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Mark Collard Briggs Buchanan Marcus J. Hamilton Michael J. O’Brien 《Journal of archaeological science》2010
Despite the importance of the Clovis–Folsom transition for understanding the history of western North America, its spatiotemporal dynamics remains unclear. Here we report a three-part study in which we investigated the transition using radiocarbon dates from Clovis and Folsom sites. In the first part of the study, we used dates from Folsom site-phases to determine when and where Folsom originated. In the second part of the study, we employed Clovis and Folsom dates in analyses designed to determine whether Folsom spread via demic diffusion or cultural diffusion. In the third part of the study we investigated the velocity of the Clovis–Folsom transition. The analyses suggest that Folsom first appeared around 12,800 calBP in the northern High Plains and spread north and south from there. They also suggest that the spread of Folsom was, at least in part, the result of population expansion. In addition, the analyses indicate that the spread of Folsom was relatively fast for a prehistoric diffusion but well below the maximum velocity that has been estimated for such events. These findings, in turn, have implications for the hypotheses that have been put forward to explain the Clovis–Folsom transition. They refute the idea that the Clovis–Folsom transition resulted from an extraterrestrial impact over northern North America at 12,900 ± 100 calBP but are consistent with the alternative proposal that the transition was a response to climate-driven environmental change. 相似文献
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梁立基 《华侨华人历史研究》2004,(3):23-34
华人在印尼的历史已有上千年。在西方殖民者入侵前 ,华人与原住民一向和睦相处 ,对繁荣当地经济做出了重要贡献。荷兰殖民统治后 ,大批华人到印尼谋生或被掳掠当劳工 ,他们全面参与了印尼经济从自然经济向市场经济的过渡并发挥了重要作用。 2 0世纪 ,在印尼出现了华人和原住民两种民族觉醒和双轨的民族运动 ,在争取民族独立的斗争过程中二者逐渐汇合并轨。印尼独立后 ,原住民中的“原住民主义”思想抬头 ,曾出现大规模的经济排华。“新秩序”时期 ,“原住民主义”思想变本加厉 ,对华人采取强制、快速和彻底的同化政策 ,企图通过消灭华人的“一切特性”以实现完全的“原住民化” ,导致 1 998年的“五月骚乱”和“新秩序”政权的垮台。印尼进入民主改革时期之后 ,对华人的历史地位、作用和贡献才有了比较客观和公正的评价 相似文献
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Briggs Buchanan Marcus Hamilton Kevan Edinborough Michael J. O’Brien Mark Collard 《Journal of archaeological science》2011
We show that Steele’s (2010) criticisms of Hamilton and Buchanan (2007) and Buchanan et al. (2008) do not hold water and demonstrate that his re-analyses of Hamilton and Buchanan’s (2007) and Buchanan et al'.s (2008) datasets are flawed. In the process, we highlight some important issues for researchers interested in using radiocarbon dates to reconstruct population movements and demography. Most notably, we explain why OLS regression is preferable to RMA regression when estimating diffusion velocity, and demonstrate that the summed probability distributions yielded by CalPal are more reliable as guides to past demographic change than those produced by Calib and OxCal. 相似文献
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王守仁平定宁王宸濠叛乱,不论是对当时朝廷还是对王守仁本人,都是一件大事。然而关于王守仁的献俘行迹,史载却颇多错乱。故宫博物院藏王守仁书《铜陵观铁船歌》长卷,是一件非常珍贵的历史资料,不仅对于考证正德十四年九月至正德十五年三月王守仁平定宁王宸濠叛乱后的三次献俘行迹与艰难处境有很大帮助,对于了解王守仁遭遇政坛险恶与人生坎坷的复杂心理也有很大裨益。 相似文献
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《历史地理学杂志》是一份具有高学术质量的历史地理学国际学术期刊。通过对《历史地理学杂志》1981~2010年间所发表的论文、书评等的统计分析,结果表明,过去30年间,在研究内容方面,历史地理研究涉及5大领域18个方面,历史人文地理研究始终是热点领域,历史自然地理研究始终是薄弱环节,历史文化地理研究越来越热;在作者来源方面,历史地理作者来自全球36个国家,欧美化现象十分突出,英国、美国、加拿大籍作者占90%以上,与此同时,多元化特征趋弱,作者国籍从1981~1990年间的35个国家减少到2001~2010年间的19个国家;在研究区域方面,热点区域是欧美发达国家,对英国、美国、法国、加拿大4国的研究最多,欧洲、非洲、太平洋地区、加勒比海地区、大西洋等地区也受到较多关注。 相似文献
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以关天经济区为案例地,运用空间统计工具,将市、县、镇三个尺度的人口空间变化纳入统一的分析框架,探究不同尺度的人口时空格局及影响机制,分析尺度间差异。研究表明:①在人口空间格局上,市级层面西安市是经济区人口分布的核心;县级层面区域人口沿渭河呈带状分布格局;镇级层面人口以西安为中心沿交通轴线向外围递减;②经济区人口格局整体呈现空间集聚趋势,并在各尺度间表现出明显差异。在市级层面,区域人口加速向西安集中;在县级层面,人口主要向地级市市区集中;在镇级层面,出现两种人口集聚路径:一是地级市市区内,人口大量向近郊集聚,中心城区人口快速缩减,郊区化特征明显,二是在市区外围,人口明显向各县城集聚,绝大多数乡镇人口下降。 相似文献