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철도차량에 적용된 리튬폴리머 2차 전지 안정성에 관한 연구
양용준(Y. J. Yang),정수영(S. Y. Jung),서덕용(D. Y. Seo) 한국도시철도학회 2014 한국도시철도학회논문집 Vol.2 No.2
Need that must be complemented problems such as corrosion by electrolyte leakage of the secondary battery nickel-cadmium that is applied to a railway vehicle to data and fault checking are not available due to a lack of protection circuit. Secondary battery is a component to maintain continually stable performance and supply power to the railway vehicle on an ongoing basis. Lithium-ion with superior performance in energy capacity and stable operating voltage than nickel cadmium that was used to existing railway vehicles, by comparing the lithium polymer secondary battery, I have applied the lithium polymer battery for the first time in railway vehicle. The lithium polymer battery which was applied to the railway vehicle has drawbacks of low-temperature characteristics and price compared to the lithium-ion battery, but it shows that the safety and reliability especially in the risk of explosion are relatively higher than the lithium-ion battery. In spot of the unreasonable aspects price, It has excellent performance stability, safety and maintainability and also has a strength that exceeds the price in terms of efficient. In addition, the lithium polymer battery has the BMS to prevent overcharge and over-discharge and then manage the battery. In sopt of the unreasonable aspects price, It has excellent performance stability, stability, safety and maintainability and also has a strength that exceeds the price in terms of efficient. In addition, the lithium polymer battery has the BSM, PCM to prevent overcharge and over-discharge and then manage the battery. Protection operation circuit is constituted by a system that constantly monitors the voltage, current, and temperature. Throughout the study, such as temperature change of battery cell due to the temperature rise in a scorching summer of the lithium polymer battery, discharge performance and the operation of the safety protection circuit in operation which are applied to urban railway vehicles of Seoul Metro was confirmed reliability and safety.
이명언(M.U. Lee),정수영(S.Y. Jung),권욱현(W.H. Kwon),최규하(G.H. Choe) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
고층빌딩에서는 여러 대의 엘리베이터를 두어 이러한 이동의 요구를 만족시키게 된다. 여러 대의 엘리베이터를 둔 시스템에서는 한 대의 엘리베이터 만 있는 시스템에서와 달리 여러 충에서의 이동요구를 효과적으로 여러 대의 엘리베이터에 분산해서 할당해 주는 기능이 필요하게 된다. 본 논문에서는 여러 대의 엘리베이터들을 보다 효과적으로 이용하여 승객의 대기 시간을 줄이기 위한 군 제어 방법 의 연구를 위한 군 제어 시스템을 수학적으로 모델 링 하였다. <br/>
중년 남성의 갱년기 증상 유・무에 따른 가족관계와 건강증진행위 비교
강민형,김소영,김하은,안상아,양혜지,이예지,이유진,정수영,최윤영,최지윤,신수진,이민경 이화여자대학교 간호과학대학 2017 이화간호학회지 Vol.- No.51
Purpose: The purpose of this study was to examine the difference of family relationship and health promoting behaviors between two groups depending on presence and absence of climacteric symptoms among middle-aged male. Methods: Samples of 220 men aged between 40 and 64 were recruited from metropolitan areas. The subjects responded to self-report questionnaires on general characteristics, climacteric symptoms, family relationship and health promoting behaviors. Data was collected from September 13, 2016 to September 30, 2016 and analyzed by using t-test, Pearson's correlation efficient, -test, frequency and percentage analysis. Result: In general characteristics of subjects, according to the presence or absence of climacteric symptoms, there were significant differences in occupation( =12.12, p=0.02), average monthly incom ( =11.01, p=0.01), and physical condition( =12.07, p=0.02). Mean scores of family relationship(t=-2.784, p=.008) and health promotion behaviors(t=3.629, p=.000) were significantly higher in climacteric symptom group. Significant positive correlation appeared between family relationship and health promoting behaviors in both presence(r=.493, p=.000) and absence group(r=.698, p=.000). But climacteric symptoms were in negative correlation with family relationship(r=-.187, p=.018) and health promoting behavior(r=-.233, p=.002) only in presence group. Conclusion: This study suggests that family relationship and health promoting behaviors should be considered in developing nursing intervention for climacteric middle–aged males.