U.S. Patent Mar. 14, 2006 Sheet 7 0f 7 US 7,013,092 B2 5WE9:“6 5 m .UEm m W. I|_r |lml k _ zmas 53 2“sa; _ _ _ 2EE2053 a » \_+ RSago/553 _ _ _ _ _ 2_ _ _ _ _ _ _ _ _ _