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Publications associées (267)

Automatic Configuration of an Autonomic Controller: An Experimental Study with Zero-Configuration Policies

Autonomic control managers can remove the need for manual system configuration in order to achieve good performance and efficient resource utilization. However, simple controllers based on reconfiguration actions tied to thresholds, or 'if-then' rules, the ...

2008

Approximating connected facility location problems via Random facility sampling and core detouring

Friedrich Eisenbrand, Thomas Rothvoss

We present a simple randomized algorithmic framework for connected facility location problems. The basic idea is as follows: We run a black-box approximation algorithm for the unconnected facility location problem, randomly sample the clients, and open the ...

2008

Reputation Systems for Self-Organized Networks

Jean-Yves Le Boudec, Jochen Mundinger, Sonja Buchegger

Self-organized networks such as mobile ad-hoc, Internet-based peer-to-peer, wireless mesh and Fourth Generation (4G) Wireless networks depend on cooperation of nodes. Reputation systems help nodes decide with whom to cooperate and which nodes to avoid. The ...

2008

Optimal Scheduling of Peer-to-Peer File Dissemination

Jochen Mundinger

Peer-to-peer (P2P) overlay networks such as BitTorrent and Avalanche are increasingly used for disseminating potentially large files from a server to many end users via the Internet. The key idea is to divide the file into many equally-sized parts and then ...

2007

Analytical Modeling of Large-Signal Cyclo-Stationary Low-Frequency Noise With Arbitrary Periodic Input

Christian Enz, Ananda Sankar Roy

Low-frequency (LF) noise under cyclo-stationary excitation has received considerable attention recently. Until now, only semiempirical models for cyclo-stationary random telegraph signal (RTS) and flicker noise have been reported in the literature. In this ...

2007

Modeling of Hysteresis Losses Applied to Slotless Permanent Magnet Motors

Yves Perriard, Miroslav Markovic, Pierre-Daniel Pfister

The paper presents a method to determine hysteresis losses in synchronous permanent magnet (M) slotless motors. The method comprises four steps: (1) experimental determination of the B-H loop, () analytical modeling of the B-H loop by applying different mo ...

2007

The role of the amino-organosilane/SiOx interphase in the barrier and mechanical performance of nanocomposites

Yves Leterrier, Gil Rochat

The aim of this study is to develop coatings on polymer substrates with a combined increase in oxygen barrier performance and toughness, based on SiOx coatings modified with multifunctional organo-silane polymers of controlled polarity and reactivity. As a ...

2006

Analytical modeling of the flux density in permanent magnet motors

Yves Perriard

This paper presents an analytical model for the calculation of the flux density in PM synchronous motors. Parallel and radial magnetization of surface-mounted magnets and finite permeability of the iron are taken into account. © 2006 IEEE. ...

2006

Analysis of hysteresis losses in synchronous permanent magnet motors

Yves Perriard, Miroslav Markovic, Pierre-Daniel Pfister

The paper presents a method to determine hysteresis losses in synchronous permanent magnet (PM) motors. The method comprises four steps: (1) experimental determination of the B-H loop, (2) analytical modeling of the B-H loop by applying different models, ( ...

2006

Le management des communautés virtuelles

Olivier Glassey

In the last three decades the management of information technologies has become a major issue in most organizations. In this context, virtual communities (VC), as a means to technologically foster collective social exchanges, are often proposed as viable s ...

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