Search (2 results, page 1 of 1)

  • × author_ss:"Lancaster, F.W."
  • × language_ss:"e"
  • × theme_ss:"Retrievalstudien"
  • × year_i:[1960 TO 1970}
  1. Lancaster, F.W.: MEDLARS : report on the evaluation of its operating effiency (1961) 0.01
    0.006865305 = product of:
      0.04805713 = sum of:
        0.012107591 = weight(_text_:information in 1931) [ClassicSimilarity], result of:
          0.012107591 = score(doc=1931,freq=2.0), product of:
            0.052020688 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.029633347 = queryNorm
            0.23274569 = fieldWeight in 1931, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.09375 = fieldNorm(doc=1931)
        0.03594954 = weight(_text_:retrieval in 1931) [ClassicSimilarity], result of:
          0.03594954 = score(doc=1931,freq=2.0), product of:
            0.08963835 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.029633347 = queryNorm
            0.40105087 = fieldWeight in 1931, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.09375 = fieldNorm(doc=1931)
      0.14285715 = coord(2/14)
    
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.223-246.
  2. Lancaster, F.W.: On the need for role indicators in postcoordinate retrieval systems (1968) 0.00
    0.0017118829 = product of:
      0.023966359 = sum of:
        0.023966359 = weight(_text_:retrieval in 8948) [ClassicSimilarity], result of:
          0.023966359 = score(doc=8948,freq=2.0), product of:
            0.08963835 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.029633347 = queryNorm
            0.26736724 = fieldWeight in 8948, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0625 = fieldNorm(doc=8948)
      0.071428575 = coord(1/14)