Ce mémoire s'emploie à étudier les corps quadratiques réels ainsi qu'un élément particulier de tels corps quadratiques réels : l'unité fondamentale. Pour ce faire, le mémoire commence par présenter le plus clairement possible les connaissances sur différents sujets qui sont…

The analysis of high sports performance by means of technological advances has often been used to calculate the routes of sportsmen in the distances covered, or to calculate speed in orienteering. However, there is still little information on data for…

One of the key aspects in the design of an architecture for autonomous agents is the way in which beleifs are revised in the face of new information. An intelligent agent must be prepared to handle new information (be it…

This work extends the semantics and implementation of fuzzy prolog presented in [VGM02] in order to include Default Knowledge capability. The new semantic allows non-uniform default assumptions and has Closed World Assumption (CWA) and Open World Assumption (OWA) as particular…

Using an audiovisual perception task, two groups of native English listeners
(monolinguals, and L2 learners of Spanish) were asked to identify
which /p,t,k/ tokens had been produced by native English speakers
and which ones by foreigners. The experiment found that…

This article presents the confluence of two general ideas: Defeasible Logic Programming (DeLP, an argumentation based formalism for representing knowledge and reasoning) and Abduction in logic. In first place, we introduce a framework that formally states the problem of doing…

Scientific knowledge and skills acquired by students during pre-university education has diminished since legislative changes were introduced in Spain during the 1990's. As a result, education in the field of science is suffering. Some initiatives are currently underway in Great…

El principal objetivo de este trabajo es reflexionar sobre la concepción epistemológica y las posibilidades descriptivo-explicativas de las disciplinas integrantes del área de conocimiento de “Teoría de la Literatura y Literatura Comparada”. Para ello damos cuenta de la configuración de…

Data mining is at the core of the knowledge discovery process. However, an initial preprocessing step is crucial for assuring reliable results within this process. Preprocessing of data is a time-consuming and non-trivial task since data quality issues should be…

Ce mémoire décrit et analyse différents types de systèmes d'échange de droits d'émission utilisés dans le
cadre de politiques de gestion de la pollution atmosphérique. L'objectif premier est de répertorier des enjeux
juridiques étant liés à l'efficacité de ces systèmes.