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- Classical knowledge representation methods traditionally work with established relations such as synonymy, hierarchy and unspecified associations. Recent d...Classical knowledge representation methods traditionally work with established relations such as synonymy, hierarchy and unspecified associations. Recent developments like ontologies and folksonomies show new forms of collaboration, indexing and knowledge representation and encourage the reconsideration of standard knowledge relationships. In a summarizing overview we show which relations are currently utilized in elaborated knowledge representation methods and which may be inherently hidden in folksonomies and ontologies.
- This paper presents a work in progress whose purpose is to model the handled, acquired, correct and erroneous knowledge of individual learners engaged in...This paper presents a work in progress whose purpose is to model the handled, acquired, correct and erroneous knowledge of individual learners engaged in learning activities through virtual learning environments. This knowledge is represented according to a cognitivecomputational model which also serves to represent the domain knowledge via an authoring tool. The latter generates structures that allow the tutor to provide an effective feedback to improve significantly the cognitive level of the learner.
- EulerView incorporates a non-hierarchical classication structure to enable enhanced resource management. We apply the EulerView concept to the use of ur...EulerView incorporates a non-hierarchical classication structure to enable enhanced resource management. We apply the EulerView concept to the use of urls, constructing eli.icio.us which is a tool that realizes the EulerView concept and integrates it with del.icio.us. Currently, in del.icio.us, users can tag urls and browse for similar urls and the results can be displayed via an alphabetically sorted tag cloud. As well as facilitating easy tag management, using an EulerView display has the advantage that the user can use this representation for both tagging urls and for searching or browsing tasks, thus reducing any cognitive dif
- Recently, web browser based applications have become very popular in many domains. However, the specific requirements of interactive Information Visuali...Recently, web browser based applications have become very popular in many domains. However, the specific requirements of interactive Information Visualization (InfoVis) applications in terms of graphics performance and interactivity have not yet been investigated systematically in this context. In order to assess browser-based application platforms, we provide a systematic comparison of server-based rendering, Java applets, Flash, and Silverlight from several points of view. We aim to aid InfoVis developers in choosing the appropriate technology for their needs.
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