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A Context-Aware Usage CONtrol (CA-UCON) model is an extension of the traditional UCON model which enables adaptation to environmental changes in the aim of preserving continuity of usage in a pervasive computing system. When the authorisations and obligations requirements are met by the subject and the object, and the conditions requirements fail due to changes in the environment or the system context,...
Ubiquitous computing environment, as a new paradigm of the digital information era, has been introduced to respond to rapid changes in society and culture. Home and abroad studies in recent years have made rapid progress in the ubiquitous environment, and it had influence on various fields such as intelligent context aware systems. Today, technology research around the world competes for the preoccupancy...
Use Case diagrams are widely used to model system behaviour and also to represent user's interaction with the system. Context Aware Systems (CASs) are dynamic in nature and their response is based on varying parameters such as time and location. Due to this dynamic nature, such systems cannot be represented by the existing form of use case diagrams. In this paper the authors present a set of enhancements...
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