저산소성 개에서 급성 동량성 혈액희석시의 순환계 반응

김성덕,임승운 대한마취과학회 1988 Korean Journal of Anesthesiology Vol.21 No.2

The circulatory responses to acute isovolemic hemodilution were studied in nine mongrel dogs in hypoxic (FIO2=0.15) environment. The animals were bled 20 ml/kg of blood. The shed blood was replaced by equivalent amounts of low molecular weight dextran (LMWD). Hemodynamic measurements and calculations were performed in control normoxic period, hypoxic period before bleeding, hypoxic period after bleeding and after hemodilution with LMWD. By hemodilution, Hb and Hct were decreased from 13.6±0.8gm/dl and 41±2% to 12.9±0.9gm/dl and 21±2%, respectively. Hypoxia itself did not cause any hemodynamic changes. Bleeding caused significant increases in SVR (60%) and PVR (77.9%), and resulted in decreases in CI (40.0%), TI (32.7%) and PCWP (2.0%) compared with the data in control period. Hemodilution reversed gemodynamic changes induced by bleeding. PVR returned to normal and SVR was rather decreased by 24.2%. CI, PCWP and CVP were increased by 25.4%, 6.0%, and 37.5%, respectively. The parameters such as HR and RPP which might be related to oxygen consumption were decreased by 10.6%, compared with control data. This study demonstrated that, in spite of lowered arterial oxygen content during hemodilution, tissue oxygen supply and cardiac performance might be well maintained by combined effects of decreased afterload and oxygen consuming factors, and increased preload. In conclusion, acute isovolemic hemodilution with LMWD might be a safe tolerable method in the aspects of circulatory respones in hypoxic dogs.

관계혜택과 고객만족, 전환 장벽 및 고객 충성도의 관계

김성덕,이현우 한국스포츠학회 2013 한국스포츠학회지 Vol.11 No.2

태권도장 지도자의 역할모호성, 역할갈등 및 직무만족의 관계: 더미변수를 사용한 관장과 사범간의 분석

김성덕,박동영,최영준 한국스포츠학회 2015 한국스포츠학회지 Vol.13 No.2

The purpose of this study was to investigate the relationships among perceived role ambiguity, perceived role conflict and percieved job satisfaction of Taekwondo masters and instructors:Analysis by using Dummy variable between Masters and Instructors. Using a convenience sampling method, a total of 219 responses were collected from the Taekwondo Instructors who participated in the job training session hosted by Korea Taekwondo Association. Descriptive statistics, exploratory factor analysis, t-test, correlations analysis and dummy variable regression were executed using SPSS Window 21.0 Version With a series of data analysis, the researchers found that 1) the group of Taekwondo instructors showed the significantly higher role conflict. and 2) the group of Taekwondo instructors significantly affected perceived role conflict.

뿌리산업 생산성 향상을 위한 주요 정책 방향

김성덕,박일정 한국표면공학회 2019 한국표면공학회 학술발표회 초록집 Vol.2019 No.5

[같은 본문 다른 설교] 비전은 현재의 준비를 요구합니다. (수 1:10-18)

김성덕 한국신학정보연구원 2007 헤르메네이아 투데이 Vol.37 No.-

탄소성(彈塑性) 지반(地盤)위에 놓인 원형평판(圓形平板)의 유한요소(有限要素) 해석(解析)

김성덕,장승필,Kim, Sung Deuk,Chang, Sung Pil 대한토목학회 1987 대한토목학회논문집 Vol.7 No.4

Boussinesq 지반형(地盤型)의 탄소성체지반(彈塑性體地盤)위에 놓인 원형평판(圓形平板)이 축대칭하중(軸對稱荷重)을 받았을 경우의 거동을 파악하기 위하여 8절점(節點) 등매개변수요소(媒介變數要素)를 사용한 유한요소해석(有限要素解析) 방법(方法)을 이론적(理論的)으로 발전시키고 이를 수행하기 위한 컴퓨터 프로그램을 개발하였다. 이론(理論)의 정당성을 입증하기 위해 모형실험을 수행한 결과 지반(地盤)의 항복조건으로 Mohr-Coulomb 강복이론(降伏理論)을 적용한 수치해(數値解)의 결과(結果)와 실험결과(實驗結果)가 근사함을 확인하였다. Mohr-Coulomb의 파괴이론(破壞理論)을 적용한 비선형해석(非線型解析)을 수행한 예제(例題)의 결과로 부터, 지반의 소성영역(塑性領域)이 원판(圓板)의 녹단부근(綠端附近)에서 발생하기 시작하여 중심축둘레로 연결되었을 때 접지압(接地壓)이 급격히 변하여 전단파괴(剪斷破壞)의 위험성(危險性)이 있다고 판단되고 이 때의 외부작용하중(外部作用荷重)을 임계하중(臨界荷重)으로 정의하였다. In this study, the finite element method using 8-node isoparametric element is developed theoretically and simulated to see the deformation of soil and plate, when the circular plate resting on Boussinesq's soil type is loaded axisymmetrically. The results of numerical analysis using the Mohr-Coulomb yield criterion, and experimental analysis are approximative, assuming that soil is elasto-plastic medium. The paper shows that the plastic zone of soil medium is displayed at the near the edge of plate at the first place; when the plastic zone of soil medium is linked around central axis, the external load is termed by critical load, and then the contact pressure changes abruptly, in this case it is approved to be the risk of shear failure.

