Overview of Adaptive Navigation Technologies Michal Tvarožek...

Overview of Adaptive

Navigation Technologies

Michal Tvarožek

[email protected], FIIT STU BA

mailto:[email protected]

23. 11. 2005 Overview of Adaptive Navigation Technologies

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Presentation outline

• Navigation?

• Motivation

• Sources of adaptation

• Adaptive hypermedia technologies

• Adaptive navigation support

• Summary


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Navigation?

• Navigation (colloquially called surfing) :the activity of following links and browsing web pages

• User needs

– Informational (acquire information)

– Navigational (find a site to start from)

– Transactional (perform an action)

• Why is navigation necessary?


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Motivation

• The navigation problem – “Lost in hyperspace”

• Existing solutions

– Search engines

– Back button

– History

– Bookmarks

• Why is this still not enough?

• Adaptive hypermedia


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Sources of adaptation

• User’s knowledge (what I know)

• User’s goals (what I want to do)

• User’s background (what I am)

• User’s experience (my knowledge of hyperspace)

• User’s preferences (what I like)


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Adaptive hypermedia applications

• Educational hypermedia systems (ISIS-Tutor)

• On-line information systems (HYPERFLEX)

• On-line help systems (EPIAIM, SYPROS)

• Information retrieval hypermedia (WebWatcher)

• Institutional hypermedia (Hynecosum)

• Personalized views (Information islands)


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Adaptive hypermedia technologies


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Adaptive navigation support

• Global guidance

• Local guidance

• Local orientation support

• Global orientation support

• Direct guidance

• Adaptive link sorting

• Adaptive link hiding

– Hiding

– Disabling

– Removal

• Adaptive link annotation

• Adaptive link generation

• Map adaptation


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Adaptive navigation overview


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How is it done?

• Trails

– Authored trails (explicitly defined)

– Derived trails (derived from a query or ontology)

– Emergent trails (from repeated navigation)

• Dynamic search

– Fish search

– Shark search

– Info-Spiders


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Examples:Adaptive annotation (ELM-ART)


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Examples:Adaptive annotation (InterBook)


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Examples:HyperBook Authoring (MetaLinks)


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Examples:Adaptive annotation


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Summary

• Potential problems

– Some approaches are more useful than others for different scenarios

• Future trends

– Integration with other applications

– Open corpus adaptive hypermedia

– Mobile hypermedia (handheld devices)


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References

• Peter Brusilovsky

– Adaptive navigation support (PsychNology Journal 2004)

– Adaptive Hypermedia (umuai 2001)

– Methods and techniques of adaptive hypermedia (umuai 1996)

• Navigating the World-Wide-Webhttp://citeseer.ist.psu.edu/levene03navigating.html

http://citeseer.ist.psu.edu/levene03navigating.html

http://citeseer.ist.psu.edu/levene03navigating.html

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