Repetitive Compensation Control for AGC System By Using Pre-Pass Rolling Data

Hwan?Seong KIM,Jin?Seon PARK,Sang?Dol LEE,Keum?Jae LEE,Sung?Kwan PARK 제어로봇시스템학회 2001 제어로봇시스템학회 국제학술대회 논문집 Vol.2001 No.10

흰쥐 시각교차위핵에서 Galanin 면역반응 축삭종말의 분포와 신경연접구조

박환태,백선용,김봉선,김진정,김재봉 대한해부학회 1992 Anatomy & Cell Biology Vol.25 No.4

흰쥐와 햄스터의 생체리듬과 관계된 신경핵에서 Fos 면역양성물질 발현에 관한 연구

박환태,박인식,백선용,김봉선,김진정,김재봉 대한해부학회 1994 Anatomy & Cell Biology Vol.27 No.1

파노라마 방사선사진에서 하악관과 이공의 관찰되는 정도

정성진,최의환,김재덕 대한구강악안면방사선학회 2001 Imaging Science in Dentistry Vol.31 No.3

Purpose : To determine the head position that the superior border of the mandibular canal as well as mental foramen can be more clearly visualized in panoramic radiography Materials and Methods : Ten dry mandibles were radiographed bilaterally using PM 2002 CC panoramic machine. A 20 mm thick aluminium filter was added to the slit collimator to obtain radiographs with acceptable density. The specimens were tilted by 2, 4, 6, 8, and 10 degrees downward with and without radiopaque markers. Radiopaque markers were inserted into the mandibular canals and the mental canals of each side of the specimens to serve as reference image when assessing the radiographs. The visibility of the mandibular canal and the mental foramen was estimated by 4 observers on all radiographs. The obtained results were analyzed statistically. Results : Mandibular canals were significantly more clearly visible in the radiographs with 4 and 6 degree downward position on both sides (P〈0.05). Mental foramens were significantly more clearly visible in the radiographs with 4, 6, and 8 degree downward on right side and 6 degree downward on left side (P〈0.05). There was not significant difference between right and left sides. Conclusion : Panoramic radiographs with 4 to 6 degree downward tilting could be valuable in locating the mandibular canal as well as the mental foramen. (Korean J Oral Maxillofac Radiol 2001; 31 : 153-8)

点間 位置 最適制御方式의 提案

李善熙,李洸稙,嚴基煥 서울産業大學校 1989 논문집 Vol.29 No.1

서어보계의 점간이동 동작에서 정지점 부근의 충격을 최소화하는 것을 중심으로 하고 겸하여 시간과 에너지까지 포함한 평가함수를 최소로 하는 제어방식을 제안하였다. 제안한 제어방식은 직류전동기를 동력장치로 이용한 제어계를 설계하여 컴퓨터 시뮬레이션하였다. 그 결과 기대한 제어특성을 얻었으면, 본 제어방식은 뱅-뱅 및 포화-비례제어 방식보다 정지점 부근의 충격, 정상오차, 시간, 에너지 등이 가장 적은 것을 알았다. In the point-to-point motion on servo system, a control mode which minimizes the performance index including the impact of end point, time and energy, is proposed. The proposed control modes 1 and 2 applied to the feed-back control system of D.C motor and then a computer simulation is conducted. The control mode 1 had less the impact of end point, steady state error, time and energy than the mode 2 or the bang-bang control mode.

기저핵부위에 국한된 외상성 뇌실질 출혈에 대한 임상적 고찰

김선환,송시헌,염진영,김성호,김윤 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.6

In this report, the authors analyzed retrospectively 20 cases of pure traumatic basal ganglia hemorrhage(TBGH) which were diagnosed and treated in our hospital between January 1990 and Jun 1995. The TBGH incidence constitutes 1.4% of all head trauma. It occures were commonly among the younger male patient groups. The main causes of trauma was motor vehicle accidents. The overall mortality rate was 15%. Low initial GCS score, fixed pupillary reflex, pathologic reflex, poor motor response and large hematoma size were all poor prognostic factors, resulting a high mortality or passimistic outcome.

