Context-aware systems offer entirely new opportunities for application developers and for end users by gathering context information and adapting systems behavior accordingly. Several context models have been defined and various context-aware middleware has been developed in order to simplify the development of context-aware applications. Unfortunately, the development of an application by usin...

Context-aware computing is a mobile computing paradigm in which applications can discover and take advantage of contextual information (such as user location, time of day, nearby people and devices, and user activity). Since it was proposed about a decade ago, many researchers have studied this topic and built several context-aware applications to demonstrate the usefulness of this new technolo...

This paper presents a scheme for the dynamic generation of context rules which are useful for modifying the behaviour of mobile devices according to the social and physical settings of their users. Existing context-aware systems employ a pool of predefined rules which will be executed whenever a context of interest is sensed and captured. Defining rules at design time, however, has the followin...

A context-aware system provides services based on the current context of the environment and user activities. So, context management and reasoning in context-aware systems are important tasks. A formal context model based on ontology can play a vital role in facilitating reasoning by formally representing domain knowledge. This paper presents an ontology-based reusable generic context model for...

Mandatory access control models have traditionally been employed as a robust security mechanism in multilevel security environments such as military domains. In traditional mandatory models, the security classes associated with entities are context-insensitive. However, context-sensitivity of security classes and flexibility of access control mechanisms may be required especially in pervasive c...

Context-aware computing is a mobile computing paradigm in which applications can discover and take advantage of contextual information (such as user location, time of day, nearby people and devices, and user activity). Since it was proposed about a decade ago, many researchers have studied this topic and built several context-aware applications to demonstrate the usefulness of this new technolo...

The Ambient Intelligence (AmI) vision implies the concept of “smart spaces” populated by intelligent entities. While most implementations focus strictly on local applications of “AmI”, we think of an AmI scenario as a federation of instances of local and application AmI domains. In order to deal with distributed context handling in AmI domains, we propose a context model suitable for distribute...