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전반조명 기반 사용자 및 위치인식기술 적용 조명제어 시스템 제안 연구
박주일(Juil Park),이행우(Haengwoo Lee),서장후(Janghoo Seo),김용성(Yongseong Kim) 대한설비공학회 2015 설비공학 논문집 Vol.27 No.10
Studies for the reduction of lighting energy have been done using technologies such as user and location awareness. However, the focus of current research on location-based lighting control has been on energy reduction, which can lead to other issues including an imbalance in indoor illumination. This study proposes a lighting control system applying general illumination and technology for user and location awareness. The proposed lighting control system reduced lighting energy by 72.1%, 66.5% and 62.3% for 1, 2 and 3 users, respectively, compared to the On/Off lighting control system. This lighting control system causes an increase in lighting energy of 35.8% and 10.9% for 1 and 2 users compared to the lighting control system with user and location awareness, while a reduction of 9.4% was seen for 3 users. This means that the proposed system provides more effective energy reduction for a room with multiple occupants as it is based on the general lighting control scheme. The lighting control system applying general illumination and technology of user and location awareness improved the uniformity factor by 32.0%, 39.4% and 33.4% for 1, 2 and 3 users, respectively.
브릴루앙 산란실험을 이용한 단결정 PbMoO₄의 탄성계수 측정
박주일(Juil Park),이석목(Sukmock Lee),유윤식(Yun Sik Yu),김성철(Sung Chul Kim) 한국광학회 1996 한국광학회지 Vol.7 No.4
정방정계의 단결정인 PbMoO₄의 탄성특성을 조사하기 위하여 브릴루앙 산란 실험을 수행하였으며 모든 탄성계수 뿐만 아니라 복굴절(birefringence) 값도 결정할 수 있었다. 그 결과, c₁₁=111.4±4.4, c₁₂=64.7±3.4, c₄₄=27.0±0.8, c₁₃=51.9±2.5, c₃₃=95.5±1.9, c_(66)=34.5±4.6 그리고 c_(16)=15.8±1.2 (×10^9N/㎡)이었으며 n。-n_e=0.151±0.018 이었다. We have performed Brillouin scattering experiments to investigate the elastic properties of tetragonal symmetry single crystal PbMoO₄. and could determine the value of birefringence as well as the whole elastic constants. As a result, c₁₁= 111.4±4.4, c₁₂=64.7±3.4, c₄₄=27.0±0.8, c₁₃=51.9±2.5, c₃₃=95.5±1.9, c_(66)=34.5±4.6 and c_(16)=15.8±1.2 (×10^9 N/㎡) and n。-n_e=0.151±0.018.
브릴루앙 산란실험을 이용한 단결정 PbMoO₄의 탄성계수 측정
박주일,이석목,유윤식,김성칠 동의대학교 기초과학연구소 1997 基礎科學硏究論文集 Vol.7 No.1
We have performed Brillouin scattering experiments to investigate the elastic properties of tetragonal symmetry single crystal PbMoO₄. and could determine the value of birefringence as well as the whole elastic constants. As a result, c_11=111.4±4.4, c_12=64.7±3.4, c_44=27.0±0.8, c_13=51.9±2.5, c_33=95.5±1.9, c_66=34.5±4.6 and c_16=15.8±1.2 (×10^9 N/m²) and n_0-n_e=0.151±0.018 .