نتایج جستجو برای: failure analysis
تعداد نتایج: 3120164 فیلتر نتایج به سال:
Introduction: Study of academic failure can be helpful in identification of students at the risk of academic defeat and consequently leads to the prevention of material and human resource loss. As a result, this study was performed to determine the trends of academic failure and the determinants affecting it in Zanjan University of Medical Sciences. Methods: In this descriptive cross-sectional...
Background and purpose: Influenza A (H1N1), an acute respiratory disorders, is a highly contagious virus and can spread from person to person through sneezing or coughing. In 2009, pandemic influenza A (H1N1) emerged in some regions. This meta-analysis aimed at estimating the co-morbidity of 2009 H1N1 pandemic and other diseases in countries in the WHO Eastern Mediterranean Region. Materials a...
Introduction: Female orgasm is a subjective phenomenon that has been wrongly introduced to people and therapists in the halo of exaggeration and perfectionism made by sexual films. This study was conducted to explore the Iranian women's experience of achievement of or failure to achieve orgasm and its consequences in sexual relationship. Method: This qualitative study was conducted using conten...
In this paper, using two different methods, probability of failure is calculated for three offshore platforms in Persian Gulf. In first method, uncertainties are applied as a magnification factor in calculation of failure probability, whereas in the second method these uncertainties are considered directly for uncertainty parameters. The parameters of wave height hazard curve for eight directio...
مقایسه دو زبان فارسی و فرانسه در سطح آوایی موضوع پژوهش حاضر است . این مقایسه نشان داده است که زبان فرانسه دارای 18 همخوان و 10 واکه دهانی و 3 واکه غنه است . واکه های دهانی با مشخصات پیشین ˆ پسین و بازی ˆ بستگی و واکه های غنه با مشخصات غنه، لبی و پیشین ˆ پسین طبقه بندی شده اند. در زبان فارسی و فرانسه دیفتانگ وجود ندارد، د حالیکه در فرانسه قدیم نه تنها واکه های دوتایی بلکه واکه های سه تایی نیز وج...
nowadays, due to the increasing power of diesel engines, especially heavy duty diesel engines, and increasing gas pressure inside the combustion chamber, the forces acting on the engine bearings have dramatically raised. on the other hand, becaus eof the competition in the market, it is necessary to increase the engine bearing life and reduce its failure as much as possible. the engine bearings...
conclusions: absence of the c allele was significantly associated with failure of response. the presence of c allele was associated with a favorable outcome. afp is a strong baseline predictor of hcv treatment response. a decision tree model is useful for predicting the probability of response to therapy. patients and methods: the study included 263 chronic hcv egyptian patients receiving peg-i...
A recently developed ultra-hard boride-based material, AlMgB14, has been fabricated into a standard cutting tool geometry (TPG-222) and tested using single-point turning of Ti-6Al-4V. The initial testing was conducted to compare this new cutting tool’s performance relative to a WC-Co cutting tool. During the tests the boride-based inserts suffered catastrophic failure for a wide range of cuttin...
In this study, the effect of the tube material on the thermal stress generated in a vertical shell and tube heat exchanger is investigated. Shell and tube heat exchangers are the most common heat exchangers used in industries. One of the most common failures in these exchangers in the industry is the tube failure at the junction of the tube to tubesheet. When the shell side and the tube side fl...
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