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Järvelin, K.; Persson, O.: ¬The DCI-index : discounted cumulated impact-based research evaluation (2008)
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- Abstract
- The article by K. Järvelin & O. Persson published in JASIST 59(9), The DCI-Index: Discounted Cumulated Impact-Based Research Evaluation, (pp. 1433-1440) contains an unfortunate error in one of its formulas, Equation 3. The present paper gives the correction and an example of impact analysis based on the corrected formula.
- Source
- Journal of the American Society for Information Science and Technology. 59(2008) no.14, S.2350-2352
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Järvelin, K.; Persson, O.: ¬The DCI index : discounted cumulated impact-based research evaluation (2008)
0.02
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- Content
- Erratum in: Järvelin, K., O. Persson: The DCI-index: discounted cumulated impact-based research evaluation. Erratum re. In: Journal of the American Society for Information Science and Technology. 59(2008) no.14, S.2350-2352.
- Source
- Journal of the American Society for Information Science and Technology. 59(2008) no.9, S.1433-1440
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Persson, O.; Melin, G.: Equalization, growth and integration of science (1996)
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- Source
- Scientometrics. 37(1996) no.1, S.153-157
-
Persson, O.; Beckmann, M.: Locating the network of interacting authors in scientific specialities (1995)
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- Source
- Scientometrics. 33(1995) no.3, S.351-366
-
Melin, G.; Persson, O.: Hotel cosmopolitan : a bibliometric study of collaboration at some European universities (1998)
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- Source
- Journal of the American Society for Information Science. 49(1998) no.1, S.43-48
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Leydesdorff, L.; Persson, O.: Mapping the geography of science : distribution patterns and networks of relations among cities and institutes (2010)
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- Source
- Journal of the American Society for Information Science and Technology. 61(2010) no.8, S.1622-1634