Search (68 results, page 1 of 4)

  • × language_ss:"e"
  • × theme_ss:"OPAC"
  • × type_ss:"a"
  • × year_i:[2000 TO 2010}
  1. Voß, J.; Hellmich, J.: »Am Kerngeschäft der Bibliothekare kann sich plötzlich jeder beteiligen« (2007) 0.02 
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    Abstract
    Der Wikipedia-Experte Jakob Voß plädiert dafür, Opacs mit Inhalten aus Wikis, Weblogs und Bookmarking-Diensten anzureichern Auf dem Leipziger Bibliothekskongress hat Jakob Voß einen Vortrag zum Thema »Soziale Software - Hype oder Verheißung?« gehalten - und damit eine der bestbesuchten Veranstaltungen eingeleitet. Der 28-Jährige hat Informatik, Bibliothekswissenschaft und Philosophie in Chemnitz und Berlin studiert und arbeitet als Entwickler beim Gemeinsamen Bibliotheksverbund GBV in Göttingen. Seit 2002 gehörter zum Vorstand von Wikimedia Deutschland, einem »Verein zur Förderung des freien Wissens«, dessen prominentestes Förderprojekt die Web-Enzyklopädie Wikipedia ist. BuB-Redakteurin Julia Hellmich hat Jakob Voß in Leipzig interviewt.
  2. Hubrich, J.: Aufwand zur Sicherstellung der Qualität und Möglichkeiten des Nutzens im OPAC (2005) 0.01 
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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.
  3. Kaiser, S.: Retrokonversion des Quartkatalogs abgeschlossen (2006) 0.01 
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    Abstract
    Für die Retrokonversion des nach allgemeiner Einschätzung wichtigsten Katalogbestandes in Bayern, der noch nicht online verfügbar ist - des Quartkatalogs der Bayerischen Staatsbibliothek (BSB) -, sollte die Zeit des Systemwechsels vom noch großrechnerbasierten BVB-KAT auf ein neues Bibliothekssystem genutzt werden.
    Content
    "Angesichts des Alters (18401952), der Menge (2,3 Millionen Katalogblätter im Quartformat, daher der Name Quartkatalog) und der Schwierigkeit der Vorlagen (über neunzig Prozent handschriftlich) bot es sich für die BSB an, längere Zeit zu prüfen, welches Retrokonversionsverfahren für das geplante Vorhaben am besten geeignet ist unter besonderer Berücksichtigung von Projektdauer, Kosten und unverzichtbarer hoher Qualität der bei der Retrokonversion erstellten Titeldaten. Sorgfältige Vorarbeiten hatten ein Verhältnis von 65 Prozent Zutragungen zu vorhandenen BVB Titeldatensätzen und 35 Prozent Neuaufnahmen prognostiziert. Als entscheidend für den Konversionserfolg wurde daher eine sehr hohe Genauigkeit bei der Entscheidung Neuaufnahme/ Zutragung angesehen, eine hohe Nachvollziehbarkeit der Rechercheentscheidungen sowie die Vermeidung von Dubletten in der Verbunddatenbank. Vor diesem Hintergrund fiel die Entscheidung zu einem Retrokonversionsverfahren unter Ausspeicherung der vorhandenen BVB-Daten, darunter die von der Deutschen Bücherei Leipzig und der Staatsbibliothek Preußischer Kulturbesitz übernommenen Altdaten, mit besonderem Fokus auf die Qualitätssicherung durch den auszuwählenden Dienstleister. In einer europaweiten Ausschreibung wurde im Oktober 2002 der Anbieter Satz-Rechen-Zentrum (SRZ Berlin) ausgewählt, der in den Jahren 1996-1997 bereits die Retrokonversion des IFK der BSB (2,2 Millionen Karten im internationalen Format) erfolgreich bewältigt hatte. Von Dezember 2002 bis Juli 2003 wurden die Katalogschränke sukzessive nach Berlin transportiert, um an zwei für diesen Zweck speziell gebauten Durchzugsscannern 2,3 Millionen Quartblätter mit Vorder- und Rückseite in 256 Graustufen zu digitalisieren. Die insgesamt 4,6 Millionen Bilder (images) umfassen ein Datenvolumen von 221 GByte."
