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Metz, I.C. (author), Ellerbroek, Joost (author), Muhlhausen, Thorsten (author), Kügler, D. (author), Hoekstra, J.M. (author)
This paper presents a fast-time simulation environment for assessing the risk of bird strikes in aviation. An existing air traffic simulator was enhanced in order to simulate air and bird traffic simultaneously and to recognize collisions between birds and aircraft. Furthermore, a method was developed to generate bird movement information from...
conference paper 2017
document
Sunil, E. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Arntzen, M. (author)
The work that is presented in this paper is part of an ongoing study on the relationship between airspace structure and capacity. The present paper investigates the degree of structuring needed to maximize capacity for decentralized en-routeairspace. To this end, four decentralized en-route airspace concepts,...
journal article 2017
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Hoekstra, J.S.C.M. (author)
The Dutch social rental sector often serves as an example for other countries as a result of its large share and good quality housing. However, many things have changed in the sector in recent years. After 2011, the central government has regained its control over the housing associations. This was needed after the unacceptable amount of...
journal article 2017
document
Jansen, S.J.T. (author), Hoekstra, J.S.C.M. (author), Boumeester, H.J.F.M. (author)
The extraction of natural gas in the north of The Netherlands has led to soil subsidence and the occurrence of earthquakes. Residents worry about the safety of their families and the saleability of their dwelling and might want to move. The goal is to examine whether the earthquakes are related to the intention to move. A survey among...
journal article 2017
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van Ginkel, D.H. (author), van Bortel, G.A. (author), Hoekstra, J.S.C.M. (author)
report 2016
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Haffner, M.E.A. (author), Hoekstra, J.S.C.M. (author), Tang, C. (author), Oxley, M (author)
journal article 2016
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Pietra, F. (author), De Trizio, L. (author), Hoekstra, Anne W. (author), Renaud, N. (author), Prato, Mirko (author), Grozema, F.C. (author), Baesjou, Patrick J. (author), Koole, Rolf (author), Manna, L. (author), Houtepen, A.J. (author)
Colloidal quantum dots (QDs) show great promise as LED phosphors due to their tunable narrow-band emission and ability to produce high-quality white light. Currently, the most suitable QDs for lighting applications are based on cadmium, which presents a toxicity problem for consumer applications. The most promising cadmium-free candidate QDs...
journal article 2016
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Boelhouwer, P.J. (author), Boumeester, H.J.F.M. (author), Groetelaers, D.A. (author), Hoekstra, J.S.C.M. (author), van der Heijden, H.M.H. (author), Jansen, S.J.T. (author), Korthals Altes, W.K. (author), de Wolff, H.W. (author), Simon, C (author), de Haan, F (author), Grisnich, F (author), Ringersma, R (author)
report 2016
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Hobo, C (author), Grashof, AH (author), Hoekstra, J.S.C.M. (author)
report 2016
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Hoekstra, J.S.C.M. (author)
In alle negen gemeenten van het aardbevingsgebied hebben de aardbevingen een duidelijke invloed op het wonen en het woongenot. In het hele gebied ervaren de bewoners duidelijk de negatieve gevolgen van de aardbevingsproblematiek. Hierbij gaat het niet alleen om de concrete fysieke effecten van de aardbevingen (schade aan de woning), maar ook om...
report 2016
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Hoekstra, J.S.C.M. (author)
report 2016
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Sun, Junzi (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
With the increasing availability of ADS-B transponders on commercial aircraft, as well as the rapidly growing deployment of ground stations that provide public access to their data, accessing open aircraft flight data is becoming easier for researchers. Given the large number of operational aircraft, significant amounts of flight data can be...
conference paper 2016
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Sun, Junzi (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Aircraft mass is an important parameter in many ways, either to build aircraft performance models, to predict flight trajectories, or to simulate air traffic. Mass data is usually considered as sensitive information for airlines and is, therefore, not disclosed to researchers publicly. In this paper, we use two methods to infer the mass of an...
conference paper 2016
document
Metz, I.C. (author), Mühlhausen, T (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Bird strikes have operational impacts and cause economic loss to the aviation industry. In the worst case, the damages resulting from bird strikes lead to crashes. The highest risk for bird strikes lies in the area below 3000 ft and thus mainly in airport environments. Despite intense efforts from the airports in controlling the local bird...
conference paper 2016
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Metz, I.C. (author), Ellerbroek, Joost (author), Mühlhausen, T (author), Kügler, D. (author), Hoekstra, J.M. (author)
poster 2016
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Hoekstra, J.M. (author), Ellerbroek, Joost (author)
To advance ATM research as a science, ATM research results should be made more comparable. A possible way to do this is to share tools and data. This paper presents a project that investigates the feasibility of a fully open-source and open-data approach to air traffic simulation. Here, the first of the two main challenges is to achieve a high...
conference paper 2016
document
Hoekstra, J.M. (author), Maas, J.B. (author), Tra, M.A.P. (author), Sunil, E. (author)
In many ATM studies experiments are performed to determine the capacity. This paper looks at the effect of airspace design on the capacity. Using an algebraic approach a relation is derived between the design parameters of a layered airspace design and the capacity of the airspace. The validity of the assumptions which are used in this...
conference paper 2016
document
Maas, J.B. (author), Sunil, E. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Tra, M.A.P. (author)
Several conflict resolution algorithms for airborne self-separation rely on principles derived from the repulsive forces that exist between similarly charged particles. This research investigates whether the performance of the Modified Voltage Potential algorithm, which is based on this algorithm, can be improved using bio-inspired swarming...
conference paper 2016
document
Sunil, E. (author), Maas, J.B. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Tra, M.A.P. (author)
The work that is presented in this paper is part of an ongoing study on the relationship between structure and capacity of decentralized airspace concepts. In this paper, the effect of traffic stability, which considers the occurrence of conflict chain reactions as a result of conflict resolution maneuvers, on capacity is examined closely. Using...
conference paper 2016
document
Sunil, E. (author), Hoekstra, J.M. (author), Ellerbroek, Joost (author), Bussink, F (author), Vidosavljevic, A (author), Nieuwenhuisen, D (author)
Airspace structure can be used as a procedural mechanism for a priori separation and organization of en-route air traffic. Although many studies have explored novel structuring methods to increase en-route airspace capacity, the relationship between the level of structuring of traffic and airspace capacity is not well established. To better...
conference paper 2016
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