe. The features of corrosion in different pipe segments are statistically correlated; thus, a failure in one section may impact the adjacent sections. Herein, using a correlation distance parameter, such statistical correlation is described considering the length-scale effects. The reliability of the corroded pipeline is presented in the form of a failure probability. The results show that analysing a corroded pipeline by considering length-scale effects produces a higher failure probability compared with the case where such effects are excluded, even when the parameters that govern corrosion in a pipeline are included in the analysis.","Corrosion; Pipeline; Reliability; Series; System","en","journal article","","","","","","","","","","","Safety and Security Science","","",""
"uuid:240f014a-a6f2-4225-866e-79582f481bca","http://resolver.tudelft.nl/uuid:240f014a-a6f2-4225-866e-79582f481bca","Biocatalytic C=C Bond Reduction through Carbon Nanodot-Sensitized Regeneration of NADH Analogues","Kim, Jinhyun (Korea Advanced Institute of Science and Technology); Lee, S.H. (Korea Advanced Institute of Science and Technology); Tieves, F. (TU Delft BT/Biocatalysis); Choi, Da Som (Korea Advanced Institute of Science and Technology); Hollmann, F. (TU Delft BT/Biocatalysis); Paul, C.E. (Wageningen University & Research); Park, Chan Beum (Korea Advanced Institute of Science and Technology)","","2018","Light-driven activation of redox enzymes is an emerging route for sustainable chemical synthesis. Among redox enzymes, the family of Old Yellow Enzyme (OYE) dependent on the nicotinamide adenine dinucleotide cofactor (NADH) catalyzes the stereoselective reduction of α,β-unsaturated hydrocarbons. Here, we report OYE-catalyzed asymmetric hydrogenation through light-driven regeneration of NADH and its analogues (mNADHs) by N-doped carbon nanodots (N-CDs), a zero-dimensional photocatalyst. Our spectroscopic and photoelectrochemical analyses verified the transfer of photo-induced electrons from N-CDs to an organometallic electron mediator (M) for highly regioselective regeneration of cofactors. Light triggered the reduction of NAD+ and mNAD+s with the cooperation of N-CDs and M, and the reduction behaviors of cofactors were dependent on their own reduction peak potentials. The regenerated cofactors subsequently delivered hydrides to OYE for stereoselective conversions of a broad range of substrates with excellent biocatalytic efficiencies.","alkene hydrogenation; asymmetric catalysis; carbon nanodot; NADH analogues; photobiocatalysis","en","journal article","","","","","","Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.","","2019-01-30","","","BT/Biocatalysis","","",""
"uuid:6844c52e-f388-4110-a385-8bc99b9c7422","http://resolver.tudelft.nl/uuid:6844c52e-f388-4110-a385-8bc99b9c7422","DNA sequence encodes the position of DNA supercoils","Kim, S.H. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Ganji, M. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft; Ludwig Maximilians University; Max Planck Institute of Biochemistry); Kim, E. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); van der Torre, J. (TU Delft BN/Technici en Analisten; Kavli institute of nanoscience Delft); Abbondanzieri, E. (TU Delft BN/Bionanoscience; Kavli institute of nanoscience Delft; University of Rochester); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft)","","2018","The three-dimensional organization of DNA is increasingly understood to play a decisive role in vital cellular processes. Many studies focus on the role of DNA-packaging proteins, crowding, and confinement in arranging chromatin, but structural information might also be directly encoded in bare DNA itself. Here, we visualize plectonemes (extended intertwined DNA structures formed upon supercoiling) on individual DNA molecules. Remarkably, our experiments show that the DNA sequence directly encodes the structure of supercoiled DNA by pinning plectonemes at specific sequences. We develop a physical model that predicts that sequence-dependent intrinsic curvature is the key determinant of pinning strength and demonstrate this simple model provides very good agreement with the data. Analysis of several prokaryotic genomes indicates that plectonemes localize directly upstream of promoters, which we experimentally confirm for selected promotor sequences. Our findings reveal a hidden code in the genome that helps to spatially organize the chromosomal DNA.","C. elegans; chromosome organization; chromosomes; D. melanogaster; DNA structure; DNA Supercoil; E. coli; fluorescence; gene expression; physics of living systems; plectoneme; S. cerevisiae; single molecule","en","journal article","","","","","","","","","","BN/Bionanoscience","BN/Cees Dekker Lab","","",""
"uuid:045fefc9-4da9-4fc4-8a80-1e1c52196530","http://resolver.tudelft.nl/uuid:045fefc9-4da9-4fc4-8a80-1e1c52196530","Characterizing steroid hormone receptor chromatin binding landscapes in male and female breast cancer","Severson, Tesa M. (Netherlands Cancer Institute); Kim, Yongsoo (Netherlands Cancer Institute); Joosten, Stacey E.P. (Netherlands Cancer Institute); Schuurman, Karianne (Netherlands Cancer Institute); Van Der Groep, Petra (University Medical Center Utrecht); Moelans, Cathy B. (University Medical Center Utrecht); Ter Hoeve, Natalie D. (University Medical Center Utrecht); Manson, Quirine F. (University Medical Center Utrecht); Martens, J.W.M. (Erasmus MC; Dutch Breast Cancer Research Group; Cancer Genomics Centre); Wessels, L.F.A. (TU Delft Pattern Recognition and Bioinformatics; Netherlands Cancer Institute; Cancer Genomics Centre)","","2018","Male breast cancer (MBC) is rare and largely hormonally driven. Here, the authors examine the action of steroid hormone receptors in male and female breast cancers and find gender selective hormone receptor action that associates with the survival of MBC patients.","","en","journal article","","","","","","","","","","","Pattern Recognition and Bioinformatics","","",""
"uuid:8638c4fb-4cd5-4f36-971a-237162050178","http://resolver.tudelft.nl/uuid:8638c4fb-4cd5-4f36-971a-237162050178","Integrative epigenetic taxonomy of primary prostate cancer","Stelloo, Suzan (Netherlands Cancer Institute); Nevedomskaya, Ekaterina (Netherlands Cancer Institute); Kim, Yongsoo (Netherlands Cancer Institute); Schuurman, Karianne (Netherlands Cancer Institute); Valle-Encinas, Eider (Netherlands Cancer Institute); Lobo, João (Universidade do Porto); Krijgsman, Oscar (Netherlands Cancer Institute); Peeper, Daniel Simon (Netherlands Cancer Institute); Chang, Seiwon Laura (University of California); Wessels, L.F.A. (TU Delft Pattern Recognition and Bioinformatics; Netherlands Cancer Institute)","","2018","The Androgen Receptor (AR) is the key-driving transcription factor in prostate cancer, tightly controlled by epigenetic regulation. To date, most epigenetic profiling has been performed in cell lines or limited tissue samples. Here, to comprehensively study the epigenetic landscape, we perform RNA-seq with ChIP-seq for AR and histone modification marks (H3K27ac, H3K4me3, H3K27me3) in 100 primary prostate carcinomas. Integrative molecular subtyping of the five data streams revealed three major subtypes of which two were clearly TMPRSS2-ERG dictated. Importantly, we identify a third subtype with low chromatin binding and activity of AR, but with high activity of FGF and WNT signaling. While positive for neuroendocrine-hallmark genes, these tumors were copy number-neutral with low mutational burden, significantly depleted for genes characteristic of poor-outcome associated luminal B-subtype. We present a unique resource on transcriptional and epigenetic control in prostate cancer, revealing tight control of gene regulation differentially dictated by AR over three subtypes.","","en","journal article","","","","","","","","","","","Pattern Recognition and Bioinformatics","","",""
"uuid:eac86bd0-26de-4a64-9599-fcc7e0ace7a2","http://resolver.tudelft.nl/uuid:eac86bd0-26de-4a64-9599-fcc7e0ace7a2","Efficient two-port electron beam splitter via a quantum interaction-free measurement","Yang, Yujia (Massachusetts Institute of Technology); Kim, Chung Soo (Massachusetts Institute of Technology); Hobbs, Richard G. (Massachusetts Institute of Technology); Kruit, P. (TU Delft ImPhys/Charged Particle Optics); Berggren, Karl K. (Massachusetts Institute of Technology)","","2018","Semitransparent mirrors are standard elements in light optics for splitting light beams or creating two versions of the same image. Such mirrors do not exist in electron optics, although they could be beneficial in existing techniques such as electron interferometry and holography and could enable alternative electron imaging and spectroscopy techniques. We propose a design for an electron beam splitter using the concept of quantum interaction-free measurement (IFM). The design combines an electron resonator with a weak phase grating. Fast switching gates allow electrons to enter and exit the resonator. While in the resonator, the phase grating transfers intensity from the direct beam into one of the weakly diffracted beams at each pass. To make the beam splitter an efficient two-port splitter, the intensity in all other diffracted beams is blocked by an aperture. The IFM principle minimizes the loss of total intensity by this aperture. We use a scattering matrix method to analyze the performance of the beam splitter, including the effects of inelastic scattering in the phase grating. This design can be generalized to beam splitters for not only electrons, but also photons, neutrons, atoms, and other quantum mechanical systems.","","en","journal article","","","","","","","","","","","ImPhys/Charged Particle Optics","","",""
"uuid:437fce8a-fd3c-4513-b442-7bd40aeda113","http://resolver.tudelft.nl/uuid:437fce8a-fd3c-4513-b442-7bd40aeda113","RecA filament maintains structural integrity using ATP-driven internal dynamics","Kim, S.H. (TU Delft BN/Cees Dekker Lab; Sogang University; Kavli institute of nanoscience Delft); Ahn, Tak Kyoon (Sogang University); Cui, T.J. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Chauhan, S. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Sung, Jaeyoung (Chung-Ang University); Joo, C. (TU Delft BN/Chirlmin Joo Lab; Kavli institute of nanoscience Delft); Kim, Doseok (Sogang University)","","2017","At the core of homologous DNA repair, RecA catalyzes the strand exchange reaction. This process is initiated by a RecA loading protein, which nucleates clusters of RecA proteins on single-stranded DNA. Each cluster grows to cover the single-stranded DNA but may leave 1- to 2-nucleotide (nt) gaps between the clusters due to three different structural phases of the nucleoprotein filaments. It remains to be revealed how RecA proteins eliminate the gaps to make a seamless kilobase-long filament. We develop a single-molecule fluorescence assay to observe the novel internal dynamics of the RecA filament. We directly observe the structural phases of individual RecA filaments and find that RecA proteins move their positions along the substrate DNA to change the phase of the filament. This reorganization process, which is a prerequisite step for interjoining of two adjacent clusters, requires adenosine triphosphate hydrolysis and is tightly regulated by the recombination hotspot, Chi. Furthermore, RecA proteins recognize and self-align to a 3-nt-period sequence pattern of TGG. This sequence-dependent phase bias may help the RecA filament to maintain structural integrity within the kilobase-long filament for accurate homology search and strand exchange reaction.","","en","journal article","","","","","","","","","","","BN/Cees Dekker Lab","","",""
"uuid:19164e31-0f3e-49d6-b128-3af464f3cfd2","http://resolver.tudelft.nl/uuid:19164e31-0f3e-49d6-b128-3af464f3cfd2","Human centromeric CENP-A chromatin is a homotypic, octameric nucleosome at all cell cycle points","Nechemia-Arbely, Yael (University of California); Fachinetti, Daniele (University of California); Miga, Karen H. (University of California); Sekulic, Nikolina (University of Pennsylvania); Soni, G.V. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Kim, Dong Hyun (University of California); Wong, Adeline K. (University of California); Lee, Ah Young (University of California); Nguyen, Kristen (University of California); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Ren, Bing (University of California); Black, Ben E. (University of Pennsylvania); Cleveland, Don W. (University of California)","","2017","Chromatin assembled with centromere protein A (CENP-A) is the epigenetic mark of centromere identity. Using new reference models, we now identify sites of CENP-A and histone H3.1 binding within the megabase, α-satellite repeat-containing centromeres of 23 human chromosomes. The overwhelming majority (97%) of α-satellite DNA is found to be assembled with histone H3.1-containing nucleosomes with wrapped DNA termini. In both G1 and G2 cell cycle phases, the 2-4% of α-satellite assembled with CENP-A protects DNA lengths centered on 133 bp, consistent with octameric nucleosomes with DNA unwrapping at entry and exit. CENP-A chromatin is shown to contain equimolar amounts of CENP-A and histones H2A, H2B, and H4, with no H3. Solid-state nanopore analyses show it to be nucleosomal in size. Thus, in contrast to models for hemisomes that briefly transition to octameric nucleosomes at specific cell cycle points or heterotypic nucleosomes containing both CENP-A and histone H3, human CENP-A chromatin complexes are octameric nucleosomes with two molecules of CENP-A at all cell cycle phases.","","en","journal article","","","","","","","","2017-08-24","","","BN/Cees Dekker Lab","","",""
"uuid:01db7382-2b78-4e55-9989-80690b490d0a","http://resolver.tudelft.nl/uuid:01db7382-2b78-4e55-9989-80690b490d0a","The supercoiling state of DNA determines the handedness of both H3 and CENP-A nucleosomes","Vlijm, R. (TU Delft OLD Library Operations; German Cancer Research Center); Kim, S.H. (TU Delft BN/Cees Dekker Lab); De Zwart, P. L.; Dalal, Y. (National Cancer Institute); Dekker, C. (TU Delft BN/Cees Dekker Lab)","","2017","Nucleosomes form the unit structure of the genome in eukaryotes, thereby constituting a fundamental tenet of chromatin biology. In canonical nucleosomes, DNA wraps around the histone octamer in a left-handed toroidal ramp. Here, in single-molecule magnetic tweezers studies of chaperone-assisted nucleosome assembly, we show that the handedness of the DNA wrapping around the nucleosome core is intrinsically ambidextrous, and depends on the pre-assembly supercoiling state of the DNA, i.e., it is not uniquely determined by the octameric histone core. Nucleosomes assembled onto negatively supercoiled DNA are found to exhibit a left-handed conformation, whereas assembly onto positively supercoiled DNA results in right-handed nucleosomes. This intrinsic flexibility to adopt both chiralities is observed both for canonical H3 nucleosomes, and for centromere-specific variant CENP-A nucleosomes. These data support recent advances suggesting an intrinsic adaptability of the nucleosome, and provide insights into how nucleosomes might rapidly re-assemble after cellular processes that generate positive supercoiling in vivo.","","en","journal article","","","","","","","","2018-01-09","","","OLD Library Operations","","",""
"uuid:50069547-8999-4115-9f24-cb7bd0bafc42","http://resolver.tudelft.nl/uuid:50069547-8999-4115-9f24-cb7bd0bafc42","Study on added resistance of a ship under parametric roll motion","Lee, Jae-Hoon; Kim, Younghwan","","2017","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:7da622ad-f151-41a4-aa40-dd87cb00ca45","http://resolver.tudelft.nl/uuid:7da622ad-f151-41a4-aa40-dd87cb00ca45","Review Article: Recommended reading list of early publications on atomic layer deposition - Outcome of the ""virtual Project on the History of ALD""","Ahvenniemi, Esko (Aalto University); Akbashev, Andrew R. (Stanford University); Ali, Saima (Aalto University); Bechelany, Mikhael (ENS-PSL Research University & CNRS); Berdova, Maria (University of Twente); Boyadjiev, Stefan (Bulgarian Academy of Sciences); Cameron, David C. (Masaryk University); Chen, R. (TU Delft Railway Engineering; School of Mechanical Science and Engineering; Huazhong University of Science and Technology); Chubarov, Mikhail (Université Grenoble Alpes); Cremers, Veronique (Universiteit Gent); Devi, Anjana (Center for Interface-Dominated High Performance Materials); Drozd, Viktor (Institute of Translational Biomedicine); Elnikova, Liliya (Institute for Theoretical and Experimental Physics); Gottardi, Gloria (Fondazione Bruno Kessler); Grigoras, Kestutis (VTT Technical Research Center of Finland); Hausmann, Dennis M. (Lam Research Corporation); Hwang, Cheol Seong (Seoul National University); Jen, Shih Hui (Globalfoundries); Kallio, Tanja (Aalto University); Kanervo, Jaana (Aalto University; Åbo Akademi University); Khmelnitskiy, Ivan (Saint Petersburg Electrotechnical University LETI); Kim, Do Han (Massachusetts Institute of Technology); Klibanov, Lev (Techinsights); Koshtyal, Yury (Ioffe Institute); Krause, A. Outi I (Aalto University); Kuhs, Jakob (Universiteit Gent); Kärkkänen, Irina (SENTECH Instruments GmbH); Kääriäinen, Marja Leena (NovaldMedical Ltd. Oy); Kääriäinen, Tommi (Viikki Biocenter 1; NovaldMedical Ltd. Oy); Lamagna, Luca (STMicroelectronics); Łapicki, Adam A. (Seagate Technology (Ireland)); Leskelä, Markku (Viikki Biocenter 1); Lipsanen, Harri (Aalto University); Lyytinen, Jussi (Aalto University); Malkov, Anatoly (St. Petersburg State Institute of Technology); Malygin, Anatoly (St. Petersburg State Institute of Technology); Mennad, Abdelkader (CDER); Militzer, Christian (Technische Universität Chemnitz); Molarius, Jyrki (Summa Semiconductor Oy); Norek, Małgorzata (Military University of Technology); Özgit-Akgün, Çaǧla (ASELSAN Inc.); Panov, Mikhail (Saint Petersburg Electrotechnical University LETI); Pedersen, Henrik (Linköping University); Piallat, Fabien (KOBUS); Popov, Georgi (Viikki Biocenter 1); Puurunen, Riikka L. (VTT Technical Research Center of Finland); Rampelberg, Geert (Universiteit Gent); Ras, Robin H A (Aalto University); Rauwel, Erwan (Tallinn University of Technology); Roozeboom, Fred (Eindhoven University of Technology; TNO); Sajavaara, Timo (University of Jyväskylä); Salami, Hossein (University of Maryland); Savin, Hele (Aalto University); Schneider, Nathanaelle (Institut Photovoltaique d'Ile-de-France (IPVF) - Site Antony; Institut de recherche et développement sur l’énergie photovoltaïque (IRDEP-CNRS)); Seidel, Thomas E. (Seitek50); Sundqvist, Jonas (Fraunhofer-Institut für Keramische Technologien und Systeme IKTS); Suyatin, Dmitry B. (Lund University); Törndahl, Tobias (Uppsala University); van Ommen, J.R. (TU Delft ChemE/Product and Process Engineering); Wiemer, Claudia (IMM-CNR); Ylivaara, Oili M E (VTT Technical Research Center of Finland); Yurkevich, Oksana (Immanuel Kant Baltic Federal University)","","2017","Atomic layer deposition (ALD), a gas-phase thin film deposition technique based on repeated, self-terminating gas-solid reactions, has become the method of choice in semiconductor manufacturing and many other technological areas for depositing thin conformal inorganic material layers for various applications. ALD has been discovered and developed independently, at least twice, under different names: atomic layer epitaxy (ALE) and molecular layering. ALE, dating back to 1974 in Finland, has been commonly known as the origin of ALD, while work done since the 1960s in the Soviet Union under the name ""molecular layering"" (and sometimes other names) has remained much less known. The virtual project on the history of ALD (VPHA) is a volunteer-based effort with open participation, set up to make the early days of ALD more transparent. In VPHA, started in July 2013, the target is to list, read and comment on all early ALD academic and patent literature up to 1986. VPHA has resulted in two essays and several presentations at international conferences. This paper, based on a poster presentation at the 16th International Conference on Atomic Layer Deposition in Dublin, Ireland, 2016, presents a recommended reading list of early ALD publications, created collectively by the VPHA participants through voting. The list contains 22 publications from Finland, Japan, Soviet Union, United Kingdom, and United States. Up to now, a balanced overview regarding the early history of ALD has been missing; the current list is an attempt to remedy this deficiency.","","en","review","","","","","","","","","","","Railway Engineering","","",""
