Chemical Residues as Anthropic Activity Markers. Ethnoarchaeology,Experimental Archaeology and Archaeology of Food Production and Consumption

ABSTRACT

Chemical residues preserved in floors can be considered anthropic activity markers. In fact, residues are strictly related to the activities performed and reflect their spatial distribution. We present a synthesis of the work carried out over the last few decades in Mexico and Italy related to the study of chemical residues in floors. Residues can be identified performing specific chemical analyses both of plastered or earthen floors samples. We outline a methodological approach concerning the use of the markers of the activities to interpret food production and consumption in the archaeological record, based upon evidence from experimental, ethnoarchaeological and archaeological examples. Here we point out the advantages and problems of such an approach, mainly related to equifinality, of the use of spot tests and gas chromatography coupled with mass spectrometry techniques using examples from different sites in the world.     

Wood exploitation and food supply at the border of the Roman Empire: the case of the vicus of Thamusida – Sidi Ali ben Ahmed (Morocco)

This paper presents the results of inter-disciplinary work drawing on archaeobotanical and archaeometric studies to trace the agroforestry landscape and the supply economy at the vicus of Thamusida in north-west Morocco at the border of the Roman Empire. The available data indicate the self-sufficiency of the settlement in both forestry and agricultural products throughout the period investigated from the end of the 1st century BC to the beginning of the 4th century AD. Charcoal data testify to the presence of a Quercus suber forest in the close surroundings of the site and its exploitation for a variety of forestry products such as timber, fuelwood, cork, and probably also leaves and acorns to feed livestock. The overwhelming presence of Q. suber in the archaeological layer investigated clearly indicates that this forest was under human influence prior to Roman occupation and was already partially degraded. Charred seed and fruit remains suggest that the diet of both troops and civilians was mainly based on locally grown products and that all the inhabitants of the site had access to good cereals such as barley, naked wheats and pulses with large seeds such as horse bean and pea; quality fruits, such as olive and grape, were also produced locally for fresh consumption. Organic residue analyses of the contents of ceramic vessels and plastered vats allowed archaeobotanical data to be complemented, thereby shedding light on some of the imports at Thamusida. Despite the remote location of this settlement, imported goods such as oil and wine were transported here in amphorae from different parts of the Empire.     

Methods and Challenges for the Seismic Assessment of Historic Masonry Structures

ABSTRACT

Despite the high vulnerability of historic structures to earthquakes, the approaches for evaluating seismic demand and capacity still appear inadequate and there is little consensus on the most appropriate assessment methods to use. To develop an improved knowledge on the seismic behavior of masonry structures and the reliability of analysis tools, two real-scale specimens were tested on a shake table, and several experts were invited to foresee failure mechanism and seismic capacity within a blind prediction test. Once unveiled, experimental results were simulated using multi-block dynamics, finite elements, or discrete elements. This article gathers the lessons learned and identifies issues requiring further attention. A combination of engineering judgment and numerical models may help to identify the collapse mechanism, which is as essential as it is challenging for the seismic assessment. To this purpose, discrete modeling approaches may lead to more reliable results than continuous ones. Even when the correct mechanism is identified, estimating the seismic capacity remains difficult, due to the complexity and randomness of the seismic response, and to the sensitivity of numerical tools to input variables. Simplified approaches based on rigid body dynamics, despite the considerable experience and engineering judgment required, provide as good results as do advanced simulations.     

Connecting to food: cultivating children in the school garden

School gardens are widely celebrated as spaces to promote health and sustainability by connecting children with their food. While scholars have assessed the effects of gardening in practice, media discourses play a key role in constituting this site. This paper examines how the school garden is discursively constituted within American and Canadian newspaper coverage. The analysis reveals specific forms of connection that are said to flourish in the school garden: between food production and consumption, between bodies and knowledge, and between the urban child and nature. While all children are said to benefit from connecting with their food, these connections are articulated differently in relation to particular bodies and spaces, evident in racialized and classed narratives of stewardship and salvation. As children’s relationship to food is invested with the hopes and fears of collective futures, the discursive construction of the school garden provides crucial insights into contemporary understandings of childhood.     

