Schmidt hammer rebound hardness tests for the characterization of ancient fired clay bricks

This article presents results of non-destructive Schmidt hammer tests performed on ancient fired clay bricks sampled from historical masonry. These tests were carried out in order to evaluate, and compare, the different degrees of degradation, depending on the bricks’ specific exposures and locations within a wall. The results indicate that this technique is sensitive enough to distinguish sample locations and measure weathering differences, even for different surfaces of a particular sample. For each case study, referenced surfaces were tested for bricks from a facade or interior wall. Each surface was tested with a Schmidt hammer type LB at ten different points of measurement, and these measurements were repeated ten times. For each impact at a particular point, a mean rebound value was calculated to provide an index of the degree of brick-surface microweathering.     

内蒙古自治区农村人口多维贫困特征测算与分析

针对国家精准扶贫需求,构建基于A-F双临界值法的多维贫困度量模型,进行内蒙古自治区农村人口多维贫困特征的总体测算与分析,并分别分析多维贫困的空间集聚效应及不同分类体系下的贫困分异特征。结果显示:①研究区西部存在大面积高度贫困县单元,中部存在呈东西条带状分布的中度贫困县单元,东部地区贫困程度呈现"南高北低"状态;②研究区主要致贫因素为:人均纯收入、家庭健康、平均教育年限,一般致贫因素为燃料类型、资产、房屋结构,次要致贫因素为:饮水情况、通电情况、儿童入学率;且大部分贫困指标呈显著空间集聚效应;③研究区西部县际贫困特征差异较小,东部存在显著的南北分布差异;④不同类型县各贫困指标差异不同。     

The body weight of AL 288-1 (‘Lucy’): A new approach using estimates of skeletal length and the body mass index

A method of estimating the body mass of hominids by use of the skeletal length and physique index is described. The body mass indices (BMI) of female humans and female chimpanzees are known and this permits an estimate of the probable BMI for the female common ancestor and thus for female morphs intermediate between the common ancestor and modern humans. AL288-1 (‘Lucy’) probably had a BMI of about 22.3 kg m⁻² and for a height of 105cm this yields a body weight estimate of about 25 kg. Body weight estimates of 28–29 kg would imply a body mass index similar to female chimps and are improbable. These conclusions will be compromised if the chimp–gorilla–homo phylogenetic relationship proves to be a trichotomy rather than a chimp–homo dichotomy.     

Early prehistoric sedentism and seasonal animal exploitation in the Caribbean lowlands of Colombia

San Jacinto 1 represents a special-purpose settlement that was used by late Archaic foraging groups who logistically moved from base camps to special-purpose camps in order to collect and process subsistence resources at the onset of the dry season in the Caribbean savannas of northern Colombia. Situated in an optimal location for permanent water and seasonal concentrations of dry season subsistence items, the site’s location was part of a logistic strategy in which specific task groups were moved to resources during a short season of availability. Preserved vertebrate and invertebrate faunas at San Jacinto conform to expectations about assemblage ubiquity, richness, and evenness or equitability within the early occupational strata at the site. Specific animals including turtles and fish were pursued, and may have been processed with C3 plants and grasses in ubiquitous earth ovens. Certain local aquatic invertebrates were also procured along with the collection of specific extra-local gastropods.     

Defining “Talent”: Insights from Management and Migration Literatures for Policy Design

Taking the case of defining “talent,” a term that has been widely used but its definitions differ by discipline, organization, policy sector, as well as over time, we demonstrate how the basic definition of a policy subject may affect policy design and the assessment of policy outcomes. We review how “talent” is defined in two sets of literature, talent management and migration studies, and find that definitions fall under one of two categories: binary (“talent” as qualities) or composite (“talent” as a relational concept). The implications of our findings are epistemological and ontological; the findings point to diverse epistemological effects of definitions through developments of indicators, as expected, and they also reveal the policy designers’ ontological starting points. Ontological perspectives are significant because they ultimately determine whether the policy assessments carried out differ in degrees or in kind. In the case of defining “talent,” this means determining which objectives the designers would set (e.g., recruiting vs. cultivating vs. introducing competition), the policy instrumentation for achieving the goals (migration measures vs. education vs. lifelong learning vs. human resource policy), and the type of assessment for measuring policy outcomes (single vs. multiple indicators, qualitative vs. quantitative).     

