Numerical modeling of electromagnetic coupling phenomena in the vicinities of overhead power transmission lines.

Electromagnetic coupling phenomena between overhead power transmission lines and other nearby structures are inevitable, especially in densely populated areas. The undesired effects resulting from this proximity are manifold and range from the establishment of hazardous potentials to the outbreak of alternate current corrosion phenomena. The study of this class of problems is necessary for ensuring security in the vicinities of the interaction zone and also to preserve the integrity of the equipment and of the devices there present. However, the complete modeling of this type of application requires the three- -dimensional representation of the region of interest and needs specific numerical methods for field computation. In this work, the modeling of problems arising from the flow of electrical currents in the ground (the so-called conductive coupling) will be addressed with the finite element method. Those resulting from the time variation of the electromagnetic fields (the so-called inductive coupling) will be considered as well, and they will be treated with the generalized PEEC (Partial Element Equivalent Circuit) method. More specifically, a special boundary condition on the electric potential is proposed for truncating the computational domain in the finite element analysis of conductive coupling problems, and a complete PEEC formulation for modeling inductive coupling problems is presented. Test configurations of increasing complexities are considered for validating the foregoing approaches. These works aim to provide a contribution to the modeling of this class of problems, which tend to become common with the expansion of power grids.

Les reconfigurations de la mémoire du colonialisme portugais : récit et esthétisation de l’histoire

L’empire colonial est un élément central de la construction officielle de l’identité nationale portugaise. Le processus d’indépendance des anciennes colonies après le 25 avril 1974 a conduit à la reconfiguration des manières de raconter le passé. Basé sur deux études de cas, cet article prétend analyser comment des nouvelles médiations et des nouveaux récits ont été utilisés pour reconfigurer cette mémoire. Le cas de la construction biographique du joueur de football mozambicain Eusébio da Silva Ferreira, le grand héros du football portugais, et l’analyse de l’héritage de l’architecture coloniale moderne portugaise visent à démontrer le rôle que ces récits produits dans des champs d’activités spécifiques ont joué dans le maintien d’un discours portant sur la grandeur coloniale, discours qui est lui-même une dimension de l’institutionnalisation de ces champs.

Legal shifts : shaping expectations of intellectual property protection in an open innovation industrial environment

Projet de recherche réalisé en 2014-2015 avec l'appui du Fonds de recherche du Québec – Société et culture.