QT연장 증후군 환자에서 Head-Up Tilt Test에 의해 유발된 Torsades De Pointes 1례

전익수,차태준,김길수,김동완,김규종,김찬욱,김성만,주승재,이재우 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.8

동일한 분류 알고리즘 하에서 상이한 언어의 실행시간에 관한 고찰

金完奎,金昌根 진주산업대학교 1989 論文集 Vol.27 No.-

What are relatrve to Run-time of computer langurage for one another under the same sort algorithm and influence the time of sorting are divided into three parts. The first is the character of algorithm, the second is the character of computer system, and the third is the character of languages, and to find effective language under the same algorithm and same system. Each language has its own speed of sorting under same algorithm, same system and same data. Pascal is the fastest of all and Fortran is the next one. Cobol is the latest one among them because Pascal and Fortran approach the character of algorithm descriptive language, but cobol don't. Pascal and Fortran is good for algorithm language, but Cobol is not.

CORBA 클라이언트/서버 구조의 자바 통합 개발 환경의 설계 및 구현

김완수,김흥준,박순규 진주산업대학교 2000 산업과학기술연구소보 Vol.- No.7

Today, most of the well-known software development tools and methods faced with problems of scalability, modularity, granularity, and maintenance. These problems result in the fact that these tools and methods are standalone. In this paper, we propose a design and implementation of software development environment for Java application based upon CORBA-based Client/Server model. Proposed model has facilities to overcome a problem caused by updates and its distribution and is possible to overcome problems of scalability, modularity and granularity because it based upon Client/Server model.

기계적 합금화한 Al-50Ni 합금의 조직에 관한 연구

金完哲,金容圭 홍익대학교 산업기술연구소 1993 産業技術 Vol.2 No.-

Particle properties such as size, distribution, shape, composition, and structure are greatly influencing on the mechanical properties of final P/M products. Therefore, it is necessary that powders should be uniformed and strengthened by mechanical alloying. Degree of mechanical alloying of Al-50Ni powders can be determined by observing the microstructural refinement, microhardness, and microstructure of composite metal powder during processing. The mechanical alloying Process could be divided in five stages : initial stage, welding predominance stage, spherical particle formation stage, random welding predominance stage and steady state. Mechanical alloying reached to a steady state after 600 min processing as the finer lamellar microstruture could to no longer resolved in the 10∼20㎛ and the powder particle size distribution remained constant with processing time and a saturation hardness of 450 Hv had been attained. The rate of structural refinement of Al-50 Ni Composite was roughly logarithmic with processing time : ε= 2.915 ln(1 + 0.014t).

Nalidixic Acid를 제조할 수 있는 중간체 合成

金寅圭,金奎完 成均館大學校 1981 論文集 Vol.30 No.-

En route to Nalidixic acid which is a potent antibacterial agent, 3-cyano-2-〔(ethoxy carbonylethyl) ethylamino〕-6methylpyridine was synthessized from 3-cyano-6-methyl-2-pyridone, and 2-chloro-3-cyano-6-methylpyridine necessary for the production of the 3-cyano-2-〔(ethoxy carbonylethyl) ethylamino〕-6-methylpyridine was obtained by the chlorination of 3-cyano-6-methyl-2-pyridone which was in turn synthesized from cyanoacetamide and sodiumformylacetone. The yields were generally good.

EDP監査에 관한 考察

金完奎,崔炳玉 진주산업대학교 1991 論文集 Vol.29 No.-

A computer audit needs so that the modern information society that depends on computers preserves from computer unfairness is being committed by a human malice or intention. Acorrdingly, necessary conditions in order to execute the audit of EDP faithfully are as follows. 1) To secure auditors who have an expert knowledge about the audit of EDP. 2) Setting up the audit system and the audit standard that help measuring a computer control process. 3) The highest chief understanding of the audit of EDP. 4) To secure of resources that needs to fulfill a auditor's duties.

무등산도립공원의 이용실태 및 형태분석

김희우,이규완,최기호 호남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.8 No.-

무등산도립공원을 대상으로 자연자원의 보전과 이용자의 합리적인 관리를 위한 기초자료를 제시하고자 이용실태 및 행태를 분석하였다. 이용자의 특성은 남자가 63.0%, 40∼50대가 49.1%, 광주시민이 94.0%이었다. 그리고 이용자의 대부분이 한달 평균 2∼5회 정도 이용하고 있는 것으로 나타났다. 방문 목적을 보면 건강을 위하여가 57.9%를 보이지만 한편, 사계절이용의 근린적 성격의 행태와 유원지적 행태가 동시에 나타나고 있다. 무등산도립공원의 이용자는 비교적 한계절에 집중되지 않고 년중 지속적으로 이용하고 있으며, 원효사와 증심사집단시설지구의 이용비율은 22.8%와 77.2%로 나타났다. 따라서 무등산도립공원은 자연공원으로 성격과 근린적 성격의 피크닉, 도시적 성격의 유원지적 행태를 고려하여 기능적 상충성 해소를 위한 공간 분할관리가 필요하다. The purpose of this study is to suggest objective basic data for natural resources and visitiors management proposal through the analysis of visiting patterns and activities in The Mt. Moodeung san provincial park. The user's composition of socio-economic characteristics showed that male, forties to fifties and citizens of Kwangju were 63.0%, 49.1% and 94.0% respectively by gender, age and residential area and also, user's visit park two to five times a month. In visiting purpose, the good health was 57.9% of the total but the patterns as of neighbourhood park and the patterns as of recreation ground were appealed simultaneously. The user's were continuously visited four seasons. Therefore partitioned spatial management in consideration of nature park, picnic pattern as of neighbourhood park and recreation pattern as of recreation ground shall be necessary to solve the conflicts among functions.

