Par Hasard

Technologie et organisation : le hasard et la nécessité

Evolution of ICT in organizations are following two contradictory trends. One the one hand, definition and concepts defining these technologies are loosing specificity, on the other hand, these technologies take a growing place in organizational life. Characterization of ICT is particularly difficult as ICT are especially flexible and can be substituted easily to one another. The reasons are nu...

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Processing graphical data, either for its editing or the synthesis of new content, demands agood balance between the different sources of information one may exploit. Unlike "proce-dural" techniques, synthesis by example stands out thanks to its extreme ease-of-use : indeed,tasks such as identification, analysis and reproduction of the distinguishing features of the user-provide...

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ion de prédicats L’abstraction de prédicats peut être utilisée pour améliorer l’analyse d’accessibilité. Elle consiste à analyser la valeur de vérité d’un ensemble de prédicats plutôt que de calculer des ensembles d’état continus [6, 5]. Des techniques de raffinement guidées par les contre-exemples [30] sont une autre application importante de cette approche. Ces techniques ont été utilisées da...

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Wireless networks have experienced drastic evolutions in the last few years. While many aspects related to “single cell” wireless networks were already resolved, wireless multihop networks still suffer poor performances and limited capacities. This thesis aims at providing acceptable quality of service in terms of throughput and loss ratio to end users in various wireless multihop environments....