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   314篇
  免费   29篇
  2023年   6篇
  2022年   3篇
  2021年   2篇
  2020年   8篇
  2019年   18篇
  2018年   31篇
  2017年   29篇
  2016年   24篇
  2015年   8篇
  2014年   12篇
  2013年   84篇
  2012年   12篇
  2011年   11篇
  2010年   12篇
  2009年   17篇
  2008年   8篇
  2007年   5篇
  2006年   7篇
  2005年   2篇
  2004年   5篇
  2003年   3篇
  2002年   6篇
  2001年   5篇
  2000年   1篇
  1999年   3篇
  1998年   3篇
  1997年   3篇
  1996年   2篇
  1995年   2篇
  1992年   4篇
  1991年   1篇
  1989年   1篇
  1988年   1篇
  1984年   1篇
  1981年   1篇
  1979年   1篇
  1975年   1篇
排序方式: 共有343条查询结果,搜索用时 15 毫秒
71.
72.
73.
The archaeological remains of ships in the beach zone are part of a complex and dynamic system. Being periodically exposed and reburied, they vary between being both visible and frequently forgotten features of the physical and cultural coastal landscape. These limited and non-renewable resources are highly susceptible to instability within the landscape. Challenges to stability result in these resources being damaged, ignored, or forgotten, leading to a potential loss of pertinent social, economic, and physical information. Although little can be done to prevent certain physical actions, a better understanding of physical and cultural processes allows for their mitigation and better management practices for the beached shipwreck resource. This paper looks at how stability is defined in relation to beached shipwreck sites and how these definitions impact the management of the resource of two case study sites in Maine and North Carolina.  相似文献   
74.
The United States Department of Agriculture Forest Service traditionally has been dominated by white, male for esters, particularly in its professional and leadership ranks. Beginning in the mid-1970s, however, civil rights legislation, lawsuits, and statutes that mandated interdisciplinary planning collectively impelled the agency to begin diversifying by race, gender, and profession. This study attempts to quantify the progress the agency has made in workforce diversification since the early 1980s by grouping Forest Service job series into categories and tracking changes in these categories over time. The study reveals that the numbers of employees in “nontraditional” Forest Service fields (e.g., the social and biological sciences) increased markedly, but that these employees remain vastly outnumbered by employees in traditional fields such as forestry. The number of women in the agency also increased greatly, but women made much greater gains in administrative support positions than in jobs that put them in the pipeline for leadership positions. They remain vastly overrepresented in clerical and administrative positions and highly under rep resented in professional and technical positions. People of color made gains in nearly all job categories, but, like women, remain significantly overrepresented in jobs that will not lead to leadership positions. Thus, while aggregate numbers show greater diversity in the Forest Service workforce, a more detailed analysis reveals that the leadership ranks are still the domain of white, male foresters.  相似文献   
75.
76.
Facing challenges to the civic purpose of higher education, some scholars and administrators turn to the rhetoric of engagement. Simultaneously, the political philosophy of cosmopolitanism has gained intellectual favor, advocating openness to the lived experiences of distant others. We articulate linkages between these two discourses in an extended case study, finding that a cosmopolitan ethos of engagement in a rural context can improve (1) understanding among people ordinarily separated by spatialized social‐ecological differences, (2) prospects for longer term environmental sustainability, and (3) the visionary potential of collaborative inquiry. Despite globalization of food systems and neoliberal shifts in fishery management, an annual fisheries forum facilitates coalitions that overcome dichotomies between technocratic and local knowledge, extending benefits to fishing communities, academia, and public policy. Iterative and loosely structured capacity building expands informally through affective processes of recognition and care, as decentralized leadership supports collective mobilization toward alternate futures.  相似文献   
77.
78.
This paper summarizes phytolith analyses from four pre-Columbian agricultural raised-field sites of the coastal savannahs of French Guiana—Savane Grand Macoua, Piliwa, Bois Diable and K-VIII—and carbon isotope analyses from the first-named site. The combined phytolith and 13C isotope analyses evidence the transformation of the landscape from a relatively homogeneous wetland vegetation comprised of a mixture of C4 and C3 plants (the latter including Cyperaceae and other herbaceous monocots such as Marantaceae and Heliconia, Oryzoideae grasses, and other plants typical of frequently flooded areas) to the construction of raised fields that were dominated by C4 plants (maize and other Panicoideae grasses). Our analysis proves the utility of phytoliths for tracing the agricultural history of landscapes, showing that, as in other parts of the Central and South American lowlands, maize (Zea mays) was one important crop cultivated in raised fields. We also estimated the productivity of raised-field agriculture, showing that in combination with other subsistence activities, it certainly had the capacity to sustain sizeable populations.  相似文献   
79.
This article mobilizes a feminist analytic to examine team research and collaborative knowledge production. We center our encounter with team research – a collectivity we named ‘Team Ismaili’ – and our study with first- and second-generation East African Shia Ismaili Muslim immigrants in Greater Vancouver, Canada. We draw upon feminist politics to highlight the ways in which ‘Team Ismaili’ at once destabilized and unwittingly reproduced normative academic power relations and lines of authority. A ‘backstage tour’, of ‘Team Ismaili’ shows the messiness and momentum of team research and sheds light on how collaborative knowledge production can challenge and reconfirm assumed hierarchies. Even as we are still methodologically becoming, through this discussion we strive to interrupt the prevailing silence on team research in human geography, to prompt more dialogue on collaboration and to foreground the insight garnered through feminist politics.  相似文献   
80.
After two decades of scholarship on ‘critical geopolitics’, the question of whether it is largely a discursive critique of prevailing knowledge production and geopolitical texts or critique with an implicit, normative politics of its own remains open. These positions are not incommensurate, and much scholarship on critical geopolitics does both. This paper analyzes critical geopoliticians' concern with this question in the present historical moment and probes the possibility of a post-foundational ethic as the basis for ‘the political’ in critical geopolitics and beyond. Empirically, this paper explores these theoretical tensions within ‘critical geopolitics’ by tracing the disparate fates of two young men, both child soldiers at the time of their capture. ‘Child soldier’ is an unstable category subject to geopolitical valence and stigma during the ‘war on terror’. The deployment of extra-legal tactics and spaces of violence, such as those faced by detainees at Guantanamo Bay, point to the rise of biopolitics combined with geopolitics, illustrating the intersection of sovereignty and governmentality as important political fodder for critical geopolitics two decades after its inception. The stories of Canadian Omar Khadr, one of the youngest prisoners at Guantanamo and the only citizen of a Western state still held there, and Ismael Beah, a rehabilitated soldier who fought as a boy from Sierra Leone, illustrate too how geographical imagination strongly shapes access to provisions of international law and the victimized status of ‘child soldier’ in particular.  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