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   255篇
  免费   12篇
  2023年   2篇
  2022年   2篇
  2021年   2篇
  2020年   7篇
  2019年   13篇
  2018年   14篇
  2017年   21篇
  2016年   18篇
  2015年   8篇
  2014年   15篇
  2013年   56篇
  2012年   9篇
  2011年   8篇
  2010年   3篇
  2009年   6篇
  2008年   3篇
  2007年   5篇
  2006年   5篇
  2005年   4篇
  2004年   2篇
  2003年   5篇
  2002年   6篇
  2001年   7篇
  2000年   2篇
  1999年   3篇
  1998年   1篇
  1997年   5篇
  1995年   3篇
  1994年   2篇
  1993年   2篇
  1992年   1篇
  1988年   1篇
  1987年   4篇
  1986年   1篇
  1985年   1篇
  1984年   3篇
  1983年   1篇
  1982年   2篇
  1981年   1篇
  1980年   2篇
  1979年   1篇
  1977年   1篇
  1976年   2篇
  1975年   1篇
  1973年   2篇
  1972年   3篇
  1970年   1篇
排序方式: 共有267条查询结果,搜索用时 15 毫秒
181.
182.
183.
184.
The education sector has virtually disappeared from the Congolese state budget since the mid‐1980s. Yet schools have both managed to survive on school fees and to reproduce the public education sector, even though complete privatization would have been a realistic option. In this article, the authors understand this engagement with the state whilst simultaneously bending its rules as a negotiation strategy for better terms of inclusion in the state system. Different state actors cultivate their ‘own’ practical versions of official rules. In this way, they create space to respond to parents’ demand for education, to increase the number of teachers and their salaries far beyond what would otherwise have been possible, and to reproduce the system over time. One may wonder, however, whether the resilience of the sector in the face of the implosion of the state budget does not come at the price of building a more inclusive and higher quality education system.  相似文献   
185.
Implications of climate change for glacier tourism   总被引:2,自引:0,他引:2  
For more than 100 years, the Fox and Franz Josef Glaciers in Westland Tai Poutini National Park have attracted thousands of tourists annually and have emerged as iconic destinations in New Zealand. However, in recent years, the recession of both glaciers has been increasingly rapid and the impacts on, and implications for, visitor experiences in these settings remain relatively unexplored. A mixed-method approach was adopted to investigate visitor experiences and stakeholder perspectives through an assessment of climate-related changes on tourism at the glaciers in Westland Tai Poutini National Park. The bio-physical conditions at both the Franz Josef and Fox Glaciers were reviewed in order to assess the magnitude and rate of retreat. Perceptions of climate change risk and awareness of impacts in the National Park were assessed through stakeholder interviews (n = 13) and a visitor survey (n = 500) was used to better understand how impacts at these sites have affected and may continue to affect visitor experiences. Research results were reported to local communities via a series of public talks. Results revealed the fundamental importance of viewing the glaciers as a significant travel motive of visitors, suggesting that there is a ‘last chance’ dimension to their experience. Furthermore, the results demonstrate a high adaptive capacity of local tourism operators under rapidly changing environmental conditions. The implications of altered visitor experiences for tourism operators and protected area managers are discussed in light of these findings.  相似文献   
186.
The Pleistocene archaeological record of the Arabian Peninsula is increasingly recognized as being of great importance for resolving some of the major debates in hominin evolutionary studies. Though there has been an acceleration in the rate of fieldwork and discovery of archaeological sites in recent years, little is known about hominin occupations in the Pleistocene over vast areas of Arabia. Here we report on the identification of five new Middle Palaeolithic sites from the Nejd of central Arabia and the southern margins of the Nefud Desert to the north. The importance of these sites centers on their diversity in terms of landscape positions, raw materials used for lithic manufacture, and core reduction methods. Our findings indicate multiple hominin dispersals into Arabia and complex subsequent patterns of behavior and demography.  相似文献   
187.
188.
Showcasing stories of welfare beneficiaries in their own words, a recent Aotearoa (New Zealand)-based campaign called “We Are Beneficiaries” used social media to create a space of contestation to the widespread stigmatisation of poverty. While existing literature strongly emphasises the role played by traditional media in constructing and reinforcing stigma, and has more recently begun to explore resistance and contestation, relatively few accounts address efforts, like the We Are Beneficiaries campaign, that seek to destigmatise poverty stigma via social media. Accordingly, this paper argues that social media can serve as a counterpublic space for the destigmatisation of poverty. By discussing how the We Are Beneficiaries campaign refuted stigmatising narratives, critiqued institutions and sought to build solidarity among and with welfare beneficiaries, the paper draws attention to the potential of social media in the development of counterdiscourses as well as new political identities and claims-making.  相似文献   
189.
Lithic artifacts represent the most abundant cultural remains from Middle Stone Age sites in southern Africa. Of these, pointed forms (under a variety of names), blades, and flakes have long been recognized as the three most abundant general types, and retouch on all three is rare relative to similar forms of equivalent age elsewhere. Here we offer a new technique for documenting concentrations of edge damage on an assemblage level to infer taphonomic processes and to record usewear and retouch. This approach is specifically aimed at patterning on the assemblage scale, rather than on individual artifacts. We use points from a Middle Stone Age assemblage from Pinnacle Point Cave 13B, near Mossel Bay, South Africa, to illustrate the technique. Combining GIS, rose diagrams, and polar statistics, we were able to visually and statistically summarize lithic artifacts for patterns of edge damage. For the points made on quartzite in this assemblage, edge damage was found to be significantly patterned and taphonomic causes of the damage were rejected. The technique also opens avenues for many other quantitative analyses that are either impossible or difficult with current non-visual systems of recording, such as measurements of distance, angle, and area of edge damage.  相似文献   
190.
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