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고장조건에 따른 지중송배전계통에서 공통접지의 영향 분석
임광식(Kwang-Sik Lim),이종범(Jong-Beom Lee) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
This paper describes that the effect on the other system is generated by the single line to ground fault of the underground transmission systems and distribution systems established the common ground in trefoil. Each system is modeled by EMTP/ATPDraw and the system carry out simulations according to the various values of common ground to analyse. In this study, the result of analysis based on simulation suggests protection method and ground system of each system.
임광식(kwang-Sik Lim),이종범(Jong-Boem Lee),정채균(Chae-Kyun Jung),강지원(Ji-Won Kang),박홍석(Hung-Sok Park) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.11
This paper is analysed by switching overvoltage on operating reclosing in 154[㎸] combined transmission systems. Combined transmission systems are modeled by EMTP/ATPDraw program. It is fault condition that simulate high resistance earth fault. The simulation is carried out considering variation of parameters such as resistance value of fault point and rate of underground line.
12주 유산소성 운동이 고령여성의 염증반응인자와 항염증반응인자에 미치는 영향
이광식(Lee Kwang-Sik),신호수(Shin Ho-Su),임백빈(Lim Baek-Vin) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.1
The purpose of this study was to verify the effect of 12weeks aerobic exercise on inflammatory factors(high sensitivity C-reactive protein; hs-CRP, Erythrocyte Sedimentation Rate; ESR, white blood cell; WBC, Fibrinogen) and anti-inflammatory factors(Adiponectin, tissue plasminogen activator; t-PA) in elderly women. The subjects were divided into two groups; exercise group(n=12), control group(n=12). In exercise group, line dance were performed 60minutes a day, 3 times a week during the 12weeks program. The results were as follows; First, in the exercise group, significant decreased on hs-CRP and fibrinogen after the training, also, significant difference found on hs-CRP compared to that of control group, however, tendency of decreased ESR and WBC showed but no significant differences on it. Second, there are significant increased on adiponectin in exercise groups, and it increased compared to that of control group. However, no significant changes on t-PA. Consequently, aerobic exercise was effect on improvement of both inflammatory factors and anti-inflammatory factors, so that it can be reduce the Coronary Artery Disease(CAD)-related risk in elderly women.
정광식(Kwang-Sik Jung),이종학(Jong-Hak Lee),김영완(Young-Wan Kim),라영은(Young-Eun Ra),전정익(Jung-Ik Jeon) 한국전기전자학회 2020 전기전자학회논문지 Vol.24 No.2
본 논문에서는 함정의 합내통신, 함외통신, 방송, 전화 등의 통합통신 안테나 중 함외통신용 UHF 대역 통합통신 안테나를 통합마스트에 탑재 가능한 평면형으로 설계했다. 제안된 통합마스트 탑재용 안테나는 해군의 한국형차기구축함(KDDX)에 적용되는 통합통신용 안테나로 작전능력, 생존성 강화와 운용성과 정비성의 향상 등 ‘복합경사’ 구조를 포함하는 최적화된 형태의 통합통신용 안테나이다. 기존 회전식 레이더와 다수의 모노폴 형태의 통신용 안테나를 마스트 외관에 불규칙한 형태로 부착된 형태에서 평판형 통합통신용 안테나를 포함하는 통합 마스트 형상으로 변경하여 레이더 반사 면적 지수(RCS)를 크게 낮추며 해외제품 대비 고이득 광대역 안테나를 개발목표로 한다. This paper, UHF band integrated communication antenna for ship communication is designed as a flat type that can be mounted on the integrated mast among integrated communication antennas such as integrated communication, ship communication, broadcasting, and telephone of the ship. The unified mast mounted antenna is an integrated communication antenna applied to the Navy’s KDDX, which is an optimized type of integrated communication antenna including a ‘composite slope’ structure including operational capability, survivability, and improved operability and maintainability. The existing rotary radar and a plurality of monopole-type communication antennas were changed from an irregularly attached shape to the mast exterior to an integrated mast shape including a flat-type integrated communication antenna. the radar reflection area index (RCS) is significantly lowered and compared to overseas products. The goal is to develop a gain broadband antenna.