Graph-based recommendation in broad folksonomies [Elektronische Ressource] / vorgelegt von Robert Wetzker

Graph-Based Recommendation inBroad Folksonomiesvorgelegt vonDiplom-IngenieurRobert WetzkerVon der Fakult at IV { Elektrotechnik und Informatik {der Technischen Universit at Berlinzur Erlangung des akademischen GradesDoktor der Ingenieurwissenschaften{ Dr.-Ing. {genehmigte DissertationPromotionsausschuss:Vorsitzender: Prof. Dr. M ollerBerichter: Prof. Dr. AlbayrakBerichter: Prof. Dr. BauckhageTag der wissenschaftlichen Aussprache: 14. Mai 2010Berlin 2010D 83AbstractThe user-centric annotation of resources by freely chosen words (tags) hasbecome the predominant form of content categorization of the Web 2.0 age.It provided the foundations for the success of now famous services, suchas Delicious, Flickr, LibraryThing, or Last.fm. Tags have proven to be apowerful alternative to existing top-down categorization techniques, as forexample taxonomies or prede ned dictionaries, which lack exibility and areexpensive in their creation and maintenance. Instead, tagging allows usersto choose the labels that match their real needs, tastes, or language, whichreduces the required cognitive e ort.Services that center on the collaborative tagging of resources are calledfolksonomies. These communities have become an invaluable source for infor-mation retrieval, since they bundle the interests of thousand or even millionsof users, magnifying the underlying domain from a user-centric perspective.