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Data are presented on 45 cranial non-metric traits in skeletal samples of the Lower Nubian A-Group (ca. 3100–2500 BC) and C-Group (ca. 2000–1500 BC) cultural periods. Results, based on the mean measure of divergence statistic, reveal biological continuity, consistent with interpretations of in situ evolution as opposed to models of discontinuity resulting from gene flow. Any differences between the A-and C-Group cultural phases that may be evident in the archaeological record are therefore more likely the result of local cultural evolution, rather than the introduction of new ideas, customs, and materials through the migration of a new population into this area. The problem of small samples necessitates that our results be accepted cautiously. 相似文献
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A series of 28 “depth” measurements, from a fixed plane to a bone surface (the frontal bone of the human skull), is presumed to contain information about shape. Data are presented for three groups of skulls and a few problematic single ones. A simple method for reducing the 28 measurements to a few shape contrasts is described. Reasons why the data are unsuitable for a canonical analysis are discussed and possible problems arising from the uncritical use of canonical analysis in general are pointed out. Some general comments are made as to the relative morphological affinities of the comparative groups selected, and especially the single more controversial specimens. 相似文献
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The soluble and exchangeable ions for a soil profile from the Roonka archaeological site. Lower Murray Basin, South Australia, are compared with the total elemental content of the soils. Since the chemical composition of post-mortem ionic substitution phases and secondary minerals in archaeological bone will depend on the availability of ions to the soil solution under field conditions, it is suggested that models addressing diagenesis in bone employ soluble and exchangeable ions rather than total elemental soil data. 相似文献
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The production of amber ornaments occurred in Italy during the Eneolithic (E)–Early Bronze Age (EBA), although very few beads from the Italian peninsula have been found and analysed. The number of data available for provenience study of Bronze Age ambers is larger, but still a precise picture of when and to what extent the local sources of amber were exploited is lacking. In the present work, 22 amber finds from six Sicilian sites have been studied and analysed by infrared spectroscopy, in particular with DRIFT (diffuse reflectance infrared Fourier transformed) analyses. The amber samples are dated between the Eneolithic and the Final Bronze Age–Early Iron Age and are from the collections of the P. Orsi Museum, in Syracuse (Sicily). The data show that only simetite was used in South Italy in the Late Eneolithic (LE)–EBA. In the Bronze Age, the exploitation of simetite shows different intensity in different chronological phases. The results are discussed in comparison with the information available for coeval European ambers. 相似文献
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近代新式棉纺织企业工头制管理方式浅析 总被引:1,自引:0,他引:1
本文采用交易费用经济学分析框架,借助于民国时期棉纺织企业佣工的相关数据,解释了当时企业内部管理方式的演变.根据史实论断,当时企业内部的人员(企业所有者、管理者和工人)形成了一个社会网络,所有者和管理者(工头--所有者的代理人)可以认为是社会网络上的节点.当企业的规模较小时,这个社会网络可以节省工头管理工人的交易费用;然而,当企业规模越来越大时,由于网络内信息传递成本的提高,社会网络反而成为增加交易费用的原因.最终,企业所有人会倾向于采取新型管理方式,摆脱工头制度对企业发展的束缚. 相似文献
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Wind direction data were used to calculate the percentage time during which winds blew over the principal sources of air pollution at Port Kembla into each of the surrounding residential suburbs for each month of 1980. The percentage wind frequencies (PWFs) correlated well with measured concentrations of airborne metals in the suburbs and with measured rates of metal deposition in moss bags located in suburbs adjoining the air pollution sources. PWFs for all suburbs exhibited winter minima and spring-summer maxima, with the highest PWFs being calculated for suburbs south to south-west of the industrial area and the lowest for suburbs lying to the west. Where experimental data are not available, PWFs could provide an indication of air quality for land-use planning and zoning. 相似文献
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Mark Francis 《Australian journal of political science》1983,18(2):93-99
A paradigm is a methodological device which historians of political thought borrow from the history of science. The initial part of this article examines the views of three distinguished historians of political thought—Sheldon Wolin, Alan Ryan and John Pocock—who have borrowed paradigms. Wolin and Ryan are shown to have confused paradigms with weltanschauungen in such a way as to make the former less useful as methodological devices. Pocock, on the other hand, has been successful in his use of paradigms, though he does not sufficiently recognise their methodological limits. He also raises a conceptual problem. The latter part of this article examines the recent history of science in an attempt to clarify the use of paradigms and their limits. 相似文献
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大高殿建于明嘉靖二十一年(1542年),是明代皇室、宫官婢女演练道教科仪的场所,也是明清两代皇帝祈祷上天、求雨祈晴的地方。清朝统治者采取儒、道、释并用的政策,注重对大高殿的利用,尤其是雍正、乾隆、嘉庆、道光、光绪等朝,屡次对其进行修缮,以备皇帝亲诣拈香。本文对清代的常修、大修及八国联军对大高殿的破坏等档案史料进行梳理,并进一步阐释了清王朝对之的使用和管理。 相似文献
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《Journal of Atmospheric and Terrestrial Physics》1979,41(6):647-655
The large set of data obtained from 6 years of observations by the Garchy meteor radar yields a picture of the mean zonal circulation in the 75–105 km range at 47°N. The annual wind pattern shows that the lower meteor heights (80–90 km) are characterized by strong vertical and seasonal changes and mark a region of transition between the mesospheric monsoonal circulation observed up to around 85 km and another type of circulation above 90 km characterized by a strong steady eastward circulation in the summer and a weak circulation during the rest of the year. These features were also observed over Kiruna (68°N) by another CNET meteor radar situated at this place for 1 yr. The annual wind component prevails in the meteor range and is nearly out of phase below and above the 85–90 km level. Comparisons made with the results from other stations show that these characteristics are probably planetary in character. 相似文献
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明代五爪龙纹的使用规制问题文献记载不明且学界分歧显著。通过梳理明代五爪龙纹瓷的使用人群和使用情况,考述明代礼仪制度中的相关规定,可以看出:明代礼仪制度下,皇帝、亲王、郡王和大乘法王都有资格使用五爪龙纹;但除皇帝外,余者不能擅自生产龙纹器;官民禁用龙纹,但御赐者不在禁列。明代五爪龙纹的使用规制不仅着眼于身份等级的配享,更注重于来源途径的合法。明代五爪龙纹瓷的使用情况在嘉靖朝前后发生了显著改变,嘉靖之前符合礼仪制度,且不存在超逾级别的特赏;嘉靖以来,出现了违背禁限的现象,成为晚明社会"僭礼坏乐"的真实写照。 相似文献
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J.P.N Watson 《Journal of archaeological science》1979,6(2):127-137
The difficulties in the estimation of relative frequencies of species are discussed and a new approach to the recording of bone is proposed. This approach eliminates various biases and allows minimum numbers of individuals and counts of identified specimens to be derived from the same data. Sieved material from Khirokitia is used to provide a comparison of different methods and to illustrate possible ways of recording the information. 相似文献