La déconstruction. A propos de la mort de Jacques Derrida

Diverse speeche and writing (2004)

Electrostatic Coupling of MEMs Structures: Transient Simulations and Dynamic Pull-in

Conference given outside the academic context (2004)

In Micro-electromechanical systems (MEMS) coupling of structures through electrostatic forces is a primordial phenomenon. Simulating the dynamics of MEMS and taking into account such strong coupling ... [more ▼]

In Micro-electromechanical systems (MEMS) coupling of structures through electrostatic forces is a primordial phenomenon. Simulating the dynamics of MEMS and taking into account such strong coupling effects allows to predict dynamical performance and stability, and is therefore an essential issue in design of highly effective and reliable devices. Analysis techniques for such systems require special attention in order to provide to the designer accurate and fast tools. We propose a finite element approach (FEM) that properly handles the strong electromechanical coupling in MEMS. In the simulation example of a micro-bridge, we show that such simulation techniques can reveal complex dynamical behaviors of MEMS such as dynamic pull-in. [less ▲]

Conception d'un élevage caprin laitier intégré au sein de l'écosystème local, l'exemple de la coopérative " Terre vivante ".

Article for general public (2004)

Balade géologique le long de l'Ourthe, de Liège à Comblain-au-Pont

Article for general public (2004)

The regional governement of Wallonia (Région wallonne, DGARNE) is actually supporting (since 1990) the "New geological map of Wallonia" research program, updating the former edition accomplished between ... [more ▼]

The regional governement of Wallonia (Région wallonne, DGARNE) is actually supporting (since 1990) the "New geological map of Wallonia" research program, updating the former edition accomplished between 1890 and 1919. The Walloon Region wants to enrich it by explicative works aiming to reach a large public like families, young people, etc... and to link physical activities to natural discoveries, in the respect of environment and nature. [less ▲]

A la recherche de la vie dans le système solaire

Article for general public (2004)

Conservation ex situ de tubérculos andinos y analisis de datos de la diversidad genética de la oca (Oxalis tuberosa Mol.)

Conference given outside the academic context (2004)

Principes de base du fonctionnement du réseau GSM

Article for general public (2004)

Si la téléphonie mobile se banalise aujourd'hui, on le doit à la conjonction de l'avènement du numérique, à l'accroissement des performances des semi-conducteurs et à différentes avancées technologiques ... [more ▼]

Si la téléphonie mobile se banalise aujourd'hui, on le doit à la conjonction de l'avènement du numérique, à l'accroissement des performances des semi-conducteurs et à différentes avancées technologiques. Mais le facteur déterminant fut sans doute la cristallisation autour de la norme GSM issue d'un effort soutenu de standardisation mené à l'ETSI (Organe européen de normalisation en télécommunications, créé à l'initiative du Conseil des ministres). Dans cet article, nous passerons en revue différents aspects de la technologie GSM : éléments de la couche physique, caractérisation de la partie radio, architecture du réseau, etc. Pour faciliter la lecture --il faut concéder que les acronymes abondent dans ce domaine--, un glossaire est fourni en fin d'article. [less ▲]

Régime d'imposition des indemnités perçues à la suite d'un accident du travail ou d'une maladie professionnelle et en vertu d'un contrat d'assurance 'revenus garantis'

Article for general public (2004)

Null-Subspace Analysis for Structural Damage Monitoring in Fatigue Testing of Luminaires

Conference given outside the academic context (2004)

A damage detection method of mechanical system based on output measurements only and on the subspace identification concept is presented. The method uses the definition of null subspace analysis of the ... [more ▼]

A damage detection method of mechanical system based on output measurements only and on the subspace identification concept is presented. The method uses the definition of null subspace analysis of the Hankel matrix. It is demonstrated to be sensitive to small-size structural damages and suitable for continuous on-line monitoring. The measured response records of structures under environmental or artificial vibrations are assembled in the Hankel matrix that is further factorized into special subspaces. The active subspace defined by the first principal components is shown to be orthonormal to the null subspace defined by the remaining principal components. Therefore, any evident increase of the residues signifies possible structural damages. The method is illustrated by an application to fatigue tests of a street lighting device (luminaires). Experimental methods and numerical calculations on luminaires are simply described and discussed. The test results show that the developed methods may be easily used to effectively monitor the damage evolution during the fatigue tests. [less ▲]

Finite element computation of electromechanical micro-switches and micro-pump actuators

Conference given outside the academic context (2004)

a new methodology to model the electromechanical behavior of microscale system components is presented. The original approach proposed in this paper is based on a unified FE formulation of the strong ... [more ▼]

a new methodology to model the electromechanical behavior of microscale system components is presented. The original approach proposed in this paper is based on a unified FE formulation of the strong electromechanical interaction problem, in which both the electric and the mechanical fields are considered simultaneously. To this aim, finite elements based on the Mindlin shell theory are implemented. In order to illustrate the proposed methodology, numerical results are presented on the modelling and simulation of microscale electromechanical switches and microscale pump actuators. [less ▲]

Développement durable: avis d'experts

Article for general public (2004)

To build equity indicators in a European Context

Conference given outside the academic context (2004)

Dermatophytoses - Mise au point

Conference given outside the academic context (2004)

Sélectionner du froment d’hiver spécifiquement pour le poulet de chair ?

Article for general public (2004)

L'évolution de la PAC : hier, aujourd'hui et demain ?

