• Title, Summary, Keyword: Night illuminance

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A Study on Suitable Illuminance by Spaces in Urban Parks (도시공원의 공간별 적정조도)

  • Kim Jin-Seon;Choi Yeon-Chul
    • Journal of the Korean Institute of Landscape Architecture
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    • v.32 no.5
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    • pp.23-34
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    • 2004
  • In this study, 1 dependent variable and 9 independent variables were established to examine suitable illuminance by spaces in urban parks in consideration of night users' psychological reactions and activity types. Such fixed variables were evaluated by a series of experiments of changing illuminance, and correlation among those variables was verified by correlation analysis and multiple regression analysis to suggest suitable illuminance by spaces. The results of this study are as follows: 1) The independent variables influencing suitable illuminance by spaces in urban parks were directly influenced rather by the psychological reaction of night users than the activity types by spatial functions. 2) Securing suitable illuminance by spaces commonly increased spatial availability, created certain atmosphere, and provided safety in the psychological reaction of night users. 3) Suitable illuminance by spaces in urban parks is: Central square is 31.88lx, resting space 6.30lx, exercising space 33.14lx, children's playground 14.19lx, pedestrian road 12.29lx, entry space 16.30lx, and green space 7.03lx. That is, when a place had more positive activities, spatial illuminance was increased. 4) Though comparison by spaces with the illuminance standard for urban parks as mentioned in KS A 3011-1993 can not be made, such illuminance was relatively compatible with the permissible range of illuminance in the author's opinion. It is expected that this study investigating suitable illuminance by spaces for night use in urban parks, will provide necessary knowledge for securing suitable illuminance by spaces in urban parks through classifyingin detail the illuminance standard of KS A 3011-1993. Besides, by helping make us aware of the importance of illuminance in urban parks as well as of external space in the night, this study will contribute to academic research and development in the field of landscape architecture and associated fields and be utilized in establishing legal and institutional standards.

An Analysis for the Night illuminance Affected on Light Environments and Weather Conditions (광환경과 기상조건에 따른 야간조도 영향 분석)

  • Lee, Jaewon;Park, Inchun;Choi, Cheolmin;Kim, Young-chul
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.24 no.1
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    • pp.25-32
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    • 2016
  • This study deals with the light environments and weather conditions affecting to the night illuminance over the Korean peninsula. The experiment was executed to analyze the effects on the illuminance at separate sites(Gyeryong and Pilseung) considering the different light environments. The analysis was applied to illuminance measurement from the lightmeter, which was developed for the IYA(International Year of Astronomy) 2009, in order to observe the illuminance of areal networks. The weather observations, such as the cloud cover and visibility, were used to understand the quantitative influence of the illuminance to the selected sites. The results show that the illuminance measurements are significantly different from data of the operational illuminance prediction model which simply applies extinction effect for the illuminance. It shows that these differences are caused by the light environments and weather conditions for each site. Therefore, it can be confirmed that the night illuminance is the output of interaction with the characteristics of light for luminous sources.

Correlation between the Illuminance and the Flowering and Leaf Growth of Trees at Night - In Case of Downtown from Jamsil Station to Olympic Park, Seoul - (도심 내 야간의 조도와 봄철 수목 개화 및 잎 생장 간 상관관계 - 서울 잠실역에서 올림픽공원 구간을 대상으로 -)

  • Han, Bong-Ho;Kim, Jong-Yup;Kwak, Jeong-In;Choi, Tae-Young
    • Korean Journal of Environment and Ecology
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    • v.29 no.3
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    • pp.441-453
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    • 2015
  • In this paper, according to the illuminance at night with artificial lighting in downtown Seoul, trees flowering and leaf growth rate was performed as a case study to examine whether there is a difference. The illuminance was measured at 78 points on a total of 26 points, the range of illuminance were divided into three groups considering land use, Group A (plots 1-7) were 4.90 ~ 112.50 lx, Group B (plots 8 to 18) were 0.45 ~ 42.40 lx, group C (plots 19 to 26) were 0.28 ~ 22.10 lx. According to the One-way ANOVA on illuminance difference, the survey groups were classified into three groups. To survey the ratio of the flowering Prunus yedoensis and Rhododendron spp. and to survey the ratio of leaf growth Zelkova serrata, Ginkgo biloba, and Acer palmatum each 30 individuals were investigated. Rhododendron spp. to study the ratio of the flowering and Acer palmatum to study the ratio of leaf growth were determined to be useful as indicator woody species according to the correlation. The higher illuminance of night lighting is, the faster flowering and leaf growth of trees will be by correlation between the mean illuminance of each group and the flowering and leaf growth of trees. In the future, should be made a more detailed study of how much affect to the trees with some impact on the level of light pollution at night lighting.

