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Thomas H.V. Rich Michael Archer 《Alcheringa: An Australasian Journal of Paleontology》2013,37(3):197-208
Namilamadeta snideri new genus and species, from the medial Miocene Namba Formation, was found on the western side of Lake Tarkarooloo, South Australia. It is tentatively assigned to the Wynyardiidae and may be the plesiomorphous sister group of the Vombatidae. 相似文献
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Will Archer Cornel M. Pop Zeljko Rezek Stefan Schlager Sam C. Lin Marcel Weiss Tamara Dogandžić Dawit Desta Shannon P. McPherron 《Archaeological and Anthropological Sciences》2018,10(8):1991-2003
The archaeological record represents a window onto the complex relationship between stone artefact variance and hominin behaviour. Differences in the shapes and sizes of stone flakes—the most abundant remains of past behaviours for much of human evolutionary history—may be underpinned by variation in a range of different environmental and behavioural factors. Controlled flake production experiments have drawn inferences between flake platform preparation behaviours, which have thus far been approximated by linear measurements, and different aspects of overall stone flake variability (Dibble and Rezek J Archaeol Sci 36:1945–1954, 2009; Lin et al. Am Antiq 724–745, 2013; Magnani et al. J Archaeol Sci 46:37–49, 2014; Rezek et al. J Archaeol Sci 38:1346–1359, 2011). However, when the results are applied to archaeological assemblages, there remains a substantial amount of unexplained variability. It is unclear whether this disparity between explanatory models and archaeological data is a result of measurement error on certain key variables, whether traditional analyses are somehow a general limiting factor, or whether there are additional flake shape and size drivers that remain unaccounted for. To try and circumvent these issues, here, we describe a shape analysis approach to assessing stone flake variability including a newly developed three-dimensional geometric morphometric method (‘3DGM’). We use 3DGM to demonstrate that a relationship between platform and flake body governs flake shape and size variability. Contingently, we show that by using this 3DGM approach, we can use flake platform attributes to both (1) make fairly accurate stone flake size predictions and (2) make relatively detailed predictions of stone flake shape. Whether conscious or instinctive, an understanding of this geometric relationship would have been critical to past knappers effectively controlling the production of desired stone flakes. However, despite being able to holistically and accurately incorporate three-dimensional flake variance into our analyses, the behavioural drivers of this variance remain elusive. 相似文献
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Accessibility is now a common way to measure the benefits provided by transportation–land use systems. Despite its widespread use, few measurement options allow for the comparison of accessibility across multiple urban systems, and most do not adequately control for market competition between demand-side actors and supply-side facilities in localized markets. In this article, we develop a measure of competitive access to destinations that can be used to accurately compare accessibility between regions. This measure stems from spatial interaction modeling and accounts for competition at both the supply and demand sides of analysis, regional differences in transportation networks and travel behavior, and any imbalance between the size of the population and the number of opportunities. We use this method to compute access to employment for Canada's eight largest cities to comparatively examine inequalities in accessibility, both within and between cities, and by travel mode. 相似文献
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Jeff Roquen 《European Review of History》2017,24(6):889-904
AbstractThe Janus-faced character of nineteenth-century Europe presents unique challenges to historians. Concurrent to spiralling industrial growth, working-class revolts, transatlantic migration and imperialism, the stark social and economic upheaval of the period has virtually belied the solidarity achieved on the Continent. In recent years, however, a number of superlative scholarly studies have excavated and illuminated the intellectual, legal and technological revolutions that ushered in an era of promise and potential unity. In this article, the author examines the degree of interdependence and interconnectedness across the Continent and the world by melding extant scholarship, introducing primary-source research, and offering new perspectives on the relationship of the increasingly globalized world and the European efforts to harness its potential by attempting to create lasting norms for peace and prosperity through international law and the benchmark concept of ‘humanity’. 相似文献
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