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In Microsoft Research , Mihcak has been working on related problems of audio and video watermarking and robust signal hashing , with an emphasis on security and cryptographic principles . Inc ., for his groundbreaking work in the areas of affordable 3D visual computing and super computing technologies ; and for his technical leadership skills in building Silicon Graphics , Inc ., into a global advanced technology company . Today , more than 4 million barrels of petroleum per day are refined throughout the world wiht platinum-based catalysts . Civil engineers design solutions to cope with many of our planet 's most serious problems - - foul air ; decaying cities , roadways , and bridges ; clogged airports and highways ; polluted streams , rivers , and lakes . Sort operators should only be provided for an equality operator , and they should refer to less-than operators for the left and right side data types respectively .