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1.
The interpretation that a rock has been subjected to cultural utilization is a basic element of hunter-gatherer research. The fracture mechanics of the flaked stone tool production process are well understood and the material residues are routinely identified during fieldwork. Conversely, non-percussion processes such as hot-rock technology, which can result in rock fracture, are less well understood. An experimental study has been developed to examine the fractured gravels observed at a prehistoric site on the Southern Plains (USA). The experiment has sought to determine whether cultural or natural agencies were responsible for the production of the angularly fractured rocks. The positive results of the experiment indicate that not only were humans most likely responsible for the breakages, but also that the fractured rocks often exhibit distinctive morphologies that may be identified during fieldwork. This simple experimental methodology is applicable to other hunter-gatherer sites where the depositional environment is not conducive to the structural preservation of features such as hearths.  相似文献   
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Both education and parenting became increasingly ‘child-centred’, or ‘progressive’, in post-war England. This article contends that the impact of this shift for concepts of childhood, and for children themselves, was equivocal. Progressive methods were physically and emotionally demanding for both teachers and parents, and popularised versions of developmental psychology and psychoanalysis shaped a limiting concept of the child. This article also suggests, in line with recent work by Thomson and Shapira, that changing concepts of childhood map democratic selfhood because the capabilities that children lacked were those that must be possessed by the adult citizen. By exploring how children were defined in relation to adults, and how adults’ needs were increasingly subordinated to those of the child, this article also begins to question how we might usefully use age as a ‘category of historical analysis’.  相似文献   
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Western preconceptions regarding African sexuality distorted early research on the social context of AIDS in Africa and limited the scope of preventive policies. Key works cited repeatedly in the social science and policy literature constructed a hypersexualized pan–African culture as the main reason for the high prevalence of HIV in sub–Saharan Africa. Africans were portrayed as the social ‘Other’ in works marked by sweeping generalizations and innuendo, rather than useful comparative data on sexual behaviour. Although biomedical studies demonstrate the role of numerous factors that influence HIV transmission among poor people, a narrowly behavioural explanation dominated the AIDS–in–Africa discourse for over a decade and still circumscribes preventive strategies in Africa and elsewhere.  相似文献   
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Multiple osteochondromas is an inherited autosomal dominant condition of enchondral bone growth. The paper undertakes the first synthesis study of the 16 known cases of the condition that have been identified in the international palaeopathological record. It also includes information derived from two newly discovered cases of the disease in two adult male individuals recovered from the Medieval cemetery at Ballyhanna, Co. Donegal, Ireland. The formation of multiple osteochondromas is the best known characteristic of the disease but it also involves the development of a suite of orthopaedic deformities. These deformities, which include disproportionate short stature, inequality of bone length, forearm deformities, tibiofibular diastasis, coxa valga of the hip and valgus deformity of the knee and ankle, are discussed in relation to the archaeological cases. Numerous synonyms for the disease have been used within the various publications produced by palaeopathologists, and this can generate confusion among readers. As such, the paper recommends that in future palaeopathologists should follow the guidance of the World Health Organization and use the term multiple osteochondromas when discussing the disease.  相似文献   
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The incorporation of plant biomass into soil usually leads to long-chain n-alkanes with a relative predominance of odd carbon numbered homologues. Contrastingly, an increase in short-chain even carbon numbered n-alkanes was found in charred biomass with progressing temperatures. We applied lipid analysis to buried ancient topsoils that contained charred organic matter and to corresponding control soils, which were characterized by a lighter color and lower contents of charred materials. Commonly, the proportion of lipid extracts was found to be lower in the ancient soil than in the control samples, which indicated an enhanced degradation of organic matter, e.g., by thermal degradation. All samples displayed a particular pattern of short-chain and even carbon numbered n-alkanes (maximum at n-C16 or n-C18). The ratios CPI (carbon preference index) and ACL (average chain length) for the investigated soil samples matched the ratios found for maize and rye straw charred at 400 °C or 500 °C, respectively. These molecular ratios indicate the presence of charred biomass. The predominance of short-chain and even carbon numbered n-alkanes was a result of thermal degradation of biomass. The degradation products were preserved in ancient soils and could be applied as molecular markers in archaeological or palaeoenvironmental research.  相似文献   
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Cilliní—or children’s burial grounds—were the designated resting places for unbaptized infants and other members of Irish society who were considered unsuitable by the Roman Catholic Church for burial in consecrated ground. The sites appear to have proliferated from the seventeenth century onwards in the wake of the Counter-Reformation. While a number of previous studies have attempted to relate their apparently marginal characteristics to the liminality of Limbo, evidence drawn from the archaeological record and oral history accounts suggests that it was only the Roman Catholic Church that considered cilliní, and those interred within, to be marginal. In contrast, the evidence suggests that the families of the dead regarded the cemeteries as important places of burial and treated them in a similar manner to consecrated burial grounds.  相似文献   
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Richard Kirkendall's collection of essays, The Organization of American Historians and the Writing and Teaching of American History, examines the history of the Organization of American Historians (OAH) from its founding to the present, using that history to illuminate how the writing of American history has changed over the last hundred years. The book provides coverage of all the major dimensions of the Mississippi Valley Historical Association's (MVHA) and the OAH's activities, ranging from the work of its scholarly publications, the Mississippi Historical Valley Review and the Journal of American History, to its role in promoting the teaching of American history. Overall, the essays in the volume tell a story of the organization's progress toward greater inclusion and democracy, falling prey to a Whig interpretation of historiography. In doing so, the book is part of a larger tendency in the way that historians have approached historiography, which in turn reflects their ambivalence about their relationship to the historical process. Thus, even as the very enterprise of historiography is premised on the recognition of how historians are themselves the products of the historical process, historians have revealed the limits to that recognition in their approach to the subject. This essay shows how deeply rooted this duality has been in the study of American historiography and illuminates some of its sources by placing Kirkendall's book in the context of how the MVHA and the OAH have treated historiography over the course of the organization's history.  相似文献   
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