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排序方式: 共有104条查询结果,搜索用时 15 毫秒
1.
The aim of this investigation was to analyze the materials and techniques of the paintings in the 16th-century ce St Mary's Church, to evaluate deterioration of the paintings, and to propose a suitable conservation treatment for their preservation. The material analysis of ground, pigments, binders, and plasters was undertaken using binocular microscopy, field emission scanning electron microscopy (SEM)–energy dispersive X-ray spectroscopy, X-ray fluorescence, Fourier transform infrared spectroscopy in reflectance (KBr) and transmittance mode (attenuated total reflection), thin-film X-ray diffraction, and micro-Raman spectroscopy. Gas chromatography–mass spectrometry (GC-MS) was used for identifying proteinaceous and lipidic materials extracted from the micro-samples. The study generated data on two different red and green pigments used as decorative materials. The red pigments were identified as cinnabar along with traces of hematite and clay minerals, and green as malachite and the minor presence of other minerals. SEM analysis identified cotton fiber embedded in the coarse plaster layer that provided better strength to the plaster. Plant oils and proteins found as the binder in the pigment samples suggested that the painting technique was executed as tempera. Lead white and gypsum materials were used in previous restoration works.  相似文献   
2.
P. Schmidt  A. Morala 《Archaeometry》2018,60(5):885-897
The earliest evidence of flint and chert heat treatment was found in the ~21.5–17 ka old European Solutrean culture. The appearance of pyrotechnology as part of the production of stone tools has important implications for our understanding of Upper Palaeolithic technological evolution and the specific adaptations during the last glacial maximum in Europe. However, the techniques and procedures used to heat‐treat rocks during the Solutrean remain poorly understood. No direct archaeological evidence has so far been found and the most promising approach is to understand these techniques by determining the parameters with which flint and chert were heated at that time. In this study, we investigate the heating temperature of 44 heat‐treated laurel‐leaf points from Laugerie‐Haute, using a non‐destructive technique based on infrared spectroscopy. Our results document that most of the artefacts were heated to a narrow interval of temperatures between 250 °C and 300 °C. This indicates a standardized technique that allowed to created similar conditions during successive heating cycles. The implications of these results for our understanding of the technical complexity during the Solutrean must be discussed in the light of different heating techniques used at different places and periods.  相似文献   
3.
It is widely acknowledged in the literature that the study of blame avoidance behavior (BAB) exhibited by public officials is scattered and unconcentrated, and that, for the most part, it neglects both contextual factors and comparative research. These deficits inhibit the production of the kind of generalized findings necessary to better understand potential consequences for the policy process and the workings of political systems. We address these deficits by developing a framework that takes stock of blame avoidance research, clarifies the explanatory potential of contextual factors, and allows for a systematic context‐sensitive cross‐case analysis. For illustrative purposes, the framework is applied to the Home Insulation Program in Australia as a critical case. This case reveals the explanatory potential of contextual factors for the understanding of BAB and the consequences thereof. We conclude by stating the advantages of our framework and explain how it can be used for comparative research.  相似文献   
4.
During the Late Intermediate period (LIP, c. A.D. 1000–1400), the central Andes experienced the decline of the Wari and Tiwanaku states, as well as processes of state formation, regional population growth, and competition culminating in the imperial expansion of the Chimú and Inka polities. The LIP holds the potential to link the archaeological features of early Andean states with the material signatures of the later ones, providing a critical means of contextualizing the intergenerational continuities and breaks in state structures and imperial strategies. The recent proliferation of LIP research and the completion of a number of regional studies permit the overview of six LIP regions and the comparison of highland and lowland patterns of political and economic organization, social complexity, and group identity.  相似文献   
5.
