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   96篇
  免费   3篇
  99篇
  2023年   2篇
  2021年   1篇
  2020年   1篇
  2019年   5篇
  2018年   4篇
  2017年   5篇
  2016年   3篇
  2015年   2篇
  2014年   4篇
  2013年   34篇
  2012年   3篇
  2011年   1篇
  2010年   1篇
  2009年   4篇
  2008年   3篇
  2007年   1篇
  2006年   3篇
  2005年   1篇
  2003年   1篇
  2002年   3篇
  2001年   2篇
  2000年   1篇
  1999年   1篇
  1998年   1篇
  1996年   2篇
  1992年   1篇
  1990年   1篇
  1987年   1篇
  1984年   1篇
  1983年   1篇
  1982年   2篇
  1973年   2篇
  1952年   1篇
排序方式: 共有99条查询结果,搜索用时 15 毫秒
11.
12.
While total global forest cover is decreasing, in many parts of the world forests are on the rebound. Uncritical examinations of this phenomenon credit the benign diffusion of capitalist development for this "forest transition." More critical readings of this question—including green Marxian and poststructuralist approaches—might conclude something very different, however. In this paper, we explore the question of expanding forest cover, using the case of the Scottish Highlands, where forestland has tripled since the 1920s, in an attempt to critically explain regional land–cover change. Drawing upon historical sources and Scottish Executive and Forestry Commission data, we examine the specific environments currently forming in the Highlands under conditions of economic change. We conclude that two divergent forestry practices and ecologies have been formed in the wake of economic restructuring: those geared towards industrial production and those targeted at consumption through ecotourism. We conclude, therefore, that capitalism's spatial fix to declining industrial power in the region is an inherently ecological one that takes the form of "schizophrenic forestry," in which forest expansion leads to the rise of degraded monocultures alongside "pristine" sites of conservation.  相似文献   
13.
This paper describes two approaches to the facial approximation of three individuals from the Wairau Bar burial site (New Zealand). Two individuals were approximated working in direct reference to the remains and incorporated manual drafting. The third individual, ‘Aunty’ (the respectful title given by the iwi Rangitane elders) was approximated from CT scans and using computer graphics. The computer graphic approach enabled a greater level of precision in the application of the research and recommendations that inform a facial approximation, and facilitated collaboration with appropriate expertise. The computer-graphic approach, however, also resulted in a more photographic facial appearance, which can imply a greater level of knowledge about hard/soft tissue relationships than is currently available.  相似文献   
14.
15.
16.
Fraser Hunter 《考古杂志》2013,170(2):231-335
Excavations at the findspot of the Deskford carnyx, a major piece of Iron Age decorated metalwork found in a bog in the early nineteenth century, revealed a special location with a long history. Early Neolithic activity on the adjacent ridge consisted of massive postholes and pits, suggesting a ceremonial site. An Early Bronze Age cremation became the focus for a feasting event in the Middle Bronze Age. Around this time, peat began to form in the valley, with vessels of pot and wood smashed and deposited there; these activities on ridge and bog may be connected. Activity in the bog intensified in the later Iron Age, when offerings included quartz pebbles, the dismantled carnyx head, and two unusual animal bone deposits. The ridge was cut off at this period by a complex enclosure system. This Iron Age activity is interpreted as communal rituals at a time of increasing social tension. The site’s significance in this period may stem from its unusual landscape character, with flowing water to one side and a bog to the other. The area saw occasional activity in the Early Medieval period, but its significance had waned.  相似文献   
17.
18.
This paper presents new 500 year interval palaeogeographic models for Britain, Ireland and the North West French coast from 11000 cal. BP to present. These models are used to calculate the varying rates of inundation for different geographical zones over the study period. This allows for consideration of the differential impact that Holocene sea-level rise had across space and time, and on past societies. In turn, consideration of the limitations of the models helps to foreground profitable areas for future research.  相似文献   
19.
Stable isotope analysis of charred archaeobotanical cereal grains has the potential to provide direct evidence of crop growing conditions in the past and to refine palaeodietary predictions. If isotope values of archaeobotanical material are to be considered robust, it is necessary to characterise the compositional changes associated with their charring and burial. This study used a suite of analytical techniques, including FT-IR and solid state 13C NMR, to characterise changes in the biochemical composition of modern einkorn grains with heating at 230 °C for 2 h, 4 h, 8 h and 24 h, encompassing conditions that replicate their undistorted ancient counterparts. The biochemical composition of archaeobotanical charred einkorn grains was also investigated by FT-IR and solid state 13C NMR in order to assess the changes in composition which occur during burial. Results of FT-IR and solid-state 13C NMR show that heating of modern einkorn grains resulted in Maillard reactions between cereal proteins and starch, forming high molecular weight melanoidins, which contain both alkyl and aromatic carbon. Loss of low molecular weight carbon and nitrogen-containing volatiles resulted in a slight but non-systematic increase in the δ13C values and a systematic increase of 0.8‰ in the δ15N values of the charred einkorn grains. Solid-state 13C NMR shows that the ancient charred einkorn grains consisted entirely of aromatic carbon and retained a similar proportion of nitrogen to their modern 24 h charred counterparts, despite a significantly lower concentration of amino acids. This indicates that the amino acid nitrogen in the ancient charred grains was retained in the stable melanoidins whose polymeric structure makes them resistant to subsequent degradation.  相似文献   
20.
Sabri Louatah’s Les Sauvages (2011–2016) joins an ongoing discussion over the French political class’s relationship with the racial and religious divides in contemporary French society. Louatah portrays the political class as imposing from above a divide between French descendants of Muslim immigrants and their majority-culture compatriots, and suggests that the functioning of the modern state makes this necessary: states are founded upon communities of belonging which require the exclusion of given minorities, and will reimpose that exclusion with force if a more inclusive model of community threatens to emerge. Two readings of how Les Sauvages suggests we should respond to this are possible. One suggests that subjects should reject the state entirely, seeking to form inclusive communities escaping its control. Another suggests that the structures of the modern state should be appropriated to promote inclusion, but that the nature of modern democracy will prevent such action from succeeding completely; as such, traditional political engagement must work in conjunction with more radical attempts to form communities free from exclusion. Both readings, however, hold in common the idea that racial and religious divides are imposed from above and that these divides cannot be completely overcome while working within mainstream political structures.  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