Concepts, Ontologies, and Knowledge Representation by Grega Jakus Veljko Milutinović Sanida Omerović & Sašo Tomažič

Author:Grega Jakus, Veljko Milutinović, Sanida Omerović & Sašo Tomažič
Language: eng
Format: epub
Publisher: Springer New York, New York, NY

3.3.1 Software Agents

Software agents are computer programs acting on behalf of human users or other programs. A software agent that has the ability to acquire or apply knowledge to accomplish its goals is referred to as an intelligent agent. In this section we give examples of using ontologies to support intelligent agents in pervasive computing environments and Semantic Web services.

3.3.1.1 Intelligent Agents in Pervasive Computing Environments

In pervasive computing environments, agents cooperate with each other and with other devices and services in order to support human activity, goals and needs in an “anywhere, anytime fashion” (Chen et al. 2003a). For example, the architecture of the pervasive computing environment proposed in Chen et al. (2003b) is focused around an intelligent agent referred to as Intelligent Context Broker (ICB). The task of an ICB is to establish and share a coherent model of the environment it has been put in, including other devices, agents and people. After the ICB acquires information from sensors, devices and other agents in its environment, it integrates the information from various sources into a coherent model which is eventually used for reasoning and shared with other agents.

The proposed architecture is implemented by using a set of ontologies that provide concepts relevant for modeling pervasive computing environments (Chen et al. 2003a). A part of the ontology supporting the task of an ICB is presented in Fig. 3.3. The ontology is used to model a situation in which a speaker gives an invited speech or a presentation at a meeting which takes place in a particular room in a building. Beside the speaker, the room also hosts other participants representing the audience. The ontology also provides classes that represent environmental agents which are, according to the ontology, responsible for providing environmental information, such as whether a particular room is hosting an event, which specific people are participating in the event and what their intentions are.

Fig. 3.3A part of the ontology supporting the intelligent context broker (Chen et al. 2003a)

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