Document (#17836)

Author
Alvarado, R.U.
Title
¬Una revision critica de la ley de Bradford
Source
Investigaçion Bibliotecologica: Archivonomia; Bibliotecologia e Informaçion. 10(1996) no.20, S.16-26
Year
1996
Abstract
Bradford's law is widely used in collection development to identify the most productive periodicals, but does nott take into account the variables of frequency of publication and number of years of publication during a particular time span. Hence not all periodicals necessarily have the same opportunity to publish relevant articles. To test this hypothesis, the productivity of American sociology periodicals during 1987-91 was analysed and shown to correlate with frequency of publication and number of years of publication, giving a more accurate representation than using Bradford's law as originally formulated
Footnote
Übers. des Titels: A critical revision of Bradford's law
Theme
Informetrie
Object
Bradford-Gesetz

Similar documents (content)

  1. Heine, M.M.: Bradford ranking conventions and their application to a growing literature (1998) 0.14
    0.13688925 = sum of:
      0.13688925 = product of:
        0.8555578 = sum of:
          0.075719774 = weight(abstract_txt:productivity in 1069) [ClassicSimilarity], result of:
            0.075719774 = score(doc=1069,freq=1.0), product of:
              0.14191873 = queryWeight, product of:
                1.0787314 = boost
                6.829353 = idf(docFreq=129, maxDocs=44218)
                0.019264018 = queryNorm
              0.53354317 = fieldWeight in 1069, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.829353 = idf(docFreq=129, maxDocs=44218)
                0.078125 = fieldNorm(doc=1069)
          0.080172844 = weight(abstract_txt:originally in 1069) [ClassicSimilarity], result of:
            0.080172844 = score(doc=1069,freq=1.0), product of:
              0.14742972 = queryWeight, product of:
                1.0994766 = boost
                6.9606886 = idf(docFreq=113, maxDocs=44218)
                0.019264018 = queryNorm
              0.5438038 = fieldWeight in 1069, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.9606886 = idf(docFreq=113, maxDocs=44218)
                0.078125 = fieldNorm(doc=1069)
          0.3808864 = weight(abstract_txt:bradford in 1069) [ClassicSimilarity], result of:
            0.3808864 = score(doc=1069,freq=9.0), product of:
              0.20030096 = queryWeight, product of:
                1.2815483 = boost
                8.113368 = idf(docFreq=35, maxDocs=44218)
                0.019264018 = queryNorm
              1.9015706 = fieldWeight in 1069, product of:
                3.0 = tf(freq=9.0), with freq of:
                  9.0 = termFreq=9.0
                8.113368 = idf(docFreq=35, maxDocs=44218)
                0.078125 = fieldNorm(doc=1069)
          0.31877875 = weight(abstract_txt:bradford's in 1069) [ClassicSimilarity], result of:
            0.31877875 = score(doc=1069,freq=1.0), product of:
              0.4661973 = queryWeight, product of:
                2.7649884 = boost
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.019264018 = queryNorm
              0.683785 = fieldWeight in 1069, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.078125 = fieldNorm(doc=1069)
        0.16 = coord(4/25)
    
