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딥러닝 기반 실시간 픽셀 단위 주행 가능 영역 검출 및 격자 지도 생성 알고리즘
김경수(Kyeongsu Kim),곽기성(Gisung Gwak),이재인(Jaein Lee),황성호(Sung-Ho Hwang) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Self-driving, a core technology that leads the Fourth Industrial Revolution era, aims to create a route and driving safely to the target location based on information obtained through various sensors. In real-world driving environments, all processing processes are guaranteed real-time and require high accuracy for different environments. In this paper, we implement a deep learning model that detects drivable areas for real-time autonomous driving and generates noise-removed grid map. The pixel-level segmentation model for detecting drivable area is using BiSeNet v2 with guaranteed real-time and excellent performance. A vehicle simulator was constructed to reflect the vehicle characteristics and various environments of the BRT. Data for deep learning models is used driving videos from vehicle simulator and the Cityscapes dataset. The grid map generation algorithm proposed in this paper eliminates noise for the drivable area, increasing the IoU of the driveable area by up to 3%.
이현경 ( Hyeongyeong Lee ),김경수 ( Kyeongsu Kim ),최동필 ( Dongphil Choi ),최원종 ( Wounjong Choi ) 한국보건정보통계학회 2020 보건정보통계학회지 Vol.45 No.2
Objectives: The occurrence of injury causes physical and mental health problems and socioeconomic losses. Identifying the extent of injury to farmers is an important basic data for preventing, treating and rehabilitating injuries to farmers. The purpose of this study was to comparison the injury rate and injury ratio by farmers and non-farmers by year, and to analyze the impact factor of injury occurrence. Methods: The data sources used in this study are Community Health Survey as national accreditation statistics. The annual injury rates were estimated for farmers and non-farmers aged 19 or older in the past year occurred during daily life and work. The annual injury rates of farmers and non-farmers were weighted according to the guidelines for using raw data. The analysis method was frequency and percent analysis, weighted fraction (%), standard error (SE), chi-square, logistic regression. Results: The annual injury rate of farmers was 8.6% (odds ratio, OR=1.14, 95% confidence interval, 95% CI=1.04-1.24) in 2013, 5.9% (OR=1.24, 95% CI=1.13- 1.36) in 2014, 9.1% (OR=1.23, 95% CI=1.14-1.33) in 2015, 9.5% (OR=1.23, 95% CI=1.14-1.33) in 2016, 8.9% (OR=1.33, 95% CI=1.23-1.44) in 2017. The annual injury rate of non-farmers was 6.9% in 2013, 4.9% in 2014, 7.6% in 2015, 7.9% in 2016, 6.6% in 2017. Conclusions: The annual injury rate of farmers was higher than non-farmers. The annual rate of injury for farmers is about 1.2 times higher than non-farmers each year. For farmers at high risk of injury, safety education related to injury prevention is continuously needed.
인터페이스 통신 기반 개발 환경에서의 효율적인 위험도 분석 및 생산성 향상 시스템 개발
송태일(TaeIll Song),홍충선(ChoongSeon Hong),김경수(KyeongSu Kim),최홍석(HongSuk Choi),정원식(WonSik Jeong),원종섭(JongSeop Won) 한국정보과학회 2016 정보과학회 컴퓨팅의 실제 논문지 Vol.22 No.12
엔터프라이즈 환경의 시스템은 다양한 시스템을 활용하여 업무를 처리하고, 인터페이스 시스템을 이용하여 메시지를 교환한다. 인터페이스 통신 기반의 환경에서는 업무 복잡도가 증가할수록 많은 시스템과 인터페이스 시스템이 연계한다. 시스템 연계도가 증가할수록 개발 투입 인력이 증가하며, 이에따라, 정보 불일치 발생, 표준 미 준수 등 다양한 개발위험이 발생한다. 본 제안은 이러한 문제를 해결하기 위해 메시지 기반의 인터페이스 시스템의 정보를 집중, 관리하는 시스템을 제안한다. 시스템을 통해 인터페이스 시스템의 정보 통합 관리, 메시지 정보 배포, 표준 코드를 생성, 위험 관리 및 회피 방법을 제안한다. 제안된 시스템을 통해 개발환경의 정보 불일치 방지, 위험의 분석 및 회피, 자동 정보 배포 및 코드 생성이 가능하며, 궁극적으로 개발환경의 효율성 및 위험을 회피 할 수 있다. The enterprise environment, various interface systems are utilized for business processes and for exchange of messages. In the interface communication environment, as business complexity increases, the interface system is connected with numerous systems. With increasing number of linked systems, there is a proportional increase in the workforce, leading to a rise in numerous risks (inconsistency of information, non-compliance with standards, etc.). To solve the problem, we propose a system for managing and centralizing information of the message based interface system. The proposed system enables information integration management, message information distribution, standard code generation, risk management and risk evasion. Using the proposed system, the in development environment user can prevent inconsistent information, analyze risk, avoid risk, distribute information automatically and create a standard code. Ultimately, there is an increase in user productivity and it is possible to evade the risks involved.
백승윤(Seungyun Paek),서자원(Jawon Seo),송덕희(Deokhee Song),김경수(Kyeongsu Kim),홍재표(Jaepyo Hong),박성순(Sungsoon Park) 한국추진공학회 2010 한국추진공학회 학술대회논문집 Vol.2010 No.11
전투기에 장착되는 정보수집용 포드의 냉각 장치인 ACM에 대한 성능 시험평가를 수행하였다. 시험평가 대상인 ACM은 역 브레이튼 공기 사이클로 작동되는 터보기기로서, 항공기의 비행속도에 의한 램 공기를 에너지원으로 사용하여 추가적인 에너지의 공급 없이 냉각 기체를 발생시킨다. 또한 습기에 민감한 전자장비의 냉각에 이용하기 위하여 열교환기를 함께 구성하였다. 성능시험을 통하여 개발 대상 ACM 및 열교환기는 요구 성능을 만족함을 확인하였다. A performance test of an air cycle machine with an air to air heat exchanger was performed. The air cycle machine designed for avionics cooling in a fighter"s external pod is a small turbo machine operated on the reverse Brayton air cycle driven by captured ram air which is the source of driving energy and it can be used as cooling fluid going through electronics in the pod during the flight. The air to air heat exchanger was also used to avoid moisture for avionics. The performance test have verified that the developed ACM and heat exchanger meet the design requirements.