• Journal of Power Electronics
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• 제18권4호
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• pp.1278-1292
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• 2018

Inductive power transfer (IPT) technology allows for charging of electric vehicles with security, convenience and efficiency. However, the IPT system performance is mainly affected by the magnetic coupling structure which is largely determined by the coupling coefficient. In order to get this applied to electric vehicle charging systems, the power pads should be able to transmit stronger power and be able to better sustain various forms of deviations in terms of vertical, horizontal direction and center rotation. Thus, a novel cross-shaped magnetic coupling structure for IPT charging systems is proposed. Then an optimal cross-shaped magnetic coupling structure by 3-D finite-element analysis software is obtained. At marking locations with average parking capacity and no electronic device support, a prototype of a 720*720mm cross-shaped pad is made to transmit 5kW power at a 200mm air gap, providing a $1.54m^2$ full-power free charging zone. Finally, the leakage magnetic flux density is measured. It indicates that the proposed cross-shaped pad can meet the requirements of the International Commission on Non-Ionizing Radiation Protection (ICNIRP) according to the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA).

• 대한토목학회논문집
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• 제36권1호
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• pp.115-120
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• 2016

본 논문에서는 철도역 연계서비스수준 평가지표 설정 및 적용방안 도출을 위하여 전국 철도역 중 56개소를 선정하여 이용객 접근시간 조사를 수행하고 이를 기반으로 KTX, 일반철도의 연계영향권과 서비스수준(LOS) 평가지표를 도출하였다. 또한 도출된 평가지표를 활용하여 56개 철도역의 연계서비스수준을 평가하였다. 평가 결과 KTX, 일반철도 모두 일부 권역을 제외하고 연계서비스 수준이 모두 "E"등급으로 매우 열악하다는 것을 알 수 있었다. 마지막으로 연계체계 개선을 위한 정비방향을 연계시설 확충, 연계노선의 확충, 혼잡구간 교통체계 개선, 개인교통수단 이용자 및 연계교통시설 이용자를 위한 해당시설의 용량 확충 방향 등을 제안하였다.

• 한국실내디자인학회논문집
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• 제25권5호
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• pp.42-54
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• 2016

The purpose of this study is to provide a reference for stage planning by analyzing current state of major theaters' stage space and understanding feedback from directors belonged to theaters. Each room in total 18 theaters' stage facilities was measured and their usage and requirements were analyzed on the spot. In addition, each director provided their experiential knowledge about appropriate stage composition for musical performance. The findings are as follow: under stage machinery is not needed for musical. Tour teams prefer to use their own show-deck for set conversion. On the other hand, over stage flying system needs to be able to deal with dense, fast, and accurate scene change. The size and location of the motor room needs to be carefully considered. The number of set battens is directly linked up with the size of the motor room, which should be located lower than the gridiron. As stage sets get bigger and complicated, the number of works at the gridiron is also increasing. The grating floor has to have enough strength coping with machines lifting heavy sets. Most sound control for musical performance is being done at F.O.H. these days rather that in the sound control room. It should equip enough work area and related infra especially for tour teams. 1st gallery needs to have enough effective width, power infra for lighting fixture, and strong guardrail. Lastly, the whole process of parking-unloading-transporting equipments and sets from loading dock to stage and vice versa needs to be efficient, and this has to be carefully considered from early stage of planning.

• 정보처리학회논문지B
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• 제14B권1호
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• pp.13-22
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• 2007

본 논문은 극장이나 공연장에 설치된 CCTV 혹은 캠코더를 통해 입력받은 영상으로부터 패턴비교를 이용해 관객의 수를 카운팅하는 방법을 제안한다. 극장이나 공연장의 환경은 주로 어둡고 관객의 수가 많기 때문에 기존의 객체 검출에 의한 방법으로는 정확한 실시간 카운팅이 어렵다는 문제점을 가지고 있다. 따라서 본 논문에서는 극장이나 공연장의 좌석이 고정되어 있다는 점을 이용해 각 좌석마다 관객이 존재하지 않는 기준영상을 획득한 후 카운팅 하고자 하는 입력 영상의 동일 좌석 영상과 패턴비교를 이용해 각 좌석에서 관객의 유무를 판단한다. 특히, 본 논문에서는 기존 방법들이 지닌 조명 변화이나 잡음에 민감한 문제를 해결하기 위해 상호 보완적인 성능을 보이는 두 가지 특징인 크기투영과 Walsh-Hadamard Kernel에 기반한 패턴비교 방법들을 효과적으로 결합함으로써 조명이나 잡음의 영향을 최소화하고 정확한 카운팅을 가능하게 한다. 제안된 방법은 실제 극장에서 획득한 영상에 대한 실험을 통해 정확한 시스템 성능을 검증하며, 제안된 방법을 주차장에서 빈 주차공간을 확인하는데 적용해 봄으로써 다른 분야로의 적용 가능성을 확인한다.

