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Article
Publication date: 1 May 1994

E. Michael Keen

This article reports an attempt to understand how a new non‐Boolean ranked output online search facility works. In December 1993, Data‐Star Dialog released a relevance…

Abstract

This article reports an attempt to understand how a new non‐Boolean ranked output online search facility works. In December 1993, Data‐Star Dialog released a relevance ranking tool known as TARGET (Dialog 1993b). There is considerable research activity into text retrieval using ranking methods, as instanced by the TREC experiments (Harman 1993), and professional online searchers may wish to know exactly what the ranking algorithm does in order to be able to exploit the facility to best advantage. Though it has not been possible to ‘crack’ the algorithm to the level of calculating its match to the nearest per cent, it is possible to see three or four factors at work in the way TARGET produces items ranked in decreasing order of match with a query. It is emphasised that the analysis presented here is based only on records from one bibliographic database. A more extensive and comparative study of bibliographic and full‐text databases would be needed to provide universal and definitive findings.

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Online and CD-Rom Review, vol. 18 no. 5
Type: Research Article
ISSN: 1353-2642

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Article
Publication date: 1 February 1990

E. Michael Keen

The task of inputting records into an inhouse database for use in instructing students and for research into retrieval techniques, is now assumed to be cheap and easy by…

Abstract

The task of inputting records into an inhouse database for use in instructing students and for research into retrieval techniques, is now assumed to be cheap and easy by means of record transfer from CD‐ROM. During a recent operation of this kind a number of unforeseen problems were encountered, and the whole operation required 20 sub‐operations. But the task was quite successful, so it was decided to retrace the steps and measure carefully the time taken and computer storage requirements needed.

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Program, vol. 24 no. 2
Type: Research Article
ISSN: 0033-0337

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Article
Publication date: 1 January 1968

MICHAEL KEEN

Document retrival systems are designed and implemented for the purpose of satisfying the information needs of a group of users, and the final stage of the technical…

Abstract

Document retrival systems are designed and implemented for the purpose of satisfying the information needs of a group of users, and the final stage of the technical processes required is the search of the stored file of documents or document surrogates. Studies of many aspects of retrieval systems have been made, but work has concentrated on the indexing or input stage, and little attention has been paid to the search or output stage.

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Aslib Proceedings, vol. 20 no. 1
Type: Research Article
ISSN: 0001-253X

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Article
Publication date: 1 January 1991

E. MICHAEL KEEN

Term position information, as provided in some Boolean systems in the form of field restriction and term proximity, is reviewed and its value assessed. Non‐Boolean…

Abstract

Term position information, as provided in some Boolean systems in the form of field restriction and term proximity, is reviewed and its value assessed. Non‐Boolean retrieval in the form of the ranked output experiment has not so far used term position information but has concentrated on schemes of term weighting. The use of term proximity devices is proposed here by analogy with Boolean techniques and seven algorithms are devised to incorporate the ideas of sentence matching, proximate terms, term order specification and term distance computations. It is hypothesised that term position will act as a precision device. A new search experiment is then described in which a test collection is processed into sentences and then output ranking using term position is obtained. Results are given for five algorithms compared against quorum searching as the benchmark. The best result increased the precision ratio by 18% and used proximate matching term pairs in sentences plus a distance component.

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Journal of Documentation, vol. 47 no. 1
Type: Research Article
ISSN: 0022-0418

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Article
Publication date: 1 January 1977

E. MICHAEL KEEN

After considering the search process and functions of index entries, a classification of entry types is offered, based on index term context, predominant term order, and…

Abstract

After considering the search process and functions of index entries, a classification of entry types is offered, based on index term context, predominant term order, and between‐term function words. Then a multiple entry generation scheme is described, comprising rules for term manipulation, input and output. After discussing access points and cross reference measures, a preliminary linguistic analysis is given, showing links with psycholinguistics. The study forms the basis of a current laboratory investigation (EPSILON) into a number of entry types.

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Journal of Documentation, vol. 33 no. 1
Type: Research Article
ISSN: 0022-0418

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Article
Publication date: 1 April 1977

E. MICHAEL KEEN

Reports a laboratory experiment in which verbalized tape‐recorded searches on five printed subject indexes reveal something of the linguistic processing that took place…

Abstract

Reports a laboratory experiment in which verbalized tape‐recorded searches on five printed subject indexes reveal something of the linguistic processing that took place. Some 20% of the entries examined were changed grammatically, by word order change or function word supply, according to the linguistic form of the index concerned. Extracts from the search transcriptions are given, and the search processing modes of seeking, scanning, and screening are discussed.

