全文获取类型
收费全文 | 1395篇 |
免费 | 12篇 |
国内免费 | 1篇 |
专业分类
教育 | 1116篇 |
科学研究 | 75篇 |
各国文化 | 14篇 |
体育 | 78篇 |
综合类 | 1篇 |
文化理论 | 9篇 |
信息传播 | 115篇 |
出版年
2020年 | 8篇 |
2019年 | 25篇 |
2018年 | 32篇 |
2017年 | 37篇 |
2016年 | 32篇 |
2015年 | 22篇 |
2014年 | 23篇 |
2013年 | 555篇 |
2012年 | 23篇 |
2011年 | 25篇 |
2010年 | 9篇 |
2009年 | 20篇 |
2008年 | 19篇 |
2007年 | 13篇 |
2006年 | 24篇 |
2005年 | 20篇 |
2004年 | 18篇 |
2003年 | 15篇 |
2002年 | 9篇 |
2001年 | 23篇 |
2000年 | 9篇 |
1999年 | 12篇 |
1998年 | 9篇 |
1997年 | 15篇 |
1996年 | 20篇 |
1995年 | 9篇 |
1994年 | 12篇 |
1993年 | 23篇 |
1992年 | 20篇 |
1991年 | 24篇 |
1990年 | 13篇 |
1989年 | 23篇 |
1988年 | 17篇 |
1987年 | 7篇 |
1986年 | 11篇 |
1985年 | 16篇 |
1984年 | 10篇 |
1983年 | 8篇 |
1982年 | 8篇 |
1981年 | 10篇 |
1980年 | 14篇 |
1979年 | 6篇 |
1978年 | 10篇 |
1977年 | 8篇 |
1976年 | 12篇 |
1974年 | 11篇 |
1973年 | 8篇 |
1969年 | 10篇 |
1968年 | 12篇 |
1967年 | 11篇 |
排序方式: 共有1408条查询结果,搜索用时 15 毫秒
981.
982.
983.
984.
985.
986.
987.
Funding incentives, collaborative dynamics and scientific productivity: Evidence from the EU framework program 总被引:1,自引:1,他引:0
In this paper we examine how incentives for collaboration shape collaborative behavior and researcher productivity in the context of EU-funded research networks. EU-funded research networks require researchers to collaborate as a condition for securing research funding. The presence of research funding, therefore, may influence collaborative behavior. Our approach involves isolating the effects of funding, collaboration and previous collaborations (prior to funding) on research output, and examining how the pattern of collaboration affects research productivity over time. Employing a panel of 294 researchers in 39 EU research networks over a 15-year period we find that while the impact of funding on productivity is generally positive the overall impact of collaboration within the funded networks is weak. When we delineate between pre-, during- and post-funding periods, however, we find some important differences. During the period of funding, collaboration did not lead to an increase in research production. In the post-funding period we find that although the number of collaborations decreases within the network, the impact of collaboration on productivity is positive and significant. Our findings suggest that collaborations formed to capitalize on funding opportunities, while not effective in enhancing researcher productivity in the short run, may be an important promoter of effective collaborations in the longer run. 相似文献
988.
Emilio Mordini David Wright Kush Wadhwa Paul De Hert Eugenio Mantovani Jesper Thestrup Guido Van Steendam Antonio D’Amico Ira Vater 《Ethics and Information Technology》2009,11(3):203-220
The ageing society poses significant challenges to Europe’s economy and society. In coming to grips with these issues, we
must be aware of their ethical dimensions. Values are the heart of the European Union, as Article 1a of the Lisbon Treaty
makes clear: “The Union is founded on the values of respect for human dignity…”. The notion of Europe as a community of values
has various important implications, including the development of inclusion policies. A special case of exclusion concerns
the gap between those people with effective access to digital and information technology and those without access to it, the
“digital divide”, which in Europe is chiefly age-related. Policies to overcome the digital divide and, more generally speaking,
e-inclusion policies addressing the ageing population raise some ethical problems. Among younger senior citizens, say those
between 65 and 80 years old, the main issues are likely to be universal access to ICT and e-participation. Among the older
senior citizens, say those more than 80 years old, the main issues are mental and physical deterioration and assistive technology.
An approach geared towards the protection of human rights could match the different needs of senior citizens and provide concrete
guidance to evaluate information technologies for them. 相似文献
989.
Hye Jeong Kim Heather R. Miller Bruce Herbert Susan Pedersen Cathy Loving 《Journal of Science Education and Technology》2012,21(4):440-452
In this study, a wiki was integrated into a professional development model that systemically addresses early-career teachers?? needs. This study was conducted to examine the impact of wiki-based professional development activities in a scientist-teacher professional learning community and focused on early-career teachers?? perceptions of the role of wiki technology and knowledge of teaching through inquiry. Teachers participated in the Professional Learning Community Model for Entry into Teaching Science (PLC-METS), a professional development program that is based on an integrated teacher education model of knowledge sharing, collaboration, and communication between teachers and scientists, with the goal of supporting early-career teachers?? ability to engage their students in scientific inquiry. The use of a wiki environment to collaborate on activities, deliver resources, and share knowledge is rapidly expanding in professional development communities. The use of the wiki in PLC-METS positively predicted the results of teachers?? knowledge of inquiry-based teaching. Results demonstrate that the wiki can contribute to building a learning community for collaboration between early-career science teachers and scientists. The paper also discusses the educational implications for the design of wiki-based professional learning communities that impact teachers?? professional development. 相似文献
990.
The importance of proximal-to-distal sequencing in human performance throwing has been reported previously. However, a comprehensive comparison of the proximal-to-distal sequence in team-handball throwing in athletes with different training experience and competition is lacking. Therefore, the aim of the study was to compare the ball velocity and proximal-to-distal sequence in the team-handball standing throw with run-up of players of different skill (less experienced, experienced, and elite). Twenty-four male team-handball players (n = 8 for each group) performed five standing throws with run-up with maximal ball velocity and accuracy. Kinematics and ball trajectories were recorded with a Vicon motion capture system and joint movements were calculated. A specific proximal-to-distal sequence, where elbow flexion occurred before shoulder internal rotation, was found in all three groups. These results are in line with previous studies in team-handball. Furthermore, the results of the present study suggest that in the team-handball standing throw with run-up, increased playing experience is associated with an increase in ball velocity as well as a delayed start to trunk flexion. 相似文献