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Cette thèse est consacrée à l’étude de la transition liquide/solide amorphe. Cette transition se retrouve dans des systèmes thermiques (par exemple dans les verres moléculaires) ou athermiques (avec entre autres les milieux granulaires), à l’équilibre thermodynamique ou hors équilibre. Nous

encouraged me to be motivated and to keep working on the thesis. I would like to thank him for all his time that he has spent on reading my thesis, on giving me direct comments, and further motivation. I had times when I felt lost in my own thesis, and I was ready to give up, but Dr. Aldewereld always

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Tracker soft-ware system is presented. The system is shown effective through multiple proxy deploy-

Abstract Supporting database schema evolution repre-sents a long-standing challenge of practical and theoretical importance for modern information systems. In this paper, we describe techniques and systems for automating the critical tasks of migrating the database and rewriting the legacy applications. In addition to labor saving, the ben-efits delivered by these advances are many and include reliable prediction of outcome, minimization of downtime, system-produced documentation, and support for archiving, historical queries, and provenance. The PRISM/PRISM++ system delivers these benefits, by solving the difficult prob-lem of automating the migration of databases and the rewrit-ing of queries and updates. In this paper, we present the PRISM/PRISM++ system and the novel technology that made it possible. In particular, we focus on the difficult and previously unsolved problem of supporting legacy queries and updates under schema and integrity constraints evolution. The PRISM/PRISM++ approach consists in providing the users with a set of SQL-based Schema Modification Opera-tors (SMOs), which describe how the tables in the old schema are modified into those in the new schema. In order to sup-port updates, SMOs are extended with integrity constraints

[ A review of past and recent strategies for sub-Nyquist sampling] Signal processing methods have changed substantially over the last several decades. In modern applications, an increasing number of functions is being pushed forward to sophisticated software algorithms, leaving only delicate finely