نتایج جستجو برای: Failure Pressure
تعداد نتایج: 749874 فیلتر نتایج به سال:
river bank erosion can result in considerable riparian land loss and the delivery of large volumes of sediment to reaches downstream. consequently, the ability to predict the stability and failure geometry of eroding river banks is an important prerequisite for es-timating the rate of bank erosion and sediment yield associated with bank erosion. in this paper a new model capable of analyzing th...
composite pressure vessel cng made of epoxy – carbon material with nonmetal liner is 60% lighter than aluminum vessel under the same conditions. one of the important parameters in the pressure vessels design is their resistance against impact and prevention of explosion. in this paper, the effects of low velocity impact on composite pressure vessel are investigated using fe analysis. the vessel...
Background: Blood pressure decreases during sleep and is markedly increased in the morning in healthy individuals. Lack of nocturnal blood pressure fall (non-dipping) has been associated with cardiovascular morbidity, mortality and other organ damage. However, their importance in chronic renal failure is unclear. This study aimed to investigate relationship between circadian rhythm of blood pre...
water is the most essential component for sustaining lives of humans and other living creatures. supplying potable water with adequate residual pressure is a fundamental responsibility of city administration, which they do during normal conditions. but sometimes, abnormal conditions are formed resulting pressure deficient conditions during the daily operations of water distribution networks. th...
background: hypertension is more common in adults with type 1 diabetes mellitus (t1dm) than the general population. the aim of this study was to detect the pre-hypertensive stage in children with t1d and to evaluate its correlation with diabetic nephropathy compared to non-diabetic children. methods: this was a prospective cross-sectional study in an out-patient clinic of a university hospital....
Water is the most essential component for sustaining lives of humans and other living creatures. Supplying potable water with adequate residual pressure is a fundamental responsibility of city administration, which they do during normal conditions. But sometimes, abnormal conditions are formed resulting pressure deficient conditions during the daily operations of water distribution networks. Th...
Background: Heart failure is associated with structural and functional changes of the heart and physical activity is a likely intervention to improve it. This study aimed at investigating the effect of concurrent aerobic-resistance exercise training on NT-proBNP levels, blood pressure and body composition in patients with chronic heart failure. Materials and Methods: In this clinical trial stud...
background: recently, stem cells have been considered for the treatment of heart diseases, but no marked improvement has been recorded. this is the first study to examine the functional and histological effects of the transplantation of human amniotic mesenchymal stromal cells (hamscs) in rats with heart failure (hf). methods: this study was conducted in the years 2014 and 2015. 35 male wistar ...
the renin-angiotensin-aldosterone system (raas) plays pivotal roles in the pathogenesis of chronic kidney disease (ckd) progression and its increased complications such as hypertension (ht) and cardiovascular diseases (cvd). previous studies suggested that aliskiren a direct renin inhibitor, blocks raas and may be effective for the management of ckd and its complications. this review focuses on...
Determination of the borehole and fracture initiation positions is the main aim of a borehole stability analysis. A wellbore trajectory optimization with the help of the mud pressure may be unreasonable since the mud pressure can only reflect the degree of difficulty for the initial damage to occur at the wellbore rather than the extent of the wellbore damage. In this work, we investigate...
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