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장시웅(Si-woong Jang),박영식(Young-sik Park),성현용(Hyun-yong Sung),곽길봉(Gil-bong Kwak),김선남(Seon-nam Kim),김경진(Kyeoung-jin Kim) 한국정보기술학회 2009 Proceedings of KIIT Conference Vol.2009 No.-
본 연구는 차량 주변을 지능적으로 감시하는 자동차 주변 감시시스템에 관한 것으로, 자동차의 주행 및 주차 시 속도의 변화나 운전자의 요청에 의해 자동차 주변 지역에 관한 시야를 상황에 따라 달리하여 모니터링 함으로써 운전자가 안전한 주행 및 주차를 수행할 수 있게 하기 위한 것이다. 그러한 목적을 달성하기 위하여 본 연구에서는 차량의 주변부를 감시하기 위하여 차량의 외곽에 설치된 카메라의 각도가 지면으로부터 차량의 상부를 향하는 방향으로 변경될 수 있도록 제어하는 제어부, 카메라의 영상을 입력받아 차량주변의 영상을 생성하는 영상처리모듈, 영상처리모듈에서 생성된 영상을 출력하는 디스플레이를 포함하는 것을 특징으로 하는 지능형 자동차 주변 감시시스템을 제안한다. This study is on a vehicle surroundings monitoring system, which enables a driver to travel and park safely by monitoring vehicle surroundings, depending on the speed of vehicle and driver's control when traveling and parking. To achieve the aforementioned purpose, we propose an intelligent vehicle surroundings monitoring system, which consists of a control part, an image processing module and display module. Hence, the control module controls angle of camera to turn upward from the bottom to monitor vehicle surroundings. The image processing module merges the received images from cameras with the original vehicle image to display the vehicle’s surroundings in real time as if looking down from the sky.
Zinc Sulfide-selenium X-ray Detector for Digital Radiography
Park, Ji-Koon,Kang, Sang-Sik,Kim, Jae-Hyung,Mun, Chi-Woong,Nam, Sang-Hee The Korean Institute of Electrical and Electronic 2002 Transactions on Electrical and Electronic Material Vol.3 No.4
The high bias voltage associated with the thick layer (typically 500-1000 ㎛) of selenium required to have an acceptable x-ray absorption in radiography and fluoroscopy applications may have some practical inconvenience. A hybrid x-ray detector with zinc sulfide-amorphous selenium structure has been developed to improve the x-ray sensitivity of a a-Se based flat-panel digital imaging detector. Photoluminescence(PL) characteristic of a ZnS:Ag phosphor layer showed a light emission peak centered at about 450 nm, which matches the sensitivity spectrum of selenium. The dark current of the hybrid detector showed similar characteristics with that of a a-Se detector. The x-ray sensitivity of hybrid and a-Se x-ray detector was 345 pC/㎠/mR and 295 pC/㎠/mR at an applied voltage of 10 V/㎛, respectively. The purpose of this study was to evaluate the pertinence of a solution using a thin selenium layer, as a photosensitive converter, with a thick coating of silver doped zinc sulfide phosphor.
Oceanisphaera avium sp. nov., isolated from the gut of the cinereous vulture, Aegypius monachus
Sung, Hojun,Kim, Hyun Sik,Lee, June-Young,Kang, Woorim,Kim, Pil Soo,Hyun, Dong-Wook,Tak, Euon Jung,Jung, Mi-Ja,Yun, Ji-Hyun,Kim, Min-Soo,Shin, Na-Ri,Whon, Tae Woong,Rho, Jeong Rae,Park, Sun Duk,Shim, Microbiology Society 2018 International journal of systematic and evolutiona Vol.68 No.6