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1. Preface
2. Measuring Similarity of Interests for Clustering Taggers and Resources
   # Pages: 1-20
   Authors: Dichev, Christo; Xu, Jinsheng; Dicheva, Darina; Zhang, Jinghua
   Affiliations: Winston-Salem State University, USA; NC A&T, USA; Winston-Salem State University, USA; Winston-Salem State University, USA
3. Social Support for Ontological Mediation and Data Integration
   # Pages: 21-36
   Authors: Correndo, Gianluca; Alani, Harith; Salvadores, Manuel
   Affiliations: University of Southampton, UK; University of Southampton, UK; University of Southampton, UK
4. An Abstract Framework for Modeling Argumentation in Virtual Communities
   # Pages: 37-49
   Authors: Groza, Tudor;Handschuh, Siegfried; Breslin, John G.; Decker, Stefan
   Affiliations: National University of Ireland, Ireland; National University of Ireland, Ireland; National University of Ireland, Ireland; National University of Ireland, Ireland
5. Trust Modeling in a Virtual Organization Using Social Network Metrics
   # Pages: 50-61
   Authors: Kolaczek, Grzegorz
   Affiliations: Wroclaw University of Technology, Poland
6. The Impact of Customer Churn on Social Value Dynamics
   # Pages: 62-74
   Authors: Kazienko, Przemyslaw; Ruta, Dymitr; Bródka, Piotr
   Affiliations: Wroclaw University of Technology, Poland and BT Innovate, British Telecom Group, Intelligent Systems Research Centre (ISRC), UK; BT Innovate, British Telecom Group, Intelligent Systems Research Centre (ISRC), UK; Wroclaw University of Technology, Poland
7. Digital Energy: Clustering Micro Grids for Social Networking
   # Pages: 75-93
   Authors: Simonov, Mikhail; Mussetta, Marco; Zich, Riccardo
   Affiliations: Politecnico di Milano, Italy, and ISMB, Italy; Politecnico di Milano and Politecnico di Torino, Italy; Politecnico di Milano, Italy