Hitoshi Uehara

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A 47-year-old man was admitted to our hospital for community-acquired pneumonia complicated with acute renal failure. Legionella pneumophila serogroup type 1 was grown in BCYE (buffered charcoal yeast extract) agar for sputum culture. Although his respiratory illness responded to intravenous erythromycin therapy, renal failure worsened and necessitated(More)
We have developed a parallel rendering software for scientific visualization of large-scale, threedimensional, time development simulations. The goal of this software, MovieMaker, is to generate a movie, or a series of visualization images from totally one TB-scale data within one night (or less than 12 hours). The isocontouring, volume rendering, and(More)
This paper proposes the new inverter topology which improves the motor efficiency of switched reluctance motor (SRM) for electric vehicle (EV). The SRMs generate the regenerating power even in motoring mode, and the regenerating power flows in both directions of battery and coils. The proposed inverter I - IV can control the flows of regenerating power to(More)
This paper proposes inverter circuit with snubber circuit to suppress the overvoltage of inverter circuit I which can use regenerative power effectively to improve the efficiency. And the effect of overvoltage suppression is verified. Furthermore, the influences of excitation angle and resistance are analyzed by simulation results using MATLAB Simulink. The(More)
In past 20 years, many countries are facing the crisis of energy shortage and environment pollution problems due to the large usage of gasoline vehicles. In order to improve the present situation, the design and manufacture of pure electric vehicles have been becoming to mainstream of the development of automobile industry in the world. High efficient(More)
The three magnetization modes in which the magnetization region is shifted according to load based on a linear torque equation are proposed. Efficiency comparison test of the proposed method and a voltage PWM control method is conducted with a real system.