Ubiquitous computing systems can be regarded as open systems where heterogeneous and previously unknown entities may spontaneously interact, due to intrinsic mobility of users and...
Collaborative work environments for scientific knowledge have many applications in research as well as in education. Such systems already exist (e.g. Wikipedia and PlanetMath), b...
Semantic Web Fred, SWF for short, is a contextindependent, goal-driven system for automated execution of tasks that are delegated to electronic representatives along with dynamic ...
Michael Stollberg, Dumitru Roman, Ioan Toma, Uwe K...
While designing a service-oriented system, deciding whether a service interaction is desired or harmful is a subjective choice which depends on the requirements expressed by the us...
—We propose an access control model that extends RBAC (Role-Based Access Control) to take time and location into account, and use term rewriting systems to specify access control...