The appearance and continuous growth of virtual communities on the web imposes the challenge of coping with the large amount of information and knowledge these communities produce. The Semantic Web with its set of standards and technologies provides the basic…

Frequently we become amazed with the increasing number of problems to be solved that fiourish while facing daily activities. Often, related to these problems we llave also an incredible amount oí data. Since we cannot allways afford time and resources…

The notion of context and its importance in knowledge representation and nonmonotonic reasoning was first discussed in Artificial Intelligence by John McCarthy.
Ever since, contexts have found many applications in developing knowledge-based reasoning systems.
Defeasible argumentation has gained wide acceptance…

The problem of speeding up ínference has proved to be important in argumentative systems. When computing dialectical structures, several paths are searched (called argumentation lines), many of which will eventually prove useless. Morover, the performance of backward chainers degrades quickly…

Processes of spatial mobility among the Mbya are of interest in anthropological and ethnobiological studies, as these processes are related to transformations in the landscape and the environment. Despite this, ethnographic literature usually focuses itself on the mobility of Guaraní…

The matrix connection method (MCM) is an alternative procedure for theorem proving than the usual resolution technique. We already have used the MCM for finding models in a real-time knowledge-based system generator. In this paper, we adapt the MCM to…

En un contexto educativo, hay esencialmente dos modos de aprovechar la capacidad de proceso y almacenamiento de una computadora: a) producir sistemas basados en el conocimiento (tales como servicios de Internet WWW, enciclopedias multimedia, etc.) en los que el usuario…

In this study we propose the standard modal logic KD43 as the logle governing expressions about Utopia. We define a formal construction corresponding to Utopian expressions In ordlnary language that we name utopian eonditionals.
They possess the singular properties of…

La antropología económica nace presuponiéndose como una interdisciplina, un intercambio de conceptos, información y conocimientos entre las ciencias económicas y las antropológicas. En este trabajo analizamos primeramente algunos de sus problemas fundantes y las proyecciones de tales tópicos en las…

Analiza las políticas sanitarias del gobierno de Domingo Alfredo Mercante (1946-1952) – mano derecha de Juan Domingo Perón – en la provincia de Buenos Aires, Argentina, atendiendo a lo que fue una de sus más instigantes líneas de intervención: la…