COMMUTING AS AN ELEMENT OF LOCAL POPULATION MOBILITY

Commuting is defined as journeys to work or study that cross the administrative boundaries of minor civil divisions. This poses problems in the statistical analysis of some metropolitan areas, such as Baku, where large suburban territories are administratively under the jurisdiction of the central city government. Time series on commuting exist for trips from rural to urban areas, and help distinguish oblasts and major economic regions of varying levels of rural population mobility. This mobility is highest around large cities that exert a strong pull (Moscow, Leningrad, Kiev, Minsk, Khar'kov, L'vov). Rural population mobility is low in Siberia and Kazakhstan, which have a sparse network of industrial centers and low rural population density, and in Central Asia, where the indigenous population is distinguished by low social mobility. Census data for commuting in 1970 yield a typology of cities in terms of the character of commuting. Commuting distances and means of transportation are analyzed for different city size classes.     

THE CHEMICAL COMPOSITION OF SOME ARCHAEOLOGICALLY SIGNIFICANT FLINT FROM DENMARK AND SWEDEN

Flint was one of the most widely employed raw materials for artefact manufacture in Denmark and Sweden during the Stone Age, and it continued to be used during subsequent periods. Prehistoric flint mining and lithic manufacturing studies in these countries have attracted considerable attention, but there have been no recent attempts to chemically characterize the geological source materials. This paper builds on a pilot study ( Hughes et al. 2010 ) and uses energy‐dispersive X‐ray fluorescence (EDXRF) analysis to determine quantitative composition estimates for nine major, minor and certain trace elements in seven archaeologically significant flint sources in Denmark and Sweden, along with new data on a number of other sources of prehistoric significance. These data provide a geochemical foundation for ongoing research devoted to determining contrasts and continuities in the time and space utilization of flint sources in Scandinavian prehistory.     

THE FORMATION OF PATINA ON FLINT

All known factors influencing the rate and character of flint patination have been investigated. They include the pH of the surrounding solution and the presence in it of sodium ions and chemicals of organic origin. After each treatment the flints were studied with a scanning electron microscope to determine the nature of the surface. The correct assessment of the above factors is essential for the derivation of reliable archaeological information from flint patinas.     

THE EFFECT OF PURIFICATION AND FIRING OF CLAYS ON TRACE ELEMENT PROVENANCE STUDIES

The effect of purifying, mixing and firing of clays on trace element concentration was systematically investigated using instrumental neutron activation analysis. Eight different clays from two sites in Crete were used together with sherds found around several kilns near the sites. Trace element analysis showed that the extent to which the concentration changes after purification and firing depends on the initial particle size and chemistry of the clay. The calcite concentration plays an essential role in this. An application is made using roof tiles found at the excavation of the ancient city of Pella in Macedonia.     

STONE AXES OF THE CHANNEL ISLANDS: NEOLITHIC EXCHANGE IN AN INSULAR CONTEXT

Summary. The petrology of stone axes found in the Channel Islands is examined. Recent research has resulted in the identification of an axe production centre at Le Pinacle, Jersey, and axes produced there have been recorded on Guernsey, Alderney and Sark. The Channel Island assemblages also include axes of Type A dolerite, flint, jadeite, eclogite and fibrolite, produced at known centres on the European mainland: together, these 'exotic' axes account for around 32% of the total Channel Island sample. A marked fall-off is noted between Jersey and the other islands in terms of the occurrence of these imported axes, and this can perhaps be explained in relation to factors affecting navigation. The social significance of inter-island and island/mainland interaction is explored.     

PREHISTORIC FLINT MINES AND THEIR IDENTIFICATION AS SOURCES OF RAW MATERIAL

This paper is a statistical and geological study of the results of analysis of flint from British and West European flint mines, carried out by emission and atomic absorption spectroscopy. Groups of flint specimens were studied from each geographically separate flint mining area. Flints were analysed for a group of easily measured trace elements shown by previous work to be generally present. The ratios between the trace elements form a consistent pattern for each flint mine and statistically valid differences of pattern can be recognized between different flint mines. A geological investigation shows that the measured trace elements may be derived from clay minerals and explains geographical and statistical variation in the composition of flint in terms of its mode of origin in the chalk. An advanced statistical technique allows individual flint specimens of unknown origin to be attributed by their composition to one or other of the identified flint sources. The archaeological implications of this study are discussed.     

