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이병송,변윤섭,백광선 한국철도학회 1999 한국철도학회논문집 Vol.2 No.2
This paper presents the current-fed inverter of a TGV-K traction system with thyristor switches using phase control and commutation techniques. The current-fed inverters have two modes of operation which consist of forced commutation and natural commutation. In forced commutation mode, at speed of less than 120km/h, commutation is forced by means of the commutation capacitors and the thyristors. Above 120km/h, the thyristors operate in natural commutation mode. according to the voltages between phases of the motors. In this paper. the power conversion theory of the TGV-K traction system and the control principle of the converter and current-fed inverter are discussed.
이병송,윤태진 대한화학요법학회 1996 대한화학요법학회지 Vol.14 No.1
저자들은 fluconozole로 치료한 T. mentagrophytes에 의한 안면백선 1예를 경험하고 이를 문헉고찰과 함께 보고한다. Fluconazole is a triazole antifungal agent with a primarily fungistatic action in vitro. Its spectrum includes dermatophyte, filamentous, dimorphic and dermaticaceous fungi and some yeast species. Fluconazole inhibits the cytochrome P-450 dependent 14-demethylase (lanosterol N-demethylase), therefore inhibiting conversion of lanosterol to ergosterol. At low concentrations there is inhibition of the enzyme 14-demethylase and ergosterol synthesis, with an elevation in the ianosterol/ergostetrol ratio. At higher concentrations there is fungicidal activity with rapid fungal membrance damage. Fluconazole may also inhibits cytochrome C perixidative and oxidative enzymes, causing an increase in intercellular peroxide generation. Furthermore, there may be inhibition of transformation of candidal yeast forms to pseudohyphae. We experienced a patient with timea faciale caused by Trichophyton mentagrophytes. He was treated with fluconazole 150mg weekly for 3 weeks. After completion of therapy, skin lesions showed complete recovery and we could not see any laboratory abnormalities or adverse reactions.
이병송(Lee Byung-Song),정락교(Jeong Rag-Gyo),조홍식(Cho Hong-Shik),정상기(Chung Sang-Gi),김진선(Kim Jin-Sun) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper proposes an experimental study on the traction system of rubber tired AGT(Automated Guideway Transit). IGBT VVVF inverter is developed for 1C2M propulsion system of AGT, and it consists of inverter stack, gate control unit, control unit, and interface unit. The combination test was carried out to prove the performance of inverter, and test results show that the developed inverter is excellent.