Search (4 results, page 1 of 1)

  • × theme_ss:"Retrievalstudien"
  • × year_i:[1970 TO 1980}
  1. King, D.W.; Bryant, E.C.: ¬The evaluation of information services and products (1971) 0.02
    0.017463814 = product of:
      0.06985526 = sum of:
        0.06985526 = weight(_text_:services in 4157) [ClassicSimilarity], result of:
          0.06985526 = score(doc=4157,freq=2.0), product of:
            0.17221296 = queryWeight, product of:
              3.6713707 = idf(docFreq=3057, maxDocs=44218)
              0.046906993 = queryNorm
            0.405633 = fieldWeight in 4157, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.6713707 = idf(docFreq=3057, maxDocs=44218)
              0.078125 = fieldNorm(doc=4157)
      0.25 = coord(1/4)
    
  2. Byrne, J.R.: Relative effectiveness of titles, abstracts, and subject headings for machine retrieval from the COMPENDEX services (1975) 0.01
    0.012224671 = product of:
      0.048898686 = sum of:
        0.048898686 = weight(_text_:services in 1604) [ClassicSimilarity], result of:
          0.048898686 = score(doc=1604,freq=2.0), product of:
            0.17221296 = queryWeight, product of:
              3.6713707 = idf(docFreq=3057, maxDocs=44218)
              0.046906993 = queryNorm
            0.28394312 = fieldWeight in 1604, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.6713707 = idf(docFreq=3057, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1604)
      0.25 = coord(1/4)
    
  3. Cooper, W.S.: ¬The paradoxal role of unexamined documents in the evaluation of retrieval effectiveness (1976) 0.01
    0.011775794 = product of:
      0.047103178 = sum of:
        0.047103178 = product of:
          0.094206356 = sum of:
            0.094206356 = weight(_text_:management in 2186) [ClassicSimilarity], result of:
              0.094206356 = score(doc=2186,freq=2.0), product of:
                0.15810528 = queryWeight, product of:
                  3.3706124 = idf(docFreq=4130, maxDocs=44218)
                  0.046906993 = queryNorm
                0.5958457 = fieldWeight in 2186, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3706124 = idf(docFreq=4130, maxDocs=44218)
                  0.125 = fieldNorm(doc=2186)
          0.5 = coord(1/2)
      0.25 = coord(1/4)
    
    Source
    Information processing and management. 12(1976), S.367-375
  4. Rijsbergen, C.J. van: ¬A test for the separation of relevant and non-relevant documents in experimental retrieval collections (1973) 0.01
    0.0063552503 = product of:
      0.025421001 = sum of:
        0.025421001 = product of:
          0.050842002 = sum of:
            0.050842002 = weight(_text_:22 in 5002) [ClassicSimilarity], result of:
              0.050842002 = score(doc=5002,freq=2.0), product of:
                0.1642603 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.046906993 = queryNorm
                0.30952093 = fieldWeight in 5002, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0625 = fieldNorm(doc=5002)
          0.5 = coord(1/2)
      0.25 = coord(1/4)
    
    Date
    19. 3.1996 11:22:12