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1.
This paper describes a system of versatile software packages that has been developed by the author for population analysis on IBM-compatible microcomputers using PC or MS DOS. The series includes programs for the production of life tables, the analysis of spatial patterns and temporal trends in mortality, population projections, stationary-state population simulations and demographic planning, cohort survival estimates of net migration, and the analysis of migration matrices. Each of the programs in the series is discussed in terms of its principal analytical features, associated conceptual and methodological issues, and potential applications. The programs are intended for use both as basic research and planning tools and as instructional aids in university-level courses. The programs and related documentation are available on a set of four 360K diskettes.  相似文献   
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This paper examines the history of African metallurgy in the era of Atlantic trade. It reports on excavations at the John Reeder foundry site in St Thomas, Jamaica. The transfer of African technologies to the Caribbean reveals the plantation economy's dependence on African technical expertise, not merely slave labour. The comprehensive focus on the Atlantic world also informs archaeological investigations of African-European interaction in West Central Africa. The complexity of Atlantic technological history is characterized by a diverse range of dynamic interactions, rather than the inevitable decline of Africanderived systems. Only by identifying processes as well as products of African technological interaction will it be possible fully to reconstruct the forging of the African past.
Résumé Cet article examine l'histoire de la métallurgie africaine à l'ère du commerce atlantique. Il rend compte des excavations au site de la fonderie John Reeder, à St Thomas, en Jamaïque. Le transfert des technologies africaines aux Antilles révèle à quel point l'économie de plantation dépendait de l'expertise technique africaine, et pas seulement de l'esclavage. L'accent placé sur le monde atlantique inspire aussi les recherches archéologiques sur l'interaction afro-européenne à l'ouest de l'Afrique centrale. La complexité de l'histoire technologique atlantique est caractérisée par une gamme diverse d'interactions dynamiques, plutôt que par l'inévitable déclin des systèmes africains dérivés. Ce n'est qu'en identifiant les processus aussi bien que les produits de l'interaction technologique africaine qu'il sera possible de reconstruire complètement l'élaboration du passé africain.
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Reading Aristotle and applying his notion of philia, or political friendship, across 26 centuries sheds significant light into Abraham Lincoln’s career. It is precisely in Lincoln’s embodiment of the Aristotelian notion of friendship that we come to understand his unique greatness. Perhaps he alone of all Americans proved capable of such extraordinary feats as leading the Republican party to victory in 1860, holding the Union together through the secession crisis and four long years of bloody civil war, ending slavery without white backlash, and offering reconciliation with the incredible magnanimity expressed in the ringing phrases of the Second Inaugural address. The basis of Lincoln’s preternatural political genius proved to be his ability to comprehend all sides, a comprehension that can only come from a profound belief in the importance of friendship. Americans, Lincoln argued throughout a terrible war as he had his entire life, were not enemies but friends who shared a commitment to nature and nature’s law as expressed in the Declaration.  相似文献   
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Combining an analysis of the compliance incentives faced by firms in an emissions trading program, a comprehensive review of the enforcement strategies employed in Sulfur Dioxide Allowance and the Regional Clean Air Incentives Market (RECLAIM) programs, and a review of the compliance performance of these programs thus far, we are able to propose several practical guidelines for enforcing emissions trading programs. We stress the importance of prevailing market prices for emissions permits in determining compliance incentives, the importance of accurately measuring firms' emissions, and the importance of implementing enforcement strategies that remove the incentives firms may have to falsify emissions reports.  相似文献   
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Paleoclimatic data from the tropical Pacific islands are compared to archaeological evidence for fortification construction in the Holocene. The results suggest that in some regions, people constructed more fortifications during periods that match the chronology for the Little Ice Age (AD 1450–1850) in the Northern Hemisphere. Periods of storminess and drought associated with the El Niño Southern Oscillation have less temporal correlation with the emergence of fortifications in the Pacific, but significant spatial correlation with the most severe conditions associated with this cycle. These temporal and spatial correlations require additional study to investigate possible causal relationships.  相似文献   
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Recent multidisciplinary investigations document an independent emergence of agriculture at Kuk Swamp in the highlands of Papua New Guinea. In this paper we report preliminary usewear analysis and details of prehistoric use of stone tools for processing starchy food and other plants at Kuk Swamp. Morphological diagnostics for starch granules are reported for two potentially significant economic species, taro (Colocasia esculenta) and yam (Dioscorea sp.), following comparisons between prehistoric and botanical reference specimens. Usewear and residue analyses of starch granules indicate that both these species were processed on the wetland margin during the early and mid Holocene. We argue that processing of taro and yam commences by at least 10,200 calibrated years before present (cal BP), although the taro and yam starch granules do not permit us to distinguish between wild or cultivated forms. From at least 6950 to 6440 cal BP the processing of taro, yam and other plants indicates that they are likely to have been integrated into cultivation practices on the wetland edge.  相似文献   
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In 1921, bride Toy Len Goon (1892–1993), a peasant from Guangdong (Canton) South China, emigrated to Portland, Maine, USA where she and her husband ran a suburban laundry. She became a respected member of the community and, in 1952, American ‘Mother of the Year’. This article follows her biography by investigating a group of four recently rediscovered tunic and trouser suits preserved from her trousseau. The suits are made of Guangdong mud silk, a two-colour fabric distinguished by its black upper surface and brown underside. Mud silk is a little recognised, studied or collected South-East Asian textile. By examining mud silk and its manufacture within the context of Guangdong’s rise and decline as a major silk producer and exporter, this article contributes a new perspective to the present limited body of research on this regional textile.  相似文献   
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