Search (41 results, page 1 of 3)

  • × theme_ss:"OPAC"
  • × year_i:[2000 TO 2010}
  1. Oberhauser, O.: Implementierung und Parametrisierung klassifikatorischer Recherchekomponenten im OPAC (2005) 0.00 
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    Abstract
    Das in den letzten Jahren wiedererwachte Interesse an der klassifikatorischen Erschließung und Recherche hat sich allem Anschein nach noch nicht ausreichend bis zu den Herstellern integrierter Bibliothekssysteme herumgesprochen. Wie wäre es sonst zu erklären, dass im OPAC-Modul eines führenden Systems wie Aleph 500 so gut wie keine Features für klassifikationsbasierte Recherchen zu erblicken sind? Tatsächlich finden wir heute einen im Vergleich zum einstigen System Bibos kaum veränderten Zustand vor: Notationen eines oder mehrerer Klassifikationssysteme können in einer durch MAB dafür bestimmten Kategorie (700, nebst Indikatoren) katalogisiert und dann recherchiert bzw. angezeigt werden. Doch welcher Benutzer weiß schon, was diese Notationen im einzelnen bedeuten? Wer macht sich die Mühe, dies selbst herauszufinden, um dann danach zu recherchieren? Hier liegt im wesentlich dasselbe Problem vor, das schon dem systematischen Zettelkatalog anhaftete und ihn zu einem zwar mühevoll erstellten, aber wenig genutzten Rechercheinstrument machte, das nur dann (zwangsläufig) angenommen wurde, wenn ein verbaler Sachkatalog fehlte. Nun könnte eingewandt werden, dass im Vergleich zu früher unter Aleph 500 wenigstens das Aufblättern von Indizes möglich sei, sodass im OPAC ein Index für die vergebenen Notationen angeboten werden kann (bzw. mehrere solche Indizes bei Verwendung von mehr als nur einem Klassifikationssystem). Gewiss, doch was bringt dem Uneingeweihten das Aufblättern des Notationsindex - außer einer alphabetischen Liste von kryptischen Codes? Weiter könnte man einwenden, dass es im Aleph-500-OPAC die so genannten Suchdienste ("services") gibt, mithilfe derer von bestimmten Elementen einer Vollanzeige hypertextuell weiternavigiert werden kann. Richtig, doch damit kann man bloß wiederum den Index aufblättern oder alle anderen Werke anzeigen lassen, die dieselbe Notationen - also einen Code, dessen Bedeutung meist unbekannt ist - aufweisen. Wie populär mag dieses Feature beim Publikum wohl sein? Ein anderer Einwand wäre der Hinweis auf das inzwischen vom Hersteller angebotene Thesaurus-Modul, das vermutlich auch für Klassifikationssysteme eingesetzt werden könnte. Doch wie viele Bibliotheken unseres Verbundes waren bisher bereit, für dieses Modul, das man eigentlich als Bestandteil des Basissystems erwarten könnte, gesondert zu bezahlen? Schließlich mag man noch einwenden, dass es im Gegensatz zur Bibos-Zeit nun die Möglichkeit gibt, Systematiken und Klassifikationen als Normdateien zu implementieren und diese beim Retrieval für verbale Einstiege in die klassifikatorische Recherche oder zumindest für die Veranschaulichung der Klassenbenennungen in der Vollanzeige zu nutzen. Korrekt - dies ist möglich und wurde sogar einst für die MSC (Mathematics Subject Classification, auch bekannt als "AMS-Klassifikation") versucht. Dieses Projekt, das noch unter der Systemversion 11.5 begonnen wurde, geriet jedoch nach einiger Zeit ins Stocken und fand bedauerlicherweise nie seinen Weg in die folgende Version (14.2). Mag auch zu hoffen sein, dass es unter der neuen Version 16 wieder weitergeführt werden kann, so weist dieses Beispiel doch auf die grundsätzliche Problematik des Normdatei-Ansatzes (zusätzlicher Aufwand, Kontinuität) hin. Zudem lohnt sich die Implementierung einer eigenen Normdatei 4 wohl nur bei einem größeren bzw. komplexen Klassifikationssystem, wogegen man im Falle kleinerer Systematiken kaum daran denken würde.
