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We are providing statistics of Japanese Institutional Repositories DataBase. more News of the IRDB contents analysis system reopening (2011/4/1)

[2012/01/31  Number of Organizations 197, Number of records ALL: 1,261,052, Full text 939,673]

Content growth

Fiscal year 2011 Fiscal year 2010 Fiscal year 2009 Fiscal year 2008 Fiscal year 2007 ALL	Select Fiscal year	Full text ALL	Select ALL or Full text

Number of contents of latest month [2012/1] (Full text)

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Past number of contents (Full text)

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Breakdown of content by resource type (ratio)

Journal Article 145,033 (15.4%) Thesis or Dissertation 35,616 (3.8%) Departmental Bulletin Paper 478,849 (51.0%) Conference Paper 14,209 (1.5%) Presentation 3,538 (0.4%) Book 9,833 (1.0%) Technical Report 7,135 (0.8%) Research Paper 19,927 (2.1%) Article 39,215 (4.2%) Preprint 317 (0.0%) Learning Material 2,536 (0.3%) Data or Dataset 52,403 (5.6%) Software 19 (0.0%) Others 131,043 (13.9%) SUM 939,673

Detailed figure is displayed in another window by clicking.

Analysis of content

Ratio of full text

ALL

74.5 ％

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Version distribution

Input%

72.6 ％

Full text

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Language distribution

Input%

92.8 ％

Full text

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NDC distribution

Input%

31.5 ％

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Fileformat distribution

Input%

65.3 ％

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