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   175篇
  免费   5篇
  2023年   1篇
  2020年   1篇
  2019年   7篇
  2018年   4篇
  2017年   5篇
  2016年   3篇
  2015年   3篇
  2014年   2篇
  2013年   61篇
  2012年   2篇
  2011年   9篇
  2010年   5篇
  2009年   7篇
  2008年   2篇
  2007年   10篇
  2006年   3篇
  2005年   2篇
  2004年   4篇
  1999年   1篇
  1998年   2篇
  1997年   4篇
  1996年   2篇
  1995年   2篇
  1993年   2篇
  1992年   4篇
  1987年   1篇
  1986年   2篇
  1985年   5篇
  1984年   1篇
  1983年   5篇
  1981年   1篇
  1979年   2篇
  1978年   1篇
  1976年   1篇
  1975年   2篇
  1974年   1篇
  1973年   1篇
  1972年   2篇
  1970年   1篇
  1968年   2篇
  1966年   1篇
  1960年   3篇
排序方式: 共有180条查询结果,搜索用时 31 毫秒
51.
52.
53.
54.
55.
56.
"SCENOPHOBIA", GEOGRAPHY AND THE AESTHETIC POLITICS OF LANDSCAPE   总被引:2,自引:2,他引:0  
Recent critiques of the nature–culture dualism, influenced by diverse theoretical stances, have effectively destabilized the “naturalness” of nature and highlighted its pervasive and intricate sociality. Yet the practical, ethical and political effects of this theoretical turn are open to question. In particular, the emphasis on the sociality of nature has not led to reinvigorated environmental or landscape politics. Meanwhile, the need for such politics has if anything increased, as evident when ongoing and, arguably, accelerating landscape transformations are taken into account. These concerns are illustrated in the paper with an example from Iceland. In its uninhabited central highland, serious battles are now being fought over landscape values. Capital and state have joined forces in an investment‐driven scramble for hydropower and geothermal resources to facilitate heavy industry, irrevocably transforming landscapes in the process. Dissonant voices arguing for caution and conservation have been sidelined or silenced by the power(ful) alliance. The author argues for renewed attention to the aesthetic, including the visual, if responsible politics of landscape are to be achieved. Aesthetic appreciation is an important part of the everyday experiences of most people. Yet, enthusiastic as they have been in deconstructing conventional narratives of nature, geographers have been rather timid when it comes to analysing aesthetic values of landscape and their significance, let alone in suggesting progressive landscape politics. A political geography of landscape is needed which takes aesthetics seriously, and which acknowledges the merit of engagement and enchantment.  相似文献   
57.
A variety of microfossils, originating from plant foods, become trapped in the dental calculus matrix. Processing of dental calculus allows extraction of these microfossils. The resulting data can be used to reconstruct diet at the individual and population levels as the identification of microfossils like starch grains and phytoliths to the generic level, and sometimes to the species level, is possible. However, in some archaeological sites, dental calculus deposits do not preserve well enough to be processed. To prevent the loss of information in such cases, we present a technique, called “dental wash”. It permits extracting microfossils from cryptic dental calculus deposits. In the two experimental archaeological cases presented herein we identified phytoliths, starch grains as well as a diatom fragment with this method, whereas in a control sample no microfossils were found. Moderate damage to the teeth was detected when they were already friable due to poor preservation. Minor damage to the surface of well-preserved teeth was observed. This indicates that the proposed method is efficient in recovering microfossils, but unacceptable because of damage to teeth. If the method can be refined, it will expand the potential of dental calculus analysis to a greater range of archeological sites.  相似文献   
58.
59.
60.
Late Devonian trilobites from horizons close to the Frasnian-Famennian boundary in the Shogrām Formation at Kurāgh, Chitral (NW Pakistan) are described. A new species of Asteropyginae, Neocalmonia chitralensis sp. nov., and a new subpecies, Neocalmonia batillifera orientalis subsp. nov., are described; these extend the range of Asteropyginae eastwards from Iran and southern Afghanistan. The Upper Kellwasser Event is located within KUR 19 of Talent et al. (1999).  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