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Slides from the presentation I gave at 5th Annual Conference on Teaching & Learning: Learning Technologies, June 7/8, 2007
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Search and Browsing Cycle for Knowledge
Discovery and LearningSebastian Ryszard [email protected]
DERI, NUI Galway
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Search and Browsing Cycle for Knowledge
Discovery and LearningSebastian Ryszard [email protected]
DERI, NUI Galway
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Take away message
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Take away message
• We search in different ways for different things
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Take away message
• We search in different ways for different things
• Keyword search is not enough
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Take away message
• We search in different ways for different things
• Keyword search is not enough
• We create the knowledge by sharing our (search) experience
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Outline
• Motivation
• How do people search
• Search and Browsing life-cycle
• Applying semantics and making use of social networks:
• Keyword-based search
• Faceted Navigation
• Collaborative Filtering
• Conclusions
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Motivation
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Motivation
How to discover and integrate knowledge coming from both formal and informal sources?
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Motivation
How to share and interconnect knowledge among people?
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How do people search?
• Different user goals:
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How do people search?
• Different user goals:
– Resource Seeking - the user wants to find a specific resource (e.g. lyrics of a song, a program to download, a map service etc.)
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How do people search?
• Different user goals:
– Resource Seeking - the user wants to find a specific resource (e.g. lyrics of a song, a program to download, a map service etc.)
– Navigational - the user is searching for a specific web site whose URL s/he forgot
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How do people search?
• Different user goals:
– Resource Seeking - the user wants to find a specific resource (e.g. lyrics of a song, a program to download, a map service etc.)
– Navigational - the user is searching for a specific web site whose URL s/he forgot
– Informational - the user is looking for information about a topic s/he is interested in
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Search and browsing
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Search and browsing
• Why?
• Knowledge can be useful
• Not everything is a useful knowledge
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Search and browsing
• Why?
• Knowledge can be useful
• Not everything is a useful knowledge
• How? (Search and browsing actions)
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Search and browsing
• Why?
• Knowledge can be useful
• Not everything is a useful knowledge
• How? (Search and browsing actions)
– [REUSE] keyword-based search (resource seeking)
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Search and browsing
• Why?
• Knowledge can be useful
• Not everything is a useful knowledge
• How? (Search and browsing actions)
– [REUSE] keyword-based search (resource seeking)
– [REDUCE] faceted navigation (navigational)
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Search and browsing
• Why?
• Knowledge can be useful
• Not everything is a useful knowledge
• How? (Search and browsing actions)
– [REUSE] keyword-based search (resource seeking)
– [REDUCE] faceted navigation (navigational)
– [RECYCLE] collaborative filtering (informational)
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Keyword-based search
Why is it not enough?
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Keyword-based search
Why is it not enough?
• Too many results (low precision)
• One needs to specify the exact keyword (low recall)
• How to distinguish between: Python and python? (high fall-out)
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Keyword-based search
How we can improve?
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Keyword-based search
How we can improve?
• Disambiguation through a context
• Long-term: user’s interests, engine type
• Short-term: user’s goal, location, time
• Query
• Query refinement
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Keyword-based search
What’s next?
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Keyword-based search
What’s next?
• “Tell me why” button and the transcript of refinement process
• Continue to faceted navigation
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Faceted navigation
Why we need that?
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Faceted navigation
Why we need that?
• The search does not end on a (long) list of results
• The results are not a list (!) but a graph
• „Lost in hyper-space”
• A need for unified UI and services for filter/narrow and browse/expand services
• Share browsing experience – navigate collaboratively
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Faceted navigation
How we do better?
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Faceted navigation
How we do better?
• A set of navigation services: access, search, filter, similar, browse, and combine
• Auxiliary services: meta, context, and statistics
• Zoom-able, adaptable, and accessible user interface
• Engage users in collaborative browsing
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Browsing the data graph
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Browsing the data graph
MultiBeeBrowse exploits interconnected data ...
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Browsing the data graph
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Browsing the data graph
... to allow faceted navigation
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Social Semantic Collaborative Filtering
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Social Semantic Collaborative Filtering
Why do we need collaboration?
• The bottom-line of acquiring knowledge: informal communication (“word of mouth”)
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Social Semantic Collaborative Filtering
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Social Semantic Collaborative Filtering
How can that help?
• Everyone classifies (filters) the information in bookmark folders (user-oriented taxonomy)
• Peers share (collaborate over) the information (community-driven taxonomy)
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Social Semantic Collaborative Filtering
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Social Semantic Collaborative Filtering
What do we got?
• Knowledge “flows“ from the expert through the social network to the user
• Systems amass a lot of information on user/community profile (context)
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Social Semantic Collaborative Filtering
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Social Semantic Collaborative Filtering
What problems can we encounter?
• The horizon of a social network (2-3 degrees of separation)
• How to handle fine-grained information (blogs, wikis, etc.)
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Social Semantic Collaborative Filtering
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Social Semantic Collaborative Filtering
How to solve them?
• Inference engine to suggest knowledge from the outskirts of the social network
• Support for Semantically Interlinked Online Communities (SIOC) metadata
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Social Semantic Collaborative Filtering
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knows
include
bookmark
Social Semantic Collaborative Filtering
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knows
include
bookmark
Social Semantic Collaborative Filtering
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Putting it all together
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Putting it all together
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Putting it all together
refinesearch results
filter, record, annotate, and share results and actions
user profile:user’s interests
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Putting it all together
user profile:recent actions
refinesearch results
filter, record, annotate, and share results and actions
re-call shared actions
user profile:user’s interests
filter, record, annotate,
and share results
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Search and Browsing in e-Learning space
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Search and Browsing in e-Learning space
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Search and Browsing in e-Learning space
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Search and Browsing in e-Learning space
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Search and Browsing in e-Learning space
Sebastian Ryszard KrukeLearning Cluster
DERI, NUI Galway
http://elite.deri.org/http://www.corrib.org/
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