• 태양에너지
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• 제18권4호
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• pp.67-75
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• 1998

Daylight illuminance are always changing. Nevertheless, when the energy savings due to daylight are calculated an accurate estimate of daylight availability is required. Where artificial lighting is photoelectrically controlled the relevant quantity is the cumulative distribution of daylight illuminance. This paper describes an experiment which measured daylight illuminance over one whole working year. Also using measured data on availability of daylight, equations are drived to predict the maximum possible savings from photoelectric controls for an interior lighting installation. The equations are applied to a space as a worked example and figures are given for the relative maximum savings in artificial lighting use of three control systems: on/off, dimming and mixed.

• 한국측량학회지
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• 제25권2호
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• pp.165-175
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• 2007

오늘날 도시공간에 건축되는 건축물은 건물사이 공간을 크게 확보하여 건물내부에 충분한 일광을 얻도록 노력하고 있으며, 건물의 일조량은 건물의 높이뿐만 아니라 건물간의 간격이 매우 중요하다. 하지만 오늘날 고밀도 개발로 인하여 건물사이 간격을 충분하게 확보할 수 없고 쾌적한 거주환경에 대한 요구가 강해지면서 일조권 분쟁이 증가되고 있다. 따라서 본 연구에서는 LiDAR 자료와 수치지도를 연계하여 3차원 국토정보를 구축한 후 일조권분석에 적용하여 다음과 같은 결론을 얻었다. 태양의 고도와 방위각을 이용하고 3차원 도시공간을 정확하게 시뮬레이션하여 각각의 세대별 일조권을 총 일조시간과 연속 일조시간으로 구분하여 정량적으로 분석함으로서 일조권 침해 여부를 보다 정밀하게 판단할 수 있는 방법을 제시하였다. 3차원 국토정보를 이용한 일조권분석방법은 지자체에서 도시계획 및 건축 인허가 업무를 수행할 때 보다 정확한 자료를 제공하여 줄 것으로 판단된다.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제29권1호
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• pp.29-42
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• 2023

Purpose: This study aimed to develop a daylighting design indicator for Korean dementia nursing homes based on the therapeutic effects of light, focusing on the serious aging index facing Korea and the importance of natural light that occupies the most important position in the therapeutic environments for the elderly with dementia. Methods: A wide range of literature-oriented research methods were mobilized to develop the daylighting design indicator of Korean dementia nursing homes. Results: The daylighting design indicator of Korean dementia nursing homes was derived from three perspectives: maximizing daylight availability, optimizing therapeutic view, and minimizing glare. In addition, eighteen basic indicators were derived within seven indicator items in the range of building layout, windows, glazing, shading devices, spaces, interior finishings, and daylight factor. Implications: The daylighting design indicator of Korean dementia nursing homes revealed in this study will contribute to realizing Korean dementia nursing homes as a therapeutic environment for the elderly with dementia.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제28권4호
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• pp.71-87
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• 2022

Purpose: This study examines the daylighting design factors of Korean dementia nursing homes, in order to realize a therapeutic environment based on the therapeutic effect of light in the rapidly aging trend with an huge increase in the population of dementia in Korea. Methods: Through literature reviews, this study aims to theoretically examine the therapeutic light environment for the elderly with dementia, derive daylighting design factors of Korean dementia nursing homes, and analyze their detailed design factors. Results: The result of this study can be summarized into two points. The first one is that the daylighting design factors reflected in dementia nursing homes are derived into six factors: building layout, windows, glazing, shading devices, spaces, and interior finishings that determine the availability of daylight. The second one is that the detailed daylighting design factors are shown as primary and secondary detailed design factors, and the main values to be considered when applying these factors into dementia nursing homes are analyzed as maximizing daylight availability, optimization of the possibility of therapeutic view, and anti-glare. Implications: The daylighting design factors will contribute to maximizing the availability of daylight, optimizing the possibility of view, and minimizing the glare in the living spaces of dementia nursing homes in Korea.

• 한국태양에너지학회 논문집
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• 제36권6호
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• pp.37-46
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• 2016

In this study, long-term global illuminance data for 19 selected cities are calculated from modeled solar radiation data, AEER's TMY2. Perez model in Daysim daylight simulation tool is used for the solar radiation to illuminance conversion. And then, daylight availability in an unit office space is evaluated for the 19 cities. For this evaluation, various daylight performance indices are reviewed since static daylight performance index such as daylight factor (DF) and annual average global illuminance value is not suitable for actual performance evaluation in terms of visual comfort and light energy saving of a space. This study evaluated daylighting performance of prototypical office space module by introducing DA (daylight autonomy) and UDI (Useful Daylight Illuminance) index for major cities of Korea. Result shows that there is upto 18% of illuminance level difference with annual average global illuminance data, but if we consider useful daylight in a space the illuminance level difference among the cities are only within 5%. This means that for sustainable building design especially in daylight design, amount of annual global illuminance is not important factor even in cloudy cities. Daylight design and daylight harvesting system would return similar energy saving impact regardless of building location.

