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Allaix, D.L. (author), bigaj-van Vliet, A. (author), Cerar, B. (author)Road and railway infrastructure networks form the backbone of European transportation systems, carrying more than 80% of passenger and 50% of goods transport in Europe. Bridges and tunnels which are critical elements of the transport infrastructure networks, have in many cases reached their design service life and keep ageing, with the...conference paper 2022
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Bouquet, F. (author)Controlled, guided munitions can reduce dispersion in the shot, while providing the capability of engaging both stationary and maneuvering targets. The Netherlands Organisation for Applied Scientific Research has developed a fin-less control technology called Stagnation Pressure Reaction Control (SPRC) that takes stagnation pressure air and...article 2022
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Allaix, D.L. (author), Bigaj-van Vliet, A. (author)Aiming to ensure the safety of the transport infrastructure during operation through the improvement of maintenance policies across Europe, the European Commission opened in 2019 the call for the Coordination and Support Action (CSA) “Monitoring and safety of transport infrastructure”. The main goal of this CSA is to support the preparation of a...conference paper 2022
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Heedt, S. (author), Kouwenhoven, L.P. (author)We systematically study three-terminal InSb-Al nanowire devices by using radio-frequency reflectometry. Tunneling spectroscopy measurements on both ends of the hybrid nanowires are performed while systematically varying the chemical potential, magnetic field, and junction transparencies. Identifying the lowest-energy state allows for the...article 2022
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Boorsma, K. (author)To investigate the effects of rotation without the complicating effect of unknown stochastic inflow, wind tunnels have been used for 3D rotating measurements despite their size limitations. Several examples of past experiments and their lessons learned are given, illustrating the challenges with respect to scaling and measurement instrumentation...bookPart 2022
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- Sen, M. (author), Bronsveld, P.C.P. (author), Weeber, A.W. (author) article 2021
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Moehle, C.M. (author), Ke, C.T. (author), Wang, Q. (author), Thomas, C. (author), Xiao, D. (author), Karwal, S. (author), Lodari, M. (author), van de Kerkhof, V. (author), Termaat, R. (author), Gardner, G.C. (author), Scappucci, G. (author), Manfra, M.J. (author), Goswami, S. (author)Topological superconductivity can be engineered in semiconductors with strong spin-orbit interaction coupled to a superconductor. Experimental advances in this field have often been triggered by the development of new hybrid material systems. Among these, two-dimensional electron gases (2DEGs) are of particular interest due to their inherent...article 2021
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Boorsma, K. (author)Wind tunnels have been used extensively by the wind energy community to measure 2D airfoil performance (the subject of 2d Airfoil Measurements). However, despite their size limitations, wind tunnels have also been used for 3D rotating measurements. This allows to investigate the effects of rotation without the com plicating effect of the unknown...bookPart 2021
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Olde, M.C. (author), Wieling, W.P.W. (author), Mores, D. (author), Heuvelink, J. (author), Snel, A.J.M. (author), Lottman, B.B.G. (author)The release of flammable gases inside a traffic tunnel can result in a hazardous atmosphere, potentially leading to explosions. The use of mechanized ventilation and water mist systems for fire protection, could improve the safety of road tunnels in case of accidents or fires by mitigating the explosive area of the released gas. The effects of...conference paper 2020
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Tool, C.J.J. (author), Stodolny, M.K. (author), Anker, J. (author), Janssen, G.J.M. (author), Lenes, M. (author), Romijn, I. (author)A record low surface recombination current for boron doped p+poly-Si passivation on random pyramid textured Cz wafers(Jo,s of 10 fA/cm2) has been achieved, with an outlook to even lower Jo,s values. Solar cells have been completed using a lowcost process flow based on screen-printed and firing-through metallization and with a process flow that...conference paper 2018
