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The evolution of cosmic perturbations in a two-component ultralight axionic universe is investigated. We present the first spectral computation of perturbations in multi-component universes. A particular case composed of light extreme axions and free massive particles offers a possibility for the formation of very high-redshift massive galaxies, which are typically required to host massive early quasars. Our computation retains the information of perturbed velocities for individual axion components, opening a new avenue for setting up initial conditions for future axion dark matter simulations., Comment: 10 pages, 8 figures

In this study, bamboo charcoal materials were blended into polyvinyl alcohol (PVA) solution in various proportions to prepare bamboo charcoal/PVA fibers. A series of estimation was executed to discuss the performance of above fibers such as far infrared ray emission, heat preservation, deodorization of ammonia gas, and the adsorption of methylene blue. The spectrum of far infrared ray of bamboo charcoal/PVA fiber revealed that the average emission rate between 8–14 μm wavelengths increased with the increase in the bamboo charcoal content. From the heat preservation test, it is obvious that the surface temperature of bamboo charcoal/PVA fiber also increased with the increase in the bamboo charcoal content. This increase in content in the fiber specimen achieved a superior adsorption performance for ammonia gas and methylene blue.