Digital Converter로 구동되는 크레인용 직류전동기 속도제어 시스템의 안정도 해석

변성태,김종훈,정태동,구태만 울산대학교 1996 공학연구논문집 Vol.27 No.1

크레인 구동용으로 antiparallel converter의 반도체 전력회로에 마이크로 제어기를 사용한 직류전동기의 속도제어 시스템에 대한 안정영역을 해석한다. 먼저 불연속 전류인 경우 converter의 비선형특성으로 인하여 전동기 속도제어 능력이 저하되므로 이를 보상하는 방식을 제안한다. 이 converter와 직류전동기를 포함한 전체 속도제어 시스템을 이산형 상태방적식으로 모델링 한 후, 각 제어기 이득에 대한 안정영역을 해석한다. The stability regions for microcontroller-based dc motor speed control system driven by antiparallel converter, which has been used as the crane drive, are analyzed, first as the performance of motor speed control is deteriorated due to nonlinear characteristics of the converter in the discontinous current state, the method to compense for nonlinear characteristics of the converter is suggested. The overall dc motor speed control system including the converter and dc motor is represented by a discrete-time state equation, and then the stability regions for gains of controllers are dervied.

비만 여중생과 정상 여중생의 혈중지질 비교분석

김태운,신군수,김종인,이광무,김성헌,안병철,고기준 釜山大學校 附設 體育科學硏究所 1995 體育科學硏究所 論文集 Vol.11 No.-

The purpose of this study was to analyze and identify the serum lipids of the middle school girls in order to utilize them as the basic data for the prevention of the middle school girls against arteriosclerosis and diabetes tending to lower age. We used total of twelve middle school girls as subject and devided them into two groups : obese group(n=6), normal group(n=6). The measurement items were the Total-cholesterol, HDL-cholesterol, LDL-cholesterol, TG, FFA. The conclusion of this study was as follows : 1. Total-cholesterol 1) All two groups was a little increased by maximal exercise, but there was no significant difference statistically. 2) Normal group was a little higher than obese group, but there was no significant difference. 2. HDL-cholesterol 1) All two groups was a little increased by maximal exercise, but there was no significant difference. 2) In comparison of two groups, normal group was a little high on empty stomach and obese group was a little high before and after exercise, but there was no significant difference. 3. LDL-cholesterol 1) All two groups was a little increased on post-exercise than pre-exercise, but there was no significant difference statistically. 2) In comparison of two groups, normal group was a little higher than obese group, but there was no significant difference. 4. Triglyceride 1) All two groups was a little increased by maximal exercise, but there was no significant difference. 2) In comparison of two groups, normal group was a little higher than obese group on empty stomach and obese group was a little higher than normal group on pre and post-exercise, but there was no significant difference. 5. T-chol./HDL-chol. 1) All two groups was a little increased by maximal exercise, but there was no significant difference. 2) In comparison of two groups, normal group was a little higher than obese group, but there was no significant difference. 6. Free Fatty Acid 1) All two groups was a little decreased by maximal exercise, but there was no significant difference. 2) In comparison of two groups, obese group was a little higher than normal group, but there was no significant difference.

