• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 Techno-Fair 및 합동춘계학술대회 논문집 전기물성,응용부문
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• pp.149-150
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• 2008

본 논문은 가로등 LED조명 설계를 위해 LED(Light Emiting Diode)소자 특성 분석 및 시뮬레이션을 통해 광특성을 개선하고자 하였다. $30^{\circ}{\sim}50^{\circ}$ 사이의 2차 렌즈 설계를 통해 조도 분포 특성 및 광분포 특성을 확인하였으며 LED 모듈의 간격 배열을 통해 램프를 설계 하고자 하였다. 그 결과 2차렌즈 35도 각도와 LED 소자간의 간격을 3Cm로 설정할 경우 최적의 광 특성을 확인할 수 있었다.

• 대한가정학회지
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• 제31권2호
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• pp.205-212
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• 1993

In order to research the display of the apparel store, 164 women's clothing in Taegu were investigated, from September 1. to October 31.1991. The result was as follows; 1. The perpendicular style of the show window glasses is widely used regardless of the store types. 2. The show window story is most frequently found at street-level in Taegu brand stores, but there are a few multi-storied show windows in National bland stores. 3. The open style background is used in a great part of Taegu brands, but the semi-open style is widely used in most National blands. 4. The arrangement of simular colors is used in a great parts of National brands, but the arrangement of different colors is used in many Taegu brands. 5. The base light and spot light is used at a high rate regardless of the stores, but the mannequin is more often used in National brands and Taegu brands.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 추계학술대회 논문집 전력기술부문
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• pp.323-325
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• 2002

Because of the progress of civilization, outdoor electricity facilities as a street light, signal light and standing signboard etc. have being increased rapidly. Therefore the application of underground distributing wires is largely expended. In this paper, capacitance for the kinds of 600V CV cable is measured and leakage current for underground cable is calculated. The measurement of capacitance is done which there are defects of cable sheath or not Calculated leakage current is applied to choose the circuit breaker and the like.

• Journal of information and communication convergence engineering
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• 제21권3호
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• pp.216-224
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• 2023

Smart lighting systems have become increasingly popular in several public sectors because of trends toward urbanization and intelligent technologies. In this study, we designed and implemented a web application platform to explore and monitor data acquired from lighting devices at Thammasat University (Rangsit Campus, Thailand). The platform provides a convenient interface for administrative and operative staff to monitor, control, and collect data from sensors installed on campus in real time for creating geographically specific big data. Platform development focuses on both back- and front-end applications to allow a seamless process for recording and displaying data from interconnected devices. Responsible persons can interact with devices and acquire data effortlessly, minimizing workforce and human error. The collected data were analyzed using an exploratory data analysis process. Missing data behavior caused by system outages was also investigated.

• 복식
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• 제65권6호
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• pp.112-132
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• 2015

Banya was a concubine slave of Shindon(辛旽) who was a powerful monk in late Goryeo Dynasty, as well as the mother of King Woo(禑王), a successor of King Gongmin(恭愍王). This study was undertaken to investigate the sources of costume for Banya. The study focused on the features of Buddhist service costume, street wear, and daywear for common women's costume during the prime age of the Buddhist culture. The study looked into Buddhist paintings, old documents, advanced research, and relics. There are three characteristics of historically investigated Buddhist service costume for Banya: Dallyeongpo(團領袍), long Jeogori made with black Ra(羅), and Jeogori with a long scarf. Skirt, under Jeogori, under skirt, Cho, Ra(羅), Neung (綾), Dan(緞), patterned ramie(紋紵), and Tapja(塔子) were included in all Buddhist service costume. And, street wear consisted of Women's Dapho(婦人搭忽), long Jeogori, skirt, underwear and black Ra beil(蒙首). Daywear consisted of Banbi(半臂), long Jeogori, and skirt, underwear made with cheap fabric, Ju(綢), ramie, and imported cotton. Plumper hair, silver comb and Biyeo, lining of light pink-colored thin silk(小紅薄絹), bronze openworked ornament that fixed the outerwear's opening, bronze needle case, Sutra box and heated gemstone could be matched for the Buddhist service costume. Bronze and heated gemstone could be used for ornaments of street wear and daywear. The investigation of ornaments was carried on by referring to presentation of overseas collections. Considering the limitation of the study on Goryeo costume due to the lack of research material, future studies including much more relics in oversea collections needs to be undertaken.

