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Context-awareness is a central aspect of pervasive computing applications. However, the information representing a context evolves with the capability of the technology embedded in pervasive devices. As a consequence, access control systems should be able to support and understand any new context information in order to address access control requirements. In this article, we present an extensible...
In previous work we have proposed a rule-based platform to support context-aware service development. Rules are used to detect relevant situations in the users' context and to trigger actions in response to context changes. Rule-based solutions offer flexibility with respect to service maintainability, since rules can be modified and added at runtime. However, rule-based systems are often criticized...
As ubiquitous virtual reality (U-VR) systems become more and more popular and several systems coexist all together, sharing events between them in order to improve the user experience and increase their scope and functionality will be mandatory. Since U-VR systems have a dynamic and decoupled nature, and they have their own event model, we propose in this paper a semantic publish/subscribe infrastructure...
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