Myles Blomefylde, Elizabethan physician, alchemist and book collector: a sketch of a life     

Baker DC  Murphy JL 《The Bodleian Library record》1982,11(1):35-46

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What's ahead for secondary services     

Leufield L 《Bulletin of the American Society for Information Science / ASIS》1982,9(2):40-43

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Mental models: ways of looking at a system     

Borgman CL 《Bulletin of the American Society for Information Science / ASIS》1982,9(2):38-39

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The Oslers and the College of Physicians of Philadelphia     

Holloway L 《Osler Library newsletter》1975,(20):1-4

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A description of the catalog division project at the College of Physicians of Philadelphia Library.     

S B Caspari  E L Batty 《Bulletin of the Medical Library Association》1975,63(3):302-308

This paper describes the procedures used at the Library of the College of Physicians of Philadelphia to divide its ninety-year-old dictionary card catalog. The division was necessitated by overcrowding, obsolete subject headings, and lack of a complete authority list which resulted in like materials being scattered throughout the catalog under several headings. Two catalogs were created: the historical-biographical catalog, representing all works published before 1950 and all works of historical or biographical nature; and the current catalog, containing all works published from 1950 on, excepting historical or biographical materials. The 1950- catalog was further divided into name and subject catalogs, and the subject section was revised according to MeSH. The project was completed in about two years. As a result, searching time has been much reduced, and the library is able to take advantage of the annual revisions of MeSH to update the subject catalog.  相似文献   

介绍国外权威文献传递服务机构   总被引：4，自引：0，他引：4  

吕青 《图书馆建设》2006,(6):55-57

目前网上文献传递服务在各大图书馆和情报机构都有一定的发展。本文主要从文献传递的特点、文献收藏、服务情况、服务周期、服务对象和服务费用等方面对国外几家较著名的网上文献情报机构进行介绍,以期对我们的文献传递服务工作提供帮助和参考。  相似文献   

Communicating Prevention: The Effects of the keepin' it REAL Classroom Videotapes and Televised PSAs on Middle-School Students' Substance Use     

Jennifer R. Warren  Michael L. Hecht  David A. Wagstaff  Elvira Elek  Khadidiatou Ndiaye  Patricia Dustman  Flavio F. Marsiglia 《Journal of Applied Communication Research》2006,34(2):209-227

This study sought to determine if exposure to two communication-oriented activities, videotapes and public service announcements, accounts for changes in substance use among adolescents participating in the Drug Resistance Strategies Project's keepin' it REAL adolescent substance use prevention curriculum. Middle-school students (4,734, 72% Latino) responded to questionnaires related to these analyses. An analysis of covariance (ANCOVA) model was fit separately to six substance use outcomes. The results suggested that intervention students who saw four or five videos engaged in less substance use in the past month than did students who saw fewer videos. Having seen the PSAs one or more times did not predict the reported change in substance use.  相似文献   

Construction of query concepts based on feature clustering of documents     

Youjin Chang  Minkoo Kim  Vijay V. Raghavan 《Information Retrieval》2006,9(3):231-248

In Information Retrieval, since it is hard to identify users’ information needs, many approaches have been tried to solve this problem by expanding initial queries and reweighting the terms in the expanded queries using users’ relevance judgments. Although relevance feedback is most effective when relevance information about retrieved documents is provided by users, it is not always available. Another solution is to use correlated terms for query expansion. The main problem with this approach is how to construct the term-term correlations that can be used effectively to improve retrieval performance. In this study, we try to construct query concepts that denote users’ information needs from a document space, rather than to reformulate initial queries using the term correlations and/or users’ relevance feedback. To form query concepts, we extract features from each document, and then cluster the features into primitive concepts that are then used to form query concepts. Experiments are performed on the Associated Press (AP) dataset taken from the TREC collection. The experimental evaluation shows that our proposed framework called QCM (Query Concept Method) outperforms baseline probabilistic retrieval model on TREC retrieval.  相似文献   

Book reviews     

Roy Kaufman  Endre L. Beky  Zhumin Sun 《Publishing Research Quarterly》2004,20(1):93-96

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The Efficacy Gap and Political Participation: When Political Influence Fails to Meet Expectations     

McCluskey  Michael R.; Deshpande  Sameer; Shah  Dhavan V.; McLeod  Douglas M. 《Int. Journal of Public Opinion Research》2004,16(4):437-455

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