Search (52 results, page 1 of 3)

  • × theme_ss:"Informetrie"
  • × year_i:[2000 TO 2010}
  1. Rostaing, H.; Barts, N.; Léveillé, V.: Bibliometrics: representation instrument of the multidisciplinary positioning of a scientific area : Implementation for an Advisory Scientific Committee (2007) 0.09
    0.08957453 = product of:
      0.17914906 = sum of:
        0.17914906 = sum of:
          0.13034582 = weight(_text_:y in 1144) [ClassicSimilarity], result of:
            0.13034582 = score(doc=1144,freq=4.0), product of:
              0.21668325 = queryWeight, product of:
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.045026023 = queryNorm
              0.60155004 = fieldWeight in 1144, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.0625 = fieldNorm(doc=1144)
          0.048803236 = weight(_text_:22 in 1144) [ClassicSimilarity], result of:
            0.048803236 = score(doc=1144,freq=2.0), product of:
              0.15767346 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045026023 = queryNorm
              0.30952093 = fieldWeight in 1144, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0625 = fieldNorm(doc=1144)
      0.5 = coord(1/2)
    
    Date
    30.12.2007 11:22:39
    Source
    ¬La interdisciplinariedad y la transdisciplinariedad en la organización del conocimiento científico : actas del VIII Congreso ISKO-España, León, 18, 19 y 20 de Abril de 2007 : Interdisciplinarity and transdisciplinarity in the organization of scientific knowledge. Ed.: B. Rodriguez Bravo u. M.L Alvite Diez
  2. Larivière, V.; Gingras, Y.; Archambault, E.: ¬The decline in the concentration of citations, 1900-2007 (2009) 0.06
    0.06044498 = product of:
      0.12088996 = sum of:
        0.12088996 = sum of:
          0.06912631 = weight(_text_:y in 2763) [ClassicSimilarity], result of:
            0.06912631 = score(doc=2763,freq=2.0), product of:
              0.21668325 = queryWeight, product of:
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.045026023 = queryNorm
              0.3190201 = fieldWeight in 2763, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.046875 = fieldNorm(doc=2763)
          0.051763654 = weight(_text_:22 in 2763) [ClassicSimilarity], result of:
            0.051763654 = score(doc=2763,freq=4.0), product of:
              0.15767346 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045026023 = queryNorm
              0.32829654 = fieldWeight in 2763, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=2763)
      0.5 = coord(1/2)
    
    Date
    22. 3.2009 19:22:35
  3. Shibata, N.; Kajikawa, Y.; Takeda, Y.; Matsushima, K.: Comparative study on methods of detecting research fronts using different types of citation (2009) 0.06
    0.05598408 = product of:
      0.11196816 = sum of:
        0.11196816 = sum of:
          0.08146614 = weight(_text_:y in 2743) [ClassicSimilarity], result of:
            0.08146614 = score(doc=2743,freq=4.0), product of:
              0.21668325 = queryWeight, product of:
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.045026023 = queryNorm
              0.37596878 = fieldWeight in 2743, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.0390625 = fieldNorm(doc=2743)
          0.030502023 = weight(_text_:22 in 2743) [ClassicSimilarity], result of:
            0.030502023 = score(doc=2743,freq=2.0), product of:
              0.15767346 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045026023 = queryNorm
              0.19345059 = fieldWeight in 2743, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0390625 = fieldNorm(doc=2743)
      0.5 = coord(1/2)
    
    Date
    22. 3.2009 17:52:50
  4. Asonuma, A.; Fang, Y.; Rousseau, R.: Reflections on the age distribution of Japanese scientists (2006) 0.05
    0.052864365 = product of:
      0.10572873 = sum of:
        0.10572873 = sum of:
          0.06912631 = weight(_text_:y in 5270) [ClassicSimilarity], result of:
            0.06912631 = score(doc=5270,freq=2.0), product of:
              0.21668325 = queryWeight, product of:
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.045026023 = queryNorm
              0.3190201 = fieldWeight in 5270, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.046875 = fieldNorm(doc=5270)
          0.036602426 = weight(_text_:22 in 5270) [ClassicSimilarity], result of:
            0.036602426 = score(doc=5270,freq=2.0), product of:
              0.15767346 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045026023 = queryNorm
              0.23214069 = fieldWeight in 5270, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=5270)
      0.5 = coord(1/2)
    
    Date
    22. 7.2006 15:26:24
  5. Zhang, Y.; Jansen, B.J.; Spink, A.: Identification of factors predicting clickthrough in Web searching using neural network analysis (2009) 0.05
    0.052864365 = product of:
      0.10572873 = sum of:
        0.10572873 = sum of:
          0.06912631 = weight(_text_:y in 2742) [ClassicSimilarity], result of:
            0.06912631 = score(doc=2742,freq=2.0), product of:
              0.21668325 = queryWeight, product of:
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.045026023 = queryNorm
              0.3190201 = fieldWeight in 2742, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.046875 = fieldNorm(doc=2742)
          0.036602426 = weight(_text_:22 in 2742) [ClassicSimilarity], result of:
            0.036602426 = score(doc=2742,freq=2.0), product of:
              0.15767346 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045026023 = queryNorm
              0.23214069 = fieldWeight in 2742, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=2742)
      0.5 = coord(1/2)
    
    Date
    22. 3.2009 17:49:11
  6. Leydesdorff, L.; Sun, Y.: National and international dimensions of the Triple Helix in Japan : university-industry-government versus international coauthorship relations (2009) 0.05
    0.052864365 = product of:
      0.10572873 = sum of:
        0.10572873 = sum of:
          0.06912631 = weight(_text_:y in 2761) [ClassicSimilarity], result of:
            0.06912631 = score(doc=2761,freq=2.0), product of:
              0.21668325 = queryWeight, product of:
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.045026023 = queryNorm
              0.3190201 = fieldWeight in 2761, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.046875 = fieldNorm(doc=2761)
          0.036602426 = weight(_text_:22 in 2761) [ClassicSimilarity], result of:
            0.036602426 = score(doc=2761,freq=2.0), product of:
              0.15767346 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045026023 = queryNorm
              0.23214069 = fieldWeight in 2761, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=2761)
      0.5 = coord(1/2)
    
    Date
    22. 3.2009 19:07:20
  7. Tonta, Y.; Ünal, Y.: Scatter of journals and literature obsolescence reflected in document delivery requests (2005) 0.04
    0.044787265 = product of:
      0.08957453 = sum of:
        0.08957453 = sum of:
          0.06517291 = weight(_text_:y in 3271) [ClassicSimilarity], result of:
            0.06517291 = score(doc=3271,freq=4.0), product of:
              0.21668325 = queryWeight, product of:
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.045026023 = queryNorm
              0.30077502 = fieldWeight in 3271, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.03125 = fieldNorm(doc=3271)
          0.024401618 = weight(_text_:22 in 3271) [ClassicSimilarity], result of:
            0.024401618 = score(doc=3271,freq=2.0), product of:
              0.15767346 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045026023 = queryNorm
              0.15476047 = fieldWeight in 3271, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.03125 = fieldNorm(doc=3271)
      0.5 = coord(1/2)
    
    Date
    20. 3.2005 10:54:22
  8. Meho, L.I.; Rogers, Y.: Citation counting, citation ranking, and h-index of human-computer interaction researchers : a comparison of Scopus and Web of Science (2008) 0.04
    0.04405364 = product of:
      0.08810728 = sum of:
        0.08810728 = sum of:
          0.05760526 = weight(_text_:y in 2352) [ClassicSimilarity], result of:
            0.05760526 = score(doc=2352,freq=2.0), product of:
              0.21668325 = queryWeight, product of:
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.045026023 = queryNorm
              0.26585007 = fieldWeight in 2352, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.8124003 = idf(docFreq=976, maxDocs=44218)
                0.0390625 = fieldNorm(doc=2352)
          0.030502023 = weight(_text_:22 in 2352) [ClassicSimilarity], result of:
            0.030502023 = score(doc=2352,freq=2.0), product of:
              0.15767346 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045026023 = queryNorm
              0.19345059 = fieldWeight in 2352, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0390625 = fieldNorm(doc=2352)
      0.5 = coord(1/2)
    
