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.

한국전력 가공송전선의 허용전류를 증가시키기 위한 기상모델의 평가

김성덕 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.2

전력설비 시장의 새롭게 조정된 경제환경으로 인하여 송전선로에 대한 투자와 운용 정책에 근본적인 변화가 초래되었다. 따라서, 최악의 기상조건을 사용하는 형식적인 가정들을 토대로 주어지는 도체의 허용전류를 증가시키기 위하여 현재 설비를 평가하는 것이 중요하게 되었다. 여전히 세계의 대부분 전력회사에서는 정적송전용량을 채용하고 있지만, 몇몇 회사들은 송전용량을 증가시키기 위하여 동적송전용량을 실시간으로 모니터링 하는 등 다양한 시도를 해왔다. 이 연구는 기상모델로 규정된 한국전력공사(KEPCO)의 송전선로의 정적송전용량을 평가하기 위한 시도이다. 과거 기상청에서 관측된 기상 데이터를 근거로 송전용량을 결정하기 위한 몇 가지 환경적 특성을 검토하였다. 그 결과, 한국전력의 송전선로에 계절별 또는 지역별 정격을 적용할 수 있으며, 현재 운용 중인 도체를 새로운 고내열 도체로 교체하지 않더라도 기존 송전용량을 좀더 증대시킬 수 있음을 확인하였다. The new deregulated economic environment in the power utility market is forcing fundamental changes in the investment and operational decisions regarding transmission lines. Hence, it has come to be an important issue to evaluate their current utility in order to increase conductor ampacity based on conservative assumptions of worst case weather conditions. Static thermal rating has born still applied in most power companies worldwide, however some of them have been done various trials such as monitoring dynamic line ratings to increase line ratings in real time. This study is an attempt to access the static line ratings in Korea Electric Power Corporation(KEPCO) transmission lines, which were specified by weather model. Several environmental performances for determining static line ratings are examined by using the past weather data of Korean Meteorological Administration. As a result, it is shown that seasonal or regional line ratings could be adopt to the KEPCO's transmission lines, and their line ratings could be more increased without refurbishing current conductors in service to new high-temperature ones.

기상예보시스템을 이용한 가공송전선의 단기간 동적송전용량 예측

김성덕,이승수,장태인,장지원,이동일,Kim, Sung-Duck,Lee, Seung-Su,Jang, Tae-In,Kang, Ji-Won,Lee, Dong-Il 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.6

본 논문에서는 실시간 기상예보데이터를 사용하여 가공송전선의 단시간 송전용량을 예측하기 위한 방법을 제안한다. 기상청에서 제공되는 예보기온, 풍속등급 및 날씨코드와 같은 3시간 예보요소들을 분석하여 기상예보데이터와 실제 측정데이터 사이의 상관성이 분석되었다. 동적송전용량을 결정하는데 사용하기 위하여 이러한 요소들은 적당한 수치로 변환되었다. 또한 풍속과 일사량에 대한 신뢰도를 개선하기 위하여 적응뉴로퍼지시스템이 설계되었다. 기상예보데이터가 송전용량을 신뢰성을 갖도록 추정하는데 사용될 수 있음을 밝혔다. 그 결과 제안된 예측시스템이 단시간 용량예측에 효율적으로 실용화될 수 있을 것이다. A method for predicting the short-term dynamic line ratings in overhead transmission lines using real-time weather forecast data is proposed in this paper. Through some inspections for the 3-hour interval forecasting factors such as ambient temperature, wind speed grade and weather code given by KMA(Korea Meteorological Administration), correlation properties between forecast weather data and actual measured data are analyzed. To use these variable in determining the dynamic line ratings, they are changed into suitable numerical values. Furthermore adaptive neuro-fuzzy systems to improve reliabilities for wind speed and solar heat radiation ate designed It was verified that the forecast weather data can be used to predict the line rating with reliable. As a result it can be possible that the proposed predicting system can be effectively utilized by their anticipation a short-time in advance.

