Search (3 results, page 1 of 1)

  • × author_ss:"Walker, S."
  • × theme_ss:"OPAC"
  • × theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
  1. Walker, S.: Subject access in online catalogues (1991) 0.01 
    0.010734284 = product of:
  0.057249516 = sum of:
    0.012781745 = product of:
      0.02556349 = sum of:
        0.02556349 = weight(_text_:online in 5690) [ClassicSimilarity], result of:
          0.02556349 = score(doc=5690,freq=2.0), product of:
            0.09529729 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.031400457 = queryNorm
            0.2682499 = fieldWeight in 5690, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0625 = fieldNorm(doc=5690)
      0.5 = coord(1/2)
    0.008553064 = weight(_text_:information in 5690) [ClassicSimilarity], result of:
      0.008553064 = score(doc=5690,freq=2.0), product of:
        0.055122808 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.031400457 = queryNorm
        0.1551638 = fieldWeight in 5690, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=5690)
    0.035914708 = weight(_text_:retrieval in 5690) [ClassicSimilarity], result of:
      0.035914708 = score(doc=5690,freq=4.0), product of:
        0.09498371 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.031400457 = queryNorm
        0.37811437 = fieldWeight in 5690, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0625 = fieldNorm(doc=5690)
  0.1875 = coord(3/16)
    Abstract
    Discusses some of the methods of subject access to on-line catalohues (OPACs) and argues that none are entirley satisfactory. Describes 2 methods for improving subject access: best match searching; and automatic query expansion application and discusses their feasibility. Mentions emerging application standards for information retrieval and concludes that existing standards are incompatible with most methods for improving standards
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  2. Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990) 0.01 
    0.0076088207 = product of:
  0.060870565 = sum of:
    0.01597718 = product of:
      0.03195436 = sum of:
        0.03195436 = weight(_text_:online in 1816) [ClassicSimilarity], result of:
          0.03195436 = score(doc=1816,freq=2.0), product of:
            0.09529729 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.031400457 = queryNorm
            0.33531237 = fieldWeight in 1816, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.078125 = fieldNorm(doc=1816)
      0.5 = coord(1/2)
    0.044893384 = weight(_text_:retrieval in 1816) [ClassicSimilarity], result of:
      0.044893384 = score(doc=1816,freq=4.0), product of:
        0.09498371 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.031400457 = queryNorm
        0.47264296 = fieldWeight in 1816, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.078125 = fieldNorm(doc=1816)
  0.125 = coord(2/16)
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  3. Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992) 0.00 
    0.0041756397 = product of:
  0.033405118 = sum of:
    0.0111840265 = product of:
      0.022368053 = sum of:
        0.022368053 = weight(_text_:online in 2731) [ClassicSimilarity], result of:
          0.022368053 = score(doc=2731,freq=2.0), product of:
            0.09529729 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.031400457 = queryNorm
            0.23471867 = fieldWeight in 2731, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0546875 = fieldNorm(doc=2731)
      0.5 = coord(1/2)
    0.022221092 = weight(_text_:retrieval in 2731) [ClassicSimilarity], result of:
      0.022221092 = score(doc=2731,freq=2.0), product of:
        0.09498371 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.031400457 = queryNorm
        0.23394634 = fieldWeight in 2731, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2731)
  0.125 = coord(2/16)
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval

Authors

Types