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Incorporating Participant Reputation in Community-driven Question Answering Systems Liangjie Hong, Zaihan Yang and Brian D. Davison Computer Science and Engineering Lehigh University Bethlehem, PA USA
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Liangjie Hong, Zaihan Yang and Brian D. Davison Why Community-driven Question & Answering ? SIN August 2009
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Liangjie Hong, Zaihan Yang and Brian D. Davison Why Community-driven Question & Answering ? SIN August 2009 natural language vs. short queries
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Liangjie Hong, Zaihan Yang and Brian D. Davison Why Community-driven Question & Answering ? SIN August 2009 natural language vs. short queries best answers vs. relevance
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Liangjie Hong, Zaihan Yang and Brian D. Davison Why Community-driven Question & Answering ? SIN August 2009 natural language vs. short queries best answers vs. relevance user interactions!
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Liangjie Hong, Zaihan Yang and Brian D. Davison Why Community-driven Question & Answering ? SIN August 2009 natural language vs. short queries best answers vs. relevance user interactions! 23 millions resolved questions!
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 1 – 10 of 17, 702
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Resolved
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Earth Science & Geology Physics
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Problems
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 same or similar questions different category different time Problems
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Problems Read Read them all? Trust Trust them all?
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Finding high quality answers
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Finding high quality answers content user reputation
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Finding high quality answers content user reputationuser reputation
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 HITS-like scheme User Answerer Questioner
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 HITS-like scheme User questioner - hub answerer - authority
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 PageRank-like scheme User
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 PageRank-like scheme User random jump ?
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 PageRank-like scheme User
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 PageRank-like scheme User probability of interaction
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Incorporating topics Profile User Profile
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Incorporating topics User
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Incorporating topics α -> stay 1- α -> jump topic User
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Incorporating topics α -> stay 1- α -> jump topic d -> follow link 1-d -> random jump User
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Incorporating topics User α -> stay 1- α -> jump topic d -> follow link 1-d -> random jump
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Other heuristics Z-score Linear combination
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Dataset & Evaluation Yahoo Answers! 14,122 questions + 45,814 answers 12,731 users Strict & Relaxed Precision@1, MRR, Precision@10, MAP BM25 + User Reputation
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Strict Evaluation
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Relaxed Evaluation
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 Relaxed Evaluation
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Liangjie Hong, Zaihan Yang and Brian D. Davison SIN August 2009 user reputation helps retrieval topic modeling makes sense but… question answering link direction Conclusion
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SIN August 2009 Thank you! Questions? Contact Info: Liangjie Hong hongliangjie@lehigh.edu WUME Laboratory Computer Science and Engineering Lehigh University Bethlehem, PA 18015 USA Liangjie Hong, Zaihan Yang and Brian D. Davison
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