    Abstract
    This study examines the differences between Scopus and Web of Science in the citation counting, citation ranking, and h-index of 22 top human-computer interaction (HCI) researchers from EQUATOR - a large British Interdisciplinary Research Collaboration project. Results indicate that Scopus provides significantly more coverage of HCI literature than Web of Science, primarily due to coverage of relevant ACM and IEEE peer-reviewed conference proceedings. No significant differences exist between the two databases if citations in journals only are compared. Although broader coverage of the literature does not significantly alter the relative citation ranking of individual researchers, Scopus helps distinguish between the researchers in a more nuanced fashion than Web of Science in both citation counting and h-index. Scopus also generates significantly different maps of citation networks of individual scholars than those generated by Web of Science. The study also presents a comparison of h-index scores based on Google Scholar with those based on the union of Scopus and Web of Science. The study concludes that Scopus can be used as a sole data source for citation-based research and evaluation in HCI, especially when citations in conference proceedings are sought, and that researchers should manually calculate h scores instead of relying on system calculations.
  9. He, Y.; Hui, S.C.: Mining a web database for author cocitation analysis (2002) 0.04
    0.04032368 = product of:
      0.08064736 = sum of:
        0.08064736 = product of:
          0.16129471 = sum of:
            0.16129471 = weight(_text_:y in 2584) [ClassicSimilarity], result of:
              0.16129471 = score(doc=2584,freq=2.0), product of:
                0.21668325 = queryWeight, product of:
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.045026023 = queryNorm
                0.7443802 = fieldWeight in 2584, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.109375 = fieldNorm(doc=2584)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  10. Ding, Y.; Chowdhury, G.C.; Foo, S.: Bibliometric cartography of information retrieval research by using co-word analysis (2001) 0.03
    0.034563154 = product of:
      0.06912631 = sum of:
        0.06912631 = product of:
          0.13825262 = sum of:
            0.13825262 = weight(_text_:y in 6487) [ClassicSimilarity], result of:
              0.13825262 = score(doc=6487,freq=2.0), product of:
                0.21668325 = queryWeight, product of:
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.045026023 = queryNorm
                0.6380402 = fieldWeight in 6487, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.09375 = fieldNorm(doc=6487)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  11. Nicolaisen, J.: Citation analysis (2007) 0.02
    0.024401618 = product of:
      0.048803236 = sum of:
        0.048803236 = product of:
          0.09760647 = sum of:
            0.09760647 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
              0.09760647 = score(doc=6091,freq=2.0), product of:
                0.15767346 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045026023 = queryNorm
                0.61904186 = fieldWeight in 6091, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.125 = fieldNorm(doc=6091)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    13. 7.2008 19:53:22
  12. Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001) 0.02
    0.021568187 = product of:
      0.043136373 = sum of:
        0.043136373 = product of:
          0.08627275 = sum of:
            0.08627275 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
              0.08627275 = score(doc=3925,freq=4.0), product of:
                0.15767346 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045026023 = queryNorm
                0.54716086 = fieldWeight in 3925, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.078125 = fieldNorm(doc=3925)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 7.2006 15:22:28
  13. Wagner-Döbler, R.: Kognitive Mobilität und Zipfs "Principle of Least Effort" (2004) 0.02
    0.020366535 = product of:
      0.04073307 = sum of:
        0.04073307 = product of:
          0.08146614 = sum of:
            0.08146614 = weight(_text_:y in 3159) [ClassicSimilarity], result of:
              0.08146614 = score(doc=3159,freq=4.0), product of:
                0.21668325 = queryWeight, product of:
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.045026023 = queryNorm
                0.37596878 = fieldWeight in 3159, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=3159)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Unter kognitiver Mobilität verstehe ich im folgenden nicht die Mobilität von Information, sondern die Bewegung des Denkens, und zwar hier des wissenschaftlichen Denkens. Wissenschaftliches Denken vollzieht sich disziplinär sowie interdisziplinär, im informationellen Austausch von Disziplinen und Forschungsgebieten. Dieser Austausch unterliegt, wie die Wissenschaftsgeschichte lehrt, einer Entwicklungsdynamik, die als Abfolge von Wanderungen oder Übergängen zwischen Forschungsgebieten in folgendem Sinn verständen werden kann. Beschäftigt sich ein Forscher A zum Zeitpunkt t1 mit Forschungsgebiet X und zum Zeitpunkt t2 als nächstes mit Forschungsgebiet Y, so liegt ein Übergang von X nach Y vor. Gibt es für diese Art von Übergängen charakteristische Eigenschaften oder Regularitäten.> Ein wichtiges Merkmal solcher Übergänge ist der Grad der Verwandtschaft, der kognitiven Affinität zwischen Ausgangs- und Zielgebiet der Migration. Am Beispiel der rund 150.000 Migrationen zwischen den mathematischen Subdisziplinen, wie sie sich in den Zeitschriftenartikel-Nachweisen der Mathematical Reviews von 1959 bis 1975 widerspiegeln, wurde das Verhältnis von kognitiver Mobilität und Affinität empirisch systematisch untersucht. Es bestätigte sich George K. Zipfs "Principle of Least Effort". Zählreiche Mechanismen und Faustregeln der Wissensorganisation dürften der Wirksamkeit dieses Prinzips zugrundeliegen.
