Ontology mapping involves the task of finding similarities among overlapping sources by using ontologies. In a Federated System in which distributed, autonomous and heterogeneous information sources must be integrated, ontologies have emerged as tools to solve semantic heterogeneity problems. In…

Semantic Web is an extension of the current web in which data contained in the web documents are machine-understandable.
On the other hand, Web Services provide a new model of the web in which sites exchange dynamic information on demand.

This document describes a research and development project - Semantic Web and Cooperative Problem Solving for Online Communities of Practice. The aim of the project is to build a system supporting Cooperative Problem Solving within the framework of online Communities…

Software tools processing partially common set of data should share an understanding of what these data mean. Since ontologies have been used to express formally a shared understanding of information, we argue that they can be used to improve integration…

Defining software requirements is a complex and difficult process, which often leads to costly project failures.
Requirements emerge from a collaborative and interactive negotiation process that involves heterogeneous stakeholders (people involved in an elicitation process such as users, analysts, developers,…

Vertical partitioning, in which attributes of a relation are
assigned to partitions, is aimed at improving database
performance. We extend previous research that is based on
a single relation to multi-relation database environment,
by including referential integrity constraints, access time

El objetivo de este artículo es examinar la relación existente entre la volatilidad de la tasa de cambio y el volumen de exportaciones, usando datos brasileños. Después de establecer la existencia de cointegración entre las variables incluidas en nuestro modelo,…

Este trabajo tiene como objetivo estimar la forma reducida de una función de oferta agropecuaria de la economía argentina en el marco de un modelo de equilibrio general. Los resultados de la estimación de la oferta agropecuaria con datos que…

This paper is an attempt to define how a
specific data structure might be used to
store, in a persistent manner, temporal
information during a computer simulation.
In particular, it considers the sort of
temporal information generated during a
discrete…

Este artículo documenta los principales patrones y tendencias de las definiciones alternativas de la informalidad laboral en América Latina y el Caribe, mediante la utilización de una gran base de datos de más de 100 encuestas de hogares para el…