…Make that 45 DSpace Repos in top 100 of IR Ranking of World Repositories

Wed, 2010-02-10 15:40 -- Anonymous (not verified)

Information for this blog post was contributed by Bram Luyten, @mire (http://atmire.com/)

Ithaca, NY  Though some DSpace repositories have seen their rankings toggle higher or lower since January of 2009, 45 landed in good positions as calculated in the January 2010 edition of the Ranking Web of World Repositories: Top 400 Institutional Repositories. What causes the rankings to change? Bram Luyten suggests that while the methods used by Ranking publisher, Consejo Superior de Investigaciones Cientficas (CSIC), have varied over the past year making 2009-2010 comparisons in practices challenging, factors such as changes in repository URLs without proper backwards compatibility may account for downward trends. Recruiting more content, gathering more incoming links or other changes could account for upward trends. Luyten believes that best practices could be adopted from those repositories that keep rising, in spite of variations in methodologies.

The overall aim of the Ranking Web of World Repositories is to support Open Access initiatives and therefore free access to scientific publications in an electronic form, as well as to other academic material. The web indicators are used here to measure the global visibility and impact of the scientific repositories. Read a full description of the methodology.

For the first time the January 2010 edition counts spreadsheets (.xls) documents as full texts which caused a big change in the rankings.

Thanks to some fine work of Claudia Jürgen in the past, identifying repository platforms for the listed ones, and the work I did on the July 2009 ranking, we compared the January 2010 ranking to January 2009 version.

DSpace was able to stand it’s ground, with 45 repositories listed in the top 100, compared to 43 spots in the January 2009 ranking. We’re very proud to see @mire clients, and their repository projects, listed here. Click them for more information on the project.

Here are DSpace repositories for which the rank improved:

+80    EU    Universitat Dortmund Eldorado Institutionellen Repositorium

+48    NA    SUNY Dspace

+45    NA    Cornell University eCommons

+44    AU    Australian National University Dspace

+37    NA    AMNH Scientific Publications

+36    NA    Oregon State University Scholarsarchive

+33    EU    University of Edinburgh Research Archive

+32    AS    Waseda University Dspace

+27    AU    University of Adelaide Digital Library

+23    NA    University of Toronto T Space

+21    AS    Hokkaido University Collection of Scholarly and Academic Papers

+19    EU    INIST I-Revues

+18    AS    Nagasaki University Academic Output

+13    NA    University of Michigan Deep Blue

+13    EU    Leiden University Digital Repository

+13    IBC    Biblioteca Digital Jurídica do Superior Tribunal de Justica

+12    NA    Rice University Scholarship

+11    EU    Digital CSIC

+10    IBC    Universidad de los Andes Repositorio Institucional

+9    NA    Caltech Authors

+9    EU    Katholieke Universiteit Leuven Lirias Repository

+6    EU    Diposit de la Recerca de Catalunya

+3    NA    Jet Propulsion Laboratory Beacon Espace

+1    NA    Ohio State University Knowledge Bank

We found only one DSpace repository, exactly on the same spot as last time, The University of Oregon Scholar’s Bank stays 29th in rank.

Unfortunately, there were some Instances who dropped in the ranking:

-59    NA    Boston University Digital Research Archive

-43    EU    Malmo University Electronic Publishing

-41    AS    Indian Statistical Institute Digital Library

-24    EU    Research in Atmosphere, Cryosphere, Hydrosphere and Solid Earth Fields

-24    NA    University of Calgary Dspace

-23    EU    National Library of Finland Dspace Services

-20    EU    Universitat Politécnica de Catalunya Upcommons

-18    AS    Nagoya University Repository

-16    EU    Cambridge University Dspace

-14    EU    Tartu University Library Dspace

-12    AS    Kyushu University Institutional Repository

-11    EU    University of Bergen Open Research Archive

-9    EU    Goteborg University Open Archive

-9    NA    University of New México Institutional Repository

-8    EU    Igitur Archive Universiteit Utrecht

-7    AS    Kyoto University Research Information Repository

-4    AS    University of Tokyo Repository

-4    NA    University of Wisconsin Digital Repository

-3    NA    Georgia Tech’s Institutional Repository

-2    EU    Universidade do Minho Repositorium

-1    NA    MIT Dspace

-1    EU    University of Helsinki Ethesis

We were able to identify these institutions who weren’t in the top 100 before, but are now. For most of them, we only have the position of January 2009, and not the one from July 2009. (position - institution name - positions won):

