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함정 전투체계 획득 프로세스 개선 연구 (전투체계 통합 중심으로)
황광룡,최봉완,김호중,Hwang, KwangYong,Choi, BongWan,Kim, HoJung 한국시스템엔지니어링학회 2016 시스템엔지니어링학술지 Vol.12 No.2
The threats around Korea Peninsula have been dramatically increased because North Korea is developing the Nuclear ballistic missile, Submarine launched ballistic missile(SLBM), and many kinds of weapons for sudden provocations. Therefore, ROK navy needs the cutting-edge warship combat systems in order to defeat the enemy threats effectively in the sea. The paper analyzes current warship combat system acquisition process and studies US navy and other advanced countries acquisition process and their contraction trends. After that, the paper proposes the optimal acquisition process of warship combat system for the ROK navy based on our current situation and other advanced countries acquisition trends. The paper will dedicate the next generation warship combat system acquisition process.
타이어 트래드 고무가 SNOW 및 제동 성능에 미치는 영향 연구
염기호(Kiho Yum),이철우(Chulwoo Lee),주광진(Kwangjin Joo),조현철(Hyunchul Cho),홍의석(Uiseok Hong),Wendll Collins,정진천(Jincheon Jung),김호중(Hojung Kim),장민영(Minyoung Jang),김용하(Yongha Kim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
In this research, the influence of tire tread compound on snow and braking performance was studied. First, the tire snow performance according to the viscoelastic properties of tire tread compound was investigated though the vehicle test. Secondly the influence of tire tread compound on braking performance was studied by controlling viscoelastic properties and ambient temperature. Finally the relationship between tire snow and braking performances was identified. It was founded that the glass transition temperature and loss modulus of tire tread compound are strongly related with snow performance. As glass transition temperature and loss modulus decrease, acceleration time and stopping distance on the road covered with compressed snow decreases. In addition, the tire with higher tan δ tread compound from 0℃ to 20℃ has shorter stopping distance characteristics on the dry road. Especially, higher stopping distance increase in terms of road surface temperature increase was found for the tire with higher decreasing rate in tan δ from 0℃ to 20℃. It was concluded that the tire with shorter acceleration time and stopping distance on the snow covered road has a longer stopping distance tendency on the dry road.