Search (2314 results, page 2 of 116)

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Abstract

Reports results of searching the WWW for the term 'medican informatics' on 6 Web search engines and briefly reviews a number of selected Web site focusing on medical informatics auch as http://www.cpmc.columbia.edu/edu/textbook/ and http://www.hslib.washington.edu/informatics

Object

Science Citation Index

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Abstract

Reports the launch, by the Research Libraries Group, of Eureka on the Web: a new WWW search option and user interface for its Research Libraries Information Network (RLIN) bibliographic database, CitaDel citation files, and English Short Title Catalog

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Abstract

Die Häufigkeit von Zitierungen wissenschaftlicher Publikationen kann in erster Näherung als Maßstab für ihre inhaltliche Qualität gelten. Die Journal Citation Reports (JCR) des ISI ordnen über die Auszählung von Referenzen aus mehreren tausend Fachzeitschriften durch diverse bibliometrische Indikatoren Zeitschriften einen bestimmten Wert zu. Der Aufbau der Datensammlung sowie die verwendeten Indikatoren werden näher beschrieben. 2 Methoden werden vorgestellt, mit denen in Anwendung der JCR eine Menge von Kernzeitschriften für ein Fachgebiet ermittelt werden kann. Probleme der Zuverlässigkeit bei der Sammlung und Verarbeitung der Zitierdaten durch die JCR werden dargestellt. Die Anwendbarkeit einer Zitatenanalyse für den Bestandsaufbau bei Fachzeitschriften wird untersucht. Sie kann zur Entscheidungsfindung beitragen, andere Methoden aber nicht ersetzen

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Abstract

The inability of students to evaluate information sources often results in lists of bibliographic references that may be termed, relative to student needs, value-zero citations. This problem has exacerbated by the advent of CD-ROM databases that may yield more but not necessariliy more relevant information to undergraduate students. Reports the findings of a 2-part study conducted at the Alexander Library, Rutgers Univ. to discover what problems students were having that led to this situation. The study emphasises a 2-tier value-added instructional model that incorporates the reaching of critical thinking skills, in terms of evaluating citation elements, and information sources

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Abstract

This article reports on an exploratory study of the measurement of commonality in the use of variables or measures by authors and groups of authors who have reported on studies of information retrieval system users. There is some similarity to co-citation analysis in that, when 2 individual papers, or 2 authors of sveral works, use the same variables, this indicates a similarity in approach to the subject. Such usage may be a stroger indication of similarity than co-citation be cause it represents what the authors did, rather than what they say

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Abstract

Reports recent experiences with the publishing, via the Internet and WWW of ISI's biweekly newspaper, The Scientist; which was originally mounted on the NSFnet. Compares the use of the Internet for SDI by comparing Web searches via AltaVista with similar searches on CD-ROM. Predicts that future current awareness services and SDI services will be linked to electronic periodicals in electronic libraries. Concludes with a note on cited reference searching, a variation on the theme of hypertext searching, with particular reference to SCI and Web crawlers

Object

Science citation index

Theme

Citation indexing

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Theme

Citation indexing

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Abstract

Thematic issue devoted to 'Theories of citation?'

Theme

Citation indexing

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Abstract

ISI is currently offering its citation index databases for access by Intranets via its proprietary WWW browser

Object

Science Citation Index
Social Sciences Citation Index

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Abstract

Reports the introduction of a new proximity searching capability to the NLM's ELHILL software in Mar 95. Searchers are now able to scan various fields in a citation for concepts contained within an individual sentence. The 3 proximity operators are: ADJ, NEAR and CONTAINS. At the time of writing, these operators are only available for searching MEDLINE and other ELHILL databases but not for PDQ or any of the TOXNET databases or data banks

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Abstract

The library and Internet communities have been working on standards for identifying and referencing electronic resources. Reports on recent library efforts, including work to record URL and URN (Uniform Resource Locator and Uniform Resource Number) information in USMARC records, and collaboration with the Internet Engineering Task Force (IETF) to define a Uniform Resource Citation for electronic publications

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Object

Science Citation Index

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Theme

Citation indexing

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Abstract

Capability and capacity in handling the topology of a special subject information field has made infomapping techniques and systems instrumental in information searching, monitoring and navigation. Applying the technique to communication networks can reveal the intellectual relationships among junior and senior researchers in the field, and can also show the continuing popularity of a particular researcher's citation record over time. Reports the use of Java in making a cartoon series of chronological maps based on citation analysis on a special subject field (nutrition and dietetics). The map making methods, Java programming, and statistical analysis of the map data are presented, and the advantage and significance of constructing Java maps in enhancing information retrieval discussed. Further technical developments in applying VRML to link together a 3-D spatial indexing system and a 2-D HTML Web site are suggested

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Abstract

Announces the availability of the Web of Science, a proprietary Web browser providing intranet access to the Citation Index databases from ISI. The new browser interface will allow researcher to browse indexed information and perform further research. Describes search options

Object

Science citation index
Social sciences citation index

Theme

Citation indexing

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Abstract

During the past decades, journal impact data obtained from the Journal Citation Reports (JCR) have gained relevance in library management, research management and research evaluation. Hence, both information scientists and bibliometricians share the responsibility towards the users of the JCR to analyse the reliability and validity of its measures thoroughly, to indicate pitfalls and to suggest possible improvements. In this article, ageing patterns are examined in 'formal' use or impact of all scientific journals processed for the Science Citation Index (SCI) during 1981-1995. A new classification system of journals in terms of their ageing characteristics is introduced. This system has been applied to as many as 3,098 journals covered by the Science Citation Index. Following an earlier suggestion by Glnzel and Schoepflin, a maturing and a decline phase are distinguished. From an analysis across all subfields it has been concluded that ageing characteristics are primarily specific to the individual journal rather than to the subfield, while the distribution of journals in terms of slowly or rapidly maturing or declining types is specific to the subfield. It is shown that the cited half life (CHL), printed in the JCR, is an inappropriate measure of decline of journal impact. Following earlier work by Line and others, a more adequate parameter of decline is calculated taking into account the size of annual volumes during a range of fifteen years. For 76 per cent of SCI journals the relative difference between this new parameter and the ISI CHL exceeds 5 per cent. The current JCR journal impact factor is proven to be biased towards journals revealing a rapid maturing and decline in impact. Therefore, a longer term impact factor is proposed, as well as a normalised impact statistic, taking into account citation characteristics of the research subfield covered by a journal and the type of documents published in it. When these new measures are combined with the proposed ageing classification system, they provide a significantly improved picture of a journal's impact to that obtained from the JCR.

Theme

Citation indexing

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Abstract

Leydesdorff, in his 1998 paper 'Theories of citation?', addresses the history of citations and citation analysis, and the transformation of a reference mechanism into a purportedly quantitative measure of research impact/quality. Examines different facets of citations and citation analysis, and discusses the validity of citation analysis as a useful measure of research impact/quality

Footnote

Contribution to a thematic issue devoted to 'Theories of citation?'

Theme

Citation indexing

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Object

Science Citation Index
Social Sciences Citation Index
Arts and Humanities Citation Index

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Date

30.11.1995 20:53:22

Source

Library technology reports. 31(1995) Jan-Feb., S.1-11x

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Abstract

Duplicate citations in databases and library and information centre catalogues are a frequent problem for end users and information professionals. Current practice involves downloading bibliographic citations from external sources and integrating them in local catalogues. Describes the main processes by which duplicates are removed and the cluster technique which allows citation comparison. A more extensive discussion is available on the ADBS website

Date

1. 8.1996 22:01:00