"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:f22e9a89-5cee-4d7d-be1d-d818de2b7d73","http://resolver.tudelft.nl/uuid:f22e9a89-5cee-4d7d-be1d-d818de2b7d73","Promoting well-being among adolescents: Exploring the added value of a systemic design approach","Vos, Kirsten (TU Delft Industrial Design Engineering)","van der Bijl-Brouwer, M. (mentor); Huisman, G. (graduation committee); van der Wal, Koen (graduation committee); Delft University of Technology (degree granting institution)","2024","75% of all mental health issues arise between the ages of 14 and 25 (Kessler et al., 2005). Suicide is the number one cause of death among young people (Centraal Bureau voor de Statistiek, 2023), one in three adolescents experiences performance pressure (Kleinjan et al., 2020), one in seven adolescents has depressive symptoms (Kleinjan et al., 2020) and life satisfaction has decreased significantly over the past 20 years (Kleinjan et al., 2020). All of these statistics show one thing: a lot of adolescents have poor mental health and they seek more professional help because of it. However, youth care cannot handle this increased demand. This combination leads to problems and therefore a new approach is needed. In my project, I used a systemic design approach and focused on promoting well-being instead of only fixing mental health issues. Accordingly, the main research question in my project is:
“How can the systemic design approach contribute to improving well-being among adolescents (ages 16-18)?”
I used a systemic design approach to look at the larger system around adolescents to find new opportunities for possible interventions. I interviewed a lot of different stakeholders and explored their perspectives and their interactions with other stakeholders. I processed these insights into a giga-map, which helped me formulate three themes and eventually choose one theme: ‘Who is responsible’. This theme deals with a social norm where parents are held responsible for the upbringing and well-being of their children, whereas adolescents at this age distance themselves from their parents and need other adult support figures (McElhaney et al., 2009). In addition, the support adolescents receive in this system depends on individual motivation: some people recognize their role, others do not. From this theme and all the insights from the stakeholder sessions, I formulated a future vision which is represented by this African proverb:
“It takes a village to raise a child”
The shift needed to achieve this future is from scattered islands to a connected proverbial village. To achieve this, I chose teachers' mental models as a leverage point (Meadows, 1999). By showing teachers the value of their role, the value of promoting well-being and the value of connections, I hope they will also change their behaviour. From that goal, I designed my intervention OmDraaien, where three teachers are each given a role: a teacher, a parent and an adolescent. They play an interactive game in which they play a scenario and interact with ropes (connection pieces) that represent their relationships. After this interactive game, the participants reflect on the game they just played and relate it to their own work.
To shortly answer my research question, a systemic design approach has helped me to look at the broader system around adolescents and has therefore helped to create not only stakeholder value, but also potential systemic value. In addition, a systemic design approach has allowed me to discover an underlying problem: stakeholders focus just on symptomatic solutions rather than also on fundamental solutions.","Well-being; Adolescents; Systemic design","en","master thesis","","","","","","","","","","","","Design for Interaction","",""
"uuid:af394bc5-ef58-4758-9aa9-73752be688aa","http://resolver.tudelft.nl/uuid:af394bc5-ef58-4758-9aa9-73752be688aa","Preventing haul truck-related fatalities in open pit mining using gamified training simulation","Vos, Lennart (TU Delft Civil Engineering & Geosciences; TU Delft Resource Engineering)","Soleymani Shishvan, M. (mentor); Buxton, M.W.N. (graduation committee); Rinne, Mikael (mentor); Lottermoser, Bernd (mentor); Delft University of Technology (degree granting institution); Aalto University (degree granting institution); Rheinisch-Westfälische Technische Hochschule (degree granting institution)","2023","Haul truck driving remains to be the most dangerous occupation in the mining industry (Kecojevic et al., 2007), leading in fatalities over other occupations in the mining industry. As the transition to autonomous haul trucks over the coming decades will not address thisproblem today, an immediate solution is needed that can be adopted at short notice to help aid in minimizing haul truck accidents. A gamified training simulator was developed that teaches haul truck drivers how to handle the hazardous situations that lead to the most injuries in the mine environment. The simulated nature of the training method allows truck drivers to gain knowledge on hazardous situations and immediately put them into practice by applying the gained knowledge during the different levels. Gamification aspects like a score system and progression through levels were added to increase engagement during the training simulation.
A statistical analysis was made on haul truck accidents from 1983 until 2022. The accidents that proved to be most relevant were included in the content of the training software. A training software was developed using Unreal Engine 5, where trucks could be driven using a Thrustmaster T150 Pro steering wheel and driving pedals. 18 participants from ages 19-65 underwent the training program and two tests of identical difficulty were taken before and after undergoing the training, in order to make a judgement on the progress of the participants by undergoing the training simulation. Participants were judged based on the number of crashes and traffic violations committed, attempts required to complete the test, as well as the time taken to finish the test. A score was calculated based on these factors providing an overall judgement of the participants’ level of skill.
Average skill of participants increased by undergoing the gamified training, and training showed particularly good progress for underperformers in the initial test. After completing the gamified training the average score of participants was notably higher and the standard deviation was notably lower. It was concluded that all participants were brought to a comparably high level after completing the training.
The aim of this thesis is to develop an ecological model for fish habitat suitability in the river Rotte basin in the Netherlands that can be used in policy development for ecological restoration. The model serves as a decision support system to explain differences in fish population and evaluate the impact of management actions to modify fish habitat suitability. The river Rotte suits perfectly for this case study, because recently a fish passage has been realised between the Rotte and Nieuwe Maas to facilitate fish migration and expand living conditions. Furthermore, the river Rotte is a designated WFD water body, but the current status of the river varies between ""poor"" and ""moderate"" due to an unbalance between plant-loving and benthivorous fish species.
The model developed in this thesis is a Bayesian Belief Network model that predicts habitat factors for food preference and preference for habitat structure. The model is based on machine learning with a set of cases from monitoring data and predicts the probability distribution for fish habitat suitability for plant-loving and benthivorous fish species. The model has been applied to assess the impact of local conditions on fish habitat differentiation and to evaluate the impact of management actions on fish habitat suitability. The research shows that the Bayesian Belief Network model is very useable for policy making and facilitates the participation of various stakeholders. However, the current version of the model shows inadequate prediction accuracy and relies heavily on sampling data. This can be improved by expanding the scope of the model to include other water bodies in the Netherlands and by using metamodels for specific model variables.
Overall, the Bayesian Belief Network model is functional and usable for policy making, but further improvements are needed to enhance its prediction accuracy. This can be achieved through expanding the model's scope, evaluating its performance, and including more habitat factors in the model structure.
of the ESC. It discusses the implementation of the DShot communication protocol on an STM32G431KBT6 microcontroller. Also, the microcontroller senses phase currents and phase voltages from a BLDC motor and has to provide all the necessary information and processing resources for a control algorithm to be implemented. A PCB is designed to break out all the required interfaces of the microcontroller. Lastly, temperature management is implemented to prevent overheating of the inverter hardware by means of throttling. The DShot implementation has full bidirectional functionality with 3.4% package corruption. All sensor values are accurately provided to the control algorithm, and temperature and speed information are provided as DShot telemetry. Due to time constraints and lack of integration with the control algorithm, the behavior during anomalies such as power interrupts is not yet thoroughly tested.","ESC; BLDC motor; three-phase; STM32; PCB Design","en","bachelor thesis","","","","","","","","","","","","Electrical Engineering","",""
"uuid:7bda9c95-1aec-40fb-a585-1e0af8b743bb","http://resolver.tudelft.nl/uuid:7bda9c95-1aec-40fb-a585-1e0af8b743bb","A whole-energy system perspective to floating wind turbines and airborne wind energy in The North Sea region","Vos, Hidde (TU Delft Electrical Engineering, Mathematics and Computer Science)","Pfenninger, Stefan (mentor); Schmehl, R. (graduation committee); Lombardi, F. (graduation committee); Delft University of Technology (degree granting institution)","2023","In light of the energy transition to a fossil-free energy system, Europe is experiencing a colossal shift toward renewable energy generation. To facilitate the rapidly growing demand for clean energy, new technologies, and resources are being investigated. Airborne wind energy (AWE) and floating wind turbines have the potential to unlock untapped wind resource potential and contribute to the balancing of the system in unique ways. So far, the techno-economic potential of both technologies has only been investigated at small scale, while the most significant benefits will likely play out on a system scale. Demonstrating the economic feasibility and additional benefits of emerging technologies in an energy system context is vital to accelerate political traction and funding.
This research aimed to find the main system-level trade-offs involved with integrating AWE and floating wind turbines in a highly-renewable future energy system. To do so, a modelling workflow was developed that consists of future costs and performance estimation, wind resource assessment and integration into a high-resolution large-scale energy system cost-optimization model, based on the Calliope modelling framework. The investigated region contains 10 countries in the North Sea region. The wind resource and system balancing are hourly-resolved. Key findings include:
Onshore AWE significantly outperforms onshore wind turbines due to higher wind resource availability.
The main limiting factor in large-scale onshore AWE deployment is the spatial energy density.
Offshore AWE shows highly identical performance compared to offshore wind alternatives.
Deployment of offshore AWE is mainly cost driven.
Floating wind turbines demonstrate great potential because of the high capacity factors that can be achieved in high wind resource areas where conventional offshore wind is not technically feasible.
Offshore wind potential in general strongly depends on available onshore technical potential.
The outcomes show significant potential for both emerging technologies that could be realized in the near future. This study provides first exploratory findings that lay the foundation for future studies in the context of this research topic. Multiple directions for follow-up research have been identified to quantify this potential in more detail.","Airborne wind energy; Floating Wind Turbines; Energy system modeling","en","master thesis","","","","","","","","","","","","Electrical Engineering | Sustainable Energy Technology","Sustainable Energy Technology",""
"uuid:7eed10aa-edac-409a-8b24-97308c4c6294","http://resolver.tudelft.nl/uuid:7eed10aa-edac-409a-8b24-97308c4c6294","Impact of an evolving transport system on the development of European cities: Lille case study: A reciprocal evolution of a node and a place","Vos, Ruben (TU Delft Architecture and the Built Environment)","Oxenaar, A.J. (mentor); Delft University of Technology (degree granting institution)","2023","This architectural history thesis looks at the interrelationship between transport, land-use and architecture. A systematic comparison of the these three systems at key time periods contributed to the collective puzzle of answering the main research question; ‘How has the evolution of the transport system, with main focus on the railway system, impacted the development of the city Lille throughout time?’.
The transport systems of major European cities have played a vital role in their economic and urban development, forming networks that facilitate the flow of energy, people, and goods. Lille, located near the French-Belgian border, has two stations from different railway eras: Lille-Flandres (since 1846) and Lille-Europe (since 1990). The transformation of these stations has been driven by capacity demands and the need to adapt to rapid growth and limited space. Lille-Europe, in particular, has acted as a catalyst for the city’s economic transformation from a secondary to a tertiary sector.
The architecture of the station areas reflects the interplay between local and global contexts, with Lille-Flandres embodying a fusion of Flemish, French, and Parisian styles, while Lille-Europe represents a modern and cross-border vision. This architectural evolution sparks a debate between preserving local identity and embracing universal design principles. The station areas serve as a visual expression of Lille’s dynamic evolution and the changing nature of transportation systems.","Euralille; Railway; Land-use; Node; Place","en","student report","","","","","","","","","","","","Architecture, Urbanism and Building Sciences","AR2A011",""
"uuid:a808976d-31a5-40a1-bd14-e978f6e414ff","http://resolver.tudelft.nl/uuid:a808976d-31a5-40a1-bd14-e978f6e414ff","Optimising OR planning: Sequencing surgery groups while levelling bed occupancy","Vos, Kelly (TU Delft Electrical Engineering, Mathematics and Computer Science; TU Delft Discrete Mathematics and Optimization; Sophia Children’s Hospital)","van Essen, J.T. (mentor); van Iersel, L.J.J. (graduation committee); Staals, L.M. (graduation committee); Keijzer, M. (graduation committee); Delft University of Technology (degree granting institution)","2023","This research is conducted in collaboration with the Sophia Children's Hospital (SCH). The hospital wants to provide their patients with more detailed information about when a patient is approximately scheduled to have a surgery. The first step is to create a model which optimises the operation room (OR) schedule and indicates when different kinds of surgeries are planned. This information, combined with the waiting list, provides insight in when a surgery of a specific patient is scheduled.
In a hospital, different departments work together to treat the patient as good and efficient as possible. If a patient needs a surgery, not only an OR is needed, but also a bed at a ward which matches the patient's needs. The goal of this thesis is to use the different resources of the hospital as efficiently as possible. This is done by not only optimising the utilisation of the OR, but at the same time levelling the bed occupancy of the different wards. The levelling of the bed occupancy is done by minimising the maximum number of used beds at each ward. Because, if we minimise the maximum, we force that the patients are spread out more evenly over the day.
For each specialty, the patients are divided into patient groups based on historical data using a constrained $k$-means clustering algorithm. For each patient group, information is gathered about the length of stay (LoS) and the surgery duration of patients in this patient group. Next to that, the number of patients in a patient group indicates how often a patient group needs to be scheduled at least.
The probability distribution of the surgery duration is taken into account when deciding at which day, at what time, and in which OR a surgery is planned. A patient group can only be scheduled during OR shifts assigned to the corresponding specialty. At the same time, the levelling of the bed occupancy is taken into account.
After some constraints are linearised, this model can be formulated as a mixed integer linear program (MILP). However, the model has a large number of variables. Therefore, column generation is used to split the model into smaller subproblems per specialty. Some of the pricing subproblems take a lot of time to optimise. For that reason, we set some time limits both on the runtime of the pricing subproblems and the runtime of the entire algorithm. Column generation does not guarantee an optimal solution of our MILP. However, the objective value of our MILP improves over time, when new columns are added to the set of available columns. This indicates that column generation can be used to optimise our model.
In this thesis, several versions of the model are presented. For example, the schedule is different if the bed occupancy is calculated every hour or of every fifteen minutes. Next to that, the model can either be more focussed on maximising the OR utilisation or on levelling the bed occupancy.","Optimisation; Optimisation in healthcare; Column Generation; OR planning","en","master thesis","","","","","","","","","","","","Applied Mathematics","",""
"uuid:1643a46b-e458-4798-97e2-141a6f139424","http://resolver.tudelft.nl/uuid:1643a46b-e458-4798-97e2-141a6f139424","COMPLEX: a cathedral for living in","Vos, Berend (TU Delft Architecture and the Built Environment)","van de Pas, R.R.J. (mentor); Nourian, Pirouz (mentor); Tomesen, P.L. (mentor); Delft University of Technology (degree granting institution)","2023","COMPLEX is an alternative to contemporary 2.5d-housing where typologies are generic and flat. Every home in this building is unique and is aggregated and puzzled together using a created computer algorithm. A vaulted structural system creates structural freedom and helps define spaces.","Typology puzzle; Housing; Algorithmic design; Funicular structure, Vaulted hexagonal ceilings","en","master thesis","","","","","","","","","","","","Architecture, Urbanism and Building Sciences","",""
"uuid:15e23019-5218-4581-9002-e35728d4ef5e","http://resolver.tudelft.nl/uuid:15e23019-5218-4581-9002-e35728d4ef5e","THE FUTURE BANK: a new public figure","Vos, Bart (TU Delft Architecture and the Built Environment)","Pimlott, Mark (mentor); Zeinstra, J.S. (graduation committee); Klooster, M.W. (graduation committee); Delft University of Technology (degree granting institution)","2022","This graduation project is focusing on and looking for the function and role of the future national bank, as an outcome of its current physical and social situation. The site of the project is the National Bank of Belgium, located in Brussels.
