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복합고분자 PC/PBT 배합비 산출 및 기계적물성 분석기술
이금향(Keumhyang Lee),곽동환(Donghwan Kwak),윤성구(Sunggoo Yun),신민철(Minchul Shin),황덕형(Duckhyoung Hwang),안상두(Sangdoo Ahn) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Polymer blends and composites are widely used in automobile parts. In these compounds, the most important factor is the blend ratio. So, we have carried out the quantitative analysis for the PC/PBT blend using TGA and new analysis method of NMR spectroscopy. A further study, we also studied prediction model equations of mechanical properties of tensile, bending and impact strength from the compositional results. In conclusion, this advanced analytical technique will help us to develop new products and deal with field claims in automobile industry.
네트워크 RTK(FKP) 보정신호 안정성 및 모호정수 결정율 분석
김민호(Kim, Min-Ho),배태석(Bae, Tae-Suk),윤성구(Yun, Seong-Goo) 한국측량학회 2013 한국측량학회 학술대회자료집 Vol.2013 No.4
National Geographic Information Institute(NGII) has introduced FKPsystem from November 2012. However, network size of FKP system is bigger than that of VRS system. This means to depress the quality of the correction. Therefore, in this study, analysis of Network-RTK(FKP) correction signal stability and ambiguity fixing rate was performed. As a result, it can be seen that the stability of the correction signal and ambiguity fixing rate during daytime was worse than nighttime, which seems to be related with the ionospheric delay.