Search (5 results, page 1 of 1)

  • × author_ss:"Lancaster, F.W."
  • × theme_ss:"Retrievalstudien"
  1. Lancaster, F.W.: MEDLARS : report on the evaluation of its operating effiency (1961) 0.03
    0.030085932 = product of:
      0.060171865 = sum of:
        0.060171865 = product of:
          0.09025779 = sum of:
            0.012436888 = weight(_text_:e in 1931) [ClassicSimilarity], result of:
              0.012436888 = score(doc=1931,freq=2.0), product of:
                0.06526148 = queryWeight, product of:
                  1.43737 = idf(docFreq=28552, maxDocs=44218)
                  0.0454034 = queryNorm
                0.19057012 = fieldWeight in 1931, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.43737 = idf(docFreq=28552, maxDocs=44218)
                  0.09375 = fieldNorm(doc=1931)
            0.077820905 = weight(_text_:p in 1931) [ClassicSimilarity], result of:
              0.077820905 = score(doc=1931,freq=2.0), product of:
                0.1632485 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0454034 = queryNorm
                0.47670212 = fieldWeight in 1931, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.09375 = fieldNorm(doc=1931)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.223-246.
    Language
    e
  2. Lancaster, F.W.: Evaluation within the environment of an operating information service (1981) 0.00
    0.0024182838 = product of:
      0.0048365677 = sum of:
        0.0048365677 = product of:
          0.014509703 = sum of:
            0.014509703 = weight(_text_:e in 3150) [ClassicSimilarity], result of:
              0.014509703 = score(doc=3150,freq=2.0), product of:
                0.06526148 = queryWeight, product of:
                  1.43737 = idf(docFreq=28552, maxDocs=44218)
                  0.0454034 = queryNorm
                0.2223318 = fieldWeight in 3150, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.43737 = idf(docFreq=28552, maxDocs=44218)
                  0.109375 = fieldNorm(doc=3150)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Language
    e
  3. Lancaster, F.W.: On the need for role indicators in postcoordinate retrieval systems (1968) 0.00
    0.0013818766 = product of:
      0.0027637533 = sum of:
        0.0027637533 = product of:
          0.008291259 = sum of:
            0.008291259 = weight(_text_:e in 8948) [ClassicSimilarity], result of:
              0.008291259 = score(doc=8948,freq=2.0), product of:
                0.06526148 = queryWeight, product of:
                  1.43737 = idf(docFreq=28552, maxDocs=44218)
                  0.0454034 = queryNorm
                0.12704675 = fieldWeight in 8948, 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=8948)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Language
    e
  4. Lancaster, F.W.; Connell, T.H.; Bishop, N.; McCowan, S.: Identifying barriers to effective subject access in library catalogs (1991) 0.00
    0.0012091419 = product of:
      0.0024182838 = sum of:
        0.0024182838 = product of:
          0.0072548515 = sum of:
            0.0072548515 = weight(_text_:e in 2259) [ClassicSimilarity], result of:
              0.0072548515 = score(doc=2259,freq=2.0), product of:
                0.06526148 = queryWeight, product of:
                  1.43737 = idf(docFreq=28552, maxDocs=44218)
                  0.0454034 = queryNorm
                0.1111659 = fieldWeight in 2259, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.43737 = idf(docFreq=28552, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=2259)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Language
    e
  5. Lancaster, F.W.: Evaluating the performance of a large computerized information system (1985) 0.00
    6.909383E-4 = product of:
      0.0013818766 = sum of:
        0.0013818766 = product of:
          0.0041456297 = sum of:
            0.0041456297 = weight(_text_:e in 3649) [ClassicSimilarity], result of:
              0.0041456297 = score(doc=3649,freq=2.0), product of:
                0.06526148 = queryWeight, product of:
                  1.43737 = idf(docFreq=28552, maxDocs=44218)
                  0.0454034 = queryNorm
                0.063523374 = fieldWeight in 3649, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.43737 = idf(docFreq=28552, maxDocs=44218)
                  0.03125 = fieldNorm(doc=3649)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Language
    e