Katsumi Kawahara

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treatment systems consisting of new catalyst technologies and particulate filters will be indispensable to meet increasingly stringent global regulations limiting particulate matter (PM) and NOx emissions from heavy duty and light duty diesel vehicles. Diesel particulate filter (DPF) has been established as a key technology in reducing diesel particulate(More)
Following the success of the first VLBI Space Observatory Programme (VSOP), a satellite of a next space VLBI project, ASTRO-G/VSOP-2, is being designed. Very long baseline interferometry (VLBI) is a technique to achieve very high angular resolution imaging of celestial radio sources by combining the signals from widely separated radio telescopes. Space VLBI(More)
In the process of developing refrigerating systems for alternative refrigerants, two problems must be solved. First, chlorine-free refrigerants cause a decrease in lubricating ability. Second, impurities and decomposition of refrigerant oils cause capillary tube clogging. Among all types of compressors, rotary compressors face the most serwus problems.(More)
1. INTRODUCTION. In dental education, it is valuable to show visually the differences between a good-fitting and an ill-fitting complete denture. A vector of masticatory forces across all the teeth of the denture is available to estimate the capability of the denture. The vector is simple while the forces exerted on a denture are very complex. A vector has(More)
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