908 research outputs found

    Anderson Localization in the Sky and Cosmological Magnetic Field

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    We discuss the Anderson localization of electromagnetic fields in the fluctuating plasma induced by the gravitational density perturbation before the recombination time of the Universe. Randomly distributed localized coherent electromagnetic fields emerge in the thermal equilibrium before the recombination time. We argue that the localized coherent electric fields eventually produce cosmological magnetic fields after the decoupling time.Comment: 13 pages, latex, epsfj, 3 figure

    Behavior Report

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    Shoreline Devastation of Hota Coast by Man-made Causes

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    AbstractThe impact of the removal of a river mouth bar as a measure against river mouth closure to the surrounding coasts was investigated, taking the Hota coast as an example. Also, on this coast, landfilling was extensively carried out to build a coastal road along the coastline, resulting in the narrowing of the natural sandy beach. These anthropogenic factors affected the overall shoreline on a pocket beach, devastating the natural coastal environment. We investigated the effects of these impacts using aerial photographs and field observations

    Application of continuous light in a plant factory system 4. Physiological changes and concept of injury induction in plant leaves under continuous light

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    Physiological changes and concept of injury induction occurring under continuous light are comprehensively reviewed. Continuous light usually reduces photosynthetic rate, which may relate to changes in transpiration and leaf necrosis caused by reactive oxygen species. Other factors apart from photosynthesis may also affect leaf injuries occurring under continuous light. Continuous light sometimes increases carbohydrate and some secondary metabolite contents

    Observation of the 4f146s2 1S0−4f135d6s2(J=2)4f^{14}6s^{2}~^1S_0- 4f^{13}5d6s^{2}(J=2) clock transition at 431 nm in 171^{171}Yb

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    We report on the observation of the 4f146s2 1S0−4f135d6s2(J=2)4f^{14}6s^{2}~^1S_0- 4f^{13}5d6s^{2}(J=2) transition at 431 nm in 171^{171}Yb by depleting atoms in a magneto-optical trap formed by the 6s2 1S0−6s6p 3P16s^{2}~^1S_0-6s6p~^3P_1 intercombination transition. The absolute frequency of the transition to the F=3/2F=3/2 state is determined to be 695 171 054 858.1(8.2)695~171~054~858.1(8.2)~kHz against physical realization of Coordinated Universal Time maintained by the National Metrology Institute of Japan with a frequency comb. The gg factor of the transition to the F=3/2F=3/2 state and the A hyperfine constant are measured to be gJ=1.54(13)g_J=1.54(13) and 1123.273(13)~MHz, respectively. More precise spectroscopy of this transition can lead to searches for time variation of the fine structure constant and searches for new physics with isotope shift measurements.Comment: 5 pages, 4 figure
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