  4. Horn, M.E.: "Garbage" in, "refuse and refuse disposal" out : making the most of the subject authority file in the OPAC (2002) 0.01 
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    Abstract
    Subject access in the OPAC, as discussed in this article, is predicated on two different kinds of searching: subject (authority, alphabetic, or controlled vocabulary searching) or keyword (uncontrolled, free text, natural language vocabulary). The literature has focused on demonstrating that both approaches are needed, but very few authors address the need to integrate keyword into authority searching. The article discusses this difference and compares, with a query on the term garbage, search results in two online catalogs, one that performs keyword searches through the authority file and one where only bibliographic records are included in keyword searches.
    Date
    10. 9.2000 17:38:22
  5. Beccaria, M.; Scott, D.: Fac-Back-OPAC : an open source interface to your library system (2007) 0.01 
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    Abstract
    Fac-Back-OPAC is a faceted back­ up OPAC. This advanced catalog offers features that compare favorably with the traditional catalogs for today's library systems. Fac-Back-OPAC represents the convergence of two prominent trends in library tools: the decoupling of discovery tools from the traditional integrated library system and the use of readily available open source components to rapidly produce leading-edge technology for meeting patron and library needs. Built on code that was originally developed by Casey Durfee in February 2007, Fac-Back-OPAC is available for no cost under an open source license to any library that wants to offer an advanced search interface or a backup catalog for its patrons.
    Date
    17. 8.2008 11:22:47
    Source
    Computers in libraries. 27(2007) no.9, S.6-
  6. Moulaison, H.L.: OPAC queries at a medium-sized academic library : a transaction log analysis (2008) 0.01 
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    Abstract
    Patron queries at a four-year comprehensive college's online public access catalog were examined via transaction logs from March 2007. Three representative days were isolated for a more detailed examination of search characteristics. The results show that library users employed an average of one to three terms in a search, did not use Boolean operators, and made use of limits one-tenth of the time. Failed queries remained problematic, as a full one-third of searches resulted in zero hits. Implications and recommendations for improvements in the online public access catalog are discussed.
    Date
    10. 9.2000 17:38:22
  7. Lam, V.-T.: Enhancing subject access to monographs in Online Public Access Catalogs : table of contents added to bibliographic records (2000) 0.01 
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    Abstract
    Subject access to monographs through online public access catalogs (OPACs) has always been a major concern for large research and/or academic libraries. Academic library practice of providing subject access to monographs has proven inadequate, especially in the case of composite works. Many techniques have been proposed to enhance subject treatment of monographs in OPACs. This article briefly reviews these efforts in the past and presents the case of adding Tables of Contents as one of the Most useful and probably also one of the Most costeffective ways of improving subject access to Monographs in an academic environment.
    Date
    22. 9.1997 19:16:05
    Source
    Saving the time of the library user through subject access innovation: Papers in honor of Pauline Atherton Cochrane. Ed.: W.J. Wheeler
  8. Li, Y.-O.; Leung, S.W.: Computer cataloging of electronic Journals in unstable Aggregator Databases the Hong Kong Baptist University Library experience (2001) 0.01 
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    Abstract
    The growth and use of aggregator databases have presented libraries with both new opportunities for collection enhancement and new challenges of bibliographic control. How to integrate full-text electronic journal titles in unstable aggregator databases into a library's OPAC (Online Public Access Catalog) has been an especially taxing matter for libraries. This article describes the Hong Kong Baptist University Library's effort to integrate full-text electronic journal titles from three large, unstable aggregator databases into its INNOPAC-based OPAC. The library's electronic journal computer program (EJCOP) does this in a simple, direct, consistent, and accurate manner and addresses some of the issues elaborated in the January 2000 Final Report of the Task Group on Journals in Aggregator Databases of the Standing Committee on Automation of the Library of Congress Program for Cooperative Cataloging.