• 한국농촌건축학회논문집
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• 제15권3호
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• pp.17-24
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• 2013

This study examined and investigated architectural characteristics such as the use of buildings, the number of layers, and structure, and roof landscape characteristics such as roof types, materials, and color in rural villages which were located on the street on the assumption that the landscape of rural villages should be managed by considering visual aspects. The results were as follows. The commonest frequency was found in 'residence'(2/3) for the use of buildings and 'masonry structure'(2/3) for the structure. 'Wood structure' and 'light gauge steel structure(prefabricated structure)' were also commonly found. The results suggest that although many rural houses have partially improved by agricultural and fishery development projects and garden suburbs has been increased by city residents' desire for rural life, there have been still many old houses. Frequently used roof types were a gambrel roof and a hipped roof. Roof materials were mixed in several materials such as tiles, slate, panels, color steel plate, reinforced concrete, and asphalt shingles. Roof color was also mixed in several colors such as reddish N7 and N0.5 of Neutral color, 10R3/6 and 10R3/10 of R color, 7.5B4/10 and 7.5B7/8 of B color and 5G8/6 of G color. The result suggests that roof color impedes the landscape of rural villages on the street. Based on the results, some roofs of rural villages were improved by the support of the government or the local governments but there are still many old roofs. The mixture of improved roofs and old roofs mainly contributed to impeding the landscape of rural villages and it was probably caused by the lack of systematic landscape plans by individual improvement of buildings. Therefore, it is necessary to devise systematic landscape plans in consideration of local identity and neighboring environment. In particular, the guideline for roof color influencing a street landscape should be established.

• 한국통신학회논문지
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• 제40권1호
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• pp.233-239
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• 2015

LED 가로등의 수요가 증가하면서 LED 가로등의 효율성 제고 및 다양한 부가서비스를 위한 원격 제어 및 모니터링에 대한 수요가 지속적으로 증가하고 있다. 기존의 가로등 원격 제어 시스템은 전력선 통신망을 이용하는 유선 방식이 주를 이루고 있고, 무선 연결 방식이 존재하나 전송 속도의 제약이 있어 단순 제어 및 모니터링 이외의 부가 서비스를 지원하기에는 어려운 점이 있다. 따라서 본 논문에서는 무선랜 기반의 IEEE 802.11s 무선 메쉬 네트워크를 LED 가로등의 원격 제어 및 모니터링의 백본 네트워크로 사용하는 시스템을 제안한다. 무선 메쉬 네트워크를 사용함으로써 LED 가로등의 원격 제어 및 모니터링과 동시에 LED 가로등이 공공 Wi-Fi 액세스 포인트의 역할을 수행하게 한다. 이를 위해 Wi-Fi 통합형 LED 가로등 컨트롤러를 설계하고 시스템을 구현하고 Test Bed를 구성하여 성능을 평가 하였다. 본 논문에서 제안하는 시스템은 무선 메쉬를 활용하여 U-city의 인프라로의 역할 수행이 가능할 것으로 판단된다.

• 한국전자통신학회논문지
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• 제16권5호
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• pp.867-878
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• 2021

최근 도로조명시설에 영상 및 레이더 등을 부착하여, 실시간 교통데이터 수집과 교통 정보제공이 가능한 스마트 가로등에 대한 연구가 활발하다. 스마트 가로등 기술은 이에 따라 기존 대비 고해상도 검지, 판별, 조밀한 정보제공이 가능하다. 스마트 가로등의 장점으로 고해상도 정보전달매체로서 효과적으로 활용하기 위해서는 기존 중앙집중식 운영 전략과 다른 지점형 운영 전략이 요구된다. 본 연구는 스마트 가로등 기반사고 발생 전/후의 상황에 따라 구분된 공간적 범위에서 목적성을 달리하는 동적 정보 제공 전략, 해제 전략 및 그 기준에 대해서 제시하였다. 이를 통해 스마트 도로조명시설을 보다 효과적으로 활용 가능할 것으로 기대된다.

• Design & Manufacturing
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• 제15권3호
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• pp.50-55
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• 2021

Solar power generation, which is one of the methods of using solar energy, has a high possibility of practical implementation compared to other renewable energy power generation, and it has the characteristic that it can generate as much power as needed in necessary places. In addition, maintenance is easy, unmanned operation is possible, and power management can be performed more efficiently if operated in a hybrid method with existing electric energy. Therefore, in this study, numerical analysis using a computer program was performed to analyze the efficient operation and performance improvement of solar energy of the rotating condensing type solar LED street lamp. As a result, the two-axis tracking type could obtain 15.23 % more electricity per year than the fixed type, and additional auxiliary power generation was required for the fixed type by 19 % per year than the tracking type. As a result of computational fluid dynamics(CFD) simulation for PV module surface temperature prediction, the The surface temperature of the Photovoltaics(PV) module incident surface was predicted to be about 10℃ higher than that of the fixed type.

• 한국태양에너지학회 논문집
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• 제24권2호
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• pp.1-7
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• 2004

In this paper, the new improved method for photovoltaic system was studied available for a lighting load by measuring the state of charge of lead-acid batteries. Photovoltaic systems has been evaluated as one of the most new and renewable energy and especially, the Stand-Alone Photovoltaic system has been used to a street light, a road sign light, an air caution light, an emergency call. Many Stand-Alone PV system are installed by a group. Although the pre-installation cost of PV system is high and it has not been operated due to the absence of optimal management standards. In this paper, it is proposed a new operating method by the measurement of lead-acid battery's SOC with a Ah balancing.