The rising popularity of the social web and the associated change of static websites and their content towards open platforms of social sharing, collaboration, and user-generated data confront knowledge-intensive business service providers with the question what role social software plays as a...

Wikis have their seeds in the easy collaborative editing and maintenance of web pages. This was picked up by tremendously successful public projects such as the online encyclopedia Wikipedia. Creating, modifying and maintaining of wiki articles implies social structures and dependencies between...

Thematic portals are sites where subject matter experts select and organize information and, consequently, they can be described as top-bottom structures. While challenging this schema, implementing social information retrieval systems and social network representation features can improve user...

The quality of the current tagging services can be greatly improved if the service is able to cluster tags by their meaning. Tag clouds clustered by higher level topics enable the users to explore their tag space, which is especially needed when tag clouds become large. We demonstrate TagCluster...

In this position paper we present a vision of how the stories that people tell in Internet weblogs can be used directly for automated commonsense reasoning, specifically to support the core envisionment functions of event prediction, explanation, and imagination. -- Knowledge acquisition ;...

The importance of comprehensive annotations for learning resources is widely recognized. However, it is often unclear how these annotations should be created. A promising solution might be that learners annotate learning resources during execution of learning processes. This paper examines...