首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   349篇
  免费   3篇
教育   269篇
科学研究   19篇
各国文化   4篇
体育   9篇
文化理论   4篇
信息传播   47篇
  2023年   2篇
  2022年   2篇
  2021年   2篇
  2020年   6篇
  2019年   5篇
  2018年   9篇
  2017年   7篇
  2016年   10篇
  2015年   3篇
  2014年   11篇
  2013年   110篇
  2012年   4篇
  2010年   3篇
  2009年   7篇
  2008年   6篇
  2007年   7篇
  2006年   4篇
  2005年   2篇
  2004年   12篇
  2003年   6篇
  2002年   4篇
  2001年   3篇
  2000年   3篇
  1999年   6篇
  1997年   5篇
  1996年   5篇
  1995年   6篇
  1994年   2篇
  1993年   4篇
  1992年   6篇
  1991年   6篇
  1990年   3篇
  1987年   3篇
  1986年   3篇
  1985年   3篇
  1984年   2篇
  1983年   2篇
  1981年   4篇
  1979年   3篇
  1978年   6篇
  1977年   4篇
  1976年   2篇
  1975年   12篇
  1973年   3篇
  1971年   2篇
  1969年   2篇
  1968年   3篇
  1967年   3篇
  1960年   2篇
  1957年   2篇
排序方式: 共有352条查询结果,搜索用时 15 毫秒
151.
152.
153.
154.
155.
From 1961 through 1966, the National Institutes of Health operated a facility for the rapid distribution of unevaluated preprints to research workers—an obvious precursor of many of the activities taking place today on the Internet. The experiment began with 32 researchers in a single Information Exchange Group (IEG). It grew to seven IEGs with total membership over 3600. During 1966, more than 1.5 million copies of preprints were produced and distributed. Considerable enthusiasm was generated among researchers who valued the speed of dissemination. Critics charged that the quality of the average preprint deteriorated with increased participation. They also noted that the unplanned burdens on production had often delayed receipt of the preprints until after they had appeared as formally reviewed journal papers. During this period, the Atomic Energy Commission had mounted a similar experimental program of “written informal communications” that was limited to theoretical high energy physics. Note: The NIH experiment ended as described by this summary, which was published inScience (154:843, 18 Nov. 1966). Obviously, no one wished to pay for it any longer. Despite the efforts of librarians at NIH, National Library of Medicine, and National Technical Information Services, we have not been able to locate the promised final report—A.H.  相似文献   
156.
In this study, we examined the effect of two metacognitive scaffolds on the accuracy of confidence judgments made while diagnosing dermatopathology slides in SlideTutor. Thirty-one (N = 31) first- to fourth-year pathology and dermatology residents were randomly assigned to one of the two scaffolding conditions. The cases used in this study were selected from the domain of nodular and diffuse dermatitides. Both groups worked with a version of SlideTutor that provided immediate feedback on their actions for 2 h before proceeding to solve cases in either the Considering Alternatives or Playback condition. No immediate feedback was provided on actions performed by participants in the scaffolding mode. Measurements included learning gains (pre-test and post-test), as well as metacognitive performance, including Goodman–Kruskal Gamma correlation, bias, and discrimination. Results showed that participants in both conditions improved significantly in terms of their diagnostic scores from pre-test to post-test. More importantly, participants in the Considering Alternatives condition outperformed those in the Playback condition in the accuracy of their confidence judgments and the discrimination of the correctness of their assertions while solving cases. The results suggested that presenting participants with their diagnostic decision paths and highlighting correct and incorrect paths helps them to become more metacognitively accurate in their confidence judgments.  相似文献   
157.
Eugene Garfield, Essays of an Information Scientist, Volume 3, 1977-78 (Philadelphia: ISI Press, 1980—$15.00)

The Information Society: An International Journal (Crane, Russak, 3 East 44th St., New York, N.Y. 10017– $48.00/quarterly)

M. Thomas Inge, ed. Handbook of American Popular Culture, Volume 2 (Westport, Conn.: Greenwood, 1980 —$29.95)

Information Resources: Knowledge and Power in the 21st Century by Anthony G. Oettinger (Incidental Paper 1-80-4, 10 pp. —$15.00)

Changes in the Information Industries– Their Strategic Implications for Newspapers by John C.Gates (Incidental Paper 1-80-5, 20 pp.—$15.00)

Economics and Postal Pricing Policy by Bruce Owen and Robert Willig (Publication P-81-2, 36 pp.—$30.00)

Factors Influencing Media Consumption: A Survey of the Literature by Christine Urban (Research Draft not yet for sale, March 1981, 107 pp.)

