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Continuing field work on Cranborne Chase has examined a unique shaft in Fir Tree Field, Down Farm in the parish of Gussage St Michael. Although shafts are known in prehistoric contexts elsewhere in England in the form of Neolithic flint mines, ritual shafts and even Bronze Age wells (Wilsford), the shaft reported here is particularly early and remains, at present, unexplained. Excavation and augering has revealed a shaft over 25 m deep containing evidence of Mesolithic to Beaker activity. 相似文献
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This study examines vault thickness in two Pleistocene crania at the centre of discussions about the evolution of Indigenous Australians and competing scenarios about modern human origins: Willandra Lakes Human (WLH) 3 and WLH 50. We estimated total vault thickness and thickness of the diploë, external and internal table on CT-scans, and undertook a quantitative comparison of them. We found that they differ significantly in absolute thickness, but are similar in terms of the relative contribution to thickness made by the diploic space and total table. They also differ significantly in terms of relative variation in thickness, and in several instances, WLH 50 shows greater variability than WLH 3. This finding undermines pathology as an explanation for thickness in the former cranium. Among later hominins, WLH 50 is highly unusual in possessing an extremely thick vault at bregma. We show, however, that vault thickness at this landmark is positively allometrically scaled in Indigenous Australians, but negatively scaled in Ngandong Homo erectus. Thus, vault thickness is mostly explained by the extremely large size of WLH 50: one of the largest hominin crania ever found. Moreover, its extreme thickness firmly establishes its affinities with modern humans rather than the Ngandong group. Despite the important role played by epigenesis in the development of the cranial vault, similarities between WLH 3 and WLH 50 indicate some canalisation in the extent to which the various vault components contribute to total thickness. 相似文献
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W. Nathan Green 《Development and change》2020,51(6):1429-1453
Cambodian microfinance borrowers are suffering from an over-indebtedness crisis. In the past 20 years, the Cambodian government has implemented financial reforms that have commercialized the microfinance sector and promoted industry self-regulation. Echoing long-standing concerns about neoliberal microfinance, critics maintain that these reforms have hollowed out the Cambodian state's ability to regulate a highly competitive market, thereby exacerbating the problem of over-indebtedness. In contrast, based upon 20 months of ethnographic research in southern Cambodia by the author, this article argues that the microfinance market would not function without local authorities performing key regulatory roles of the state. These local authorities include commune councillors — elected representatives of multiple villages — who work closely with village leaders and local police. They are the primary state actors who enforce the property rights and loan contracts upon which Cambodia's microfinance market depends. The author analyses how this local state regulation contributes to household indebtedness by encouraging multiple borrowing, rural out-migration and land repossession. The article advances development studies scholarship on over-indebtedness by demonstrating that the inequitable outcomes of neoliberal microfinance can be better understood, and contested, by interrogating the multi-scalar spaces of state regulatory power. 相似文献
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Cristina Gómez Michael A. Wulder Alastair G. Dawson William Ritchie David R. Green 《Scottish Geographical Journal》2013,129(4):279-299
AbstractObservation of cause–effect patterns of change in coastal environments provides insights into vulnerable areas and supports prediction and adaptation to flooding and erosion. Historic and periodic (6–8 year intervals) imagery from the Landsat archive is used to investigate transformations in the Atlantic coast of two Scottish islands over the period 1989–2011. Supervised classification of spectrally normalized images followed by change detection and spatial analysis reveals the patterns of change and the location of the most dynamic coastal areas. Quantitative measures of recent shifts and movement rates of relevant coastal lines, such as the lower limit of land-based vegetation, are assessed with the Digital Shoreline Analysis System. While very low rates are indicated for horizontal changes in the position of the lower limit of land-based vegetation (0.3?m?y?1), specific areas have been subjected to high rates of coastal progradation as well as erosion (e.g. 2.5?m?y?1 at Stilligarry). Information derived from satellite data supports the characterization of geomorphologically dynamic coasts at regional scales. With a rich and open access archive of imagery, a commitment to continuity, and compatibility with the Earth observation missions of other space programs, the Landsat mission offers useful and otherwise unavailable data for monitoring of coastal areas. 相似文献
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