  14. Cheng, S.; YunTao, P.; JunPeng, Y.; Hong, G.; ZhengLu, Y.; ZhiYu, H.: PageRank, HITS and impact factor for journal ranking (2009) 0.02
    0.020366535 = product of:
      0.04073307 = sum of:
        0.04073307 = product of:
          0.08146614 = sum of:
            0.08146614 = weight(_text_:y in 2513) [ClassicSimilarity], result of:
              0.08146614 = score(doc=2513,freq=4.0), product of:
                0.21668325 = queryWeight, product of:
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.045026023 = queryNorm
                0.37596878 = fieldWeight in 2513, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=2513)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  15. Park, H.W.; Barnett, G.A.; Nam, I.-Y.: Hyperlink - affiliation network structure of top Web sites : examining affiliates with hyperlink in Korea (2002) 0.02
    0.02016184 = product of:
      0.04032368 = sum of:
        0.04032368 = product of:
          0.08064736 = sum of:
            0.08064736 = weight(_text_:y in 584) [ClassicSimilarity], result of:
              0.08064736 = score(doc=584,freq=2.0), product of:
                0.21668325 = queryWeight, product of:
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.045026023 = queryNorm
                0.3721901 = fieldWeight in 584, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=584)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  16. Nah, I.W.; Kang, D.-S.; Lee, D.-H.; Chung, Y.-C.: ¬A bibliometric evaluation of research performance in different subject categories (2009) 0.02
    0.02016184 = product of:
      0.04032368 = sum of:
        0.04032368 = product of:
          0.08064736 = sum of:
            0.08064736 = weight(_text_:y in 2772) [ClassicSimilarity], result of:
              0.08064736 = score(doc=2772,freq=2.0), product of:
                0.21668325 = queryWeight, product of:
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.045026023 = queryNorm
                0.3721901 = fieldWeight in 2772, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=2772)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  17. Yan, E.; Ding, Y.: Applying centrality measures to impact analysis : a coauthorship network analysis (2009) 0.02
    0.02016184 = product of:
      0.04032368 = sum of:
        0.04032368 = product of:
          0.08064736 = sum of:
            0.08064736 = weight(_text_:y in 3083) [ClassicSimilarity], result of:
              0.08064736 = score(doc=3083,freq=2.0), product of:
                0.21668325 = queryWeight, product of:
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.045026023 = queryNorm
                0.3721901 = fieldWeight in 3083, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=3083)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  18. Lewison, G.: ¬The work of the Bibliometrics Research Group (City University) and associates (2005) 0.02
    0.018301213 = product of:
      0.036602426 = sum of:
        0.036602426 = product of:
          0.07320485 = sum of:
            0.07320485 = weight(_text_:22 in 4890) [ClassicSimilarity], result of:
              0.07320485 = score(doc=4890,freq=2.0), product of:
                0.15767346 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045026023 = queryNorm
                0.46428138 = fieldWeight in 4890, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.09375 = fieldNorm(doc=4890)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    20. 1.2007 17:02:22
  19. Egghe, L.: ¬A noninformetric analysis of the relationship between citation age and journal productivity (2001) 0.02
    0.017281577 = product of:
      0.034563154 = sum of:
        0.034563154 = product of:
          0.06912631 = sum of:
            0.06912631 = weight(_text_:y in 5685) [ClassicSimilarity], result of:
              0.06912631 = score(doc=5685,freq=2.0), product of:
                0.21668325 = queryWeight, product of:
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.045026023 = queryNorm
                0.3190201 = fieldWeight in 5685, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.046875 = fieldNorm(doc=5685)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    A problem, raised by Wallace (JASIS, 37,136-145,1986), on the relation between the journal's median citation age and its number of articles is studied. Leaving open the problem as such, we give a statistical explanation of this relationship, when replacing "median" by "mean" in Wallace's problem. The cloud of points, found by Wallace, is explained in this sense that the points are scattered over the area in first quadrant, limited by a curve of the form y=1 + E/x**2 where E is a constant. This curve is obtained by using the Central Limit Theorem in statistics and, hence, has no intrinsic informetric foundation. The article closes with some reflections on explanations of regularities in informetrics, based on statistical, probabilistic or informetric results, or on a combination thereof
  20. Tsay, M.-y.: Literature growth, journal characteristics, and suthor productivity in subject indexing, 1977 to 2000 (2004) 0.02
    0.017281577 = product of:
      0.034563154 = sum of:
        0.034563154 = product of:
          0.06912631 = sum of:
            0.06912631 = weight(_text_:y in 2070) [ClassicSimilarity], result of:
              0.06912631 = score(doc=2070,freq=2.0), product of:
                0.21668325 = queryWeight, product of:
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.045026023 = queryNorm
                0.3190201 = fieldWeight in 2070, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.8124003 = idf(docFreq=976, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2070)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    

Languages

  • e 46
  • d 6

Types

  • a 52
  • el 1
  • More… Less…