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   21篇
  免费   3篇
教育   11篇
科学研究   4篇
各国文化   1篇
信息传播   8篇
  2018年   1篇
  2017年   1篇
  2015年   1篇
  2013年   3篇
  2012年   1篇
  2011年   1篇
  2009年   2篇
  2006年   2篇
  2004年   2篇
  2002年   2篇
  1999年   1篇
  1994年   1篇
  1993年   1篇
  1991年   1篇
  1990年   1篇
  1988年   1篇
  1978年   1篇
  1948年   1篇
排序方式: 共有24条查询结果,搜索用时 171 毫秒
1.
2.
This article describes how the National Science Foundation's support of information research has evolved from NSF's original mission of improving the dissemination of scientific and technical information to its present interest in information robotics and intelligent systems. The pattern of grant support, since a major reorganization of the information science division in 1978, is analyzed in terms of the institutions, the investigators, and the disciplines that have been major grant recipients.  相似文献   
3.
The vast majority of American middle schools and high schools sell what is known as "competitive foods", such as soft drinks, candy bars, and chips, to children. The relationship between consumption of sugar-sweetened drinks and snacks and childhood obesity is well established but it remains unknown whether competitive food sales in schools are related to unhealthy weight gain among children. We examined this association using data from the Early Childhood Longitudinal Study Kindergarten Cohort. Employing fixed effects models and a natural experimental approach, we found that children's weight gain between 5(th) and 8(th) grades was not associated with the introduction or the duration of exposure to competitive food sales in middle school. Also, the relationship between competitive foods and weight gain did not vary significantly by gender, race/ethnicity, or family SES, and remained weak and insignificant across several alternative model specifications. One possible explanation is that children's food preferences and dietary patterns are firmly established before adolescence. Also, middle school environments may dampen the effects of competitive food sales because they so highly structure children's time and eating opportunities.  相似文献   
4.
5.
Conclusion Small presses are a colorful and wildly variegated lot. They offer materials on every imaginable topic to suit almost any taste and are springing up in towns and hamlets all over the country. New presses are being founded at a furious rate, though their ability to survive is as yet unknown. Clearly, many presses exist for other than purely commercial reasons. Our analysis suggests that only about a sixth of the 1700-odd publishers for which we have data are serious commercial enterprises; well over half, perhaps as many as two-thirds of them, exist for other reasons—personal interests, hobbies, or special causes.  相似文献   
6.
7.
结合我国<民法通则>和有关司法解释,就法人合伙的民事责任做了进一步探讨.  相似文献   
8.
运用分光光度法测定了来自浙江台州境内天台山不同生境的甜槠黄酮类化合物的含量并对其成分进行了聚酰胺薄层层析分析。结果表明,甜槠不同生境的叶片黄酮类化合物以冠层生境含量最高,灌丛生境次之,林下生境含量最低;林下生境的黄酮类化合物成分最少,而冠层生境的成分最多。  相似文献   
9.
The authors attempted to gain an understanding of critical incidents (CIs) from the perspective of novice counselor trainees during their 1st year of supervised clinical practicum. Journals kept by 9 trainees in master's‐level counseling programs were qualitatively analyzed using the discovery‐oriented research methodology (A. Mahrer, 1988). One hundred fifty‐seven CIs emerged in 5 major categories: (a) professional identity, (b) personal reactions, (c) competence, (d) supervision, and (e) philosophy of counseling. Implications of the findings are discussed for counselor development theory and research, as well as counselor training.  相似文献   
10.
In social work, it is believed that certain knowledge and skills are learned more effectively through experience than through didactic classroom content. Members of the faculty of a school of social work have developed a Social Action Day to reinforce curriculum and translate into practice material about advocacy and ethical responsibilities for social action; show the breadth of social work practice; and enhance the school's sense of community. The authors share their experience to inspire other social work faculty, so that they are better able to foster student interest and passion for political action that may generate social change.  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