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  • 1
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    Propagation of elastic waves in a cylindrical bore in a liquid-saturated porous solid (1990)
    In:  Geophys. J. Int., Luxembourg, Deutsche Geophys. Gesellschaft, vol. 103, no. 2, pp. 47-54, pp. L14312, (ISSN: 1340-4202)
    Details
    Publication Date: 1990
    Keywords: Waves ; Rayleigh waves ; Borehole geophys. ; Wave propagation ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    3-D wave propagation in a general anisotropic poroelastic medium: reflection and refraction at an interface with fluid (2004)
    In:  Geophys. J. Int., Luxembourg, Deutsche Geophys. Gesellschaft, vol. 157, no. 2, pp. 947-958, pp. L14312, (ISSN: 1340-4202)
    Details
    Publication Date: 2004
    Keywords: Three dimensional ; Wave propagation ; Anisotropy ; Reflectivity ; energy ; travel, ; general ; anisotropy, ; poroelastic ; solids ; Refraction seismics ; Reflection seismics ; Seismics (controlled source seismology) ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Surface waves in a general anisotropic poroelastic solid half-space (2004)
    In:  Geophys. J. Int., Luxembourg, Deutsche Geophys. Gesellschaft, vol. 159, no. 2, pp. 703-710, pp. L14312, (ISSN: 1340-4202)
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    Publication Date: 2004
    Keywords: Surface waves ; Anisotropy ; Waves ; Fluids ; Modelling ; porous ; secular ; equation ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    Effect of initial stress on the propagation of plane waves in a general anisotropic poroelastic medium (2005)
    In:  J. Geophys. Res., Luxembourg, Deutsche Geophys. Gesellschaft, vol. 110, no. B11, pp. 703-710, pp. B11307, (ISSN: 1340-4202)
    Details
    Publication Date: 2005
    Keywords: Wave propagation ; Waves ; Modelling ; Elasticity ; porosity ; Fluids ; Anisotropy ; JGR ; anisotropic ; poroelastic ; (APE) ; solid ; Biot's ; theory ; phase ; velocity ; attenuation ; 3285 ; Mathematical ; Geophysics: ; Wave ; propagation ; (0689, ; 2487, ; 4275, ; 4455, ; 6934) ; 5102 ; Physical ; Properties ; of ; Rocks: ; Acoustic ; properties ; 5144 ; Wave ; attenuation ; 7203 ; Seismology: ; Body ; waves ; 7260 ; Theory
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Reflection and transmission of elastic waves at a loosely bonded interface between an elastic solid and liquid-saturated porous solid (1991)
    In:  Geophys. J. Int., Veldhoven, Kluwer, vol. 105, no. 3, pp. 601-617, pp. L01308, (ISSN: 1340-4202)
    Details
    Publication Date: 1991
    Keywords: Seismics (controlled source seismology) ; Reflection seismics ; Refraction seismics ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    Rayleigh waves in a partially saturated poroelastic solid (2012)
    Oxford University Press
    Details
    Publication Date: 2012-04-15
    Description: SUMMARY Propagation of Rayleigh waves is studied in a porous medium, which is not fully saturated. The porous medium is assumed to be a continuum consisting of a solid skeletal with connected void space occupied by a mixture of two immiscible viscous fluids. This model also represents a case when liquid fills only a part of the pore space and gas bubbles span the remaining void space. In this isotropic medium, potential functions identify the existence of three dilatational waves coupled with a shear wave. For propagation of plane harmonic waves restricted to a plane, these potentials decay with depth from the plane boundary of the medium. Rayleigh wave in this dissipative medium is an inhomogeneous wave which decays with depth and ensures the vanishing of stresses at the plane boundary of the medium. The existence and propagation of such a wave is represented by a secular equation, which happens to be complex and irrational. This irrational equation is resolved into a polynomial form so as to find its exact roots and hence to analyse the existence and propagation of Rayleigh wave. The velocity and amplitude of Rayleigh wave are used further to calculate the averaged polarization of aggregate displacement in the medium. Existence of Rayleigh wave in a particular porous medium depends on the values of various parameters involved in secular equation. Hence, a numerical example is studied to find pertinent saturation levels for which Rayleigh waves exist in the considered numerical model of the porous medium. Variations in valid saturation range, velocity, quality factor and polarization of Rayleigh waves are studied with the changes in wave frequency, capillary pressure, liquid viscosity and frame anelasticity.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 7
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    Rayleigh waves in a partially saturated poroelastic solid (2012)
    Oxford University Press
    Details
    Publication Date: 2012-03-28
    Description: SUMMARY Propagation of Rayleigh waves is studied in a porous medium, which is not fully saturated. The porous medium is assumed to be a continuum consisting of a solid skeletal with connected void space occupied by a mixture of two immiscible viscous fluids. This model also represents a case when liquid fills only a part of the pore space and gas bubbles span the remaining void space. In this isotropic medium, potential functions identify the existence of three dilatational waves coupled with a shear wave. For propagation of plane harmonic waves restricted to a plane, these potentials decay with depth from the plane boundary of the medium. Rayleigh wave in this dissipative medium is an inhomogeneous wave which decays with depth and ensures the vanishing of stresses at the plane boundary of the medium. The existence and propagation of such a wave is represented by a secular equation, which happens to be complex and irrational. This irrational equation is resolved into a polynomial form so as to find its exact roots and hence to analyse the existence and propagation of Rayleigh wave. The velocity and amplitude of Rayleigh wave are used further to calculate the averaged polarization of aggregate displacement in the medium. Existence of Rayleigh wave in a particular porous medium depends on the values of various parameters involved in secular equation. Hence, a numerical example is studied to find pertinent saturation levels for which Rayleigh waves exist in the considered numerical model of the porous medium. Variations in valid saturation range, velocity, quality factor and polarization of Rayleigh waves are studied with the changes in wave frequency, capillary pressure, liquid viscosity and frame anelasticity.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 8
