نتایج جستجو برای: service life
تعداد نتایج: 1051342 فیلتر نتایج به سال:
a professional is someone whose work involves performing a certain function with some degree of expertise. but a narrower definition limits the term to apply to people such as teachers and doctors, whose expertise involves not only skill and knowledge but also the exercise of highly sophisticated judgment, and whose accreditation necessitates extensive study, often university-based as well as p...
abstract background and aim: visual impairment affects people's quality of life. since the effect of rehabilitation services is measured by improving in quality of life, this study was performed to evaluate the effect of rehabilitation services on quality of life in the blind. materials and methods: 121 blind and low vision people who covered by zahedan welfare organization were studied by...
Background and aims: For ensuring about proper performance of air-purifying respirators in providing protection against workplace contaminants, it is necessary to change the respirator cartridges before the end of their service life. The aim of this study was determination of service life of organic vapor cartridges using a simple and practical method in a spray painting booth of a car manufa...
deterioration of concrete structures in the gulf region is a serious problem. penetration of chloride ion into concrete is responsible for such early deterioration. determination of chloride diffusion coefficient is an effective way to predict the service life of concrete structures. in order to investigate the performance of concrete mixtures in such environments, ordinary and silica fume conc...
Background and aims In the absence of End of Service Life Indicator (ESLI), a cartridge change schedule should be established for ensuring that cartridges are changed before their end of service life. The aim of this study was determining the efficiency of respirator change schedule and presenting a suitable schedule for changing the cartridges before their end of service life in a petrochem...
در کشور ما از سالها پیش انواع بیمه های زندگی ارائه می شد لکن استقبال مردم از این بیمه ها بسیار پایین بود.در چند سال اخیر طرح جدیدی از بیمه های زندگی با الگو برداری از بیمه نامه ای به نام universal life insurance که شرکتهای بیمه در دنیا به خصوص کشورهای غربی عرضه می کنند،ارائه گردیده است. با ارائه این بیمه نامه درایران،فروش آن در سالهای اخیر رشد قابل توجهی داشته است لکن هنوز میزان استقبال ازاین ب...
Objective: This study has compared the quality of life of head-of-household women supported by Welfare Organization those who had service jobs in Tehran, 1386 (2007). Method: It was a cross-sectional study. One-hundred and twenty head-ofhousehold women that were supported by Welfare Organization and their counterparts with service jobs were randomly selected. To collect data, a demographi...
in the current engineering practices, buildings are commonly designed for an effective lifetime of 50 years. this lifetime can increase the cost of buildings with short lifetimes and can reduce the safety level of buildings with large lifetimes. in this paper, a “service-life factor” has been defined. applying this factor into the nominal values of live, earthquake, wind, and snow loads, the ef...
Objective: This study has compared the quality of life of head-of-household women supported by Welfare Organization those who had service jobs in Tehran, 1386 (2007). Method: It was a cross-sectional study. One-hundred and twenty head-ofhousehold women that were supported by Welfare Organization and their counterparts with service jobs were randomly selected. To collect data, a demographi...
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