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   236篇
  免费   13篇
  2024年   1篇
  2023年   5篇
  2022年   1篇
  2021年   7篇
  2020年   7篇
  2019年   13篇
  2018年   16篇
  2017年   16篇
  2016年   14篇
  2015年   8篇
  2014年   8篇
  2013年   40篇
  2012年   10篇
  2011年   9篇
  2010年   7篇
  2009年   11篇
  2008年   8篇
  2007年   5篇
  2006年   8篇
  2004年   8篇
  2003年   3篇
  2002年   9篇
  2001年   1篇
  2000年   8篇
  1999年   4篇
  1998年   7篇
  1997年   5篇
  1996年   4篇
  1995年   2篇
  1994年   1篇
  1987年   1篇
  1984年   1篇
  1974年   1篇
排序方式: 共有249条查询结果,搜索用时 15 毫秒
131.
132.
The demolition of castles following the English Civil War is often seen as an inevitable consequence of the conflict, with their slighting often being ascribed to a need to prevent further bloodshed and punish the ruling elite. However, recent studies have demonstrated that the destruction of elite buildings during this period was far from straightforward, and this complexity is reflected in the methodology employed to damage them. At Sheffield, so extensive was this damage that, less than a century later, not a trace remained of what had once been one of the largest castles in South Yorkshire. Whilst little remains of the building itself, the rare survival of a set of demolition accounts, alongside a large number of other sources including personal correspondence, estate rentals and town records, means it is possible to explore in great detail the circumstances of the castle’s slighting. Through these a far more nuanced picture of civil conflict emerges with the castle’s destruction taking place within a complicated dialogue between the Lord of the Manor, Parliament’s officials and the inhabitants of Sheffield themselves.  相似文献   
133.
Archaeological analyses of European lithic technologies in North America are often discussed anecdotally within the context of other material evidence of European occupations. In North America, the presence of gunflints manufactured in Europe, generally England (which became part of Great Britain in 1707) or France, is used as a marker for the influence of these European powers and as a reflection of from whom residents obtained their material culture. Gunflints were made in Europe and in North America (north of the Rio Grande) from the early 1600s to the late 1800s. Thus, gunflints from sites such as the Natchez Fort, Louisiana (AD 1729–1731) provide a unique avenue of analysis for understanding both continuity in lithic technologies and the interactions between indigenous and introduced technologies. We address methodological concerns in typifying historic lithic collections, specifically eighteenth-century gunflints, particularly as these concern sourcing and the implications of sourcing for eighteenth-century colonial interactions in the southeastern United States.  相似文献   
134.
As part of an investigation of prey vulnerability in Isle Royale National Park, MI, digital image processing techniques were used to enhance original quantitative computed tomography (QCT) film products to detail the processes of bone resorption and reformation in skeletal remains of moose (Alces alces). Integration of these two allied imaging technologies allowed analyses of pixels representing fractions of millimetres of bone. Using regression analysis, linear conversions from the pixel digital numbers (DN) to QCT Hounsfield units (HU) to actual bone mineral density (BMD) values were calculated (r2=0.99), and a scale of pixels per millimetre of bone was determined. The colour-enhanced image revealed quantifiable patterns of density, porosity and asymmetry. In addition, the procedure provided a quick but consistent methodology for evaluating numerous scans. Combining the limited use of a high-demand and expensive medical QCT scanner with a lower cost, readily available digital image processing and analysis system provides a technique for researchers to investigate the bone integrity of individual animals and populations. This method of evaluating bone density has implications for use in determining differential skeletal part-preservation in archaeofaunal studies. © 1997 John Wiley & Sons, Ltd.  相似文献   
135.
136.
137.
Some recent interpretations of the early medieval Latin poem Waltharius have seen it as offering a clerical critique of warrior culture. While the poem is difficult to date accurately, it seems more likely to belong to the ninth than the tenth century. When the poem is analysed in the context of contemporary Frankish works providing moral instruction to lay noblemen, its attitudes towards pride, wealth and warfare can be shown to lie within the mainstream of Carolingian reformers' thought. The notoriously bloody ending to the poem is also best seen as emphasizing Walter's successful heroism rather than undermining it.  相似文献   
138.
139.
Efforts to reduce extreme poverty by assisting poor people to cross income or asset thresholds are receiving increasing attention in social protection programming. Livelihood‐promoting interventions aim to reduce vulnerability, so that participants can manage moderate risk and ‘graduate’ from social protection provision. This article elaborates the theory of change underpinning the notion of graduation and explores the range of enabling and constraining factors that facilitate or undermine this change process, drawing on case studies from Bangladesh, Ethiopia and Rwanda. The authors distinguish ‘threshold’ graduation from ‘sustainable’ graduation and argue that multiple factors operating beyond the household level — such as market conditions, community investment and scale effects — have significant implications for the graduation potential of social protection programmes.  相似文献   
140.
ABSTRACT This paper investigates the interplay between nativity and both homeownership and foreclosure in Miami‐Dade County, Florida at both the individual and community levels. We estimate the likelihood of individual‐level home ownership based on place of birth and year of entry to the U.S., and separately estimate community‐level foreclosures based on the demographic composition of neighborhoods. Results confirm previous work: all subgroups, except Cubans, are less likely to be homeowners than white, non‐Hispanics and only Cuban neighborhoods had foreclosure rates significantly lower than rates in white, non‐Hispanic neighborhoods. Nativity has a stronger effect on homeownership than on foreclosure levels.  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