• Title/Summary/Keyword: lighting culture

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Growth Characteristics of Tissue Cultured Plantlets by Lighting Direction and tight Intensity (광조사 방향 및 광도에 따른 배양식물체의 생장특성)

  • 함인기;김현숙;이미애;조만현;이은모
    • Korean Journal of Plant Resources
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    • v.12 no.2
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    • pp.139-144
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    • 1999
  • The present study was carried out to determine the effects of lighting directions and light intensities on the growth of in vitro plantlets of strawberry, potato and lily. The growth of plantlets was affected by two different lighting systems, downward and sideward lighting system. There were no difference for the plantlets of strawberry regardless of lighting directions. However, leaf area, fresh weight and dry weight have increased as the light intensity increased. Also, plant height and root length on node culture of potato decreased at high intensity of the sideward lighting, while thickness of stem and root was thicker, fresh weight and dry weight were heavier, and leaf area was increased. Also, bulblet formation on scale culture of lily has been abundant, and fresh weight and dry weight were increased. Thus, the sideward lighting system which loaded three stories for culture vessels with raising light intensity into culture vessels instead of conventional downward lighting system promoted growth and raised the efficiency of production of high quality microplant.

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A Study on the Workship Special Light Installation Case (종교시설 특수예배조명 설치 사례연구)

  • Lee, Jang-Weon;Lee, Kyung-Han;Kwon, Hyeok-Hwan
    • The Journal of the Convergence on Culture Technology
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    • v.1 no.1
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    • pp.87-90
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    • 2015
  • Find out about the Status and future direction of the latest special lighting, through the installation of special lighting for worship practices used in religious institutions. by applying the LED installation practices, Looked for in the past with other functional features. When replacing halogen lighting with LED lighting, According to the illumination economic evaluation, Confirmed, to be an approximately 25% reduction in the applicable. with functional factors of LED luminaires the feed will be applied more in the future.

A Case Study on the Role of LED Lighting at the Residential Space

  • Kim, Hye Young
    • International Journal of Advanced Culture Technology
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    • v.4 no.4
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    • pp.6-12
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    • 2016
  • Due to the development of technology, the modern people became to require not only more convenient life but also more comfortable and emotional environment, and individually suitable living environment is applied to residents in a residential space. Recently, while the LED lighting was variously attempted in every sector in society, it is needed to express differentiated lighting according to the resident's individual lifestyle in a residential space. In this paper, we analyze the role of LED lighting suitable for the digitalized lifestyle of the modern people through the relevant literature survey and case studies. The following results are obtained in summary of the rapidly changed recent trends of LED lighting. First, LED light replace existing light sources due to the advanced new technology in LED industry, and take the spotlight as a new lighting solution with the development of variable color LED bulb and the control technology by the wired and wireless communications. Second, LED lighting can be structurally applicable to every lighting device because of its compact and lightweight units, can produce abundant light environment by expression of variable colors and moods with the easy coloring and dimming control, can be reborn as emotional lighting design. Third, as recently practices are constantly appeared that integrate LED lights in the interior elements, such as object and furniture, and combine advanced LED lighting technology to new materials, the portion of illumination on the indoor environment is further increased after integrating the LED lighting and interior elements make boundaries of lighting and product architecture become blurred. LED lighting is confirmed that is being changed from the external functionality including material, shape, color, and etc. into the contextual emotion design including the lights expression, variable color, brightness control, making image, and etc. as the light source in current smart lighting era.

