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Dither 효과를 이용한 서어보 위치 제어계의 응답특성 개선
홍창희,장기효 동아대학교 공과대학 부설 한국자원개발연구소 1987 硏究報告 Vol.11 No.1
The position control system of DC servomotor using dither effect improves the characteristics of response, but oscillation in setting the desired position control is caused by jerking motion in the steady state. A method for supressing the jerking motion using dither effect is proposed. By this method compensating the characteristics of response in the case of setting the desired position control, we can verify the useful-ness of this method in obtaining the best characteristics of position control response in the position control system.
洪昌熹 忠州大學校 1971 한국교통대학교 논문집 Vol.4 No.1
Practical calculation of transient resistance effects in conductors are reported. Induced are the current density distribution in cylindrical and semi-infinite solid conductors for an applied surface step electric field E, and the density in a flat wide conductor. Two analogies used to yield useful result ; thermal diffusion in a cylinder and voltage transient, on a semi-infinite transmission line. Results are applied to the calculation of time constants of a transmission line.
홍창희,한규석 한국사회및성격심리학회 2007 한국심리학회지 사회 및 성격 Vol.21 No.4
This study was conducted to explore the structure of emotional expressivity among Korean adults and to construct the emotional expressivity scale (KEES), and to examine its reliability and validity. A pool of preliminary items were selected, based on the item analysis of an open questionnaire which was to search the characteristics of a highly emotional expressive person, and administered to 258 undergraduates and 105 normal adults, and KEES with 16 items was constructed using factor analyses on the data. KEES was highly reliable in terms of internal consistency and test-retest reliability. Factor analyses revealed that KEES had consistently three factors labeled ‘Activity', ‘Yeon-Min and In-Jeong', and ‘Expressivity'. And KEES was found to be highly correlated with other expressivity scales and personality variables, hence these results indicated that KEES had good construct validity. Also the implications and limitations of this study were discussed, and future directions of study were suggested. 본 연구는 한국 성인의 정서표현에 관한 구성개념을 탐색하고 그에 따른 척도를 구성하여 척도의 신뢰도와 타당도를 확인하고자 하였다. 일상생활에서 정서표현을 잘하는 사람들의 특징을 토대로 예비문항들을 선정한 후, 대학생 356명에게 문항 적절성을 평정케 하여 최종 16문항을 선정하였다. 최종 선정된 16문항의 예비척도를 대학생 258명과 일반인 105명에게 실시한 자료를 요인분석하여 16문항의 정서표현성척도를 제작하였다. 제작된 정서표현성척도는 내적 합치도 및 검사-재검사 신뢰도가 높았고, 학생 및 일반집단 모두에서 일관되게 ‘활동성’, ‘연민과 인정’, ‘표현성’의 3요인구조가 나타났다. 다른 정서표현성척도 및 성격특성 등과 높은 상관을 보여 척도의 구성타당도가 입증되었다. 끝으로 본 연구의 이론적 임상적 의의 및 제한점을 논의하였고, 추후 연구를 위한 시사점을 제안하였다.