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Scheepstra, Karel (author)Multi-agent path finding (MAPF) is the task of finding non-conflicting paths for multiple agents that operate in a environment with shared resources. <br/>Finding an optimal solution quickly becomes intractable for many applications and consequently suboptimal methods are also explored extensively in literature. <br/>This work presents the...master thesis 2024
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Stokkink, Q.A. (author)The digital world is evolving toward representing - and serving the interconnection of - natural persons. Instead of depending on the intrastructure of Big Tech companies and governments, users can cooperate and use their hardware to form public infrastructure. Instead of existing by virtue of a reference in some institution's database, users...doctoral thesis 2024
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Li, Qiongxiu (author), Gundersen, Jaron Skovsted (author), Lopuhaa-Zwakenberg, Milan (author), Heusdens, R. (author)Privacy-preserving distributed average consensus has received significant attention recently due to its wide applicability. Based on the achieved performances, existing approaches can be broadly classified into perfect accuracy-prioritized approaches such as secure multiparty computation (SMPC), and worst-case privacy-prioritized approaches...journal article 2024
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Keskin, M. Onur (author), Cantürk, Furkan (author), Eran, Cihan (author), Aydoğan, Reyhan (author)This paper introduces a negotiation framework to solve the Multi-Agent Path Finding (MAPF) Problem for self-interested agents in a decentralized fashion. The framework aims to achieve a good trade-off between the privacy of the agents and the effectiveness of solutions. Accordingly, a token-based bilateral negotiation protocol and two...journal article 2024
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Li, Meng (author), Shen, Yanzhe (author), Ye, Guixin (author), He, Jialing (author), Zheng, Xin (author), Zhang, Zijian (author), Zhu, Liehuang (author), Conti, M. (author)Digital forensics is crucial to fight crimes around the world. Decentralized Digital Forensics (DDF) promotes it to another level by channeling the power of blockchain into digital investigations. In this work, we focus on the privacy and security of DDF. Our motivations arise from (1) how to track an anonymous- and-malicious data user who...journal article 2024
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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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Núñez-Gómez, Carlos (author), de Vos, Martijn (author), Decouchant, Jérémie (author), Pouwelse, J.A. (author), Caminero, Blanca (author), Carrión, Carmen (author)With the proliferation of Internet of Things (IoT) ecosystems, traditional resource orchestration mechanisms, executed on fog devices, encounter significant scalability, reliability and security challenges. To tackle these challenges, recent decentralized algorithms in Fog-IoT use Distributed Ledger Technologies to orchestrate resources and...journal article 2024
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Bhustali, P. (author), Andriotis, C. (author)Long-term inspection and maintenance (I&M) planning, a multi-stage stochastic optimization problem, can be efficiently formulated as a partially observable Markov decision process (POMDP). How- ever, within this context, single-agent approaches do not scale well for large multi-component systems since the joint state, action and observation...conference paper 2023
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Mukherjee, Sayak (author)Current methods in Federated and Decentralized learning presume that all clients share the same model architecture, assuming model homogeneity. However, in practice, this assumption may not always hold due to hardware differences. While prior research has addressed model heterogeneity in Federated Learning, it remains unexplored in fully...master thesis 2023
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Klabér, Rahim (author)The introduction of Blockchain technology has led to the idea of Decentralized Autonomous Organizations.<br/>(DAOs). DAOs enable decentralized and transparent collective wealth, allowing groups of individuals to pool their funds for collective management. DAOs rely on complex smart contracts to function. Despite Bitcoin being the most popular...master thesis 2023
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Zhou, Xiaochuan (author)Rural electrification remains a significant challenge for engineers, given its intricate relationship with multiple issues, including geographical constraints and underdeveloped infrastructural provisions. As a result, with the development of Solar Home Systems (SHS) and direct current (DC) microgrids, DC systems for energy access have emerged...master thesis 2023
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Ariana, Ramin (author)Swarm robotics (SR) is an emerging field of research that utilizes a swarm of robots that work together as a team to solve complex problems. One such challenge in SR is the exploration of unknown environments to find multiple targets. This problem finds applications in various domains, such as archaeology, underground exploration, signal source...master thesis 2023
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Madhwal, Rohan (author)Web3Recommend is a decentralized Social Recommender System implementation that enables Web3 Platforms on Android to generate recommendations that balance trust and relevance. Generating recommendations in decentralized networks is a non-trivial problem because these networks lack a global perspective due to the absence of a central authority....master thesis 2023
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Planje, Brian (author)Blockchain technology has allowed for the emergence of a new type of organization, the Decentralized Autonomous Organization (DAO). They have gained significant traction in recent years, reaching market capitalizations of up to 60 billion USD in 2021. These organizations coordinate economic activity by an unbounded group of people within an...master thesis 2023
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Werthenbach, Thomas (author)Federated learning is a privacy-enforcing machine learning technology but suffers from limited scalability. This limitation mostly originates from the internet connection and memory capacity of the central parameter server, and the complexity of the model aggregation function. Decentralized learning has recently been emerging as a promising...master thesis 2023
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Nieuwlaar, Erwin (author)The European Commission is developing a European Digital Identity (EDI), which will enable a trustworthy digital proof of identity for its citizens. We present a proof of identity in combination with cryptographic evidence of the natural person being authorized to act on behalf of a legal entity. Our study achieves this by connecting users of...master thesis 2023
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Gu, Yingxing (author), Wu, Xinyi (author), Goiati, Isamu (author), Garritsen, Merel (author)This project aims to address the challenges posed by the transition to renewable energy sources. This will cause an unstable and unreliable energy flow, which does not correspond with the current energy use patterns of society. Different elements of the current energy network are analysed. They have a big role in the transition towards a...student report 2023
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van den Berg, Ruben (author)The pressure on water and energy resources, along with the transition towards new infrastructure, requires an integrated approach to achieve future-proof concepts. A nexus approach can contribute to this by including the interaction between water and energy. This is also known as a water-energy nexus (WEN). Furthermore, when considering...master thesis 2023
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den Hartog, Harry (author)Waterways played a crucial role in the emergence of Shanghai as a cosmopolitan city and world port. Over the years the spatial and functional relationships between the city and ports and hinterland have been changing continuously. In Shanghai, like other port cities, almost all ports and related industries are placed out beyond the urban fringes...journal article 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