Search Results - "Anisotropy"

Seismic anisotropy - Introduction by Grechka, V., Pšencík, I., Ravve, I., Tsvankin, Ilya

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Seismic Anisotropy—Introduction by Bona, Andrej, Gurevich, Boris, Ball, G., Pervukhina, M.

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Frequency dependence of anisotropy in fluid saturated rocks - Part II: Stress-induced anisotropy case by Collet, O., Gurevich, Boris

“…The stress-induced anisotropy remains elliptical, even in saturated media, for all frequency ranges.…”
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Estimating Azimuthal Stress-induced P-wave Anisotropy from S-wave Anisotropy Measured byVSP by Collet, O., Gurevich, Boris

“…In this study, we present a way to infer azimuthal P-wave anisotropy from measured S-wave anisotropy in areas where anisotropy is known to be caused by the presence of differential stresses acting on the rock. …”
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Phenomenological study of seismic anisotropy in Shales by Pervukhina, Marina, Golodoniuc, P., Dewhurst, D.

“…The observed diversity of Thomsen's anisotropy parameters and anellipticities can be explained with (1) intrinsic anisotropy of wet clay packs, (2) governed by compaction anisotropic distribution of discontinuities and (3) effects of aligned silt inclusions on shale elastic properties.…”
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Signatures of fracture and stress induced anisotropy by Pervukhina, Marina, Gurevich, Boris

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Effect of anisotropy on the bearing capacity and deformation of sand by Al-Rkaby, A., Chegenizadeh, Amin, Nikraz, Hamid

“…Although the effect of anisotropy on soil behavior due to the parallel alignment of particles remains a subject of great interest, studying its effects on load deformation behavior of stabilized sand has yet to be undertaken. …”
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The effect of stress anisotropy on sanding: An experimental study by Younessi, Ahmadreza, Rasouli, Vamegh, Wu, B.

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Magnetic anisotropy in antiferromagnetic hexagonal MnTe by Kriegner, D., Reichlova, H., Grenzer, J., Schmidt, W., Ressouche, E., Godinho, J., Wagner, T., Martin, S.Y., Shick, A.B., Volobuev, V.V., Springholz, G., Holý, V., Wunderlich, J., Jungwirth, T., Výborný, K.

“…Here we report on neutron diffraction, magnetotransport, and magnetometry experiments on semiconducting epitaxial MnTe thin films together with density functional theory (DFT) calculations of the magnetic anisotropies. The easy axes of the magnetic moments within the hexagonal basal plane are determined to be along ⟨1¯100⟩ directions. …”
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Estimating azimuthal stress-induced P-wave anisotropy from S-wave anisotropy using sonic log or vertical seismic profile data by Collet, O., Gurevich, Boris, Duncan, G.

“…Most sedimentary rocks are anisotropic, yet it is often difficult to accurately incorporate anisotropy into seismic workflows because analysis of anisotropy requires knowledge of a number of parameters that are difficult to estimate from standard seismic data. …”
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Optical anisotropy in micromechanically rolled carbon nanotube forest by Mohd Razib, Mohd Asyraf, Rana, Masud, Saleh, Tanveer, Fan, Harrison, Koch, Andrew, Nojeh, Alireza, Takahata, Kenichi, Asan Gani, Abdul Muthalif

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Role of Elastic Anisotropy in the Development of Deformation Microstructures in Zircon by Timms, N., Healy, D., Erickson, T., Nemchin, A., Pearce, M., Cavosie, Aaron

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Compaction trend versus seismic anisotropy in shaly formations by Pervukhina, Marina, Rasolofosaon, P.

“…Shales are notorious for their strong elastic anisotropy, i.e., so-called vertical transverse isotropy. …”
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The variation and visualisation of elastic anisotropy in rock-forming minerals by Healy, D., Timms, Nicholas Erik, Alan Pearce, M.

“…In this paper, we explore the ranges of anisotropy of E, ν, G and β in 86 rock-forming minerals, using previously published data, and show that the range is much wider than commonly assumed. …”
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Nonlinear estimation of Thomsen anisotropy parameters in TI media by Nadri, D., Bona, Andrej, Urosevic, Milovan

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An analytic model for the stress-induced anisotropy of dry rocks by Gurevich, Boris, Pervukhina, M., Makarynska, Dina

“…One of the main causes of azimuthal anisotropy in sedimentary rocks is anisotropy of tectonic stresses in the earth's crust. …”
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Measurement of the anisotropy of cosmic-ray arrival directions with icecube by Abbasi, R., Abdou, Y., Abu-Zayyad, T., Adams, J., Aguilar, J., Ahlers, M., Andeen, K., Auffenberg, J., Bai, X., Baker, M., Barwick, S., Bay, R., Bazo Alba, J., Beattie, K., Beatty, J., Bechet, S., Becker, J., Becker, K., Benabderrahmane, M., BenZvi, S., Berdermann, J., Berghaus, P., Berley, D., Bernardini, E., Bertrand, D., Besson, D., Bissok, M., Blaufuss, E., Boersma, D., Bohm, C., Böser, S., Botner, O., Bradley, L., Braun, J., Buitink, S., Carson, Michael, Chirkin, D., Christy, B., Clem, J., Clevermann, F., Cohen, S., Colnard, C., Cowen, D., D'Agostino, M., Danninger, M., Davis, J., De Clercq, C., Demirörs, L., Depaepe, O., Descamps, F., Desiati, P., De Vries-Uiterweerd, G., DeYoung, T., Díaz-Vélez, J., Dierckxsens, M., Dreyer, J., Dumm, J., Duvoort, M., Ehrlich, R., Eisch, J., Ellsworth, R., Engdegård, O., Euler, S., Evenson, P., Fadiran, O., Fazely, A., Feusels, T., Filimonov, K., Finley, C., Foerster, M., Fox, B., Franckowiak, A., Franke, R., Gaisser, T., Gallagher, J., Geisler, M., Gerhardt, L., Gladstone, L., Glüsenkamp, T., Goldschmidt, A., Goodman, J., Grant, D., Griesel, T., Groß, A., Grullon, S., Gurtner, M., Ha, C., Hallgren, A., Halzen, F., Han, K., Hanson, K., Helbing, K., Herquet, P., Hickford, S., Hill, G.

“…We report the first observation of an anisotropy in the arrival direction of cosmic rays with energies in the multi-TeV region in theSouthern sky using data from the IceCube detector. …”
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Frequency-dependent anisotropy of porous rocks with aligned fractures by Galvin, Robert, Gurevich, Boris

“…These frequency and angle dependencies are concisely expressed through dimensionless velocity anisotropy and attenuation anisotropy parameters. It is found that, although at low frequencies, the medium is close to elliptical (which is to be expected as a dry medium containing a distribution of penny-shaped cracks is known to be close to elliptical); at high frequencies, the coupling between P-wave and SV-wave results in anisotropy due to the non-vanishing excess tangential compliance.…”
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Frequency dependent anisotropy of porous rocks with aligned fractures by Gurevich, