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Université de Fribourg

Opinion dynamics and wisdom under conformity

Buechel, Berno ; Hellmann, Tim ; Kloessner, Stefan

In: Journal of economic dynamics and control, 2015, vol. 52, p. 240-257

We study a dynamic model of opinion formation in social networks. In our model, boundedly rational agents update opinions by averaging over their neighbors’ expressed opinions, but may misrepresent their own opinion by conforming or counter-conforming with their neighbors. We show that an agent׳s social influence on the long-run group opinion is increasing in network centrality and...

Università della Svizzera italiana

On the many faces of atomic multicast

Coelho, Paulo ; Pedone, Fernando (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2019 ; 2019INFO004.

Many current online services need to serve clients distributed across geographic areas. Coordinating highly available and scalable geographically distributed replicas, however, is challenging. While State Machine Replication is the most direct way of achieving availability, no scalability comes from the traditional approach. Typically, scalability is obtained by partitioning the original...

Consortium of Swiss Academic Libraries

Tolerating permanent and transient value faults

Milosevic, Zarko ; Hutle, Martin ; Schiper, André

In: Distributed Computing, 2014, vol. 27, no. 1, p. 55-77

Università della Svizzera italiana

Consensus protocols exploiting network programmability

Dang, Huynh Tu ; Soulé, Robert (Dir.) ; Pedone, Fernando (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2019 ; 2019INFO003.

Services rely on replication mechanisms to be available at all time. The service demanding high availability is replicated on a set of machines called replicas. To maintain the consistency of replicas, a consensus protocol such as Paxos or Raft is used to synchronize the replicas' state. As a result, failures of a minority of replicas will not affect the service as other non-faulty replicas...

Consortium of Swiss Academic Libraries

Anonymous and fault-tolerant shared-memory computing

Guerraoui, Rachid ; Ruppert, Eric

In: Distributed Computing, 2007, vol. 20, no. 3, p. 165-177

Consortium of Swiss Academic Libraries

Institutional virtue: how consensus matters

Konzelmann Ziv, Anita

In: Philosophical Studies, 2012, vol. 161, no. 1, p. 87-96

Haute école de santé Genève

Consensus suisse romand sur les textures modifiées et les liquides épaissis : quel est le besoin des professionnels ? : travail de Bachelor

Feger, Lisa ; Perseghini, Audrey ; Reinert, Raphaël (Dir.)

Mémoire de bachelor : Haute école de santé Genève, 2014.

Introduction : L’alimentation sous forme de textures modifiées (TM) et de liquides épaissis (LE) est reconnue comme le traitement de choix dans la prise en charge de la dysphagie. Or, la terminologie, le nombre et les caractéristiques des TM et des LE diffèrent d’un pays à l’autre, voire d’une région à l’autre. Le consensus australien sur le TM et les LE a mis en évidence...

Université de Neuchâtel

Anonymity and trust in large-scale distributed storage systems

Valerio, José ; Felber, Pascal (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2013.

Large-Scale Distributed Storage Systems (LS-DSSs) are at the core of several Cloud services. These externalized services may run atop multiple administrative domains. While a client may trust the organization that provides a given Web service, a single server may belong to another organization that the client does not trust. The design of a Distributed Storage System is itself a challenging task,...

Università della Svizzera italiana

Multicoordinated agreement protocols and the log service

Camargos, Lasaro Jonas ; Pedone, Fernando (Dir.) ; Madeira, Edmundo R.M. (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2008 ; 2008INFO001.

Agreement problems are a common abstraction in distributed systems. They appear when the components of the system must concur on reconfigurations, changes of state, or in lines of action in general. Examples of agreement problems are Consensus, Atomic Commitment, and Atomic Broadcast. In this thesis we investigate these abstractions in the context of the environment in which they will run and the...