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이한주(HanJu Lee),장민규(MinGyu Jang),문진동(JinDong Moon),조윤호(YoonHo Cho) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
LKAS(Lane Keeping Assist System) detects front lane border by camera sensor which is specifically designed for line detection. LKAS system detects when a vehicle is about to depart from the existing lane, intimates the driver using acoustic and visual warning methodology and then calculates the reverse steering torque, as required to maintain the existing lane position, which is then applied by EPS(Electric Power Steering) without any driver intervention. This study suggests a Hardware-in-the-Loop Simulator, which can validate LKAS system. Simulator is based on real-time simulation methodology. Lane information from a real-time vehicle dynamics model is converted to 3 dimensional line formula in order for the LKAS MCU to receive decent line information through RS-232 protocol. A monitor display is prepared that makes LKAS take a vehicle model animation in real time, to validate lens, COMS & image processor. The developed simulator results are compared with real car results, which validate the usefulness of the simulator for LKAS development.
Effect of substrate on photo-induced persistent photoconductivity in InAs nanowires
Kim, Taeok,Park, Sungjin,Kang, Hang-Kyu,Jeong, Kwangsik,Bae, Jungmin,Song, Jindong,Cho, Mann-Ho Elsevier 2018 APPLIED SURFACE SCIENCE - Vol.458 No.-
<P><B>Abstract</B></P> <P>The thermal conduction by the difference in the substrate of InAs nanowires (NWs) was investigated by determining the local temperature using Raman spectroscopy as an optical method. The optoelectric characteristics of the supported and suspended InAs nanowires were also investigated. The change in the current with the laser power produced a characteristic profile depending on the InAs nanowire configuration. The persistent photoconductivity (PPC) effect in the InAs nanowires has not been previously studied in detail despite its importance for the material photoresponse. This report presents a study of the PPC effect and the underlying mechanism. The correlation between the PPC effect and the thermal conduction by the substrate-induced carrier redistribution in the InAs nanowires is highlighted. In addition, a unique PPC effect associated with a specific device structure is studied. Our results can enable novel functionalities for InAs-based optoelectric applications in the future.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The relative difference in the thermal conduction by the difference in the substrate of InAs nanowires was evaluated using Raman spectroscopy. </LI> <LI> The difference in thermal conduction affect the PPC characteristic of InAs nanowire device. </LI> </UL> </P>