A DAMAGE MODEL FOR THE ANALYSIS OF THE SEISMIC RESPONSE OF MONUMENTAL BUILDINGS

In this paper the Author proposes a damage model for the analysis of masonry plates and shells, which is based on an improvement of a previous constitutive model. The modifications introduced, connected to the head joint damage, allow us to study the influence of masonry texture on the damage modes once the mechanical characteristics of the elements constituting the masonry and the results of tests on simple assemblages are known. Having a nonlinear constitutive model is certainly one of the basic elements for understanding the damage mechanisms in masonry buildings. If, in fact, an elastic-linear constitutive model may be used under normal loading conditions, in critical situations it is necessary to model the damage and the dissipation mechanisms that occur between the elements, stone (brick) and mortar, in correlation with their characteristics and kind of masonry. To validate the model a comparison is made between the numerical and experimental results, in the case of tests available in the literature in masonry panels subjected to out-of plane loading and in a real structure through the observation of the damage in Umbria (Italy) surveyed after the 1997 earthquake.     

SOIL PHOSPHATE ANALYSIS: A NEW TECHNIQUE FOR MEASUREMENT IN THE FIELD USING A TEST STRIP*

A new method for soil phosphate analysis has been developed for field measurement which will increase the applicability of phosphate mapping in archaeological prospection.     

THE ACCURACY OF THE SPECIFIC GRAVITY METHOD FOR THE ANALYSIS OF GOLD ALLOYS

Two possible sources of error in the measurement and interpretation of the specific gravities of gold coins are investigated. First, the effect of the presence of copper was measured and found to be more significant than previously thought. It is shown that the presence of 5% of copper in a gold-silver alloy results in a measured gold content which is 3.3% too low when the coin is analysed by the specific gravity method. Secondly, the importance of cleaning the coins before measuring the specific gravity is also demonstrated.     

社会资本影响区域经济增长的机理:基于"织网"模型的分析

社会资本对区域经济增长的影响是通过对区内企业、产业集群及区域整体等三个不同主体的影响发挥作用的。在企业由传统成长模式向网络化成长模式转变,产业集群由聚集经济向创新网络转变,区域由空闻结构向网络社会转变的过程中,社会网络及内含资源起着决定性作用。社会资本对三者的作用体现空间上的层次递进特征,即依循企业、集群、区域三个不同主体网络化递进发展的“织网模型”,依次由“发散状企业网络”向“经纬状集群网络”再向“多构面区域网络”发展的织网过程。社会资本及社会网络对企业的作用是摄取关键资源、信息等;对产业集群的影响是建立学习与创新机制、成本节约机制、形成合作竞争氛围;而对区域的积极意义是保持区域良好的信任文化。     

西藏城镇发展环境分析

西藏特殊的地理位置、自然条件、发展历史和地域文化构成了其独特的发展环境,环境的特殊性深刻地影响着西藏区域发展及城镇建设的历史、现在和未来。本文分析了西藏城镇发展的自然环境、历史文化背景和社会经济环境等方面较为突出的特征,据此提出了今后西藏城镇发展和建设应该重视和解决的七个方面问题及其解决思路。     

OBSIDIAN HYDRATION DATING: AN IMPROVED OPTICAL TECHNIQUE FOR MEASURING THE WIDTH OF THE HYDRATION RIM

A simple optical method is described that will enhance the color contrast between the outer birefringent hydration rind and the inner unhydrated core on obsidian thin sections used for hydration dating. The technique utilizes a gypsum nccessory plate. The gypsum plate rotates all incoming light by 550nm causing the black isotropic core of the nhsidian to become transparent first-order pink and interacting with the transmitted light from the birefringent rind, by either addition or subtraction. to produce a second-order blue or a first-order yellow color.     

内蒙古阿尔山森林资源枯竭型城市转型战略决策量化分析

本文通过对阿尔山市实际情况分析基础上,采用层次分析法(Analytical Hierarchy Process),通过建模、计算,对阿尔山市资源枯竭转型战略作了定量化分析,得出以下结论:在相当长的时期内,阿尔山追求生态效益应是第一位的,因此加强森林资源环境的保护与生态治理是首要战略目标,且加强森林养护与生态功能建设是第一重要的发展战略;当前亟待解决的首要发展问题是森林资源枯竭及生态环境恶化、林业系统体制矛盾及资金欠账严重,应采取的重要措施是依托国家政策尽快建立生态补偿机制及衰退产业援助机制,加快阿尔山林业企业的资产剥离重组,理顺政府与林业局关系,进而培育以"绿色"为主题的接续产业体系。     

A NEW METHOD FOR THE DETERMINATION OF THE PROVENANCE OF WHITE MARBLES BY CHEMICAL ANALYSIS OF INCLUSION FLUIDS: THE MARBLES OF THE MAUSOLEUM OF BELEVI/TURKEY*

A new method is presented in this paper to pinpoint the origin of white marbles using the chemical analysis of fluids occurring as micro-inclusions in calcitic or dolomitic marbles. Beside the conventional methods usually applied for this purpose, the analyses of significant anions and cations in fluids extracted from white marbles were used to characterize different types of marbles. Using this new approach it is possible to distinguish different groups of marbles which cannot be separated isotopically. A case study was performed on the mausoleum of Belevi, close to Ephesus in Turkey, and the quarries in the area of the mausoleum. The marbles used for the architecture of the mausoleum cannot be distinguished isotopically but were split into two groups when using fluid inclusion analysis. The corresponding quarry for the high-quality marble (cella walls, columns etc.) turned out to be the Kentli Çiftliği quarry, which also supplied the marbles for the classical Artemision. According to the chemical and fluid data it can be shown, however, that neither the adjacent famous antique quarry of Belevi nor the underground mine of Kusini, some 5 km away from the mausoleum, are the sources for the marbles used for the construction or decoration of the mausoleum.     

THE SUBTRACTION TECHNIQUE OF THERMOLUMINESCENT DATING

Combination of the routine approaches of thermoluminescence dating, the fine-grain and inclusion methods, allows an age to be determined that is independent of knowledge of the environmental dose-rate. This socalled subtraction technique is exampled by several terracottas of museum origin and some pottery collected from archaeological contexts without associated burial media. Age determination is estimated to have an accuracy of around ± 12%, in favourable conditions.     

A LOW DILUTION,WAVELENGTH-DISPERSIVE X-RAY FLUORESCENCE PROCEDURE FOR THE ANALYSIS OF ARCHAEOLOGICAL ROCK ARTEFACTS

A method is described for the analysis of archaeological rock artefacts which provides major and trace element data. Wavelength-dispersive X-ray fluorescence (WDXRF) analysis of 2:1 fusion beads permits the accurate and precise measurement of a wide range of elements. Accuracy and precision are nominally 1-5% for elements having concentrations above 3 times the detection limit. The method requires a much smaller sample size than conventional WDXRF procedures and has been successfully used to characterise early millstones; a number of other applications in archaeology are suggested here.