Search (2 results, page 1 of 1)

  • × author_ss:"Lancaster, F.W."
  • × type_ss:"a"
  • × year_i:[2000 TO 2010}
  1. Lancaster, F.W.: Do indexing and abstracting have a future? (2003) 0.00
    0.0019624678 = product of:
      0.010793572 = sum of:
        0.0066271294 = weight(_text_:a in 3761) [ClassicSimilarity], result of:
          0.0066271294 = score(doc=3761,freq=4.0), product of:
            0.030653298 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.026584605 = queryNorm
            0.2161963 = fieldWeight in 3761, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.09375 = fieldNorm(doc=3761)
        0.0041664424 = weight(_text_:s in 3761) [ClassicSimilarity], result of:
          0.0041664424 = score(doc=3761,freq=2.0), product of:
            0.028903782 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.026584605 = queryNorm
            0.14414869 = fieldWeight in 3761, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.09375 = fieldNorm(doc=3761)
      0.18181819 = coord(2/11)
    
    Source
    Anales de documentación. 6(2003), S.277-288
    Type
    a
  2. Lancaster, F.W.: Precision and recall (2009) 0.00
    4.0164427E-4 = product of:
      0.0044180867 = sum of:
        0.0044180867 = weight(_text_:a in 3866) [ClassicSimilarity], result of:
          0.0044180867 = score(doc=3866,freq=4.0), product of:
            0.030653298 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.026584605 = queryNorm
            0.14413087 = fieldWeight in 3866, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=3866)
      0.09090909 = coord(1/11)
    
    Abstract
    F.W. Lancaster's work has been immensely influential in library and information science. He has written on indexing and information system evaluation, and has been looked to as a pioneer in many areas. Here he describes precision and recall, the two most fundamental and widespread measures of information retrieval effectiveness.
    Type
    a