  2. Schloegl, C.; Stock, W.G.: Impact and relevance of LIS journals : a scientometric analysis of international and German-language LIS journals - Citation analysis versus reader survey (2004) 0.12
    0.11868405 = sum of:
      0.11868405 = product of:
        0.59342027 = sum of:
          0.07620395 = weight(abstract_txt:correlate in 5249) [ClassicSimilarity], result of:
            0.07620395 = score(doc=5249,freq=1.0), product of:
              0.18078116 = queryWeight, product of:
                1.217503 = boost
                7.7079034 = idf(docFreq=53, maxDocs=44218)
                0.019264018 = queryNorm
              0.42152596 = fieldWeight in 5249, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.7079034 = idf(docFreq=53, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5249)
          0.03321997 = weight(abstract_txt:number in 5249) [ClassicSimilarity], result of:
            0.03321997 = score(doc=5249,freq=2.0), product of:
              0.1039364 = queryWeight, product of:
                1.3055463 = boost
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.019264018 = queryNorm
              0.31961825 = fieldWeight in 5249, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5249)
          0.09901837 = weight(abstract_txt:frequency in 5249) [ClassicSimilarity], result of:
            0.09901837 = score(doc=5249,freq=2.0), product of:
              0.2152676 = queryWeight, product of:
                1.8788745 = boost
                5.947494 = idf(docFreq=313, maxDocs=44218)
                0.019264018 = queryNorm
              0.45997804 = fieldWeight in 5249, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.947494 = idf(docFreq=313, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5249)
          0.2422702 = weight(abstract_txt:periodicals in 5249) [ClassicSimilarity], result of:
            0.2422702 = score(doc=5249,freq=3.0), product of:
              0.39087224 = queryWeight, product of:
                3.1007838 = boost
                6.543596 = idf(docFreq=172, maxDocs=44218)
                0.019264018 = queryNorm
              0.6198194 = fieldWeight in 5249, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.543596 = idf(docFreq=172, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5249)
          0.14270775 = weight(abstract_txt:publication in 5249) [ClassicSimilarity], result of:
            0.14270775 = score(doc=5249,freq=2.0), product of:
              0.34605348 = queryWeight, product of:
                3.3689537 = boost
                5.3321366 = idf(docFreq=580, maxDocs=44218)
                0.019264018 = queryNorm
              0.4123864 = fieldWeight in 5249, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.3321366 = idf(docFreq=580, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5249)
        0.2 = coord(5/25)
    
  3. Youngen, G.K.: Citation patterns to traditional and electronic preprints in the published literature (1998) 0.12
    0.11680793 = sum of:
      0.11680793 = product of:
        0.5840396 = sum of:
          0.060725555 = weight(abstract_txt:revision in 3360) [ClassicSimilarity], result of:
            0.060725555 = score(doc=3360,freq=1.0), product of:
              0.122503325 = queryWeight, product of:
                1.0022299 = boost
                6.345029 = idf(docFreq=210, maxDocs=44218)
                0.019264018 = queryNorm
              0.49570537 = fieldWeight in 3360, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.345029 = idf(docFreq=210, maxDocs=44218)
                0.078125 = fieldNorm(doc=3360)
          0.0474571 = weight(abstract_txt:number in 3360) [ClassicSimilarity], result of:
            0.0474571 = score(doc=3360,freq=2.0), product of:
              0.1039364 = queryWeight, product of:
                1.3055463 = boost
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.019264018 = queryNorm
              0.4565975 = fieldWeight in 3360, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.078125 = fieldNorm(doc=3360)
          0.049110696 = weight(abstract_txt:years in 3360) [ClassicSimilarity], result of:
            0.049110696 = score(doc=3360,freq=1.0), product of:
              0.13397618 = queryWeight, product of:
                1.4822527 = boost
                4.692005 = idf(docFreq=1101, maxDocs=44218)
                0.019264018 = queryNorm
              0.3665629 = fieldWeight in 3360, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.692005 = idf(docFreq=1101, maxDocs=44218)
                0.078125 = fieldNorm(doc=3360)
          0.2825897 = weight(abstract_txt:periodicals in 3360) [ClassicSimilarity], result of:
            0.2825897 = score(doc=3360,freq=2.0), product of:
              0.39087224 = queryWeight, product of:
                3.1007838 = boost
                6.543596 = idf(docFreq=172, maxDocs=44218)
                0.019264018 = queryNorm
              0.72297204 = fieldWeight in 3360, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.543596 = idf(docFreq=172, maxDocs=44218)
                0.078125 = fieldNorm(doc=3360)
          0.14415659 = weight(abstract_txt:publication in 3360) [ClassicSimilarity], result of:
            0.14415659 = score(doc=3360,freq=1.0), product of:
              0.34605348 = queryWeight, product of:
                3.3689537 = boost
                5.3321366 = idf(docFreq=580, maxDocs=44218)
                0.019264018 = queryNorm
              0.41657317 = fieldWeight in 3360, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.3321366 = idf(docFreq=580, maxDocs=44218)
                0.078125 = fieldNorm(doc=3360)
        0.2 = coord(5/25)
    
