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Vos, J. (author)
This dissertation explores what road characteristics trigger drivers’ speed adjustments when approaching freeway curves. It combines speed prediction modelling and human factors research methods. The results show that drivers primarily consider visible cues such as the preceding roadway, deflection angle, and the number of lanes, as opposed to...
doctoral thesis 2024
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Vos, G.M. (author)
This thesis deals with multipliers and transference on noncommutative Lp-spaces. It falls within the realm of noncommutative harmonic analysis, i.e. harmonic analysis on noncommutative spaces. Such spaces appear in several areas of mathematics, such as non-abelian groups, quantum groups, noncommutative geometry and the general theory of operator...
doctoral thesis 2024
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Laar, Y.A. (author), Atherstone, D.M. (author), Benad, J. (author), Vos, Roelof (author)
The Flying V is a long-range, flying-wing aircraft where payload and fuel both reside in a V-shaped, crescent wing with large winglets that double as vertical tail planes. The objective of this study is to maximize the lift-to-drag (L/D) ratio of the Flying V in cruise conditions, i.e. CL= 0.26, M = 0.85 and to investigate its off-design...
conference paper 2024
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de Vries, R. (author), Wolleswinkel, Rob E. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)
Battery-electric aviation is commonly believed to be limited to small aircraft and is therefore expected have a negligible impact on the decarbonization of the aviation sector. In this paper we argue that, with the correct choice of design parameters and top-level aircraft requirements, the addressable market is actually substantial. To...
conference paper 2024
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Wolleswinkel, Rob E. (author), de Vries, R. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)
Thus far, battery-electric propulsion has not been considered a promising pathway to climate-neutral aviation. Given current and expected battery technology, in most literature battery-electric aircraft are only considered feasible for short ranges (< 400 km) and small payloads (< 19 pax). As a result, battery-electric aircraft development...
conference paper 2024
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Hopf, Y.M. (author), Simoes dos Santos, D. (author), Ossenkoppele, Boudewine W. (author), Noothout, E.C. (author), Chang, Z.Y. (author), Chen, Chao (author), Vos, H.J. (author), Verweij, M.D. (author), de Jong, N. (author), Pertijs, M.A.P. (author)
This article presents an application-specific integrated circuit (ASIC) for catheter-based 3-D ultrasound imaging probes. The pitch-matched design implements a comprehensive architecture with high-voltage (HV) transmitters, analog front ends, hybrid beamforming analog-To-digital converters (ADCs), and data transmission to the imaging system....
journal article 2024
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Simoes dos Santos, D. (author), Ossenkoppele, B.W. (author), Hopf, Y.M. (author), Soozande, Mehdi (author), Noothout, E.C. (author), Vos, H.J. (author), Bosch, Johan G. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author), de Jong, N. (author)
Objective: Described here is the development of an ultrasound matrix transducer prototype for high-frame-rate 3-D intra-cardiac echocardiography. Methods: The matrix array consists of 16 × 18 lead zirconate titanate elements with a pitch of 160 µm × 160 µm built on top of an application-specific integrated circuit that generates transmission...
journal article 2024
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Kortenbout, A.J. (author), Costerus, Sophie (author), Dudink, Jeroen (author), de Jong, N. (author), de Graaff, Jurgen C. (author), Vos, H.J. (author), Bosch, Johan G. (author)
Objective: Post-operative brain injury in neonates may result from disturbed cerebral perfusion, but accurate peri-operative monitoring is lacking. High-frame-rate (HFR) cerebral ultrasound could visualize and quantify flow in all detectable vessels using spectral Doppler; however, automated quantification in small vessels is challenging...
journal article 2024
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Simoes dos Santos, D. (author), Baldini, L.B. (author), Vos, H.J. (author), Verweij, M.D. (author), de Jong, N. (author), van Neer, P.L.M.J. (author)
The accurate determination of the transfer function of ultrasound transducers is important for their design and operational performance. However, conventional methods for quantifying the transfer function, such as hydrophone measurements, radiation force balance, and pulse-echo measurements, are costly and complex due to specialized equipment...
journal article 2024
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Saez Ortuño, M.A. (author), Yin, F. (author), Gangoli Rao, A. (author), Vos, Roelof (author), Proesmans, P. (author)
As climate change aggravates, the aviation sector strives to minimize its climate footprint. To this end, international organizations, such as ICAO and ACARE, are promoting mitigation measures including novel technologies, operations, and energy carriers to reduce aircraft emissions significantly. Hydrogen (H2) as an alternative fuel has the...
