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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
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- Hoekstra, Lenneke (author) master thesis 2019
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Cazaux, S.M. (author), Arribard, Yann (author), Egorov, Dmitrii (author), Palotás, Julianna (author), Hoekstra, Ronnie (author), Berden, Giel (author), Oomens, Jos (author), Schlathölter, Thomas (author)The solar magnetic field (SMF) has historically been considered as dipole in order to build models of the radially expanding corona, that is, the solar wind in the solar minimum. The simplified approach suggests the existence of only one quasi-stationary current sheet (QCS) of solar origin in the heliosphere, namely, the heliospheric current...journal article 2019
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Dol, C.P. (author), Hoekstra, J.S.C.M. (author), Kleinhans, R.J. (author)Rotterdam South is a district where many of the approximately 200,000 residents suffer from a multitude of problems such as low incomes, inadequate professional skills, educational and language deficiencies, unmanageable debts, substance abuse and health/mental problems. Crime has the potential to undermine local society, by luring persons with...report 2019
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Picone, S. (author), Bloemendal, Martin (author), Pellegrini, M. (author), Hoekstra, N. (author), Andreu Gallego, A. (author), Rodriguez Comins, J. (author), Murrel, A. (author)Aquifer Thermal Energy Storage (ATES) system make use of the groundwater to exchange energy with the building: in winter, groundwater is pumped from the warm well to the buildings heat exchanger and the building extracts heat from the groundwater as energy source for the heat pumps, while the groundwater will be injected in the cold well at...conference paper 2019
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Hoekstra, J.S.C.M. (author)International comparative housing research usually takes countries as a unit of analysis. Studies in the field typically connect housing outcomes at the national level to national welfare state and housing regimes. However, as a result of both supranational developments (globalization, financialization, neoliberalization, European Union...conference paper 2019
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Groen, Brenda (author), van der Voordt, Theo (author), Hoekstra, B.S. (author), van Sprang, Hester (author)Purpose: This paper aims to explore the relationship between satisfaction with buildings, facilities and services and perceived productivity support and to test whether the findings from a similar study of Batenburg and Van der Voordt (2008) are confirmed in a repeat study after 10 years with more recent data. Design/methodology/approach:...journal article 2019
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Sun, Junzi (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Open access to flight data from Automatic Dependent Surveillance-Broadcast (ADS-B) has provided researchers with more insights for air traffic management than aircraft tracking alone. With large quantities of trajectory data collected from a wide range of different aircraft types, it is possible to extract accurate aircraft performance...journal article 2019
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Metz, I.C. (author), Mühlhausen, Thorsten (author), Ellerbroek, Joost (author), Kügler, Dirk (author), Hoekstra, J.M. (author)This paper presents a collision avoidance algorithm to prevent bird strikes for aircraft departing from an airport. By using trajectory-information of aircraft and birds, the algorithm predicts potential collisions. Collision avoidance is performed by delaying departing aircraft until they can follow a collision-free trajectory. An...conference paper 2019
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Low carbon heating and cooling by combining various technologies with Aquifer Thermal Energy StoragePellegrini, M. (author), Bloemendal, Martin (author), Hoekstra, N. (author), Spaak, G. (author), Andreu Gallego, A. (author), Rodriguez Comins, J. (author), Grotenhuis, T. (author), Picone, S. (author), Murrell, A. J. (author)A transition to a low carbon energy system is needed to respond to global challenge of climate change mitigation. Aquifer Thermal Energy Storage (ATES) is a technology with worldwide potential to provide sustainable space heating and cooling by (seasonal) storage and recovery of heat in the subsurface. However, adoption of ATES varies strongly...journal article 2019
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Sun, Junzi (author), Vû, Huy (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)The availability of low-cost automatic dependent surveillance-broadcast (ADS-B) receivers has given researchers the ability to make use of large amounts of aircraft state data. This data is being used to support air transportation research in performance study, trajectory prediction, procedure analysis, and airspace design. However, aircraft...journal article 2019
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Sun, Junzi (author), Hoekstra, J.M. (author)A large quantity of Mode S data is being gathered by the OpenSky receiver network every day. Information regarding common flight states, such as position, ground speed, and the vertical rate is broadcast by ADS-B and has already been decoded and made available for researchers via the OpenSky historical database. However, there is still a...conference paper 2019
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Sun, Junzi (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)The Automatic Dependent Surveillance-Broadcast (ADS-B) data has become one of the most popular sources of data for trajectory-based ATM studies. It is can be received in most of the world without restrictions. Extended coverage can be achieved with a network of low-cost receivers and satellites. However, the fact that ADS-B is designed to...conference paper 2019
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Analysis of Conflict Resolution Methods for Manned and Unmanned Aviation Using Fast-Time SimulationsRibeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)In the coming years, aviation will have to cope with an increase in the number of aircraft, and of drones purchased in the open market. The human intervention of Air Traffic Management (ATM) will be overburden with guaranteeing flight safety with hundreds of manned aircraft and Unmanned Aerial Vehicles (UAVs) operating simultaneously. Conflict...conference paper 2019
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Litheko, Olebogeng (author), Marais, Lochner (author), Hoekstra, J.S.C.M. (author), Cloete, Jan (author), Lenka, Molefi (author)Asset-building policies are used worldwide to reduce state welfare commitments. In the Global South, including South Africa, asset-based housing development is thought to help reduce poverty. This study investigated asset building and homeownership in a sample of South Africa’s emerging black middle class. Interviews with 244 black middle-class...journal article 2019
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Kragt, Augustinus J.J. (author), Hoekstra, Davey C. (author), Stallinga, S. (author), Broer, Dirk J. (author), Schenning, Albertus P.H.J. (author)Engineering the helical structure of chiral photonic materials in three dimensions remains a challenge. 3D helix engineered photonic materials are fabricated by local stratification in a photopolymerizable chiral nematic liquid crystal. The obtained chiral photonic materials reflect both handedness of circular polarized light and show super...journal article 2019
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Rudnyk, I. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)To facilitate the increasing amount of air traffic, current and future decision support tools for air traffic management require an efficient and accurate trajectory prediction. With uncertainty inherent to almost all inputs of a trajectory predictor, the accurate prediction is not a simple task. In this study, Monte Carlo simulations of a...journal article 2019
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Hoekstra, Gerald (author)The introduction and obligation of tendering PT (concessions) in Europe has led to more focus on cost-efficiency and contracts. An additional effect in regional PT is the increase of undesirable boundaries between train and bus, e.g. in the form of non-aligned tariffs and bad interchange possibilities. The goal of a multimodal concession is to...master thesis 2018
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Sunil, E. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Maas, J.B. (author)This paper presents analytical models that describe the safety of unstructured and layered en route airspace designs. Here, ‘unstructured airspace’ refers to airspace designs that offer operators complete freedom in path planning, whereas ‘layered airspace’ refers to airspace concepts that utilize heading-altitude rules to vertically separate...journal article 2018
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A. Petrovsky, A. (author), Doole, M.M. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Tomasello, F. (author)The objective of this paper is to raise awareness about the significance of collecting and ensuring the quality of the obstacle data required for the safety of air navigation for both manned and unmanned aviation. This information could be of importance to geodetic, CityGML, 3D model and Building Information Management (BIM) community. With the...conference paper 2018