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최호일(Choi, Ho-Il),강재영(Kang, Jae-Young),박정희(Park, Jung-Hee) 한국산학기술학회 2015 한국산학기술학회논문지 Vol.16 No.4
자동차에서 발생하는 BSR 소음은 감성품질로써 최근에 크게 대두되고 있다. 본 논문에서는 차량 시트에서 발생하는 BSR 소음에 대하여 두 가지의 시험법을 적용하였다. 첫째, sine sweep 가진 BSR 시험법을 이용하여 저주파 가진으로 인해 발생하는 고주파의 BSR 소음을 정량적으로 분석할 수 있음을 확인하였다. 둘째, 작동 시 주요 부위 가속도를 계측하는 작동 BSR 시험법을 이용하여 시트의 여러 조절 장치 중 하이트 조절 장치의 작동 BSR 소음원을 분석 할 수 있었다. 이때 내구 시험을 통해 소음원을 발생시켰으며 그에 상응하는 BSR 소음이 한 사이클 당 총 14회 발생하고 있음을 확인하였다. 본 논문 에서 제시된 두 가지의 시험법은 시트의 BSR 소음을 보다 효과적으로 분석할 수 있다. BSR noise from automobiles is largely issued in recent as an emotional quality. This study describes the two test methods for determining BSR noise occurred in automotive seat system. First, the sine sweep test is found to be an effective excitation method for determining BSR noise with high frequency. Second, BSR operation test is introduced in such a way that BSR noise during operation of seat height system is measured by several accelerometer at each 800 cycles until 6400 cycles. The periodic noise signal is captured during one cycle after many cycles of operation. Two test method presented in this paper can be analyzed more efficiently BSR noise of the seat.
비산업적 문화 콘텐츠를 활용한 도시재생의 지속가능성과 활성화 방안에 관한 연구 -서울시 서울책보고를 중심으로-
최호정(Choi, Ho-Jung),최정민(Choi, Jung-Min) 한국주거학회 2021 한국주거학회 학술대회논문집 Vol.33 No.2
With the increasing demand of the places which offer a variety of cultural activities and the emphasis on “sustainability”, cultures are widely utilized in urban regeneration. Furthermore, non-industrial urban regeneration which is not simply focused on the economic growth but creates people-oriented social values, can contribute to sustainability of a society. Therefore, this study aims to discuss about sustainability and revitalization of urban regeneration by analyzing the case of “Seoul Treasure Den for Books”. To achieve this research objective, questionnaire survey was conducted, targeting users of the bookstore. For this, 12 factors about the sustainability of Seoul Treasure Den for Books were extracted and by comparing relative importance and satisfaction, implementing IPA(Importance-Performance Analysis), this study attempts to consider some improvements with the current status and to suggest strategic operational plans for its sustainability.
최호길(Ho-gil Choi),김경덕(Kyung-Deuk Kim),이병관(Byung-Kwan Lee) 한국정보통신학회 2019 한국정보통신학회 종합학술대회 논문집 Vol.23 No.2
본 논문에서는 주행 중인 차량이 전방 차량들의 승객 배치 상황을 파악하고 위험 상황에서 인명피해를 최소화할 수 있는 제동 방향을 결정하는 Braking Redirection System(BRS) to minimize casualties in consideration of the passenger"s boarding situation in dangerous situations을 제안한다. 제안하는 시스템은 두 가지 모듈로 구성된다. 첫째, Passenger Situation Extraction Module(PSEM)은 차량에 탑승하고 있는 승객 상황을 추출한다. 둘째, Front Passenger Extraction Situation Module(FPSEM)은 차량에 장착된 카메라와 CNN을 사용하여 차량 전방의 이미지를 분석하고, 분석한 결과를 다른 차량에 전달한다. BRS는 PSEM에서 추출한 승객 배치 상황과 FPSEM에서 추출한 전방 승객 배치 상황을 Random Forest로 연산하여 위험 상황에서 인명피해를 최소화하는 제동 방향을 결정한다. 제안된 시스템은 차량 내부에 체압센서를 사용해 기존에 제안된 시각화 센서를 사용한 승객 탐지 방법보다 승객의 배치 상황을 자세하게 분석하고 높은 정확도를 보장한다. In this paper, the Braking Redirection System (BRS) to minimize the casualties in consideration of the passenger"s boarding situation in dangerous situations is proposed. The proposed system consists of two modules. First, the Passenger Situation Extraction Module (PSEM) extracts the passenger situation in the vehicle. Second, the Front Passenger Extraction Situation Module (FPSEM) analyzes the image in front of the vehicle using the camera and CNN installed in the vehicle, and delivers the analysis results to other vehicles. The BRS calculates the braking direction to minimize the casualties in the dangerous situation by calculating the passenger arrangement situation extracted from the PSEM and the front passenger arrangement situation extracted from the FPSEM as Random Forest. The proposed system uses a body pressure sensor inside the vehicle to analyze the passenger"s placement in detail and guarantee high accuracy than the passenger detection method using the previously proposed visualization sensor.
최호석(Choi Ho-seok) 우리문학회 2004 우리文學硏究 Vol.0 No.17
The present study purposed to investigate the economic principles of block print publishing. For this purpose, it examined the cultural background that promoted block print publishing and reviewed the entire process of block print publishing from an economic viewpoint.<br/> The cultural background of block print publishing is, first, the fact that books were not circulated sufficiently among the people because books were supplied mainly by the government. It is assumed that because the supply of books could not meet people’s demand, block print editions were published. Second, book trade was activated. As book trade had been active since the 16th century, block print books, which could be traded for business, were published. <br/> On the other hand, the economic efficiency of block print publishing in the late Chosun Dynasty was found in location and marketing strategies. The most important element in selecting the location of block print publishing was market demand. In this sense, the four central cities of book print publishing, namely, Seoul, Jeonju, Anseong and Daegu are regarded as the most suitable places. In addition, block print publishing was successful as it ‘analyzed the current situation’ and utilizing the strategy of ‘marketing mix’ properly. Considering these points, block print publishing was based on in-depth analysis of economic efficiency.