【目的】災害医療対応シミュレーション・システムを用いて，首都直下地震発災後の人的被害や医療資源を想定し，効果的な医療活動を行うために有効な施策を検討した。【対象と方法】東京都ガイドラインの傷病者フローに従った。発生傷病者数，病床数，保健医療活動チーム数，域内搬送用救急車数，広域医療搬送用回転翼機数の数値を変化させた際の発災後死亡者数への影響を検討した。【結果および考察】発生傷病者数が想定の21,511人では発災後死亡者数は6,641人（30.9%）であるが，想定の0.8倍では3,934 …
We study the possibilities of a search for the light and weakly interacting gauge boson in the gauged $L_\mu - L_\tau$ model. Introducing the kinetic mixing at the tree level, the allowed parameter regions for the gauge coupling and kinetic mixing …
We discuss the Dirac CP violating phase $\delta_{CP}$ in the Froggatt–Nielsen model for a neutrino mass matrix $M_\nu$ imposing a condition $\det\[M_\nu\]=0$. This additional condition restricts the CP violating phase $\delta_{CP}$ drastically. We …
The model of neutrino mass matrix with minimal texture is now tightly constrained by experiment so that it can yield a prediction for the phase of CP violation. This phase is predicted to lie in the range $\delta_{CP}=0.77\pi–1.24\pi$. If neutrino …
We discuss the neutrino mass matrix based on the Occam’s-razor approach in the framework of the seesaw mechanism. We impose four zeros in the Dirac neutrino mass matrix, which give the minimum number of parameters needed for the observed neutrino …