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van Leeuwen, Hugo (author)Steel manufacturing is a carbon intensive process, that is responsible for approximately 7% of the total global CO2 emissions. Therefore, TATA Steel IJmuiden aims to lower its carbon emissions. One way to bring down emissions, is to replace the existing blast furnace (BF) CO reduction process with the H2-based direct reduction of iron ore (DRI)....master thesis 2024
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Graas, Adriaan B.M. (author), Wagner, E.C. (author), van Leeuwen, Tristan (author), van Ommen, J.R. (author), Batenburg, K. Joost (author), Lucka, Felix (author), Portela, L. (author)A new X-ray computed tomography technique for the purpose of imaging fluidized beds is presented. It consists of an experimental set-up with three stationary X-ray source and flat panel detector pairs, a geometric calibration and data processing workflow, and an image reconstruction algorithm. The technique enables sparse-angular tomographic...journal article 2024
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van Leeuwen, J.K. (author), Landman, H.M. (author), Groen, Eric L. (author), Mumaw, Randall J. (author), Stroosma, O. (author), van Paassen, M.M. (author), Mulder, Max (author)Previous research indicated a need to improve pilot training with regard to understanding of autopilot logic and behavior, especially in non-routine situations. Therefore, we tested the effect of problem-based exploratory training on pilots’ understanding of autopilot functions. Using a moving-base flight simulator, general aviation pilots (n...journal article 2024
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Diab Montero, H.A. (author), Størksen Stordal, Andreas (author), van Leeuwen, Peter Jan (author), Vossepoel, F.C. (author)Probabilistic forecasts are regarded as the highest achievable goal when predicting earthquakes, but limited information on stress, strength, and governing parameters of the seismogenic sources affects their accuracy. Ensemble data-assimilation methods, such as the Ensemble Kalman Filter (EnKF), estimate these variables by combining physics...working paper 2024
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van Leeuwen, Cato (author)INTRODUCTION: The importance of reusable medical devices is increasingly evident due to their sustainability and accessibility advantages in high- and low- & middle-income countries. In response, LAYCO Medical Devices is developing a reusable vacuum extractor, vela®, as an alternative to the commonly used disposable vacuum extractor. This...master thesis 2023
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van Leeuwen, Sander (author)Language is an intuitive and effective way for humans to communicate. Large Language Models (LLMs) can interpret and respond well to language. However, their use in deep reinforcement learning is limited as they are sample inefficient. State-of-the-art deep reinforcement learning algorithms are more sample efficient but cannot understand...master thesis 2023
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Hiemstra, Jolijn (author), Streefkerk, Luuk (author), Okkerman, Jorrit (author), Rijsenbrij, Annabel (author), van Leeuwen, Jesse (author), Linnebach, Jonathan (author)In a Ghana project, field measurements at the Black Volta aimed to enhance hydrological predictions for the Bui power dam. Validating devices and exploring floodplain contributions, such as with GNSS reflectometry and cameras, provides crucial insights for dam management and model improvement.<br/><br/>In this multidisciplinary project,...student report 2023
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Boot, Cilia (author), Hilmer, Floris (author), Jongkind, Adinda (author), van Leeuwen, Pieter (author), Rosman, Ruben (author)The research question addressed in this study is ”To what extent does the presence of a cloud forest canopy impact the Mestelá River catchment and how will this affect the various involved stakeholders?”. The study aims to investigate the importance of cloud forests in the Mestelá River catchment, Alta Verapaz, Guatemala, related to water...student report 2023
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van Leeuwen, Stach (author)Additive manufacturing technologies are widely gaining more attention, resulting in the development or modification of 3D-printing techniques and materials. At the same time, economical and ecological aspects force the industry to develop materials that are easier and quicker to manufacture, while attaining their desired properties. The...master thesis 2023
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van Breukelen García, Alejandro (author), Cerbino, Filippo (author), Dubois, Justin (author), Esser, Timo (author), Gün, Kerem (author), Jerez, Eduardo (author), Lacal Ip, Daniel (author), van Leeuwen, Roel (author), Olimid, Dominic (author), Smit, Adriaan (author), Stevens, Sebastien (author)The aim of this executive overview is to summarise the content of this extensive report regarding the design of an Landing, Launching and Storage (LLS) system for a soft kite Airborne Wind Energy (AWE) system.<br/>An innovative idea does not translate automatically to financial gain. With new technologies, such as AWEs it is crucial to assess...bachelor thesis 2023
