프리즘 조명기구의 배광 메커니즘 모델링 및 최적화 기법의 적용 연구

최안섭,김철한 대한건축학회 2004 대한건축학회논문집 Vol.20 No.7

The dome pendant prismatic luminaire is recently used in commercial and industrial high-bay applications where quality light levels and energy savings are imperative. In addition, it is satisfied with various luminous intensity distrbutions as well as aesthetic designs. Despite these advantages, up to now, most of luminaire designers have only concentrated their attention on the design matters without optical consideration. Even if they know accurate optic a calculation process, it's difficult to produce prismatic luminaire with luminous intensity distribution required in a space, because the design process is made by much trial and error. The process is also required much time to design. μ-GA is one of the improved form of GA, which has been used to find an opimum solution, to reduce iteration and computing resources by using small populations. Therefore, the purpose of this study is to introduce candlepower distribution model of dome pendant prism luminaire and to develope a design algorithm that is able to find an optimum design solution of the luminaire using μ-GA.

광센서 조광제어시스템의 성능향상을 위한 조광용 전자식안정기 성능평가 연구

최안섭,정봉근 대한건축학회 2003 대한건축학회논문집 Vol.19 No.8

The daylight responsive dimming system, which uses daylight and automatically adjusts the light output of electric lighting according to the amount of daylight coming into the indoor luminous flux, a controller (including a control program) for initial calibration and dimming control of the system, and dimming electronic ballast for dimming electric lighting. This research has intended to improve accuracy of system performance by indicating the correlation between control voltage of a dimming electronic ballast and the resulting light output. The commercially available dimming electronic ballasts were tested. Then, through regression processes, the best-fitted equations were derived and compared to experiment results. The ratios of power consumption from different dimming level of electric lighting were measured. Based on such information, energy saving can be estimated when daylight responsive dimming system is applied.

광센서 조광제어시스템에서의 광센서 최적 방향성과 위치에 관한 평가 연구

최안섭,정근영 대한건축학회 2003 대한건축학회논문집 Vol.19 No.10

The purpose of this simulation study was to improve the performance of daylight responsive dimming systems. This simulation study was to analyze the followings. ⅰ) correlation between workplane illuminance and photosensor signal ⅱ) comparison between closed loop proportional and open loop proportional control algorithms in the daylight responssive dimming system. This study used DayDim as a simulation software and four different spatial characteristics of photosensors. Each photosensor has different spatial distributions in the existing photosensor, 0 degree, 30 degree, and 60 degree from nadir. Parameters such as sky condition, seasonal changes, azimuth, photosensor location, and different spatial distribution were considered. The results showed proper photosensor position and spatial distrubution determined by the various parameters.

주거공간의 건강조명시스템 개발 및 적용방안

최안섭,이정은,박병철 대한건축학회 2004 대한건축학회논문집 Vol.20 No.10

Quality of life is big issue recently Well-being, an idea of looking for healthy and wealthy body or mind in the basis of pro-health, pro-environment spirit, is going to be international trend instead of pursuing fortune and social position From this point of view, this paper investigated a meaning of light in the healthy environment and studied mental and physical effects of light sources, which ultimately affects luminous environment inn the residential areas This paper finally suggested well-coordinated lighting condition, derived from results of relationship between health and lighting, and demonstrated luminous environmental rendering simulation

공간구조와 보행량을 고려한 도시조명계획 방법론에 관한 연구

오은숙,김영욱,최안섭 대한건축학회 2003 대한건축학회논문집 Vol.19 No.10

As interests on illumination recently arise all over the world in the point of urban environmental view, people widely use illumination for urban environment as environmental art and making economical profits. In domestic, illumination widely takes part in improving the quality of night urban environment and attracting tourists. However, not like above intentions, since urban plan does not include urban illumination plan as a part and promotes it separately, we had to take the burden of economical loss and environmental quality deterioration. Consequently, this study analyzes space syntax and space using pattern objectively, and applied the Space Syntax Theory, which is used worldly for checking problems in planning, designing of existing cities, and buildings, in order to study the relationship with space characteristic factor and special factors in illumination plan, and then design illumination intensity estimation model through space syntax characteristic factors. Based on above results, this study suggests the methodology of illumination intensity plan using Space Syntax Theory for changes in space syntax or illumination plan for new cities in the future.

RADIANCE 프로그램과 인터넷 환경을 이용한 조명시뮬레이션 시스템 개발

송규동,김지현,최안섭 대한건축학회 2003 대한건축학회논문집 Vol.19 No.4

The prediction of illuminances from daylight and artificial lighting has been an important issue in the field of architecture. Architects traditionally have used scale models or various computer programs as tools for predicting the available illuminance in a building and for visualizing the overall lighting quality of the environment. The program requires accurate modeling of the geometric and photometric properties of a designed environment. RADIANCE is a program developed to aid lighting designers and architects by predicting the lighting levels and appearance of a space prior to construction of a building. The modeling of geometric property is usually conducted by commercially available CAD softwares. The modeling of photometric properties includes material color, texture and/or transmittance, daylight availability, and luminous intensity distribution of artificial light sources. The simulation itself uses backward ray-tracing technique to compute radiance values, which are typically arranged to form a photographic quality image. The purpose of this study is to develop a Radiance rendering system that operates automatically on the WWW environment.