关于摇钱树起源及内涵的研究

“摇钱树”一词,最早见于明冯梦龙的《警世通言》三二卷“杜十娘怒沉百宝箱”一文中。作为一个考古学名词,是我国著名考古学家冯汉骥先生,在四十年代对彭山汉代崖墓出土的一种随葬器物,进行研究后提出来的。六十年代,于豪亮先生《“钱树”“钱树座”和鱼龙漫衍之戏》一文在《文物》杂志上发表后,这一称谓便为考古学界所接受。     

ON THE INFLUENCE OF DRYING AND FIRING OF CLAY ON THE FORMATION OF TRACE ELEMENT CONCENTRATION PROFILES WITHIN POTTERY*

On experimentally fired briquettes made of five chemically and mineralogically different clays, trace element concentration profiles from the centre to the surface of the briquettes have been measured by Neutron Activation in order to examine if drying and firing of the clays lead to a mobilization and subsequent migration of single components within a sherd. Mineralogical changes during firing have been determined by X‐ray diffraction. Generally, no such migration could be found. For two clays, arsenic was lost from the briquette during firing, forming non‐constant concentration profiles. If NaCl is present in the clay paste, sodium migrates towards the surface. Additionally, in the special case in which the presence of NaCl coincides with that of calcite, the heavier alkali elements evaporate, forming significant concentration profiles within the sherd.     

THE UTILIZATION OF TRACE CHEMICAL COMPOSITION TO CORRELATE BRITISH POST-MEDIEVAL POTTERY WITH EUROPEAN KILN SITE MATERIALS

This study uses X-ray fluorescent analysis to compare the trace chemical composition of seventeen pottery sherds excavated from sites in Britain with the trace analyses of twenty four sherds from continental sources. Results indicate that certain elements, notably zirconium, titanium, rubidium, and strontium show little variation within a particular sherd and are consistent among samples from the same source. Certain other elements appear to show wide variation which is possibly attributable to firing conditions, burial or is connected with the glaze. The comparisons of analyses indicate that nine of the seventeen British sherds can be closely correlated with particular continental sources. Tentative correlation is suggested for five sherds. The remaining three sherds clearly do not come from any of the sources investigated.     

客源地—目的地关系质量对游客多分类旅游意愿的影响机制研究——以大陆赴台湾潜在客源市场为例

客源地—目的地关系和游客的旅游决策是旅游营销研究中的重要议题。本研究基于联想网络理论,构建了关系质量、多分类旅游意愿、游客风险倾向等变量之间的融合影响机制,以大陆赴台湾潜在客源市场为例,依托问卷调查数据,采用结构方程模型进行建模和检验。研究表明:(1)消极化的客源地—目的地关系质量通过直接效应和旅游形象的中介作用负向影响游客对目的地的旅游意愿(赴台旅游意愿);(2)消极化的关系质量负向影响游客的基础旅游意愿(出境旅游意愿),并强化了替代旅游意愿(非台湾旅游意愿)的替代作用;(3)低风险倾向游客的多分类旅游意愿受消极化关系质量的负向影响更强。本研究拓展了联想网络理论的应用领域,揭示了客源地—目的地关系质量对多分类意愿的影响机制。     

TRACE ELEMENT CONTENT OF ROMAN LEAD BY NEUTRON ACTIVATION ANALYSIS

The trace element contents of 13 lead pigs and 20 water pipes, all of Roman origin, were determined by instrumental neutron activation analysis. The contents of Cu, As, Ag, Sn, Sb, and Au were determined with an experimental reproducibility of ±7%; the analytical values are given for all samples. The results are discussed with respect to the homogeneity of samples, the difference between pipes and pigs, the difference between bulk and joint material in pipes, and the possible correlation of the trace element contents with the place of origin.