The technology and significance of the Acheulian giant cores of Gesher Benot Ya‘aqov,Israel

The presence of very large lithic artifacts at the Acheulian site of Gesher Benot Ya‘aqov is one of the site’s most distinctive and enlightening features. Basalt giant cores and their products, modified by a variety of core methods and found in association with different hominin activities, occur throughout the stratigraphic sequence of the site.     

空间信息技术在茶马古道遗产保护管理中的应用初探

空间信息技术近年来在文化遗产保护领域发挥了巨大的作用,在大遗址、运河遗产、长城资源等文化遗产调查、保护和管理中得到了广泛的应用.茶马古道作为特殊的线性文化遗产,所经之处受自然环境和地理条件的影响,对其保护和调查都存在很大的难度.而空间信息技术由于其全天时、全天候、覆盖范围广、信息化程度高、不需要人亲临现场的特点,在文化资源调查和管理中发挥巨大的作用,可以适应这一特殊要求.本文通过对茶马古道在保护和规划中对空间信息技术的需求进行了分析,探讨了空间信息技术在茶马古道文化遗产资源的调查、保护、规划及管理中的应用.     

Technology and the construction of oceanic space: Bathymetry and the Arctic continental shelf dispute

How did the Arctic seabed become a political space despite its almost complete inaccessibility to humans? While we can explain the causes of this in geopolitical and economic terms, theorizing the process is more difficult. This article argues that spatial constructions of the Arctic seabed emerge from the interaction among human actors, technologies, and the material environment. This interaction generates representations which are then fed into the overall process of spatializing the seabed. By highlighting the role of technology, this paper offers a way of relating human agency and materiality in the construction of oceanic space. The case study of bathymetry in the ongoing disputes over the Arctic continental shelf illustrates how technological and scientific advancements are embedded into global politics and themselves cause evolutions in the spatial construction of the seabed.     

Hindu cosmology and the orinetation and segregation of social groups in villages in Northwestern India

This paper presents a cultural analysis of the directional orientation and segregation of castes in villages in a part of the northwestern plains of India. It interprets the built environment in terms of Hindu cosmology. Recent literature in cultural geography interprets the landscape "as text" or through symbols. The symbolic approach has greater relevance for traditional societies where clear schemata are discernible in built environments. This paper attempts a critical appraisal of Hindu cosmology as a schema for interpreting built environments in Indian villages.
Challenging the widely held view that Indian villages lack order, the paper demonstrates that there is a religiously ordained order in the landscape. The order is manifested in the form of orientation of several features of landscape, especially the caste mohallãs (wards) to the cardinal directions. Orientation of caste mohallãs to the 'sacred' directions in a settlement follows a system evolved by Indian civilization to harmonize the fractured social order with the segmented cosmic order. The paper also demonstrates that segregation is an inherent characteristic of orientation.
As a background for regional diversities, empirical evidence reveals that in the study region Hindu cosmology is impressed on villages, though often in a modified form. Villagers believe that the social space known as khenúã slopes down from west to east, while the southern sector is the 'lowest' segment of the village. Dominant castes characteristically reserve for themselves the best western site of the village and low castes are placed in lower social spaces, with scheduled castes being generally placed in the south.     

Discrimination of Ceramic Types Using Digital Image Processing by Means of Morphological Filters

Digital processing of images can be used to analyse ceramic pastes, contributing in this way to the discrimination of ceramic types. The method involves several stages of analysis: digitization of images of ceramic pastes, pre‐processing of the images, particle segmentation, calculation, quantification and classification of the particle sizes. This procedure uses interactive algorithms of segmentation of images and grain size analysis derived from mathematical morphology theory. To prove the efficiency of the method, we processed digital images of polished thin sections of ceramic samples of Cypriot wares from the Late Bronze Age (1550–1450 bc ) and their Egyptian reproductions. Such groups have been previously analysed by optical microscopy, XRD, XRF, ICP–MS and EPMA. The results of the analysis were able to discriminate between these two different wares.     

The risk of harm to archaeological artefacts in soil from dynamic subsurface pressures generated by agricultural operations: experimental studies

An investigation was made of the fracture risk to buried ceramic pots and bones from the subsurface pressures generated by agricultural operations. A method for generating subsurface pressures at 0.25 m depth in a soil bin was developed and used to explore fracture failure of modern replicates of ceramic pots corresponding to different archaeological periods and aged medieval human bone. Application of conductive traces to the objects’ surfaces allowed detection of fracturing in real‐time without excavation. Predictive models relating fracture of objects to subsurface pressure application were developed by relating the probability of fracture to observed survival statistics at increasing subsurface pressures. Subsurface pressures of above 100 kPa were sufficient to fracture the more fragile pots at a probability level of 90%. The lowest subsurface pressure causing bone fracture was 280 kPa; however, no relationship was observed between subsurface pressure and bone fracture, probably due to variation in bone material. The subsurface pressures generated and applied are within the range reported from field measurements during typical agricultural operations. They indicate that measures to control the generation of subsurface pressures would be necessary to mitigate risk of harm from agriculture to buried archaeology; for example, via low‐pressure tyres, tracks and appropriate tillage.     