    Date
    10. 9.2000 17:38:22
  9. 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) 0.01 
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    Abstract
    One finding of the 2006 OCLC study of College Students' Perceptions of Libraries and Information Resources was that students expressed equal levels of trust in libraries and search engines when it came to meeting their information needs in a way that they felt was authoritative. Seeking to incorporate this insight into our own instructional methodology, Schaffer Library at Union College has attempted to engineer a shift from Google to Google Scholar among our student users by representing Scholar as a viable adjunct to the catalog and to snore traditional electronic resources. By attempting to engage student researchers on their own terms, we have discovered that most of them react enthusiastically to the revelation that the Google they think they know so well is, it turns out, a multifaceted resource that is capable of delivering the sort of scholarly information that will meet with their professors' approval. Specifically, this article focuses on the fact that many Google Scholar searches link hack to our own Web catalog where they identify useful book titles that direct OPAC keyword searches have missed.
    Date
    2.12.2007 19:39:22
    Footnote
    Beitrag eines Themenheftes "Profiles in digital information"
  10. Thomas, D.H.: ¬The effect of interface design on item selection in an online catalog (2001) 0.01 
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    Abstract
    The effect that content and layout of bibliographic displays had on the ability of end-users to process catalog information was tested using a 2 x 2 factorial experimental design. Participants were asked to perform two related tasks during the course of the experiment. In the first task, they were asked to select a set of items that they would examine further for a hypothetical paper they must write, using a simulated online catalog to make their assessments of relevance. In the second task, they were asked to examine 20 bibliographic records, decide whether they would choose to examine these items further on the shelf, and identify the data elements that they used to formulate their relevance decision. One group viewed bibliographic records on an interface similar to current online catalogs, one that used data labels and contained data elements commonly found. A second group viewed these records on an interface in which the labels had been removed, but the data elements were the same as those in the first. The third group viewed these records on a labeled display that included enhanced data elements on the brief record display. The final group viewed these records with the same brief record data elements as the third group, but with the labels removed, using ISBD and AACR2 punctuation standards. For the first task, participants using enhanced brief screen interfaces viewed more brief screens and fewer full screens than their counterparts. Screen durations for the second 10 screens were found to have dropped from those of the first 10 screens. Statistical analyses comparing demographic variables to the screen frequencies uncovered many significant differences. Participants using the enhanced-content interfaces made fewer selections from index and full screens, and more selections from brief screens. For the second task, participants who used enhanced-content interfaces were able to make some sort of relevance judgment more frequently than those who used standard-content interfaces.
    Date
    10. 9.2000 17:38:22
  11. 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."
    Source
    Electronic library. 22(2004) no.2, S.112-120
  12. Powell, C.K.: OPAC integration in the era of mass digitization : the MBooks experience (2008) 0.00 
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    Abstract
    Purpose - The purpose of this paper is to provide an overview of the OPAC integration in the University of Michigan's local implementation of materials digitized in the partnership with Google. Design/methodology/approach - The paper provides a discussion of different strategies used in integrating metadata with digital resources and presenting the digital objects to the user in the OPAC. Findings - The paper finds that methods that had served in smaller digitization projects require more automation and error reduction processes in an undertaking of this scale. Increased integration with the OPAC is one approach. Originality/value - Michigan is the first of the Google partners to mount their materials themselves and others involved in mass digitization may be interested in the experience.
