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Phase Transitions and Collective Chain Dynamics in a Model Biomembrane C10H21NH3Cl
이철의,C. H. Lee,D. K. Oh,K. W. Lee 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
Proton nuclear magnetic resonance (NMR) was employed to investigate the nature of the phase transitions and collective chain dynamics in a model biomembrane C10H21NH3Cl undergoing an irreversible structural change. The phase transitions were manifest in the second moment and laboratory frame spin-lattice relaxation rate measurements, with a hysteresis upon heating and cooling. The dimensionality and its crossover were explicitly conrmed as well. In addition, the rotating frame spin-lattice relaxation measurements revealed a low-frequency critical collective chain dynamics in the kHz regime, which is associated with the interdigitated to noninterdigitated chain congurational phase transition.
이철화(Chul Hwa Lee) 한국사회체육학회 2001 한국사회체육학회지 Vol.16 No.-
The purpose of this study was to investigate perception of constraints and participation in sports of adolescents in during leisure time. The data analysis was based on information had gathered from 709 adolescents in Chung Cheong Province. The data were analyzed using ANOVA and canonical correlation with the SAS programs. First, for the sports involvement of adolescents, boy student was stronger than girl student, the rural student was stronger than the urban student, the satisfied student of the school life was stronger than non-satisfied student of the school life, the group of middle incomes was stronger than that of low and high incomes. For three dimensions of sports involvement, adolescents had involved in sports in the order of cognitive, behavioral, affective involvement.. Second, for the constraints of sports involvement, the degree of barriers in boy student was stronger than girl student, the students who lived in middle city than the largest and countryside had more barriers, who satisfied in the school life than non-satisfied had more barriers, who lived in middle incomes than low and high had more barriers. For five dimensions of sports constraints, adolescents had barriers in the order of facilities, services and partners, economic, lack of knowledge. Third, for adolescents sports involvement, the cognitive and behavioral involvement in sports related sports participation constraints. For adolescents sports participation constraints, the barriers of individual and psychological, lack of knowledge, time related sports involvement.