- document
-
Dol, C.P. (author), Mazo, Estrella Cruz (author), Lambea Llop, N. (author), Hoekstra, J.S.C.M. (author), Cano Fuentes, G.I. (author), Etxarri, Aitziber Etxezarreta (author)The Spanish home ownership sector has been hit hard by the economic crisis. Repossessions stand at around half a million in the period from 2008 to 2014. This article investigates how the authorities, both at the level of the Spanish state and of the autonomous communities (regions), have responded to this problem. We investigated whether...journal article 2016
- document
-
Metz, I.C. (author), Hoekstra, J.M. (author), Ellerbroek, Joost (author), Kugler, D. (author)The BlueSky Open Air Tra_c Simulator developed by the Control & Simulation section of TU Delft aims at supporting research for analysing Air Tra_c Management concepts by providing an open source simulation platform. The goal of this study was to complement BlueSky with aircraft performance models in order to enable performance- related Air...conference paper 2016
- document
-
Hoekstra, J.S.C.M. (author), Marais, L (author)Subsidised housing often creates a segmented housing market, with some home owners falling into a gap between the subsidised and non-subsidised types. This gap particularly affects middle-income buyers, whose income may be too high to qualify for subsidy but too low to buy a non-subsidised house. Western Europe has policies and affordable...journal article 2016
- document
-
Langejan, T.P. (author), Sunil, E. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Most Free-Flight concepts rely on self-separation by means of airborne Conflict Detection and Resolution (CD&R) algorithms. A key enabling technology for airborne CD&R is the Automatic Dependent Surveillance-Broadcast (ADS-B) system, which is used for direct state information exchange between aircraft. Similar to other communication...conference paper 2016
- document
-
Nijhuis, S. (author), Stolk, E.H. (author), Hoekstra, M.J. (author)The Department of Urbanism at the Faculty of Architecture and Built Environment at the Delft University of Technology has a long tradition in educating generations of internationally oriented designers, planners and researchers in urbanism. Here the domain of urbanism is defined as an interdisciplinary approach that engages in real-world...journal article 2016
- document
-
Poot, Vincent (author), Hoekstra, M. (author), Geleijnse, M.A.A. (author), van Loosdrecht, Mark C.M. (author), Pérez, Julio (author)Partial nitritation was stably achieved in a bench-scale airlift reactor (1.5L) containing granular sludge. Continuous operation at 20 °C treating low-strength synthetic wastewater (50 mg N-NH<sub>4</sub> <sup>+</sup>/L and no COD) achieved nitrogen loading rates of 0.8 g N-NH<sub>4</sub> <sup>+</sup>/(L·d) during partial nitritation. The...journal article 2016
- document
-
Jenie, Y.I. (author), van Kampen, E. (author), de Visser, C.C. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)This paper proposes a novel avoidance method called the three-dimensional velocity obstacle method. The method is designed for unmanned aerial vehicle applications, in particular to autonomously handle uncoordinated multiple encounters in an integrated airspace, by exploiting the limited space in a three-dimensional manner. The method is a three...journal article 2016
- document
-
Jenie, Y.I. (author), van Kampen, E. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)This paper proposes a taxonomy of Conflict Detection and Resolution (CD&R) approaches for Unmanned Aerial Vehicles (UAV) operation in an integrated airspace. Possible approaches for UAVs are surveyed and broken down based on their types of surveillance, coordination, maneuver, and autonomy. The factors are combined back selectively, with...journal article 2016
- document
- Jenie, Y.I. (author), van Kampen, E. (author), de Visser, C.C. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author) conference paper 2016
- document
-
Droste, B. (author), Van Gent, R. (author), Straathof, M. (author), Steenhuizen, D. (author), Kotsonis, M. (author), Geuskens, F. (author), Shroff, S. (author), Guerriero, G. (author), Gangoli Rao, A. (author), Lada, C. (author), Dewanji, D. (author), Yu, H. (author), Schroijen, M. (author), Hoekstra, J. (author), The CleanEra Team (author)The CleanEra project was initiated with the goal of developing revolutionary ideas for civil aviation. These ideas were to offer solutions which would limit and reduce some of the negative aspects of aviation, namely: emissions and the use of resources. This book presents you with the highlights of this journey in search of new technologies for...book 2015