    Footnote
    Beitrag in einem Themenheft "Information organization futures"
  13. Ramesh Babu, B.; Tamizhchelvan, M.: ¬An investigation into the features of OPACs in Tamil Nadu (India) (2003) 0.00 
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    Abstract
    Describes the results of a research survey conducted at the Department of Library and Information Science, University of Madras, Chennai, India which examines features provided in online public access catalogues (OPACs) in Tamil Nadu. OPACs are recent developments in libraries in India in general and Tamil Nadu in particular. A review of the literature reveals that only a few studies on OPACs in India have been conducted and there is no comprehensive study about the OPACs in Tamil Nadu. A sample of 50 libraries in Tamil Nadu were selected at random, out of which 36 responded. The analysis of the data represents the state-of-the-art of the libraries in the summer of 2002. The major findings of the survey reveal emerging trends in OPAC.
  14. Breeding, M.: ¬The birth of a new generation of library interfaces (2007) 0.00 
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    Abstract
    Over the last couple of years, there has been a surge of activity in the library automation arena directed toward improved user interfaces. As Breeding looks at the events and activities that have transpired over the last year or so, Breeding sees an incredible amount of progress in creating interfaces that help librarians compete better in an ever more crowded landscape of information providers. It's strategically important for libraries to have technologies in place that will optimize delivery of content and services in the context of today's Web. Breeding believes that failure to make progress in this area can foster a creep of irrelevancy as potential users increasingly rely on information resources provided by entities other than libraries.
    Source
    Computers in libraries. 27(2007) no.9, S.34-
  15. Hajdu Barát, A.: Usability and the user interfaces of classical information retrieval languages (2006) 0.00 
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    Abstract
    This paper examines some traditional information searching methods and their role in Hungarian OPACs. What challenges are there in the digital and online environment? How do users work with them and do they give users satisfactory results? What kinds of techniques are users employing? In this paper I examine the user interfaces of UDC, thesauri, subject headings etc. in the Hungarian library. The key question of the paper is whether a universal system or local solutions is the best approach for searching in the digital environment.
    Series
    Advances in knowledge organization; vol.10
  16. Gorman, M.: From card catalogues to WebPACs : celebrating cataloguing in the 20th century (2000) 0.00 
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    Source
    Conference on Bibliographic Control for the New Millennium held in Washington, DC at the Library of Congress, November 2000
  17. Marcin, S.; Morris, P.: OPAC: the next generation (2008) 0.00 
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    Abstract
    In terms of record transportability, WorldCat Local offers patrons an individual account with the ability to mark, create lists, add notes to items, share lists with others, export and print lists, export directly to RefWorks, cite items with built-in citation styles at the item level, link to items with built-in durable URLs, which is great for direct linking from webpages, course pages, etc.
    Source
    Computers in libraries. 28(2008) no.5, S.6-
  18. Sauperl, A.; Saye, J.D.: Have we made any progress? : catalogues of the future revisited (2009) 0.00 
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    Abstract
    Purpose - Library online public access catalogues (OPACs) are considered to be unattractive in comparison with popular internet sites. In 2000, the authors presented some suggestions on how library catalogues should change. Have librarians actually made their OPACs more user-friendly by adopting techniques and technologies already present in other information resources? This paper aims to address these issues. Design/methodology/approach - The characteristics of four OPACs, one online bookstore and two internet search engines are analyzed. The paper reviews some of the changes and directions suggested by researchers and adds some of authors own. All this is in the hope that library catalogues will survive "Google attack." Findings - Changes are identified in the information services studied over a seven-year period. Least development is found in library catalogues. Suggestions are made for library catalogues of the future. Research limitations/implications - A library catalogue, a web search engine and an internet bookstore cannot be compared directly because of differences in scope. But features from each could be fruitfully used in others. Practical implications - OPACs must be both attractive and useful. They should be at least as easy to use as their competitors. With the results of research as well as the knowledge librarians have many years, the profession should be able to develop better OPACs than we have today and regain lost ground in the "competition" for those with information needs. Originality/value - A comparison of OPAC features in 2000 and 2007, even if subjective, can provide a panoramic view of the development of the field.
