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서정기,김인환,장승현,김병옥,류재욱,박정학,Seo, Jeong Gi,Kim, In Hwan,Jang, Seung Hyeon,Kim, Byeong Ok,Ryu, Jae Uk,Park, Jeong Hak Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.4
Poly(p-tert-butyltrimethoxymonopropyloxycalix[4]arene-methylsiloxane) (TBCX-MS) has been prepared and used as a stationary phase in isothermal capillary gas chromatographic separation of some positional isomers. Retention factors (k) and separatio n factors $(\alpha)$ for the isomers were measured and compared with those on poly(p-tert-butyl-dimethoxydipropyloxycalix[4]arene-tetramethyldisiloxane) (TBCX-TMDS), poly(dimethoxydipropyloxycalix[4]arenetetramethyl-disiloxane) (CX-TMDS). Most of the isomers investigated are well resolved on TBCX-MS. Retention of all the compounds decreases on the three phases in the order, TBCX-TMDS ${\geq}$ TBCX-MS > CX-TMDS. Similar retention values on TBCX-TMDS and TBCX-MS seem to indicate that retention property of the two phases is not significantly affected by the spatial position of the calixarene moiety.
이성세,이승우,신구환,서정기,Lee, Seong-Se,Lee, Seung-U,Sin, Gu-Hwan,Seo, Jeong-Gi 한국천문학회 2012 天文學會報 Vol.37 No.2
과학기술위성 3호는 드네프르 발사체에 의해서 클러스터 형태로 발사될 예정이다. 본 논문에서는 과학기술위성 3호의 발사와 관련된 기계적 인터페이스, 전기적 인터페이스, 궤도 인터페이스, 발사장 인터페이스, 환경 인터페이스 등을 세부 적으로 기술한다. 이러한 인터페이스를 바탕으로 소형위성의 클러스터 발사의 기본적은 개념을 정의 할 수 있으며, 추후 소형위성 발사와 관련된 기본 기술을 확인 할 수 있다.
유욱재,백지윤,조동현,장경원,서정기,허지연,이봉수,조영호,박병기,문주현,Yoo, Wook-Jae,Baek, Ji-Yun,Cho, Dong-Hyun,Jang, Kyoung-Won,Seo, Jeong-Ki,Heo, Ji-Yeon,Lee, Bong-Soo,Cho, Young-Ho,Park, Byung-Gi,Moon, Joo-Hyun 대한의용생체공학회 2009 의공학회지 Vol.30 No.6
In this study, we fabricated a plastic optical fiber based sensor which can monitor the respiration of a patient. The circumference changes of the abdomen were measured using a mirror, a light source and optical detectors because the circumferences of the abdomen could be varied with respiration. The intensity of the reflected lights were measured according to the changes of distance between mirror and plastic optical fiber connected to a light source and a photodiode-amplifier system using a Y-coupler. The respiration signals of fiber-optic sensor system were compared with those of the respiratory and temperature transducers of the $BIOPAC^{(R)}$ system. It is expected that a fiber-optic respiration sensor could be developed for real time respiration monitoring during MRI procedure based on this study.