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   610篇
  免费   8篇
教育   455篇
科学研究   36篇
各国文化   11篇
体育   48篇
文化理论   2篇
信息传播   66篇
  2022年   4篇
  2020年   5篇
  2019年   22篇
  2018年   25篇
  2017年   27篇
  2016年   25篇
  2015年   17篇
  2014年   17篇
  2013年   144篇
  2012年   13篇
  2011年   19篇
  2010年   6篇
  2009年   17篇
  2008年   13篇
  2007年   5篇
  2006年   15篇
  2005年   12篇
  2004年   12篇
  2003年   10篇
  2002年   6篇
  2001年   19篇
  2000年   4篇
  1999年   8篇
  1998年   3篇
  1997年   11篇
  1996年   12篇
  1995年   8篇
  1994年   5篇
  1993年   5篇
  1992年   9篇
  1991年   13篇
  1990年   7篇
  1989年   6篇
  1988年   8篇
  1987年   2篇
  1986年   7篇
  1985年   6篇
  1984年   4篇
  1983年   4篇
  1981年   7篇
  1980年   9篇
  1979年   2篇
  1978年   4篇
  1977年   3篇
  1976年   5篇
  1975年   2篇
  1974年   4篇
  1973年   5篇
  1968年   2篇
  1934年   2篇
排序方式: 共有618条查询结果,搜索用时 62 毫秒
121.
The use of R&D grants as a policy instrument has been motivated by economic arguments of market failure. Neo-classical econometric studies have analysed the additionality of one Euro of subsidies on both the investments of companies in the R&D process and the output of that R&D process. More recently, behavioural additionality has been launched as a third form of additionality. In contrast to input and output additionality, behavioural additionality is related to changes in the processes that take place within the firm. In this paper, we analyse the determinants of the behavioural additionality of R&D grants. To explain the mechanism through which behavioural additionality is obtained, we use organizational learning theory as a guide to formulate our hypotheses. Hypotheses are tested using a telephone survey of 192 recipients of R&D grants provided by the IWT in Flanders in 2001–2004, matched to a sample of 84 firms that undertake innovation activities but which had never had a grant bid accepted. We find that congenital learning and interorganizational learning lead to increased behavioural additionality. However, these learning effects decrease with the number of subsidized projects that are undertaken by the company.  相似文献   
122.
Background:Prior to 2020, library orientation for first-year medical students at Weill Cornell Medicine took the form of an on-site treasure hunt competition. Due to the COVID-19 pandemic, the orientation for the MD class of 2024 was shifted to an all-virtual format. This shift mandated a full redesign of the library orientation.Case Presentation:The Samuel J. Wood Library sought to preserve the excitement and fun of the treasure hunt in the new virtual format. The competition was redesigned as a Zoom meeting using breakout rooms, with library faculty and staff serving as team facilitators. Tasks were rewritten, shifting the focus from the library''s physical spaces to its virtual services and online resources. The redesigned orientation was evaluated using two data sources: a postsession survey of student participants and a debriefing of the library employees who participated. Student evaluations were positive, while the faculty and staff provided numerous suggestions for improving future virtual orientations.Conclusions:A successful virtual library orientation requires careful preparation, including testing the competition tasks, full rehearsal with library facilitators, and a thoughtful approach to technology and logistics. We have chosen to share the materials we developed for other academic health sciences libraries that may wish to take a similar approach to their own virtual orientations.  相似文献   
123.
124.
125.
Interdisciplinary research is frequently viewed as an important component of the research landscape through its innovative ability to integrate knowledge from different areas. However, support for interdisciplinary research is often strategic rhetoric, with policy-makers and universities frequently adopting practices that favour disciplinary performance. We argue that disciplinary and interdisciplinary research are complementary, and we develop a simple framework that demonstrates this for a semi-permanent interdisciplinary research field. We argue that the presence of communicating infrastructures fosters communication and integration between disciplines and the interdisciplinary research field to generate innovative knowledge. We apply this to the experience of economic history in Australia in the second half of the twentieth century to demonstrate the life cycle of a semi-permanent interdisciplinary research field.  相似文献   
126.
The PPVT-R and the WISC-R were administered to a sample of 35 students, grades 1 through 8, who were nominated for possible participation in gifted programming. The correlation between the PPVT-R and Full Scale IQ was .27, which probably was affected by the restricted range of ability assessed. The PPVT-R showed modest incremental effectiveness beyond informal referral procedures in predicting toward a WISC-R criterion score.  相似文献   
127.
Correlations of WPPSI IQs with concurrently administered subtests from the WRAT were compared with analogous WISC-R/WRAT correlations in a group of children referred by regular classroom teachers for school psychological services. Although the magnitudes of all correlations were reduced, due to restriction of range, the comparisons indicated no significant differences in the magnitudes of the correlations of the WPPSI and the WISC-R with the WRAT. These results support the use of the two instruments as equivalent predictors of achievement.  相似文献   
128.
129.
OBJECTIVE: There has been relatively little attention given to positive adaptation following childhood sexual abuse (CSA), and typically such resilience has been explored primarily in the intrapersonal domain. This study explored questions about later resilience following CSA within a multidimensional framework by assessing resilience across intrapersonal, interpersonal, and intrafamilial domains. METHOD: This community sample consisted of 79 mothers with a history of CSA who had a child living at home with them. Participants completed four outcome measures (Center for Epidemiologic Studies--Depression Scale, Parenting Stress Index [PSI] Health Scale, PSI Parenting Competence Scale, and a measure of marital satisfaction). Risk and protective factors examined in relation to outcome included mother's age, socioeconomic status, severity of the CSA experience, coping strategy (avoidance, seeking social support, and problem solving), child characteristics, and spousal/partner support. RESULTS: Results indicated that when multiple adaptational domains were assessed, mothers showed discrepancies in how adequately they functioned across domains. While severity of the CSA experience was only weakly associated with outcome, use of avoidant coping emerged as a significant risk factor and was strongly and consistently associated with negative outcome across domains. Spousal/partner support was a strong protective factor and buffered the relationship between depressive symptoms and parenting competence. Difficult child characteristics were significantly associated with mothers' perceptions of physical health and parenting competence. CONCLUSIONS: The findings suggest the importance of comprehensive multimethod assessments of resilience and extend the knowledge of factors associated with positive outcome. The results highlight the need for further research exploring current contextual risk and protective factors associated with resilience in each domain.  相似文献   
130.
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