"uuid:da4dac77-d6d6-46fa-90ec-1153714c8974","http://resolver.tudelft.nl/uuid:da4dac77-d6d6-46fa-90ec-1153714c8974","Fuzzy Bird Helps Me Calm Down and Connect: Touch with Restraint in an Interactive Object for Children with Autism","Boess, S.U. (TU Delft Applied Ergonomics and Design); Smoorenburg, Astrid (Student TU Delft); Kim, Minsung (Student TU Delft); Rijken, Max (Student TU Delft); Latcham, T.R. (Student TU Delft); Kelder, Sophie (Student TU Delft)","Bruns Alonso, M. (editor); Ozcan, E. (editor)","2017","This paper explores the nascent concept of touch with restraint in the design of an interactive object. The design was developed to support children on the autism spectrum in social interaction and to facilitate a feeling of social connectedness. Throughout a constructive design case, the desired nature and interaction style of this interactive object emerged. An object that is characterized by touch with restraint facilitates adoption as a transitional object and mirrors passively and minimally the actions of a user. The design concept and prototype Fuzzy Bird showed the effectiveness of the concept in a user test. This strong concept contributes to the debate of how we come to live with interactive technologies, by drawing attention to the possibility of self-imposing limits on how much interactive technologies do and being respectful toward the human interactions they help facilitate.","touch with restraint; autism; strong concept; constructive design research","en","conference paper","Intech","","","","","","","","","","Applied Ergonomics and Design","","",""
"uuid:edcda71e-15c0-406d-ae97-d8667e8fe18b","http://resolver.tudelft.nl/uuid:edcda71e-15c0-406d-ae97-d8667e8fe18b","Carbon Nanotube-Graphitic Carbon Nitride Hybrid Films for Flavoenzyme-Catalyzed Photoelectrochemical Cells","Son, Eun Jin (Korea Advanced Institute of Science and Technology); Lee, Sahng Ha (Korea Advanced Institute of Science and Technology); Kuk, Su Keun (Korea Advanced Institute of Science and Technology); Pesic, M. (TU Delft BT/Biocatalysis); Choi, Da Som (Korea Advanced Institute of Science and Technology); Ko, Jong Wan (Korea Advanced Institute of Science and Technology); Kim, Kayoung (Korea Advanced Institute of Science and Technology); Hollmann, F. (TU Delft BT/Biocatalysis); Park, Chan Beum (Korea Advanced Institute of Science and Technology)","","2017","In green plants, solar-powered electrons are transferred through sophistically arranged photosystems and are subsequently channelled into the Calvin cycle to generate chemical energy. Inspired by the natural photosynthetic scheme, a photoelectrochemical cell (PEC) is constructed configured with protonated graphitic carbon nitride (p-g-C3N4) and carbon nanotube hybrid (CNT/p-g-C3N4) film cathode, and FeOOH-deposited bismuth vanadate (FeOOH/BiVO4) photoanode for the production of industrially useful chiral alkanes using an old yellow enzyme homologue from Thermus scotoductus (TsOYE). In the biocatalytic PEC platform, photoexcited electrons provided by the FeOOH/BiVO4 photoanode are transferred to the robust and self-standing CNT/p-g-C3N4 hybrid film that electrocatalytically reduces flavin mononucleotide (FMN) mediator. The p-g-C3N4 promotes a two-electron reduction of FMN coupled with an accelerated electron transfer by the conductive CNT network. The reduced FMN subsequently delivers the electrons to TsOYE for the highly enantioselective conversion of ketoisophorone to (R)-levodione. Under light illumination (>420 nm) and external bias, (R)-levodione is synthesized with the enantiomeric excess value of above 83%, not influenced by the scale of applied bias, simultaneously exhibiting stable and high current efficiency. The results suggest that the biocatalytic PEC made up of economical materials can selectively synthesize high-value organic chemicals using water as an electron donor.","Artificial photosynthesis; Biocatalysis; Carbon nanotubes; Graphitic carbon nitride; Photoelectrochemical cells","en","journal article","","","","","","Accepted Author Manuscript","","2018-12-07","","","BT/Biocatalysis","","",""
"uuid:5b6124e8-b352-4c68-b26f-b85d3d303360","http://resolver.tudelft.nl/uuid:5b6124e8-b352-4c68-b26f-b85d3d303360","Registration of Multi-Level Property Rights in 3D in The Netherlands: Two Cases and Next Steps in Further Implementation","Stoter, J.E. (TU Delft Urban Data Science; Kadaster); Ploeger, H.D. (TU Delft OLD Geo-information and Land Development; Vrije Universiteit Amsterdam); Roes, Ruben (Kadaster); van der Riet, Els (Gemeente Delft); Biljecki, F. (TU Delft Urban Data Science); Ledoux, H. (TU Delft Urban Data Science); Kok, Dirco (Kadaster); Kim, S. (TU Delft Urban Data Science)","","2017","This article reports on the first 3D cadastral registration in The Netherlands, accomplished in March 2016. The solution was sought within the current cadastral, organisational, and technical frameworks to obtain a deeper knowledge on the optimal way of implementing 3D registration, while avoiding discussions between experts from different domains. The article presents the developed methodology to represent legal volumes in an interactive 3D visualisation that can be registered in the land registers. The source data is the 3D Building Information Model (BIM). The methodology is applied to two cases: (1) the case of the railway station in Delft, resulting in the actual 3D registration in 2016; and (2) a building complex in Amsterdam, improving the Delft-case and providing the possibility to describe a general workflow from design data to a legal document. An evaluation provides insights for an improved cadastral registration of multi-level property rights. The main conclusion is that in specific situations, a 3D approach has important advantages for cadastral registration over a 2D approach. Further study is needed to implement the solution in a standardised and uniform way, from registration to querying and updating in the future, and to develop a formal registration process accordingly.","3D cadastral registration; architectural models (BIM); 3D deed; 3D land administration; OA-Fund TU Delft","en","journal article","","","","","","","","","","","Urban Data Science","","",""
"uuid:66e737e6-1b84-46c3-9853-4a37947ab116","http://resolver.tudelft.nl/uuid:66e737e6-1b84-46c3-9853-4a37947ab116","Multiscale dynamics of helicity-dependent all-optical magnetization reversal in ferromagnetic Co/Pt multilayers","Medapalli, R. (University of California); Afanasiev, D. (TU Delft QN/Caviglia Lab; Radboud Universiteit Nijmegen; Kavli institute of nanoscience Delft); Kim, D. (University of California); Quessab, Y. (University of California; Lorraine University); Manna, S. (University of California); Montoya, S. A. (University of California); Kirilyuk, A. (Radboud Universiteit Nijmegen); Rasing, Th (Radboud Universiteit Nijmegen); Kimel, A. V. (Radboud Universiteit Nijmegen; Moscow Technological University,); Fullerton, E. E. (University of California)","","2017","Time-resolved magneto-optical imaging reveals that the dynamics of the helicity-dependent all-optical switching (HD-AOS) of Co/Pt ferromagnetic multilayers occurs on the time scales from nanoseconds to seconds. We find HD-AOS proceeds by two stages. First, for an optimized laser fluence, the ultrashort laser pulse demagnetizes the film to 25% of the initial magnetization. Subsequent laser pulses aids nucleation of small reversed domains. The observed nucleation is stochastic and independent of the helicity of laser light. At the second stage circularly polarized light breaks the degeneracy between the magnetic domains promoting a preferred direction of domain wall motion. One circular polarization results in a collapse of the reversed magnetic domains. The other polarization causes the growth of reversed magnetic domain from the nucleation sites, via deterministic displacement of the domain wall resulting in magnetization reversal. This mechanism is supported by further imaging studies of deterministic laser-induced displacement of the domain walls when excited by circularly polarized optical pulses.","","en","journal article","","","","","","","","","","","QN/Caviglia Lab","","",""
"uuid:80982261-eaac-4e2f-8003-32ed67908211","http://resolver.tudelft.nl/uuid:80982261-eaac-4e2f-8003-32ed67908211","Intercalation-based single-molecule fluorescence assay to study DNA supercoil dynamics","Ganji, M. (TU Delft BN/Elio Abbondanzieri Lab); Kim, S.H. (TU Delft BN/Cees Dekker Lab); van der Torre, J. (TU Delft BN/Technici en Analisten); Abbondanzieri, E. (TU Delft BN/Elio Abbondanzieri Lab); Dekker, C. (TU Delft BN/Cees Dekker Lab)","","2016","DNA supercoiling crucially affects cellular processes such as DNA replication, gene expression, and chromatin organization. However, mechanistic understanding of DNA supercoiling and the related DNA-processing enzymes has remained limited, mainly due to the lack of convenient experimental tools to probe these phenomena. Here, we report a novel high-throughput single-molecule assay for real-time visualization of supercoiled DNA molecules, named ISD (Intercalation-induced Supercoiling of DNA). We use an intercalating dye to induce supercoiling of surface-attached DNA molecules as well as to visualize coiled-loop structures (i.e., plectonemes) formed on DNA. The technique is solely based on epifluorescence microscopy and requires no mechanical manipulation of the DNA molecules. This new assay allows to track positions and sizes of individual plectonemes and characterize their position-dependent dynamics such as nucleation, termination, and diffusion. We describe the ISD technique and demonstrate its potential by establishing that plectonemes are pinned to a local 10-nucleotide long mispaired sequence along a double-stranded DNA molecule.","DNA supercoiling; fluorescence; intercalation; plectoneme; single-molecule","en","journal article","","","","","","Accepted Author Manuscript","","2017-07-13","","","BN/Elio Abbondanzieri Lab","","",""
"uuid:6e97e28f-1411-46a5-9af4-dd8956e25778","http://resolver.tudelft.nl/uuid:6e97e28f-1411-46a5-9af4-dd8956e25778","Potential CO2 savings by increasing truck size: A Korean case study","Kim, N.S.; Wiegmans, B.; Bu, L.","","2016","n this paper, we present a method to estimate CO2 reduction potential by increasing the truck size. Trucks are apparently the most preferred freight transport option for most shippers. Therefore, increasing the truck size may be a realizable and practical strategy, except when logistics companies (truck owners) tailor their truck sizes to customer needs despite their inefficiencies. However, increasing the truck size is not justified in all situations. Some types and sizes of trucks may fit specific distance ranges. The distance range in which a certain type and size of truck shows the highest efficiency can be determined by the break-even distance of the corresponding truck type/size. Using this information on break-even distances, the government can roughly estimate the potential CO2 savings. Based on a case study of only pallet shipping trucks, if a subsidy of a 10% discount of new truck purchase costs is given to 1,000 truck owners for 10 years to foster an increase in the sizes of their trucks, the net amount of CO2 emissions that can be saved by 2020 would be 103,069 t. Even though the quantity is not significant, the government expects that shippers and truck owners will more rationally select truck sizes if the information of the break-even distances is provided to the trucking market.","truck; break-even distance; CO2; logistics freight","en","journal article","Springer","","","","","","","","Civil Engineering and Geosciences","Transport & Planning","","","",""
"uuid:9a6785ea-ed71-4d2b-b009-436699ed302a","http://resolver.tudelft.nl/uuid:9a6785ea-ed71-4d2b-b009-436699ed302a","Intercomparison of methods of coupling between convection and large-scale circulation: 2. Comparison over nonuniform surface conditions","Daleu, C. L. (University of Reading); Plant, R. S. (University of Reading); Woolnough, S. J. (University of Reading); Sessions, S. (New Mexico Tech); Herman, M. J. (New Mexico Tech); Sobel, AH (Columbia University); Wang, S. (Columbia University); Kim, D. (University of Washington); cheng, A (NASA Langley Research Center); Bellon, G. (The University of Auckland); Peyrille, P. (Meteo France); Ferry, F. (Meteo France); Siebesma, A.P. (TU Delft Atmospheric Physics; TU Delft Atmospheric Remote Sensing; Royal Netherlands Meteorological Institute (KNMI)); Ulft, LH (Royal Netherlands Meteorological Institute (KNMI))","","2016","As part of an international intercomparison project, the weak temperature gradient (WTG) and damped gravity wave (DGW) methods are used to parameterize large-scale dynamics in a set of cloud-resolving models (CRMs) and single column models (SCMs). The WTG or DGW method is implemented using a configuration that couples a model to a reference state defined with profiles obtained from the same model in radiative-convective equilibrium. We investigated the sensitivity of each model to changes in SST, given a fixed reference state. We performed a systematic comparison of the WTG and DGW methods in different models, and a systematic comparison of the behavior of those models using the WTG method and the DGW method. The sensitivity to the SST depends on both the large-scale parameterization method and the choice of the cloud model. In general, SCMs display a wider range of behaviors than CRMs. All CRMs using either the WTG or DGW method show an increase of precipitation with SST, while SCMs show sensitivities which are not always monotonic. CRMs using either the WTG or DGW method show a similar relationship between mean precipitation rate and column-relative humidity, while SCMs exhibit a much wider range of behaviors. DGW simulations produce large-scale velocity profiles which are smoother and less top-heavy compared to those produced by the WTG simulations. These large-scale parameterization methods provide a useful tool to identify the impact of parameterization differences on model behavior in the presence of two-way feedback between convection and the large-scale circulation.","large-scale parameterized dynamics; tropical convection","en","journal article","","","","","","","","","","","Atmospheric Physics","","",""
"uuid:e7811f47-2a5c-4ce6-839d-0da7ac6ee892","http://resolver.tudelft.nl/uuid:e7811f47-2a5c-4ce6-839d-0da7ac6ee892","Benchmark study on motions and loads of a 6750-TEU containership","Kim, Yonghwan; Kim, Jung-Hyun","","2016","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:642df361-e825-4aa5-ba80-a2d5babee27d","http://resolver.tudelft.nl/uuid:642df361-e825-4aa5-ba80-a2d5babee27d","Study on added resistance of a tanker in head waves at different drafts","Park, Dong-Min.; Kim, Yonghwan; Seo, Min-Guk; Lee, Jaehoon","","2016","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:4e5c7598-365b-42e3-a7ea-bd5e2f297c44","http://resolver.tudelft.nl/uuid:4e5c7598-365b-42e3-a7ea-bd5e2f297c44","CENP-A and H3 Nucleosomes Display a Similar Stability to Force-Mediated Disassembly","Kim, S.H. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); Vlijm, R. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft); van der Torre, J. (TU Delft BN/Technici en Analisten; Kavli institute of nanoscience Delft); Dalal, Y. (National Cancer Institute); Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft)","","2016","Centromere-specific nucleosomes are a central feature of the kinetochore complex during mitosis, in which microtubules exert pulling and pushing forces upon the centromere. CENP-A nucleosomes have been assumed to be structurally unique, thereby providing resilience under tension relative to their H3 canonical counterparts. Here, we directly test this hypothesis by subjecting CENP-A and H3 octameric nucleosomes, assembled on random or on centromeric DNA sequences, to varying amounts of applied force by using single-molecule magnetic tweezers. We monitor individual disassembly events of CENP-A and H3 nucleosomes. Regardless of the DNA sequence, the force-mediated disassembly experiments for CENP-A and H3 nucleosomes demonstrate similar rupture forces, life time residency and disassembly steps. From these experiments, we conclude that CENP-A does not, by itself, contribute unique structural features to the nucleosome that lead to a significant resistance against force-mediated disruption. The data present insights into the mechanistic basis for how CENP-A nucleosomes might contribute to the structural foundation of the centromere in vivo.","nucleosomes; satellite DNA; histones; centromeres; magnets; repeated sequences; DNA fragment ligation; DNA-binding proteins; OA-Fund TU Delft","en","journal article","","","","","","","","","","","BN/Cees Dekker Lab","","",""
"uuid:54568bf2-b79e-4f33-8ddf-f7a2d5639b09","http://resolver.tudelft.nl/uuid:54568bf2-b79e-4f33-8ddf-f7a2d5639b09","Learning from successes and failures of registration of patent applications based on physical ergonomics","Kim, S.; Lee, W.; Lee, B.; Choi, Y.; Lee, J.; Jung, K.; You, H.","","2015","","patent registration; physical ergonomics; patentability; invention","en","journal article","Ergonomics Society of Korea","","","","","","","","Industrial Design Engineering","Industrial Design","","","",""
"uuid:eda02738-c0d4-4bf6-9b84-a907facb3210","http://resolver.tudelft.nl/uuid:eda02738-c0d4-4bf6-9b84-a907facb3210","3D scan to product design: Methods, techniques, and cases","Lee, W.; Lee, B.; Kim, S.; Jung, H.; Jeon, E.; Choi, T.; You, H.","","2015","3D scanning technology has derived great opportunities for ergonomic product designs. This paper is aimed to introduce various research cases and methods based on 3D scanning have conducted by an ergonomics laboratory in South Korea. Sizing systems and representative 3D models developed on anthropometric measurements and 3D scan images with technical know-how were applied to the design of various products. Head, face, ear, upper limb, and waist parts, and full body in seated were anthropometrically analyzed for the design of headwear (e.g., helmet, goggle, and headphone), oxygen mask, earphone, arm-wear (e.g., watch, armband), hip protector, and vehicle seat, Customized software for the efficient analyses such as measurement of anthropometric dimensions, analysis of sizing systems, extraction of representative models, and virtual fit evaluation between products and the body were developed and applied in the product design process with massive 3D images. Representative models (e.g., torso and head) were printed in 3D for effective usage to the design and evaluation of related products. Advanced methods and techniques such as finite element modeling, morphing, and skin deformation have been applied to 3D scanned images for an advanced design of product shapes in further researches.","3D scanning; anthropometric analysis; ergonomic product design","en","conference paper","Hometrica Consulting","","","","","","","","Industrial Design Engineering","Industrial Design","","","",""
"uuid:3ef0805f-3446-4398-8807-d01dd12fdab0","http://resolver.tudelft.nl/uuid:3ef0805f-3446-4398-8807-d01dd12fdab0","Intercomparison of methods of coupling between convection and large-scale circulation: 1. Comparison over uniform surface conditions","Daleu, C. L. (University of Reading); Plant, R. S. (University of Reading); Woolnough, S. J. (University of Reading); Sessions, S. (New Mexico Tech); Herman, M. J. (New Mexico Tech); Sobel, A. (Columbia University); Wang, S. (Columbia University); Kim, D. (University of Washington); Cheng, A. (NASA Langley Research Center); Bellon, G. (The University of Auckland); Peyrille, P. (Meteo France); Ferry, F. (Meteo France); Siebesma, A.P. (TU Delft Atmospheric Physics; TU Delft Atmospheric Remote Sensing; Royal Netherlands Meteorological Institute (KNMI)); Van Ulft, L. (Royal Netherlands Meteorological Institute (KNMI))","","2015","As part of an international intercomparison project, a set of single-column models (SCMs) and cloud-resolving models (CRMs) are run under the weak-temperature gradient (WTG) method and the damped gravity wave (DGW) method. For each model, the implementation of the WTG or DGW method involves a simulated column which is coupled to a reference state defined with profiles obtained from the same model in radiative-convective equilibrium. The simulated column has the same surface conditions as the reference state and is initialized with profiles from the reference state. We performed systematic comparison of the behavior of different models under a consistent implementation of the WTG method and the DGW method and systematic comparison of the WTG and DGW methods in models with different physics and numerics. CRMs and SCMs produce a variety of behaviors under both WTG and DGW methods. Some of the models reproduce the reference state while others sustain a large-scale circulation which results in either substantially lower or higher precipitation compared to the value of the reference state. CRMs show a fairly linear relationship between precipitation and circulation strength. SCMs display a wider range of behaviors than CRMs. Some SCMs under the WTG method produce zero precipitation. Within an individual SCM, a DGW simulation and a corresponding WTG simulation can produce different signed circulation. When initialized with a dry troposphere, DGW simulations always result in a precipitating equilibrium state. The greatest sensitivities to the initial moisture conditions occur for multiple stable equilibria in some WTG simulations, corresponding to either a dry equilibrium state when initialized as dry or a precipitating equilibrium state when initialized as moist. Multiple equilibria are seen in more WTG simulations for higher SST. In some models, the existence of multiple equilibria is sensitive to some parameters in the WTG calculations.","damped gravity wave; large-scale parameterized dynamics; multiple equilibria; tropical convection; weak-temperature gradient","en","journal article","","","","","","","","","","","Atmospheric Physics","","",""
