Search (338 results, page 1 of 17)

  • × theme_ss:"OPAC"
  1. Sugano, I.: ¬The study of criteria for evaluating OPACs as information retrieval systems (1996) 0.06 
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    Abstract
    Most of the criteria proposed to date for the evaluation of OPACs focus on evaluation of their retrieval function. Argues that the storage function is more important because the quality of information retrieval systems is dependent on the quality of stored information as well as the description and depth of indexing of stored information. States that OPACs should therefore be evaluated from the perspectives of both storage and retrieval functions. Examines 4 studies on criteria for evaluating OPACs and suggests a new evaluation framework based on the work of C.R. Hildreth
    Date
    29. 7.1998 10:51:23
  2. Fieldhouse, M.; Hancock-Beaulieu, M.: ¬The design of a graphical user interface for a highly interactive information retrieval system (1996) 0.06 
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    Abstract
    Reports on the design of a GUI for the Okapi 'best match' retrieval system developed at the Centre for Interactive Systems Research, City University, UK, for online library catalogues. The X-Windows interface includes an interactive query expansion (IQE) facilty which involves the user in the selection of query terms to reformulate a search. Presents the design rationale, based on a game board metaphor, and describes the features of each of the stages of the search interaction. Reports on the early operational field trial and discusses relevant evaluation issues and objectives
    Source
    Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  3. Pejtersen, A.M.: Implications of users' value perception for the design of a bibliographic retrieval system (1986) 0.05 
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    Date
    5. 8.2006 10:16:29
  4. Archuby, C.G.: Interfaces se recuperacion para catalogos en linea con salidas ordenadas por probable relevancia (2000) 0.05 
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    Date
    29. 1.1996 18:23:13
    Footnote
    Übers. d. Titels: Interface for retrieval from online access catalogues with ranked results according to their relevance
    Source
    Ciencia da informacao. 29(2000) no.3, S.5-13
  5. Wien, C.: Sample sizes and composition : their effect on recall and precision in IR experiments with OPACs (2000) 0.05 
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    Abstract
    This article discusses how samples of records for laboratory IR experiments on OPACs can be constructed so that results obtained from different experiments can be compared. The literature on laboratory IR experiments seems to indicate that the retrieval effectiveness (recall and precision) is affected by the way the samples of records for such experiments are generated. Especially the amount of records and the subject area coverage of the records seems to affect the retrieval effectiveness. This article contains suggestions for the construction of samples for laboratory IR experiments on OPACs and demonstrates that the retrieval effectiveness is affected by different sample size and composition.
    Source
    Cataloging and classification quarterly. 29(2000) no.4, S.73-86
  6. Buckland, M.K.: OASIS: a front-end for prototyping catalog enhancements (1992) 0.05 
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    Abstract
    By the mid 1980s online bibliographic systems retrieved excessively large sets. Conversely, with standard Boolean systems, searches retrieved commonly nothing or too few records. In Nov. 92, 32% of searches yielded nothing from a retrieval set averaging 98. Offers solutions to these problems using MELVYL as a case study. Examines how non topical data such as date, language and location of document can improve topical searches. Explains OASIS and front end phototyping. Discusses adaptive retrieval, strategic commands, expanded retrieval and developments of OASIS. Covers aggregation of filtered sets, related terms, automatic progressive truncation, the SUMMARIZE LIBRARIES command, filing and filtering and collection analysis
    Source
    Library hi tech. 10(1992) no.4, S.7-22
  7. Sharma, A.: ¬The Z39.50 information retrieval protocol (1998) 0.04 
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    Abstract
    Reports results of the work of a new member of the ELINOR project team to review the development taking place in Z39.50 networked information retrieval protocol with a view to bringing the University's electronic library pilot systems, including ELINOR and the online catalogue into a single, unified system. Focuses particularly on the WWW client server environment
    Series
    British Library Research and Innovation Centre (BLRIC) report; 22
  8. Sellers, M.: Cataloging decision consequences : accessing table of contents in the online catalog (1994) 0.04 
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    Abstract
    Explores the retrieval and user issues related to the impact of including table of contents notes as a searchable field in online catalogues. Includes a review of evaluation criteria, a summary of previously published studies, and a conceptual model which addresses some of the disadvantages of the searchable MARC field
    Date
    25.10.1995 21:10:29
  9. Sullenger, P.: ¬A serials transaction log analysis (1997) 0.04 
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    Abstract
    A transaction log analysis of searches for serials looks at how users go about their searching (by title, subject, or keyword) and what problems they encounter, and then examines the results of those searches. Explores ways in which serials records could be improved to enhance retrieval
    Date
    29. 7.1998 10:54:49
  10. Walker, S.: ¬The Okapi online catalogue research projects (1989) 0.04 
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    Date
    16. 8.1998 11:22:08
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.424-435.
