منابع مشابه
Wastewater Treatment of Stone Cutting Industries by Coagulation Process
Background & Aims of the Study: The wastewater created as a result of stone cutting industries enters some pools for re-consumption so that its suspended solids settle by gravity. By taking to account the high volume of water and sludge, treatment of wastewater and removal of sludge cause many problems for stone cutting units. The objective of this study was to determine the quality of wast...
متن کاملFrom ‘stone cutting’ to high-technology methods: The changing face of stone surgery
The surgical management of urolithiasis, in particular cystolithiasis, has been known for more than two millennia. The term lithotomy was first used by the Greek surgeon Ammonius (276 BCE), but the practice of cutting the stone would have existed long before that. However, Hippocrates (460 BCE) discouraged the procedure. His oath reads: ‘I will not cut persons labouring under the stone, but wil...
متن کاملRespirable Silica Dust Suppression During Artificial Stone Countertop Cutting
PURPOSE To assess the relative efficacy of three types of controls in reducing respirable silica exposure during artificial stone countertop cutting with a handheld circular saw. APPROACH A handheld worm drive circular saw equipped with a diamond segmented blade was fitted with water supply to wet the blade as is typical. The normal wetted-blade condition was compared to (i) wetted-blade plus...
متن کاملPointed and multi-pointed partitions of type A and B
The aim of this paper is to define and study pointed and multi-pointed partition posets of type A and B (in the classification of Coxeter groups). We compute their characteristic polynomials, incidence Hopf algebras and homology groups. As a corollary, we show that some operads are Koszul over Z. Introduction For every finite Weyl group W , there exists a generalized partition poset (cf. [2]) d...
متن کاملEgyptian ever-married women's attitude toward discontinuation of female genital cutting.
INTRODUCTION This study aimed to examine Egyptian ever-married women's beliefs and attitude toward the discontinuation of female genital cutting (FGC). We also examined the significant sources of information which the women with positive attitude were exposed to the year prior to the survey. METHODS In a national representative community-based sample of 15,573 ever-married Egyptian women, the...
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ژورنال
عنوان ژورنال: Journal of the Franklin Institute
سال: 1838
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(38)92011-3