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801. AUTHOR : Ebbini E
. AUTHOR : Ebbini E. S. 1. ааа High-Contrast Pulse-Echo Ultrasonic Imaging with Post-Beamforming Nonlinear Filters . E.S.Ebbini, P.Phukpattarnont, H.Yao (Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, USA) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EbbiniES.htm -- 5.8 Кб -- 10.07.2002
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802. AUTHOR : Eckl C
. AUTHOR : Eckl C. 1. ааа Solitary Surface Acoustic Waves . A.Mayer (Institute for Theoretical Physics, University of Regensburg, Regensburg, Germany); A.M.Lomonosov (General Physics Institute, Moscow, Russia); P.Hess (Institute of Physical Chemistry, University of Heidelberg, Heidelberg, Germany); C.Eckl (Infineon Technologies AG, Munich, Germany); A.S.Kovalev (Verkin Institute for Low Temperature Physics and Engineering, Kharkov, Ukraine) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EcklC.htm -- 5.9 Кб -- 10.07.2002
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803. AUTHOR : Ecotiere D
. AUTHOR : Ecotiere D. 1. ааа The Behaviour of the Acoustic Gyrometers for Transient and High Rotation Rates . M.Bruneau, D.Ecotiere, N.Tahani (Laboratoire d'Acoustique de l'Universite du Maine, UMR CNRS 6613, Universite du Maine, Le Mans, France.) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EcotiereD.htm -- 5.8 Кб -- 10.07.2002
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804. Abstract
... Effectiveness of Water Sonolysis . ... This work describes results of analysis of characteristics of water sonolysis . dissociation of water in acoustic fields. The effectiveness of water sonolysis (which is introduced as a ratio of the energy of decayed chemical bonds to the acoustic energy dissipated in water) was estimated for many experimental data. ... It is discussed the temperature dependence of the sonolysis effectiveness. ... Possible mechanism of water sonolysis is discussed. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EffectivenessofWaterSonolysis.htm -- 6.5 Кб -- 10.07.2002
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805. Abstract (Invited)
... Effect of Cavitation on Ultrasound Absorption in Biological Tissue . ... In biological tissue, the application of a high intensity ultrasound field often gives rise to acoustic cavitation. ... Our approach to quantify this enhanced absorption is to consider the bubble acoustic radiation mechanism calculated from a Rayleigh-Plessey equation in order to estimate a nonlinear .global attenuation coefficient. of the tissue with cavitation bubbles. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EffectofCavitationonUltrasoundAbsorptioninBiologicalTissue.htm -- 7.1 Кб -- 10.07.2002
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806. Abstract
... Effect of Ultrasonic Treatment on Aqueous Dispersion of Inorganic and Organic Pigments in Presence of Water-Soluble Polymers and Surfactants . ... The stability of aqueous dispersions of inorganic pigments Ti02 (rutile) and Fe203 (red) under ultrasonic treatment in the presence of ethylhydroxy(ethyl)cellulose (EHEC) was studied. ... Without polymer the ultrasonic treatment of a dilute Ti02 and Fe203 aqueous dispersions results in a rapid complete coagulation of the dispersions. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EffectofUltrasonicTreatmentonAqueousDispersionofInorganicandOrganicPigmentsinPresenceofWaterSolublePolymersandSurfactants.htm -- 8.3 Кб -- 10.07.2002
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807. Abstract
... Effect of the Nonlinear Properties of Piezoactive Materials on the Characteristics of Radiating Transducers . ... Electromechanically active materials - piezoceramics and magnetostrictive compounds of different metals, are characterized by a nonlinear relation between the mechanical and electric (magnetic) state parameters. ... However, the main effect caused by the nonlinear properties of material is the limitation on the growth of acoustic radiation power with increasing excitation level. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EffectoftheNonlinearPropertiesofPiezoactiveMaterialsontheCharacteristicsofRadiatingTransducers.htm -- 7.3 Кб -- 10.07.2002
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808. Abstract
... Effects of Cavitation Induced by Low-Power Focused Ultrasound in the Presence of an US Contrast Agent: Study on Rabbit Brain in Vivo . ... Objective: To study histological changes produced by pulsed focused US in the brain in the presence of an intravenous gas-based contrast agent, as a function of the US pressure amplitude. ... Results: We found vascular effects ranging from no or very little damage to severe injury associated with brain tissue degeneration. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EffectsofCavitationInducedbyLowPowerFocusedUltrasoundinthePresenceofanUSContrastAgentStudyonRabbitBraininVivo.htm -- 7.7 Кб -- 10.07.2002
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809. Abstract
... Effects of Pulsed Focused Ultrasound at Pressures Beyond the Cavitation Threshold: Histological Study on Rabbit Brain in Vivo . ... Objective: To study histological effects of high intensity short-pulsed focused ultrasound on mammalian tissues. ... MR-imaging was used to aim the beam, monitor the exposure, and evaluate the effects. ... Conclusion: High intensity focused ultrasound can cause tissue damage by destroying brain tissue due only to the mechanical impact of ultrasound beam. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EffectsofPulsedFocusedUltrasoundatPressuresBeyondtheCavitationThresholdHistologicalStudyonRabbitBraininVivo.htm -- 7.2 Кб -- 10.07.2002
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810. Abstract
... Effects of Sediment Nonlinearity on Earthquake Ground Motions . ... The shear deformation is of primary importance for the dynamics of soil, since the shear waves cause most of the building damage during earthquakes. The shear nonlinearity of soil is of a strain-softening, hysteretic type, which means that the effective shear modulus decreases and damping increases with increasing strain. ... We will review the data on soil nonlinearity inferred from recent earthquake records. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EffectsofSedimentNonlinearityonEarthquakeGroundMotions.htm -- 7.6 Кб -- 10.07.2002
