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In this paper, we propose a recursive approach to estimate the spatial error model. We compare the suggested methodology with standard estimation procedures and we report a set of Monte Carlo experiments which show that the recursive approach substantially reduces the computational effort affecting the precision of the estimators within reasonable limits. The proposed technique can prove helpful when applied to real-time streams of geographical data that are becoming increasingly available in the big data era. Finally, we illustrate this methodology using a set of earthquake data.  相似文献   
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Nationalism theorists have noted the link between traumatic events and national identity, and cultural trauma theory presents a framework for understanding how these events become trauma narratives. I argue for greater consideration of how these narratives are strategically linked to ideological frames of national identity. A case study of post‐Independence India considering the assassination of Mahatma Gandhi and the Partition of India and Pakistan demonstrates how two very different events were promoted as cultural traumas by various carrier groups in order to promote a secular vision of the Indian nation. Adapting Armstrong and Crage (2006), I suggest that the success of these trauma narratives depend on several criteria: the ease of narrating the event, how it is linked to underlying cultural meanings/frames and how the event interacts with historical contingencies.  相似文献   
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Past research has suggested that the humped conch (Strombus gibberulus), a species common in many prehistoric archaeological sites in the Pacific, declines in size and/or abundance over time. Explanations for this phenomenon largely revolve around the possibility that they were overharvested by human populations. In this study, we measured the length and width of over 1400 individual specimens of S. gibberulus shells recovered from the site of Chelechol ra Orrak in Palau, western Micronesia, in deposits dating from ca. 3000 BP to the present. Statistical analysis indicates that in contrast to previous reports, there is a significant size increase for this taxon through time which may be the result of a combination of anthropogenic and environmental factors. We discuss variables influencing mollusc size and suggest that, given the complexities of their interactions and the data limitations of archaeomalacological assemblages, unambiguous determination of the cause(s) of molluscan size change may not always be possible.  相似文献   
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ABSTRACT

Water resource management is a major challenge throughout the world. People still use traditional water harvesting and conservation techniques in many long-established societies. However, traditional methods are in decline or have been abandoned in many countries even though they are more efficient and cost effective than modern water harvesting techniques. Nevertheless, traditional approaches continue to be valuable in some countries, including Nepal. This research documents the state of such traditional methods, in this case stone spouts, in relation to their use and management within urban and peri-urban areas of Kathmandu Valley, Nepal. This study shows a somewhat surprising outcome that spout condition is better in unprotected areas than in protected areas.  相似文献   
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The Straits of Gibraltar have been historically an important maritime axis of connection between the Mediterranean and Atlantic areas of the Iberian Peninsula. For this reason, most of the archaeological research has focused on the coastal settlements, but its broader archaeological landscape remains mostly unknown. In this paper, we present recent intensive surveys in which a wide range of sites was detected, dating from the eighth century BC to the fourteenth AD. The ancient landscape is thus reconstructed over a long‐term perspective. Prior to the Roman expansion, the earlier Bailo‐La Silla del Papa was an urban central place that supported a dense network of subordinate settlements. Later on, the central settlement was transported from inland to the coastal town of Baelo Claudia, but the territorial structure remained based on a similar pattern.  相似文献   
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Summary.   This paper explores the formation of urban societies in the eastern Iberian Peninsula. From the Early Iberian Iron Age onwards it is possible to trace the emergence of a hierarchical settlement pattern in which larger settlements carried out the most important functions of control and exploitation of the resources in this territory, extending their authority over several small farming villages. This settlement pattern is associated with the complex socio-economic structures and political organization of Iberian aristocracies. In this paper we will focus on the development of the Iberians' active role in exchanging goods with oriental traders; it is this contact which subsequently produces social change in the Iron Age period.  相似文献   
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