By Margherita Hack
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What are the halcyon days? On what date do the puppy days commence? what's Hansel Monday? How do chinese language, Muslim, Mesoamerican, Jewish, and Babylonian calendars fluctuate from Christian calendars? The solutions to those and thousands of different fascinating questions on the way in which people have marked and measured time over the millennia are available within the Oxford significant other to the yr.
Inspite of its excessive price and technical value, plasma apparatus remains to be mostly designed empirically, with little support from desktop simulation. Plasma strategy keep an eye on is rudimentary. Optimization of plasma reactor operation, together with changes to house more and more stringent controls on plant emissions, is played predominantly through trial and blunder.
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