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Mori,S.,Ryu,Jae-Young 群山大學校自然科學硏究所 1989 自然科學硏究 Vol.4 No.-
松代 地下 觀測所의 資料(地下 220 MWE 깊이)에서 얻은 에너지 ??의 宇宙線 粒子의 强度를 滿五年間 1984∼1989의 測定資料를 STANFORD의 行星間 磁揚의 極性(T-A)을 參考로하여 恒星時日變化에 따라 分類하였다. 極性에 따라 T-A 벡터를 作成하니 5個의 方向 成分에 대하여 振幅 0.02% 位相은 21 地方時의 依存度가 있음이 確認되었다. 에너지 ?? 粒子에 대하여는 Swinson(1969)효과가 公認된 바 있는데 Swinson 효과가 더 높은 에너지 영역에도 適用되는지 多角度로 究明中이나 아직 확실한 結論에 到達하지는 않았다.
Ferroelectric Domains in Hexagonal YMnO3
S Mori,T Katsufuji,Y Horibe 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
In order to clarify the microstructure related to the ferroelectric properties in multi-ferroic YMnO3, we carefully examined the ferroelectric-domain conguration by transmission electron microscopy (TEM). It was found that ferroelectric domains in YMnO3 consist of six anti-phase domains at room temperature. On warming from room temperature, the ferroelectric-domain con-guration changes into one consisting of three anti-phase domains around 738 K. In addition, the ferroelectric domains in YMnO3 change drastically into microdomains with a size of 10 20 nmby substitution of Ti ions for some of the Mn ones.
S.Kagoshima,M.Higa,R.Kondo,H.Hoshino,T.Mori,H.Mori 한국물리학회 2004 Current Applied Physics Vol.4 No.5
Using the uniaxial strain method, the lattice parameters and the atomic positions of the quasi-two-dimensional organic con-ductor θ-(BEDT-TTF)2CsZn(SCN)4 were measured at room temperature with piston pressures up to 10 kbar applied parallel to thec-axis in the conducting plane. The lattice parameterc was predominantlyreduced with increasing the piston pressure although asmall Poisson’s eect occurred in the parametera. Band calculation showed that the transfer integrals under the uniaxial com-pression bythe piston pressure of 10 kbar became similar to those ofh-(BEDT-TTF)2 RbZn(SCN)4. This result is consistent withthat of transport measurements reported alreadyand suggests that a charge disproportionation, which has been observed in theRbZn-compound, occurs also in the present compound under the uniaxial compressive strain.
Electronic state of MgB2 superconductor
S.Tajima,T.Masui,H.Uchiyama,J.W.Quilty,Yu.Eltsev,S.Lee,A.Yamamoto,H.Mori 한국물리학회 2002 Current Applied Physics Vol.2 No.4
Thanks to the high quality single crystals of MgB2, we have measured various physical properties to extract important features ofthe electronic state in this superconductor. The electron density maps calculated from a precise X-ray diraction analysis and theband dispersions determined by the angle-resolved photoemission spectroscopy demonstrate that the boron orbitals play a centraldicated in resistivity and Raman scattering spectra. Although the multi-band structure signicantly aects various normal stateproperties, no clear multi-gap feature can be observed in the Raman scattering spectra belowTc.. 2002 Elsevier Science B.V. All rights reserved.
일반 및 무중력에서 부상 화염의 진동 특성에 관한 연구
원상희(S. H. Won),김준홍(J. Kim),신무경(M. K. Shin),정석호(S. H. Chung),O. Fujita,T. Mori,J. H. Choi,K. Ito 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
Characteristics of oscillating lifted flames in coflow have been investigated experimentally with highly<br/> diluted propane in normal and micro gravities to elucidate the stabilization mechanism. In normal gravity,<br/> oscillating lifted flames with the frequency of 2-5 Hz were observed in a certain range of fuel mole fraction<br/> and jet velocity. The oscillation frequency correlated well with jet velocity in terms of Strouhal number,<br/> defined with the stoichiometric laminar burning velocity. This demonstrated the importance of the<br/> propagation characteristics of tribrachial flames at the base of lifted flames in the flame oscillation.<br/> Microgravity experiments have been conducted after the oscillating lifted flames are stabilized in normal<br/> gravity. During the change in gravitational acceleration, the flames rapidly stabilized as nozzle attached<br/> flame mode and became stationary. This behavior confirmed that the lifted flame oscillation in normal<br/> gravity is due to the buoyancy driven instability. Numerical simulation has also been performed<br/> accounting the change in gravitational acceleration. The results successfully predicted the transition<br/> behavior from oscillating lifted flame in normal gravity to stationary attached flame in microgravity and the<br/> variation of flame shapes during the transition.
Lightcurve survey of V-type asteroids in the inner asteroid belt
Hasegawa, S.,Miyasaka, S.,Mito, H.,Sarugaku, Y.,Ozawa, T.,Kuroda, D.,Nishihara, S.,Harada, A.,Yoshida, M.,Yanagisawa, K.,Shimizu, Y.,Nagayama, S.,Toda, H.,Okita, K.,Kawai, N.,Mori, M.,Sekiguchi, T.,Is Astronomical Society of Japan 2014 Publications of the Astronomical Society of Japan Vol.66 No.3
Structural control of organic conductors by uniaxial strain: θ- and α-phases of BEDT-TTF compounds
R. Kondo,S. Kagoshima,M. Chusho,H. Hoshino,T. Mori,H. Mori,S. Tanaka 한국물리학회 2002 Current Applied Physics Vol.2 No.6
The crystalline and electronic structures of thea-phase BEDT-TTF organic superconductors were controlled by the uniaxiala-axiswhile thec-axis compression reduced the bandwidth. Similar controls were possible also in theh-phase compounds. Thea-axiscompression made the material metallic although thec-axis one insulating. It is possible to systematically explain these changes inelectronic properties under the uniaxial compression in terms of the changes in the electronic band structure in the conducting layer.. 2002 Elsevier Science B.V. All rights reserved.
Characterization of an Intense Laser-Produced Preformed Plasma for Proton Generation
A Sagisaka,A. Noda,A. Fukumi,A. Yogo,A. S. Pirozhkov,H. Daido,K. Nemoto,K. Ogura,M. Nishiuchi,M. Mori,M. Kado,S. Orimo,S. Nakamura,T. Nayuki,T. Shirai,T. Fujii,Y. Oishi,Y. Hayashi,Y. Iwashita,Z. Li 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.I
High-energy protons are generated with a 3-μm-thick tantalum target irradiated with a highintensity laser under the preformed plasma condition. We observe the electron density distributions of preformed plasmas with two-color probe beams as interferometers. The preformed plasma at the front side of the target is generated by pre-pulses of a high-intensity Ti:sapphire laser. In this preformed plasma condition, the maximum proton enegy is 900 keV. The half angle of the generated proton beam (>500 keV) is about 10.