• Title/Summary/Keyword: Throwing

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Throwing Mechanics (투구 동작의 역학)

  • Moon Young-Lae;Lee Kyung-Il;Lee Kwang-Chul
    • Journal of Korean Orthopaedic Sports Medicine
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    • v.2 no.2
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    • pp.113-118
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    • 2003
  • Throwing motion divided by 6 phases such as wind-up, (early and late) cocking, acceleration, deceleration, follow-through. Overuse injuries in baseball result most often from pitching. Poor mechanics is the leading cause of arm injuries. The purpose of this article is to analyze the each joint motion and evaluate the biomechanics and pathomechanics during pitching.

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Effects of Purposeful Exercise Training Program on Symmetrical Posture in Persons with Hemiplegia (목적있는 운동훈련이 편마비 환자의 좌우 대칭적 서기자세에 미치는 영향)

  • Kim, Myoung-Jin
    • Physical Therapy Korea
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    • v.4 no.1
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    • pp.63-69
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    • 1997
  • Asymmetrical posture during static stance has been identified as a common problem in persons with hemiplegia. This study examined the effect of a purposeful exercise training program on symmetrical weight bearing in three adult persons with hemiplegia. Multiple baseline design was used. The intervention program, including ball throwing and catching, rolling ball catching and throwing, and Swiss ball pulling and stopping was introduced for 15 minutes each day during each intervention phase. Quantitative measurement of the weight distribution was taken with the Limloader. Visual inspection and mean of data revealed a significant improvement in symmetrical weight distribution. This result suggests that a purposeful exercise training program can be effective in helping persons with hemiplegia achieve symmetric stances.

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The Structural Reinforcement Design of Firefighter Assistance Robots for Improving the Impact Resistance (소방관 보조로봇 플랫폼의 내충격성능 향상을 위한 구조 보강 설계)

  • Shin, Dong-Hwan;Kim, Yoon-Gu;An, Jinung
    • IEMEK Journal of Embedded Systems and Applications
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    • v.6 no.5
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    • pp.273-280
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    • 2011
  • In this paper, we describe the structural reinforcement approach of the throwing-type firefighter assistance robot which can be thrown into a fire site to monitor inside the place and search trapped people while ensuring a firefighter's safety. The reinforcement design is focused on high strength with low weight for the robot. The in-depth structural analysis of the platform is carried out to track down the weakest part, especially with the 1.8m height of drop test. The analysis is verified by comparing with the 1.8m height of the drop test of the throwing-type firefighter assistance robot. The optimal approach for improving the strength of the weakest part aims at topological equivalent and equivalently stress distributed shape.