MEAN SHIFT: A NON‐PARAMETRIC ALGORITHM FOR THE SEGMENTATION OF ANOMALIES IN GEOPHYSICAL IMAGES OBTAINED FROM MAGNETIC PROSPECTION DATA

This paper studies the applicability of the Mean Shift algorithm as support in interpreting geophysical images produced, on this occasion, from magnetic prospection data. The data obtained from a magnetic survey carried out in Gilena (Seville province, Spain) by the La Rábida Archaeophysics Group will be used for the research. Its applicability is illustrated by comparing, on the one hand, some reduction‐to‐pole algorithms and on the other, the (well‐known) k‐means algorithm. Finally, the paper shows the results obtained by applying the Mean Shift algorithm as an alternative method to ‘unsupervised clustering’ of anomalies that appear in images obtained from geophysical data, in which the a priori knowledge of the number of classes is difficult or impossible.     

Environmental Degradation of Russian Coastal Regions: Exploring the Gulf of Finland

An American geographer and Russian ecologist discuss current and prospective environmental hazards precipitated by large-scale infrastructure projects on Russia's southern coast of the Gulf of Finland. The region, investigated by both authors during the course of regular field research from 1999 to 2009, is one of the best environmentally preserved coastlines of the Baltic Sea with abundant potential greenfield sites, largely due to its closed-border-zone status during the Soviet period. A favorable location for trade also places the region under intense development pressure. The authors devote particular attention to two major developments, a multifunctional port complex (which inter alia serves as a major pipeline terminus and oil export port) and expansion of an existing nuclear power plant. Based on extensive personal observations and government documents, they analyze the emerging environmental threat posed by these initiatives as well as the challenging political environment that discourages public participation and local involvement in spatial planning.     

九连墩墓地1、2号墓出土青铜器上锈蚀产物分析

采用XRD、XRF和显微照相等方法,测试分析了九连墩1、2墓中出土青铜器锈蚀产物的成分和物相组成,发现该产物的物相主要为氧化亚铜.结合埋藏环境土壤的理化分析,探讨了这些锈蚀产物的形成原因,以及其对青铜文物的影响.同时使用XRD分析方法研究了这批青铜器在大气中的腐蚀情况,发现了一部分文物已经滋生了"粉状锈".     

Environmental and Resource Degradation Associated with Small‐Scale Enterprise Clusters in the Red River Delta of Northern Vietnam

The paper reports on an empirical study of the environmental and resource degradation observed in small‐scale handicraft clusters in the Red River Delta of northern Vietnam. Most entrepreneurs in these clusters face important challenges, including depletion of natural resources, linked to acute shortages of capital and land. Such issues are identified as the main cause of overcrowding, poor working conditions and extreme environmental degradation. The study also highlights some industrial ecology practices at the enterprise level, and assesses the role played by the government in providing incentives for enterprises to invest in new technology and pollution control. Drawing from the analysis of a questionnaire survey of 56 handicraft enterprises, the study identifies the major constraints they encounter in adopting new environmentally clean technologies and engaging in environmental management. Shortage of capital and lack of knowledge about the benefits of new technologies were viewed as the most important barriers, followed by shortage of skilled workers, poor market conditions and scarcity of land appropriate for industrial production.     

现代中国环境考古研究模式的分析

本文将1987年以来的中国环境考古研究称为"现代中国环境考古研究",并将之归纳为"考古地理的环境考古研究模式"、"文化历史环境考古研究模式"和"资源环境考古研究模式"。本文对这三种研究模式的合理性进行了分析。接下来,从考古学的基本理论假设出发,指出环境考古学、文化历史考古学之间并没有严格的继承关系,中国环境考古研究的最大问题是核心概念的不匹配。最后,通过考察西方环境考古研究和考古学史,本文提出应该用文化适应,即"考古学中的文化"取代考古学文化而将之作为核心概念进行环境考古研究,让中国环境考古摆脱文化历史考古学概念体系的束缚。     

Exploring Geographic Origins at Cahuachi using Stable Isotopic Analysis of Archaeological Human Tissues and Modern Environmental Waters

