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   170篇
  免费   7篇
  2024年   1篇
  2023年   3篇
  2022年   5篇
  2021年   3篇
  2020年   9篇
  2019年   14篇
  2018年   11篇
  2017年   13篇
  2016年   11篇
  2015年   9篇
  2014年   7篇
  2013年   24篇
  2012年   9篇
  2011年   5篇
  2010年   6篇
  2009年   7篇
  2008年   8篇
  2007年   2篇
  2006年   5篇
  2005年   4篇
  2004年   2篇
  2003年   1篇
  2002年   1篇
  2001年   3篇
  2000年   3篇
  1999年   2篇
  1997年   2篇
  1996年   1篇
  1994年   2篇
  1991年   2篇
  1990年   1篇
  1977年   1篇
排序方式: 共有177条查询结果,搜索用时 15 毫秒
21.
22.
This article is a case study of the detailed contextual and scientific analysis of a single object, moving beyond a conventional object biography to consider flows of materials and shifts in meaning and value. The object is a simple triangular silver ingot from the Late Iron Age shrine site at Hallaton, Leicestershire, UK. Scientific analysis is used to uncover the biography of the ingot, and the raw materials from which it was created. The results suggest that the metal which eventually formed the ingot circulated through both Iron Age and Roman social networks, being reworked and transformed several times before it was deposited. Silver emerges as a material which mediated between the Mediterranean world and Iron Age communities in Britain, allowing translation and transmutation between different systems of value in conquest‐period Britain.  相似文献   
23.
24.
Stable carbon (δ13C) and nitrogen (δ15N) isotope ratios are commonly used to reconstruct palaeodiets and palaeoenvironments. The method is based on our knowledge of isotopic patterns in plants, which are subject to taxonomic and environmental variability. While previous researchers have addressed isotopic variability amongst plants, no studies have looked extensively at a broad suite of taxa over multiple temporal scales from within the savanna biome so as to provide baseline data for palaeodietary and palaeoenvironmental studies. Here we document variations in the isotopic compositions of plants collected over two years from the Kruger National Park, South Africa, with respect to species and anatomical differences, and the influences of geological substrate and spatio-temporal shifts in climate. Results show that environmentally-induced carbon isotopic variations in plants within this region are generally smaller than 2‰, which is lower than what has been previously reported for plants compared across multiple habitat-types. These data suggest that δ13C differences of 2‰ or more (or 1‰ if the diet is predominantly C4) between animals from a given area reliably indicate real dietary differences. Plant δ15N values vary greatly between different microhabitats (by up to 4‰), responding to a range of environmental influences that may, in turn, significantly influence variation in animal δ15N values.  相似文献   
25.
Abstract. This article attempts to understand the development of the national memory in Israel and the stress on the Holocaust as the constitutive representation of the national identity in the last decades. In the first three decades of the existence of the state, at a time Israeli society was embedded in an ‘environment of memory’ due to the presence of a big proportion of Holocaust survivors, the subject of the Holocaust was almost neglected in schools. On the other hand, since the 1980s, when the ‘environment of memory’ of the Holocaust started to fade naturally, ‘sites of memories’ of the Holocaust started to blossom in the education system. The national memory is meant to support political and social arrangements in the present; thus, in order to shape national subjects, the education system has to adapt the official memory accordingly. While in the past, the memory of the Holocaust was counterproductive to the formation of the ‘new Jew’, it became an appropriate response to the crisis of the national subjectivity unleashed after the Yom Kippur War.  相似文献   
26.
Le Grand Abri aux Puces (GAP), located on the right bank of the Ouvèze River of southern France, has been known to contain well-preserved stone tools and faunal remains, but our work in 2008 was the first professional, controlled excavation at the site and has exposed at least 1 archaeological layer with a very rich and diverse faunal assemblage (23 macrofaunal species, as many for the microfauna, 27 land snail species), abundant charcoals (fragments are large and preserve small twigs with their pith and bark still intact), and stone tools with immaculate surface preservation (retaining their original freshness and preserving microscopic use wear). The information issuing from paleontology, micropaleontology, malacology, and anthracology all place the principle GAP human occupation unambiguously in a temperate climatic phase. Different biometric and biochronological characters of the fauna converge to place the layers found thus far from before the last glacial, and most likely in MIS 5e (127–117 kya). The lithic elements, mainly composed of tools of superior quality, demonstrating particular technical investment, and made from widely distributed raw material sources, lead us to hypothesize brief passages of hunting groups in the cave focused around an anticipated activity. This hypothesis will be refined and tested during further excavations.  相似文献   
27.
This work describes the compositional characterisation of coccciopesto and natural pozzolanic mortars sampled in the Regio VI area of the archaeological site of Pompeii, with particular reference to the Casa di Pansa in Insula 6 and Casa 17 in Insula 2. Samples were studied by optical microscopy and analysed by XRF, SEM-EDS, LA-ICP-MS and XRPD. The XRF and SEM-EDS data, subjected to multivariate analysis (cluster analysis), identified the three main construction phases involved in building the Casa di Pansa. In addition, mineralogical and petrographic characteristics of the aggregate were determined and found to be compatible with pyroclastic deposits from the volcano Vesuvius. Study revealed C–S–H phases in the binder, due to pozzolanic hydration phemomena of hydrated lime with cocciopesto and natural pozzalana.  相似文献   
28.
This article analyzes the actual interaction of private and public immunities in ancient Athens, and argues that ancient democracy echoed to a greater extent than traditionally assumed the general dynamics and normative foundations of deliberative democracy. Without denying the important differences that distinguish ancient democratic Athens from modern democracy, I analyze the Athenian situation in light of Habermas's theory of deliberation, and argue that civic and individual liberties in Athens were democracy-enabling because they undergirded the exercise of collective political power. In Athens, the considerable respect accorded to the rule of law (as distinct from majority rule), legitimated private autonomy and created the circumstances that made collective self-government possible. Thus, this article contradicts the dichotomous approach to liberty held by some of the most prominent critics of Athens such as Isaiah Berlin and Benjamin Constant.  相似文献   
29.
30.
Now that the fifteenth legislature has come to an end, it is appropriate to assess the performance of the government whose fall was responsible for this event, as well as the coalition's significance for the trajectory of Italian politics generally. The four articles that follow this one together initiate the task, exploring performance from an institutional and policy-making point of view. This article suggests four criteria for evaluating the performance of any government and offers a brief initial ‘summary report’ in terms of them –?paying special attention to implementation of the programme and to communications. Bearing in mind the structural conditions in which it had to work, the government had some notable achievements to its credit, but these same conditions undermined it by opening up an unbridgeable gap between performance and popular perceptions of performance.  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