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Continued Fraction Expansion을 이용한 Dead Time 근사의 새로운 접근
조원휘 ( Won Hui Cho ),이지태 ( Jie Tae Lee ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.5
Dead times appear often in describing process dynamics and raise some difficulties in simulating process dynamics or analyzing process control systems. To relieve these difficulties, it is needed to approximate the infinite dimensional dead time by the finite dimensional transfer function and, for this, the Pade approximation method is often used. For the accurate approximation of the dead time, high order Pade approximation is needed and the high order Pade approximation is not easy to memorize and is not stable numerically. We propose a method based on the continued fraction expansion that provides the same transfer functions. The method is excellent numerically as well as systematic to be memorized easily. It can be used conveniently for the process control lecture and computations.
계재영,조원휘 대구보건대학 1997 대구보건대학 論文集 Vol.17 No.-
Childhood is very important in one s physical and psychological development through the whole life. The development status of childhood exerts an influence upon physical and spiritual health of the future. Especially its development is dominated by environmental conditions. Unlike adults, children have fantastic, clear, and various sensibility. As they always express themselves following their inner desires, we should provide them with children s culture and environment which can satisfy with their desires and promote their intelligence and spirit. As we investigate carefully that how our children live under the rapid changes of modem society, what they want, and how they behave, express and feel, it s necessary to develop the diversified and reasonable play things fit for children s characteristics which can satisfy with their eyelight improving lack facilities and considering what the want, and also can help the development of their physique, language, emotion, acknowledgment and sociality. First, as a plaything to help children s creativity, social development and physical development in a small in a small area, we made it to be used variously. Second, we made it be controlled according to the height and length because children grow up rapidly in their height and weight. Third, as it s users are young. we made it to be assembled easily and mode it with hygienic and strong materials. Fourth. we improved the degree of children s color satisfaction and efficiency, providing various colors to consider their psychology. As they can experience disjointing, jointing, stability and rhythm through children s various playing desires and the basic type of things using the playthings designed like these, their world can be more rightful.
죽음준비교육이 사회복지전공 대학생의 좋은 죽음에 대한 인식, 죽음태도 및 삶의 의미에 미치는 효과
길태영,조원휘 한국사회복지실천연구학회 2017 미래사회복지연구 Vol.8 No.2
본 연구에서는 죽음준비교육이 사회복지전공 대학생의 좋은 죽음에 대한 인식, 죽음태도 및 삶의 의미에 미치는 효과를 파악하기 위하여 비동일 통제집단 전후비교조사를 실시하였다. 연구대상자는 D시에 소재한 대학의 사회복지학과에 재학 중인 대학생 60명(실험군 30명, 대조군 30명)을 대상으로 실험군과 대조군으로 나누어 실험군에 총 8회기(주 2회, 각각 120분)에 걸쳐 죽음준비교육을 실시하였다. 자료 분석은 사전-사후-추후 검증을 위해서 독립표본 t검증, ANCOVA, 대응표본 t검증으로 실시하였다. 연구결과 죽음준비교육은 사회복지전공 대학생의 좋은 죽음에 대한 인식을 긍정적으로 높이는 효과가 있었고, 죽음태도 및 삶의 의미 변화에 유의미한 효과가 있었다. 이러한 연구결과를 바탕으로 사회복지전공 대학생의 좋은 죽음에 대한 인식, 죽음태도 및 삶의 의미에 대한 올바른 인식 함양을 돕기 위한 교육의 운영과 활용기반에 필요한 사회복지적 제언을 제시하였다.
박택용,조원휘,이정옥 大田産業大學校 1997 論文集 Vol.5 No.-
The modern residence environment should be familiar to meet the use' values and correspond with the societal changes. Now we suggest a way of holocaust culture for a convenient residence environment our unique holocaust. Furthermore, we are to satisfy the consumer's aesthetic demand by developing the design of room controller of gas boiler. And the consumption of gas boilers are increasing because of the new understanding of gas and the safety and convenience of it. So we beside the course of design of the basis of the trend of boiler business, consumer’s taste and the problem of exiting Products. The we came to a final design concept by the design process.
죽음준비교육이 사회복지전공 대학생의 좋은 죽음에 대한 인식, 죽음태도 및 삶의 의미에 미치는 효과
길태영(Tae-young Kil),조원휘(Won-hui Cho) 한국복지실천학회 2017 한국복지실천학회지 Vol.8 No.2
본 연구에서는 죽음준비교육이 사회복지전공 대학생의 좋은 죽음에 대한 인식, 죽음태도 및 삶의 의미에 미치는 효과를 파악하기 위하여 비동일 통제집단 전후비교조사를 실시하였다. 연구대상자는 D시에 소재한 대학의 사회복지학과에 재학 중인 대학생 60명 (실험군 30명, 대조군 30명)을 대상으로 실험군과 대조군으로 나누어 실험군에 총 8회 기(주 2회, 각각 120분)에 걸쳐 죽음준비교육을 실시하였다. 자료 분석은 사전-사후-추후 검증을 위해서 독립표본 t검증, ANCOVA, 대응표본 t검증으로 실시하였다. 연구 결과 죽음준비교육은 사회복지전공 대학생의 좋은 죽음에 대한 인식을 긍정적으로 높이는 효과가 있었고, 죽음태도 및 삶의 의미 변화에 유의미한 효과가 있었다. 이러한 연구 결과를 바탕으로 사회복지전공 대학생의 좋은 죽음에 대한 인식, 죽음태도 및 삶의 의미에 대한 올바른 인식 함양을 돕기 위한 교육의 운영과 활용기반에 필요한 사회복지적 제언을 제시하였다. The aims of this study were to investigated the effects of Death Preparation Education(DPE) on the perception of good death, death attitude and meaning of life of university students majoring in social welfare. The participants were 60 students (experimental group:30, control group:30) attending at university in D city and DPE was consisted of 8 sessions (twice a week, 120 minutes each). Data were collected before, after program and 10 weeks follow up. And data were analyzed using independent samples t-test, ANCOVA, and paired samples t-test. The results showed that DPE was effective on raising the perception of good death and had a significant effect on death attitude and meaning of life. Based on the results, we suggested the implications for the operation and application of social welfare education to help university students of majoring in social welfare to raise awareness of well-dying, death attitude and meaning of life.