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de Vos, M.A. (author), Ishmaev, G. (author), Pouwelse, J.A. (author)The popularity of blockchain technology has bootstrapped many “Web3” applications, e.g., Ethereum and IPFS, that apply distributed ledger technology to store transactions. The amount of transactions generated and stored in such Web3 applications is significant and, in its raw form, usually not searchable by users. Existing Web3 transaction...journal article 2024
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de Vos, B. (author), Remis, R.F. (author), Webb, A. (author)MRI systems have a thin conducting layer placed between the gradient and RF coils, this acts as a shield at the RF-frequency, minimizing noise coupled into the experiment, and decreasing the coupling between the RF and gradient coils. Ideally, this layer should be transparent to the gradient fields to reduce eddy currents. In this work the...journal article 2024
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Kon, Johan (author), de Vos, Naomi (author), Bruijnen, Dennis (author), van de Wijdeven, Jeroen (author), Heertjes, Marcel (author), Oomen, T.A.E. (author)Tracking performance of physical-model-based feedforward control for interventional X-ray systems is limited by hard-to-model parasitic nonlinear dynamics, such as cable forces and nonlinear friction. In this paper, these nonlinear dynamics are compensated using a physics-guided neural network (PGNN), consisting of a physical model, embedding...journal article 2023
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de Vos, B. (author), Remis, R.F. (author), Webb, A. (author)Purpose: Concomitant gradient fields have been extensively studied at clinical field strengths. However, their effects have not yet been modeled for low-field point-of-care (POC) systems. The purpose of this work is to characterize the effects associated with concomitant fields for POC Halbach-array-based systems. Methods: The concomitant...journal article 2023
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de Vos, B. (author), Remis, R.F. (author), Webb, A. (author)Objective: Low-cost low-field point-of-care MRI systems are used in many different applications. System design has correspondingly different requirements in terms of imaging field-of-view, spatial resolution and magnetic field strength. In this work an iterative framework has been created to design a cylindrical Halbach-based magnet along...journal article 2023
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de Vos, P. (author), Somers, L.M.T. (author), Tinga, T. (author), Foekema, E.M. (author), van der Zwaan, B. (author), Negenborn, R.R. (author)Several news items and short movies have appeared online recently, announcing that the AmmoniaDrive Consortium was awarded a prestigious NWO Perspectief grant. But what is the AmmoniaDrive research project? How does it contribute to combatting shipping-induced climate change? Who are in the consortium and why? And finally, what research...journal article 2022
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de Vos, P. (author), de van der Schueren, T.A.R. (author), Los, S. (author), Visser, K. (author)In this paper a Concept Exploration Tool (CET) for naval ship power plants is presented. The ideas behind the CET are introduced as well as the inner workings of the tool. Objective functions for different relevant design criteria (energy efficiency, emissions, signatures, etc.) are shortly discussed, after which the results for a Frigate case...journal article 2022
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Sui, Congbiao (author), de Vos, P. (author), Stapersma, D. (author), Visser, K. (author), Hopman, J.J. (author), Ding, Yu (author)Analysis of ship propulsion system performance is often performed using detailed hydrodynamic models to assess load changes, which are subsequently compared to static engine limits, or by detailed engine models that are rarely integrated with sufficiently detailed propulsion models for load change estimation. To investigate the dynamic engine...journal article 2022
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Sui, Congbiao (author), de Vos, P. (author), Hopman, J.J. (author), Visser, K. (author), Stapersma, D. (author), Ding, Yu (author)Current EEDI (Energy Efficiency Design Index) regulations striving to reduce the installed engine power on new ships for a low EEDI may lead to underpowered ships having insufficient power when operating in adverse sea conditions. In this paper, the operational safety of a low-powered ocean-going cargo ship operating in adverse sea conditions...journal article 2022
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de Vos, M.A. (author), Ishmaev, G. (author), Pouwelse, J.A. (author)The landscape of electronic marketplaces has been monopolized by a handful of market operators that have accumulated tremendous power during the last decades. This trend raises concerns about fairness and market manipulation by these operators acting as gatekeepers. These concerns have recently been outlined in the EU Digital Markets Act (DMA...journal article 2022
