Pal, Aditya2012-11-142012-11-142012-08https://hdl.handle.net/11299/139014University of Minnesota Ph.D. dissertation. August 2012. Major: Computer science. Advisor:Joseph A. Konstan. 1 Computer file (PDF); xi, 147 pages.en-USData MiningExpert IdentificationMachine LearningMicroblogsQuestion AnsweringUser EvolutionThesis or Dissertation