Searched for: collection%253Air
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Patrinopoulou, N. (author), Daramouskas, I. (author), Lappas, V. (author), Morfin Veytia, A. (author), Badea, C. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), De Vries, V. (author), Van Ham, J. (author)
Metropolis II aims to provide insights in what is needed to enable high-density urban air operations. It does this by investigating the foundation for U-space U3/U4 services. The final goal is to provide a unified approach for strategic deconfliction, tactical deconfliction, and dynamic capacity management. Highly-dense operations in...
conference paper 2022
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Bonifazi, A. (author), Sun, Junzi (author), van Baren, Gerben (author), Hoekstra, J.M. (author)
Not all flight data anomalies correspond to operational safety concerns. But anomalous safety events can be linked to anomalies in flight data. During the final phases of a flight, two significant safety events are unstable approach and goaround. In this paper, using Automatic Dependent Surveillance- Broadcast (ADS-B) data, we develop several...
conference paper 2021
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Graas, R. (author), Sun, Junzi (author), Hoekstra, J.M. (author)
Several initiatives are developed to shift the current paradigm in Air Traffic Management from the tactical-based approach to more strategic-based coordination of flights. This transformation of the ATM system relies on the improvement of predictive models for the 4D flight trajectories. A variety of performance-based and data-driven approaches...
conference paper 2021
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Zhang, Qian (author), Hoekstra, J.S.C.M. (author)
Traditionally, Chinese migrant workers are housed in dormitories or in the private rental sector. In recent years, however, an increasing proportion of the migrant workers has managed to become home owners. This paper further analyzes this trend, which may signify a new phase in the Chinese urbanization process. After a review of the existing...
conference paper 2021
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Arkesteijn, M.H. (author), Jansen, S.J.T. (author), Kieft, B.B.T. (author), Appel-Meulenbroek, Rianne (author), Hoekstra, Bartele (author), Jongens-Vander Schaaf, Pity (author)
Due to the COVID-19 crisis, Dutch employees were told to work from home as much as possible. Homeworking can have benefits both for employees and employers, as some experience a productivity increase and a better work-life balance. However, it is also harder for employers to measure and monitor employees’ performance and for the employee it can...
conference paper 2021
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Doole, M.M. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Drone-based delivery is likely to reduce energy and greenhouse gas emissions associated with the transport of small express packages, fast-food meals and medicines, especially when deployed in large-scale in urban areas. However, it is an enormous challenge to facilitate such high traffic densities in constrained urban environments. A recent...
conference paper 2021
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Badea, C. (author), Morfin Veytia, A. (author), Ribeiro, M.J. (author), Doole, M.M. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Road traffic delay and urban overcrowding are increasing rapidly all over the world. As a result, several companies have proposed the use of small unmanned aerial vehicles (sUAVs) as an alternative to road-based transportation. These small autonomous drones are expected to operate within a thin airspace band (Very Low Level) in high traffic...
conference paper 2021
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Caranti, L. (author), Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
The capacity of the current system of air traffic is rapidly reaching a limit with the increasing demand for air transportation. Expected future traffic densities not only make automated conflict detection and resolution a necessity, but also force a re-evaluation of coordination elements to decrease conflict rate and severity. It has been...
conference paper 2021
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Maas, J.B. (author), Stefanovici, V. (author), van Gent, R.N.H.W. (author), Hoekstra, J.M. (author)
Many pilots in General Aviation use electronic add-ons aids in flight, which rely on satellite navigation information. This navigation information is often a single point of failure which is undesirable since the pilot relies on the information. This paper presents the results of research whether a novel mobile radar station can be used to...
conference paper 2020
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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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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
document
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
document
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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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
document
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
document
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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Ribeiro, 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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