http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Triangular Spin Tubes with Bond Randomness
Yoko Miura,Hirotaka Manaka 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
We performed X-ray diffraction, magnetic susceptibility, and magnetization experiments on nonequilateraltriangular spin tubes composed of α-KCr1−xFexF4 (x = 00.13), which consisted ofone-dimensional Heisenberg antiferromagnets coexisting with geometrically-frustrated spin systemswith bond randomness. The variation of lattice parameters with x may indicate that the Fe3+ions constitute the low-spin state (S = 1/2). As a result of analyses of the frustration factor andthe spin-flop transition field, we found that the effect of geometrical spin frustration was enhancedand that the magnetic anisotropy was weakened as x was increased. Because these results areremarkably similar to the previous results for α-KCr1−xAlxF4, the effect of the chemical impuritysubstitutions, whether they are magnetic or nonmagnetic ions, on α-KCrF4 is clearly understood.
Yoko Kato,Kuriko Kagitani-Shimono,Junko Matsuzaki,Ryuzo Hanaie,Tomoka Yamamoto,Koji Tominaga,Yoshiyuki Watanabe,Ikuko Mohri,Masako Taniike 대한신경정신의학회 2019 PSYCHIATRY INVESTIGATION Vol.16 No.3
Objective: The purpose of the present study was to clarify the relationship between white matter tracts and cognitive symptoms in children with high-functioning autism spectrum disorder (ASD). Methods: We examined the cognitive functions of 17 children with high-functioning ASD and 18 typically developing (TD) controls and performed diffusion tensor imaging (DTI) tractography. We compared the results between the groups and investigated the correlations between the cognitive scores and DTI parameters within each group. Results: The Comprehension scores in the ASD group exhibited a positive correlation with mean diffusivity (MD) in the forceps minor (F minor). In the TD group, the Comprehension scores were positively correlated with fractional anisotropy (FA) in the right inferior fronto-occipital fasciculus (IFO) and left anterior thalamic radiation (ATR), and negatively correlated with MD in the left ATR, radial diffusivity (RD) in the right IFO, and RD in the left ATR. Additionally, a positive correlation was observed between the Matching Numbers scores and MD in the left uncinate fasciculus and F minor, and RD in the F minor. Furthermore, the Sentence Questions scores exhibited a positive correlation with RD in the right inferior longitudinal fasciculus. Relative to TD controls, the specific tract showing a strong correlation with the cognitive scores was reduced in the ASD group. Conclusion: Our findings indicate that white matter tracts connecting specific brain areas may exhibit a weaker relationship with cognitive functions in children with ASD, resulting in less efficient cognitive pathways than those observed in TD children.