http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Raman Spectra of Proton Ordered XI phase Ice crystal
Kohji Abe,Kohji Nakano,Takao Miasa,Yuya Ohtake 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
Eects of an external electric feld on Raman spectra were studied in oxygen-isotope-substitutedSrTi18O3 (STO18). Signifcant frequency shifts and an increase of the intensities were observed above and below the ferroelectric transition temperature Tc = 23 K. Despite the clear difference in normal Raman spectra at low temperatures, the effect of an electric feld on the ferroelectric soft mode is similar to that for STO16, suggesting that in STO18 the soft mode remains very sensitive to the electric feld.
Effects of Electric Field on Raman Spectra in SrTi16O3 and SrTi18O3
Kohji Abe,Mitsuru Itoh,Osamu Sanaka,Ruiping Wang,Takashi Akaike,Takeshi Shigenari,Tomohiko Takemoto 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
Proton ordering phase transition of ice crystal was studied by Raman pectroscopy. The difference of the vibrational modes between Ih and XI phase were detected for the rst time in the translation region and in the libration region. Below Tc(= 72K), in the translation region a new intense peak was observed at 236 cm1 and the peak at 315 cm1 in Ih phase shifted to 325 cm1. In the libration region several new peaks were observed. Assignments of these modes are discussed from the polarization dependence.
Dielectric and Fluorescence Study on Phase Transitions in Liquid Crystal 5CB and 8CB
Kohji Abe,Atsushi Usami,Kenji Ishida,Takeshi Shigenalri,Yoshiharu Fukushima 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
Successive phase transitions, isotropic(I)-nematic(N)-crystal(C) of 5CB (pentyl cyanobiphenyl) and I-N-smectic(Sm)-C of 8CB (octyl cyanobiphenyl) were studied by dielectric measurement and time-resolved uorescence spectroscopy. Dielectric constants in 5CB and 8CB are very similar and show a considerable change at the I-N transition and an abrupt decrease at the crystallization point. In uorescence spectra, a broad and intense band from excimers (dimers in the excited state) and a weak band from monomers are observed at around at 405 nm and 350 nm, respectively. The temperature dependence of uorescence spectra and lifetime show a gradual change before the melting point as a precursor of the rst-order transition, while only little change was observed at the N-I transition
Stochastic Path Generation for Anticipative Road followingin Naturally Complex Scene
Kohji Kamejima 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
To expand the scope of humans’ perception for anticipative road following, a stochastic perception-control coupling is introduced on satellite-roadway-vehicle network. Based on the prediction of road way pattern in the satellite image, maneuverable are ais coded interms of a fractal attractor confined by boundary probability in the image of observed scene. Random shift of the boundary probability is detected via the perception process and interpolated by usings to chastic growth dynamics. Guided by the interpolation mechanism, the control process generates the trajectory to be followed by vehicle mechanism subjected to human’s unexpectable decision making. The validity of stochastic trajectory generation is verified via simulation studies.
Kohji Yamaki,Herath Mudiyanselage Theja Herath,Yuko Takano-Ishikawa 한국식품영양과학회 2003 Journal of medicinal food Vol.6 No.4
Certain naturally occurring flavonoids affect immunoregulatory activities in vitroand in vivoagainst cytokineproduction. Since tumor necrosis factor (TNF)-a is one of the major inflammatory cytokines, the effects of various dietaryflavonoids on TNF-a production in lipopolysaccharide (LPS)-stimulated J774.1 cells were evaluated in vitro. Flavones,flavonols, and chalcone are the most potent inhibitors of production of TNF-a. Flavanone, naringenin, anthocyanidin, pelargo-din, and cyanidin exhibit moderate inhibitory activity. In contrast, genistein isoflavone displays weak inhibition, while eri-odictyol flavanone is inactive. It is clear that the double bond between carbons 2 and 3 and the ketone group at position 4 offlavonoids are necessary for potent inhibitory effect. The difference in inhibitory action appears to depend on the categorizedsubclass of flavonoids.