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- Kumar, Vimal (author), Atta, Arnab (author), Pant, Kamal K. (author), Stankiewicz, A.I. (author) contribution to periodical 2022
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Voss, Jendrik (author), Martin, R.P. (author), Sander, Oliver (author), Kumar, Siddhant (author), Kochmann, Dennis M. (author), Neff, Patrizio (author)Deciding whether a given function is quasiconvex is generally a difficult task. Here, we discuss a number of numerical approaches that can be used in the search for a counterexample to the quasiconvexity of a given function W. We will demonstrate these methods using the planar isotropic rank-one convex function Wmagic+(F)=λmaxλmin-logλmaxλmin...journal article 2022
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Li, Meng (author), Chen, Yifei (author), Kumar, Neeraj (author), Lal, C. (author), Conti, M. (author), Alazab, Mamoun (author)Current connected and autonomous vehicles will contribute to various and green vehicular services. However, sharing personal data with untrustworthy Navigation Service Providers (NSPs) raises serious location concerns. To address this issue, many Location Privacy-Preserving Mechanisms (LPPMs) have been proposed. In addition, several...journal article 2022
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Singh, Diwakar (author), Sharma, S. (author), Kumar, Rajeev (author), Vaish, Rahul (author)A model for numerical homogenization of triply periodic minimal surfaces (TPMS) based on electrostrictive composites is presented. This electrostrictive composite consists of TPMS (a three-dimensional continuous structure) implanted in a soft non-electrostrictive matrix. A representative volume element (RVE)-based approach is used to...journal article 2022
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Lips, Esther H. (author), Kumar, Tapsi (author), Megalios, Anargyros (author), Visser, Lindy L. (author), Sheinman, Michael (author), Fortunato, Angelo (author), Shah, Vandna (author), Hoogstraat, Marlous (author), Wessels, L.F.A. (author)Ductal carcinoma in situ (DCIS) is the most common form of preinvasive breast cancer and, despite treatment, a small fraction (5–10%) of DCIS patients develop subsequent invasive disease. A fundamental biologic question is whether the invasive disease arises from tumor cells in the initial DCIS or represents new unrelated disease. To address...journal article 2022
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Kumar, Sowmya (author)The coalescence of two droplets suspended in a viscous fluid is the focus of this study. When two droplets that are suspended in a shearing flow come in contact with each other, it is currently uncertain if the contact would result in coalescence. To be able to make such predictions, it is necessary to study the effects of the system parameters,...master thesis 2021
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Kumar, Neel (author)In this thesis work, we strive to describe and apply the modelling methodology for simulating a turbulent jet diffusion flame stabilized behind a bluff body by applying flamelet generated manifold (FGM) model and steady diffusion flamelet model for predicting the pollutant emissions from the flame. The flame under consideration is a CH4/H2 (1:1)...master thesis 2021
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de Jong, Michiel (author), Triantafyllou, Giorgos (author), Spinoza Andreo, Guilherme (author), Dardavesis, Ioannis (author), Kumar, Pratyush (author), Maundri Prihanggo, Maundri (author)Indoor localisation methods are an essential part for the management of COVID-19 restrictions, social distancing, and the flow of people in the indoor environment. Moving towards an open work space in this scenario requires effective real-time localisation services and tools, along with a comprehensive understanding of the 3D indoor space. This...student report 2021
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Andreo, Guilherme Spinoza (author), Dardavesis, Ioannis (author), Jong, Michiel de (author), Kumar, Pratyush (author), Prihanggo, Maundri (author), Triantafyllou, Georgios (author), van der Vaart, C.G. (author), Verbree, E. (author)Indoor localisation methods are an essential part for the management of COVID-19 restrictions, social distancing, and the flow of people in the indoor environment. Moving towards an open work space in this scenario requires effective real-time localisation services and tools, along with a comprehensive understanding of the 3D indoor space. This...conference paper 2021
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Ledoux, H. (author), Biljecki, Filip (author), Dukai, B. (author), Kumar, Kavisha (author), Peters, R.Y. (author), Stoter, J.E. (author), Commandeur, T.J.F. (author)Three-dimensional city models are essential to assess the impact that environmental factors will have on citizens, because they are the input to several simulation and prediction software. Examples of such environmental factors are noise (Stoter et al., 2008), wind (Garcı́a-Sánchez et al., 2014), air pollution (Ujang et al., 2013), and...journal article 2021
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Ghosh, D. (author), Kumar, S. (author), Donselaar, M.E. (author), Corroto, C. (author), Ghosh, A.K. (author)The Ganges Delta is a key area where elemental contamination of groundwater constitutes a human catastrophe. The delta plain geomorphology comprises a large number of abandoned meander bends or oxbow lakes (Donselaar et al., 2017; Ghosh et al., 2021) characterized by an anoxic environment in the lower part of the lake water column (hypolimnion)....abstract 2021