conference paper 2023
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Joosten, S.K.B. (author), Stroosma, O. (author), Vos, Roelof (author), Mulder, Max (author)
Flying wings are known for their limited lateral-directional stability and handling qualities. This study aims at assessing the lateral-directional handling qualities of a conceptual flying wing aircraft currently in development at TU Delft, the Flying-V, in a moving-base flight simulator. It focuses on two aspects: First assess the lateral...
conference paper 2023
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Vugts, G. (author), Stroosma, O. (author), Vos, Roelof (author), Mulder, Max (author)
A novel aircraft configuration, the tailless Flying-V, is examined for its longitudinal handling qualities in cruise by means of piloted simulations. The Flying-V is controlled by two aileron/elevator (elevon) surfaces on each side, and rudders on each wingtip. Two control allocation schemes were created: a conventional one where both inboard...
conference paper 2023
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Torelli, R. (author), Stroosma, O. (author), Vos, Roelof (author), Mulder, Max (author)
An improved understanding of pilot’s control behavior adaptations in response to sudden changes in the vehicle dynamics is essential for realizing adaptive support systems that remain effective when task characteristics suddenly change. In this paper, we replicate, extend, and validate the ‘adaptive pilot model’ proposed by Hess to verify its...
conference paper 2023
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de Winter, J.C.F. (author), Koelmans, T.A. (author), Kokshoorn, M.H.J.L. (author), van der Valk, K.P. (author), Vos, Willem (author), Dodou, D. (author), Eisma, Y.B. (author)
Chunking theory and previous eye-tracking studies suggest that expert chess players use peripheral vision to judge chess positions and determine the best moves to play. However, the role of peripheral vision in chess has largely been inferred rather than tested through controlled experimentation. In this study, we used a gaze-contingent paradigm...
journal article 2023
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Afghari, A.P. (author), Vos, J. (author), Farah, H. (author), Papadimitriou, E. (author)
Driver anticipation plays a crucial role in crashes along horizontal curves. Anticipation is related to road predictability and can be influenced by roadway geometric design. Therefore, it is essential to understand which geometric design elements can influence anticipation and cause the road to be (un)predictable. This exercise, however, is not...
journal article 2023
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Guo, P. (author), Fool, F. (author), Chang, Z.Y. (author), Noothout, E.C. (author), Vos, H.J. (author), Bosch, Johan G. (author), de Jong, N. (author), Verweij, M.D. (author), Pertijs, M.A.P. (author)
This article presents a low-power and small-area transceiver application-specific integrated circuit (ASIC) for 3-D trans-fontanelle ultrasonography. A novel micro-beamforming receiver architecture that employs current-mode summation and boxcar integration is used to realize delay-and-sum on an N -element sub-array using N× fewer capacitive...
journal article 2023
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Murillo, Andrés (author), Taormina, R. (author), Tippenhauer, Nils Ole (author), Salaorni, Davide (author), van Dijk, Robert (author), Jonker, Luc (author), Vos, Simcha (author), Weyns, Maarten (author), Galelli, Stefano (author)
Numerical simulation models are a fundamental tool for planning and managing smart water networks—an evolution of water distribution systems in which physical assets are monitored and controlled by information and communication technologies. While simulation models allow us to understand the interactions between physical processes and abstract...
journal article 2023
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Memar Zahedani, Armin (author), Vos, J.V. (author), Erkin, Z. (author)
Double auctions are procedures to trade commodities such as electricity or parts of the wireless spectrum at optimal prices. Buyers and sellers inform the auctioneer what quantity they want to buy or sell at specific prices. The auctioneer aggregates these offers into demand and supply curves and finds the intersection representing the...
conference paper 2023
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Tseng, C. (author), Jaspers, Jaap (author), Romero, Alejandra Mendez (author), Wielopolski, Piotr (author), Smits, M. (author), van Osch, Matthias J.P. (author), Vos, F.M. (author)
The arterial input function (AIF) plays a crucial role in estimating quantitative perfusion properties from dynamic susceptibility contrast (DSC) MRI. An important issue, however, is that measuring the AIF in absolute contrast-agent concentrations is challenging, due to uncertainty in relation to the measured (Formula presented.) -weighted...
journal article 2023
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Vos, D.A. (author), Verwer, S.E. (author)
Interpretability of reinforcement learning policies is essential for many real-world tasks but learning such interpretable policies is a hard problem. Particularly, rule-based policies such as decision trees and rules lists are difficult to optimize due to their non-differentiability. While existing techniques can learn verifiable decision...
conference paper 2023
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