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   41篇
  免费   1篇
  2023年   1篇
  2020年   1篇
  2019年   2篇
  2017年   1篇
  2016年   1篇
  2013年   21篇
  2012年   1篇
  2011年   2篇
  2009年   1篇
  2007年   1篇
  2002年   3篇
  2001年   1篇
  2000年   2篇
  1992年   1篇
  1985年   2篇
  1973年   1篇
排序方式: 共有42条查询结果,搜索用时 984 毫秒
1.
2.
3.
The combined application of remote sensing techniques is often the most effective way for deepening the knowledge on very large archaeological sites (several hectares). In particular, geophysics and aerial photography could yield very detailed information on buried structures not only outlining their location but also, in many cases, defining their planimetry. Moreover, the accurate geocoding of different data sets and the use of GIS for their integration allow to extract the most comprehensive information from a combined study.  相似文献   
4.
Becky Mansfield 《对极》2011,43(2):413-434
Abstract: This paper contributes to scholarship on health and environment by focusing on connections between human health and political economy of seafood. The contemporary rise of aquaculture is an effort on the part of the seafood industry to escape the contradictions of capital that create crisis in capture fisheries. Yet intensive aquaculture may also create human health problems that contribute to new crises. Aquaculture practices not only increase production of healthful fish, but also lead to fish burdened with chemical pollutants about which there are a variety of health concerns. These health concerns pose problems for producers who may not be able to sell contaminated seafood. By examining the intertwined biochemical and social processes that produce multiple natures (fish bodies, human bodies and the aquatic environment), the paper shows that concerns about health are not only an outcome of political economic processes, but are also an explanatory factor in these processes.  相似文献   
5.
Adult discourses often represent relationships between children and animals as beneficial for children's psycho-social development or as reflecting a ‘natural’ connection between children and animals. In contrast, this paper draws on recent work in sociology and geography where human–animal relationships are seen as socially situated and where conventional constructions of the human–animal boundary are questioned. Focussing on children's own perspectives on their connections with animals, it is argued that these relationships can also be understood within the social and relational context of children's lives. It is argued that this ‘relational’ orientation to children's relationships with animals might significantly enhance our understanding of children's lives and also open up ways of thinking about the place of animals in children's (and adults') social lives.  相似文献   
6.
Abstract

Between 1914 and 1935, the cities of Vienna and Pressburg/Bratislava were linked by an electric railway known as the Pressburgerbahn. More than just a line of transportation, the railway became intertwined with the complex politics of identity in Pressburg. The Pressburgerbahn presented nationalists in the Habsburg Empire with a dilemma: it had the potential to contribute to the unification of the nation, but at the same time was transnational by definition. This paradox generated a heated controversy about the Pressburgerbahn between Magyar nationalists and the predominantly German-speaking Pressburg bourgeoisie. Using biologized rhetoric, Hungarian politicians and journalists portrayed their nation as a body politic that was disfigured by having a railway ‘vein’ cross the border into Austria, in particular from such a peripheral location as Pressburg. By contrast, the discourse of the German-speaking bourgeoisie was firmly anchored in an imperial, supra-ethnic landscape. This controversy was replayed following the incorporation of the renamed city of Bratislava into Czechoslovakia in 1919: the Prague-based Ministry of Railways employed the rhetoric of the railway as an integrating structure within the body politic, while the eventual closure of the Pressburgerbahn in 1935 was closely connected to the belated nationalization of Bratislava. The railway to Vienna thus became a symbol of the liminal status of the town as a whole, in terms of nation, geography, politics and culture.  相似文献   
7.
We present a series of iterative methods to examine the problems associated with summed probability functions (SPFs) based on archaeological radiocarbon data. As a case study we use an SPF generated from a substantial radiocarbon data-set from the Irish Later Bronze and Iron Ages. We use simple numerical methods to show that real patterns can be deciphered from SPFs that can be used to trace and evaluate patterns of change. However, our results suggest that SPFs should not be used as a simple index of past human activity.  相似文献   
8.
Over 50 identifications of Tertiary pollen are reviewed. The pollen assemblages indicate rain-forest through most of the Tertiary, but the requisites for pollen preservation are biased towards the wetter climates.

The present day geographical affinities of the botanical groups are largely with taxa of the tropical zone and Australia-wide taxa. There is geographic variation in the fossil pollen assemblages when southeastern Australia is compared with Central Australia and Queensland.

The major changes in the fossil floras coincide with climatic change, indicating the influence of climate on the evolution of plant assemblages. The older phytogeographic concepts are inappropriate for the fossil record, especially when considered in conjunction with palaeoclimates and palaeogeography.

It is unfortunate that palynology has given little information of the evolution of floras in drier climatic regimes, or of the evolution of the eucalypts.  相似文献   
9.
10.
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