A Study on Maintenance Planning for Efficient Urban Lighting in Wonju-si (원주시의 효율적인 도시조명을 위한 관리 계획에 관한 연구)

  • Lee, Yeon-So;Woo, Soo-Jin;Choi, Key-Soo
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.4
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    • pp.7-15
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    • 2011
  • Based on the master plan, this study classified Wonju-si into five major regions and 19 areas by analyzing its night characteristics and deduced problems by analyzing quantitative light distribution of major points at the regions and areas through the measurement of illuminance and luminance and by surveying people's awareness. To develop eco-friendly night environment image of Wonju, Woju's identify was to be created by the planning for the 19 area and improvements for each type. Additionally, detailed items for maintenance were suggested by classifying them into illuminance, color temperature, luminance, lighting display, lighting time, light distribution type, and so forth.

A Study on the Luminous Environments of Architectural Building for Improvement of Night-Scape in Coastal Resort - Focused on the Gyengpo Park - (해안 휴양지의 야간경관 개선을 위한 건축물의 조명환경 연구 - 경포도립공원을 중심으로 -)

  • Cho, Won-Seok;Kim, Heung-Gee
    • Journal of the Korean Institute of Rural Architecture
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    • v.10 no.3
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    • pp.27-34
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    • 2008
  • Recently, the outdoor lighting of architectural Facade has increased for the improvement of night-scape in urban and coastal resort. The purpose of this research is to analyze lighting characteristics; Luminance, Illuminance, Color Temperature, Chromaticity in Gyengpo Park of Eastern famous coastal resort. The result of this paper is as follows: 1) The Luminance ratio was measured that compare to the 1:10 criterion(IESNA) was in excess to the most building except "K". Because of these condition, Luminance environments was injurious to visual health the overuse of the outdoor lighting or glare to the eyes. 2) The level of vertical Illuminance value was insufficient 33.3% among the cases of survey with 4Lux standard of CIE. 3) The kinds of outdoor lighting of BLDG were increased lighting emitting diode(LED), metal halide(MH) instead of reduction trend of neon, fluorescent light, halogen. As the crisis of Energy resources we will be investigate adapt method of outdoor lighting, which design is based on economical efficiency by the use of optimum lighting.

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Analysis of a Night Illuminance Distribution in School Buildings (학교 건축물의 야간 조도분포 분석)

  • 박동화;성낙진;신재화;이병기
    • The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.10 no.6
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    • pp.48-53
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    • 1996
  • In this paper, the illuminance of elementary, junior, and senior high school in Inchon was measured and analyzed to investigate their night illuminating circumstances(classrooms, science rooms, and laboratories). More than four schools were selected based on the years elapsed(l0, 20, and 30 years, etc) since the opening of the schools. It was shown that the average illuminance for the classroom and that for science room and laboratory have been improved significantly such that the former was 235.6[lx] (260[lx] for senior high school, 208[lx] for junior high school, 203[lx]) for elementary school) and the latter was 233.7[lx](248.8[lx] for senior high school, 216.4[lx] for junior high school, 207.8[lx] for elementary school). The uniformity of the illuminance was exceedingly worse than the recommended one(the average value for the classroom and that for sciense room and laboratory were 0.95 and 1.08, respectively). It was found that the maximum to minimum illuminance ratio with respect to illumination derivative(7.9 for classroom, 6.8 for scienceroom or laboratory) was very high for most school buildings and was much higher for the old ones. From the measured results, it was shown that the illuminance for the school buildings needs to be improved with regard to quality.

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The Actual State and Evaluation of Artificial Lighting on Coffee Houses Using Study Place around University (학습공간으로 이용되는 대학주변 커피전문점의 조명 실태 및 평가)

