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Youngkuk Yoon and Seung Jin Song
Cavitation instabilities can induce axial and circumferential vibrations, as well as noise in turbopump inducers. Therefore, the purpose of the present study is to investigate the mechanism of cavitation instability. The flow field near the two-bladed in...
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Hong Je-Gal, Seung-Jin Lee, Jeong-Hyun Yoon, Hyun-Suk Lee, Jung-Hee Yang and Sewon Kim
Ensuring operational reliability in machinery requires accurate fault detection. While time-domain vibration pulsation signals are intuitive for pattern recognition and feature extraction, downsampling can reduce analytical complexity, but may result in ...
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Milon Chowdhury, Mohammod Ali, Eliezel Habineza, Md Nasim Reza, Md Shaha Nur Kabir, Seung-Jin Lim, Il-Su Choi and Sun-Ok Chung
The rollover tendency of upland farm machinery needs to be carefully considered because upland crop fields are typically irregular, and accidents frequently result in injuries and even death to the operators. In this study, the rollover characteristics o...
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Milon Chowdhury, Md Nasim Reza, Mohammod Ali, Md Shaha Nur Kabir, Shafik Kiraga, Seung-Jin Lim, Il-Su Choi and Sun-Ok Chung
Vibration assessment of upland crop machinery under development is essential because high vibrational exposures affect machine efficiency, service life of components, degradation of the working environment, and cause health risks to the operator. It is i...
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Zelika Mega Ramadhania, Dong Uk Yang, Moelyono Moektiwardojo, Yaxi Han, Jin Kyu Park, Esrat Jahan Rupa, Deok Chun Yang, Seung Jin Lee and Se Chan Kang
Functional foods to prevent aging, particularly skin aging, have grown in popularity as society ages and science uncovers the pathological mechanisms of aging. In this study, we used processed ginseng, one of the famous functional foods, along with ferme...
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Muhammad Azam, Seung Jin Maeng, Hyung San Kim, Seung Wook Lee and Jae Eun Lee
High spatial and temporal variation in precipitation in South Korea leads to an increase in the frequency and duration of drought. In this study, the spatial characteristics of temporal trends for precipitation and drought severity time series were analy...
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Muhammad Azam, Hyung Keun Park, Seung Jin Maeng and Hyung San Kim
Topographic and hydro-climatic features of South Korea are highly heterogeneous and able to influence the drought phenomena in the region. The complex topographical and hydro-climatic features of South Korea need a statistically accurate method to find h...
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Seung Jin Maeng, Muhammad Azam, Hyung San Kim and Ju Ha Hwang
Since the climatic features of South Korea are highly complex and time variable, spatio-temporal-based drought frequency analysis is a prerequisite for drought risk management. The spatial extent of drought risk analysis in a bivariate framework has scar...
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Seung Jin Chang and Seung-Il Moon
The estimation of instantaneous frequency (IF) method is introduced to compensate for the group velocity of electromagnetic wave in dispersive medium. The location of the reflected signal can be obtained by using the time-frequency cross correlation (TFC...
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Seung Jin BAEK
Pág. 224 - 237
JEL. D63, L15, O10.
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