For its program, the bank has a public function and a reception hall, but mainly consist of office spaces and meeting rooms within a, with security line protected, area. The traditional program, like pressing and storing money, is already replaced to new buildings outside of the city center for better efficiency and land use. Next to that, the public and office program is losing its role due to digitalization. Organisational and programmatic changes are already made, but the architecture is still in its former state. Therefore, it is important to seek for new possibilities, and looking to the future role and image of the bank, whilst learning of the history of the Bank and its site.","brussels; office; bank; public building","en","master thesis","","","","","","","","","","","","Architecture, Urbanism and Building Sciences | Interiors Buildings Cities","","50.848917, 4.359806"
"uuid:56117801-47e6-4c91-9d55-e7db6046a8ba","http://resolver.tudelft.nl/uuid:56117801-47e6-4c91-9d55-e7db6046a8ba","Light Based Activity Recognition Using Realistic Data","Vos, Jasper (TU Delft Electrical Engineering, Mathematics and Computer Science)","Zuniga, Marco (mentor); Zaidman, A.E. (graduation committee); Chavez Tapia, M.A. (graduation committee); Delft University of Technology (degree granting institution)","2022","In the field of Visible Light Sensing, light sensors are used to extract information from objects which do not actively communicate any information. Previous research within this field proposed the system called SolAR, and proved the possibility of using a solar cell as both a power source and an activity sensor. A wrist mounted solar cell generates more energy than it uses during operation, while achieving a high classification accuracy for different activities. While the wearer performs different activities, the power output of the solar cell fluctuates. In turn, these fluctuations are used to recognise activities. To extend on the concept of SolAR, this paper introduces a prototype to obtain data from different activities while performing day-to-day tasks. During these activities, ordinary actions are performed to emulate natural circumstances. Analysis of this data initially shows no significant drop in accuracy when compared to SolAR. Further examination shows significant differences in mislabelling rates when comparing to the results of SolAR.","VLS; Human Activity Recognition; solar power","en","bachelor thesis","","","","","","","","","","","","Computer Science and Engineering","CSE3000 Research Project",""
"uuid:908114ee-b57d-4f7e-869c-7c057a58326e","http://resolver.tudelft.nl/uuid:908114ee-b57d-4f7e-869c-7c057a58326e","Gate Set Tomography for Nitrogen-Vacancy Systems","Vos, David (TU Delft Electrical Engineering, Mathematics and Computer Science; TU Delft QID/Borregaard Group)","Borregaard, J. (mentor); Zaidman, A.E. (graduation committee); Delft University of Technology (degree granting institution)","2022","Quantum computing is an emerging field with many promising future applications.
These include, but are not limited to, quantum machine learning, quantum cryptography and quantum chemical engineering.
Before these can be realised, obstacles, which arise due to scaling, need to be overcome.
To accomplish this, quantum processors must be built with low noise and high target gate fidelity rates.
By characterising quantum systems, possible sources of noise can be identified, and consequently, systems can be designed which effectively suppress noise.
Gate Set Tomography (GST) is a protocol developed for the characterisation of quantum processors.
In this research, we apply GST to nitrogen-vacancy (NV) centre systems.
We also construct a widget meant to visualise GST results in an intuitive manner.
Our research is based on twelve models, varying in the number of gates used, the initial state of the nitrogen nucleus, and whether an XY4 echo was applied after gates.
We use simulated and experimental models, and analyse these using the error generator, diamond norm and Nσ metrics.
We conclude that our simulated models capture sources of noise, as the proportion of stochastic errors shifts to Hamiltonian errors when we change our target model from the ideal model to the simulated ones.
We also conclude that the XY4 echo significantly reduces non-Markovianity, which arises due to coupling.
Furthermore, evidence which points to calibration faults is discovered within certain models.
Finally, we present the visualisation widget and show how it can be used to interpret results.","NV systems; system characterisation; quantum computing; gate set tomography","en","bachelor thesis","","","","","","","","","","","","Computer Science and Engineering","CSE3000 Research Project",""
"uuid:41d7e05b-8c68-400b-96cd-6261fbbe6e1e","http://resolver.tudelft.nl/uuid:41d7e05b-8c68-400b-96cd-6261fbbe6e1e","API evolution on Maven Central: do developers adhere to semantic versioning?","Vos, Simcha (TU Delft Electrical Engineering, Mathematics and Computer Science)","Keshani, M. (mentor); Proksch, S. (mentor); Gerritsen, B.H.M. (graduation committee); Delft University of Technology (degree granting institution)","2022","In this paper, we investigate whether developers of artifacts on Maven Central adhere to semantic versioning. We also investigate whether there is a link between violations in semantic versioning and the popularity of the violating method. Developers can violate semantic versioning by removing or altering methods in their API, which we refer to as breaking changes. They can also violate semantic versioning by extending the API in a patch version, referred to as an illegal API extension. APIs that do not keep their promise of adhering to semantic versioning, will unexpectedly break their dependents during upgrading of dependencies.
We have found that these two types of violations do occur in practice. We find that 24% of analyzed artifacts contain breaking changes and 24% of artifacts contain illegal API extensions. Finally, we show that popularity of a method does not have an impact on breaking changes.
We conclude that semantic versioning can not always guarantee that upgrading dependencies will not lead to incompatibility. This indicates a need for developers to be more aware of the impact that violating semantic versioning has.","Maven Central; compatibility; semantic versioning; API evolution; breaking changes","en","bachelor thesis","","","","","","","","","","","","Computer Science and Engineering","CSE3000 Research Project",""
"uuid:52236834-c269-48c1-90eb-16b9fc74ac60","http://resolver.tudelft.nl/uuid:52236834-c269-48c1-90eb-16b9fc74ac60","Temperature dependence of a phytoplankton population in a 2D model of a coastal area","Vos, Barber (TU Delft Applied Sciences; TU Delft Electrical Engineering, Mathematics and Computer Science)","Dijkstra, Y.M. (mentor); Kleijn, C.R. (mentor); den Ouden-van der Horst, D. (graduation committee); Vermaas, D.A. (graduation committee); Delft University of Technology (degree granting institution)","2022","Due to climate change, the sea temperature is rising. This temperature change has an effect on the phytoplankton population. Phytoplankton is responsible for more than 50 percent of the oxygen production on earth, and is therefore crucial for life on earth. In this report, the research question is: is the temperature increase of the water important for the development in space and time of the plankton population in a 2D model of a coastal area of an ocean?
To investigate this, first a 2D model for a coastal area of an ocean is formed. As a basis for this model the 0D model of Steele and Henderson is used to describe the predator-prey model for zooplankton and phytoplankton. Due to this model a repeating pattern in time arises, which is called a limit cycle. This predator-prey
model is expanded to a 2D model by applying convection (v) and diffusion (D) to it, representing the current and dispersion in the water. The chosen parameters and boundary conditions are inspired by the coastal area of the west coast of Portugal.
To evaluate the effect of the water temperature rising, first, the effect of diffusion and convection are studied by answering the following questions: is the convection important for the development in space and time of the plankton population in a 2D model of a coastal area of an ocean? And: is the diffusion important for the development in space and time of the plankton population in a 2D model of a coastal area of an ocean?
The diffusion is dominant in the direction perpendicular to the coast. Due to the diffusion the limit cycle of the predator-prey model is suppressed. Its range gets smaller until the plankton population is completely constant for D > 2.5 m^2/s. This critical value is included in the realistic value of D, which varies from 1 to 2000 m^2/s.
Due to convection, the limit cycle corresponding to the boundary condition occurs in the direction parallel to the coast, making every point in the domain steady state. The higher the velocity v corresponding to the convection is, the less oscillations in phytoplankton density there are in the domain, thus the larger the wavelength of the oscillation is. For v > 0.06 m/s the current is so fast that the predator-prey model has little time to develop before it reaches the right boundary, making the left boundary value more important. This critical value is included in the realistic value of v, which varies from 0.03 to 0.28 m/s.
The model experiences both diffusion and convection more or less equally when the Péclet number vH^2/DL≈1, resulting in D/v≈50 m. If this number is significantly larger than 50 m, diffusion dominates the solution. If the number is significantly smaller than 50 m, convection dominates the solution.
Now the main research question can be answered. By increasing the temperature of the water the growth rate of phytoplankton increases. Due to this increase, the timescale of the predator-prey (τpp ) decreases. The value of D and v for which the predator-prey model and diffusion and convection all influence the solution
equally depends on the timescale with the factor 1/τpp . A smaller time scale means that the predator-prey model contributes more to the model. However, this change is very small in comparison to the scale of the realistic values. In conclusion, in the formed 2D model the temperature increase of the water is not important for the development of the plankton population in space and time.
The results of this report are influenced by the assumptions and approximations made. In this study, several processes, both physical and biological, are described with constants and simplifications. Improving the models of these processes is left for further research.","Plankton; Predator-prey; Transport Modelling; Temperature dependence","en","bachelor thesis","","","","","","","","","","","","Applied Mathematics | Applied Physics","",""
"uuid:89c225ab-8516-410a-ab5b-f6f2563e85ad","http://resolver.tudelft.nl/uuid:89c225ab-8516-410a-ab5b-f6f2563e85ad","Training human-AI agent in Overcooked","Vos, Jim (TU Delft Electrical Engineering, Mathematics and Computer Science)","Oliehoek, F.A. (graduation committee); Loftin, R.T. (mentor); Delft University of Technology (degree granting institution)","2022","Most cooperative games are tackled by creating a team of agents who are optimised for each other and the problem. Creating an agent who can play in a variety of teams without any foreknowledge of its partner is a different challenge. These AI systems could useful for human-AI interaction as different people bring a lot of variance into the system. The training method synchronous K-level reasoning best response (SyKLRBR) tries to tackle this problem by creating agents based on grounded information. This research tested the potential of SyKLRBR in human-AI research evaluating the performance of its agent in the cooperative game Overcooked. The agents were able to obtain consistent scores against several unseen strategies, suggesting that SyKLRBR is able to create robust agents. Where SyKLRBR shows potential for medium cooperative settings this paper also discusses its great weakness for highly cooperative problems.","SyKLRBR; Overcooked AI; Artifical Intelligence","en","bachelor thesis","","","","","","","","","","","","Computer Science and Engineering","CSE3000 Research Project",""
"uuid:fbfdf287-f0d1-40f4-9d44-5832b72ed05f","http://resolver.tudelft.nl/uuid:fbfdf287-f0d1-40f4-9d44-5832b72ed05f","Detecting irrigation of potato parcels in the Northern Netherlands using remotely sensed SAR images","Vos, Roel (TU Delft Electrical Engineering, Mathematics and Computer Science)","Heemink, A.W. (mentor); de Visser-Bleijenberg, Frederike (graduation committee); Söhl, J. (mentor); Delft University of Technology (degree granting institution)","2022","As a response to the dry summer of 2018, Witteveen+Bos developed a model for water demand prediction to improve insight into water demands. Validation by water board ""Hunze en Aas"" has revealed the predictive power of the irrigation model to be very limited. For this thesis project, we developed a methodology for the detection of irrigation of crop parcels based on the radar vegetation index (RVI) derived from remote SAR images. This methodology can be used to improve the existing irrigation model.
To achieve this, we developed a novel model to describe the evolution of a vegetation index (such as RVI) during the growth season. Unlike existing models, the model presented in this thesis includes the effect of precipitation deficit, both as a temporary inhibitor of a vegetation index, and as a long-term influence on the crop growth. The model is non-linear in many of its model parameters. Therefore, heuristic calibration methods are unavoidable. We show that the standard calibration methods non-linear least squares and differential evolution are outperformed by a hybrid of both methods that we specifically designed for this application.
After calibrating the model to time series of 1167 potato parcels in the north-east of the Netherlands, we investigate different ways to cluster the model parameters. We propose explanations for three important clusterings through their RVI time series (speculative) environmental factors. Comparison with information on irrigated parcels for the years 2018-2020 reveals a statistically significant correlation between some of the clusters and irrigation. However, the variation in irrigation rate never exceeded a factor two. Therefore, no accurate classifier can be built based on these clusters.
We recommend two important ways to improve the current implementation. Firstly, the baseline RVI is consistently overestimated, resulting in mostly negative normalized RVI. Because of this, the model cannot properly describe precipitation deficit-driven fluctuations in the RVI. These fluctuations are an important part of system behaviour, so improving the estimation of the baseline RVI should be the first priority for future research.
Secondly, the exact irrigation dates of a set of parcels will be very useful. Comparing these dates to the corresponding RVI time series will make it possible to uncover features of the RVI evolution that are indicators of irrigation. The model parameterization can then be tuned to optimize sensitivity to these features.","Vegetation index modelling; Irrigation; RVI; Plant growth; Crop monitoring","en","master thesis","","","","","","","","","","","","Applied Mathematics","",""
"uuid:43a1a266-8ba5-490f-bed4-c4fe33831343","http://resolver.tudelft.nl/uuid:43a1a266-8ba5-490f-bed4-c4fe33831343","SPEXone as an air quality monitoring system: Assessing the polarization detection of plumes","Vos, Jurrien (TU Delft Aerospace Engineering)","Naeije, M.C. (mentor); Oort, Marc (graduation committee); Dingjan, Jos (graduation committee); Delft University of Technology (degree granting institution)","2021","Aerosols, also known as particulate matter, are tiny particles or droplets suspended in the atmosphere which interact with solar radiation. These particles are partly responsible for cloud formation and are detected amongst others in (forest fire) smoke, dust, volcanic ash or sulfates. Aerosols have a large influence on the Earth’s climate as well as on air quality. Currently, SPEXone is one of the most promising instruments considering aerosol research due to the versatile nature of measurement methods based on multiple-angle polarization observations. Therefore, the SPEXone instrument will be implemented aboard the PACE satellite, designed primarily for aerosol observations for climate research of the Earth. The PACE satellite will be launched by NASA in 2025. The measurements of SPEXone provides highly relevant information on aerosol type for source apportionment. This raises the question whether SPEXone can serve as a stand-alone air quality monitoring system, thereby responding to the increasing awareness of the importance of monitoring air quality worldwide. Thus, this thesis focuses on the applicability of the SPEXone instrument regarding air quality monitoring by investigating plume polarization detection based on two relevant use cases. In this study, the plumes were simulated according to Gaussian plume behaviour in combination with a collection of observation scenarios. SPEXone measurements were simulated by using a radiative transfer model and instrument noise model to simulate the degree of linear polarization at the satellite sensor. This study found that for very optimistic emission rates, plume detection was possible for about 90 percent out of 144 measurements and between 79 and 67 percent out of 144 measurements at a wavelength of 670 nm. However, lowering the emission rate to realistic values showed that, apart from some very rare cases, no detection was possible. This leads to the conclusion that polarization signatures from the emitted aerosols in the simulated plumes are too weak in order to be detected above the polarization signature of the background. Nonetheless, due to the complexity of aerosol modelling, not all contributing factors were given the same level of detail, i.e. varying microphysical properties and the exact influence of the vertical height profile of the plume. Future research needs to focus on these aspects in order to yield a conclusive result of the applicability of the SPEXone instrument regarding air quality monitoring. Additionally, a different approach to characterize the background noise may increase the probability for plume detection.","","en","master thesis","","","","","","","","","","","","Aerospace Engineering","",""
"uuid:ef460078-74a9-47fa-b4a9-aacb1f2e8725","http://resolver.tudelft.nl/uuid:ef460078-74a9-47fa-b4a9-aacb1f2e8725","Low-Wind Turbines in the Dutch Power Grid: Understanding the Effect of Low-Wind Turbines on Storage Capacity and System Costs","Vos, Bas (TU Delft Electrical Engineering, Mathematics and Computer Science)","Zaaijer, M B (mentor); Delft University of Technology (degree granting institution)","2021","One of the major challenges that the world currently faces is the energy transition. The aim of most countries worldwide is to reduce their carbon footprint, in order to slow climate change. Fossil fuel powered energy generation is replaced with an increasing share of variable renewable energy sources such as wind and solar energy. Because of the inherent uncertainty and intermittency of these renewable power sources, large scale energy storage is considered inevitable in order to mitigate the mismatch between supply and demand. However, storage comes at a cost and uses precious materials, of which there might not be sufficient. Therefore, a whole range of solutions is being researched and implemented. Currently, it is not well-known what mix of which solutions will be the most technologically and economically effective. The Low-Wind turbine is a new turbine concept, specifically designed for low wind speed conditions, combined with a low rated and cut-out wind speed. The reduced normative loads on the blades enable a re-design of several components, which ultimately results in lower costs. This new turbine concept aims to be a system-friendly turbine, by decreasing the mismatch between production and demand and thereby reducing the total amount of storage or overplanting required in the system. This research assesses the effectiveness of the Low-Wind turbine in the Dutch energy grid, when it is predominantly powered by renewable energy sources. A power model, specifically developed for this research, simulates the power flows and optimises the seasonal storage required in order to meet the constraints. The power model is simulated for a range of installed turbines, consisting of combinations of conventional and Low-Wind turbines. This research also carries out a preliminary design off a Low-Wind turbine, based of a reference turbine, in order to determine its costs. The result of this study show that, if the cost of the installed wind farms dominate the costs, Low-Wind turbines does not provide a cost-effective solution to minimising system costs. However, the results also show that, in a situation where total costs are dominated by storage cost, the Low-Wind turbine can provide a cost-effective alternative to conventional turbines. The results also show that, for high overplanting factors, Low-Wind turbines and conventional turbines provide a similar effect on the reduction of system costs, but at lower costs.","Wind Turbine; Low-Wind Turbines; Cost analysis; Optimisation; Storage; Wind turbine design","en","master thesis","","","","","","","","","","","","Electrical Engineering | Sustainable Energy Technology","",""
"uuid:9df9371f-bd2d-4f0c-8f00-ba23194ce1eb","http://resolver.tudelft.nl/uuid:9df9371f-bd2d-4f0c-8f00-ba23194ce1eb","Minimally-Interactive Protocols for Privacy-Preserving Set and Multiset Operations Between Multiple Parties","Vos, Jelle (TU Delft Electrical Engineering, Mathematics and Computer Science)","Erkin, Z. (mentor); Picek, S. (graduation committee); Chen, Y. (graduation committee); Delft University of Technology (degree granting institution)","2021","In our increasingly digital society, we are making a growing amount of data available to computers, networks and third parties. As a consequence, our sensitive data is in danger of getting exposed. The field of multi-party computation attempts to mitigate this by studying protocols that enable parties to perform their operations digitally, without the risk of privacy-violating data leaks. Among those operations are multi-party private set and multiset operations. In such a scenario, multiple parties, each with their own input set or multiset, want to collectively find the result of an operation over their inputs, without revealing these original inputs. Such operations are the cornerstone of many complex privacy-preserving protocols. For example, a two-party private set intersection forms the key to several privacy-preserving contact tracing protocols.