In this study, we used oxygen‐ and hydrogen‐isotope data from human bone (δ¹⁸O) and modern environmental water samples (δ¹⁸O and δD) to investigate geographic origins of individuals buried at Cahuachi, a ceremonial centre in the Nasca region of Peru (c.AD1‐1000). Our objective was to characterise the natural variation in water stable isotopic composition in the Rio Grande de Nasca drainage, and then to use these data to better infer place of origin for 30 adults interred at Cahuachi. Using the δ¹⁸O and δD values of 63 modern environmental water samples, it was possible to differentiate among the northern and southern river middle valleys, and to infer the isotopic composition of drinking water at higher elevations. Over half of the individuals included in this study had drinking water oxygen‐isotope compositions consistent with places of origin away from Cahuachi during the last 10 to 25 years of life, perhaps in the northern river middle valleys or in the upper valleys/sierra. The environmental water stable isotopic baseline developed in this study enabled a better understanding of the natural variation of waters in the Rio Grande de Nasca drainage. As a result, it was possible to assess the geographic range of place of origin for these individuals with greater certainty. Taken together, these data support the idea of Cahuachi as a place of both local and regional significance, with individuals from distant parts of the Rio Grande de Nasca drainage travelling to and/or transporting the dead to the site for death or burial. Copyright © 2011 John Wiley & Sons, Ltd.     

Chemical Alteration and Use of Beeswax Through Time: Accelerated Ageing Tests and Analysis of Archaeological Samples from Various Environmental Contexts

In order better to interpret the chemical composition of ancient organic residues and artefacts containing beeswax, the degradation of this raw material was accelerated in the laboratory by controlled heating. During the course of degradation, deposits were condensed above the beeswax. Both degraded beeswax and these deposits were analysed. These experiments definitively proved that n‐alkane depletion is due to a sublimation process that depends on the molecular weight of these hydrocarbons. The formation of benzoic and cinnamic derivatives due to the degradation of flavonoid precursors initially present in beeswax has also been highlighted for the first time. The analysis of samples from Neolithic and Roman periods led to the identification of beeswax characterized by different degradation patterns linked to their environmental context.     

Further Insight into Mesoamerican Paint Technology: Unveiling the Colour Palette of the Pre‐Columbian Codex Fejérváry‐Mayer by Means of Non‐invasive Analysis

Here, we report on the analytical findings and their cultural implications of a multidisciplinary study of the pre‐Columbian Codex Fejérváry‐Mayer. Today conserved at the World Museum in Liverpool, it is one of the finest Mesoamerican codices among the few extant. Thanks to the exploitation of non‐invasive analytical methodologies accessible through the MOLAB European mobile facility, the study allowed us to disclose the chemical composition of the painting materials used in the codex, which have never been analysed before. The results are discussed and compared with the outcomes of previous studies on other Mesoamerican codices.     

Monitoring to Learn,Learning to Monitor: A Critical Analysis of Opportunities for Indigenous Community‐Based Monitoring of Environmental Change in Australian Rangelands

Indigenous community‐based monitoring has been a central feature in many international attempts to improve monitoring of and local adaptation to environmental change. Despite offering much promise, Indigenous community‐based monitoring has been underutilised in natural resource management in Australia, particularly within the remote, semi‐arid rangelands. This paper discusses contextual social and environmental factors that may help to explain this apparent deficiency, before critically analysing key stakeholder perceptions of the roles for, and challenges of monitoring in the Alinytjara Wilur ara Natural Resources Management region in the north‐west of South Australia. The analysis guides a discussion of responses to better integrate monitoring in general, and Indigenous community‐based monitoring in particular, into regional environmental management approaches. We argue that community‐based monitoring offers a range of benefits, including: better coordination between stakeholders; a heightened ability to detect and respond to climatic trends and impacts; the effective utilisation of Indigenous knowledge; employment opportunities for managing and monitoring natural resources; and improved learning and understanding of rangeland socio‐ecological systems. Identified opportunities for spatial and temporal community monitoring designed for the Alinytjara Wilur ara region could be of value to other remote rangeland and Indigenous institutions charged with the difficult task of monitoring, learning from, and responding to environmental change.     

基于Amos的环境地方性与游客地方感之间的关系机理分析——以西安大明宫国家考古遗址公园为例

本文以西安大明宫国家考古遗址公园为例,基于空间形态要素、公园景观要素、服务配套要素、地方性、地方感5个潜在变量,构建地方性与地方感之间的因果关系结构方程模型.通过预设观测变量因子设计量表,发放200份调查问卷,回收181份有效问卷,再运用SPSS建立有效分析数据库,并基于Amos7.0平台进行结构方程模型的验证性分析,从而探讨大明宫国家考古遗址公园空间环境营造的地方性特征与游客地方感之间的关系路径及运行机理.