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1261. Abstract
... Nonlinear Transformation of Acoustic Waves in Microinhomogeneous Media with Relaxation . V.E.Nazarov, V.Yu.Zaitsev, I.Yu.Belyaeva (Institute of Applied Physics RAS, Nizhny Novgorod, Russia) . ... A nonlinear equation of state and the corresponding wave equation are derived in the framework of a rheological model suggested for elastic media containing defects with relaxation. ... For real solids, these inclusions may model, for example, cracks, intergrain contacts and other similar defects. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearTransformationofAcousticWavesinMicroinhomogeneousMediawithRelaxation.htm -- 7.3 Кб -- 10.07.2002
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1262. Abstract
... Nonlinear Transient Bubble Oscillations . ... The investigation considers issues associated with transient regime of nonlinear bubble oscillations. The nonlinear response of a gas bubble to a low frequency pumping wave results in parametrically-generated shape oscillations above a well-defined threshold. This may be detected through insonification of the bubble by a high-frequency imaging wave, leading to the subharmonic and fundamental combinations frequency signals. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearTransientBubbleOscillations.htm -- 7.2 Кб -- 10.07.2002
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1263. Abstract (Invited)
... Nonlinear Vibro-Acoustic Imaging for Non-Destructive Flaw Detection . ... The matter is that much larger gap and roughness for realistic boundaries of cracked defects may prevent development of nonlinear effects for small vibration amplitudes in high frequency range. ... A scanning laser vibrometer is used for measuring the local vibration spectra. Resonant field patterns of the sample have to be avoided because local vibration knots appear as "dark areas" in both linear and nonlinear images. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearVibroAcousticImagingforNonDestructiveFlawDetection.htm -- 7.3 Кб -- 10.07.2002
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1264. Abstract
... Nonlinear Vibroacoustic Processes on the Biological Tissue . I.Y.Demin (Nizhny Novgorod State University of Architectural and Civil Enginering, Nizhny Novgorod, Russia); B.N.Klochkov (Istitute of Applied Physics RAS, Nizhny Novgorod, Russia) . ... The highest nonlinearity level is observed in relaxed tissue state. ... The considered acoustic phenomena on the surface and in the volume of a live tissue indicate an opportunity to study the tissue state by purely acoustic methods. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearVibroacousticProcessesontheBiologicalTissue.htm -- 6.7 Кб -- 10.07.2002
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1265. Abstract
... Nonlinear Wave Effects in a Zone of Power Seismic Vibrators . ... The authors by experiments have shown, that the process of radiating of seismic wave fields with the help of power seismic vibrators is conducted by shaping of fields of other physical nature. ... In case of failure of a requirement of a continuity of the vibrator with underlying medium the effect of physical nonlinearity in a zone of radiating of seismic transientss is exhibited. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearWaveEffectsinaZoneofPowerSeismicVibrators.htm -- 6.7 Кб -- 10.07.2002
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1266. Abstract (Invited)
... Nonlinearity Parameter Measurement and Characterization of Microstructural States in Solids . ... Novel harmonic generation measurement techniques have been developed to obtain in-situ nonlinearity parameters of metallic materials. ... Experimental arrangements are discussed and experimental results are directly compared with values predicted from theoretical calculations of the microstructural contributions in aluminum single crystals, aluminum alloys, and stainless steels. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearityParameterMeasurementandCharacterizationofMicrostructuralStatesinSolids.htm -- 6.4 Кб -- 10.07.2002
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1267. Abstract
... Nonlinearity and Slow Dynamics in Rocks: Response to Changes of Temperature and Humidity . J.TenCate, T.J.Shankland (Los Alamos National Laboratory, Los Alamos, NM, USA) . ... As revealed by longitudinal bar resonance experiments, materials such as rocks and concrete show a wide range of nonlinear elastic behavior. We have examined the time-dependent changes of linear and nonlinear elastic properties of rocks in response to changes in relative humidity (RH) and temperature. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearityandSlowDynamicsinRocksResponsetoChangesofTemperatureandHumidity.htm -- 6.8 Кб -- 10.07.2002
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1268. Abstract
