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현황과 전망 - 무인헬기의 농업이용 현황과 효과 - '방재효과.생력화.정부의지' 커 농가도입 급증 전망
김영광,Kim, Yeong-Gwang 한국작물보호협회 2009 자연과 농업 Vol.248 No.-
2003년 일본으로부터 도입, 작년 말까지 45대의 무인헬기가 운영 중이다. 확대 도입에 앞서 충분한 방제면적 확보와 기타 활용성을 꼼꼼히 따져 경제적으로 운영되어야 하며 적당량의 농약이 균일 살포되는 자동조정시스템 개발과 전용 약제 및 제형개발, 표준 방제매뉴얼이 하루 빨리 정립되어야 할 것이다.
염증성 장 질환 동물 모델에서 황금탕과 감초사심탕의 효능 연구
김영광,문영호,Kim, Young-kwang,Moon, Young-ho 대한한방내과학회 2021 大韓韓方內科學會誌 Vol.42 No.3
Objectives: This study investigates the mechanism of Hwanggeum-tang (HGT) and Gamchosasim-tang (GST) on inflammatory bowel disease (IBD). Methods: The mice (C57BL/6N) were treated with distilled water and 3% dextran sulfate sodium (DSS) to experimentally induce ulcerative colitis. The mice were divided into 7 groups of (6 mice: normal, negative control, positive control (with sulfasalazine), 4 experimental groups (with HGT and GST, respectively). RAW 264.7 cells were used for cell experiments. The experiment was conducted in two ways: in vitro and in vivo. Results: In the experimental group (HGT, GST) of in vitro experiments, NO production decreased, and significant changes in gene expression and protein activation were observed. The length of the colon recovered in the experimental groups (HGT, GST) of the in vivo experiment was longer than that of the negative control group, and the mucosal barrier was recovered. Sone significant changes in the amount of mRNA expression were partially observed, and significant changes in protein activation also were confirmed. Conclusions: HGT and GST are effective in treating IBD caused by DSS. In the same herbal preparation group, the higher the concentration, the better the experimental effect, and when the same concentration was tested, HGT was more effective than GST. Herbal medicine has a higher antioxidant effect than sulfasalazine, so it is also excellent for cell protection.
김영광,박상영,박찬덕,Kim, Youngkwang,Park, Sang-Young,Park, Chandoek 한국천문학회 2012 天文學會報 Vol.37 No.2
We present an alternative approach for satellite formation reconfiguration by an optimal impulsive-thrust strategy to minimize the total characteristic velocity in a near-circular-orbit. Linear transformation decouples the Hill-Clohessy-Wiltshire(HCW) dynamics into a new block-diagonal system matrix consisting of 1-dimensional harmonic oscillator and 2-dimensional subsystem. In contrast to a solution based on the conventional primer vector theory, the optimal solution and the necessary conditions are represented as times and directions of impulses. New analytical expression of the total characteristic velocity is found for each sub systems under general boundary conditions including transfer time constraint. To minimize the total characteristic velocity, necessary conditions for times and directions of impulses are analytically solved. While the solution to the 1-dimensional harmonic oscillator has been found, the solution to the 2-dimensional subsystem is currently under construction. Our approach is expected to be applicable to more challenging problems.
김영광(Yeonggwang Kim),이지훈(Jihoon Lee),윤준철(Junchul Yoon),김영관(Youngkwan Kim),김진술(Jinsul Kim) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
전력 수요 예측 분야에서는 전력 부하 모니터링 및 수요 예측과 같은 연구를 수행하기 위해 인공지능을 주로 사용한다. 하지만, 단일 컴퓨터로 학습 시 막대한 양의 자원 소모로 과부하가 발생하게 된다. 이러한 문제점을 해결하기 위해 최근에는 분산 컴퓨팅을 기반으로 한 클라우드 형태의 컴퓨팅 자원을 활용하여 연구를 수행하였다. 하지만 메인 서버로부터 거리가 먼 지역과의 정확하고 빠른 데이터 전송을 위해서는 새로운 기술이 필요하다. 그래서 우리는 본 문제를 해결하기 위해 에지 컴퓨팅을 활용하여 전력 수요 예측을 하기 위한 에지 컴퓨팅을 소개하였으며, 에지 컴퓨팅을 적용 시 응답 처리속도를 비교하였다. 그리고 제안하는 에지 컴퓨팅에서 머신러닝 학습을 수행하여 전력 수요 예측 성능을 측정하였다.
한국 성인의 3차 흡연으로 인한 아이의 건강 유해성 인식과 관련 요인
김정훈(Jeonghoon Kim),윤진하(Jin-Ha Yoon),김지현(Jihyun Kim),이완형(Wanhyung Lee),김영광(Yeong-Kwang Kim),이승현(Seunghyun Lee),김규상(KyooSang Kim) 한국환경보건학회 2018 한국환경보건학회지 Vol.44 No.1
Objectives: Thirdhand smoke (THS) refers to residual tobacco smoke pollutants that remain after cigarette smoking. The purpose of this study was to determine predictors of the belief among adults in Korea that THS is harmful to children. Methods: A population-based sample of 3,000 adults (≥19 years) among a web-based panel in Korea was obtained in November 2016. The respondents filled out questionnaires, including THS beliefs, smoking status, presence of voluntary smoke-free rules at home, and support for the implementation of smoke-free regulations at home. THS beliefs were assessed with a statement that staying in a room today where people smoked yesterday can harm the health of children. Results: Overall, 92.2 % of adults believed that THS exposure could harm the health of children. Respondents who were nonsmokers, believed that SHS exposure were associated with pneumonia of children, lived in home with complete smoke-free rule at home, and supported the implementation of smoke-free regulation at home were more likely to believe that THS could harm for health of children. Conclusions: The majority of Korean adults believed that THS exposure could harm the health of children. Predictors identified in the study can be useful to address the risk of THS beliefs and promote implementation of tobacco control policies.