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   13449篇
  免费   201篇
  国内免费   21篇
教育   9391篇
科学研究   1524篇
各国文化   125篇
体育   1149篇
综合类   6篇
文化理论   98篇
信息传播   1378篇
  2021年   139篇
  2020年   195篇
  2019年   268篇
  2018年   368篇
  2017年   351篇
  2016年   357篇
  2015年   238篇
  2014年   315篇
  2013年   2317篇
  2012年   294篇
  2011年   319篇
  2010年   279篇
  2009年   218篇
  2008年   267篇
  2007年   238篇
  2006年   232篇
  2005年   208篇
  2004年   229篇
  2003年   207篇
  2002年   175篇
  2001年   446篇
  2000年   292篇
  1999年   253篇
  1998年   118篇
  1997年   155篇
  1996年   132篇
  1995年   123篇
  1994年   144篇
  1993年   110篇
  1992年   181篇
  1991年   191篇
  1990年   194篇
  1989年   200篇
  1988年   165篇
  1987年   159篇
  1986年   168篇
  1985年   206篇
  1984年   161篇
  1983年   151篇
  1982年   128篇
  1981年   122篇
  1980年   116篇
  1979年   163篇
  1978年   131篇
  1977年   117篇
  1976年   92篇
  1975年   112篇
  1974年   100篇
  1973年   107篇
  1971年   98篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
Integration of multiple information systems of a medical center will change the way physicians work and practice medicine in the future. Several major steps must be taken by an institution to make this a reality. Since 1983, Georgetown has been engaged in an Integrated Academic Information Management System (IAIMS) project to bring together multiple sources of information that reside on different computers and database systems. Georgetown is developing a Biotechnology and Biomedical Knowledge Network that includes informational and clinical databases, scholar workstations, instruction on computer use, a campuswide network with local area network nodes, and a modular approach to systems integration. The IAIMS project, spearheaded by the medical library, has enabled a broad spectrum of health professionals to benefit directly from new, dynamic information services. The network is heavily used; in 1991, more than 2,100 individual users conducted more than 148,500 computer functions and more than 104,000 searches. There is economy of scale in high-volume use. Overall, the average search cost is $1.57; for high use databases the cost is $0.38, and for low use, it is $9.41. As described in this paper, IAIMS offers a cost-effective means of enhancing patient care by improving information services to physicians. At Georgetown, IAIMS has advanced the concept of integration, accelerated use of computers in education, increased user acceptance of advanced technologies, and established cost factors for providing information resources. While progress made in improving the transfer of medical information is impressive, it is clear that IAIMS requires several more years of support to achieve full implementation.  相似文献   
963.
This research was to determine whether the large differences in scores on the F scale found in previous studies (Bradburn, 1963; Kagitcibasi, 1970; Kinnis, 1977) were due to cultural differences in personality characteristics or due to differences in language and/or structure of measuring instruments.The subjects were three groups of university students from the United States and Turkey. The Turkish/English (T/E) sample attended a Turkish University where all classes were in English. The Turkish/Turkish (T/T) sample attended a Turkish University where all classes were in Turkish. The American/English (A/E) sample attended a Midwestern University.Each of the samples were administered three Scales measuring authoritarian personality characteristics. They were: Rokeach's (1960) Dogmatism scale (D scale) the standard F scale (Adorno et al., 1950) and a multiple choice format of the F scale called A scale (Neel, 1977). For the T/E and A/E subjects these scales were in English and for the T/T subjects in Turkish.For each cultural group the composite scores on each scale were obtained and used for inter-group comparisons through one-way analysis of variance (ANOVA). Within-group correlations across the three measures, the means and standard deviations of individual items and T tests were also computed. Interculture and language comparisons resulted in two significant differences on both the Dogmatism and F scales. Analysis of group, composite scales shows that these differences are due to disparities between the A/E and T/T culture/language groups. Differences across language and culture groups for the A scale were not significant. The A measure behaves differently from D and F for the two Turkish culture groups. For the A/E group, D, F, and A measures are almost undifferentiable. The results suggest the effect of measurement instruments on inter-cultural differences in inter-measure comparisons. This indicates a response format effect (agreer bias or acquiescence set).  相似文献   
964.
965.
966.
967.
Against a background of discussion about drafting of an ethical code for librarians and a review of articles confronting ethical issues in librarianship, the authors surveyed the 150 institutional members of the Health Science Librarians of Illinois (HSLI) regarding their perceptions of ethical concerns. Among the issues addressed in the survey are library organization, personnel policies, and professional competency, along with the traditional concerns of professional versus personal values, privacy and confidentiality, access to materials, and materials selection criteria in a health sciences context. Based on a 60% response rate, survey results indicate widespread agreement on some issues and a conspicuous lack of consensus on others. Further research is suggested in order to assess the need for a separate ethical code for health sciences librarians.  相似文献   
968.
The National Advisory Body was established to advise the Secretary of State for Education and Science on the allocation of money to support advanced work in polytechnics and colleges. The committee system of NAB was representative of local authority and college interests and there was always a tension between NAB and the Department of Education and Science. The paper charts the decisions that were taken by NAB in progressing the 1987–88 planning exercise. The policy context of these decisions is analysed and the political consequences are discussed. The paper argues that the 1987–88 exercise was the wrong approach to the planning problems and that the resulting conflict with the Government destroyed the credibility of NAB.  相似文献   
969.
970.
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