The term “Federated Databases” refers to the data integration of distributed, autonomous and heterogeneous databases. However, a federation can also include information systems, not only databases. When integrating data, several issues must be addressed. Here, we focus on the problem…

El objetivo de este artículo es revisar los métodos estándares aplicados para evaluar el control de calidad de productos cartográficos en el contexto de los sensores remotos. Adicionalmente se persigue presentar una metodología que permita evaluar la precisión posicional de…

Nowadays, data intensive applications are in constant demand and there is need of computing environments with better intelligent capabilities than those present in today's Database Management Systems (DBMS). To build such systems we need formalisms that can perform complicate inferences,…

Time and change are notions that seems unavoidable in some areas of work and investigation, languages that can deal with these notions are necessary. At the same time, methods for a proper time handling are quite complex, mainly because problem’s…

Desde la transición de España a la democracia, el
aborto ha sido asunto de políticas públicas dentro
y fuera del parlamento. En este artículo se describe
la historia de la reforma de la ley de aborto en
España desde 1979…

The term Federated Databases refers to the data integration of distributed, autonomous and heterogeneous databases. However, a federation can also include information systems, not only databases. At integrating data, several issues must be addressed. Here, we focus on the problem…

El objetivo del proyecto Portal da Língua Portuguesa es construir, con un doble
objetivo, un juego de recursos léxicos. En primer lugar, estos recursos sirven como fuente de
información para una página web sobre la lengua portuguesa para el público…

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

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…

This book provides an excellent foundation for the principles of database and data management. It explains some of the more difficult concepts fairly well. The book is meant for an introductory course in database management which is usually required as…