Search (31 results, page 1 of 2)

Beccaria, M.; Scott, D.: Fac-Back-OPAC : an open source interface to your library system (2007) 0.04

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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

Khoo, C.S.G.; Wan, K.-W.: ¬A simple relevancy-ranking strategy for an interface to Boolean OPACs (2004) 0.03
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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

Matsui, S.; Konno, H.: Evaluation of World Wide Web access to OPACs of public libraries in Japan : functional survey of 46 OPAC systems and end user survey of three of those systems (2000) 0.02

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Sridhar, M.S.: Subject searching in the OPAC of a special library : problems and issues (2004) 0.02

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Source: OCLC systems and services. 20(2004) no.4, S.183-191

Markey, K.: Twenty-five years of end-user searching : part 1: research findings (2007) 0.01
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Abstract

This is the first part of a two-part article that reviews 25 years of published research findings on end-user searching in online information retrieval (IR) systems. In Part 1 (Markey, 2007), the author seeks to answer the following questions: What characterizes the queries that end users submit to online IR systems? What search features do people use? What features would enable them to improve on the retrievals they have in hand? What features are hardly ever used? What do end users do in response to the system's retrievals? Are end users satisfied with their online searches? Summarizing searches of online IR systems by the search features people use everyday makes information retrieval appear to be a very simplistic one-stop event. In Part 2, the author examines current models of the information retrieval process, demonstrating that information retrieval is much more complex and involves changes in cognition, feelings, and/or events during the information seeking process. She poses a host of new research questions that will further our understanding about end-user searching of online IR systems.
Markey, K.: Twenty-five years of end-user searching : part 2: future research directions (2007) 0.01
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Abstract

This is the second part of a two-part article that examines 25 years of published research findings on end-user searching of online information retrieval (IR) systems. In Part 1, it was learned that people enter a few short search statements into online IR systems. Their searches do not resemble the systematic approach of expert searchers who use the full range of IR-system functionality. Part 2 picks up the discussion of research findings about end-user searching in the context of current information retrieval models. These models demonstrate that information retrieval is a complex event, involving changes in cognition, feelings, and/or events during the information seeking process. The author challenges IR researchers to design new studies of end-user searching, collecting data not only on system-feature use, but on multiple search sessions and controlling for variables such as domain knowledge expertise and expert system knowledge. Because future IR systems designers are likely to improve the functionality of online IR systems in response to answers to the new research questions posed here, the author concludes with advice to these designers about retaining the simplicity of online IR system interfaces.

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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Date: 10. 9.2000 17:38:22

Moulaison, H.L.: OPAC queries at a medium-sized academic library : a transaction log analysis (2008) 0.01

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Date: 10. 9.2000 17:38:22

Hildreth, C.R.: Are Web-based OPACs more effective retrieval systems than their conventional predecessors? : an experimental study (2000) 0.01
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Abstract

The World Wide Web (simplified here to "Web") is well-known for its "point and click" graphical user interface (GUI) and hyperlink search and navigate capabilities. When OPACs are placed in this operational context, users can easily hyperlink from a bibliographic display to related search terms, class marks, or bibliographic records. This hyperlinking capability is not available in most conventional text-based OPACs. As more and more users undertake their searches on Web-based information retrieval systems such as OPACs, it is natural to ask, "Are Web-based OPACs more effective retrieval systems than their conventional predecessors?" This paper presents the findings of an experimental study which compared users' search performance, assessments of ease of use, and satisfaction with search results after use of a Web OPAC or its conventional counterpart. The primary questions addressed by this research center on the influence of two experimental factors, OPAC search interface style and search task level of difficulty, on the dependent variables: actual search performance, perceptions of ease of use, and user assessments of satisfaction with search results. It was hypothesized that Web OPACs would be assessed as easier to use and that they would outperform conventional OPACs when measured by actual search results and users' levels of satisfaction with search results. Web OPAC searchers outperformed Text OPAC searchers, but search task level of difficulty is a major determinant of search success. The study also found little association between searchers' level of satisfaction with results and actual search performance
Furner, J.: On Recommending (2002) 0.01
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Abstract

