Search (131 results, page 1 of 7)

  • × theme_ss:"OPAC"
  • × year_i:[2000 TO 2010}
  1. Hajdu Barát, A.: Usability and the user interfaces of classical information retrieval languages (2006) 0.03 
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    Language
    e
    Source
    Knowledge organization for a global learning society: Proceedings of the 9th International ISKO Conference, 4-7 July 2006, Vienna, Austria. Hrsg.: G. Budin, C. Swertz u. K. Mitgutsch
  2. Rädler, K.: In Bibliothekskatalogen "googlen" : Integration von Inhaltsverzeichnissen, Volltexten und WEB-Ressourcen in Bibliothekskataloge (2004) 0.01 
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    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  3. Khoo, C.S.G.; Wan, K.-W.: ¬A simple relevancy-ranking strategy for an interface to Boolean OPACs (2004) 0.01 
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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
  4. Barber, E., et al: ¬Los catálogos en línea de acceso público disponibles en entorno web de las bibliotecas universitarias y especializadas en Argentina y Brasil : diagnóstico de situación (2007) 0.01 
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    Source
    ¬La interdisciplinariedad y la transdisciplinariedad en la organización del conocimiento científico : actas del VIII Congreso ISKO-España, León, 18, 19 y 20 de Abril de 2007 : Interdisciplinarity and transdisciplinarity in the organization of scientific knowledge. Ed.: B. Rodriguez Bravo u. M.L Alvite Diez
  5. Harmsen, B.: Adding value to Web-OPACs (2000) 0.01 
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    Date
    28. 3.2002 10:08:29
    Language
    e
  6. Butterfield, K.: Online Public Access Catalogs (OPACs) (2009) 0.01 
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    Content
    Digital unter: http://dx.doi.org/10.1081/E-ELIS3-120045435. Vgl.: http://www.tandfonline.com/doi/book/10.1081/E-ELIS3.
    Language
    e
  7. Niggemann, E.: Wer suchet, der findet? : Verbesserung der inhaltlichen Suchmöglichkeiten im Informationssystem Der Deutschen Bibliothek (2006) 0.01 
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    Abstract
    Elektronische Bibliothekskataloge und Bibliografien haben ihr Monopol bei der Suche nach Büchern, Aufsätzen, musikalischen Werken u. a. verloren. Globale Suchmaschinen sind starke Konkurrenten, und Bibliotheken müssen heute so planen, dass ihre Dienstleistungen auch morgen noch interessant sind. Die Deutsche Bibliothek (DDB) wird ihre traditionelle Katalogrecherche zu einem globalen, netzbasierten Informationssystem erweitern, das die Vorteile der neutralen, qualitätsbasierten Katalogsuche mit den Vorteilen moderner Suchmaschinen zu verbinden sucht. Dieser Beitrag beschäftigt sich mit der Verbesserung der inhaltlichen Suchmöglichkeiten im Informationssystem Der Deutschen Bibliothek. Weitere Entwicklungsstränge sollen nur kurz im Ausblick angerissen werden.
  8. Jansen, B.J.; Pooch , U.: ¬A review of Web searching studies and a framework for future research (2001) 0.01 
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    Language
    e
  9. Mann, T.: ¬The changing nature of the catalog and its integration with other discovery tools. Final report. March 17, 2006. Prepared for the Library of Congress by Karen Calhoun : A critical review (2006) 0.01 
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    Content
    Stellungnahme zu: Calhoun, K.: The changing nature of the catalog and its integration with other discovery tools.
    Language
    e
  10. LaBarre, K.: Faceted navigation and browsing features in new OPACs : a more robust solution to problems of information seekers? (2007) 0.01 
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    Language
    e
  11. Rädler, K.: Kataloganreicherung mit digitalen Inhaltsverzeichnissen eröffnet neue Geschäftsfelder : Erfahrungen aus der Vorarlberger Landesbibliothek (2008) 0.01 
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    Date
    22. 6.2008 17:14:24
  12. Braschoß, K.; Hansmann, S.; Hesse, T.; Joosten-Wilke, U.; Ristau, R.; Rusch, B.; Taylor, V.: Indexierung von Online-Katalogen : Ein gemeinsames Konzept der ALEPH-Anwender in Berlin (2004) 0.01 
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  13. Greifeneder, E.: Hilfe auf allen Ebenen : ein Beitrag zur Forschung über Online-Hilfen in OPACs (2008) 0.01 
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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.
