The Memorial Hospital of Rhode Island has named a new chief executive officer and president. Martin E. Tursky will take the helm of the 294-bed community hospital in Pawtucket on Oct. 1. He will replace Francis Dietz, who has served as the hospital's chief executive for nearly 47 years. Tursky was recruited in 2010 to serve as executive vice president/COO at Memorial Hospital and has worked closely with Dietz for the past year.