"uuid:d2a9fda7-16b9-46a7-9e8f-2f5415de3e52","http://resolver.tudelft.nl/uuid:d2a9fda7-16b9-46a7-9e8f-2f5415de3e52","Temperature dependence of atomic vibrations in mono-layer graphene","Allen, C.S.; Liberti, E.; Kim, J.S.; Xu, Q.; Fan, Y.; He, K.; Robertson, A.W.; Zandbergen, H.W.; Warner, J.H.; Kirkland, A.I.","","2015","We have measured the mean square amplitude of both in- and out-of-plane lattice vibrations for mono-layer graphene at temperatures ranging from ?100 K to 1300?K. The amplitude of lattice vibrations was calculated from data extracted from selected area electron diffraction patterns recorded across a known temperature range with over 80 diffraction peaks measured per diffraction pattern. Using an analytical Debye model, we have also determined values for the maximum phonon wavelength that can be supported by a mono-layer graphene crystal and the magnitude of quantum mechanical zero point vibrations. For in-plane phonons, the quantum mechanical zero point contribution dominates the measured atomic displacement at room temperature, whereas for out-of-plane modes, thermally populated phonons must be considered. We find a value for the maximum phonon wavelength sampled that is several orders of magnitudes smaller than the physical crystallite size.","graphene; phonons; electron beams; selected area electron diffraction; vibration testing","en","journal article","American Institute of Physics","","","","","","","","Applied Sciences","QN/Quantum Nanoscience","","","",""
"uuid:9c13bc50-f1f4-4b0b-9912-7b160b3dde5a","http://resolver.tudelft.nl/uuid:9c13bc50-f1f4-4b0b-9912-7b160b3dde5a","TUT7 controls the fate of precursor microRNAs by using three different uridylation mechanisms","Kim, B.; Ha, M.; Loeff, L.; Chang, H.; Simanshu, D.K.; Li, S.; Fareh, M.; Patel, D.J.; Joo, C.; Kim, V.N.","","2015","Terminal uridylyl transferases (TUTs) function as integral regulators of microRNA (miRNA) biogenesis. Using biochemistry, single-molecule, and deep sequencing techniques, we here investigate the mechanism by which human TUT7 (also known as ZCCHC6) recognizes and uridylates precursor miRNAs (pre-miRNAs) in the absence of Lin28. We find that the overhang of a pre-miRNA is the key structural element that is recognized by TUT7 and its paralogues, TUT4 (ZCCHC11) and TUT2 (GLD2/PAPD4). For group II pre-miRNAs, which have a 1-nt 3? overhang, TUT7 restores the canonical end structure (2-nt 3? overhang) through mono-uridylation, thereby promoting miRNA biogenesis. For pre-miRNAs where the 3? end is further recessed into the stem (as in 3? trimmed pre-miRNAs), TUT7 generates an oligo-U tail that leads to degradation. In contrast to Lin28-stimulated oligo-uridylation, which is processive, a distributive mode is employed by TUT7 for both mono- and oligo-uridylation in the absence of Lin28. The overhang length dictates the frequency (but not duration) of the TUT7-RNA interaction, thus explaining how TUT7 differentiates pre-miRNA species with different overhangs. Our study reveals dual roles and mechanisms of uridylation in repair and removal of defective pre-miRNAs.","precursor microRNA; single-molecule fluorescence; TUT4 (ZCCHC11); TUT7 (ZCCHC6); uridylation","en","journal article","Wiley","","","","","","","","Applied Sciences","BN/Bionanoscience","","","",""
"uuid:67b34b4a-4116-4369-a4c4-bc956213a9c3","http://resolver.tudelft.nl/uuid:67b34b4a-4116-4369-a4c4-bc956213a9c3","Distinct mechanisms regulating mechanical force-induced Ca2+ signals at the plasma membrane and the ER in human MSCs","Kim, T.J.; Joo, C.; Seong, J.; Vafabakhsh, R.; Botvinick, E.L.; Berns, M.W.; Palmer, A.E.; Wang, N.; Ha, T.; Jakobsson, E.; Sun, J.; Wang, Y.","","2015","It is unclear that how subcellular organelles respond to external mechanical stimuli. Here, we investigated the molecular mechanisms by which mechanical force regulates Ca2+ signaling at endoplasmic reticulum (ER) in human mesenchymal stem cells. Without extracellular Ca2+, ER Ca2+ release is the source of intracellular Ca2+ oscillations induced by laser-tweezer-traction at the plasma membrane, providing a model to study how mechanical stimuli can be transmitted deep inside the cell body. This ER Ca2+ release upon mechanical stimulation is mediated not only by the mechanical support of cytoskeleton and actomyosin contractility, but also by mechanosensitive Ca2+ permeable channels on the plasma membrane, specifically TRPM7. However, Ca2+ influx at the plasma membrane via mechanosensitive Ca2+ permeable channels is only mediated by the passive cytoskeletal structure but not active actomyosin contractility. Thus, active actomyosin contractility is essential for the response of ER to the external mechanical stimuli, distinct from the mechanical regulation at the plasma membrane.","","en","journal article","eLife Sciences Publications","","","","","","","","Applied Sciences","BN/Bionanoscience","","","",""
"uuid:27b35ac8-8508-4e62-aa30-63ebd5964a09","http://resolver.tudelft.nl/uuid:27b35ac8-8508-4e62-aa30-63ebd5964a09","Dynamic Growth and Shrinkage Govern the pH Dependence of RecA Filament Stability","Kim, S.H.; Park, J.; Joo, C.; Kim, D.; Ha, T.","","2015","RecA proteins form a long stable filament on a single-stranded DNA and catalyze strand exchange reaction. The stability of RecA filament changes dramatically with pH, yet its detailed mechanism is not known. Here, using a single molecule assay, we determined the binding and dissociation rates of RecA monomers at the filament ends at various pH. The pH-induced rate changes were moderate but occurred in opposite directions for binding and dissociation, resulting in a substantial increase in filament stability in lower pH. The highly charged residues in C-terminal domain do not contribute to the pH dependent stability. The stability enhancement of RecA filament in low pH may help the cell to cope with acidic stress by fine-tuning of the binding and dissociation rates without losing the highly dynamic nature of the filament required for strand exchange.","","en","journal article","Public Library of Science","","","","","","","","Applied Sciences","BN/Bionanoscience","","","",""
"uuid:5e76d178-d116-4e3a-9691-78d786ef83f9","http://resolver.tudelft.nl/uuid:5e76d178-d116-4e3a-9691-78d786ef83f9","A numerical and experimental study on the drag of a cavitating underwater vehicle in cavitation tunnel","Choi, Jung-Kyu; Ahn, Byoung-Kwon; Kim, Hyoung-Tae","","2015","","resistance & propulsion","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:b5298f37-eeb3-47f2-b43c-e03c016eae79","http://resolver.tudelft.nl/uuid:b5298f37-eeb3-47f2-b43c-e03c016eae79","Distinct mechanisms regulating mechanical force-induced Ca2+ signals at the plasma membrane and the endoplasmic reticulum in human mesenchymal stem cells","Kim, SH (University of Illinois); Joo, C. (TU Delft BN/Chirlmin Joo Lab); Seong, A (External organisation); Vafabakshsh, A (External organisation); Botvinick, A (External organisation); Berns, A (External organisation); Palmer, TA (External organisation); Wang, Z. (External organisation); Ha, Seungkyu; Jakobsson, ME; Sun, M (External organisation)","","2015","It is unclear that how subcellular organelles respond to external mechanical stimuli. Here, we investigated the molecular mechanisms by which mechanical force regulates Ca2+ signaling at endoplasmic reticulum (ER) in human mesenchymal stem cells. Without extracellular Ca2+, ER Ca2+ release is the source of intracellular Ca2+ oscillations induced by laser-tweezer-traction at the plasma membrane, providing a model to study how mechanical stimuli can be transmitted deep inside the cell body. This ER Ca2+ release upon mechanical stimulation is mediated not only by the mechanical support of cytoskeleton and actomyosin contractility, but also by mechanosensitive Ca2+ permeable channels on the plasma membrane, specifically TRPM7. However, Ca2+ influx at the plasma membrane via mechanosensitive Ca2+ permeable channels is only mediated by the passive cytoskeletal structure but not active actomyosin contractility. Thus, active actomyosin contractility is essential for the response of ER to the external mechanical stimuli, distinct from the mechanical regulation at the plasma membrane.","","en","journal article","","","","","","","","","","","BN/Chirlmin Joo Lab","","",""
"uuid:8feecef1-9d0a-42a2-a305-ccdb902dfceb","http://resolver.tudelft.nl/uuid:8feecef1-9d0a-42a2-a305-ccdb902dfceb","New bearingless generator with buoyant rotor for large direct-drive wind turbines","Bang, D.; Jang, G.W.; Hwang, S.H.; Han, P.W.; Kim, J.W.; Koo, D.H.; Polinder, H.; Ferreira, J.A.","","2014","","bearingless; Buoyant rotor; generator direct-drive; wind turbines","en","conference paper","EWEA","","","","","","","","Electrical Engineering, Mathematics and Computer Science","Electrical Sustainable Energy","","","",""
"uuid:a9b1c2fe-4e25-48da-b009-9927350b457a","http://resolver.tudelft.nl/uuid:a9b1c2fe-4e25-48da-b009-9927350b457a","Quadruple-junction thin-film silicon-based solar cells with high open-circuit voltage","Si, F.T.; Kim, D.; Santbergen, R.; Tan, H.; Van Swaaij, R.A.C.M.M.; Smets, A.H.M.; Isabella, O.; Zeman, M.","","2014","","","en","journal article","American Instutute of Physics","","","","","","","","Electrical Engineering, Mathematics and Computer Science","Electrical Sustainable Energy","","","",""
"uuid:b3affa8f-eb66-4d44-9b38-e2b764ee1d91","http://resolver.tudelft.nl/uuid:b3affa8f-eb66-4d44-9b38-e2b764ee1d91","Moving droplets: The measurement of contact lines","Poelma, C.; Franken, M.J.Z.; Kim, H.; Westerweel, J.","","2014","Contact lines are the locations where a gas, liquid and a solid meet. From everyday experience we know that such contact lines can be mobile, for example in the case of a water droplet sliding over a glass surface. However, the continuum description of the flow towards or away from a contact line implies that the forces diverge as one approaches a moving contact line. This fundamental problem is of relevance to many applications, and in particular to the development and application of immersion lithography, where a liquid droplet is positioned between the lithographic optical head and the substrate that moves under it. This contribution will address experiments dealing with the shape and stability of a moving droplet and experiments that investigate the underlying behaviour of the nanoscale structure of the moving contact line.","contact line dynamics; flow visualization; partially-wetting fluid; Total Internal Reflection Fluorescence; Tomo-PIV; shadowgraphy; micro/nanoscale; precursor film","en","conference paper","The Visualization Society of Japan","","","","","","","","Mechanical, Maritime and Materials Engineering","Process and Energy","","","",""
"uuid:072e0b27-de76-4a83-b7e5-5c0b18a52767","http://resolver.tudelft.nl/uuid:072e0b27-de76-4a83-b7e5-5c0b18a52767","Reduction of propeller cavitation induced hull exciting pressure by a reflected wave from air-bubble layer","Lee, Jeung-Hoon; Park, Hyoung-Gil; Kim, Jin-Hak; Lee, Kyung-Jun; Seo, Jong-Soo","","2014","","resistance & propulsion","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:dbd8aa87-de55-4daa-ade6-ce7b7a30465d","http://resolver.tudelft.nl/uuid:dbd8aa87-de55-4daa-ade6-ce7b7a30465d","Parametric bulbous bow design using the cubic Bezier curve and curve-plane intersection method for the minimization of ship resistance in CFD","Chrismianto, D.; Kim, D-J.","","2014","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:5aacf100-5f6e-4b8c-aafd-14b58b5a7a6f","http://resolver.tudelft.nl/uuid:5aacf100-5f6e-4b8c-aafd-14b58b5a7a6f","Numerical analysis of added resistance on ships in short waves","Seo, Min-Guk; Yang, Kyung-Kyu; Park, Dong-Min; Kim, Yonghwan","","2014","","hydrodynamics; Added; resistance","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:29d8028e-2c93-40c8-a3b9-abe32618aecf","http://resolver.tudelft.nl/uuid:29d8028e-2c93-40c8-a3b9-abe32618aecf","On some solitary and cnoidal wave diffraction solutions of the Gree-Naghdi equations","Ertekin, R.C.; Hayatdavoodi, M.; Kim, J.W.","","2014","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:88c07e96-f9ad-4380-8684-135c841fdbe1","http://resolver.tudelft.nl/uuid:88c07e96-f9ad-4380-8684-135c841fdbe1","Generalized Wagner model of water impact numerical conformal mapping","Khabakhpasheva, T.I.; Kim, Y.; Korobkin, A.A.","","2014","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:2839f895-65b7-43c3-b6b3-83d6af187373","http://resolver.tudelft.nl/uuid:2839f895-65b7-43c3-b6b3-83d6af187373","Economy of Hydrogen Production by Parafoil-Pulled Ships","Kim, J. C. (Korea Aerospace Research Institute); Park, C. (Korea Advanced Institute of Science and Technology)","","2013","","","en","conference paper","","","","","","","","","","","","","",""
"uuid:3ae6e91b-b69e-4746-a8ba-8de7d90563a9","http://resolver.tudelft.nl/uuid:3ae6e91b-b69e-4746-a8ba-8de7d90563a9","Velocity and temperature fields measurement of natural circulation flow inside a pool using PIV and PLIF technique","Kim, S.; Kim, D.E.; Euh, D.J.","","2013","Thermal stratification is encountered in large pool of water increasingly being used as heat sink in new generation of advanced reactors. These large pools at near atmospheric pressure provide a heat sink for heat removal from the reactor or steam generator, and the containment by natural circulation as well as a source of water for core cooling. For examples, the PAFS (passive auxiliary feedwater system) is one of the advanced safety features adopted in the APR+(Advanced Power Reactor Plus), which is intended to completely replace the conventional active auxiliary feedwater system [1, 2]. The PAFS cools down the steam generator secondary side and eventually removes the decay heat from the reactor core by adopting a natural convection mechanism. In a pool, the heat transfer from the PCHX (passive condensation heat exchanger) contributed to increase the pool temperature up to the saturation condition and induce the natural circulation flow of the PCCT (passive condensate cooling tank) pool water [3]. When a heat rod is placed horizontally in a pool of water, the fluid adjacent to the heat rod gets heated up. In the process, its density reduces and by virtue of the buoyancy force, the fluid in this region moves up. After reaching the top free surface, the heated water moves towards the other side wall of the pool along the free surface. Since this heated water is cooling, it goes downward along the wall at the other side wall. Above heater rod, a natural circulation flow is formed. However, there is no flow below heater rod until pool water temperature increases to saturation temperature. In this study, velocity measurement was conducted to reveal a natural circulation flow structure in a small pool using PIV (particle image velocimetry) measurement technique.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:8a8e57cf-883a-48ca-8767-46b2ab88e8a5","http://resolver.tudelft.nl/uuid:8a8e57cf-883a-48ca-8767-46b2ab88e8a5","Tomographic PIV measurement of flow in a complex geometry of nasal cavity","Im, S.; Heo, G.E.; Sung, H.J.; Kim, S.K.","","2013","Flow inside a scaled model of nasal cavity was measured by tomographic PIV. The model was constructed with transparent silicon. A refractive index of working fluid was matched to the model index by mixing glycerol and water. Four cameras and double pulse laser system were used for tomographic PIV. To obtain high SNR, red fluorescence particles and longpass glass filters were used. A complex model shape was estimated by accumulating three-dimensional particle positions obtained by least square based triangulation. Morphological operations such as opening and closing were used to improve the estimation quality. The geometry information was used to distinguish the fluid and solid regions in the tomographic reconstruction procedure. The model estimation and tomographic reconstruction procedures were evaluated by synthetic image test. The synthetic images were generated by placing a computer model (stereolithography file from CT data) to a virtual 3D coordinates and by seeding particles in the flow region randomly. Perspective transformation matrix for synthetic image generation was adopted from the experimental camera matrix. The synthetic image test shows that the reconstruction quality for a complex 3D geometry was improved by a masking technique. Finally, flow velocity field was calculated from 3D cross-correlation of reconstructed voxel intensities.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:f92c9da4-3ecc-4acf-ad8f-994a7b0d76ee","http://resolver.tudelft.nl/uuid:f92c9da4-3ecc-4acf-ad8f-994a7b0d76ee","Dynamic behavior and heat transfer characteristics of impinging droplets onto high temperature plate","Lee, C.H.; Kim, D.Y.; Kim, H.D.; Kim, K.C.","","2013","Dynamic behaviour and heat transfer characteristics of impinging droplets on a hot surface were studied experimentally. De-ionized water droplet was made through a 31G injection needle and the droplet size was 2 mm. A sapphire plate was heated up to 300ºC by a hotplate. A high speed camera was used for visualization, and the frame rate was 4000 fps. Weber number was changed from 0.91 to 117.54 by changing initial height of droplet from 10mm to 210 mm. Hydrophobic characteristics was observed when the temperature of hot surface was over Leidenfrost point. Dynamic behaviour was strongly depended on Weber number and splashing phenomena occurred when the Weber number was higher than 50. Micro-explosion was observed at high Weber number with Leidenfrost condition. From the PIV measurement, it was found that the exploded droplets have considerably high speed compared to the impinging velocity. Maximum heat transfer was coincided with nucleate boiling phase after the droplet impingement.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:1d93100e-4c45-4199-a816-e0419a215ef8","http://resolver.tudelft.nl/uuid:1d93100e-4c45-4199-a816-e0419a215ef8","Evaporation-induced flows in confined droplets of diluted aqueous NaCl solution","Choi, Y.S.; Seo, K.W.; Lee, S.J.; Kim, S.H.; Yun, J.H.","","2013","The flows in a naturally evaporating liquid droplet confined by two flat plates were investigated experimentally. A diluted sodium-chloride (NaCl) aqueous solution was used to form the confined droplets. The evaporation of water at the free surface of the droplet built up a concentration gradient inside the solution, which induced a natural convection flow. Three-dimensional trajectories of tracer particles in the droplet were tracked, and the corresponding velocity fields were obtained by using a digital in-line holographic microscopy technique. Furthermore, this study investigated the effects of the confined droplets aspect ratio and the liquids molar concentration on the evaporation-induced flows in the droplet.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:6b579e83-0164-4fbe-b9cd-20b9995e14c5","http://resolver.tudelft.nl/uuid:6b579e83-0164-4fbe-b9cd-20b9995e14c5","Experimental and numerical investigations on the flow field inside pre-and post-surgery models of posterosuperior septectomy","Heo, G.E.; Seo, A.; Kim, R.E.; Kim, S.W.; Kim, S.K.","","2013","Three physiological functions of nasal breathing (air-conditioning, filtering and smelling) are closely related with airflow characteristics in the human nasal airway. Since fluid mechanical properties are heavily affected by the geometry of flow passage, the changes in anatomical shape of nasal cavity by disorders or surgical treatments alter the nasal resistance and functions of nose. In this article, the PIV measurement and numerical simulation has been conducted on the airflow in the pre- and post-surgery (posterosuperior septectomy by transnasal endoscopic surgery of anterocentral skull base) nasal cavity models. Two patients cases were investigated: one with reduction of Creation of an accurate numerical cavity model from CT data is the key to analyze the flow inside of a complex passage by PIV and CFD. Dense CT (Computed Tomogram) data and careful treatment of model surface under the ENT doctors advice provide more sophisticated cavity models for both PIV experiment and numerical simulation. The velocity fields in nasal cavity measured by PIV were compared with CFD results. We tried to find fluid mechanical properties that were correlated with functions of nose.","PIV, CFD, biomedical flow, nasal cavity, post-surgery model","en","conference paper","","","","","","","","","","","","","",""
