Search (5 results, page 1 of 1)

  • × author_ss:"Lancaster, F.W."
  • × theme_ss:"Retrievalstudien"
  1. Lancaster, F.W.; Connell, T.H.; Bishop, N.; McCowan, S.: Identifying barriers to effective subject access in library catalogs (1991) 0.03 
    0.025526881 = sum of:
  0.021293312 = product of:
    0.08517325 = sum of:
      0.08517325 = weight(_text_:authors in 2259) [ClassicSimilarity], result of:
        0.08517325 = score(doc=2259,freq=2.0), product of:
          0.24157293 = queryWeight, product of:
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.052990302 = queryNorm
          0.35257778 = fieldWeight in 2259, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.0546875 = fieldNorm(doc=2259)
    0.25 = coord(1/4)
  0.004233568 = product of:
    0.008467136 = sum of:
      0.008467136 = weight(_text_:e in 2259) [ClassicSimilarity], result of:
        0.008467136 = score(doc=2259,freq=2.0), product of:
          0.07616667 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.052990302 = 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)
    0.5 = coord(1/2)
    Abstract
    51 subject searches were performed in an online catalog containing about 4,5 million records. Their success was judges in terms of lists of items, known to be relevant to the various topics, compiled by subject specialists (faculty members or authors of articles in specialized encyclopedias). Many of the items known to be relevant were not retrieved, even in very broad searches that sometimes retrieved several hundred records, and very little could be done to make them retrievable within the constraints of present cataloging practice. Librarians should recognize that library catalogs, as now implemented, offer only the most primitive of subject access and should seek to develop different types of subject access tools. - Vgl auch Letter (B.H. Weinberg) in: LTRS 36(1992) S.123-124.
    Language
    e
  2. Lancaster, F.W.: Evaluation within the environment of an operating information service (1981) 0.00 
    0.004233568 = product of:
  0.008467136 = sum of:
    0.008467136 = product of:
      0.016934272 = sum of:
        0.016934272 = weight(_text_:e in 3150) [ClassicSimilarity], result of:
          0.016934272 = score(doc=3150,freq=2.0), product of:
            0.07616667 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.052990302 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  3. Lancaster, F.W.: MEDLARS : report on the evaluation of its operating effiency (1961) 0.00 
    0.0036287727 = product of:
  0.0072575454 = sum of:
    0.0072575454 = product of:
      0.014515091 = sum of:
        0.014515091 = weight(_text_:e in 1931) [ClassicSimilarity], result of:
          0.014515091 = score(doc=1931,freq=2.0), product of:
            0.07616667 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.052990302 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  4. Lancaster, F.W.: On the need for role indicators in postcoordinate retrieval systems (1968) 0.00 
    0.0024191819 = product of:
  0.0048383637 = sum of:
    0.0048383637 = product of:
      0.0096767275 = sum of:
        0.0096767275 = weight(_text_:e in 8948) [ClassicSimilarity], result of:
          0.0096767275 = score(doc=8948,freq=2.0), product of:
            0.07616667 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.052990302 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  5. Lancaster, F.W.: Evaluating the performance of a large computerized information system (1985) 0.00 
    0.0012095909 = product of:
  0.0024191819 = sum of:
    0.0024191819 = product of:
      0.0048383637 = sum of:
        0.0048383637 = weight(_text_:e in 3649) [ClassicSimilarity], result of:
          0.0048383637 = score(doc=3649,freq=2.0), product of:
            0.07616667 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.052990302 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e

Authors

Years