일 도시 지역의 외상후 스트레스 장애 역학 조사

은헌정,이선미,김태형 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.4

연구목적 : 이 연구는 DSM-IV에 근거한 외상후 스트레스 장애(Posttrauamatic Stress disorder : 이하PTSD)의 평생 유병률 및 현재 유병률을 평가하고, PTSD와 관련된 외상 사건의 유형과 사회인구학적 특성을 조사하고 한다. 방 법 : 조사를 위해, 전체 인구가 611,921명인 한 도시가 선택되었고, 도시 내 15세에서 65세 이상인 850명을 표집하여, 가정 방문을 통해 외상사건 조사표와 임상가 실시용PTSD척도(CAPS)를 적용하여 실시하였다. 결 과 : 연구 지역내에서 PTSD의 평생 유병률은 4.71%, 현재 유병률은 2.12%이었다. 평생 및 현재 유병률에서 남녀간에 통계적으로 유의한 차이가 없었다. (p>.05). 또한 나이, 교육에 따른 평생 유병률도 통계적으로 유의한 차이가 없었다.(p<.001). 단지 결혼 상태에 따른 평생 유병률에서 통계적으로 유의한 차이가 있었다. 외상사건에 평생 동안 노출될 확률은 78.79%이었다. 갑작스럽고 예기치 않았던 친지의 죽음이 가장 흔히 발생하는 사건이었다(51.06%). 자연재해, 화재 및 폭발, 교통사고, 가정 및 직장에서의 심각한 사고, 신체적폭력, 무기로 공격함, 전쟁, 생명을 위협하는 질병, 누군가를 심하게 다치게 하거나 죽음에 이르도록 함과 같은 사건은 남성에서 여성들보다 더 자주 발생하였고, 여성들에게는 성폭행이 더 자주 발생하였다. PTSD발병과 상관이 높은 외상사건은 자연재해, 화재 및 폭발, 교통사고, 가정 및 직장에서의 심각한 사고, 신체적 폭력, 성폭행, 생명을 위협하는 질병 등 이었다. 결 론 : 조사 지역 내에서 PTSD의 유병율은 다른 대부분의 선행 연구들에 비해 낮았다. 본 연구에서는 성별에 따라 흔히 경험한 외상사건의 유형에 차이가 있으며, PTSD와 관련된 외상사건들도 차이가 있음을 발견했다. 앞으로 역학 연구에서 외상 사건들로부터 PTSD를 일으킬 확률을 알기 위해서는 회고적으로 보고한 제한된 소수의 외상사건들을 조사하기 보다는 평생 경험하는 모든 외상사건들을 평가해야 할 것이며, 전국전인 표집을 해야 할 필요가 있을 것으로 생각된다. Objectives : This study was designed to assess the epidemiology of DSM-IV posttraumatic stress disorder(PTSD), including information on lifetime and current prevalence, the kinds of traumas most often associated with PTSD, and sociodemographic correlates. Method : For this survey, an urban area with total population of 611,921 persons was chosen. Modified version of traumatic event checklist and Clinician Administered PTSD Scale were administrated to a representative sample of 850 persons aged 15 o 65 years above through home visiting. Results : The lifetime and current prevalence of PTSD in survey area was 4.71% and 2.12%. the lifetime and current prevalence in male and female were of no significant statistical differences(p>.05). And the lifetime prevalence by age, and education were of no significant statistical differences. Only the lifetime prevalence by marital status was of significant statistical differences(p<.001). The lifetime prevalence to any traumatic exposure was 78.79%. Sudden unexpected death of a close person was the most prevalent traumatic event(51.06%). Among the traumas, natural disaster, fire and explosion, motor vehicle accident, serious accident at work or home, physical assault, assault with a weapon, combat, life-threatening illness, and serious injury to death you caused to someone else were more commonly associated with male sex, and sexual assault was more commonly associated with female sex. The traumas commonly associated with PTSD were natural disaster, fire and explosion, motor vehicle accident, serious accident at work or home, physical assault, sexual assault, combat, and life-threatening illness. Conclusion : The lifetime and current prevalence in survey area were lower than those of previous studies. This study found differences between men and women on the type of trauma experienced, and the type of trauma associated with PTSD. Future epidemiological studies to assess PTSD from all lifetime traumas rather than from only a small number of retrospectively reported ones will be required, and larger sample size covering the country will be required for better estimation.

방향족 폴리에스터 폴리올을 이용한 폴리우레탄 분산체의 합성과 특성에 관한 연구

주훈관,조항규,노시태,강신춘,안재범 한국공업화학회 2004 응용화학 Vol.8 No.1

Aromatic polyurethane dispersions were synthesized with dimethylolpropionic acid (DMPA), isophorone diisocyanate(IPDI), and aromatic polyester polyol, prepared chemical reaction of esterification and polycondensation, The structures of these polyurethanes were characterized by FT0IR, H-NMR, and the properties were measured with DSC, TGA. Increase aromatic polyol contents made of unplasticized polyurethane dispersions. As the aromatic structures in polyurethane dispersions introduced, glass transition temperature(T_(g)) and thermal stability increased. In this polyurethane dispersions increased with DMPA concentrations, particle size decreased and dispersible stability increased and T_(g) increased over 50℃.

고압상평형 측정을 위하여 미량시료채취법에 의한 분석방법 연구

변헌수,김태규,곽철 여수대학교 1996 論文集 Vol.10 No.-

In order to plant design of supercritical separatation process, the high pressure phase equilibrium data are essential. In analysis method, the phase equilibria data of each phase by the microsampling technique were analyze by gas chromatograhpy in microsampling with heavy molecular weight. The calibration results of vapor and liquid phase sampling loop were presented 26.4㎕ and 22.7㎕, respectively. In this work, the RRF(relative response factor) on the tetralin, α-tetralone and α-tetralol were showed 1.87, 1.60 and 1.65. Using the calibrated valve, obtained the high pressure phase equilibria and mixture density data of the vapor and liquid phase.

초임계 이산화탄소내에서 방향족탄화수소와의 삼성분계 혼합물에 관한 기액상평형

최태현,변헌수 여수대학교 1998 論文集 Vol.11 No.2

The high pressure vapor-liquid equilibrium data are essential in order to separate the mixture of toluene and p-xylene with supercritical carbon dioxide. The circulation type vapor-liquid equilibrium apparatus has been used during this research to get ternary data of toluene, p-xylene and carbon dioxide system. The ternary phase liquid-vapor equilibria of carbon dioxide, toluene and p-xylene were measured for pressures ranging from about 26 bar to the 100 bar at 100℃. The liquid phase composition of carbon dioxide and the sum of vapor phase compositions of toluene and p-xylene are increased as the pressure is increased.