"uuid:862dc307-c876-4a69-87ae-2d6b910ec5f2","http://resolver.tudelft.nl/uuid:862dc307-c876-4a69-87ae-2d6b910ec5f2","Simultaneous Measurement of Velocity and Dissolved Oxygen Concentration Field in Microchannel using Oxygen Sensitive Particles","Kim, H.D.; Yi, S.J.; Kim, K.C.","","2013","This paper reports a technique for measuring the velocity and dissolved oxygen (DO) concentration fields simultaneously in a micro-scale water flow using oxygen sensitive particles (OSParticles) and a conventional micro particle image velocimetry (?-PIV) method. The OSParticles were fabricated using a dispersion polymerization method by synthesizing platinum (II) octaethyporphrin (PtOEP) with polystyrene (PS), and used as tracer particles and oxygen sensors. An ultra violet light-emitting diode (UV LED) with a wavelength of 385 nm was used as the excitation light source, and phosphorescence images of OSParticles were captured on a CMOS high speed camera. The interrogation window concept was used to measure the DO concentration in water from the dispersed phosphorescence intensity distribution of OSParticles. The Stern-Volmer equations in the interrogation windows were obtained from in-situ calibration. Water containing OSParticles with DO values of 0% and 100% were injected into a Y-shaped microchannel using a double loading syringe pump. The velocity and DO concentration field over the entire channel area were quantified.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:af7b8411-59e6-48a6-adb8-cbecf0b6d5a8","http://resolver.tudelft.nl/uuid:af7b8411-59e6-48a6-adb8-cbecf0b6d5a8","Opaque flow measurement in the pipe system using echo-PIV and UDV method","Wang, K.; Tu, X.C.; Kim, H.B.","","2013","In this paper, echo-PIV and UDV technique were applied to measure the velocity fields of a pipe flow system. The working fluid is mixture of water and kaolin particle. The flow rate of mixture is 0.15 lpm. The error of peak velocity between echo-PIV and UDV were obtained and compared with the theoretical values. This study indicates the feasibility of echo-PIV and UDV methods for measuring the opaque flow which flow medium is water-kaolin mixture.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:ac2cebe3-1042-4fe0-a886-8c6eac741f97","http://resolver.tudelft.nl/uuid:ac2cebe3-1042-4fe0-a886-8c6eac741f97","Molecular mechanism of sequence-dependent stability of RecA filament","Kim, S.H.; Joo, C.; Ha, T.; Kim, D.","","2013","A is a DNA-dependent ATPase and mediates homologous recombination by first forming a filament on a single-stranded (ss) DNA. RecA binds preferentially to TGG repeat sequence, which resembles the recombination hot spot Chi (5'-GCTGGTGG-3') and is the most frequent pattern (GTG) of the codon usage in Escherichia coli. Because of the highly dynamic nature of RecA filament formation, which consists of filament nucleation, growth and shrinkage, we need experimental approaches that can resolve each of these processes separately to gain detailed insights into the molecular mechanism of sequence preference. By using a single-molecule fluorescence assay, we examined the effect of sequence on individual stages of nucleation, monomer binding and dissociation. We found that RecA does not recognize the Chi sequence as a nucleation site. In contrast, we observed that it is the reduced monomer dissociation that mainly determines the high filament stability on TGG repeats. This sequence dependence of monomer dissociation is well-correlated with that of ATP hydrolysis, suggesting that DNA sequence dictates filament stability through modulation of ATP hydrolysis.","","en","journal article","Oxford University Press","","","","","","","","Applied Sciences","BN/Bionanoscience","","","",""
"uuid:a9188ceb-e1ff-4233-ae9b-58dd5853ab6d","http://resolver.tudelft.nl/uuid:a9188ceb-e1ff-4233-ae9b-58dd5853ab6d","Moving liquid droplets with inertia: Experiment, simulation, and theory","Kim, H.","Westerweel, J. (promotor)","2013","This thesis is a work on a contact line instability at a finite Reynolds number, 0 < Re < O(100). This problem corresponds to an immersion droplet applied in a liquid- immersion lithography machine. We perform extensive works to understand this instability problem by means of experimental, numerical, and theoretical ways. First, in order to measure the 3D internal flow pattern, we perform 3D-3C velocimetry techniques, i.e. tomographic particle image velocimetry and 3D particle tracking velocimetry. Furthermore, we observe droplet shape changes by shadowgraphy. Second, based on these experimental results, we develop a modified three-dimensional lubrication model including inertial effects. In this model, the pressure is described as a combination of dynamic pressure effects and capillary pressure effects. By this extended model, we obtain an analytical solution describing the relationship between opening angles and receding angles. Additionally, we show a self-similar flow pattern near the dewetting contact lines. Last, a simplified numerical model is introduced for a liquid immersion droplet. For the numerical computation, we adopt a flat cylinder and apply a zero flux boundary condition at the gas-liquid interface. The numerical results are compared with measurement results and give a good agreement.","moving contact line; immersion droplet; tomographic particle image velocimetry; 3D particle tracking velocimetry; modified lubrication theory; wetting and dewetting; zero-flux boundary condition model","en","doctoral thesis","Delft University of Technology","","","","","","","","Mechanical, Maritime and Materials Engineering","Process and Energy","","","",""
"uuid:cc878c31-925c-43c0-995c-8804b4da61b3","http://resolver.tudelft.nl/uuid:cc878c31-925c-43c0-995c-8804b4da61b3","Hydrodynamic optimization of pre-swirl stator by CFD and model testing","Kim, K.; Leer-Andersen, M.; Werner, S.; Orych, M.; Choi, Y.","","2013","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ffaba9a5-163e-4969-a105-1703838198f4","http://resolver.tudelft.nl/uuid:ffaba9a5-163e-4969-a105-1703838198f4","A Strategy for Developing the Cadastral System of Cadastral Resurvey: Project based on International Standard (LADM) in South Korea","Kim, Taik-Jin; Lee, Taik-Jin; Lee, Young-Ho","","2013","ISO19152 international standard, led by ISO/TC211 in the meantime, has been published as an international standard at the end of 2012. It does not necessarily mean a simple document published. The FIG having the initiative in international standards-based technology is actively promoting overseas business in developing countries through developing a system based on international standards such as STDM. Developing a standard model based on international standards for Korea environment is no longer an option. In this paper, we analyzed the current cadastral resurvey project. Then we analyzed the proposed model in the field of cadastre up to now in Korea. We presented the future-oriented model of land registration for cadastral resurvey project which embraced both kind of standardized target for “Product” and “Process” perspective. This study was mainly carried out the existing literature research about the presented specific model. Therefore it is needed further development for technical model to verify the validity of the practical application.","Cadaster Standard; Land Administration Domain Model; Cadastral Resurvey Project; Land Registration; Standard Model","en","conference paper","","","","","","","","","","","","","",""
"uuid:9019bffc-4232-46a7-9613-3641cbd5f814","http://resolver.tudelft.nl/uuid:9019bffc-4232-46a7-9613-3641cbd5f814","Numerical and experimental investigation of the resistance performance of an icebreaking cargo vessel in pack ice conditions","Kim, Moon-Chan","","2013","","resistance & propulsion","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:50f4f7d4-7136-42ed-86b5-dd0f3543a368","http://resolver.tudelft.nl/uuid:50f4f7d4-7136-42ed-86b5-dd0f3543a368","Design of high-speed planing hulls for the improvement of resistance and seakeeping performance","Kim, Dong Jin; Kim, S.Y.; You, Y.J.; Rhee, K.P.; Kim, S.H.; Kim, Y.G.","","2013","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:07caa188-6c99-4c79-b04b-9ed41c5d240f","http://resolver.tudelft.nl/uuid:07caa188-6c99-4c79-b04b-9ed41c5d240f","Estimates of long-term combined wave bending and whipping for two alternative hull forms","Kim, Dae-Hyun; Engle, Allen H.; Troesch, Armin W.","","2013","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:61a9e006-a22a-4131-9418-a33cf36304a2","http://resolver.tudelft.nl/uuid:61a9e006-a22a-4131-9418-a33cf36304a2","Theoretical prediction of running attitude of a semi-displacement round bilge vessel at high speed","Kim, Dong Jin; Rhee, Key Pyo; You, Young Jun","","2013","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:d6e6c537-5815-4b12-b864-fdaae6eebe3f","http://resolver.tudelft.nl/uuid:d6e6c537-5815-4b12-b864-fdaae6eebe3f","Internal generation of waveson a arced band","Kim, Gunwoo","","2013","","maritime general","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:72c992e2-7571-4238-b41d-e16102473a1d","http://resolver.tudelft.nl/uuid:72c992e2-7571-4238-b41d-e16102473a1d","Numerical simulation of surface shield effects to waterblast wave","Kim, Cheung Hun","","2013","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:efc7264e-4a2d-4dab-a5a1-dcabb3719bff","http://resolver.tudelft.nl/uuid:efc7264e-4a2d-4dab-a5a1-dcabb3719bff","Phase anomalies in Bessel-Gauss beams","Kim, M.S.; Scharf, T.; Da Costa Assafrao, A.; Rockstuhl, C.; Pereira, S.F.; Urbach, H.P.; Herzig, H.P.","","2012","Bessel-Gauss beams are known as non-diffracting beams. They can be obtained by focusing an annularly shaped collimated laser beam. Here, we report for the first time on the direct measurement of the phase evolution of such beams by relying on longitudinal-differential interferometry. We found that the characteristics of Bessel-Gauss beams cause a continuously increasing phase anomaly in the spatial domain where such beams do not diverge, i.e. there is a larger phase advance of the beam when compared to a referential plane wave. Simulations are in excellent agreement with measurements. We also provide an analytical treatment of the problem that matches both experimental and numerical results and provides an intuitive explanation.","","en","journal article","Optical Society of America","","","","","","","","Applied Sciences","IST/Imaging Science and Technology","","","",""
"uuid:74baee69-3071-405d-a98f-a9d8f894cd63","http://resolver.tudelft.nl/uuid:74baee69-3071-405d-a98f-a9d8f894cd63","Anticipating Soft Problems with Consumer Electronic Products: How do soft problems interact with user characteristics and product properties?","Kim, C.","Van Eijk, D.J. (promotor); Christiaans, H.H.C.M. (promotor)","2012","Over the last decade consumer electronic product industries have been confronted with an increase in consumer complaints. Interestingly about half of the reasons for product return are based on so called ‘soft problems’, consumer complaints that cannot be traced back to technical problems. Probably this phenomenon results from technological changes as well as user diversity. Therefore, this PhD project focused on how soft problems are related to product properties and user characteristics. In the study three types of soft problems were identified, related to sensory, functional, and operational qualities. Based on the categorization, the relationship between types of soft problems, product properties, user characteristics and follow-up (re)actions were investigated. In the studies people expressed a huge amount of complaints about a large variety of electronic products, all of which can be defined as soft problems. Overall, all studies revealed that soft problems are partly related to product properties, user characteristics and follow-up (re)actions. In order to make these findings useful for design practice, two methods were proposed and discussed: an interactive tool and a workshop approach. This study gives an overview of how user characteristics and product properties interact with product use. When these aspects are taken into consideration in the product development process, the seriousness of potential problems can be identified. The data found and the methods developed can contribute to better design that will increase consumer satisfaction.","usability; user experience; user characteristics; product property","en","doctoral thesis","Delft University of Technology","","","","","","","","Industrial Design Engineering","Industrial Design","","","",""
"uuid:e2ad5d67-be1c-46d9-b856-3c8132a012de","http://resolver.tudelft.nl/uuid:e2ad5d67-be1c-46d9-b856-3c8132a012de","Submicron hollow spot generation by solid immersion lens and structured illumination","Kim, M.S.; Assafrao, A.C.; Scharf, T.; Wachters, A.J.H.; Pereira, S.F.; Urbach, H.P.; Brun, M.; Olivier, S.; Nicoletti, S.; Herzig, H.P.","","2012","We report on the experimental and numerical demonstration of immersed submicron-size hollow focused spots, generated by structuring the polarization state of an incident light beam impinging on a micro-size solid immersion lens (?-SIL) made of SiO2. Such structured focal spots are characterized by a doughnut-shaped intensity distribution, whose central dark region is of great interest for optical trapping of nano-size particles, super-resolution microscopy and lithography. In this work, we have used a high-resolution interference microscopy technique to measure the structured immersed focal spots, whose dimensions were found to be significantly reduced due to the immersion effect of the ?-SIL. In particular, a reduction of 37% of the dark central region was verified. The measurements were compared with a rigorous finite element method model for the ?-SIL, revealing excellent agreement between them.","","en","journal article","IOP Publishing","","","","","","","","Applied Sciences","Image Science and Technology","","","",""
"uuid:de45b14f-4146-4410-b6cd-31f14ab3bdd9","http://resolver.tudelft.nl/uuid:de45b14f-4146-4410-b6cd-31f14ab3bdd9","A New Project-Based Curriculum of Design Thinking with Systems Engineering Techniques","Haruyama, S.; Kim, S.K.; Beiter, K.A.; Dijkema, G.P.J.; De Weck, O.L.","","2012","We developed a new education curriculum called ""ALPS"" (Active Learning Project Sequence) at Keio University that emphasizes team project-based learning and design thinking with systems engineering techniques. ALPS is a 6 month course, in which students work as a team and design and propose innovative systems. Students identify requirements, propose solution scenarios, and define competitive products or service systems. The multi-university faculty team consists of members of one Japanese university (Keio University), two US universities (Stanford University and MIT), and one European university (TU Delft). The faculty team members from these universities teach design thinking methods and systems engineering methods along a ""V model"" roadmap. Each year, the university team announces a grand theme. The themes we announced so far were ""Enhancing Senior Life in Japan"" in 2008, ""Creation of Sustainable Community"" in 2009, “Safety and Security” in 2010, and “Symbiosis and Synergy” in 2011. Since 2010, the university team asked companies, government, and nonprofit organizations to propose a project based on the grand theme. Proposer organizations work with Keio University early on to define the project and define project requirements. At the end of the 6 months, the final deliverable is an in-depth analysis and recommendations on the problem, based on the latest insights developed at participating universities. By proposing an ALPS project, proposer organizations can encounter fresh, innovative ideas by the mixed student body of multinational/ cultural/professional backgrounds and experience sophisticated system design methods.","design thinking; voice of customers; voice of society; V-model; active learning; team project-based learning; scenario development; multi-disciplinary teams","en","conference paper","","","","","","","","","Technology, Policy and Management","Infrastructures, Systems and Services","","","",""
"uuid:38e1c950-48d4-4422-90e6-d608197b01b2","http://resolver.tudelft.nl/uuid:38e1c950-48d4-4422-90e6-d608197b01b2","Seismic behaviors of earth-core, concrete-faced-rock-fill, and composite dams","Kim, D.S.; Kim, M.K.; Kim, S.H.; Choo, Y.W.","","2012","The investigation on the seismic behavior of dams becomes crucial but is limited due to lack of experimental or field data. This paper aims to experimentally simulate the seismic behavior of three types of dams; earth-core rock-fill dam (ECRD), concrete-faced rock-fill dam (CFRD), and composite dam which combines concrete dam and CFRD. A series of staged centrifuge tests was performed by applying real earthquake record from 0.05g to 0.5g. The distributions of amplification ratio differed depending on the magnitude of earthquake loading, zoning condition, and dam type. The residual settlements and horizontal displacement at the dam crest were small but shallow surface sliding was dominant. The behavior of composite dam is also compared with the behaviors of CFRD.","dynamic centrifuge test; earth-core rock-fill dam; concrete faced rock-fill dam; composite dam; seismic behavior; earthquake","en","conference paper","","","","","","","","","","","","","",""
"uuid:d9077442-c5a2-4e33-9563-41558159f7a8","http://resolver.tudelft.nl/uuid:d9077442-c5a2-4e33-9563-41558159f7a8","Evidence of the Griffiths phase in multiferroic BiMnO3 and BiFe0.5Mn0.5O3 films","Prokhorov, V.G.; Kaminsky, G.G.; Kim, J.M.; Yoo, Y.J.; Lee, Y.P.; Svetchnikov, V.L.; Levchenko, G.G.; Nikolaenko, Y.M.; Khokhlov, V.A.","","2012","Microstructure and magnetic properties of BiMnO3 and BiFe0.5Mn0.5O3 films, prepared by rf magnetron sputtering on LaAlO3 (001) single-crystalline substrate, are investigated. The selected-area electron diffraction analysis allows us to identify the crystal structure of the BiMnO3 film as orthorhombic, while the BiFe0.5Mn0.5O3 film has a hexagonal lattice symmetry. High-resolution electron microscopy study reveals the presence of strip-domain phase with a periodic spacing of about 3c in both films. Magnetic measurements show that in addition to the basic paramagnetic phase the films exhibit Griffiths phase behavior in a wide temperature range. We argue that the observed weak ferromagnetism is due to the strip-domain layered inclusions, rather than intrinsic physical origin of the films.","bismuth compounds; electron diffraction; electron microscopy; ferromagnetic materials; inclusions; iron compounds; magnetic domains; magnetic thin films; multiferroics; paramagnetic materials","en","journal article","American Institute of Physics","","","","","","","","Applied Sciences","","","","",""
"uuid:ad5f2362-626e-46d7-92e0-079b8fb8b010","http://resolver.tudelft.nl/uuid:ad5f2362-626e-46d7-92e0-079b8fb8b010","Effect of a nanoparticle on the optical properties of a photonic crystal cavity: Theory and experiment","Van der Sar, T.; Hagemeier, J.; Pfaff, W.; Heeres, E.; Thon, S.; Kim, H.; Petroff, P.; Oosterkamp, T.; Bouwmeester, D.; Hanson, R.","","2012","Single quantum emitters can be coupled to photonic crystal (PC) cavities by placing their host nanoparticles into the cavity field. We describe fabrication, characterization, and tuning of gallium-phosphide PC cavities that resonate in the visible, and simulations and measurements of the effect of a nanoparticle on the optical properties of these cavities. Simulations show that introducing a 50 nm (100 nm) sized nanoparticle into S1 and L3-type cavities, with original quality factors of 18·10^3 and 73·10^3, respectively, reduces the quality factor by <10% (?50%). Furthermore, simulations indicate that an emitter embedded in a 50 nm (100 nm) sized nanoparticle can be coupled 3.5 (9) times more effectively to an S1 cavity than to an L3 cavity. We employ a nanopositioning technique to position individual, 50 nm sized nanocrystals into S1 cavities, and find that the quality factors are reduced by a factor of 0.9±0.1 from the original values of order 10^3.","quantum optics; nanophotonics and photonic crystals; photonic crystals","en","journal article","Optical Society of America","","","","","","","","Applied Sciences","QN/Quantum Nanoscience","","","",""
"uuid:9caf891e-c703-485b-94ef-414eb1c921fa","http://resolver.tudelft.nl/uuid:9caf891e-c703-485b-94ef-414eb1c921fa","?' Martensite formation in deep-drawn Mn-based TWIP steel","Van Tol, R.T.; Kim, J.K.; Zhao, L.; Sietsma, J.; De Cooman, B.C.","","2012","To understand the formation of ?'-martensite in high stacking fault energy twinning-induced plasticity steel deformed in the deep drawing mode, the existing phases were investigated using magnetic and transmission electron microscopy (TEM). Small fractions of ?'-martensite were quantitatively determined by magnetization saturation experiments and further observed by TEM. TEM revealed the formation of ?'-martensite at shear band and twin intersections.","","en","journal article","Springer","","","","","","","","Mechanical, Maritime and Materials Engineering","Materials Innovation Institute","","","",""
"uuid:99c3dc04-95c4-4143-aafd-b16ab5825e7c","http://resolver.tudelft.nl/uuid:99c3dc04-95c4-4143-aafd-b16ab5825e7c","Physico Chemical Characteristics of High Performance Polymer Modified by Low and Atmospheric Pressure Plasma1","Bhatnagar, N.; Jha, S.; Bhowmik, S.; Gupta, G.; Moon, J.B.; Kim, C.G.","","2012","In this work, the effect of low pressure plasma and atmospheric-pressure plasma treatment on surface properties and adhesion characteristics of high performance polymer, Polyether Ether Ketone (PEEK) are investigated in terms of Fourier Transform Infrared Spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Atomic Force Microscopy (AFM). The experimental results show that the PEEK surface treated by atmospheric pressure plasma lead to an increase in the polar component of the surface energy, resulting in improving the adhesion characteristics of the PEEK/Epoxy adhesive system. Also, the roughness of the treated surfaces is largely increased as confirmed by AFM observation. These results can be explained by the fact that the atmospheric pressure plasma treatment of PEEK surface yields several oxygen functionalities on hydrophobic surface, which play an important role in increasing the surface polarity, wettability, and the adhesion characteristics of the PEEK/Epoxy adhesive system.","","en","journal article","Springer-Verlag","","","","","","","","Aerospace Engineering","Aerspace Structures and Materials","","","",""
