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A largely accepted paradigm in African recent prehistory considers pastoralism to be the main subsistence source of food-producing communities along the Sudanese Nile valley from the 6th millennium cal BC onwards. This paradigm is constraining the development of a wider theoretical perspective that assumes, instead, a regionally differentiated picture of the economic and social organisation of local communities in northeastern Africa. This paradigm is thus the strongest impediment to achieving reliable and convincing syntheses of the transition from food collection to food production in this area. New data from Upper Nubia and central Sudan open the way for different and more complex scenarios and a new understanding of the local transition from agro-pastoral to agricultural practices. A more systematic data-based approach helps to change radically our perception of different Neolithic trajectories. Moreover, it helps to place in a different perspective—based on various levels of identity formation processes—change and continuity along the chrono-cultural sequence, as well as the different meanings that each local group confers on apparently similar acts in the context of the funerary ideology.

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In the great civilisations of the past, shapeshifting promised a restoration of order in turbulent times in return for the deference of loyal subjects. It was a strategy of the powerful to maintain advantage and could also be used to bind opponents to an undesired form. This study finds its resonance in the contemporary shapeshifting that is the supposed transition from the fossil fuel economy. With reference to the fusion of oil, grain and sugar companies in Brazil's ethanol sector, it explores how amidst economic, environmental and political insecurity these “old villains” of the carbon economy have fused and emerged as the “new heroes” of the green economy. Accounts of dissenting rural subjects, however, unveil the mythical nature of avowed social gains from this shapeshifting. Amidst rural conflict and a successive weakening of regulation, it becomes evident how their petrification, in a metaphorical and increasingly literal sense is required.  相似文献   
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The Mesolithic period represents a key stage in the human history of Sudan, but its complexity is not yet fully understood. Since the beginning of prehistoric research in this region, efforts were made to understand Mesolithic site formation processes and post-depositional disturbances. Responsibility for the destruction of most Mesolithic sites’ deposits rests mainly on later use of the ancient mound-like settlements as burial places by Meroitic and post-Meroitic people. Excavations at several sites in the El Salha and Al Khiday areas (White Nile, south of Omdurman) have provided recent progress in our knowledge of Mesolithic living structures in their palaeoenvironmental contexts. Detailed stratigraphic and geoarchaeological investigations enabled us to distinguish, within the sequences identified at excavated mounds, the existence of basal archaeological strata still in situ that had remained unaffected by subsequent anthropogenic disturbances and to understand the functional aspects of several archaeological features associated with Mesolithic living floors. This offers the opportunity to reassess the Mesolithic cultural sequence in the region and reconsider some statements on the economic and social aspects of Mesolithic life and landscape exploitation strategies.  相似文献   
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This work explores the compositional variation of stone tool assemblages on the coast of continental Patagonia, Argentina, on a latitudinal scale. By means of statistical procedures, we evaluate the role of the environment and geography in changes in relative diversity of different tool classes. Results suggest that both environment and geography account for a statistically significant part of the variation. The observed pattern suggests a latitudinal gradient in diversity that might be explained as the result of the historical process of human peopling of Patagonia as well as of selective mechanisms related to energy acquisition.  相似文献   
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Prey remains recovered from puma (Puma concolor) scat were analyzed in order to identify taphonomic features produced on them by this predator. Mammal remains are abundant in puma scat, but recognition of bone remains decreases as prey size increases. Modifications produced by digestion are strong. However, micromammal bones show a gradation in preservation that includes well preserved specimens. Data presented here and their interpretation may possibly be extrapolated to zooarchaeological or paleontological assemblage.  相似文献   
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This paper explores a possible direction for enabling trans-national cooperation in Europe through forms of spatial planning harmonisation. The specific case considered is that of the trans-national border area located in the wider Alpine-Adriatic context, comprising Carinthia (Austria), Friuli Venezia Giulia (Italy) and Slovenia. Starting from a general analysis of spatial planning systems and identification of operational difficulties which may emerge within any one Member State's planning system—and which then may be compounded in a trans-national context—the paper considers the establishment of a “shared knowledge base” as well as a “shared vision” between the Member States as preconditions to fostering trans-national cooperation.  相似文献   
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