elastic waves in solids i free and guided propagation

... published by IOS Press, Amsterdam, and Kluwer Academic Publishers in conjunction with the NATO Scientific Affairs Division Sub-Series I II III IV V Life and Behavioural Sciences Mathematics, ... k-point, with s = ± (not a spin index anymore) and ξ = φ1sˆlz φ2s since ˆl± is vanishing on the Ru sites The corresponding Formation of spin and orbital moments and pressure dependencies 231 eigenvectors ... Kagamiyama, Higashihiroshima 739-8530 Japan A M Gabovich, Institute of Physics, prospekt Nauki 46, 03028 Kiev28, Ukraine A I Voitenko, Institute of Physics, prospekt Nauki 46, 03028 Kiev-28, Ukraine

Ngày tải lên: 21/12/2016, 08:08

... synchrotron radiation [1.105] The other problem which complicates the determination of binding energies and smears spectral lines is that of charging in insulating or semi-insulating samples : ... development in XPS is given in [1.77b] Experimentation with this new technique was difficult and the energy distribution curves obtained were broad, a result in part of the broad x-ray lines and in part ... Berlin Heidelberg New York ISBN 0-387-08685-4 Springer-Verlag New York Heidelberg Berlin Library of Congress Cataloging in Publication Data Main entry under title: Photoemission in solids (Topics

Ngày tải lên: 21/12/2016, 10:49

... quasi-local maxima it is difficult to distinguish their influence on the vibrational characteristics of the crystal The study of this effect is possible in systems in which interatomic interactions ... semi-infinite crystal lattices We consider an infinitely long chain which contains a substitution impurity atom weakly coupled to the matrix atoms (see model in Fig 12) In this system quasi-local ... phonons is clearly manifested in the case when not only the interaction of impurity atoms with the host lattice is weakened, but also the interaction between substitution impurities in the matrix

Ngày tải lên: 19/06/2014, 12:20

... scatterings, we must consider the energy density of a pulse which is injected into the granular 142 Waves in Fluids and Solids Multiple Scattering of Elastic Waves in Granular Media: Theory and ... frequency. The integer index n consists of one discrete branch index j, with the discrete contribution of k becoming continuous in the limit when A → ∞. In the quasi-two-dimensional approximation we ... (38) in the diffusion limit and solve it to study the diffusive behavior of elastic wave propagation in granular media. Integrating Eq. (38) over ˆ k and performing some rearrangements we obtain

Ngày tải lên: 19/06/2014, 12:20

... Conclusions In this chapter after briefly introducing acoustic and elastic waves, their wave equations and propagation, a detailed presentation on interface waves and their properties is given. ... Since the matrix Σ is ill conditioned in the numerical solution of this inverse problem a technique called regularization is used to deal with the ill conditioning (Tikhonov & Arsenin, ... (i.e., 1/r 2 ), as would be true of waves from a point source located in a medium of infinite extent. Cylindrical spreading loss indicates that, once an interface wave is excited, it is likely

Ngày tải lên: 19/06/2014, 12:20

... possible to observe various kinds of non-elastic scattering in medium, e.g., the Raman scattering, the Brillouin scattering, the Bragg scattering etc In the case of Raman scattering the oscillatory ... final processing In Fig 19 the reflectance spectra of the globular PTC with various globule diameter and containing the atmospheric air (curve 1 in Fig 19 (a) – (c)), and water (curve 2 in Fig ... vector in SiO2 (i = 1) and in the air (i = 2) In Fig 12 the dispersion dependence ω(k) for the incident (along the direction (111)) electromagnetic wave in the globular PTC, whose pores filled with

Ngày tải lên: 19/06/2014, 12:20

... ability to minimize this effect In this section, following the analysis methods presented in Vichnevetsky (1979), Dablain (1986), and Yang et al (2006), we investigate the dispersion relation ... discrete finite difference equation, is the major artifact when we use finite difference schemes to model acoustic and elastic wave- Trang 8fields, further resulting in the low computational efficiency ... method is convergent 4 Numerical dispersion and efficiency As we all know, the numerical dispersion or grid dispersion, which is caused by approximating the continuous wave equation by a discrete

Ngày tải lên: 19/06/2014, 12:20

... electrodes surface implying the supplementary restrictions in itsinitial position and velocity One could say that, within the stability domains, a potential Trang 7barrier arises preventing the stored ... possibility to manipulate the stored microparticles by using an acoustic wave.That means both controlling their position in space and performing a further selection of thestored microparticles It ... Tsinghua Univ (Sci & Tech.), Vol 42, No 8, pp 1128-1131 (in Chinese), ISSN 1000-0054 Yang, D H., Liu, E., Zhang, Z J & Teng, J W 2002 Finite-difference modeling in two-dimensional anisotropic

Ngày tải lên: 19/06/2014, 12:20

... soft medium is in general assumed viscoelastic [6] and the existence of viscosity inevitably causes ambiguity in differentiating the localization effect from the acoustic absorption which might ... excluded in Figs. 3.1(a-c) which may cause ambiguity in identifying the phenomenon of localization. It is thus of much more practical significance to investigate the localization properties in the ... transition in acoustic localization in bubbly soft media In this section, we focus on the localization in bubbly soft medium with the effect of viscosity taken into account, by inspecting the oscillation

Ngày tải lên: 19/06/2014, 12:20

... scattering initiated in (1), dealing with analytical investigations of the scattering problem by a circular disc The main results for point-source scattering bysimple homogeneous canonical shapes ... reported in (16) and (17) Further chemical, biologicaland physical applications motivating the investigations of interior and exterior scatteringproblems by layered spheres are discussed in (18) Additionally, ... exploiting thedifferent cross-section characteristics of interior and exterior excitation, (ii) determine themass densities of the sphere’s layers for given geometrical characteristics by combining