53 National Taiwan University Repository - New entrance in the ranking

59 Kanazawa University for Academic Resources - 112 since Jan 2009

63 Ochanomizu University Web Library Institutional Repository - 102 since Jan 2009

74 University of Sydney E-Scholarship - 45 since Jan 2009

77 University of British Columbia CIRCLE - New entrance in the ranking

79 Simon Fraser University Institutional Repository - 37 since Jan 2009

80 National Tsing Hua University Repository - 180 since Jan 2009

86 Rochester Institute of Technology Digital Media Library - 28 since Jan 2009

91 University of Kansas Scholarworks - 46 since Jan 2009

96 Université de Montreal Depot Institutionnel Numerique - 74 since Jan 2009

It would be great to hear from the top climbers, if they made certain customizations or improved their repository in a certain way, to explain the improvement in rank. At this point it’s very hard to identify whether the change in the algorithm is fully responsible for the changes, or whether best practices at institutions could explain the changes.

One mystery about the January 2010 ranking is the disappearance of the AgEcon Search repository. Ranked 6th in July 2009, the repository was removed from the list. Because it’s still in the non-institutional list, it might be that the CSIC authors didn’t consider AgEcon search to be an “institutional” repository.

To make a further analysis for your institution, it could be useful to compare the 4 different metrics between July & January:

Size (S). Number of pages recovered from the four largest engines: Google, Yahoo, Live Search and Exalead.

Visibility (V). The total number of unique external links received (inlinks) by a site can be only confidently obtained from Yahoo Search and Exalead.

Rich Files (R). Only the number of text files in Acrobat format (.pdf) and .xls files extracted from Google and Yahoo are considered.

Scholar (Sc). Using Google Scholar database we calculate the mean of the normalised total number of papers and those (recent papers) published between 2001 and 2008.

To conclude, the following are all DSpace instances that are represented in the Top 100.

(Current Ranking - Difference between Jan 2009 and July 2009 - Difference between July 2009 and Jan 2010)

06    -03    -01    NA    MIT Dspace

07    -13    +13    NA    University of Michigan Deep Blue

11    +10    -08    EU    Igitur Archive Universiteit Utrecht

16    -37    +36    NA    Oregon State University Scholarsarchive

17    +17    +19    EU    INIST I-Revues

18    +11    -02    EU    Universidade do Minho Repositorium

23    -13    +23    NA    University of Toronto T Space

24    +12    -20    EU    Universitat Politécnica de Catalunya Upcommons

25    +17    -07    AS    Kyoto University Research Information Repository

26    +04    +01    NA    Ohio State University Knowledge Bank

28    +00    -03    NA    Georgia Tech’s Institutional Repository

29    -24    +00    NA    University of Oregon Scholars’ Bank

32    -16    +10    IBC    Universidad de los Andes Repositorio Institucional

33    +02    -23    EU    National Library of Finland Dspace Services

34    -15    +13    EU    Leiden University Digital Repository

35    -05    -09    EU    Goteborg University Open Archive

36    +30    +13    IBC    Biblioteca Digital Jurídica do Superior Tribunal de Justica

38    +02    +45    NA    Cornell University eCommons

43    +09    +11    EU    Digital CSIC

44    +02    -12    AS    Kyushu University Institutional Repository

45    -06    -01    EU    University of Helsinki Ethesis

48    -16    +09    NA    Caltech Authors

52    -47    +44    AU    Australian National University Dspace

53     National Taiwan University Repository

54    -6    +32    AS    Waseda University Dspace

55    -18    +3    NA    Jet Propulsion Laboratory Beacon Espace

59     AS    Kanazawa University Repository for Academic Resources

60    +39    -4    AS    University of Tokyo Repository

63     AS    Ochanomizu University Web Library Institutional Repository

64    +40    +18    AS    Nagasaki University Academic Output

68    -37    +27    AU    University of Adelaide Digital Library

70    -50    +48    NA    SUNY Dspace

73    +49    -18    AS    Nagoya University Repository

74     -74    AU    University of Sydney E-Scholarship

77     CA    University of British Columbia CIRCLE

78    -19    -11    EU    University of Bergen Open Research Archive

79     -79    NA    Simon Fraser University Institutional Repository

80     AS    National Tsing Hua University Repository

85    -27    +06    EU    Diposit de la Recerca de Catalunya

86     -86    NA    Rochester Institute of Technology Digital Media Library

87    +41    +12    NA    Rice University Scholarship

91     -91    NA    University of Kansas Scholarworks

93    -10    -14    EU    Tartu University Library Dspace

96     NA    Université de Montreal Depot Institutionnel Numerique

99    -11    +21    AS    Hokkaido University Collection of Scholarly and Academic Papers

If you think we made a mistake, or if you want to discuss this ranking, please contact Bram Luyten, this could be interesting.

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