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51.
Kristin M. Hedman B. Brandon Curry Thomas M. Johnson Paul D. Fullagar Thomas E. Emerson 《Journal of archaeological science》2009
Strontium isotope values (87Sr/86Sr) in bone and tooth enamel have been used increasingly to identify non-local individuals within prehistoric human populations worldwide. Archaeological research in the Midwestern United States has increasingly highlighted the role of population movement in affecting interregional cultural change. However, the comparatively low level of geologic variation in the Midwestern United States might suggest a corresponding low level of strontium variation, and calls into question the sensitivity of strontium isotopes to identify non-local individuals in this region. Using strontium isotopes of archaeological fauna, we explore the degree of variability in strontium ratios across this region. Our results demonstrate measurable variation in strontium ratios and indicate the potential of strontium analysis for addressing questions of origin and population movement in the Midwestern United States. 相似文献
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Nigel Thrift 《Transactions (Institute of British Geographers : 1965)》2005,30(2):133-150
I take as my starting point the fact that Western cities are often depicted as on the brink of catastrophe. Indeed some contemporary authors would argue that they have never been closer to that brink. The first part of this paper argues against this tendency by focusing on the preponderance of activities of repair and maintenance. Having looked at the state of this forgotten infrastructure, in the second part of the paper I turn to an examination of why this Cassandra interpretation is so prevalent. I argue that, in particular, it draws on wellsprings of misanthropy which are rarely voiced in writings on cities because sociality is too often confused with liking. Yet it seems vital to me to tackle misanthropy head on. Then, in the third part of the paper, I argue that currently there is a coming together in cities of all kinds of affective politics of concern which can act, through all manner of small achievements, as a counter to misanthropy but which do not mistake the practice of this politics for a search after perfection. 相似文献
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Nigel Aston 《Parliamentary History》2024,43(1):72-90
In terms of the unreformed franchise operative in the early 18th century, the University of Oxford made up an unusual parliamentary constituency. Here it was the votes of non-resident members that could be decisive to the outcome if the seat was contested. In late Stuart and early Hanoverian Oxford, Tories were almost certain to be returned but, in the general election of 1722, the Tory vote was split between rival candidates offering a possible opening for Oxford Whigs. This essay considers the varieties of electoral behaviour inside the university at this time of exceptional political flux nationally, how the candidates confronted the practical problem of getting ‘outvoters’ into Oxford, and the extent to which the heads of the colleges could rely on a sufficiently stable corporate identity to have their resident members vote in an approved way. The 1722 general election again raised questions as to who exactly was entitled to vote in a university constituancy, how much illegal voting was going on, and whether it was in a candidate's best interests either to connive or draw attention to it. The eventual choices made by the Oxford electorate would signal where the university stood in the wider political picture of the early 1720s, how far it – and the varieties of toryism it contained – was prepared to endorse the legitimacy of the new Hanoverian order. 相似文献
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Leslie Curry 《Geographical analysis》1976,8(4):339-353
A self-contained spatial economy is set out as the steady-state of a harmonic oscillator under Gaussian excitation. A dollar bill performs a random walk on a line with elastic barriers at each end and represents payments for traded goods. Diffusive surges of money and the fluctuations in zonal incomes are examined. The center, being less dependent on extra-zonal trade, has fewer brakes on price levels and can more easily begin “inflation.” Imposing a uniform deflationary policy would cause the periphery to be squeezed without reason while the center would be affected too little and too late. The organization of a futures market in construction is analyzed as a spatially discriminating form of control. 相似文献
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A series of quantitative methods for investigating the basis for preference for landscape scenes was applied to photographs of alpine and subalpine landscapes in Alberta. The procedure incorporates a multidimensional scaling analysis with the repertory grid technique and also employs a property vector-fitting algorithm as an aid in interpreting the dimensional solution. The preferences of a sample group were based on three criteria. In order of importance, these are character of vegetation cover, depth of field, and elevation of terrain. Additional validation of the results was obtained through a principal components analysis of the repertory grid data. 相似文献
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Cristina Cobo Castillo Katsunori Tanaka Yo-Ichiro Sato Ryuji Ishikawa Bérénice Bellina Charles Higham Nigel Chang Rabi Mohanty Mukund Kajale Dorian Q Fuller 《Archaeological and Anthropological Sciences》2016,8(3):523-543
We report a successful extraction and sequencing of ancient DNA from carbonized rice grains (Oryza sativa) from six archaeological sites, including two from India and four from Thailand, ranging in age from ca. 2500 to 1500 BP. In total, 221 archaeological grains were processed by PCR amplification and primary-targeted fragments were sequenced for comparison with modern sequences generated from 112 modern rice populations, including crop and wild varieties. Our results include the genetic sequences from both the chloroplast and the nuclear genomes, based on four markers from the chloroplast and six from the nuclear genome. These markers allow differentiation of indica rice from japonica rice, the two major subspecies of Asian rice (O. sativa) considered to have separate geographical origins. One nuclear marker differentiates tropical and temperate forms of subspecies japonica. Other markers relate to phenotypic variation selected for under domestication, such as non-shattering, grain stickiness (waxy starch) and pericarp colour. Recovery and identification of sequences from nuclear markers was generally poor, whereas recovery of chloroplast sequences was successful, with at least one of four markers recovered in 61 % of archaeological grains. This allowed for successful differentiation of indica or japonica subspecies variety, with japonica identified in all the Thai material and a mixture of indica and japonica chloroplasts in the two Indian assemblages. Rice subspecies was also assessed through conventional archaeobotanical methods relying on grain metrics, based on measurements from 13 modern populations and 499 archaeological grains. Grain metrics also suggest a predominance of japonica-type grains in the Southeast Asian sites and a mixture of japonica and indica in the Indian sites with indica in the minority. The similar results of grain metrics and ancient DNA (aDNA) affirm that grain measurements have some degree of reliability in rice subspecies identification. The study also highlights the great potential of ancient DNA recovery from archaeological rice. The data generated in the present study adds support to the model of rice evolution that includes hybridization between japonica and proto-indica. 相似文献
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