Kanagawa Institute of Technology is a private university in Atsugi, Kanagawa Prefecture, Japan. The predecessor of the school, a vocational school, was founded in 1963. It was chartered as a university in 1975. The present name was adopted in 1988. Wikipedia.
Takahashi M.,Kanagawa Institute of Technology
Physical Review B - Condensed Matter and Materials Physics | Year: 2016
By applying the coherent potential approximation (CPA) to simple models, we have studied the temperature (T) dependence of the normalized magnetization M(T), and electrical resistivity ρ(T) of highly rare-earth-doped EuO. The present result reveals that in degenerate EuO, the magnetization is described by an electron-doped EuO model; the strong double-dome feature of M(T) of Gd-doped EuO is a consequence of the half-metallicity and low dopant activation. In degenerate EuO, the temperature dependence of the resistivity is well described by Matthiessen's rule as ρ(T)=ρC+ρm(M), where ρC is the nonmagnetic scattering contribution (independent of T) and ρm(M) is the magnetic scattering contribution due to the exchange interaction with localized f spins. ρC is proportional to x(1-x)/n23, while the amplitude of the change in ρm(M) is proportional to n-23, where x is the doped rare-earth density and n is the electron density. The difference in M(T) and ρ(T) between Gd- and La-doped EuO is also discussed. © 2016 American Physical Society.
Saito M.,Kanagawa Institute of Technology
Bioscience, biotechnology, and biochemistry | Year: 2012
We have previously reported that Aloe vera gel had hypoglycemic activity and anti-obesity effects, although the effect on alcoholic fatty liver was unclear. We examined in this present study the effect of an Aloe vera gel extract (AVGE) on hepatic lipid metabolism by using an ethanol-induced transient fatty liver mouse model. Ethanol (3 g/kg of mouse weight) was orally administered to induce an accumulation of triglyceride (TG) and increase the mRNA expression of such lipogenic genes as sterol regulatory element-binding protein-1 (SREBP-1) and fatty acid synthase (FASN) in the liver. Although ethanol ingestion caused a 5.4-fold increase in liver TG, pre-treating with AVGE (1 mg/kg/d) for 1 week significantly suppressed this elevation of the ethanol-induced liver TG level. The expression of lipogenic genes was also lower in the AVGE pre-treatment group than in the control group. This inhibitory effect on the ethanol-induced accumulation of TG was attributed to a reduction in the expression of lipogenic genes that were increased by ethanol.
Yamamoto F.,Kanagawa Institute of Technology
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013
An agent-based modeling and the simulator for evacuation from multistory buildings at the time of outbreak of an earthquake and the fire are presented. The basic theory is that individual agents move in each floor and stair, unless it is filled to capacity per unit area. The simulator can reflect the situation when some destruction occurred in a passage and the stairs in the middle of refuge, because the capacity can be changed dynamically every place. Each agent moves in principle based on local information around oneself. However, as for the cases that the inside of stairs has been clogged up, wide area information equivalent to the broadcast in the hall is conveyed to agents after pre-determined time. Comparative study with the real measurement and simulation was carried out about the refuge time of the fire drill that was performed in a university building of 12 stories. © 2013 Springer-Verlag.
Takahashi M.,Kanagawa Institute of Technology
Physical Review B - Condensed Matter and Materials Physics | Year: 2012
To study electron states and magnetism in Gd-doped EuO theoretically, we first calculate the spin-polarized density of states (DOS) by applying the dynamical coherent potential approximation (dynamical CPA) for two simple models: the s-f model of electron-doped EuO and a model of Eu 1-xGd xO. On the basis of the spin-polarized DOS, we calculate the total energy of electrons interacting with f spins through an exchange interaction. Then, we obtain the magnetization as a function of the temperature T, by minimizing the free energy. We discuss the mechanism of the electron-induced increase in the Curie temperature T C, the origin of the anomalous magnetization curve, and the existence of a threshold Gd concentration for increasing T C. We investigate the effect of on-site attractive potential that yields an impurity level when the Gd concentration is low. We also discuss the relationship between the redshift of the optical absorption edge and the increase in the T C of Gd-doped EuO. © 2012 American Physical Society.
Narahara K.,Kanagawa Institute of Technology
IEICE Electronics Express | Year: 2014
We investigate the three-wave mixing process that is induced by nonlinear envelope pulse collisions in composite right-and left-handed transmission lines with regularly spaced Schottky varactors. For left-handed waves, the wave number decreases as the frequency increases; this results in the resonant interaction of colliding left-and right-moving waves. In this study, we introduce design criteria for the generation efficiency of sum frequency waves using the derivative expansion method; we also introduce a method of generating pulsed second-harmonic waves. © IEICE 2014.