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In solid-state physics, the valence band and conduction band are the bands closest to the Fermi level, and thus determine the electrical conductivity of...

Mode locking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds...

Yun Wang (born 1964) is a poet and cosmologist. She is originally from Gaoping, a small town near Zunyi, in Guizhou Province, China. Yun Wang received...