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대응출력 150마력 및 240마력 터보차저 선박용 디젤기관의 동력성능 및 배출특성 비교에 관한 연구
이민형(Minhyoung Lee),정경철(Gyeongchul Jung),이기봉(Kibong Lee),이원욱(Wonuk Lee),이치우(Chiwoo Lee) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.4
This is a thesis about the experiment of comparison characteristic of power and exhaust gas in the same condition between diesel engine that is equipped turbocharger different from response power to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment with natural aspiration diesel engine and turbocharger diesel engine, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is much higher than the other one. In other hand, in exhaust gas experiment, turbocharger model exhausts more NOX and O₂, but it doesn’t significantly affect the result when it comes with decreasing of CO₂ and effectiveness of increased power characteristic. As a result, the turbocharger diesel engine is economically effective comparing with the natural aspiration diesel engine.
대응출력 200마력 선박용 과급기에 의한 디젤기관의 배출특성 연구
이기봉(Kibong Lee),이원욱(Wonuk Lee),이민형(Minhyoung Lee),이치우(Chiwoo Lee) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.11
This is a thesis about the experiment of comparison characteristic of exhaust gas in the same condition between diesel engine that is equipped response power 200HP turbocharger to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment with natural aspiration diesel engine and turbocharger diesel engine, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is much higher than the other one. In other hand, in exhaust gas experiment, turbocharger model exhausts more NOX and O2, but it doesn’t significantly affect the result when it comes with decreasing of CO2 and effectiveness of increased power characteristic. As a result, the turbocharger diesel engine is economically effective comparing with the natural aspiration diesel engine.
대응출력에 따른 선박용 과급기에 의한 디젤기관의 배출특성 비교 연구
이민형(Minhyoung Lee),이기봉(Kibong Lee),이원욱(Wonuk Lee),이치우(Chiwoo Lee) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.11
This is a thesis about the experiment of comparison characteristic of exhaust gas in the same condition between diesel engine that is equipped turbocharger to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment turbocharger diesel engine according to response power, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is almost the same in four turbocharger. In other hand, in exhaust gas experiment, high response power turbocharger model exhausts less NOX, but it doesn’t significantly affect the result when it comes with decreasing of CO2 and effectiveness of similar power characteristic. As a result, the high response power turbocharger diesel engine is economically effective comparing with the low response power turbocharger diesel engine.
신경회로망을 이용한 말벌 인식 및 분류와 양봉 환경 요소 이상 감지
김은총(Eunchong Kim),우예빈(Yebin Woo),이원욱(Wonuk Lee),한지수(Jisu Han),이인수(Insoo Lee) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.6
본 논문에서는 꿀벌, 장수말벌, 등검은말벌의 비행소리를 FFT(Fast fourier transform) 방법으로 변환하여 주파수 영역에서 분석하였다. 그리고 벌의 종류에 따라 다르게 나타나는 주파수 대역의 특징을 인공신경망에 적용하여 종류를 분류하도록 하였다. 그리고 꿀벌의 생장에 영향을 미치는 환경 요인 모니터링도 수행하였다. 본 연구를 통해 꿀벌을 위협하는 요소들을 효과적으로 감지 및 관리함으로써 양봉 농가의 꿀벌 개체수 보존과 수입 증대에 도움이 될 것으로 예상한다. In this paper, the buzzing sound of Honey bees, Asian giant hornets, and Asian predatory wasp was analyzed in the frequency domain with FFT (Fast fourier transform) method. In addition, the characteristics of the frequency which appear different to each other according to the species of bee were applied to the Artificial Neural Network to classify the kind of bees. This makes it possible to detect the appearance of wasps and handle the changes rapidly. Moreover, the monitoring of environmental factors affecting the growth of honeybees were conducted. it is expected that it will help bee farmers preserve the bee population and promote their income increase by effectively detecting and managing factors that threaten honeybees through this study.
윤성빈(Sungbin Youn),김도희(Dohee Kim),이원욱(Wonuk Lee),술탄 나미스(Sultan Namis ),홍영진(Young Jin Hong),최슬기(Sulgi Choi),이용선(Yongsun Lee),김시영(Ci Young Kim),서병무(Byoung-Moo Seo) 대한구순구개열학회 2023 대한구순구개열학회지 Vol.26 No.2
This case report described sequential processes of normalizing cleft deformities through three surgical procedures with time intervals. This report discussed the application of surgical methods applied at each stage. At the age of 7 months, surgery for a unilateral cleft lip was performed using the Fisher method, along with the closure of the hard palatal cleft using the Vomer flap. One year later, at one year and seven months of age, the remaining soft palatal closure was performed using the von Langenbeck method without lateral releasing incision. Simultaneously, corrective muscle realigning surgery was conducted to restore their direction and functionality. At age 8, corrective surgery addressed nasal deformity and asymmetric lip length, resulting in esthetic improvement.