Search (9 results, page 1 of 1)

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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

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Abstract

Reports on the state-of-the art of online catalogues and considers propects for future developments. Describes the background and origins of OPACs. Considers the limitations of second generation systems which are failing to meet the needs of users. Examines new approaches to their design which include: user-centre design, interface design, use of advanced retrieval techniques, and their use in the network environment. Considers future developments of OPACs taking into account developments in other electronic information sources

Source

Information UK outlooks. 1993, H.4, S.3-11

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Theme

Semantisches Umfeld in Indexierung u. Retrieval

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Abstract

Presents a brief report on a study, carried out by the Centre for Interactive Systems Research, City University, to investigate the techniques used for evaluating OPACs: to explore and assess different data gathering methods in studying information seeking behaviour at the on-line catalogue; and to examine how a transaction logging facility could be enhanced to serve as a more effective diagnostic tool. For a full report see British Library research paper 78

Pages

S.20-22

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Abstract

An online library catalogue served as a testbed to evaluate an interactive query expansion facility based on relevance feedback for the Okapi probabilistic term weighting retrieval system. The facility was implemented in a graphical user interface (GUI) environment using a game-board metaphor for the search process, and allowed searchers to select candidate terms extracted from relevant retrieved itms to reformulate queries. The take-up of the interactive query expansion option was found to be lower, and its retrieval performance less effective, compared to previous tests featuring automatic query expansion. Contributory factors including the number, presentation and source of terms are discussed

Theme

Semantisches Umfeld in Indexierung u. Retrieval

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Abstract

Describes the OKAPI projects and OKAPI's development as an experimental online catalogue system over 10 years, first at the University of Westminster (formerly the Polytechnique of Central London) and subsequently at City University, London. The 1st OKAPI project in 1984 introduced 'best match' retrieval and focused on the user interface design. The 2nd investigated word stemming, spelling correction and cross reference tables as retrieval aids. A comparative study of 2 library catalogues was undertaken in 1987, while in 1988 query expansion and relevance feedback were introduced and evaluated by laboratory tests. In 1990 live evaluation of automatic query expansion was carried out and in 1993 subject enhancement of bibliographic records was investigated. The latest project has examined the design of a graphical user interface to support interactive query expansion. Discusses the research and evaluation of each project

Theme

Semantisches Umfeld in Indexierung u. Retrieval

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Abstract

A project to design a graphical user interface for the OKAPI online catalogue search system which uses the basic term weighting probabilistic search engine. Presents a research context of the project with a discussion of interface and functionality issues relating to the design of OPACs. Describes the design methodology and evaluation methodology. Presents the preliminary results of the field trial evaluation. Considers problems encountered in the field trial and discusses contributory factors to the effectiveness of interactive query expansion. Highlights the tension between usability and functionality in highly interactive retrieval and suggests further areas of research

Theme

Semantisches Umfeld in Indexierung u. Retrieval

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Abstract

Assesses the appropriateness of graphic user interfaces (GUI), and more specifically the Windows based interfaces used for CD-ROM database applications. An evaluation model was devised to carry out an expert evaluation of the interfaces of 7 CD-ROM databases: Economist on CD-ROM; ADMYTE (Digital Archive of Spanish Texts and Manuscripts); English Poetry (Chadwyck-Healey); Oxford English Dictionary 2nd ed. on CD-ROM; Perinorm; OVID Medline and WinSPIRS Medline. The model identified 2 levels of interaction, the dialogue level aand the task level, and focused on general interface features, search and retrieval tasks, and output and processing options as well as the help facilities. Results are discussed in the light of HCI Usability Criteria and design guidelines (including general interface design guidelines, specific Windows design guidelines and the CD-ROM Consistent Interface Guidelines) to assess to what extent the applications comply and appropriate recommendations make

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Source

Perspectives in information management 1. Ed.: C. Oppenheim