  • Choe, Sol-ji;Choi, Yoon-Jung
    • KIEAE Journal
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    • v.11 no.6
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    • pp.53-62
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    • 2011
  • This study aimed at suggesting improvement of lighting environment of the coffee house using study place. To this end, a series of field investigation was conducted in four possible target coffee houses around university. The field measurement included measurement of general illuminance and tabletop illuminance, observing illumination condition, and status of artificial lighting. Also, on-site questionnaire survey was administrated to 80 users of field measurement targets about using characteristics of coffee house and user's subjective response on light environment. The results are summarized as follows: (1) According to questionnaire survey, most of users checked 'learning (study and reading)' in 'purpose of coffee house using', and 'slightly dark' was checked most in each subjective response (brightness on general space and on tabletop at daytime/night); (2) as results of measurements on general illuminance and on tabletop illuminance during daytime, only one coffee house was suitable for standard; (3) as results of measurements on illuminance during night, all target coffee houses were not met the standard; (4) as results of uniformity ratios, almost uniformities of general illuminance were not met the standard except one case. The common problems of lighting environment of coffee house were analyzed as lack of daylight illumination e.g. having low amount of sunshine from skylight, un-uniformity of insolation by floor plan and absence of window blind, and un-uniformity of artificial luminous intensity e.g. lack of the number or brightness of artificial lighting, using the indirect lighting, using only local lighting, and non-uniform arrangement of artificial lighting.

Model on the Suitable Illuminance at Urban Neighborhood Park (도시근린공원의 적정조도모형)

  • 최연철;김진선
    • Journal of the Korean Institute of Landscape Architecture
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    • v.29 no.3
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    • pp.29-37
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    • 2001
  • The purpose of this study is to determine the suitable illuminance model of an urban neighborhood park. To this end, 1 dependent variable and 11 independent variables were set, and multiple regression analysis was applied to find correlation between variables and the model. The results of this study are as follows; 1) Among 11 independent variables abstracted to study suitable illuminance model of an urban neighborhood park, as a result of analysis on correlation between suitable illuminance of a dependent variable and activity space by using dummy variables, activity type and illuminance by spaces the suitable illuminance required for an urban neighborhood park was much influenced by activity type, and the fact that the activity was not limited to a specific space. 2) As a result of multiple regression analysis, independent variables influencing the suitable illuminance model of an urban neighborhood park were activity space, illuminance by spaces, seated activity, standing activity, and sporting activity. And, for relative contribution of independent variables to suitable illuminance, activity with sporting showed an importance 22 times higher than seated activity. When the central square(Sp_1) of activity spaces was set to reference category using dummy variables, it showed a contribution 52 times higher than sorting space(Sp_7) and the central square as the most important variable. 3) It was analyzed that suitable illuminance of an urban neighborhood part was most influenced by sporting activity but the relative contribution of a sporting space where activity with sporting occurs was least in view of the function of the space. Very high illuminance is required to accept high activity, and if illuminance at a certain space becomes too high, it may influence the illuminance of other spaces, and may consequently have a negative effect on the suitable illuminance of an urban neighborhood park. The results of this study were mainly for teenagers and young adults in their twenties, so further concrete studies which consider gender and a wider age range are needed in the future. Based on subsequent study, suitable illuminance by spaces shall be suggested.

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Lighting Plan for Outdoor Space Using Lighting Measurements and Simulations in Residential Areas (조명환경 실측과 시뮬레이션을 통한 주거단지 내 옥외공간 조명계획)

  • Park, Byoung-Chul;Choi, An-Seop
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.19 no.7
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    • pp.1-8
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    • 2005
  • Outdoor spaces are used for recreation, rest area, and night activities of residents. By these tendency, outdoor space is recognized as a very important space in residental areas. However, outdoor space is frequently used at night but lighting plan for these spaces is not suited for the selection of luminairce, arrangement of luminaires and planing of illuminance. From this point of view, this paper investigated the essence of light in outdoor space, analyzed different outdoor luminous environment and performed simulations. This paper finally suggested recommended level of illuminance and lighting plan of such spaces.

Analysis on Luminous Environment and Subjective Image of Two Different Commercial Streets at Night - Focused on View Point of Pedestrian - (야간상업가로의 조명물리량 및 이미지 분석 - 보행자 시점을 기준으로 -)

  • Shin, Ju Young;Kim, Jeong Tai
    • KIEAE Journal
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    • v.7 no.4
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    • pp.31-38
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    • 2007
  • Streetscape plays on important role in urban cities. Characteristics of streets is basically defined by the building facade, signs, plants and paving during the daytime. However at night, street receives a new appearance due to the shop light from the buildings, exterior lightings, signboards and street light, and it creates most of the image of the streets. This study aims to analyze the luminous environment and its subjective image of two different pedestrian's commercial streets. Insa-dong street and Myungdong street were chosen for the study. Horizontal illuminance and luminance on building surface, advertisement billboards and pedestrian road were measured. Thirty students were asked to rate the five scaled questionnaire on their subjective images of the streets. Statistical analysis including profile, correlation and T-test are conducted and some findings are discussed