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컴퓨터 비전과 딥러닝을 이용한 철도 시설 접근자 실시간 모니터링 시스템
박기준,반다리 비나약 한국철도학회 2020 한국철도학회논문집 Vol.23 No.1
The task of securing safety from terrorist attacks, which have recently been aimed at multiple civilian use facilities overseas, is drawing attention. This paper proposes a real-time intruder monitoring system that protects critical equipment and facilities of the railway system, which transports 37 million tons of cargo and 3.8 billion passengers per year. In integrating and testing the system, TensorFlow, OpenCV, and Amazon Web Service (AWS) IoT SDK were set up for the device part using Raspberry Pi, AWS IoT, and the Twilio API, which is based on AWS Lambda and installed at the AWS cloud on the server part. TensorFlow is applied with SSD+MobileNetV1, which learned with the COCO Dataset to detect the presence of intruders from a surveillance camera view of the secure area. In the event of intruder occurrence, SMS informs the security manager or safety manager of the area and assists their follow-up measures so that security threats by intruders can be prevented and damage minimized in the event of an emergency. In tests using plastic dummies, the system showed a 1.05 s response speed and less than 50% accuracy, in recognizing intruders; however, tests based on actual human bodies showed better recognition accuracy of 80% or more in a range about 10m from the camera.
신재생 에너지를 사용한 네팔 고산지역의 백신 저온 이송 체계 구축
김민수(Min-Soo Kim),반다리 비나약(Binayak Bhandari),반다리 프라티바(Pratibha Bhandari),퍼우델 시워라즈(Shiva Raj Poudel),이경태(Kyung-Tae Lee),추원식(Won-Shik Chu),김형일(Hyung-Il Kim),바타찬 아누즈(Anuj Bhattachan),모가살레 비탈(Vittal Mogasal 적정기술학회 2015 적정기술학회지(Journal of Appropriate Technology) Vol.1 No.1
백신은 감염성 질병을 예방하기 위한 주된 방법으로, 그 효능을 유지하기 위해서 2-8 o C의 온도 조건을 유지하는 것이 중요하다. 이를 위해, 백신 저온 이송 체계를 이용하여 백신을 생산 시점부터 소비 시점까지 적정 온도로 유지하여야 한다. 그러나, 개발도상국은 교통 인프라가 열악하고, 안정적인 전력 공급이 어렵기 때문에 적합한 수준의 백신 저온 이송 체계를 구성하기 어렵다. 특히, 고산지역인 네팔의 경우, 험준한 지형과 잦은 산사태로 인해 국가 전력망 구축이 미비한 실정이다. 반면, 높은 일사량, 강한 바람, 가파른 지형으로부터 충분한 신재생 에너지원(태양광, 풍력, 소수력) 을 확보할 수 있다. 본 연구에서는 네팔의 이러한 자연 환경을 고려하여 마카완푸르 지역의 팅간, 콜콥 마을에 독립형 신재생 에너지 시스템을 구축하였고, 이를 주 전력 공급원으로 하여 백신과 백신 캐리어용 아이스팩을 보관하는 냉장 고를 설치하였고, 부가적으로 비상시를 대비하여 태양광 발전 시스템을 설치하였다. 결과적으로, 신재생 에너지 시스 템을 이용한 백신 저온 이송 체계를 구축하였고, 마카완푸르 지역의 백신 접종 활동을 개선하였다. 또한 이를 이용하여 6명의 유아에 백신을 접종하였다. To maintain efficacy of vaccines, which are effective way to prevent infectious disease, vaccines should be stored between 2 to 8 o C. Hence temperature controlled supply cold-chain must be maintained from the origin of the vaccine to its consumption. However, in developing countries, it is difficult to maintain the cold-chain due to the lack of good transportation and reliable power supply. In the case of Nepal, in particular, central national grid cannot provide reliable power to the remote places because of difficult terrain, high altitude, frequent landslide and heavy investment cost in its infrastructure. However, on the other hand, higher insolation, strong wind and the steep slope terrain can provide enough renewable energy sources (Solar, Wind, Micro-hydro). In this study, considering the natural environment of Nepal, off-grid renewable energy system (RES) was installed on Thingan and Kholkop villages in Makawanpur district of Nepal. The primary power was supplied from the RES, in-addition a small photovoltaic system was installed for emergencies. The vaccines and ice packs for vaccine carriers are stored in the vaccine refrigerator. Finally, vaccine cold-chain using RES which can accommodate vaccines doses for about 6 babies are enabled for smooth door-to-door vaccination campaign in Makawanpur district.
Impact of Renewable Energy on Extension of Vaccine Cold-chain: a case study in Nepal
김민수,문정욱,류종하,김민식,비나약 반다리,박정은,Anuj Bhattachan,Vittal Mogasale,추원식,이선영,송철기,안성훈 적정기술학회 2020 적정기술학회지(Journal of Appropriate Technology) Vol.6 No.2
Renewable energy (RE) is essential to comprise sustainable societies, especially, in rural villages of developing countries. Furthermore, application of off-grid RE systems to health care can improve the quality of life. In this research, a RE-based vaccination supply management system was constructed to enlarge the cold-chain in developing countries for the safe storage and delivery of vaccines. The system was comprised of the construction of RE plants and development of vaccine carriers. RE plants were constructed and connected to health posts in local villages. The cooling mechanism of vaccine carriers was improved and monitoring devices were installed. The effect of the system on vaccine cold-chain was evaluated from the field test and topographical analysis in the southern village of Nepal. RE plants were normally operated for the vaccine refrigerator in the health post. The modified vaccine carriers had a longer operation time and better temperature control via monitoring and RE-based recharging functionality. The topographical analysis estimated that the system can cover larger region. The system prototype showed great potential regarding the possibility of a sustainable and enlarged cold-chain. Thus, RE-based vaccine supply management is expected to facilitate vaccine availability while minimizing waste in the supply chain.