• 한국수소및신에너지학회논문집
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• 제24권6호
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• pp.566-572
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• 2013

In the present study, structure analysis has been performed to understand the deflection and stress distribution for a hybrid street-lamp having a vertical-axis wind turbine and a photovoltaic panel. Modal analysis is also evaluated to avoid resonance gerenerated by sychronism between a turbine and a lamppost. To analyze deflection, stress and frequency, general analysis code(ANSYS-Mechanical 13) is employed in the present work. Throughout structure analysis in the hybrid street-lamp, maximum stress is observed at the connecting position between a turbine blade and a blade supporter. Campbell diagram which is combined the natural frequency of turbine blades and blade passing frequency is presented to analyze a system resonance. It is found that the resonance of the system having a rotating turbine blade and a lamppost can avoid by the optimal selection of geometric parameters of a wind turbine.

• Wind and Structures
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• 제23권6호
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• pp.505-521
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• 2016

The objective of this study is to investigate numerically the effect of building roof shaps on wind flow and pollutant dispersion in a street canyon with one row of trees of pore volume, $P_{vol}=96%$. A three-dimensional computational fluid dynamics (CFD) model is used to evaluate air flow and pollutant dispersion within an urban street canyon using Reynolds-averaged Navier-Stokes (RANS) equations and the Explicit Algebraic Reynolds Stress Models (EARSM) based on k-${\varepsilon}$ turbulence model to close the equation system. The numerical model is performed with ANSYS-CFX code. Vehicle emissions were simulated as double line sources along the street. The numerical model was validated by the wind tunnel experiment results. Having established this, the wind flow and pollutant dispersion in urban street canyons (with six roof shapes buildings) are simulated. The numerical simulation results agree reasonably with the wind tunnel data. The results obtained in this work, indicate that the flow in 3D domain is more complicated; this complexity is increased with the presence of trees and variability of the roof shapes. The results also indicated that the largest pollutant concentration level for two walls (leeward and windward wall) is observed with the upwind wedge-shaped roof. But the smallest pollutant concentration level is observed with the dome roof-shaped.

• 디자인학연구
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• 제17권1호
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• pp.143-152
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• 2004

본 연구는 번화하다고 이야기 할 수 있는 가로가 번화하지 않다고 불리어지는 가로와 비교해서 어떠한 것들이 다르기 때문에 번화한 가로라고 인식되어지는지를 알아보고 그 결과를 토대로 번화함이 있는 가로를 형성하는 수법을 제안하기 위한 연구이다. 우선, 번화하다고 불리어지는 가로의 특성을 상업지역, 업무지역, 그리고 상업과 업무가 섞여있는 복합지역의 가로로 구분하였다. 이렇게 구분된 가로에서 번화함을 만드는 요소가 특정한 가로구조에 의한 것인지, 가로의 개성이 분명히 나타나는 보행공간의 디자인요소에 의한 것인지를 조사, 분석하였다. 조사방법과 범위는 한국과 일본을 대상으로 각각 유사한 성격을 가진 지역에서 번화하다고 불리어지는 가로를 대상으로 하여 기본적인 가로의 구조와 보행공간 안에서 가로를 번화하게 만드는 요소들 중에서 대표적인 물리적요소를 중심으로 시각적으로 인지되는 결과를 비교, 분석하였다. 그 결과 한국과 일본에서 가로의 특성에 따른 보행공간의 물리적인 요소의 디자인수법의 유사한 점과 차이점을 알아 낼 수 있었고 보행공간의 번화함을 만드는 물리적인 요소들을 어떻게 디자인하거나 배치하는 것이 바람직한지도 찾아 낼 수 있었다. 이렇게 만들어진 자료를 바탕으로 가로의 특성에 따라 번화함이 있는 가로의 조성을 위한 보행공간의 기본적인 형성수법을 제안하였다.

• 산업기술연구
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• 제30권B호
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• pp.75-81
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• 2010

This paper presents the development of LED street light lamp which is controled by central command system. This system includes a lamp unit controller, data repeater and command repeater as well as the LED lamps. These devices enable the individual power control and partial on/off control of the LED lamps by the control repeater through full duplex communication line. Also, they have the ability to control the brightness and period of on/off timing by detecting the car's existence. As a result of this development, it is founded that the performances of the system have been satisfied to apply for the actual road test.

