Results 51 to 60 of about 1,160,382 (294)

Association of Head-Neck Rotation With History of Pitching-Related Elbow Pain in Youth Baseball Players

Orthopaedic Journal of Sports Medicine
Background: Prevention of pitching-related elbow pain in youth baseball players is important. Overhead pitching involves a whole-body motion, including head-neck rotation.
Masumi Yoshimoto PT, PhD, Masashi Kawabata PT, PhD, Toru Miyata PT, MS, Yosuke Sato PT, Daichi Naoi PT, Mitsuaki Ashihara PT, MS, Nobuyuki Suzuki PT, Chihiro Ikoma PT, Hiroaki Tatsuki PT, Ryota Kuratsubo PT, MS, Hiroyuki Watanabe PT, PhD, Yohei Kusaba MD, Daiki Watanabe MD   +12 more
doaj   +1 more source

Research on rolling instability of typical high-speed aircraft

Kongqi donglixue xuebao
The flight environment and airframe configuration of high-speed aircraft are quite different from those of traditional flight vehicles, and there are many new problems in the study of their dynamic stability. In order to investigate the rolling stability
Rongfei CONG, Zhongliang ZHAO, Youda YE, Shang MA, Qian LI, Chang GAO, Feng WEI   +6 more
doaj   +1 more source

Relationship of Glove Arm Kinematics With Established Pitching Kinematic and Kinetic Variables Among Youth Baseball Pitchers

Orthopaedic Journal of Sports Medicine, 2018
Background: While the kinematics of the pitching arm, trunk, and pelvis have been described and studied, glove arm kinematics remain an understudied portion of the pitching motion. Baseball pitchers seek to achieve maximum ball velocity in a fashion that
Jeff W. Barfield MS, CSCS, Adam W. Anz MD, James R. Andrews MD, Gretchen D. Oliver PhD, FACSM, ATC, CES   +3 more
doaj   +1 more source

3D Measurement of Forearm and Upper Arm during Throwing Motion using Body Mounted Sensor

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2010
The aim of this study is to propose the measurement method of three-dimensional (3D) movement of forearm and upper arm during pitching motion of baseball using inertial sensors without serious consideration of sensor installation.
Hideharu KODA, Koichi SAGAWA, Kouta KUROSHIMA, Toshiaki TSUKAMOTO, Kazutaka URITA, Yasuyuki ISHIBASHI   +5 more
doaj   +1 more source

A study on unsteady fluid-dynamic force characteristics of a pitching wing with leading edge protuberance

Nihon Kikai Gakkai ronbunshu, 2023
We conducted a study on unsteady characteristics of fluid-dynamic force acting on a pitching NACA0012 wing with linear leading edge (Baseline) and with leading edge protuberance (Wave) in low Reynolds number region (Re =4.32×104) for the development of ...
Kazuki DOI, Takahiro YASUDA, Aki NAKATA, Hisato MINAGAWA   +3 more
doaj   +1 more source

Infraspinatus Cross-Sectional Area and Shoulder Range of Motion Change Following Live-Game Baseball Pitching

, 2019
Context: Following a baseball pitching bout, changes can occur to glenohumeral range of motion that could be linked to injury. These effects are in part due to the posterior shoulder’s eccentric muscle activity, which can disrupt muscle contractile ...
Brett S. Pexa, Elizabeth Teel, Eric D. Ryan, Elizabeth E. Hibberd, Terri Jo Rucinski, Joseph B. Myers   +5 more
core   +1 more source

Numerical study of a Flexible Sail Plan submitted to pitching : Hysteresis phenomenon and effect of rig Adjustments [PDF]

, 2014
Yacht sails dynamic fluid structure interaction is simulated in harmonic pitching Aerodynamic forces show hysteresis associated to energy dissipation Dissipated energy increases with pitching frequency and amplitude Hysteresis is cancelled and forces ...
AUGIER, Benoit, BOT, Patrick, DURAND, Mathieu, AUBIN, Nicolas, HAUVILLE, Frederic   +4 more
core   +1 more source

Modal Analysis of Light Propagation, Polarization and Diffraction by Cholesteric Liquid Crystal Layers

Advanced Functional Materials, EarlyView.
The analysis of optical eigenmodes in chiral liquid crystal with perpendicular or tilted helical axis, and their correspondence with the external medium, leads to an intuitive understanding of the angle and wavelength dependency of transmissive and reflective diffraction.
Ke Xu, Pouya Nosratkhah, Le Zhou, Shengzhu Yi, Giorgio Manzoni, Kristiaan Neyts   +5 more
wiley   +1 more source

Multistage, Self‐Sensing Artificial Muscles With Coordination From Liquid Crystal Elastomer‐Graphene Composite Fibers

Advanced Functional Materials, EarlyView.
Inspired by skeletal muscles’ precision and endurance, CoilLCE integrates a self‐sensing liquid crystal elastomer/graphene artificial muscle with an embedded Joule‐heating copper coil, enabling closed‐loop multistage actuation with programmable intermediate states (strain accuracy of 2%), and antagonistic coordination (32% total strain). These features
Ziyun Zhang, Xuelin Wu, Yinding Chi, Qingya Huang, Yaoye Hong, Antonio Proctor Martinez, Jingxian Wu, Bingzhi He, Cynthia Sung, Shu Yang   +9 more
wiley   +1 more source

Experimental and analytical investigation of hypersonic fluid-structure-interactions on a pitching flat plate airfoil

, 2016
Understanding the effects of unsteady flows is a critical area of hypersonic research. This paper presents a comparison of experimental results and analytical tools commonly used for the prediction of fluid structure interactions: Piston theory, Van Dyke’
Jahn, Ingo, Buttsworth, David, Yamada, Kenji   +2 more
core   +1 more source