While multi-party private set and multiset operations have been studied for almost two decades, these privacy-preserving alternatives are often impractical: one limitation is that, to the best of our knowledge, all known protocols require several interactions between the cooperating parties. This means that rather than simply submitting their input, each party must actively take part in the protocol. In this thesis, we propose the first non-interactive protocols for privately computing set and multiset operations between multiple parties,
which rely on two constructions for non-interactive secret sharing. In addition, for operations that cannot be trivially performed using our non-interactive primitives, we propose minimally-interactive alternatives that instead rely on a homomorphic cryptosystem over elliptic curves. By using elliptic curves, this cryptosystem is faster and requires less bandwidth than the commonly used cryptosystems over integers, while retaining the same level of security. We provide proof-of-concept implementations of exact and more efficient approximate protocols that take on the order of seconds to minutes to compute, depending on the number of parties and possible inputs. Finally, we give formal proofs for the security of these protocols, so as to offer practical and provably privacy-preserving alternatives to otherwise sensitive operations.","Privacy-Enhancing Technology; Set operations; Multiset operations; Private Set Intersection; Private Set Union; Multi-Party Computation; Non-interactive; Secret Sharing; Homomorphic Encryption; Elliptic Curve Cryptography","en","master thesis","","","","","","","","","","","","","",""
"uuid:dbf6d1c3-bbc5-43e3-8b3c-9e73cf7eda45","http://resolver.tudelft.nl/uuid:dbf6d1c3-bbc5-43e3-8b3c-9e73cf7eda45","Tidal control in the Lower Ems: An indicative study into the effects of controlled barrier operation on the tidal asymmetry in the Lower Ems river","Vos, Thomas (TU Delft Civil Engineering and Geosciences)","Aarninkhof, S.G.J. (graduation committee); Zitman, T.J. (mentor); van Maren, D.S. (graduation committee); Delft University of Technology (degree granting institution)","2021","The lower Ems river suffers from hyper-turbid conditions. These conditions are caused by channel deepening over the last 50 years, resulting in an asymmetrical tidal wave. This asymmetry has resulted in an increased
import of sediment into the Ems river. Recently some effort has gone into determining whether or not the local tidal barrier (Emssperrwerk) can be used to alter the asymmetry of the tidal waves propagating through the Ems estuary. Previous modelling studies, using state-of-the-art models, have been able to reproduce prototype tests involving the same tidal barrier but very little effort has thus far gone into determining what the optimal barrier control regime is and what the restriction imposed on the barrier operation mean for the overall
effectiveness of the barrier. The operation of the tidal barrier was schematised and described using two factors: closure percentage and closure duration. The effectiveness of a broad spectrum of combinations determining the tidal barrier operation is modelled using a simple one-dimensional model which takes only into account the (simplified) hydrodynamics in the lower Ems river. The results of the model indicate that only in part of the Lower Ems the tide can be adjusted to become symmetrical or slightly ebb-dominant. This requires a closure duration longer than approximately 240 minutes. The length of this stretch of river is increase further by increasing the closure percentage. Similarly, increasing the closure percentage also leads to a decrease in the tidal volume and the amplitude of the M4 component. For this reason, the closure percentage should be kept as low as possible, as long as the barrier operation is able to reduce the sediment import into the Lower Ems. The required length of the stretch of the Lower Ems with a symmetric tide is estimated to be around 12 km. Applying restrictions to the barrier operations showed that shorter barrier
operations should be preferred, since short operations allow a larger number of
tidal waves to be altered, increasing the effectiveness in a realistic setting. Based on these considerations an optimal barrier operation consists of a closure duration of approximately 300 minutes and a closure percentage of approximately 60%. The results showed that the method used for evaluating the barrier operation is unable to distinguish between water levels signals consisting of altered and unaltered waves. The effectiveness of the barrier operation is
still estimated by considering the whole water level signal. The impact of the barrier operation in the model interfered with the seaward model boundary. This error increases in magnitude with increasing closure percentages. Making the results for those combinations unreliable. In order to make more reliable conclusions about the effect of the tidal barrier operation, subsequent models should encompass a larger domain and include a more detailed schematisation of the channel geometry, river discharge and the tidal barrier itself.
currently based on rare metals such as platinum, osmium or ruthenium. The developmentof alternative catalysts made from more abundant metal such as manganese offers chances to increase sustainability and cost efficiency. Analysing and predicting chemical and physical properties with a computational would streamline the development process by allowing early elimination of options and by proposing new structures with a high chance of success. Density-functional theory (DFT) can predict structures and ligand properties at a high level. In this investigation, around 40 ligands were defined based on previously researched manganese compounds with known catalytic properties or previously investigated ruthenium complexes. Properties such as hydricity, CO frequencies and bond lengths were calculated and linked to known catalytic activity from the literature.No hard correlations between the investigated properties and reported catalytic activities have been found. Some links however do appear to exist such as a connection between high calculated hydricities and a higher reported catalytic activity.","Density Functional Theory; catalyis; computational; Manganese","en","bachelor thesis","","","","","","https://doi.org/10.4233/uuid:10.4121/14390453 Related dataset 4TU.ResearchData","","","","","","","Molecular Science & Technology",""
"uuid:e5da7c83-7e6c-43d2-80b6-7e9d9dd34706","http://resolver.tudelft.nl/uuid:e5da7c83-7e6c-43d2-80b6-7e9d9dd34706","The application of differentiable programming frameworks to computational fluid dynamics","Vos, Bart (TU Delft Electrical Engineering, Mathematics and Computer Science; TU Delft Delft Institute of Applied Mathematics)","Verlaan, M. (mentor); Nuttall, Jonathan (mentor); Budko, N.V. (graduation committee); Delft University of Technology (degree granting institution)","2021","In recent years many automatic differentiable programming frameworks have been developed in which numerical programs can be differentiated through automatic differentiation (AD). Examples of these frameworks are Theano, TensorFlow and Pytorch. These frameworks are widely used in Machine Learning. AD also finds applications in the field of computational fluid dynamics (CFD). It is used to develop discrete adjoint CFD code for research concerning for instance sensitivity analysis, data assimilation and design optimization. However, the use of the automatic differentiable programming frameworks in the field of CFD is limited. One can find some examples in the literature on how to find a numerical solution to an initial value problem using a differentiable programming framework. In this work it will be clarified how one can implement an semiimplicit
time integration scheme for a staggered grid to simulate the propagation of long waves in water with a free surface in TensorFlow. A main advantage of the automatic differentiable programming frameworks is the user friendly application
programming interface (API) for AD. No research has been conducted to use this API in the field of CFD. In this work an example will be given how one can use TensorFlow for research concerning sensitivity analysis. AD requires a significant allocation of memory on a CPU/GPU when working with fine meshes and/or long simulations and since CPU/GPU memory is finite, the method checkpointing is
proposed to make it feasible to perform sensitivity analysis when working with fine meshes and/or long simulations. Another main advantage of the differentiable programming framework TensorFlow is the use of compute unified device architecture (CUDA) of a NVIDIA GPU in order to perform computations in parallel, which results in a significant reduction in computation time. A Benchmark will be given that indicates the computational efficiency of TensorFlow compared to a loop over grid implementation in NumPy and a Fortran CPU scalar implementation.","Computational Fluid Dynamics (CFD); Tensorflow; Shallow Water Equations; Automatic Differentiation; Sensitivity Analysis; Checkpointing; Adjoint-based optimization; Partial Differential Equations solver; Differentiable programming","en","bachelor thesis","","","","","","","","","","","","Applied Mathematics","",""
"uuid:dd181433-488d-4234-8dae-64add27f7748","http://resolver.tudelft.nl/uuid:dd181433-488d-4234-8dae-64add27f7748","The new craft school for Ceramics","Vos, Sam (TU Delft Architecture and the Built Environment)","Stuhlmacher, M.E. (mentor); Warries, G.Y. (graduation committee); Reinders, L.G.A.J. (graduation committee); Delft University of Technology (degree granting institution)","2021","In the last decades, vocational education is having difficulties due to automation and robotisation. Which results in less vocational jobs and disappearing knowledge in most craftsmanship. One of the problems is the positioning of the ROC (the current vocational schools) in the Netherlands, fenced off buildings which are not connecting to their communities or their students. To create a new vocational school I will analyse different workshop through our history. To see which elements are interesting for the new craft school. At this new craft school the craft of ceramics will be learned. Because, in my opinion, this craftmanship is disappearing in the new buildings that are been build. Nowadays distinctive bonds are rare to be found, and most often simple bonds made from the most basic and cheapest bricks are been used in order to save money. At the new craft school the students learn specific skills but in order to learn these skills, the student should learn first the basics of producing and implementing bricks, to become valuable craftsman. in this booklet the different researches will be clarified in which the system for the new craft school will be explained, the production and implementation of ceramic bricks will be highlighted, the location will be unravelled and the users will analysed.","","en","master thesis","","","","","","","","","","","","","",""
"uuid:822e01a4-ab71-4278-b378-71674f62094b","http://resolver.tudelft.nl/uuid:822e01a4-ab71-4278-b378-71674f62094b","Reconnecting port-city interfaces in regions of transition : a model for the reuse and phytoremediation of port refinery sites to reconnect them to urban, ecological and social systems","Vos, Martijn (TU Delft Architecture and the Built Environment)","Vink, J.A. (mentor); Kuzniecow Bacchin, T. (graduation committee); Holst, J.P.G. (graduation committee); Mulder, A. (graduation committee); Zijlstra, H. (graduation committee); Delft University of Technology (degree granting institution)","2020","Port-city interfaces have grown apart over the last few decades, resulting in a disbalance between ports and cities. This thesis focuses on finding an approach to reuse and remediate unused industrial sites in sensitive port locations while making them ready for a post-carbon era. The project uses phytotechnologies for remediation of polluted soil on an old refinery site and the construction of a series of laboratories that are made from reused materials and productive phytoremediation landscape around the old refinery installations and are hosted by the old refinery installations,.","Reuse; Phytoremediation; Refinery; Port-city interface","en","master thesis","","","","","","","","","","","","Architecture, Urbanism and Building Sciences | Transitional Territories","","51.045376, 2.332961"
"uuid:23f87848-8c8e-4cf4-bc9f-381df7f69865","http://resolver.tudelft.nl/uuid:23f87848-8c8e-4cf4-bc9f-381df7f69865","City Hall Brussels","Vos, J.C. (TU Delft Architecture and the Built Environment)","De Vocht, S. (mentor); Parravicini, M. (mentor); Rosbottom, D.J. (mentor); Pimlott, M. (graduation committee); Delft University of Technology (degree granting institution)","2020","The city of Brussels wishes to realise a new administrative building centrally located within the city’s pentagon. Brussels, being the capital city of both Belgium and the European Union, is considered a heterogeneous city, consisting of 183 nationalities. This heterogeneity becomes a defining characteristic of the metropolis, however a variety of other inhabitants of the city are commonly left unnoticed. Urban sprawl causes natural land to disappear, affecting biodiversity; not only of the countryside but also that of cities. Of which the latter is increasing. Some species have been in the city for years, a growing amount is migrating only recently. However, urbanisation and global warming i.a., is putting the flora and fauna of Brussels under pressure. While exploring the studio theme ‘the palace’ and ‘political space’ with its inherent representational function, ‘rights of nature’ became a defining topic for this project. Related to this topic, the project explores the use of lime-hemp, a circular building material, manifested in an economically feasible manner in such a large-scale building through prefabricated construction techniques, in order to rethink ways of building to reduce our carbon footprint by the construction industry. Whilst achieving a pleasant indoor climate for the 1700 employees working for the City of Brussels as well as the animals inhabiting the building envelope, realised through the material’s breathing capacities. The proposed design aims to take part of a developing ecological network of Brussels Capital Region as well as to revitalize the relationship between humans and the natural environment. In order to restore ecosystems and biodiversity whilst serving as an exemplary to its surrounding as well as a responsibility to the environment.","City Hall; Brussels; Circularity; Post-Anthropocene","en","master thesis","","","","","","","","","","","","Architecture, Urbanism and Building Sciences","",""
"uuid:c9d9cdc6-4f98-4730-8fb6-43e6e3444002","http://resolver.tudelft.nl/uuid:c9d9cdc6-4f98-4730-8fb6-43e6e3444002","Adversarially Robust Decision Trees Against User-Specified Threat Models","Vos, Daniël (TU Delft Electrical Engineering, Mathematics and Computer Science)","Verwer, Sicco (mentor); Lagendijk, Inald (graduation committee); Loog, Marco (graduation committee); Delft University of Technology (degree granting institution)","2020","In the present day we use machine learning for sensitive tasks that require models to be both understandable and robust. Although traditional models such as decision trees are understandable, they suffer from adversarial attacks. When a decision tree is used to differentiate between a user's benign and malicious behavior, an adversarial attack allows the user to effectively evade the model by perturbing the inputs the model receives. We can use algorithms that take adversarial attacks into account to fit trees that are more robust. In this work we propose an algorithm that is two orders of magnitudes faster and scores 4.3% better on accuracy against adversaries moving all samples than the state-of-the-art work while accepting an intuitive and permissible threat model. Where previous threat models were limited to distance norms, we allow each feature to be perturbed with a user-specified threat model specifying either a maximum distance or constraints on the direction of perturbation. Additionally we introduce two hyperparameters rho and phi that can control the trade-off between accuracy vs robustness and accuracy vs fairness respectively. Using the hyperparameters we can train models with less than 5% difference in false positive rate between population groups while scoring on average 2.4% higher on accuracy against adversarial attacks. Lastly, we show that our decision trees perform similarly to more complex random forests of fair and robust decision trees.","Adversarial Machine Learning; Decision Trees; Cyber Security","en","master thesis","","","","","","","","","","","","Computer Science | Cyber Security","",""
"uuid:a90154e6-c705-482e-a5d2-f03bfe236e34","http://resolver.tudelft.nl/uuid:a90154e6-c705-482e-a5d2-f03bfe236e34","Mycelium Acoustic Panel: Growing, testing and designing with a novel bio-composite material","Vos, Jurjen (TU Delft Architecture and the Built Environment; TU Delft Architectural Engineering +Technology)","Bokel, R.M.J. (mentor); Bilow, M. (mentor); Delft University of Technology (degree granting institution)","2020","Mycelium composites are a novel material type. Mycelium is the ‘root’-network of a fungus and can be used to grow shapes on substrates of agricultural waste fibres. A few designs exist that use the material and information on material properties is limited. The goal of this thesis is to find out how mycelium composites can be produced, designed with and perform in an acoustic building product. A literature study on material properties shows acoustic absorption and thermal insulation are suitable functions for this material. The thesis describes impedance tube tests done on samples of mycelium and existing acoustic building products, reverberation room tests done on larger panels and shows microscopic images of the surface and sections. By growing the panels myself, a lot of hands on experience is gained, which was used to gather input for designing acoustic building products. Balancing acoustic absorption with mechanical properties and connecting the panels to the wall are important issues that have to be addressed, while there are opportunities in creating shapes and in sustainability. The designed panel was compared with existing mycelium, other bio-based and more conventional products in terms of acoustics, safety, health, durability, sustainability and price.","Mycelium; Building Acoustics; Impedance Tube; Reverberation Chamber; Product Development; Biodegradable; Bio-Composite","en","master thesis","","","","","","","","2022-04-17","","","","Architecture, Urbanism and Building Sciences","",""
