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최우석,강석봉,Choi, Woo-Suk,Kang, Seok-Bong 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.4
Objectives : This experiment was done to evaluate the effects of Hyuntogobon-hwan(HTG) on antioxidant capability and lipidic concentration in blood, both of which are presumed to be related to aging. Methods : 12 week-old SD rats were divided into controlled group, uncontrolled group and HTG group. As controlled and HTG groups were given subcutaneous injection of D-galactose(50mg/kg/rat), at the same time HTG group was administered extract of Hyuntogobon-hwan(270mg/200g). HTG injections continued for 6 weeks. After initial injections, blood was drawn from each group and the following were measured: the activity of SOD, GSH-px, catalase in erythrocytes, TSARS value, concentration of total lipid, tryglyceride in blood plasma. Results : The activities of SOD and GSH-px in erythrocytes increased significantly in HTG group compared with controlled group. The activity of catalase seemed to increase slightly, but it was barely noticeable. The concentration of total lipid in plasma decreased significantly in HTG group compared with controlled group. The value of TBARS in plasma seemed to decrease slightly, but it was barely noticeable. Conclusions : According to the above results, Hyuntogobon-hwan has an influence on aging by virtue of activation of antioxidative enzyme systems in erythrocytes and concentrations of lipid in blood plasma.
Neuroimaging of Traumatic Brain Injury
최우석,Choi, Woo Suk The Korean Society of Biological Psychiatry 1995 생물정신의학 Vol.2 No.2
두부 외상은 많은 발생율과 사망율을 차지하고 있으며, 건강한 생활을 위해 큰 관심을 갖게 되었다. 신경방사선영상은 외상성 뇌손상 환자들의 진단과 치료에 필수적인 방법이다. 뇌손상의 기본 기전, 병리, 그리고 영상 소견을 이해 하는 것은 매우 중요하다. 1970년대에 Glasgow coma scale의 형상과 전산화단층촬영(CT)의 발달은 임상의사들이 두부외상에 대한 평가와 환자들의 경과를 예상하는데 극적인 변화를 주었다. 최근 자기공명영상(MRI)의 발달로 외상성 뇌손상의 형태를 더욱 이해 하게 되었고, 두부 외상의 발견율이 높아지게 되었다.
최우석,고영태,임재훈,이선화,윤엽,이동호,임언,이봉암,김국기,김광명,김태성,Choi, Woo-Suk,Ko, Young-Tae,Lim, Jae-Hoon,Lee, Sun-Wha,Yoon, Yup,Lee, Dong-Ho,Leem, Won,Rhee, Bong-Arm,Kim, Gook-Ki,Kim, Kwang-Myung,Kim, Tae-Sung 대한영상의학회 1987 대한영상의학회지 Vol.23 No.1
The computed tomographic findings of cerebral arterial ectasia in 8 patients, of which 5 cases were angiographically documented, are reported. The ectatic arteries, located predominantly in the suprasellar and interpeduncular cisterns, appeared as serpiginous, tubular structures on the unenhanced scan. The enhanced CT scan demonstrated dense, sharply defined, homogeneous intraluminal enhancement. Until recently, the diagnosis of cerebral arterial ectasia was usually established by angiography. With introduction of CT it has become possible to noninvasively indentify and characterize this vascular disorder and its associated intracranial complications. The vertebrobasilar dolichoectasia may be diagnosed by CT as an extra-axial lesioin in the cerebellopontione angle. It enhances in a tubular fashion after intravenous injection of contrast.
인쇄용 페이스트의 조성변화가 탄소나노튜브 캐소드의 전계방출 특성에 미치는 영향
최우석,신허영,김동희,안병건,정원섭,이동구,조영래,Choi, Woo-Suk,Shin, Heo-Young,Kim, Dong-Hee,Ahn, Byung-Gun,Chung, Won-Sub,Lee, Dong-Gu,Cho, Young-Rea 한국재료학회 2003 한국재료학회지 Vol.13 No.10
The effects of paste materials on field emission properties in a carbon nanotube(CNT) cathode were investigated for high-efficient field emission displays. The major components in CNT paste for screen printing were a metallic Ag-paste, a dielectric glass-frit and CNT ink. The emission current from the cathode by an electron tunneling effect increased with an increase in the dielectric material fraction in the CNT paste, which is related to an increase of field enhancement factor in Fowler-Nordheim equation. The surface treatment used, after soft baking of the screen-printed CNT films, greatly affected the decrease in the turn-on field in CNT cathode and the uniformity of emission sites over the entire CNT film area.
