• 조명전기설비학회논문지
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• 제26권11호
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• pp.20-29
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• 2012

The outdoor lighting is provided for a variety of purposes, for work or recreation, for safety or security, for amenity and for advertising or display. But the effects of lighting on the natural environment can be difficult to quantify. At present, in many countries, various policies to manage the light trespass from outdoor light have been planned. For example, Model Lighting Ordinance(MLO) will allow communities to drastically reduce light pollution and glare and lower excessive light levels. The recommended practices of the IES can be met using readily available, reasonably priced lighting equipment. So, it this paper, we analyze the effect of road lighting on light trespass using by RELUX program. And then we consider the possibility of practical application of BUG rating in Korea.

• 한국태양에너지학회 논문집
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• 제32권spc3호
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• pp.199-206
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• 2012

The purpose of this study is to understand the change of impression by comparing the uniformity lighting with the compound lighting. In previous study, we proposed a light controlling method to harmonize daylight from a window and artificial lights from a ceiling and obtained the results to support our method. We referred this method as the Adjusted Compound-Lighting Model (AC Model). The experiment is carried out with the scaled-models and mock-up spaces that were supposed to be an office space. One is lit by the uniform lighting and the other by the compound lighting in each experimental space. In order to present varying illuminance distributions, the two variables were used in this study. Subjects were asked to evaluate the point of difference by semantic differential rating on their overall impression after comparing with two rooms. The results showed that the impressions of compound lighting were more positive score than that of uniformity lighting on the items of 'dim-bright', 'dislike-like', 'artificial-natural' and 'closed-open', and that there was no significant difference in impressions between two spaces on other items.

• 한국실내디자인학회논문집
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• 제21권6호
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• pp.129-136
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• 2012

As the importance of eco-friendly and energy saving issues are emphasized in lighting as consciousness about energy saving is elated worldwide, demand for natural resources such as gas increases, supply of LED lighting is spread. Owing to white LED's development and price fall. It is expected to LED High Luminance Emitting Diode. LED's brightness and long life-time that surpass fluorescent light in the latest as well as is used by back light source of thin film LCD, low electric power attrition rate by advantage do and widen the market at the world lighting lamp market that is potential market. Accordingly, study about suitability of LED lighting is activated but space that apply actual LED lighting fixtures yet is less and advanced researches about LED fixtures' applied apaces are slight compared to existing light source up to now because is not many on this. The result of the experiment shows similar tendency with the existing light sources'. Through a psychological reaction experiment in the LED lighting experiencing space that can control of color temperature and lighting level, this study is wished to use to the data for lighting design of space that LED lighting fixtures are applied hereafter.

• 한국산학기술학회논문지
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• 제18권11호
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• pp.72-77
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• 2017

현대 사회에서 조명은 인간 중심적인 자연 조명의 변화를 연출하고 에너지 소비 절감과 효율적인 관리를 위하여 IT 기술과 LED를 결합한 형태로 개발 되고 있다. 따라서 본 논문에서는 Arduino Due와 Bluetooth 및 Zigbee 무선통신 기술을 이용하여 3000K Warm LED와 6000K Cool LED로 구성된 LED 조명의 색온도 및 밝기를 제어할 수 있는 LED 조명 제어 시스템을 제안하였다. Arduino Due는 Duty rate을 조절하여 조명의 색온도를 여러 단계로 조절 할 수 있도록 하였고, 1:N 다중통신이 가능한 Zigbee 통신을 이용하여 많은 조명을 제어할 수 있도록 하였다. 그리고 Bluetooth 통신을 이용하여 스마트폰 어플리케이션으로 LED 조명을 손쉽게 제어할 수 있도록 하여 사용자의 편리성을 증대시켰다. 본 논문에서 구현한 무선통신 기반의 LED 조명제어 시스템은 3067K~5960K의 다양한 색온도 제어와 조도 제어를 통하여 인간 중심적인 조명을 연출할 수 있을 뿐만 아니라 소비전력을 줄일 수 있어 자연 친화적인 조명 시스템으로 활용될 수 있을 것으로 사료된다.

• 통합자연과학논문집
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• 제12권1호
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• pp.1-8
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• 2019

Smart pole is one of mega trend in smart city development. It has multi-function to get as much as data from the street to better city management. And smart street lighting of smart pole as core part of smart city development is being implemented by many cities in globally. Refer to the latest edition of Navigant Research's Smart City Tracker includes smart city projects in 221 cities, a quarter of which are deploying smart street lighting ranging from initial pilots to citywide and regional deployments that span tens and even hundreds of thousands of lights. The most important feature of smart street lighting solution is "Connectivity" through the IoT technology. In order to implement the smart city, we should have so-called intelligent watchdog and mesh networked post for keeping the various smart city technology development progress and operation properly. Smart street lighting solution could be main infrastructure as an enabler for a range of smart city applications. We can talk about the expected role of smart street lighting for the smart city development on this paper.

• 한국정보전자통신기술학회논문지
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• 제7권1호
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• pp.55-60
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• 2014

본 논문에서는 자연 영상에서 피부색 색상과 채도를 기초로 얼굴영역을 추출하고 얼굴의 특징요소를 추출하는 방법을 제안하였다. 제안한 알고리즘은 조명보정과 얼굴 검출 과정으로 구성되었다. 조명 보정 과정에서는 조명변화에 대한 보정기능을 수행한다. 얼굴 검출 과정은 20개의 피부색 표본 영상에서 색상과 채도를 특징벡터로 사용, 입력영상과의 유클리디안 거리를 구하여 피부색 영역을 추출하였다. 추출된 얼굴 후보영역을 CMY칼라 모델에서 C요소로 눈을 검출하였고, YIQ 칼라 공간에서 Q요소로 입을 검출하였다. 추출된 얼굴 후보영역에서 일반적인 얼굴에 대한 지식을 기반으로 얼굴 영역을 검출하였다. 입력받은 10장의 자연 영상으로 실험한 결과 100%의 얼굴 검출율을 보였다.