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de Vos, M.A. (author), Ileri, Can Umut (author), Pouwelse, J.A. (author)Permissioned blockchains are increasingly being used as a solution to record transactions between companies. Several use cases that leverage permissioned blockchains focus on the representation and management of real-world assets. Since the number of incompatible blockchains is quickly growing, there is an increasing need for a universal...journal article 2021
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de Vos, M.A. (author), Pouwelse, J.A. (author)“Big Tech” companies provide digital services used by billions of people. Recent developments, however, have shown that these companies often abuse their unprecedented market dominance for selfish interests. Meanwhile, decentralized applications without central authority are gaining traction. Decentralized applications critically depend on...journal article 2021
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de Vos, J. (author), Hekkenberg, R.G. (author), Valdez Banda, Osiris A. (author)The advent of autonomous ships that are unmanned or low-manned will reduce the number of people at risk at sea. Even when autonomous navigation does not reduce the number of accidents, this means that safety at sea will increase. In fact, increased safety is one of the primary perceived drivers for autonomous shipping, although this safety...journal article 2021
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Esmat, A.A.S. (author), de Vos, M.A. (author), Ghiassi-Farrokhfal, Yashar (author), Palensky, P. (author), Epema, D.H.J. (author)Peer-to-Peer (P2P) energy trading, which allows energy consumers/producers to directly trade with each other, is one of the new paradigms driven by the decarbonization, decentralization, and digitalization of the energy supply chain. Additionally, the rise of blockchain technology suggests unprecedented socio-economic benefits for energy...journal article 2021
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de Vos, B. (author), Parsa, Javad (author), Abdulrazaq, Zaynab (author), Teeuwisse, Wouter M. (author), Van Speybroeck, Camille D.E. (author), de Gans, D.H. (author), Remis, R.F. (author), O’Reilly, Tom (author), Webb, A. (author)Low-field permanent magnet-based MRI systems are finding increasing use in portable, sustainable and point-of-care applications. In order to maximize performance while minimizing cost many components of such a system should ideally be designed specifically for low frequency operation. In this paper we describe recent developments in...journal article 2021
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Sapra, H.D. (author), Stam, J.N. (author), Reurings, Jeroen (author), van Biert, L. (author), van Sluijs, Wim (author), de Vos, P. (author), Visser, K. (author), Aravind, P.V. (author), Hopman, J.J. (author)The current literature on solid oxide fuel cell and internal combustion engine (SOFC-ICE) integration is focused on the application of advanced combustion technologies operating as bottoming cycles to generate a small load share. This integration approach can pose challenges for ships such as restricted dynamic capabilities and large space...journal article 2021
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Habben Jansen, A.C. (author), de Vos, P. (author), Duchateau, E.A.E. (author), Stapersma, D. (author), Hopman, J.J. (author), van Oers, B.J. (author), Kana, A.A. (author)Naval ships are designed to operate and survive in hostile environments. As such, vulnerability reduction is a major topic of interest during the design of a naval ship. For modern naval ships the vulnerability is largely determined by the design and layout of distributed systems. The vulnerability of these systems needs to be assessed early on,...journal article 2020
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de Vos, P. (author)The hybrid internal combustion engine-solid oxide fuel cell AmmoniaDrive concept is a single-fuel, high-efficiency, high-tech ship power/propulsion plant solution that will produce no pollutant emissions. It also strikes the right balance between different, relevant ship design considerations. Too good to be true?journal article 2020
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de Vos, J. (author), Hekkenberg, R.G. (author), Koelman, H.J. (author)In recent years, a significant amount of research has been conducted on autonomous ships. Since it is assumed that these ships will sail with a significantly reduced crew or even without people on board, the design of the ship needs reconsideration. The absence of people on board and the associated safety measures could result in a more...journal article 2020
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Sapra, H.D. (author), Godjevac, M. (author), de Vos, P. (author), Van Sluijs, Wim (author), Linden, Youri (author), Visser, K. (author)With increasingly stringent emission regulations, marine natural gas engines need to improve their performance. Various proven advantages of hydrogen-natural gas (H-NG) blends make them a promising enhanced fuel solution. Although modelling of H-NG combustion has been investigated before, mostly using CFD models, the literature on the...journal article 2020
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