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AIDS에 대한 保健敎育을 통한 一部 士兵의 知識 및 態度變化
홍순이,정문숙 韓國保健敎育學會 1994 보건교육건강증진학회지 Vol.11 No.1
This study was conducted to investigate changes of knowledge and attitude toward AIDS of soldier through health education. The sample was selected with and experimental group(160 persons who were received health education group) and control group(160 persons who were not received), 20-21 years of age from 320 persons(soldier) who were between in a certain base located in Kyung Gi province. The data was collected from 24th Feb. to 21st April 1993. By questionnaires before and post test for education process about 4 weeks(pre and post test). The results of this study were as follows ; Of 320 soldiers 66.6% had received health education on sex before attending in base, 58.8%(94 persons) of experimental group and 58.1%(93 persons) had experience with sexual intercourse. In characteristics related to sexul intercourse experience, age of first sexual intercourse for experimental group was 19 in highest percentage as 30.0%, 18 in control group, 64.9% of experimental group and 61.4% of control group answered no use condom during sexual intercourse. About the reasons why use condom 51.5% of experimental group answered to prevention of VD and 44.4% of conrtol group answered to prevention of partner's pregancy in the highest percentage. There was no significant difference between mean score of knowledge level of experimental group and mean score of control group in pre-test. There was significant difference between mean score(15.23) of experimental group and mean score(12.98) of control group(p<0.01) in post-test. The attitude level in pre, post education was mean score 11. There was significant difference between mean score(9.04) of experimental group in pre-test and mean score(9.39) in post education(p<0.05). Mean score of perceived susceptability level of experimental group decreased from mean score 2.84 in pre-test to 2.66 in post-test, there was no significant difference between mean score of pre-test and that of post-test in 2 group. There was no significant difference between mean scores of perceived severity of experimental group in pre-test and that in post-test and there was no significant difference between mean score of perceived severity of control group in pre-test and post-test. There was no significant differences between mean scores of perceived benefits to act health behavior of experimental group of control group and pre-test and post-test.
α-레벨집합 분해에 의한 서보시스템용 퍼지추론과 하드웨어
홍순일(S.I.Hong),안영주(Y.J.An),김정환(J.H.Kim),이요섭(Y.S.Lee) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
In this paper, we propose a calculation method for fuzzy control based on quantized α-cut decompoSItion<br/> of fuzzy sets, This method is easy to be implemented in analog hardware. The effect of quantization levels on defuzzified fuzzy inference result is investigated. A few quantization levels are sufficient for fuzzy control. The hardware implementation of this calculation method and the defuzzification by gravity center method by PWM are also presented.
IGBT를 이용한 직ㆍ병렬 공진방식 인버터의 고주파화에 관한 연구
홍순일(Hong Soon-II),류민섭(Ryu Min-Seob) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
본 연구에서는 고주파 유도가열을 위한 전원장치에 사용되는 인버터 시스템의 대용량, 고주파화를 실현하기 위한 고주파화 기술을 제안하였다. 부하 공진 인버터는 H형 전-브리지(Full-Bridge)로 구성하고 각 암당 IGBT를 2병렬로 조합하여 구성하고 부하는 직병열 공진회로로 구성한다, 스위칭 동작은 8개의 IGBT중 각 ARM당 2개씩 순차 제어하여 고속 대용량의 고주파 전력을 출력시킨다. 또한 스위칭을 스위치 턴온ㆍ오프시에 스위칭 손실을 줄이기 위해 ZVS(Zero-Voltage Switching)기법을 도입한다. 제어는 고정주파수 PWM(Pulse Widch Modulation)제어를 하여 전력변환 효율을 극대화 한다.