  11. Hauer, M.; Diedrichs, R.: Kataloganreicherung in Europa : Bibliotheken als Information-Retrieval-Systeme in einer digitalen Welt (2010) 0.04 
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    Abstract
    Bibliotheken sind nicht chaotische Sammlungen von Medien, sondern werden stets als Information-Retrieval-Systeme implementiert, denn das Wiederfinden bei exakten und vor allem bei vagen Anfragen ist von Anfang an das Sammlungsziel. Niemand kennt zum Zeitpunkt der Sammlung die Fragestellung, die einen zukünftigen Benutzer zu diesem Medium führen wird. Die Art der Sammlungsorganisation bestimmt in hohem Maße die zukünftig mögliche Antwortmenge und deren informatorische Qualität. Der Siegeszug der digitalen Information-Retrieval-Systeme im Internet hat in den letzten zehn Jahren Erwartungen und Märkte geschaffen, die weder Karteikarten, noch deren digitales Ebenbild, die heutigen Bibliotheksmanagement-Systeme befriedigen können. Es genügt nicht mehr, dass Google und andere kostenlos das aufsammeln und nachweisen, was im Internet frei zugänglich ist. Alte, noch »marktfähige« Inhalte werden neu aufbereitet, mit neuen Inhalten kombiniert, um neue Geschäftsfelder zu schaffen. Es geht um Verdrängung und Neuverteilung, und die älteren Inhalte der Bibliotheken sind meist noch hinreichend »marktfähig«.
    Date
    3. 6.2010 10:29:09
  12. Jäger-Dengler-Harles, I.: Informationsvisualisierung und Retrieval im Fokus der Infromationspraxis (2013) 0.04 
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    Abstract
    Methoden und Techniken der Informationsvisualisierung werden seit ungefähr zwanzig Jahren im Bereich der Informationssuche eingesetzt. In dieser Literaturstudie werden ausgewählte Visualisierungsanwendungen der letzten Jahre vorgestellt. Sie betreffen zum einen den Retrievalprozess, das Boolesche Retrieval, die facettierte Suche, Dokumentbeziehungen, die Zufallssuche und Ergebnisanzeige, zum anderen spezielle Anwendungen wie die kartenbasierte und adaptive Visualisierung, Zitationsnetzwerke und Wissensordnungen. Die Einsatzszenarien für Applikationen der Informationsvisualisierung sind vielfältig. Sie reichen von mobilen kleinformatigen Anwendungen bis zu großformatigen Darstellungen auf hochauflösenden Bildschirmen, von integrativen Arbeitsplätzen für den einzelnen Nutzer bis zur Nutzung interaktiver Oberflächen für das kollaborative Retrieval. Das Konzept der Blended Library wird vorgestellt. Die Übertragbarkeit von Visualisierungsanwendungen auf Bibliothekskataloge wird im Hinblick auf die Nutzung des Kataloginputs und des Angebots an Sucheinstiegen geprüft. Perspektivische Überlegungen zu zukünftigen Entwicklungsschritten von Bibliothekskatalogen sowie zum Einfluss von Visualisierungsanwendungen auf die Informationspraxis werden angestellt.
    Date
    4. 2.2015 9:22:39
  13. Schweikl, G.: ¬Die Pilotierung des SISIS-OPAC-ONL V 1.0 an der Universitätsbibliothek Regensburg (1994) 0.03 
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    Abstract
    Within the SOKRATES project Bavarian state, university and regional libraries are being equipped with locally automated systems. Regensburg university library has piloted the SISIS-OPAC-ONL version 1.0, adapted from the SINIX-based software SISIS-SE, with a machine readable stock of 1,66 million titles. OPAC-ONL offers 3 retrieval functions of different grades. Tests have been approved by Bavarian state libraries provided that certain faults are rectified statewide use of the OPAC should follow
    Source
    Bibliotheksforum Bayern. 22(1994) H.3, S.358-376
  14. Boeckx, T.: Onderwerpontsluiting in de on-line publiekscatalogus (1986) 0.03 
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    Theme
    Verbale Doksprachen im Online-Retrieval
    Klassifikationssysteme im Online-Retrieval
  15. Pedretti, G.: ¬L'¬uso dei cataloghi in biblioteca (1996) 0.03 
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    Abstract
    Reports an empirical study at the Queriniana Civic Library, Brescia, of interaction betwee researchers and printed catalogues during bibliographic data retrieval. The study sought to ascertain frequency of catalogue use; research success rate and time taken; and to identify user profiles. Data were obtained by a mixture of questionnaires, interviews and direct observation. Findings showed that 64% of the catalogue users were female; 70% were aged 19-30; 65% were university students or had good school grades; and hardly any were working class. University students preferred keyword access. 50% or all searches were successful. Most search failures related to subject catalogues, which usually required more time. Provides statistics on time spent in research
    Date
    29. 1.1996 17:18:10
  16. Hubrich, J.: Aufwand zur Sicherstellung der Qualität und Möglichkeiten des Nutzens im OPAC (2005) 0.03 
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    Abstract
    »Sacherschließung - können wir uns die noch leisten?« Angesichts des zunehmend geringeren Gesamtetats, der den Bibliotheken zur Verfügung steht, drängt sich diese Frage nahezu auf. Sacherschließung ist teuer und für das moderne Bibliothekswesen nur dann noch tragbar, wenn der Mitteleinsatz in einem angemessenen Verhältnis zum Ergebnis steht, das sich in der Leistungsfähigkeit des Produkts widerspiegelt. Im deutschsprachigen Raum trägt die SWD wesentlich zu einer effektiveren Sacherschließungsarbeit bei. Ihre Pflege und Weiterentwicklung ist jedoch mit einem enormen Aufwand gekoppelt, der nur mit einer entsprechenden Nutzung der Daten für das thematische Retrieval in den OPACs gerechtfertigt werden kann.