Data Link Control 방식을 이용한 PLC 중앙 감시 및 제어 시스템 개발에 관한 연구

손태훈,원태현 동의공업대학 1999 論文集 Vol.25 No.1

This paper presents a design of PLC central monitoring and control system using data link control formula. Communication program for monitoring and control have been developed by BASIC language.

전력시스템의 부하주파수 제어를 위한 뉴로-퍼지제어기 설계

손태훈,김상효 동의공업대학 2000 論文集 Vol.26 No.1

The load frequency control of power system is one of important subjects in view of system operation and control. That is, even though the rapid load disturbances were applied to the given power system, the stable and reliable power should be supplied to the users, converging unconditionally and rapidly the frequency deviations and the tie-line power flow ones of each area into allowable boundary limits. Nonetheless of such needs, if the internal parameter perturbation and the sudden load variation were given, the unstable phenomena of power system can be often brought out because of the large frequency deviation and the unsuppressible power line one. Therefore, it is desirable to design the robust power system controller which can stabilize effectively the given power system as soon as possible, In this paper the robust neuro-fuzzy controller was proposed and applied to control of load frequency over multi-area power system. The architecture and algorithm of a designed NFC(Neuro-Fuzzy Controller) were consist of fuzzy controller and neural network for auto tuning of fuzzy controller. The adaptively learned antecedent and consequent parameters of membership functions in fuzzy controller were acquired from the steepest gradient method for error-back propagation algorithm.

運動負荷前後 肥滿女中生의 血中 Glucose, Insulin 및 Apolipoprotein 代謝變化

김태운,신군수,김종인,이광무,김성헌,안병철,고기준 釜山大學校 附設 體育科學硏究所 1994 體育科學硏究所 論文集 Vol.10 No.-

The purpose of this study was to determin a study on the change of blood glucose, insulin and apolipoprotein metabolism before and after maximal exercise in obese middle School girls. The subjects were included 2 groups (each group n=6) : obese group, non-obese group. The measurement variables were blood glucose, insulin and apolipoprotein before and after maximal exercise. The conclusion of this study was as follows: 1. Changes in glucose 1) Obese group had no significant differences by maximal exercise. 2) Non-obese group has been increased significantly by maximal exercise (P<.05). 3) No significant difference was found between two groups. 2. Changes in insulin 1) Obese group had non-obese group had no significant differences by maximal exercise. 2) Obese group has been increased significantly when comparing with non-obese group (P<.05). 3. Changes in apoliporprotein 1) Two groups in Apo-AI has been increased significantly pre and post maximal exercise(P<.05). 2) No significant difference on Apo-AI was found between two groups. 3) Obese group and non-obese group in Apo-B had no significant differences by maximal exercise. 4) No significant difference on Apo-B was found between two groups.

PC를 이용한 소아과 퇴원환자 관리시스템

하태선,이태수,차은종,박범수,한헌석,채수일 충북대학교 의과대학 충북대학교 의학연구소 1993 忠北醫大學術誌 Vol.3 No.1

본원 소아과 입원환자의 퇴원요약 기록을 전산관리하는 시스템을 개발하였다. 소아과 환자관리에 적합하도록 퇴원요약지를 설계하였고 개인용 컴퓨터를 사용하여 관리하도록 구성하였다. 주 기억장치 4MB와 보조기억 장치 120MB HDD을 장착한 PC-386DX 시스템을 기반으로 개발하였고 소프트웨어로는 FoxPro v2.0을 사용하였다. pull-down menu 방식과 window방식을 적용하여 비전문가라 할지라도 손쉽게 사용할수 있도록 하였고 정보입력 및 수정시 사용자 편의를 최대한 반영하고자 하였다. "AND"와 "OR"연산자를 사용하여 다양한 검색이 가능하였다. 본 시스템은 현재 본원 소아과에서 실무에 적용하고 있으며 향후 통계분석과 임상연구에 크게 활용할 수 있으리라 생각된다. A PC-based system was developded to manage discharge summary records of pediatric patients. It is based on a PC-386DX system equipped with 4MB memory and 120MB HDD, and its software was written in FOXPRO V2.0. Any users unfamiliar with computer can make an easy access to the data through pull-down menu and windows system. Logical operators of "AND" and/or "OR" enabled a flexible and various search conditions. The present system is being under clinical use in the Department of Pediatrics, and warrants future applications to statistical analysis as well as clinical research projects.