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제목 Tennis Kinematics and Poincare Conjecture (Rotational Electromagnetic Wave Kinematics)
학술지명 응용미약에너지학회지
교신저자 Hungkuk Oh
공동저자 Yejoon Kim
논문구분 논문
논문번호 제13권, 제1호, pp. 43-47
게재년월 2015년 06월,
작성자 관리자 첨부파일 파일 다운로드
조회수 0 등록일시 2016-01-04 16:33
Because tennis ball has spherical shape, tennis kinematics must be Poincar? conjecture in order to have best contact with the ball.
 They are open kinematics and close kinematics. The open one has expansive sphere while the close one has contractive sphere.
 They are composed of two spherical circles or two shuttle lines.
 Timing function has trigonometric shape.
 It has slow part and quick one. In a real play, one must adjust the timing with the ball speed.
 Volley and service have the same principles as in rally.
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