Search (108 results, page 1 of 6)

  • × year_i:[2000 TO 2010}
  • × theme_ss:"OPAC"
  1. Horn, M.E.: "Garbage" in, "refuse and refuse disposal" out : making the most of the subject authority file in the OPAC (2002) 0.03 
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    Date
    10. 9.2000 17:38:22
    Language
    e
  2. Beccaria, M.; Scott, D.: Fac-Back-OPAC : an open source interface to your library system (2007) 0.03 
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    Date
    17. 8.2008 11:22:47
    Language
    e
  3. Moulaison, H.L.: OPAC queries at a medium-sized academic library : a transaction log analysis (2008) 0.03 
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    Date
    10. 9.2000 17:38:22
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    e
  4. Lam, V.-T.: Enhancing subject access to monographs in Online Public Access Catalogs : table of contents added to bibliographic records (2000) 0.02 
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    Date
    22. 9.1997 19:16:05
    Language
    e
  5. Li, Y.-O.; Leung, S.W.: Computer cataloging of electronic Journals in unstable Aggregator Databases the Hong Kong Baptist University Library experience (2001) 0.02 
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    Date
    10. 9.2000 17:38:22
    Language
    e
  6. Golderman, G.M.; Connolly, B.: Between the book covers : going beyond OPAC keyword searching with the deep linking capabilities of Google Scholar and Google Book Search (2004/05) 0.02 
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    Date
    2.12.2007 19:39:22
    Language
    e
  7. Greifeneder, E.: Hilfe auf allen Ebenen : ein Beitrag zur Forschung über Online-Hilfen in OPACs (2008) 0.02 
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    Date
    22. 6.2008 13:29:15
    Footnote
    Vgl. auch: Greifeneder, E.: Online-Hilfen in OPACs: Analyse deutscher Universitäts-Onlinekataloge. Saarbrücken: VDM Verlag Dr. Müller 2007.
  8. Khoo, C.S.G.; Wan, K.-W.: ¬A simple relevancy-ranking strategy for an interface to Boolean OPACs (2004) 0.02 
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    Abstract
    A relevancy-ranking algorithm for a natural language interface to Boolean online public access catalogs (OPACs) was formulated and compared with that currently used in a knowledge-based search interface called the E-Referencer, being developed by the authors. The algorithm makes use of seven weIl-known ranking criteria: breadth of match, section weighting, proximity of query words, variant word forms (stemming), document frequency, term frequency and document length. The algorithm converts a natural language query into a series of increasingly broader Boolean search statements. In a small experiment with ten subjects in which the algorithm was simulated by hand, the algorithm obtained good results with a mean overall precision of 0.42 and mean average precision of 0.62, representing a 27 percent improvement in precision and 41 percent improvement in average precision compared to the E-Referencer. The usefulness of each step in the algorithm was analyzed and suggestions are made for improving the algorithm.
    Content
    "Most Web search engines accept natural language queries, perform some kind of fuzzy matching and produce ranked output, displaying first the documents that are most likely to be relevant. On the other hand, most library online public access catalogs (OPACs) an the Web are still Boolean retrieval systems that perform exact matching, and require users to express their search requests precisely in a Boolean search language and to refine their search statements to improve the search results. It is well-documented that users have difficulty searching Boolean OPACs effectively (e.g. Borgman, 1996; Ensor, 1992; Wallace, 1993). One approach to making OPACs easier to use is to develop a natural language search interface that acts as a middleware between the user's Web browser and the OPAC system. The search interface can accept a natural language query from the user and reformulate it as a series of Boolean search statements that are then submitted to the OPAC. The records retrieved by the OPAC are ranked by the search interface before forwarding them to the user's Web browser. The user, then, does not need to interact directly with the Boolean OPAC but with the natural language search interface or search intermediary. The search interface interacts with the OPAC system an the user's behalf. The advantage of this approach is that no modification to the OPAC or library system is required. Furthermore, the search interface can access multiple OPACs, acting as a meta search engine, and integrate search results from various OPACs before sending them to the user. The search interface needs to incorporate a method for converting the user's natural language query into a series of Boolean search statements, and for ranking the OPAC records retrieved. The purpose of this study was to develop a relevancyranking algorithm for a search interface to Boolean OPAC systems. This is part of an on-going effort to develop a knowledge-based search interface to OPACs called the E-Referencer (Khoo et al., 1998, 1999; Poo et al., 2000). E-Referencer v. 2 that has been implemented applies a repertoire of initial search strategies and reformulation strategies to retrieve records from OPACs using the Z39.50 protocol, and also assists users in mapping query keywords to the Library of Congress subject headings."
    Language
    e
    Object
    E-Referencer
    Source
    Electronic library. 22(2004) no.2, S.112-120
  9. Blosser, J.; Michaelson, R.; Routh. R.; Xia, P.: Defining the landscape of Web resources : Concluding Report of the BAER Web Resources Sub-Group (2000) 0.01 
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    Date
    21. 4.2002 10:22:31
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    e
  10. Thomas, D.H.: ¬The effect of interface design on item selection in an online catalog (2001) 0.01 
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    10. 9.2000 17:38:22
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  11. Saving the time of the library user through subject access innovation : Papers in honor of Pauline Atherton Cochrane (2000) 0.01 
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    22. 9.1997 19:16:05
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  12. Schneider, R.: OPACs, Benutzer und das Web (2009) 0.01 
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    22. 2.2009 18:50:43
  13. Hubrich, J.: Input und Output der Schlagwortnormdatei (SWD) : Aufwand zur Sicherstellung der Qualität und Möglichkeiten des Nutzens im OPAC (2005) 0.01 
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    30. 1.2007 18:22:15
  14. Rädler, K.: Kataloganreicherung mit digitalen Inhaltsverzeichnissen eröffnet neue Geschäftsfelder : Erfahrungen aus der Vorarlberger Landesbibliothek (2008) 0.01 
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  15. Ikas, W.-V.; Litten, F.: World Wide Web und Catalogue Enrichment : Möglichkeiten des verbesserten Nachweises von mikroverfilmten Handschriften und Inkunabeln (2007) 0.01 
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    22. 5.2007 11:19:21
  16. Hahn, U.; Schulze, M.: Katalogerweiterungen, Mashups und Elemente der Bibliothek 2.0" in der Praxis : der Katalog der Universitätsbibliothek der Helmut-Schmidt-Universität (IHSU) Universität der Bundeswehr Hamburg (2009) 0.01 
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  17. Oberhauser, O.: Implementierung und Parametrisierung klassifikatorischer Recherchekomponenten im OPAC (2005) 0.01 
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    Mitteilungen der Vereinigung Österreichischer Bibliothekarinnen und Bibliothekare. 58(2005) H.1, S.22-37
  18. Harmsen, B.: Adding value to Web-OPACs (2000) 0.00 
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  19. Beaulieu, M.; Gatford, M.; Jones, S.: Widening access to Okapi (2000) 0.00 
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  20. Ramesh Babu, B.; O'Brien, A.: Web OPAC interfaces : an overview (2000) 0.00 
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