• Proceedings of the KSRS Conference
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• 2000.04a
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• pp.69-75
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• 2000

연안해역의 어장환경정비와 인공어초(Artificial Reef) 어장조성사업을 효과적으로 실시하기 위해서는 어장환경과 해양환경과의 관련을 종합적으로 분석하여 어초적지 지역을 선정하는 기법의 도입이 필요하다. 본 연구에서는 남해안 통영만 지역을 대상으로 인공어초 시설지 적지 선정에서 가장 중요하다고 판단되는 어초 적지조사 1단계 요소 중 수온, 클로로필, 투명도, 수심, 해저저질조건을 위성원격탐사 자료와 GIS를 이용하여 주제도를 작성하고, 인공어초 시설지 적지조건을 따른 가중치를 부여하여 공간분석을 실시함으로써 인공어초 시설 예정지에 대한 적지를 선정하였다. 따라서 위성원격탐사와 GIS를 이용한 인공어초 적지 선정기법을 어초의 적지선정에 있어 필요한 다량의 자료를 정성 및 정량적으로 D/B화하여 분석함과 동시에 가시화 함으로써 지방자치단체에서 보다 효율적인 어초시설의 종합적인 관리를 가능하게 하였다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.1
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• pp.116-124
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• 2009

This paper proposes a new Artificial-Intelligent(AI) Power Quality(PQ) diagnosis algorithm using Discrete Wavelet Transform(DWT), Fast Fourier Transform(FFT), Root-Mean-Square(RMS) value. The developed algorithm is able to detect and classify the PQ problems such as the transient, the voltage sag, the voltage swell, the voltage interruption and the total harmonics distortion. The 15.36[kHz] sampling frequency is used to measure the voltages in a power system. The measured signals are used for DWT, FFT, RMS calculation. For AI diagnosis of the PQ problems, a simple multi-layered Artificial Neural Network(ANN) with the back-propagation algorithm is adopted, programmed in C++ and tested in PSIM simulation studies. Finally, the algorithm, which is installed in MP PQ+256 with TI DSP320C6713, is proved to diagnose the PQ problems efficiently.

• Archives of design research
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• v.14 no.2
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• pp.57-66
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• 2001

This research was carried with emphasis on the technical contents of lighting design which had various knowledge system in the educational viewpoint. First of all, phisiolosical and physical factors were considered with the process of vision between human and light. Next, components of attributes in the lighting fixture were prescribed to analyze concept of the fixture. Finally, I proposed educational program in the instruction to meet the purpose of this research. As a result, in overall research concerning the basic direction and structure, instruction should have balance to reconcile theory and practice about lighting. Second, in terms of expansion of cognition about lighting, experimental education that is considered with interface is needed to make practical verification through relationship with man-made environment and scientific data.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.13 no.2
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• pp.7-11
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• 1999

In this paper, the result of study in artificial lighting uniformity ratio yield Irethod subjtrt to lecture room are reported. It is desirable that the aWication of equation $\circled1 U=Ei/Ex\times100$ cannot be used to the rrean value in place to be efftrtive of light and darkness. And it is desirable that the awlication of equatioo $\circled2 U=Ei/Ea\times100$ or equation $\circled3 U=(Ea-Ei)/Ea\times100$ be used to the rrean Value equality illumination conditioos. Also, requiring preparation of judgarent standard, uniformity ratio equation agree with actual circumstances in this country. It must be considerai intensity of illumination and specificity of space in established standard.andard.

• Journal of Environmental Impact Assessment
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• v.28 no.1
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• pp.63-70
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• 2019

Artificial lighting is an essential part, but it causes light pollution due to unnecessary or excessive use of light. Light pollution has negative effects such as power waste, adverse health effects, destruction of the ecosystem. But currently, light pollution is managed only post-management. The purpose of this study is to standardize methods of environmental impact assessment focusing on light pollution to effectively manage and reduce the negative effect of areas that may cause light pollution in advance.

