NON‐DESTRUCTIVE PORTABLE GAMMA RAY SPECTROMETRY USED IN PROVENANCING ROMAN GRANITOID COLUMNS FROM LEPTIS MAGNA,NORTH AFRICA*

Portable gamma ray spectrometry (PGRS) provides a non destructive means to analyst quantitatively large artefacts, such as building stones, for the radioelements K. U and Th. Nine Raman granitoid columns at the Leptis Magna Ruins in Windsor Great Park, London, were measured in situ by PGRS. Corrections for the environmental background contribution to the gamma ray flux measured, and for the shape and size of the columns, are described Comparison of the PGRS data with a radioelement data base for Roman granite sources indicates that most of the columns originated in the Troad area of Turkey. Two columns could not be unambiguously provenanced using PGRS alone because there is insufficient difference between radioelement concentrations in certain sources. However, non‐destructive measurements of magnetic susceptibility, used in conjunction with PGRS data, suggest that these two columns originated in the Kozak Daǧ, also in Turkey.     

西南夷地区A型曲柄短剑的功能、使用方式及命名

学术界对“A型曲柄短剑”的认识尚且模糊,以至于对其命名、功能及使用方式的看法存在一定的差异。作者通过对其进行细致的形制观察和出土状态分析。以及与西南夷系统和中原系统青铜短剑的比较研究,初步认为“A型曲柄短剑”是作为剑的复合型器物,即具有剑、戈、刀等多种功能和使用方式。     

三星堆一号青铜神树的三维数字建模与静力学分析

结构稳定性是评估文物安全的重要方面。三星堆二号坑出土1号青铜树体量庞大、结构复杂,且存在腐蚀、裂纹等危险因素,为了充分记录、评估其保存状况,本研究在原始几何形状和内部构造的基础上,利用三维数字建模技术,建立其几何模型和数值模型,并估算出青铜神树的质量分布和质心位置等无法实地测量的数据,并使用有限元方法,从应力和位移的角度分析青铜树的静置状态下的安全性。经过有限元模拟和材料力学简化计算,发现龙身和树干连接处、树枝根部应力较大,是易受损区域。     

对旅游本质的哲学辨析

对旅游本质的正确认识是关系到旅游学科建设和旅游业健康发展的重要命题,然而这一问题在学术界至今未能得到很好解决。从哲学的视角来辨析,旅游的本质应是“体验”,即旅游者的异地身心自由体验。将体验视为旅游本质的理由是：体验是旅游现象所具有的最一般、最普遍、最稳定的共同属性,体验是旅游现象区别于其他现象的独特属性,体验是规定和影响旅游现象中其他非本质属性的根本,体验是旅游活动产生、变化及发展的依据,这些理由符合哲学关于本质研究的特点及规定性。     

Reconstructing Life Histories Using Multi‐Tissue Isotope Analysis of Commingled Remains from St Stephen's Monastery in Jerusalem: Limitations and Potential

The examination of isotope ratios from multiple tissues offers new life to interpretations of commingled assemblages where information regarding individual biological history has been lost. Here, life histories from a commingled sample of Byzantine monks were reconstructed using enamel and bone δ¹³C and δ¹⁵N values. The δ¹³C values suggest a diet dominated by C₃ products, while the δ¹⁵N ratios indicate variable contributions of animal protein. After correcting for tissue‐specific enrichment factors, bone δ¹³C values were significantly enriched over enamel; this may be due to an increase in protein consumption, but could also reflect structural differences between tissues or correction factors used to compare these data.     

试论殷商时期的鸟兽形青铜酒器

青铜酒器是我国商周青铜器中的重要一类,它的出现可追溯至夏代晚期,在河南省偃师二里头文化遗址中已发现有爵、等酒器。商王朝建立后,随着青铜铸造技术的发展,青铜酒器的种类大大增加,出了现觚、、尊、觥、卣、瓿、觯、方彝等新的器类。商代后期,在尊、觥、卣这三类酒器中,除常见的圆形或方形的造型外,又出现了一种模拟鸟兽等动物形象的新形制。     

中国藏区脱贫与生态保护政策的联动性探讨

藏区是中国贫困发生率最高的区域之一,也是中国乃至世界最重要的生态区域,更是少数民族贫困地区最具典型意义的区域。避免扶贫和生态保护单一政策的制度缺陷,发挥二者间制度安排的联动效应,选择统筹发展路径,是藏区经济社会可持续发展的关键。