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Social Navigation in Lecture Recordings

Social Navigation in Lecture Recordings. Robert Mertens rmertens@uos.de. Usage. Post-Processing. Preparation. Live-Talk and Recording. Lecture Recording in General 1.

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Social Navigation in Lecture Recordings

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  1. Social Navigation in Lecture Recordings Robert Mertens rmertens@uos.de

  2. Usage Post-Processing Preparation Live-Talk and Recording Lecture Recording in General1 1 according to the 4-phases-model in: Wolfgang Hürst, Rainer Müller, Thomas Ottmann: The AOF Method for Production, Use, and Management of Instructional Media Proceedings of ICCE2004: International Conference on Computers in Education, Melbourne, Australia, December 2004

  3. MPEG-Recording Presentation Start/Stop Recording MPEG2-Video Configuration + MPEG-Computer-IP Lecture Hall Computing Center Contact LMS Powerpoint-Presentation, Metadata Web-/ VideoServer Upload Upload Real- Video Real- Converter Link to the recording Stud.IP-Server Workflow Camera and Microphones Presentation Computer Generator

  4. Hypermedia Navigation • Fulltext-Search • Footprints • Bookmarks • Structural elements • Backtracking Combined

  5. Hypermedia Interface • Fulltext-Search • Footprints • Bookmarks • Structural elements • Backtracking

  6. Structural Elements • Slide 1 • Punkt 1 • Punkt 2 • Slide 2 • Item 1 • Slide 1 • Item 1 • Item 2 • Slide 2 • Item 1 • Slide 1 • Item 1 • Punkt 2 • Slide 2 • Item1 • Slide 2 • Item 1 • Slide 1 • Item 1 • Item 2 • Slide 2 • Item 1

  7. Interface Implementation I - SVG and JavaScript • animations in SVG are start-and-forget (text-search and footprint-bar) • SVG can be modified on display and saved on the server • SVG represents its contents symbolically • Interaction between SVG and JavaScript

  8. Interface Implementation II – storing interaction data • old version and offline-medium save interaction data in cookies • new version uses a mysql database • Login required (easier way: cookies with login or integration with LMS)

  9. Why social navigation in lecture Recordings ? • Social navigation offers a user-defined, alternative structure for search and exploration. • Can use other people’s search history [Ahn, Brusilovsky & Farzan 2005]. • TSR (Time Spent Reading) [Farzan & Brusilovsky 2005] as an unobtrusive measurement (more accurate with lecture recordings).

  10. Where to add Social Navigation? (Levels) • Courses (I) • Integration into other system • Sessions (II) • Integration into other system (see [Hürst 2003] for issues regarding search engines for lecture recordings) • Sequences of slides (III) • Integration into other system (again: [Hürst 2003]) (Externalized Bookmarks) • Arbitrary intervals of a session (IV) • Visualization in the interface

  11. Different Application Scenarios

  12. First Concept for Level IV Integration • Analyze viewing time • Categorization by week of session • Letting it work on bookmarks, too? • Problem: Time vs. structure

  13. Time and Structure

  14. number of views Visualization

  15. Discussion Thank you for your attention

  16. Literature • [Ahn, Brusilovsky & Farzan 2005] Ahn, J., Brusilovsky, P., and Farzan, R: Investigating Users Needs and Behavior for Social Search. In: Brusilovsky, P., Callaway, C. and Nürnberger, A. (eds.) Proc. of Workshop on New Technologies for Personalized Information Access  at 10th International User Modeling Conference, UM 2005, (Edinburgh, July 24-25, 2005), 1-12 • [Farzan & Brusilovsky 2005] Farzan, R. and Brusilovsky, P: Social navigation support in E-Learning: What are real footprints. In: Anand, S.S. and Mobasher, B. (eds.) Proc. of IJCAI'05 Workshop on Intelligent Techniques for Web Personalization, (Edinburgh, U.K., August 1, 2005), 49-56 • [Hürst 2003] Hürst, W.: Indexing, Searching, and Skimming of Multimedia Documents Containing Recorded Lectures and Live Presentations. Extended abstract of a demonstration at ACM Multimedia 2003, Berkeley, CA, USA, November 2003.

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