• KIEAE Journal
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• 제12권2호
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• pp.39-44
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• 2012

The children's playgrounds have been installed almost from the beginning when the first apartment complex was built. The brightness of a playground has not been considered in the architectural plan. The site of the playground has been chosen based on availability without making a detailed review on its daylight environment. The purpose of this study is to provide the Sky Ratio Diagram for the evaluation of daylight environment at the children's playground in apartment complexes. the Sky Ratio Diagram has 100 points, each point has a value of equal to the sky ratio 1%. Through case studies, the Sky Ratio Diagram was verified whether it could be practically applied to the actual playgrounds. This research is meaningful in that it suggests a way to quantitatively evaluate the brightness of a playground. The Sky Ratio Diagram suggested in this study can be practically used when choosing a site for a playground within an apartment complex.

• KIEAE Journal
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• 제2권3호
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• pp.17-24
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• 2002

For sustainable building design, using day lighting is considered a variable technique to save energy and create comfort indoor environments. Specially, the lightself as a integrated daylighting system is one of the most important techniques due to it's durability, availability and lighting performance. This paper aims to analyze the development and architectural application of a lightself system to buildings as a integrated day lighting system. For the study, advanced lightself systems developed in abroad such as "Integrated Enveloped and Lighting System", "Anidolic Daylighting System" and etc. are analyzed. Also, the architectural examples are investigated. As results, the new technologies such as optically treated reflective and sun-tracking are adopted to improve daylight performance. And, lots of environmentally friendly buildings are installed on integrated lightself system.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제6권11호
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• pp.453-462
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• 2017

본 논문에서는 SDN (Software Defined Networking) 오픈소스 프레임워크인 오픈데이라이트(ODL, OpenDaylight) 컨트롤러 클러스터 환경에서 클러스터의 구조를 분석하며 고가용성(High availability)을 지원하는 컨트롤러 클러스터의 동작 방식을 다룬다. 또한 Raft 알고리즘의 리더 선정(Leader Election) 과정을 분석하고 효율적인 시스템 운용을 위한 Leader Election 과정의 개선 방안을 제안한다. 이와 함께 샤드(Shard) 리더와 샤드 팔로어의 성능차이를 제시하고, 기존과 제안 방식의 컨트롤러 클러스터의 성능을 비교 분석한다. 실험의 결과에 따르면 리더의 성능은 팔로어의 성능보다 좋으며 하나의 컨트롤러로 요청이 집중되어 전달될 때보다 분산된 컨트롤러로 요청이 전달될 때의 성능이 더 좋다. 따라서 제안 기법을 통하여 컨트롤러로의 요청을 분산함으로써 성능을 높일 수 있다.

• KIEAE Journal
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• 제4권4호
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• pp.45-52
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• 2004

Simulation of daylighting by computer program is a method to avoid unnecessary efforts in manufacture of its testing models, to reduce its measuring tolerances and be able to provide variations of various weather conditions as well. Many simulation programs on daylighting have been released freely or commercialized for selling, however, a demonstration of their availability and validity as a tool for evaluating daylighting performance is required since each one has its own characteristics. The objectives of this study lie in suggesting an application method of evaluation tools and demonstration of limits and characteristics so as to more easily determine the daylightingperformance in the very initial stages of planning for an arbitrary office space in which windows with daylight access are built. We produced scale model of the general light inducing type side lighting with lightshelfand ceiling, and the luminance (at 78 measuring points) and illuminance (at 84 measuring points) were measured in a clear sky. And a comparison of the measured values and the calculated values from a computer simulation using the Lightscape program was performed.

• 한국산학기술학회논문지
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• 제15권12호
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• pp.7393-7402
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• 2014

본 연구는 최근에 높아지고 있는 도시농업 요구에 건축, 도시분야가 빠르게 대응하기 위해서 법제도적 장치로서 기존에 활용도가 높은 생태면적률의 개선에 주목한 연구이다. 기존의 생태면적률은 여러 작물생장조건 중 토심과 투수만을 다룬 지표로 조경식재 등의 관리에는 활용될 수 있으나 도시농업의 주요요소인 작물을 다루기에는 부족한 점이 있다. 본 연구는 이러한 가설을 증명하고 그 개선의 방향을 제시하는 것을 목적으로 했다. 본 연구를 통해서 실제로 생태면적률 지표만으로 작물생장까지를 다루기에는 한계가 있음을 밝힐 수 있었다. 또한 실제 단지계획상에서의 문제점을 도출할 수 있었다. 본 연구는 생태면적률에 빠져 있는 작물생장 조건 중 가장 중요한 일조를 중심으로 생태면적률 개선의 가능성 및 개선 방향을 타진했다는 점에서 도시농업 활성화를 위한 기초 연구를 수행했다는 점에서 의의를 지닌다.