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Social Navigation in Lecture Recordings

This paper discusses the integration of social navigation in lecture recordings, detailing its benefits for user-defined exploration and search. By utilizing data from user interactions, including search history and time spent on various segments, the study presents a framework based on the 4-phases model for seamless integration into educational systems. Case studies illustrate the application of features like bookmarks and structural elements within lecture platforms. The research builds on previous findings and explores future directions for enhancing user engagement through social navigation strategies.

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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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