• Journal of Broadcast Engineering
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• v.24 no.1
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• pp.87-96
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• 2019

Improvement of low-light image mainly focuses on the contrast enhancement. Many researches have been carried out for brightness enhancement, contrast improvement and illumination reduction. Recently, the aforementioned approaches have been replaced by artificial neural networks. This paper proposes a methodology that can replace the Retinex-based reflectance image acquisition by deep neural network. Experiments carried out on 102 low-light images validated the feasibility of the replacement by producing PSNR=30.8682(db) and SSIM=0.4345.

• Broadcasting and Media Magazine
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• v.25 no.1
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• pp.20-27
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• 2020

최근 모바일 기기를 위한 카메라 관련 기술이 발전하면서 취득할 수 있는 영상의 화질 또한 크게 향상되고 있다. 그러나, 일상 생활에서 빈번히 발생하는 다양한 실내외 불규칙한 조명 조건 및 저조도 환경은 여전히 영상 화질 저하를 야기한다. 본 고에서는 이러한 문제를 해결하기 위해 최근 널리 연구되고 있는 심층신경망 기반 영상 화질 개선 연구의 최신 동향을 소개하고자 한다. 먼저, 다양한 최적화 기법을 바탕으로 영상 내 조명 성분을 추정하고, 이를 개선하는 방법들에 대해 간략히 설명한다. 또한, 영상 인식, 객체 검출 등에서 뛰어난 성능을 입증한 합성곱 신경망 구조를 기반으로 영상의 잠재적 특징을 효과적으로 검출한 후 이를 바탕으로 개선된 영상을 생성하는 방법에 대해 설명한다. 다양한 데이터셋에 대한 실험 결과를 통해 인공지능 기반 영상 화질 개선의 우수성을 보인다.

• Journal of Institute of Convergence Technology
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• v.1 no.1
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• pp.29-33
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• 2011

This study is performed to investigate the effect of the artificial light for room lightening. To do that, the experiments were done using the black room with 1m3 and performed to show the effect of the length between the room and light source and light intensities as LUX. The LUX of 18 sites in the room was measured using LUX meter. The length between the room and the light source was chosen as 500mm, 1000mm, and 1500mm and the light intensities was 3 levels. The results were shown the distinct difference between the part directly projected through the light path and non-directly projected. So, the light delivery path have to be modified for next step research. The results were very sensitive for the part directly projected through the light path. This study showed the basic results for room lightening using light source to simulate the solar lightening and was worth in a strict sense as fundamental study.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.20 no.2
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• pp.8-15
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• 2006

To reduce costs and address other practical concern related to architectural lighting, we have been involved in various aspects of advanced daylighting design and control. If we look toward future building trends, we see that the advanced has already successfully deployed such complex lighting control systems. This paper takes a broad view of what advanced manufacturers have done to develop energy efficient lighting control technologies such as sensors, lumen maintenance, time of day scheduling, peak demand reduction and so forth. First of all strategies, daylighting controls would also need to be commissioned to respond to the specific daylighting signature of the zone. To translate the daylight in term of the amount of energy savings, an electric lighting system is designed and automatic on-off control system integrated with the contribution of daylighting has been applied to the operating of the artificial lighting. The lighting analysis program, Lumen-Micro predicts the optimal layout of conventional fluorescent and incandescent lighting fixtures to meet the designed lighting level and calculates unit power density, which translates the demanded amount of lighting energy.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.4
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• pp.1474-1479
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• 2012

Rotational smart lighting control system provides artificial light to plants on planting board by rotational lighting system. As the lighting system of existing plant factory has high cost problem due to the installation for many lighting equipments, the lighting system was developed to rotate less number of lighting equipments to reduce cost. In this paper, the illuminance, luminous flux and photosynthetic photon flux density(PPFD) that plants need to grow were calculated. And the light intensity at each measured location considering the rotational speed of blade were analyzed by the simulation and the experiment.