During the 1991–1992 excavation of the ruins of the medieval cathedral in Hamar, Norway, the broken skull of an elderly man was found, showing evidence of an incomplete trepanation. The ‘surgeon’ had obviously tried to penetrate the skull surface around bregma in an irregular circle of 23 × 21 mm. Upon investigation, the skull revealed a reactive‐pathological area of the internal surface of the occipital bone, which probably represents a respite after a meningeal disorder (a tumour or an infectious process), causing us to suggest that the trepanation was meant to cure the patient's increasing headache. However, as a second skull with similar marks was found in the same churchyard, another explanation seems possible. Because the brain tumour in the first case may have altered the patient's mental state, we may surmise that these incomplete operations were an attempt to remove from these patients' heads the ‘Stone of Madness’, which was then commonly considered to be the reason for psychiatric diagnoses as well as persistent headache, and often depicted in European art, most notably in the 16th and 17th centuries. The second skull, revealing an even more incomplete attempt, did not show any skeletal pathology at all. Copyright © 2007 John Wiley & Sons, Ltd.  相似文献   
6.
沈有梓 《攀登》2008,27(5):92-95
大力发展三江源地区的医疗卫生事业,不断提高人民群众的健康水平,对于加快生态文明建设,推动环境保护,促进人与自然和谐相处,统筹经济社会全面协调可持续发展,着力改善民生,使该地区与全国同步实现全面建设小康社会目标,都具有十分重要的意义。本文在概要阐述三江源地区医疗卫生事业发展现状与特征以及政府公共卫生政策措施与效应的基础上,提出推动该地区医疗卫生事业可持续发展的若干公共政策建议。  相似文献   
7.
心智模决定人们的思维方式和行为习惯。章认为接近与嫡系不良心智模式是旅行社增强竞争力的主要障碍。旅行社应积极倡导学习与效益型的心智模式。  相似文献   
8.
展望中国人文地理学的发展   总被引:15,自引:7,他引:8  
吴传钧 《人文地理》1996,11(Z1):1-10
中国自改革开放以来,人文地理学得到了复兴,在理论、方法和研究内容方面都有了新的发展,其中尤以经济地理学、城市地理学和旅游地理学的进展较快,原先被视为禁区的政治地理学、文化地理学和社会地理学,也开始出现了一批可喜的成果。目前在中国经济体制转轨的新形势下,中国人文地理学正处于一个重要的转折时期,即面临着严重的挑战,又出现了前所未有的发展机遇。
在迈入21世纪时,作者建议中国人文地理学着重研究以下各课题:
(1)为充实中国人文地理学的基础理论,研究人地关系地域系统;
(2)为配合(中国21世纪议程)的实施,研究全国和各地区社会经济的持续发展;
(3)以土地利用为中心来研究全球变化和人类活动的关系;
(4)从节约利用和保护资源出发,研究地区自然资源系统;
(5)为发扬中国地理学的传统,更认真地为农业服务,研究促进农业和农村的持续发展问题;
(6)从理论和方法上提高区域地理研究的水平、并配合国家任务,开展区域综合发展的研究,包括国家和各省经济建设的重点区、海域、生态脆弱区等。  相似文献   
9.
During the excavation of the Iron Age site of Noen U-Loke, in the Mun River Valley, northeast Thailand, in 1998 an unusual case of possible fatal cranial trauma in an elderly woman was recovered. Her skull was cleaved across the centre from side to side. The woman was buried with her head inside a ceramic pot, which is unusual for the site, but with jewellery similar to that in other burials. She was interred in a large cluster of graves, with a high proportion of infants and children. Her burial treatment suggests that she was not being treated punitively. The position of the mandible shows that the cleavage is not a postmortem artifact but it is not possible to determine the reason for it or whether it was the cause of her death or occurred immediately afterward. It is an unusual and intriguing enigma. Copyright © 2003 John Wiley & Sons, Ltd.  相似文献   
10.
东汉后期著名史学家荀悦的著作《汉纪》和《申鉴》中包含着卓越的史识。这主要表现他把历史看成是发展的,各种制度应适应时代与社会的发展而变化,统治者必须随时而变,随机应变。他认为考察历史问题应与具体的社会环境结合起来,具体问题具体分析,主张将不同的政治主张置于具体历史时空中探讨。他既能从整体上把握事物,从多角度加以探讨,又能考察事物的不同方面,分析其内在联系。他看到事物具有相对性的特点,主张通过比较把握事物的共性与个性,认为考察事物要透过现象看本质。他朦胧地意识到事物内部存在既相互对立又相互联系的两个方面,在人物评价中注意分析其两重性。荀悦的史识值得我们认真总结。  相似文献   
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