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11.
This paper reviews the results of a long-term research project that used stable isotope analyses (δ13C, δ15N, δ34S) and Bayesian mixing models to better model the chronology for a presumed Viking Age cemetery at Hofstaðir, near Lake Mývatn in north-east Iceland. δ13C and radiocarbon dating indicated that many of the individuals consumed a large amount of marine protein, which results in a marine reservoir effect (MRE), making ages older than expected. In addition to the MRE, geological activity in the region has the potential to introduce massive quantities of radioactive ‘dead’ carbon into the freshwater system, resulting in a very large freshwater reservoir effect (FRE) that can offset radiocarbon ages on the order of a few thousand years. The radiocarbon dates of organisms that derive an unknown proportion of their carbon from both marine and freshwater reservoirs are extremely difficult to ‘correct’, or, more appropriately, model. The research not only highlights the complexities of dealing with multiple reservoirs, but also how important it is to develop models that are temporally and geographically relevant to the site under study. Finally, it shows how this data can be used to inform the development of chronological models for refining the dating for archaeological activity.  相似文献   
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Julie Gamble 《对极》2019,51(4):1166-1184
This article discusses transit infrastructure as a site of radical possibility and limitation in an age of participatory democracy across Latin America. I focus on multiple spaces of participation in Quito, Ecuador to elucidate how citizenship and infrastructure are co‐produced through gendered processes. I first analyse city space of Quito from a gendered and infrastructural lens to consider how urban environments are dictated by violence and insecurity. Then, against this backdrop, I explore the spatial strategies of the feminist bicycle collective, Carishina en Bici, which translates from Quechua to “bad housewives that cycle”. Here, I draw on the concept of “deep play” to reveal how public practices in Quito question the equitable impacts of local democratic experimentation. To examine Carishinas’ spatial practices, I focus on an urban alleycat race, the Carishina Race, to show how strategic practices of solidarity reinsert feminist possibilities in urban space.  相似文献   
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Along with a teaching collection, the Faculty of Medicine at the University of Western Ontario, London, Canada, began accepting medical artifacts for a historical museum in the early 1920s, although it never developed into more than an unofficial collection until the 1970s, when it was transformed into the Medical Museum and Archives at the University Hospital. In the 1990s, the artifacts were dispersed among several local institutions. The remaining objects at the university have been now reorganized as the Medical Artifact Collection. While these objects were once used to educate students about the practice and philosophy of medicine, they are now used to teach students about local, medical, Canadian and public history.  相似文献   
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This quantitative analysis examines evidence for the impacts of mothers’ death on the schooling of their left-behind children (ages 6–17 years) in the Matlab Health and Demographic Surveillance System (HDSS) area of the International Centre for Diarrhoeal Disease Research, Bangladesh. The analysis compared the completed levels of primary and junior secondary schooling in 2005 (respectively Class 1 among ages 6–17, Class 5 among ages 12–17 and Class 7 among ages 15–17) of children whose mothers had died during 1982–2005 (from maternal and/or nonmaternal causes, and any cause) with the completed schooling of children of surviving mothers in 2005. The results, after controlling for selected socioeconomic variables, indicate that children whose mothers had died had lower completion of schooling levels, and that those children from poorer households fared worst.  相似文献   
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To obtain accurate results in the RHX dating of ceramics, it is essential that the RHX measurements are continued until the rate of mass gain is constant with (time)1/4. In this paper, we discuss how the initial stages of mass gain are affected by the specific surface area (SSA) of the ceramic material. The paper provides guidance on experimental protocols to avoid dating results being distorted by relatively early‐time mass gain data.  相似文献   
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Julie Cupples  Kevin Glynn 《对极》2014,46(2):359-381
Hurricanes Katrina and Felix made landfall in 2005 and 2007 on the Gulf Coast of the US and the Atlantic Coast of Nicaragua respectively. Despite many economic, political and cultural differences between these two sites, they share a number of interesting similarities. Their inhabitants are subject to similar modes of racialized Othering and internal colonialism, and both places have vital links with the transnational cultural consciousness that Gilroy referred to as the Black Atlantic. Katrina and Felix also occurred at a time when centralized forms of media are increasingly perceived to be in crisis. This crisis is creating new spaces for the development of alternative ways of knowing, watching and making media. This paper draws on recent literature on decolonization by Mignolo, Escobar, Quijano and others to explore the prospects for decolonizing energies within the new media environment and a context of devastation wrought by neoliberalism and disaster. This research examines disasters in/and the new media environment, and suggests that activists should understand the distinctions between mainstream (or corporate) and alternative media, between top‐down and grassroots media, and between “old” and “new” media, in relational and non‐categorical rather than absolute terms. These media realms should be engaged from an awareness of how they interact with and impact upon one another. This research also suggests that disasters must be understood as ongoing and open‐ended events embedded within historical, social, cultural, economic and political processes and systems. Media, policymaking and emergency management practices that are informed by an awareness of this complex embedding, and which are therefore able to take a long‐term view of the unfolding of disasters, will be best equipped to engage effectively, and in democratically responsive ways, with disasters and in particular with the needs of those populations most vulnerable to their impacts.  相似文献   
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This paper argues that women's everyday practice of sharing fish at Warraber Island (Torres Strait) can be understood as a form of moral transaction. Gift‐fish are shown to be ‘socially entangled’, a fundamental mode of expressing kin relatedness as well as providing an indication of the current state of such relations. Fish distribution is portrayed locally as both an instance of generosity and of obligation, demonstrating a person's desire to engage in socially valued behaviour or correct their past failings. Importantly, I suggest that fish‐giving (and receiving) has a distinctly generational character, carrying different emphases across one's life‐span. The paper reflects on the tensions involved in strategic efforts by women to reconcile their limited capacity to meet expectations from a wide range of kin and neighbours, while affirming idealised visions of communally shared moral values.  相似文献   
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Abstract. In this paper, we suggest a framework that allows testing simultaneously for temporal heterogeneity, spatial heterogeneity, and spatial autocorrelation in β‐convergence models. Based on a sample of 145 European regions over the 1980–1999 period, we estimate a Seemingly Unrelated Regression Model with spatial regimes and spatial autocorrelation for two sub‐periods: 1980–1989 and 1989–1999. The assumption of temporal independence between the two periods is rejected, and the estimation results point to the presence of spatial error autocorrelation in both sub‐periods and spatial instability in the second sub‐period, indicating the formation of a convergence club between the peripheral regions of the European Union.  相似文献   
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