The Continuing Revolution in Communications Technology: Implications for the Broadcasting Business by Richard Rosenbloom (Incidental Paper 1-81-4, June 1981, 30 pp.—$15.00)

Information Resources Policy Viewed by an OutskIrten by Per Ongstad (Incidental Paper 1-81-5, July 1981, 53 pp.—$15.00)

Philip Hills, ed. The Future of the Printed Word: The Impact and Implications of the New Communications Technology (Westport, Conn.: Greenwood Press, 1981—$25.00)

Ronald J. Matlon, comp. Index to Journals in Communication Studies Through 1979 (Speech Communication Association, 5105 Backlick Rd., Annandale, Va. 22003—price not given, paper)  相似文献   
158.
COMMUNICATION TECHNOLOGY: THE NEW MEDIA IN SOCIETY by Everett M. Rogers (New York: Free Press, 1986—price not given, cloth and paper)

BEYOND THE GUTENBERG GALAXY: MICROCOMPUTERS AND THE EMERGENCE OF POST-TYPOGRAPHIC CULTURE by Eugene F. Provenzo, Jr. (New York: Columbia University/Teachers College Press, 1986—$8.95, paper)

UNDERSTANDING THE NEW TECHNOLOGIES OF THE MASS MEDIA by George E. Whitehouse (Englewood Cliffs, NJ: Prentice-Hall, 1986—$14.95, paper)

TELECOMMUNICATIONS IN THE INFORMATION AGE by Loy A. Singleton (Cambridge, MA: Ballinger, 1986—$19.95)

TELECOMMUTING: THE FUTURE TECHNOLOGY OF WORK by Thomas B. Cross and Marjorie Raizman (Homewood, IL: Dow Jones-Irwin, 1986—$25.00)

TELECOMMUNICATIONS TECHNOLOGY by R.L. Brewster (Chichester: Ellis Horwood Ltd./New York: John Wiley, 1986—price not given)

SATELLITE COMMUNICATIONS by Timothy Pratt and Charles W. Bostian (New York: John Wiley, 1986—$42.95)

UNDERSTANDING SATELLITE TELEVISION RECEPTION by S.E. Sutphin (Englewood Cliffs, N.J.: Prentice-Hall, 1986—price not given

1986 INTERNATIONAL SATELLITE DIRECTORY (Design Publishers, 369 Redwood Ave., Corte Madera, CA 94925—price not given, paper)

COMPUTERS AND COMMUNICATIONS: A VISION OF C&C by Koji Kobayashi (Cambridge, MA: MIT Press, 1986—$16.95)

DICTIONARY OF DATA COMMUNICATIONS edited by Charles J. Sippl (New York: Halstead Press/John Wiley, 1985—price not given, paper)  相似文献   
159.
Book review     

Handbook of telecommunications economics, volume I. structure, regulation & competition. Cave, M., Majumdar; S. & Vogelsang (eds.). Elsevier Science, B.V., 2002, 726 pages, ISBN 0–444–50389–7, www.elsevier.com

Cost proxy models and telecommunications policy. Farid Gasmi, D. Mark Kennett, Jean‐Jacques Laffont, William W. Sharkey. MIT Press: Cambridge, MA, 2002, 275 pages, ISBN 0–262–7237–8

Media institutions and audiences: Key concepts in media studies by Nick Lacey. MIT Press: Cambridge, MA, 2002, 275 pages, ISBN 0–262–7237–8. Palgrave, 2002, 235 pages, ISBN 0–333–65870–1, www.palgrave.com

Copyright in the cultural industries edited by Ruth Towse. Edward Elgar, 2002, 263 + xxii pages, ISBN 1–84064–661–6, www.e‐elgar.co.uk

Telecommunications management. Industry structures and planning structures. by Richard A. Gershon. 365 pages, ISBN 0–8058–3002–2, www.erlbaum.com

Understanding media economics by Gillian Doyle. Sage Publications, 2002, vii +184 pages, ISBN 07619 6874

Media and power by James Curran. Routledge, London and New York, 2002, 308 pages, ISBN 0–415–07740–0, www.routledge.com  相似文献   
160.
This three-wave e-mail/Web-based survey examined current perceptions of media sales representatives. Media departments from small, medium, and large advertising agencies across the United States answered questions related to the general perception, influence, and role of media sales representatives across media types. Overall, the findings suggested a favorable opinion about media sales representatives with magazine representatives rated as most influential. Trust emerged as a critical component in the buyer–seller relationship. In addition, providers of reliable knowledge and information were found to be critical roles of media sales representatives. The findings are noteworthy and emphasize the importance of educating industry sales representatives regarding the value of relationship building in the media sales process.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号