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1101. AUTHOR : Alekseev D
. AUTHOR : Alekseev D. P. 1. ааа Coherent Acoustic Scattering From Nonlinear Layers . I.Didenkulov, D.P.Alekseev, A.A.Baranov (Institute of Applied Physics, Nizhny Novgorod, Russia) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AlekseevDP.htm -- 5.7 Кб -- 10.07.2002
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1102. AUTHOR : Aleshin V
. AUTHOR : Aleshin V. 1. ааа Experimental Investigations on Parametric Antenna Operation in Granular Materials . V.Tournat, V.Aleshin, B.Castagnede (Laboratoire d'Acoustique de l'Universite du Maine, Le Mans, France); V.E.Gusev (Laboratoire de Physique de l'Etat Condense UMR-CNRS, Universite du Maine, Le Mans, France) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AleshinV.htm -- 5.8 Кб -- 10.07.2002
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1103. Abstract
... A Device for Cavitation Activity Measuremnts and Investigation . ... A device for cavitation activity investigation and measurements, Cavitometer IC-3, is described in the presentation. ... An operation principle is based on analysis and elaboration of cavitation noise spectra. ... It has been shown that if cavitation conditions change in such a way that bubbles collapse rate is increased, both intensity of high frequency components (registered up to 10 MHz) and intensity of white noise are...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ADeviceforCavitationActivityMeasuremntsandInvestigation.htm -- 7.2 Кб -- 10.07.2002
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1104. Abstract (Invited)
... A Dynamic Model of Hysteretic Elastic Systems . ... A system of coupled differential equations, one for the displacement field and a second for the state variable, the state variable controls the hysteretic response of an elastic element, has been developed. These equations are a dynamic generalization of the McCall and Guyer model for the description of elastic systems having hysteresis with end point memory. The result of numerical solution to these equations will be described. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ADynamicModelofHystereticElasticSystems.htm -- 6.7 Кб -- 10.07.2002
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1105. AUTHOR : Adler L
. AUTHOR : Adler L. 1. ааа Angle Beam Ultrasonic Spectroscopy to Evaluate Adhesive Layers: Linear and Nonlinear Methods . L.Adler (Adler Cosultants Inc./ Ohio State University, Belleair Beach, Florida, USA); S.I.Rokhlin (Department of Industrial, Welding and System Engineering, Ohio State University, Columbus, USA); J.H.Cantrell (NASA Langley Research Center, Hampton, VA, USA) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AdlerL.htm -- 5.9 Кб -- 10.07.2002
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1106. Abstract
... Advanced Observation and Modeling of Acoustic Cavitation Structures . R.Mettin, W.Lauterborn, D.Krefting, P.Koch (Drittes Physikalisches Institut, Goettingen University, Goettingen, Germany); J.Appel (Drittes Physikalisches Institut, Goettingen University, Germany) . ... High power input of ultrasound to liquids causes acoustic cavitation. In typical resonator set-ups, the cavitation bubbles form dynamic structures that result in an inhomogeneous bubble distribution. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AdvancedObservationandModelingofAcousticCavitationStructures.htm -- 6.3 Кб -- 10.07.2002
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1107. Abstract (Invited)
... Advances in Theoretical Nonlinear Acoustics . ... Several modern trends in nonlinear acoustics are selected to highlight a few of the theoretical advances in this field. Recent industrial applications of sound fields in resonators employ pressure oscillations that exceed by far the small perturbations often assumed to derive many of the classical model equations in nonlinear acoustics. ... Appropriate model equations for nonlinear beam propagation in these situations are reviewed. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AdvancesinTheoreticalNonlinearAcoustics.htm -- 7.1 Кб -- 10.07.2002
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1108. AUTHOR : Ahmetolan S
. AUTHOR : Ahmetolan S. 1. ааа Nonlinear Modulation of Rayleigh Waves in a Layered Elastic Half Space . S.Ahmetolan, M.Teymur (Istanbul Technical University, Department of Mathematics, Istanbul, Turkey) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AhmetolanS.htm -- 5.7 Кб -- 10.07.2002
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1109. Abstract
... Acousto-Electronic Nonlinearity: New Experimental Opportunities Using Ritec SNAP System . ... The paper reports on experimental study of the ? higher harmonic generation due to nonlinear ? acousto-electronic interaction in a piezoelectric ? semiconductor. Ritec SNAP 1-30-I1 system is ? applied to measurements of the interaction ? characteristics in the frequency range up to 30 MHz ? in a CdS single crystal. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcoustoElectronicNonlinearityNewExperimentalOpportunitiesUsingRitecSNAPSystem.htm -- 7.2 Кб -- 10.07.2002
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1110. Abstract (Invited)
... Acousto-Optic Cell Non-Linearity Fed by Two-Frequency Acoustic Signal . ... Acousto-optic (AO) cell is the device that is linear relative to an optic signal and non-linear relative to an acoustic signal. ... In such approximation an optical beam diffracted by two-frequency acoustic signal contains, besides two main maxima, two spurious maxima that decrease the dynamic band of AO cell working as an acoustic signal spectrum analyzer. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcoustoOpticCellNonLinearityFedbyTwoFrequencyAcousticSignal.htm -- 7.1 Кб -- 10.07.2002
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1111. Abstract
... Acousto-Optic Cells with Non-Uniform Length of Light and Sound Interaction . ... The paper examines operation of acousto-optic cells designed with cross section of acoustic columns different from the traditional rectangular form. ... It is evident that application of the ? transducers possessing the complicated shape of the electrodes results in unequal lengths of light and sound interaction over cross section of an incident optical beam. ... Section : 9 ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcoustoOpticCellswithNonUniformLengthofLightandSoundInteraction.htm -- 7.4 Кб -- 10.07.2002
