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421. Abstract
... On a Resonant Properties of Magma Structures of the Elbrus Volcano . ... It has been shown that a cavity in a layered half-space is responsible for reradiation of a secondary wave field. Theoretical study reveals eigen frequencies of oscillations of a cavity, excited by a harmonical wave or a pulse, in a half-space. It has been shown that distant earthquakes may excite eigen oscillations of the magma chamber and the magma source of the Elbrus Volcano. ... The frequency range (70 . ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/OnaResonantPropertiesofMagmaStructuresoftheElbrusVolcano.htm -- 6.7 Кб -- 10.07.2002
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422. 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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423. 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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424. 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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425. 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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426. 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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427. 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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428. Abstract
... Non-Uniform Retarded Time Grid Algorithms for the KZK Nonlinear Parabolic Wave Equation . ... Am., 97, 906-917 (1995)] discuss a FDTD implementation of the KZK equation on a uniform retarded time grid for cylindrically symmetric sources. The implementation of a non-uniform retarded time grid over the conventional uniform retarded time grid will be discussed. The non-uniform time grid provides a significant reduction in memory requirements and leads to substantial reduction in computation time. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonUniformRetardedTimeGridAlgorithmsfortheKZKNonlinearParabolicWaveEquation.htm -- 6.5 Кб -- 10.07.2002
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429. Abstract
... Non-Uniqueness of Solutions to Nonlinear Elasticity Equations and Its Reason . ... The self-similar arbitrary discontinuity disintegration problem and piston-problem are considered in framework of non-linear elasticity theory. ... The anisotropy can be a media property or can depend on previous deformations in the discontinuity plane. ... A sufficient criterion of the non-uniqueness of solution is found for an arbitrary hyperbolic system of the conservation laws. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonUniquenessofSolutionstoNonlinearElasticityEquationsandItsReason.htm -- 6.7 Кб -- 10.07.2002
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430. 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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431. 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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432. 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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433. 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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434. Abstract
... Nonlinear Standing Waves in Ultrasonic Liquid Resonators with Planar Piezoelectric Transducers . ... e-mail: physics@sstu.samara.ru . The propagadition of waves of finite amplitude in ultrasonic resonators with planar piezoelectric transdusers is researched. An analytical expression for amplitude-frequency characteristic of ultrasonic resonators is found on the basis of solution to the equation of nonlinear waves in dissipation medium and to the equations of piezoelectric effect. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearStandingWavesinUltrasonicLiquidResonatorswithPlanarPiezoelectricTransducers.htm -- 6.4 Кб -- 10.07.2002
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435. Abstract
... Nonlinear Standing Waves in an Acoustical Resonator with the Longitudinal Mean Temperature Distribution . ... This paper deals with the problem of nonlinear standing waves in the axisymmetrically shaped acoustic resonators where a mean temperature is distributed along their axis. ... The one-dimensional model equation for nonlinear standing waves of the 2-nd order including a viscous boundary layer is modified to take into account a longitudinal distribution of mean temperature. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearStandingWavesinanAcousticalResonatorwiththeLongitudinalMeanTemperatureDistribution.htm -- 6.6 Кб -- 10.07.2002
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436. Abstract
... Nonlinear Surface Acoustic Wave Interaction with Two-Dimensional Electronic System . ... In the region of delocalized electrons nonlinear effects in the SAW attenuation could be explained by the heating of electrons in the electric field of the piezoelectrically active SAW and could be described in terms of the electronic temperature Te exceeding the lattice temperature. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearSurfaceAcousticWaveInteractionwithTwoDimensionalElectronicSystem.htm -- 6.7 Кб -- 10.07.2002
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437. 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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438. 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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439. 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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440. Abstract
... Nonlinear Regimes of Lesion Formation by HIFU in Tissue-Mimicking Phantom . ... For single lesions, variation of acoustic pressure amplitude was combined either with the same exposure time and different duty cycle or with different exposure times in the continuous wave (cw) regime. For lesion stripes, variation of acoustic pressure amplitude was combined either with the same transducer velocity and different duty cycle or with different transducer velocity in the cw regime. ...
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Ссылки http://acs366.phys.msu.su/isna16/Abstracts/NonlinearRegimesofLesionFormationbyHIFUinTissueMimickingPhantom.htm -- 7.3 Кб -- 10.07.2002
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