• 산업경영시스템학회지
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• 제42권4호
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• pp.23-30
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• 2019

Automobiles are largely divided into passenger cars with less than five passengers and commercial vehicles such as construction machines, trucks, mixers, special lorries, and large buses. Automobile maintenance companies are also divided into passenger cars and commercial vehicles. Because commercial vehicles are the livelihood vehicles of individual carriers engaged in cargo transportation, passenger transportation, and construction, fast and accurate maintenance is important. Access to the expressway is also important because the car is large and uses highways. In addition, the time required for troubleshooting is long, so sufficient space must be secured for parking the vehicle, and ease of entry and exit of the vehicle in the maintenance shop should be fully considered. For this reason, commercial vehicle maintenance companies have higher initial investment costs than car maintenance companies, and it is difficult to supply and maintain maintenance personnel. Therefore, it is necessary to carefully examine and analyze various related factors for successful commercial vehicle maintenance company selection. However, most existing commercial vehicle maintenance companies often choose their location based on the empirical judgment of the founder, the customs and the case, without a clear analysis. In this study, we show how to derive the location selection factors to be considered when establishing professional maintenance company for commercial vehicles and to select the optimal location by using AHP (Analytic Hierarchy Process) method.

• 대한안전경영과학회지
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• 제18권1호
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• pp.1-8
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• 2016

This study was conducted by survey and inspection of stair passage leading lights in shopping buildings which are more than 5 stories and have an underground parking lot located at Pyeongtaek-si and Seongnam-si. Number of shopping building for this study is 30 and of stair passage leading light inspected by two lights in each shopping building is 60. The result of this study is that the type of installed leading lights is LED(77%), and 60% of leading lights has problem such as no cleaning, scratch and discoloration, etc. The height of installed leading lights meets the fire law which is less than 1m from the floor. Visible condition of leading lights is good except some leading lights which have a little visible problem due to banner advertisement. 37% of standby power has flickered and went out. 93% of total leading lights meets the fire law which is more than 1lux from 0.5m distance, but cold cathode fluorescent lamps(CCFLs) have the problem which not meets proper brightness level based on fire law. In additional measurement result, zero lux of leading lights is 32%(from 1m distance), 68%(from 1.5m distance) and 98%(from 2m distance). Leading light is very important facility because it is eyes and guide when emergency. Therefore, proper fire facility operating function inspection and total detailed inspection are important to keep the good condition of leading light except simple visual check, and also improvement in law system of type approval, fire construction inspection and illumination level will be needed.

• 한국ITS학회 논문지
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• 제10권2호
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• pp.66-76
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• 2011

관광지ITS는 해당 관광지역에 관련한 관광과 교통(명승지, 도로망, 주차, 소요시간 등)에 관한 정보를 제공하는 시스템이다. 하지만 관광주유행동의 관점에서 관광지 정보제공 시스템이 아직 충분히 고려되지 못하고 있다. 관광주유행동의 의사결정에 있어 다양한 정보 니즈가 존재하기 때문에 정보이용과 주유행동의 관련성이 매우 중요하다. 본 연구는 관광지ITS구축을 향한 기본적인 정보니즈 분석과 기존 주유행동 모형 재구축의 기초적 시사점 도출을 목적으로 후지5호 관광지의 정보이용과 주유행동의 관련성 분석을 수행하였다. 구조방정식을 이용한 관련성 분석결과, 주유행동의 단계에 따른 정보이용이 지역인지도와 주유행동에 영향을 미치고 있었다. 이는 관광주유행동분야에서도 정보에 의존하고 있다는 점을 밝히고 있다. 또한 이러한 결과는 관광지ITS에 관한 기초적 정보를 제시하고 있다.

