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퍼지 PI 제어기를 이용한 풍력/디젤 하이브리드 발전시스템의 품질제어
양수형,고정민,부창진,강민제,김정욱,김호찬 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.5
This paper proposes a modeling and controller design approach for a wind-diesel hybrid system including dump load. Wind turbine depends on nature such as wind speed. It causes power fluctuations of wind turbine. Excessive power fluctuation at stand-alone power grid is even worse than large-scale power grid. The proposed control scheme for power quality is fuzzy PI controller. This controller has advantages of PI and fuzzy controller. The proposed model is carried out by using Matlab/Simulink simulation program. In the simulation study, the proposed controller is compared with a conventional PI controller. Simulation results sho66w that the proposed controller is more effective against disturbances caused by wind speed and load variation than the PI controller, and thus it contributes to a better quality wind-diesel hybrid power system.
재난 회복력(Resilience)을 위한 기능성 게임(Serious Game) 활용가능성에 문헌 연구 - 2004년-2015년 관련 국내외 연구 동향 검토를 중심으로 -
양수형,이동진,이영웅,박현욱,이동규 위기관리 이론과 실천 2016 Crisisonomy Vol.12 No.12
국민안전처가 개발 주체가 되어 재난 피해자를 위한 재난심리 치료를 위해 기능성 게임을 제안하고 운영할 수 있을까? 재난 회복력을 위한 기능성 게임 활용 가능성에 대한 연구 사례는 찾아보기 힘들다. 이러한 가능성을 논의하기 위해 재난 회복력과 기능성 게임과 관련된 주제어 검색으로 나타난 선행 연구들이 그러한 가능성을 언급하고 있는지 또는 관련 선행 연구들이 서로의 활용 가능성을 고려하고 있는지를 논의하는 것이 우선될 필요가 있다고 판단했다. 이번 연구에서는 재난회복력과 기능성 게임의 기존 선행 연구 검토를 통해서 두 개념 사이의 개념적 또는 구조적 연관성을 접근하고자 노력하였다. 또한 기능성 게임이 재난 회복력을 위해 활용이 가능한지에 대한 문헌적 검토를 시도하였다. 연구 목적을 위해 재난 회복력과 기능성 게임에 관련된 주제어로 검색하여 범위를 한정하였다. 연구결과는 다음과 같다. 재난 회복력을 위한 심리지원으로 기능성 게임을 도입하는 것을 고려할 수 있다. 국민안전처 재난심리회복지원센터가 개발 주체가 되어 재난 피해자를 위한 재난심리 치료를 위해 기능성 게임을 제안하고 운영할 수 있다. Can the Ministry of Public Safety and Security in Korea propose and operate a “serious game” as post-disaster psychotherapy for disaster victims? Thanks to the industrial revolution, the green revolution, and the information revolution, humankind has enjoyed massive physical structures and residences and been connected via Internet, and now cannot imagine living without them. When the domain in which human, physical, and invisible elements are interwoven is exposed to a shock, the damage becomes much more serious compared to the case in which such connections are weak or non-existent. The Ministry of Public Safety and Security in Korea proclaimed that it should assume a central role in proposing and operating “serious game” for enhancing preparedness against natural disasters and treating disaster victims. The researchers reviewed the preceding studies focused on the disaster resilience and serious games in Korea and other countries.
HOMER 프로그램을 이용한 독립형 하이브리드 발전시스템 최적화
양수형(Yang Su-Hyun),부창진(Boo Chang-Jin),김호찬(Kim Ho-Chan) 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.2
Diesel fuel is expensive because transportation to remote areas adds extra cost, and it causes air pollution by engine exhaust. Providing a feasible economical and environmental solution to diesel generators is important. A hybrid system of renewable plants and diesel generators can benefit islands or other isolated communities and increase fuel savings. Renewable energy is, however, a natural source that produces a fluctuating power output. In this paper, hybrid power system of the marado lighthouse is proposed to supply stable power in the stand-alone hybrid power system. The proposed hybrid power system consists of the diesel generator, wind turbine, photovoltaic, fuel cell, and battery bank. To decrease the carbon emissions and find the optimization, the cost analysis of hybrid system is simulated using HOMER program and the optimized hybrid power system is designed.
감마선 조사가 기능성 식품 소재인 토사자의 휘발성 유기성분에 미치는 영향
양수형, 김경수 조선대학교 기초과학연구원 2008 조선자연과학논문집 Vol.1 No.2
This study was performed to examine the effect of γ-irradiation on the volatile organic compounds of Cuscutae Semen (Cuscuta chinensis L.). The volatile organic compounds of non-irradiated and 10 kGy γ-irradiated Cuscutae Semen were isolated using SDE apparatus and analyzed by GC/MS. Limonene, ethanol, (E)-2-decenal, hexadecanol, nonanoic acid and nonanal were detected as dominant compounds. Before irradiation, the total concentration of volatile organic compounds of Cuscutae Semen was approximately 189.90 mg/kg. After irradiation at 10 kGy, total concentrations increased to 299.46 mg/kg, but, the profile of volatile compounds including the essential oils of Cuscutae Semen was not differ from non- and irradiated sample. Therefore it was improved the extraction yield of useful compounds such as limonene, menthol, piperitone and isomenthone by irradiation.
외래내원여성의 유방암 조기검진행위에 영향을 미치는 요인
김영임,이창현,양수형,정혜선 지역사회간호학회 2004 지역사회간호학회지 Vol.15 No.1
Purpose: The purpose of this study was to identify factors affecting early detection behaviors of breast cancer such as breast self examination(BSE), breast physical examination, mammography. Method: The subjects were 141 women on an island and materials were collected through an organized questionnaire from March, to August 2002. The data were analyzed by using descriptive statistics, x2-test, and logistic analysis by SAS program. Results: 52.7% of the subjects performed breast self examination, 67.2% did breast physical examination and 67.7% did mammography. That is, about 60% of the subjects performed early detection behavior to find the breast cancer. Practice of breast self examination was significantly correlated with experience of physician examination and mammography. The most significant factor on BSE was a normal salted diet, and the most significant factor on physical examination and mammography was the high education level of subjects. Conclusions: According to the results of this study, it suggests that intensive education and information strategies for breast cancer early detection need to be developed. In particular, early detection programs for lower educated women should be activated. key words : Early detection behaviors of Breast Cancer, Breast self examination (BSE), Breast physical examination, Mammography