文化財測定用携帯型ラマンイメージング・顕微赤外分光装置の開発研究

We are developing portable Raman imaging and microscopic FT-IR instruments for cultural properties in collaboration with S.T.Japan Inc. and National Museum of Japanese History. In the present study, the Raman spectra of various pigments for oil paintings were recorded with the intention of making a database of the Raman spectra of pigments and dyes. This project is supported by the Research Program on Development of Innovative Technology of Japan Science and Technology Agency.textapplication/pdfdepartmental bulletin pape

Search for matter-dependent atmospheric neutrino oscillations in Super-Kamiokande

We consider ν_μ→ν_τ oscillations in the context of the mass varying neutrino (MaVaN) model, where the neutrino mass can vary depending on the electron density along the flight path of the neutrino. Our analysis assumes a mechanism with dependence only upon the electron density, hence ordinary matter density, of the medium through which the neutrino travels. Fully-contained, partially-contained and upward-going muon atmospheric neutrino data from the Super-Kamiokande detector, taken from the entire SK-I period of 1489 live days, are compared to MaVaN model predictions.We find that, for the case of 2-flavor oscillations, and for the specific models tested, oscillation independent of electron density is favored over density dependence. Assuming maximal mixing, the best-fit case and the densityindependent case do not differ significantly.journal articl

Observation of B+→ΛΛ̅K+

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工学部 分子素材 情報科学基礎2コマコース (平成21年度)

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Enhanced magnetochiral effects at microwave frequencies by a single metamolecule

We have experimentally and numerically studied the directional birefringence of X-band microwaves by magnetochiral (MCh) effects of a single metamolecule under dc magnetic fields at room temperature. Phase and amplitude transmission coefficients from top and bottom, i.e., S parameters of S21 and S12, are measured for the single metamolecule consisting of a copper chiral structure and ferrite cylinder in a waveguide. By applying a dc magnetic field, we observe a difference between S21 and S12, which is an emergence of the MCh effects with simultaneous space-inversion and time-reversal symmetry breaking. Numerical calculation based on a finite element method reproduces well the experimental results of the MCh effects. The MCh effect can be enhanced by using the magnetic resonance of the ferrite cylinder. Notably, numerical calculation predicts that the MCh effect is extremely enhanced by interacting magnetic resonance with a specific resonant structural optical activity, leading to a giant MCh effect. The giant MCh effect observed in the present study originates from the one-way transparency caused by the Fano resonance in the metamolecule.journal articl

Dynamics of suprabasal plasma alanine concentration in response to exercise.

Model fit (red areas) vs experimental data (circles) expressed as mean ± SE from the study 1. The red areas show the range of the dynamic responses of the model to the variability of the subjects’ characteristics as reported in Table 2; individual response curves related to each simulation are available. The gray zone refers to the exercise period. The dark gray zone refers to the exercise performed above the LT until minute 32. A: Trained individuals. B: Untrained individuals.</p