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Blanker, J. (author), Vroon, Z.A.E.P. (author), Zeman, M. (author), Smets, A. (author)Copper-indium-gallium-di-selenide (CIGS) is the present record holder in lab-scale thin-film photovoltaics (TF-PV). One of the problems of this PV technology is the scarcity of indium. Multi-junction solar cells allow better spectral utilization of the light spectrum, while the required current generation per layer is much lower, allowing much...conference paper 2018
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Vimalakanthan, K. (author), Boorsma, K. (author)Numerical results for the 4.5 meter diameter wind tunnel tested Mexico rotor have been successfully established with two in-house CFD solvers (SU2 and OpenFoam) using a constant but relatively coarse grid. Still the simulations heavily suffered from limited computation power, in particular for SU2 which could not be parallelised efficiently and...report 2018
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Nelisse, R.M.L. (author), Vrouwenvelder, A.C.W.M. (author)Article 13 of the EU Directive on minimum safety requirements for tunnels in the Trans-European Road Network states that a risk analysis, where necessary, shall be carried out. In the Netherlands, the risk of death for road users in a tunnel is calculated with a model for quantitative risk analysis, which is called “QRA-tunnels”. QRA-tunnels is...conference paper 2017
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Bronkhorst, A.J. (author), Geurts, C.P.W. (author), van Bentum, C.A. (author), van der Knaap, L.P.M. (author), Pertermann, I. (author)An atmospheric boundary layer wind tunnel study was performed to determine the overall horizontal wind load on multi-span duo-pitch greenhouses. The results of this study are intended for the stability design of inflexible Gladding system greenhouses (designated as Class A in EN 13031-1) with roof pitch angles of 23-24' and ridge heights of 7.5...article 2017
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Blanker, J. (author), Vroon, Z. (author), Zeman, M. (author), Smets, A. (author)Copper-indium-gallium-di-selenide (CIGS) is the present record holder in lab-scale thin-film photovoltaics (TFPV). One of the problems of this PV technology is the scarcity of indium. Multi-junction solar cells allow better spectral utilization of the light spectrum, while the required current generation per layer is much lower, allowing much...conference paper 2016
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Smit, S. (author), van der Vecht, B. (author), van Wermeskerken, F.J.P. (author), Streefkerk, J.W. (author)Crime investigators heavily rely on their large knowledge of criminal behavior. When investigating a new case, applying this knowledge can lead to cognitive overload and tunnel vision. Some support systems are developed to search through historical data and knowledge more easily, but still require the investigator to put all the pieces together...conference paper 2016
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Nelisse, R.M.L. (author), Vrouwenvelder, A.C.W.M. (author)Article 13 of the EU Directive on minimum safety requirements for tunnels in the Trans-European Road Network states that a “risk analysis, where necessary, shall be carried out” [1]. In the Netherlands, the risk of death for road users in a tunnel (internal risk) is calculated with a model for quantitative risk analysis, which is called “QRA...conference paper 2016
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Cekli, H.E. (author), Joosten, R.F.D. (author), van de Water, W. (author)We stir wind-tunnel turbulence with an active grid that consists of rods with attached vanes. The time-varying angle of these rods is controlled by random numbers. We study the response of turbulence on the statistical properties of these random numbers. The random numbers are generated by the Gledzer-Ohkitani-Yamada shell model, which is a...article 2015
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Pfahl, A. (author), Randt, M. (author), Meier, F. (author), Zaschke, M. (author), Geurts, C.P.W. (author), Buselmeier, M. (author)The AutoR-project takes a holistic approach to reduce the cost of heliostat fields: Wireless control and energy supply enables to use smaller heliostats which need less steel per mirror area (but usually have high wiring cost). A low cost but high efficient drive system is chosen which reduces energy consumption to a minimum amount and leads to...conference paper 2015
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Weerheijm, J. (author), van der Voort, M.M. (author), Verreault, J. (author), van den Berg, A.C. (author)Tunnel accidents with transports of combustible liquefied gases may lead to explosions. Depending on the substance involved this can be a Boiling Liquid Expanding Vapour Explosion (BLEVE), a Gas Expansion Explosion (GEE) or a gas explosion. Quantification of the risk of these scenarios is important to take informed decisions on tunnel design and...conference paper 2015