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   348篇
  免费   28篇
  2023年   7篇
  2021年   2篇
  2020年   6篇
  2019年   14篇
  2018年   16篇
  2017年   24篇
  2016年   20篇
  2015年   12篇
  2014年   15篇
  2013年   100篇
  2012年   10篇
  2011年   12篇
  2010年   6篇
  2009年   9篇
  2008年   12篇
  2007年   6篇
  2006年   7篇
  2005年   4篇
  2004年   11篇
  2003年   4篇
  2002年   8篇
  2001年   2篇
  2000年   2篇
  1999年   3篇
  1998年   4篇
  1997年   4篇
  1996年   2篇
  1995年   2篇
  1994年   2篇
  1993年   3篇
  1992年   3篇
  1991年   1篇
  1990年   4篇
  1989年   2篇
  1988年   1篇
  1987年   1篇
  1986年   1篇
  1985年   4篇
  1984年   7篇
  1983年   2篇
  1982年   2篇
  1981年   2篇
  1980年   4篇
  1979年   5篇
  1977年   1篇
  1976年   3篇
  1975年   1篇
  1974年   1篇
  1972年   1篇
  1967年   1篇
排序方式: 共有376条查询结果,搜索用时 15 毫秒
11.
On 3 March 2016, Ahmad al‐Faqi al‐Mahdi sat in a courtroom at the International Criminal Court (ICC) and became the first person to be prosecuted for the destruction of cultural sites as a war crime. In this article, the author argues that it is no coincidence that the first case the ICC has brought to justice involves a UNESCO World Heritage site. She charts the history of the relationship between Mali and UNESCO and the history of Islam in Mali. Through taking a historical perspective, current events can be seen as part of an ongoing ‘conversation’ about the future of the country. The ICC trial also has wider ramifications for the anthropological study of material culture and cultural heritage as it resists a plural understanding of people’s entanglement with sites and objects and demands instead a return to certainty.  相似文献   
12.
13.
14.
15.
CO2 injected into rock formations for deep geological storage must not leak to surface, since this would be economically and environmentally unfavourable, and could present a human health hazard. In Italy natural CO2 degassing to the surface via seeps is widespread, providing an insight into the various styles of subsurface ‘plumbing’ as well as surface expression of CO2 fluids. Here we investigate surface controls on the distribution of CO2 seep characteristics (type, flux and temperature) using a large geographical and historical data set. When the locations of documented seeps are compared to a synthetic statistically random data set, we find that the nature of the CO2 seeps is most strongly governed by the flow properties of the outcropping rocks, and local topography. Where low‐permeability rocks outcrop, numerous dry seeps occur and have a range of fluxes. Aqueous fluid flow will be limited in these low‐permeability rocks, and so relative permeability effects may enable preferential CO2 flow. CO2 vents typically occur along faults in rocks that are located above the water table or are low permeability. Diffuse seeps develop where CO2 (laterally supplied by these faults) emerges from the vadose zone and where CO2 degassing from groundwater follows a different flow path due to flow differences for water and CO2 gas. Bubbling water seeps (characterized by water bubbling with CO2) arise where CO2 supply enters the phreatic zone or an aquifer. CO2‐rich springs often emerge where valleys erode into CO2 aquifers, and these are typically high flux seeps. Seep type is known to influence human health risk at CO2 seeps in Italy, as well as the topography surrounding the seep which affects the rate of gas dispersion by wind. Identifying the physical controls on potential seep locations and seep type above engineered CO2 storage operations is therefore crucial to targeted site monitoring strategy and risk assessment. The surface geology and topography above a CO2 store must therefore be characterized in order to design the most effective monitoring strategy.  相似文献   
16.
17.
ABSTRACT

Before the Second World War, most Africans from British Tropical Africa who studied abroad were seeking qualifications in three professions: law, medicine and the Church. In all these, they could be reasonably sure of employment on their return. True, government employment was problematic, but law and medicine did offer the alternative – often more lucrative – of private practice. Much more threatening to colonial authority were arts students: those who read philosophy, literature, politics or sociology. This article focuses on several men who graduated in Britain or the USA: Kobina Sekyi, J.B. Danquah, James Aggrey, Bankole Awoonor-Renner (Gold Coast); Eyo Ita, Nathaniel Fadipe, Nnamdi Azikiwe – and his (mostly Igbo) protégés (Nigeria); Hosea Nyabongo, Balamu Mukasa, Ernest Kalibala (Uganda); Peter Koinange (Kenya). It concludes by surveying the career of Nicholas Ballanta-Taylor (Sierra Leone), who studied music in New York and in 1927 won a fellowship from the Guggenheim Foundation for musicological research in Africa. Of these pioneer African Africanists, four wrote successful doctoral theses, Azikiwe published an academic study. Aggrey and Fadipe died prematurely. Danquah applied his intellect to essentially non-academic pursuits. Ballanta, worked as a practical musician in the 1930s, but his African research remains virtually unpublished.  相似文献   
18.
ABSTRACT

The present study considers the role and function that humor has in Unamuno's intellectual and literary universe. It traces Unamuno's attitude toward humor to his reading of the Spanish character in En torno al casticismo (1895) and to his dialogue with the figure of Don Quixote, as found in Vida de Don Quijote y Sancho (1905) and Del sentimiento trágico de la vida (1912). Finally, it looks at the theory of humor offered in the novel Niebla (1914) and also at the role that humor played in Unamuno's later political writings, especially those of exile (1924–1930).  相似文献   
19.
Historians have scrutinised the racial classifications of Arab immigrants in the census, in immigration documents and in early‐twentieth‐century naturalisation cases. However, recent scholarship has shown that other archives – ones that do not focus on interactions with the law – reveal a different process of Arab‐American racialisation. This article contends that looking in other archival spaces, specifically the US social welfare archive, shows how ideas about gender, sexual and class difference constituted early Arab‐American racialisation. Social welfare reformers in institutional settings, including the International Institute of Boston, the National Conference of Social Work and the pages of the social work periodical The Survey, systematically linked Syrian labouring practices with notions of dependency, sexual and gender deviance, and Orientalist difference. Syrian women were racialised through their participation in the peddling economy – a network of peddlers, suppliers and domestic labourers that sustained a widespread profession of the early Syrian American community. Syrian women's labouring practices conflicted with white middle‐class femininity and posed a threat to Syrian claims of whiteness. This analysis demonstrates the centrality of gender, sexuality and class to studies of early Arab America and demonstrates how Arab migrant women's labouring practices affected their communities’ standing in the American context.  相似文献   
20.
Models of traditional boats stitched together with thread or cane from different parts of the world are commonly found in museum collections. They are often highly detailed and assembled in a way that is characteristic of a particular region. Through the presentation of a range of sewn‐boat models, particularly focusing on those from Sri Lanka, this paper considers how representative models are of full‐size boats, and if they can tell us about boat types and construction techniques. It provides guidance on using and interpreting models and aims to promote the use of these objects to further understand sewn boats.  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