Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 3281 for “"consensus"”.
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Fault-tolerant consensus in directed graphs and convex hull consensus
… studies the fault-tolerance aspect of the consensus algorithm, which is a fundamental building block for the distributed systems. Particularly, the dissertation has the following two main contributions on fault-tolerant consensus in message-passing networks: • We explore various …
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Distributed consensus revised
… systems in every aspect of life. Distributed consensus, the ability to reach agreement in the face of failures and asynchrony, is a fundamental and powerful primitive for constructing reliable distributed systems from unreliable components. For over two decades, the Paxos algorithm has been …
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Efficient and egalitarian consensus
Consensus is a classic problem in distributed computing. Research on consensus has traditionally focused on the permissioned setting where participants are fixed and know each other beforehand. Recently, the digital currency Bitcoin has popularized a new line of research on consensus in a …
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Defending distributed systems against adversarial attacks: consensus, consensus-based learning, and statistical learning
… propose and explore the problems of performing consensus, consensus-based learning, and statistical learning in the presence of malicious components. (1) Consensus: In this dissertation, we explore the influence of communication range on the computability of reaching iterative approximate …
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A consensus of playwriting theory
Call number: LD2668 .T4 1985 C87
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Consensus-type stochastic approximation algorithms
… work is concerned with asymptotic properties of consensus-type algorithms for networked systems whose topologies switch randomly. The regime-switching process is modeled as a discrete-time Markov chain with a nite state space. The consensus control is achieved by designing stochastic …
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CAGE - Consensus Algorithm Genetically Encouraged
… components of Blockchain Technology is the consensus algorithms used to i) select a node in the network responsible for providing a block added to the blockchain; and, ii) verify that block and ensure trust between the nodes within the system. This research proposes a newly developed …
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Computational Approaches to Linguistic Consensus
This work has important implications for many kinds of distributed semantic systems, such as shared web ontologies, agent communication protocols, collaborative tagging, database schema integration, and biological networks.
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Improving Performance of Consensus Protocols
Designing an efficient solution for Byzantine Broadcast (BB) is a central problem for many distributed computing and cryptographic tasks. Some of the most important challenges include improving the round complexity, the communication complexity of the protocol and tolerating strong adversaries. For …
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Computationally-efficient methods for reaching consensus
Los sistemas de votación se remontan a la antigüedad y son un elemento clave de la vida cotidiana en las sociedades actuales. Durante los últimos siglos se han propuesto muchas metodologías para llegar a decisiones colectivas. En esta tesis nos centramos en la parte del campo de teoría de la …
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Consensus Algorithms for Trees and Strings
This thesis studies the computational complexity and polynomial-time approximability of a number of discrete combinatorial optimization problems involving labeled trees and strings. The problems considered have applications to computational molecular biology, pattern matching, and many other areas …
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CRYPTOGRAPHY FROM CONSENSUS TO THE COSMOS
… two parts. First, we re-visit the foundations of consensus protocols, arguing that despite 50 years of research, there is room to make them simpler, more secure, and more efficient. As a pillar of distributed systems, consensus algorithms power everything from distributed databases to …
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Consensus building in distributed design discussions
… perspectives, but my PhD dissertation brings consensus building as a new theoretical lens to study and support decision making in design discussions. This has allowed my work to make three contributions. First I contribute empirical knowledge showing that nearly half of the discussions do not …
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Consensus-building in electric utility regulation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1992.
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A Scalable Leader Based Consensus Algorithm
Present-day commonly used systems like Cassandra, Spanner, and CockroachDB require high availability and strict consistency guarantees. High availability is attained through redundancy. In the field of computing, redundancy is attained through state machine repli- cation. Protocols like Raft, …
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Generalized Consensus for Practical Fault-Tolerance
… presents Elpis, the first multi-leader XFT consensus protocol. By adopting the Generalized Consensus specification from the Crash Fault Tolerance model, we were able to devise a multi-leader protocol that exploits the commutativity property inherent in the commands ordered by the system. …
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Consensus Information in the Newspaper Advice Columns
… use of consis tency, distinctiveness and consensus information, which are the three information variables in Kelley's (1967) covariation model of attribu tion. Newspaper advice columns were used as a naturalistic source of social data.</p><p>The first question addressed in this study was …
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Epistemic Implications of Scientific Consensus and Dissent
Consensus and dissent play important roles in science. Both scientific consensus and dissent are said to be epistemically beneficial: consensus is often taken as a mark of knowledge and as a basis for informing decision-making and policy, whereas dissent is often taken as being necessary for …
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Efficient and resilient consensus for permissioned blockchain
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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