"uuid:77e50fcc-88cd-4e43-b81c-12e96f5487b9","http://resolver.tudelft.nl/uuid:77e50fcc-88cd-4e43-b81c-12e96f5487b9","Challenges in computer applications for ship and floating structure design and analysis","Sharma, R.; Kim, T.W.; Storch, R.L.; Hopman, J.J.; Erikstad, S.O.","Hopman, J.J. (advisor)","2012","","","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Design, Production and Operation","","",""
"uuid:d30f2048-1a29-4c35-936b-dc633659e642","http://resolver.tudelft.nl/uuid:d30f2048-1a29-4c35-936b-dc633659e642","Anatomy of turbulent flow around DARPA SUBOFF body in a turning maneuver using high-fidelity RANS","Kim, S.-E.; Rhee, B.J.; Miller, R.W.","","2012","","hydrodynamics","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","","","",""
"uuid:9bcc0851-5f38-473b-bee2-49ae64081a3b","http://resolver.tudelft.nl/uuid:9bcc0851-5f38-473b-bee2-49ae64081a3b","Hydrodynamic characteristics for flow around wavy wings with different wave lengths","Kim, Mi Jeong","","2012","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:8855a825-130a-4f95-8fd2-42820f9c5fa5","http://resolver.tudelft.nl/uuid:8855a825-130a-4f95-8fd2-42820f9c5fa5","Experimental investigation on stern-boat deployment system and operability for Korean coast guard ship","Chun, Ho Hwan; Kim, M.C.; Lee, I.; Kim, K.; Lee, J.K.; Jung, K.H.","","2012","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:05810b5f-0c0c-477a-871e-0edd4bea8ac2","http://resolver.tudelft.nl/uuid:05810b5f-0c0c-477a-871e-0edd4bea8ac2","A new method for assessing the safety of ships damaged by grounding","Paik, J.K.; Kim, D.K.; Park, D.H.; Kim, M.S.","","2012","","construction","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:cacd94fe-a6f5-424f-b0b6-9c882ec4c735","http://resolver.tudelft.nl/uuid:cacd94fe-a6f5-424f-b0b6-9c882ec4c735","Welding distortion analysis of hull blocks using equivalent load method based on inherent strain","Kim, Yong Tai; Kim, Tae Jun; Park, Tae Yoon; Jang, Chang Doo","","2012","","construction","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:434ea3cd-f0fa-4ab0-a63d-5eb3795e7e39","http://resolver.tudelft.nl/uuid:434ea3cd-f0fa-4ab0-a63d-5eb3795e7e39","Endplate effect on aerodynamic characteristics of three-dimensional wings in close free surface proximity","Jung, Jae Hwan; Kim, M.J.; Yoon, H.S.; Hung, P.A.; Chun, H.H.; Park, D.W.","","2012","","resistance & propulsion","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:e28b3682-cf31-43ba-a796-788714c041a3","http://resolver.tudelft.nl/uuid:e28b3682-cf31-43ba-a796-788714c041a3","Experimental investigation of supercavitating flows","Ahn, Byoung-Kwon; Lee, Tea-Kwon; Kim, Hyoung-Tae; Lee, Chang-Sup","","2012","","resistance & propulsion; Cavitator; cavitation; super-cavitation; cavitation tunnel","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:61d2068e-c3d9-4649-b84a-54238b05ea7c","http://resolver.tudelft.nl/uuid:61d2068e-c3d9-4649-b84a-54238b05ea7c","Effect of bidirectional internal flow on fluid-structure interaction dynamics of conveying marine riser model subject to shear current","Chen, Zheng-Shou; Kim, Wu-Joan","","2012","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:15225c97-0c32-4df7-a992-05dc1075e656","http://resolver.tudelft.nl/uuid:15225c97-0c32-4df7-a992-05dc1075e656","A Review of 3D Cadastre Pilot Project and the Policy of 3D NSDI in the Republic of Korea","Jeong, Dong-Hoon; Kim, Taik-Jin; Nam, Dae-Hyun; Li, Hyo-Sang; Cho, Han-Keon","","2011","Recently, due to rapid urbanization, industrialization and population growth, the structures of cities are changing rapidly; multi-purpose three dimensional facilities above and below surface have been increased. Despite the three dimensional space registration such as building and basement facilities is necessary, it is impossible to represent those right in the 2D Cadastre. We can say that it’s time to introduce 3D cadastral system for registration of land in the 3D space. The government of Seoul Metropolitan City pushed ahead a 3D cadastre pilot project from 2009. Also the Korean Government has a policy of development of a 3D National Spatial Data Infrastructure (NSDI) as an innovation to the spatial information industry to establish a base for future growth. In this paper, the result of the pilot project is reviewed. We expect that identified problems can be solved, and the 3D cadastre can be settled in the near future successfully.","3D Prototype; 3D Cadastral Survey; Registration; Land Management; 3D Cadastral Data Model","en","conference paper","","","","","","","","","","","","","",""
"uuid:351b0778-734b-42e3-8efb-4b28c1bef4c9","http://resolver.tudelft.nl/uuid:351b0778-734b-42e3-8efb-4b28c1bef4c9","Interplay between real and pseudomagnetic field in graphene with strain","Kim, K.J.; Blanter, Y.M.; Ahn, K.H.","","2011","We investigate electric and magnetic properties of graphene with rotationally symmetric strain. The strain generates a large pseudomagnetic field with alternating sign in space, which forms a strongly confined quantum dot connected to six chiral channels. The orbital magnetism, degeneracy, and channel opening can be understood from the interplay between the real and pseudomagnetic fields which have different parities under time reversal and mirror reflection. While the orbital magnetic response of the confined state is diamagnetic, it can be paramagnetic if there is an accidental degeneracy with opposite mirror reflection parity.","","en","journal article","American Physical Society","","","","","","","","Applied Sciences","QN/Quantum Nanoscience","","","",""
"uuid:f509193b-ee8b-44f7-93b1-a8ceaae15bd0","http://resolver.tudelft.nl/uuid:f509193b-ee8b-44f7-93b1-a8ceaae15bd0","Self-healing in ECC stimulated by SAP under flexural cyclic load (abstract)","Kim, J.S.; Schlangen, H.E.J.G.","","2011","","self-healing; ECC; SAP; cyclic load","en","conference paper","","","","","","","","","Civil Engineering and Geosciences","Structural Engineering","","","",""
"uuid:8ee72d22-63c4-409d-a1a7-8cedde1adb4a","http://resolver.tudelft.nl/uuid:8ee72d22-63c4-409d-a1a7-8cedde1adb4a","Deterministic nanoassembly of a coupled quantum emitter–photonic crystal cavity system","Van der Sar, T.; Hagemeier, J.; Pfaff, W.; Heeres, E.C.; Thon, S.M.; Kim, H.; Petroff, P.M.; Oosterkamp, T.H.; Bouwmeester, D.; Hanson, R.","","2011","Controlling the interaction of a single quantum emitter with its environment is a key challenge in quantum optics. Here, we demonstrate deterministic coupling of single nitrogen-vacancy (NV) centers to high-quality photonic crystal cavities. We preselect single NV centers and position their 50-nm-sized host nanocrystals into the mode maximum of photonic crystal S1 cavities with few-nanometer accuracy. The coupling results in a strong enhancement of NV center emission at the cavity wavelength.","diamond; nanofabrication; nanostructured materials; photonic crystals; quantum optics; self-assembly; vacancies (crystal); voids (solid)","en","journal article","American Institute of Physics","","","","","","","","Applied Sciences","QN/Quantum Nanoscience","","","",""
"uuid:d35ed474-1ca4-4650-943e-dfa9226d7dc7","http://resolver.tudelft.nl/uuid:d35ed474-1ca4-4650-943e-dfa9226d7dc7","Origin of an enhanced colossal magnetoresistance effect in epitaxial Nd0.52Sr0.48MnO3 thin films","Prokhorov, V.G.; Kaminsky, G.G.; Kim, J.M.; Eom, T.W.; Park, J.S.; Lee, Y.P.; Svetchnikov, V.L.; Levtchenko, G.G.; Nikolaenko, Y.M.; Khokhlov, V.A.","","2011","Nd0.52Sr0.48MnO3 films of various thicknesses have been prepared by dc magnetron sputtering on single crystal LaAlO3 (001) substrates. Reducing the film thickness leads to a significant suppression of ferromagnetic (FM) ordering and the Curie point falls below the antiferromagnetic (AFM) transition temperature. When this occurs, a huge rise of the magnetoresistance ratio from 400 to 60?000% is observed in an applied magnetic field of 5 T. We surmise that this new kind of the enhanced colossal magnetoresistance effect originates in the FM/AFM competition and the collapse of the charge-ordered state at high magnetic fields, rather than in the regular double-exchange mechanism.","charge-ordered states; colossal magnetoresistance; Curie temperature; magnetic epitaxial layers; metal-insulator transition; neodymium compounds; sputter deposition; strontium compounds","en","journal article","American Institute of Physics","","","","","","","","Applied Sciences","","","","",""
"uuid:c8d3777f-552b-4e2b-bc45-1966f766fd63","http://resolver.tudelft.nl/uuid:c8d3777f-552b-4e2b-bc45-1966f766fd63","Evidence of non-Dzyaloshinskii–Moriya ferromagnetism in epitaxial BiFeO3 films","Prokhorov, V.G.; Kaminsky, G.G.; Kim, J.M.; Eom, T.W.; Park, J.S.; Lee, Y.P.; Svetchnikov, V.L.; Levtchenko, G.G.; Nikolaenko, Y.M.; Khokhlov, V.A.","","2011","X-ray diffraction analysis and high-resolution electron microscopy of BiFeO3 films prepared by dc magnetron sputtering on single-crystal LaAlO3 (001) substrates reveal that the films have a highly c-oriented orthorhombic crystalline structure. The magnetic properties of the BiFeO3 films are typical of ensembles of interacting superparamagnetic clusters, rather than Dzyaloshinskii-Moriya weak ferromagnets. The appearance of extrinsic nanoscale superparamagnetic clusters is explained by an oxygen deficiency in certain regions of the film, where ferromagnetic ordering can be realized through a double-exchange Zener mechanism.","bismuth compounds; crystal structure; ferromagnetic materials; magnetic epitaxial layers; sputter deposition; superparamagnetism; X-ray diffraction; Zener effect","en","journal article","American Institute of Physics","","","","","","","","Applied Sciences","","","","",""
"uuid:fa8b0feb-45b4-4735-9050-677756ce0eb4","http://resolver.tudelft.nl/uuid:fa8b0feb-45b4-4735-9050-677756ce0eb4","Two-dimensional growth, anisotropic polaron transport, and magnetic phase segregation in epitaxial Nd0.52Sr0.48MnO3 films","Prokhorov, V.G.; Kaminsky, G.G.; Kim, J.M.; Eom, T.W.; Park, J.S.; Lee, Y.P.; Svetchnikov, V.L.; Levtchenko, G.G.; Paschenko, A.V.; Medvedev, Y.V.; Nikolaenko, Y.M.; Bukin, G.V.; Khokhlov, V.A.","","2011","Nd0.52Sr0.48MnO3 films have been fabricated by dc magnetron sputtering on single-crystal LaAlO3 (001) and SrTiO3 (011) substrates with additional annealing to relax the lattice strain. Although the Nd0.52Sr0.48MnO3 films were deposited simultaneously on different substrates at the same deposition rate, they differ in thickness by a factor of ? . The observed difference in thickness is explained by the two-dimensional (layer-by-layer) film growth, rather than by a difference in growth rate controlled by the crystalline orientation of the substrate. An analysis of optical and transport properties reveals that the observed anisotropy in the polaron motion is governed by a strong anisotropy in the trapping energy, rather than in polaron formation. It is shown that the deposited Nd0.52Sr0.48MnO3 films exhibit magnetic behavior typical of two-phase magnetic systems and should be regarded as an assembly of interacting magnetic clusters.","annealing; galvanomagnetic effects; magnetic anisotropy; magnetic epitaxial layers; magnetic polarons; magnetic transitions; neodymium compounds; sputter deposition; strontium compounds","en","journal article","American Institute of Physics","","","","","","","","Applied Sciences","","","","",""
"uuid:aedf191b-4499-45db-9b40-dad5667af4c8","http://resolver.tudelft.nl/uuid:aedf191b-4499-45db-9b40-dad5667af4c8","Life-cycle ship reliability assessment, damage detection, and optimization","Frangopol, D.M.; Bocchini, P.; Deco, A.; Kim, S.; Kwon, K.; Okasha, N.M.; Saydam, D.; Salvino, L.W.","","2011","","hydrodynamics","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","","","",""
"uuid:d0029852-7162-454a-8153-02ef7ba01220","http://resolver.tudelft.nl/uuid:d0029852-7162-454a-8153-02ef7ba01220","Scattering of obliquely incident water waves by partially reflecting non-transmitting breakwaters","Kim, H.","","2011","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:5207731d-a116-4cc5-b4c2-b5485ff26e6f","http://resolver.tudelft.nl/uuid:5207731d-a116-4cc5-b4c2-b5485ff26e6f","Estimation of extreme slamming pressures using the non-uniform Fourier phase distributions of a design loads generator","Alford, L.K.; Kim, Dae-Hyun; Troesch, Armin W.","","2011","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ea718350-b9ca-4df0-a39f-13db34b13e1c","http://resolver.tudelft.nl/uuid:ea718350-b9ca-4df0-a39f-13db34b13e1c","Comparison of potential and viscous methods for the nonlinear ship wave problem","Kim, Jin","","2011","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:568fe96c-0473-4424-883f-ca998ffa29f3","http://resolver.tudelft.nl/uuid:568fe96c-0473-4424-883f-ca998ffa29f3","CFD as a seakeeping tool for ship design","Kim, Sungeun","","2011","","construction","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:f2c3eb68-054d-459b-9160-023a2d4b546d","http://resolver.tudelft.nl/uuid:f2c3eb68-054d-459b-9160-023a2d4b546d","Time-domain analysis of nonlinear motion responses and structural loads on ships and offshore structures: development of WISH programs","Kim, Yong-Hwan","","2011","","offshore","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:678d2905-4384-40d6-86e9-e270a526ed5f","http://resolver.tudelft.nl/uuid:678d2905-4384-40d6-86e9-e270a526ed5f","Hydrodynamic optimization of multihull ships","Kim, Hyunyul; Yang, Chi","","2011","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:cf33c931-f364-4bf5-aea9-80e597487b07","http://resolver.tudelft.nl/uuid:cf33c931-f364-4bf5-aea9-80e597487b07","Heat flow analysis of an FPSO topside model with wind effect taken into account: A wind-tunnel test and CFD simulation","Kim, Bong Ju","","2011","","construction","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:4a6672f8-1862-4e5a-a342-a4eb9835f173","http://resolver.tudelft.nl/uuid:4a6672f8-1862-4e5a-a342-a4eb9835f173","Nonlinear effect on wave loads of large ships in time domain","Kim, Mun-Sung","","2011","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:fdf54cf8-23ec-4a5c-9b81-81ea50a0d71f","http://resolver.tudelft.nl/uuid:fdf54cf8-23ec-4a5c-9b81-81ea50a0d71f","Effects of ship motion on ship manoeuvering in waves","Seo, Min-Guk; Kim, Yonghwan","","2011","","hydrodynamics","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:bae4772b-924f-4589-a99f-3a0385881674","http://resolver.tudelft.nl/uuid:bae4772b-924f-4589-a99f-3a0385881674","Numerical study on added resistance of ships by using a time-domain Rankine panel method","Kim, K.H.","","2011","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:490f186d-5771-474c-abcb-439997402061","http://resolver.tudelft.nl/uuid:490f186d-5771-474c-abcb-439997402061","Study on icebreaking performance of the Korea icebreaker ARAON in the arctic sea","Kim, Hyun-Soo","","2011","","construction","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:77be1cd5-4e7d-46c9-a3be-2e9ea0364c85","http://resolver.tudelft.nl/uuid:77be1cd5-4e7d-46c9-a3be-2e9ea0364c85","On the internal generation of waves: Control volume approach","Kim, Gunwoo","","2011","","maritime general","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:242c0e6c-0b78-4bbd-8241-4e8d4c43104e","http://resolver.tudelft.nl/uuid:242c0e6c-0b78-4bbd-8241-4e8d4c43104e","Heat flow analysis of an FPSO topside model with wind effect taken into account: A wind-tunnel test and CFD simulation","Kim, B.J.","","2011","","resistance & propulsion","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:e6073853-a6c4-4ce3-8362-0f914ecf1692","http://resolver.tudelft.nl/uuid:e6073853-a6c4-4ce3-8362-0f914ecf1692","Multi-level approach for parametric roll analysis","Kim, Taeyoung","","2011","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:28044a65-5168-45af-a67d-7e294eec57c8","http://resolver.tudelft.nl/uuid:28044a65-5168-45af-a67d-7e294eec57c8","Numerical study on added resistance of ships by using a time-domain Rankine panel method","Kim, K.-H.","","2011","","publications","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:5855740b-cd4b-4156-b5b1-b436c3026f0a","http://resolver.tudelft.nl/uuid:5855740b-cd4b-4156-b5b1-b436c3026f0a","Intermodal Freight Transport on the Right Track?: Environmental and economic performances and their trade-off","Kim, N.S.","Van Wee, B. (promotor)","2010","This dissertation aims to evaluate environmental and economic performances of an intermodal freight transport system and to estimate the trade-off between CO2 emissions, wich is epresented as an indicator of environmental performance, and freight costs, which ndicate the economic performance of the intermodal freight system. The truck-only system is always regarded as the counterpart of the intermodal freight system in this dissertation. To examine the environmental performance of the intermodal freight system, CO2 emissions generated from all the processes in the intermodal chain, such as pre- and post-haulage, long distance haulage, and transshipment, are estimated considering different sources that generate electricity and transmission loss of electricity (Chapters 3 and 4). To examine the economic performance of the system, two approaches are considered: (1) finding the intermodal breakeven distance for which the intermodal system is more competitive than the truck-only system (Chapter 5); (2) examining the economies of scale in the intermodal network and finding the route/system choice that minimizes the total freight transportation costs (Chapter 6). Finally, this dissertation attempts to find the trade-off between CO2 emissions (representing the environmental performance) and freight transportation cost (representing the economic performance) (Chapter 7).","intermodal; logistics; CO2; trade-off; freight","en","doctoral thesis","Trail Research School","","","","","","","2011-01-26","OTB Research Institute for the Built Environment","Transport and infrastructure","","","",""
"uuid:66a6f820-be4d-44d9-90c9-427ef42d652a","http://resolver.tudelft.nl/uuid:66a6f820-be4d-44d9-90c9-427ef42d652a","Effect of fabrication processes on mechanical properties of glass fiber reinforced polymer composites for 49 meter (160 foot) recreational yachts","Kim, Dae-Wook","","2010","","construction","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:3b0825a7-98b2-4c5c-a011-4788fb6a3b6c","http://resolver.tudelft.nl/uuid:3b0825a7-98b2-4c5c-a011-4788fb6a3b6c","Nonlinear effect on wave loads of large ships in time domain","Kim, M.S.","","2010","","proceedings","","book","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:9d197807-ddb7-4539-ba93-54ec89f119f6","http://resolver.tudelft.nl/uuid:9d197807-ddb7-4539-ba93-54ec89f119f6","Application of plastic analysis method tos hip grillage design","Kim, K-Sung","","2010","","publications","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:afbc75ab-cf5a-4fa4-b1fb-a2a7c284d752","http://resolver.tudelft.nl/uuid:afbc75ab-cf5a-4fa4-b1fb-a2a7c284d752","Application of plastic analysis method tos hip grillage design","Kim, K-Sung","","2010","","publications","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:6cc53beb-31fb-4327-8a44-f0e5d4d43b12","http://resolver.tudelft.nl/uuid:6cc53beb-31fb-4327-8a44-f0e5d4d43b12","Fatigue strength assessment of MARK-III type LNG cargo containment system","Kim, M.H.","","2010","","construction","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:b67f5a53-a609-4a3a-8a6b-2d5b6c5f13c4","http://resolver.tudelft.nl/uuid:b67f5a53-a609-4a3a-8a6b-2d5b6c5f13c4","Load characteristics of steel and concrete tubular members under jet fire: An experimental and numerical study","Kim, Bong Ju","","2010","","construction","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:60e5b19e-6f0d-4f89-903f-de5e0c966cfc","http://resolver.tudelft.nl/uuid:60e5b19e-6f0d-4f89-903f-de5e0c966cfc","Hydro- and aerodynamic analysis for the design of a sailing yacht","Kim, Wu-Joan","","2010","","yachting","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:f974d20d-d59e-42f3-b395-62949b786135","http://resolver.tudelft.nl/uuid:f974d20d-d59e-42f3-b395-62949b786135","Experimental and numerical studies on super-cavitating flow of axisymmetric cavitators","Ahn, Byoung-Kwon; Lee, Chang-Sup; Kim, Hyoung-Tae","","2010","","resistance & propulsion; Super-cavitating","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:4ceb9725-618b-4a2a-beaa-9b465cd89846","http://resolver.tudelft.nl/uuid:4ceb9725-618b-4a2a-beaa-9b465cd89846","Time-domain analysis of nonlinear motion responses and structural loads on ships and offeshore structures: development of WISH programs","Kim, Yooil","","2010","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:cc21b6b3-335c-49d5-8ee4-55b746ae426a","http://resolver.tudelft.nl/uuid:cc21b6b3-335c-49d5-8ee4-55b746ae426a","Comparative study on the performance of Pod type waterjet experiment and computation","Kim, Moon-Chan","","2010","","resistance & propulsion","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ee8758b9-78f9-438b-bb52-dbdc01427351","http://resolver.tudelft.nl/uuid:ee8758b9-78f9-438b-bb52-dbdc01427351","CFD as aseakeeping tool for ship design","Kim, Sungeun","","2010","","construction","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:837a2581-1ea6-4419-9e27-ede9f325f7a4","http://resolver.tudelft.nl/uuid:837a2581-1ea6-4419-9e27-ede9f325f7a4","Trade-off between carbon dioxide emissions and logistics costs based on multiobjective optimization","Kim, N.S.; Janic, M.; Van Wee, G.P.","","2009","This paper examines the relationship between the freight transport costs and the carbon dioxide (CO2) emissions in given intermodal and truckonly freight networks. When the trade-off, which is represented as the relationship, is changed, the freight mode share and route choice are also modified. To show the ever changing trade-off and mode and route choice, a decision-support tool was developed. The given intermodal freight networks represent different freight combinations (i.e., a truckonly system, a rail-based intermodal system, and a short sea-based intermodal system). Because CO2 constraints in logistics markets will need to be realized in the near future, a modal shift in freight transportation could be expected to reduce the CO2 emissions within the reasonable cost and time constraints. The technique of multiobjective optimization is used as the core of the decision-support tool for clarifying the relationship. The tool that was developed is applied to a simplified freight transport network connecting two large European ports: the Port of Rotterdam (the Netherlands) and the Port of Gdansk (Poland). The initial solution, based on the minimization of freight costs, shows that the mode share of freight is local and regional freight transportation situations, whereas the other solutions balanced with CO2 emissions show that the mode share is changed into an intermodal freight system, which is based on a hub-and-spoke network. In considering the changing demands and capacities of freight systems, five scenarios are tested to examine the impact of mode and route change on the trade-off. The results of scenario analyses show that the trade-off is significantly influenced by the demands and capacities of systems.","","en","journal article","National Academy of Sciences","","","","","","","","OTB Research Institute","Transport and Infrastructure","","","",""
