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ECDL, Budapest, Hungary, Sep 16 – 21, 2007 A Study of Citations in Users’ Online Personal Collections Nishikant Kapoor John T Butler, Sean M McNee, Gary.

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Presentation on theme: "ECDL, Budapest, Hungary, Sep 16 – 21, 2007 A Study of Citations in Users’ Online Personal Collections Nishikant Kapoor John T Butler, Sean M McNee, Gary."— Presentation transcript:

1 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 A Study of Citations in Users’ Online Personal Collections Nishikant Kapoor John T Butler, Sean M McNee, Gary C Fouty James A Stemper, Joseph A Konstan GroupLens Research Group and University Libraries University of Minnesota, USA

2 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Recommenders Systems

3 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Recommenders Systems

4 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Recommenders Systems

5 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Recommenders Systems

6 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Recommenders Systems

7 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Recommenders Systems

8 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Recommenders Systems

9 ECDL, Budapest, Hungary, Sep 16 – 21, 2007

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13 Research Objectives u Design & Develop è Personalized digital library services u Understand è Users’ research interests

14 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Research Questions Can we utilize users’ personal citation collections to offer them personalized DL services? è Can citations in users’ personal collections be resolved to unique identifiers? è How many of those do actually resolve to a unique online identifier? è How many of the resolved citations do actually lead to an online source for their content or metadata?

15 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 RefWorks

16 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Citation Collections u RefWorks users è 96 collections, 30,336 citations è Two outliers (4000+ and 7000+) 316

17 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Citation Types

18 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Citation Types B D S N J R

19 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Citation Types Undergraduate U=15 C=725 Graduate U=64 C=11,751 Researcher U=6 C=1,941 Faculty U=8 C=3,626 D B J RN W

20 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Resolvability u A citation is resolvable if it has è A valid unique ID : DOI for articles, ISBN for books è Enough information to resolve it to a unique ID All citations that can be represented using a valid unique ID, are potentially resolvable. Unique ID of identical citations in different collections is key to building similarities between users.

21 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 External Resolvers u DOI and OpenURL Query Interfaces è Citation resolvers at crossref.org (CR) u ISBN Query Interfaces è Citation resolver at worldcat.org (WC)

22 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Validity u A URL is valid if it leads to a citation’s source online è URLs : URL may or may not be unique è Validated existence of URL, not its accuracy è Did not attempt to retrieve ID for citation

23 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 DOI Resolvability CitationsResolvedRW onlyBothCR only Science/Technology4,0272,637 (65%)101002,527 Natural Resources1,346754 (56%)476674 Business518283 (55%)283 Public Health1,229562 (46%)258502 Medicine2,3261,033 (44%)2109922 Other1,158487 (42%)1281394 Social Sciences3,0151,216 (40%)1591,156 Humanities18973 (39%)21457 Public Affairs552158 (29%)158 Faculty2,6941,718 (64%)1391,678 Researcher1,584798 (50%)1492692 Graduate10,1704,716 (46%)183884,310 Undergraduate562234 (42%)11223 Totals15,0107,466 (50%)335306,903 0 0

24 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 ISBN Resolvability CitationsResolvedRW onlyBothWC only Other9883 (85%)234218 Business9781 (84%)133830 Public Affairs258215 (83%)2412170 Social Sciences414301 (73%)7017358 Science/Technology236164 (69%)238457 Humanities7853 (68%)10376 Medicine1610 (63%)46 Natural Resources5122 (43%)589 Public Health367 (19%)16 Graduate916713 (78%)144419150 Faculty180126 (70%)113184 Undergraduate5336 (68%)91116 Researcher183102 (56%)196815 Totals1,332977 (73%)183529265

25 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 URL Validity CitationsValid Humanities1313 (100%) Public Health88 (100%) Medicine22 (100%) Social Sciences178175 (98%) Natural Resources7169 (97%) Business174160 (92%) Public Affairs9577 (81%) Other107 (70%) Science/Technology6231 (50%) Graduate441417 (95%) Faculty10589 (85%) Researcher6334 (54%) Undergraduate42 (50%) Totals613542 (88%)

26 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Resolvability Overlap

27 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Resolvability Summary Number of resolved citations BeforeAfterGain DOI563 (4%)7,466 (50%)6,383 (43%) ISBN712 (53%)977 (73%)265 (20%) URL542 (88%) N/A Totals2,337 (13%)8,540 (47%)6,203 (34%) 8,540 (47%)

28 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 u Very limited resolvers were used è Additional resolvers such as the Citation Matcher from PubMed could enhance resolvability further u Dataset too small and too diverse è Difficult to find correlation among users è CF based services work better with larger dataset u Privacy concerns è Users want (a) control (b) anonymity Limitations & Concerns

29 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Future Work u Survey - Users’ willingness to share their personal collections u Understand how truly do users’ personal collections represent their profile? u Prototype of CF based DL services http://techlens.cs.umn.edu/ RecSys, Minneapolis, Oct 19-20, 2007

30 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Resources u GroupLens Research Group, Dept of CSEE University of Minnesota, USA http://www.grouplens.org/ u MovieLens Recommender System http://www.movielens.org/ u TechLens Recommender System http://techlens.cs.umn.edu/

31 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 Acknowledgements u NSF grant IIS-0534939 u RefWorks (http://www.refworks.com/)http://www.refworks.com/

32 ECDL, Budapest, Hungary, Sep 16 – 21, 2007 A Study of Citations in Users’ Online Personal Collections Nishikant Kapoor Questions?

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