In our everyday life, we communicate with each other within a certain context; our actions are also within a certain context. Events affect every aspect of human life. The importance of the context also influences how we interact with the environment and how technologies provide services for us. The Context is generally regarded as data or information which describes the situation that is relev...

In context-aware systems, one of the main challenges is how to model context uncertainty well, since perceived context always yields uncertainty and ambiguity with consequential effect on the performance of context-aware system. To handle uncertainty in context-aware systems, firstly, we should know from where uncertainty comes. In this paper, we argue that uncertainty comes from several source...

..........................................................................................................................i Declaration .................................................................................................................. iii Acknowledgements....................................................................................................... iv

Intention-aware systems integrate aspects of context-aware and attentionaware systems for the identification and support of intention. Focusing intention is justified by the impact of intention on awareness and interaction with the world. Therefore, proactive user support mechanisms can be improved by including a representation of intention. In this paper, the externalization of intention in ta...

Intention-Aware systems are introduced as a system class which enables user support based on intention detection. Thereby, intention-aware systems build on the user-centric support approach of attention-aware systems and the environmentcentric support approach of context-aware systems. A framework for intention-aware systems is proposed, highlighting the importance of a task model. We review 16...

As context-aware systems have grown in sophistication, they have adopted more complex contextual models. This paper steps back from the details of model contents and composition and investigates how personal and group models can be evaluated. A specific method is proposed that leverages the transition in the user’s cognitive state between “ready-at-hand” and “present-at-hand.”

Context-awareness refers to systems that unobtrusively adapt to the environment of their users on the basis of context information, popularly known as contextaware systems. One inherent property of context information is that it possesses a certain quality, such as the certainty with which it has been determined and so on. Different aspects of this quality are represented by a set of indicators...

Technological progress has made it possible to interact with computer systems and applications anywhere and any time. It is crucial that these applications are able to adapt to the user, as a person, and to its current situation, whatever that is. Contextual information and a mechanism to reason about it have demonstrated an important potential to provide solutions in this respect. This paper a...