- document
-
Hoekstra, M.J. (author), Rooij, R.M. (author)In de wandelgangen van de faculteit komt de toekomstige internationalisering regelmatig voorbij. Om in een later stadium daadwerkelijk beslissingen te kunnen maken over de verengelsing van de bachelor, is discussie nodig. Eerder publiceerde Bnieuws een gesprek tussen Directeur Onderwijs Roberto Cavallo en toenmalig voorzitter van de Facultaire...journal article 2015
- document
-
Jenie, Y.I. (author), Van Kampen, E.J. (author), De Visser, C.C. (author), Ellerbroek, J. (author), Hoekstra, J.M. (author)Autonomous systems are required in order to enable UAVs to conduct self-separation and collision avoidance, especially for flights within the civil airspace system. A method called the Velocity Obstacle Method can provide the necessary situational awareness for UAVs in a dynamic environment, and can help to generate a deconflicting maneuver.This...conference paper 2015
- document
-
Conflict detection and resolution system architecture for unmanned aerial vehicles in civil airspaceJenie, Y.I. (author), van Kampen, E.J. (author), Ellerbroek, J. (author), Hoekstra, J.M. (author)A novel architecture for a general Unmanned Aerial Vehicle (UAV) Conflict Detection and Resolution (CD&R) system, in the context of their integration into the civilian airspace, is proposed in this paper. The architecture consists of layers of safety approaches ,each representing a combination of different methods for surveillance, coordination,...conference paper 2015
- document
-
Sunil, E. (author), Hoekstra, J.M. (author), Ellerbroek, J. (author), Bussink, F. (author), Nieuwenhuisen, D. (author), Vidosavljevic, A. (author), Kern, S. (author)Personal and unmanned aerial vehicles have received increasing media attention over the last decade. As a result of the growing excitement for these two aircraft types, many within and outside the aerospace industry envision a future in which large numbers of small aircraft fly over urban areas. With this vision for the future, the question...conference paper 2015
- document
-
Brinkman, W.P. (author), Hoekstra, A.R.D. (author), Van Egmond, R. (author)Three studies were conducted to examine the effect of audio on people's experience in a virtual world. The first study showed that people could distinguish between mono, stereo, Dolby surround and 3D audio of a wasp. The second study found significant effects for audio techniques on people's self-reported anxiety, presence, and spatial...conference paper 2015
- document
-
Arntzen, M. (author), Aalmoes, R. (author), Bussink, F. (author), Sunil, E. (author), Hoekstra, J.M. (author)The development of Personal aerial vehicles and unmanned aerial vehicles are expected to have a considerable influence on the development of future airspace design around large cities. In the Metropolis project, four different concepts for airspace design are assessed for a (metropolitan) city of the future. The different noise impact on the...conference paper 2015
- document
-
Elsinga, M.G. (author), Haffner, M.E.A. (author), Hoekstra, J.S.C.M. (author)Onderzoek uitgevoerd in opdracht van Platform 31 (in samenwerking met Corpovenista en het Ministerie van Binnenlandse Zaken en Koninkrijksrelaties).report 2015
- document
-
Haffner, M.E.A. (author), Hoekstra, J.S.C.M. (author), Tang, C. (author), Oxley, M. (author)In the United Kingdom, social landlords are facing decreasing governmental financial support for them to fulfil their role in the provision of social housing, which has led to increasing pressure on them to rely on private capital. Traditionally, bank loans were the main source of private capital, but after the Global Financial Crisis (GFC) and...conference paper 2015
- document
-
Etxezarreta Etxarri, A. (author), Hoekstra, J.S.C.M. (author), Cano Fuentes, G. (author), Cruz Mazo, E. (author), Dol, C.P. (author)The main purpose of this paper is to offer a new theoretical framework to the Spanish housing studies. This article combines different traditions and different frameworks (social innovation, social economy), in order to position the crisis of evictions in Spain and the emergence of housing co-operatives in a new theoretical context. In the first...conference paper 2015
- document
-
Deng, W. (author), Hoekstra, J.S.C.M. (author), Elsinga, M.G. (author)This paper reviews the housing policy of China from 1949-2013. It examines the housing tenure change, policy instruments, and impacts social structures in different time periods. After the welfare period of 1949-77, the dual provision period of 1978-1998, and the market dominant period of 1999-2011, China’s housing policy was again reformed...report 2015