Evaluating indices of curation for Archaic North American bifacial projectile points

Abstract

This paper addresses the definitions of the term “curation” and the utility of various techniques for its quantification based on morphometric, isometric, and geometric characteristics of bifacial projectile points. The definitions were evaluated through the comparative application of curation indices to a collection of Archaic projectile points from the Southwestern United States. Bifacial projectile points from the Walt Jones Farm site (10Br9), Georgia, were analyzed with the accompanying debitage using curation indices and non-indexical measures. Comparisons of the curation indices with non-indexical measures allow an examination of the utility of the term “curation,” and we argue that indices of curation cannot operate in a vacuum without additional information concerning an assemblage.     

New Indices for the Existing City-Centers Streets Network Reliability and Availability Assessment in Earthquake Emergency

During earthquake emergencies in existing city-centers, streets network permits inhabitants to reach safe areas, and rescuers to access damaged zones and help population. However, the network can suffer from blocks due to debris of collapsed or heavily damaged buildings. Understanding urban fabric modifications and classifying elements vulnerability are fundamental steps while dealing with risk-assessment and risk-reduction strategies. This article offers a first quick approach for assessing seismic vulnerability of paths network by considering interferences with building heritage damages. Quick data about existing urban fabric (e.g., buildings typology; streets and buildings geometries) are combined for developing new vulnerability indices for streets network. The earthquake macroseismic intensity is introduced for evaluating probable street blockages and summarizing the overall rating of risks in critical network locations, thus intensity that is not included in other current quick methods for streets-building interference is here taken into account. Risk-reduction strategies based on the proposed indices could minimize the interventions on architectural heritage, maximizing the safety of evacuees. These new indices could be combined with traditional assessment of buildings vulnerability, and evaluations on pedestrians’ and vehicles evacuation flows, for evaluating management strategies.     

Observatory validation of Neolithic tells (“Magoules”) in the Thessalian plain,central Greece,using hyperspectral spectroradiometric data

This paper presents the results obtained from field spectroradiometric campaigns over Neolithic tells (“magoules”) located at the Thessalian region in Greece. In each one of the four archaeological sites selected, three sections were carried out using the GER 1500 handheld spectroradiometer. Spectral profiles of the sections and several vegetation indices such as Normalized Difference Vegetation Indices (NDVI) and Simple Ratio (SR) have been examined in this study. This is one of the first times that ground hyperspectral data are evaluated in such context of archaeological research for the spectral characterization of archaeological features. As it was found, ground spectroradiometric measurements can be efficiently used in order to support and validate satellite imagery results for the detection of archaeological sites.     

Neolithic dogs: A reappraisal based on evidence from the remains of a large canid deposited in a ritual feature

A canid skull and mandible, dated to the late neolithic, produced a series of measurements which indicate an animal significantly larger than any dog recovered from this period. The skull showed evidence of healed trauma with associated asymmetry. Metrical and morphological criteria have been applied to identify the remains as those of wolf Canis lupus, and the results of these tests are inconclusive. The possibility that the remains are of a large dog, Canis familiaris, is discussed, together with the implications that this may have for the archaeological consideration of this species.     

Small prey hunting technology and zooarchaeological measures of taxonomic diversity and abundance: Ethnoarchaeological evidence from Central African forest foragers

Archaeological analyses of faunal assemblages often rely on rationale derived from the prey choice model to explain temporal and spatial changes in taxonomic measures of diversity and/or abundances. In this paper, we present analyses of ethnoarchaeological observations and bone assemblages created by Central African Bofi and Aka forest foragers which show that different small prey hunting technologies target specific suites of prey and that hunters vary their technological choice depending on their foraging goals. Analysis of ethnoarchaeological bone assemblages produced by the Bofi and Aka shows that variability in target prey can create spatially distinct, but contemporaneous, faunal assemblages with different diversity values and abundance indices. These data reveal important variation in how individuals within a contemporary human population rank prey and challenge current assumptions about the meaning of diversity and abundances measures in archaeological contexts. We argue that the use of diversity and abundance indices can obscure important intrasite variability in prehistoric foraging effort and suggest strategies that might enhance current techniques.