• Journal of the Korean Institute of Educational Facilities
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• v.20 no.3
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• pp.29-39
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• 2013

This study addresses the evaluation on the satisfaction of school illumination quality by applying SERVPERF model after extracting factors affecting school illumination quality. Three types of illumination systems (fluorescence light, general LED light and high color rendition LED light) were tested by students who have used each illumination system. Three factors such as effectiveness, esthetic sense and function were developed for evaluation. Satisfaction evaluation was performed based on applied SERVPERF model by comparing perceived levels. The differences of perceived levels of satisfaction on the illumination systems were analyzed by ANOVA. The results said respondents satisfy only the high color rendition LED light regardless of three factors. Especially, students who experienced high color rendition LED light have strong intention to recommend that illumination system to other schools. They also express their desire to use that system at home. Interestingly, there is not much satisfaction difference between fluorescence light and general LED light.

• Journal of the Korean Institute of Educational Facilities
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• v.18 no.2
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• pp.25-33
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• 2011

This study performs the objective evaluation on simple comparison and calculation works by students under LED illumination conditions according to three types of color temperatures (7000K, 5000K, 3000K) in the classroom, Since the objective of this study is to develop an electric lighting conditions suitable for students in the classroom, the learning performance under three types of LED illumination conditions were analyzed. The 4 kinds of simple tests concerning with learning performance were developed and test results under natural light and LED illumination by 3 types of color temperatures were analyzed. There were differences by t-test in most cases among simple experiment results of different illumination conditions ($p{\leq}.05$). It was confirmed that illumination condition plays an important role when students simply compare words or perform arithmetic calculations. The experimental results of this study might be applied to designing better luminous environment.

• Journal of Environmental Health Sciences
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• v.5 no.1
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• pp.40-45
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• 1978

We have selected 36 schools of a total of night high schools for boys and girls in seoul and measured intensity of illumination of the classroom, The corridors and the stairs that students study and live, with priority given to an illumination, a primary factor of environmental sanitation of school following is the result. 1. The maximum average intensity of illumination of the classroom is 93.2 Lux, and the minimum average intensity of illumination 39.5 Lux. Mean$\pm$S, is 59.03$\pm$22.8 Lux 2. The maximum average intensity of illumination of the corridor is 39.2 Lux, and the minimum average intensity of illumination 11.1 Lux. 3. The maximum average intensity of illumination of the stair is 11.58 Lux, and the minimum average intensity, of illumination 4.92 Lux, mean$\pm$S.D is 7.88$\pm$10.0Lux. 4. Schools with tile illumination facilities more than 50 Lux are 63.8% and less than 50 Lux are 36.2%. 5. Schools with 9-11 facilities of a source of light per classroom by a fluorescent lamp are the most as 30.50%. 6. As for the corridor, schools with the illumination equipment less than 10 Lux are 27.8%, are more than 10 Lux 72.2% 7. As for the stairs schools with the illumination equipment less than 10 Lux are 77.8%, and more than 10 Lux 10 Lux 22.2%.

• Journal of the Korean Institute of Educational Facilities
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• v.7 no.3
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• pp.5-14
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• 2000

The purpose of this study is to analyze the environmental characteristics of Hansung Girls' Middle & High School located on the northern slope of Mt. Naksan in Seoul but sited at different aspects. The measured temperature and illumination in March, July and December were analysed. The proportion of window size and questionaries were used also. The results of observation are as follows: (1) The temperature of the southward classrooms was $3.6^{\circ}C$ higher than eastward or westward classrooms in March, but the difference of the both values in July were only $0.3^{\circ}C$ in the average. (2) The temperatures in December decreased in the order of aspects: southward, westward and eastward. (3) The highest values for illumination appeared in the classroom faced to the south and the values decreased from westward to eastward. (4) Temperatures and illumination were varied not only with the aspect but also with the number of story and the proportion of the window size. However, the heating facilities and illuminators are installed evenly without considering the condition of the buildings. The heating facilities should be installed differently according to the direction and height of the story of the building. The heating facilities should be installed sparsely for the classrooms faced southward, and more densely near the hallway side to achieve satisfaction of students and to save expenses of heating. It will be better that electric power switches for window side have to be set separately from hallway side. Improvement of the condition of illumination and temperatures will help students to promote their health and learning.

• Journal of the Korean Institute of Educational Facilities
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• v.18 no.3
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• pp.23-33
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• 2011

This study investigates the evaluation on simple comparison and seeking hidden figures works under LED illumination conditions according to three types of color temperatures (7000K, 5000K, 3000K) in the classroom, Since the objective of this study is to develop an electric lighting conditions suitable for students in the classroom, the performance of concentration and visual discrimination by students under three types of LED illumination conditions were analyzed. The 4 kinds of simple tests concerning with concentration and 2 types of tests for visual discrimination were developed, and test results under natural light and LED illumination by 3 types of color temperatures were analyzed. There were differences on concentration as well as visual discrimination performance in most cases by t-test ($p{\leq}0.05$). For further analysis among three types of color temperatures and natural light, ANOVA tests were performed. The test results shows that illumination condition plays an important role when students try to concentrate on simple comparison of characters, figures or colors and seek hidden figures. The experimental results of this study might be applied to designing better luminous environment.

