Search (19 results, page 1 of 1)

  • × author_ss:"Rijsbergen, C.J. van"
  1. Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983) 0.13
    0.1260274 = product of:
      0.2520548 = sum of:
        0.21054365 = weight(_text_:van in 2134) [ClassicSimilarity], result of:
          0.21054365 = score(doc=2134,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.86258465 = fieldWeight in 2134, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.109375 = fieldNorm(doc=2134)
        0.041511156 = product of:
          0.08302231 = sum of:
            0.08302231 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
              0.08302231 = score(doc=2134,freq=2.0), product of:
                0.15327339 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.043769516 = queryNorm
                0.5416616 = fieldWeight in 2134, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.109375 = fieldNorm(doc=2134)
          0.5 = coord(1/2)
      0.5 = coord(2/4)
    
    Date
    30. 3.2001 13:32:22
  2. Rijsbergen, C.J. van: Foundations of evaluation (1974) 0.08
    0.075194165 = product of:
      0.30077666 = sum of:
        0.30077666 = weight(_text_:van in 1078) [ClassicSimilarity], result of:
          0.30077666 = score(doc=1078,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            1.2322638 = fieldWeight in 1078, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.15625 = fieldNorm(doc=1078)
      0.25 = coord(1/4)
    
  3. Rijsbergen, C.J. van: ¬A test for the separation of relevant and non-relevant documents in experimental retrieval collections (1973) 0.07
    0.072015665 = product of:
      0.14403133 = sum of:
        0.120310664 = weight(_text_:van in 5002) [ClassicSimilarity], result of:
          0.120310664 = score(doc=5002,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.49290553 = fieldWeight in 5002, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.0625 = fieldNorm(doc=5002)
        0.023720661 = product of:
          0.047441322 = sum of:
            0.047441322 = weight(_text_:22 in 5002) [ClassicSimilarity], result of:
              0.047441322 = score(doc=5002,freq=2.0), product of:
                0.15327339 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.043769516 = 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)
      0.5 = coord(2/4)
    
    Date
    19. 3.1996 11:22:12
  4. Rijsbergen, C.J. van: Automatic classification in information retrieval (1978) 0.06
    0.060155332 = product of:
      0.24062133 = sum of:
        0.24062133 = weight(_text_:van in 2412) [ClassicSimilarity], result of:
          0.24062133 = score(doc=2412,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.98581105 = fieldWeight in 2412, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.125 = fieldNorm(doc=2412)
      0.25 = coord(1/4)
    
  5. Rijsbergen, C.J. van: ¬A fast hierarchic clustering algorithm (1970) 0.06
    0.060155332 = product of:
      0.24062133 = sum of:
        0.24062133 = weight(_text_:van in 3300) [ClassicSimilarity], result of:
          0.24062133 = score(doc=3300,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.98581105 = fieldWeight in 3300, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.125 = fieldNorm(doc=3300)
      0.25 = coord(1/4)
    
  6. Dunlop, M.D.; Rijsbergen, C.J. van: Hypermedia and free text retrieval (1993) 0.06
    0.060155332 = product of:
      0.24062133 = sum of:
        0.24062133 = weight(_text_:van in 4709) [ClassicSimilarity], result of:
          0.24062133 = score(doc=4709,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.98581105 = fieldWeight in 4709, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.125 = fieldNorm(doc=4709)
      0.25 = coord(1/4)
    
  7. Jardine, N.; Rijsbergen, C.J. van: ¬The use of hierarchic clustering in information retrieval (1971) 0.06
    0.060155332 = product of:
      0.24062133 = sum of:
        0.24062133 = weight(_text_:van in 5170) [ClassicSimilarity], result of:
          0.24062133 = score(doc=5170,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.98581105 = fieldWeight in 5170, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.125 = fieldNorm(doc=5170)
      0.25 = coord(1/4)
    