"uuid:420e9459-9a7e-48d8-bf8d-3f1a80c520db","http://resolver.tudelft.nl/uuid:420e9459-9a7e-48d8-bf8d-3f1a80c520db","Energy planning for the unknown: On the potential of adaptive planning to guide the development of a future-proof energy system for the case of Schieoevers Noord, Delft","Vos, Linda (TU Delft Architecture and the Built Environment; TU Delft Applied Sciences)","van den Dobbelsteen, Andy (mentor); Flipse, Steven (mentor); Hackauf, Ulf (mentor); Wehrmann, Caroline (mentor); Delft University of Technology (degree granting institution)","2020","The Netherlands has a strong tradition of blueprint planning in spatial design. Since the financial crisis of 2008, a shift has been made to more organic approaches to development. Currently, a paradigm is evolving which is able to deal with complex challenges that the built environment faces today: a shortage of housing and a transition to sustainable energy. Industrial area Schieoevers Noord, situated in Delft, is developed with the rationale of this new paradigm: directing into the direction of a mixed-use and densified city district, yet with an open end. Since the Municipality of Delft does not own land in the 75 hectares large district, interdependencies exist between the municipality, project developers, and the current users: industrial companies. The problem statement of this research project: how to plan for sustainable energy supply (heat and cold supply) in a complex context characterised by interdependencies. The concept of adaptivity has been explored as a potential strategy to implement in a process of sustainable energy planning, resulting in the design of a five-step approach: the Schieoevers Noord approach for adaptive energy planning. Six characteristics of adaptive processes have been found based on a literature review. Three of these turned out to be absent in current approaches for sustainable energy planning: a way to explicitly incorporate uncertainties (unpredictability and interdependency) in planning, mechanisms for iteration, and the creation of conditions for development (rather than planning actual developments). The latter has been intensively studied by investigating heat and cold balances in different building scenarios (densities and function mixes), concluding in the need to shape conditions for development in Schieoevers Noord, by the proposal of energy-based design guidelines, ensuring energy-neutral developments, no matter the building volume or mix of building functions.","Sustainabilty; Energy Transition; Heat Transition; Area Development; Complexity; Adaptivity; Adaptive Planning; Uncertainty; Municipal policy; Delft; Schieoevers Noord","en","master thesis","","","","","","The master thesis is the result of a joint graduation project of the masters Architecture, Urbanism and Building Sciences (Track: Building Technology) and Science Education and Communication (Track: Science Communication).","","","","","","Architecture, Urbanism and Building Sciences | Building Technology | Sustainable Design","","51.994657, 4.366390"
"uuid:9ba7db70-aa7e-499b-8370-9120e2b197d4","http://resolver.tudelft.nl/uuid:9ba7db70-aa7e-499b-8370-9120e2b197d4","Computational Strategies for Model Predictive Control on Switching Max-plus Linear Systems","Vos, Daniël (TU Delft Electrical Engineering, Mathematics and Computer Science; TU Delft Mechanical, Maritime and Materials Engineering)","van den Boom, Ton (mentor); van der Woude, Jacob (mentor); Gupta, Abhimanyu (mentor); Aardal, Karen (graduation committee); Delft University of Technology (degree granting institution)","2019","A switching max-plus linear model is a framework to describe the discrete dynamics of the timing of events. To influence these systems one can choose the routes of jobs and the orderings of operations as input for the system. In this thesis the techniques of model predictive control are used to find good input values. The problem of finding the optimal input is however NP-hard, which means there is no guarantee to find the optimal in a reasonable amount of time. This is an issue for model predictive control on real applications of the switching max-plus model. In applications, on-line performance is used where there is limited time to compute the input values for control.\\ This thesis takes a look into methods to reduce the computational complexity of the MPC-SMPL problem. Alternative formulations such as reparameterization, model based-partitioning and the cutting plane method are developed and tested for the MPC-SMPL problem. To solve the MPC-SMPL problem 3 heuristics are designed and implemented for simulation. The heuristics are partition-based optimization, tabu search and simulated annealing. The goal is to find a strategy that obtains the best solution to the problem in a limited amount of time.","max-plus algebra; Scheduling; integer programming; Model Predictive Control; discrete event simulation; tabu search; simulated annealing; model based partitioning; Distributed Optimization","en","master thesis","","","","","","Double degree for the Master of Science in Applied Mathematics and Systems and Control.","","","","","","Applied Mathematics","",""
"uuid:fcdd6b06-ecb5-4d4f-9795-f4130c3ab7f6","http://resolver.tudelft.nl/uuid:fcdd6b06-ecb5-4d4f-9795-f4130c3ab7f6","Quantum correlation matrices and Tsirelson’s problem: Previous work and three-player considerations","Vos, Gerrit (TU Delft Electrical Engineering, Mathematics and Computer Science)","Caspers, Martijn (mentor); Delft University of Technology (degree granting institution)","2019","Tsirelson once claimed that the set of quantum correlations, defined by strategies of non-local two-player games, does not depend on which of two possible models is chosen: the tensor product model or the commuting operator model. He later came back from this claim, and the resulting conjecture is now known as Tsirelson’s problem. The problem has since been proven equivalent to notoriously hard problems in operator theory, such as the Connes’ Embedding Problem and the QWEP conjecture. In this master thesis, we look at the finite dimensional case of Tsirelson’s problem, working out all the details of an existing proof and giving a new, shorter proof which also extends to the nuclear case. Moreover, we give an overview of the equivalence of Tsirelson’s problem and two of Kirchberg’s conjectures, including the QWEP conjecture. Finally, we give some results and considerations for the three-player case of Tsirelson’s problem.
The appendix contains proofs of many related results used throughout the thesis, and also a beginner’s introduction to quantum mechanics.","Operator Algebras; Quantum Information Theory; Tsirelson's problem","en","master thesis","","","","","","","","","","","","","",""
"uuid:2b970216-3650-46f4-8fae-747a15eeacdf","http://resolver.tudelft.nl/uuid:2b970216-3650-46f4-8fae-747a15eeacdf","The Sailing Tug: A feasibility study on the application of Wind-Assisted towing of the Thialf","Vos, Bastiaan (TU Delft Mechanical, Maritime and Materials Engineering)","Hopman, Hans (mentor); Akkerman, Ido (graduation committee); Delft University of Technology (degree granting institution)","2019","The international maritime sector accounts for about 2% of all global carbon dioxide (CO2) emissions, the main greenhouse gas that causes global warming. Nations meeting at the United Nations International Maritime Organization (IMO) in London have proposed an initial strategy for the reduction of greenhouse gas (GHG) emissions from ships, setting out to reduce GHG emissions from international shipping by phasing them out as soon as possible with the aim to achieve zero emission by the end of this century. Heerema Marine Contractors (HMC) is a world leading marine contractor in the international offshore energy industry and aims to be a role model in environmental responsibility through carbon emission reductions.
As a result of HMC’s global activities, their fleet covers a considerable distance through transit across the globe. Their large semi-submersible crane vessels are conventionally transported through towing by a tug. The great amounts of fuel required for these transits provides a significant opportunity for the reduction of HMC’s carbon footprint. One such initiative proposed within HMC is the application of wind-assisted ship propulsion on the tow configuration.
This report presents an initial investigation of the feasibility of wind-assisted towing of the HMC’s Thialf, a semi-submersible crane vessel. Previous internal research at HMC showed the feasibility of using a discarded Panamax vessel as a floating breakwater. While operationally the discarded Panamax was found to be feasible, economically this was not the case. In this research, using the Panamax as a wind-assisted tug for towing the Thialf is investigated. As such the Panamax vessel can be employed for multiple purposes; for wind-assisted towing and as a floating breakwater, improving the financial feasibility.
To test the performance of a wind-assisted tow operation, a comprehensive 2D model is developed in this research to be able to check configuration variations in a wind-assisted tow setup. A conceptual design of a Panamax vessel converted into a sailing tug is implemented in a 2D model simulation. The performance in combination with the Thialf is assessed under the common environmental conditions experienced by the Thialf for various transit routes.
Results showed that the use of a wind-assisted tow configuration based on a Panamax, without using the Thialf propulsion is not feasible. The main point of failure is the required force balance transverse to the sailing direction. The Panamax basis used for the preliminary wind- assisted tug design proved to be not the optimal base case due to the limited leeward force generation under a drift angle and the large sensitivity to environmental loading. Although implemented measures improved the systems performance, it is debatable whether a wind- assisted tow configuration with the associated uncertainties is the most promising area to accomplish significant CO2 reductions.
The project client for this project is SITA. SITA is a well known IT and hardware solution developer, who serves aviation customers worldwide. Instead of letting airport and airlines develop their own baggage service, SITA could be a party who offers an universal service. However, this trend is unknown territory for SITA, and they have limited understanding of the experiences of passengers. For SITA it is interesting to be inspired of how a baggage pick-up service would look like and what their role could be.
The pick-up moment is a critical moment in the service journey. In a short time-span, the service needs to leave a good impression, exchange the baggage and check it in. Then, the courier needs to be on its way again, and the passengers should be left behind with a good feeling. Especially this exchange feels unequal for the passengers. This resulted in the following research question: How to facilitate a trustworthy moment for families to ‘hand-over’ their hold-luggage to a first-mile baggage service (home pick-up to arrival airport delivery), so they can travel carefree to their destination.
In the designed service concept the passenger and courier identify each other with the use of a chip that is connected to a platform; where the data is stored and distributed to the partners of the service. By checking the baggage allowance and securing an Electronic Bag Tag to the luggage a check-in experience is enhanced. And prepares the passenger for a paperless and self-service future travel. Moreover, the passengers get access to the Bag Journey Planning to maintain tactile visibility over their belongings. During the moment the helping-hand attitude of the courier is crucial for the customer experience.
The interaction is supported by, a SITA, API cloud platform that makes the communication; sharing and usage of the data-sets, possible at this moment. Additionally, SITA offers a standard interface, through which partners can access the platform, that is runs on the own application of the courier partner. The biggest challenge for SITA is to manage all the API calls the couriers’ devices make, especially when the amount API calls per minute grows, the use of a baggage home pick-up service grows. Nevertheless, the proposed role lays within the core activities of SITA.
The validation with the target group revealed a rising positive development from the moment the courier arrives at the door and leaves with the bags. The participants were enthusiastic and had faith in the service quality. They called it: customer-friendly, easy, personal, and therefore they would go on holiday with a more secured feeling.
The project showed an exciting potential for SITA to be a disrupter in the aviation world and offer a universal baggage service. However, there are a few to-do’s for continuing the project: Develop a tactical roadmap, construct a business case for the EBT, research the needs of the courier, and search a case owner within SITA.
that gives minimum energy.
The energy of a membrane with conical inclusions can be derived using the point particles model with corresponding formalism developed by Dommersnes and Fournier [1]. In this thesis, we apply this formalism to the finite size particles model described by Weikl et al. [2]. We compare the results of both
models for a system of three inclusions, to validate the point particles model’s ability to accurately predict equilibrium patterns for conical inclusions. For most non-conical inclusions, however, the point particles model proves inadequate, leaving only the computationally intensive finite size particles model to be used for more complex inclusions.
We develop a new numerical method for finding equilibrium patterns: the gradient descent method. This method is several hundred times faster than the standard Metropolis algorithm, and gives acceptable results. For large systems of inclusions, the method is very sensitive to local minima and has difficulties
merging small groups. The addition of noise in the Brownian motion method proves to be unable to resolve the local minima sensitivity, but we speculate that small bursts of high noise or grouping stable inclusions structures and moving the groups as a whole may be more effective.
Using the point particles model, we found that four-inclusion square-shaped structures and six-inclusion butterfly-shaped structures are favored in all systems with more than six inclusions.
In a compensatory tracking experiment with eleven participants, co-adaptive HSC is compared to time-invariant HSC. During the experiments, the participants control a time-varying controlled element, which changes from a single integrator to a double integrator and back unannounced. Time-invariant HSC was designed for controlling a single integrator, whereas co-adaptive HSC adapted to the human by continuously estimating the time-varying parameters of the operator using an Extended Kalman Filter (EKF). This online identified model of the operator was directly used in the shared controller, therefore, the co-adaptive HSC imitates human behavior.
A 36% decrease in conflict rate (the percentage of time in which the human force and the controller force have opposite directions) was found for co-adaptive HSC compared to time-invariant HSC when the controlled element was a
double integrator. However, for some participants incorrect EKF-estimation of the neuromuscular damping resulted in undesired oscillations in control force during co-adaptive HSC. This indicates that the performance of co-adaptive HSC can be further improved.
Overall, this study proves that co-adaptive HSC is a promising method to reduce conflicts, and is able to adapt to operator behavior in unforeseen situations.","co-adaptation; haptic shared control; extended kalman filter","en","master thesis","","","","","","","","","","","","Mechanical Engineering","",""
"uuid:bb5a8337-d5f9-42a5-88b1-871e38ab9934","http://resolver.tudelft.nl/uuid:bb5a8337-d5f9-42a5-88b1-871e38ab9934","Re-Envision the Public Library: Searching for the new Library Identity: The House of Imagination","Vos, Dorine (TU Delft Architecture and the Built Environment)","Caso, Olindo (mentor); Nottrot, Robert (mentor); van de Voort, Jan (mentor); Delft University of Technology (degree granting institution)","2018","When people think of the public library, they mostly imagine a silent place full of books; a place open to anyone who wants to access information without being disturbed. This collective idea of the public library does not correspond any longer to the way public libraries are used, designed, built and managed. In the recent years many new ways of transferring knowledge have arisen, mostly due to the impetuous development of ICT. This has put the original function of the public library in a new daylight. Since the public library is an open institution for everyone, it is directly influenced by the society we live in. This society is subjected to a lot of change today. With the end of the industrial revolution we are developing into a knowledge society where people have to learn throughout their whole lives. At the same time a creative economy is evolving where creativity is steadily gaining weight as a production factor. Also, the welfare is constantly subjected to change. Due to cuts by the governments the focus point of investment is shifting all the time, which affects governmental institutions and results in a changing welfare. Finally, we can observe a movement in the demographic structure influenced by global connections. A structure, where it becomes common that different groups of people live next to each other. Subjected to a continuous integration of new cultures, in which exchanges happen in real time. This research focuses on the social and cultural value the public library has today and the way it can respond to the changing society we live in. If we look at the recent library developments we see a missing link between the actual library values and the library design. Architects have more or less re-invented the library at any new assignment. But, what is the contemporary identity of the public library, and what aspects have to be taken into consideration in order to design the library of our time? In order to redefine the ‘architype’ of the public library, the sociological research of the library identity will be combined with an architectural analysis focusing on the architecture of the public library building. With assistance of existing trends in the field of library development and an architectural analysis of the modern contemporary library, the aim is to define a new identity of the public library. This can contribute as a guidebook for architects to design the public library today and in the future.
