1. Transitioning a face-to-face class to an online class / Margaret Fitzgerald-Sisk, Robert Tennyson -- 2. Standardization of virtual objects / Jordán Espada ... [et al.] -- 3. Forum summarization to support tutor and teacher in group interaction management / Antonella Carbonaro -- 4. Social networking and trust / Vladlena Benson -- 5. Using quantum agent-based simulation to model social networks / C. Bisconti ... [et al.] -- 6. An approach to a semantic recommender system for digital libraries / José Morales-del-Castillo, Eduardo Peis, Enrique Herrera-Viedma -- 7. Domain-specific ontologies trading for retrieval and integration of information in Web-based information systems / José-Andrés Asensio ... [et al.] -- 8. Technology engineering for NPD acceleration / Nouha Taifi ... [et al.] -- 9. Locating doctors using social and semantic Web technologies / Alejandro Rodríguez-González ... [et al.] -- 10. Refactoring and its application to ontologies / Jordi Conesa, Antoni Olive, Santi Caballé -- 11. Evolution in ontology-based user modeling / Jairo Francisco de Souza, Sean Siqueira, Rubens Melo -- 12. Collaborative filtering / Tania Kerkiri, Dimitris Konetas -- 13. Student models review and distance education / Avgoustos Tsinakos.