Searched for: collection%253Air
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van Oosterom, S.J.M. (author), Mitici, M.A. (author), Hoekstra, J.M. (author)
Following the Paris Accords, the aviation industry aims to become climate neutral by 2050. In this line, electric vehicles that tow aircraft during taxiing are a promising emerging technology to reduce emissions at airports. This paper proposes an end-to-end optimization framework for electric towing vehicles (ETVs) dispatchment at large...
journal article 2023
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Wang, Zhengbing (author), Lodder, Q.J. (author), van der Spek, A.J.F. (author), Slinger, J (author), Hoekstra, Piet (author)
journal article 2023
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Hoekstra, Marissa (author), Van Veenstra, Anne Fleur (author), Bharosa, Nitesh (author)
GovTech, an acronym of Government Technologies, is a novel concept that is gaining attention in the public and private sector. It entails improving the design and delivery of human centric public services and data-driven processes with the use of emerging (digital) technologies. Furthermore, GovTech is concerned with the development of digital...
conference paper 2023
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Roosenbrand, E.J. (author), Sun, Junzi (author), Hoekstra, J.M. (author)
As global flight volume rises, the aviation industry is facing increasing climate challenges. One major factor is the impact of contrails, which trap outgoing terrestrial radiation and counteract emission reduction benefits from emission-optimized flight routes. Our study quantifies contrail-forming flights globally and assesses altitude...
journal article 2023
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Patrinopoulou, Niki (author), Daramouskas, Ioannis (author), Badea, Calin Andrei (author), Morfin Veytia, A. (author), Lappas, Vaios (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Kostopoulos, Vassilios (author)
Unmanned Aircraft Systems (UAS) Traffic Management (UTM) is an active research subject as its proposed applications are increasing. UTM aims to enable a variety of UAS operations, including package delivery, infrastructure inspection, and emergency missions. That creates the need for extensive research on how to incorporate such traffic, as...
journal article 2023
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Bohm, N.L. (author), Hoekstra, M.J. (author), van den Burg, L.P.J. (author), Reincke, M.M.O. (author)
In this case study, we answer the question: what are design characteristics for a personal development line integrated in undergraduate engineering curricula? We investigated the development of such a line in a Bachelor of Architecture, Urbanism and Building Sciences in The Netherlands. We documented and analysed the preparation of and...
conference paper 2023
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Croon, T.M. (author), Hoekstra, J.S.C.M. (author), Dubois, Ute (author)
This report addresses energy poverty in social housing, proposing solutions to aid an inclusive energy transition. It highlights the disproportionate impact of rising prices on vulnerable tenants, suggesting short-term measures like energy advice and energy-saving kits, along with long-term strategies such as prioritising renovations for those...
report 2023
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Croon, T.M. (author), Hoekstra, J.S.C.M. (author), Elsinga, M.G. (author), Dalla Longa, F. (author), Mulder, Peter (author)
Recent energy price spikes have led to increased energy poverty among low-income households living in inefficient homes. Accurate statistics on energy poverty help inform resource allocation and better target relief schemes and retrofit funds. Existing indicators are predominantly defined in terms of a headcount ratio – the share of population...
journal article 2023
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Croon, T.M. (author), Hoekstra, J.S.C.M. (author), Dubois, U. (author)
abstract 2023
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Doole, M.M. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Package delivery via autonomous drones is often presumed to hold commercial and societal value when applied to urban environments. However, to realise the benefits, the challenge of safely managing high traffic densities of drones in heavily constrained urban spaces needs to be addressed. This paper applies the principles of traffic segmentation...
journal article 2022
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Gentili, M. (author), Hoekstra, J.S.C.M. (author)
This report examines the scales and dimensions of inequality in the functional urban area (FUA) of Amsterdam, the Netherlands. Our purpose is to understand how the drivers of socio-economic inequality, and the policies responding to these, operate in this local context. Particular attention is paid to the room for action of local policies and...
report 2022
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Gentili, M. (author), Hoekstra, J.S.C.M. (author)
This report examines the scales and dimensions of inequality in the functional urban area (FUA) of Leuven, in the Flemish region of Belgium. Our purpose is to understand how the drivers of socio-economic inequality, and the policies responding to these, operate in this local context. Particular attention is paid to the room for action of local...
report 2022
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Roosenbrand, E.J. (author), Sun, Junzi (author), Dedoussi, I.C. (author), Stam, D.M. (author), Hoekstra, J.M. (author)
Sustainability is the biggest challenge facing the aerospace industry today. With the global number of flights expected to rise, the climate impact of aviation will continue to increase. Current research states that the rerouting of aircraft through wind-optimisation for the purpose of fuel usage minimisation and emission reduction is an...
conference paper 2022
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Current predictions on future drone operations estimate that traffic density orders of magnitude will be higher than any observed in manned aviation. Such densities redirect the focus towards elements that can decrease conflict rate and severity, with special emphasis on airspace structures, an element that has been overlooked within...
journal article 2022
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Current predictions for future operations with drones estimate traffic densities orders of magnitude higher than any observed in manned aviation. Such densities call for further research and innovation, in particular, into conflict detection and resolution without the need for human intervention. The layered airspace concept, where aircraft...
journal article 2022
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Padmos, R.M. (author), Arrarte Terreros, Nerea (author), Józsa, Tamás I. (author), Závodszky, Gábor (author), Marquering, Henk A. (author), Majoie, Charles B.L.M. (author), Payne, Stephen J. (author), Hoekstra, Alfons G. (author)
The presence of collaterals and high thrombus permeability are associated with good functional outcomes after an acute ischaemic stroke. We aim to understand the combined effect of the collaterals and thrombus permeability on cerebral blood flow during an acute ischaemic stroke. A cerebral blood flow model including the leptomeningeal...
journal article 2022
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Groot, D.J. (author), Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Current estimates show that the presence of unmanned aviation is likely to grow exponentially over the course of the next decades. Even with the more conservative estimates, these expected high traffic densities require a re-evaluation of the airspace structure to ensure safe and efficient operations. One structure that scored high on both the...
conference paper 2022
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Badea, C. (author), Groot, D.J. (author), Morfin Veytia, A. (author), Ribeiro, M.J. (author), Dalmau, Ramon (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Air traffic demand has increased at an unprecedented rate in the last decade (albeit interrupted by the COVID pandemic), but capacity has not increased at the same rate. Higher levels of automation and the implementation of decision-support tools for air traffic controllers could help increase capacity and catch up with demand. The air traffic...
conference paper 2022
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Ribeiro, M.J. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author)
Future high traffic densities with drone operations are expected to exceed the number of aircraft that current air traffic control procedures can control simultaneously. Despite extensive research on geometric CR methods, at higher densities, their performance is hindered by the unpredictable emergent behaviour from surrounding aircraft. In...
journal article 2022
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Morfin Veytia, A. (author), Badea, C. (author), Ellerbroek, Joost (author), Hoekstra, J.M. (author), Patrinopoulou, N. (author), Daramouskas, I. (author), Lappas, V. (author), Kostopoulos, Vassilis (author), de Vries, Vincent (author)
The Metropolis II project aimed to study the impact of centralised separation management for urban aerial mobility. Three concepts were developed in this study: a fully centralised, strategically separated concept, a hybrid concept featuring cen- tralised strategic separation and distributed tactical separation, and a fully distributed tactical...
conference paper 2022
Searched for: collection%253Air
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