    Source
    Mitteilungen der Vereinigung Österreichischer Bibliothekarinnen und Bibliothekare. 58(2005) H.1, S.22-37
  2. Harmsen, B.: Adding value to Web-OPACs (2000) 0.00 
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    Date
    28. 3.2002 10:08:29
  3. Greifeneder, E.: Hilfe auf allen Ebenen : ein Beitrag zur Forschung über Online-Hilfen in OPACs (2008) 0.00 
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    Date
    22. 6.2008 13:29:15
  4. Long, C.E.: Improving subject searching in Web-based OPACs : evaluation of the problem and guidelines for design (2000) 0.00 
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    Abstract
    Online catalog users search predominately by subject, yet it is the most difficult search to perform and retrieves records only about one-half of the time. A new generation of OPACs (online public access catalogs) is on the horizon, the Web-based OPAC. Web-based OPACs allow users to access online catalogs through a WWW (World Wide Web) interface and have the potential to improve patrons' ability to search by subject. But will this potential be realized? This article proposes some basic guidelines that can be incorporated into Web-based OPAC interface design to help users perform subject searches more effectively, and evaluates how well Web-based OPACs currently in operation address the subject searching problem
  5. Archuby, C.G.: Interfaces se recuperacion para catalogos en linea con salidas ordenadas por probable relevancia (2000) 0.00 
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    Date
    29. 1.1996 18:23:13
    Source
    Ciencia da informacao. 29(2000) no.3, S.5-13
  6. Lewandowski, D.: How can library materials be ranked in the OPAC? (2009) 0.00 
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    Abstract
    Some Online Public Access Catalogues offer a ranking component. However, ranking there is merely text-based and is doomed to fail due to limited text in bibliographic data. The main assumption for the talk is that we are in a situation where the appropriate ranking factors for OPACs should be defined, while the implementation is no major problem. We must define what we want, and not so much focus on the technical work. Some deep thinking is necessary on the "perfect results set" and how we can achieve it through ranking. The talk presents a set of potential ranking factors and clustering possibilities for further discussion. A look at commercial Web search engines could provide us with ideas how ranking can be improved with additional factors. Search engines are way beyond pure text-based ranking and apply ranking factors in the groups like popularity, freshness, personalisation, etc. The talk describes the main factors used in search engines and how derivatives of these could be used for libraries' purposes. The goal of ranking is to provide the user with the best-suitable results on top of the results list. How can this goal be achieved with the library catalogue and also concerning the library's different collections and databases? The assumption is that ranking of such materials is a complex problem and is yet nowhere near solved. Libraries should focus on ranking to improve user experience.
  7. Klauß, H.: ¬Die Verknüpfung von (lokalem) Bibliothekskatalog und Internet-Ressourcen (2001) 0.00 
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    Date
    29. 9.2001 11:37:12
  8. Oberhauser, O.: Teil 2: Ergebnisse der Befragung : Web-Umfrage zur Benutzung von Card-Image Online-Katalogen (2002) 0.00 
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    Date
    29. 9.2002 14:56:21
  9. Schneider, R.: OPACs, Benutzer und das Web (2009) 0.00 
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    Date
    22. 2.2009 18:50:43
  10. Marchitelli, A.; Piazzini, T.: OPAC, SOPAC e social networking : cataloghi di biblioteca 2.0? (2008) 0.00 
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    Date
    29. 1.1996 17:18:10
  11. Hubrich, J.: Aufwand zur Sicherstellung der Qualität und Möglichkeiten des Nutzens im OPAC (2005) 0.00 
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    Source
    Dialog mit Bibliotheken. 17(2005) H.2, S.19-29
  12. Wien, C.: Sample sizes and composition : their effect on recall and precision in IR experiments with OPACs (2000) 0.00 
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    Source
    Cataloging and classification quarterly. 29(2000) no.4, S.73-86
  13. Horn, M.E.: "Garbage" in, "refuse and refuse disposal" out : making the most of the subject authority file in the OPAC (2002) 0.00 
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    Date
    10. 9.2000 17:38:22
  14. Beccaria, M.; Scott, D.: Fac-Back-OPAC : an open source interface to your library system (2007) 0.00 
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    Date
    17. 8.2008 11:22:47
  15. Moulaison, H.L.: OPAC queries at a medium-sized academic library : a transaction log analysis (2008) 0.00 
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    Date
    10. 9.2000 17:38:22
  16. Zumer, M.; Riesthuis, G.J.A.: Consequences of implementing FRBR : are we ready to open pandora's box? (2002) 0.00 
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    Source
    Knowledge organization. 29(2002) no.2, S.78-86
  17. Hubrich, J.: ¬Die Schlagwortrecherche in deutschsprachigen OPACs : Typen der Schlagwortsuche und der Einsatz der Schlagwortnormdatei (SWD) dargelegt unter Rückgriff auf eine empirische Untersuchung (2005) 0.00 
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    Date
    17. 7.2005 10:29:46
  18. Ramesh Babu, B.; Tamizhchelvan, M.: ¬An investigation into the features of OPACs in Tamil Nadu (India) (2003) 0.00 
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    Date
    10.12.2005 11:29:06
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