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Roland changes at some point between the parting of the two ensigns in Pearl Harbor and their meeting at sea . " " The relationship between Roche and Dr. Alfred Sommer of the Johns Hopkins School of Public Health has been an extraordinarily fruitful one , " said Roland Bronnimann , global head of the Roche vitamins division . The allusion is either to Browning 's " Childe Roland to the Dark Tower Came " or to the medieval French poem " Chanson de Roland . V. Kofi Agawu , professor of music and director of the African Studies program at Princeton University ; Roland Carter , professor of music at the University of Tennessee and renowned composer and arranger ; and Paschal Younge , assistant professor of music and director of the World Music Center , African Music Studies , African Drumming and Dance Ensemble at West Virginia University . We also plan to take a hard look at increasing our production of low-sulfur fuels , " said Roland Kell , refinery general manager .