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Dong-Hyuk Choi, Byoung-Il Youn, Kyeong-Ho Han, Dae-Hyeon Kwon and Soo-Jeong Lee
To investigate the age and growth characteristics of shotted halibut, Eopsetta grigorjewi, in the West Sea of Korea, the samples were collected using gill nets throughout 2019. A total of 861 specimens (693 females and 168 males) were analyzed. The BW-TL...
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Chang-Min Lee, Byung-Gun Jung and Jae-Hyuk Choi
The International Maritime Organization strives to improve the atmospheric environment in oceans and ports by regulating ship emissions of air pollutants and promoting energy efficiency. This study deals with the prediction of eco-friendly combustion in ...
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Jae-Hyuk Lee, Jae-Hoon Ryu, Eun-Sung Lee, Hyung-Seok Han and Jeong-Yeol Choi
A noncircular engine cross-section could provide great flexibility in the integration of propulsion into the airframe. In this work, a tri-arc RDE was constructed and tested as an example of noncircular cross-sectioned RDE. The operational characteristic...
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Jun-Soo Kim, Won-Ju Lee, Van Chien Pham and Jae-Hyuk Choi
A numerical study was carried out to investigate the effects of injector spray angle (SA) and injection position (IP) on the combustion and emission characteristics of a two-stroke ME-GI marine engine at full load. Three-dimensional (3D) simulations of t...
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Bo Sung Kim, O-il Kwon, Yong Hyuk Choi and Joon Kyu Lee
Estimating the performance of foundations on rock mass is essential in designing buildings. Stability assessment of weathered rocks under foundation load is a complicated task if there is an internal opening within the foundation. This study applies fini...
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Han-Sol Choi, Dong-Yeon Kim, Jeong-Hoon Park, Jae Hyuk Lim and Tae Seong Jang
In this study, a passive truss-link mechanism applicable to large-scale deployable structures was designed to achieve successful deployment in space. First, we simplified the selected truss-link mechanisms to the two-dimensional geometry and calculated t...
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Min-Ho Park, Chang-Min Lee, Antony John Nyongesa, Hee-Joo Jang, Jae-Hyuk Choi, Jae-Jung Hur and Won-Ju Lee
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Byoung-Il Youn, Dong-Hyuk Choi, Seung-Hwan Lee, Kyeong-Ho Han, Seung-Jong Lee, Dae-Hyeon Kwon and Maeng-Jin Kim
This study aimed to investigate the gonadal development process and size at maturity of the ocellate spot skate Okamejei kenojei (Müller and Henle, 1841). In total, 1234 specimens were collected from the center of the Korean West Sea between January 2019...
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Van Chien Pham, Hanseok Kim, Jae-Hyuk Choi, Antony J. Nyongesa, Jongsu Kim, Hyeonmin Jeon and Won-Ju Lee
Recent developments in power electronics, energy storage systems, and renewable energy; increased market demands for more efficient and cleaner electric power to meet stricter environmental regulations; and development in gigawatt (GW)-class DC (direct c...
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Woo-Seok Kwon, Quang Dao Vuong, Jae-Hyuk Choi, Jae-ung Lee, Ji-woong Lee, Sung Hwan Yoon, Antony John Nyongesa, Min-Ho Park, Seung-Kwon Yang and Won-Ju Lee
This research presents the transient torsional vibration due to cutting action of a propeller rope cutter. Therefore, a method to determine the safety diameter of connecting bolts was described regarding the fatigue strength of the propulsion system. The...
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