- document
-
Hoekstra, J.S.C.M. (author), Elsinga, M.G. (author), Haffner, M.E.A. (author), Dol, C.P. (author)This Annex together with the final report present the results of the research project “Promoting the contribution of private savings to pension adequacy: Integrating residential property with private pensions in the EU” led by iff, institute for financial services, Hamburg. Financial support by the European Commission, DG Employment, Social...report 2018
- document
-
Doole, M.M. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)The concept of autonomous drone delivery in urban areas has gained a favorable amount of media attention over the past few years. Companies such as Amazon, Uber and Matternet are investigating the use of drones to transport parcels in order to solve the disaggregate delivery (last-mile) problem. This solution could potentially reduce vehicular...conference paper 2018
- document
-
Maas, J.B. (author), van Gent, R.N.H.W. (author), Hoekstra, J.M. (author)Object tracking is performed when surveillance applications have multiple observations of an object over time. An example of such a surveillance application is mounting a wideangle Frequency Modulated Continuous Wave (FMCW) radar system on board of a General Aviation aircraft. This is done in order to observe its environment in detail, including...conference paper 2018
- document
-
Metz, I.C. (author), Muhlhausen, Thorsten (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Bird strikes have the potential to cause severe damage to aircraft. Therefore, measures to reduce the risk of bird strikes are performed at airports. However, this risk is not limited to the airport but is increased in the arrival and departure corridors as well. Consequently, a significant amount of bird strikes occurs outside the direct...abstract 2018
- document
-
Sun, Junzi (author), Blom, H.A.P. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)This paper focuses on estimating aircraft mass and thrust setting 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 solely ADS-B and Mode-S data, flight states such as position, velocity, and wind speed are collected and...conference paper 2018
- document
-
Sunil, E. (author), Þórđarson, Olafur (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Decentralized en-route airspace concepts have been proposed by many studies to increase airspace safety and capacity. Most of these studies, including our own forays into this domain, have used fast-time simulation experiments to explore the benefits offered by decentralization. While simulations are indispensable during the initial design phase...conference paper 2018
- document
-
Ellerbroek, Joost (author), Inaad, Mazin (author), Hoekstra, J.M. (author)This paper presents an analysis of the potential fuel and emission benefits of implementing Continuous Descent Operations at Schiphol International Airport, from cruise altitude to the final approach fix, for a large scope of aircraft types. Using historical data from on-board sources and ADS-B, fuel-optimal continuous descents are simulated...conference paper 2018
- document
-
Hoekstra, J.M. (author), Ellerbroek, Joost (author), Sunil, E. (author), Maas, J.B. (author)Both U-space in Europe, as well as UTM in the USA, develop concepts and tools for UAV airspace. Enabling highdensity operations is one of the goals of these studies. Past and recent studies have analysed which factors affect the capacity of a UAV airspace. An improved understanding of this can lead to control methods for capacity management. Two...conference paper 2018
- document
-
Sunil, E. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)This paper presents a semi-empirical method to determine the maximum theoretical capacity of decentralized airspace concepts. The method considered here, named Capacity Assessment Method for Decentralized ATC (CAMDA), formalizes an earlier approach described in literature, extends it for threedimensional airspace, and also improves the accuracy...conference paper 2018
- document
-
Metz, I.C. (author), Muhlhausen, Thorsten (author), Ellerbroek, Joost (author), Kügler, Dirk (author), van Gasteren, Hans (author), Kraemer, Jan (author), Hoekstra, J.M. (author)Annually, thousands of birds collide with aircraft. The impact usually has lethal<br/>consequences for the bird, the involved aircraft can experience severe damage. The highest bird strike risk occurs at low altitudes. Therefore, aircraft within the airport area as well as the adjacent approach and departure corridors are especially vulnerable...journal article 2018
- document
-
Dol, C.P. (author), Hoekstra, J.S.C.M. (author)The ageing of European societies and increasing pressure on collective pension arrangements has sparked interest in alternative, more individualised forms of pension provision. Home ownership is regarded as one of these alternatives. Home owners can release housing equity by moving to a smaller owner occupied dwelling or a rental dwelling....conference paper 2018
- document
-
van Driel, B.A. (author), Artesani, A. (author), van den Berg, K.J. (author), Dik, J. (author), Mosca, S. (author), Rossenaar, B. (author), Hoekstra, J. (author), Davies, A. (author), Nevin, A. (author), Valentini, G. (author), Comelli, D. (author)This work reports the analysis of the time-resolved photoluminescence behaviour on the nanosecond and microsecond time scale of fourteen historical and contemporary titanium white pigments. The pigments were produced with different production methods and post-production treatments, giving rise to a remarkable variability of titanium dioxide...journal article 2018
- document
-
Sun, Junzi (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)Aircraft mass is a crucial piece of information for studies on aircraft performance, trajectory prediction, and many other topics of aircraft traffic management. However, It is a common challenge for researchers, as well as air traffic control, to access this proprietary information. Previously, several studies have proposed methods to estimate...journal article 2018
- document
-
Hoekstra, M. (author), Geilvoet, Stefan P. (author), Hendrickx, Tim L.G. (author), van Erp Taalman Kip, Charlotte S. (author), Kleerebezem, R. (author), van Loosdrecht, Mark C.M. (author)The aim of this research was to study the biological feasibility of the Partial Nitritation/Anammox (PN/A) technology to remove nitrogen from municipal mainstream wastewaters. During stable process operations at summer temperatures (23.2 ± 1.3°C), the total nitrogen removal rate was 0.223 ± 0.029 kg N (m<sup>3 </sup>d)<sup>−1</sup> while at...journal article 2018
- document
- Rudnyk, I. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author) conference paper 2018
- document
- Rudnyk, I. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author) conference paper 2018
- document
-
Gentili, M. (author), Hoekstra, J.S.C.M. (author)According to basic economics, when vacancy rates rise, house prices should decrease and vice versa, responding to supply and demand mechanisms. However, previous studies have observed that, before the economic crisis, this was not the case in Spain and Malta. It has been questioned whether this paradox is a Mediterranean phenomenon or simply the...journal article 2018
- document
-
Bekkering, H.C. (author), Hoekstra, M.J. (author), Rooij, R.M. (author), Wagenaar, C. (author), Zeinstra, J.S. (author)As part of the renewal in 2013/2014 of the bachelor education curriculum in the Faculty of Architecture and the Built Environment, Delft University of Technology, a new study programme was prepared on the Fundamentals (in Dutch: Grondslagen) of spatial design. The teaching approach, visually presented by some examples and explained in this...journal article 2018
- document
-
Deng, W. (author), Hoekstra, J.S.C.M. (author), Elsinga, M.G. (author)After three decades of housing reform in China, housing assets constitute a sizable share of family wealth but are distributed unevenly, as registered homeowners are predominantly male. This is partly because males generally have higher incomes than females and can therefore contribute more to the financing, but also because males receive more...journal article 2018
- document
-
Marais, Lochner (author), Hoekstra, J.S.C.M. (author), Napier, Mark (author), Cloete, Jan (author), Lenka, Molefi (author)Under apartheid, black African households could not own land or homes in most major urban centres in South Africa. This limited residential mobility and locked many households into state rental accommodation in townships. Homeownership for all South Africans was restored in the mid-1980 s and the Group Areas Act was repealed in 1991.<br/...journal article 2018