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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, Adriaan (author), Brighente, Alessandro (author), Conti, M. (author)IEEE 802.1CB provides a standard for reliable packet delivery within Time-Sensitive Networking (TSN). As this standard is envisioned to be used in mission-critical networks in the near future, it has to be protected against security threats. The integrity of the network communication should be the biggest focus as guaranteed delivery is...conference paper 2023
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de Vos, M.A. (author), Ishmaev, G. (author), Pouwelse, J.A. (author), Roos, S. (author)Catalyzed by the popularity of blockchain technology, there has recently been a renewed interest in the design, implementation and evaluation of decentralized systems. Most of these systems are intended to be deployed at scale and in heterogeneous environments with real users and unpredictable workloads. Nevertheless, most research in this field...conference paper 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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Scheffers, E.L. (author), de Vos, P. (author)Reliability and survivability play a key role in the ship operation and ship design process of navy ships, but increasingly also of complex commercial vessels. These requirements prove relevant for different elements within the ship design scope, including the distribution system design of data, energy and fluid (water, fuel, oil, etc.). In...conference paper 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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Nasrulin, B. (author), de Vos, M.A. (author), Ishmaev, G. (author), Pouwelse, J.A. (author)The growing number of implementations of blockchain systems stands in stark contrast with still limited research on a systematic comparison of performance characteristics of these solutions. Such research is crucial for evaluating fundamental trade-offs introduced by novel consensus protocols and their implementations. These performance...conference paper 2022
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de Vos, J. (author), Pruyn, J.F.J. (author), Hekkenberg, R.G. (author)Autonomous ships have become a topic of interest for an increasing number of researchers over the last few years. Most of the research that is being performed focuses on autonomous navigation. An important driver for this research is the belief that autonomous navigation will increase safety at sea. In order to evaluate the possible safety...conference paper 2022
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de Vos, M.A. (author)Marketplaces facilitate the exchange of services, goods, and information between individuals and businesses. They play an essential role in our economy. The standard approach to devise digital marketplaces is by deploying centralized infrastructure, entirely operated and managed by a market operator. In such centralized marketplaces, trusted...doctoral thesis 2021
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Rodrigo Valero, P. (author), Pouwelse, J.A. (author), de Vos, M.A. (author)Non-Fungible Tokens (NFTs) leverage blockchain technology to certify and transfer ownership of digital assets to individuals. NFTs on the Ethereum blockchain have garnered significant attention recently, with a trading volume of over $2 billion in Q1 2021 only. At the same time, established NFT solutions have low flexibility, limited...conference paper 2021
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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