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- 저자 : 이용환(Lee, Yong Hwan) (검색결과 777 건)
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이용환,Lee, Yong-Hwan 대한예방의학회 1989 예방의학회지 Vol.22 No.3
In order to evaluate the noisy environment and hearing loss of workers served in noisy working environment, the author investigated 212 manufacturing industries located in Ulsan Industrial District that could be observed for 3 successive years from 1986 to 1988. The obtained results were as follows: 1. There was increased tendency in the number of workers served in noisy working environment and that of examined of hearing loss for three years. 2. In the noise level of working environment, the number of industries less than 89dB(A) was increased every year, while more than 90dB(A) was in decreasing tendency. 3. Mean hearing loss by frequency was the most prominent in 4,000Hz, the level of hearing loss was in increasing tendency yearly, and that of left eat was higher than right ear in almost all type of industry. 4. In 1986, the level of hearing loss by type of industry was highest in manufacture of electric and electronic, and followed by paper and plywood, and metal products in right ear: that was in the order of manufacture of electric and electronic, metal products and textile products in left ear. In 1987, that was in the order of manufacture of metal products, machinery and others in right ear, and metal products, machinery and food stuff in left ear in 1988, manufacture of others, food stuff and machinery in both ear. 5. In hearing loss by service duration, right ear of 5-9 years group was higher than that of less than 5 years in 1987, whereas in 1988, the longer in service duration, the higher in the level of hearing loss in both ear. 6. In 1986, 1987 and 1988, the prevalence rate of noise-induced hearing loss were showed increasing tendency as 0.4% ,0.8% and 1.5% , respectively, and manufacture of textile products was highest(1.0%) in 1986, machinery(1.2%) in 1987 and others(2.8%) in 1988. 7. The proportion of grade E in early loss index were 76.1% (1986), 78.2% (1987) and 80.5% (1988) in left ear, 75.9% (1986), 76.4% (1987) and 75.9% (1988) in right ear.
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이용환,K.W. Park,S.J. Kang,C.I. Yeo,J.B. Kim,E.K. Kang,송영민,Y.T. Lee 한국물리학회 2015 Current Applied Physics Vol.15 No.11
We present flexible thin-film GaAs solar cells fabricated on thermoplastic substrates by a low-pressure cold-welding and epitaxial lift-off process. The use of polyethylene terephthalate (PET) film as a flexible substrate enables cold welding (130 ℃) of gold layers between a thin-film GaAs solar cell and PET film with very low mechanical pressure (0.4 MPa), due to their thermoplastic properties. The feasibility of the proposed technique was demonstrated by fabricating GaAs single junction solar cells (without antireflection coating) on PET film, having an efficiency of 13.2%. The fabricated solar cell also showed a stable performance after 2000 cycles of bending.
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창의적 융합교육에 의한 교육환경 공간 변화에 관한 연구 - 창의성 촉발의 탈중심적 및 사건적 공간을 중심으로 -
이용환,Lee, Yong-Hwan 한국교육녹색환경연구원 2015 교육·녹색환경연구 Vol.14 No.2
본 연구는 시대적으로 글로벌 지식기반 사회가 정착되면서 학교를 중심으로 하는 교육정책 영역은 다양성과 자율성을 보장하게 되고 모방형 인재가 아닌 미래성장 동력인 창조적 인적자본의 육성을 절실히 필요하게 되었다. 그러나 현재 한국의 교육환경은 여전히 입시교육 위주의 지필평가를 위한 교육정책과 학생들의 흥미나 즐거움을 유발하지 못하는 학교교육으로 인해 창의적 인재를 양성해야하는 글로벌 지식사회에 대응하지 못하는 상황에 직면하고 있다. 이를 극복하기 위한 2015 개정 교육과정은 물론 자유학기제 등을 강조하는 교육정책과 더불어 학교는 창의적 융합교육 환경을 조성해야할 시점이다. 본 연구의 목적은 미래지식사회에 상호 관계적 연계성을 중요시하는 특성과 포스트모더니즘이후 현대철학 사상에 나타난 인간에 대한 탈중심적 사유를 통한 창의성 촉발을 중요한 생성론적 특징으로 언급한 철학자 질 들뢰즈의 교육과 공간담론의 개념적 사유로 창의적 교육공간 특성을 이해하고 서로의 상호 연관관계를 드러내고 있다. 그러므로 현대 구조주의적 사상을 근본으로 하는 현대 철학적 사유를 통한 창의적 학교는 구성원들의 탈중심적인 협력 중점의 융합적 교육과정 및 학교 운영의 자율성이 중심이 되는 창의성 교육환경, 즉 환경공간의 속성으로서 다변화적 지원공간, 유동적 실외공간, 연계적 중심공간, 사건적 상황에 따른 다양한 종류 및 규모 공간, 개방적 공간 및 융합적 공간이 다양한 교육공간 요소와 함께 구성되어짐을 볼 수 있다. This study is currently presenting a creative education policy through the new 2015 revised curriculum and the Free semester system of Middle School as part of the education policy reform in the government-led, high freedom grade in each regional school board first, emotional schools, friendly school, campus type schools, etc. with creative thinking and improve students' autonomous judgment with the psychological and political reasons meant to provide amusement and certainty of their career choice. This creates space for creative education through the theoretical understanding of the educational philosophical thinking on creativity was to identify the appropriate means of educational space. The purpose of this study was to extract the linkage to produce creative educational environment that is generated through the philosophical thinking of the historical and psychological analysis of creativity with a human being. Future school construction has a future-oriented task should create a creative learning space in the center of the member schools. This creates space for creative education through the theoretical understanding of the educational philosophical thinking on creativity was to identify the appropriate means of educational space. Therefore Philosophical Thinking Creative School of members through the grounds centric collaboration focused on convergence enemy curriculum and school creative autonomy of operation which is central educational environment, that is diversified assistance as an attribute of the environment, space, space, flexible outdoor space, linking enemy center space, different types and sizes of the space case situation, the open space and spatial fusion can be seen the configuration doeeojim with different training space element.
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영상의 위치 정보를 위한 임베디드 지오코딩 시스템 구현
이용환,김영섭,Lee, Yong-Hwan,Kim, Young-Seop 한국반도체디스플레이기술학회 2008 반도체디스플레이기술학회지 Vol.7 No.3
Geo-coding refers to the process of associating data with location information, and the system deals with geographic identifiers expressed as latitude and longitude or street addresses. Although many services have been launched, there still remains a problem for users to create geo-coded photo with manually labeling GPS(Global Positioning System) coordinate or synchronizing with separate devices. In this paper, we design and implement a geo-coding system which utilizes the time and location information embedded in digital photographs in order to automatically categorize a personal photo collection. An included GPS receiver labels a photograph with its corresponding GPS coordinates, and the position of the camera is automatically recorded into the photo image header at the moment of capture. The place and time where the photo was taken allows us to provide context metadata on the management and retrieval of information.
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