탄력 밴드를 이용한 첫 번째 발허리발가락관절의 폄과 발목 발등굽힘의 증가가 발목관절 안정성에 미치는 효과

안나원(Na-Won An),이은창(Eun-Chang Lee),오재섭(Jae-Seop Oh) 한국임상움직임치료학회 2022 한국임상움직임치료학회지 Vol.2 No.2

Background It is known that ankle stability is required to maintain balance. However, metatarsophalangeal joint movement is related to ankle stability, there is no study that increases the first metatarsophalangeal joint extension and ankle dorsiflexion affect together in ankle stability. Objectives The purpose of this study was to determine the effect of an elastic band on ankle stability during one leg standing on an unstable surface. Methods A total of 12 healthy adult volunteers were recruited for this study. The total distance of the marker which presents the center of mass displacement was measured using the camera - Kinovea®. The difference between with and without an elastic band was analyzed using the paired t-test with p < 0.05 as the significant level. Results The total distance of the center of mass was significantly decreased (p < 0.001) when one leg standing on an unstable surface with an elastic band versus without an elastic band. Conclusions The present findings demonstrate that using an elastic band on the first metatarsophalangeal joint and the ankle improves ankle stability during one leg standing on an unstable surface in healthy adults.

Butterflies as an indicator group of riparian ecosystem assessment

An Jeong-Seop,최세웅 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1

Riparian ecosystems play an important role in modulating a range of ecosystem processes that affect aquatic and terrestrial organisms. Butterflies are a major herbivore in terrestrial ecosystems and are also common in riparian ecosystems. Since butterflies use plants for larval food and adult nectar sources in riparian ecosystems, butterfly diversity can be utilized to evaluate riparian ecosystems. We compiled butterfly data from 33 sites in three ri parian ecosystem types across the country and compared butterfly diversity in terms of number of species and quality index in relation to riparian environmental variables. Number of butterfly and plant species was not different among three riparian habitat types. Additionally, there was no significant ecological variable to distinguish the butterfly communities on three riparian habitats. Non-metric multi-dimensional scaling ordina tion showed that butterfly communities in three riparian ecosystem types differed from each other, and butterfly riparian quality index was the main variable for butterfly assemblages. Five indicator species for moor and another five species for riverine riparian ecosystems were identified. Three and one indicator species for moor and riparian ecosystems, respectively, were plant specialists, while 44 butterflies were general feeders, feeding on a wide range of hostplants in several habitats. These results suggest that butterfly species use actively riparian habitats for nectar and larval food, and the butterfly riparian quality index can be employed to track faunal change in riparian habitats, which are frequently threatened by disturbances such as water level and climate changes, and invasive species.

Crystal structure of the N-terminal domain of MinC dimerized <i>via</i> domain swapping

An, Jun Yop,Kim, Tae Gyun,Park, Kyoung Ryoung,Lee, Jung-Gyu,Youn, Hyung-Seop,Lee, Youngjin,Kang, Jung Youn,Kang, Gil Bu,Eom, Soo Hyun International Union of Crystallography 2013 Journal of synchrotron radiation Vol.20 No.6

<▼1><P>The crystal structure of <I>Eco</I>MinC<SUB>NTD</SUB> dimerized <I>via</I> domain swapping was solved at 2.3 Å resolution. The present study suggests that <I>Eco</I>MinC dimerizes through both <I>Eco</I>MinC<SUB>NTD</SUB> and <I>Eco</I>MinC<SUB>CTD</SUB>.</P></▼1><▼2><P>Proper cell division at the mid-site of gram-negative bacteria reflects critical regulation by the <I>min</I> system (MinC, MinD and MinE) of the cytokinetic Z ring, which is a polymer composed of FtsZ subunits. MinC and MinD act together to inhibit aberrantly positioned Z-ring formation. MinC consists of two domains: an N-terminal domain (MinC<SUB>NTD</SUB>), which interacts with FtsZ and inhibits FtsZ polymerization, and a C-terminal domain (MinC<SUB>CTD</SUB>), which interacts with MinD and inhibits the bundling of FtsZ filaments. These two domains reportedly function together, and both are essential for normal cell division. The full-length dimeric structure of MinC from <I>Thermotoga maritima</I> has been reported, and shows that MinC dimerization occurs <I>via</I> MinC<SUB>CTD</SUB>; MinC<SUB>NTD</SUB> is not involved in dimerization. Here the crystal structure of <I>Escherichia coli</I> MinC<SUB>NTD</SUB> (<I>Eco</I>MinC<SUB>NTD</SUB>) is reported. <I>Eco</I>MinC<SUB>NTD</SUB> forms a dimer <I>via</I> domain swapping between the first β strands in each subunit. It is therefore suggested that the dimerization of full-length <I>Eco</I>MinC occurs <I>via</I> both MinC<SUB>CTD</SUB> and MinC<SUB>NTD</SUB>, and that the dimerized <I>Eco</I>MinC<SUB>NTD</SUB> likely plays an important role in inhibiting aberrant Z-ring localization.</P></▼2>

Mock-up 실험을 통한 사무소 건축물의 Roller Shade 높이 제어 최적화에 관한 기초적 연구

임지선(Lim Ji-Sun),김유신(Kim Yu-Sin),최안섭(Choi An-Seop),이정호(Lee Jeong-Ho) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-

An inflow of daylight to the room offers comfortable view environment, psychological and physical security to people in the room and there are merits such as a work efficiency and energy saving. But. it has many problems as an excessive direct sunlight, cooling and heating. We can expect to have energy saving effect for illumination with comfortable view environment creation through control on height of roller shade. This study will be a used a fundamental approach to control on height of roller shade to changing daylight.