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자외선 광 현미경 영상에서 밀도 기반의 피지 부위 검출 방법
김경록(Kyungrok Kim),탁윤식(Yoon-sik Tak),황인준(Eenjun Hwang) 한국정보과학회 2008 한국정보과학회 학술발표논문집 Vol.35 No.1
건강과 미용에 대한 관심은 IT 기술의 발전과 결합하여 유-헬스케어 산업의 부흥을 이끌고 있다. 특히, 향상된 디지털 영상 장비를 통한 각종 신체 정보 분석이 가능해짐에 따라 피부 자가 진단 시스템 등에 대한 연구 및 제품 출시가 활발히 이루어지고 있다. 본 논문에서는 이진 영상의 각 축에 대한 밀도 분석을 통해 특징점을 검출하는 방법을 소개하고 이를 토대로 자외선 광으로 촬영한 피부 현미경 영상에서 피지 부위를 자동 검출하는 기법을 제안하며 실험을 통하여 성능을 분석한다.
무기체계 운영유지비 산출을 통한 RAM-C 성장관리 연구
김경록(Kyungrok Kim),이기원(Kiwon Lee),정준(Jun Jeong),차종한(Jonghan Cha) 한국신뢰성학회 2021 신뢰성응용연구 Vol.21 No.2
Purpose: This study aims to realize RAM-C growth management by calculating the operation and maintenance costs of a weapon system. Methods: Considering the operation and maintenance costs of a weapon system to be the future estimates for the cost incurred in the operation and maintenance phase, the most appropriate simulation technique is applied. A simulation is designed to analyze the logistics of the weapon system based on the operation and maintenance concepts, and the outputs include the number of hours of operation and maintenance, spare part consumption, and ETC. The operation and maintenance costs are calculated by incorporating them in the formula for each item of the cost structure according to the corresponding simulation results. RAM-C growth management is analyzed for each stage of the weapon system design to ensure the maximum reliability and minimum cost. Results: RAM-C growth management of a weapon system can be examined by calculating the operation and maintenance costs through a simulation technique and hybrid model calculation method based on normalization Conclusion: The proposed method can facilitate the examination of RAM-C growth management in terms of the total life cycle cost, in contrast to the existing RAM growth management technique that is centered on the life/performance of weapon systems.
〈학술논문〉 가공 오차를 고려한 사이클로이드 치형 감속기의 각도 전달 오차에 대한 연구
김경록(Kyungrok Kim),홍일화(Ilhwa Hong),김영환(Younghwan Kim),임흥순(Heungsoon Lim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In this study, the angular transmission error(A.T.E.) for the reducer using cycloid gear was analyzed by consideration of the manufacturing error of main components. It was constructed that the analytic model of the A.T.E was based on equivalent spring system from the Hidaka's research. The manufacturing errors of the components were defined for the analysis. To obtain the defined variables, a measuring method of the manufacturing errors was presented and a geometrical method was defined to transform the measured data into input data. The ATE. of the reducer was estimated from the obtained variables using the method. In order to verify the analytic result, the A.T.E. was measured by an experimental method. As a result of comparison of both data, it was found that analytical and experimental results were similar in the error range of 10%.
사이클로이드 치형 감속기의 가공 및 조립 오차가 각도전달오차에 미치는 영향에 관한 연구
홍일화(Ilhwa Hong),김경록(Kyungrok Kim),김영환(Younghwan Kim),임흥순(Heungsoon Lim),정성현(SungHyun Jung) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.4
In this paper, parameters that have dominant effects on angular transmission error(A.T.E.) of reducer with cycloid tooth profile are identified, and reduction of the A.T.E. is experimentally confirmed by manufacturing error modification. For impact assessment of the A.T.E. on main components, series of the manufacturing errors are suggested and the A.T.E. is estimated in order to find dependent elements from equivalent analysis model. From the analytical result, we could make out that the A.T.E. is mainly caused by the manufacturing errors of hole and tooth profile in cycloid gear. It is also found that the A.T.E. is influenced by the assembly errors of hold flange and output shaft in carrier. It is experimentally verified that these influence factors have considerable effect on the A.T.E.
삼진 CMOS 컴팩모델을 기반으로 한 새로운 삼진 곱셈기 설계
강예성(Yesung Kang),김선민(Sunmin Kim),김경록(Kyungrok Kim),강석형(Seokhyeong Kang) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
Multiple-valued logic (MVL) has potential advantages for energy-efficient design by reducing a circuit complexity. Because of physical device and circuit realization issues, however, there are relatively small number of researches on MVL circuit designs. We design a novel ternary multiplier based on a ternary CMOS (T-CMOS) compact model. The proposed ternary multiplier design achieves significant total power reduction and performance improvement over conventional ternary design.