대보음환(大補陰丸)이 Streptozotocin으로 유도된 백서(白鼠)의 당뇨병 및 당뇨병 합병증에 미치는 영향
최우석,윤경민,이연경,강석봉,Choi, Woo-Suk,Yoon, Kyeong-Min,Lee, Yeon-Kyeong,Kang, Seok-Bong 대한한방내과학회 2009 大韓韓方內科學會誌 Vol.30 No.4
Objectives : The object of this study was to investigate the effects of Daeboeum-hwan (DBEH) aqueous extracts on Streptozotocin (STZ)-induced rat diabetes and related complications. Methods : SD rats were divided into 6 groups (n =8) : 50 mM citrate buffer and vehicle (distilled water 5 ml/kg) administered group (Intact control), STZ treatment (60 mg/kg, single intraperitoneally administered) and vehicle administered group (STZ control), STZ treatment and silymarin 100 mg/kg administered group (Reference), and STZ treatment and DBEH extracts 50, 100 and 200 mg/kg administered groups. DBEH extracts were orally administered once a day for 28 days from 3 weeks after STZ treatment. The results were compared with silymarin 100 mg/kg. Results : Decreases in the body weights, increase of kidney and liver weights, blood glucose, BUN, creatinine, AST, ALT, LDL, triglyceride and total cholesterol levels with decreases of HD L levels, increases of pancreatic MDA contents and decreases of GSH contents were detected in STZ control as compared with intact control. These diabetes and related complications were inhibited by treatment with 100 and 200 mg/kg of DBEH extracts. Conclusion : DBEH extracts showed favorable effects on STZ-induced diabetes and related complications mediated by their antioxidant effects as similar to silymarin. Because the lowest dosage (50 mg/kg) of DBEH treated group did not show any favorable effects as compared with STZ control, the effective dosages of DBEH is considered as about 100 mg/kg, while DBEH extracts at 200 mg/kg showed similar effects as compared with 100 mg/kg of silymarin. It, therefore, is expected that DBEH will show favorable effects on diabetes and various diabetic complications.
TMS320LF2406 DSP를 이용한 FCU용 유도 전동기 속도제어
최우석(Woo-Suk Choi),김이훈(Lee-Hun Kim),박규현(Kyu-Hyun Park),원충연(Chung-Yuen Won),이상석(Sang-Suk Lee),최창영(Chang-Young Choi) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.-
This paper designs a drive for high efficiency of the 3-phase IM (induction motor) for FCU(Fan Coil Unit). The speed control system of 3-phase IM for FCU has been implemented by a TMS320LF2406 DSP chip. The DSP TMS320LF2406, which include the most peripheral circuit for control of the industrial motor suitable for AC motor drive. This type of the controller can be obtained low cost and high reliance. The proposed drive system of the 3-phase IM for the FCU is verified by simulation. The results show the speed control characteristics of the control strategy proposed for 3-phase IM drive.<br/> <br/>
논문(論文) : 이백(李白)의 < 행역(行役) >시(詩) 초탐(初探)
최우석 ( Woo Suk Choi ) 고려대학교 중국학연구소 2015 中國學論叢 Vol.50 No.-
This paper analyzes the poetry of “XingYi” by Li Bai and studies the characteristics of expressions in it. First, this poetry mainly includes appreciating scenary, longing for friends, the yearning for Yinyl, and other things. The majority of appreciating scenary is composed of depicting natural scenary in motion. The author Li Bai also describes the longing for his home town and friends. Furthermore, The yearning for Yinyl incorporates the desire to live with Taoist hermits in remote forests. In the remaining parts, he expresses his sorrows for not being able to fulfill his will and longing for the Palace. The poetry of XingYi was influenced by Xiaotong’s Wenxuan in its content and format. In addition, the author describes the speed of moving quite fastly in joyful feelings and depicts it quite slowly in adverse or sad feelings. Finally, the author utilized hyperbole, simile, and abundant imagination which renders this poetry masterfully romantic.