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Yongchan Kim, Junyeop Nam, Tae-Seong Roh and Hyoung Jin Lee
Base drag has a significant effect on the overall drag of a projectile in a supersonic flow. Herein, the base drag and flow characteristics of cold and hot gas flow in a supersonic flow are analyzed via numerical simulations. The hot gas flow is simulate...
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Hye In Kim, Tae-Seong Roh, Hwanil Huh and Hyoung Jin Lee
With the growth of the satellite industry, the demand for a propulsion system for small launch vehicles and spacecraft has increased. Small liquid rocket engines may require Ultra-Low specific speed centrifugal pumps due to the low required thrust and vo...
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Jae-Il Jeong, Jong-Hyoung Kim, Si-Geun Choi, Young Tae Cho, Chan-Kyu Kim and Ho Lee
The bearing is a machine element that plays an important role in rotating the shaft of a machine while supporting its weight and load. Numerous bearings have been developed to improve durability and life, depending on the functions and operating conditio...
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Chil Hyoung Lee, Go Bong Choi, Eun Mi Kim, Jongho Lee, Jaegeun Lee, Hi Gyu Moon, Myung Jong Kim, Yoong Ahm Kim and Tae Hoon Seo
The demand for high-performance two-dimensional gas barrier materials is increasing owing to their potential for application in optoelectronic devices. These materials can help the devices maintain their properties over a long period. Therefore, in this ...
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Young-Gyu Kim and Tae-Hyoung Park
The contribution of this paper is to propose a dual-stream convolutional neural network (CNN) using two solder regions for inspections of surface mount technology (SMT) assembly defects. We extract two solder regions from a printed circuit board (PCB) im...
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Hyoung Tae Kim, Se-Myong Chang and Young Woo Son
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