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Epoxy resin has become an integral part of electronic and electrical devices for their excellent mechanical and electrical performance. Nano-composite technology makes it possible to improve electrical properties of insulating materials. For the use of nanocomposites of epoxy resin, it must be confirmed whether the electrical performance with nanoparticles is different from that without nanoparticles...
This paper investigates the effect of nano-scale Al2O3 on the tracking failure resistance of silicone rubber nanocomposites. The samples were prepared by filling nano-scale Al2O3 in silicone rubber with the weight ratios of 0.25, 0.5, 1, 1.5, 3 wt%. AC voltage (0 kV-50 kV) was applied on a pair of needle-plate electrodes on the nanocomposites surface with insulation distance of 10 mm. The weight loss,...
This paper investigates the effect of nano-scale SiO2 on the tracking failure properties of nanocomposites. Test samples were made by dispersing nano-scale SiO2 powder in epoxy with the weight ratios of 0, 1, 3, 5, 7, 9 wt%. AC voltage was applied on a pair of needle-plate electrodes at the surface with the insulation distance of 10 mm. The time to tracking failure and discharge current were recorded...
This paper describes an active and reactive power regulating system based on a cascaded converter. The system is intended for power leveling of renewable energy sources, as well as for improving power quality and reliability of a power distribution system. The active/reactive power control and the DC side voltage control concentrated in this paper are indispensable for the system's proper operation...
A spark expanded by a magnet was assessed as a low temperature atmospheric pressure source of hydrogen atoms. Calorimeters with masses from less than a gram to about 1 kg were used to measure the hydrogen atom flux and its distribution in a discharge tube of about 200 cc volume in which a spark of 0.3 J was repeated 100 times a second in hydrogen at atmospheric pressure. Spectroscopic observations...
Retrotransposons are mobile genetic elements that accomplished transposition via an RNA intermediate. These elements can be transcriptionally activated by stress factors, such as UV light, ozone, pathogens, wounding and drought. A red alga, porphyra yezoensis has recently been recognized as a model plant for fundamental and applied study in marine biological science. In this paper, pulsed streamer-like...
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