نتایج جستجو برای: can cause risks.

تعداد نتایج: 3087642  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

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, ...

Journal: :گوارش 0
elnaz saeedi mohsen nasiri toosi masoud salehi saeede khosravi bizhaem jamileh abolghasemi

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...

Journal: :journal of biostatistics and epidemiology 0
maryam nazemipour department of epidemiology and biostatistics, school of public health, international campus, tehran university of medical sciences, tehran, iran abdol-mohammad kajbafzadeh pediatric urology research center, department of pediatric urology, children’s hospital medical center, tehran university of medical sciences, tehran, iran kazem mohammad department of epidemiology and biostatistics, school of public health, tehran university of medical sciences, tehran, iran abbas rahimi foroushani department of epidemiology and biostatistics, school of public health, tehran university of medical sciences, tehran, iran maryam seyedtabib department of epidemiology and biostatistics, school of public health, hamadan university of medical sciences, hamadan, iran ali nazemipour department of computer engineering, sharif university of technology, tehran, iran

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...

2010
Michael Knowles

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...

Journal: :مدیریت صنعتی 0
احمد صیادی استادیار دانشکده فنی و مهندسی، دانشگاه تربیت مدرس، تهران، ایران محمد حیاتی داشجوی کارشناسی ارشد مهندسی معدن، دانشکده فنی و مهندسی، دانشگاه تربیت مدرس، تهران، ایران مسعود منجزی دانشیار دانشکده فنی و مهندسی، دانشگاه تربیت مدرس، تهران، ایران

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 ...

پایان نامه :0 1392

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...

Journal: :journal of cell and molecular research 0
sasan mohsenzadeh kolsoum abdolahi hassan mohabatkar

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...

Behvandi, Abozar, Dashti, Soolmaz, Varshosaz, Katayoon,

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...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید