نتایج جستجو برای: speed of sound

تعداد نتایج: 21182401  

Journal: :رشد و یادگیری حرکتی - ورزشی 0
فاطمه رضایی کارشناس ارشد دانشگاه تهران مهدی شهبازی استادیار دانشگاه تهران فضل الله باقرزاده دانشیار دانشگاه تهران

skillful performance in soccer requires not only sound techniques but also quickand accurate decision making. these decisions are usually made in variousintensities of practice and performance. the main aim of this study was toinvestigate the effect of different levels of arousal and training intensity on decisionmaking (speed and accuracy) of expert female soccer players. for this purpose, 16e...

Journal: :Journal of Chemical & Engineering Data 2020

Conventional fusion welding of aluminum alloys results in coarse-grained structure, inevitable defects, and significant softening in the welding region. Friction stir welding with bobbin tool is a technique of friction stir welding method that has a great potential for developing applications of friction stir welding method in marine, aerospace, and automotive industries due to having an extra ...

Conventional fusion welding of aluminum alloys results in coarse-grained structure, inevitable defects, and significant softening in the welding region. Friction stir welding with bobbin tool is a technique of friction stir welding method that has a great potential for developing applications of friction stir welding method in marine, aerospace, and automotive industries due to having an extra ...

Ahmad Reza Sabet Hamid Montazerolghaem,

Recently friction stir welding for manufacturing of welded tubes has been developed. Friction stir welding is a continuous solid state welding process in which a non-consumable rotating tool using severe plastic deformation Can join materials can be join materials. Commonly, a portion of a specially shaped rotating tool is plunged between metalsjoint cross section and adjacent faces of the join...

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