  8. Rijsbergen, C.J. van: Retrieval effectiveness (1981) 0.06
    0.060155332 = product of:
      0.24062133 = sum of:
        0.24062133 = weight(_text_:van in 3147) [ClassicSimilarity], result of:
          0.24062133 = score(doc=3147,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.98581105 = fieldWeight in 3147, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.125 = fieldNorm(doc=3147)
      0.25 = coord(1/4)
    
  9. Rijsbergen, C.J. van: Information retrieval (1979) 0.06
    0.056858614 = product of:
      0.11371723 = sum of:
        0.10527182 = weight(_text_:van in 856) [ClassicSimilarity], result of:
          0.10527182 = score(doc=856,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.43129233 = fieldWeight in 856, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.0546875 = fieldNorm(doc=856)
        0.008445405 = product of:
          0.01689081 = sum of:
            0.01689081 = weight(_text_:der in 856) [ClassicSimilarity], result of:
              0.01689081 = score(doc=856,freq=2.0), product of:
                0.09777089 = queryWeight, product of:
                  2.2337668 = idf(docFreq=12875, maxDocs=44218)
                  0.043769516 = queryNorm
                0.17275909 = fieldWeight in 856, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.2337668 = idf(docFreq=12875, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=856)
          0.5 = coord(1/2)
      0.5 = coord(2/4)
    
    Footnote
    Text des Buches auch auf der Beilage CD von: Belew, R.K.: Finding out about: a cognitive perspective on search engine technology and the WWW. Cambridge: Cambridge University Press 2001. XXVII, 356 S. + 1 CD-ROM. ISBN 0-521-63028-2. [Sign.: 63 TWD 113]
  10. Crestani, F.; Rijsbergen, C.J. van: Information retrieval by imaging (1996) 0.05
    0.054011747 = product of:
      0.108023494 = sum of:
        0.090233 = weight(_text_:van in 6967) [ClassicSimilarity], result of:
          0.090233 = score(doc=6967,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.36967915 = fieldWeight in 6967, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.046875 = fieldNorm(doc=6967)
        0.017790494 = product of:
          0.03558099 = sum of:
            0.03558099 = weight(_text_:22 in 6967) [ClassicSimilarity], result of:
              0.03558099 = score(doc=6967,freq=2.0), product of:
                0.15327339 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.043769516 = queryNorm
                0.23214069 = fieldWeight in 6967, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.046875 = fieldNorm(doc=6967)
          0.5 = coord(1/2)
      0.5 = coord(2/4)
    
    Source
    Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
  11. Jose, J.M.; Joho, H.; Rijsbergen, C.J. van: Adaptive information retrieval : introduction to the special topic issue of information processing and management (2008) 0.05
    0.0451165 = product of:
      0.180466 = sum of:
        0.180466 = weight(_text_:van in 6243) [ClassicSimilarity], result of:
          0.180466 = score(doc=6243,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.7393583 = fieldWeight in 6243, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.09375 = fieldNorm(doc=6243)
      0.25 = coord(1/4)
    
  12. Rijsbergen, C.J. van: ¬A non-classical logic for information retrieval (1986) 0.05
    0.0451165 = product of:
      0.180466 = sum of:
        0.180466 = weight(_text_:van in 1933) [ClassicSimilarity], result of:
          0.180466 = score(doc=1933,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.7393583 = fieldWeight in 1933, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.09375 = fieldNorm(doc=1933)
      0.25 = coord(1/4)
    
  13. Salton, G.; Rijsbergen, C.J. van; Maron, M.E.: Panel on key issues in information retrieval (1983) 0.04
    0.042536244 = product of:
      0.17014498 = sum of:
        0.17014498 = weight(_text_:van in 7410) [ClassicSimilarity], result of:
          0.17014498 = score(doc=7410,freq=4.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.6970737 = fieldWeight in 7410, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.0625 = fieldNorm(doc=7410)
      0.25 = coord(1/4)
    