The design builds on the idea of a network of different library identities, where each library branch has his own expertise within a field of knowledge. The House of Imagination focuses on the world of fiction. The building is a continuation of the forest around it, based on the Voronoi structure that makes you able to find your way among collumns as trees in the woods. Finding light places to meet, secluded places of focus and hidden places of fairytales, connected by a ‘forest path’ trough the House of Imagination.
Amelander Zeegat (the Netherlands) are measured over a period of two weeks. The drifters performed well in the field (no drifter losses) but the results showed relatively frequent data gaps and filtering resulted in significant data loss. The signal quality in the area appeared to significantly influence the data loss.
The velocities on the ebb tidal delta vary around 0.7 [m/s], depending on location, depth, tidal phase and wind. The spatial structure of the velocities shows generally a uniform flow structure. Different wind conditions caused the most significant changes in the spatial distribution of the velocities, followed by the effect of the tidal range. Waves were found to have an insignificant effect
on the flow velocities. A number different deployment configurations were investigated in order to shorten the measurement interval as much as possible. Due to the absence of spatial structure, spatial “resolution” can be exchanged for a shortened measurement interval by deploying the drifters in two or more groups across the research area. Methods for measurement verification using nearby ADCP-equipped measurement points are presented but not performed.
Overall, the described drifter measurement method provides a cheap way of measuring the spatial distribution of velocity in an area. However, the accuracy of the measurement has not been verified. Until then, the accuracy of the results is uncertain.","surface drifters; SEAWAD; Ameland Inlet; spatial distribution; budget; ADCP; GPS-trackers","en","master thesis","","","","","","","","","","","","","","53.458795, 5.556910"
"uuid:aee8fa84-e3cc-4b77-bee6-d14b36ebae10","http://resolver.tudelft.nl/uuid:aee8fa84-e3cc-4b77-bee6-d14b36ebae10","Embedded Control System for Calibrating Gas Analysers","Vos, Dirk (TU Delft Electrical Engineering, Mathematics and Computer Science)","van Genderen, A.J. (mentor); Delft University of Technology (degree granting institution)","2018","This Thesis report will discuss the development of embedded control systems for process control (in this case for the calibration of a gas analyser). The main research question being: Which control algorithm will be able to achieve the most optimal calibration procedure? A calibration bench which will be used to create a specific condition (gas concentration, gas pressure, gas flow) for a gas analyser, so that it can be calibrated accurately.
Embedded Systems usually suffer from low computation power and do not have a lot of resources available, so designing a control system for an embedded system will require some special attention.
Designing a good controller is never an easy task, every single component needs to be chosen in a way to meet the requirements and ensure best performance. Controller design both programming/simulations and hardware development: both are important to get a good regulation, direct/linear and predictable actuation is needed. Therefore hardware design should make sure that reading sensors and actuating actuators do not suffer from big non linearities or delays.
Software will make a big difference in the sense of: how efficient is the algorithm? Is it robust (what happens to the system when an error occurs, will it show unexpected behaviour or will it stay stable)?
This report has been cut in 5 big pieces: hardware design,
embedded software design, interface software design, model identification and
controller design.
Hardware design will elaborate on the electronic circuit design and the mechanical design of the pneumatics.
Embedded software design will elaborate on the software written for the control
board (which is responsible for regulating gas pressure and gas flow).
Interface software design will show the development of the GUI (Graphical User
Interface), so the user can interact with the calibration bench by simply clicking on buttons instead of working with a command line tool.
Model identification will explain how to get a prediction model of the process
out of the data of a set of carefully selected tests.
Controller design will elaborate more on the control algorithms designed and
how to use the prediction model found in model identification.","Control; Embedded; Embedded Systems; embedded systems; control; control system; control systems","en","master thesis","","","","","","","","2019-02-02","","","","Electrical Engineering | Embedded Systems","",""
"uuid:572799e4-bcdc-49e2-8350-6cf535abd80b","http://resolver.tudelft.nl/uuid:572799e4-bcdc-49e2-8350-6cf535abd80b","Design Thinking at KPMG: Introducing a toolkit for the proposal development process","Vos, Gijs (TU Delft Industrial Design Engineering)","Calabretta, Giulia (mentor); de Jonge, Femke (mentor); Roelofs, Jill (mentor); Delft University of Technology (degree granting institution)","2017","Some consultants within KPMG advisory feel like the services that KPMG advisory generates for its clients, could be improved. They see a potential solution within the application of design activities related to design paradigms such as user experience and customer experience. However several hurdles are experienced within the introduction of these approaches. In other words there are difficulties with the successful introduction of an approach called design thinking.
According to a market analyses, KPMG’s advisory services has maintained about the same size in a growing advisory market, where competition has increased the past seven years. KPMG is the only company of the Big Four that has not grown within the past seven years. In the meantime KPMG has lost its leading advisory position within the Big Four consultancies to Deloitte.
The market for business services is changing. There is increased competition caused by growing competitors and new European and Dutch audit legislation. In addition clients expect better business services and better business service experiences. KPMG’s position on the advisory market, the growing competition and the development of increased expectations of business services indicate the need for new ways to develop better experiences for clients. Design thinking is an approach that can be used to do just that. Therefore the assignment of this project was to find a way to introduce design thinking in a successful way at KPMG and design a solution that would enable consultants to apply it in their profession.
Design thinking is an approach that centralizes human needs by using technology driven solutions in combination with business feasibility. This way design thinking can be used to develop holistic systems that solve multiple problems at ones. The design thinking process exists out of three stages, inspiration, ideation and implementation. Each of these stages exist out of several design activities. To apply design thinking, a certain mindset is needed. One needs to be empathic, use integrative thinking, collaborative, optimistic and experimental to successfully apply design thinking. This mindset can be created under the right conditions.
There are several hurdles associated with the introduction of design thinking within corporations. To learn why and how design thinking is applied within corporation, qualitative research was done with design professionals. This research resulted into several advantages that design thinking brings into corporations and strategies to introduce the approach into corporations.
Through conversations and interviews with consultants several hurdles and strategies for the introduction of new initiatives, such as design thinking, were identified. Together with the results of the research with design professionals, these findings were translated into a list of requirements for successful design thinking introduction within KPMG.
The value of design thinking should be expressed in terms time and money to make its application interesting for consultants. It should be applied within a service that has often been provided by KPMG and that as many consultants as possible are part of in order to succesfully spread it through the organisation.
The proposal development process meets all the requirements that are addressed in these lists. Through the application of context generating methods, co-creation session and idea testing, design thinking can potentially safe a lot of time, increase proposal acceptance and improve the experience of clients at the same time.
To enable consultants to take advantage of these design thinking characteristics, a toolkit for the proposal development process was designed based upon existing design thinking methods. The toolkit is called KPMG Essence and exists out of four stages that are associated with the design stages. These are 1. Plan, 2. Discover, 3. Ideate and 4. Preview.
The first stage exists out of tools that guide consultants in planning a co-creation session and gathering context about a clients problem. The second and third stages exist out of tools that guide a co-creation session with all consultants that are involved with the development of a proposal. The fourth step enables consultants to preview their ideas to clients and gather feedback about the generated ideas. This enables consultants to learn what direction to take within the further development of the proposal and to estimate whether they can offer the client the solutions they look for, before they spend day on writing a proposal in vain.
The Discover and Ideate stages were tested on a real life client case together with seven consultants. Consultants were very enthusiastic about the session and gave a the value of the session a 6 out of 7.
At the end of the report a plan of implementation and several recommendations are made for further development.
KPMG Essence provides a first step in the further application of design thinking within the proposal process. Furthermore it enables all advisory consultants to experience design thinking. As there are many more opportunities to introduce design thinking within KPMG the tool is expected to create awareness among enthusiastic consultants about how design thinking might also improve other services within KPMG.","Design thinking; design toolkit; organisational change; customer experience; consultancy","en","master thesis","","","","","","","Campus only","","","","","Strategic Product Design","",""
"uuid:3f3d4075-8e01-49d2-9d54-c58df85da79a","http://resolver.tudelft.nl/uuid:3f3d4075-8e01-49d2-9d54-c58df85da79a","Tailor-made Project Management: A redefined approach towards unique projects for Koninklijke Niestern Sander","Vos, Jasper (TU Delft Mechanical, Maritime and Materials Engineering)","Doorduin, Jan (mentor); Pruyn, J.F.J. (graduation committee); Hopman, J.J. (graduation committee); Wellens, P.R. (graduation committee); Delft University of Technology (degree granting institution)","2017","Conversion projects are considered as a growing market within the new build and in particular the repair market within the maritime industry, due to ever more demanding environmental regulations. A development that Royal Niestern Sander (KNS) embraces and wants to exploit further. Although conversion projects are already being executed, currently the thought prevails that ‘project efficiency could and should increase’.
The purpose of this research is to provide an approach that equips KNS establishing a best fit project organisation for in particular large, unique conversion projects to define, plan and execute these projects as
efficient and effective as possible, as this combines both repair yard and new building characteristics. Both individual organisations were analysed through the lenses of The Delft Systems Approach (DSA), to identify the current ‘as-is’ status. Subsequently, the processes and function responsibilities of key-players
of both organisations were assessed and compared. The root-causes for fundamental differences between organisational approaches were identified and proved to be project size, the degree of uncertainty and as a consequence of aforementioned causes, the contract form. Literature was consulted to explore already existing solutions regarding these aspects and to provide a wider, theoretical background in mainly organisation forms and the concept of maturity models.
The retrieved insight in the individual and comparative analysis in combination with the literature review provided a foundation for the establishment of an ideal framework, thereby integrating the new build and repair organisations in order to cope with large conversion projects, while simultaneously optimising the individual organisations. As input for the defined framework, scenarios were specified and correlated with actual performed projects that served as validation for the ideal framework. The case studies captured the complete range of projects, varying from small straightforward repair projects, to large new build projects and conversion projects in between. From these case studies, organisation proposals for the respective projects, large conversion projects
in particular, were distilled; comprising a structured implementation strategy that is to be executed during the order development phase (where project definition takes place).
To conclude, a roadmap for the near future is proposed containing the required steps to undertake for achieving operational excellence.","Project Management; Delft Systems Approach; Shipbuilding","en","master thesis","","","","","","","","2022-08-11","","","","","",""
"uuid:dd61dbae-67ea-4a67-b5f2-b9691240f729","http://resolver.tudelft.nl/uuid:dd61dbae-67ea-4a67-b5f2-b9691240f729","Exploration into the mechanisms that govern the stability of an Xbloc+ v1 armour unit","Vos, Amber (TU Delft Civil Engineering & Geosciences; TU Delft Hydraulic Engineering)","Aarninkhof, S.G.J. (mentor); Verhagen, H.J. (mentor); Hofland, B. (mentor); Reedijk, B (mentor); Jacobs, R (mentor); Delft University of Technology (degree granting institution)","2017","In this MSc thesis it is investigated how the first version of concrete armour unit Xbloc+, Xbloc+ v1, acquires its stability. The stability mechanisms are investigated by conducting two type of physical model tests. First, 23 dry pull-out tests are done to obtain insights into the aspects and mechanisms that influence the armour layer stability. At 8 locations per slope, blocks are pulled out to determine the force needed to extract an armour unit. Tests are done on a 3:4 slope with 2 pull-directions; under an angle of 45 degrees with respect to the slope and perpendicular to the slope. Concrete as well as plastic armour units are tested, both having a different surface roughness. The conclusions of the pull-out tests are verified by means of the second type of model tests; small scale physical hydraulic model tests in a 2D wave flume. In total, 10 tests are conducted; 6 tests with plastic armour units and 4 tests with concrete armour units. Each test starts with a run with a small significant wave height which is increased stepwise in each run until failure occurs. All test sections have a 3:4 slope and are subjected to waves with a 4% steepness. Additionally, the influence of the significant wave height step size for successive runs is investigated. The combination of both physical model tests results in recommendations for a change in design which is expected to lead to a higher stability of an armour layer with Xbloc+ armour units.","breakwater; concrete armour unit; Xbloc+; Xbloc+ v1; uniform; stability; extraction; pull-out test; 2D model test","en","master thesis","","","","","","","","","","","","","",""
"uuid:bd452b0a-f284-4f54-89d8-7f87221e0bbc","http://resolver.tudelft.nl/uuid:bd452b0a-f284-4f54-89d8-7f87221e0bbc","An algorithmic design method for structural glass roof structures: Research into the technical viability","Vos, Aurinke (TU Delft Civil Engineering and Geosciences; TU Delft Water Management)","Coenders, Jeroen (mentor); Nijsse, Rob (graduation committee); Louter, Christian (graduation committee); Bristogianni, Telesilla (graduation committee); van Gijn, FJ (graduation committee); Delft University of Technology (degree granting institution)","2017","The objective of this research is to investigate the possibilities of creating an algorithmic design for structural glass covers, to create an innovative methodology with a broad spectrum of potential applications. The methodology should stimulate the easy use of glass as a structural material. It should also contribute to the bridging of the gap between architects and structural engineers and take advantage of the potential of parametric design for architectural and structural purposes.","parametric design; structural glass","en","master thesis","","","","","","","","","","","","","",""
"uuid:1a4a182f-421f-4f87-ba2e-959493d6b5d6","http://resolver.tudelft.nl/uuid:1a4a182f-421f-4f87-ba2e-959493d6b5d6","A requirements engineering framework for rural hospitals in developing countries","Vos, J.B.","van den Berg, J. (mentor); Dignum, M.V. (mentor); Warnier, M.E. (mentor)","2017","","","en","master thesis","","","","","","","","","Technology, Policy and Management","Systems Engineering, Policy Analysis and Management (SEPAM)","","IA track","",""
