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부성환,임종환,허종철,김건훈 제주대학교 산업기술연구소 1999 尖端技術硏究所論文集 Vol.10 No.2
Torque generated by the blade of a wind turbine is a non-linear function of the wind velocity, the angular velocity of the rotor and the pitch angle. Glauert's theory for propellers, though widley used, is not suited to simulate the performance under variable wind speed and pitch angle. Furthermore, the numerical iteration procedure of the theory districts the applicability of a real time control of the wind turbine. We suggest a new method of modeling the torque that can be used in a real time control. Based on Glauert's theory, the power coefficient curve is estimated. In the vicinity of the operating point on the curve, a linearized model is extracted in terms of the wind velocity, the angular velocity and the pitch angle. the usefulness of the model is demonstrated with the results produced by sets of experiments.
HTS 증권 투자자 특성과 서비스품질 요인에 대한 연구
황용철,송영식,김관형,부성환 한국경영교육학회 2012 경영교육연구 Vol.27 No.5
Online financial environment changes brought about revolutionized the pattern of securities investors. First, customers products directly from the on-line if you sign up to an increase of interest on financial line-up is increasing. Second, the desire for convenience and safety than the importance of commissions have been increasing. Third, MTS(mobile trading system) of rapid growth. HTS service quality is a very important issue in online-securities trading. Accordingly, How to design the HTS service quality that can be changed to fit the needs of our customers should be examined in this study. For this purpose, A study was conducted to target the customers who use the HTS in nationwide. Test results, HTS service quality was composed of five factors. Safety and security - Customer services - Information reliability - Trading convenience - Trading convenience in order. 자본시장이 완전 개방된 이후 국제금융 위기로 다양한 변화를 보이고 있는 증권시장은 인터넷과 정보통신의 발달로 온라인 시장에서 괄목할 만한 성장세를 나타내고 있다. 이에 국내 온라인 증권시장의 특성을 살펴봄으로써 변화되고 있는 증권거래의 추세를 조명하고, 온라인 증권시장의 핵심 매체인 HTS의 서비스품질 요인의 추출을 통해 관련기업의 마케팅 전략에 도움을 주고자 한다. HTS 서비스품질은 연구 결과 안전보안성, 고객서비스, 정보신뢰성, 매매편의성, 디자인품질이 중요 요인으로 추출되었다. 또한 이들 요인들의 중요도는 기재된 순으로 영향력이 있었다.