Evaluating copper isotope fractionation in the metallurgical operational chain: An experimental approach

Until today, raw material information of copper (Cu) objects is mostly gained from impurities and trace elements and not from the Cu itself. This might be obtained using its stable isotopes. However, isotopic fingerprinting requires the absence of fractionation during the smelting process. The Cu isotope evolution during outdoor smelting experiments with Cu sulphide ore was investigated. It is shown that external materials, in particular furnace lining, clay, manure and sand, alter the isotopic composition of the smelting products. Cu isotopes are fractionated within low viscosity slag derived from matte smelting. The produced metallic Cu has a Cu isotope signature close to the ore.     

20世纪20年代平教运动与现代国民教育——以平民千字课本为中心

从本质上讲,中国现代平民教育运动是一场国民教育运动。20世纪20年代公民教育运动兴起后,晏阳初等人虽然也曾致力于此,但无论从其思想认识还是从社会实践上看,均不出国民教育的范围。平民教育运动在塑造现代国民方面的主要贡献,是向底层社会播散现代国家观念和国民意识,这从当时编写的平民千字课本中可以看出来。平教运动期间通过平民千字课向底层社会播散现代国家观念与国民意识的做法,对我们今天完成民族复兴大业,仍有着重要的借鉴意义。     

Managing mass migration after the war: The case of Sarajevo’s unification in 1996

This study analyses the immediate consequences of the transition from war to peace in Sarajevo, the capital city of Bosnia–Herzegovina. It focuses on the management of a tense security situation related to the postwar unification of the city, which was divided between warring belligerents during the Bosnian conflict. Firstly, it shows how ethno-nationalist leaders' visions and practices of ethnic homogenization continued after the end of the war as the result of the Dayton Peace Agreement (DPA). The principal tool of their postwar ‘ethnic engineering’ endeavour was to maintain and generate an atmosphere of fear, based on anticipated discrimination, maltreatment, and persecution from former belligerents. Secondly, this study explores how experienced wartime violence and related transformations in personal identities and social positioning activated latent boundaries between groups and made individuals more disposed to forms of group identification. As a result, the mass migration of people out and into Sarajevo strengthened the grip over the territories assigned to former adversaries by the DPA. This article argues that studying the mutually constitutive roles of the elite's ethnic engineering as well as ordinary people's experiences is necessary to understand how organised wartime violence transformed into structural, institutional, and other less visible forms during the postwar period. Ethno-nationalists’ discourses and points of view demonstrate how wartime violence channelled the postwar lives of Sarajevo's residents into a desired spatio-political arrangement.     

Bayesian modelling of an absolute chronology for Egypt's 18th Dynasty by astrophysical and radiocarbon methods

Only a few astrophysical points and synchronisms listed in texts provide anchor points for the absolute chronology of Ancient Egypt. At first we will show how we can re-calculate some of these anchor points by using Sothic dating based on the arcus visionis method, and modelling lunar dates using a Bayesian approach. Then, we will discuss two radiocarbon studies carried out on short-lived Egyptian materials held at the Louvre Museum that could be attributed to particular reigns or other precise periods. Using a Bayesian approach, these dates were combined with the known order of succession and the lengths of reigns. Sothic and lunar dates were integrated as priors in the model. This approach has led to a new proposal for the absolute chronology of Egypt's 18th Dynasty.     

Molecular evidence of bitumen in the Mousterian lithic assemblage of Hummal (Central Syria)

Evidence for bitumen use in Middle Palaeolithic sites is an exception in Pleistocene archaeology. This paper presents the discovery of three tar-bearing Levallois artefacts found in the Mousterian sequence in Hummal (Central Syria). The organic residues were submitted to geochemical study. Gas chromatography–mass spectrometry analyses of saturated and aromatic hydrocarbons and isotopic data show the presence of bitumen. The most likely location of natural asphalt provisioning is the Shaaf outcrop in the Bichri desert. The bitumen-bearing stone tools add further important data to the growing knowledge about bitumen processing in the Middle Palaeolithic spring sites of El Kowm. Identification of the provisioning place for natural asphalt enables a more precise assumption about the site's catchment area. From a technological point of view, the tar-bearing specimens provide information on the range of tool forms selected for hafting. Ballistic features arguably indicate that the pointed Levallois blanks seem to be spear points that were fitted to a wooden handle. In at least one case, this technical procedure was seemingly executed during a brief episode of occupation and replacement of worn out implements. This small, bracketed window of detailed insight into Mousterian technology is linked with the more general relationship between Levallois technology and stone tool hafting.     

