Searched for: subject%3A%22Reductions%22
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Pammi, Sushma (author)
Drag reduction in ships is a key approach to decreasing their energy consumption. Besides saving fuel costs, it also decreases greenhouse gas emissions. One of the most promising techniques for drag reduction in ships is air lubrication, which reduces drag due to friction. Despite its great potential, application of air lubrication in the...
master thesis 2024
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Tanmeet Kaur, Tanmeet (author)
This thesis describes the implementation of a phase-domain readout system for a thermal-diffusivity (TD) based temperature sensor. Such sensors measure the phase shift of an electro-thermal filter (ETF), which exhibits a near-linear dependency on absolute temperature. The phase shift is measured by a phase-domain delta-sigma modulator (PD-DSM)....
master thesis 2024
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van Maldegem, Marijn (author)
The Dutch Ministry of Defence (NLMoD) has stated the goal of reducing dependency on fossil fuels by at least 20% by the year 2030 and at least 70% by the year 2050 compared to the year 2010. Research in the NLMoD explores the possibility of changing diesel-fuelled vehicles and weapon platforms to alternative forms of energy such as electric or...
master thesis 2024
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Floris, Mihnea (author)
<br/>This research contributes to addressing climate change challenges through the examination of hydrogen combustion. It investigates the flow dynamics within a simplified model of Ansaldo Energia's GT36 reheat combustor using Large Eddy Simulation (LES) at a high pressure of 20 bar, focusing on the autoignition flashback phenomena observed....
master thesis 2024
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van Cranenburgh, Tom (author)
With renewed interest in the development of civil supersonic aircraft, their return in the future is becoming more ever more likely. The environmental impact of emissions in the stratosphere on climate and the ozone layer therefore needs to be explored. The stratospheric ozone levels determine the amount of harmful ultraviolet radiation reaching...
master thesis 2024
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Olsthoorn, Joost (author)
Ammonia is a precursor in fertilizer production and a potential carbon-free energy carrier, which is essential for the energy transition to more renewable energy sources. To that end, the current fossil fuel based method of industrial ammonia production through the Haber-Bosch process should be replaced by electrochemical ammonia synthesis....
master thesis 2024
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Bajuk, Jože (author)
This thesis investigates the aerodynamics of two finite wall-mounted cylinders in tandem, focusing on drag reduction as a function of governing parameters.<br/>For the experimental wind tunnel campaign, two measurement techniques were employed: balance measurements and stereoscopic particle image velocimetry. While balance measurements exhibited...
master thesis 2024
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Schmitz, Ruben (author)
To combat global warming, it is crucial to eliminate CO2 emissions by 2050, especially since a third of global emissions are attributed to the building and construction industry. This sector's carbon footprint comprises operational emissions from daily activities and embodied carbon throughout a building's lifecycle. However, as buildings become...
master thesis 2024
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Elders, Bente (author)
Restrictions from the covid pandemic are lifted. However, the office remains changed, the hybrid way of working seems to stick. Employees want flexibility and choose when to work from home and when they work in the office. The norm of a hybrid work week is working three days in the office and two days from home. Resulting in office space that is...
master thesis 2024
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Schilder, Jop (author)
Contrary to conventional wisdom favouring smooth surfaces for drag reduction, the last decades have brought forth different textured surfaces showing drag reduction in turbulent boundary layers, of which riblets are the most studied.<br/>Sirovich and Karlson (1997) introduced a different textured surface named chevron-shaped protrusions,...
master thesis 2024
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Vollebregt, Madeleine (author), Mugge, R. (author), Thürridl, Carina (author), van Dolen, Willemijn (author)
Consumption is often considered important for achieving and maintaining well-being, particularly in current market societies. However, overconsumption is a significant driver of climate issues as it results in material scarcity and carbon emissions. Reduced consumption is one possible solution to environmental problems associated with climate...
