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…

El estrés oxidativo juega un papel importante como cofactor en la patogénesis del virus de la inmunodeficiencia humana (VIH). Los individuos infectados con VIH desarrollan además deficiencia en micronutrientes antioxidantes que recrudecen aún más el estado redox. En la era…

Este trabalho foi conduzido na Comunidade de Vila Cachoeira, município de Ilhéus, Bahia, no período de setembro de 2000 à maio de 2001, tendo como objetivo analisar o resgate do conhecimento da comunidade sobre o uso de plantas medicinais. Foram…

Las plantas medicinales y sus preparaciones farmacéuticas tienen cada vez mayor aceptación por parte del personal de salud y de la población en general. Su utilización se concentra fundamentalmente en la Atención Primaria de Salud, donde contribuyen a resolver muchos…

The objective of the experiments described in this thesis is to perform a detailed spectroscopic study of the dynamics on the A and X state surfaces of 13C2H2 in order to further understand the acetylene - vinylidene isomerization process in…

Most neural network learning algorithms cannot use knowledge other than what is provided in the training data. Initialized using random weights, they cannot use prior knowledge such as knowledge stored in previously trained networks. This manuscript thesis addresses this problem.…

La presente Tesis Doctoral tiene como objetivo general el empleo de sistemas sensoriales de visión y fuerza conjuntamente para realizar el guiado de robots en aquellas tareas en las que no solo se requiere controlar la trayectoria del robot sino…

The proper interpretation of measurements from an optical fiber sensor requires a full understanding of its mechanical response to external action and the corresponding change in optical output. To quantify the mechanical behavior it is necessary to know the mechanical…

In recent years, researchers in artificial intelligence have become interested in replicating human physical reasoning talents in computers. One of the most important skills in this area is predicting how physical systems will behave. This thesis discusses an implemented program…

This paper describes a system for the computer understanding of English. The system answers questions, executes commands, and accepts information in normal English dialog. It uses semantic information and context to understand discourse and to disambiguate sentences. It combines a…