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Fuji Electric developed a 1200V class RC-IGBT based on our latest thin wafer process. The performance of this RC-IGBT shows the same relationship between conduction loss and switching loss as our 6th generation conventional IGBT and FWD. In addition its trade-off can be optimized for hard switching by lifetime killer. Calculations of the hard switching inverter loss and chip junction temperature (Tj)...
It is essential to observe seismic activities on the sea floor just above the seismogenic zones where large earthquakes have been occurred. We have developed UT-OBCS, a new ocean bottom cabled seismometer for a high density seismic array network, with utilizing ICT (Information and Communication Technologies), i.e., IP (Internet Protocol) on the seafloor. UT-OBCS is a compact and low cost system....
The Japanese islands are positioned near the plate convergent zones, and large earthquakes have repeatedly occurred in marine areas around Japan. Although there are already approximately 2,000 land-based earthquake observatories in Japan, the number of permanent earthquake observatories in the oceans is quite limited. It is important to observe seismic activities on the seafloor just above these seismogenic...
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