    Source
    Dialog mit Bibliotheken. 17(2005) H.2, S.19-29
  17. Pu, H.-T.: Exploration of personalized information service for OPAC (1997) 0.03 
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    Abstract
    Library OPACs have long been the gateways between users and information. They present to users the achievements of library automation, and are the most widely available automated retrieval systems and the first that many user encounter. Current trends in OPAC design are toward a user oriented, individual information service which can meet the different needs of users with a variety of background and interests. Compared with the rather inactive, short term and general information service of conventional systems, this type of system focuses on active, long term and personalized service. Proposes a framework for the design of such an OPAC and discusses some recent developments in personalized information service
    Date
    4. 8.1998 19:36:22
  18. Walker, S.; Jones, R.M.: Improving subject retrieval in online catalogues : T.1: Stemming, automatic spelling correction and cross-reference tables (1987) 0.03 
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    Theme
    Verbale Doksprachen im Online-Retrieval
  19. Hubrich, J.: ¬Die Schlagwortrecherche in deutschsprachigen OPACs : Typen der Schlagwortsuche und der Einsatz der Schlagwortnormdatei (SWD) dargelegt unter Rückgriff auf eine empirische Untersuchung (2005) 0.03 
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    Abstract
    Schlagwortsuchen sind heutzutage fester Bestandteil vieler Online-Kataloge. Durch die Verknüpfung von Titeldaten mit dokumentspezifischen Schlagwörtern aus der SWD wird ein thematischer Zugang zu den Medien eines Verbundes bzw. einer Bibliothek ermöglicht. Der SWD-Datensatz bietet neben den Ansetzungsformen, die für die Indexate genutzt werden, jedoch noch eine Reihe weiterer Informationen, die, an der richtigen Stelle im Online-Katalog implementiert, das Retrieval seitens des Benutzers optimieren können. Untersucht wurden die Online-Kataloge der großen deutschen Bibliotheksverbünde, des österreichischen Bibliothekenverbunds sowie 106 weiterer OPACs von vorwiegend wissenschaftlichen Bibliotheken. Es wurde betrachtet, welche Suchfeatures für die Schlagwortrecherche zur Verfügung gestellt werden, wie sie gestaltet sind und inwieweit das SWD-Datenmaterial genutzt wird. Dabei zeigte sich, dass zurzeit drei Typen von Schlagwortsuchen verbreitet sind: - die Indexsuche (mehrstufige Schlagwort- bzw. Schlagwortkettensuche) - die einstufige Schlagwort- bzw. Schlagwortkettensuche sowie - die weiterführende Schlagwort- bzw. Schlagwortkettensuche von einer Treffer- bzw. Titelvollanzeige aus.
    Date
    17. 7.2005 10:29:46
  20. Poo, D.C.C.; Khoo, C.S.G.: Online Catalog Subject Searching (2009) 0.03 
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    Abstract
    The Online Public Access Catalog (OPAC) is an information retrieval system characterized by short bibliographic records, mainly of books, journals, and audiovisual materials available in a particular library. This, coupled with a Boolean search interface and a heterogeneous user population with diverse needs, presents special problems for subject searching by end users. To perform effective subject searching in the OPAC system requires a wide range of knowledge and skills. Various approaches to improving the OPAC design for subject searching have been proposed and are reviewed in this entry. The trend toward Web-based OPAC interfaces and the developments in Internet and digital library technologies present fresh opportunities for enhancing the effectiveness of the OPAC system for subject searching.
    Date
    27. 8.2011 14:24:29

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