内蒙古阿尔寨石窟壁画制作工艺和颜料的分析研究

为了解阿尔寨石窟壁画的制作工艺和颜料成分,采用偏光显微镜分析、剖面分析,并结合X射线衍射分析对6个洞窟的23个样品进行了分析。为了进一步研究阿尔寨石窟壁画颜料,还通过偏光显微法对其他地区和年代的壁画颜料进行了对比研究。结果表明,其绘制方法是先用加有麦秸的粘土将洞窟壁面抹平,然后用石灰涂白。再施以彩绘。所使用的颜料为矿物质颜料,多为绿、白、红、蓝色等。其绿色颜料为氯铜矿,白色颜料为碳酸钙,红色颜料为朱砂和铅丹,蓝色颜料为石青。     

色度测量在文物考古中的应用

颜色的定量判断、描述和比较是文物考古中的重要内容。色度测量可以快速、准确、无损地获取研究对象的颜色数据,对其计算分析,可得到更多信息。目前,色度测量已被广泛应用于科技考古和文物保护的实际工作中。本文结合国内外文献,对色度测量方法在文物考古中的应用和研究现状进行梳理后发现色度测量能够有效地帮助解决以下问题:研究文物呈色机制和制作工艺;评价文物清洗效果和保护材料的颜色稳定性;分析环境因素对文物色彩的影响。随着色度学理论和方法的完善和发展,以及与其他分析技术和方法等的结合,优化的色度测量条件、对颜色数据计算处理后得到的文物色貌模型和数字颜色管理系统将在文物考古研究中发挥更大的作用。     

On the similarity of tree‐ring patterns: Assessing the influence of semi‐synchronous growth changes on the Gleichläufigkeitskoeffizient for big tree‐ring data sets

The Gleichläufigkeitskoeffizient (GLK), or the percentage of parallel variation (%PV), is an often used non‐parametric similarity measure in dendrochronological research. However, when analysing big data sets using the GLK, this measure has some issues. The main problem is that it includes not only synchronous but also semi‐synchronous growth changes. These are years in which the growth in one of the compared series does not change in two subsequent years. This influences the GLK, often only slightly, but the larger the data set the stronger the effect. The similarity between tree‐ring series can be more objectively expressed by replacing the GLK with the synchronous (SGC) and semi‐synchronous growth changes (SSGC). The calculation is similar, since GLK = SGC + SSGC/2. Large values of the SSGC are indicative of possible anomalies or even errors. The SGC is much better suited than the GLK to describe similarity. The SGC should therefore be used to analyse big data sets, for clustering and/or dendroprovenance studies. It is recommended to combine the SGC with parametric measures.     

Spatial influence of attractions on tourism development

Destination planning raises questions relative to spatial organization within the destination and to the spatial extent of the gains generated by attractions. Thus, it is important to increase understanding and knowledge of the mechanisms by which attractions generate tourism development. The aim of this study is to analyze how tourist attractions influence tourism development within destination and what the spatial extent of this influence is. It is argued that both the appeal of tourist attractions and their spatial characteristics are determining factors. Thus, distinguishing local, spread, and diffuse attractions is essential and specific indicators were created to that purpose. Using count data models, an econometric analysis was conducted in order to test the effect of attractions on the number of hotel rooms in 2015 on the one hand, and on the number of employees in the tourism sector in 2014 on the other, in French municipalities. The study brings several original results. First, as in the case of green areas, some attractions may trigger the emergence of tourism development but may also have a depressive effect on the level of tourism development when they exceed a certain threshold. Second, the influence of sport and leisure facilities is more limited in space than for ski slopes, beaches and tourist sites, which confirms that the appeal of attractions determine the spatial extent of tourism development. Third, beyond a distance threshold, some attractions can generate negative spatial spillovers and have a depressive effect on tourism development.     

