منابع مشابه
Chalcedony and Childbirth: Precious and Semi-Precious Stones as Obstetrical Amulets **
It is also profitable to wear about them gemmes and precious stones, as the The custom of wearing or holding an amulet during pregnancy and childbirth is probably as ancient as the need for comfort and reassurance. For reasons not entirely clear, precious and semi-precious stones throughout recorded time have been considered to possess protective virtues."'8 The medical benefits ascribed to eac...
متن کاملArtificial Neural Networks for Diagnosis of Kidney Stones Disease
Artificial Neural networks are often used as a powerful discriminating classifier for tasks in medical diagnosis for early detection of diseases. They have several advantages over parametric classifiers such as discriminate analysis. The objective of this paper is to diagnose kidney stone disease by using three different neural network algorithms which have different architecture and characteri...
متن کاملThree-dimensional fracture and fragmentation of artificial kidney stones
The brittle fracture of a gypsum cylinder, which is used as an artificial kidney stone in lithotripsy research, is simulated by the use of the finite element method. The cylinder is submerged in water and is subjected to a pressure front parallel to one of its planar faces. The stresses induced by the pressure wave lead to fracture in the interior of the cylinder, with the formation of a spall ...
متن کاملThe electrochemical behaviour of various non-precious Ni and Co based alloys in artificial saliva.
Five non-precious Ni-Co based alloys were analyzed with respect to their corrosion behaviour. The correlation between the amount of the elements Cr, Mo, V and the corrosion behaviour, expressed by the PREN (pitting resistance equivalent number) index in the case of the allied steels, was extended for Ni-Cr and Co-Cr dental alloys characterization. Open circuit potential, corrosion current densi...
متن کاملEurope's precious children.
The Author 2005. Published by Oxford University Press on behalf of the European Public Health Association. All rights reserved. doi:10.1093/eurpub/cki218 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Editorial . . . . . . . . ....
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ژورنال
عنوان ژورنال: Scientific American
سال: 1862
ISSN: 0036-8733
DOI: 10.1038/scientificamerican07121862-23