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1112. Abstract
... Acousto-Optical Switch Modules for Vector-Matrix Crossconnect Architectures . ... Input and output ports are ? arranged in linear arrays of 8 single modes fibers. Light from each input port is collimated along the system axis by a microlens and impinges at Bragg incidence on one of the channels of a ? multichannel acousto-optical cell. ... Light reachs the output port after passing ? successively through a Fourier lens and a second multichannel deflector oriented perpendicular ? to the first one. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcoustoOpticalSwitchModulesforVectorMatrixCrossconnectArchitectures.htm -- 7.2 Кб -- 10.07.2002
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1113. Abstract
... Acoustoelectric Nonlinearity in Manganite Films . ... In this report we present results of acoustoelectric (AE) effect study in La0.67Ca0.33MnO3 (LCMO) films over a wide temperature range encompassing the metal-insulator (M-I) transition region. The experiments on the AE effect in the LCMO films unexpectedly revealed an anomalous contribution to the AE current, invariant upon reversal of the SAW propagation, which coexists with the ordinary (odd in the SAW wave vector) effect. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcoustoelectricNonlinearityinManganiteFilms.htm -- 6.8 Кб -- 10.07.2002
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1114. Abstract
... Acoustooptical Tunable Filter with High Resolution . ... The report is devoted to acoustooptics. The spectral selectivity of acoustooptical interaction in the case of Bragg's diffraction makes it possible to use an acoustooptical cell as a filter(AOTF). ... AOTF is used in Wavelength Multiplexing Division Systems (WDM) to choose one of several signals propagating simultaneously in one fiberoptical network. ... This value can be improved by displacing the interaction in other planes of the crystal. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcoustoopticalTunableFilterwithHighResolution.htm -- 7.0 Кб -- 10.07.2002
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1115. Abstract
... Acoustic Emission and Seismic Emission Monitoring of the Foundation of Hydroelectric Power Station Located on Soft Soils . ... If elastic waves are to be propagated in a medium with inhomogeneities (localized defects, stratification, cracks) the characteristics of the information signal, for example, velocity of propagation, amplitude, and spectral contents, can change their parameters [1]. ... These characteristics are processed with a specially developed algorithm. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcousticEmissionandSeismicEmissionMonitoringoftheFoundationofHydroelectricPowerStationLocatedonSoftSoils.htm -- 7.7 Кб -- 10.07.2002
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1116. Abstract
... Acoustic Nonlinearity, Attenuation and Scattering of a Sound in Water with Vapor-Gas Bubbles . ... Nonlinear effects, attenuation and scattering of a sound, originated in propagating of a sound in a liquid with vapor-gas bubbles, are investigated. A liquid with phase inclusions near to phase transition represents an example of complex media, when at determination of the acoustic characteristics it should take into account phase transformations. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcousticNonlinearityAttenuationandScatteringofaSoundinWaterwithVaporGasBubbles.htm -- 7.1 Кб -- 10.07.2002
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1117. Abstract
... Acoustic Nonlinearity Described by Hysteretic Crack Closure Model . ... Nonlinear Elastic Wave Spectroscopy (NEWS) is a novel technique for nondestructive evaluation based on the nonlinear acoustic effects due to cracks leading to the amplitude dependence of the resonance frequency shift, modulation of ultrasound by vibration, high harmonics generation, and amplitude dependence damping. ... This model is adequate to reveal major nonlinear features the NEWS technique is built upon. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcousticNonlinearityDescribedbyHystereticCrackClosureModel.htm -- 6.7 Кб -- 10.07.2002
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1118. Abstract
... Acoustic Streaming in a Cylindrical Tube . ... There is no restriction on tube radius in relation to boundary layer thickness. ... Only the inner vortex is observed when tube radius is comparable to boundary layer thickness, such as within the channels in thermoacoustic engine stacks. Both vortices are prominent for intermediate tube radii. Thermal conductivity is found to increase streaming velocity, while dependence of the viscosity coefficient on temperature partly offsets this increase. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcousticStreaminginaCylindricalTube.htm -- 7.0 Кб -- 10.07.2002
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1119. Abstract
... Acoustic Vision with the Nonlinear Scattered Fields . ... It is known that some of objects have strongly nonlinear acoustic responses. ... Different nonlinear acoustic methods ? have been developed for diagnostics of such acoustically nonlinear objects. Those methods ? allow one mainly to detect acoustically nonlinear inhomogeneities. However for the case when ? size of an object is large compared to the wavelength one may suggest methods of nonlinear ? acoustic imaging of such objects. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcousticVisionwiththeNonlinearScatteredFields.htm -- 7.1 Кб -- 10.07.2002
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1120. Abstract (Invited)
... Acoustics of Aqueous Foams Contain Solid Particles . ... It is shown that a small concentration of the solid particles leads to the growth of the sound wave velocity and increasing of attenuation coefficient. It is found that when the concentration of the solid particles becomes large enough, the attenuation coefficient decreases sharply. ... A small addition of the particles increases the hydrodynamic resistance and causes the growth of the attenuation coefficient. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/AcousticsofAqueousFoamsContainSolidParticles.htm -- 7.3 Кб -- 10.07.2002
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