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분산전원이 연계된 closed loop 배전계통에서 통신을 이용한 보호협조 알고리즘
서승용(Seung-Yong Seo),임일형(Il-Hyung Lim),최면송(Myeon-Song Choi),이승재(Seung-Jea Lee),추철민 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
본 논문은 분산전원이 연계된 closed loop 배전계통에서의 통신을 이용한 보호협조 알고리즘을 제안하고 있다. 배전계통에 신재생에너지의 연계에 따른 새로운 계통 운영방식에 대한 연구가 진행되고 있다. 이에 따라서 기존의 radial 구조에 분산전원 연계된 형태와 경우에 따라 분산전원 연계된 closed loop 형태의 배전계통운전이 고려되고 있다. 새로운 형태의 배전계통을 운영하기 위해서는 보호협조에 대한 문제가 해결되지 않고서는 계통을 안정적으로 운영할 수 없다. 따라서 본 논문에서는 분산전원이 연계된 closed loop 계통 구조에서의 통신을 이용한 보호협조 알고리즘을 제안하여 향후 배전계통 운영에 대한 통신을 이용한 보호협조 알고리즘을 제안하고자 한다. 또한 실 계통에의 적용을 위해 차단기 이상인 경우와 통신 상태에 이상이 있는 경우에 있어서도 후비보호가 가능한 알고리즘을 제안한다. 제안한 알고리즘은 Matlab Simulink를 이용하여 검증하였다.
은재순,서승용 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.12
Sesquiterpene pyridine alkaloids were isolated mainly from plants of the genus Tripterygium (Celastraceae) which have been used traditionally in Chinese medicine. These compounds have polyhydroxy dihydro-β-agarofuran core and esterifying substituent with dilactone bridges, and recently demonstrated promising anti-HIV activity. We have achieved the synthesis of hydroxy wilfordic acid and its ester via asymmetric cyanosilylation. With a NMR study of (S)- and (R)-PGME (phenylglycine methyl ester) amide, the tertiary alcohol stereochemistry of synthetic hydroxyl wilfordic acids was determined. Our synthetic approach will provide a contribution to the synthesis of sesquiterpene pyridine alkaloids and the development of their analogs for anti-HIV activity.
송준영,정현균,서승용,장현호,Song, June-Young,Jung, Heun-Guyn,Seo, Seung-Yong,Jang, Hyun-Ho 대한미세수술학회 2005 Archives of reconstructive microsurgery Vol.14 No.1
Purpose: We analyzed the result of the radial forearm island flap for the reconstruction of amputated fingers. Materials and Methods: From March 2001 to February 2004, we assessed two patients who could not be able to receive replantation and six patients who had necrosis of the fingers after replantation. There were six men and two women. The mean age was 42 years. The average duration of follow-up was 26months. Results: All flaps were survived. Two patients needed bone graft. Two patients needed curettage due to osteomyelitis. All patients needed fat reduction procedure. No patients needed amputation of reconstructed digit due to complication. Conclusion: Radial forearm island flap seems useful operation procedure for severely amputated digit or necrotized digit after replantation.
연부조직 결손을 동반한 감염성 경골 불유합 및 골결손의 치료(유리피판술과 동시에 시행한 Ilizarov기구를 이용한 골연장술의 유용성)
송준영,정현균,서승용,장현호,Song, June-Young,Jung, Heun-Guyn,Seo, Seung-Yong,Jang, Hyun-Ho 대한미세수술학회 2005 Archives of reconstructive microsurgery Vol.14 No.1
Purpose: The purpose of this study was to evaluate the effectiveness of internal transport using Ilizarov apparatus with free flap surgery for infected tibial nonunion. Materials and Methods: We reviewed 8 patients of infected tibial nonunion treated with internal transport using Ilizarov apparatus and free flap surgery. Seven of eight patients were available for at least 1 year follow-up. All patients were male. The mean age at the time of the surgery was All fractures were Gustilo's type III B open fracture. The mean length of the bone defect was 8.5 cm. All used flaps for covering the soft tissue defect were free rectus abdominis muscle flap. We evaluated bone and functional results with use of the Paley and Catagni's classification. And we classified the complication with use of the Paley's classification. Results: Acceptable length and solid union of bone was achieved in all cases. The mean size of the bone length was 7.2 cm. The mean healing index was 69.5 days/cm. All but one case needed bone graft at docking site. All flaps were survived. There was no recurrence of infection. According to Paley and Catagni's classification, all cases showed excellent or good results. Complications were pin tract infection in 3 cases, persistent pain in 2 cases and limitation of joint motion in 2 cases. Conclusion: Simultaneous free-tissue transfer and Ilizarov distraction osteogenesis was thought to be an attractive treatment modality for infected nonunion of the tibia.
Yuan Yue,서승용,은재순,이미경 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.2
A multifunctional dendritic nanodevice containing folate (FA) as the targeting molecule and daunorubicin (DNR) as the chemotherapeutic drug has been designed and synthesized. The primary amino groups on the surface of the generation 5 poly(amidoamine) dendrimer (G5 dendrimer) were acetylated partially. FA and DNR were conjugated to the remaining primary amino groups on the G5 dendrimer through amide and ester linkage, respectively, to generate the difunctional dendritic device. The synthetic approach of G5 PAMAM dendrimer containing daunorubicin and folic acid would be useful for targeting the overexpressed membrance-associated folate receptors of KB human carcinoma cell line and discreating them effectively.