• 한국실내디자인학회논문집
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• 제4호
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• pp.16-21
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• 1995

Although it has been suggested that lighting influences our moods, little is known about dimensionality of mood patterns. The knowledge of consumer's mood pattern in lighting condition may provide interior designers with a valuable information for the lighting design. This article investigates the underlying structure of moods occuring in lighting conditions. Meanwhile, this examines custom-ers' desired mood type of lighting, and explores the influ-ence of individual characteristics on selecting the preffered lighting moods. The result uncovers five discriminable patterns of mood-dynamic, intimate, delightful, elegant, and serene feeling results from well organized lighting system. Among the five moods, serene atmosphere appears to be the most preffered mood from respondants. It is also found that the perceived preference of lighting atmo-sphere varies across personal characteristics of the cus-tomers, socio-economic differences and the visiting pur-poses to the coffeeshop. These findings present interest-ing and potentially valuable implications for interior de-signers that proper planning of lights which inducemoods can achieve dramatic effects and aid in the cre-ation of the desired atmosphere.

• 원예과학기술지
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• 제34권2호
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• pp.207-219
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• 2016

자연단일기에 장일식물의 개화를 촉진하기 일반적으로 사용되어 온 백열등(INC)이 낮은 에너지 효율 때문에 생산이 금지되었는데, 이를 대체할 수 있는 광원 중 하나는 컴팩트 형광등(CFL)이다. 본 연구에서는 몇 가지 장일식물에 대해 9시간 단일(SD) 조건의 $20^{\circ}C$ 온실에서 INC, CFL, 그리고 이 둘의 혼합광원(INC + CFL)을 이용하여 2시간(2-h) 또는 4시간(4-h) 야파(NI)나 6시간 명기연장(DE) 처리를 한 후 개화 및 형태학적 반응을 비교하였다. 전조 광원의 적색광(R):원적색광(FR) 비율은 각각 0.60, 8.46, 0.91이었으며, PPFD는 모두 $2.3{\pm}0.3{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$로 맞추었고, 대조구로 9시간 단일처리(9-h SD)를 두었다. 처리 10주 후, 페튜니아 'Wave Purple'는 단일 하에서 전혀 개화하지 않았으며, 모든 장일처리에서는 100% 개화하였다. 개화는 INC 및 INC + CFL 하에서 FL보다 앞당겨졌으며, DE와 4-h NI가 2-h NI보다 개화를 더 촉진하였다. 페튜니아 'Single Dreams Red'는 처리 후 65일까지 모두 개화하였는데, DE와 4h-NI가 2-h NI보다 개화를 더 앞당겼고 INC와 INC + CFL에서 빨리 개화하였으며 INC 6-h DE에서 개화소요일수가 가장 짧았다. 초장은 페튜니아 두 품종 모두 개화가 빨랐던 INC 하에서 가장 길었고, INC + CFL는 중간 정도였다. 팬지 'Coiossus Yellow'와 'Delta Blue Blotch' 두 품종 모두 INC 처리가 FL보다 개화를 촉진시켰는데, 전조시간별 차이는 작게 나타났다. 줄기 신장도 INC가 촉진하였으나 광원 및 전조시간에 따른 차이는 페튜니아보다 작게 나타났다. 결국 R:FR이 낮은 INC나 INC + CFL 하에서 개화 및 줄기신장이 촉진되었으며 장일처리시간이 길수록 그 효과가 더 컸다. 결론적으로, INC의 대체 전조광원으로써 CFL도 페튜니아 및 팬지의 개화를 촉진하였고 줄기신장을 억제하였으나, 개화 촉진 효과는 INC에 비하여 작았다.

• International Journal of Advanced Culture Technology
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• 제7권4호
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• pp.260-267
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• 2019

Harvested de-astringent persimmon 'Fuyu' were treated with various lighting sources under low (3℃) and high (22℃) temperatures. The weight loss rate of fruits was lower in those with Red LED than Fluorescence and Blue LED under both temperature conditions. Hardness and soluble solid content of fruits were higher in those with 3℃ / Blue LED or mixed LED (Blue+Red LEDs). Beta-carotene and lycopene content of fruit peel were higher in those with 3℃ than 22℃ and with Red LED or light sources with mixed red wavelength under both temperatures. When the fruits treated with light and temperature were stored for 4 days under 3℃ / dark condition, the hardness of the fruits did not significant difference among the treatments. Taken together all the results, it would be best to treat it light sources mixed red wavelength under 3℃.

• Safety and Health at Work
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• 제8권2호
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• pp.151-155
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• 2017

Background: At the entrance of a tunnel, reflection of sunlight from the surrounding environment and a lack of adequate lighting usually cause some vision problems. The purpose of this study was to perform a safety evaluation of lighting on a very long road in Ilam, Iran. Methods: The average luminance was measured using a luminance meter (model S3; Hagner, Solna, Sweden). A camera (model 108, 35-mm single-lens reflex; Yashica, Nagano, Japan) was used to take photographs of the safe stopping distance from the tunnel entrance. Equivalent luminance was determined according to the Holliday polar diagram. Results: Considering the average luminance at the tunnel entrance ($116.7cd/m^2$) and using Adrian's equation, the safe level of lighting at the entrance of the tunnel was determined to be 0.7. Conclusion: A comparison between the results of the safe levels of lighting at the entrance of the tunnel and the De Boer scale showed that the phenomenon of black holes is created at the tunnel entrance. This may lead to a misadaptation of the drivers' eyes to the change in luminance level at the entrance of the tunnel, thereby increasing the risk of road accidents in this zone.