"uuid:4de9aa1b-a9a9-4dcb-bfef-82fe4ae0584c","http://resolver.tudelft.nl/uuid:4de9aa1b-a9a9-4dcb-bfef-82fe4ae0584c","Coastal Seaweed Solutions","Vos, B.; Foursoff, W.; de Bruijn, L.; Bruijn, W.","de Vries, S. (mentor); Miedema, S.A. (mentor)","2016","In recent years, strange phenomena occurred in the Caribbean, Gulf of Mexico and West Africa: a massive tide of sargassum, brown algae, washed ashore causing considerable damage to the local economy and environment. The sargassum mostly consists of Sargassum Natans and Sargassum Fluitans. Old studies concluded that the sargassum came from the Sargasso Sea, however the most recent massive tide of sargassum (named as golden tide) came from an area north of the Amazon river delta. Texas A&M University of Galveston and the University of Florida developed detection systems in cooperation with NASAs satellite images. With the detection system it is possible to track, trace and make forecasts of sargassum landings. Hereby it is possible to act a few days before the sargassum washes ashore, instead of reacting when it landed on the beach already. Most of the problems occur when the massive influxes of sargassum are washed ashore. Currently, the most used harvesting methods on the beach are by use of rakes and wheelbarrows or by using mechanical equipment like a cane loaders and front-end loaders. The beach cleaning methods causes beach erosion and endangers local wildlife. Therefore, harvesting methods at sea are under development. Sargassum is an organic material and can be an useful source for processing. The most used processing methods of sargassum are burying at the beach or using it as a fertiliser. One of the challenges in processing sargassum is working with the unpredictable appearing character of sargassum. The known detection methods have been critically analysed and the most favourable method is developed by Texas A&M University Galveston. This system is applicable on other areas as well and it makes forecasts of sargassum landings. The harvesting methods have also been critically analysed and it can be concluded that the most recommended harvesting method has to be done at sea in combination with a floating barrier. Most of the problems are avoided in this manner. For processing multiple opportunities have been pointed out. Biofuel and bioplastics are having large potential. For the mean time using sargassum as a fertiliser is a su cient solution. The uneven appearances can be solved by drying the sargassum. Finally, an implementation plan is developed for Quintana Roo to overcome the sargassum problems. It is a step-by-step approach which can be conducted by a party who is willing to take the lead. In this approach the detection system of Texas can be used and new harvesting methods have to be developed. For processing, dry facilities have to be built in order to solve the uneven appearances.","","en","student report","","","","","","","","","Civil Engineering and Geosciences","","","","Multidisciplinary project",""
"uuid:324f054a-002b-4a80-b18e-5be0ecfe6dbb","http://resolver.tudelft.nl/uuid:324f054a-002b-4a80-b18e-5be0ecfe6dbb","Stop criteria for proof loading: The use of stop criteria for a safe use of ’Smart Proof loading’","Vos, W.","Hordijk, D.A. (mentor)","2016","Many bridges in The Netherlands are built around 1960-1970 and currently reach their designed service life of 50 years. The traffic loads are increasing and new insights in the behaviour of constructions are obtained. Therefore there are doubts about safety of these bridges and viaducts and these must be assessed. As the current safety codes have changed over the years, not all structures fulfil the current safety requirements, however replacement of the bridges brings undesirable high cost with it. Therefore alternative ways are sought to demonstrate the safety requirements. One way to do so is by proof loading, during which the structure is loaded in a controlled way. During proof loading stop criteria are used, which are measurable parameters that indicate the condition of the structure during the proof loading test. Reaching the predetermined value(s) of one or more stop criteria could lead or leads to abortion of the test, otherwise undesirable and irreversible damage of the structure or even failure might occur.","","en","master thesis","","","","","","","","","Civil Engineering and Geosciences","Structural Engineering","","Concrete Structures","",""
"uuid:30d69b56-b846-435e-9d44-6a31b840a836","http://resolver.tudelft.nl/uuid:30d69b56-b846-435e-9d44-6a31b840a836","An Example of a Measurable Set that is not Borel","Vos, G.","Hart, K.P. (mentor)","2016","This thesis gives a more detailed version of a proof from Daniel Mauldin that the set of continuous functions defined on the interval $[0,1]$ that are nowhere differentiable is not Borel. On the other hand, it is shown that the same set is Lebesgue Measurable. The theorems and definitions that are necessary in the proofs are given in the Glossary, where a knowledge of the course Real Analysis is expected. The proofs of most of these theorems are given in the Appendix","","en","bachelor thesis","","","","","","","","","Electrical Engineering, Mathematics and Computer Science","Delft Institute of Applied Mathematics","","","",""
"uuid:0ebb0f3b-e352-4f3c-8465-5c6be2812a90","http://resolver.tudelft.nl/uuid:0ebb0f3b-e352-4f3c-8465-5c6be2812a90","Basic principles of the traveling salesman problem and radiation hybrid mapping","Vos, T.D.","Aardal, K.I. (mentor)","2016","Every biological aspect of a create is described in the DNA. The DNA consists of very long strings that contain every biological information. Because these strings are very long, finding the right piece of information is a tough job. Fortunately, we have developed multiple ways to do this more quickly. Radiation hybrid mapping is such a method, it creates a map that shows us the locations of some essential pieces of information. We create a map with the help of the traveling salesman problem. The traveling salesman problem is a mathematical way to describe the desire to find tour through a set of places of minimal costs. The problem is not easy to solve, but many methods have been developed to make the search for the optimal solution easier. Dantzig, Fulkerson and Johnson constructed a combination of algorithms that solves the traveling salesman problem quickly in most practical efforts. With their technique we can construct the radiation hybrid map. Finally, there are many factors that determine the success rate of the map. With the right adjustments, we can create some large maps with a fairly good success rate, but doing so appears to be quiet difficult.","","en","bachelor thesis","","","","","","","","","Electrical Engineering, Mathematics and Computer Science","Delft Institute of Applied Mathematics","","","",""
"uuid:3c6c4bb2-f192-4fed-98d5-7aa70dac71e6","http://resolver.tudelft.nl/uuid:3c6c4bb2-f192-4fed-98d5-7aa70dac71e6","Decision Support Method for the Initial Selection of a Breakwater Alternative in Dutch Inland Waterway","Vos, G.J.","Jonkman, S.N. (mentor); Hombergen, L.P.I.M. (mentor); Kuiper, C. (mentor); Van der Linde, P. (mentor); Verhagen, H.J. (mentor)","2016","Many breakwater projects start with the selection phase which consists of the consideration of alternatives. These breakwaters are required to protect ports, banks and habitat areas from significant wave action. Moreover, upcoming Design & Construct contracts drive contractors to perform the consideration of alternatives and design themselves. Therefore, knowledge about the design of breakwaters is highly preferred in those cases. This leads to less of outsourced work and reduction in engineering time. In 2013, contractor Hakkers designed and constructed a small-scale breakwater in IJburg, Amsterdam. The constructed breakwater was built in inland waterways where the magnitude of the boundary conditions are limited (for example, small water depth and wave heights). Compared to coastal areas with more significant boundary conditions, this leads to less detailed structures without crown wall or multi-layers, to breakwaters with smaller dimensions and to other breakwater alternatives (for example, synthetic and reef breakwater). The goal was to develop a comprehensive method for a quick selection of a breakwater alternative in Dutch inland waterways. The method had to provide knowledge about breakwater designs and support a factual assessment of breakwater alternatives. Furthermore, the EMVI (Economical Most Beneficial Registration) tender approach would be included as well, since it is more frequently applied to civil engineering projects. This implies that the focus is on an effective breakwater and an efficient design procedure.","breakwater structures; method of consideration; inland waterways; decision making; the Netherlands","en","master thesis","","","","","","","","","Civil Engineering and Geosciences","Hydraulic Engineering","","Hydraulic Structures","",""
"uuid:11704f38-a955-4569-9dc7-b7a353b2cc8b","http://resolver.tudelft.nl/uuid:11704f38-a955-4569-9dc7-b7a353b2cc8b","Motion analysis of a Semi-Submersible Crane Vessel at Inconvenient Draft: A flooding Tank approach","Vos, T.G.","Huijsmans, R.H.M. (mentor)","2015","Conventional computer programs based on radiation-diffraction theory are not able to predict the motions of a semi-submersible crane vessel in case the pontoons are only slightly submerged. Cause of the erroneous results are non-linearities like breaking waves on top of the pontoons and emergence of the pontoons itself. Objective of this thesis was to create a numerical model, capable of calculating these motions. A free flooding tank approach is used in order to capture the non-linear behaviour of a body. A significant improvement is found.","Heerema; flooding; tank; SSCV","en","master thesis","","","","","","","","2020-09-25","Mechanical, Maritime and Materials Engineering","Marine & Transport Technology","","Offshore and Dredging Engineering","",""
"uuid:1e5f9ba1-4adb-4da2-a6d3-8f179ebb348e","http://resolver.tudelft.nl/uuid:1e5f9ba1-4adb-4da2-a6d3-8f179ebb348e","Scheduling Automated Guided Vehicles in Container Terminals Using Max-plus-linear Systems","Vos, A.","Van de Boom, T.J.J. (mentor)","2015","In the highly competitive seaport industry, the optimization of operations in the container terminals is of great importance. The automated guided vehicles (AGVs) transport containers from the quay to the yard and vice versa. A max-plus-linear model is derived and by using a MILP formulation, the optimal schedule can be obtained. Due to the highly uncertain AGV travel times, a Monte Carlo algorithm is implemented to account for the perturbations in the system.","","en","master thesis","","","","","","","","2015-07-21","Mechanical, Maritime and Materials Engineering","Delft Center for Systems and Control","","","",""
"uuid:aac3b367-f2d0-4f70-bf84-431f3acffe47","http://resolver.tudelft.nl/uuid:aac3b367-f2d0-4f70-bf84-431f3acffe47","Una reunión educativa con el bambu (An educational meeting with Bamboo)","Vos, R.","Geldermans, R.J. (mentor); Nijsse, R. (mentor)","2015","The thesis is a research driven design study of a multiple floor/""high-rise"" building with a structure of Laminated Guadua bamboo in Guayaquil Ecuador. Dealing with earthquakes, context, structure and sustainability issues. The Thesis is strongly oriented to structure, the industry and the state of the industry itself but always driven by sustainable consequences. It tried to explore the possibilities and the limitations of the context and the material itself. Results of the research and the design have also been tested regarding most aspects of sustainability and physical tests have been made to verify the claims, although no decisive conclusion can be made.","bamboo; laminated bamboo; LVB; LCA; sustainability; earthquakes; sustainable structure; demontable; reusable; pre stressed stucture; three spheres of sustainability; Guadua","en","master thesis","","","","","","","","","Architecture and The Built Environment","Architectural Engineering and Technology","","Sustainable Design Graduation Project","","-2.203816, -79.897453"
"uuid:b99323e8-3110-4702-bf19-bff98d657653","http://resolver.tudelft.nl/uuid:b99323e8-3110-4702-bf19-bff98d657653","Estadio de la comunidad - Community stadium, El Paso , Cd. Juarez","Vos, J.E.","Vollers, K. (mentor); Dixit, D. (mentor); Westcott, J. (mentor)","2015","Complex Projects Border studio","Stadium; Sport; El Paso; Juarez; Interaction","en","master thesis","","","","","","","","","Architecture and The Built Environment","Architecture","","Complex Projects","","31.756898, -106.466382"
"uuid:f3509a3f-fa83-48d5-8a9c-bf0303748f1e","http://resolver.tudelft.nl/uuid:f3509a3f-fa83-48d5-8a9c-bf0303748f1e","Damping lateral vibrations of drill strings","Vos, K.","Van Dalen, K. (mentor); Kriesels, P. (mentor)","2015","Over the last decades the costs of drilling oil and gas wells have soared. One of the ways to reduce drilling costs is to drill the wells at a faster rate. This can be done by changing operational parameters, like the rotational velocity of the drill string or the weight on the bit. However, increasing these parameters can lead to violent vibrations down hole. The most significant, and least investigated, type of vibration is whirling. Whirling is the lateral vibration of a drill string. Especially backward and chaotic whirling (see Figure) can cause major damage to the drill string components. A solution has been invented to prevent these violent types of whirling from developing. This proposed solution is further investigated computationally, supported by experiments.","drillstring","en","master thesis","","","","","","","","2025-07-01","Civil Engineering and Geosciences","Offshore Engineering","","Offshore Engineering","",""
"uuid:5eaedabb-85af-4be4-8d84-d8d84af752be","http://resolver.tudelft.nl/uuid:5eaedabb-85af-4be4-8d84-d8d84af752be","Empty schools: Quantitative research on hidden vacancy among primary schools in the Netherlands","Vos, D.M.","Arkesteijn, M.H. (mentor); Van Oel, C.J. (mentor)","2015","Research on hidden vacancy among primary schools in the Netherlands. How big is the problem and what predictive factors can be distinguished; does the building matter? A quantitative study using a mixed linear regression model resulted in several factor related to vacancy and an impression of the current percentage of vacancy and its financial consequences.","primary school; hidden vacancy; school; vacancy; BAG; quantitative; DAS-framework; Building characteristics","en","master thesis","","","","","","","","2015-03-27","Architecture and The Built Environment","Real Estate & Housing","","Real Estate Management","",""
"uuid:60ad4fc1-73eb-4d7d-b598-771660342449","http://resolver.tudelft.nl/uuid:60ad4fc1-73eb-4d7d-b598-771660342449","Minimising Cost by Dynamic Modelling of Aircraft Recovery in Disrupted Operations","Vos, H.W.M.","Lopes dos Santos, B.F. (mentor); Curran, R. (mentor)","2015","","Dynamic Modelling; Aircraft Recovery; Airline Recovery; Recovery Operation; Airline Disruptions; Disruption Management","en","master thesis","","","","","","","","","Aerospace Engineering","Control and Operations","","Air Transport and Operations","",""
"uuid:9082235c-3f1c-41da-a85d-2ecf6e1c50cf","http://resolver.tudelft.nl/uuid:9082235c-3f1c-41da-a85d-2ecf6e1c50cf","Professionalizing Academic Industrial Designers","Vos, D.P.H.","Flipse, S.M. (mentor); Van der Sanden, M.C.A. (mentor); Smulders, F.E.H.M. (mentor); De Vries, M.J. (mentor); Stappers, P.J. (mentor); Schoormans, J.P.L. (mentor)","2014","I attended a double-degree master program at the Delft University of Technology (DUT). That means that I combined two master programs, namely Science Education and Communication (SEC) and Strategic Product Design (SPD), into one program. This double-degree program required me to integrate the graduation projects of both masters into one graduation project. This graduation report is about that integrated graduation project. Together with my supervisors I defined two graduation assignments that share the theme ‘professionalizing academic industrial designers’. For the SEC graduation project I looked into how the DUT can effectively support Industrial Design Engineering students and alumni in their professionalization efforts. For the SPD graduation project I developed a writing education method that is tailored to academic industrial design education and I looked into how a brand can make the learnings from this project operational for other education development projects for academic industrial design education.","professionalization; industrial designers; written communication","en","master thesis","","","","","","","","","Industrial Design Engineering - Applied Sciences","","","Science Education & Communication - Strategic Product Design","",""
"uuid:c89b4b77-060d-4d8e-8c65-0b9ef307c787","http://resolver.tudelft.nl/uuid:c89b4b77-060d-4d8e-8c65-0b9ef307c787","Analysis of barriers to implementing supercritical water gasification to process biomass waste in the Netherlands","Vos, S.C.","Correlje, A.F. (mentor); Kunneke, R.W. (mentor); De Haan, A.R.C. (mentor)","2014","","transition theory; biomass waste processing; supercritical water gasification; explorative case study research; multi-disciplinary systems design","en","master thesis","","","","","","","Campus only","","Technology, Policy and Management","Economics of Infrastructures","","","",""
"uuid:25943535-d6de-46a2-9c40-cf1bdd6864c1","http://resolver.tudelft.nl/uuid:25943535-d6de-46a2-9c40-cf1bdd6864c1","Help I want to grow Bamboo!","Vongsingha, P.; Vos, R.J.; Armijos Moya, T.","","2014","This ""designers' manual"" is made during the TIDO-course AR0533 Innovation & Sustainability. Bamboo could be the most sustainable building material for European use, however, it is not a sustainable material in Europe considering the transportation. So Europe is the most challenging continent for using and producing structural bamboo due to its climate conditions. This manual examines the possibilities for this by using greenhouses.","AR0533 Innovation & Sustainability","en","student report","","","","","","","Campus only","","Architecture and The Built Environment","Architectural Engineering and Technology","","","",""
