منابع مشابه
Preventing eye injuries in quarries
Eye injuries often occur in the workplace in low and middle-income countries, particularly in the construction, agricultural, mining, and manufacturing industries. Even if there are safety regulations in these industries, their enforcement is often unsatisfactory, and owners are not required to provide safety equipment. In 2005, Christian Medical College in Vellore, India, conducted a pilot stu...
متن کاملFasting and urinary stones
Introduction: Fasting is considered as one of the most important practices of Islam, and according to Prophet Mohammad, fasting is obligatory upon Muslims. The aim of this study is to evaluate the effects of fasting on urinary stones. Materials and Methods:Very few studies have been carried out on urinary stones and the effect of Ramadan fasting. The sources of the present study are Medline and...
متن کاملDecay factors and patterns of stones in open-air historical sites built of carbonate sedimentary stones
The number of historical open-air sites built of stone are relatively limited in comparison to the other historical artificial in Iran, but these sites include great significance in terms of value, historic and their knowledge of past. Since these stone poen-air sites are generally about two thousand years old, they have been exposed to decay factors for a long time. Many information and data o...
متن کاملA Survey on the Presence of Calcifying Nanoparticles in Renal Stones, Gallbladder Stones and Atherosclerosis Plaque
Background & Aims: Calcifying nanoparticles are different forms of calcium and phosphate in sediments. Recent evidence suggests that calcifying nanoparticles (CNPs) are probably selfreplicating. Several diseases are linked to nano-bacteria including kidney stones, gallbladder stone, cardiovascular plaques, oral–dental plaque, many cancers, and autoimmune diseases. The aim of this study was to a...
متن کاملA Short-term Production Planning Model for Dimension Stone Quarries
In this paper, problem of short-term production planning for dimension stone quarries was mathematically modeled using a binary integer programming. The model includes an objective function, which was founded as the minimization of the costs due to the total cutting planes of the blocks. This objective may cause to maximization of the net present value (NPV) in dimension stone quarries. During ...
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ژورنال
عنوان ژورنال: Nature
سال: 1921
ISSN: 0028-0836,1476-4687
DOI: 10.1038/107423b0