간접도체 방식을 이용한 가공송전선의 동적송전용량 추정

김성덕,이승수,장태인,강지원,이동일,Kim, Sung-Duck,Lee, Seung-Su,Jang, Tae-In,Kang, Ji-Won,Lee, Dong-Il 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.5

고가공도체의 최대허용전류인 열용량은 일반적으로 IEEE P738 기준에서 주어진 것과 같은 열평형 방정식을 기초로 계산된다. 이 정격은 기온, 풍속, 풍향 및 태양열과 같은 기상조건의 함수로 주어진다. 이러한 기상 파라미터들 중에 풍속은 그 값이 아주 작게 나타날 때 송전용량 결정에 강한 영향을 준다. 따라서 송전용량 모니터시스템에서 사용되는 풍속계 대부분은 낮은 감도와 실속 특성을 가지므로 부정확한 결과가 나타난다. 본 논문에서는 풍속계를 사용하지 않고 가공송전선의 동적송전용량을 결정하기 위한 새로운 방법을 도입한다. 풍속을 2개의 간접도체의 온도로 추정하고 실험을 통하여 추정풍속으로 구한 동적송전용량이 기상모델로 구한 결과와 매우 근접함을 밝혔다. The thermal rating of an overhead conductor, which is the maximum allowable current, is generally calculated on the basis of heat balance equation found in IEEE P738 standard. This is given as a function of the weather conditions such as air temperature, wind speed, wind direction, and sun heat. Wind speed among such weather parameters is strongly affected on determining the line rating when it appears very low level. Therefore there may occur inaccuracy since most anemometers used in line rating monitor systems may show low resolutions and stall speed performance. In this paper, we introduce a new methodology for determining the dynamic line rating in overhead transmission lines, without using my anemometer. It was shown that wind speed can be estimated by the temperatures of 2 indirect conductors, and through experimental study, the dynamic line rating obtained by the estimated wind speed was very closely that of weather model.

개에서 Lidocaine 과 Diltiazem 의 혈역학적 상호작용

김성덕,정익수 대한마취과학회 1991 Korean Journal of Anesthesiology Vol.24 No.5

The hemodynamic interactions of lidocaine and diltiazem during halothane anesthesia were studied using eight mongrel dogs. The animals were anesthetized with inhalation of 1.0 MAC of halothane(GroupH) continuously throughout the experiment. 30 minutes after the inhalated and end-tidal halothane concentration reached equilibrium, 0.2 mg/kg of diltiazem was given intravenously over 2.0 min. From that point 8 ㎍/kg/min of diltiazem was continuously infused (group HD). Then a small dose of lidocaine(group HD1; iv bolus 1.5 mg/kg over l min, followed by continuous iv infusion at the rate of O.l mg/kg/min for 30 min) and a large dose of lidocaine (group HDI; iv bolus 1.0 mg/kg over I min, followed by continuous iv infusion at the rate of 0.3 mg/kg/min for 30 min) were administered serially. In group HD, PR interval increased significantly(22.2%) and coronary perfusion pressure decreased significantly(l9.3%), compared with group H. Compared with group H, significant increase in PR interval(44.4%), and decreases in diastolic arterial blood pressure(28%), mean arterial blood pressure(20.1%) and rate pressure product(35.2%) occured in group HD1. In group HDL, a significant decrease in heart rate(20.7%) and coronary perfusion pressure(33.0%) also occured, compared with group H. No significant changes in oxygen transport and consumption existed among groups. The most significant result of the injection of lidocaine diltiazem during halothane anesthesia in dogs was increase in PR interval. Even in high doses of lidocaine, only slight hemody- namic depression resulted and no significant changes in tissue oxygenation occurred. Therefore, the combined administration of diltiazem and lidocaine in clinical doses during halothane anes- thesia in dogs is a relatively safe administrative method.