Frequencies of Rare Incisor Variations Reflect Factors Influencing Precontact Population Relationships in Mexico and the American Southwest

Mexican prehistory is characterized by migration and population isolation in its earliest phase, followed by later inter‐population cultural interactions, such as politics and trade. While shared, common morphological variants are often informative about recent population events, rare trait variants have not been widely investigated to see whether they might be informative about earlier events. Here, we consider populations that show several rare variants at frequencies high enough to warrant such an investigation. Examining past population structure can help us understand population interactions across different periods of time, levels of migration, and population isolation/drift. Multiple‐origin populations may have more variation, including more and higher rates of rare traits. We examined maxillary lateral incisors in 1117 dentitions from 76 samples of Preclassic/Classic and Postclassic pre‐European contact Mexico and the American Southwest for the prevalence of rare lateral incisor variants. Variants observed included barrel, congenital absence, interruption groove, mesial marginal bending, peg, reduced, supernumerary, and talon teeth. The most common variant overall is interruption groove. Central Mexico, Huasteca, and the Lowland Yucatan region samples present the highest overall number of incisor variants. Higher frequencies of single unusual traits are commonly found in samples from smaller populations, while samples from larger population centres show a greater range of these rare variants. We investigated to see whether the pattern of rare incisor variant frequencies reflected early or later population history by comparing similarity/distance matrices and factor model matrices using Mantel tests and Generalized Procrustes analysis. Results show a weak relationship with the Postclassic period and shared migration/language and trade interaction models. We suggest that later cultural interactions have acted to mask earlier population history. Research on serial founder effects should be approached multiregionally and across time, to avoid missing inter‐region biological relationships. Copyright © 2015 John Wiley & Sons, Ltd.     

邻里环境感知对中国城市居民自评健康影响研究——以武汉市为例

邻里作为城市居民的重要日常生活场所，对健康的影响引起广泛关注。本文选取武汉市南湖街道这一典型住区，运用多元回归分析，针对商品房和保障房邻里展开对比研究，解析不同类型邻里中居民的邻里环境感知对自评健康的影响差异。研究发现，控制个人因素后，体育休闲设施感知、归属感和安全感显示出对自评健康独立且显著的影响。而在对比研究中，商品房邻里的居民自评健康受邻里环境感知的影响较显著，而保障房邻里的居民自评健康受个体层面特征的影响较显著。因此，宜针对不同类型邻里制定差异化的社区健康提升策略。     

基于加权平均旅行时间的浙江省交通可达性时空格局研究

以浙江省69个县(市)为研究对象,利用1996、2004、2012年路网数据,借助ArcGIS网络分析功能,采用基于城镇综合发展水平的加权平均旅行时间指标,探讨浙江省综合交通网络中节点城镇可达性及其时空演变特征。研究结果表明:①1996-2012年,各城镇可达性均出现不同程度提高,彼此间联系趋于紧密;②城镇可达性存在空间分异,且提升幅度各异,均衡化趋势明显;③城镇可达性空间格局变化大,逐渐向以"四大都市区"为中心向四周递增的"∏型"多级空间结构转变。总体上来看,城镇可达性变化及空间格局演变体现了区域统筹发展的战略要求。     

地图投影与全球地缘政治分析:一种空间认知的视角

地缘政治分析离不开地图。在全球地缘政治分析中,作为世界地图基本空间框架的地图投影通过变形为人们架起了一座"认知的桥梁"--一种空间认知的视角,包括结构、中心方位、距离和面积四种认知。它们在人脑中组合成世界意象地图,为全球地缘政治分析营造了一个多维的空间思维条件。世界观念研究、地缘动态研究,地区研究和全球性问题研究都离不开全球地图投影。总之,地图投影对于国际关系研究具有重要价值。     

An analysis of Folsom projectile point resharpening using quantitative comparisons of form and allometry

A sample of Folsom points from the Southern Plains of Texas and New Mexico is analyzed quantitatively in order to assess patterns of point resharpening in relation to distance to raw material source area and evaluate models of how resharpening was accomplished in terms of point design. A newly developed digitizing method is used to capture 12 interlandmark characters from coordinate data to describe point form. Principal components analysis is used to investigate size and shape variation in point form, and the symmetry and allometry of characters are used to explore the effects of resharpening on point dimensions. Size allometry illustrates the degree of association of relative point proportions, and other aspects of point form, with point size. Blade length, the leading edge of the weapon, was found to be isometric with point size, suggesting that this character was critical to the proper functioning of weapon tips. The regulation of blade length to point size supports a fixed-in-haft model for Folsom point resharpening. Multivariate analyses show that reduction in point forms do not correlate with distance-to-source but are more consistent with the model of the cyclical resharpening and replacement of points. This research illustrates that multivariate and allometric analyses are useful methods for investigating models of technological organization and the effects of resharpening on point form.     

Evidence of early tobacco in Northeastern North America?

While tobacco use was a widespread and important social practice among Native Americans during the Historic Period, the prehistoric origins of the practice are poorly understood. Smoking pipes significantly predate botanical evidence of tobacco in Eastern North America. A promising technique for addressing this problem is gas chromatography/mass spectroscopy (GC/MS) analysis to identify nicotine or related compounds in smoking pipe residues. GC/MS analysis of a smoking pipe dating to approximately 300 B.C. from the Boucher Site, a Middlesex-complex site from Vermont, has produced evidence of nicotine decay products. This is interpreted as evidence for an Early Woodland Period origin for tobacco use in Eastern North America. The cultural and chronological implications of this finding are discussed.