Search (4 results, page 1 of 1)

  • × author_ss:"Walker, S."
  • × language_ss:"e"
  • × theme_ss:"OPAC"
  1. Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990) 0.01
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    Content
    1. Introduction // 2. Query modification through relevance feedback // 3. System design & description 4. Evaluation // 5. Analysis & results // 6. Conclusions and recommendations
  2. Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992) 0.01
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    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
  3. Walker, S.: Improving subject access painlessly : recent work on the Okapi online catalogue projects (1988) 0.01
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    Source
    Program. 22(1988), S.21-31
  4. Walker, S.: ¬The Okapi online catalogue research projects (1989) 0.00
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    Date
    16. 8.1998 11:22:08