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van Geest, Jurrian (author)Planning rolling stock maintenance based on prognostic data (Condition Based Maintenance, CBM) is a trend since the ideal timing for maintenance before failure can be planned. With the use of prognostics, a failure can be predicted so Corrective Maintenance (CM) can be avoided. Traditional rolling stock decision-making for Preventive Maintenance...master thesis 2023
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Neeft, Tobias (author)Silicon wafers and solar cells are delicate components used in the semiconductor industries and energy industries. Handling and transportation can easily damage these components. Conventional handling methods with mechanical contact can cause various damages to these delicate surfaces. Air bearings can provide a solution by enabling an almost...master thesis 2023
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Mak, Ho Yi Lydia (author)In the atmospheric boundary layer, when surface heat flux is small and mean wind shear is strong, horizontal convective rolls that are elongated along the wind shear are formed. This study attempts to explain the asymmetry of rolls in terms of turbulence using large-eddy simulations. A pressure gradient in the north-south y direction is applied,...student report 2023
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Fradera Soler, Pau (author)Pollution in urban environments is increasingly becoming a major concern for our societies which, together with the increasingly powerful capabilities provided by computational fluid dynamics (CFD), has made pollution dispersion a common topic of research during the last two decades. Several factors are relevant to the dispersion of pollutants...master thesis 2023
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Li, Tianqi (author), Goverde, R.M.P. (author)The periodic train timetable is one of the most widely used train timetables in passenger railway systems worldwide. However, how to expand well-coordinated daily train services from a single-period timetable pattern is rarely studied. This paper develops a multi-objective mixed integer programming model to solve the periodic train timetable...abstract 2023
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Nikolic, Ksenija (author), Mattos Ferreira, V. (author), Malet, Loïc (author), Depover, Tom (author), Verbeken, Kim (author), Petrov, R.H. (author)The microstructure of a damaged bearing from the field was characterized in this work with the intention to better understand microstructural features behind formation of White Etching Cracks (WEC) in bearings. Microstructural characterization of the altered white etching area (WEA) involved conventional electron backscattered diffraction ...journal article 2023
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van Beek, M.C. (author)Elektronica is een snel groeiende stroom van complex afval in Nederland. De huidige technieken zijn echter niet in staat om dit type afval, bekend als afgedankte elektrische en elektronische apparatuur (AEEA), te behandelen tot het niveau van ruwe materialen dat onze duurzaamheidsdoelen vereisen. Als stap op weg naar dit doel bespreken we hier...journal article 2023
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Li, M. (author), Jiang, X. (author), Carroll, James (author), Negenborn, R.R. (author)The determination of maintenance strategies is subject to complexity and uncertainty arising from variable offshore wind farm states and inaccuracies in model parameters. The most common method in the existing studies is to adopt an open-loop approach to optimize a maintenance strategy. However, this approach lacks the ability to capture...journal article 2023
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Ravi, Gopalakrishnan (author), De Waele, Wim (author), Nikolic, Ksenija (author), Petrov, R.H. (author), Hertelé, Stijn (author)Bearing failure is a cause of concern in a variety of machinery such as turbines, transmissions, drills, engines, etc. It is often associated with rolling contact fatigue (RCF) triggered from damage initiation at non-metallic inclusions (NMI's). Experimental evidence shows that damage initiation lifetime is highly sensitive to the NMI...journal article 2023
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Zhao, X. (author), Huang, Shuangchao (author), Yin, Shan (author), Yang, Jizhong (author), Yang, Z. (author), Tao, Gongquan (author), Wen, Zefeng (author)A time-domain finite element model is developed to study the transient rolling contact of a driving wheelset over a curved track with Low Adhesion Zones (LAZs) shorter than 1.0 m. LAZs on one rail, i.e., unilateral LAZs occurring more likely, is treated for a speed up to 500 km/h. Structural vibrations of wheelset are analyzed to explain the...journal article 2023