By "recommending'' Furner refers to collaborative filtering where multiple user rankings of items are used to create a single new ranking for a user, or to a system itself generating rankings of items for its users. This would include document retrieval systems as a subset recommending systems in the second instance, but in the first would make document retrieval system and recommending system synonyms. Information seeking actions are classified either as evaluative (determining the worth of an item), recommending (expressing perceived worth), or informative (examining the content of an item). The task of the information retrieval system is to be to predict the particular ordering that the user would specify in a given context, given complete knowledge of the collection. Citations may be considered as the result of evaluative and recommending decisions by the author, and assigned index terms may be considered as the same sort of decisions by the indexer. The selection of relevant documents by a searcher from a list also involves evaluative and recommending decisions. This suggests that searchers should have the opportunity to bring multiple ranking techniques to bear.
Whitney , C.; Schiff, L.: ¬The Melvyl Recommender Project : developing library recommendation services (2006) 0.01
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Abstract

Popular commercial on-line services such as Google, e-Bay, Amazon, and Netflix have evolved quickly over the last decade to help people find what they want, developing information retrieval strategies such as usefully ranked results, spelling correction, and recommender systems. Online library catalogs (OPACs), in contrast, have changed little and are notoriously difficult for patrons to use (University of California Libraries, 2005). Over the past year (June 2005 to the present), the Melvyl Recommender Project (California Digital Library, 2005) has been exploring methods and feasibility of closing the gap between features that library patrons want and have come to expect from information retrieval systems and what libraries are currently equipped to deliver. The project team conducted exploratory work in five topic areas: relevance ranking, auto-correction, use of a text-based discovery system, user interface strategies, and recommending. This article focuses specifically on the recommending portion of the project and potential extensions to that work.

Breeding, M.: Thinking about your next OPAC (2007) 0.01

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Series: The systems librarian

Bates, M.J.: Improving user access to library catalog and portal information (2004) 0.01

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Abstract: In this lecture, Dr. Bates summarizes the research she recently conducted in her role as a Principal Investigator for the Library of Congress Action Plan on Bibliographic Control of Web Resources. Her investigations focused on three particular topics: User access vocabulary, Links among bibliographic families, and Staging of access to resources in the interface. From each of these perspectives, she shares her recommendations on how to achieve enhanced access to and display of records for selected Web resources across multiple systems.

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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Date: 22. 9.1997 19:16:05

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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Date: 10. 9.2000 17:38:22

Jansen, B.J.; Pooch , U.: ¬A review of Web searching studies and a framework for future research (2001) 0.01
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Abstract

Jansen and Pooch review three major search engine studies and compare them to three traditional search system studies and three OPAC search studies, to determine if user search characteristics differ. The web search engine studies indicate that most searchers use two, two search term queries per session, no boolean operators, and look only at the top ten items returned, while reporting the location of relevant information. In traditional search systems we find seven to 16 queries of six to nine terms, while about ten documents per session were viewed. The OPAC studies indicated two to five queries per session of two or less terms, with Boolean search about 1% and less than 50 documents viewed.

Breeding, M.: ¬The birth of a new generation of library interfaces (2007) 0.01

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Series: The systems librarian

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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Date: 2.12.2007 19:39:22

Novotny, E,: I don't think I click : a protocol analysis study of use of a library online catalog in the Internet age (2004) 0.01
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Abstract

There's something magical about interface design. The research done to determine user behavior that leads to design decisions is positively fascinating. This time round we have a group at Penn State testing the proficiency of users on their brand new OPAC. The users were divided into two groups, "experienced" and "first-time". Results confirm other studies in this area, namely, that when confronting an OPAC, users both experienced and not, assume they're in front of something similar to Google. They go for keywords by default, expect results ranked by relevancy (as opposed to chronology), make no use of Boolean Operators, have no idea of what information is actually indexed, and lack the curiosity or time to "learn the system". "We can either abandon this population," the author stresses, "or design systems that do not require expert knowledge to be used effectively.
Lombardo, S.V.; Condic, K.S.: Empowering users with a new online catalog (2000) 0.01
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Abstract

In June 1998 Oakland University's library migrated to a new online catalog. In order to determine user acceptance of the new OPAC, students receiving library instruction were asked to complete an open-ended questionnaire eliciting comments on their likes, dislikes and online catalog preference. From the data collected, a second questionnaire was designed and distributed that focused on specific features of the new catalog identified in the first survey. Results indicated that users overwhelmingly preferred the new OPAC and found it easy to use; however, they experienced some difficulty using special features like truncation. The most popular feature of the new catalog was its remote access capability. Second-generation OPACs possess features - such as electronic reserves capabilities and hypertext links - that are beginning to simplify the search process; but they have not yet developed into the intuitive, comprehensive systems that can empower users to seek information in new ways.

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