Searched for: subject:"consensus"
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Görkey, Isitan (author), El Moussaoui, Chakir (author), Wijdeveld, Vincent (author), Sennema, Erik (author)
Blockchain is a technology that is in use increasingly. Although owing its common use to the cryptocurrencies there is more to the blockchain technology than just the monetary use. One of these uses is by smaller groups of participants under the control of a central authority, for instance at a company. Such private blockchains use permissioned...
student report 2020
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Postma, Jeroen (author)
Recent studies in game-theory provided ways to steer multi-agent games to their Nash equilibrium by means of a decentralized approach. However, these approaches have not considered the internal dynamics of the individual agents. This thesis work provides decentralized control methods to account for these internal dynamics whilst ensuring that...
master thesis 2020
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McAllister, Pat (author), Nase, I. (author)
This study updates and expands upon the existing work on the accuracy of the IPF’s Consensus Forecasts. The paper evaluates the extent to which the consensus forecasts were able to predict the relative performance. It also assesses the accuracy of implied yield forecasts and concludes that failure in yield forecasting is the main source of...
journal article 2020
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Brouwer, Jetse (author)
Distributed ledger technology was expected to spark a technical revolution similar to the internet revolution. After the release of Bitcoin in 2008, many developments have significantly increased the performance of distributed ledger technology. Nevertheless, the first truly scalable ledger has yet to be deployed. All of them have issues with...
master thesis 2020
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Lopes Parreira, Pedro Guilherme (author)
Multiple solutions for solving optimal power flow (OPF) have been employed, most of them using a centralised approach. However, there is another approach where every node is responsible for the local problem in order to reach a solution: the decentralised optimal power flow (D-OPF). In this thesis, the aim was to improve the speed and...
master thesis 2019
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Çalış, Metin (author)
Consensus problem has been a topic of interest for many research areas allowing multiple agents to reach an agreement through local information exchange. The explicit share of the state variables, however, may cause privacy issues due to the confidentiality of the initial values. In this work, asynchronous privacy-preserving consensus average...
master thesis 2019
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Zevenbergen, Chris (author)
Energy distribution systems are undergoing rapid change in terms of energy generation techniques and network topology. The shift towards sustainable energy generation leads to distributed energy networks, thereby replacing the old-fashioned centralized networks. A promising type of distributed network is the microgrid. A distributed topology has...
master thesis 2019
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Coppola, M. (author), Guo, J. (author), Gill, E.K.A. (author), de Croon, G.C.H.E. (author)
This work proposes PageRank as a tool to evaluate and optimize the global performance of a swarm based on the analysis of the local behavior of a single robot. PageRank is a graph centrality measure that assesses the importance of nodes based on how likely they are to be reached when traversing a graph. We relate this, using a microscopic...
journal article 2019
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Ren, Z. (author), Erkin, Z. (author)
Blockchains is a special type of distributed systems that operates in unsafe networks. In most blockchains, all nodes should reach consensus on all state transitions with Byzantine fault tolerant algorithms, which creates bottlenecks in performance. In this paper, we propose a new type of blockchains, namely Value-Centric Blockchains (VCBs),...
conference paper 2019
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Coutiño Minguez, M.A. (author), Isufi, E. (author), Leus, G.J.T. (author)
Graph filters are one of the core tools in graph signal processing. A central aspect of them is their direct distributed implementation. However, the filtering performance is often traded with distributed communication and computational savings. To improve this tradeoff, this paper generalizes state-of-the-art distributed graph filters to...
journal article 2019
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Sewsingh, Ricky (author)
During military or peacekeeping operations it is often the case that coalitions are formed between nations or instances to achieve common objectives by joint decision making and resource sharing. Often a coalition partner participates for a certain period of time and other nations or instances might want to join the coalition in a later stage,...
master thesis 2018
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Rezvani, Z. (author)
The purpose of this study was to explore the role of middle management in safety within hazardous industries such as the oil and gas industries. In so doing, the study has answered the main research question, what are the roles and responsibilities of middle managers in risk management and safety oriented decision-making? To achieve the...
doctoral thesis 2018
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Vodă, Mircea (author)
The continuous shift of various industries towards internet-based services have caused an exponential growth in the amount of data produced over the past few years. On top of this, the increasing need for real-time analytics and the increase in data velocity have made asynchronous, event-driven applications the norm. In this context, the...
master thesis 2018
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Valk, Laurens (author), Keviczky, T. (author)
We show how passivity-based control by interconnection and damping assignment (IDA-PBC) can be used as a design procedure to derive distributed control laws for undirected connected networks of underactuated and fully-actuated heterogeneous mechanical systems. With or without leaders, agents are able to reach a stationary formation in the...
journal article 2018
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Özdemir, E. (author), Tasan-Kok, M.T. (author)
Citizen disagreement on urban policies and planning decisions is both ubiquitous and fundamental to democracy. Post-political debates debunk the ‘consensus approach’, which is grounded in Habermasian communication theory, for circumventing disagreement. This article presents a counter argument. Our analysis of the highly institutionalised and...
journal article 2017
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Cong, Kelong (author)
Blockchain systems have the potential to decentralise many traditionally centralised systems. However, scalability remains a key challenge. Without a horizontally scalable solution, where performance increases by adding more nodes to the system, blockchain systems remain unsuitable for ubiquitous use. We design a novel blockchain system called...
master thesis 2017
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Chauve, Cedric (author), Jones, M.E.L. (author), Lafond, Manuel (author), Scornavacca, Celine (author), Weller, Mathias (author)
abstract 2017
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Taebi, B. (author)
New technology brings great benefits, but it can also create new and significant risks. When evaluating those risks in policymaking, there is a tendency to focus on social acceptance. By solely focusing on social acceptance, we could, however, overlook important ethical aspects of technological risk, particularly when we evaluate technologies...
journal article 2016
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Zeng, Y. (author)
In digital speech communication applications like hands-free mobile telephony, hearing aids and human-to-computer communication systems, the recorded speech signals are typically corrupted by background noise. As a result, their quality and intelligibility can get severely degraded. Traditional noise reduction approaches process signals recorded...
doctoral thesis 2015
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Simonetto, A. (author), Jamali-Rad, H. (author)
Dual decomposition has been successfully employed in a variety of distributed convex optimization problems solved by a network of computing and communicating nodes. Often, when the cost function is separable but the constraints are coupled, the dual decomposition scheme involves local parallel subgradient calculations and a global subgradient...
journal article 2015
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