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하남수,천인국,홍인식 순천향대학교 부설 산업기술연구소 2000 순천향 산업기술연구소논문집 Vol.6 No.1
It is true that electronic cash make a reservation for future payment field. In this paper, electronic cash system was designed using FDD against IC card in web. The purpose of implementation was caused by a change of payment means. This electronic cash system is implemented and verified by FDD against IC card.
국외 친환경 근린단위 인증제도의 평가 항목별 점유율 분석
하남수(Ha Namsoo),서혜원(Seo Hyewon),최정만(Choi Jeongman),윤용상(Yoon Yongsang) 한국건축친환경설비학회 2013 한국건축친환경설비학회 논문집 Vol.7 No.2
Recently, reducing carbon emission has become a popular issue around the globe. Many developed countries adopted a system for building and evaluating a green cy which is not yet utilized in Korea. This research presents the basic framework for domestic adoption of eco-friendly authentication system by analyzing those in overseas, such as CASBEE, BREEAM and LEAD. In order to analyze different authentication systems in a consistent manner, the research consulted carbon reduction index classification system which indicates the carbon emission at city level. Going forward, findings from the carbon reduction index study can be employed as objective indicators for quantitative and qualitative perspectives. Domestic eco-friendly authentication system should be built based on this research, taking into consideration the proportional score awarded for each element as laid out above.
전광호,하남수,박준열,김상윤 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.2
The conventional PI control, that are used in the control loop for outer speed of the induction motor, also has difficulty dealing with the dynamic speed tracking, parameter variation, and the load disturbance. As a result, the motion control system operates with a poor performance in the motor´s low speed range. In this paper, a novel speed control system that implements the fuzzy logic controller(FLC) is proposed. The proposed FLC used the speed error, its rate of change, and the drive current as three fuzzy variables. The real command output current is chosen by the defuzzification of the fuzzy output extracted from the fuzzy control rules. The flux and the torque of the induction motor are estimated using the dynamic model with an excellent dynamic response over a wide speed range and with the rotor flux field-oriented scheme of the decoupling characteristics. The performance of this control system is substantiated by computer simulations.