"uuid:0640f4b3-8fc8-4d8f-9d8b-e47e6c98313d","http://resolver.tudelft.nl/uuid:0640f4b3-8fc8-4d8f-9d8b-e47e6c98313d","Delfi-n3Xt's Attitude Determiniation and Control Subsystem: Implementation and verification of the hardware and software","Vos, M.","Van Genderen, A.J. (mentor)","2013","Attitude determination and control is the estimation of the current orientation of a satellite and controlling or changing it in order to reach a desired orientation. In the current gener- ation of nano satellites an Attitude Determination and Control Subsytem (ADCS) plays an important roll and sometimes even critical roll. An ADCS is necessary in order to achieve certain mission objectives and to prevent the satellite from tumbling to fast. A failure of this subsystem can have serious consequences and can even lead to a failing mission. Because of the importance, this subsystem must be reliable and robust in order to reduce the risk of a failing system. To achieve reliability and robustness, a software framework must be designed and implemented that minimizes the risk of software failures. Apart from software failures the risk of hardware failures should also be reduced as much as possible. Therefore all hardware should be thoroughly tested, before it can be marked as a flight candidate. Besides reliability and robustness the software framework should also be user friendly. Because the Delfi-n3Xt’s ADCS incorporates two different micro controllers the software framework should be easy to adapt for different micro controllers. For future purposes the software framework should have a modular structure in order to make re-usability and extendibility possible. In this thesis the design and implementation of such a software framework is described. Fur- thermore, the process and results of testing the hardware thoroughly are presented.","Delfi-n3Xt; Attitude Determination and Control; magnetometer; reactionwheel; sun sensor","en","master thesis","","","","","","","","2013-05-12","Electrical Engineering, Mathematics and Computer Science","Computer Engineering","","Embedded Systems","",""
"uuid:7032767d-9e82-4b87-8e76-3224732001c6","http://resolver.tudelft.nl/uuid:7032767d-9e82-4b87-8e76-3224732001c6","Fieldwork coastal engineering: Artificial islands Asparuhovo, Bulgaria","Cats, G.; Disselkoen, M.; Galema, A.; De Greef, J.; Habets, C.; Van Loon, P.; Olij, D.; Oujamaa, I.; Rijsburger, S.; Stuij, S.; Treffers, J.; Tuinhof, T.; Veraart, S.; Versteegt, G.; Vos, G.J.; Vrolijk, E.; Chernaev, H.; Nikolova, S.; Moinova, D.; Karakolev, P.","","2012","Sirius Beach and Azalea Beach are beaches situated north of Varna in Bulgaria. The beaches have names of hotels situated at the beach. The hotel owners describe large scale erosion at the beaches over the years. Throughout the years groups of students from Delft have measured the waterline (by GPS) and the cross sections. The beaches are strongly influenced by the waves, because there is insignificant tidal motion. This wave domination is variable over the seasons (winter versus summer). For Azalea Beach only the waterlines were measured and the waterline was comparable to 2010. So, the erosion mentioned in 2010 is not monitored anymore. The waterline of Sirius beach shows erosion patterns in the north which has stabilized over the years. And the accretion in the south (mentioned in 2010 and 2011) has stopped. The cross section measurements show the same trends as the waterline measurements. Though it is hard to draw conclusions from the data. The seasonal variablility and the lacking accuracy of the measurements are the biggest problems. What is more, at Sirius Beach the test measurements of the wave pressure meter took place. This meter is used for the first time in de Bulgaria fieldwork series. The test close to the water line show breaking of waves, which is obvious in the coastal zone. At the end, the meter would be used in the water in front of Asparuhovo Beach. Asparuhovo Beach is a beach South of the city centre of Varna. It is a populair place in the summer as it is close to the city. At the Asparhovo Beach the interest goes to the development of the beach and the possible erosion. The measurements for this beach include the waterline measurements with GPS, the cross section measerements and the wave measurements. Except for the lateral measurement, the measurements of this year have been compared to the measurements of the previous two years. From these comparisons the conlusion can be drawn that the North side of the Asparuhovo Beach is hardly changed in the last three years. The South side of the beach does show significant change in the bathymetry and the waterline. Due to the large change in the waterline it is unclear if these changes are due to season variabiblity. In the coming years it would be recommended to take extra measurements in this area.","Fieldwork; Varna; Asparuhovo; Bulgaria","en","student report","TU Delft, Department Hydraulic Engineering","","","","","","Campus only","","Civil Engineering and Geosciences","Hydraulic Engineering","","","",""
"uuid:ccff7642-0a0c-4cfd-80d6-a41566bcf570","http://resolver.tudelft.nl/uuid:ccff7642-0a0c-4cfd-80d6-a41566bcf570","De gehele lifecycle met BIM","Vollebregt, D.W.P.; Vos, Y.R.","Koutamanis, A. (mentor); Wamelink, J.W.F. (mentor)","2012","‘The building life cycle in a complex and dynamic multi-stakeholder environment. Increasing the effectiveness of information with the aid of BIM at Amsterdam Airport Schiphol.’ This research is conducted to deepen the practical use of BIM. In the literature it is said that BIM is the new phenomena that will improve multiple defects within the construction sector. One of them is foreseeing the right information at the right place at the right time during the building life cycle. The aim of this research is to investigate if it is possible to optimise the information streams and if the management process within the building life cycle can be improved with the aid of BIM. This research focuses on two aspects; the fist one is the central and dynamic information administration aspect. The second one is the changes to management due to the implementation of this system. The fact that this trend causes the expected changes in practise is a question that can be asked. To find an answer a clear division will be made within this research, the two topics are Information and Management. These two topics are investigated during a test case at Amsterdam Airport Schiphol. Two optimal flowcharts will be generated and compared to give an answer to the main research question. The results will be written down in a manual that describes the manner how to use BIM in the stated environment.","BIM; Building Lifecycle; Project; Beheer; Facility Management; PDM","nl","master thesis","","","","","","","","2013-07-28","Architecture","Real Estate & Housing","","Design & Construction Management","",""
"uuid:6cc37531-debe-41ad-aef9-9010f41d5a2b","http://resolver.tudelft.nl/uuid:6cc37531-debe-41ad-aef9-9010f41d5a2b","Sedimentation reduction and check dam design in the Cilalawi River","Vos, G.J.","Wijnberg, K.M. (mentor); Wagiono, H. (mentor); Veenvliet, K.T. (mentor); Ribberink, J.S. (mentor)","2012","An overdose of sediment from the Cilalawi River is going into the reservoir Waduk Jatiluhur. This is resulting in the problem of reservoir capacity reduction. With water still coming from different rivers, the future will be inundation. In this matter the recommendation for this problem is check dam(s) and changing land use, stated by the local government, Perum Jasa Terta II (PJT II). These solutions can both reduce sediment transport in the river by respectively decreasing flow velocities and reduction in erodibility. The Cilalawi River and reservoir Waduk Jatiluhur are located in the province of Purwakarta, West Java, Indonesia. Cultivation, forest and buildings surround this river. Residents in this area are using the river for waste disposal, private fishing, washing and recreation, while chemicals and excreta heavily pollute it. What is more, the PJT II manages the policy for rivers in West Java region. On the contrary, there is currently no policy concerning the Cilalawi River, although, recommendation has been written for the described problem. Therefore, the goal is to use the design of a functional check dam to estimate the impact of the civil structure on erosion and sedimentation in the watershed. Land use changing is no option, because of the large surface area to treat, the additional high expenses and the essential sawah existence with high erodibility. The research questions to the theme and to achieve the goal are: 1. Which characteristics of the Cilalawi River and watershed are responsible for the sedimentation and erosion? 2. What would be the design of the functional check dam for the Cilalawi River? a) What are the requirements for the new check dam? b) What will be the time horizon of the check dam till its expiration? c) What does the designed check dam look like in the phase of preliminary design?","Cilalawi River; Indonesia; Citarum; check dam; erosion; sedimentation; modelling","en","bachelor thesis","","","","","","","","","Civil Engineering and Geosciences","Hydraulic Engineering","","","",""
"uuid:fd89beeb-1257-42cc-a2a2-7cf0d3b357a0","http://resolver.tudelft.nl/uuid:fd89beeb-1257-42cc-a2a2-7cf0d3b357a0","Interconnect estimation from C-code","Van Akkeren, R.; Bensdorp, S.; Vos, M.","Meeuws, R.J. (mentor); Van Genderen, A.J. (mentor); Mhamdi, L. (mentor); Bertels, K.L.M. (mentor)","2008","FPGAs are easy and cheap to produce, a world of new possibilities is opened. One of those is in the area of reconfigurable computing. It is possible to extend normal CPUs with FPGAs for specific tasks, especially for those tasks which requires a lot of computational power. The Delft WorkBench is such a project. In this project, C-code is directly rewritten into a new piece of software and a set of hardware descriptions, suitable to program on a FPGA. In the rewritten part of the software, the computational parts are replaced by simple instructions to control the FPGA. The FPGA will run in parallel with the software and in this way, software can work up to 100 times faster. This thesis focus on the estimation of the required area of interconnect on a FPGA, depending on a given set of software metrics. These metrics are found by a special compiler, based on ELSA, and are specific for each part of C-code. With this estimation, it is possible to say, in an early stage of the whole process, if a certain part of software will fit on the FPGA. The developed model is based on a dataset from 127 kernels and is suitable for the Virtex2 and the Virtex4 platforms.","","en","bachelor thesis","","","","","","","","2009-09-08","Electrical Engineering, Mathematics and Computer Science","Electrical Engineering","","","",""
"uuid:51e05398-ef4e-48bd-8dbe-5ee80c8b3a3f","http://resolver.tudelft.nl/uuid:51e05398-ef4e-48bd-8dbe-5ee80c8b3a3f","Buckled precompressed elements: A new class of control actuators for subscale UAVs","Vos, R.","Van Tooren, M.J.L. (mentor); Barrett, R.M. (mentor); Krakers, L. (mentor); Abdalla, M. (mentor)","2007","This thesis presents the use of a new class of flight control actuators employing Post-Buckled Precompressed (PBP) piezoelectric elements in morphing wing Uninhabited Aerial Vehicles (UAVs). The new actuator relies on axial compression to amplify deflections and control forces simultaneously. Two designs employing morphing wing panels based on PBP actuators were conceived. One design relied on a change in curvature of the actuators to control the camber of the airfoil. Axial compression of the actuators was ensured by means of rubber bands and increased end rotation levels with almost a factor of two up to +/- 13.6deg peak-to-peak, with excellent correlation between theory and experiment. Wind tunnel tests quantitatively proved that wing morphing induced roll acceleration levels in excess of 1500deg/sˆ2. A second design employed PBP actuators in a wing panel with significant thickness, relying on a highly compliant Latex skin to allow for shape deformation and at the same time induce an axial force on the actuators. Bench tests showed that due to the axial compression provided by the skin end rotations were increased with more than a factor of two up to +/- 15.8deg peak-to-peak up to a break frequency of 34Hz. Compared to conventional electromechanical servoactuaters, the PBP actuators showed a net reduction in flight control system weight, slop and power consumption for minimal part count. Both morphing wing concepts showed that PBP piezoelectric actuators have significant benefits over conventional actuators and can be successfully applied to induce aircraft control.","adaptive; morphing; piezoelectric; postbuckled","en","master thesis","TU Delft, Aerospace Engineering, Design of Aircraft and Rotorcraft","","","","","","","","Aerospace Engineering","","","","",""
"uuid:90352489-00c3-47d1-8de6-8d471b937724","http://resolver.tudelft.nl/uuid:90352489-00c3-47d1-8de6-8d471b937724","Future forms of urbanization: An Application for Tigris XL on Spatial Policies in the Netherlands","Vos, G.J.L.","Sanders, F.M. (mentor)","2007","Spatial planning is, foremost, regarded as a political method to influence the geographic distribution of activities. The Netherlands has a strong tradition in spatial planning. The national government has put great efforts to direct the spatial developments and to control the urbanization process in the Netherlands, though the existing planning system is under pressure. The newest Report on Spatial Planning, the Spatial Memorandum, marks a conceptual change in the planning approach of the national government. This shift corresponds to the exchange of a generic planning approach, with a well defined national agenda to direct the urbanization process, for a more liberated re/af/ona/approach, based on the cooperation of local authorities, private investors and social actors. The spatial developments will be organized bottom-up, with a facilitating role for the national planning agency. But at the same time, the national planning agency will have to cope with the increased influence of European regulations and intersectoral policies. Both tendencies affect the position and the activities of the institute of national planning, while the responsibility for the national spatial structure maintains. The transition of national spatial planning forms the background for this project. The research explores the effects of different national spatial strategies for the distribution of population and employment in the Netherlands. The experiment consists of a scenario-study for generic and relational spatial strategies in a modelled environment. For this research, we will use the newly developed LUTI-model TIGRIS XL. This simulation model calculates the future developments, based on national economic and demographic developments and the location choice of citizens and firms. The TIGRIS XL-model can be applied with different input-scenarios for both traport policies and spatial policies. The input-scenarios for this research only involve the options for spatial strategies. The research combines different aspects in the field of spatial planning, e.g. spatial policy-making and the use of technological tools. Recommendations are made for the orientation of the institute of national spatial planning. Furthermore, the possibilities are discussed to apply different spatial strategies in TIGRIS XL and the functioning of this model. The project regards three different input-scenarios. The scenarios function as a derivative for national spatial strategies and contain the typical elements, based on the principles of generic and relational planning options. A short description of the input scenarios will be discussed below: 1. Reference Policy; a generic scenario, with spatial program for both 'Greenfield' and 'Brownfield' developments. The implementation is flexible towards the housing demand. The composition of this spatial program supposes a continuation of the existing spatia organization. 2. Restrictions Light-policy (RL-policy); a re/af/ona/scenario, based on landuse restrictions and a deregulated land market The scenario puts minimal restrictions and guarantees a large degree of freedom for spatial developments 3. Restrictions Heavy-policy (RH-policy), a relational scenario which is based on a deregulated land market and heavy landuse restrictions, especially laid upon by the Flood Control-policy. The simulations of the input-scenarios represent divergent spatial processes. The Reference policy shows a continuation of existing spatial structure. The developments in the central area of the Randstad and the urban agglomerations in Twente, Arnhem/Nijmegen and Northern Brabant increased, but the contrast with the other regions is limited. The simulation gave an unexpected result, especially concerning the spatial developments in rural areas. The reason is the required level of detail for the input. The simulation of a detailed spatial program is more suitable for local application and not for the simulation of national spatial strategies. The RL-policy stimulates the growth in the central area of the Randstad/Green Heart. Most developments take place within the Green Heart. The scenario illustrates the rise of a Metropolitan area in the western part of the Netherlands and an increasing gap with the peripheral regions. The RH-policy presents a dispersion of urban activities. The restrictions in the central area push-out the spatial developments to the surrounding regions. The gap between the central area of the Randstad and the periphery diminishes. The effects for the national spatial structure are mainly at the cause of the input-scenarios, whereas the regional and local developments are determined by the parameter-settings in TIGRIS XL. In this respect, all three simulations show a concentration of population and employment for the stronger regions. The developments at the local level represent a process of deconcentration or suburbanization. The directions of these processes are plausible and correspond to the recent trends in the Netherlands. The force of the deconcentration-process, however, is more difficult to obtain. In reality, the deconcentration process will be a little stronger, especially for a more deregulated landuse policy. The location choice factors which determine the process of deconcentration, have been estimated for empirical data on recent removals. These parameters need to be revised, to stay in-line with new socio-cultural trends and the location preferences of firms. The simulations of the relational concepts point out the effect of the external restrictions on the national spatial structure. This research points out that technological tools are available to perform ex-ante evaluations for different policy-packages. Hence, the study recommends an active participation of the national government in the international decision-making process, with a singular focus on the spatial organization of this highly dense nation. Consequently, the national government will have to pronounce its vision on the future development of the Netherlands and act affirmatively. The task for the local/regional actors is to translate the potential developments of the regions (and sub-regions) into concrete actions, with joined efforts of local authorities, private investors and social actors. The distinction between the relational planning approach and the generic planning approach contributes to the division of competences for different authorities. The TIGRIS XL-model constitutes both planning at the national level, in terms of restrictions, and at the local/regional level for a more detailed spatial program.","","en","master thesis","","","","","","","","","Civil Engineering and Geosciences","Transport & Planning","","","",""
