One of the headliners at Solar Power International’s Monday General Session was Dr. Cheryl Martin, Deputy Director of the U.S. Energy Department’s Advanced Research Projects Agency-Energy (ARPA-E), a program that seeks to clear pathways for new energy technologies to enter the market. Dr. Martin spoke to RenewableEnergyWorld.com before her keynote to offer some insights into how the ARPA-E functions and to shed some light on the cool, new innovations coming down the pike.