"uuid:c0fabd5c-1dba-4781-b5b8-1d3e4a88b236","http://resolver.tudelft.nl/uuid:c0fabd5c-1dba-4781-b5b8-1d3e4a88b236","Overview of Dutch bicycle policy","Kim, N.S.","","2009","","","","journal article","","","","","","","","","OTB Research Institute","Transport and Infrastructure","","","",""
"uuid:28ee7590-b651-48b1-b3b6-3e8f90605c83","http://resolver.tudelft.nl/uuid:28ee7590-b651-48b1-b3b6-3e8f90605c83","The trade-off between CO2 emissions and logistics costs based on multi-objective optimization","Kim, N.S.; Janic, M.; Van Wee, G.P.","","2009","This paper develops a decision-support tool for estimating the balanced market shares of given freight transport systems operating in a given network, satisfying both the minimum costs and the Carbon-Dioxide (CO2) emission requirements. Since CO2 constraints in logistics markets need to be realized in the near future, a modal shift in freight transport could be expected to reduce the CO2 emissions within the reasonable cost/time constraints. In order to clarify the relationship between freight costs and CO2 emissions, the technique of multi-objective optimization is used as the core of the decision-support tool. This tool enables the optimal modal market share to be found as well as the optimal trade-off between the costs and the CO2 emissions. The developed tool is applied to a simplified freight transport network connecting two large European ports – the port of Rotterdam (The Netherlands) and the port of Gdansk (Poland). The initial solution, based on the minimization of freight costs, shows that the mode share of freight is local/regional freight transport situations, while the other solutions balanced with CO2 emissions shows that the mode share is changed into intermodal freight system, which is based on the ‘Hub-and-Spoke’ network.","multi-objective optimization; multimodal freight transport; decision-support tool; Carbon-Dioxide (CO2) emissions; modal market share","en","conference paper","","","","","","","","","OTB Research Institute","Transport and Infrastructure","","","",""
"uuid:a2c564d4-9806-4261-8f0f-61ceded8a5b2","http://resolver.tudelft.nl/uuid:a2c564d4-9806-4261-8f0f-61ceded8a5b2","Policy on freight transport in Europe","Kim, N.S.","","2009","","","","journal article","","","","","","","","","OTB Research Institute","Transport and Infrastructure","","","",""
"uuid:65cee8e5-c65c-461d-964f-3e1932f7319d","http://resolver.tudelft.nl/uuid:65cee8e5-c65c-461d-964f-3e1932f7319d","The Role of Coherency Strains on Phase Stability in LixFePO4: Needle Crystallites Minimize Coherency Strain and Overpotential","Van der Ven, A.; Garikipati, K.; Kim, S.; Wagemaker, M.","","2009","We investigate the role of coherency strains on the thermodynamics of two-phase coexistence during Li (de)intercalation of LixFePO4. We explicitly account for the anisotropy of the elastic moduli and analytically derive coupled chemical and mechanical equilibrium criteria for two-phase morphologies observed experimentally. Coherent two-phase equilibrium leads to a variable voltage profile of individual crystallites within the two-phase region as the dimensions of the crystallite parallel to the interface depend on the phase fractions of the coexisting phases. With a model free energy for LixFePO4, we illustrate the effect of coherency strains on the compositions of the coexisting phases and on the voltage profile. We also show how coherency strains can stabilize intermediate solid solutions at low temperatures if phase separation is restricted to Li diffusion along the b-axis of olivine LixFePO4. A finite element analysis shows that long needlelike crystallites with the long axis parallel to the a lattice vector of LixFePO4 minimize coherency strain energy. Hence, needlelike crystallites of LiFePO4 reduce the overpotential needed for Li insertion and removal and minimize mechanical damage, such as dislocation nucleation and crack formation, resulting from large coherency strain energies.","cracks; crystallites; diffusion; dislocation nucleation; elastic moduli; electrochemical electrodes; finite element analysis; free energy; iron compounds; lithium compounds; phase separation; primary cells; secondary cells; solid solutions","en","journal article","The Electrochemical Society","","","","","","","","Applied Sciences","RRR/Radiation, Radionuclides and Reactors","","","",""
"uuid:18761d15-4d66-4e6f-9176-67e5a26d6e78","http://resolver.tudelft.nl/uuid:18761d15-4d66-4e6f-9176-67e5a26d6e78","Terahertz Near-Field Vectorial Imaging of Subwavelength Apertures and Aperture Arrays","Knab, J.R.; Adam, A.J.L.; Nagel, M.; Shaner, E.; Seo, M.A.; Kim, D.S.; Planken, P.C.M.","","2009","We present measurements of the complete terahertz (THz) electric near-field distribution, Ex, Ey and Ez, in both the time- and frequency-domains, for subwavelength apertures and subsections of subwavelength aperture arrays. Measuring the individual components of the THz near-field with subwavelength spatial resolution, as they emerge from these structures, illustrates how the field interacts with the apertures. We observe the small but measurable y- and z-components of the electric field for both single apertures and arrays. Resonant contributions, attributed to Bloch modes, are detected and we observe the presence of a longitudinal field component, Ez, within the different array apertures, which can be attributed to a diffractive effect. These measurements illustrate in detail the individual THz field components emerging from subwavelength apertures and provide a direct measure of two important mechanisms that contribute to the net transmission of light through arrays.","apertures; subwavelength structures; terahertz imaging","en","journal article","Optical Society of America","","","","","","","","Applied Sciences","Imaging Science and Technology","","","",""
"uuid:90623046-e65f-4644-89be-9a397a97dc19","http://resolver.tudelft.nl/uuid:90623046-e65f-4644-89be-9a397a97dc19","On the Mechanisms Governing Aluminum-Mediated Solid-Phase Epitaxy of Silicon","Civale, Y.; Vastola, G.; Nanver, L.K.; Mary-Joy, R.; Kim, J.R.","","2009","Mechanisms governing the aluminum-mediated solid-phase epitaxy of Si on patterned crystalline Si substrates have been identified by studying the deposited material as a function of growth conditions when varying parameters such as temperature, growth time, and layer-stack properties. Early growth stages can be discerned as first formation of “free” Si at the Al/?-Si interface, then diffusion of Si along the Al grain boundaries, nucleation at the Si substrate surface, nuclei rearrangement, and finally crystal growth. The acquired understanding is applied to control the selectivity and completeness of single-crystal growth in various sizes of contact windows to the Si substrate.","Aluminum doping; aluminum-induced crystallization; layer-exchange mechanisms; low-temperature doping; p +n diodes; silicon crystal growth; silicon epitaxy; solid-phase epitaxy","en","journal article","Springer","","","","","","","","Electrical Engineering, Mathematics and Computer Science","Delft Institute of Microsystems and Nanoelectronics DIMES","","","",""
"uuid:6d09f891-d1be-4ffb-90d3-f7eb1be4a0b5","http://resolver.tudelft.nl/uuid:6d09f891-d1be-4ffb-90d3-f7eb1be4a0b5","Diversity of Archaea and detection of crenarchaeotal amoA genes in the rivers Rhine and Têt","Herfort, L.; Kim, J.H.; Coolen, M.J.L.; Abbas, B.; Schouten, S.; Herndl, G.J.; Sinninghe Damste, J.S.","","2009","Pelagic archaeal phylogenetic diversity and the potential for crenarchaeotal nitrification of Group 1.1a were determined in the rivers Rhine and Têt by 16S rRNA sequencing, catalyzed reported deposition-fluorescence in situ hybridization (CARD–FISH) and quantification of 16S rRNA and functional genes. Euryarchaeota were, for the first time, detected in temperate river water even though a net predominance of crenarchaeotal phylotypes was found. Differences in phylogenic distribution were observed between rivers and seasons. Our data suggest that a few archaeal phylotypes (Euryarchaeota Groups RC-V and LDS, Crenarchaeota Group 1.1a) are widely distributed in pelagic riverine environments whilst others (Euryarchaeota Cluster Sagma-1) may only occur seasonally in river water. Crenarchaeota Group 1.1a has recently been identified as a major nitrifier in the marine environment and phylotypes of this group were also present in both rivers, where they represented 0.3% of the total pelagic microbial community. Interestingly, a generally higher abundance of Crenarchaeota Group 1.1a was found in the Rhine than in the Têt, and crenarchaeotal ammonia monooxygenase gene (amoA) was also detected in the Rhine, with higher amoA copy numbers measured in February than in September. This suggests that some of the Crenarchaeota present in river waters have the ability to oxidize ammonia and that riverine crenarchaeotal nitrification of Group 1.1a may vary seasonally.","archaea; river; diversity; nitrification","en","journal article","Inter-Research","","","","","","","","Applied Sciences","BT/Biotechnology","","","",""
"uuid:d80f57cc-0ae7-419b-8dd6-b1045b577212","http://resolver.tudelft.nl/uuid:d80f57cc-0ae7-419b-8dd6-b1045b577212","B-spline surface fitting using genetic algorithm","Le, Tat-Hien; Kim, Dong-Joon; Min, Kyong-Cheol; Pyo, Sang-Woo","","2009","","publications","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","","","",""
"uuid:b67444f8-bd1e-43c5-923b-482a11c31c39","http://resolver.tudelft.nl/uuid:b67444f8-bd1e-43c5-923b-482a11c31c39","Rudder Gap Flow Control for Cavitation Suppression","Oh, Jung-Keun; Lee, H.B.; Shin, K.; Lee, C.; Rhee, S.H.; Suh, J.C.; Kim, H.","","2009","","resistance & propulsion","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:a4897ff6-e4fd-473d-a315-9465e0da4f93","http://resolver.tudelft.nl/uuid:a4897ff6-e4fd-473d-a315-9465e0da4f93","A comparative study for the fatigue assessment of a ship structure by use of hot spot stress and structural stress approaches","Kim, M.H.","","2009","","construction","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ccb6c8c7-063d-40af-972d-ca59d0f21286","http://resolver.tudelft.nl/uuid:ccb6c8c7-063d-40af-972d-ca59d0f21286","A procedure for a strength assessment of permanent means of access structure","Jang, Beom-Seon; Chung, Sung-Wook; Ko, Dae-En; Chun, Min-Sung; Kim, Ji-Young","","2009","","construction","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:722cd8f5-3226-4080-a305-784a3bfde231","http://resolver.tudelft.nl/uuid:722cd8f5-3226-4080-a305-784a3bfde231","Time domain springing analysis on a floating barge under oblique wave","Kim, Yooil","","2009","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:bbc2783e-4e0c-458f-abe0-9972cb2b3b26","http://resolver.tudelft.nl/uuid:bbc2783e-4e0c-458f-abe0-9972cb2b3b26","Extended Boussinesq equations for rapidly varying topography","Kim, Gunwoo","","2009","","maritime general","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:00026cf3-8eae-49d4-aafa-f9a1deb62ea2","http://resolver.tudelft.nl/uuid:00026cf3-8eae-49d4-aafa-f9a1deb62ea2","A numerical study of unsteady cavitation on a hydrfoil","Kim, Sung-Eun","","2009","","publications","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","","","",""
"uuid:28322356-185e-4572-8773-6ffff305322b","http://resolver.tudelft.nl/uuid:28322356-185e-4572-8773-6ffff305322b","Generating cutter paths for marine propellers without intereference and gouging","Kim, Y.-C.","","2009","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:00fa5a0f-298d-43af-85a7-71e795eeb84e","http://resolver.tudelft.nl/uuid:00fa5a0f-298d-43af-85a7-71e795eeb84e","Springing analysis of a seagoing vessel using fully coupled BEM-FEM in the time domain","Kim, Yooil","","2009","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:098bcf17-f0c5-4543-abef-d2f4b69e6b1a","http://resolver.tudelft.nl/uuid:098bcf17-f0c5-4543-abef-d2f4b69e6b1a","nonlinear response of Offshore Structures to High Seas","Kim, Cheung Hun","","2009","","offshore","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:8790265d-cdf2-40e7-bbed-16b5a737b54a","http://resolver.tudelft.nl/uuid:8790265d-cdf2-40e7-bbed-16b5a737b54a","Transient effects of tendon disconnection on the survivability of a TLP in moderate-strength hurricane conditions","Kim, M.H.","","2009","","construction","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:b14aa5f6-0a32-4db7-9c81-50b1ae146fdb","http://resolver.tudelft.nl/uuid:b14aa5f6-0a32-4db7-9c81-50b1ae146fdb","Cross flow response of a cylindrical structure under local shear flow","Kim, Y.-C.","","2009","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:5542a304-3bd9-4ef8-93b0-cec9ed69e42f","http://resolver.tudelft.nl/uuid:5542a304-3bd9-4ef8-93b0-cec9ed69e42f","The simulation of the geometry of a tuna purse seine under current and drift of purse seiner","Kim, Yong-Hae","","2009","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:2061b2ff-9fa8-4b00-9c44-df0b6690d47c","http://resolver.tudelft.nl/uuid:2061b2ff-9fa8-4b00-9c44-df0b6690d47c","Design of propeller geometry using streamline-adapted blade sections","Kim, Y.-C.","","2009","","resistance & propulsion","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:2ab0ac5b-3d40-486e-8b92-c55571cf4e8d","http://resolver.tudelft.nl/uuid:2ab0ac5b-3d40-486e-8b92-c55571cf4e8d","Comparison of waterjet performance in tracked vehicles by impeller diameter","Kim, Moon-Chan","","2009","","resistance & propulsion","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:57fda921-788b-4270-b991-71c3c6db159f","http://resolver.tudelft.nl/uuid:57fda921-788b-4270-b991-71c3c6db159f","Radar cross section analysis of marine targets using a combining method of physical optics/geometric optics and a Monte-Carlo simulation","Kim, Kookhyun","","2009","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:6b6370aa-4d78-4e0e-af49-07a78d0fc467","http://resolver.tudelft.nl/uuid:6b6370aa-4d78-4e0e-af49-07a78d0fc467","Slip effects in vortical structure behind cavitating propeller wake","Paik, Bu-Geun; Kim, Kyung-Youl; Kim, Ki-Sup","","2009","","resistance & propulsion","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:0d005f8c-f2b8-466a-8c59-ff520f66db62","http://resolver.tudelft.nl/uuid:0d005f8c-f2b8-466a-8c59-ff520f66db62","Advanced terahertz electric near-field measurements at sub-wavelength diameter metallic apertures: Erratum","Adam, A.J.L.; Brok, J.M.; Seo, M.A.; Ahn, K.J.; Kim, D.S.; Kang, J.H.; Park, Q.H.; Nagel, M.; Planken, P.C.M.","","2008","An erratum is presented to correct an error in the discussion section of [Opt. Express. 16, 7407-7417 (2008)] and to add a relevant reference on earlier work.","apertures; near-field microscopy; spectroscopy; teraherz","en","journal article","Optical Society of America","","","","","","","","Applied Sciences","Imaging Science and Technology","","","",""
"uuid:b5d80d83-73fa-4317-89e2-90d1276a08f7","http://resolver.tudelft.nl/uuid:b5d80d83-73fa-4317-89e2-90d1276a08f7","Near field imaging of terahertz focusing onto rectangular apertures","Seo, M.A.; Adam, A.J.L.; Kang, J.H.; Lee, J.W.; Ahn, K.J.; Park, Q.H.; Planken, P.C.M.; Kim, D.S.","","2008","We performed terahertz near-field experiments on single rectangular holes with various lengths grown on an electro-optic crystal substrate with ?/100 resolution. We find that the near-field amplitude becomes proportionally larger as the rectangle becomes narrower, strongly suggesting that a constant energy passes through even for a very narrow slit. The occurrence of a large field enhancement at the fundamental localized resonance is discussed confirming the funneling of energy at the near-field.","microscopy; infrared; far; ultrafast spectroscopy","en","journal article","Optical Society of America","","","","","","","","Applied Sciences","Imaging Science and Technology","","","",""
"uuid:3f1f2b19-f2b2-4097-9353-2d94909a1a4d","http://resolver.tudelft.nl/uuid:3f1f2b19-f2b2-4097-9353-2d94909a1a4d","Microstructures and the corresponding magnetic properties of half-doped Nd0.5Sr0.5MnO3 films","Prokhorov, V.G.; Hyun, Y.H.; Park, J.S.; Kim, J.B.; Kim, G.H.; Lee, Y.S.; Lee, Y.P.; Svetchnikov, V.L.","","2008","The microstructural and magnetic properties of amorphous, nanoclustered, and self-organized bilayer Nd0.5Sr0.5MnO3 films, prepared by rf magnetron sputtering, are investigated. The amorphous film was found to be a typical paramagnet with free motion of the individual Mn spins, and the magnetic properties are well described on the basis of the Curie–Weiss approximation. The nanoclustered film manifests magnetic properties mimicking those of superparamagnetic particles following nonclassical magnetic dynamics. The self-organized bilayer film demonstrates a negative exchange bias typical of a ferromagnet/antiferromagnet hybrid system, in spite of the fact that both layers have a ferromagnetic origin. The magnetic properties of the films are discussed in detail on the basis of modern theoretical models.","amorphous state; antiferromagnetism; ferromagnetism; magnetic susceptibility; nanostructured materials; paramagnetism; sodium compounds; sputter deposition; strontium compounds; superparamagnetism; thin films","en","journal article","American Institute of Physics","","","","","","","","Applied Sciences","","","","",""
"uuid:92e1f04e-2265-47dc-a6ca-9c43a268ea3d","http://resolver.tudelft.nl/uuid:92e1f04e-2265-47dc-a6ca-9c43a268ea3d","Near-field studies of surface plasmon generation: Optical and terahertz studies","Kihm, H.W.; Lee, K.G.; Seo, M.A.; Ahn, K.J.; Adam, A.J.L.; Kang, J.H.; Park, Q.H.; Planken, P.C.M.; Kim, D.S.","","2008","We study the dielectric constant dependent diffraction phenomena of single slit apertures, both theoretically and experimentally. We experimentally simulate perfect metal and real metal cases by investigating subwavelength diffraction by a single slit, both in nano-optical and in terahertz regimes, keeping the slit-width/wavelength ratio approximately the same for both of frequency regimes. The wave-front in optical regime separates itself into forward propagating beam and surface-bound 90-degree diffracted wave, i.e., surface plasmon polaritons; while the separation of modes is not observed in terahertz regime.","near-field; THz spectroscopy; surface plasmon","en","conference paper","SPIE","","","","","","","","Applied Sciences","IST/Optica","","","",""
