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군 전술망의 무선 이동 통신 체계의 통신 범위 중첩을 고려한 채널 할당 기법과 데이터 전달 기법
신현섭,채성윤,강경란,조영종,Shin, Hyun-Sup,Chae, Sung-Yoon,Kang, Kyung-Ran,Cho, Young-Jong 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.3
In this paper, we propose a channel allocation algorithm of MSAP(Mobile Subscriber Access Point) and data delivery scheme exploiting the symbol level network coding. The network is comprised of TS(Tactical Switch) as a backbone node, MSAPs, and TMFTs(Tactical Multi-Function Terminal). The TS performs the channel allocation considering the communication range overlapping between the neighboring MSAPs and applies the symbol level network coding, if necessary, depending on the position of the TMFTs. Assuming the number of available antennas of TMFT and MSAP will be extended to two from one, we propose two schemes: single mode and dual mode. Through the simulation, we show that the proposed delivery scheme provides higher delivery ratio and lower delivery delay compared with the legacy store-and-forward scheme.
나일론 및 셀룰로오스 섬유가 콘크리트의 역학적 특성에 미치는 영향
신현섭(Shin Hyun-Sup),박용규(Park Yong-Kyu),김광련(Kim Kwang-Ryeon),이건철(Lee Gun-Cheol),김병기(Kim Byung-Gi),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
This study investigated the influence of nylon(NY) and cellulose(CL) fiber on the fundamental and mechanical properties of concrete. Test showed that increase of NY and CL fiber contents proportionally decreased concrete fluidity. It is found that concrete containing more than proper amounts of fiber should be reconsidered. Although adding higher ratio of fiber caused slightly increased air content, all specimens were satisfied in aimed value. In addition, using both NY and CL fiber resulted in higher value of bleeding capacity, and retardation of setting time. For the properties of strength, both compressive and tensile strength was indicated at similar value to control concrete. However, it is clear that if those concrete containing fiber revised the value of increased air contents at fresh state, the strength value of that would be slightly increased. Flexural strength of concrete containing NY fiber was indicated at higher value than CL fiber. Concrete adding 0.6㎏/㎥ of fiber highly reduced plastic shrinkage crack area and showed the most favorabie impact resistance performance.
신현섭 ( Shin Hyun-sup ),김종백 ( Kim Jong-back ),김광련 ( Kim Kwang-ryeon ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
This study investigates engineering properties of concrete containing nylon(NY) and cellulose(CEL) fiber. Test showed that increase of fiber adding ratio decreased fluidity, especially for CEL fiber, and it slightly increased air content satisfying target range. As for the properties of hardened concrete, most specimens containing NY or CEL fiber exhibited similar performance to control concrete in the values of compressive, tensile and flexural strength. However, even if it revised the strength considering increase of air content, those specimens adding fibers would have slightly inclined the value, compared with that of control. In addition, as for the impact strength of specimens, the NY specimen showed higher than that of CEL, especially for adding 0.6kg/m<sup>3</sup> of NY fiber. Adding fiber did not affect length change ratio of specimens, while it showed even higher value than that of control, when added more than 0.9kg/m<sup>3</sup> of NY fiber.
신현섭(Shin Hyun-Sup),김종백(Kim Jong-Back),김광련(Kim Kwang-Ryeon),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.2
This study investigates engineering properties of concrete containing nylon(NY) and cellulose(CEL) fiber. Test showed that increase of fiber adding ratio decreased fluidity, especially for CEL fiber, and it slightly increased air content satisfying target range. As for the properties of hardened concrete, most specimens containing NY or CEL fiber exhibited similar performance to control concrete in the values of compressive, tensile and flexural strength. However, even if it revised the strength considering increase of air content, those specimens adding fibers would have slightly inclined the value, compared with that of control. In addition, as for the impact strength of specimens, the NY specimen showed higher than that of CEL, especially for adding 0.6㎏/㎥ of NY fiber. Adding fiber did not affect length change ratio of specimens, while it showed even higher value than that of control, when added more than 0.9㎏/㎥ of NY fiber.
나일론 및 셀룰로오스 섬유가 콘크리트의 역학적 특성에 미치는 영향
신현섭 ( Shin Hyun-sup ),박용규 ( Park Yong-kyu ),김광련 ( Kim Kwang-ryeon ),이건철 ( Lee Gun-cheol ),김병기 ( Kim Byung-gi ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
This study investigated the influence of nylon(NY) and cellulose(CL) fiber on the fundamental and mechanical properties of concrete. Test showed that increase of NY and CL fiber contents proportionally decreased concrete fluidity. It is found that concrete containing more than proper amounts of fiber should be reconsidered. Although adding higher ratio of fiber caused slightly increased air content, all specimens were satisfied in aimed value. In addition, using both NY and CL fiber resulted in higher value of bleeding capacity, and retardation of setting time. For the properties of strength, both compressive and tensile strength was indicated at similar value to control concrete. However, it is clear that if those concrete containing fiber revised the value of increased air contents at fresh state, the strength value of that would be slightly increased. Flexural strength of concrete containing NY fiber was indicated at higher value than CL fiber. Concrete adding 0.6kg/m3 of fiber highly reduced plastic shrinkage crack area and showed the most favorable impact resistance performance.