Evaluating the Relationship between Ceramic Wall Thickness and Heating Effectiveness,Fuel Efficiency,and Thermal Shock Resistance

ABSTRACT

In 1983, David Braun proposed that a shift from thicker- to thinner-walled cooking vessels in the midwestern United States was triggered by an increased dietary reliance on starchy grains (Braun 1983). Drawing on well-established principles of materials science (Van Vlack 1964), he suggested that, compared to thicker-walled vessels, thinner-walled ones would have been more thermally efficient and less likely to break from thermal shock. These attributes, he suggested, would have been advantageous for preparing seeds and grains that require lengthy cooking periods. Although consistent with materials science principles, Braun’s proposition has never been tested. In this paper, we present results of experiments undertaken to evaluate the relative cooking efficiency of thin- versus thick-walled vessels and consider the implications of these findings for understanding traditional ceramic technologies.     

Technology,chronology and the role of crucible steel as inferred from iron objects of the ancient site at Junnar,India

Ordinary iron objects from an ancient habitation site at Junnar in India, dating to the 2nd BC to AD 2nd century, were examined for their microstructure, chemical composition and age. The objects were mostly made of high carbon steel with a homogeneous microstructure consisting of fine spherical particles of carbide in the ferrite background, free of non-metallic inclusions. Their carbon concentration ranged from 0.7% to over 1.6% with one exception at 0.2%. Some of them contained trace amounts of silicon, manganese and sulfur while one object retained cavities due to volume contraction during solidification reactions. These features indicate that the objects examined constitute an early example of Indian steel making in crucibles. Evidence was found that basic techniques needed for the success of crucible steel technology were mostly available at Junnar at the time. The radiocarbon measurement on carbon samples extracted from one of the iron objects placed its date between 176 BC and AD 20, in agreement with the radiocarbon dates of three charcoal samples from the same site. The forgoing results support that crucible steel was produced in India at a much earlier date than previously supposed, to serve as a material for specific needs arising in daily life.     

Geochemical characterisation of north Asian glazed stonewares: a comparative analysis of NAA,ICP-OES and non-destructive pXRF

The analytical performance of non-destructive portable X-ray fluorescence (pXRF) is compared with that of Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) and Neutron Activation Analysis (NAA) for the elemental characterisation of a group of glazed stonewares from North-East Asia. As a non-destructive technique pXRF is potentially well suited to the elemental analysis of high value archaeological and museum collections but has yet to be critically evaluated for the analysis of archaeological stonewares. In this study we use multivariate evaluation to compare results from non-destructive pXRF in relation to ICP-OES and NAA analysis for the same group of samples. We conclude that, although pXRF is comparatively limited to a small number of major, minor and trace elements, these are sufficient to identify the same compositional groups as high dimensional ICP-OES and NAA datasets for this assemblage.     

A systematic approach to the recovery and identification of starches from carbonised deposits on ceramic vessels

Starch granules are being successfully recovered from an increasing range of artefacts. Here we present the recovery of starches from carbonised ceramic ‘foodcrusts’ from late Mesolithic–early Neolithic residues at the site of Neustadt in northern Germany. A method for investigating background loading of residues with contaminant starches is proposed by comparing interior ‘foodcrusts’ versus exterior ‘sooting’, for the purposes of eliminating samples with insignificant quantities of grains from subsequent identification procedures. The classification of starches to plant taxon is traditionally achieved by manual observations and measurement of nominal and ratio morphological variables. Here, we present a method for the automated classification of granules, using software developed in-house. The results show that when multiple granules are considered, the species selected as modern reference examples can be classified to high levels of specificity. When applied to the archaeological samples we show that wild plant resources persist in importance across the transition to agriculture, with high proportions of granule forms consistent with acorn (Quercus sp.) occurring in all samples. Hazelnut (Corylus avellana) types are less well-represented suggesting it was not an important food in the context of pottery, and may have been over-represented in the repertoire of hunter–gatherer resources. Cereals are not represented in any of the samples, supporting the notion that their adoption may have been a slow process, occurring more gradually than for other domesticated foods, or that they were not initially processed in ceramic vessels.