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Charlotte Horlyck 《International Journal of Nautical Archaeology》2013,42(2):454-456
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Early Paleoindians often are described as highly mobile hunter–gatherers who employed lithic technologies designed to minimize stone transport costs. We experimentally reduced blade and bifacial cores and found both reduction strategies to be equally efficient for the production of useable flake blanks. Further, when compared to similar core reduction experiments, the results of this study showed no significant differences in core efficiency between bifacial, prismatic blade, and wedge-shaped blade core reduction. Biface and blade cores with initial weights greater than 1000 g produced useable flakes as efficiently as informal cores. However, bifacial and blade core efficiency decreased with initial core weight. When considered in terms of Early Paleoindian technological organization, differences in core efficiencies suggest that Folsom groups employed core reduction strategies designed to minimize stone transport costs, but Clovis groups did not. 相似文献
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Charlotte Livingstone 《Anthropology today》2014,30(4):19-23
Rio de Janeiro city's policy of Pacifying Police Units (UPP) for strategically located favelas is part of the state's reconfiguration of the city, involving military occupations, evictions and gentrification in the lead‐up to the 2014 World Cup and 2016 Olympics. Yet since the author arrived in Rio to carry out doctoral research on young people's experiences with the UPP, the flaws in the project have become increasingly exposed as the policy appears to be experiencing a crisis. This paper describes this current crisis in the global context of mega‐events and the elitization of urban space. 相似文献
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Johs G. Andersen Keith Manchester Charlotte Roberts 《International Journal of Osteoarchaeology》1994,4(1):21-30
Infective lesions of bone in leprosy are of two types. In the rhinomaxillary syndrome, superficial infective changes in the bones of the maxilla are due to the presence of Mycobacterium leprae. Lytic foci in the medulla or the outer cortical surface may be due to Mycobacterium leprae at the site as granulomatous lesions. The most frequent infective bone changes in leprosy are, however, sequelae of regional anaesthesia and soft tissue ulceration. The bone lesions are due to pyogenic bacteria and the nature of these infective lesions is similar to that in non-leprous conditions. The pyogenic lesions in leprosy are restricted to the bones of the hands, feet and lower legs. 相似文献
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Gwen Dalby Keith Manchester Charlotte A. Roberts 《International Journal of Osteoarchaeology》1993,3(3):207-212
A total of 1164 temporal bones from various cemetery sites in England were examined using a fibre optic endoscope. Eight bones were found to have evidence of otosclerosis in which proliferative new bone fixes the footplate of the stapes into the oval window, causing deafness. A prevalence of 0.9 per cent in this study is comparable with the incidence found in modern white populations and with that found in a study of 2760 Lithuanian temporal bones of various periods. 相似文献