نتایج جستجو برای: dynamic and static efficiency

تعداد نتایج: 16940789  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...

Journal: :journal of basic research in medical sciences 0
himan ebrahimi department of sport pathology and corrective exercise, faculty of physical education and sport sciences, university of allameh tabatabai, tehran, iran mehdi shahrokhi department of sport pathology and corrective exercise, faculty of physical education and sport sciences, university of allameh tabatabai, tehran, iran zahra toktam barmar department of physical education and sports science, islamic azad university of mashhad, mashhad, iran ramin balouchi department of physical education and sports science, islamic azad university of mashhad, mashhad, iran

introduction: sensory-motor control and in general gaining balance will be impaired after an ankle injury and in fatigue situations. the aim of this research was to study the effect of exercise-based fatigue on static and dynamic balance in mountaineering athletes who were successful in returning to a suitable level of physical activity after an ankle sprain injury. materials and methods: 25 ac...

Alirezaei, Fatemeh, Sadeghi, Heydar,

Objectives: Poor balance is one of risk factors of falling, a cause of injury and even death in elderly. The aim of this study was to evaluate the effect of a water exercise program on static and dynamic balance in elder women. Methods & Materials: Thirty participants aged 55-70 years completed an exercise program (60 min, 3 days and 6 weeks), in 2 groups, exercise and control, voluntarily. ...

آذغانی, محمود رضا, پرنیانپور, محمد, کاظم نژاد, انوشیروان, کهریزی, صدیقه, ارشاد, ندا ,

  Background : Epidemiological studies showed that low back pain after load-carrying and holding is the most common disorder in industrialized countries and cause of dysfunction and economic problems. Variable dynamic loads impose varying moments about the intervertebral joints and cause a threat to balance. The aim of the present study was to compare the postural stability while holding dynami...

2008
Aditi Bhattacharyya

The purpose of this paper is to construct a dynamic stochastic production frontier incorporating the sluggish adjustment of inputs, to measure the speed of adjustment of output, and to compare the technical efficiency estimates from this dynamic model to those from a static model. Assuming that the adjustment speed of all inputs is similar for every production unit, a linear partial adjustment ...

Journal: :علوم زیستی ورزشی 0
علیرضا رمضانی استادیار دانشگاه تربیت دبیر شهید رجایی، تهران، ایران سارا زارع کاریزک دانشجوی دکتری فیزیولوژی ورزشی دانشگاه تربیت دبیر شهید رجایی، تهران، ایران میثم شعبانی نیا دانشجوی دکتری فیزیولوژی ورزشی دانشگاه تربیت دبیر شهید رجایی، مربی دانشگاه آزاد اسلامی شوشتر، شوشتر، ایران

optimization of training results and improvement of response requires selecting appropriate stimulus and are goals of any training program. it seems that ischemic-reperfusion preconditioning (irpc) can be a suitable stimulus to increase submaximal contractile responses. therefore, this study aimed at investigating the effect of ischemic-reperfusion preconditioning and remote preconditioning (ir...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی 1391

in this study, the effects of oleothermal modification on physical and mechanical peroperties of fir wood (abeis sp.) blocks were examined. at first, some blocks of fir wood with 5 × 20 × 120 cm dimensions were prepared. the blocks were treated in soybean oil. the effects of 3 factors such as treatments temperature (180and 200 °c), holding time (12 and 15 h) and initial moisture content of wood...

Introduction and Aim: This study aimed to determine the effect and persistence of neuromuscular correction programs on landing position, static and dynamic balance in athletes with Dynamic Knee Valgus defects. Methods: The statistical population of this quasi-experimental study included teenagers athletes in soccer with dynamic knee valgus deformity who were purposefully selected and randomly ...

M. Divandari, M. Mehrabian,

This paper investigates the difference between thickness of zinc-based alloys oxide films in dynamic condition using the oxide-metal-oxide (OMO) sandwich method and static condition by theoretical calculations. In dynamic condition, the thickness of the oxide film in the OMO sandwich sample was characterized by scanning electron microscopy (SEM). In the static condition, the thickness and type ...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم انسانی 1393

in this research the focus of the researcher is on the influence of american myths that have long been held and offered by the american culture and ideologies. sam shepard is conceived to be one of the greatest playwrights of the contemporary american theater. in his works he depicts broken characters who are struggling to keep up with the national expectations but are ceaselessly borne back to...

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