Indoor Surveillance Camera based Human Centric Lighting Control for Smart Building Lighting Management

  • Yoon, Sung Hoon;Lee, Kil Soo;Cha, Jae Sang;Mariappan, Vinayagam;Lee, Min Woo;Woo, Deok Gun;Kim, Jeong Uk
    • International Journal of Advanced Culture Technology
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    • v.8 no.1
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    • pp.207-212
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    • 2020
  • The human centric lighting (HCL) control is a major focus point of the smart lighting system design to provide energy efficient and people mood rhythmic motivation lighting in smart buildings. This paper proposes the HCL control using indoor surveillance camera to improve the human motivation and well-beings in the indoor environments like residential and industrial buildings. In this proposed approach, the indoor surveillance camera video streams are used to predict the day lights and occupancy, occupancy specific emotional features predictions using the advanced computer vision techniques, and this human centric features are transmitted to the smart building light management system. The smart building light management system connected with internet of things (IoT) featured lighting devices and controls the light illumination of the objective human specific lighting devices. The proposed concept experimental model implemented using RGB LED lighting devices connected with IoT features open-source controller in the network along with networked video surveillance solution. The experiment results are verified with custom made automatic lighting control demon application integrated with OpenCV framework based computer vision methods to predict the human centric features and based on the estimated features the lighting illumination level and colors are controlled automatically. The experiment results received from the demon system are analyzed and used for the real-time development of a lighting system control strategy.

A study on Urban Lighting Plan methodology with Space Syntax Theory (공간구문론을 활용한 도시조명계획 방법론 연구)

  • 오은숙;최안섭;김영욱
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2002.11a
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    • pp.233-237
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    • 2002
  • In consideration for evaluating urban lighting plan as culture of a society, preparing lighting plan while designing urban plan is a fundamental process. This study proposes a methodology, maintaining and embossing urban throughout preparing a long-term urban lighting plan considering overall urban space as well as improving competitive power for lighting to take an important role in total environmental design project.

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A Study on Development of Lighting Design Utilizing Traditional Materials and Natural Objects (전통소재와 자연물을 활용한 조명디자인 개발 연구)

  • Yoon, Yeoh-Hang;Kim, Ji-Soo
    • Journal of the Korea Furniture Society
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    • v.28 no.1
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    • pp.80-87
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    • 2017
  • As modern society attaches important to a value in mental aspect and characteristics of consumers who become diverse and individualistic, lighting design also changes closely with everyday life. This study suggests a new concept of indoor lighting design, combining natural objects with lattice and Korean paper, one of our representative traditional materials in lighting design used in everyday life. In particular, it was designed with aesthetic sense of traditional culture and Korean sentiment besides external effect and function by combining Korean paper with natural objects such as insect and plant, material that could be easily obtain around us. As a result, it is intended to enhance quality of life and pursue happiness by suggesting a new concept of lighting design which is modern, harmonizes with everyday life of modern humans who become individualistic, and can arouse sensibility, overcoming the limitations of traditional lighting in indoor lighting.

Current Status of Lighting System and Illumination Distribution in the Greenhouse for Light Culture of Strawberries (딸기 전조재배 온실의 인공광 설치실태 및 조도분포 조사분석)

  • 김태한;장익주;이경진
    • Journal of Biosystems Engineering
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    • v.24 no.1
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    • pp.19-24
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    • 1999
  • Motivated by the need for developing the more efficient lighting system for light culture of strawberries in the greenhouse, this paper aims at acquiring and suggesting more concrete and scientific foundation of illuminating position, numbers of light source by investigating the types of lighting system and illumination distribution in the greenhouse for light culture of strawberries. The results of investigation and experiment are summarized as following below: 1. The types of lighting system used in the greenhouse producing strawberries were classified as 1 line and 2 lines lighting system. 2. As for the arranging types of artificial light, 2 lines lighting system, were classified as Z-type, N-type and W-type. (Refer Fig. 3) 3. The results of illumination distribution for Z-type, N-type and W-type of 2 lines illuminating system in the greenhouse with a small size tunnel measured at the height of 1.5m from the ground with 220V, 100W lamp in 6m light gap showed that maximum illuminance are 961x, 1211x, 1251x, minimum illuminance are 4.41x, 4.71x, average illuminance are 33.71x, 43.11x, 44.51x and standard deviations are 28.31x, 35.41x, 38.31x at each types. 4. Proportion of the area below optimal illuminance to floor area at the two lines illuminating system of Z-, N-, and W-type in greenhouse were appeared as 39.4%, 26.0% and 26.3%, respectively. Also proportion of the area over optimal illuminance to floor area at the two lines illuminating system of Z-, N-, W-type in greenhouse were appeared as 16.8%, 14% and 14.7%, respectively. Thus N-type was superior to the others from the view points of optimal illumination distribution and energy saving.

