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Social Navigation in Lecture Recordings Robert Mertens rmertens@uos.de
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1 Lecture Recording in General 1 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 Preparation Live-Talk and Recording Post-Processing Usage
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2 Workflow Web-/ VideoServer Generator Real- Converter Camera and Microphones MPEG-Recording Stud.IP-Server Presentation Computer Real- Video Powerpoint- Presentation, Metadata Start/Stop Recording Presentation Link to the recording MPEG2-Video Contact LMS Configuration + MPEG-Computer-IP Lecture Hall Computing Center Upload
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3 Hypermedia Navigation Fulltext-Search Footprints Bookmarks Structural elements Backtracking Combined
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4 Hypermedia Interface Fulltext-Search Footprints Bookmarks Structural elements Backtracking
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5 Structural Elements Slide 1 Item 1 Punkt 2 Slide 1 Item 1 Item 2 Slide 2 Item 1 Slide 1 Punkt 1 Punkt 2 Slide 1 Item 1 Item 2 Slide 2 Item 1 Slide 2 Item 1 Slide 2 Item1 Slide 2 Item 1
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6 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
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7 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)
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8 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).
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9 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
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10 Different Application Scenarios
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11 First Concept for Level IV Integration Analyze viewing time Categorization by week of session Letting it work on bookmarks, too? Problem: Time vs. structure
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12 Time and Structure
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13 Visualization number of views
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14 Discussion Thank you for your attention
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15 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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16 Ahn, Brusilovsky & Farzan 2005] use traffic and annotation for social navigation
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17 p36-dieberger_social_Navigation nochmal befragen Die variable Foliengroesse mit Scripting mal ansprechen
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