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   358篇
  免费   24篇
  382篇
  2023年   3篇
  2022年   5篇
  2021年   2篇
  2020年   15篇
  2019年   15篇
  2018年   12篇
  2017年   15篇
  2016年   18篇
  2015年   10篇
  2014年   18篇
  2013年   46篇
  2012年   18篇
  2011年   24篇
  2010年   19篇
  2009年   12篇
  2008年   19篇
  2007年   16篇
  2006年   14篇
  2005年   12篇
  2004年   14篇
  2003年   10篇
  2002年   7篇
  2001年   3篇
  2000年   5篇
  1999年   3篇
  1998年   5篇
  1997年   1篇
  1995年   2篇
  1994年   1篇
  1993年   5篇
  1992年   3篇
  1991年   1篇
  1989年   1篇
  1988年   1篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1984年   3篇
  1983年   3篇
  1982年   4篇
  1981年   2篇
  1979年   1篇
  1978年   1篇
  1977年   3篇
  1975年   1篇
  1974年   2篇
  1973年   1篇
  1972年   1篇
  1971年   1篇
  1969年   1篇
排序方式: 共有382条查询结果,搜索用时 15 毫秒
241.
242.
This paper focuses on the contribution of meta-regulation in responding to the regulatory needs of a field beset by significant uncertainties concerning risks, benefits and development trajectories and characterised by fast development. Meta-regulation allows regulators to address problems when they lack the resources or information needed to develop sound “discretion-limiting rules”; meta-regulators exploit the information advantages of those actors to be regulated by leveraging them into the task of regulating itself. The contribution of meta-regulation to the governance of nanotechnologies is assessed in terms of responsibilisation. Responsibilisation is regarded as a pre -requisite for regulatory actors to internalise social values (such as consumer safety and occupational health) and to ensure that these values are built into regulatory practice. In order to explore the potential of responsibilisation, the Code of Conduct for Responsible Nanosciences and Nanotechnologies Research launched by the European Commission in 2008 is evaluated. The Code is a good case of meta-regulation that aims to steer the self-regulation of nanotechnological business and research organisations. The paper concludes that, while efforts were made on the part of meta-regulators and self-regulators to contribute to responsibilisation, important opportunities for responsibilisation such as dissemination and promotion of the Code, trust-building activities, and failure to provide rewards, incentives and stakeholder guidance were not taken up. In order to foster responsibilisation within the meta-regulatory instrument of the EC Code, a number of crucial activities to be undertaken by meta-regulators are recommended.  相似文献   
243.
An important problem verb learners must solve is how to extend verbs. Children could use cross-situational information to guide their extensions; however, comparing events is difficult. In 2 studies, researchers tested whether children benefit from initially seeing a pair of similar events (“progressive alignment”) while learning new verbs and whether this influence changes with age. In Study 1, 2.5- and 3.5-year-old children participated in an interactive task. Children who saw a pair of similar events and then varied events were able to extend verbs at test and differed from a control group; children who saw 2 pairs of varied events did not differ from the control group. In Study 2, events were presented on a monitor. Following the initial pair of events that varied by condition, a Tobii x120 eye tracker recorded 2.5-, 3.5-, and 4.5-year-olds’ fixations to specific elements of events (areas of interest) during the 2nd pair of events, which were the same across conditions. After seeing the pair of events that were highly similar, 2.5-year-olds showed significantly longer fixation durations to agents and to affected objects as compared with the all-varied condition. At test, 3.5-year-olds were able to extend the verb, but only in the progressive alignment condition. These results are important because they show children’s visual attention to relevant elements in dynamic events is influenced by their prior comparison experience, and they show that young children benefit from seeing similar events as they learn to compare events to each other.  相似文献   
244.
245.
246.
247.
Land-based climate mitigation schemes such as REDD+ imply the creation of ‘rights to carbon’ for actions that enhance carbon sinks. In many cases, the legal and normative foundations of such rights are unclear. This article focuses on special rights on the basis of improvement. Considering improvement in relation to carbon sinks requires asking what it means to ‘improve’ an environmental resource. Our answer departs in two significant respects from the standard conception of improvement, namely by reconceiving action in relation to ecosystem services, and accordingly, making the case for a counterfactual baseline to be used to compare an improved and unimproved state. Our modifications potentially allow for a variety of agents to claim special carbon rights on the basis of beneficial interactions with land-based carbon sinks. We give three archetypical examples of agents who may claim pro tanto special rights to carbon based on their interaction with carbon sinks.  相似文献   
248.
249.
There is significant disagreement among feminists and liberals about the compatibility between the two doctrines. Political liberalism has come under particular criticism from feminists, who argue that its restricted form of equality is insufficient. In contrast, Lori Watson and Christie Hartley argue that political liberalism can and must be feminist. This article raises three areas of disagreement with Watson and Hartley’s incisive account of feminist political liberalism. First, it argues that an appeal to a comprehensive doctrine can be compatible with respecting others, if that appeal is to the value of equality. Second, it takes issue with Watson and Hartley's defence of religious exemptions to equality law. Third, it argues that political liberalism can be compatible with feminism but that it is not itself adequately feminist. It concludes that political liberalism is not enough for feminists.  相似文献   
250.
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