Search (3 results, page 1 of 1)

  • × author_ss:"Cooper, W.S."
  • × theme_ss:"Retrievalstudien"
  1. Cooper, W.S.: ¬The paradoxal role of unexamined documents in the evaluation of retrieval effectiveness (1976) 0.02 
    0.01777933 = product of:
  0.08000698 = sum of:
    0.058062583 = weight(_text_:retrieval in 2186) [ClassicSimilarity], result of:
      0.058062583 = score(doc=2186,freq=2.0), product of:
        0.10858208 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.03589591 = queryNorm
        0.5347345 = fieldWeight in 2186, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.125 = fieldNorm(doc=2186)
    0.021944398 = weight(_text_:of in 2186) [ClassicSimilarity], result of:
      0.021944398 = score(doc=2186,freq=4.0), product of:
        0.05613249 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.03589591 = queryNorm
        0.39093933 = fieldWeight in 2186, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.125 = fieldNorm(doc=2186)
  0.22222222 = coord(2/9)
  2. Cooper, W.S.: ¬On selecting a measure of retrieval effectiveness, revisited (1973) 0.02 
    0.017342882 = product of:
  0.07804297 = sum of:
    0.06158467 = weight(_text_:retrieval in 1930) [ClassicSimilarity], result of:
      0.06158467 = score(doc=1930,freq=4.0), product of:
        0.10858208 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.03589591 = queryNorm
        0.5671716 = fieldWeight in 1930, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.09375 = fieldNorm(doc=1930)
    0.016458299 = weight(_text_:of in 1930) [ClassicSimilarity], result of:
      0.016458299 = score(doc=1930,freq=4.0), product of:
        0.05613249 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.03589591 = queryNorm
        0.2932045 = fieldWeight in 1930, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.09375 = fieldNorm(doc=1930)
  0.22222222 = coord(2/9)
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.191-204.
    Source
    Journal of the American Society for Information Science. 24(1973), S.87-100
  3. Cooper, W.S.: Gedanken experimentation : an alternative to traditional system testing? (1981) 0.01 
    0.006451398 = product of:
  0.058062583 = sum of:
    0.058062583 = weight(_text_:retrieval in 3155) [ClassicSimilarity], result of:
      0.058062583 = score(doc=3155,freq=2.0), product of:
        0.10858208 = queryWeight, product of:
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.03589591 = queryNorm
        0.5347345 = fieldWeight in 3155, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.024915 = idf(docFreq=5836, maxDocs=44218)
          0.125 = fieldNorm(doc=3155)
  0.11111111 = coord(1/9)
    Source
    Information retrieval experiment. Ed.: K. Sparck Jones

Years