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이주열,김근영,이승환,Lee, J.,Kim, K.,Lee, S.H. 한국전자통신연구원 2012 전자통신동향분석 Vol.27 No.2
스마트폰의 대중화와 더불어 모바일 데이터 트래픽은 폭발적인 증가 추세에 있다. 이와 같은 트래픽 요구에 부합하도록 시스템 측면에서 주파수 사용 효율을 높이는 다양한 많은 기술들이 제안되고 있다. 또 한편에서는 사용자들 측면에서 사용자의 채널 환경에 변함 없이 일정한 체감 품질을 유지하는 기술에 대한 제안도 되고 있다. 본고에서는 최근 주목받고 있는 셀 간 간섭으로 저하되는 무선 이동통신의 품질을 다중 셀 간의 협력을 통해 해결하는 MCP (multi-cell processing)에 대한 전반적인 연구동향 등을 소개한다. MCP를 위한 방법들에 대한 고찰과 이론적 모델 및 이를 위한 기술적 과제 등에 대한 논의도 소개한다.
J. B. Kim,이영백,윤종승,G. J. Lee,이주열,김기원 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.6
The magnetic and the magneto-optical properties of one-dimensional magnetic photonic crystals(1-D MPCs) produced by using femtosecond-laser-induced crystallization of amorphous Co2MnSi .lms were elucidated. The amorphous Co2MnSi .lms were fabricated on glass substrate at room temperature by using rf magnetron sputtering. A grating-like periodic structure was obtained by using two-beam interference of the laser pulses. The atomic-force-microscopy and the transmission-electron-microscopy results showed regularly-spaced alternating lines with a periodicity of 2 ¹m. Magnetic-force-microscopy revealed periodic patterns of magnetic domains in the grating. The Kerr hysteresis loops of the sample were measured via the longitudinal magneto-optical Kerr eect by using a magneto-optical microscope. The enhanced magneto-optical properties of .lms were observed in the .rst-order diraction beam. The .lms with a spatially periodic magnetic structure were found to be relatively easily fabricated by selectively crystallizing a paramagnetic Co2MnSi amorphous .lm, which crystallized into a ferromagnetic phase upon illuminating it with a su±ciently intense laser light.
Nina Lee,이영백,B. J. Kim,이주열,M. D. Huang,Y. V. Kudryavtsev 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.1
Some physical properties of bulk Heusler alloys, Ni2MnM (M = Al, Ga and In), and their thin lms were studied. Structural characterization was performed by using X-ray diraction. The optical conductivity spectra of the bulk samples exhibit a two-peak structure in the 0.5 - 4.5 eV energy range. The evolution of the high-energy peak can be explained by the variation of the lattice constant. A SQUID magnetometer was employed to measure the temperature dependence of the magnetic properties in the 5 - 395 K temperature range. The disordered phase of the Ni2MnGa and Ni2MnIn alloy lms behaves like Pauli paramagnets. Annealing of the disordered lms restores the ordered structure, with almost full recovery of the magnetic and transport properties of the ordered lms.
수도등숙 향상을 위한 생리생태연구 제2보 ABA 및 BA처리가 수도등숙에 미치는 영향에 대하여
서관석,이주열,김소연,태전보부,Seo, G.S.,Lee, J.Y.,Kim, S.Y.,Ota,Yasuo 한국작물학회 1983 한국작물학회지 Vol.28 No.2
The experiment was carried out to know the ripeness effect of Gemgang when ABA and BA were sprayed at the heading stage. ABA promoted the stomatal movement, BA kept plant from senescence. Percent of filled grain, grain weight, photosynthesis, content of chlorophyll, transpiration and content of ATP were measured at 1-week interval from 2-weeks after heading.