Search (7 results, page 1 of 1)

  • × author_ss:"Walker, S."
  • × theme_ss:"OPAC"
  1. Walker, S.: Improving subject access painlessly : recent work on the Okapi online catalogue projects (1988) 0.00
    0.0047181365 = product of:
      0.042463228 = sum of:
        0.042463228 = product of:
          0.084926456 = sum of:
            0.084926456 = weight(_text_:22 in 7403) [ClassicSimilarity], result of:
              0.084926456 = score(doc=7403,freq=2.0), product of:
                0.13719016 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03917671 = queryNorm
                0.61904186 = fieldWeight in 7403, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.125 = fieldNorm(doc=7403)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Source
    Program. 22(1988), S.21-31
  2. Walker, S.: ¬The Okapi online catalogue research projects (1989) 0.00
    0.0029488353 = product of:
      0.026539518 = sum of:
        0.026539518 = product of:
          0.053079035 = sum of:
            0.053079035 = weight(_text_:22 in 1942) [ClassicSimilarity], result of:
              0.053079035 = score(doc=1942,freq=2.0), product of:
                0.13719016 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03917671 = queryNorm
                0.38690117 = fieldWeight in 1942, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.078125 = fieldNorm(doc=1942)
          0.5 = coord(1/2)
      0.11111111 = coord(1/9)
    
    Date
    16. 8.1998 11:22:08
  3. Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992) 0.00
    0.0020165213 = product of:
      0.018148692 = sum of:
        0.018148692 = weight(_text_:of in 2731) [ClassicSimilarity], result of:
          0.018148692 = score(doc=2731,freq=12.0), product of:
            0.061262865 = queryWeight, product of:
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.03917671 = queryNorm
            0.29624295 = fieldWeight in 2731, product of:
              3.4641016 = tf(freq=12.0), with freq of:
                12.0 = termFreq=12.0
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.0546875 = fieldNorm(doc=2731)
      0.11111111 = coord(1/9)
    
    Abstract
    An automatic query expansion (AQE) facility in anonline catalogue was evaluated in an operational library setting. The OKAPI experimental system had other features including: ranked output 'best match' keyword searching, automatic stemming, spelling normalisation and cross referencing as well as relevance feedback. A combination of transaction log analysis, search replays, questionnaires and interviews was used for data collection. Findings show that contrary to previous results, AQE was beneficial in a substantial number of searches. Use intentions, the effectiveness of the 'best match' search and user interaction were identified as the main factors affecting the take-up of the query expansion facility
    Source
    Journal of documentation. 48(1992) no.4, S.406-421
  4. Walker, S.: Ease of use in online catalogues : a plea for the user (1986) 0.00
    0.0018816947 = product of:
      0.016935252 = sum of:
        0.016935252 = weight(_text_:of in 375) [ClassicSimilarity], result of:
          0.016935252 = score(doc=375,freq=2.0), product of:
            0.061262865 = queryWeight, product of:
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.03917671 = queryNorm
            0.27643585 = fieldWeight in 375, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.125 = fieldNorm(doc=375)
      0.11111111 = coord(1/9)
    
  5. Walker, S.: Subject access in online catalogues (1991) 0.00
    0.0016295954 = product of:
      0.014666359 = sum of:
        0.014666359 = weight(_text_:of in 5690) [ClassicSimilarity], result of:
          0.014666359 = score(doc=5690,freq=6.0), product of:
            0.061262865 = queryWeight, product of:
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.03917671 = queryNorm
            0.23940048 = fieldWeight in 5690, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.0625 = fieldNorm(doc=5690)
      0.11111111 = coord(1/9)
    
    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
    Source
    OPACs and the user: Proc. of the 3rd Anglo-Nordic seminar, Apr. 90
  6. Mitev, N.N.; Walker, S.: Information retrieval aids in an online public access catalogue : automatic intelligent search sequencing (1985) 0.00
    0.0014112709 = product of:
      0.012701439 = sum of:
        0.012701439 = weight(_text_:of in 337) [ClassicSimilarity], result of:
          0.012701439 = score(doc=337,freq=2.0), product of:
            0.061262865 = queryWeight, product of:
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.03917671 = queryNorm
            0.20732689 = fieldWeight in 337, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.09375 = fieldNorm(doc=337)
      0.11111111 = coord(1/9)
    
    Source
    Advances in intelligent retrieval: Proc. of a Conf. ... Wadham College, Oxford, 16.-17.4.1985. Intr.: M. Rowbottom
  7. Robertson, S.E.; Walker, S.; Beaulieu, M.: Experimentation as a way of life : Okapi at TREC (2000) 0.00
    0.0014112709 = product of:
      0.012701439 = sum of:
        0.012701439 = weight(_text_:of in 6030) [ClassicSimilarity], result of:
          0.012701439 = score(doc=6030,freq=2.0), product of:
            0.061262865 = queryWeight, product of:
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.03917671 = queryNorm
            0.20732689 = fieldWeight in 6030, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.5637573 = idf(docFreq=25162, maxDocs=44218)
              0.09375 = fieldNorm(doc=6030)
      0.11111111 = coord(1/9)