• 원예과학기술지
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• 제29권4호
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• pp.317-325
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• 2011

본 연구는 보광이 착색단고추의 수량과 품질에 미치는 영향을 구명하여 생산성과 품질향상을 위한 착색단고추 재배기술 확립의 기초 자료를 얻고자 수행하였다. 보광시간대별 광합성은 아침 일출 전 보광에서는 1.5-$3.0{\mu}mol{\cdot}CO_2{\cdot}m^{-2}{\cdot}s^{-1}$의 광합성속도를 나타냈으며, 일몰 후 보광은 0.5-$1.5{\mu}mol{\cdot}CO_2{\cdot}m^{-2}{\cdot}s^{-1}$의 광합성속도를 보여 일출 전 보광이 더 효과적인 것으로 나타났다. 보광에 따른 증산율과 기공전도도는 일출 직후 보광과 함께 높게 상승한 후 소등 후 다시 감소하였다. 보광에 따른 기공면적은 $32.2{\mu}m^2$로 나타났으며, 자연일장(무처리)은 $7.7{\mu}m^2$로 현미경상에서 거의 닫힘 상태를 보였다. 보광에 따른 생육특성에서 스피리트 품종의 경우 초장은 일출 전 후 3시간 보광에 비하여 일몰 후 3시간 보광이 크게 나타났으며, 보광처리가 자연일장에 비하여 모두 초장이 높은 것으로 나타났다. 평균 착과수는 일출 전 후 3시간 보광이 4.3개였고, 일몰 후 3시간 보광은 3.7개였으며, 자연일장은 2.6개로 보광처리가 자연일장에 비하여 착과수가 많았다. 과실의 당도는 보광처리에 따른 유의적인 효과는 없었으나, 수확시기에 따라서는 약간 차이가 있었다. 10a당 상품수량은 스피리트 품종의 경우 보광 처리시 11,605kg인 반면, 자연일장은 7.578kg이었다. 전력소모와 시설비에도 불구하고, 경제성 분석결과 순소득도 일출 후 3시간 보광이 자연일장보다 51%정도 높게 나타났다.

• KIEAE Journal
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• 제11권6호
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• pp.71-79
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• 2011

There are high recognitions on the importance of comforts in Elderly living environment, but the circumstance is that studies on seniors facility space itself are approached only in planning level, and studies on lighting environment which is significantly associated with the comfort in the indoor environment of seniors where they actually spend the majority of their time are not that active. This study was intended to deduce cozy bedroom environment to which existing elderly care facility can be improved by using light shelf the lighting system with the advantage of being able to serve both as building sun visor and lighting window simultaneously in order to analyze the interior environment of bedroom space of elderly care facility the indoor space where the aged spend the majority of their life and examine the directions for the improvement of existing building lighting system through remodeling and renovation. In this study, lighting performance analysis was done in a way that the windows of the bedroom unit in existing facility were set in southbound direction based on two standard types and were put under initial simulation with the use of Autodesk Revit 2011, and after the simulation results were converted to Green Building Studio gbXML file to be used in ECOTECT, Daylight Autonomy a dynamic simulation and static natural lighting simulation the existing method of calculating daylight factors were deduced through Ecotect Analysis 2011. In conclusion, exiting standard model was found in such a condition that the daylight factors for both type A and type B were above 5% the proper standard value, and required improvement. In case light shelf the natural lighting system was attached, the daylight factor was improved to proper standard value for type A, and also was improved above existing facility for type B.

• Asian-Australasian Journal of Animal Sciences
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• 제11권6호
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• pp.751-754
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• 1998

Heterophil (H) to lymphocyte (L) ratios and durations of tonic immobility (TI) were measured to assess stress and fear responses, respectively, in broiler chickens provided either 12 h of natural lighting (12L) or 12 h natural lighting and 12 h of supplementary lighting (24L). Birds illuminated 24L had greater H/L ratios and TI durations than their 12L counterparts. Neither age, sex nor cage level had significant effect on TI reactions.

• Journal of Biosystems Engineering
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• 제37권5호
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• pp.314-318
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• 2012

Purpose: This study was conducted to develop a measurement system for determining photosynthetic photon flux (PPF) distribution and illumination efficiency of LED lamps. Methods: The system was composed of a linear moving sensor part (LMSP), a rotating part to turn the LMSP, a body assembly to support the rotating part, and a motor controller. The average PPF of the LED lamp with natural cooling and water cooling was evaluated using the measurement system. Results: The PPF of LED lamp with water cooling was 3.1-31.7% greater than that with natural cooling. Based on the measured value, PPF on the horizontal surface was predicted. Illumination efficiency of the LED lamp was slightly increased with water cooling by 3.4%, compared with natural cooling. A simulation program using MATLAB was developed to analyze the effects of the vertical distance from lighting sources to growing bed, lamp spacing, and number of LED lamps, on the PPF distribution on the horizontal surface. The uniformity of the PPF distribution of the LED lamps was fairly improved with 15 cm spacing, as compared to the 5 cm spacing. By simulation, PPF of $217.0{\pm}27.9{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ was obtained at the vertical distance of 40 cm from six LED lamps with 12 cm spacing. This simulated PPF was compared to the measured one of $225.9{\pm}25.6{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$. After continuous lighting of 346 days, the relative PPF of LED lamps with water cooling and natural cooling was decreased by 6.6% and 22.8%, respectively. Conclusions: From these results, it was concluded that the measurement system developed in this study was useful for determining PPF and illumination efficiency of artificial lighting sources including LED lamp.