نتایج جستجو برای: can cause risks.
تعداد نتایج: 3087642 فیلتر نتایج به سال:
abstract: country’s fiber optic network, as one of the most important communication infrastructures, is of high importance; therefore, ensuring security of the network and its data is essential. no remarkable research has been done on assessing security of the country’s fiber optic network. besides, according to an official statistics released by ertebatat zirsakht company, unwanted disconnec...
insurers have in the past few decades faced longevity risks - the risk that annuitants survive more than expected - and therefore need a new approach to manage this new risk. in this dissertation we survey methods that hedge longevity risks. these methods use securitization to manage risk, so using modern financial and insurance pricing models, especially wang transform and actuarial concepts, ...
background: including multivariate survival data can be pointed competing risks data. there are various methods to analyze such data such as semi-parametric methods of cause-specific hazard function, and cumulative incidence function. the aim of this study was to deploy competing risks model to analyze the determinants of patients with liver cirrhosis. materials and methods: during the one-year...
background & aim: we aimed to describe a standard survival analysis, so that we can analyze some factors related to the time of occurrence of different types of reflux (unilateral-left, unilateralright, and bilateral) in children with antenatal hydronephrosis (anh) and to provide an approach taking competing risks into account. methods & materials: we used data of 193 children that was collecte...
A wear metal profile is often prepared for each engine. Typically an early wear-in period of high metals concentration is observed, followed by a plateau of low metals concentration [2]. Impending component failure will be indicated by a rapid increase in wear metal concentration, or the sudden appearance of a metal. The metal type and concentration may also indicate to the analyst and engineer...
assessment of risks is a key task in the project management. in this process, risk breakdown structure (rbs) approach can be utilized to identify project relevant risks. in the previous classical method, only limited number of attributes is considered in the evaluation that can cause unreliable results. in this paper, an attempt has been made to introduce and involve a relatively comprehensive ...
nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...
asafoetida is the dried latex exuded from the living underground rhizome or tap root of ferula assafoetida. antibacterial characteristic of asafoetida was shown using the circular zone diameter of bacterial growth inhibition by disk-diffusion method on two gram positive and three gram negative bacteria. then, the bacterial genomic dna damage, induced by f. assafoetida latex, was demonstrated us...
Background: Today, the drilling industry is one of the world's most dangerous occupations because of the many accidents it is facing. Therefore, the study and evaluation of the risks of activities and operations in the drilling industry can be helpful in reducing the accident in this industry. Methods: In this research, the safety and health risk assessment of drilling operations was carried ou...
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