نتایج جستجو برای: cause of being
تعداد نتایج: 21186196 فیلتر نتایج به سال:
In order to use TNT in military industries, its impurities have to be removed. The further nitration of m-nitrotoluene (by-product of the first step nitration), cause to the formation of asymmetric products which during the purification step, these tri-nitrated and asymmetric products lead to the formation of red water as a main environmental pollutant. This pollutant remains in the environment...
Introduction: Level of mothers’ literacy, pregnancy history of more than four times, residence in villages, lack of receiving intensive care during pregnancy, as well as inaccessibility to obstetric emergency services have been reported, in Iran and the world, as major factors for maternal mortality. Considering significance of identifying indirect causes of maternal mortalitie...
Introduction: The term glaucoma refers to a group of diseases that have a characteristic optic neuropathy with associated visual field loss in common. Intraocular pressure has been considered to be the only causal factor for glaucoma and the only factor that can be manipulated to alter the course of the disease. But considering high intraocular pressure as the only factor responsible for glauco...
Background and Aim: the current study aims to determine factors which may cause negative feeling such as fear, uncertainty and anxiety during information seeking process. Method: In this review paper, different library resources and databases were searched in the areas of library anxiety, Internet anxiety, computer anxiety, information seeking, information searching and information retrieval t...
Collateral contracts which are concluded to guarantee and facilitate the collection of debts, as subordinate contracts, are always based on a basic relationship and debt. The Conclusion of the collateral contracts, including transition and guaranteed collateral contract, about a debt that has been fully formed and proven to be on the debtor's obligation, undoubtedly is correct and valid. About ...
Background and purpose: Physiological changes in pregnancy cause profound challenges to mental health. The aim of this study was to investigate the effect of counseling based on Information-Behavioral Motivation Model on health promoting lifestyle behaviors and psychological well-being in overweight and obese pregnant women. Materials and methods: This randomized clinical trial was performed i...
The structure signature of a system made up of n components having continuous and i.i.d. lifetimes was defined in the eighties by Samaniego as the n-tuple whose k-th coordinate is the probability that the k-th component failure causes the system to fail. More recently, a bivariate version of this concept was considered as follows. The joint structure signature of a pair of systems built on a co...
Preventive maintenance is required to keep critical systems available at reasonable costs. Instead of applying the traditional experience-based approach of statistical analysis of failure data, the present paper proposes to adopt a predictive maintenance policy that relies on detailed knowledge of the physical failure mechanisms. A structured scheme for this approach is presented. Then three ca...
We describe a simulator for modeling complex control dynamics in optical line systems involving the interaction of multiple transmission, control, and monitoring elements in response to channel changes, component failure, and recovery events.
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