review 2024
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Yan, Y. (author), Pargalgauskas, S. (author), Helmons, R.L.J. (author), Schott, D.L. (author)
A convex pattern surface is proposed and optimized to mitigate the sliding wear of bulk handling equipment caused by interaction with bulk solids. This work investigates the effectiveness of the convex pattern surface on wear reduction during interactions with non-spherical particles. Multiple representative particles, obtained through a...
journal article 2024
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Lepri, M. (author), Bacciu, Davide (author), Della Santina, C. (author)
This letter concerns control-oriented and structure-preserving learning of low-dimensional approximations of high-dimensional physical systems, with a focus on mechanical systems. We investigate the integration of neural autoencoders in model order reduction, while at the same time preserving Hamiltonian or Lagrangian structures. We focus on...
journal article 2024
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Butt, E.N. (author), Padding, J.T. (author), Hartkamp, Remco (author)
The local conditions inside a gas diffusion electrode (GDE) pore, especially in the electrical double layer (EDL) region, influence the charge transfer reactions and the selectivity of desired CO<sub>2</sub>ER products. Most GDE computational models ignore the EDL or are limited in their applicability at high potentials. In this work, we...
journal article 2024
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Vilumbrales-Garcia, Rodrigo (author), Kurt, Melike (author), Weymouth, Gabriel D. (author), Ganapathisubramani, Bharathram (author)
The hydrodynamic influence of surface texture on static surfaces ranges from large drag penalties (roughness) to potential performance benefits (shark-like skin). Although it is of wide-ranging research interest, the impact of roughness on flapping systems has received limited attention. In this work, we explore the effect of roughness on the...
journal article 2024
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Groeneboom, P. (author)
We analyze nonparametric estimators for the distribution function of the incubation time in the singly and doubly interval censoring model. The classical approach is to use parametric families like Weibull, log-normal or gamma distributions in the estimation procedure. We propose nonparametric estimates for functions of the observations,...
journal article 2024
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Qiao, Li (author), Zhang, Jing (author), Jiang, Yongjian (author), Ma, Bianqin (author), Chen, Haomin (author), Gao, Peng (author), Zhang, Pengfei (author), Wang, Anming (author), Sheldon, R.A. (author)
Effective photolytic regeneration of the NAD(P)H cofactor in enzymatic reductions is an important and elusive goal in biocatalysis. It can, in principle, be achieved using a near-infrared light (NIR) driven artificial photosynthesis system employing H<sub>2</sub>O as the sacrificial reductant. To this end we utilized TiO<sub>2</sub>/reduced...
journal article 2024
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Moukarzel, Sara (author), Zlatar, Zvinka Z. (author), Hartman, Sheri J. (author), Lomas, J.D. (author), Feldman, Howard H. (author), Banks, Sarah J. (author)
INTRODUCTION: With Alzheimer's disease and related dementias (ADRD) representing an enormous public health challenge, there is a need to support individuals in learning about and addressing their modifiable risk factors (e.g., diet, sleep, and physical activity) to prevent or delay dementia onset. However, there is limited availability for...
journal article 2024
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Diaz, Nicholas D. (author), Lee, Yoonjeong (author), Kothuis, B.L.M. (author), Pagán-Trinidad, Ismael (author), Jonkman, Sebastiaan N. (author), Brody, Samuel D. (author)
Floods are consistently ranked as the most financially devastating natural disasters worldwide. Recent flood events in the Netherlands, Caribbean, and US have drawn attention to flood risks resulting from pluvial and fluvial sources. Despite shared experiences with flooding, these regions employ distinct approaches and flood management...
journal article 2024
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Lara, Manuel (author), Mulders, S.P. (author), van Wingerden, J.W. (author), Vázquez, Francisco (author), Garrido, Juan (author)
Individual pitch control (IPC) is a method to mitigate periodic blade loads in wind turbines, and it is typically implemented using the multi-blade coordinate (MBC) transform, which converts the blade load measurements from a rotating frame into the non-rotating tilt axis and yaw axis. Previous studies have shown that by including an...
journal article 2024
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