摘要:

AbstractWith respect to information storage and retrieval, a thesaurus is a means to various ends. This paper describes these desired ends (and the utility of a thesaurus with respect thereto) and provides a case history of symbiotic development of an information system (for financial information) and its thesaurus. In this connection, the DISCLOSURE data base publication system and thesaurus are described, and the applications of the thesaurus both to the data base system and to retrieval applications are described. The history of thesaurus development, its present status, its planned future, and its costs vs. its benefits are summarized.

ISSN:0002-8231    

DOI:10.1002/asi.4630260202

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY

摘要:

AbstractIndicators of national scientific activity have been derived from counts of 500,000 publications, and millions of citations, in 492 large and heavily cited scientific journals in seven major disciplines, six major countries, and a time span from 1965 to 1971. For 1972 the publication and citation counts covered 2143 journals. All of the citation data, and much of the publication data, were from journals covered by the Science Citation Index (SCI). The publication counts indicate clear first rank position for the U.S. in scientific publications, followed at a significant distance by the Soviet Union. Far below the U.S. and U.S.S.R. are the United Kingdom and Germany, followed by Japan and France. The national publication rankings vary widely from discipline to discipline, with Soviet chemistry high, physics moderate and biology low. The U.S. is the most highly cited country, followed by the U.K.; Germany and Japan are at a middle level, with French and Soviet publications the least heavily cited.

ISSN:0002-8231    

DOI:10.1002/asi.4630260203

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY

摘要:

AbstractA computer program for automatic extraction of case summaries and dispositions from the decisions of legal courts is now operational. The level of performance of this program known as LEXtractor is high. In a recent computer run, LEXtractor scanned the full texts of 249 reported cases (some 650,000 words of text) and extracted correctly 92% of case summaries (15 false drops occurred) and 93% of case dispositions (no false drops occurred).This paper outlines the structure of LEXtractor, describes and analyzes its cost and performance, and discusses some relevant issues in text editing.

ISSN:0002-8231    

DOI:10.1002/asi.4630260204

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY

摘要:

AbstractThe difficulty and expense of acquiring textual material in machine‐readable form is a major barrier to more extensive use of computers in libraries. This paper discusses the reduction of data generation costs, by the use of the IBM MT/ST typewriter and tape converter to eliminate redundancy in keying opera‐ tions. Their use in the production of World Aluminum Abstracts is presented as a typical applicat

ISSN:0002-8231    

DOI:10.1002/asi.4630260205

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY

摘要:

AbstractDocuments may be accessed by increasingly efficient retrieval of abstracts, but information will not be transferred unless the abstracts are read. It is suggested that the measurement of the readability of abstracts can provide an assessment of one phase of an information system: the system/user interface. Controlled reading levels for abstracts could result in more rapid processing of abstracts and a wider use of the information system. It was hypothesized that the use of readability principles in guidelines for abstracting would result in abstracts of lower reading levels than the source documents upon which they were based. Abstracts and their source documents were selected randomly from the information system supported by the Educational Resources Information Center (ERIC); readability scores were calculated using the Flesch Reading Ease formula. Comparisons among reading levels were made using analysis of variance for correlated data and Tukey's Honestly Significant Difference (HSD) test for post hoc comparisons. Results indicated that the reading level of abstracts was significantly higher than the reading level of source documents, but not higher than the reading ability of the intended audience. It was concluded that readability measurement provides one useful techinque for hte evaluation of abstracts.

ISSN:0002-8231    

DOI:10.1002/asi.4630260206

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY

摘要:

AbstractConsideration is given to the nature of the retrieval process with emphasis on the selection algorithm employed, and its relation to document set and query form.Proof is given of the equivalence of Boolean and weighted search methods, this proof being based on the ability to convert any Boolean search request to weighted form and, similarly, any weighted request to Boolean form.

ISSN:0002-8231    

DOI:10.1002/asi.4630260207

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY

摘要:

AbstractAppending a checksum (also known as checkring] digit[sl, or control digit[s]/sum) to a lengthy non‐mnemonic number sequence represents one technical control over transcription errors. Different checksum procedures are used by different nations (e.g., France, Denmark, Canada) for their personal identifiers (The U.S. does not use a checksum). This study reflects an attempt to discover the most effective procedur

ISSN:0002-8231    

DOI:10.1002/asi.4630260208

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY

ISSN:0002-8231    

DOI:10.1002/asi.4630260209

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY

ISSN:0002-8231    

DOI:10.1002/asi.4630260211

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY

ISSN:0002-8231    

DOI:10.1002/asi.4630260213

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1975

数据来源: WILEY