국토안전 정책 혁신·스마트 안전기술 개발 국토안전관리원 안전성능연구소 소개

김성덕 한국건축시공학회 2022 건축시공 Vol.22 No.4

고농도 산소 투여가 백서의 폐에 미치는 병태 생리학적 영향

김성덕,박재현 대한마취과학회 1995 Korean Journal of Anesthesiology Vol.28 No.3

An animal model was used to study the effects of normobaric hyperoxia on pulmonary mechanics and histopathology. Thirty two rats (227±46gm) were divided into control (Group 1) in room air and 3 hyperoxic groups (n=8, each). Hyperoxic groups breathed F₁O₂ 0.98 for 24 hr(Group 2), 48 hr(Group 3), and 72 hr(Group 4), respectively. After hyperoxia, rats were intubated through tracheostomy, and inflation and deflation compliances of lung-thorax [CLT(I), CLT(D)] were calculated. Body weight(BW) was measured, and lungs were removed and weighed(LW). The lung specimens were examined microscopically. At the 3rd day of hyperoxia, 5 of 8 rats were died (63% mortality). CLT(I) of Group 4 was low (p$lt;0.05) compared with others, and CLT(D) of all hyperoxic groups were low (p$lt;0.05) compared with control. Mean LW/BW (lung weight divided by body weight) was elevated (p$lt;0.05) in Group 3 and Group 4. Pulmonary pathologic findings such as inflammation, congestion, alveolar and bronchial wall damage, pulmonary edema etc. became aparent (p$lt;0.05) at the 3rd day. We conclude that during hyperoxia pulmonary compliance might be decreased and lung weight might be increased progressively, and pulmonary pathological appearance of normobaric hyperoxia (F₁O₂ $gt; 0.98) resemble those of adult respiratory distress syndrome (ARDS).

공공스포츠센터 종사자의 경력정체가 냉소주의 및 반응행동에 미치는 영향

김성덕 한국체육대학교 체육과학연구소 2019 스포츠사이언스 Vol.37 No.1

The purpose of this study was to identify the Relationship among Career Plateau, Organizational Cynicism and the Response Behavior (EVLN) of Public Sports Facilities Members. In order to achieve this goal, the employees(n=187) working at the public sports facility in Seoul were selected to conduct the survey through the Convenience sampling method. Based upon the results of their responses, descriptive analysis and correlation analysis were conducted taking advantage of SPSS 20.0 and AMOS 20.0. And, in order to measure reliability, Cronbach's α was conducted. Also, in order to identify a set model based on theoretical grounds, suitability was assured through the analysis of structure equation modeling. And the results are as follows. (1) Public sport center members Career Plateau have Partial effect on Organizational Cynicism. (2) Public sport center members Career Plateau have Partial effect on Response Behavior (EVLN). (3) Public sport center members Organizational Cynicism have Partial effect on Response Behavior (EVLN). 본 연구는 공공스포츠센터 종사자의 경력정체와 냉소주의 및 조직 반응행동(EVLN)에 미치는 영향을 규명하는데 그목적이 있다. 이러한 목적을 달성하기 위해 2018년 9월부터 11월까지 서울시 산하 공공스포츠센터 종사자를 모집단으로 총 240명을 편의표집방법을 이용하여 표본을 추출하였고, 최종적으로 187부의 자료 를 SPSS 20.0, Amos 20.0 프로그램을 이용하여 기술통계분석과 빈도분석을 실시하였고, 신뢰도를 측정하기 위해 Cronbach's α 검사를 하였다. 또한 해당변인의 구성타당도를 검증하기 위해 확인적 요인분석, 상관관계 분석, 가설 검증을 위해 구조방정식 모형검증과 경로분석을 실시하였다. 그 결과 첫째, 공공스포츠센터 종사자의 경력정체가 냉소주의에 부분적인 영향을미쳤다. 둘째, 공공스포츠센터 종사자의 경력정체가 조직 반응행동(EVLN)에 부분적인 영향을 미쳤다. 셋째, 공공스포츠센터 종사자의 냉소주의는 조직 반응행동(EVLN)에 부분적인 영향을 미쳤다

호흡관리 중환자의 혈청교질 삼투압에 관한 연구

김성덕,최덕환,고홍 최신의학사 1982 最新醫學 Vol.25 No.12

고객 접점 스포츠 서비스 종사자의 개인-환경 적합성과 직무스트레스 및 이직의도의 관계

김성덕 한국스포츠학회 2015 한국스포츠학회지 Vol.13 No.4

The purpose of this study was to identify the relationship between Person-environment fit, job stress and turnover intention of employees in the sport service field. in order to achieve this goal, the employees(n=215) were selected to conduct the survey through the cluster sampling method. Using SPSS 20.0 and AMOS 20.0 the study provides descriptive analysis, correlation analysis, confirmatory factor analysis, and structural equations modeling analysis. The outcomes indicate that; (1) Person-environment fit have negative effect on job stress. (2) Person-environment fit is statistically significant to have negative effect on turnover intention. and (3) job stress has a positive impact on turnover intention.