  19. Schallier, W.: On the razor's edge : between local and overall needs in knowledge organization (2004) 0.00 
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    Abstract
    Recent projects in subject indexing and classification at K.U.Leuven University Library (Belgium) aim to give new Impulses to knowledge organization within the Institution. While in recent years a lot of attention was given, and with good reason, to the technical and administrative integration of e-sources, less energy was invested in organising the content of traditional and electronic collections. Nevertheless, presenting information sources in a content-structured way remains a core task of our University Library. This paper focuses an some experiments with subject search interfaces at K.U.Leuven University Library and situates them in a new policy for knowledge organization, which tries to find a balance between local and overall needs.
    Content
    1. One Institution, one catalogue, one solution? K.U.Leuven University Library has a decentralised structure consisting of several department libraries and one central library. It is part of LIBIS-net, which is the biggest network of academic libraries in Belgium. In this network, maintaining the balance between local and overall needs presents a constant challenge. Standards and overall rules in cataloguing are indispensable for permitting information exchange within and outside the network. On the other hand, overall solutions do not necessarily render the best service to the user of a specific library. This is especially the case for subject cataloguing. It is difficult, and perhaps unreasonable, to convince a department library to use a generally accepted thesaurus like LCSH, if the users are familiar with a local classification that is much better adapted to the collection. The DOBIS/LIBIS library system of K.U.Leuven offered a technical solution for the conflict between overall and local needs. The main part of the bibliographic description was stored an the overall level and was visible for the whole network. For subject cataloguing this was the case for UDC, LCSH and McSH. A UDC authority file was built containing UDC codes linked to descriptors in different languages (Dutch, English and French). The authority file was linked to the UDC codes used in the bibliographic descriptions. This permitted searching by either UDC codes or verbal terms. LCSH were regularly and automatically uploaded in the catalogue to enrich the bibliographic descriptions. Finally, our Library of Biomedical Sciences used McSH. Local information, like thesauri and classifications exclusively used in a specific library, were stored in local files ("local keywords") and could only be seen by that library (up to branch level). For many years, this local information posed no difficulties. 27.04% of all documents and 38.16% of those younger than 1992 have local keywords
    Series
    Advances in knowledge organization; vol.9
  20. Riesthuis, G.J.A.; Zumer, M.: FRBR and FRANAR : subject access (2004) 0.00 
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    Abstract
    In the last decade a discussion has been going an in the Division of Bibliographic Control of the International Federation of Library Associations and Institutions (IFLA) about the principles of cataloguing. This discussion was initiated by the widespread replacement of the card and list catalogues by Online Public Access Catalogues (OPACs) since 1980. In this paper we discuss the role of subject cataloguing in three important documents that are the results of this discussion. Our conclusion is that the interest in subject cataloguing has grown remarkably, but is still not an the level it deserves given the fact that a great part of all searches in OPACs are subject oriented.
    Content
    1. Introduction In this paper we address two questions: 1. What is the position of subject indexing in the thinking of the library world after the publication of the Functional Requirements for Bibliographic Records (1998)? 2. Is this position in accordance with the requirements of the users searching for documents about a given subject? Research Shows that searching an a topic (i.e. subject access) is an important, even predominant type of end-user searching of library catalogues and even more so of other bibliographic databases. Between one third and two thirds of all OPAC searches are probably subject searches (Large & Beheshti, 199%). Taking into account different ways in which searching an a topic is implemented in library catalogues (subject headings, classification, keywords only) the percentage may be even higher. For example title word searching may be a substitute for subject searching if no better tools are available. In the light of this it is not surprising that the Functional Requirements for Bibliographic Records (FRBR) (1998) pays attention to subject searching, as well as the Functional Requirements and Numbering of Authority Records (FRANAR) (2003). Also the Statement of International Cataloguing Principles: Final draft of 19 December 2003, which is the result of the first First IFLA Meeting of Experts an an International Cataloguing Code mentiong subject access as a function of cataloguing (Statement, 2003). In this paper we discuss the ways these three documents deal with subjects.
    Series
    Advances in knowledge organization; vol.9

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