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홍경한,전상신,이승재,박찬수,권일욱,김재열,김병철,하옥남 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.4
Fin-tube type(Fin-type) heat exchanger has been tested in order to replace the heat exchanger of parallel flow type(P.F-type) which is now widly used in automobile air conditioning system. The following conclusions are drawn by the comparison of the characteristics of the heat exchangers. Evaporator and condenser capacities and COP(Coefficience of performance) were varied as with the compressor speed, outdoor air temperature and air flow rate changed, which much influenced on the characteristics of the air conditioning system. Evaporator and condenser capacities were increased with increasing compressor speed and outdoor air temperature. Evaporator and condenser pressures of Fin- type were decreased by 7% and 5% respectively compared with those of P.F-type. The COP of Fin-type was decreased with increasing outdoor air temperature and compressor speed. The COP of P.F-type was decreased by 14% compared with that of Fin-type.
칭찬활동 프로그램이 청소년의 희망과 자아존중감에 미치는 효과
김혜숙,민순,박종,김경미,하윤주,김은아,정선주 韓國學校保健學會 2009 韓國學校保健學會誌 Vol.22 No.2
Purpose: The purpose of this research is to investigate the effect of the praising activity program on hope and self-esteem of adolescents. Methods: From Jan 26th to 29th 2009. 193 of subjects were participated in investigation in G city. After 4 days of data collecting in praising activity program, research is the pre and post similarity test to investigate hope and self-esteem of adolescents. Results: The average hope score of adolescents significantly increase from 3.39 before the program to 3.60 after the program. The average self.esteem score of adolescents significantly increased(p<.00l) from 3.01 before the program to 3.15 after the program. From the resuits. the program showed that it has significant effect on hope and self-esteem of adolescents. Conclusion: The praising activity program as an affirmative mass psychological program is confirmed that it affects on hope and self-esteem. Therefore. it is expected to be utilized as promotion of health program for adolescents.
이경숙 ( Kyoung Sook Lee ),정재운 ( Jae Woon Jung ),최동호 ( Dong Ho Choi ),윤광식 ( Kwang Sik Yoon ),최우정 ( Woo Jung Choi ),최수명 ( Soo Myung Choi ),임상선 ( Sang Sun Lim ),박하나 ( Ha Na Park ),임병진 ( Byung Jin Lim ),최강원 한국물환경학회 2011 한국물환경학회지 Vol.27 No.6
A five-year field monitoring was conducted to monitor characteristics of suspended solid (SS) export from paddy fields. The observed EMCs of SS ranged 1.2~517 mg/L (avg. 52.1 mg/L) during storm period. The concentration of SS during non-storm period were 1.1~349.5 mg/L (avg. 36.1 mg/L). Monthly load of SS was high during summer when rainfall amount was high. The load was higher than that of May when tillage effect is expected. There was no significant relationship between SS EMCs and rainfall or drainage amount. However, effects of rainfall and drainage were found to be significant for event load of SS. But, there was no apparent relationship between rainfall amount of cropping period and load of SS for that period. The observed SS load was 164.8~456.0 kg/ha (avg. 301.2 kg/ha) and mostly occurred during storm period. This study results also suggested that SS load estimation by USLE equation for paddy field could be overestimated, if not carefully handled. Monitoring studies for various climate, soil, and agricultural management are required to get better scope of SS export from paddy fields.