On social semantics in information retrieval [Elektronische Ressource] / Ulli Waltinger. Technische Fakultät - AG Wissensbasierte Systeme. Center of Excellence - Cognitive Interaction Technology CITEC

On Social SemanticsIn Information RetrievalFaculty of TechnologyUniversity of BielefeldIn partial fulfilment of the requirementsto obtain the academic degree ofDr. rer. nat.submitted dissertationofUlli WaltingerfromRegensburgDate of disputation: 2010/10/08Reviewer:Prof. Dr. Alexander MehlerProf. Dr. Ipke WachsmuthiiAcknowledgementThis work would not have been possible without the support of many peo-ple. I deeply thank Prof. Dr. Alexander Mehler for supervising this thesis andfor supporting me for the past three years. He provided an inspiring and sti-mulating environment, resulting in many fruitful discussions that helped andimproved my research ambitions. I am grateful and in dept not only for hisguidance and mentorship, but also his patience and support. I want to expressmy gratitude to Prof. Dr. Ipke Wachsmuth who agreed to review this thesis ina very tight schedule and who provided useful comments and suggestions forfurther improvements. I would also like to thank the board of examiners: Dr.-Ing. Britta Wrede and PD Dr. Katharina J. Rohlfing. Many thanks are due toall of my colleagues at the Text Technology Department at Bielefeld Univer-sity, in particular Dr. Armin Wegner for valuable discussions, not to mentionRüdiger Gleim, Alexandra Ernst, Olga Pustylnikov, Dietmar Esch and TobiasFeith. Finally, I would like to thank my family, Liese, Magdalena and Theresa- my beloved girls, for the enormous support and encouragement they offeredme.