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Improved RRS Logical Architecture using Genetic Algorithm
심효섭,정재천,Shim, Hyo Sub,Jung, Jae Chun The Korean Society of Systems Engineering 2016 시스템엔지니어링학술지 Vol.12 No.2
An improved RRS (Reactor Regulating System) logic is implemented in this work using systems engineering approach along with GA (Genetic Algorithm) deemed as providing an optimal solution to a given system. The current system works desirably and has been contributed to the safe and stable NPP operation. However, during the ascent and decent section of the reactor power, the RRS output reveals a relatively high steady state error and the output also carries a considerable level of overshoot. In an attempt to consolidate conservatism and minimize the error, this research proposes applying genetic algorithm to RRS and suggests reconfiguring the system. Prior to the use of GA, reverse-engineering is implemented to build a Simulink-based RRS model and re-engineering is followed to apply the GA and to produce a newly-configured RRS generating an output that has a reduced steady state error and diminished overshoot level.
Diagnosis of Systemic Lupus Erythematosus During Medical Follow-up After Urinary Screening
윤소진,송지은,신재일,정일천,이재승,심효섭,정현주,Yoon, So-Jin,Song, Ji-Eun,Shin, Jae-Il,Jeong, Il-Cheon,Lee, Jae-Seung,Shim, Hyo-Sup,Jeong, Hyeon-Joo Korean Society of Pediatric Nephrology 2008 Childhood kidney diseases Vol.12 No.2
16세 여아가 학교 소변 검사에서 단백뇨와 현미경적 혈뇨가 나타났으며 신생검에서 감염 후 사구체 신염으로 추정되었다. 그러나 단백뇨는 안지오텐신 효소 억제제 치료에도 반응하지 않았다. 6개월 후 경부 림프절염이 나타났고 목 주위 림프절생검에서 아급성 괴사성 림프절염 소견을 보였다. 이후 2개월 후, 환아는 얼굴의 발진과 혈소판 감소증을 보였다. 재 신생검에서 루프스 신염 class IV 소견을 보였다. 환아는 충격 methylprednisolone(500 mg/일) 3일간 정주 후 경구 deflazacort로 유지하였으며, 이와 함께 cyclophosphamide(1 g/$m^2$)를 월 1회 정주 충격 요법을 6회 실시하였다. 이에 본 저자들은 학교 집단 요 검사 이상으로 추적검사 중 전신 홍반 루푸스로 진단이 되었던 증례를 보고하는 바이다. A 16-year-old girl presented with proteinuria and microscopic hematuria detected through mass urinary screening and was diagnosed as having suspected postinfectious glomerulonephritis by renal biopsy. However, heavy proteinuria did not respond to angiotensin converting enzyme inhibitor therapy. After 6 months, cervical lymphadenitis developed and a neck node biopsy showed subacute necrotizing lymphadenitis. After an additional 2 months, she developed facial erythema and thrombocytopenia. A repeat renal biopsy demonstrated lupus nephritis class IV. She was treated with pulse methylprednisolone(500 mg/day intravenously for 3 consecutive days) followed by oral deflazacort and monthly intravenous cyclophosphamide pulse(1 g/$m^2$) for 6 months. We report a case diagnosed as systemic lupus erythematosus(SLE) during medical follow-up after urinary screening.
권부길(Bu Kil, Kwon),반현석(Hyeon Seok, Ban),노용규(Yong Gyu, Noh),심효섭(Hyo Sub, Shim),이현준(Hyun Joon, Lee),박용선(Yong Sun, Park) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Hydrogen recirculation system composed of series connection of hydrogen blower and dual ejector is researched, which has high recirculation flux and fuel cell stack performance compared to parallel connection of hydrogen blower and single ejector. The series recirculation of hydrogen fuel in fuel cell stack bring on the performance improvements of fuel cell vehicles for stack endurance, consuming power, system weight, manufacturing cost, etc.
이상국 ( Sang Kook Lee ),이상훈 ( Sang Hoon Lee ),김송이 ( Song Yee Kim ),이우경 ( Woo Kyung Lee ),신동호 ( Dong Ho Shin ),방우대 ( Woo Dae Bang ),노송미 ( Song Mi Noh ),심효섭 ( Hyo Sup Shim ),박병훈 ( Byung Hoon Park ),이경종 ( 대한결핵 및 호흡기학회 2011 Tuberculosis and Respiratory Diseases Vol.70 No.2
We report a case of Caplan`s Syndrome, which presented as multiple pulmonary nodules. A 58-year-old male was admitted to hospital due to multiple pulmonary nodules. In addition, the patient presented with multiple arthritis, and dyspnea on exertion. Rheumatoid arthritis had been diagnosed 35 years ago. The patient had worked as a stonemason for 20 years. Computed Tomography (CT) revealed numerous well-defined tiny nodules scattered in both lungs, which was suspicious of miliary tuberculosis or malignancy. The patient was started on antituberculous medications and referred to our hospital. First, a transbronchial lung biopsy was performed, which showed no evidence of granuloma. It was our opinion that the biopsy was insufficient, and a follow-up video-associated thoracoscopy was performed. The pathological report determined necrotizing granulomatous inflammation and silicosis on background. According to imaging studies, pathologic reports, and clinical symptoms, we concluded that the patient had Caplan`s syndrome. We controlled his rheumatic medications, and instructed him to avoid exposure to hazardous dust.