"uuid:45b391ce-6297-4358-b17c-7eb4ec7da956","http://resolver.tudelft.nl/uuid:45b391ce-6297-4358-b17c-7eb4ec7da956","Time-Dependent Polynomial Chaos","Vos, P.","Gerritsma, M.I. (mentor)","2006","Generalized polynomial chaos is known to fail for long-term integration, loosing its optimal convergence behavior and developing unacceptable error-levels. In this work, we present a time-dependent alternative of polynomial chaos in order to overcome these issues. This technique exists out of an on-the-fly reinitialization of the polynomial chaos expansion at different discrete time-levels. At those time-levels, the new polynomial chaos expansion will be created in terms of the stochastic solution. This time-dependent approach is applied on a stochastic ODE of which the results are compared with a standard gPC solution.","long-term integration; uncertainty; stochastic ODE; polynomial chaos","en","master thesis","","","","","","","","","Aerospace Engineering","","","","",""
"uuid:0ace1118-4fe7-4e1f-97ad-b198bac27be8","http://resolver.tudelft.nl/uuid:0ace1118-4fe7-4e1f-97ad-b198bac27be8","The application of Sediment Transport Models to predict discolored water events","Vos, H.J.H.","Van Dijk, J.C. (mentor); Vreeburg, J.H.G. (mentor); Schaap, P.G. (mentor); Verberk, J.Q.J.C. (mentor); Van de Giesen, N.C. (mentor)","2005","This report will treat the use of models to predict discoloured water events. Discoloured water events happen when sediment in drinking water pipes is resuspended. This can lead to (brown coloured) sediment coming from the consumer's tap. As this is not desirable, models have been developed to predict these occurrences.","","en","master thesis","Technische Universiteit Delft, Faculteit der Civiele Techniek en Geowetenschappen, Sectie Watermanagement","","","","","","","","Civil Engineering and Geosciences","","","","",""
"uuid:e792914e-7921-4503-92dc-30ba15350f89","http://resolver.tudelft.nl/uuid:e792914e-7921-4503-92dc-30ba15350f89","Single Droplet Formation for a Liquid SnBi Alloy","Vos, M.","Mudde, R.F. (mentor); Van Heuven, J.W. (mentor); Oud, M.A. (mentor); Biglari, M.H. (mentor)","1998","A production process developed to produce tin-bismuth alloy shot particles directly out o f the liquid metal phase, appeared difficult to be controlled. Therefore, within this graduation project, the underlying physical principles o f droplet formation and the process parameters had to be characterised. After characterisation of the process parameters, the uniform production o f spherical particles had to be realised and controlled. A small scale experimental setup was used to test and realise these results. Periodic single droplet formation at the nozzle was demonstrated to be the most suitable mechanism for uniform shot production. A relation for the maximum uniform production rate was found and evaluated. Both the maximum production rate and the diameter of the produced shot are determined by the nozzle diameter, the metal flow rate through the nozzle, and the metal properties (surface tension and density). Oxidising gas components cause unstable droplet formation and non-spherical shapes. The viscosity of the coolant is determining for the end shape o f the shot particle.Tests with a high viscosity oil (also at elevated temperature) increased the sphericity of the shot particles. A maximum mean shot diameter of 3.3 mm was produced with a nozzle diameter o f 1.5 mm. The tin bismuth alloy showed non-wetting behaviour on the steel nozzle surface. The shape factor, defined as the ratio of the two longest lengths of an ellipsoidal particle, has been determined at 1.05. Uniform production of tin bismuth shot, directly out of the liquid metal phase is feasible, although it has been shown very sensitive to fluctuations in the operating conditions.","","en","master thesis","","","","","","","","","Applied Sciences","Kramers Laboratorium voor Fysische Technologie","","","",""
"uuid:00447e29-a8b3-4f04-99d0-1362c35be925","http://resolver.tudelft.nl/uuid:00447e29-a8b3-4f04-99d0-1362c35be925","A baseline for dimensioning the Unisource FastPacket backbone for LAN interconnect services","Vos, M.","Nijhof, J. (mentor); Smeitink, E. (mentor)","1994","Unisource Business Networks is the international service provider of three European PTT's. One of the services that Unisource offers its business customers is LAN interconnect. The backbone on which this service is delivered is a StrataCom IPX FastPacket backbone, with a congestion management system called ForeSight. ForeSight does not rely on end-user response to congestion notification, which is a great advantage when comparing to the CCITT defined standards. But ForeSight not only throttles end-users when there is congestion in the backbone, it also speeds them up when there is bandwidth free. The research that this report describes mainly focuses on three questions. First Unisource wants to have a dimensioning of the backbone with minimum risk of FastPacket loss. Second, ForeSight uses a lot of parameters that may influence the performance of PVC's, ports and the whole system. We need to standardise these parameters as much as possible to keep the backbone manageable, without losing a lot of performance. The last main question is to give some options for improving the dimensioning of the backbone in future. The baseline may be a safe dimensioning, but we need to develop a method which allows Unisource to take more risk and thus to decrease the backbone cost…","","en","master thesis","","","","","","","","","Applied Sciences","Electrical Engineering","","Telecommunications and Traffic Control Systems Group","",""
"uuid:c243a658-002e-4c98-b687-846427690e25","http://resolver.tudelft.nl/uuid:c243a658-002e-4c98-b687-846427690e25","Prefab-tunnelbouw, als flexibel alternatief: 'n variant voor de Betuweroute","Vos, O.M.T.","Glerum, A. (mentor); Venema, W.K. (mentor); Bezuyen, K.G. (mentor); Polen, B. (mentor)","1993","Er wordt uitgegaan van het aangegeven voorkeurstracé. Er wordt geen aandacht besteedt aan een eventueel alternatief tracé. Het project wordt beperkt tot het ontwerp van een alternatieve aanleg voor lange baanvakken, inclusief de bijbehorende kunstwerken. Speciale kunstwerken ter plaatse van kruisingen met rivieren en kanalen worden niet nader behandeld. Voorbeelden van deze kunstwerken zijn de kruising met het Amsterdam-Rijnkanaal bij Tiel, kruising met het Pannerdensch Kanaal bij Groessen en de kruising met de Noord volgens het Sophia-tracé. De berekeningen van de constructie en de bouwkuip zijn gebaseerd op de situatie nabij Papendrecht. Er is voor Papendrecht gekozen, omdat daar de bodemopbouw en de waterhuishouding bijzonder gecompliceerd zijn. Met betrekking tot de aanleg van een verdiepte constructie zijn hier de meeste problemen te verwachten. Ter plaatse van Papendrecht is het tracé direct naast de A15 en een woonwijk gesitueerd. Momenteel zijn ter plaatse van de woonbebouwing nog geen mitigerende maatregelen t.a.v. geluids- en visuele hinder getroffen. De gevolgen van de aanleg en exploitatie van een bovengrondse Betuweroute zullen hier bijzonder groot zijn.","tunnel; railroad tunnel; prefabrication","nl","master thesis","","","","","","","","","Civil Engineering and Geosciences","Hydraulic Engineering","","Geo-engineering","",""
"uuid:fa8ee260-49a2-49bf-9af6-6a3dec7cc183","http://resolver.tudelft.nl/uuid:fa8ee260-49a2-49bf-9af6-6a3dec7cc183","Plaatsingscriteria voor een DGPS Referentiestation","Vos, M.","van Nee, R. (mentor); van Willigen, D. (mentor)","1993","Het Global Positioning System is een satellietnavigatiesysteem dat zowel voor civiel als militair gebruik bedoeld is. De nauwkeurigheid voor civiele gebruikers ligt rond de honderd meter. Deze geringe nauwkeurigheid is ontstaat doordat in opdracht van het Amerikaanse Ministerie van Defensie het civiele signaal wordt gestoord. Deze verstoring heet Selective Availability (SA). Voor bepaalde toepassingen, zoals een precisie-nadering van een landingsbaan in slecht weer met een Jumbo 747, is dit veel te laag. Vanuit deze behoefte is DGPS (Differential GPS) ontstaan. Bij GPS worden vier afstanden (ranges) van minimaal vier verschillende satellieten gemeten. Uit deze ranges wordt de positie berekend. Het principe van DGPS berust op het corrigeren van de fout in de ranges per satelliet. De grootte van de fout is te meten door op een nauwkeurig bekende positie met een referentiestation de rangefout per satelliet te meten. Deze rangefout kan dan overgezonden worden naar mobiele gebruikers in de omgeving. Deze correcties zijn tot ongeveer 300 km. rond het referentiestation bruikbaar…","","nl","student report","","","","","","","","","Applied Sciences","Electrotechniek","","Telecommunicatie- en Verkeersbegeleidingssystemen","",""
"uuid:e6581902-46aa-44f5-b109-62ce196ff371","http://resolver.tudelft.nl/uuid:e6581902-46aa-44f5-b109-62ce196ff371","Simulatie scheepvaart IJmond","Vos, M.J.; Groenveld, R.","Velsink, H. (mentor)","1991","Het IJmond- gebied omvat de haven van Amsterdam, het Noordzeekanaal en de sluizen van IJmuiden. De probleemstelling richt zich op de planningsmethodiek voor de afwikkeling van de scheepvaart in dit gebied. Het afstudeerproject (in opdracht van DGSM) betreft het ontwikkelen van een simulatiemodel waarin de gehanteerde planningsmethodiek opgenomen is. Dit betekent dat het model het gehele IJmond- gebied moet omvatten. Dit model dient als hulpmiddel bij het optimaliseren van de planning en om de gevolgen van toekomstige veranderingen in het systeem te onderzoeken. Het model is ontwikkeld in de simulatietaal Prosim. Naast de beschrijving van het scheepsproces, zijn facetten als de kolkvulling, de beschikbaarheid van sleepboten, de invloed van het weer en de planningsstrategie opgenomen. Met het model zijn de volgende simulaties uitgevoerd: - de invloed van de maximale tijd dat er gewacht wordt met schutten op aankomende schepen: er is onderzocht wat de gevolgen zijn voor de gemiddelde passeertijd van de schepen. - de invloed van de spreiding van onderhoudsperioden van de grootste sluis op de passeertijden van de schepen. - de gevolgen van de groei van het verkeersvolume van bepaalde scheepstypen op de wachten passeertijden. Na de verifikatie van het model kan geconcludeerd worden dat het model goed aan de doelstelling beantwoordt. Naast de wachttijden geeft het model inzicht in de passeertijden, de sluisbezetting, enz. De uitgevoerde simulaties geven duidelijke overeenkomsten met de werkelijkheid.","IJmond; afwikkeling; scheepvaartproces; simulatiemodel","nl","master thesis","","","","","","","","","Civil Engineering and Geosciences","Hydraulic Engineering","","","",""
"uuid:37863941-5371-454c-9171-c5c75b5546ae","http://resolver.tudelft.nl/uuid:37863941-5371-454c-9171-c5c75b5546ae","Interactief hydrologisch computerprogramma, Hydrolin","Vos, M.J.","van Dam, J.C. (mentor); Vermeulen, J. (mentor)","1988","HYDROLIN gaat de mogelijkheden bieden om meetseries van neerslag en afvoer te verwerken in diverse modellen. Na de invoer van de meetseries via het toetsenbord kunnen hieraan diverse bewerkingen worden gedaan, zoals het aanbrengen van verliezen en scheidingen, teneinde met een keuze uit een scala van modellen een neerslag - afvoerrelatie af te leiden. Als eerste model is de theorie van de UNIT HYDROGRAPH - EENHEIDSAFVOERGOLF - ingebracht. Omdat de theorie van de UNIT HYDROGRAPH voor netto neerslag en de oppervlaktecomponent van de afvoer geldt, bevat HYDROLIN de mogelijkheid uit verschillende opties te kiezen om op bruto regengegevens verliezen in rekening te brengen en op de bruto afvoer een afvoerscheiding aan te brengen. Na invoer van de meetseries kunnen diverse manipulaties worden uitgevoerd met deze dataseries. Op vele wijzen is het mogelijk allerlei handige programma’s aan HYDROLIN te koppelen om bewerkingen te doen. Alle daarmee samenhangende databestanden worden op een extern geheugen vastgelegd, om tenslotte een selectie te kunnen doen ter bepaling van netto regen c.q. oppervlakteafvoer. Het “filtermanagement” wordt door de computer zelf en interactief afgehandeld als van HYDRDLIN-inputprocedures gebruikt wordt gemaakt. Alle in HVDRDLIN aangeboden opties worden in de vorm van menu's aan de gebruiker kenbaar gemaakt - het gehele computerprogramma is menu-gericht ontwikkeld. Ter verkrijging van de UNIT HYDRDGRAPH is een subprogramma voor de verwerking van matrices aanwezig. Weergave van de inhoud van de bestanden op het beeldscherm en naar een “extern device”, zoals een printer, kan geschieden in de vorm van data en grafisch.","Hydrologie; regenval; afvoer; oppervlakteafvoer; unit hydrograph","nl","student report","","","","","","","","","Civil Engineering and Geosciences","Water mangement en hydrologie","","","",""
"uuid:7d693964-3565-4c9c-9667-98a8a844caa1","http://resolver.tudelft.nl/uuid:7d693964-3565-4c9c-9667-98a8a844caa1","Ontwerp en berekening van de Zeekade aan de Britanniëhaven te Rotterdam","Vos, M.J.","Glerum, A. (mentor); Bourguignon, G.P. (mentor)","1988","Deelontwerp met detailberekeningen van de kademuur van de te ontwerpen Zeekade aan de Noordzijde van de Britanniëhaven te Rotterdam. Ontwerp van de damwand, de trek- en drukpalen en de dimensies van een L-vormige ontlastvloer.","Kademuur; damwand; havenconstructie","nl","student report","","","","","","","","","Civil Engineering and Geosciences","Hydraulic Engineering","","","","51.895, 4.24"
"uuid:81599de5-f048-4339-b75c-e0f93f3f5602","http://resolver.tudelft.nl/uuid:81599de5-f048-4339-b75c-e0f93f3f5602","Energie en Waterbouw: Energieanalyse van een gepenetreerde stortsteenglooiing","Vos, M.J.","Glerum, A. (mentor); Bourguignon, G.P. (mentor); Bijl, H. (mentor); Van den Hoek, K.A. (mentor); Olivier, J.G.J. (mentor)","1987","De behandelde energieanalyse, over het totaal van arbeidsprocessen, van een asfaltgepenetreerde stortsteenglooiing beteft een studie, die is verricht, binnen van tevoren te definieren grenzen van materiaal stromen in de diverse processen - van winning van grondstoffen, transport en overslag van grondstoffen c.q. halffabricaten tot de verwerkelijking van het eindproduct in situ energieinhouden/materiaalgegevens van stoffen en materieelgegevens, resulterend in een overzicht van de energieconsumptie in diverse procesfasen.","energieanalyse; arbeidsprocessen; stortsteen","nl","master thesis","","","","","","","","","Civil Engineering and Geosciences","Hydraulic Engineering","","Constructieve waterbouwkunde","",""
"uuid:d101bfa1-93ee-430d-91b6-7545013eee39","http://resolver.tudelft.nl/uuid:d101bfa1-93ee-430d-91b6-7545013eee39","Zedelijkheid en zelfbeheer: huisvesting van alleenstaande vrouwen in Nederland 1850-1965","Bentinck, Salomé; Vos, Annerieke","Bollerey, Franziska (mentor); van Duin, Leen (mentor); de heer, Jan (mentor); Sevenhuysen, Selma (mentor)","1981","","","nl","master thesis","","","","","","","","","Architecture and The Built Environment","","","","",""
"uuid:c8a104b6-e59c-4e79-b575-1988bf74a35c","http://resolver.tudelft.nl/uuid:c8a104b6-e59c-4e79-b575-1988bf74a35c","Beschouwingen over een processor-gestuurd datanet op basis van packet switching met berekeningen aan een model en een simulatie hiervan op een PDP 8","van der Rhee, J.; Vos, C.","Van Lommel, H.L. (mentor); Akerboom, J.P.M. (mentor); de Kroes, J.L. (mentor)","1973","Een studie is gemaakt van de mogelijkheden voor packet switching, toegepast als informatie-uitwisseling tussen b.v. computers en dataterminals of tussen terminals onderling. Berekeningen zijn gemaakt voor een model-verkeerscentrale in een dergelijk datariet m.b.t. stagnatiekansen en wachttijden. Voorts volgen enkele beschouwingen over de optimale packetlengte. Tenslotte is een simulatiemodel ontworpen, waarmee voornoemde berekeningen kunnen worden getoetst en/of het aantal gegevens kan worden uitgebreid.","","nl","master thesis","","","","","","","","","Applied Sciences","Electrotechniek","","Automatische Verkeerssystemen","",""
"uuid:24fd9c13-a2b7-4125-ac43-3ca8775cf972","http://resolver.tudelft.nl/uuid:24fd9c13-a2b7-4125-ac43-3ca8775cf972","Zend- en ontvangschakelingen voor een telegrafiesysteem over een mobilofoonnet","Vos, C.; Vreugdenhil, H.","","1972","Ontwerp van zend- en ontvangstschakelingen voor een telegrafie systeem over een mobilofoonnet, waarbij de vaste post selektief berichten kan zenden naar elke gewenste mobiele post. In de gekozen post wordt het bericht afgedrukt met behulp van een mozaïekdrukker.","","nl","student report","","","","","","","","","Applied Sciences","Electrotechniek","","Laboratorium voor automatische verkeerssystemen","",""