An Investigation Into the Relationship Between Funerary Treatment and Bacterial Bioerosion in European Archaeological Human Bone

A central problem in funerary archaeology is interpreting how the corpse was manipulated in the immediate post mortem period. The extent of bacterial bioerosion to the internal bone microstructure has been proposed as a means to infer the early post mortem history of a corpse, as it has been suggested that this form of bone diagenesis is produced by an organism's putrefactive gut bacteria. Under this model, different forms of funerary treatment would be expected to leave characteristic signatures of bioerosion in archaeological bone. Here, we tested the extent to which bacterial bioerosion of ancient human bones reflected funerary treatment, through histological analysis of 301 archaeological human bone thin sections from 25 European archaeological sites. We found that bioerosion was significantly influenced by whether a bone originated from a neonatal individual or an anoxic context. When these remains were excluded, bioerosion was controlled by archaeological phase in a manner consistent with known early post mortem treatment and forensic models of bodily decomposition. These findings suggest that microscopic analyses of bone have useful applications in reconstructions of funerary processes and provide some insight into factors that may control the persistence of organic biomolecules and fossilization.     

Archaeological geophysics of a Bronze Age agricultural landscape: the AROURA Project,central mainland Greece

Between 2010 and 2012, the AROURA project conducted magnetometric prospection in the ancient polder around the Late Bronze Age (ca. 1300–1190 b.c.) fortress of Glas, mainland Greece. As had been hypothesized, the anomalies detected were consistent with a system of agricultural fields. This system appears to have been irrigated and drained through previously identified hydraulic mechanisms in and around the polder. Comparison of soil profiles of anomalies with those of background areas, including their magnetic susceptibilities, corroborated magnetometric data. Anomalies were traced from sampled to unsampled areas through corresponding reclassified satellite bandwidths. Constituent sediments of features discovered were dated to the Late Bronze Age through AMS radiocarbon and OSL analyses. The results validated the use of extensive geophysics to detect and investigate ancient agricultural landscapes.     

Dacura: A new solution to data harvesting and knowledge extraction for the historical sciences

New advances in computer science address problems historical scientists face in gathering and evaluating the now vast data sources available through the Internet. As an example we introduce Dacura, a dataset curation platform designed to assist historical researchers in harvesting, evaluating, and curating high-quality information sets from the Internet and other sources. Dacura uses semantic knowledge graph technology to represent data as complex, inter-related knowledge allowing rapid search and retrieval of highly specific data without the need of a lookup table. Dacura automates the generation of tools to help non-experts curate high quality knowledge bases over time and to integrate data from multiple sources into its curated knowledge model. Together these features allow rapid harvesting and automated evaluation of Internet resources. We provide an example of Dacura in practice as the software employed to populate and manage the Seshat databank.     

贵阳市道路拥堵状态时空分布规律研究——基于出租车GPS大数据

利用贵阳市出租车GPS数据,建立ArcGIS空间模型计算路段平均行程速度,以空间数据库和ArcGIS空间分析为技术支撑,分析道路拥堵状态的时空演化规律。结果表明：①路网平均行程速度的时间分布特征具有高度相似性,且工作日与休息日分布差异大;②工作日高峰时段拥堵区域分布主要以老城区为主。休息日总体上呈现离散分布趋势,且晚高峰时段交通状况比早高峰更拥堵;③工作日早高峰交通拥堵路段呈由中心核心区逐渐向外围扩散的趋势,晚高峰呈由外围向中心核心区聚拢趋势。休息日早高峰不明显,晚高峰呈现由外围区域向内聚拢趋势。基于上述时空演化规律,从城市功能分散、城市道路网、城市空间发展、城市公交系统等方面讨论了贵阳市城市道路交通优化调整对策。     

基于网络大数据的城市内部便利性供需空间特征研究——以南京市中心城区为例

基于便利性的城镇发展战略对于新型城镇化转型具有重要意义。着眼于城镇居民生活质量的提升,围绕供需维度构建便利性测度体系,以多源网络大数据为支撑,分析南京市中心城区便利性的供需空间特征。结果表明,中心城区便利性供需关系多样,空间分布大体类似,倾向于多类聚合分布,并呈现较为明显的圈层集聚特征;主城便利性多供小于求,副城则以低供需平衡及供小于求为主,各公共活动中心便利性发育水平不一;中心城区整体便利性供需水平不高,其空间分布在数量及连续性方面均呈现低供需平衡、低供-中需以及中供-低需依次降低的模式。