  4. Chung, Y.-K.: Core international journals of classification systems : an application of Bradford's law (1994) 0.09
    0.088364445 = sum of:
      0.088364445 = product of:
        0.5522778 = sum of:
          0.13025615 = weight(abstract_txt:productive in 5070) [ClassicSimilarity], result of:
            0.13025615 = score(doc=5070,freq=2.0), product of:
              0.16171701 = queryWeight, product of:
                1.1515195 = boost
                7.290168 = idf(docFreq=81, maxDocs=44218)
                0.019264018 = queryNorm
              0.8054573 = fieldWeight in 5070, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.290168 = idf(docFreq=81, maxDocs=44218)
                0.078125 = fieldNorm(doc=5070)
          0.049110696 = weight(abstract_txt:years in 5070) [ClassicSimilarity], result of:
            0.049110696 = score(doc=5070,freq=1.0), product of:
              0.13397618 = queryWeight, product of:
                1.4822527 = boost
                4.692005 = idf(docFreq=1101, maxDocs=44218)
                0.019264018 = queryNorm
              0.3665629 = fieldWeight in 5070, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.692005 = idf(docFreq=1101, maxDocs=44218)
                0.078125 = fieldNorm(doc=5070)
          0.054132186 = weight(abstract_txt:during in 5070) [ClassicSimilarity], result of:
            0.054132186 = score(doc=5070,freq=1.0), product of:
              0.14295979 = queryWeight, product of:
                1.5311418 = boost
                4.846761 = idf(docFreq=943, maxDocs=44218)
                0.019264018 = queryNorm
              0.37865323 = fieldWeight in 5070, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.846761 = idf(docFreq=943, maxDocs=44218)
                0.078125 = fieldNorm(doc=5070)
          0.31877875 = weight(abstract_txt:bradford's in 5070) [ClassicSimilarity], result of:
            0.31877875 = score(doc=5070,freq=1.0), product of:
              0.4661973 = queryWeight, product of:
                2.7649884 = boost
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.019264018 = queryNorm
              0.683785 = fieldWeight in 5070, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.078125 = fieldNorm(doc=5070)
        0.16 = coord(4/25)
    
  5. Degen, E.-M.: ¬Der Erlanger Katalogverbund : Geschichte und Nutzen (1996) 0.09
    0.086313546 = sum of:
      0.086313546 = product of:
        0.7192796 = sum of:
          0.12183479 = weight(abstract_txt:1987 in 5518) [ClassicSimilarity], result of:
            0.12183479 = score(doc=5518,freq=1.0), product of:
              0.1557145 = queryWeight, product of:
                1.1299467 = boost
                7.1535926 = idf(docFreq=93, maxDocs=44218)
                0.019264018 = queryNorm
              0.7824242 = fieldWeight in 5518, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1535926 = idf(docFreq=93, maxDocs=44218)
                0.109375 = fieldNorm(doc=5518)
          0.39562556 = weight(abstract_txt:periodicals in 5518) [ClassicSimilarity], result of:
            0.39562556 = score(doc=5518,freq=2.0), product of:
              0.39087224 = queryWeight, product of:
                3.1007838 = boost
                6.543596 = idf(docFreq=172, maxDocs=44218)
                0.019264018 = queryNorm
              1.0121608 = fieldWeight in 5518, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.543596 = idf(docFreq=172, maxDocs=44218)
                0.109375 = fieldNorm(doc=5518)
          0.20181923 = weight(abstract_txt:publication in 5518) [ClassicSimilarity], result of:
            0.20181923 = score(doc=5518,freq=1.0), product of:
              0.34605348 = queryWeight, product of:
                3.3689537 = boost
                5.3321366 = idf(docFreq=580, maxDocs=44218)
                0.019264018 = queryNorm
              0.5832024 = fieldWeight in 5518, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.3321366 = idf(docFreq=580, maxDocs=44218)
                0.109375 = fieldNorm(doc=5518)
        0.12 = coord(3/25)