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Liebrand, Rens (author), Klapwijk, M.D. (author), Lloyd, Thomas (author), Vaz, Guilherme (author), Lopes, Rui (author)A sensitivity analysis of the transitional flow over a NACA66<sub>2</sub> - 415 foil and the elliptical Arndt wing is carried out. The SST turbulence model is complemented with the ? - Re <sup>~</sup><sub>?t</sub> transition model to determine the effect of varying turbulence intensity and eddy-viscosity ratio on the integral quantities and...conference paper 2019
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Thierschmann, R. (author), Mulazimoglu, E. (author), Manca, N. (author), Goswami, S. (author), Klapwijk, T.M. (author), Caviglia, A. (author)One of the hallmark experiments of quantum transport is the observation of the quantized resistance in a point contact in GaAs/AlGaAs heterostructures. Being formed with split gate technology, these structures represent in an ideal manner equilibrium reservoirs which are connected only through a few electron mode channel. It has been a long...journal article 2018
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Klapwijk, Jeffrey (author)Continuous Climb Operations aim at improving the efficiency of a flight's climb phase by reducing the number of level-offs. The associated fuel-benefits help airlines and airports to comply with future emission demands, rising fuel prices and modernizing airspace requirements. Previously, most studies in this field only considered the effect of...master thesis 2018
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Roël-Looijenga, A. (author), Klapwijk, R.M. (author), de Vries, M.J. (author)In this paper, pupils’ design behaviour is regarded as an expression of active knowledge acquisition. Four cases of building a task structure, which supports effective discovery learning, were investigated. We focus on simple characteristics in a model to explain the effects of the structure on task execution. It reconciles<br/>the advantages of...conference paper 2018
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Effects of Convergent and Divergent Feedback on Creative Thinking During Children’s Design ProcessesSchut, A. (author), Klapwijk, R.M. (author), Gielen, M.A. (author)This paper explores patterns in the feedback preceding instances of design fixation in children (age 9 to 11) carrying out a co-design project. Our goal is to find ways to improve the early mastering of their divergent (DT) and convergent thinking (CT) skills, which in turn will help the children to develop their creative abilities. Previous...conference paper 2018
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Hill, Adrian Vickery (author), Warden, Josie (author), Hausleitner, B. (author), Muñoz Sanz, V. (author), Meyer, Han (author), Croxford, Ben (author), Domenech, Teresa (author), Dellot, Ben (author), Wallace-Stephens, Fabian (author), Vanin, Fabio (author), Orban, Alexandre (author), Gobatto, Federico (author), Macron, Alessandra (author), Klapwijk, A. (author), Nakhlé, Lise (author), Rebreanu, Laura (author)Cities of making assesses the role and current state of manufacturing in three of Europe’s urban centres. Compiled by a consortium of partners in London, Brussels and Rotterdam it forms part of Cities of Making, a thirty-month programme exploring the future of urban based manufacturing in European cities. This report brings together insights...report 2018
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Hausleitner, B. (author), Muñoz Sanz, V. (author), Meyer, Han (author), Klapwijk, Anouk (author)The Cities of Making 'Cities Report', offers an insight into urban manufacturing in three global cities - Brussels, London and Rotterdam. Each city has had a distinctive industrial heritage and is interpreting the future of manufacturing in very different ways. This report exposes unique qualities of each and common trends that may be relevant...book chapter 2018
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Tikhonov, K. S. (author), Skvortsov, M. A. (author), Klapwijk, T.M. (author)We address the problem of nonequilibrium superconductivity in the presence of microwave irradiation. Using contemporary analytical methods, we refine the old Eliashberg theory and generalize it to arbitrary temperatures T and frequencies ω. Microwave radiation is shown to stimulate superconductivity in a bounded region in the (ω,T) plane. In...journal article 2018
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Korneeva, Yuliya (author), Vodolazov, Denis (author), Florya, Irina (author), Manova, Nadegda (author), Smirnov, Eugenii (author), Korneev, Alexander (author), Mikhailov, Michail (author), Goltsman, Gregory (author), Klapwijk, T.M. (author)We experimentally demonstrate the single photon detection in straight micrometer-wide NbN and α-MoSi bridges. Width of the bridges is 2 μm, while the wavelength of the photon changes from 408 to 1550 nm and critical current exceeds 50% of the depairing current. Obtained results offer the alternative route for design of detectors without...journal article 2018
