Descripción: Universidade Nova de Lisboa. Departamento de Informática «My main research interests are within the area of Artificial Intelligence. More specifically, my interests have been focused on Logic Programming, Non-Monotonic Reasoning, Knowledge Representation, Model Based Diagnosis. Recently, a great part of my research work is directed towards the problem of Knowledge Base Updates and on Evolution and Reactivity in the Web this latter topic being the main focus of a working group of EU project Rewerse.»