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van Leeuwen, Clint (author)The focus of this project was the research and development of an affective social touch wearable. AffectiveAir uses pneumatic actuation on the shoulder to convey a library of haptic sensations. The goal was to overcome physical limitations in potential digital communication contexts, by a non-verbal, tactile, and possibly intimate social touch...master thesis 2023
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van Leeuwen, Dave (author)The urban tissue of Bressoux, characterized by scars from its architectural and cultural history, presents a unique challenge in terms of revitalization and community integration. This research aims to explore the potential of adaptive strategies and cooperative living as catalysts for mending the urban tissue of Bressoux. The research question...master thesis 2023
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van Leeuwen, Jimi (author)Recently, there has been growing concerns about CO2-emissions, labour dynamics and demand volumes in the Dutch construction industry and industrialised timber constructions have the potential to help solve parts of these challenges. However, relatively little is known about how to identify pathways to adopt industrialised timber construction in...master thesis 2023
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van Leeuwen, David (author)This study assesses the application of graph theory to examine the connectivity of aquatic habitat in the Sliedrechtse Biesbosch and preserve or improve the area’s ecological value. The study addresses the relation between hydrodynamics and ecology, and evaluates different definitions of connectivity. Graph theory provides a novel and promising...master thesis 2023
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van Leeuwen, Lucia (author)The world is facing environmental change, mainly due to human actions. To prevent serious environmental, economic, and societal impacts of climate change, all United Nations Framework Convention on Climate Change (UNFCCC) member countries have committed to limit global temperature increase to 2 degrees Celsius above pre-industrial level by 2050....master thesis 2023
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van Leeuwen, B.A.A. (author), Toubman, Armon (author), van der Pal, Jelke (author), Pool, D.M. (author)Current capabilities for predicting skill retention, i.e., the extent to which human operators retain learned skills over time, at an individual level are limited due to a requirement for large data sets and methods that can extract relevant patterns in highly dimensional data. This paper investigates the application of Extreme Gradient Boosting...conference paper 2023
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- van Leeuwen, B. (author), Bom, S. (author), Kranenburg, W.M. (author), Coonen, M. (author), Muurman, S. (author) abstract 2023
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Vaccaro, D. (author), Akamatsu, H. (author), Gottardi, L. (author), Bruijn, M. P. (author), van der Linden, A. J. (author), van Leeuwen, B. J. (author), van der Hulst, P. (author), de Vries, C. P. (author), Gao, J.R. (author)We report our most recent progress and demonstration of a frequency domain multiplexing (FDM) readout technology for transition-edge sensor (TES) arrays, both of which we have been developing in the framework of the X-IFU instrument on board the future Athena X-ray telescope. Using Ti/Au TES micro-calorimeters, high-Q LC filters and analog...journal article 2023
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Vercruyssen, Tim G.A. (author), Henrion, Sebastian (author), Müller, Ulrike K. (author), van Leeuwen, Johan L. (author), van der Helm, F.C.T. (author)Autonomous robots are used to inspect, repair and maintain underwater assets. These tasks require energy-efficient robots, including efficient movement to extend available operational time. To examine the suitability of a propulsion system based on undulating fins, we built two robots with one and two fins, respectively, and conducted a...journal article 2023
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Valera, Elias Hernandez (author), Cremades, Roger (author), van Leeuwen, Eveline (author), van Timmeren, A. (author)Cities are the core of social interactions and resource consumption in our current times. However, urban systems are still largely based on linear activities in which resources are discarded after usage. Current practices around waste reduce possibilities of circularity, mainly due to low percentages of sorting and recycling practices in high...review 2023