[Front cover] IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control - July 2005 Vol. 52 No. 7

Spatio-Temporal and Spectral Domain Data Obtained by Ultrasonic System with Lateral Scanning: the cover\´s upper image shows the output waveform of the wide-aperture, line-focused ultrasonic system recorded for a brass foil 0.2 mm thick as a function of time t and lateral position of the receiving transducer x. The amplitude and phase of the spectrum of the recorded data are presented in the left and right lower pictures, respectively, where f is the frequency and fx is the spatial frequency. Because of the strong dispersion of Lamb waves, the experimental waveform is complicated, whereas in the spectrum the symmetric S0, S1, S2 and antisymmetric A0, A1 modes appear as phase jumps at the critical angles of the leaky Lamb waves. Images courtesy of Roman Gr. Maev, Sergey A. Titov, and Alexey N. Bogatchenkov. R.Gr. Maev and S. A. Titov are with the University of Windsor, Department of Physics, Windsor, Ontario, Canada. A. N. Bogatchenkov is with the Institute of Biochemical Physics of the Russian Academy of Science, Moscow, Russian Federation. See article S. Titov, R. Maev, A. Bogatchenkov, "Wide-aperture, line-focused ultrasonic material characterization system based on lateral scanning," IEEE Trans. Ultrason., Ferroelect., Freq. Contr., vol. 50, no. 8, pp. 1046-1056, Aug. 2003.