linc catalog research dr. kan min-yen dr. danny c.c. poo
TRANSCRIPT
LINC Catalog Research
Dr. Kan Min-YenDr. Danny C.C. Poo
16 June 2004 LINC Catalog Research 2
Outline
IntroductionNUS Query LogsResults so far
Current ResearchCurrent GrantsResearch Needs
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Ranganathan’s Five Laws
Books are for use.For every reader, his or her book. For every book, its reader. Save the time of the reader. Library is a growing organism.
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Ranganathan’s Five Laws
Books are for use.For every reader, his or her book.For every book, its reader.Save the time of the reader.Library is a growing organism.
Address these issues through optimizing catalog access
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Who are we?
Dr Kan Min-Yen
Dr Danny Poo
Roopak Selvanathan, Programmer
Kalpana Kumar, UROP student
Ng Meichan, HYP student Tan Siru, HYP student Qiu Long, PhD student
Jeffry Komarjaya, HYP student
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Query Logs
Thanks to youUse to learn about query styles About 300 day’s worth of simple queries
Queries: Average length: 2.8 words Average query repeated: 2.1 times
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Innopac Properties
No spelling correctionWeak query expansionNo capability to track sessionsCase insensitiveStopwords also searched for (e.g. ‘the’)Advanced queries rarely usedSorting could be improved
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Innopac Properties
No spelling correctionWeak query expansionNo capability to track sessionsCase insensitiveStopwords also searched for (e.g. ‘the’)Advanced queries rarely usedSorting could be improved
Past Milestones
June 2003 – June 2004
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Framework for LINC Research
Need: Automated way to send queries to LINC Tracking of sessions and transactions by user Distinguish queries sent by research and real
users
Solution: Build a mirror system at SoC that will send
queries to LINC but track queries
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Mirror (http://linc.comp.nus.edu.sg)
Allows: Automated sending of simple queries Tracks sessions of users by IP address and
time Distinguishes in LINC logs which queries sent
by research from those sent by real users
Command line and Web invocationProgrammer: Roopak Selvanathan
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LCSH-based query expansion
Find relevant books with same subject headings as initial retrieval set
~30% improvement over original search Student: Jeffry Komarjaya To be presented at ECDL 2004
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Author spelling correction
Spelling correction Uses a dictionary and an author name list
retrieved from LINC. Corrects words with one non-initial letter
mistake.
Weakness: corrections not rankedStudent: Qiu Long / Kalpana Kumar
Questions so far?
Current Research Projects
June 2004 – January 2005
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Morphological Query Expansion
Suggest alternative form of query using different morphology bacterial foraging foraging bacteria
international tax avoidance avoiding international taxes
Look for classes of word where morphological expansion is productive
Student: Tan Siru
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Phrase structure expansion
Improve precision using phrasal knowledge air pollution pollution of air precast concrete structures (precast concrete) structures
Use mutual information to determine significant collocations
Will work together with morphing unit
Student: Ng Meichan
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Subject spelling correction
Build upon current system to do subject based spelling correction Add ranking of corrections using likelihood of
mistake Suggest repair of catalog entries with
misspellings
Student: Kalpana Kumar
Current Grants and Future targets
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Corpus-Based Query Expansion
Internal SoC project, emphasis on using the query logs
2 year project, completing first year nowMilestones left to pursue:
Integration of various component systems Simple to advanced query inference Integration with LINC if feasible
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ICITI Research
Interdepartmental research grant for equipment
Computer equipment to allow SoC to collaborate more fully and in sync with Libraries
Funds for separate, dedicated development and deployment machines and storage
Feedback from you
Exchanging our needs with yours
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Needs
Continued query logs Advanced, author, etc. query logs
Catalog data Book records and DB
What would Libraries like to see?
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Any questions?
References:
Mirror system: http://linc.comp.nus.edu.sg
Group documentation:
http://www-appn.comp.nus.edu.sg/~rpnlpir/twiki/bin/view.cgi/Query/WebHome