منابع مشابه
Reconstructing Ancient Egyptian Tombs
From the pyramids of Giza to the tombs of Thebes (modern Luxor), ancient Egypt’s glorious history has produced remarkable architecture. Sadly, the nearly four million yearly tourists have taken a heavy toll on many of these ancient structures. Of particular concern are many of the tombs located opposite to Luxor on the western bank of the Nile. Digital reconstruction of these tombs has the pote...
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The present paper divides the generally recognized Xianbei tombs into five groups. The first group is in the Hailar River valley; the second group, in the West Liaohe River valley; the third group, in the Chaoyang area; the fourth group, along the boundary between Inner Mongolia and Shanxi; and the fifth group, in northern Shanxi, middle Inner Mongolia and the zone a little west of them. In cul...
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Spinal osteophytic changes are known to be affected by differences in age, sex, population, and mechanical stress. We examined Joseon skeletons (n=87) to obtain vertebral osteophytosis data on a pre-modern Korean population. The mean osteophytic value (MOV) of vertebrae increased in the cervical-thoracic-lumbar order. More severe osteophytosis was found in the vertebrae (C5, T9, T10, and L4) fa...
متن کاملBounds on Long-Lived Relics from Diffuse Gamma Ray Observations
We place bounds on long-lived primordial relics using measurements of the diffuse gamma ray spectrum from EGRET and COMPTEL. Bounds are derived for both radiative and hadronic decays with stronger bounds applying for the latter decay mode. We present an exclusion plot in the relic density–lifetime plane that shows nontrivial dependence on the mass of the relic. The violations of scaling with ma...
متن کاملRNA Second Messengers and Riboswitches: Relics from the RNA World?
C ompelling evidence supports the hypothesis that modern cells descended from organisms whose components were made entirely of RNA. Scientists who helped formulate this “RNA World” hypothesis for the evolution of life have identified many characteristics of modern cells that strongly suggest RNA once ruled the planet. For example, the existence of selfcleaving and self-splicing ribozymes that c...
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ژورنال
عنوان ژورنال: Man
سال: 1901
ISSN: 0025-1496
DOI: 10.2307/2840093