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Variation of Spatial Cognition According to Visual Perception and Psychological Responses for Lighting Environments in Rest Space (휴게실 공간의 조명환경에 대한 시각적 감지 및 심리적 반응에 따른 공간 인지도 변화)

  • Kim, Jae-Sang;Lee, Ji-Hyun;Kim, Soo-Young
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.24 no.5
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    • pp.443-453
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    • 2012
  • This study examines visual perception and spatial satisfaction according to lighting conditions. Field measurements and surveys were performed in three rest space of university buildings where various lighting conditions were employed. Results indicate that overall impression of space improved when low color temperature, such as 3,000 K governed overall lighting environment and accent lighting was used for wall surfaces. Lighting conditions that kept uniform illuminance levels using area light sources containing fluorescent lamps with 6,500 K failed to keep favorable spatial satisfaction for space. High color temperature was not recommended for lighting in rest space. Asymmetrical illuminance levels formed by low color temperature such as 3000 K is recommended to keep positive mood and improve spatial satisfaction in rest space. Overall impression of the space was influenced by visual comfort, color temperature, spatial satisfaction and brightness. Spatial satisfaction for space was effectively impacted by psychological comfort, color temperature and overall impression for lighting conditions. Psychological comfort in space was influenced by color temperature, spatial satisfaction and visual annoyance from reflected light.

The nocturnal characteristics of Seoul city: Focused on light color

  • Sung Dae Hong
    • International Journal of Advanced Culture Technology
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    • v.12 no.2
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    • pp.353-359
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    • 2024
  • The color temperature and light color of nighttime lighting in a particular city is an important factor in determining its nighttime identity. To quantitatively analyze the nocturnal characteristics of Seoul, this study focuses on the light color of the lighting sources that used in the places included in the Seoul Night View 100 Photobook. As a result, the color temperature of white light in the surveyed places is in the range of 2,500~3,500K, of which 3,000~3,500K represents the highest proportion. In addition, the color temperature in the 2,500~3,500K range was found to be evenly distributed across the five surveyed regions. Apart from white light, blue color hue accounts for a high percentage in the monochromic light category, and the excitation purity was measured to be 71.6% on average. In addition, 46% of the buildings with monochromic light are in urban centers.

Cognitive Effects on Lighting Environment for Improvement of Spatial Satisfaction and Psychological Comfort (공간 만족도 및 심리적 편안감 향상을 위한 실내 조명환경에 대한 인지효과)

  • Rim, Min-Yeop;Lee, Ji-Hyun;Kim, Soo-Young
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.24 no.6
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    • pp.497-508
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    • 2012
  • Occupants' visual perception, psychological responses and spatial satisfaction under various indoor lighting environments were analyzed in this study. Field measurements and surveys were conducted in four coffeeshop space where different lighting conditions were used. Results imply that worse visual comfort was reported under direct lighting conditions that exposed light sources to occupants. To improve spatial satisfaction in space, lighting environments should lessen visual thresholds and distraction. Also, necessary illuminance levels should be kept with appropriate color of light that occupants prefer. Worse spatial satisfaction was reported under direct lighting environments, and spatial satisfaction was strongly relevant to visual comfort. Psychological comfort for space was positive in space where visual thresholds were minimized and visual comfort was positively evaluated. Psychological and spatial satisfaction was relevant each other. Occupants preferred to stay longer in space where psychological and spatial satisfaction was positively achieved due to less visual thresholds and improved visual comfort. Better psychological and spatial satisfaction was achieved in space where temporary mood and visual perception were favorably evaluated under indirect lighting environments.