  14. Graham, R.Y.: Subject no-hits in an academic library online catalog : an exploration of two potential ameliorations (2004) 0.01 
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    Language
    e
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  15. Kramski, H.-W.; Schmidgall, K.: Kallias: Katalog des Literaturarchivs Marbach : Verbundzugang mit einem autonomen Lokalsystem (2003) 0.01 
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  16. Markey, K.: Twenty-five years of end-user searching : part 1: research findings (2007) 0.01 
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  17. Markey, K.: Twenty-five years of end-user searching : part 2: future research directions (2007) 0.01 
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  18. Calhoun, K.: ¬The changing nature of the catalog and its integration with other discovery tools : Prepared for the Library of Congress (2006) 0.01 
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    Abstract
    The destabilizing influences of the Web, widespread ownership of personal computers, and rising computer literacy have created an era of discontinuous change in research libraries a time when the cumulated assets of the past do not guarantee future success. The library catalog is such an asset. Today, a large and growing number of students and scholars routinely bypass library catalogs in favor of other discovery tools, and the catalog represents a shrinking proportion of the universe of scholarly information. The catalog is in decline, its processes and structures are unsustainable, and change needs to be swift. At the same time, books and serials are not dead, and they are not yet digital. Notwithstanding widespread expansion of digitization projects, ubiquitous e-journals, and a market that seems poised to move to e-books, the role of catalog records in discovery and retrieval of the world's library collections seems likely to continue for at least a couple of decades and probably longer. This report, commissioned by the Library of Congress (LC), offers an analysis of the current situation, options for revitalizing research library catalogs, a feasibility assessment, a vision for change, and a blueprint for action. Library decision makers are the primary audience for this report, whose aim is to elicit support, dialogue, collaboration, and movement toward solutions. Readers from the business community, particularly those that directly serve libraries, may find the report helpful for defining research and development efforts. The same is true for readers from membership organizations such as OCLC Online Computer Library Center, the Research Libraries Group, the Association for Research Libraries, the Council on Library and Information Resources, the Coalition for Networked Information, and the Digital Library Federation. Library managers and practitioners from all functional groups are likely to take an interest in the interview findings and in specific actions laid out in the blueprint.
    Language
    e
  19. 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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    Date
    22. 2.2009 19:40:38
  20. Brintzinger, K.-R.: Abstracts im Verbund : Von der bibliothekarischen zur nutzerorientierten Erschließung. ein Versuch des Juristischen Seminars der Universität Tübingen (2003) 0.01 
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    Content
    "Der etwas provokante Titel soll keineswegs eine Dichotomie zwischen bibliothekarischer und nutzerorientierter Erschließung implizieren, sondern zwei Fragen stellen: Was suchen Nutzer in Bibliotheken? Was wollen Nutzer wissen? Die Antwort darauf wird immer heißen: Nutzer suchen nach Inhalten und wollen Informationen über Inhalte. Formale Aspekte, die unter bibliothekarischen Gesichtspunkten durchaus bedeutend sind, spielen für den Nutzer keine große Rolle, Schlagworte als Instrumente der verbalen Sacherschließung beschreiben Inhalte häufig unzureichend und sind für Nutzer vielfach unverständlich. Die bunten Kataloge der Internet-Buchhändler stellen zunehmend einen Kontrast, aber auch eine Konkurrenz zu unseren OPACs dar. Wer in diesen Katalogen recherchiert, findet zwar meist nur eine rudimentäre und natürlich bibliothekarischen Kriterien nicht entsprechende Titelbeschreibung, dafür jedoch regelmäßig zusätzliche Informationen wie Abstracts oder Verlagsinformationen, Rezensionen, Abbildungen, Textproben. Sollen wir uns nun den Katalog von Amazon.de (und seiner Konkurrenten) zum Vorbild nehmen? Wir meinen ja und erfassen daher Abstracts und andere Inhaltsinformationen, die wir mit unseren Titelaufnahmen im Verbund verlinken. Wir sehen darin eine Fortsetzung unseres seit einigen Jahren verfolgten Zieles, die traditionelle Sach- und Formalerschließung um neue Komponenten zu erweitern. Seit 1997 beteiligen wir uns an der kooperativen Aufsatzerschließung, insbesondere durch die Katalogisierung von Festschriftenaufsätzen. Aufsätze in fortlaufenden Sammelwerken katalogisieren wir nur ausnahmsweise, jedoch weisen wir von den Verlagen im Internet angebotene Inhaltsinformationen über Zeitschriften (Inhaltsverzeichnisse, Abstracts, Volltexte) auf der lokalen Ebene nach. Mit unserem Versuch, Abstracts in eine Datenbank des Verbundes einzustellen, haben wir Ende 2000 begonnen. Von ausgewählten Monographien werden Klappentexte, Verlagsinformationen und Abstracts erfasst und mit der Titelaufnahme verlinkt. Unser bisheriges Verfahren ist handgestrickt - hat aber den Vorteil, dass es ohne zusätzliche Technik auskommt und unmittelbar umsetzbar ist: In einem ersten Schritt werden Klappentexte und Inhaltsinformationen von geeigneten Werken ausgewählt. Die Auswahl berücksichtigt sowohl die Bedeutung des Buches wie Umfang und Qualität der Inhaltsinformationen. Das Erfassen der Texte geschieht durch Einscannen oder - wenn dies bei kurzen Texten effizienter ist - durch Abschreiben. Bei einzelnen Verlagen ist es möglich, die Texte direkt von den Webseiten des Verlages per copy-and-paste zu übernehmen. Die Doktoranden unserer Fakultät bitten wir um die Lieferung des Abstracts als Textdatei. Die durch Einscannen, Abschreiben oder Kopieren erzeugte Textdatei wird im nächsten Schritt in eine vom BSZ entwickelte Muster-HTML-Datei kopiert, konvertiert und mit der SWBIdentnummer versehen. Anschließend senden wir diese Datei per E-Mail an den Verbund. Der Verbund stellt unsere Dateien in den BSZ-Medienserver (http://www.bszbw.de/diglib/medserv/metainfhtml) ein, auf dem z.B. auch die ebenfalls mit den VerbundTiteldaten verlinkten IfB- und ekz-Rezensionen gespeichert werden."

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