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 transcript:

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

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

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

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

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

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

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

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

ECDL, Budapest,Hungary, Sep 16 – 21, 2007 Motivation Citation web data can be used to effectively generate recommendations for the technical paper “On the Recommending of Citations for Research Papers”, McNee, et al. (CSCW 2002) “Enhancing Digital Libraries with TechLens+”, Torres, et al. (JCDL 2004)

ECDL, Budapest,Hungary, Sep 16 – 21, 2007 Research Objectives u Design & Develop è Personalized digital library services u Understand è Users’ research interests

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?

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

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

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

ECDL, Budapest,Hungary, Sep 16 – 21, 2007 User Profile u Users’ personal citation collections è Represent users’ profile è Research interests, Research collaborations è Are single collections è Related, Diverse è Are multiple collections è Task based, Workgroup based

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

ECDL, Budapest,Hungary, Sep 16 – 21, 2007 Citation Types Undergraduate U=15 C=725 Graduate U=64 C=11,751 Researcher U=6 C=1941 Faculty U=8 C=3626 D B J RN W

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.

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)

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

ECDL, Budapest,Hungary, Sep 16 – 21, 2007 DOI Resolvability CitationsResolvedRW onlyBothCR only Science/Technology4,0272,637 (65%)101002,527 Natural Resources1, (56%) Business (55%)283 Public Health1, (46%) Medicine2,3261,033 (44%) Other1, (42%) Social Sciences3,0151,216 (40%)1591,156 Humanities18973 (39%)21457 Public Affairs (29%)158 Faculty2,6941,718 (64%)1391,678 Researcher1, (50%) Graduate10,1704,716 (46%)183884,310 Undergraduate (42%)11223 Totals15,0107,466 (50%)335306,

ECDL, Budapest,Hungary, Sep 16 – 21, 2007 ISBN Resolvability CitationsResolvedRW onlyBothWC only Other9883 (85%) Business9781 (84%) Public Affairs (83%) Social Sciences (73%) Science/Technology (69%) Humanities7853 (68%)10376 Medicine1610 (63%)46 Natural Resources5122 (43%)589 Public Health367 (19%)16 Graduate (78%) Faculty (70%) Undergraduate5336 (68%)91116 Researcher (56%) Totals1, (73%)

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

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

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%)

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 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

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 RecSys, Minneapolis, Oct 19-20, 2007

ECDL, Budapest,Hungary, Sep 16 – 21, 2007 Acknowledgements u NSF grant IIS u RefWorks (

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