敎師期待와 學生期待가 學業成積에 미치는 效果

文善模,李東煥 경상대학교 1999 學生生活硏究所報 Vol.25 No.-

The purpose of this study was to investigate the effects of teacher expectancy and student expectancy on academic acievement. The hypotheses to be tested were stated as follows: 1) There will be a difference in academic achievement between high-and low-level teacher expectancy of student expectancy on intellectual competence of students or teacher. 2) There will be an interaction effect between levels of teacher expectancy and student expectancy on intellectual competence. 3) There will be a difference in academic achievement between high-and low-level teacher and student expectancy on affective attitudes of students or teacher. 4) There will be an interaction effect between levels of teacher expectancy or student expectancy on affective attitudes. 5) There will be a difference in academic achievement between high-and low-level teacher expectancy or student expectancy on overall behaviors including intellectual competence and affective attitudes. 6) There will bean interaction effect between levels of teacher expectancy and student expectancy on overall behaviors. The subjects of this study were 180 middle school students, and they were randomly assigned to 12 conditions according to high-and low-level of teacher expectancy and student expectancy: 1) high-high level, 2) high-low level, 3) low-high level, and 4) low-low level. The measuring instruments used for study were as follows: 1) Teacher Expectancy Test reconstructed by referring An Analysis Table of Solomon & Kandal and A List of Sears. 2) Student Expectancy Test constructed by referring An Index of Teacher Efficiency of Kim Ch'ung-Haeng. 3) Academic achievements of mathematics (March, April, and May). To test the hypothesesA 2 (teacher expectancy: high and low) ×2(student expectancy: high and low) ×(3) (academic achievements of mathematics: March, April, and May) ANOVA was applied. The main findings of the study were as follows: 1) Teacher expectancy on intellectual competence, affective attitudes and overall behaviors of students affects academic achievements of students. 2) Student expectancy on intellectual competence and overall behaviors of teacher affects academic achievements of students. 3) There were no significant interaction effect between teacher expectancy and student expectancy on intellectual competence, affective attitudes, and overall behaviors of students or teacher.

산업단지 활성화 방안에 관한 연구 : 경남 김해시를 중심으로 Based on Gimhae City, Gyeongnam

김환선,이성호 釜山大學校 都市問題硏究所 2002 都市硏究報 Vol.13 No.-

Purpose of this research presents way for industrial complex activation and do contribution low class informer a little in bloc economy development drawing problem of industrial complex laying stress on Gyongsang-namdo Gimhae area. Problem of Gimhae area industrial complex can lift greatly 4 such as manpower problems, infrastructure unpreparedness, financial difficulty, related industry accumulation unpreparedness. Presented industrial complex activation way to solve these problems as follows. First, smooth human strength supply and melancholy human strength security are essential for manpower problems cough. Second, need cleaning material support for financial difficulty cough, financial favors, smooth capital loaning. Third, again, need expansion of infrastructure of communication etc.. and expansion of life convenient facilities. Fourth, administrative support such as simplification of formality, collectivization of factory, representative industry upbringing, synthesis support center operation is required.

고속, 고정밀 및 고생산성을 위한 머시닝 센터의 시스템 동정

정선환,노승훈 金烏工科大學校 1994 論文集 Vol.15 No.-

Machining center is one of the most important machine tools in the machine shop because of its productivity and high flexibility. This paper describes the system identification of the main spindle system of a machining center which was manufactured by a small and medium company in korea. The main spindle system greatly affects the cutting speed, accuracy, and productivity of the machine tools. The result shows that the main spindle system has acceptable dynamic performance in the current speed range, but it should be modified for the higher speed for the stable operation of the machine.

교육기관에서의 해킹 기법과 학내망 보안 방안에 관한 연구

이철환,한선관 인천교육대학교 과학교육연구소 2001 과학교육논총 Vol.13 No.-

본 연구는 교육기관에서의 학교망인 네트워크를 해킹하는 사례 및 이에 대한 보안 방법에 관한 연구이다. 이를 위해 보안의 중요성에 대해 논하고 최근 많이 발생하는 해킹 사고를 유형별로 분석하였다. 또한 이러한 해킹 사고가 학내망에 어떠한 위협을 주고 있으며 기술적으로 어떻게 발전하고 있는지 최근 해킹 동향 을 조사 분석하며 이를 방지하기 위한 보안 방법에 대해 논하였다. 마지막으로 바이러스의 위험과 그 예방에 대해 살펴봄으로써 실제 교육기관에서 적용할 수 있는 방향을 제시하였다. Security of network system is very important factor in the school information system. Almost all existing security systems are developed and implemented in very weak manner. And almost all computer is connected by security system at recently. Therefore, a majority of school network systems could be attacked by various hacking methods. The study investigate the methods of hacking technique and suggested a sound solution of school network security system. The importance of security, types of hacking/tracking accident, and the trends of hacking/ tracking method are reviewed. Finally the study summarized danger of virus, preventing method of virus, and implementation method in school system.