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New, inexpensive production materials boost promise of hydrogen fuel（图）
New inexpensive boost hydrogen fuel
2014/3/20
In a study published last week in the journal Science, chemistry professor Kyoung-Shin Choi and postdoctoral researcher Tae Woo Kim combined cheap, oxide-based materials to split water into hydrogen a...
Backup Hydrogen Maser Steering System for Galileo Precise Timing Facility
Backup Hydrogen Maser Steering System Galileo Precise Timing Facility
2009/9/3
Two hydrogen masers (HMs) are used in the Precise Timing Facility to provide the physical realization of Galileo System Time, insuring the extremely high short-term stability required for the navigati...