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Journal of Documentation, vol. 33 no. 4
Type: Research Article
ISSN: 0022-0418

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Article
Publication date: 1 January 1973

E. MICHAEL KEEN

Reports a laboratory comparison of the effectiveness and efficiency of five index languages in the subject area of library and information science; three post‐co‐ordinate…

Abstract

Reports a laboratory comparison of the effectiveness and efficiency of five index languages in the subject area of library and information science; three post‐co‐ordinate languages, Compressed Term, Uncontrolled, and Hierarchically Structured, and two pre‐co‐ordinate ones, Hierarchically Structured and Relational Indexing. Eight test comparisons were made, and factors studied were index language specificity and linkage, indexing specificity and exhaustivity, method of co‐ordination, the precision devices of partitioning and relational operators, and the provision of context in the search file. Full details of the test and retrieval results are presented.

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Journal of Documentation, vol. 29 no. 1
Type: Research Article
ISSN: 0022-0418

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Article
Publication date: 1 January 1996

MARISTELLA AGOSTI, MICHELINE BEAULIEU, CYRIL CLEVERDON, HANS‐PETER FREI, NORBERT FUHR, DAVID HARPER, PETER INGWERSEN, MICHAEL KEEN, RAINER KUHLEN, STEPHEN ROBERTSON, ALAN SMEATON, KAREN SPARCK JONES, KEITH VAN RUSBERGEN and PETER WILLETT

Sir, We write to record our debt, and that of our colleagues, to one of the founding fathers of information retrieval, Gerard (Gerry) Salton, who died on 28th August 1995…

Abstract

Sir, We write to record our debt, and that of our colleagues, to one of the founding fathers of information retrieval, Gerard (Gerry) Salton, who died on 28th August 1995 in Ithaca, ny at the age of 68. Information retrieval was established as a new academic discipline by a small number of pioneers, Gerry among them, who recognised the need for, and the research challenges presented by, the automated indexing, storage and retrieval of text documents. He brought academic rigour and scholarship to establishing the foundations of this discipline, and we acknowledge his influential contributions to the theory, experimental methods, and practice of information retrieval.

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Journal of Documentation, vol. 52 no. 1
Type: Research Article
ISSN: 0022-0418

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Article
Publication date: 1 April 1999

Michael Keen

An electronic alerting service which gathers both conventional and electronic documents and presents them to users still needs a vocabulary to match documents with…

Abstract

An electronic alerting service which gathers both conventional and electronic documents and presents them to users still needs a vocabulary to match documents with profiles. Based on a project in the Electronic Libraries Programme known as NewsAgent; a personalised current awareness service for library and information staff, a design for a controlled vocabulary is described based on three levels of specificity: Channels, Topics and Keywords. The printed models for these vocabularies are identified, and examples given from the field of Library and Information Services. NewsAgent decided to adopt the Dublin Core metadata scheme in which to include this vocabulary, and details of both the simple and advanced use of this metadata by NewsAgent are discussed and illustrated, including the use of standard resource types which include an indication of quality. The publications which were used in the trial of NewsAgent are identified, and some future developments in electronic alerting outlined.

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VINE, vol. 29 no. 4
Type: Research Article
ISSN: 0305-5728

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Article
Publication date: 1 February 1984

Sue Sharpies

From 13 up to 30 in 1984 is the hoped for expansion rate of Grand Metropolitan's fast food restaurants, Huckleberry's. They see themselves becoming a national chain to vie…

Abstract

From 13 up to 30 in 1984 is the hoped for expansion rate of Grand Metropolitan's fast food restaurants, Huckleberry's. They see themselves becoming a national chain to vie with the likes of McDonald's and Wimpy. Giving them a new image to present an alternative to the ubiquitous red and yellow fast food uniform is Michael Peters Partnership. They have designed a subtle and sophisticated restaurant to suit the “second generation” of fast food customers. Sue Sharpies describes Huckleberry's new found confidence and takes a look at the Putney pilot.

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Retail and Distribution Management, vol. 12 no. 2
Type: Research Article
ISSN: 0307-2363

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