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    Potential regulatory function of human dendritic cells expressing indoleamine 2,3-dioxygenase (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-09-14
    Description: Antigen-presenting cells (APCs) can induce tolerance or immunity. We describe a subset of human APCs that express indoleamine 2,3-dioxygenase (IDO) and inhibit T cell proliferation in vitro. IDO-positive APCs constituted a discrete subset identified by coexpression of the cell-surface markers CD123 and CCR6. In the dendritic cell (DC) lineage, IDO-mediated suppressor activity was present in fully mature as well as immature CD123+ DCs. IDO+ DCs could also be readily detected in vivo, which suggests that these cells may represent a regulatory subset of APCs in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Munn, David H -- Sharma, Madhav D -- Lee, Jeffrey R -- Jhaver, Kanchan G -- Johnson, Theodore S -- Keskin, Derin B -- Marshall, Brendan -- Chandler, Phillip -- Antonia, Scott J -- Burgess, Russell -- Slingluff, Craig L Jr -- Mellor, Andrew L -- AI44219/AI/NIAID NIH HHS/ -- AI44759/AI/NIAID NIH HHS/ -- HL60137/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2002 Sep 13;297(5588):1867-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Molecular Medicine and Genetics, Medical College of Georgia, Augusta, GA 30912, USA. dmunn@mail.mcg.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12228717" target="_blank"〉PubMed〈/a〉
    Keywords: Antigen-Presenting Cells/enzymology/immunology ; Antigens, CD/analysis ; Cell Adhesion ; Cell Lineage ; Cells, Cultured ; Dendritic Cells/*enzymology/*immunology ; Down-Regulation ; Enzyme Inhibitors/pharmacology ; Humans ; Indoleamine-Pyrrole 2,3,-Dioxygenase ; Interferon-gamma/pharmacology ; Interleukin-10/pharmacology ; Interleukin-3 Receptor alpha Subunit ; Lymphocyte Activation ; Lymphocyte Culture Test, Mixed ; Lymphoid Tissue/cytology/enzymology ; Macrophages/enzymology ; Receptors, CCR6 ; Receptors, Chemokine/analysis ; Receptors, Interleukin-3/analysis ; T-Lymphocytes/*immunology ; Tryptophan/*analogs & derivatives/pharmacology ; Tryptophan Oxygenase/antagonists & inhibitors/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
    Electronic Resource
    Electronic Resource
    Surface wave propagation in a transversely isotropic elastic layer overlying a liquid saturated porous solid half-space and lying under the uniform layer of liquid (1990)
    Springer
    Pure and applied geophysics 133 (1990), S. 523-539 
    Details
    ISSN: 1420-9136
    Keywords: Surface waves ; transversely isotropic ; liquid saturated porous solid ; dispersion ; Rayleigh type waves ; nondissipative porous media ; frequency equation ; phase velocity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Dispersion of Rayleigh-type surface wave is studied in a homogeneous transversely isotropic elastic layer overlying a nondissipative liquid-saturated porous solid half-space and lying under a uniform layer of homogeneous liquid. The frequency equation in the form of ninth-order determinant is obtained. Special cases have been deduced by reducing the depth of the layers to zero and by changing the transverse isotropic layer to an isotropic layer. Dispersion curves for the phase velocity have been plotted for a particular model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00878003
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  • 10
    Electronic Resource
    Electronic Resource
    Reflection and transmission ofSH waves in an initially stressed medium consisting of a sandy layer lying over a fluid-saturated porous solid (1993)
    Springer
    Pure and applied geophysics 140 (1993), S. 613-628 
    Details
    ISSN: 1420-9136
    Keywords: Propagation ; poroelastic ; viscosity ; anelasticity, dissipation, interstitial fluid, energy, parfition ; initial stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Biot's theory is employed to study the reflection and transmission ofSH waves in a sandy layer lying over a fluid-saturated porous solid half-space. The entire medium is considered under constant initial stress. Effects of sandiness, initial stress, anelasticity and viscosity of the interstitial fluid on the partitioning of energy are studied. In the presence of initial stress the incident wave starts attenuating when incider beyond a certain angle (depending upon the amount of initial stress), even if the medium is perfectly clastic. Anelasticity of the solid layer results in the dissipation of energy during transmission. The direction of attenuation vector of incident wave affects the dissipation energy to a large extent. Effect on partitioning of energy reverse at incidence after the critical angle. A complete account of energy returmed back to the underlying half-space and that which is dissipated in the overlying layer has been discussed analytically as well as numerically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876579
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