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Maas, J.B. (author), van Gent, R.N.H.W. (author), Hoekstra, J.M. (author)Although the main goal of a newly developed Collision Alert Radar is to observe airborne targets, it was found that reflections of the ground are received by the radar. The radar is carried on board of the aircraft, and the ground reflections may be used to detect flight information with respect to the terrain, something which is not possible...conference paper 2020
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Hoekstra, J. (author)The purpose of this paper is to investigate the two-capacitor paradox using circuit models developed in the analysis of circuits that include nanoelectronic single-electron tunneling devices. The two-capacitor paradox, in which it seems that energy is not conserved in a simple circuit consisting of two capacitors in parallel separated by an...journal article 2020
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- Hoekstra, J.S.C.M. (author) review 2020
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)The use of drones for applications such as package delivery, in an urban setting, would result in traffic densities that are orders of magnitude higher than any observed in manned aviation. Current geometric resolution models have proven to be very efficient at relatively moderate densities. However, at higher densities, performance is hindered...conference paper 2020
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Sun, Junzi (author), Hoekstra, J.M. (author)Due to the increasing demands for real-time air traffic monitoring, the 1090 megahertz radio frequency has become the most utilized communication channel for aircraft surveillance purposes. Several services are using the radio frequency at the same time, which are Mode A/C communications and Mode S communications. These different types of...conference paper 2020
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Sun, Junzi (author), Vû, Huy (author), Olive, Xavier (author), Hoekstra, J.M. (author)Mode S surveillance allows air traffic controllers to interrogate certain information from aircraft, such as airspeeds, turn parameters, target altitudes, and meteorological conditions. However, not all aircraft have enabled the same capabilities. Before performing any specific interrogation, the surveillance radar must acquire the transponder...journal article 2020
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)The use of drones for applications such as package delivery, in an urban setting, would result in traffic densities that are orders of magnitude higher than any observed in manned aviation. Current geometric resolution models have proven to be very efficient. However, at the extreme densities envisioned for such drone applications, performance...conference paper 2020
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Zhang, Q. (author), Hoekstra, J.S.C.M. (author)The 2014 hukou reform introduced by the Chinese central government was a turning point in China’s policies towards migration. Different from the previous hukou policies, which were largely exclusionary, the reformed policy encouraged migrants to permanently settle in their destination cities and make use of the public services available there....journal article 2020
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)The use of drones for applications such as package delivery, in an urban setting, would result in traffic densities that are orders of magnitude higher than any observed in manned aviation. Such densities not only make automated conflict detection and resolution a necessity, but it will also force a reevaluation of aspects such as centralised vs...conference paper 2020
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- Hoekstra, M.J. (author), Gramsbergen, E.H. (author) book chapter 2020
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Rooij, R.M. (author), Hoekstra, M.J. (author)Bouwkunde binnen de wetenschappen.book chapter 2020
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Elsinga, M.G. (author), Hoekstra, J.S.C.M. (author), Sedighi, S.M.A. (author), Taebi, B. (author)A perusal of the literature on housing debates reveals that the term ‘value’ is mostly applied to express the financial value of a house and is dealt with in economic literature. However, an alternative meaning of the word ‘value’ in the housing literature can be found in research into the values underlying housing preferences, applying research...journal article 2020
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Sun, Junzi (author), Hoekstra, J.M. (author), Ellerbroek, Joost (author)In air traffic management research, aircraft performance models are often used to generate and analyze aircraft trajectories. Although a crucial part of the aircraft performance model, the aerodynamic property of aircraft is rarely available for public research purposes, as it is protected by aircraft manufacturers for commercial reasons. In...journal article 2020
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Metz, I.C. (author), Ellerbroek, Joost (author), Mühlhausen, Thorsten (author), Kügler, Dirk (author), Hoekstra, J.M. (author)Collisions between birds and aircraft pose a severe threat to aviation and avian safety. To understand and prevent these bird strikes, knowledge about the factors leading to these bird strikes is vital. However, even though it is a global issue, data availability strongly varies and is difficult to put into a global picture. This paper aims...review 2020
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Hoekstra, J.S.C.M. (author)This paper makes a plea for a new form of international comparative housing research, in which not countries (national housing regimes) but cities or regions (local housing regimes) are the unit of analysis. Why do we need such a new comparative research approach? How can a local housing regime be conceptualised? By answering these questions,...journal article 2020
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Gawehn, M.A. (author), van Dongeren, Ap (author), de Vries, S. (author), Swinkels, Cilia (author), Hoekstra, Roderik (author), Aarninkhof, S.G.J. (author), Friedman, Joshua (author)Coastal management in the Netherlands has the aim to defend coastal zones by preventing flooding and mitigating erosion. To that end, large-scale nourishments are placed in the nearshore, which are supposed to dynamically preserve the coastal zone over a timescale of years. To assess their effectiveness, these nourishments are monitored over...journal article 2020
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Sun, Junzi (author), Hoekstra, J.M. (author), Ellerbroek, Joost (author)Air traffic simulations serve as common practice to evaluate different concepts and methods for air transportation studies. The aircraft performance model is a key element that supports these simulation-based studies. It is also an important component for simulation-independent studies, such as air traffic optimization and prediction studies....journal article 2020
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Hoekstra, N. (author), Pellegrini, M. (author), Bloemendal, Martin (author), Spaak, G. (author), Andreu Gallego, A. (author), Rodriguez Comins, J. (author), Grotenhuis, T. (author), Picone, S. (author), Murrell, A. J. (author)Heating and cooling using aquifer thermal energy storage (ATES) has hardly been applied outside the Netherlands, even though it could make a valuable contribution to the energy transition. The Climate-KIC project “Europe-wide Use of Energy from aquifers” – E-USE(aq) – aimed to pave the way for Europe-wide application of ATES, through the...journal article 2020
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Deng, Wen Jing (author), Hoekstra, J.S.C.M. (author), Elsinga, M.G. (author)Worldwide, housing is increasingly unaffordable for young people, many of whom rely on intergenerational transfers of assets to enter home ownership. This paper aims to qualitatively analyze the impacts of the welfare state and family reciprocity on young people's opportunity to access home ownership. Evidence from in-depth interviews with...journal article 2020
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Sun, Junzi (author), Blom, H.A.P. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)This article investigates the estimation of aircraft mass and thrust settings of departing aircraft using a recursive Bayesian method called particle filtering. The method is based on a nonlinear state-space system derived from aircraft point-mass performance models. Using only aircraft surveillance data, flight states such as position,...journal article 2019