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변형경화형 시멘트 복합체와 콘크리트 합성 슬래브의 균열제어 성능
윤현도 ( Yun Hyun-do ),로쿠고 ( Rokugo R. ),임승찬 ( Lim Sung-chan ),박완신 ( Park Wan-shin ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
This paper describes the crack-damage mitigation performances of RC( Reinforced Concrete) slabs layered with SHCC(Strain-Hardening Cementitious Composites). Three RC slabs with 1,800mm length, 400mm width and 180mm thickness were made and loaded monotonically to failure. Test variable is SHCC layer thickness(20 and 40mm). For the purpose of this study, a 1.5 percent (by volume) polyethylene (PE) fiber reinforced cement was selected as the material for the SHCC layer. The test results indicated that SHCC as a replacement for concrete that surrounds the main reinforcement in RC slabs would be possible to limit crack widths and enhance flexural performance.
2.4GHz대역 ZigBee 송수신기를 사용한 과학화 전투훈련 시스템에서 최소송신전력과 간섭에 관한 연구
곽현상,유호준,김영호,전상현,김종헌,이찬주,임승찬,Kwak, Hyun-Sang,Yoo, Ho-Joon,Kim, Young-Ho,Chun, Sang-Hyun,Kim, Jong-Heon,Lee, Chan-Joo,Lim, Seung-Chan 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.6
In this paper, interference analysis has been performed between RF receiver and transmitters on each soldier for Multiple Integrated Laser Engagement System(MILES) which are following ZigBee standard. In order to obtain minimum transmit power without interference, 1% Packet Error Rates(PER) from 14 transmitters attached on a soldier to a receiver are measured with the scenarios for simple transmitting and receiving network configuration and for repeating network configuration. Based on this transmit power, the available distance for interference free among soldiers is simulated using Spectrum Engineering Advanced Monte Carlo Analysis Tool(SEAMCAT). Later scenario gives the benefit of 10dB lower transmit power, smaller and lighter power source, and better activity of trainee.
변형경화형 시멘트 복합체와 콘크리트 합성 슬래브의 균열제어 성능
윤현도(Yun, Hyun-Do),로쿠고(Rokugo, R.),임승찬(Lim, Sung-Chan),박완신(Park, Wan-Shin) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.1
This paper describes the crack-damage mitigation performances of RC(Reinforced Concrete) slabs layered with SHCC(Strain-Hardening Cementitious Composites). Three RC slabs with 1,800mm length, 400mm width and 180mm thickness were made and loaded monotonically to failure. Test variable is SHCC layer thickness(20 and 40mm). For the purpose of this study, a 1.5 percent(by volume) polyethylene(PE) fiber reinforced cement was selected as the material for the SHCC layer. The test results indicated that SHCC as a replacement for concrete that surrounds the main reinforcement in RC slabs would be possible to limit crack widths and enhance flexural performance.