排序方式: 共有54条查询结果,搜索用时 15 毫秒
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Shannon P. McPherron Sahra Talamo Paul Goldberg Laura Niven Dennis Sandgathe Michael P. Richards Daniel Richter Alain Turq Harold L. Dibble 《Journal of archaeological science》2012
This paper reports a series of radiocarbon dates on bone samples coming from the Mousterian of Acheulian Tradition (MTA) Layer 3 at the top of the Pech de l'Azé IV (Pech IV, France) Middle Palaeolithic sequence. All of these samples showed evidence of human impact, and they were prepared using current pre-treatment techniques to remove or identify contamination. The results indicate that the MTA at Pech IV started prior to the current limit of radiocarbon calibration (circa 50 ka BP) and ended by 45 ka cal. BP. These dates are supported by additional TL and ESR dates from the sequence, confirm previously suggested correlations between Pech I and IV, and generally fit within the known age range for the MTA. The oldest dates reported here may also lend support to still older TL dates for the MTA that taken together suggest that the MTA extended from late MIS 4 or early OIS 3 through to the end of the Middle Palaeolithic in southwest France. 相似文献
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Shannon O'Lear 《Eurasian Geography and Economics》2013,54(4):305-312
This paper examines the relationship between size of land holding and family income, based on a recent survey of rural households in Poland. In general, the results indicate a positive relationship between income and size of land holdings, suggesting that successful Polish farmers are expanding their farm holdings through land market transactions. Constraints to efficient functioning of these land markets in Poland are investigated as well, which include high government-determined land transaction costs, complex registration procedures, poor access to mortgage facilities, and a bias against larger farms built into the unemployment benefits system. Journal of Economic Literature, Classification Numbers: O18, Q15, Q24. 5 figures, 12 tables, 10 references. 相似文献
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Mark Aschheim Shannon Flanagan John Harlander Chris Pitt Alba Alfaro Carlos Rivas 《Journal of Earthquake Engineering》2013,17(6):829-846
The seismic vulnerability of housing stock in El Salvador was demonstrated during the recent 2001 earthquakes. Relative to other types of common residential construction, confined masonry dwellings performed well. A coordinated pilot study was conducted with the objective of improving the seismic resistance of this form of construction while reducing associated costs and greenhouse gas emissions. Laboratory tests examined brick strength in relation to firing temperature and duration. Analytical studies examined the potential for voided bricks to improve seismic performance, the reduction in demands associated with stiffening the roof diaphragm, and demands imposed on the roof bracing system. This pilot study identifies the potential for voided bricks to reduce construction costs and greenhouse gas emissions with negligible effects on performance. The addition of end-bay diagonal bracing at the roof level resulted in significant performance enhancements. 相似文献
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The Necessity of Dialectical Naturalism: Marcuse,Bookchin, and Dialectics in the Midst of Ecological Crises 下载免费PDF全文
In the wake of ecological crises, there has been a resurgence of interest in the relation between dialectical thought and nature. The work of Herbert Marcuse and Murray Bookchin offers unique approaches to this question that remain highly relevant. In the first half of the article, we engage with Marcuse's application of the dialectical method in which he gestured to the “vital need” to push beyond the appearance of “the real” and yet lamented the loss of the ability for negative thinking to pierce the dominance of the “technical apparatus” that tied humanity to this “radical falsity”. Here, we suggest the need for a more holistic dialectical understanding of the social totality—one that is directly located within, and takes as foundational, the environmental conditions of human society. In the second half, we examine Murray Bookchin's conception of “dialectical naturalism” as a more thorough engagement with the human/nature relation that surpasses Marcuse's late engagements with ecologism. In particular, we offer critical reflections on the concept of “nature” in the contemporary ecology movement and illustrate how dialectical naturalism is capable of not only transcending dualistic conceptions of “man/nature” but in expanding our awareness of the potentialities of history along what Bookchin terms the “libertory pathways” to a restorative relation between human “second nature” and biological “first nature”. We posit that systemic, interconnected and accelerating ecological crises (climatic, biospheric and oceanic) form the objective and absolute contradiction of contemporary global social life that compels an awareness of the potentialities of an ecological society. Only through this awareness can we break through the reified “solutions” that have often plagued the ecology movement, bringing about the urgent social and ecological transformation that our species requires for its liberation and long‐term survival. 相似文献
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Harold L. Dibble Simon J. Holdaway Sam C. Lin David R. Braun Matthew J. Douglass Radu Iovita Shannon P. McPherron Deborah I. Olszewski Dennis Sandgathe 《Journal of Archaeological Method and Theory》2017,24(3):813-851
While lithic objects can potentially inform us about past adaptations and behaviors, it is important to develop a comprehensive understanding of all of the various processes that influence what we recover from the archaeological record. We argue here that many assumptions used by archaeologists to derive behavioral inferences through the definition, conceptualization, and interpretation of both individual stone artifact forms and groups of artifacts identified as assemblages do not fit squarely with what we have learned from both ethnographic sources and analyses of archaeological materials. We discuss this in terms of two fallacies. The first is the fallacy of the “desired end product” in stone artifact manufacture, which also includes our ability to recognize such end products. The second fallacy has to do with the notions that lithic assemblages represent simple accumulations of contemporary behaviors and the degree to which the composition of the depositional units we study reliably match the kinds of activities that took place. Although it is beyond the scope of this paper to offer a comprehensive set of new methodologies and theoretical perspectives to solve these problems, our goal here is to stress the importance of rethinking some of our most basic assumptions regarding the nature of lithic objects and how they become part of the archaeological record. Such a revision is needed if we want to be able to develop research questions that can be addressed with the data we have available to us. 相似文献
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