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Acknowledged as important factors for business environments operating as virtual organizations (VOs), trust and reputation are receiving attention also in Grids devoted to scientific applications where problems of finding suitable models and architectures for flexible security management of heterogeneous resources arise. Being these resources highly heterogeneous (from individual users to whole organizations...
In pervasive computing environment, collaboration between participants and interacts between applications are key characters of pervasive computing. In order to support those collaborative activities, we propose an ontology based workflow centric collaboration system modeling method. We build the collaboration system models in different abstraction layers according to domain related degree. Based...
As database applications have become more sophisticated, the development of support tools for database design has become more critical. Before support tools can be developed, however, the nature of database design problems and their solutions must be well defined. We apply data modelling principles to these tasks. The result is a multi level model of databases. The logical level describes database...
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