기후변화를 고려한 토석류 재해취약지역 레질리언스 강화를 위한 연구

김성덕,이호진,장형준 위기관리 이론과 실천 2022 Crisisonomy Vol.18 No.6

Recently, climate change has caused serious natural disasters at the vulnerable areas with many mountainous regions. This study analyzes the behavior of debris flow with respect to time elapse by applying various precipitation, mountain slope change, and the categories of vegetation loosened in mountainous areas. The behavior of debris flow is debris flow discharge and water depth. In addition, the runout length of debris flow passed through the channel and reached the downstream according to the change of the water supply and slope was measured. The larger the supply flow, the higher the debris flow discharge, and the second peak value became faster as the supply flow increased, and the slope became steeper. In the category where the multiplier of vegetation for debris flow is large, the fluctuation period was made long, and the amplitude of the fluctuation was also made large. As for the debris flow runout length, the supply flow was large and it was spread in a considerable range on steep slopes. This study will provide various information such as establishing measures for debris flow occurring in vulnerable areas to natural disasters due to climate change, or establishing a plan for strengthening resilience. 최근의 기후변화는 심각한 자연재해를 발생시켜, 산지가 많은 재해취약지역에서 많은 피해를 양산한다. 본 연구는 기후변화의 특성을 고려하였으며, 이를 위하여 강수변화, 산지 경사면 변화 및 느슨해진 산지에서 식생의 범주를 적용하여 시간변화에 대한 토석류 거동을 해석한 것이다. 이때 토석류의 거동은 토석류량과 토석류의 수심을 나타낸다. 또한, 공급유량과 사면 경사의 변화 따라서 토석류가 수로를 지나 하류로 도달한 후의 유하거리를 측정하였다. 공급유량이 클수록 고유량의 토석류를나타났고, 두 번째 첨두(Peak)가 공급유량이 많을수록 빨라졌으며, 그 기울기는 더 가파르게 나타났다. 식생의 가중치가 큰 범주에서 변동성(fluctuation) 구간이 길게 만들어 졌고, 변동성의 진폭도 크게만들어졌다. 토석류 확산길이는 공급유량이 많고, 급경사지에서 상당 범위로 확산되었다. 이상에서본 연구의 결과는 기후변화로 의한 자연재해 취약 지역 및 난개발 지역 등에서 발생하는 토석류대책을 수립하거나, 레질리언스 강화를 위한 계획 수립 등에 다양한 정보를 제공할 것이다.

세부 전문의 제도 도입을 위한 절차

김성덕 대한외과학회 2006 대한외과학회 학술대회 초록집 Vol.2006 No.11

선천성 동정맥기형의 선택적 색전술 후 수술적 제거

김성덕,문구현,방사익,오갑성,현원석 대한성형외과학회 2003 Archives of Plastic Surgery Vol.30 No.6

Arteriovenous malformation(AVM) is an abnormal communication between an artery and a vein and often causes significant hemorrhage or cosmetic problems. Treatment of these vascular anomalies is hazardous and has high incidence of recurrence. A multidisciplinary team approach is required in the assessment and treatment of the lesion, and preoperative angiography with superselective embolization followed by resection is required. The authors performed nine cases of the wide resection of the congenital arteriovenous malformation(7 on the head and neck, 2 on the trunk) between April 1998 and January 2002. All patients underwent preoperative embolization with n-butyl 2-cyanoacrylate at 1 week before operation. Preoperative embolization resulted in significant devascularization of the AVM thus leading to minimal bleeding during operation. After resection, direct closure were performed in 6 cases, skin graft in 1 case, free transverse rectus abdominis musculocutaneous flap in 1 case, and tissue expansion using tissue expander in 1case. There was one complication related with embolization procedure in temple AVM patient. No recurrence has been recognized during the follow-up period, which ranges from 16 to 61 months. Preoperative embolization with n-butyl 2-cyanoacrylate and surgical resection of the AVM provided excellent long-term palliation in patients with congenital AVM.

Storm Surge에 대한 피해와 예측

김성덕,김병식,Kim, Seong-Deok,Kim, Byeong-Sik 한국수자원학회 2016 물과 미래(한국수자원학회지) Vol.49 No.10