• 한국자동차공학회논문집
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• 제23권1호
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• pp.1-10
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• 2015

In urban area, since multipath and signal attenuations frequently occur due to street trees, street lights and buildings, it is difficult to obtain accurate navigation solution using GPS. As these problems also impact negatively on the INS/GPS coupled system, implementing advanced transportation systems such as autonomous navigation system and Intelligent Transportation System (ITS) become quite hard. For this reason, to alleviate deterioration of navigation system performance in urban area, direction information extraction algorithm using vision system is proposed in this paper. 2D Finite Rate of Innovation (FRI) technique is applied to extract lane edges. The proposed technique is simulated using road images and feasibility of proposed technique is analyzed through the simulation results.

• 한국의류학회지
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• 제30권11호
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• pp.1519-1530
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• 2006

This study has surveyed and analyzed in 2005 S/S domestic men's street fashion by using the Web-SFAS system that was developed and completed in the earlier research. Total of 270 men who were sensitive to fashion were surveyed around 5 nationwide cities and 9 commercial zones. The analysis results of the questionnaire and image survey in 2005 S/S for each commercial zone was shown as follows. 1. The most interest in producing fashionable shape when they go out was in the order of clothes>hair style>shoes and it was found that the proper reason for visiting the commercial zone was to meet with friends>watching movies>shopping etc. 2. T-shirts were most preferred as upper garments and as for bottoms, blue jeans were preferred. Black, gray, and white colors were most preferred and blue color was most preferred primarily due to the preference for blue jeans. The color image was proven mainly modem and light tone, comfortable and casual items were preferred. An active comfort casual image emphasized with activeness by coordinating comfortable T-shirts or shirts with blue jeans were most preferred in 9 areas. 3. A clear difference was confirmed in color by commercial area. Blackish color was most prevalent in Daehakro whereas simple color was mostly shown around Hongik University area. Bright and unique colors such as green and violate were dominant at Dae-Gu Dongseongro, and basic colors such as white and black were preferred in Masan Hapseong-dong and Changwon Sangnam-dong. Through the results of nationwide street fashion survey, the each commercial zone has unique characteristics in fashion trend even in the same city, rather than the regional difference in Seoul and local city.

• 한국군사과학기술학회지
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• 제14권1호
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• pp.30-38
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• 2011

The modern warfare needs sharing tactical situation and Command and Control(C2) capacity. Lately, developing of C2 System for Soldiers has dramatically increased according to increase of asymmetric state of hostilities like a guerilla war or a street-to-street fighting. In this paper, we explain the concepts of C2 System for Soldiers and Smart Phone. We describe the proposed system composed of HMD equipment, Smart Phone, and exclusive software. This system provides that Soldiers have C2 capacity and share the image of a visual field. It also offers efficient military power disposition and understanding tactical situation in operations.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.115.5-115
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• 2002

In this paper, we introduce a system that detects all kinds of violations at a street intersection such as red light running, speed violation, stop line violation and lane violation by tracking individual vehicles. Two cameras are used for defecting violations. One is an analog camera for real-time tracking and the other is a digital camera for license plate reading. This system is connected to the traffic signal system controller and monitors the red, arrow, yellow and green phases of an approach. Two loops in the road are used to detect vehicle approach and speed. The system takes pictures of all vehicles passing a second loop and tracks the vehicles until they go out a street intersection...

• 한국전기전자재료학회논문지
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• 제33권3호
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• pp.186-193
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• 2020

We investigate a fog-detection CCT control system using low deck lighting as a solution to the forward visibility of pole-type street lamps employed on existing roads. The lighting standards were met with a light source that has less compared with those of pole-type street lamps. The results show that the transmission rate was increased by changing the color temperature by automatically recognizing fog in bad weather and minimizing the phenomenon of lighting. In addition, it was allowed to create a safer and more comfortable driving environment for drivers owing to flicker or light pollution of existing pole-type street lamps. As a result, if lighting is used at a lower level than pole-type street lamps, the accident rate caused by securing the driver's forward visibility can be reduced sharply and existing problems can be resolved.

• 한국방재안전학회논문집
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• 제14권2호
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• pp.25-33
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• 2021

본 기술은 기존의 빗물받이 및 도시형수로 시스템의 대체 가능한 기술로서 적용시 빗물은 빠르게 투수됨으로써 도시홍수를 저감할 수 있는 기술이다. 강우시 인도 방향의 제1 수로 공간으로 유입되는 빗물은 담배꽁초 등의 쓰레기는 유입되지 않고, 채움재를 통해 미세먼지 등의 오염물질을 감소시킨 후 지하로 투수시킬 수 있다. 제2 수로 공간으로 유입되는 빗물은 유속을 떨어뜨려 임시로 저류하였다가 배수관으로 배수시킴으로써, 배수관에서의 병목현상을 방지할 수 있는 도시형 수로 시스템 및 이의 시공방법에 관한 것으로 이를 통해 도시홍수 및 미세먼지 저감에 기여할 수 있을 것이다.