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   10056篇
  免费   124篇
  国内免费   122篇
教育   6395篇
科学研究   1230篇
各国文化   89篇
体育   1630篇
综合类   19篇
文化理论   66篇
信息传播   873篇
  2021年   79篇
  2020年   155篇
  2019年   199篇
  2018年   279篇
  2017年   279篇
  2016年   261篇
  2015年   182篇
  2014年   233篇
  2013年   1553篇
  2012年   211篇
  2011年   223篇
  2010年   190篇
  2009年   208篇
  2008年   189篇
  2007年   180篇
  2006年   198篇
  2005年   170篇
  2004年   379篇
  2003年   349篇
  2002年   335篇
  2001年   400篇
  2000年   240篇
  1999年   162篇
  1998年   106篇
  1997年   97篇
  1996年   96篇
  1995年   107篇
  1994年   101篇
  1993年   77篇
  1992年   152篇
  1991年   118篇
  1990年   135篇
  1989年   149篇
  1988年   110篇
  1987年   129篇
  1986年   120篇
  1985年   135篇
  1984年   119篇
  1983年   123篇
  1982年   96篇
  1981年   81篇
  1980年   90篇
  1979年   134篇
  1978年   87篇
  1977年   72篇
  1976年   89篇
  1975年   65篇
  1974年   72篇
  1973年   68篇
  1971年   66篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
951.
School policy on teaching and the school learning environment (SLE) are the main school factors of the dynamic model of educational effectiveness (Creemers & Kyriakides, 2008 Kyriakides, L. and Tsangaridou, N. 2008. Towards the development of generic and differentiated models of educational effectiveness: A study on school and teacher effectiveness in physical education. British Educational Research Journal, 34: 807838. [Taylor & Francis Online], [Web of Science ®] [Google Scholar]). A longitudinal study in which 50 primary schools, 108 classes, and 2369 students participated generated evidence supporting the validity of the dynamic model. This article reports the results of a re-analysis of the data of this study in order to search for direct and indirect effects of school factors included in the model. Using multilevel structural equation modelling techniques, indirect effects of school policy on teaching and SLE upon achievement in mathematics and Greek language are demonstrated. Implications of findings are drawn. Comparing the results of the multilevel direct and indirect effect model with those from using a multilevel regression model, we demonstrate the importance of choosing appropriate conceptual models and using relevant methodological approaches to understand the dynamic nature of educational effectiveness.  相似文献   
952.
Worldwide serious reservations are being expressed about the ability and competency of the public sector to deliver agricultural extension services, especially in developing countries such as Pakistan which is faced with serious financial difficulties. Consequently, the government is looking for alternative extension paradigms that are cost-effective and client-oriented. To this end the government of Pakistan is inclined towards privatizing the provision of agricultural extension services as a means to promote a second ‘Green Revolution’. This study was conducted among cotton farmers in the Punjab Province to examine the comparative effectiveness of public and private sector extension as perceived from the stakeholders. Data were collected from 52 contact farmers of both extension systems. A number of biases were identified in both systems; namely, a preference for farmers with better education and larger landholdings than their noncontact farmer counterparts. Overall, neither system appears to be working for the benefit of the wider farming community.  相似文献   
953.
954.
955.

This article reports on how young women in Hong Kong relate to the penis. A total of nine focus group interviews were conducted at the University of Hong Kong to enable participants to reflect on and talk about their 'experience of the penis'. It is found that despite society's various attempts to restrict their access to the penis, it is very much present and available to the young women in Hong Kong. While most of the participants reported the normative response of disgust, which was expected as part of the 'proper femininity', positive experiences of the penis characterised by agency, mastery and fulfilment were also reported. Some of the things they do, such as watching an exhibitionist or actively consuming sexually explicit materials and pornography, subvert the discursive practice of positioning women as passive sexual objects. It is believed that with more open access to knowledge and experience, women will stand a better chance of achieving a more agentive relationship, not only with the penis as a potential transitional object in intimate relationships, but also with their own sexuality.  相似文献   
956.
Newspapers are recognised as a major source of factual information. The media representation of issues related to teenage pregnancy is important to policy makers and those delivering related interventions. This is particularly so in relation to issues which may be seen as sensitive by the public, such as sex and relationship education (SRE). Despite general recognition of the importance of the media in communicating to the public, there is an absence of satisfactory tools with which to evaluate newspaper reports, particularly so in the field of SRE. In this paper we present a systematic examination of newspaper articles related to SRE from September 2000 to September 2002, in the national and regional press in England. Our analysis has highlighted some important distinctions between newspaper type, spokesperson and region. This paper concludes that a pro‐active strategy of directly contacting high circulation newspapers with a view to positively influencing the tone of relevant articles and reports would be of considerable benefit to those involved in SRE, teenage pregnancy and related interventions.  相似文献   
957.
The key to agricultural development in the eastern region of India, where problems of excess water and water scarcity coexist, is the scientific management of water resources with the adoption of recommended water-management technologies. A vast networking of infrastructure for the development and dissemination of water- management technologies have been designed since the very inception of planned economic change. Despite these concerted efforts, a large number of recommended technologies are either being adopted in piece-meal or not at all. The research and extension systems have been generating and disseminating technologies, therefore, it was felt worthwhile to assess the feasibility and appropriateness of recommended tecnologies as perceived in the first instance by the personnel of the research system and followed by the extension personnel. These steps were felt to be a precursor to screen the recommended technologies for their dissemination and evaluation in different farming systems. The assessment of recommended water-management technologies was performed after their documentation from different organisations working in the field of water management in two eastern India states viz. Orissa and West Bengal. The perception of 30 personnel members of the research system regarding the feasibility of these technologies elucidated that out of 86 documented recommended water-management technologies, 40 were having feasibility scores of ≥ 4.0; 8 technologies with score £ 3.0 and the rest of the 38 technologies with a score between 3.0 and 4.0 on a feasibility continuum range from 1.0 (not feasible) to 5.0 (highly feasible). Out of 40 recommended technologies (already assessed as highly feasible by the research personnel), extension personnel have perceived 16 and 10 technologies as highly appropriate and feasible, respectively. While six and four technologies were found to be less appropriate and feasible, respectively. Correlation of all nine indicators of appropriateness with feasibility of technologies was significant. Five indicators of appropriateness viz. simplicity, physical compatibility, production sustainability, cultural compatibility and cost together constituted 36.8 per cent of the total variation in feasibility with the ‘t’ values and ‘F’ values being significant. It indicates that not appropriateness of technologies alone but other factors influence the feasibility of technologies.  相似文献   
958.
Abstract

