نتایج جستجو برای: front
تعداد نتایج: 67915 فیلتر نتایج به سال:
We develop a numerical solver for radiative transfer problems based on the weighted essentially nonoscillatory (WENO) scheme modified with anti-diffusive flux corrections, in order to solve the temperature and ionization profiles around a point source of photons in the reionization epoch. Algorithms for such simulation must be able to handle the following two features: 1. the sharp profiles of ...
The purpose of this study was to investigate the relationship between sprint performance of front-crawl swimming and muscle fascicle length in 23 male young swimmers. The sample was divided into two groups by 25-m sprint front-crawl swimming performance: 14.6-15.7 s (S1, n=11) and 15.8-17 s (S2, n=12). Muscle thickness and pennation angle and fascicle length of the Biceps Brachii (only muscle t...
asthma, which is mainly distinguished by airway inflammation and bronchial hyper responsiveness, is known as one of the most common chronic diseases worldwide. it also is the most frequent chronic respiratory disorder amongst all age groups. on one side of the asthma story, there are massive investment of time, effort and money, a large number of pharmaceutical and academic research studies, he...
This paper focuses on the optimization of initiating dimensions of groove bearing in association with de- sired design of vehicle’s front structure which is made up of low carbon steels in the case of frontal collision. Axial bearing analysis is done numerically using nonlinear finite element code LS-DYNA. In this analysis, changes of two main parameters including measure of energy absorp...
Youth swimming performance may be influenced by anthropometric, physiology, and biomechanical factors. The purpose of this study was to analyze the relationships between 50-m front-crawl swimming performance and relevant anthropometrical (body height, body mass, body mass index, arm span, shoulders width, thigh, leg and upper arm lengths), muscle architectural (muscle thickness, pennation ...
Objective For optimal performance of swimmers, it is necessary to determine a level for the functional interaction of upper and lower limbs. This level, created by more than 20 pairs of muscles, is the core of the body. The aim of this study was to investigate the effects of six weeks of core stability exercise on the stroke index and front crawl record of male swimmers. Methods In this quasi-...
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