"uuid:d5cd4ac4-1d18-490c-b628-c9bb1593a5de","http://resolver.tudelft.nl/uuid:d5cd4ac4-1d18-490c-b628-c9bb1593a5de","Modeling of RO/NF membrane rejections of PhACs and organic compounds: A statistical analysis","Yangali-Quintanilla, V.; Kim, T.U.; Kennedy, M.; Amy, G.","","2008","Rejections of pharmaceutical compounds (Ibuprofen, Diclofenac, Clofibric acid, Naproxen, Primidone, Phenacetin) and organic compounds (Dichloroacetic acid, Trichloroacetic acid, Chloroform, Bromoform, Trichloroethene, Perchloroethene, Carbontetrachloride, Carbontetrabromide) by NF (Filmtec, Saehan) and RO (Filmtec, Saehan, Toray, Koch) membranes were studied. Chloroform presented the lowest rejection due to small molar volume, equivalent width and length. Diclofenac and Primidone showed high rejections related to high molar volume and length. Dichloroacetic acid and Trichloroacetic acid presented good rejections caused by charge exclusion instead of steric hindrance mechanism influencing rejection. Bromoform and Trichloroethene showed low rejections due to small length and equivalent width. Carbontetrabromide, Perchloroethene and Carbontetrachloride with higher equivalent width than BF and TCE presented better rejections. A qualitative analysis of variables using Principal Component Analysis was successfully implemented for reduction of physical-chemical compound properties that influence membrane rejection of PhACs and organic compounds. Properties such as dipole moment, molar volume, hydrophobicity/hydrophilicity, molecular length and equivalent width were found to be important descriptors for simulation of membrane rejection. For membranes used in the experiments, we may conclude that charge repulsion was an important mechanism of rejection for ionic compounds. After analysis with Multiple Linear Regression, we also may conclude that membrane rejection of neutral compounds was well predicted by molar volume, length, equivalent width, hydrophobicity/hydrophilicity and dipole moment. Molecular weight was a poor descriptor variable for rejection modelling. We were able to provide acceptable statistical significance for important results.","","en","journal article","","","","","","","","","Civil Engineering and Geosciences","","","","",""
"uuid:e4fcc516-4c9f-40f6-a3d6-0b14442b42a2","http://resolver.tudelft.nl/uuid:e4fcc516-4c9f-40f6-a3d6-0b14442b42a2","Usage of fiber Bragg grating sensors in low earth orbit environment","Park, S.O.; Moon, J.B.; Lee, Y.G.; Kim, C.G.; Bhowmik, S.","","2008","It is widely known that materials exposed to the severe low earth orbit (LEO) environment undergo degradations. For the evaluation of fiber Bragg grating (FBG) sensors in the LEO environment, the reflective spectrum change and the Bragg wavelength shift of FBG sensor were measured during aging cycles simulating the LEO environment. The LEO environment was simulated by high vacuum (~10-5 Torr), ultraviolet (UV) radiation (<200nm wavelength), temperature cycling (-30°C~100°C), and atomic oxygen atmosphere (AO flux of 9.12×1014 atoms/cm2/s and kinetic energy of ~0.04 eV). FBG sensor arrays were embedded into the graphite/epoxy composite material. Through the aging cycles simulated for the LEO environment, the change in the reflective spectrums and the Bragg wavelengths from FBG sensors were investigated.","composites; low earth orbit; fiber Bragg grating","en","conference paper","SPIE","","","","","","","","Aerospace Engineering","Aerospace Materials","","","",""
"uuid:22e25de6-b248-43e9-a8fc-a5be54f46969","http://resolver.tudelft.nl/uuid:22e25de6-b248-43e9-a8fc-a5be54f46969","Advanced terahertz electric near-field measurements at sub-wavelength diameter metallic apertures","Adam, A.J.L.; Brok, J.M.; Seo, M.A.; Ahn, K.J.; Kim, D.S.; Kang, J.H.; Park, Q.H.; Nagel, M.; Planken, P.C.M.","","2008","Using terahertz-light excitation, we have measured with sub-wavelength spatial, and sub-cycle temporal resolution the time- and frequency-dependent electric-field and surface-charge density in the vicinity of small metallic holes. In addition to a singularity like concentration of the electric field near the hole edges, we observe, that holes can act as differential operators whose near-field output is the time-derivative of the incident electric field. Our results confirm the well-known predictions made by Bouwkamp, Philips Res. Rep. 5, 321-332 (1950), and reveal, with unprecedented detail, what physically happens when light passes through a small hole.","apertures; near-field microscopy; spectroscopy; teraherz","en","journal article","Optical Society of America","","","","","","","","Applied Sciences","Imaging Science and Technology","","","",""
"uuid:e83dcad6-4be4-40a6-a625-f54ee193d903","http://resolver.tudelft.nl/uuid:e83dcad6-4be4-40a6-a625-f54ee193d903","Prediction of RO/NF membrane rejections of PhACs and organic compounds: A statistical analysis","Yangali-Quintanilla, V.; Kim, T.U.; Kennedy, M.; Amy, G.","","2008","OA fund TU Delft Rejections of pharmaceutical compounds (Ibuprofen, Diclofenac, Clofibric acid, Naproxen, Primidone, Phenacetin) and organic compounds (Dichloroacetic acid, Trichloroacetic acid, Chloroform, Bromoform, Trichloroethene, Perchloroethene, Car-bontetrachloride, Carbontetrabromide) by NF (Filmtec, Saehan) and RO (Filmtec, Saehan, Toray, Koch) membranes were studied. Chloroform presented the lowest rejection due to small molar volume, equivalent width and length. Diclofenac and Primidone showed high rejections related to high molar volume and length. Dichloroacetic acid and Trichloroacetic acid presented good rejections caused by charge exclusion instead of steric hindrance mechanism influencing rejection. Bromoform and Trichloroethene showed low rejections due to small length and equivalent width. Carbontetrabromide, Perchloroethene and Carbontetrachloride with higher equivalent width than BF and TCE presented better rejections. A qualitative analysis of variables using Principal Component Analysis was successfully implemented for reduction of physical chemical compound properties that influence membrane rejection of PhACs and organic compounds. Properties such as dipole moment, molar volume, hydrophobicity/hydrophilicity, molecular length and equivalent width were found to be important descriptors for prediction of membrane rejection. Ionic and neutral compounds were successfully separated before analysis. For membranes used in the experiments, we may conclude that charge repulsion was an important mechanism of rejection for ionic compounds. Molecular weight was a poor variable for rejection prediction. Membrane rejection of neutral compounds was well predicted by dipole moment, molar volume, length, equivalent width and hydrophobicity/hydrophilicity of compounds after analysis with Multiple Linear Regression.","","en","journal article","Copernicus Publications","","","","","","","","Civil Engineering and Geosciences","Water Management","","","",""
"uuid:988a4cf2-c6bf-4120-b010-1927fab6e49f","http://resolver.tudelft.nl/uuid:988a4cf2-c6bf-4120-b010-1927fab6e49f","Fatigue Assessment of Ship Structures using Hot Spot Stress and Structural Stress Apporaches with Experimental Validation","Kim, Myung Hyun","","2008","","construction","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:d318a2d8-50ba-4e0f-8f18-ab4b6d7bd484","http://resolver.tudelft.nl/uuid:d318a2d8-50ba-4e0f-8f18-ab4b6d7bd484","Optical and terahertz near-field studies of surface plasmons in subwavelength metallic slits","Ahn, K.J.; Lee, K.G.; Kihm, H.W.; Seo, M.A.; Adam, A.J.L.; Planken, P.C.M.; Kim, D.S.","","2008","","","en","journal article","IOP","","","","","","","","Applied Sciences","","","","",""
"uuid:3d72b52f-a3c9-4586-ae25-c936a05594c7","http://resolver.tudelft.nl/uuid:3d72b52f-a3c9-4586-ae25-c936a05594c7","A study of 3-D design data extraction for thermal forming information","Kim, Jung","","2008","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:5619e202-eb9c-4fef-92fe-eb2384222500","http://resolver.tudelft.nl/uuid:5619e202-eb9c-4fef-92fe-eb2384222500","On technical issues in the analysis of nonlinear ship motion and structural loads in waves by a time-domain Rankine panel method","Kim, K.H.","","2008","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:a3423dd8-b1be-4b9a-a652-92195b5c2421","http://resolver.tudelft.nl/uuid:a3423dd8-b1be-4b9a-a652-92195b5c2421","Experimental and Improved Numerical Studies on Aerodynamic Characteristics of Low Aspect Ratio Wings foa a Wing-In Ground Effect Ship","Ahn, Byoung-Kwon; Lee, Chang-Sup; Kim, Hyoung-Tae; Lew, Jae-Moon","","2008","","resistance & propulsion","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:c81d3856-0ab1-46b3-a5d1-701d74205599","http://resolver.tudelft.nl/uuid:c81d3856-0ab1-46b3-a5d1-701d74205599","Analysis of springing effects on floating barges in time domain by a fully coupled hybrid BEM-FEM","Kim, Yooil","","2008","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:290a8429-6316-433f-b052-7b639e2be62a","http://resolver.tudelft.nl/uuid:290a8429-6316-433f-b052-7b639e2be62a","Solar absorption cooling","Kim, D.S.","Van der Ree, H. (promotor); Infante Ferreira, C.A. (promotor)","2007","As the world concerns more and more on global climate changes and depleting energy resources, solar cooling technology receives increasing interests from the public as an environment-friendly and sustainable alternative. However, making a competitive solar cooling machine for the market still remains a challenge to the academic and industrial communities. In an effort to meet this challenge, this thesis reports the R&D activities carried out for the development of a new solar cooling machine, which works with low-temperature heat from economic flat solar thermal collectors based on a half-effect LiBr-water absorption refrigeration cycle. This thesis consists of 8 chapters, each of which is dedicated for the description of a specific part of the R&D activities carried out in the development.","solar cooling; absorption; lithium bromide; water","en","doctoral thesis","","","","","","","","","Mechanical Maritime and Materials Engineering","","","","",""
"uuid:fc6f6242-c92f-4a26-9a8d-d0ac66c51f5c","http://resolver.tudelft.nl/uuid:fc6f6242-c92f-4a26-9a8d-d0ac66c51f5c","Fourier-transform terahertz near-field imaging of one-dimensional slit arrays: Mapping of electric-field-, magnetic-field-, and Poynting vectors","Seo, M.A.; Adam, A.J.L.; Kang, J.H.; Lee, J.W.; Jeoung, S.C.; Park, Q.H.; Planken, P.C.M.; Kim, D.S.","","2007","We present 2D measurements of the full THz electric field behind a sample consisting of multiple slits in a metal foil. Our measurements, which have a sub-wavelength spatial, and a sub-period temporal resolution, reveal electric field lines, electric field vortices and saddle points. From our measurements we are able to reconstruct the magnetic field and, finally, the position and time-dependent Poynting vector which shows the flow of energy behind the sample. Our results show that it is possible to study the flow of light near sub-wavelength plasmonic structures such as slit-arrays and, by implication, other metamaterial samples.","microscopy; infrared, far; ultrafast technology","en","journal article","Optical Society of America","","","","","","","","Applied Sciences","Imaging Science and Technology","","","",""
"uuid:8ce1e74a-afc3-4bb1-bdb9-f24f32ad9d42","http://resolver.tudelft.nl/uuid:8ce1e74a-afc3-4bb1-bdb9-f24f32ad9d42","Fracture and size effects in weakly cemented sand","Kim, Tae Hoon","","2007","","offshore","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:329652d0-da9c-4a84-9b09-e4fc1b65c3d9","http://resolver.tudelft.nl/uuid:329652d0-da9c-4a84-9b09-e4fc1b65c3d9","Sensitivity study of smoothed particle hydrodynamics","Kim, Yooil","","2007","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:5ca8ada4-eedb-42d8-b539-54671a1bba37","http://resolver.tudelft.nl/uuid:5ca8ada4-eedb-42d8-b539-54671a1bba37","Wing-In-Ground effect on free surface","Kim, Yong-Hwan","","2007","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:285ed268-903e-422c-a073-2ab899cdc4c3","http://resolver.tudelft.nl/uuid:285ed268-903e-422c-a073-2ab899cdc4c3","Prediction of the maneuverability of a large container ship with twin propellers and twin rudders","Kim, Y.-G.","","2007","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:e3b7778a-36a9-4cd3-a311-416b8f186817","http://resolver.tudelft.nl/uuid:e3b7778a-36a9-4cd3-a311-416b8f186817","A preliminary structural design study on high performance container crane","Kim, Ki-Sung","","2007","","construction","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ffbdee91-9994-4364-b39b-3786ef491093","http://resolver.tudelft.nl/uuid:ffbdee91-9994-4364-b39b-3786ef491093","Steady flow approximations in three-dimensional ship motion calculation","Kim, Booki","","2007","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:c8dcce2e-159d-45be-ae23-c84f7a022d65","http://resolver.tudelft.nl/uuid:c8dcce2e-159d-45be-ae23-c84f7a022d65","Numerical modeling for the accurate computations of arc-heater flows","Lee, J.I.; Kim, C.; Kim, K.H.","","2006","The purpose of this paper is to develop an accurate analysis code for the flow of arc-heater by employing advanced numerical models. Governing equations are hyperbolic-type axisymmetric Navier-Stokes equations which include joule heating by arc, radiation and turbulent transport effect. Joule heating is simply calculated by Ohms law with the given distribution of current. Radiation is computed by the three-band model which accounts for self-absorption and is consistent with the detailed line-by-line radiation model. Turbulence effect is incorporated by two-equation turbulence models which can describe the transport of turbulence. In order to assess the performance of the newly developed code, AHF and IHF are calculated in various operating conditions. And, it is confirmed that two-equation turbulence models combined with the three-band radiation model simulate the flow physics in arc-heater more accurately than any other previous models and the influence of the turbulence is as much as or bigger than radiation effect.","plasma wind tunnel; arc-heater; joule heating; radiation; turbulence","en","conference paper","","","","","","","","","","","","","",""
"uuid:76724cc6-9406-40f2-807f-1e635ab22304","http://resolver.tudelft.nl/uuid:76724cc6-9406-40f2-807f-1e635ab22304","Aerodynamic Shape Optimization using Discrete Adjoint Formulation based on Overset Mesh Technique","Lee, B.J.; Kim, C.","","2006","A new design approach for a delicate treatment of complex geometries such as wing/body configuration is arranged using overset mesh technique under large scale computing environment. For the in-depth study of the flow physics and highly accurate design, several special overlapped structured blocks such as collar grid, tip-cap grid, and etc. which are commonly used in refined drag prediction are adopted to consider the applicability of the design code to practical problems. Various pre- and post-processing techniques for overset flow analysis and sensitivity analysis are devised or implemented to adapt overset mesh technique to the design optimization problem based on Gradient Based Optimization Method (GBOM). In the pre-processing, the convergence characteristics of the flow solver and sensitivity analysis are improved by overlap optimization method. Moreover, a new post-processing method, Spline-Boundary Intersecting Grid (S-BIG) scheme, is proposed by considering the ratio of cell area for more refined prediction of aerodynamic coefficients and convenient evaluation of sensitivities under parallel computing environment. For the sensitivity analysis, adjoint formulations for overset boundary conditions are implemented into the existing fully hand-differentiated sensitivity analysis code. A smooth geometric modification on the overlapped surface boundaries and evaluation of analytic grid sensitivities can be performed by Spline patch and mapping from physical grids to the patched Spline function. Careful design works for the drag minimization problem of DLR-F4 are performed using the newly-developed and -applied techniques. And the design results from conventional design problem demonstrate the capability of the present design approach successfully.","discrete adjoint variable method; overset approach; optimal shape design; BSpline; S-BIG (Spline-Boundary Intersecting Grid)","en","conference paper","","","","","","","","","","","","","",""
"uuid:eaa368a9-e3a7-4bea-baee-d4f129046780","http://resolver.tudelft.nl/uuid:eaa368a9-e3a7-4bea-baee-d4f129046780","Shape resonance omni-directional terahertz filters with near-unity transmittance","Lee, J.W.; Seo, M.A.; Park, D.J.; Kim, D.S.; Jeoung, S.C.; Lienau, C.; Park, Q.H.; Planken, P.C.M.","","2006","Terahertz transmission filters have been manufactured by perforating metal films with various geometric shapes using femtosecond laser machining. Two dimensional arrays of square, circular, rectangular, cshaped, and epsilon-shaped holes all support over 99% transmission at specific frequencies determined by geometric shape, symmetry, polarization, and lattice constant. Our results show that plasmonic structures with different geometric shaped holes are extremely versatile, dependable, easy to control and easy to make terahertz filters.","apertures; surface waves; spectroscopy; far infrared","en","journal article","Optical Society of America","","","","","","","","Applied Sciences","Imaging Science and Technology","","","",""
"uuid:fb6b63ff-4847-4ad7-b784-733584b72ba3","http://resolver.tudelft.nl/uuid:fb6b63ff-4847-4ad7-b784-733584b72ba3","Numerical computation for the comparison of stern flows around various twin skegs","Kim, Jin","","2006","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:17857754-eb58-411c-96a2-0845cc20a906","http://resolver.tudelft.nl/uuid:17857754-eb58-411c-96a2-0845cc20a906","Accurate and practical thruster modeling for underwater verhicles","Kim, Jinhyun","","2006","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:0a8c621c-bc19-4e74-871b-6129cb8cdabe","http://resolver.tudelft.nl/uuid:0a8c621c-bc19-4e74-871b-6129cb8cdabe","Computational and experimental study on performance of sails of a yacht","Yoo, Jaehoon; Kim, Hyoung Tae","","2006","","yachting; Sailing yacht; CFD; Wind tunnel","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:30397db2-d018-4e8b-b034-535c4bfe6bd8","http://resolver.tudelft.nl/uuid:30397db2-d018-4e8b-b034-535c4bfe6bd8","Microstructural and magnetotransport properties of La0.7Ca0.3MnO3/BaTiO3 and La0.7Sr0.3MnO3/BaTiO3 bilayered films","Lee, Y.P.; Park, S.Y.; Hyun, Y.H.; Kim, J.B.; Prokhorov, V.G.; Komashko, V.A.; Svetchnikov, V.L.","","2006","","","en","journal article","American Physical Society","","","","","","","","","","","","",""
"uuid:48fa6aeb-543c-4ceb-be74-68ba52dca526","http://resolver.tudelft.nl/uuid:48fa6aeb-543c-4ceb-be74-68ba52dca526","A 3-dimentional radiation diffraction problem analysis by B-Spline higher-order panel method","Kim, Gun-Do","","2006","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:b7c81c8a-4d64-428e-9fef-281bf7f8000e","http://resolver.tudelft.nl/uuid:b7c81c8a-4d64-428e-9fef-281bf7f8000e","Electron localization in metallic quantum wells: Pb versus In on Si(111)","Dil, J.H.; Kim, J.W.; Kampen, Th.; Horn, K.; Ettema, A.R.H.F.","","2006","","","en","journal article","American Physical Society","","","","","","","","Applied Sciences","","","","",""
"uuid:d2bafbaf-7034-4c55-813b-05dcb688d41f","http://resolver.tudelft.nl/uuid:d2bafbaf-7034-4c55-813b-05dcb688d41f","A new approach to robustly exchange models in heterogeneous CAD/CAE environment and its application","Kim, In-Il","","2006","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:3aa17c56-8045-4a31-a15b-05fe0eb60d0e","http://resolver.tudelft.nl/uuid:3aa17c56-8045-4a31-a15b-05fe0eb60d0e","A numerical study of turbulent flow around a twin-skeg container ship model with appendages","Kim, Hyoung-Tae","","2006","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:c4e98238-d40a-4a3c-b513-ca220f01616c","http://resolver.tudelft.nl/uuid:c4e98238-d40a-4a3c-b513-ca220f01616c","Hybrid RANS and potential based numerical simulation for self-propulsion performances of the practical container ship","Kim, Jin","","2006","","resistance & propulsion","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ade5d606-3f2f-4bc5-a226-e56e1b3ac117","http://resolver.tudelft.nl/uuid:ade5d606-3f2f-4bc5-a226-e56e1b3ac117","Vessel/mooring/riser coupled dynamic analysis of a turret-moored FPSO compared with OTRC experiment","Kim, M.H.","","2005","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:1ae530ea-ab2f-4e87-b572-8d08237b6d9b","http://resolver.tudelft.nl/uuid:1ae530ea-ab2f-4e87-b572-8d08237b6d9b","Hydrodynamic interactions and relative motions of two floating platforms with mooring lines in side-by-side offloading operation","Koo, B.J.; Kim, M.H.","","2005","","offshore","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:cf121b4a-e5cb-4321-8544-f5e5ea92bcc0","http://resolver.tudelft.nl/uuid:cf121b4a-e5cb-4321-8544-f5e5ea92bcc0","Application of arbitrary Lagrangian-Eulerian Technique for air explosion structural analysis for Naval Ships using LS-DYNA","Kim, Jae-Hyun","","2005","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:d84f4c09-59c8-43c0-9cfe-7773d5c112f7","http://resolver.tudelft.nl/uuid:d84f4c09-59c8-43c0-9cfe-7773d5c112f7","Neural network for design and reliability analysis of rubble mound breakwaters","Kim, D.H.","","2005","","maritime general","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:a3f2b1d9-d49a-4269-825e-70ed96e21983","http://resolver.tudelft.nl/uuid:a3f2b1d9-d49a-4269-825e-70ed96e21983","Real-coded micro-genetic algorithm for nonlinear constrained engineering designs","Kim, Yunyoung","","2005","","publications","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:bd4bb3b1-6409-4e25-a2a7-83720004066c","http://resolver.tudelft.nl/uuid:bd4bb3b1-6409-4e25-a2a7-83720004066c","An experimental study on friction reduction by additives in a water channel","Kim, Wu-Joan","","2005","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:d40765c9-382a-40cf-8eca-53ae359c33de","http://resolver.tudelft.nl/uuid:d40765c9-382a-40cf-8eca-53ae359c33de","Dynamics analysis of multiple-body floating platforms coupled with mooring lines and risers","Kim, Y.-B.","","2005","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:b6530b54-267e-47d7-aa8b-5abdfe59ccbb","http://resolver.tudelft.nl/uuid:b6530b54-267e-47d7-aa8b-5abdfe59ccbb","Development of the abstract test cases of ship STEP","Kim, Young-Dae","","2005","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:f017a7f2-f060-4ede-bb8e-3cc10111032d","http://resolver.tudelft.nl/uuid:f017a7f2-f060-4ede-bb8e-3cc10111032d","The estimation of wave elevation and wave disturbance caused by the wave orbital motion of a fully submerged hydrofoil craft","Kim, Sung-Hoon","","2005","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:fc05f380-bd12-4183-9277-b948205cd293","http://resolver.tudelft.nl/uuid:fc05f380-bd12-4183-9277-b948205cd293","Parametric design of complex hull forms","Kim, Hyun-Cheol","","2005","","construction","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:07a23e06-d001-4273-aae3-5133b0bca26f","http://resolver.tudelft.nl/uuid:07a23e06-d001-4273-aae3-5133b0bca26f","Evidence against a charge density wave on Bi(111)","Kim, T.K.; Wells, J.; Kirkegaard, C.; Li, Z.; Hoffmann, S.V.; Gayone, J.E.; Fernandez-Torrente, I.; Häberle, P.; Pascual, J.I.; Moore, K.T.; Schwartz, A.J.; He, H.; Spence, J.C.H.; Downing, K.H.; Lazar, S.; Tichelaar, F.D.; Borisenko, S.V.; Knupfer, M.; Hofmann, Ph.","","2005","","","en","journal article","American Physical Society","","","","","","","","","","","","",""
