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S. Mays K. Robson‐Brown S. Vincent J. Eyers H. King A. Roberts 《International Journal of Osteoarchaeology》2014,24(1):111-115
A perinatal infant skeleton from the first–fourth century AD Roman villa site at Hambleden, England, shows what appear to be cut marks on the proximal part of the right femur. Gross, microscopic and micro‐computed tomography evaluations suggest that they occurred perimortem and were probably caused by a non‐serrated blade. The reason for the cuts is uncertain, but their location is consistent with the practice of embryotomy, as described in classical sources for obstructed labour due to a dead or dying foetus in a breech or leg presentation. If this interpretation is correct, this case represents a rare example of embryotomy in the palaeopathological record. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
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Matthew L. Chastain Alix C. Deymier-Black John E. Kelly James A. Brown David C. Dunand 《Journal of archaeological science》2011
Copper artifacts from Cahokia Mounds, Illinois were analyzed from a materials science perspective to shed light on techniques used by Mississippian copper workers to deform nuggets of native copper into thin sheets. Eight small copper pieces from a copper-working site at Cahokia’s Mound 34 were subjected to metallographic examination. Replication experiments thereafter recreated features of the artifacts under controlled conditions. It is concluded that copper sheets were thinned through repeated cycles of hammering and annealing performed at temperatures achievable in an open wood fire. The welding of sheets to create multilayered objects was not observed in any artifacts and could not be accomplished experimentally. Additionally, a possible cutting method used on some artifacts was identified. 相似文献
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Counties identified as anomalous in the 2004 US presidential election - large metropolitan counties and majority-minority counties that voted Republican and non and small-metropolitan counties that voted Democratic, are the subject of a qualitative analysis to assess why they were exceptions to the conventional wisdom of a Red and Blue America polarized along metropolitan-non-metropolitan and modern versus traditional dimensions. Contacts with professional colleagues, and with media and partisan representatives, and visits to selected counties provided valuable insights and helped us to assess the extent to which the county votes in 2008 reinforced or changed the broad Red and Blue dimensions derived from 2000 to 2004. 相似文献
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Signing the North American Free Trade Agreement (NAFTA) liberalized trade policy and reduced tariffs between Mexico, the United States, and Canada, but activists opposed to the treaty predicted an environmental disaster. This article seeks to analyze the dynamics of environmental spending and changes in companies' profiles following NAFTA. Our results suggest that these predictions have not come true. Through an econometric model, we explore how 2,438 industries in the 1994–2002 period made environmental decisions and how much they spent on cleanup. Estimates were made with a dynamic panel model using the generalized method of moments (GMM) method. Our results suggest that environmental investment decisions depended on business size, their technological capabilities, sales performance, and the need to comply with the standards required by customers in the international market. The last section explores policies to improve compliance with Mexico's environmental regulations and to develop sustainable, eco‐friendly manufacturing. 相似文献
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Australian Foreign Minister Julie Bishop and former Prime Minister Tony Abbott's Chief of Staff Peta Credlin have experienced very different political fortunes. Once the two most powerful women in the Australian Liberal Party, Credlin's political demise was mired in controversy, while Bishop continues to enjoy the support of her Party and the public. While there are many reasons for this, the article focuses on the gendered politics surrounding their experiences. Based on analysis of the media representations of Bishop and Credlin between 2011 and 2015, we argue that Bishop successfully negotiates gender politics by deploying the Iron Butterfly model of conservative femininity, while Credlin's fierce Political Warrior persona saw her pilloried. 相似文献
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EXTENDING A SMOOTH PARAMETER MODEL TO FIRM LOCATION ANALYSES: THE CASE OF NATURAL GAS ESTABLISHMENTS IN THE UNITED STATES
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This paper extends recent developments in regional growth modeling that use spatial regime switching functions to a count regression model of firm location events. The smooth parameter count model (SPCM) allows for a parsimonious parameterization of locally varying coefficients while simultaneously attending to excess‐zero count events. An empirical application examines natural gas establishment growth between 2005 and 2010. The smooth parameter model appears to outperform a standard zero‐inflated count model. The SPCM may be extended to the location analysis of other industries with the identification of transition variables related to the supply or demand oriented cost structure of the sector. 相似文献