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이돈근,장동리,강영수 한국자기공명학회 2002 Journal of the Korean Magnetic Resonance Society Vol.6 No.2
The photoproduced cation radical of N-methylphenothiazine (PC1) doped into phenyltriethoxysilane (PhiTEOS), vinyltriethoxysilane (VTEOS) and methyltriethoxysilane (METOS) was studied with electron spin resonance (ESR) and electron nuclear double resonance (ENDOR). The photoinduced charge separation efficiency was determined by integration of ESR spectra which correspond to the amount of photoproduced cation radical in the matrices. This was correlatively studied with the polarity and pore size of the gel matrices. The relative polarity of the matrices was determined by measuring max values of PC1 in the different matrices. The relative pore size among the matrices was determined by measuring relative proton matrix ENDOR line widths of the photoproduced cation radical of PC1. The decay kinetic constants of the cation radical of PC1 in the different matrices was relatively studied with fitting the biexponential decay curves after exposure at the ambient condition. This is correlatively interpreted with the polarity and pore size of the matrices 영어논문
이돈근,강영수 한국전자통신연구원 2004 ETRI Journal Vol.26 No.3
We formed silver nanocrystallites by the thermal decomposition of a Ag+1-oleate complex, which was prepared by a reaction with AgNO3 and sodium oleate in a water solution. The resulting monodispersed silver nanocrystallites were produced by controlling the temperature (290 °C). Transmission electron microscopic (TEM) images of the particles showed a 2-dimensional assembly of the particles with a diameter of 9.5 ± 0.7 nm, demonstrating the uniformity of these nanocrystallites. An energy-dispersive X-ray (EDX) spectrum and X-ray diffraction (XRD) peaks of the nanocrystallites showed the highly crystalline nature of the silver structure. We analyzed the decomposition of the Ag+1-oleate complex using a Thermo Gravimetric Analyzer (TGA) and observed the crystallization process using XRD.
김진수,이돈근,강영수 한국자기공명학회 2005 Journal of the Korean Magnetic Resonance Society Vol.9 No.2
The interaction of poly(ethylene glycol)(PEG) with cationic dodecyl trimethyl ammonium bromide (DTAB)micelle was studied with electron spin resonance (ESR) by determining line widths of the ESR spectra and coupling constant of nitrogen(AN). The degree of ESR line shape change such as line widths and coupling constant indicated that PEG mixes well with DTAB micelle due to a great hydrophobic interaction with surfactant alkyl chains. This suggests that the PEG can be used as non-ionic surfactant to disperse the exposed oil in the ocean. 영어논문
Yocto Project 기반 ROS2 를 탑재한 청소로봇시스템 개발
김윤성(Yun-Sung Kim),이돈근(Don-geon Lee),정성훈(Seong-hoon Jeong),문형일(Hyeong-il Moon),유창승(Chang-seung Yu),이강영(Kang-young Lee),최준열(June-youl Choi) 제어로봇시스템학회 2021 제어·로봇·시스템학회 논문지 Vol.27 No.1
In this paper, an embedded system with ROS2(Robot Operating System) on Yocto Project has been proposed for the cleaning of robots. Yocto Project was adopted for portability and scalability in both software and hardware, and ROS2 was adopted and optimized for secure performance, security, and scalability. A Gazebo-based robot simulator modeled robots and 3D world, and the SLAM, Navigation, Path Planning, and Motion functions were implemented and verified. After modifying and optimizing the software packages implemented in the simulator, autonomous driving of the cleaning robot was verified. The possibility of commercialization was verified as well, through performance evaluation and improvement of the proposed cleaning robot system.