• KIEAE Journal
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• 제13권5호
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• pp.79-88
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• 2013

This study creates the evaluation criteria to analyze the $CO_2$ emission quantity in the complex of apartment house among domestic buildings and proposes how to calculate the $CO_2$ emission quantity by the only simple information of apartment house. The study shows that in order to create the index of carbon emission evaluation criteria, $CO_2$ emission quantity for its input materials in these 27 apartment houses are 445,412g-$CO_2/m^2$ for apartment building, 474,322g-$CO_2/m^2$ for the basement parking lot, 483,523g-$CO_2/m^2$ for welfare facility, 729,957g-$CO_2/m^2$ for sales facility, 743,560g-$CO_2/m^2$ for other facility, 26,782g-$CO_2/m^2$ for public facility, 43,659g-$CO_2/m^2$ for landscape, 1,113g-$CO_2/m^2$ for indoor facility, 11,251g-$CO_2/m^2$ for outdoor facility and 891g-$CO_2/m^2$ for common temporary based on the average $CO_2$ emission by facility. We can also see the analysis data that in case of using the selected factors only, the rate of error is 7.51% comparing with the emission quantity by using simplified LCA method this study suggests for the whole range of apartment houses and the rate of error is average 3.24% using selective and main materials. And this it is evaluated that we can get the result which is similar to the actual $CO_2$ emission quantity with only the simple information about the apartment house.

• 농촌계획
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• 제23권1호
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• pp.11-19
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• 2017

The purpose of the study was to investigate how the Cheongwon Organic Life Festival, a rural festival, affects the farmers of the local farms in Cheongju. Based on grounded theory, this study analyzed the objective using a qualitative research program, the Nvivo11 program. The data was collected through in depth interviews from 13 farmers who participated in the Cheongwon Organic Life Festival, and were also residents of Chungcheungbuk-do. The roles of the local festival expected by farmers, were the sale of local agricultural products, local public relations, regional revitalization, a sense of pride as a farmer, exchange of business ideas for sales of agricultural products, and a line of direct communication between farmers and consumers. The farmers who participated in the Cheongwon Organic Life Festival insisted that sales should rise. The results showed that the farmers who participated in the festival felt socially and psychologically stable while participating. The programs at the Cheongwon Organic Life Festival include a concert, hands on involvement, and agricultural sales, which have a direct influence on both sales and attracting visitors during the local festival. Farmers who participated in the Cheongwon Organic Life Festival asked for the improvement of the overall operation of the festival, including the problems with the admission tickets, parking, arrangement of facilities, festival venue, time, and etc. The suggested improvements for the Cheongwon Organic Life Festival focused on the quality certification system of agricultural products, as well as the organic farming of products, thereby to gain trust from the consumers.

• 한국습지학회지
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• 제9권2호
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• pp.9-20
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• 2007

환경부에서 국내 4대강에 도입한 수질오염총량관리제는 점오염원뿐만 아니라 비점오염원의 관리를 통해 주요 상수원수인 4대강의 수질을 개선하고자 함이다. 비점오염원의 주요 근원은 토지이용이며, 개발사업은 토지이용의 변화를 의미하고 비점오염물질의 유출 증가를 의미한다. 따라서 본 연구는 현재 국내에서 유일하게 수질 오염총량관리제가 도입되어 개발할당량이 주어져 있는 한강수계의 리조트 개발사업에서 개발계획에 따른 토지이용의 변화와 더불어 유출이 증가하는 비점오염물질의 양을 산정함으로써 효율적인 비점오염원 관리방안을 수립하고자 한다. 이러한 목적을 달성하기 위하여, 개발사업 전후의 토지이용에 따른 비점오염물질의 발생 및 배출부하량 변화를 산정하였으며, 이를 근거로 비점오염물질 유출 관리가 요구되는 토지이용을 선정하였다. 또한 그 결과를 이용하여 적정 비점오염물질 관리방안(최적관리방안)을 수립하고자한다.