May/June 1998 Feature Articles: Ultrasonic Pulse Echo Technique for Concrete Elements Using Synthetic Aperture - by Dr. M. Krause, Dr. H. Wiggenhauser Profile - Douglas J. Whitely, Dofasco Inc. Technical Tips: Dry Powder Developer, A Well Kept Secret - by John deLuca Safety: "Turning Down the Volume: Eliminating Noise Hazards" - by Irene Lebovics News Release: Natural Resources Canada CANMET NDT Certifying Agency Has New Manager Recent and Up-Coming Regulatory Changes Affecting Rail Tank Cars - by Jean-Pierre Gagnon Letter from the President of the PACNDT NDT and Modern Information Processing - Can We Expect a Computer to Become a Skilled Inspector?