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Determining hand laterality during human evolution is important in order to identify brain hemispheric lateralization for motor tasks and, indirectly, to gain information on the complex cognitive functions of the human brain. In this paper, we present a new method for inferring handedness from lithic evidence. The study is based on an analysis of the scatter patterns of lithic remains from stone-knapping episodes. An experimental programme was carried out by 14 knappers (eight right-handed and six left-handed), ranging from individuals that had never even struck two pebbles together to individuals who were quite familiar with prehistoric tools and had some degree of practice. The results of the experiment show that the material scatter patterns of right- and left-handed knappers at group level are different, but they do overlap at certain intervals. At the individual level, the probability of falsely ascribing left- and right-handedness has also been estimated. In addition, we have adapted this method to be applied to the archaeological record. In this case, only well-preserved knapping events with no post-depositional alterations can be used to assign left- or right-handed knappers, with the former being more reliably detected than the latter.  相似文献   
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This paper demonstrates the positive effect of immigrant entrepreneurs on manufacturing exports over and above that of diasporas. Using small-scale regional administrative data, our instrumental variable estimates of export gravity models imply that ceteris paribus, that is, holding constant the total number of immigrants, the expected protrade effect of a migrant becoming an entrepreneur amounts to an average increase of US$5,946 in the export flows toward her country of origin. Besides these dyadic effects, immigrant entrepreneurs unlike nonentrepreneurial immigrants raise a region's overall competitiveness and export flows toward other destinations as well.  相似文献   
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The Renaissance saw the first systematic anatomical and physiological studies of the brain and human body because scientists, for the first time in centuries, were allowed to dissect human bodies for study. Renaissance artists were frequently found at dissections and their attention to detail can be observed in their products. Scientists themselves were increasingly artistic, and they created astonishing anatomical models and illustrations that can still be studied. The cross-fertilization of art and science in the Renaissance resulted in more scientific analyses of neuroanatomy as well as more creative ways in which such analyses could be depicted. Both art and science benefited from the reciprocal ways in which the two influenced each other even as they provided new ways of explaining the mysteries of the human body and mind.  相似文献   
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This article aims to correlate the political rather than the pastoral action of Cardinal Camillo Ruini with the rise and consolidation of the politician Silvio Berlusconi from 1994 to 2007, set in the context of the major changes that occurred in the Catholic Church and in Italian republican politics during the 1980s and 1990s. The main theme is an ‘instrumental interaction’ between the two systems, Ruinismo and Berlusconismo, which only coincided at the level of political opportunity and gave rise to important synergies between two men who otherwise had nothing in common.  相似文献   
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This contribution looks at land property relations in a peasant community in the central highlands of Peru. Rather than using a rights‐based approach, the authors propose a ‘practice force field approach’ for their analysis of property relations under communal land tenure regimes. Their study combines qualitative ethnographic case studies with quantitative analysis of data on land distribution. In contrast to rights‐based approaches, this perspective understands the legal discourses that people draw upon to explain property relations as ‘justifying rule talk’ rather than the reflection of a system of property rights. It is shown how property relations are shaped in mediated interactive processes, where official rules, moral principles, shared histories and strategic games come together. The authors use this practice force field approach to study Usibamba, an Andean community that has developed a true disciplinary regime of communal governance based on control over land. The role of ‘rule talk’ and the function of elaborate local systems of land registration are examined in the context of the annual reallocation of communal land. Particular attention is paid to the performance of the president of the comunidad during this delicate process and his reflections on the course of events.  相似文献   
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This paper explores the industrial affiliation and linkages of research and technology organizations (RTOs) in nine North Italian regions highly specialized in advanced manufacturing and introduces a methodology to assess the potential for a cross-regional technology platform. RTOs are supposed to operate in the development and application phases of innovation and are expected to provide access to key enabling technologies and R&D infrastructures. An original survey panel of 55 Italian RTOs is used and Social network analysis is introduced to assess the potential of RTOs to operate as a single cross-regional platform across key industrial and technology domains. Centrality measures are used to build an empirical model on the factors that drive the higher centrality of RTOs. Centrality is increased by convergence on few key technology priorities and is positively correlated with collaborative ventures, the number of contracts with firms and the presence of distinctive R&D infrastructures. Such a platform rests on specialized regional hubs, it operates with no gatekeepers and it only partially exploits geographical and technological proximity within the network. Future research avenues are discussed to improve the function of technology diffusion of RTOs in a cross-regional perspective.  相似文献   
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This study undertook a quantitative analysis of town master plans to define future urban growth. Spatial direction and intensity of urban expansion were analysed in relation to local contexts using land zoning and a comprehensive database of socio-economic indicators at the municipal scale in Catalonia, Spain. Our results illustrate a progressive shift towards discontinuous settlements consolidating urban centres in most accessible rural areas. Contrary to what was hypothesized (and partly observed) in recent decades, settlement expansion will modestly contribute to a balanced urban spatial structure. Future urban development in Catalonia will not follow a polycentric model, fuelling instead the growth of medium and small urban centres. This process may consolidate the incipient divide in rural areas with high accessibility and a dynamic economic base with remote inland areas experiencing land abandonment and depopulation. The use of indicators derived from town master plans in the assessment of (scattered or polycentric) future urbanization in Europe is finally discussed.  相似文献   
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