Ngày tải lên: 19/06/2014, 12:20

... 1Explicit secular equations of Rayleigh waves in elastic media underthe influence of gravity and initial stress Pham Chi Vinh Faculty of Mathematics, Mechanics and Informatics, Hanoi University ... taken in the present paper 6 Conclusions In this paper the propagation of Rayleigh waves in homogeneous orthotropic elastic media under the influence of gravity and initial stress is investigated ... Introduction Elastic surface waves in isotropic elastic solids, discovered by Rayleigh[1]more than 120 years ago, have been studied extensively and exploited in a wide range of applications in

Ngày tải lên: 12/12/2017, 08:17

... instabilities and ellipticity in fiber-reinforced compressible nonlinearly elastic solids Int J Eng Sci., 43, 697–706 Merodio, J & Ogden, R W (2005c) Remarks on instabilities and ellipticity for a fiber ... Hence, m gives the fibre direction in the deformed configuration It is clear that principal directions of stress and strain not coincide, in general In the biomechanics literature several strain energy ... eliminate spurious roots arising in the explicit secular equation The explicit secular equation for non-principal Rayleigh waves in incompressible, transversely isotropic, pre-stressed elastic

Ngày tải lên: 16/12/2017, 07:04

... classified as invasive adenocarcinoma and divided further into acinar (APA), papillary (PPA), solid (SPA), mucinous adenocarcinoma (MA), and micropapillary (MPA) based on their predominant invasive ... In accordance with this IASLC/ATS/ERS classification system [24], adenocarcinoma in situ (AIS) cases were selected using haematoxylin and eosin (H&E)-stained sections according to the following ... a lesion, including its differentiation and invasiveness or patients’ recurrence/prognosis In the current study, using an original, specific rabbit polyclonal PRDX4 antibody generated against

Ngày tải lên: 15/01/2020, 02:23

... hybridize MDCK Eco RI 7.1 kb Fragment Probe HindIII XbaI BamHI BamHI BamHI AvrII SpeI EcoRI BamHI SacI BamHI BamHI XbaI XbaI BamHI SphI SpeI EcoRI HindIII XbaI BamHI SacI BamHI BamHI AvrII A B C M 1 ... vaccine produc-tion The ability to quickly increase the scale of influenza vaccine production is especially critical in response to an incipient pandemic influenza outbreak, where global vac-cination ... Determination of the MDCK RNA pol I promoter transcrip-tion initiatranscrip-tion site by primer extension analysis Figure 3 Determination of the MDCK RNA pol I promoter transcription initiation site

Ngày tải lên: 18/06/2014, 18:20

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Ngày tải lên: 13/05/2014, 09:18

... fluid media and elastic perturbations in heterogeneous media. Acoustic wave propagation in layered media is very important topic for many practical applications including medicine, optics and ... 1 Norway 2 Ukraine 1. Introduction Acoustic wave propagation in layered media is very important topic for many practical applications including medicine, optics and applied geophysics. The key ... input is AVO intercept and gradient. The method is based upon thin layer reflectivity modeling. It is shown that random variability in thickness and seismic properties of the thin sand and shale...

Ngày tải lên: 19/06/2014, 12:20

... Media - From Theory to Seismic Applications 25  1 2 2 2 2 2 Im cos sin sin sin sin cos Im sin Im 1 1sin 1 sin sin sin sin cos Im sin sin 1 i D i D D a MiM e t MiaM a C M bM M Ce rtb MiaM C        ... will be changed. In Figure 2, we show using the points i M   0, 5i   with the initial position 0 M defined by 0p  and the following positions crossing the boundaries for the regions ... Applications 35 triplication region is degenerated to a single point, it is called incipient triplication. At that point we have 0q    and 0q    . For the incipient horizontal on-axis...

Ngày tải lên: 19/06/2014, 12:20

... scattering in finely layered sediments is of importance for stratigraphic interpretation, matching of well log-data with seismic data and seismic modelling. This problem was first studied in the ... Another interesting variant of the asymptotic analysis is developed by Simonetti (2003), who studied behavior of propagation modes of Lamb and SH waves in a single-layered (infinite) plate with different ... liner combination of them. This allows us to construct a vanishing frequency wave arbitrary (indefinitely) polarized in the sagittal plane. Summarizing, we arrive at Soliton-Like Lamb Waves...

Ngày tải lên: 19/06/2014, 12:20

... corresponding limiting speed is independent of physical and geometrical properties of other layers. It can be said that the limiting wave is insensitive to the layers of finite thickness in a contact ... Anisotropic elasticity: theory and applications. Oxford University Press, New York, 1996. Ting T.C.T. A modified Lekhnitskii formalism á la Stroh for anisotropic elasticity and classifications ... D.M. Classifications of surface waves in anisotropic elastic materials. Wave Motion 26 (1997) 207 – 218. Tolstoy I. and Usdin E. Dispersive properties of stratified elastic and liquid media: a...

Ngày tải lên: 19/06/2014, 12:20

... atomic displacements) and in the contribution of individual atoms to the additive thermodynamic and kinetic quantities. The most important elementary excitations appearing in crystalline and disordered ... qualitative modification in the nature of acoustic phonons and does not change their classification. Let in the crystal randomly introduce heavy isotopic substitution impurities or impurities ... Alexander Kotlar 2 and Kirill Kravchenko 2 1 Institute of Physics, Faculty of Science P. J. Šafárik University, Košice 2 B .I. Verkin Institute for Low Temperature Physics and Engineering NASU, Kharkov...

Ngày tải lên: 19/06/2014, 12:20