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A Study on the Automatic Detection of Wild Animals that Cause a Great Damage to the Crops
Byungil Jeon,Semin Kim,Jeongwon Lee,Choong Ho Lee 한국정보통신학회 2019 2016 INTERNATIONAL CONFERENCE Vol.11 No.1
Korean farmers are suffering more than 10 billion won of crop damage every year due to wild animals. Especially, in the case of outdoor cultivation, the damage is serious. In order to reduce the damage of wild animals, various efforts have been made, such as setting scarecrows and water cannons, but the effect is negligible. In order to reduce the damage of crops, it is important to accurately analyze the causes of crop damage. In this study, we investigate the method of collecting information that can install the imaging device on the cultivated land and analyze the cause of damage. Identify wildlife through video information and identify the frequency of occurrence by day or month. Video information is captured using a video tracking algorithm such as OpenCV (Open Source Computer Vision Library) Detect wildlife automatically. We analyze behavior patterns of wild animals detected in farmland and study how to deal with them.
안병일(Byungil Ahn),전도영(Doyoung Jeon) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
A controllable bus driver’s seat was developed using an MR fluid damper. A four bar linkage mechanism<br/> with the damper and spring replaced the fixed structure between the seat cushion and floor. The contrinuous<br/> skyhook algorithm changes the damping force of the damper according to sensor inputs. Experiments show<br/> that a person feels less vibration with the continuous skyhook algorithm compared to the skyhook algorithm<br/> and the fixed damper.
정지궤도위성용 한국형 우주발사체를 위한 고성능 상단 엔진 개념 설계
유병일(Byungil Yu),이광진(Kwang-Jin Lee),우성필(Seongphil Woo),임지혁(Ji-Hyuk Im),소윤석(Younseok So),전준수(Junsu Jeon),이정호(Jungho Lee),서대반(Daeban Seo),한영민(Yeoungmin Han),김진한(Jinhan Kim) 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.12
항공우주연구원에서는 정지궤도용 우주발사체에 적용 가능한 고성능 상단 엔진에 대한 선행기술 개발이 진행 중에 있다. 한국형발사체(KSLV)는 GG를 이용한 개방형 사이클 엔진이며 저궤도 위성 발사를 위한 발사체로 향후 정지궤도위성 발사체를 위해서는 이보다 높은 비추력을 가진 고효율의 상단엔진의 필요하게 된다. 이러한 요구조건을 충족시키기 위해 다단 연소방식의 엔진이 필요하며, 본 논문에서는 당 연구원이 진행 중인 다단 연소 사이클 엔진 개념 설계 진행 현황과 향후 계획을 기술하였다. Technology development of the high performance upper stage engine for a GEO KSLV is undergoing in Korea Aerospace Research Institute. KSLV is composed of open cycle engine by GG, that is for the low orbit launch vehicle. But for the future GEO launch vehicle, the high performance upper stage engine which has high specific impulse is required. The staged combustion cycle engine is necessary for this mission. In this paper, current progress and future plan for staged combustion cycle engine development is described.
전준수(Junsu Jeon),이정호(Jungho Lee),우성필(Seongphil Woo),임지혁(Ji-Hyuk Im),이광진(Kwang-Jin Lee),유병일(Byungil Yoo),조남경(Nam-Kyung Cho),한영민(Yeoung-Min Han) 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.12
개발 중에 있는 9톤급 다단연소방식 엔진은 크게 예연소기, 터보펌프, 연소기로 구성되어 있다. 이 중 예연소기와 연소기는 시험을 위한 점화원을 필요로 하며, 점화제로는 TEA/B 혼합액을 사용하고 있다. 점화제를 안정적으로 공급하기 위하여 점화제 용기인 TEA amplue을 설계 및 제작하였다. 제작된 TEA ampule은 강도/기밀 시험을 통하여 안정성을 확보하였으며, 향후 예연소기 및 연소기의 점화에 사용될 예정이다. A staged combustion cycle engine consists of the pre-burner, the turbo-pump and the combustion chamber. The pre-burner and the combustion chamber are needed an ignition source for a test. An ignition agent is used the TEA/B mixture liquid. A TEA ampule was designed and manufactured for stable supplying of an ignition agent. The stability of manufactured TEA ampule was confirmed by strength and leakage test. And it will be used for an ignition of the pre-burner and the combustion test.
Jeongwon Lee,Byungil Jeon,Semin Kim,Gyujeon Lee,Choong Ho Lee 한국정보통신학회 2019 2016 INTERNATIONAL CONFERENCE Vol.11 No.1
Emphasizing the government"s efforts to strengthen social responsibility and support for daycare center and daycare center for the growing number of working women, and to relieve the stress on the daycare center of working women as a result of the publicity of daycare center policies and the localization of daycare center have. In this study, the current status of daycare centers and childcare services using public data centered on Seoul and Incheon is investigated and the factors of type of daycare center that affect the filling rate are derived using bigdata technology.
전준수(Junsu Jeon),왕승원(Seungwon Wang),정용갑(Yonggahp Chung),유병일(Byungil Yoo),이광진(Kwangjin Lee),한영민(Yeoungmin Han) 한국추진공학회 2015 한국추진공학회 학술대회논문집 Vol.2015 No.5
현재 개발 중에 있는 한국형 발사체(KSLV-II)의 엔진 하부 시스템인 연소기의 성능 평가를 위한 연소기 연소 시험 설비(Combustion Chamber Test Facility ; CCTF)가 전남 고흥에 위치한 나로 우주센터에 구축되었다. 연소 시험을 위한 추진제는 산화제로 액체산소(Lox), 연료로 케로신(Kerosene)이 각각 사용되며 질소 가압 방식으로 연소기에 공급된다. 본 논문에서는 구축된 연소기 연소시험설비의 연료 공급 시스템을 소개하였다. A rocket combustor is one of the engine sub-system of KSLV-II(currently under development by KARI). Combustion Chamber Test Facility(CCTF) for performance evaluation of combustor has been constructed in Naro Space Center. Propellants for a combustion test are using the liquid oxygen as an oxidizer and the kerosene as a fuel. And the propellants are supplied to the combustion chamber by compressed nitrogen gas. This paper introduces the fuel supplying system of CCTF.