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백세민,김수신,김동일,김우경,차진한 大韓成形外科學會 1988 Archives of Plastic Surgery Vol.15 No.4
There is increasing demand by cleft patients for improvement in their esthetic appearance and occlusion. Cleft lip and palate deformoty is a multifaceted problem. It is important to consider the underlying skeleton of the face as well as the covering soft tissue. With proper presurgical planing such as photographic, cephalmetric and dental cast analysis, the two jaw osteotomy and other procedures were performed simultaneously in 6 post-cleft deformity cases. We improved their facial appearance and occlusion. Their acceptance and satisfaction are exceptionally high.
한흥수,김우경,김수신,백세민 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.1
Recently, soft tissue expansion technique using tissue expanders has become a popular method for reconstruction of soft tissue defect because it provides high quality tissue with similar color, texture and hair bearing characteristics without significant donor site problems. During the period September, 1983 to December, 1988, we used tissue expanders to treat 36 patients with soft tissue defect, 3 scalp, 10 face, 6 neck, 4 trunk, 10 upper extremity, 3 lower extremity and evaluated the operative techniques, results and complications as follows. 1. We achieved favorable results in 31 cases(86.1%), especially in scalp, face and upper extremity, but poor results in lower extremity, especially below knee in location. 2. We experienced major complications in 2 cases(5.6%) such as implant exposure and minor complications in 7 cases(19.4%) such as hematoma, partial necrosis, infection, underlying bony depression etc. 3. Capsular excision is not desirable, but capsular release may permitted to acquire maximal length of the advancing flap. 4. In case of microtia, expanded tissue which was obtained from expanders is defficient for elevation of framework without skin graft. 5. Accurate and meticulous preoperative evaluation is the most important factor in achieving good and results.
BaZr_0.95Y_0.05O_2.975의 전기전도 특성
朴漢壽,白鉉德 홍익대학교 산업기술연구소 1999 産業技術 Vol.9 No.-
Electrical conduction in BaZr_0.95Y_0.05O_2.975. was invesigated. Aging effect was observed in total conductivity. Partial conductivities, contributed, by protons, oxygen ions and electron holes, were determined from the relationship of total conductivity vs. partial pressures of water vapor and oxygen. Protons were minority defects, which had been observed in other zirconate HTPCs. As a result, proton conductivity and total conductivity increased with P_w^1/2
상류지점 수위표 수위변동에 따른 하류지점 수위표 수위변동예측
최한규,임윤수,백효선 江原大學校 産業技術硏究所 2010 産業技術硏究 Vol.30 No.B
Generally, the accuracy of the prediction of flood elevation is difficult to identify due to the sedimentation on a river bed, earth and sand being moved by flow, and localized torrential downpours caused by climate change. It is also because of natural and artificial influences on rivers. To predict river floodings successfully, more precise and reliable flood elevation prediction system is needed, in which the concentration time of downstream is numerically interpreted through analyzing and utilizing the watermark of the upper region. Therefore, this research analyzed the prediction methods of the changes in water levels, which use the watermarks of the upper region. The watermarks which impacts the spot being predicted of flood was selected through floodgate analysis and correlation analysis. With the selected watermarks, a statistically reliable regression equation was yielded.
고온프로톤전도성 산화물에 대한 수중기 분위기에서 σ tot vs. Po_2^1/4 그림으로 부터 전기전도도의 모델링
朴漢壽,白鉉德 홍익대학교 산업기술연구소 1997 産業技術 Vol.7 No.-
This work demonstrates a method for modeling of electrical conductivity in high-temperature proton-conduction oxides. Total conductivity was calculated assuming that it comprises partial conductivities contributed by proton. oxygen ion and electron hole. From the plot σ_tot vs po_2^1/4 in wet atmosphere, thermodynamic and kinetic parameters were obtained representing transport properties such as concentration and mobility of the charge-carrying defects. The formulae for the calculation of partial conductivities were derived based on the defect structure of HTPCs. Illustrative calculations were made for SrCe_0.95Yb_0.05O_2.976.
金雄秀,林漢旭,李慶雲,徐栢洙 江原大學校 産業技術硏究所 1983 産業技術硏究 Vol.3 No.-
The blast vibrations were measured from 10 places through Seoul subway area to study their effects on the structures and to establish the safe blasting limits. For purpose of the present study, particle velocity only was recorded and analyzed, because it correlated most directly with damage. The results are as follows: (1) The proagation equation, V=K(D/W1/3)-n was obtained. Typical values could be found for n range from 1.7 to 1.5 and for k range from 48 to 138. (2) From the relationship between schmidt hammer rebound hardness and uniaxial compressive strength, Sc=0.514×(S.H)0.23, the compressive strength at any area can be assumed. (3) The use of AN-FO and other explosives with low detonation pressure may reduce vibration levels generated.
複雜한 地形에서의 Schwartz-christofel 變換을 利用한 電位計算의 基礎的 硏究(Ⅰ)
金雄秀,林漢旭,徐栢洙 江原大學校 産業科學硏究所 1982 産業技術硏究 Vol.2 No.-
Schwartz-christofel transformation has been widely used to solve engineering problems. In this paper, this transformation is used to calculate topographic problems. Any two points of z-plane are transformed into ε-plane by Schwartz-Christofel transformation using calculator.
朴漢壽,白鉉德 홍익대학교 산업기술연구소 2003 産業技術 Vol.13 No.-
When hydrogen is dissolved in an oxide, protons and electrons make diffusion pair and thus lead to the transport of H_(2) under its chemical potential gradient. The present manuscript develops relationships between the chemical diffusion coefficient of H_(2) and the diffusion coefficient of protons and electrons by determining thermodynamic factor of H_(2), W_(H)_(2). When thermodynamic ideal behavior is assumed for protons and electrons, W_(H)_(2) turns out to be 4. If hydrogen solubility in the oxide follows Henrian ideal behavior, W_(H)_(2)= 1. In case hydrogen solubility obeys Sivert's law, we obtain W_(H)_(2)= 2.
양수 다발성 수지 재접합수의 치험례 : 4 cases report
차진한,박명철,김우경,한근태,김수신,백세민 大韓成形外科學會 1990 Archives of Plastic Surgery Vol.17 No.2
Since the first successful replantation operation, several reports have been recorded replantated finger survival with high success rates. But ten and nine digits amputations are not common. It is even more unusual to have all digits suitable for replantation. 4 cases are presented where replantation of ten and nine digits were done at the department of PRS. Guro Hospital, Korea University from March 1987 to Jun 1988. In these cases, the patients were young and healthy, all of ten and nine digits were sharply amputed near the proximal phalanx, so a replantation team of 8 surgeons in alternating fashion replanted all ten and nine digits over 30 hours and each patient received 28 pints of whole blood during the procedure. Under general anesthesia, replantatin of both started simultaneously. All digits survived completely except partial necosis of right little finger in case 1. The ischemic time of each digit ranged from 4 hours and 45 minutes to 31 hours as shown in table 5. The long ischemic time did not criticaly affected the survival of amputated digit. Follow-up was from 12 months to 20 months postoperatively. The functional evaluation revealed as follows: 1. The grasping power ranged 13 lb to 65 lb(average;39.7lb) 2. The pinching power with index finger ranged 5 lb to 15 lb(average:10.2 lb) 3. The palm to pulp distance ranged 0 cm to 6 cm.(average;2.2cm) 4. The two point discrimination ranged 2.5mm to 22mm.(average;7.8mm) 5. The shape of digits were acceptable aesthetically. 6. All 4 patients were able to use both hands well in all activities of daily living.