User generated content published via weblogs (also known as blogs) has gained importance in the last years, and the number of globally available weblogs increases. However, a large fraction of these show low publishing activity and are rarely read. This paper is a quantitative analysis of...

Wikis as well as collaborative tagging have been subject of very intense research last years and active discussion topics in the so-called blogsphere as well. In this paper, we propose collaborative Wiki tagging based on the idea to exploit inherent semantics of the concept of link in Wiki. The...

Existing applications in visualization of blogs and online conversations have largely focused on the discovery of social networks and knowledge flows in the online space. At the same time, another class of visual spatial applications allows us to uncover the relationships between people and real...

Multimedia creation, annotation and sharing are challenging tasks especially of interdisciplinary, intercultural and intergenerational communities. We present the mobile social software Virtual Campfire to provide cross-media and cross-community support for de- and recontextualization of...