Nematic transition and highly two-dimensional superconductivity in BaTi2_2Bi2_2O revealed by 209^{209}Bi-nuclear magnetic resonance/nuclear quadrupole resonance measurements

In this Rapid Communication, a set of $^{209}$Bi-nuclear magnetic resonance (NMR)/nuclear quadrupole resonance (NQR) measurements has been performed to investigate the physical properties of superconducting (SC) BaTi$_2$Bi$_2$O from a microscopic point of view. The NMR and NQR spectra at 5~K can be reproduced with a non-zero in-plane anisotropic parameter $\eta$, indicating the breaking of the in-plane four-fold symmetry at the Bi site without any magnetic order, i.e., `the electronic nematic state'. In the SC state, the nuclear spin-lattice relaxation rate divided by temperature, $1/T_1T$, does not change even below $T_{\rm c}$, while a clear SC transition was observed with a diamagnetic signal. This observation can be attributed to the strong two-dimensionality in BaTi$_2$Bi$_2$O. Comparing the NMR/NQR results among BaTi$_2$$Pn$$_2$O ($Pn$ = As, Sb, and Bi), it was found that the normal and SC properties of BaTi$_2$Bi$_2$O were considerably different from those of BaTi$_2$Sb$_2$O and BaTi$_2$As$_2$O, which might explain the two-dome structure of $T_{\rm c}$ in this system.Comment: 5 pages, 6 figure

Examination of the Robustness of the Resilience Scale Using Multigroup Analysis

This study aimed to investigate the factor invariance and robustness of a resilience scale using multigroup analysis to allow for a relative comparison of models. Participants were 2568 high school students (male: 1211, female: 1357) in Japan. They answered the questionnaire about their respective general attributes (gender, grade) and the resilience scale. The resilience scale included 9 items and 3 factors (building relationship, overcome power, and breakthrough strength). To investigate whether the resilience scale responds appropriately to the participants in this study, a separate confirmatory factor analysis was conducted for each gender. After examining the construct validity of the resilience scale, a multigroup analysis was conducted for groups by gender. The multigroup analysis confirmed configural invariance, measurement invariance, weak factorial invariance, and strong factorial invariance. The results of the confirmatory factor analysis for each gender was a good fit. Configural invariance was adopted for multigroup analysis. The validity of interpreting resilience in male and female participants using the same model was established in this study. We expect that the current findings will help interpret gender differences in resilience in the field of mental health

Smad1または5により誘導されるSmadの抑制因子,Smad6について

取得学位：博士(医学)，学位授与番号：医博甲第1456号，学位授与年月日：平成13年3月22日,学位授与年：200