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   112篇
  免费   3篇
  2023年   3篇
  2020年   2篇
  2019年   1篇
  2018年   4篇
  2017年   5篇
  2016年   4篇
  2015年   8篇
  2014年   1篇
  2013年   24篇
  2012年   1篇
  2011年   2篇
  2010年   3篇
  2009年   1篇
  2008年   1篇
  2007年   3篇
  2006年   2篇
  2005年   3篇
  2004年   1篇
  2003年   3篇
  2001年   2篇
  1999年   2篇
  1997年   2篇
  1996年   1篇
  1994年   2篇
  1993年   1篇
  1992年   1篇
  1991年   1篇
  1990年   2篇
  1989年   1篇
  1988年   2篇
  1986年   2篇
  1984年   1篇
  1983年   2篇
  1982年   2篇
  1981年   2篇
  1980年   1篇
  1979年   3篇
  1977年   5篇
  1976年   3篇
  1975年   1篇
  1970年   1篇
  1969年   2篇
  1963年   1篇
排序方式: 共有115条查询结果,搜索用时 15 毫秒
61.
The dramatic plunge in oil prices since the second half of 2014 poses serious challenges for the oil dependent states of Kuwait, Saudi Arabia, and Qatar, and revives their interest in accelerating the implementation of market‐based reforms such as outsourcing, privatization, and public–private partnerships. This article challenges the assumption that these reforms offer a panacea for administrative change, and argues that while they might appear to be a solution to the growing fiscal constraints in the three Gulf states, considerable administrative, cultural, economic, and political barriers hinder their effective implementation. The conclusion reached is that western labels of market‐based reforms offer limited options for the three states in the absence of strong political will to make fundamental reforms that could alter the state–society relations. It is suggested that further theorization of administrative change is required in cultural contexts, such as the Gulf region, where administration and society are intertwined, and where trying to minimize the role and size of the state, poses a direct threat to the political legitimacy of the ruling elites.  相似文献   
62.
In 2012 the UNESCO World Heritage Committee added to its World Heritage List the ‘Cultural Landscape of Bali Province: the subak system as a manifestation of the Tri Hita Karana Philosophy’. Barely a year later, UNESCO had become sufficiently concerned about reports of various problems that it advised the Government of Indonesia of these concerns. Through ethnographic study of the initial implementation of the listing, this article reveals problems of uncontrolled development, and disputes over the allocation of benefits to local communities, and challenges to effective governance. It focuses on two key locations of the site, offering an analysis of problems, their causes and effects. Beginning with the premise that the gulf of understanding between the global World Heritage system and local communities often creates a range of unintended consequences, this article reveals the many ‘awkward engagements’ that have emerged ‘on the ground’ in Bali as local agencies of government are left to their own devices to manage the World Heritage site.  相似文献   
63.
64.
The causes and implications of the regional variations in the spread of the incipient agriculture in Europe remain poorly understood. We use population dynamics models to study the dispersal of the Neolithic in Europe from a localised area in the Near East, solving the two-dimensional reaction-diffusion equation on a spherical surface. We focus on the role of major river paths and coastlines in the advance of farming, to model the rapid advances of the Linear Pottery (LBK) and the Impressed Ware traditions along the Danube–Rhine corridor and the Mediterranean coastline, respectively. We argue that the random walk of individuals, which results in diffusion of the population, can be anisotropic in those areas and hence lead to an effective advection. The standard reaction-diffusion equation is thus supplemented with an advection term, confined to the proximity of major rivers and coastlines. The model allows for the spatial variation in both the human mobility (diffusivity) and the carrying capacity, reflecting the local altitude and latitude. This approach can easily be generalised to include other environmental factors, such as the bioproductivity of landscapes. Our model successfully accounts for the regional variations in the spread of the Neolithic, consistent with the radiocarbon data, and reproduces a time delay in the spread of farming to the Eastern Europe, Britain and Scandinavia.  相似文献   
65.
The Early Medieval period in Ireland (c. A.D. 400–1150) has been the subject of much archaeological and historical study. The recent application of various forms of archaeological sciences, as well as palaeoenvironmental studies, to the archaeological record have, however, added fresh impetus to this study area. It seems increasingly evident that significant changes to economy and society occurred during this period and were not recorded in detail in the contemporary documentary sources. This paper will attempt to outline those changes and to assess whether, or to what extent, they were influenced by climate change.  相似文献   
66.
Libya's archaeological heritage is truly spectacular, comparatively little studied and hugely under threat. Following an extended period of isolation, improvement in Libya's relations with the rest of the world and a rise in the price of oil have stimulated a huge amount of development in the country, especially in the hydrocarbon and infrastructure sectors of the economy. With a rapidly growing population, and expanding youth unemployment, the Libyan government is attempting to develop a new way forward for its society and economy. Archaeology and heritage have not traditionally been high on Libya's agenda. The custodian of Libyan heritage, the Department of Antiquities, has been poorly supported by the state (perhaps in part relating to postcolonial Libya's ambivalent feelings towards its past) and is now badly positioned to deal with the nature and scale of development threats in the cities, the agricultural zone, and especially the desert where the greatest number of heritage assets are located. Most major development projects in these areas and elsewhere have been undertaken with little or no archaeological impact assessment, monitoring or mitigation activities, with unfortunate consequences for buried and standing archaeological remains. There are some encouraging signs of a sea change in the state's attitude to archaeology, heritage, conservation and tourism.  相似文献   
67.
Chronic kidney disease (CKD) is important in the fields of public health and health geography because of its heavy burden on the health system and high cost of treatment in its advanced stages. The causes of CKD are associated with diabetes and hypertension, but in some parts of the world, the disease occurs in the absence of these factors. Researchers identify this condition as CKD of “unknown” causes (CKDu). CKDu is a multi‐factored health problem and one suspected causal factor is contaminated drinking water. The disease occurs globally but is found in particularly high concentrations among people of certain ethnic and disadvantaged social groups living in very different locations around the world. CKD has become endemic in Western Australia where hospital admissions for Aboriginal people requiring renal dialysis or treatment for diabetes are much higher than for the general population. The possible proportions of CKDu cases among the CKD patients are unknown. This study examines the drinking water quality among communities such as these. Water chemistry analysis in these areas indicates that the nitrate and uranium content greatly exceed officially recommended levels. Most of these communities rely on raw groundwater to supply their domestic needs, and it is very likely that the people are unwittingly ingesting high levels of nitrates and uranium, probably including uranyl nitrates. Very few such remote communities have access to treated drinking water, and cost‐effective water treatment systems are required to provide potable water at the local scale.  相似文献   
68.
69.
70.
In the summer of 1988, television viewers across the United States and Canada were transfixed by images of Yellowstone National Park seemingly consumed by flames as wildfires burned almost one million acres of land within the Greater Yellowstone Area. In the wake of the fires, the governments of the United States and Canada both reassessed their policy approaches to fire management and came to two very different conclusions. The purpose of this study is to explore how the wildfire problem was defined in Canada and the United States in the wake of the Yellowstone wildfires, why these definitions were so different, and what effects these different definitions have had on fire policy. As a subtext, this research also highlights the challenges inherent in science‐based decision making.  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