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   76篇
  免费   1篇
  2023年   1篇
  2020年   2篇
  2017年   2篇
  2016年   6篇
  2015年   1篇
  2013年   31篇
  2012年   5篇
  2011年   2篇
  2010年   1篇
  2008年   1篇
  2007年   2篇
  2006年   1篇
  2005年   2篇
  2004年   1篇
  2003年   1篇
  2001年   1篇
  1999年   1篇
  1993年   2篇
  1991年   1篇
  1985年   1篇
  1984年   2篇
  1983年   2篇
  1982年   1篇
  1980年   1篇
  1977年   1篇
  1974年   2篇
  1972年   1篇
  1971年   1篇
  1969年   1篇
排序方式: 共有77条查询结果,搜索用时 15 毫秒
31.
32.
33.
American cities vary considerably in the degree to which they pursue sustainability. What explains this variation? One plausible cause of such differences is that sustainability may be more appealing to high‐income cities than to more economically challenged cities. Yet such strict economic determinism seems simplistic and removes politics from an inherently political process. The hypothesis here is that any such relationship between income and commitment to sustainability is conditioned by a city's level of environmental advocacy. The data utilized in this analysis are derived from two large‐scale data sources. One is a comprehensive inventory of sustainability programs and policies in 50 large American cities. The other is a set of surveys in those same 50 cities. The multivariate model supports the hypothesis. Controlling for income growth and the predisposition of policymakers to be supportive of sustainability (as well as other alternative explanations), a city's commitment to sustainability is strongly linked to the advocacy of environmental and sustainability groups in the policymaking process. The example of Sustainable Seattle is used to illustrate the linkages that would seem to underlie the statistical analysis.  相似文献   
34.
The Pacific coast of North America is ideally suited to the study of long-term developments in complex hunter-gatherer societies. This paper synthesizes current research in California and the Northwest Coast on three related research problems. The first concerns the timing, spatial distribution, and economies of the earliest coastal peoples in the region. The second problem involves the growth and florescence of complex Pacific hunter-gatherer societies. What constitutes archaeological evidence of hunter-gatherer complexity, when and where it occurs, and the interpretations proposed to account for it are reviewed. The final problem addresses how complex hunter-gatherer peoples responded to European exploration and colonization, and how these early encounters affected the Pacific coast societies recorded in early ethnohistoric accounts and later studied by ethnographers.  相似文献   
35.
36.
37.
38.
Kate O'Brien wrote Pray for the Wanderer (1938) as a riposte to the Irish Censorship of Publications Board for the banning of her novel Mary Lavelle (1936). While Irish writers routinely fell afoul of the government, Pray for the Wanderer stands alongside only Liam O'Flaherty's The Puritan (1932) as a novelistic response to censorship. However, despite the historical importance of these two books to Irish Studies, there has been very little of substance written on either of them. It has instead become a short-hand method of discussing censorship for scholars to simply gesture towards these works and their authors as exemplary. In the end, this approach does nothing to enhance our understanding of how censorship functions, the contentious debates it engenders, or the social nature of such a text. The article addresses these lacunae by examining Pray for the Wanderer as a critique of censorship. By setting the novel alongside contemporary press reports and editorials, the article demonstrates that while the book might be critical of censorship and its effects on artists, there is much in it that undermines the anti-censorship position it purportedly takes.  相似文献   
39.
Extraction of protein residues from archaeological matrices, such as pottery clay, lithics, and grinding stones, has proven to be methodologically challenging. Protein residue analysis is fraught with technical challenges in analytical chemistry. In cooking pottery, protein residues are thought to bind to clay surfaces in vessel walls through a variety of primarily non-covalent interactions. Removal of protein residues requires the disruption of these interactions, and a diverse set of tools has been proposed and applied. Here, we test extraction procedures through varying combinations of physical parameters and solvents to derive an optimal approach yielding efficiencies of recovery from experimental pottery above 60%. The utility of our extraction approach was further validated through liquid chromatography?Cmass spectrometry analysis of experimental residues. We have identified several hurdles to developing a successful study of protein residues from pottery, each of which is surmountable with additional method development in the realm of archaeological chemistry.  相似文献   
40.
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