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   155篇
  免费   15篇
  2023年   3篇
  2022年   1篇
  2020年   8篇
  2019年   6篇
  2018年   15篇
  2017年   21篇
  2016年   11篇
  2015年   3篇
  2014年   2篇
  2013年   48篇
  2012年   1篇
  2011年   6篇
  2010年   8篇
  2009年   6篇
  2008年   4篇
  2007年   2篇
  2006年   4篇
  2005年   1篇
  2004年   1篇
  2003年   4篇
  2001年   1篇
  2000年   1篇
  1999年   2篇
  1998年   3篇
  1997年   2篇
  1992年   1篇
  1989年   1篇
  1988年   1篇
  1978年   1篇
  1972年   1篇
  1971年   1篇
排序方式: 共有170条查询结果,搜索用时 31 毫秒
1.
The deposition of Early Neolithic material within tree-throw hollows in described, and the possible role of fallen trunks as places of occupation, settlement foci and landscape markers is discussed. Having implications for the interpretation of ubiquitous later Mesolithic pit dwellings, the evidence suggests a continuity of forest 'identity'. Accordingly, patterns of clearances are also explored in relationship to modes of occupation, and the employment of 'big wood' in Neolithic monuments discussed.  相似文献   
2.
Almost all of the obsidian used to craft stone tools in the Near East from the Palaeolithic onward originated from volcanoes in two geographic regions: Central Anatolia and Eastern Anatolia. Five decades of obsidian sourcing has led to the view that Central Anatolian obsidians largely followed the Mediterranean coast and rarely reached farther east than the Middle Euphrates, whereas Eastern Anatolian sources almost exclusively supplied sites east of the Euphrates. This paper discusses the identification of Central Anatolian obsidian artefacts at the Bronze-Age site of Tell Mozan (Urkesh) in northeastern Syria. Most of the obsidians at Tell Mozan (97%) came from the Eastern Anatolian sources, as expected from established distribution models. Artefacts of Central Anatolian obsidian, however, were excavated from one well-constrained context: the deposits on a palace courtyard that date to the height of the Akkadian empire's influence at this third-millennium Hurrian religious and political centre. In particular, the obsidian came from the Kömürcü source of Göllü Da?. Potential explanations for this exotic obsidian are discussed. This obsidian might have “piggybacked” on the distribution of Central Anatolian metals or arrived at this city as royal gifts or prestige items. Other discussed mechanisms include Akkadian-linked changes in either territoriality involving pastoral nomads responsible for the arrival of Eastern Anatolian obsidians or identity construction of elites based on involvement in Central Anatolian economic and political networks.  相似文献   
3.
4.
Policies concerning undocumented immigrants are inevitably ambivalent, creating uncertainty and confusion in the implementation process. We identify a clear example of this ambivalence —U.S. law setting standards for determining the credibility of asylum seekers—that resulted in an increase in asylum grants despite policymakers' intention to make it harder for individuals to obtain the status. We argue that this law, The REAL ID Act of 2005, sent mixed messages to immigration judges (IJs), street-level bureaucrats who implement immigration policy. It increased IJ discretion, but set vague limits. We theorize that IJs, behaving in a bounded rationality framework, use their professional legal training as a short-cut and look primarily to the courts for guidance. Our evidence supports our argument. After the passage of the REAL ID Act, IJ decision-making is more closely aligned with the preferences of their political and legal principals, and, in the final score, the federal circuit courts are the winners.  相似文献   
5.
SPATIAL DEPENDENCY OF SEGREGATION INDICES   总被引:3,自引:0,他引:3  
A few researchers have mentioned the scale sensitivity of segregation index, D. In this paper, I discuss analytically and empirically why using large enumeration areal units usually results in low segregation measures, and using small areal units produces relatively high segregation measures. The discussion is also applicable to the multi-group variant of D. A major finding is that if people of the same ethnic groups are positively spatially auto-correlated, increasing the size of areal units of analysis may not lower D initially, because only people of the same group are added. But enlarging the areal units subsequently may include population of other ethnic groups, and therefore could lower D. However, if the boundaries of the larger enumeration units are drawn to include only population of the same group, then D will not change significantly. Both the spatial autocorrelation of ethnic group population and zonal pattern are critical factors in determining the scale sensitivity of D.  相似文献   
6.
Archaeological evidence of ceramic production most commonly consists of locally procured raw materials. Excavations at Tell el-Timai in Lower Egypt recovered raw fine marl clay from two transport jars in the vicinity of pottery kilns dating to the 4th century b.c. Production wasters of small perfume bottles produced in the same fine marl clay were found inside the kilns. The marl clay inside the jars pointed to an origin outside of Lower Egypt. Samples of the clay and wasters, along with a confirmed locally sourced sample, were subjected to X-Ray Fluourescence (XRF) analysis, revealing significant differences in their chemical compositions. The results of the analysis are compared to published Egyptian data and an Upper Egyptian provenience is suggested because the raw clay is consistent with available comparative XRF data.  相似文献   
7.
8.
Invasive vegetation species can lead to major changes in the geomorphology of coastal systems. Within temperate estuaries in the southern hemisphere, especially Australia and New Zealand, the cordgrass Spartina spp. has become established. These species are highly invasive, and their prolific growth leads to the development of supratidal environments in formerly intertidal and subtidal environments. Here, we quantified the impact of Spartina invasion on the geomorphology and sequestration capacity of carbon in the sediments of Anderson Inlet, Victoria, Australia. Spartina was first introduced to the area in the 1930s to aid in land reclamation and control coastal erosion associated with coastal development. We found that Spartina now dominates the intertidal areas of the Inlet and promotes accretion (18 mm/year) causing the formation of over 108 ha of supratidal islands over the past 100 years. These newly formed islands are calculated to potentially contain over 5.5 million tonnes of CO2 equivalent carbon. Future management of the inlet and other Spartina‐dominated environments within Australian presents a dilemma for resource managers; on the one hand, Spartina is highly invasive and can outcompete native tidal marshes, thereby warranting its eradication, but on the other hand it is likely more resilient to rising sea levels and has the potential for carbon sequestration. Whether or not the potential advantages outweigh the significant habitat change that is anticipated, any management strategies will likely require additional research into costs and benefits of all ecosystem services provided by Spartina including in relation to nutrient cycling, shoreline stabilisation, and biodiversity as well as in response to the longevity of carbon found within the sediments.  相似文献   
9.
10.
Book reviews     
CHINA