• 한국정보통신설비학회:학술대회논문집
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• 2008.08a
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• pp.273-276
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• 2008

This article describes a LED illumination infrastructure for ubiquitous society based on the Visible Light Communication technology. The VLC is one of the advanced communication system using "Visible Light". The VLC system has a lot of advantageous features and can be used in various places for the next future generation. So, we analyzed ubiquitous service model based on the VLC system and some applications. And we renewed discussion about LED illumination infrastructure for u-Society.

• Journal of the Korean Institute of Landscape Architecture
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• v.29 no.4
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• pp.44-52
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• 2001

This study performed factor analysis for 21 independent variables related to the effect of illumination and suggested the effect by multiple regression analysis on the relationship between the effect of illumination and the satisfaction of use of a dependent variable to find the effect of illumination in urban parks at night and the effect of illumination on the satisfaction of use. The results of this study are as follows; 1) Of the 21 independent variables used to study the effect of illumination in urban parks at night, the impact on safety and possibility of crime was highly. The effects of illumination by factor analysis were abstracted as effects of removing anxiety, securing safety, increasing use. 2) As a result of multiple regression analysis, independent variables influencing satisfaction of use in urban park were proved as effects of removing anxiety, securing safety, increasing identity, preparing atmosphere and increasing use. Also, the effect of securing safety was the most important factor; it showed a level of importance 2 times higher than the effect of removing anxiety, and 7.7 times higher than the effect of preparing atmosphere in relative contribution of the effect of illumination to satisfaction of use. 3) Of the effects of illumination influencing satisfaction of use in urban parks, the effect of securing safety and the effect of increasing visibility were more significant than the effects of removing anxiety, preparing atmosphere and increasing use. This fact means that personal safety an the identity of persons or facilities in the space of use should be considered with priority in planning or designing illumination. Also, it implies hat, for night use in urban parks, lightness of the space is required for general safety of use at parks, and proper illuminance on the activity in the space of use should be required. The subject parks of this study are 8 urban neighborhood parks. The model on the effect of illumination and the satisfaction of use depends on characteristics and conditions of location of he park and user class, so the subject parks and persons should be varied, and the difference by sex or ages should be suggested.

• Journal of Sensor Science and Technology
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• v.30 no.4
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• pp.196-203
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• 2021

In this study, an optical identification system was developed, wherein visible light is used to transmit the interrogating signal, and infrared is used to send the response signal. In the reader, visible light from a light emitting diode (LED) array was modulated via modified pulse width modulation for flicker-free illumination and dimming control. Moreover, the duty factor of the dimming control time was employed to control the illumination from the LED. In the transponder, the spike signal in the output of the high-pass filter was utilized to recover the interrogating signal while preventing interference from the 120-Hz noise from adjacent lighting lamps. The illumination was controlled in 26-86% range of the constant wave LED illumination by changing the duty factor from 20% to 90%. This configuration is advantageous for the construction of optical identification systems for automatic security check and car fare calculation at toll gates or parking facilities.

• Korean Institute of Interior Design Journal
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• v.26 no.5
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• pp.34-41
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• 2017

It is necessary to conduct a basic research on fusion of ighting design or lighting environment to improve the health and quality of life of elderly people. The purpose of this study is to analyze the lighting situation of elderly people 's residential facilities in terms of space environment design plan and to analyze the trends in smart home, design and technology. It is to provide basic data for the prototype of lighting fixtures for elderly people living facilities considering functional, physiological and emotional characteristics. For the study, the target sites were selected and the results of the illumination survey of the target facilities were divided into two types of spaces, residential and other public spaces, and their location, lighting fixtures' type, color temperature, illuminance. The results of the survey showed that the overall physical illumination compared to the recommended illuminance for the elderly satisfied the recommended range and provided the appropriate brightness for the elderly. However, in the application layout of the lighting fixtures, a monotonous arrangement and a lighting fixtures type consisting entirely of simple square type fixtures and downlight types were applied. It would be desirable to use different types of lighting fixtures in the design for various functions, such as making the environment more comfortable. Future research will propose a prototype for the design direction of the subdivided lighting fixtures that classify the space according to functions and understand the vision problem of the elderly while aesthetically.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 1994.10a
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• pp.51-55
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• 1994

This study was attempted to investigate the facilities and environments of kindergarten attached to colleges, and ultimately to make up the adequate environment of for children. For these purposes, investigators directly visited 6 kimdergartens attached to colleges, and actually measured the facilities and equipments of these kindergartens. Concretely, our invetigators analyzed the actual conditions of kindergarten attached to colleges contering around the lighting and illumination of classroom, corridor, hall, toile room, dining room, and furnitures, closing materials of the floor, wall, ceiling.