This paper presents a novel system, which uses a set of video cameras to support the manual annotation of object interaction and person to object interaction within smart environments. The DANTE (Dynamic ANnotation system for smart Environments) system uses two stereo-based cameras to monitor and track objects, which are tagged with inexpensive paper based fiducial markers. Offline, the DANTE a...

The recent convergence of mobile and context-aware systems has seen a considerable rise in interest in applications that exploit aspects of the operating environment to offer services, tailor application behaviour or trigger adaptation. One area of ubiquitous computing is composed by the context-aware systems, systems where applications are designed to react to the constant changes in the envir...

Context-awareness is an interesting topic in mobile navigation scenarios where the context of the application is highly dynamic. Using context-aware computing, navigation services consider the situation of user, not only in the design process, but in real time while the device is in use. The basic idea is that mobile navigation services can provide different services based on different contexts...

I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. Abstract Context-aware systems can dynamically adapt to user situations to provide smarter services. In general, context refers to the information that ca...

In recent years, a large portion of smartphone applications (Apps) has targeted context-aware services. They aim to perceive users’ real-time context like his/her location, actions, or even emotion, and to provide various customized services based on the inferred context. However, context-awareness in mobile environments has some challenging issues due to limitations of devices themselves. Limi...

Context-aware systems have long found application in everyday use cases, assisting users with their daily lives. Technical service covers any tasks concerning the maintenance, diagnosis, and repair of industrial machinery. It is a more specific domain that would also benefit from the introduction of context-aware systems. This domain requires the filtering and consumption of a vast amount of in...

Context-aware pervasive systems are an important emerging category of software, increasingly pervading into daily life, play and work. These systems are characterized by capabilities for sensing the physical world and taking action, autonomously or in cooperation with users. This paper proposes an incremental approach to building contextaware pervasive systems, with a particular emphasis on sys...

Context-aware systems, such as in-car infotainment systems, aim at improving the interaction between computers and humans by using contextual information about the system, the user and the environment. Previous work has shown that ontologies have significant benefits for modeling such context-aware systems, e.g., when inferring knowledge. However, the potential performance impact on the overall...

Context-aware systems sense the user’s situation and provide an interaction that adapts and behave accordingly. To reach a level of user’s satisfaction the systems need to be aware of activity context (i.e. what user is doing?). To sense the activity context the popular methods are hardware sensors for example tracking devices etc. or recordings of the behaviour which occurred in the past. Howe...

Building intelligent environment is one of crucial challenges for ubiquitous computing developers. To make the environment adapt rationally according to the desire of users, the system should be able to guess users’ interest, by learning users’ behavior, habit or preference. While learning the user preference, dealing with uncertainty and conflict resolution is of the utmost importance. When ma...