El mes de diciembre de 1926 conoció una de las grandes situaciones de frío y nieve que han azotado las tierras ibéricas a lo largo del siglo XX. La nevada de las navidades de 1926-27 forma, junto a las oleadas…

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The aim of this work is to relate two apparently independent concepts as belief revision and relevance. We propose a formal characterization for the notion of (ir)relevance by means of a set of postulates. Then we define (ir)relevance using change…

One of the more recent and alluring phrases used by development and resource management practitioners and theorists is "traditional ecological knowledge." Although there is a substantial amount of the literature on this subject, these studies have unfortunately an inadequate characterization…

O processo de Descoberta de Conhecimento em Bancos de Dados Geográficos (DCBDG) busca encontrar padrões, informações e relacionamento espacial implícitos em dados descritivos e espaciais armazenados em bancos de dados geográficos. Este tipo de descoberta é muito importante para o…

While theory formation and the relation between theory and data has been investigated in many studies of scientific reasoning, researchers have focused less attention on reasoning about experimental design, even though the experimental design process makes up a large part…

The purpose of this study is to investigate a series of issues around the primary theme of value constructions and the ways that these influence the construction of interior spaces and impact on its occupants. The ways in which knowledge…

Dans ce mémoire, nous décrivons le travail effectué pour étendre nos connaissances sur les sources d’instabilité instrumentales en imagerie de résonance magnétique, en particulier dans le domaine anatomique par une étude où cinq adultes ont été scannés quatre fois dans…

To find a good termination criterion for genetic algorithms is a difficult and frequently ignored task. In most instances the practitioner stops the algorittm after a predefined number of generations or function evaluations. How this number is established? This stop…

The development of isolated agents involves the manipulation of components such as actions, mental attitudes and decisions. Multi-agent systems have to deal with these components from different agents, without to forget the privacy and autonomy of each agent. For programming…