University of Colorado graduate students Xinghui Liu, left, and Vasu Seeram solder a converter for a solar panel during Bob Erickson’s photovoltaic
University of Colorado graduate students Xinghui Liu, left, and Vasu Seeram solder a converter for a solar panel during Bob Erickson's photovoltaic power electronics lab. Erickson is one of four CU faculty members teaching 'massive open online courses' beginning next fall. ( Jeremy Papasso )