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Shibuya-ku, Japan

Kokugakuin University is a private university, whose main office is located in Tokyo's Shibuya district. It was established in 1920. Wikipedia.

Imanaka T.,Kyoto University | Endo S.,Hiroshima University | Sugai M.,Kokugakuin University | Ozawa S.,Nihon University | And 2 more authors.
Health Physics | Year: 2012

Following the news that the radiation level in Iitate Village, located 25-45 km from the Fukushima Daiichi Nuclear Power Plant, was seriously increased, an urgent field survey was carried out on 28 and 29 March 2011. Radiation levels at 130 locations were measured inside a van that traveled throughout the village using a CsI pocket survey meter and an ionization chamber. Soil samples were also taken at five locations and submitted to gamma ray analysis using a Ge detector. A radiation exposure rate of more than 20 μSv h-1 was observed in the southern part of Iitate Village. Volatile radionuclides such as iodine and cesium were found to be the main components of radioactive contamination. A trace amount of plutonium isotopes originating from the accident was also confirmed in several soil samples, the level of which was less than the global fallout. Based on the measured density of radionuclides at the highest contamination location during the present survey, an exposure rate of about 200 μGy h-1 at 1 m above the ground was estimated at the time of the radioactive deposition on March 15. At this location, the cumulative exposure would reach 50 mGy in the middle of May 2011. Copyright © 2012 Health Physics Society.

Sugawara J.,Japan National Institute of Advanced Industrial Science and Technology | Hayashi K.,Japan National Institute of Advanced Industrial Science and Technology | Hayashi K.,Kokugakuin University | Tanaka H.,University of Texas at Austin
Journal of Hypertension | Year: 2014

OBJECTIVES:: Brachial-ankle pulse wave velocity (baPWV) is one of few indices of arterial stiffness that has been incorporated into a routine clinical setting. baPWV is associated with markers of central arterial stiffness, but the absolute values are substantially higher than other PWV measures. We tested the hypothesis that the height-based formulas underestimate actual arterial path lengths overestimating PWV values. METHODS:: Arterial path lengths were measured in 220 adults by the three-dimensional MRI arterial tracing. RESULTS:: Actual path lengths from the heart to the ankle (Lha) and from the heart to the brachium (Lhb) were significantly longer than those estimated by the height-based formula (1464±85 vs. 1439±71 mm and 476±41 vs. 335±19 mm, both P < 0.0001). Consequently, the MRI-based effective path length for baPWV (Lha - Lhb) was shorter than the height-based path length (988±66 vs. 1105±52 mm, P < 0.0001). baPWV re-calculated by using the MRI-based path length was 11% lower than that derived from the height-based path length but was still 45% greater than carotid-femoral PWV (cfPWV). Both height-based and MRI-based baPWV measures were significantly associated with cfPWV (r=0.84 and 0.87, both P < 0.0001). CONCLUSION:: We concluded that the height-based formulas to estimate arterial path length grossly overestimate the actual path length resulting in the overestimation of PWV values and that baPWV was still significantly higher than other PWV measures even when the actual path length is used to calculate. These results suggest that other methodological considerations apart from the arterial path length estimation contribute to higher absolute baPWV values. Copyright © Lippincott Williams & Wilkins.

Sato M.,Honda Electronics Co. | Sato H.,Kokugakuin University
Physics Essays | Year: 2015

The speed of light is observed differently depending on the observer's velocity. Therefore, the Lorentz contraction cannot be derived; the length contraction is unnecessary in physics. Time dilation has been experimentally confirmed. Using Einstein and Feynman light clock, we show that the Lorentz time dilation is derived in Fresnel's ether. The Galilean transformation with Lorentz time dilation is introduced. © 2015 Physics Essays Publication.

Sato M.,Honda Electronics Co. | Sato H.,Kokugakuin University
Physics Essays | Year: 2015

The equivalence of inertial and gravitational masses is discussed. The resistance (i.e., the impedance) from accelerated motion in the ether is considered to be inertia. Mass is an eddy-making resistance generated by the accelerated motion of a massive particle in the ether, in which the eddy is de Broglie wave, that is, adhered photon. The resistance in the ether is isotropic; thus, the inertial mass is equivalent to the gravitational mass. Copyright © 2015 Physics Essays Publication.

Panwar N.,National Central University | Panwar N.,University of Delhi | Chen W.P.,National Central University | Pandey A.K.,Aryabhatta Research Institute of Observational science ARIES | And 5 more authors.
Monthly Notices of the Royal Astronomical Society | Year: 2014

Bright-rimmed clouds (BRCs), illuminated and shaped by nearby OB stars, are potential sites of recent/ongoing star formation. Here we present an optical and infrared photometric study of three BRCs: BRC 5, BRC 7 and BRC 39 to obtain a census of the young stellar population, thereby inferring the star formation scenario, in these regions. In each BRC, the Class I sources are found to be located mostly near the bright rim or inside the cloud, whereas the Class II sources are preferentially outside, with younger sources closer to the rim. This provides strong support to sequential star formation triggered by radiation-driven implosion due to the ultraviolet radiation. Moreover, each BRC contains a small group of young stars being revealed at its head, as the next-generation stars. In particular, the young stars at the heads of BRC 5 and BRC 7 are found to be intermediate-/high-mass stars, which, under proper conditions, may themselves trigger further star birth, thereby propagating star formation out to long distances. © 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.

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