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   33篇
  免费   1篇
系统科学   15篇
理论与方法论   1篇
现状及发展   11篇
研究方法   3篇
综合类   3篇
自然研究   1篇
  2018年   1篇
  2017年   1篇
  2014年   1篇
  2013年   1篇
  2012年   1篇
  2011年   4篇
  2008年   2篇
  2007年   2篇
  2006年   1篇
  2004年   1篇
  2001年   3篇
  2000年   1篇
  1999年   2篇
  1993年   1篇
  1991年   5篇
  1990年   2篇
  1980年   2篇
  1978年   2篇
  1971年   1篇
排序方式: 共有34条查询结果,搜索用时 115 毫秒
31.
This paper, the second in a duology reporting on an action research project about public health services in Venezuela, presents a narrative of an intervention process launched on the basis of the conceptual framework presented in the first paper of the duology. Thereafter, a deeper reflection on such process, its meaning and its historical possibilities is presented. In this way a cycle of research-action-research is completed.  相似文献   
32.
This article is a summary of an interpretive-systemic study of the University of Los Andes in Venezuela. Following the methodological guidelines of interpretive systemology, three interpretive contextual systems were designed in order to comprehend the sense of the university. These three interpretive contexts were derived from possible different interpretations of the University Law (Statutes). Results obtained from the thematic interpretation of university activities and decision taking reveal an institution removed from any of the missions depicted in the interpretive contexts. A fourth interpretive context was designed to provide an interpretation of the regulative role the institution plays in order to maintain a particular social order and power structure. This fourth interpretive context shows greater interpretive power with regard to actual university activities than the other three.  相似文献   
33.
This is the second article in a trilogy devoted to inquiring about the historical meaning of the intimate link between a systems approach and world issues, so appropriate for Churchman's initial work on systems. After examining the logical relationship between modern systems thinking and world issues in the first article, in this second article the historical conditions for the formation of modern systems thinking are explored. It is shown how the intimate relationship between the will to systems and the notion of humanity gives full meaning, within the modern constellation, to Churchman's plea for a systems approach to world problems. However, in the light of this historical–ontological inquiry, systems thinking appears as both a propellant for the formation of the new constellation of modernity and a propellant for its destruction.  相似文献   
34.
Piperno DR  Weiss E  Holst I  Nadel D 《Nature》2004,430(7000):670-673
Barley (Hordeum vulgare L.) and wheat (Triticum monococcum L. and Triticum turgidum L.) were among the principal 'founder crops' of southwest Asian agriculture. Two issues that were central to the cultural transition from foraging to food production are poorly understood. They are the dates at which human groups began to routinely exploit wild varieties of wheat and barley, and when foragers first utilized technologies to pound and grind the hard, fibrous seeds of these and other plants to turn them into easily digestible foodstuffs. Here we report the earliest direct evidence for human processing of grass seeds, including barley and possibly wheat, in the form of starch grains recovered from a ground stone artefact from the Upper Palaeolithic site of Ohalo II in Israel. Associated evidence for an oven-like hearth was also found at this site, suggesting that dough made from grain flour was baked. Our data indicate that routine processing of a selected group of wild cereals, combined with effective methods of cooking ground seeds, were practiced at least 12,000 years before their domestication in southwest Asia.  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