分布式环境下开放链接知识库的管理

针对当前分布式环境下支持开放链接的后台知识库无法实现资源共享的问题,结合面向信息机构的嵌入式NSTL资源集成服务系统的开发实践,提出一种可交互的分布式知识库管理方式,并设计和实现分布式知识库管理系统的交互功能.     

Relationship between an editor in chief's commentary publications and the impact factor of cardiovascular medicine journals

Journal impact factor (IF) inflation is suggested as a problem resulting from commentaries published by the editors in chief (EiCs) of their respective journals. However, it is unclear whether this is a systemic problem across the top thirty cardiovascular medicine journals. Therefore, the purpose of this investigation was to examine the relationship between the number of commentaries written by an EiC and their journal''s IF and Eigenfactor (Ef). Utilizing Spearman rank partial correlations controlling for length of service as the EiC, significant moderate correlations were found between the number of commentaries and the number of first-author commentaries by the EiC and the IF of their journal (r=0.568, p=0.001 and r=0.504, p=0.005; respectively). A weak but still significant correlation was found between the number of commentaries by the EiC and the Ef of their journal (r=0.431, p=0.020). The reason for these correlations is unclear, and whether the methodology used to compute the IF and Ef should be modified needs further research.     

How much effort is needed to keep up with the literature relevant for primary care?

OBJECTIVES: Medicine must keep current with the research literature, and keeping current requires continuously updating the clinical knowledge base (i.e., references that provide answers to clinical questions). The authors estimated the volume of medical literature potentially relevant to primary care published in a month and the time required for physicians trained in medical epidemiology to evaluate it for updating a clinical knowledge base. METHODS: We included journals listed in five primary care journal review services (ACP Journal Club, DynaMed, Evidence-Based Practice, Journal Watch, and QuickScan Reviews). Finding little overlap, we added the 2001 "Brandon/Hill Selected List of Print Books and Journals for the Small Medical Library." We counted articles (including letters, editorials, and other commentaries) published in March 2002, using bibliographic software where possible and hand counting when necessary. For journals not published in March 2002, we reviewed the nearest issue. Five primary care physicians independently evaluated fifty randomly selected articles and timed the process. RESULTS: The combined list contained 341 currently active journals with 8,265 articles. Adjusting for publication frequency, we estimate 7,287 articles are published monthly in this set of journals. Physicians trained in epidemiology would take an estimated 627.5 hours per month to evaluate these articles. CONCLUSIONS: To provide practicing clinicians with the best current evidence, more comprehensive and systematic literature surveillance efforts are needed.     

How relevant is the predictive power of the h-index? A case study of the time-dependent Hirsch index

The h-index has been shown to have predictive power. Here I report results of an empirical study showing that the increase of the h-index with time often depends for a long time on citations to rather old publications. This inert behavior of the h-index means that it is difficult to use it as a measure for predicting future scientific output.     

“Books.Google.RU”—Google's Mass Digitization of Russian‐Language Books

ABSTRACT. Google is pursuing “mass digitization” of Russian books as part of its efforts that now involve more than a dozen partners, although so far there is no separate Russian‐language search interface. How easy is it to find materials in books.google.com that are in Russian? What do users need to know to maximize their results?     

Testing the mediating role of cognitive responses in the elaboration likelihood model

Cognitive response theories such as the Elaboration Likelihood Model (ELM) have been criticized for lacking appropriate and rigorous empirical testing. As a result, the ELM in particular has little support for the proposed causal mechanism, cognitive responses, as a mediating variable between messages and attitude change. Using argument quality and source credibility manipulations, this investigation examines several causal models to assess the role of cognitive responses in the ELM. In general, the data supported the ELM's prediction that high quality arguments produce more favorable thoughts and subsequently more attitude change for high involvement receivers. Although a structural equation model supports the mediating role of cognitive responses in the ELM, the data are more consistent with a model derived from Information Processing Theory.     

Foreign/International

James D. Halloran and Michael Gurevich (eds.) Broadcaster/Researcher Co-Operation in Mass Communication Research (Centre for Mass Communication Research, University of Leicester, England, 1971 -- price not known, paper)

Global Communications in the Space Age (New York: Twentieth Century Fund, 1972 -- $1.00, paper)

Katherine Shervis (comp.) Satellite Teleconferencing: An Annotated Bibliography (Edsat Center, Space Science and Engineering Center, University of Wisconsin, Madison 53706 -- $2.00, paper)

0.J. Firestone's The Public Persuader: Government Advertising (Toronto: Methuen, 1970 -- $12.70)

Telenation (Canadian Broadcasting League, Box 1504, Ottawa, Canada KIP 5R5 -- $8.00 per year/12 issues)     

Media

Steven H. Chaffee and Michael J. Petrick's Using the Mass Media: Communication Problems in American Society (New York: McGraw-Hill, 1975—$6.95, paper)

Bibliography: Some Canadian Writings on the Mass Media (Ottawa: Canadian Radio-Television Commission , 1974—apparently free on request, paper)

Communications: Some Federal Proposals (Ottawa: Information Canada, 1975—price not known, paper)

Bernard C. Hennessy's Public Opinion (Belmont, Calif.: Duxbury Press/ Wadsworth, 1975—price not known, paper)

John G. Cawelti's The Six-Gun Mystique (Bowling Green, Ohio: Bowling Green University Popular Press, 1972—price not known, paper)

First Annual Report (Cambridge: Massachusetts Institute of Technology, December 1974—free on request, paper)     

An assessment of the discriminant validity of the checklist of behavior alteration techniques: A test of the item desirability bias in prospective and experienced teachers’ likelihood‐of‐use ratings

This study assessed the discriminant validity of the checklist of Behavior Alteration Techniques. Specifically, the ability of the BATs checklist procedure to discriminate between the likelihood that individual BATs would be selected and the social desirability of those same BATs was examined. The BATs checklist should discriminate between the likelihood that individual BATs would be selected and the social desirability of those same BATs because 50 years of observational studies of teacher discipline behavior suggest that teachers typically and routinely employ negative and antisocial strategies to correct student misbehavior (Burleson & Waltman, 1993). In a within‐subject, repeated measures designs, prospective teachers and experienced teachers provided likelihood‐of‐use and social appropriateness ratings to the BATs checklist in the four hypothetical situations typically employed with the BATs checklist. As predicted, likelihood‐of‐use and social appropriateness ratings were significantly correlated. Thus, the BATs checklist is not able to discriminate between the likelihood that BATs would be used and the social appropriateness of those BATs. As Campbell and Fiske (1959) have argued, an instrument's discriminant validity is a minimum standard that social scientific instruments must meet.     

Setting the agenda for environmental news: The effects of media and public characteristics

This study examined the relationship between different media agendas and public agendas in the agenda‐setting process. The local and regional media agendas for environmental news in the Lansing, Michigan, area were exactly the same. It was also found that respondents could accurately assess media issue emphasis when they were asked to do so.