Search Results - "HONG, Sungchan"

Aerodynamics of the newly approved football for the English Premier League 2020–21 season by Asai, Takeshi, Hong, Sungchan

“…Footballs are typically constructed with 32 panels. Recently, the number of panels has been successively reduced to 14, 8, and 6 panels, and official balls…”
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Droplet evaporation on porous fabric materials by Gonçalves, Marta, Kim, Jin Young, Kim, Yeseul, Rubab, Najaf, Jung, Narina, Asai, Takeshi, Hong, Sungchan, Weon, Byung Mook

“…Droplet evaporation on porous materials is a complex dynamic that occurs with spontaneous liquid imbibition through pores by capillary action. Here, we explore…”
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Peak risk of SARS-CoV-2 infection within 5 s of face-to-face encounters: an observational/retrospective study by Asai, Takeshi, Kurosaki, Erina, Kimachi, Kaoru, Nakayama, Masao, Koido, Masaaki, Hong, Sungchan

“…The link between aerosol dynamics and viral exposure risk is not fully understood, particularly during movement and face-to-face interactions. To investigate…”
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The Aerodynamics of New Design Soccer Balls Using a Three-Dimensional Printer by Hong, Sungchan, Goff, John Eric, Asai, Takeshi

“…Eight balls were manufactured with a 3D printer to resemble various types of 32-panel soccer balls. One ball was completely smooth, whereas the other seven…”
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Aerodynamic Differences between New and Used Soccer Balls by Hong, Sungchan, Asai, Takeshi

“…The surface structure of soccer balls, such as the number and shapes of the ball panels, has recently changed, and research on the aerodynamics and flight…”
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Effect of panel shape of soccer ball on its flight characteristics by Hong, Sungchan, Asai, Takeshi

“…Soccer balls are typically constructed from 32 pentagonal and hexagonal panels. Recently, however, newer balls named Cafusa, Teamgeist 2 and Jabulani were…”
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Effect of Surface Groove Structure on the Aerodynamics of Soccer Balls by Hong, Sungchan, Asai, Takeshi

“…Soccer balls have undergone dramatic changes in their surface structure that can affect their aerodynamics. The properties of the soccer ball surface such as…”
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Flow Visualization of Spinning and Nonspinning Soccer Balls Using Computational Fluid Dynamics by Asai, Takeshi, Nakanishi, Yasumi, Akiyama, Nakaba, Hong, Sungchan

“…Various studies have been conducted on the aerodynamic characteristics of nonspinning and spinning soccer balls. However, the vortex structures in the wake of…”
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Consideration on size, velocity and path of droplets emitted during running by KUROKI, Takako, MOMMA, Reiko, HOSHI, Daisuke, HONG, Sungchan, HIZAWA, Nobuyuki, MUKAI, Naoki, WATANABE, Koichi, OKAMOTO, Yoshikazu

“…BACKGROUND: People began to wear face masks during physical activities due to spread of COVID-19. There are no previous studies about the need for wearing…”
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Aerodynamic Characteristics of New Volleyball for the 2020 Tokyo Olympics by Hong, Sungchan, Ozaki, Hiroki, Watanabe, Keita, Asai, Takeshi

“…The pattern of a modern volleyball is greatly different from that of a conventional volleyball, with several changes being made to the shape and design of the…”
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Aerodynamics of Cycling Skinsuits Focused on the Surface Shape of the Arms by Hong, Sungchan, Asai, Takeshi

“…In cycling, air resistance corresponds to 90% of the resistance on the bicycle and cyclist and 70% of this is applied to the body of the cyclist. Despite…”
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Aerodynamic effects of dimples on soccer ball surfaces by Hong, Sungchan, Asai, Takeshi

“…Recently, the shape and design of the panel on the official ball used in the FIFA World Cup was considerably different from that of a conventional soccer ball…”
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Surface Patterns for Drag Modification in Volleyballs by Hong, Sungchan, Asai, Takeshi, Weon, Byung Mook

“…Surface patterns on objects are important in aerodynamics. We show how surface patterns on volleyballs modify their aerodynamic performances. Conventional…”
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Effect of seam characteristics on critical Reynolds number in footballs by NAITO, Kiyoshi, HONG, Sungchan, KOIDO, Masaaki, NAKAYAMA, Masao, SAKAMOTO, Keiko, ASAI, Takeshi

“…In recent years, the design of footballs, including the number and shape of the panels forming the surface of footballs, has undergone a significant change…”
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The Impact of Surface Structure Changes on the Aerodynamic Characteristics of Modern Soccer Balls by Hong, Sungchan

“…PURPOSE This study comprehensively examined the aerodynamic and flight characteristics of modern soccer balls, focusing on their design evolution and…”
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Influence of Surface Properties on Soccer Ball Trajectories by John Eric Goff, Sungchan Hong, Takeshi Asai

“…In this paper, we summarize our recent research work on soccer balls. Employing wind tunnels and analyses of simulated trajectories, we have gained an…”
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Visualization of air flow around soccer ball using a particle image velocimetry by Hong, Sungchan, Asai, Takeshi, Seo, Kazuya

“…A traditional soccer ball is constructed using 32 pentagonal and hexagonal panels. In recent years, however, the likes of the Teamgeist and Jabulani balls,…”
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Comparison of Biomechanical Factors among Straight, Curve and Knuckle Kicking Motions in Soccer by Kaoru Kimachi, Richong Liu, Masaaki Koido, Sungchan Hong, Shuji Shimonagata, Masao Nakayama, Takeshi Asai

“…The rotation of a soccer ball is affected by several factors, such as impact point and foot posture, which are generated by joint torque in the lower limb…”
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Measurements of the Flight Trajectory of a Spinning Soccer Ball and the Magnus Force Acting on It by Takeshi Asai, Kaoru Kimachi, Richong Liu, Masaaki Koido, Masao Nakayama, John Eric Goff, Sungchan Hong

“…The trajectory of a soccer ball, kicked with a spin to curve it into the goal, is strongly influenced by aerodynamic factors such as the Magnus force. Several…”
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Impact Points and Their Effect on Trajectory in Soccer by Kaoru Kimachi, Sungchan Hong, Shuji Shimonagata, Takeshi Asai

“…The kick skill and its analysis are important in Soccer. To detect impact point by using virtual impact model is aim of this study. The virtual impact model…”
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