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Akademický článek

Measurement of aerodynamic force and moment acting on a javelin using a magnetic suspension and balance system

Autor: Kazuya Seo, Hiroyuki Okuizumi, Yasufumi Konishi, Takuto Kobayashi, Hiroaki Hasegawa, Shigeru Obayashi

Publikováno v: Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023)

Abstract The rules governing the dimensions of the Javelin were substantially changed in 1986. It was considered that this new design guaranteed there was zero pitching moment at 0° angle of attack and that the pitching moment decreased (became nega

Externí odkaz: https://doaj.org/article/aaa47e2c362b4a62bebdf9b766a61037

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Akademický článek

Range of motion patterning in trunk and upper and lower extremities of high school baseball pitchers

Autor: Machiko Hiramoto, Tomoyuki Matsui, Ruo Hashimoto, Yoshikazu Azuma, Kazuya Seo, Tetsuya Miyazaki, Yuya Watanabe, Noriyuki Kida, Toru Morihara

Publikováno v: Journal of Physical Fitness and Sports Medicine, Vol 12, Iss 1, Pp 17-25 (2023)

Evaluating range of motion (ROM) using several joints is essential for rehabilitating throwing injuries. We used multivariate analysis to elucidate the ROM patterns in baseball pitchers. This cross-sectional study measured the variable ROM in the upp

Externí odkaz: https://doaj.org/article/26a4f4f60ae847cfa64133c75f1ff603

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Akademický článek

Effect of surface design on drag properties of soccer balls

Autor: Kaito TADA, Masaki HIRATSUKA, Shinichiro ITO, Kazuya SEO

Publikováno v: Nihon Kikai Gakkai ronbunshu, Vol 89, Iss 924, Pp 23-00045-23-00045 (2023)

The paper describes the critical Reynolds number of soccer balls as a function of the total groove volume on the ball surface. In this study, the aerodynamic drag and separation point of 6 soccer balls with different panel orientations were measured

Externí odkaz: https://doaj.org/article/70060d9a152d48949d313b4776c11c4b

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Akademický článek

Preface

Autor: Motomu Nakashima, Kazuya Seo

Publikováno v: Journal of Biomechanical Science and Engineering, Vol 15, Iss 1, Pp 20preface1-20preface1 (2020)

Externí odkaz: https://doaj.org/article/818c2e6a592544e3ac4b7864a3f4e0eb

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Akademický článek

Measurement of the Aerodynamic Forces Acting on a Non-Spinning Javelin Using an MSBS

Autor: Takuto Kobayashi, Kazuya Seo, Shoya Kaneda, Kasumi Sasaki, Kento Shinji, Shogo Oyama, Hiroyuki Okuizumi, Yasufumi Konishi, Hiroaki Hasegawa, Shigeru Obayashi

Publikováno v: Proceedings, Vol 49, Iss 1, p 144 (2020)

Using the world’s largest magnetic suspension and balance system (MSBS) and a low-turbulence wind tunnel, we successfully measured the aerodynamic forces acting on a non-spinning women’s javelin. It was found that the drag and the lift increased

Externí odkaz: https://doaj.org/article/10a4bf19ef9a438ab39625d157568188

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Akademický článek

Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric

Autor: Yuki Kataoka, Hiroaki Hasegawa, Masahide Murakami, Kazuya Seo, Shigeru Obayashi

Publikováno v: Proceedings, Vol 49, Iss 1, p 109 (2020)

The purpose of this study was to investigate the effect of the air permeability of ski jumping suit fabric on aerodynamic characteristics. In the study, four types of fabric with different air permeabilities were installed onto a fabric-clothed ellip

Externí odkaz: https://doaj.org/article/47245455c84442cf85519db89b296e53

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Akademický článek

The Influence of the Phase Difference between the Crank Angle of the Pilot and that of the Stoker on the Drag Acting on a Tandem Bike

Autor: Kazuya Seo, Satoshi Eda

Publikováno v: Proceedings, Vol 2, Iss 6, p 209 (2018)

Two wind tunnel experiments were carried out to investigate the drag acting on a tandem bike. One experiment involved measurement of the drag acting on two full-scale human models on a tandem. These two human models can pedal the tandem. In the other

Externí odkaz: https://doaj.org/article/2de88ff28de94f05848f07179dd66582

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