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In this article, we provide practical and straightforward guidance for the selection and sampling of shipwreck timbers for dendrochronological research. We outline sampling strategies and present informative figures that illustrate how to proceed in a variety of scenarios that archaeologists regularly encounter. However, in order to fully exploit the potential of tree‐ring research on these objects, we would urge archaeologists to involve dendrochronologists during the project planning phase to carefully plan and conduct adequate sampling of shipwreck assemblages.  相似文献   
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Jewish children who managed to survive Nazi attempts to exterminate them are a clear, yet still under-examined, example of a group who managed to resist the path to genocide. It was only by changing their individual social identity that they were able to survive. By more or less consciously breaking their ties with Judaism and converting to Catholicism, they abandoned membership of the group destined for extermination and strove to become unidentifiable as Jews. This article focuses on the issue of the identity of the Jewish children raised or born in Poland during the Nazi persecution and who survived the Shoah under an assumed non-Jewish identity. It will examine the war's impact on these Polish ‘hidden children’ and its consequences for their ethnic and religious identity. Many children were intentionally deprived of their Jewish identity by their parents or saviours since such a renunciation was the only way to survive. Therefore the role of non-Jewish rescuers and the attitude of the Jewish authorities towards these children's fate during and after the war is also discussed. The survival of these children hinged upon questions of identity and how successfully they were able to conceal their life-threatening origins and adopt the much safer disguise.  相似文献   
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Using the typology developed by Douglas Foyle, this article argues that John Howard behaved as a ‘pragmatist’ in dealing with situations where public opinion was relevant to Australia's engagement with Asia. Howard adhered to his own views on the relevant issues while attempting to lead public opinion in the direction he believed desirable. During the 1996–2007 period the most relevant issues relating to the impact of public opinion on Australia's Asian engagement were Australia's relations with Indonesia and Asian immigration. In the case of Australian–Indonesian relations the Howard government had to deal with various situations where an activated public opinion threatened to undermine the long term Australian approach that gave primacy to Indonesian concerns. Political leadership entailed developing a response that the government believed to be appropriate to Australia's long term objectives, while also attempting to persuade the public that this was the case. In the second instance policy developed in a more ‘deliberative’ context: Howard modified his earlier stance that was critical of Asian immigration, but continued to adhere to a strongly ‘integrationist’ position. This position was consistent with both his own views and his perception of public attitudes on the matter.  相似文献   
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A key feature of stone artefact morphology is the arrangement and patterning of negative flake scars left on flakes and cores. Scar patterning is often treated as a rough guide to identifying methods of core preparation and reduction and usually forms a key component of lithic typologies and other systems of analysis. However, scar patterns are often complex and difficult to capture using traditional measurement or classificatory techniques, particularly where flakes are thick and irregular, or where cores are flaked on many sides from a number of platforms. Three-dimensional analysis of flake scars is now more feasible using digital 3D surface scanning technologies, or using three-dimensional measurement tools such as the Microscribe-3DX which is now widely used in biological geometric morphometric studies more generally [D.C. Adams, F.J. Rohlf, D.E. Slice, Ital. J. Zool., 71 (2004) 5–16; F.J. Rohlf, L.F. Marcus, Trends Ecol. Evol. 8 (1993) 129–132. [1 and 34]]. This paper develops a mathematical formula for describing scar patterning using vectors calculated from the start and end points of flake scars recorded in three dimensions.  相似文献   
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This paper explores the geographic and environmental context of the Southern Dispersal Route, which has been proposed as a migratory route for Homo sapiens from East Africa to Australasia during oxygen isotope stage (OIS) 4 (71–59 kyr). A series of assumptions and constraints garnered from modern hunter-gatherer observations are used to build a model of coastal foragers, which is then integrated with high-resolution physiographic analyses to produce a potential dispersal route along the coastline of the Indian Ocean. Paleoenvironmental conditions that may have supplied critical resources or served as obstacles to human colonization are identified and discussed in regards to human subsistence, the speed of migration, and demographic expansion. These factors suggest that rapid dispersals along coastlines and river valleys would have occurred upon the initial expansion out of Africa, but slowed as populations expanded demographically into South Asia and the Sunda Shelf. This also suggests that archaeological signatures relating to the earliest modern Homo sapiens are more likely to be recovered in South Asia.  相似文献   
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