    Abstract
    Contribution to an issue devoted to the 6th Annual International Conference of the Special Interest Group on Information Retrieval of the Association for Computing Machinery (USA) held at the National Library of Medicine, Bethesda, Maryland, from 6-8 June 83. The following papers were presented in session 12 which was a panel on key issues in information retrieval: SALTON, G.: Research problems in automatic information retrieval; RIJSBERGEN, C.J. van: Information retrieval: new directions, old solutions; MARON, M.E.: Open problems in information retrieval
  14. Crestani, F.; Ruthven, I.; Sanderson, M.; Rijsbergen, C.J. van: ¬The troubles with using a logical model of IR on a large collection of documents : experimenting retrieval by logical imaging on TREC (1996) 0.04
    0.037597083 = product of:
      0.15038833 = sum of:
        0.15038833 = weight(_text_:van in 7522) [ClassicSimilarity], result of:
          0.15038833 = score(doc=7522,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.6161319 = fieldWeight in 7522, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.078125 = fieldNorm(doc=7522)
      0.25 = coord(1/4)
    
  15. Crestani, F.; Rijsbergen, C.J. van: Information retrieval by logical imaging (1995) 0.04
    0.03721921 = product of:
      0.14887685 = sum of:
        0.14887685 = weight(_text_:van in 1759) [ClassicSimilarity], result of:
          0.14887685 = score(doc=1759,freq=4.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.60993946 = fieldWeight in 1759, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1759)
      0.25 = coord(1/4)
    
    Abstract
    The evaluation of an implication by imaging is a logical technique developed in the framework of modal logic. Its interpretation in the context of a 'possible worlds' semantics is very appealing for information retrieval. In 19889, Van Rijsbergen suggested its use for solving 1 of the fundamental problems of logical models of information retrieval: the evaluation of the logical implication that a document is relevant to a query if it implies the query. Since then, others have tried to follow that suggestion proposing models and applications, though without much success. Most of these approaches had as their basic assunption the consideration that ' document is a possible world'. Proposes instead an approach based on a completely different assumption: ' a term is a possible world'. This approach enables the exploitation of term-term relationships which are estimated using an information theoretic measure
  16. Sembok, T.M.T.; Rijsbergen, C.J. van: SILOL: a simple logical-linguistic document retrieval system (1990) 0.03
    0.030077666 = product of:
      0.120310664 = sum of:
        0.120310664 = weight(_text_:van in 6684) [ClassicSimilarity], result of:
          0.120310664 = score(doc=6684,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.49290553 = fieldWeight in 6684, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.0625 = fieldNorm(doc=6684)
      0.25 = coord(1/4)
    
  17. Sembok, T.M.T.; Rijsbergen, C.J. van: IMAGING: a relevant feedback retrieval with nearest neighbour clusters (1994) 0.03
    0.030077666 = product of:
      0.120310664 = sum of:
        0.120310664 = weight(_text_:van in 1071) [ClassicSimilarity], result of:
          0.120310664 = score(doc=1071,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.49290553 = fieldWeight in 1071, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.0625 = fieldNorm(doc=1071)
      0.25 = coord(1/4)
    
  18. Sparck Jones, K.; Rijsbergen, C.J. van: Progress in documentation : Information retrieval test collection (1976) 0.03
    0.026317956 = product of:
      0.10527182 = sum of:
        0.10527182 = weight(_text_:van in 4161) [ClassicSimilarity], result of:
          0.10527182 = score(doc=4161,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.43129233 = fieldWeight in 4161, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.0546875 = fieldNorm(doc=4161)
      0.25 = coord(1/4)
    
  19. Rijsbergen, C.J. van; Lalmas, M.: Information calculus for information retrieval (1996) 0.02
    0.018798541 = product of:
      0.075194165 = sum of:
        0.075194165 = weight(_text_:van in 4201) [ClassicSimilarity], result of:
          0.075194165 = score(doc=4201,freq=2.0), product of:
            0.24408463 = queryWeight, product of:
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.043769516 = queryNorm
            0.30806595 = fieldWeight in 4201, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.5765896 = idf(docFreq=454, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4201)
      0.25 = coord(1/4)