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김효인(Kim Hyoin),윤근영(Yun Geun Young) 한국건축친환경설비학회 2011 한국건축친환경설비학회 학술발표대회 논문집 Vol.2011 No.3
Lighting load for the rise of indoor illuminance level has been increased recently, and occupant behaviour occurs a large energy deviation. This study aims to investigate the lighting conditions, lighting use patterns, and their relationship. The field measurement was implemented in three offices from June 1 to August 31. External and indoor illuminances, and the use of lighting were monitored at 10 minute intervals. The results of the field measurement reveal the illuminance on workplane and lighting use patterns by occupants. This study demonstrate that occupants use artificial lighting more than 93% during occupied period, and the lighting use pattern in the monitored offices is not statistically related to external illuminances. Therefore, it is important to analyse occupants' behaviour patterns in order to reduce excessive lighting energy consumption.
광원의 파장 분포와 조도에 따른 시환경의 주관적 반응 평가 및 건물에너지 소비
김효인(Hyoin Kim),윤근영(Geun Young Yun) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.6
This study aims to reveal occupant's the subjective response in accordance to the illuminance, SPD and control range of lighting and reduce the energy consumption of a building by maintaining the quality of visual environment. The experiment was carried out to investigate overall evaluation, preference, atmosphere, satisfaction of the different visual environment. The building simulation tool, DesignBuilder, was used to estimate the building energy consumption. The evaluation score was higher under the highest SPD condition(636nm) compare to the low SPD condition (453nm). If the illuminance was 573lx or above under the highest SPD conditions, the results were similar to the existing lighting system, a fluorescent lamp, is used, or a higher score. In conclusion, when the visual comfort conditions(SPD peak of 636nm, illuminance 573lx) is applied, 10% of building energy consumption could be reduced compare to the existing lighting system.
상용트럭 탑승부 내 열적 쾌적성 평가를 통한 펠티어 냉·난방 장치 적용 가능성 평가
김효인(Hyoin Kim),이정희(Junghee Lee),윤여빈(Yubin Yoon),조용석(Yongseok Cho) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Thermalcomfort for car occupants is important factor for automotive design. And virtual simulation of passenger compartment climatic condition is becoming increasingly important for reducing the vehicle development time and cost. This study is concerned with peltier air-conditioning system. It is suitable for hybrid commercial vehicle because it uses only electric energy. In the present study, we used test data to validate thermal comfort analysis for a commercial vehicle cabinroom environment. Human model uses 21 body segments and each segment is modeled as multiple body layers(core, muscle, fat, and skin tissues) and a clothing layer. The combination of CFD with radtherm-human comfort analysis allows for the assessment of thermal comfort in the cabinroom as in a quick and inexpensive manner.
친환경 자동차 배터리용 출력 시험기의 냉각성능 개선을 위한 수치해석 연구
김효인(Hyoin Kim),윤여빈(Yubin Yoon),조용석(Yongseok Cho) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Storage of electrical energy is the most critical aspect of electric power used vehicle. Therefore an exact knowledge of the behavior of the battery and temperature and further electrical storage elements is mandatory. In this paper an effort is made to optimize a fan-driven air-cooling system for the power tester. The objective of the design was maintaining the power tester in their desired operating temperature range with a near uniform temperature. Computational Fluid Dynamic(CFD) analysis was performed using ANSYS to develop the power tester and multiple design iterations were made to improve the base design. Using simulation based design and optimization, significant improvements were made in the power tester’s cooling performance from the base design.
빛의 파장별 분포 및 밝기에 따른 재실자의 주관적 반응 평가
김효인(Kim Hyoin),이사라(Lee Sara),윤근영(Yun Geun-Young) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)
This study aims to reveal influence of illuminance and spectral power distribution(SPD) of lighting on occupant’s subjective response. The experiment was carried out to investigate overall evaluation, preference, mood, satisfaction for each visual environment through questionnaire survey. The subjective evaluation was conducted in mock-up room which is able to control the different visual environment for illuminance and SPD. The results indicate that subjects did not recognize the difference of ‘brightness of room’ and ‘brightness of lighting’ under the same illuminance level although SPD was difference, but imply that they preferred the lighting with the highest SPD peak of 636㎚ to that with the highest SPD peak of 453㎚.
최종대(Choi Jong-Dae),김효인(Kim Hyoin),윤근영(Yun Geun-Young) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.4
Recently, from a saving energy and environmental lighting sources point of view, using LED lighting have been increased rapidly. The colors of light was applied to the control of dimmers that is composed of red, green, blue, and white(RGBW) to improve the quality of visual environment. Moreover this study has been processed to develop adjustable dynamic LED lighting system on SPD and definitize the various spectral power distribution and color temperature of light through the control of the four dimmers. It is possible to combine up to 432⁴ kinds of light. Measurement of illuminance of range on working surface was as 7~1,831 lux. Application of visual environment for occupants can be expected according to control of lighting performance.
드론 촬영물에서의 개인정보 보호를 위한 AI 기반 마스킹 서비스
신다연 ( Dayeon Shin ),김효인 ( Hyoin Kim ),류혜원 ( Hyewon Ryu ),이시영 ( Siyoung Lee ),김명주 ( Myungjoo Kim ) 한국정보처리학회 2020 한국정보처리학회 학술대회논문집 Vol.27 No.2
최근 드론 산업은 미래를 이끌어갈 신산업으로 부상하고 있다. 이러한 기대에도 불구하고 드론으로 인해 생기는 여러 문제들 중에서 개인정보침해 관련 문제는 기술적으로 쉽게 풀리지 않아서 드론 사용에 대한 법적인 규제만 더 강화하고 있는 실정이다. 본 논문은 드론 촬영물이 묵시적으로 가지고 있는 개인정보 침해문제를 클라우드 환경 가운데 기술적으로 풀어내었다. 사용자는 자신의 개인정보 침해 요소가 제거된 안전한 영상을 이용할 수 있도록 실시간 촬영 시 특정 사람 객체에 대한 마스킹을 진행할 수 있다. 라즈베리파이 카메라와 드론을 이용해 동영상을 촬영한 뒤 소켓 통신을 통해 이를 클라우드 환경에서의 서버로 전송하면 서버는 실시간으로 마스킹 처리를 진행하며 마스킹이 완료된 영상은 최종적으로 서버에 저장된다. 사용자는 모든 사람 객체 마스킹과 특정인을 제외한 모든 사람 객체 마스킹이라는 두 가지 옵션 중에서 원하는 옵션을 선택하여 개인정보 마스킹 처리를 진행할 수 있다.