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원종열,지민호,박성호,정영규,백두현,Won, Jong-Yeol,Jee, Min-Ho,Park, Sung-Ho,Jeong, Young-Gyu,Baik, Doo-Hyun 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.1
We have prepared conductive fibers by coating poly(ethylene terephthalate) (PET) fibers with solutions composed of multi-walled carbon nanotube (MWNT), surfactant and binder, and characterized surface morphology and electrical properties of MWNT-coated PET fibers. FE-SEM images of MWNT-coated PET fibers confirmed that MWNTs were successfully coated on surfaces of PET fibers. It was found that MWNT-coated PET fibers prepared have maximum conductivities of ${\sim}10^0\;S/cm$. Even after abrasion tests, the electric conductivities of MWNT-coated PET fibers remained in the order of ${\sim}10^{-2}\;S/cm$, which was still much higher than the value (${\sim}10^{-13}\;S/cm$) of neat PET fibers. Overall, it was revealed that the MWNT-coating method can be a efficient process to produce conductive fibers without deteriorating mechanical properties of original fibers.
안지오텐신 변환효소 억제제와 안지오텐신 II 수용체 차단제 투여 후 발생한 급성 신부전과 폐부종으로 전원된 선천성 단일신 환자의 치료 1예
백두현,김경진,홍성철,강석형,송하응,김혜인,김수현,오현정,강혜원,김서우,유민아,류동열,최규복,강덕희 이화여자대학교 의과대학 2010 EMJ (Ewha medical journal) Vol.33 No.1
Blockers of renin-angiotensin system(RAS) including ACE inhibitor or ARB are one of the most frequently prescribed medications for the treatment of hypertension, heart failure and proteinuria. One of the major side effects of these RAS blockers is the deterioration of renal function, mainly due to a reduction of intraglomerular pressure. Therefore, close monitoring of renal function is recommended when RAS blockers are initially prescribed, especially for the patients with impaired renal function. We report a patient who was transferred to our hospital due to the sudden development of oliguria and dyspnea after treatment for hypertension with ACEi and ARB. She was finally diagnosed as RAS blocker-induced acute renal failure with pulmonary edema complicated on congenital solitary kidney. After hemodialysis and conservative treatment, her renal function was recovered with maintenance of normal urine output. Conclusion:This case highlights the necessity of the functional and structural evaluation of kidney to prevent the serious complication such as acute renal failure before the administration of ACEi and/or ARB.
이동교,정문열,백두원,Lee, Dong-Gyo,Jeong, Mun-Yeol,Baek, Du-Won 한국컴퓨터그래픽스학회 2002 컴퓨터그래픽스학회논문지 Vol.8 No.4
In this paper we propose a new efficient muscle modeling for creating 3d facial models. It improves the existing muscle-based facial modeling method. We present the facial muscle action prediction map as a new method of muscle modeling. We also suggest a new face deformation method that improves the existing method which controls each muscle's condition separately. 본 논문에서는 디자이너가 제작한 3차원얼굴 모델을 생성하기 위해 표준 3차원 얼굴 모델을 변형하는 방법을 제시한다. 3차원 얼굴 모델을 변형하는 방법에는 근육에 기반 한 얼굴 변형 방법이 대표적인데, 본 논문에서는 기존의 얼굴 근육에 기반 한 얼굴 변형방법의 비효율적인 면을 개선하고 근육에 기반 한 보다 직관적인 얼굴 변형을 위해 얼굴 근육 운동 예측맵을 정의하고 이를 이용하여 근육을 독립적으로 처리하고 정의 했던 기존의 단점과 근육의 배치와 설정작업을 개선하고자 한다.
Glucose/Hydrogen Peroxide Redox System을 사용한 견직물의 저온염색
이내연,백두현,임종열,임영훈 충남대학교 공업교육연구소 1993 論文集 Vol.16 No.1
The low-temperature dyeing system for silk fabrics based on a redox system has been investigated. Some factors affecting dyeing of silk fabrics with levelling acid dyes in the absence and presence of certain redox system were investigated under different conditions. The variables studied were the type and concentration of redox system with different dyeing conditions, i.e. temperature and time, dye concentration, material-to-liquor ratio (LR) and colour fastness. The colour strength (K/S value) is remarkably higher in the presence than in the absence of redox system. In the presence of redox system, free radicals are supposed to the formed both the fiber and the dye, and the interaction between free radicals bring about covalent fixation beside the usual electrostatic bonds, hydrogen bonds and Van der Waals forces.
雨水管路 滿水時 水理學的擧動에 대한 XP-SWMM와 水理模型實驗의 比較 硏究
최한규,백효선,백두열 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B
To use land more efficiently under urbanization trend, Kangwon Province often covers open channels of creeks and uses them as parking lots or roads. A covered open channel section tends to form a rectangular culvert. Therefore, a creek with covered open channels can function as a storm drain. At the time of light rainfall, there are no significant differences except water flowing pattern between a creek with a covered open channel and a creek without it. Recently, however, the frequent occurrence of heavy rainfalls limited at a small, definite area has become problematic. When the heavy rainfall causes the carrying capacity of a creek to be exceeded, the creek with covered open channel has a more serious problem than the creek without it has. Therefore, we made an interpretation of data and conducted hydraulic model experiment to come up with economical solution to this problem.