Search (5 results, page 1 of 1)

  • × author_ss:"Persson, O."
  • × theme_ss:"Informetrie"
  1. Järvelin, K.; Persson, O.: ¬The DCI-index : discounted cumulated impact-based research evaluation (2008) 0.02 
    0.022379503 = product of:
  0.06713851 = sum of:
    0.006905202 = weight(_text_:e in 2332) [ClassicSimilarity], result of:
      0.006905202 = score(doc=2332,freq=2.0), product of:
        0.05435166 = queryWeight, product of:
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.037813272 = queryNorm
        0.12704675 = fieldWeight in 2332, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.0625 = fieldNorm(doc=2332)
    0.060233302 = weight(_text_:k in 2332) [ClassicSimilarity], result of:
      0.060233302 = score(doc=2332,freq=4.0), product of:
        0.13498498 = queryWeight, product of:
          3.569778 = idf(docFreq=3384, maxDocs=44218)
          0.037813272 = queryNorm
        0.44622225 = fieldWeight in 2332, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.569778 = idf(docFreq=3384, maxDocs=44218)
          0.0625 = fieldNorm(doc=2332)
  0.33333334 = coord(2/6)
    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.
    Language
    e
  2. Järvelin, K.; Persson, O.: ¬The DCI index : discounted cumulated impact-based research evaluation (2008) 0.01 
    0.01398719 = product of:
  0.04196157 = sum of:
    0.004315751 = weight(_text_:e in 2694) [ClassicSimilarity], result of:
      0.004315751 = score(doc=2694,freq=2.0), product of:
        0.05435166 = queryWeight, product of:
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.037813272 = queryNorm
        0.07940422 = fieldWeight in 2694, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2694)
    0.037645817 = weight(_text_:k in 2694) [ClassicSimilarity], result of:
      0.037645817 = score(doc=2694,freq=4.0), product of:
        0.13498498 = queryWeight, product of:
          3.569778 = idf(docFreq=3384, maxDocs=44218)
          0.037813272 = queryNorm
        0.2788889 = fieldWeight in 2694, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.569778 = idf(docFreq=3384, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2694)
  0.33333334 = coord(2/6)
    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.
    Language
    e
  3. Persson, O.; Beckmann, M.: Locating the network of interacting authors in scientific specialities (1995) 0.01 
    0.0061606965 = product of:
  0.018482089 = sum of:
    0.011576886 = product of:
      0.069461316 = sum of:
        0.069461316 = weight(_text_:authors in 3300) [ClassicSimilarity], result of:
          0.069461316 = score(doc=3300,freq=2.0), product of:
            0.17238368 = queryWeight, product of:
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.037813272 = queryNorm
            0.40294603 = fieldWeight in 3300, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.0625 = fieldNorm(doc=3300)
      0.16666667 = coord(1/6)
    0.006905202 = weight(_text_:e in 3300) [ClassicSimilarity], result of:
      0.006905202 = score(doc=3300,freq=2.0), product of:
        0.05435166 = queryWeight, product of:
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.037813272 = queryNorm
        0.12704675 = fieldWeight in 3300, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.0625 = fieldNorm(doc=3300)
  0.33333334 = coord(2/6)
    Language
    e
  4. Persson, O.; Melin, G.: Equalization, growth and integration of science (1996) 0.00 
    0.0014385837 = product of:
  0.008631502 = sum of:
    0.008631502 = weight(_text_:e in 6698) [ClassicSimilarity], result of:
      0.008631502 = score(doc=6698,freq=2.0), product of:
        0.05435166 = queryWeight, product of:
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.037813272 = queryNorm
        0.15880844 = fieldWeight in 6698, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.078125 = fieldNorm(doc=6698)
  0.16666667 = coord(1/6)
    Language
    e
  5. Melin, G.; Persson, O.: Hotel cosmopolitan : a bibliometric study of collaboration at some European universities (1998) 0.00 
    8.631502E-4 = product of:
  0.0051789014 = sum of:
    0.0051789014 = weight(_text_:e in 329) [ClassicSimilarity], result of:
      0.0051789014 = score(doc=329,freq=2.0), product of:
        0.05435166 = queryWeight, product of:
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.037813272 = queryNorm
        0.09528506 = fieldWeight in 329, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.43737 = idf(docFreq=28552, maxDocs=44218)
          0.046875 = fieldNorm(doc=329)
  0.16666667 = coord(1/6)
    Language
    e

Authors

Years