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Westig, M.P. (author), Klapwijk, T.M. (author)A directional superconducting parametric amplifier in the GHz frequency range is designed and analyzed, suitable for low-power read-out of microwave kinetic inductance detectors employed in astrophysics and when combined with a nonreciprocal device at its input also for circuit quantum electrodynamics. It consists of a one-wavelength-long...journal article 2018
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Peltonen, J. T. (author), Coumou, P.C.J.J. (author), Peng, Z. (author), Klapwijk, T.M. (author), Tsai, J. S. (author), Astafiev, O. V. (author)We report development and microwave characterization of rf SQUID (Superconducting QUantum Interference Device) qubits, consisting of an aluminium-based Josephson junction embedded in a superconducting loop patterned from a thin film of TiN with high kinetic inductance. Here we demonstrate that the systems can offer small physical size, high...journal article 2018
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Baeva, E. M. (author), Sidorova, M. V. (author), Korneev, A. A. (author), Smirnov, K. V. (author), Divochy, A. V. (author), Morozov, P. V. (author), Zolotov, P. I. (author), Vakhtomin, Yu B. (author), Klapwijk, T.M. (author)We investigate thermal properties of a NbN single-photon detector capable of unit internal detection efficiency. Using an independent calibration of the coupling losses, we determine the absolute optical power absorbed by the NbN film and, via resistive superconductor thermometry, the temperature dependence of the thermal resistance Z(T) of...journal article 2018
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- Klapwijk, R.M. (author), Gielen, M.A. (author), Schut, A. (author), van Mechelen, M.P.P. (author) book 2018
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Klapwijk, T.M. (author), Semenov, A. V. (author)Superconducting hot-electron bolometers are presently the best performing mixing devices for the frequency range beyond 1.2 THz, where good-quality superconductor-insulator-superconductor devices do not exist. Their physical appearance is very simple: an antenna consisting of a normal metal, sometimes a normal-metal-superconductor bilayer,...journal article 2017
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Bercioux, D (author), Klapwijk, T.M. (author), Bergeret, F. S. (author)We investigate the transport properties of a junction consisting of an electron-hole bilayer in contact with normal and superconducting leads. The electron-hole bilayer is considered as a semimetal with two electronic bands. We assume that in the region between the contacts the system hosts an exciton condensate described by a BCS-like model...journal article 2017
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Klapwijk, Maarten (author)The Royal Netherlands Navy (RNN) operates four diesel-electric submarines, the Walrus class. The submarines sail submerged on electric engines and periodically recharge the batteries with diesel engines at periscope depth. The exhaust gases are dispelled at the back of the sail below water level. During the sea trials it was observed that the...master thesis 2017
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Klapwijk, Anouk (author)With a new scale of operating and constructing large offshore wind farms, harbours and adjacent cities are facing a transition. This transition will include an increase of work migration and temporary citizens within the area. The construction of a wind farm from the port of Vlissingen-Oost will result in a comings and goings of all kind of high...master thesis 2017
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Klapwijk, Anna (author)The increase of data collection and analytics over the past few years the control over personal data has become an important issue. Control over data is the execution of privacy and the ability to protect the individual identity. Solutions to give consumers more control have failed in the past due to security and privacy concerns. On top of that...master thesis 2017
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Titova, Nadezhda (author), Kardakova, Anna I. (author), Tovpeko, Nina (author), Ryabchun, Sergey (author), Mandal, Soumen (author), Morozov, Dmitry (author), Klemencic, Georgina M. (author), Giblin, Sean R. (author), Williams, Oliver A. (author), Goltsman, Gregory N. (author), Klapwijk, T.M. (author)We have measured the electron-phonon energy-relaxation time, τ<sub>eph</sub>, in superconducting boron-doped diamond films grown on silicon substrate by chemical vapor deposition. The observed electron-phonon cooling times vary from 160 ns at 2.70 K to 410 ns at 1.8 K following a T<sup>-2</sup>-dependence. The data are consistent with the...journal article 2017
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Bos, Boy Gustaaf Cornelis (author), Thoen, David (author), Haalebos, E. A.F. (author), Gimbel, P. M.L. (author), Klapwijk, T.M. (author), Baselmans, J.J.A. (author), Endo, A. (author)The superconducting critical temperature (T-\mathrm{c} > 15 K) of niobium titanium nitride (NbTiN) thin films allows for low-loss circuits up to 1.1 THz, enabling on-chip spectroscopy and multipixel imaging with advanced detectors. The drive for large-scale detector microchips is demanding NbTiN films with uniform properties over an...journal article 2017