[Front cover] IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control - May 2005 Vol. 52 No. 5

The UFFC 50th Anniversary Medallion shown on the cover was designed by Paul Doto of IEEE staff to commemorate the celebration of the 50th Anniversary of the Ultrasonics, Ferroelectrics, and Frequency Control Society which took place during the 2004 IEEE International Ultrasonics, Ferroelectrics and Frequency Control 50th Anniversary Joint Conference 24-27 August 2004 that was held in the historic city of Montr??al, Quebec, Canada, at the Palais des Congres, Montreal´s convention center. The metallic rendering was prepared by Lapel Pins R Us who were commissioned to make lapel pin mementos for the attendees.