Physical and Numerical Approaches for the Optimal Insertion of Seismic Viscous Dampers in Shear-Type Structures

This article presents the results of an exhaustive parametric analysis which compares the performances offered by various systems (which lead to both classical and non classical damping matrices) of added viscous dampers in shear-type structures. The aim of the research work here presented is the identification of the system of added viscous dampers which maximizes the dissipative properties under an equal “total size” constraint. The choice of the systems of added viscous dampers considered in the comparison is carried out both using a numerical approach (based upon the use of genetic algorithms) and a physically based approach (based upon the properties of classically damped systems). The comparison is carried out through the numerical evaluation of the dynamic response of representative shear-type structures to both stochastic and recorded earthquake inputs. The results obtained using both approaches indicate that a damping system based upon the mass proportional damping component of the Rayleigh viscous damping matrix (referred to as MPD system) is capable of optimizing simultaneously a number of different performance indexes, providing the best “overall” damping performances. The MPD system is characterised by viscous dampers (a) which connect each floor to a fixed point and (b) which are sized proportionally to the corresponding floor mass.     

便携式X射线荧光现场分析壁画颜料适用性研究——以西藏拉萨大昭寺壁画为例

便携式X射线荧光光谱仪作为快捷的无损分析技术,广泛应用于壁画文物的现场分析中.本文利用便携式X射线荧光光谱仪分析了西藏拉萨大昭寺转经廊壁画,选取部分样品,利用实验室X射线荧光分析,发现所分析颜料的主要显色元素具有一致性,并利用拉曼光谱确定了壁画颜料的成分.通过比较研究,发现便携式X射线荧光光谱仪可确定大部分色彩较为纯正的颜料的成分,同时,由于西藏拉萨大昭寺壁画颜料的杂多性,对于含砷的橙色颜料、含砷或含铅与含铁的黄色颜料、含铜砷的绿色颜料、含钙硫的白色颜料、群青与孔雀石的混合颜料则需结合拉曼光谱确定之.本研究工作显示,利用便携式X射线荧光光谱仪开展现场检测,可极大地减少实验室分析样品的取样数量,有利于壁画颜料的无损分析与微损分析.     

关于群众性文物工作往事与再认识

本文撰写于2011年,通过国家文物事业管理局在红安县召开座谈会,总结交流群众保护文物的情况和经验,与河北省贯彻座谈会精神,开展群众保护文物工作情况等,对开展群众保护工作提出五点再认识,指出它本质上是在文物保护工作中贯彻党的群众路线,对文物工作是带有根本性的问题.     

Hits and misses when throwing stones at mass analysis

Mass Analysis (MA), a well-recognized method of flake debris analysis, has generated significant interest in size-grade variables for investigating prehistoric lithic technologies, criticism of such usage, and combination methods developed to address some of those criticisms. A recent critique concluded that there are significant sources of error that preclude the use of MA for investigating prehistoric assemblages. We disagree with this generalization, but recognize that uncritical application of MA by non-lithic specialists is unlikely to yield useful results. Confusion as to what constitutes MA versus other size-grade approaches is a significant consideration. We address these issues as well as replicator variability, raw material, debitage mixing, diagnostic signatures, and the necessity of multivariate analysis in demonstrating that in many cases the attacks on MA are based on faulty evidence or are misguided. We advocate the use of a multiple lines of evidence approach that incorporates aspects of MA. Continued experimentation and application to particular archaeological assemblages in a cyclical fashion is necessary to explore more fully the utility of MA.     

Identification of psychoactive alkaloids in ancient Andean human hair by gas chromatography/mass spectrometry

Various ethnographic sources have demonstrated the symbolic and ritualistic importance of psychoactive plants in Native American societies. The social milieu of these mind- altering plants appears to be ancient. Archaeological evidence during the Tiwanaku empire expansion along the Atacama Desert of Chile, circa 500–1000 A.D., shows the presence of highly decorated snuffing tablets and tubes as grave goods. The preservation of mummified human bodies in the Azapa Valley, northern Chile, provided an opportunity to test the exact nature of the psychoactive plants used in this region. Using gas chromatography/mass spectrometry (GC–MS), here we show that ancient Andean populations from northern Chile consumed Banisteriopsis, a vine that contains harmine. This is the first direct archaeological evidence of hallucinogenic and medicinal ethnographic practices. Interestingly enough, this rainforest plant does not grow along the Atacama coast, thus our findings suggest extensive plant trade networks in antiquity as far as the Amazon.