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Modeling and validating the performance of atomic broadcast algorithms in high-latency networks

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Expanding the Size of Organometallic Nanostructures: A Hexanuclear (Cymene)Ru Cylinder with a Length of more than 3 nm

Rosario Scopelliti, Kay Severin

Coordination cages based on organometallic half-sandwich complexes are of interest, because they can display unique structures and host properties. This communication describes the synthesis and structure of a cylindrical nanostructure containing six (p-cy ...

2009

Atomic broadcast

Nils Richard Ekwall

Within only a couple of generations, the so-called digital revolution has taken the world by storm: today, almost all human beings interact, directly or indirectly, at some point in their life, with a computer system. Computers are present on our desks, co ...

EPFL2007

The Time-Complexity of Local Decision in Distributed Agreement

Rachid Guerraoui, Bastian Pochon, Partha Dutta

Agreement is at the heart of distributed computing. In its simple form, it requires a set of processes to decide on a common value out of the values they propose. The time-complexity of distributed agreement problems is generally measured in terms of the n ...

2007

A multimodal pattern recognition framework for speaker detection

Patricia Besson

Speaker detection is an important component of a speech-based user interface. Audiovisual speaker detection, speech and speaker recognition or speech synthesis for example find multiple applications in human-computer interaction, multimedia content indexin ...

EPFL2007

Modèle de prévision et de gestion des crues

Frédéric Jordan

Floods are not only due to fatality. It is the responsibility of the human being to protect himself from heavy damages due to natural elements, and he sometimes has the chance to profit from a given situation to influence events. One of these possibilities ...

EPFL2007

Patterns of dominant flows in the world trade web

The large-scale organization of the world economies is exhibiting increasingly levels of local heterogeneity and global interdependency. Understanding the relation between local and global features calls for analytical tools able to uncover the global emer ...

Springer-Verlag2007

Comparing Atomic Broadcast Algorithms in High Latency Networks

André Schiper, Nils Richard Ekwall

Since the introduction of the concept of failure detectors, several consensus and atomic broadcast algorithms based on these detectors have been published. The performance of these algorithms is often affected by a trade-off between the number of communica ...

2006

Improving Fast Paxos: being optimistic with no overhead

André Schiper

The paper addresses the cost of consensus algorithms. It has been shown that in the best case, consensus can be solved in two communication steps with f < n/2, and in one communication step with f < n/3 (f is the maximum number of faulty processes). This l ...

2006

Optimistic Algorithms for Partial Database Replication

Nicolas Schiper, Rodrigo Malta Schmidt, Fernando Pedone

In this paper, we study the problem of partial database replication. Numerous previous works have investigated database replication, however, most of them focus on full replication. We are here interested in genuine partial replication protocols, which req ...

2006

Language Support for Fast and Reliable Message Based Communication in Singularity OS

James Richard Larus

Message-based communication offers potential benefits of providing stronger specification and cleaner separation between components. Compared with shared-memory interactions, message passing has the potential disadvantages of being more expensive (no direc ...

2006