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EdgeCPS를 활용한 사용자 인증 및 임무 자동화를 통한 드론 배송 시스템 개선
조민근,백민기,최으뜸,고동범,강성주,이성진,MinGuen Cho,MinKi Beak,EuTeum Choi,DongBeom Ko,SungJoo Kang,SeongJin Lee 대한임베디드공학회 2023 대한임베디드공학회논문지 Vol.18 No.4
Currently, various companies are actively participating in research and development of drone delivery services. Existing studies do not comprehensively provide integrated functions for future drone delivery services such as mission automation, customer verification, and overcoming performance limitations, which can lead to high manpower demand, reduced user service trust, and potentially overloading low-end devices. Therefore, this study proposes a drone mission automation system (DMAS) using EdgeCPS technology to provide the three aforementioned functions in an integrated manner. Real-world experiments were conducted to evaluate the proposed system, demonstrating that the DMAS components operate according to the specified roles in the delivery scenario. In addition, the system achieved user verification with a similarity of more than 90% in the process of receiving the product, and verified a faster inference speed and a lower resource share than the existing method.
CPS환경에서 산불 정찰을 위한 무인기 비행경로 생성 도구
정지원,배창희,최으뜸,이성진,Ji-Won Jeong,Chang-Hui Bae,EuTeum Choi,SeongJin Lee 대한임베디드공학회 2023 대한임베디드공학회논문지 Vol.18 No.6
Existing studies on the UAV (Unmanned Aerial Vehicle)-based CPS (Cyber Physical System) environment lack forest fire monitoring and forest fire reconnaissance using real-world UAVs. So, it is necessary to monitor forest fires early through CPS based on real-world UAVs with high reliability and resource management efficiency. In this paper presents an MFG (Misstion File Generater) that automatically generates a flight path of an UAV for forest fire monitoring in a CPS environment. MFG generates flight paths based on a hiking trail with a high fire probability due to a true story of an entrant. We have confirmed that the flight path generated by MFG can be applied to the UAV. Also, we have verified that the UAV flies according to the flight path generated by MFG in simulation, with a negligible error rate.
오배자, 우슬, 가자 및 감초를 포함하는 혼합추출물의 항산화 및 항균 활성
조홍석(Hong-Suk Cho),강세원(Se-won kang),김주희(Ju-Hee Kim),최민주(Min-Joo Choi),유혜원(Hye-Won Yu),박으뜸(Euteum Park),전홍성(Hong Sung Chun) 한국생물공학회 2014 KSBB Journal Vol.29 No.1
In this study, antioxidant and antimicrobial activities of ethanolic crude extract and its five different solvent subfractions (namely, ethyl acetate fraction, n-butanol fraction, chloroform fraction, n-hexane fraction and the aqueous fraction) from a mixture of four different medicinal herbs (Galla rhois, Achyranthes japonica Nakai, Terminalia chebula Retz and Glycyrrhiza uralensis) were investigated. Among all the tested mixture combination of four medicinal herbs, 5:3:1:1 ratio of Galla:Achyranthes : Terminalia : Glycyrrhiza had the best antimicrobial effects against four strains of microorganisms (Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa and Escherichia coli) and exhibited the highest DPPH radical-scavenging activity. Further sub-fractions with solvents were screened for antioxidant and antimicrobial activities. Antioxidant activity in order was ethyl acetate fraction > n-butanol fraction > chloroform fraction > nhexane fraction > aqueous fraction. The n-butanol extracted fraction showed the highest level of antimicrobial activity in com- parison to other fractions. In addition, all those fractions did not show any cytotoxicity against human skin cell CCD-986sk. These results suggest that 5:3:1:1 combination extracts of medicinal herbs (Galla : Achyranthes : Terminalia : Glycyrrhiza) may be potentially used as a safe natural antimicrobial preservative.