PWM 인버터 시스템에서의 전도노이즈 저감을 위한 출력필터 설계에 관한 연구

金利勳,朴奎炫,元忠淵,金榮石,崔世琓 성균관대학교 2002 학술회의지원논문목록집 Vol.2002 No.-

본 논문에서는 PWM 인버터-유도전동기 구동시스템의 전도노이즈 저감을 위한 출력필터 설계에 관한 연구를 수행하였다. 전도 노이즈는 고전압 압력, 고용량 구동시스템, 그리고 긴 전동기 터미널 등의 경우에서 크게 문제가 된다. 고압력을 갖는 시스템에서는 높은 압력에 비례한 직류 링크 전압을 갖고 이에 따라 스위칭 시 dv/dt가 순간 최대 CM 접지전류를 발생시킨다. 그러므로 이에 대한 대책에 필요하다. 따라서 최근 산업 현장에서 많이 사용되고 있는 PWM 인버터를 설계 제작하여 유도전동기를 구동하고 이에 따라 발생되는 전도노이즈 성분을 감쇠 시킬 수 있는 출력필터를 설계하였고 제작 및 실험을 통하여 그 타당성을 입증하였다. In this paper, filtering techniques to reduce the adverse effects of motor leads on high-frequency PWM inverter fed AC motor drives are presented. The filter was designed to keep the motor terminal from the cable surge impedance to reduce overvoltage reflections, ringing, and the dv/dr, di/dt, at the motor terminals. Specially, the output filter is used to limit the rate of the inverter output voltage and reduce common mode noise to the motor. The performance of the output filter is evaluated through simulations and experiment on PWM inverter-fed AC motor drive. An experimental PWM drive system reduction of conducted EMI was implemented on an available TMS320C31 micoprocessor controd board. Finally, experimental result shows inverter output filter reduces more common mode voltage than low pass filter also reduce overvoltage and ringing at the motor terminal.

급냉응고된 Mg-Zn-Ca 합금의 시효특성에 관한 연구

金完哲,朴廷珪 홍익대학교 산업기술연구소 2000 産業技術 Vol.10 No.-

In this study, the transition of microstructure, precipitation behavior and influence of precipitate phases on hardness were investigated in the Mg-Zn-Ca alloys made by the melt spinning method. The hardness of strip increased with the addition of Ca and Zn. Hardening seems to be caused by the crystallization of Mg_2Ca and Mg_2Zn_3 particles, and also by the refinement of grains by the Ca addition. In the aging treatment at constant temperature, age hardening was found to occur. Maximum hardness was obtained at 200℃, followed by the decrease in hardness as the temperature was raised above 200℃. When the Zn content was over 10wt%, however, age hardening effect was not observed. Mg_2Ca and Mg_2Zn_3 particles were precipitated by aging treatment. In the aging treatment of 1.5wt% Ca alloys, spherecal precipitates were formed inside a grain, and eutectic precipitates both inside a grain and along the grain boundary. In the aging treatment of 5wt% Ca alloys, spherecal precipitates and very fine dispersive precipitates were formed. It may be concluded that formation of the dispersive precipitation is the major mechanism for the age hardening.

分娩中 母體 및 臍帶血漿의 β-endorphin 및 Prolactin 値의 變動에 關한 硏究

金鍾洹,李揆玩,姜宰成,洪性鳳 고려대학교 의과대학 1987 고려대 의대 잡지 Vol.24 No.1

β-endorphin is derived from proopiomelanocortin (POMC) and has been implicated as the modulators of pain during labor. Prolactin secretion is increased during pregnancy more than tenfold compared to the non-pregnant levels, but decreased following delivery. This study was undertaken to determine the levels of β-endorphin and prolactin in healthy term pregnant women during the labor, after delivery and their neonates. β-endorphin and prolactin were measured by radioimmunoassay in 22 spontaneous labors and 14 elective cesarean sections during early and late stages of labor, and after delivery. The results obtained are as follows: 1. In cases of spontaneous vaginal delivery, the maternal plasma β-endorphin levels were significantly increased during the first postpartum hour. The maternal plasma prolactin levels were significantly decreased during the late labor than early labor and increased during the first postpartum hour. 2. In cases of elective cesarean sections, the maternal mean plasma level of β-endorphin was significantly lower than spontaneous veginal delivery But there was no difference in maternal mean plasma levels of prolactin between cesarean sections and spontaneous veginal delivery. 3. There was negative correlation between the maternal plasma β-endorphin and prolactin during the late labor. 4. Umbilical arterial β-endorphin levels in newborn infants after spontaneous veginal deliveries were significantly higher than levels in infants born by elective cesarean section. Umbilical arterial prolactin levels in newborn infants after spontaneous vaginal deliveries showed higher than infants born by elective cesarean sections, though there was no statistical significance between them. 5. There was no relationship between the maternal and the umbilical plasma β-endorphin and prolactin level. There was no significant correlation between levels of β-endorphin and prolactin in the cord plasma, fetal weight and placental weight. Present studies suggest that β-endorphin is significantly increased during late labor, but significantly decreased in prolactin during labor due to stress and pain.