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Distance Education Network & Information Sciences Institute USC Viterbi School of Engineering

Distance Education Network & Information Sciences Institute USC Viterbi School of Engineering. Presented by Erin Shaw Research Computer Scientist Center for Research in Technology for Education USC Information Sciences Institute. Research @ DEN.

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Distance Education Network & Information Sciences Institute USC Viterbi School of Engineering

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  1. Distance Education Network& Information Sciences InstituteUSC Viterbi School of Engineering Presented by Erin Shaw Research Computer Scientist Center for Research in Technology for Education USC Information Sciences Institute

  2. Research @ DEN • DEN collaborates with USC research centers • Develop new technologies • Provide greater visibility for DEN • Integrated Multimedia Sciences Center • Multimedia applications • Information Sciences Institute • Collaborative technologies • Interactive simulations • Pedagogical agents

  3. Discussion board initiative Theme and Goals • Create a platform for bridging research and practice • Increase opportunities for • Learner participation and collaboration • Instructor experimentation and assessment • Support the evaluation of advanced technologies • Text mining • Mobile learning • Pedagogical agents • Natural language understanding

  4. DEN & ISI integrated system DEN Blackboard System Student Collaboration Tools ISI Discussion Board Agent Interventions Real-Time Analysis DEN File System Instructor Assessment Tools ISI Document Database Completed In Development Planned

  5. DEN Blackboard link to ISI discussion board

  6. Discussion board, Fall 2005

  7. Document-based discussion

  8. Document section-based discussion

  9. Mobile discussion via instant messaging New message notification sent User queries BBS for details

  10. AT&T Samsung x427 Cingular Nokia 3595 Working Assets Sprint LG 1200 T*Mobile Sidekick Mobile communication AOL Instant Messenger communication Worked on all phone types tested

  11. Automated question-answering Goal • Automatically answer • Repeatedly asked questions • Questions whose answers are available in course documents Traditional • Factiod questions • Who is the president of the United States? • Questions contain only one sentence • Answers can be given with short phrase Our challenge • Questions may contain multiple sentences • Questions may not be obvious • I’ve been having trouble….. Can anyone help? • Answers need explanation

  12. Automated question-answering Response Displayed Questions Posted Course Documents Feature Extraction Similarity Computation Summarization & Answer Extraction

  13. Total text available • Course documents • Include notes, assignments, web pages, readings • Segmented into sections (tiles) • Discussion threads • Individual messages manually annotated

  14. Classify 3000+ messages by speech act

  15. Compute speech act transition probabilities

  16. Probabilities constrain search space Today Display best match Next step Evaluate Relevant, useful?

  17. Thank you for your attention. Enjoy the rest of your visit! Please feel free to contact me: ErinShaw, shaw@isi.edu

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