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Percolation and Internet Science

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Improving availability with recursive microreboots: a soft-state system case study

George Candea

Even after decades of software engineering research, complex computer systems still fail. This paper makes the case for increasing research emphasis on dependability and, specifically, on improving availability by reducing time-to-recover. All software fai ...

2004

On network form and function

Andrea Rinaldo, Amos Maritan

Moving from the observation that drainage network configurations minimizing total energy dissipation are stationary solutions of the general equation describing landscape evolution, we review theoretical and observational evidence on river patterns and the ...

2004

Critical behaviour of the piezoresistive response in RuO2-glass composites

Peter Ryser, Claudio Grimaldi, Thomas Maeder

We re-analyse earlier measurements of resistance R and piezoresistance K in RuO2-based thick-film resistors (TFRs). The percolating nature of transport in these systems is well accounted by values of the transport exponent t larger than its universal value ...

2003

A model of transport nonuniversality in thick-film resistors

Peter Ryser, Claudio Grimaldi, Thomas Maeder

We propose a model of transport in thick-film resistors which naturally explains the observed nonuniversal values of the conductance exponent t extracted in the vicinity of the percolation transition. Essential ingredients of the model are the segregated m ...

2003

Bullet: high bandwidth data dissemination using an overlay mesh

Dejan Kostic

In recent years, overlay networks have become an effective alternative to IP multicast for efficient point to multipoint communication across the Internet. Typically, nodes self-organize with the goal of forming an efficient overlay tree, one that meets pe ...

2003

Transport nonuniversality and critical behavior of the piezoresistive response in thick-film resistors

Peter Ryser, Claudio Grimaldi, Thomas Maeder, Sonia Vionnet Menot

Thick-film resistors (TFRs) consist of a percolating network of conducting oxide nanoparticlesdispersed in an insulating glassy matrix, whose resistive properties are dominated by quantumtunneling across insulating layers separating adjacent conducting gra ...

2003

Opus: an overlay peer utility service

Dejan Kostic

Today, an increasing number of important network services, such as content distribution, replicated services, and storage systems, are deploying overlays across multiple Internet sites to deliver better performance, reliability and adaptability. Currently ...

IEEE2002

Oxygen diffusion through the disordered oxide network during silicon oxidation

Alfredo Pasquarello, Angelo Bongiorno

An atomic-scale description is provided for the long-range oxygen migration through the disordered SiO2 oxide during silicon oxidation. First-principles calculations, classical molecular dynamics, and Monte Carlo simulations are used in sequence to span th ...

2002

Connectivity in ad-hoc and hybrid networks

Martin Hasler

We consider a large-scale wireless network, but with a low density of nodes per unit area. Interferences are then less critical, contrary to connectivity. This paper studies the latter property for both a purely ad-hoc network and a hybrid network, where f ...

2002

Connectivity in ad-hoc and hybrid networks

Patrick Thiran, Martin Hasler, Olivier Dousse

2002