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   49篇
  免费   5篇
  2023年   1篇
  2020年   2篇
  2019年   1篇
  2018年   3篇
  2016年   2篇
  2015年   3篇
  2013年   9篇
  2012年   1篇
  2011年   4篇
  2010年   2篇
  2009年   1篇
  2008年   2篇
  2007年   1篇
  2006年   7篇
  2005年   2篇
  2004年   3篇
  2003年   2篇
  2001年   2篇
  1998年   1篇
  1995年   1篇
  1992年   1篇
  1985年   1篇
  1981年   1篇
  1968年   1篇
排序方式: 共有54条查询结果,搜索用时 31 毫秒
1.
2.
During the past decade research into the German Final Paleolithic and Mesolithic has experienced an important revival. One clear sign of this renewed interest in the periods are the annual meetings of the Arbeitsgruppe Mesolithikum (Mesolithic Working Group) which have taken place every spring since 1992. At these meetings, which take place at changing venues, topical themes of Final Paleolithic and Mesolithic interest are presented by informal lectures and it is also possible to study regional collections (artifacts, raw materials) at first hand. Numerous contributions were subsequently published together in one volume (Conard and Kind (1998) Aktuelle Forschungen zum Mesolithikum/Current Mesolithic Research, Mo Vince, Tübingen). The present paper intends to complement that collection of papers with a synthesis of developments and perspectives and to present recent research highlights in the German Final Paleolithic and Mesolithic, together with a comprehensive bibliography, to a wider international audience.  相似文献   
3.
4.
Knowledge intensive business services (KIBS) are believed to be one of the main drivers of technological change, innovation, and economic progress. Although firm foundations play a crucial role among KIBS, entrepreneurship research has hardly ever investigated the sector. As firm founders in early stages of their firms' development mostly draw on regional resources, and as the provision of the services is an interactive process, “proximity” between the different actors of the particular territorial innovation and production system clearly matters. This contribution analyses the interrelationships between KIBS foundations and their respective innovation and production systems by performing qualitative and conceptual in-depth studies of three German metropolitan regions.  相似文献   
5.
6.
7.
Kazakhstan and Turkmenistan have been home to the most impressive urban development projects in the entire post-Soviet world. Their capitals, Astana and Ashgabat, now boast uniquely monumental architecture and local leaders have invested heavily in ‘green belt’ projects to surround the cities with lush vegetation, as well as developing green and water-laden public spaces. In doing so, elites have drawn on Soviet-era ‘garden city’ idealism, as well as more recent environmental sustainability narratives. Yet these schemes are anything but sustainable. Unfolding on the arid Central Asian steppe, they depend on heavy irrigation, with water diverted from rivers that already fail to meet regional demands. Employing a comparative approach, I ask why and with what effect state planners have sought to craft Astana and Ashgabat as spectacularly green ‘urban oases,’ when their local climates should defy the logic of sustainability. In so doing, I consider urban greening in the two countries as part of a wider phenomenon of statist schemes to green the desert, which have a long and diverse history. Extending the literature on desert greening, I argue that the structural violence they manifest and perpetuate is best understood by attending to how they operate as a form of spectacle.  相似文献   
8.
ABSTRACT

Evaluating the rate of deterioration at archaeological sites in the Arctic presents several challenges. In West Greenland, for example, increasing soil temperatures, perennial thaws, coastal erosion, storm surges, changing microbial communities, and pioneer plant species are observed as increasingly detrimental to the survival of organic archaeological deposits found scattered along the country’s littoral zones and extensive inner fjord systems. This article discusses recent efforts by the REMAINS of Greenland project for developing a standardised protocol that defines the archaeological state of preservation, the preservation conditions, and asset value of organic deposits. Special emphasis is given to the degradation of materials such as bone and wood that are historically observed to be well-preserved in Greenland but now currently at risk. The protocol provides a baseline for monitoring future changes and will assist archaeologists in Greenland with a procedure for documenting and predicting areas of increasing vulnerability due to a warming climate.  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