Search (7 results, page 1 of 1)

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Abstract

Reviews the significant changes in information technology over the last 50 years and considers the many implications for information services. The Internet, global access to distributed information sources, and remote users all present challenges to would-be providers of information services. As resources proliferate, the information professional must develop new methods for locating and accessing them: reliance on publishers and reviews is no longer sufficient. Information service providers can now serve more diverse clienteles, but must be aware of the greater range of information needs and styles of information seeking. The continuing challenge is to harness the information technologies to meet these needs

Date

22. 2.1999 16:50:03

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Abstract

A simpler model is proposed for estimating the frequency of any same-frequency words and identifying the boundary point between high-frequency words and low-frequency words in a text. The model, based on a 'maximum-ranking method', assigns ranks to the words and estimates word frequency by a formula. The boundary value between high-frequency and low-frequency words is obtained by taking the square root of the number of different words in the text. This straightforward model was used successfully with both English and Chinese texts

Source

Journal of the American Society for Information Science. 50(1999) no.3, S.280-286

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Abstract

Discusses the human-computer interface for information retrieval and notes that research on human-computer interface design has generated many widely-accepted principles of interface design which should be of interest and value to designers of information retrieval systems. Work on display features such as highlighting, colour, icons, and windows has received considerable attention. research has also focused on how the user interacts with the system, whether by commands, menus, or direct manipulation. Studies of interfaces for information retrieval systems reveal that online searching has emphasised developments of front ends, with some novel uses of graphics. CD-ROM and optical media are characterised by interface diversity, again with some inclusion of graphic interfaces. Online catalogues and full text data bases have provided interesting comparisons of mode of interaction

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Abstract

Book announcements in the health sciences and in fiction were used as samples to observe the presence of bibliographic records and to monitor the rate of addition of institution symbols in the OCLC Online Union Catalog. Preliminary results indicate that, for the vast majority of titles, records already existed in the Online Union Catalog when the title was announced. The rates of addition of holding libraries suggest that libraries used the health science titles in an essentially linear manner, while added locations for the fiction titles follow an exponential curve.

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Abstract

The WilsonDisc user interface for CD-ROM searching was evaluated using heuristic evaluation and observation of experienced users and used 2 Wilson Disc databases: MLA International Bibliography and Humanities Index. The heuristic evaluations identified 51 different problems, while observations found only 8. However, the major problem encountered by users: changing of the databases, was not found through heuristic evaluation. Suggests that expert evaluators explicitely consider the user interface environment, the context in which users elect to use the system

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Source

Technical services management: 1965-1990. A quarter of a century of change and a look into the future. Festschrift for Kathryn Luther Henderson. Ed.: L.C. Smith et al

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Abstract

Reports on a study conducted at Indiana University in the summer of 1993 which observed 10 advanced graduate students in language and literature studies as they conducted literature searches using databases on CD-ROM. Presents a brief review of related literature on relevance judgements, human-computer interaction (HCI) and information seeking behaviour of humanities students. The search strategies of the graduate students under study were found to be typical of humanities scholars, who create large sets and review records quickly to select relevant items. Factors influencing relevance assessments included language, source of publication, author, and length of work. Participants especially appreciated electronic access to the Modern Language Association (MLA) International Bibliography but encountered problems with the controlled vocabulary and analytic entries for books and proceedings. The study has identified problems with database content, presentation and search interfaces which should be considered by system designers