... Nonlinearity of Sound Wave Propagation and Stimulated Brillouin Scattering Process . A.I.Erokhin (Nonlinear Optics and Light Scattering Laboratory, Lebedev Physical Institute, Moscow, Russia) . ... Hypersound intensity in SBS process usually exceeds some kW/cm2 and is naturally expected to reveal nonlinear features. ... It causes the atypical acoustic nonlinearity appearance. ... New experimental approaches for investigation of intense hypersound propagation in liquids have been tried. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearityofSoundWavePropagationandStimulatedBrillouinScatteringProcess.htm -- 6.8 Кб -- 10.07.2002
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1269. Abstract
... Nonthermal Impact of High Intensity Ultrasound on a Malignant Tumor . V.A.Burov, O.V.Rudenko (Department of Acoustics, Faculty of Physics, Moscow State University, Moscow, Russia); N.P.Dmitrieva (Koltsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia) . ... The progress of resent researchers of "universal" immune response of organism to malignant cells as a reaction induced by a telomerase [1] encouraged us to review the old results, obtained many years ago [2]. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonthermalImpactofHighIntensityUltrasoundonaMalignantTumor.htm -- 7.7 Кб -- 10.07.2002
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1270. AUTHOR : Noullez A
. AUTHOR : Noullez A. 1. ааа On the Self-Similar Behavior of the Intense Acoustics Noise . A.Noullez (Observatoire de Nice, Nice, France); S.N.Gurbatov (Department of Radiophysics, University of Nizhny Novgorod, Nizhny Novgorod, Russia ) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NoullezA.htm -- 5.7 Кб -- 10.07.2002
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1271. Abstract
... Numerical Analysis of Finite-Amplitude Wide Acoustic Beams in Two-Phase Marine Sediments . ... Numerical investigation of nonlinear three-dimensional acoustic wave propagation is finding increasing application in various problems where complicated combination of nonlinear and diffraction processes makes an analytical study very difficult. In the present report the computational analysis is applied to study high-intensity acoustic beam propagation in two-phase water-filled marine sediments. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NumericalAnalysisofFiniteAmplitudeWideAcousticBeamsinTwoPhaseMarineSediments.htm -- 7.2 Кб -- 10.07.2002
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1272. AUTHOR : O'Neill B
AUTHOR : O'Neill B. 1. ааа Development of a Nonlinear Boundary Condition Approach as a New Model for the Nonlinear Acoustic а Interface Problem . B.O'Neill, J.Sadler, R.Maev (Department of Physics, University of Windsor, Windsor, Canada) . ... W.Arthur, B.O'Neill, R.Maev (Department of Physics, University of Windsor, Windsor, Canada); I.Solodov (Department of Acoustics, Faculty of Physics, Moscow State University, Moscow, Russia) . ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/O'NeillB.htm -- 8.5 Кб -- 10.07.2002
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1273. AUTHORS - O
. AUTHORS - O . 1. ааа Odina N. I. (1) . 2. ааа O'Neill B. (4) . 3. ааа Oraevsky A. (1) . 4. ааа Ostrovsky L. A. (2) . 5. ааа Ostrovsky D. B. (1) . 6. ааа Osypik J. I. (1) . 7. ааа Ovchinnikov O. B. (1) . 8. ааа Ovsjannikova E. I. (1) . 9. ааа Ozer S. (1) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/O.htm -- 8.2 Кб -- 10.07.2002
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1274. Abstract
... The acoustic fundamental properties of microcapsule are discussed. ... Microcapsules are surrounded by thin shell that has elasticity and stiffness and behave the vibration mode different from a free bubble. ... The behavior of some typed microcapsules in acoustic field is recorded by using a high-speed video camera (FASTCAM, Photoron, Japan). ... In the case of higher pressure, the microcapsule shows spherical vibration mode like a free bubble. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/ObservationoftheBehaviorofaMicroCapsulebyUsingaHighSpeedVideoCamera.htm -- 7.0 Кб -- 10.07.2002
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1275. Abstract (Invited)
... Octupole Noise Radiation of Turbulent Jet and It Connection with Large Scale Structures . ... The new method of experimental investigation of turbulent jet noise was elaborated. This method is based on azimuthal decomposition of noise with the help of a circular array. The source localization procedure was based on the aeroacoustic theory of noise generation in vortex rings (quadrupole and octupole components) built by authors and with the use of special stroboscope vizualization. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/OctupoleNoiseRadiationofTurbulentJetandItConnectionwithLargeScaleStructures.htm -- 7.1 Кб -- 10.07.2002
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1276. AUTHOR : Odina N
. AUTHOR : Odina N. I. 1. ааа Electroacoustic Coefficients for Strontium Titanate in the Vicinity of Structural Phase Transition . A.Korobov, Yu.A.Brazhkin, N.I.Odina (Department of Acoustics, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia) .
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/OdinaNI.htm -- 5.8 Кб -- 10.07.2002
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1277. Abstract (Invited)