. AUTHOR : Statnikov E. 1. ааа Comparative Study of Effects of Power Ultrasonic Impact Treatment (UIT) and Other Fatigue Life Improvement Methods for Welded Joints in High Strength Steel and Aluminium Alloys . E.Statnikov, V.O.Muktepavel (Northern Scientific & Technology Company, Severodvinsk, Russia); P.J.Haagensen (Norwegian University of Science and Technology, NTNU, Norway); L.Lopez-Martinez (Swedish Steel AB (currently with TWI, UK)) .
. AUTHOR : Stoll C. 1. ааа Use of Ultrasound in Waste Water Treatment . O.V.Abramov, V.M.Kuznetsov (Institute of General and Inorganic Chemistry of RAS, Moscow, Russia); C.Stoll (KACU, Germany) .
. AUTHOR : Strelkov S. 1. ааа The Photoexcitation of Hypersound in Ge in Presence of the Electric Field . N.Chigarev (International Laser Center, Moscow State Univerisity, Moscow, Russia); S.Strelkov, V.G.Michalevich (General Physics Institute RAN, Moscow, Russia) .
. AUTHOR : Streltsov V. N. 1. ааа Phase Conjugation of Nonlinear Acoustic Waves in Piezosemiconductors . A.Brysev, V.G.Mikhalevich, V.N.Streltsov (Wave Research Center of the General Physics Institute RAS, Moscow, Russia) .
... Stress-Dependent Complementary Variations in P- and S-Wave Velocities for Rocks Containing High-Compliance Porosity: an Effective-Medium Model and Comparison with Experiments . ... A 3D effective-medium model describing variation in rock elastic moduli due to presence of high-compliant defects is considered. ... The ratio of the normal-to-shear compliance of the defects was determined for different rock samples. The results confirmed that, in saturated rocks, defect’s shear compliance dominates. ...
... Stroboscopic Pulse Method of Nonlinear Parameters Measurements . ... The method is based on application of ultrasonic pulses and low frequency vibration to the sample. The high frequency ultrasonic pulse time of flight is measured in different phases of the low frequency vibration. ... The experiment was conducted in a sandstone bar with the ultrasonic pulse, frequency 6 MHz, propagating across the bar and the low-frequency vibration excited along the bar. ...
. AUTHOR : Stulov A. 1. ааа Experimental and Computational Studies of the Piano Hammer . A.Stulov (Institute of Cybernetics at Tallinn Technical University, Tallinn, Estonia) .
. AUTHOR : Suchkov S. 1. ааа Initiation of Destructive Strike Acoustic Wave in the Liquid of the Big Volume at the Temperature Near to Boiling Point . S.Suchkov, V.N.Krasnoperov, B.N.Shevtsov (Physics Department, Saratov State University, Saratov, Russia) .
. AUTHOR : Sudenkov Yu. V. 1. ааа Influence of Cavitation and Thermoacoustic Processes on Biological Tissue Destruction Under Action of Laser Pulses with Regular Temporal Structure . N.N.Savitskaya, Yu.V.Sudenkov (Saint-Petersburg State University, St. Petergof, Saint-Petersburg, Russia) . 2. ааа Optical-Acoustic Spectroscopy of Structural Changes in Metals Under Shock Loading . Z.A.Sazhko, Yu.V.Sudenkov (St. Petersburg State University, St. Petersburg, Russia) .
. AUTHOR : Sugimoto N. 1. ааа Effects of Spatially Periodic Temperature Distribution on Amplification of Energy Flux of a Nonlinear Acoustic Pulse Propagating in a Gas-Filled Tube . N.Sugimoto, D.Shimizu (Department of Mechanical Science, Graduate School of Engineering Science, University of Osaka, Osaka, Japan) .
. AUTHOR : Suhuby E. 1. Equivalence Transformations of Maxwell Equations in Rigid Bodies . S.Ozer (Department of Engineering Sciences, ITU Faculty of Science and Letters, Istanbul Technical University, Maslak, Istanbul, Turkey); E.Suhuby (Yeditepe University Department of Mathematics, KaydaП, Istanbul, Turkey) .
... Supercritical Parametric Phase Conjugation of Ultrasound Waves. Application in Nonlinear Acoustic Imaging . ... Parametric wave phase conjugation (WPC) is a new tool for ultrasonic engineering providing time reversal transformation of acoustic beams with giant amplification [1]. Application of parametric WPC for compensation of phase distortions in linear acoustic imaging was already demonstrated. ... Generally speaking, amplification breaks time reversal invariance of a wave field. ...
... Superharmonic Tissue Imaging . ... Medical imaging has recently seen improvement in image quality with second-harmonic (2H) tissue imaging. This was attributed to less reverberations and haze and better sidelobe suppression compared to fundamental imaging. ... Moreover, SH imaging does not suffer from the resolution-sensitivity trade-off and since it operates over a wide frequency band, the axial resolution is further improved. ...
... Surface Acoustic Wave Propagation in the Presence of Strong External Field . ... The paper deals with the change of small amplitude surface acoustic wave (SAW) velocity in the presence of strong generalised field, for example the electric one [1]. ... As a result of computational procedure the sensitivity of SAW velocity to the external field is found. ... 1] Zelenka, J., Kosek, M.: Properties of surface acoustic wave devices under strong external fields. ...
... Surface Mapping of Subharmonic Generated Modes in Finite Piezoelectric Structures . A.Alippi, M.Angelici, A.Bettucci, M.Germano (Department of Energetics, University Rome "La Sapienza", Rome, Italy) . ... Finite piezoceramic transducers vibrating nonlinearly are studied, both experimentally and theoretically. When driven by high voltages, not only higher order harmonics are generated, but the rising of fractional harmonic components is observed, this results being a threshold phenomenon. ...
... Surface Shear Waves in Homogeneous Gradient-Elastic Half Space with Surface Energy . ... It was shown that shear-horizontal waves (i.e. not plane shear wave motions with amplitude, which decreases exponentially with the increase of the distance from free surface) could exist in homogeneous half space, if the problem is analyzed in a framework of the gradient elasticity theory, generalized so that the surface energy is taken into account. ...