Conference given outside the academic context (2004)

La santé mentale, champ pertinent de l'action sociale

Article for general public (2004)

Main characteristics of Wallonian Agriculture

Speech (2004)

L'économie rurale wallonne en chiffres

Speech (2004)

Le management des connaissances: une révolution pour la GRH?

Article for general public (2004)

Etude histologique du développement d'embryons issus du croisement Phaseolus vulgaris L. x P. coccineus L.

Conference given outside the academic context (2004)

Isolation and characterisation of seven alien monosomic addition lines of Gossypium australe F. Muell. on G. hirsutum L.

Conference given outside the academic context (2004)

Molecular monitoring of the introgression in Gossypium hirsutum L. of G. sturtanium Willis genes controlling the "glanded-plant and glandless-seed" trait

Conference given outside the academic context (2004)

Etude de gènes impliqués dans l'embryogenèse de Phaseolus

Conference given outside the academic context (2004)

Copropriété forcée d'immeubles ou groupes d'immeubles bâtis

Conference given outside the academic context (2004)

Médiations, populations et institutions

Article for general public (2004)

Médias et élections aux Etats-Unis

Article for general public (2004)

Démocratie, Droit et extrême droite en Belgique

Conference given outside the academic context (2004)

Neuropsychologie de la mémoire et de l'attention : Modèles théoriques et implications cliniques

Conference given outside the academic context (2004)

La formation suivra un double objectif : d'une part, les conceptions actuelles du fonctionnement mnésique et attentionnel seront présentées, en mettant particulièrement l'accent sur les données obtenues ... [more ▼]

La formation suivra un double objectif : d'une part, les conceptions actuelles du fonctionnement mnésique et attentionnel seront présentées, en mettant particulièrement l'accent sur les données obtenues auprès de patients cérébro-lésés; d'autre part, la logique générale de l'évaluation neuropsychologique des difficultés mnésiques et attentionnelles sera abordée. [less ▲]

L’audiovisuel en Belgique francophone

Article for general public (2003)

Prix de référence pour les honoraires médico-techniques dans les hôpitaux

Diverse speeche and writing (2003)

La prostaglandine F2alpha. Voies d’utilisation et applications au traitement des endométrites chroniques chez la vache.

Conference given outside the academic context (2003)

L’histoire sacrifiée sur l’autel des langues ?

Article for general public (2003)

Le financement des centres de santé intégrés en Belgique

Conference given outside the academic context (2003)

Stimulation magnétique et reorganisation motrice apres un AVC

Article for general public (2003)

Crème, beurre et lait fermenté.

Conference given outside the academic context (2003)

Generalist vs specialist ? That's the question

Conference given outside the academic context (2003)

Formation à la rééducation vocale

Conference given outside the academic context (2003)

Marcel Thiry, poète et prosateur

Speech (2003)

La place du psychologue dans les maladies cardiovasculaires.

Conference given outside the academic context (2003)

Chicago - Le Vatican du Gospel (pt 2)

Article for general public (2003)

Consistent Vibration Analysis of Electrostatically Coupled Structures: Application to Microsystems

Conference given outside the academic context (2003)

Analysing the vibration of microsystems is a fundamental issue in the design of sensors and actuators. The state of the art currently consists in using staggered procedures based on the iteration between ... [more ▼]

Analysing the vibration of microsystems is a fundamental issue in the design of sensors and actuators. The state of the art currently consists in using staggered procedures based on the iteration between a structural model loaded by electrostatic forces and an electrostatic model defined on a domain following the deformation of the structure. Staggered iteration then leads to a static equilibrium position. Performing a perturbation analysis around the static equilibrium to evaluate the tangent stiffness for every degree of freedom leads to very high computing costs. Therefore only the tan-gent stiffness associated with assumed modes (typically the purely structural modes) is computed. Such a procedure can lead to important inaccuracies in the estimation of eigenfrequencies for designs where the electrostatic coupling is not quasi-uniform. In our work, we have developed a fully coupled electro-mechanical formulation that allows to find static equilibrium positions in a non-staggered way and which provides fully consistent tangent stiffness matrices for vibration analysis. The efficiency of the approach will be illustrated on modes of micro-electromechanical devices. The coupled electromechanical modes obtained in the vicinity of equilibrium positions can be significantly different from the approximations obtained using a structural reduction at forehand. Numerical results are checked against analytical results. The application examples highlight the fact that the strongly coupled formulation proposed here allows consistent vibration analysis of the system and yields more accurate eigenmodes and frequencies than the classical perturbed assumed mode approach. [less ▲]

Médias et luttes sociales en Belgique

Conference given outside the academic context (2003)

Tournières, jachères et insectes auxiliaires

Article for general public (2003)

Solution of topology optimization problems with sequential convex programming

Speech (2003)

Introduction to efficient solution algorithms to large scale topology optimization problems.

Neuropsychologie du développement et Mémoire

Speech (2003)

Analyse sensorielle : principes de base.

Conference given outside the academic context (2003)

"Etre créé" et "venir à l'existence". Réflexions sur l'Etre en Egypte ancienne

Conference given outside the academic context (2003)

Les médias : Quel(s) Pouvoir(s) ?

Conference given outside the academic context (2003)

Wind Excitation and Severity of Standards Used for the Vibration Testing of Luminaires

Conference given outside the academic context (2003)

Ostia Antica - Schola del Traiano. Campagna di scavo 2002.

Conference given outside the academic context (2003)