ERIC KIT‐WAI MA.Culture, Politics, and Television in Hong Kong. London: Routledge, 1999. 242 pp. Introduction, appendices, notes, bibliography, index. £55.00, hardcover.

LILY XIAO HONG LEE and SUE WILES. Women of the Long March: the Never Before Told Story. St. Leonards, NSW: Allen & Unwin, 1999. 308 pp. Photographs, preface, chronology, maps, appendix, notes, bibliography, index. A$24.95, paper.

MARIE‐CLAIRE BERGÈRE. Sun Yat‐sen (trans. Janet Lloyd). Stanford: Stanford University Press, 1998. xii, 480 pp. Illustrations, introduction, endnotes, bibliography, index. A$90.00, hardcover.

JAPAN, KOREA

MASARU KOHNO. Japan's Postwar Party Politics. Princeton, NJ: Princeton University Press, 1997. xiii, 172 pp. US$65.00, hardcover; US$19.95, paper.

SHARON A. MINICHIELLO (ed). Japan's Competing Modernities: issues in Culture and Democracy 1900–1930. Honolulu: University of Hawaii Press, 1998. xiii, 394 pp. Illustrations, foreword, preface, introduction, index. US$54.00, hardcover; US$25.95, paper.

SOUTH, WEST & CENTRAL ASIA

DICK VAN DER MEIJ. India and Beyond: essays in Honour of Frits Staal. New York: Columbia University Press, 1998. 696 pp. $US110.00, hardcover.

ASHISH KOTHARI, NEEMA PATHAK, R. V. ANURADHA and BANSURI TANEJA (eds). Communities and Conservation. Natural Resource Management in South and Central Asia. New Delhi: Sage, 1998. 505 pp. Rs. 495, hardcover; Rs. 325, paper.

JAMES BROW. Demons and Development: the Struggle for Community in a Sri Lankan Village. (Hegemony and Experience. Critical Studies in Anthropology and History, Series Editors Hermann Rebel and William Roseberry). Tucson: University of Arizona Press, 1996. xviii, 218 pp. Index. US$45.00, hardcover; US$19.95, paper.

REIDAR DALE. Evaluation Frameworks for Development Programmes and Projects. New Delhi: Sage Publications India, 1998. 150 pp. Index. Rs. 275, hardcover; Rs. 145, paper.

SOUTHEAST ASIA

HANS ANTLOV and SVEN CEDERROTH (eds). Leadership on Java: gentle Hints, Authoritarian Rule. Richmond, Surrey: Curzon, 1994. viii, 197 pp. £25.00, paper.

CORNELIA ANN KAMMERER and NICOLA TANNENBAUM (eds). Merit and Blessing in Mainland Southeast Asia in Comparative Perspective. Monograph 45, Yale Southeast Asian Studies, 1996. 263 pp. No price given, paper.

IAN CHALMERS and VEDI HADIZ (eds). The Politics of Economic Development in Indonesia: contending Perspectives. London and New York: Routledge, 1997. Author notes, preface, acknowledgments. xxx, 269 pp. £60.00, hardcover.  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