Purpose: The purpose of this study was to identify and rank the SWOT issues of India's veterinary and animal science education.

Design: The data were collected at the Indian Veterinary Research Institute (IVRI) from 168 post-graduate students. The two surveys generated 72% (N=121) and 68% (N=114) response rates, respectively. In the first stage, the vital SWOT issues were listed by respondents and in the second stage, they ranked the top eight issues on a Likert scale.

Findings: Uniform curriculum; merit-based admissions; and huge demand and employment prospects were perceived as major strengths. Gaps in curriculum revision and inadequate faculty, colleges and hands-on experience were perceived as key weaknesses. Regular curriculum revisions; novel instructional methods; and single admission tests were important opportunities perceived. Out-dated education model; urban biased admissions; and regional barriers were the major threats perceived.

Practical implication: The SWOT issues identified are similar to those faced by veterinary education programmes in many countries with minor variations.

Originality/value: The findings are of interest for veterinary faculties in developing and under-developed countries to harmonize their veterinary education systems on par with global norms. The related implications for policy and future directions are discussed.  相似文献   
959.
Abstract

The study focused on constraints affecting the utilization of Information and Communication Technologies (ICT) for agricultural extension activities by Agricultural Extension Officers in Nigeria's Niger Delta Region. Data were derived from 160 extension officers affiliated to both public and private extension organizations in four states of the Niger Delta. Findings revealed important specific constraints to include: poor ICT infrastructure development, high cost of broadcast equipment, high charges for radio/television presentations, high cost of access/interconnectivity and electricity power problems. The use of Factor Analysis aided to crystallize identified constraints into three factors of ‘poor enabling environment’, ‘lack of access’ and ‘dissemination of unrelated information’. Against the background of several national government initiatives to develop the infrastructure base of the country, recommendations are proffered to ameliorate ICT use constraints.  相似文献   
960.
Abstract

Purpose: The study evaluated how farmer acquisition, sharing and use patterns of information and knowledge interact with different socioeconomic factors to influence integrated soil fertility management (ISFM) technology uptake.

Design/methodology/approach: The study was conducted as part of an evaluation of field-based farmer learning approaches introduced by SOFECSA in Zimbabwe. Building on emerging farmer interactive platforms, data were collected using farmer participatory research approaches.

Findings: Over 90% of the farmers identified the national extension agents as the farmers' most preferred and reliable sources of information on ISFM, with farmer-to-farmer interactions ranking second. Non-governmental organisations and the print media emerged as the least trusted sources of agricultural technical information. Field-based learning centres, which enabled interactive evaluation of different ISFM options, constituted ~50%, indicating that they were major platforms for information and knowledge sharing. Uptake of ISFM was influenced by farmer resource group and farmers' visits to learning centres. Farmer experience and access to extension services were, in turn, the major factors influencing farmers' use of ISFM information. Approaches that support farmer-to-farmer interactions are required and learning centres are a suitable platform for such interactions to occur.

Practical implications: The article brings to attention the role of learning centres in fostering adoption of ISFM technologies. Insights on the need to support and strengthen agricultural extension in rural smallholder communities are provided.

Originality/value: This is a unique study exploring the role of farmer-oriented information and knowledge management in promoting complex technologies such as ISFM. A new dimension on the demands of new approaches for information dissemination to enhance knowledge sharing is presented.  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