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Amoroso, Pedro (author), van Ostayen, R.A.J. (author), Perassi, F. (author)Generally speaking, excessive side thrust and roller slippage are two different aspects affecting cam-roller mechanisms. In novel large-scale hydraulic drivetrains for offshore wind turbines, the highly dynamic nature of these mechanisms combined with the interplay of cyclic loads, frictional torques and inertia promote slippage at the cam...journal article 2023
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Nikolic, Ksenija (author), De Wispelaere, Jelle (author), Ravi, Gopalakrishnan (author), Hertelé, Stijn (author), Depover, Tom (author), Verbeken, Kim (author), Petrov, R.H. (author)Damage in bearings is closely associated with the presence of microstructural alterations, known as white etching areas (WEAs) and white etching cracks (WECs). One of the main reasons for the creation of these microstructural alterations is the presence of defects in the material, such as non-metallic inclusions. Manganese sulfides and...journal article 2023
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Damianakis, N. (author), Yu, Y. (author), Bauer, P. (author)Smart-Charging of Electric Vehicles (EVs) is able to provide frequency regulation capacity services to the System Operator (SO) upon an automation generation control (AGC) signal. While the amount of available regulation capacity is of-fered in the Day-Ahead Market (DAM), there is high uncertainty on the actual amount of reserves that will be...conference paper 2023
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Zhang, M. (author), Arunachalam, Abinaya (author), Perrin, H.R.L. (author), Polat, S. (author), Groenewold, Jan (author), Mendes, E. (author), Eral, H.B. (author)Elevated humidity levels in medical, food, and pharmaceutical products may reduce the products' shelf life, trigger bacterial growth, and even lead to complete spoilage. In this study, we report a humidity indicator that mechanically bends and rolls itself irreversibly upon exposure to high humidity conditions. The indicator is made of two...journal article 2023
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Snieder, J. (author), Dielen, Marc (author), van Ostayen, R.A.J. (author)This work presents the development of a numerical model for the elastohydrodynamic lubrication of roll-to-plate nanoimprinting with flexible stamps. Roll-to-plate nanoimprinting is a manufacturing method to replicate micro- and nanotextures on large-area substrates with ultraviolet-curable resins. The roller is equipped with a relatively soft...journal article 2023
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van Beek, Max (author)In recent decades Europe has been increasing its demand and consumption of electronics. This has in turn resulted in major outflows of waste electronics (WEEE) that are usually not properly dealt with. This is especially the case for low to medium grade printed circuit boards (PCBs) which unlike higher grade electronics such as computers are...master thesis 2022
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Sareen, Anant (author)Steel production is a critical index to measure the infrastructural growth and development of a nation. The steel production capacity of a nation has a significant impact on its GDP. Even though steel rolling has been in the industry since the early 1700s, there have not been significant advancements in its technology space. The safety hazards...master thesis 2022
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Durmuş, Merdan (author)Visible Light Communication (VLC) is becoming an important research area where Visible Light Sources such as LED, Halogen Lamps and even the sun can be used for Wireless Communication. LED-to-Camera Communication is a form of VLC, where the camera can notice intermittent stimuli changes above a certain threshold frequency (flicker fusion...bachelor thesis 2022
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Movva, Kavya (author)To produce an alternative fuel like Methanol from scratch, on a miniature scale- the reactants CO2 and H2O are sourced locally. Zero Emission Fuels B.V. (ZEF) does this by collecting carbon dioxide from the air, via carbon capture techniques and compressing it to high pressure of 55bars. As a consequence of humidity inside the captured CO2,...master thesis 2022
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Lokin, Job (author)In 2018, the International Maritime Organization (IMO) adopted a resolution to reduce the emission of greenhouse gasses of maritime shipping in the near future. A reduction of 50% in CO2-emissions is the goal for the year 2050 in comparison to 2008. Furthermore, the peak in emissions should lie before 2025 and steadily decrease afterwards.<br/...master thesis 2022