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   562篇
  免费   23篇
  2023年   6篇
  2022年   6篇
  2021年   1篇
  2020年   26篇
  2019年   17篇
  2018年   35篇
  2017年   40篇
  2016年   33篇
  2015年   21篇
  2014年   35篇
  2013年   178篇
  2012年   17篇
  2011年   20篇
  2010年   20篇
  2009年   12篇
  2008年   17篇
  2007年   17篇
  2006年   9篇
  2005年   8篇
  2004年   7篇
  2003年   2篇
  2002年   10篇
  2001年   5篇
  2000年   4篇
  1999年   4篇
  1998年   11篇
  1997年   2篇
  1996年   5篇
  1995年   1篇
  1994年   3篇
  1993年   1篇
  1992年   2篇
  1989年   2篇
  1985年   1篇
  1984年   1篇
  1981年   1篇
  1975年   1篇
  1973年   2篇
  1972年   1篇
  1966年   1篇
排序方式: 共有585条查询结果,搜索用时 15 毫秒
71.
Mineralised fruits and seeds are frequently found in archaeological sediments but their chemical nature has not been often examined. The nature and the origin of these archaeobotanical remains have to be investigated to understand their taphonomic history. Fruits or seeds can be mineralised not only by replacement mineralisation but also by biomineralisation during the plant life. The mineral components of three fossil fruits sampled on the Pleistocene site of Dmanisi were analysed and compared with their modern analogues. Analyses were carried out by means of an environmental scanning electron microscope, equipped with an energy dispersive X-ray device and by means of a Fourier transform infrared spectrometer. Biogenic carbonates and/or biogenic silica were identified in the fossil and modern fruits of some taxa. Comparison between fossil and modern specimens has shown that molecular reorganisation occurred in carbonate and in biogenic silica during fossilisation, through diagenetic processes. The resulting stable mineral structures confer an exceptional preservation to fruits in sediments. Taking into account these taphonomic specificities (transformation and differential preservation), the chronological and palaeoenvironmental aspects of the mineralised fruits are discussed.  相似文献   
72.
73.
Matthew Paris was one of the most prolific and influential historians of the central middle ages. Matthew's significance rests both on the range of his interests and the scope of his writing. Yet, even basic questions about his outlook on writing, his concept of history, or the relationship with his audience, have hardly been asked. These issues are central themes of this article, and will be used to consider wider questions about Matthew's concept of truth, his handling of information, and his view of the world around him. The article, furthermore, extends coverage beyond the Chronica majora or Matthew's vernacular writings to consider his concept of history as it emerges from the totality of his oeuvre.  相似文献   
74.
75.
Two competing discourses emerge from a careful reading of parliamentary debates in Norway on rural development. One regards rural values as intrinsic, while the other regards the rural as an actor in a play about economic growth. The 'growth' discourse has economic growth as its nodal point and fo-cuses on the freedom of an individual to establish a business wherever he or she wishes, and to migrate to any preferred destination. The 'intrinsic value' discourse places the value of rural settlements and cultures as its nodal point and focuses on allegedly forced migration, a nature-based economy, and local freedom of action. During the neoliberal period, starting about 1980 the strength of the intrinsic value discourse has been increasingly displaced by the growth discourse. The latter seems to match general social changes such as neoliberalism and globalization more than the former. However, analysing the fight between these two discourses is not exhaustive. A broader analytic perspective is needed if we want to understand the logic of how the meaning of rurality comes about. The meaning of rurality in Norwegian politics is made through the way the competing discourses link up to 'nondiscursive' topics that originate and evolve outside the discourses on Norwegian rural politics. We claim that topics which include economic safety and national identity/nation-state are more or less fundamental to understanding the logic of the production of the concrete discourses of rurality in Norwegian politics. We provide evidence that rural change is contingent not only on the meaning-making process in parliamentary debates, but on the way truth claims made by politicians are linked to general national and global issues.  相似文献   
76.
Universities are increasingly seen as potential contributors to regional innovative capacity by serving as local knowledge conduits, bringing global state-of-the-art science and technology into the region. In practice, however, more active university engagement with their regional innovation systems is not as straightforward as it may seem. The article uses examples from a successful case by which less successful regions could be inspired. Our analysis considers how various forms of technological learning intersecting within Lund University around three distinct sectoral engagement efforts have been built up and how this created new structural regional innovation capacity.  相似文献   
77.
The headscarf continues to be a highly charged political issue in Turkey where it is often understood through the prism of the opposition between so-called Islamists versus secularists. My work brings together feminist scholarship on the politics of everyday space and recent rethinking of the categories of secularism and religion. I begin by situating this politicized debate in the everyday material contexts of the public square, the street, and the mall. By introducing popular culture (notably the film Bü?ra) and my own fieldwork on the veil, I argue that the headscarf represents the intersection of politics of place and individual agency in a way that renders ideological debates contingent on everyday practices. Reducing the headscarf to a sign of Islamism fails to take into account the ever-shifting meanings of this object across time and space. The differences within and between the everyday urban sites I examine reveal much more complex, often contradictory, and discontinuous geographies of secularism and Islam. This analysis reveals a multiplicity that belies attempts to delineate clearly bounded spaces, subjects, and ideologies, one that is intimate and political.  相似文献   
78.
This article analyses two instances of abortion law reform in Latin America. In 2006, after a decades-long impasse, the highly controversial issue of abortion came to dominate the political agenda when Colombia liberalized its abortion law and Nicaragua adopted a total ban on abortion. The article analyses the central actors in the reform processes, their strategies and the opportunity contexts. Drawing on Htun's (2003) framework, it examines why these processes concluded with opposing legislative outcomes. The authors argue for the need to understand the state as a non-unitary site of politics and policy, and for judicial processes to be seen as a key variable in facilitating gender policy reforms in Latin America. In addition, they argue that ‘windows of opportunity’ such as the timing of elections can be critically important in legislative change processes.  相似文献   
79.
Abstract: The state is often described in transition: public spaces are rearranged by private companies, national social welfare is being privatized to some extent, and supranational institutions have more influence on national policies. “A view from the kitchen” (Diane Elson) is helpful for understanding the changing dynamics of states and societies because different women are affected by these policies in different and often ambiguous ways: women of the globalized South migrate to the North, creating global care chains, while women in Western industrialized countries are confronted with changing welfare regimes, leaving mainly highly educated women to profit from this situation. This article contributes to feminist debates on economic globalization and state internationalization. Our feminist materialist perspective allows a critical view on dominance and power in “governance”. Thus, the article adds to feminist debates on globalization from the perspective of state transformation and to debates on governance from the perspective of state transformation grounded in gendered social relations.  相似文献   
80.
This essay argues that translation in Se questo è un uomo (If This is a Man) (1947), as well as in related pieces, functions for Primo Levi as a key means for claiming and potentially repairing manhood. In its capacity to reposition meaning, translation functions as a powerful vehicle for affirming agency, particularly gendered agency. What emerges in Levi's writings, particularly in Se questo's “Canto of Ulysses” chapter, is the figure of the translator as resistance fighter: the man who uses his intellect, his love of languages and other men, and his desire to communicate in order to combat the assault on humanity perpetrated by Nazism and sustained by its legacy. In this Levi's writing exists on a continuum with the cultural work of the founding members of Giustizia e Libertà and, accordingly, complicates Italy's postwar understanding of partisan activity. Throughout Se questo è un uomo and related works, translation proves a vital if imperfect means for reclaiming manhood and for asserting the possibility of friendship across cultural, regional, ethnic, and gender boundaries.  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