共查询到20条相似文献,搜索用时 218 毫秒
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Anna Malecka 《Iranian studies》2018,51(1):69-96
One of the most exceptional among the world renowned historical treasures is the repository of valuables of the olden shahs of Persia found in the Jewels Museum in Tehran. The outstanding jewel among those kept there is the diamond called Daryā-ye Nur, weighing about 182 carats. The history of this stone, according to the literature on the subject, starts in seventeenth century India, in the city of Golconda. Analysis of primary sources, however, allows for the supposition that this stone may have a longer history. 相似文献
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Teeth are the basis for the best methods for estimating the age-at-death of archaeological and paleontological faunal remains, because they change by eruption and wear throughout an individual's life and because they preserve well. However, age-at-death can be difficult to estimate when teeth are isolated or when no known-age reference sample is available. For these reasons, researchers developed the Quadratic Crown Height Method (QCHM), a set of quadratic formulae that can be used to predict age-at-death from tooth crown height, when unworn crown height and the ages when the tooth erupts and when its crown height should reach zero can be estimated. Previous tests of the QCHM suggest that modified equations could improve the method. Here, we use crown height measurements on a sample of 226 known-age Rocky Mountain elk (Cervus elaphus) to perform such modifications. We adjust the age at which each tooth type's crown height reaches zero from the species' potential ecological longevity or average maximum life span to an age that we empirically estimate for each tooth type. We also empirically assess whether for different elk teeth the exponent in the QCHM formula is actually equal to 2; it is for M1, but for P4 it is about 1, indicating a roughly linear relationship. The exponents for M2 and M3 are intermediate, being closer to 1.5. Because different teeth wear at different rates and wear completely away at different ages, we recommend that researchers use the modified equations provided here to estimate age-at-death for samples of Cervus elaphus. 相似文献
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美国卫生及公共服务部已宣布全国进入紧急状态,在北达科塔州洪水、总统就职典礼以及几次风灾期间,美国都曾宣布过进入这一状态慌乱你上一次经过机场安检口,要被检测体温是在什么时候?可能要追溯到2003年SARS爆发之时。但随着猪流感在全球范围的蔓延,至少在台北、东京、新加坡以及巴厘岛的机场,体温扫描仪已经悄悄地回来了,从墨西哥及美国飞来的乘客将受到特别的关注。 相似文献
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一、"车子化"运动中,全县制造的车子堆积如山
"大跃进"时期,提倡"解放思想,破除迷信,发扬首创精神,大胆革新",提出"工欲善其事,必先利其器",各区、乡、社干部群众大搞工具改革。 相似文献
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Katherine Crooks 《The Journal of imperial and commonwealth history》2018,46(3):446-472
In the early years of the twentieth century, city administrators in Halifax, Nova Scotia articulated a new, modern identity for the former imperial garrison town by identifying the local red light district as both a moral and a spatial problem. Between the twilight of Victoria’s reign and Britain’s entry into the First World War, middle-class toleration of a local sex district as a means of managing the city’s populations of imperial servicemen virtually evaporated. Haligonians were inspired instead by North American urban modernisation initiatives to eradicate this visible and physical space for the world’s oldest profession. This paper examines shifting responses to the imperial sexual and political ideologies underpinning collective toleration of Halifax’s racially mixed sex district, offers a case study of this crucial moment of civic refashioning. 相似文献
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我们正处在世纪之交。在这个转折时期,回顾过去,展望未来,可以清楚地看到一个现象:随着现代经济、特别是科技的发展,各国之间的联系愈益紧密、各国在各个领域的相互影响越来越大。世界正日益成为一个整体。可以预料,这个趋势在未来的世纪将会更加发展。面对这种情况,大至一个国家,小至一门学科,要想 相似文献
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一切的一切都是那么的自然天成,一座接一座前店后宅的粉墙黛瓦徽派建筑布满了青藤与苔癣,靠河的一边是一个个现已废弃的码头,高大的红砂石筑就的店铺横成在那里,沾满蜘蛛与苔癣的墙面上昔日徽商的店铺名依稀可见。[编者按] 相似文献
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