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   54篇
  免费   0篇
  54篇
  2023年   4篇
  2020年   3篇
  2019年   4篇
  2018年   2篇
  2017年   6篇
  2016年   8篇
  2015年   3篇
  2014年   4篇
  2013年   6篇
  2012年   1篇
  2011年   2篇
  2010年   1篇
  2009年   2篇
  2007年   2篇
  2003年   1篇
  2001年   2篇
  1998年   1篇
  1994年   1篇
  1989年   1篇
排序方式: 共有54条查询结果,搜索用时 15 毫秒
41.
87Sr/86Sr isotope ratios of cedar wood from forests in the East Mediterranean have been compiled in order to investigate the feasibility of provenancing archaeological cedar wood finds. Cedrus sp. forests furnished a great amount of wood in antiquity, for purposes ranging from ship to temple construction, and for fashioning cult statues and sarcophagi. The 87Sr/86Sr signatures of archaeological cedar samples may be compared with the preliminary dataset presented here to help determine the geographic origin of wooden artifacts. Sample sites include two forest areas in the Troodos Massif of Cyprus, five in the Lebanon, and two in Turkey’s Taurus Mountains. Sr ratios for wood varieties (i.e., early heartwood, late heartwood, sapwood, and twig wood) demonstrate relative uniformity between the xylem types frequently recovered from archaeological contexts. As such, this pilot study also assesses important issues of archaeological sampling and the geographical factors that influence Sr uptake in cedar trees of this region. While the regional signatures are distinct in most cases, small sample sizes and range overlap indicate the need for additional methods to make a case for a certain source forest. Alone, this method continues to be best used to disprove assumed wood provenances.  相似文献   
42.
43.
    
The Ubaid cultural phenomena (6500–4200 BC) of southern Mesopotamia has been used to characterise other archaeological sites in the Arabian Gulf region. The aim of this inquiry is to explore the nature of the interaction between the homeland of the Ubaid and the wider Gulf region. Through the use of a non-destructive portable X-ray fluorescence (pXRF) spectrometer, this study seeks to characterise and identify the chemical and mineralogical compositions of the ceramic assemblage from the Bahra 1 site of the As-Sabbiya region, Kuwait. The chemical results demonstrated that a combination of six trace elements [rubidium (Rb), strontium (Sr), yttrium (Y), zirconium (Zr), niobium (Nb) and barium (Ba)] occur significantly enough to delineate clay-based artifact groups—local red coarse from Ubaid, while the mineralogical analysis confirms the pXRF result and identifies the source of the raw materials and temper as well. Also, the comparison between the Ubaid and Bronze Age assemblage results suggests that potters used different clay resources within their own regions and/or production techniques.  相似文献   
44.
A group of Copper Age shaft‐hole axes from Caput Adriae (northeastern Italy, western Slovenia and northwestern Croatia) manufactured using meta‐dolerite have been analysed for major and trace elements. All the samples show magmatic textures and well recognizable relicts of primary mineralogical phases. Petrographic observations suggest an ophiolitic provenance of the protolithic source(s) while geochemical data indicate that the original magmas originated in a fore arc or pre arc tectonic setting. Strong similarity has been found with several lithotypes from the Banija Ophiolite Complex (Croatia), here indicated as the most probable source area. Considering the available archaeometric data about shaft‐hole axes found in northern Italy and Caput Adriae in comparison to those of axe blades discovered in the same area, it emerges that there is a utilization of different rock types, the source of which appears to be quite close to the discovery sites. In the investigated area the shaft‐hole axes are largely made from ophiolitic‐related rocks which are associated with copper deposits. Consequently there may have been a relation between the localization of the geological sources of shaft‐hole axes and the development of metallurgical activities.  相似文献   
45.
    
Medieval monasteries often went beyond their religious mission and developed into economic, social, and educational centres. These were not spared from violent attack on the part of the gentry. The defence of such monasteries is, however, a poorly investigated area in bioarchaeological studies. A recently excavated skeletal sample found in front of the western gate of the Abbey Church at the Teplá monastery (Czech Republic) dated between the 13th and 15th century AD provides us a unique opportunity to fill this gap. The analysis of skeletal trauma reveals that 13 out of 30 individuals exhibited trauma, of which 69% were confidently related to violence. All individuals with injuries were males, and half of them were younger than 30 years of age. The presence of ante‐mortem injuries indicates that males likely had previous combat experience, were successfully treated, and their bodies were buried with respect and care. The most probable explanation of our findings is that the individuals were a group of clients who were tasked with the defence of the Teplá monastery. Other, less likely explanations assume that individuals were laity, monastery benefactors, and/or canons killed during several different violent attacks directed at the monastery.  相似文献   
46.
    
From the Neolithic up to the present, people have used various methods to improve the surface of ceramic objects. In this study, we look specifically at smoothing and pattern burnishing of ceramics produced today by traditional methods. Optical microscopy and SEM show specific surface changes. Smoothing results in an irregular surface, which causes diffused reflection of light. Burnishing produces an even and compact surface, which causes specular reflection and lustre. The results can be used to infer methods of surface treatment employed by ancient peoples as well as to help identify the presence of ceramics production centres at archaeological sites.  相似文献   
47.
48.
This paper deals with the book Cosmotheoros (1698), in which Christiaan Huygens presented his concept of a universe made up of many inhabited planets. Recent interpreters of this work have focused especially on cosmological issues presented in the book. Cosmotheoros, however, comprises also various philosophical ideas. In this paper I want to focus on the concept contemplator coeli – stargazer. The stargazer was the embodiment of the philosophical ideal of the contemplative way of life that appeared in classical philosophy and astronomy. I want to argue that Huygens followed on from the idea of the stargazer and used it in his hypothetical construction of extra-terrestrial life. At the same time, however, he altered this idea in such a way that it corresponded better to the ideals of science at the end of the seventeenth century. In Huygens’ concept, the noble contemplator coeli turned into the modern scientist who works with other scientists on the advancement of mankind’s knowledge of nature. Huygens’ stargazers are a good example of how strikingly the basic assumptions of knowledge of nature in the early modern period changed with regard to classical antiquity.  相似文献   
49.
Books reviewed in this article: G. Caprio, P. Honohan and J. E. Stiglitz (eds.), Financial Liberalization, How Far, How Fast? B. Eichengreen, Financial Crises and What to do about Them D. Nayyar (ed.), Governing Globalization, Issues and Institutions J. E. Stiglitz, Globalization and its Discontents J. J. Teunissen (ed.), New Challenges of Crisis Prevention, Addressing Economic Imbalances in the North and Boom‐Bust Cycles in the South J. Tirole, Financial Crises, Liquidity and the International Monetary System  相似文献   
50.
    
In this study, we present a novel, safe method for how to remove inorganic components from soil samples studied for archaeological purposes, in order to improve studies of the distribution of black carbon in the sedimentary record. As the depositional history of this material depends on the interaction between humans and the natural environment, this method can be widely used in archaeology, landscape archaeology, palaeoecology, environmental geology and sedimentology. Our method does not require the use of dangerous hydrofluoric acid, which is commonly used for the removal of silicon oxide from such samples; therefore, this procedure allows even less chemically trained scientists to analyse soil samples with an increased level of work safety.  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