• 한국디지털건축인테리어학회논문집
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• 제11권1호
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• pp.83-90
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• 2011

Lighting simulation is becoming increasingly more important as a method for design and evaluation. There is a wide range of packages that provide the accuracy and the usability in lighting simulation. Relux developed by Relux Informatik AG, Switzerland, Relux offers users innovative and high-performance light planning software with open interfaces and simultaneous access to the latest product data from luminaire and lamp manufacturers. The goals of this report is to explore some of the lighting simulation issues relating to Relux. It is hoped that it will provide some background information that will enable a designer and engineer to make some informed judgements on the potential of the current state-of-the-art in computer prediction of lighting in buildings and how this may be used to assist in building design.

• 조명전기설비학회논문지
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• 제27권12호
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• pp.28-37
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• 2013

This paper focuses on the domestic illumination research trends in 2012 based on reviewing the published papers in the Journal of the Korean Institute of Illuminating and Electrical Installation Engineers. It classifies and resumes the papers in five themes including exterior lighting, interior lighting, LED/OLED, optical device and optical fiber, and lighting industry. By comparatively studying a large number of papers published in Japan, North America, and China in the same year, the international illumination research trends are also figured out and further academic research topics are suggested.

• 한국디지털건축인테리어학회논문집
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• 제12권2호
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• pp.33-38
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• 2012

The purpose of luminance measurement in lighting design of urban scale is to prevent light trespass and light pollution, caused by over-bright. Specially, the illumination of road, tunnel and sports complex as urban infrastructure is measured by international standard for illuminance and luminance. It has been used the spot luminance meter and the image photometer to define the characteristics of qualitative and quantitative in exterior lighting. This study introduced the concept of HDR Image, procedure of HDR Image creation and analysis. Applications of HDR Image, particularly within the apartment building exterior lighting design analysis, have been demonstrated. The procedure proposed in this study is a affordable method that is useful for the assessment of luminance distribution in the scene with electric light. It also provides a measurement capability with the high resolution luminance data within a large field of view efficiently and quickly, which is not possible to achieve with a luminance meter.

• 조명전기설비학회논문지
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• 제28권1호
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• pp.9-15
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• 2014

This paper focuses on the heat gain of a lighting system, one of the most-used appliances in buildings, and its thermal effect within a low energy building. In this study, a dynamic thermal model of a lighting system is first established based on the first principle of thermodynamics. Then, thermal parameters of this model are estimated by experiments and an optimization process. Afterward, the obtained model of the system is validated by comparing simulation results to experimental one. Finally it is integrated into a low energy building model in order to quantify its thermal influence within a low energy building. As a result, heat flux of the lighting system, indoor temperature and heating energy demands of the building are obtained and compared with the results obtained by the conventional model of a lighting system. This paper helps to understand thermal dynamics of a lighting system and to further apply lighting systems for energy management of low energy buildings.

• 한국조명전기설비학회지:조명전기설비
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• 제8권4호
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• pp.38-45
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• 1994

본 논문에서는 신호감쇄 및 연집잡음(burst noise)이 존재하는 전력선 반송 채널에서 디지틀 데이터를 복조하기 위한 BPSK(Binary Phase Shift Keying) 복조기의 설계에 대하여 논한다. 이러한 BPSK 복조기의 실현에 있어서 반송파 동기호로는 소형화 및 안정화가 요구되며, 입력주파수의 변동에 대해서 낮은 위상 오차가 필요하게 된다. 이와 같은 요구조건을 만족하기 위해서 본 논문에서는 반송주파수가 10.4[kHz]이고, 전송속도가 110[bps]인 재변조방식의 BPSK 복조기를 설계 제작하였다. 설계 제작한 반송파 동기회로는 기존의 아날로그 소자로 구성되었던 승산기(multiplier) 및 지연회로를 PLL(Phase Locked Loop) IC로 대치하여 소형화 및 안정성을 확보하였으며, PLL회로 설계시에 주위온도 등을 고려하여 주파수 인입범위를 $\pm$4[kHz], 정상위상오차를 $\pm$60로 설정하였다. 기능시험 결과로부터, BPSK 복조기의 동작기능은 정상상태에서 설계조건에 만족함을 알 수 있었다.

• Journal of Electrical Engineering and Technology
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• 제10권1호
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• pp.436-442
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• 2015

In this paper, we develop an indoor localization device which embeds localization information into indoor light-emitting-diodes (LED) lighting systems. The key idea of our device is the use of the newly proposed "bit stuffing method". Through the use of stuff bits, our device is able to measure signal strengths even in transient states, which prohibits interference between lighting signals. The stuff bits also scatter the parts of the signal where the LED is turned on, thus provides quality indoor lighting. Additionally, for the indoor localization system based on RSSI and TDM to be practical, we propose methods for the control of LED lamps and compensation of received signals. The effectiveness of the proposed scheme is validated through experiments with a low-cost implementation including an indoor navigation task.