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811. Abstract
... Effects of Spatially Periodic Temperature Distribution on Amplification of Energy Flux of a Nonlinear Acoustic Pulse Propagating in a Gas-Filled Tube . ... When a nonlinear acoustic pulse is propagated unidirectionally in a gas-filled tube under an axial temperature gradient on the tube wall, it is shown in [1] that amplification of the energy flux can take place by thermoacoustic effects, if the gradient is suitably positive. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EffectsofSpatiallyPeriodicTemperatureDistributiononAmplificationofEnergyFluxofaNonlinearAcousticPulsePropagatinginaGasFilledTube.htm -- 7.2 Кб -- 10.07.2002
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812. Abstract
... Efficiency of Ultrasonic Peening in Fatigue Improvement . ... The results of fatigue testing showed that UP is the most efficient technique for increasing the fatigue life of welded elements as compared to such existing improvement treatments as shot peening, hammer penning, etc. ... This report describes the results of investigation of the mechanism and efficiency of UP for increasing the fatigue life of welded elements (low carbon steel, aluminum alloys). ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EfficiencyofUltrasonicPeeninginFatigueImprovement.htm -- 7.3 Кб -- 10.07.2002
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813. AUTHOR : Eglit M
. AUTHOR : Eglit M. E. 1. ааа Elastic Waves in Inhomogeneous Media and Structures . N.S.Bakhvalov, K.Yu.Bogachev (Department of Computational Mathematics, Faculty of Mechanics and Mathematics, Moscow State University, Moscow, Russia); M.E.Eglit (Department of Fluid Mechanics, Faculty of Mechanics and Mathematics, Moscow State University, Moscow, Russia) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EglitME.htm -- 5.9 Кб -- 10.07.2002
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814. AUTHOR : Egorychev S
. AUTHOR : Egorychev S. A. 1. ааа The Normal Waves Excitation by the Pulse Parametric Acoustic Array in the Shallow-Water Waveguide . V.Kurin, S.A.Egorychev, S.N.Gurbatov, N.V.Pronchatov-Rubtsov (Nizhny Novgorod State University, Nizhny Novgorod, Russia) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EgorychevSA.htm -- 5.8 Кб -- 10.07.2002
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815. AUTHOR : Ekonomov A
. AUTHOR : Ekonomov A. N. 1. ааа Influence of Internal Structure of Polycrystalline Copper on Its Nonlinear Elastic and Acoustic Properties . A.I.Korobov, A.N.Ekonomov (Department of Acoustics, Faculty of Physics, Moscow State University, Moscow, Russia) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EkonomovAN.htm -- 5.8 Кб -- 10.07.2002
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816. Abstract (Invited)
... Elastic Waves in Inhomogeneous Media and Structures . ... Elastic wave propagation in periodically stratified media as well as in thin layered plates and rods is studied. ... The so-called effective equations are derived by the method of two-scale asymptotic expansions [1] over d. The aim is to describe dispersion of waves. That is why the equations up to terms of the second order over d are considered. ... Effective equations with dispersion for wave propagation in periodic media. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ElasticWavesinInhomogeneousMediaandStructures.htm -- 7.9 Кб -- 10.07.2002
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817. Abstract
... Electroacoustic Coefficients for Strontium Titanate in the Vicinity of Structural Phase Transition . ... The measurements of relative change of 30-MHz-longitudinal wave velocity as a function of external electric field are carried out. ... The linear additions to square-law dependence of ultrasound velocity as a function of electric field are observed by approaching to phase transition temperature in both cases. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ElectroacousticCoefficientsforStrontiumTitanateintheVicinityofStructuralPhaseTransition.htm -- 7.1 Кб -- 10.07.2002
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818. Abstract
... Electromagnetic Generation of High Harmonics of Ultrasound in Magnets . ... The propagation of ultrasound in magnetoelastic materials is accompanied by generation of high harmonics due to elastic nonlinearity and effective anharmonicity of coupled acoustic and spin waves. ... The generation of high harmonics of surface acoustic waves is caused by the appearance of elastic deformations synchronized in space and time in magnet. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ElectromagneticGenerationofHighHarmonicsofUltrasoundinMagnets.htm -- 7.3 Кб -- 10.07.2002
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819. AUTHOR : Emelianov S
. AUTHOR : Emelianov S. Y. 1. ааа On Nonlinear Acoustics Methods in Medical Diagnostics . A.M.Sutin (Stevens Institute of Technology, Hoboken, and Institute of Applied Physics RAN, Nizhny Novgorod, Russia); S.Y.Emelianov (Biomedical Engineering Department, University of Michigan, Ann Arbor, MI, USA); A.M.Tatarinov, A.P.Sarvazyan (Artann Laboratories, North Brunswick, NJ, USA) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EmelianovSY.htm -- 5.9 Кб -- 10.07.2002
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820. AUTHOR : Enflo B
... Tekniska Hogskolan, Stockholm, Sweden ); C.M.Hedberg (Mechanical Engineering Department, Blekinge Institute of Technology, Karlskrona, Sweden); O.V.Rudenko (Department of Acoustics, Faculty of Physics, Moscow State University, Moscow, Russia.) . ... I.Molotkov (Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, IZMIRAN, Moscow Region, Troitsk, Russia); B.O.Enflo (Department of Mechanics, Royal Institute of Technology, Stockholm, Sweden) . ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/EnfloB.htm -- 7.6 Кб -- 10.07.2002
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