Development of quartz cathodoluminescence for the geological grouping of archaeological ceramics: firing effects and data analysis

Cathodoluminescence (CL) spectrometry reveals genetic crystallographic and chemical characteristics of quartz grains specific to the thermodynamic conditions in which they crystallised and their mineralisation history. These genetic characteristics have been used successfully to determine the provenance of sediments. Geological sediments are the raw material for archaeological ceramics which means quartz CL has a potential application in ceramic provenance studies, particularly for fine wares and fabrics in which quartz is the only identifiable inclusion.     

History lessons for gender equality from the Zambian Copperbelt, 1900–1990

This article explores the historical causes and consequences of gender divisions of labour in the Zambian Copperbelt. Male breadwinner and female housewife stereotypes appear to have emerged as a product of imported Christian ideologies, colonial–capitalist concerns and an economic climate that largely enabled men to financially provide for their families. Reliant upon husbands for status and economic support, many urban women had little conjugal bargaining power. Gender divisions of labour also meant that people lacked first-hand evidence of women’s equal competence in employment and politics, who they thus often underrated and overlooked. Such perceptions seem to have perpetuated women’s exclusion from prestigious positions – a pattern sustained by macro-economic circumstances in the early decades of Independence. Compliance with the gender status inequalities promoted in pre-marital traditional initiation thus became necessary to marital and economic security, as well as respectability, which was not previously the case. While there were exceptions to these trends, the historical record illustrates the interplay between patterns of resource access, internalised gender stereotypes and cultural expectations.     

Bone density determination of moose skeletal remains from Isle Royale National Park using digital image enhancement and quantitative computed tomography (QCT)

As part of an investigation of prey vulnerability in Isle Royale National Park, MI, digital image processing techniques were used to enhance original quantitative computed tomography (QCT) film products to detail the processes of bone resorption and reformation in skeletal remains of moose (Alces alces). Integration of these two allied imaging technologies allowed analyses of pixels representing fractions of millimetres of bone. Using regression analysis, linear conversions from the pixel digital numbers (DN) to QCT Hounsfield units (HU) to actual bone mineral density (BMD) values were calculated (r²=0.99), and a scale of pixels per millimetre of bone was determined. The colour-enhanced image revealed quantifiable patterns of density, porosity and asymmetry. In addition, the procedure provided a quick but consistent methodology for evaluating numerous scans. Combining the limited use of a high-demand and expensive medical QCT scanner with a lower cost, readily available digital image processing and analysis system provides a technique for researchers to investigate the bone integrity of individual animals and populations. This method of evaluating bone density has implications for use in determining differential skeletal part-preservation in archaeofaunal studies. © 1997 John Wiley & Sons, Ltd.     

Consensus and the Fringe in American Archaeology

Is the “consensus of the scientific community” to reject transoceanic diffusion as an explanation for cultural change in the Americas justified by logic, data, or disciplinary politics?