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Flaschel, Moritz (author), Kumar, Siddhant (author), De Lorenzis, Laura (author)We propose a new approach for data-driven automated discovery of isotropic hyperelastic constitutive laws. The approach is unsupervised, i.e., it requires no stress data but only displacement and global force data, which are realistically available through mechanical testing and digital image correlation techniques; it delivers interpretable...journal article 2021
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Zheng, Li (author), Kumar, Siddhant (author), Kochmann, Dennis M. (author)We present a two-scale topology optimization framework for the design of macroscopic bodies with an optimized elastic response, which is achieved by means of a spatially-variant cellular architecture on the microscale. The chosen spinodoid topology for the cellular network on the microscale (which is inspired by natural microstructures...journal article 2021
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Hosseini, Mehdi (author), McNairn, Heather (author), Mitchell, Scott (author), Robertson, Laura Dingle (author), Davidson, Andrew (author), Ahmadian, Nima (author), Bhattacharya, Avik (author), Borg, Erik (author), Kumar, V. (author)The water cloud model (WCM) can be inverted to estimate leaf area index (LAI) using the intensity of backscatter from synthetic aperture radar (SAR) sensors. Published studies have demonstrated that the WCM can accurately estimate LAI if the model is effectively calibrated. However, calibration of this model requires access to field measures...journal article 2021
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Wei, L. (author), Grénman, Henrik (author), Haije, W.G. (author), Kumar, Narendra (author), Aho, Atte (author), Eränen, Kari (author), Wei, L. (author), de Jong, W. (author)Sub-nanometer zeolite 13X-supported Ni-ceria catalysts were synthesized for CO<sub>2</sub> methanation. XRD and SEM results show the structure and morphology of 13X zeolite after impregnation and calcination. Ce loading affected the catalysts’ metal dispersion, reducibility, basicity and acidity, and thence their activity and selectivity....journal article 2021
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Kumar, Arun (author), Ali, Mohammad (author), Kumar, Ranjit (author), Kumar, Mukesh (author), Sagar, Prity (author), Rani, Rita (author), Kumar, S. (author), Kumar, Dhruv (author), Ghosh, Ashok Kumar (author)Reportedly, 300 million people worldwide are affected by the consumption of arsenic contaminated groundwater. India prominently figures amongst them and the state of Bihar has shown an upsurge in cases affected by arsenic poisoning. Escalated arsenic content in blood, leaves 1 in every 100 human being highly vulnerable to being affected by...journal article 2021
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Haque, Mohammad T. (author), Will, Marco (author), Tomi, Matti (author), Pandey, Preeti (author), Kumar, Manohar (author), Schmidt, F.E. (author), Watanabe, Kenji (author), Taniguchi, Takashi (author), Steele, G.A. (author)We have studied 1/f noise in critical current I<sub>c</sub> in h-BN encapsulated monolayer graphene contacted by NbTiN electrodes. The sample is close to diffusive limit and the switching supercurrent with hysteresis at Dirac point amounts to ≃ 5 nA. The low frequency noise in the superconducting state is measured by tracking the variation in...journal article 2021
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Beran, Daniel (author), Jedlička, Karel (author), Kumar, Kavisha (author), Popelka, Stanislav (author), Stoter, J.E. (author)3D cartographic visualization of a continuous time-dependent phenomenon is not an easy task. The focus of this research is motivated by the struggle to visualize such a phenomenon. Based on the current state of the art, we implemented new visualization methods to visualize continuous time-dependent phenomena. All visualizations are based on...journal article 2021
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Fu, J. (author), Davis, T. P. (author), Kumar, A. (author), Richardson, I.M. (author), Hermans, M.J.M. (author)Oxide dispersion strengthened (ODS) steels are leading candidates for structural materials in nuclear fission and fusion power plants. Understanding the nature of nano-oxide particles in ODS steels is vital for a better control of the microstructure and mechanical properties to further their applications. In this study, electron microscopy...journal article 2021
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Kumar, Prashant (author), Debele, Sisay E. (author), Sahani, Jeetendra (author), Rawat, Nidhi (author), Marti-Cardona, Belen (author), Alfieri, S.M. (author), Basu, Bidroha (author), Basu, Arunima Sarkar (author), Menenti, M. (author)To bring to fruition the capability of nature-based solutions (NBS) in mitigating hydro-meteorological risks (HMRs) and facilitate their widespread uptake require a consolidated knowledge-base related to their monitoring methods, efficiency, functioning and the ecosystem services they provide. We attempt to fill this knowledge gap by...review 2021