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We are carrying out near-infrared spectroscopy of Cepheids in the Galactic nuclear disk. The H-band spectra taken with SUBARU/IRCS indicate that their kinematics are consistent with the rotation of the nuclear disk.
This paper presents an overlapping generations model with technology choice and imperfect financial markets, and examines the evolution of the income distribution in economic development. The model shows that improvements in financial infrastructure facilitate economic development both by raising the aggregate capital–labor ratio and by causing a technological shift to more capital-intensive technologies. Although a higher capital–labor ratio under a given technology reduces inequality, a technological shift can lead to a concentration of economic rents among a smaller number of agents. We derive the condition under which an improvement in financial infrastructure actually decreases the average utility of agents.
We study the initial value problem for the drift-diffusion model arising in semiconductor
device simulation and plasma physics. We show that the corresponding stationary problem in
the whole space ℝn admits a unique stationary solution in a
general situation. Moreover, it is proved that when n ≥ 3, a unique
solution to the initial value problem exists globally in time and converges to the
corresponding stationary solution as time tends to infinity, provided that the amplitude
of the stationary solution and the initial perturbation are suitably small. Also, we show
the sharp decay estimate for the perturbation. The stability proof is based on the time
weighted Lp energy method.
PtRu bimetallic nanoparticles supported on carbon nanoparticle (PtRu/C) catalysts were synthesized with radiation irradiation. The samples were structural analyzed by techniques of X-ray absorption fine structure (XAFS), transmission electron microscope (TEM) and X-ray diffraction (XRD). The results indicated that PtRu/C catalysts which prepared by an electron beam irradiation had more homogeneous atomic arrangement than that prepared by a gamma-ray irradiation. We found a clear correlation between the atomic structure and the catalytic activity of PtRu/C catalysts. These results supported the bi-functional mechanism.
The free electron laser (FEL) of 450 or 500 nm was irradiated onto the pressed C60 powder in vacuum. The grains with μm-order were observed showing the colors of blue, purple, yellow, and white in optical microscope images. The Ag(2) derived mode around 1460 cm−1 in Raman spectra was observed from the grain, indicating the polymerization. The 100 μm-length grain was obtained just after dissolving the FEL irradiated specimens into the toluene and evaporating it. In order to expand the scale of C60 polymer grains and to obtain an amorphous C60 polymer, the FEL irradiation was carried out in solution to reduce the directivity for polymerization. Although polymerization was not promoted in C60 precipitation in supersaturated solution due to low density of C60, the precipitation grown with the liquid-liquid interfacial precipitation (LLIP) method showed the 1454 cm−1 Ag(2) derived mode in addition to the peaks around 1460 cm−1 in toluene. In m-xylene with LLIP method, in a whole area of C60 pillar-grains, polymerization was confirmed by the Raman analysis.
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