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지능형 자동차용 FOT 데이터베이스에 기반한 한국과 미국 운전자의 주행특성 고찰
정창현(Changhyun Jeong),이영석(Youngseok Lee),최성진(Sungjin Choi),정도현(Dohyun Jung),이강원(Kangwon Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Recently, automobile has been developed as a fusion technology product with many electronic parts and telematics equipments and many ECUs. Automobiles are becoming more intelligent and safe vehicles, assemblies of advanced technology by customers’ demand. A study on the natural driving pattern and driver"s response in various traffic and road condition is essential to develop the driver friendly intelligent vehicle. We introduced the field operational test (FOT) database, which could be used as driving and road conditions collection for researches about driver friendly intelligent system, Human Vehicle Interface(HVI) system and economic driver model and so on, which has been built by Korea Automotive Technology Institute(KATECH) from 2 years ago. Also, we compared Korean and American driving characteristics based on FOT database. American driving data came from UMTRI(University of Michigan Transportation Research Institute) RDCW(road departure crash warning system) FOT database. We showed macroscopic observation results about driving tendency of both database in this paper and we will present detail analysis results in the close future.
CdS/ZnS 양자점 기반 플라스틱 섬광체 제작 및 성능평가
민수정 ( Su Jung Min ),강하라 ( Ha Ra Kang ),이병채 ( Byung Chae Lee ),서범경 ( Bum Kyung Seo ),정재학 ( Jae Hak Cheong ),노창현 ( Changhyun Roh ),홍상범 ( Sang Bum Hong ) 한국화학공학회 2021 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.59 No.3
현재, 감마 핵종 분석은 주로 무기섬광체 또는 반도체 검출기를 활용하여 여러 분야에 사용되고 있다. 이러한 검출기는 분해능이 좋지만 크기가 제한적이며, 가공성이 낮고 경제성이 플라스틱 섬광체보다 낮다. 따라서, 나노물질인 양자점과 플라스틱섬광체의 장점을 이용하여 양자점 나노물질 기반 플라스틱 섬광체를 개발하였다. 가장 많이 활용되고 있는 Cd계열 물질인 CdS/ZnS 양자점을 플라스틱 매트릭스에 교반하여 제작하였으며, 이를 <sup>60</sup>Co핵종 대상 계측 실험을 하여 상용플라스틱 섬광체의 성능과 비교 분석하였다. 상용플라스틱 섬광체 대비 CdS/ZnS 양자점 기반 플라스틱 섬광체가 20~30% 높은 효율을 보였다. 이는 의료분야뿐만 아니라 원자력 해체분야에서도 방사능 분석기로 활용 가능할 것으로 판단된다. Currently, gamma nuclide analysis is mainly used using inorganic scintillators or semiconductor detectors. These detectors have high resolution but there are less economical, limited in size, and low process ability than plastic scintillators. Therefore, quantum dot-based plastic scintillator was developed using the advantages of the quantum dot nanomaterial and the conventional plastic scintillator. In this study, efficient plastic scintillator was fabricated by adding CdS/ZnS based on the most widely used Cd-based nanomaterial in a polystyrene matrix. In addition, the performance of the commercial plastic scintillator was compared and it was analyzed through radiological measurement experiments. The detection efficiency of fabricated plastic scintillator was higher than commercial plastic scintillator, EJ-200. It is believed that this fabricated plastic scintillator can be used as a radioactivity analyzer in the medical and nuclear facility fields.