"uuid:12fbe761-8c39-4036-9b34-cb734c7b8d3b","http://resolver.tudelft.nl/uuid:12fbe761-8c39-4036-9b34-cb734c7b8d3b","Anti-Sway Control of a Container Crane with Two Different Approaches: ODE and PDE","Kim, C.W.","","2005","","","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Transport Engineering and Logistics","","",""
"uuid:72ae0d9a-2d2a-4e1a-8990-953ede1ed70d","http://resolver.tudelft.nl/uuid:72ae0d9a-2d2a-4e1a-8990-953ede1ed70d","Numerical study on slosh-induced impact pressures on three-dimensional prismatic tanks","Kim, Yooil","","2004","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:57ed004d-8045-4006-a39d-fa2617cbe81a","http://resolver.tudelft.nl/uuid:57ed004d-8045-4006-a39d-fa2617cbe81a","Global cutting-path optimization considering the minimum heat effect with microgenetic algorithms","Kim, Yooil","","2004","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:bc45f849-41be-4a4e-8456-3a2e88643e73","http://resolver.tudelft.nl/uuid:bc45f849-41be-4a4e-8456-3a2e88643e73","On the design of longitudinal motion control system of a fully-submerged hydrofoil craft based on the optimal preview servo system","Kim, Sung-Hoon","","2004","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:b7ab5790-1c2f-4b74-987c-d924764968d3","http://resolver.tudelft.nl/uuid:b7ab5790-1c2f-4b74-987c-d924764968d3","Practical spreading of driving forces for wave-driven currents","Kim, H.","","2004","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:81b9de00-5620-4dc3-815c-61fc097bf216","http://resolver.tudelft.nl/uuid:81b9de00-5620-4dc3-815c-61fc097bf216","An experimental study of the longitudinal motion control of a fully submerged hydrofoil model in following seas","Kim, Sung-Hoon","","2004","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:6fa2c1cc-523d-42f5-b2bb-bded5f920552","http://resolver.tudelft.nl/uuid:6fa2c1cc-523d-42f5-b2bb-bded5f920552","RANS simulation of a tip-leakage vortex on a ducted marine propulsor","Kim, Jin","","2004","","resistance & propulsion","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:408821e8-12c7-489b-9171-b8c9e2a4b74c","http://resolver.tudelft.nl/uuid:408821e8-12c7-489b-9171-b8c9e2a4b74c","Design and experimental study on a new concept of preswirl stator as an efficient energy-saving device for slow speed full body ship","Kim, Moon-Chan","","2004","","hydrodynamics","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:880488e8-d78f-4e2c-97a2-9f02e49dea1f","http://resolver.tudelft.nl/uuid:880488e8-d78f-4e2c-97a2-9f02e49dea1f","A NURBS pabnel method for three-dimensional radiation and diffraction problems","Kim, Boo-Ki","","2003","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ff9c6b85-d84b-4972-933f-34373b01acca","http://resolver.tudelft.nl/uuid:ff9c6b85-d84b-4972-933f-34373b01acca","Annual sea state occurrences around the Korean Peninsula","Kim, Sung-Hoon","","2003","","maritime general","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:990fac65-2275-4b5b-a116-0487d2847939","http://resolver.tudelft.nl/uuid:990fac65-2275-4b5b-a116-0487d2847939","Effect of desingularization and collocation-point shift on steady waves with forward speed","Kim, Yong-Hwan","","2003","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:0e45300f-8514-40b3-a49e-17f46effc4c7","http://resolver.tudelft.nl/uuid:0e45300f-8514-40b3-a49e-17f46effc4c7","Unified theory for the radiation problem of multiple slender bodies","Kim, Yong-Hwan","","2003","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:f76de65d-66f4-4998-840b-1459e9ea4063","http://resolver.tudelft.nl/uuid:f76de65d-66f4-4998-840b-1459e9ea4063","Design of a waterjet propulsion system for an amphibious tracked vehicle","Kim, Moon-Chan","","2003","","resistance & propulsion","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:84057a5c-48c7-43dd-b03c-d4bb25f35c07","http://resolver.tudelft.nl/uuid:84057a5c-48c7-43dd-b03c-d4bb25f35c07","Automatic two-dimensional layout using a rule-based heuristic algorithm","Kim, Yooil","","2003","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ff874a1d-02e9-4ae2-b9f3-3db706fd87ff","http://resolver.tudelft.nl/uuid:ff874a1d-02e9-4ae2-b9f3-3db706fd87ff","A numerical study on sloshing flows coupled with ship motion – The anti-rolling tank problem","Kim, Yong-Hwan","","2002","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:beb495e1-d246-4a9f-98db-b1dd839f0b38","http://resolver.tudelft.nl/uuid:beb495e1-d246-4a9f-98db-b1dd839f0b38","Prediction of motion responses between two offshore floating structures in waves","Kim, Mun-Sung","","2002","","offshore","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:84863dc2-bf2f-4252-9261-b1294ae3e2e9","http://resolver.tudelft.nl/uuid:84863dc2-bf2f-4252-9261-b1294ae3e2e9","Nonlinear dynamics and stability of spread mooring with riser","Kim, Boo-Ki; Bernitsas, M.M.","","2001","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:02c776d4-4b00-40c6-b343-9be65619f0be","http://resolver.tudelft.nl/uuid:02c776d4-4b00-40c6-b343-9be65619f0be","Fatigue strength of load-carrying box fillet weldment in ship structure","Kim, Wha Soo; Kim, Doe Hyun; Lee, Sang Gab; Lee, Yoon Ki","","2001","","construction","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:d040afc9-3cf5-4500-bd8d-cff23f64d0b8","http://resolver.tudelft.nl/uuid:d040afc9-3cf5-4500-bd8d-cff23f64d0b8","A CFD-based parametric study on the smoke behavior of a typical merchant ship","Jin, E.; Yoon, J.; Kim, Y.","","2001","","hydrodynamics","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","","","",""
"uuid:3f4c7e1d-8651-469b-bf52-d7683a0b0be4","http://resolver.tudelft.nl/uuid:3f4c7e1d-8651-469b-bf52-d7683a0b0be4","Motion responses of high speed vessels in regular and random waves","Kim, Yong-Hwan","","2000","","hydrodynamics","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:2d246ab3-c0e0-404a-84d3-3eb2d0aad75a","http://resolver.tudelft.nl/uuid:2d246ab3-c0e0-404a-84d3-3eb2d0aad75a","On advanced buckling and ultimate strength design of ship plating","Paik, Jeom Kee; Thayamballi, Anil K.; Wang, Ge; Kim, Bong Ju","","2000","","construction","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:66f2d0dd-089d-4389-82ac-dbea97755206","http://resolver.tudelft.nl/uuid:66f2d0dd-089d-4389-82ac-dbea97755206","Numerical analysis of sloshing problem","Kim, Yong-Hwan","","2000","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:cb03df22-e5fb-45d8-ada9-ddc89bf252d8","http://resolver.tudelft.nl/uuid:cb03df22-e5fb-45d8-ada9-ddc89bf252d8","Linear frequency domain hydroelastic analysis for McDermott’s mobile offshore base using WAMIT","Kim, D.","","1999","","offshore","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:049ad6cd-1145-46fc-b40f-b757f153e0ef","http://resolver.tudelft.nl/uuid:049ad6cd-1145-46fc-b40f-b757f153e0ef","Effect of memory on the stability of spread mooring systems","Kim, Boo-Ki","","1999","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:41330222-912e-4016-ab74-53985770fe74","http://resolver.tudelft.nl/uuid:41330222-912e-4016-ab74-53985770fe74","Hydroelastic response analysis of pontoon type very large floating structures by th component mode synthesis method","Kim, Byung-Hyun","","1999","","offshore","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:c6889e20-eaf7-4143-b553-0c1899f09e97","http://resolver.tudelft.nl/uuid:c6889e20-eaf7-4143-b553-0c1899f09e97","A numerical study of non-linear wave intercation in irregular seas: Irrotational Green-Haghdi model","Kim, J.W.","","1999","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:d4edac97-f81f-44c7-af84-7de5f500d707","http://resolver.tudelft.nl/uuid:d4edac97-f81f-44c7-af84-7de5f500d707","Application of generic algorithm to inspection planning of fatigue deteriorating structure","Kim, Sungchan","","1998","","construction","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ba521af9-00a6-41cb-b1a9-0cdd55b498d9","http://resolver.tudelft.nl/uuid:ba521af9-00a6-41cb-b1a9-0cdd55b498d9","A Finite-Depth Unified Theory of Ship Motion","Kim, Yonghwan; Sclavounos, P.D.","","1998","","hydrodynamics; Finite depth; ship motion","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:edf5b494-e952-40ed-ab64-d7696a98144f","http://resolver.tudelft.nl/uuid:edf5b494-e952-40ed-ab64-d7696a98144f","A finite-depth unfied theory for the linear and second-order problems of slender ships","Kim, Yong-Hwan","","1998","","hydrodynamics; Second-order; problems","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:64181a0c-1e02-46d1-98c8-0f7198847ef3","http://resolver.tudelft.nl/uuid:64181a0c-1e02-46d1-98c8-0f7198847ef3","Effect of slow-drift loads an nonlinear dynamics of spread mooring systems","Bernitsas, Michael M.; Kim, Boo-Ki","","1998","","offshore","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:b544fa7b-4829-482f-a162-1d39068fa240","http://resolver.tudelft.nl/uuid:b544fa7b-4829-482f-a162-1d39068fa240","Effect of memory on the stability of spread mooring systems","Kim, Boo-Ki; Bernitsas, M.M.","","1998","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:46f1ccac-6674-4a36-8b53-782fde8128c5","http://resolver.tudelft.nl/uuid:46f1ccac-6674-4a36-8b53-782fde8128c5","Fully nonlinear interactions of waves with a three-dimensional body in uniform currents","Kim, M.H.","","1998","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:80c626f5-50d5-4bc2-902b-87753623b23d","http://resolver.tudelft.nl/uuid:80c626f5-50d5-4bc2-902b-87753623b23d","Linear and nonlineaer interactions of surface waves with bodies by a three-dimensional Rankine Panel Method","Kim, Yong-Hwan","","1997","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:8a599b0c-cf0b-44f4-907f-da34cd8c5d8f","http://resolver.tudelft.nl/uuid:8a599b0c-cf0b-44f4-907f-da34cd8c5d8f","A computational method as an advanced tool of ship hydrodynamic design","Sclavounos, Paul D.; Kring, David C.; Huang, Y.; Mantzaris, D.A.; Kim, S.; Kim, Y.","","1997","","hydrodynamics","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:6600e6ad-a1ed-4ba3-9941-1a9bcbe5b148","http://resolver.tudelft.nl/uuid:6600e6ad-a1ed-4ba3-9941-1a9bcbe5b148","Angular bias errors in three-component laser velocimeter measurements","Chen, C.Y.; Kim, P.J.; Walker, D.T.","","1996","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:841ef7f6-91a7-4b79-ab63-54c9e8104155","http://resolver.tudelft.nl/uuid:841ef7f6-91a7-4b79-ab63-54c9e8104155","Coupled hydrodynamic impact and elastic response","Kim, Dong Joon","","1996","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:d72432c4-66cb-4de7-9801-4306907d5e23","http://resolver.tudelft.nl/uuid:d72432c4-66cb-4de7-9801-4306907d5e23","An experimental and computational study on the flow around a hydrofoil with a free surface","Kim, Wu-Joan","","1995","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:7a40fca8-22f7-4a5c-9a16-28ed1b9325de","http://resolver.tudelft.nl/uuid:7a40fca8-22f7-4a5c-9a16-28ed1b9325de","Computations of viscous flow around propeller-body configurations: Series 60 CB = 0.6 ship model","Stern, F.; Kim, H.T.; Zang, D.H.; Toda, Y.; Kerwin, J.; Jessup, S.","","1994","","resistance & propulsion","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:69251de9-eecc-4281-a30f-57c54e206eb7","http://resolver.tudelft.nl/uuid:69251de9-eecc-4281-a30f-57c54e206eb7","Second-order sum-frequency wave loads on large-volume structures","Kim, M.H.","","1991","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:5655a308-dfed-44ec-bb1e-20a447c1b54c","http://resolver.tudelft.nl/uuid:5655a308-dfed-44ec-bb1e-20a447c1b54c","Ship Flow Calculations and Resistance Minimization by Keun Jae Kim, Chalmers University of Technology, Goteborg, Sweden","Kim, Keun Jae","","1989","","resistance & propulsion","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:d5b0248e-3634-4c80-aa8d-8f92d3064f60","http://resolver.tudelft.nl/uuid:d5b0248e-3634-4c80-aa8d-8f92d3064f60","Slowly-varying wave drift forces in short crested irregular seas","Kim, M.H.","","1989","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:44da7c7f-f466-4686-9526-0487b16799e4","http://resolver.tudelft.nl/uuid:44da7c7f-f466-4686-9526-0487b16799e4","Calculation of ship viscous resistance using boundary layer theory based on first or higher order approximations","Kim, Keun Jae","","1988","","hydrodynamics","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:4c9c2158-e8fb-49a4-ade8-768d979aa67d","http://resolver.tudelft.nl/uuid:4c9c2158-e8fb-49a4-ade8-768d979aa67d","A strip method for the prediction of lateral drift force of a semi-submersible","Kim, Cheung Hun","","1985","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:4fd6089e-ebf0-4c8f-87f5-8e839526b4c6","http://resolver.tudelft.nl/uuid:4fd6089e-ebf0-4c8f-87f5-8e839526b4c6","Computation of the Second-Order steady forces acting on a surface ship in an oblique wave","Kim, Y.H.","","1981","","hydrodynamics","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:5d095b9d-fcb7-4d60-8381-8eb4181ed1bf","http://resolver.tudelft.nl/uuid:5d095b9d-fcb7-4d60-8381-8eb4181ed1bf","Motions and hydrodynamic loads of a ship advancing in oblique waves","Kim, Cheung Hun","","1980","","hydrodynamics","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:7df31353-223f-4105-887a-51f637f4af2b","http://resolver.tudelft.nl/uuid:7df31353-223f-4105-887a-51f637f4af2b","Prediction of slow drift oscillations of a moored ship in head seas","Kim, C.H.; Breslin, J.P.","","1976","","hydrodynamics","","conference paper","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:9691a533-8882-4afc-9396-31dc117f04ee","http://resolver.tudelft.nl/uuid:9691a533-8882-4afc-9396-31dc117f04ee","Prediction of drifting force and moment on an ocean platform floating in oblique waves","Kim, Cheung Hun","","1973","","hydrodynamics","","journal article","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:521f80f2-be94-4c06-b714-c36dc7432f55","http://resolver.tudelft.nl/uuid:521f80f2-be94-4c06-b714-c36dc7432f55","The hydrodynamic interaction between two cylindrical bodies floating in beam seas","Kim, Cheung Hun","","1972","","hydrodynamics","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:9e9d85c8-e285-43c6-9b14-fbee973615e1","http://resolver.tudelft.nl/uuid:9e9d85c8-e285-43c6-9b14-fbee973615e1","Hydrodynamic characteristics of prismatic barges","Kim, Cheung Hun","","1971","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:e88e4650-5493-42e5-aa6b-01e98642acde","http://resolver.tudelft.nl/uuid:e88e4650-5493-42e5-aa6b-01e98642acde","Wave exciting forces and moments on an ocean platform","Kim, Cheung Hun","","1970","","offshore","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:4be864c7-7866-4bd1-aa62-442b2ca45ed8","http://resolver.tudelft.nl/uuid:4be864c7-7866-4bd1-aa62-442b2ca45ed8","Numerical simulation of the linear and second-order surface flows around circular cylinders in random waves","Kim, Yong-Hwan","","","","hydrodynamics","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:e94cc416-c3a8-4d57-acab-a722e18165cf","http://resolver.tudelft.nl/uuid:e94cc416-c3a8-4d57-acab-a722e18165cf","The computation of the second-order hydrodynamic forces on a slender ship in waves","Kim, Yong-Hwan","","","","hydrodynamics","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:41cf070d-44fc-46e0-883d-913dbc861b96","http://resolver.tudelft.nl/uuid:41cf070d-44fc-46e0-883d-913dbc861b96","Numerical simulation of sloshing flows with impact load","Kim, Yong-Hwan","","","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:7fe8d7a5-8e4a-4637-acd4-f56efc953e8a","http://resolver.tudelft.nl/uuid:7fe8d7a5-8e4a-4637-acd4-f56efc953e8a","Drag measurements of flat plates with uniform injection of polymer solutions and their direct application to the wall","Kim, Sungchan","","1970","","hydrodynamics","","conference paper","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:815488dd-e762-490c-92f6-63d2b298001b","http://resolver.tudelft.nl/uuid:815488dd-e762-490c-92f6-63d2b298001b","A fundamental study of the current density distribution of a flowing nonequilibrium plasma","Kim, C.S.","","1969","","","en","report","University of Toronto","","","","","","","","","","","","",""
"uuid:07308d14-fb22-4af1-bac4-d509ace32d0b","http://resolver.tudelft.nl/uuid:07308d14-fb22-4af1-bac4-d509ace32d0b","The influence of water depth on the heaving, swaying and rolling motions and the bending moments of ships in regular waves","Kim, Cheung Hun","","1969","","hydrodynamics","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:f6f4d500-e2ad-4d57-9c58-7d2416a6dab8","http://resolver.tudelft.nl/uuid:f6f4d500-e2ad-4d57-9c58-7d2416a6dab8","Added mass for both vertical and horizontal vibration of two dimensional cylinders of curvilinear element sections with chines in a free surface","Kim, Keuck Chun","","1969","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:aa9cd577-8316-4e11-86aa-573e8b367138","http://resolver.tudelft.nl/uuid:aa9cd577-8316-4e11-86aa-573e8b367138","The influence of water depth on the midship bending moments of a ship moving in longitudinal regular head waves","Kim, Cheung Hun","","1968","","hydrodynamics","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:f6be561c-b5d1-4de5-aea6-bd02c79c7ae4","http://resolver.tudelft.nl/uuid:f6be561c-b5d1-4de5-aea6-bd02c79c7ae4","The influence of water depth on the heaving and pitching motions of a ship moving in longitudinal regular head waves","Kim, Cheung Hun","","1968","","hydrodynamics","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:03a3a19d-8be8-4cc6-bc62-bdb229fb0da7","http://resolver.tudelft.nl/uuid:03a3a19d-8be8-4cc6-bc62-bdb229fb0da7","Hydrodynamic forces and moments for heaving, swaying and rolling cylinders on water of finite depth","Kim, Cheung Hun","","1968","","hydrodynamics","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:b89c47c6-e81b-4032-88e3-7a052862c72a","http://resolver.tudelft.nl/uuid:b89c47c6-e81b-4032-88e3-7a052862c72a","Vertical exciting forces on a restrained cylinder from waves in shallow water","Kim, Cheung Hun","","1967","","hydrodynamics","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:ec230925-77d9-44f5-bc18-b4db89383c37","http://resolver.tudelft.nl/uuid:ec230925-77d9-44f5-bc18-b4db89383c37","Über den einfluss nichtlinearer effekte auf hydrodynamische kräfte bei erzwungenen tauchbewegungen prismatischer körper","Kim, Cheung Hun","","1967","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:5a54b0d9-4a4d-4f23-b486-969e10eb546b","http://resolver.tudelft.nl/uuid:5a54b0d9-4a4d-4f23-b486-969e10eb546b","Calculation of hydrodyanmic forces for cylinders oscillating in shallow water","Kim, Cheung Hun","","1967","","hydrodynamics","","report","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:049bbacb-7875-4538-87da-93b4bccf75b8","http://resolver.tudelft.nl/uuid:049bbacb-7875-4538-87da-93b4bccf75b8","On the harmonic oscillations of a rigid body on a free surface","Kim, Wook D.","","1965","","hydrodynamics","","journal article","","","","","","","","","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:8c626402-9429-4886-af23-bc867d026b2c","http://resolver.tudelft.nl/uuid:8c626402-9429-4886-af23-bc867d026b2c","The forced oscillation of shallow draft ships","Kim, Wook D.","","1962","","hydrodynamics","","report","","","","","","","","indefinite","Mechanical, Maritime and Materials Engineering","Marine and Transport Technology","Ship Hydromechanics and Structures","","",""
"uuid:b86f7efc-7d87-4863-bebc-0a8b86032af2","http://resolver.tudelft.nl/uuid:b86f7efc-7d87-4863-bebc-0a8b86032af2","Engineering flow diagram of the production of polyamide from adipic acid with hexamethylenediamine","Kim, J.C.","","1958","Document(en) uit de collectie Chemische Procestechnologie","","en","report","Delft University of Technology","","","","","","","","Applied Sciences","DelftChemTech","","","",""