Search (4 results, page 1 of 1)

  • × theme_ss:"Informetrie"
  • × year_i:[1980 TO 1990}
  1. Nicholls, P.T.: Empirical validation of Lotka's law (1986) 0.03 
    0.02807389 = product of:
  0.05614778 = sum of:
    0.05614778 = product of:
      0.11229556 = sum of:
        0.11229556 = weight(_text_:22 in 5509) [ClassicSimilarity], result of:
          0.11229556 = score(doc=5509,freq=2.0), product of:
            0.1814022 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05180212 = queryNorm
            0.61904186 = fieldWeight in 5509, 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=5509)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Information processing and management. 22(1986), S.417-419
  2. Fiala, J.: Information flood : fiction and reality (1987) 0.03 
    0.02807389 = product of:
  0.05614778 = sum of:
    0.05614778 = product of:
      0.11229556 = sum of:
        0.11229556 = weight(_text_:22 in 1080) [ClassicSimilarity], result of:
          0.11229556 = score(doc=1080,freq=2.0), product of:
            0.1814022 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05180212 = queryNorm
            0.61904186 = fieldWeight in 1080, 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=1080)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Thermochimica acta. 110(1987), S.11-22
  3. Stock, W.G.: ¬Die Wichtigkeit wissenschaftlicher Dokumente relativ zu gegebenen Thematiken (1981) 0.02 
    0.018619968 = product of:
  0.037239935 = sum of:
    0.037239935 = product of:
      0.07447987 = sum of:
        0.07447987 = weight(_text_:n in 13) [ClassicSimilarity], result of:
          0.07447987 = score(doc=13,freq=2.0), product of:
            0.22335295 = queryWeight, product of:
              4.3116565 = idf(docFreq=1611, maxDocs=44218)
              0.05180212 = queryNorm
            0.33346266 = fieldWeight in 13, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.3116565 = idf(docFreq=1611, maxDocs=44218)
              0.0546875 = fieldNorm(doc=13)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Scientific documents are more or less important in relation to give subjects and this importance can be measured. An empirical investigation into philosophical information was carried out using a weighting algorithm developed by N. Henrichs which results in a distribution by weighting of documents on an average philosophical subject. With the aid of statistical methods a threshold value can be obtained that separates the important and unimportant documents on a subject. The knowledge of theis threshold value is important for various practical and theoretic questions: providing new possibilities for research strategy in information retrieval; evaluation of the 'titleworthiness' of subjects by comparison of document titles and themes for which the document at hand is important; and making available data on thematic trends for scientific results
  4. Tsay, M.-Y.: ¬A bibliometric study of indexing and abstracting, 1876-1976 (1989) 0.02 
    0.018027065 = product of:
  0.03605413 = sum of:
    0.03605413 = product of:
      0.14421652 = sum of:
        0.14421652 = weight(_text_:authors in 5060) [ClassicSimilarity], result of:
          0.14421652 = score(doc=5060,freq=6.0), product of:
            0.23615624 = queryWeight, product of:
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.05180212 = queryNorm
            0.61068267 = fieldWeight in 5060, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.0546875 = fieldNorm(doc=5060)
      0.25 = coord(1/4)
  0.5 = coord(1/2)
    Abstract
    In a bibliometric study of references to indexing and abstracting from 1876 to 1976 a total of 2.381 references in Wellisch's Indexing and abstracting: an international bibliography were analysed by a PL/I program. Most of the articles (67%) appeared as journal papers. The Bradford-Zipf law was applied to investigate the journal literature. Thirteen core journals were identified, six of which emphasize the subject of indexing and abstracting. Lotka's law was used to measure the productivity of authors. The vast majority, 1.533 out of 1.966 authors, contributed only one article. The leading authors and their active life in this subject were also studied. English is the predominant language of articles on indexing and abstracting

Authors

Languages