Context-aware systems represent extremely complex and heterogeneous systems. The need for middleware to bind components together is well recognized and many attempts to build middleware for context-aware system have been made. One of the goal of this paper is to provide a general introduction about the evolution of the middlewares and than to proceed with an analysis of the requirements and the...

We introduce a first-order extension of dynamic logic (FO-DL), suitable to represent and reason about the behaviour of Data-aware Systems (DaS), which are systems whose data content is explicitly exhibited in their description. We illustrate the expressivity of the formal framework by modelling English auctions as DaS and by specifying relevant properties in FO-DL. Most importantly, we develop ...

To realize the vision of ubiquitous computing, it is important to develop a context-aware infrastructure which can help ubiquitous agents, services, and devices become aware of their contexts because such computational entities need to adapt themselves to changing situations. A context-aware infrastructure manages the context model representing contextual information and provides appropriate in...

In a mobile setting, user preferences vary in different contexts. Advances in mobile technologies have made the collection of user context information feasible, and as a result, the context-aware mobile recommender system field has been formed. Although there exist several different approaches to incorporating context into the recommendation process, context-aware recommendations are still diff...

This paper presents an interactive volume modeling method that constructs skeletal muscles from an existing volumetric dataset. Our approach provides users with an intuitive modeling interface and produces compelling results that conform to the characteristic anatomy in the input volume. The algorithmic core of our method is an intuitive anatomy classification approach, suited to accommodate sp...

For more than two decades, research in the development of context-aware applications has gained significant attention, in which the context aware should be taken into account to adapt them to the requirements of the environment and users. However, advances in application models to support the development of these systems have not kept up. Researchers have been building and deploying context-awa...

M any worry that existing privacy problems will only worsen in context-aware pervasive computing environments. 1,2 Ubiquitous sensing and the invisible form factor of embedded computing devices have made it easier than ever to collect and use information about individuals without their knowledge. Sensitive private information might live indefinitely and appear anywhere at anytime. Moreover, the...

Modeling collaboration processes is a challenging task. Existing modeling approaches are not capable of expressing the unpredictable, non-routine nature of human collaboration, which is influenced by the social context of involved collaborators. We propose a modeling approach which considers collaboration processes as the evolution of a network of collaborative documents along with a social net...