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Studies on the Iridoid Glycoside and GABA in the Rehmannia glutinosa Cultivars Root
Sang Hoon Lee(이상훈),Jeong Su Yoon(윤정수),Jae Kwang Kim(김재광),Chun Geon Park(박춘근),Mei Lan Jin(김미란),Mok Hur(허목),Seong Cheol Koo(구성철),Woo Moon Lee(이우문),Jae Ki Chang(장재기),Yeon Bok Kim(김연복) 한국약용작물학회 2017 한국약용작물학회 학술대회논문집 Vol.2017 No.2
Aucubin, Catalpol, and GABA Content in Different Organ of Rehmannia glutinosa Cultivars
Sang Hoon Lee(이상훈),Jeong Su Yoon(윤정수),Jae Kwang Kim(김재광),Chun Geon Park(박춘근),Mok Hur(허목),Seong Cheol Koo(구성철),Mei Lan Jin,Woo Moon Lee(이우문),Jae Ki Chang(장재기),Yeon Bok Kim(김연복) 한국약용작물학회 2017 한국약용작물학회 학술대회논문집 Vol.2017 No.1
Attitude Dynamics Model-Based Gyroless Attitude Estimation for Agile Spacecraft
Sung-Hoon Mok,SooYung Byeon,Hyochoong Bang,Yoonhyuk Choi 제어로봇시스템학회 2018 제어로봇시스템학회 국제학술대회 논문집 Vol.2018 No.10
With increasing demand for high-agility spacecraft, the importance of accurate attitude estimation in high-agility condition is gradually increasing. In previous high-cost spacecraft missions, high-quality gyroscopes were able to be employed and the conventional gyro-based Kalman filter has provided accurate attitude estimates. However, in low-cost missions such as CubeSat missions, high-quality gyroscopes usually cannot be adopted due to its expensive price and large size/power/mass, and this leads to performance degradation in high-agility condition. This proceeding presents a simple example that illustrates how high-agility condition induces performance degradation in a classical gyro-based Kalman filter framework. Then, an alternative attitude estimation method that is based on a model-based gyroless Kalman filter framework is proposed. Numerical results demonstrate that the proposed gyroless filter could exhibit comparable attitude estimation performance, compared to the gyro-based filter, when gyro performance belongs to an industrial grade (such as MEMS gyros). The proposed gyroless filter could be implemented as a main attitude estimation method or as a backup estimation method, depending on available gyros’ performance.
Gravitational Wave Astrophysics with the Superconducting Low-frequency Gravitational-wave Telescope
Sang-Hyeon Ahn,Yeong-Bok Bae,Gungwon Kang,Chunglee Kim,Whansun Kim,John J. Oh,Sang Hoon Oh,Chan Park,Edwin J. Son,Hyung Mok Lee,Hyungwon Lee,Hyunkyu Lee,Chang-Hwan Lee,Ho Jung Paik 한국천문학회 2017 天文學會報 Vol.42 No.2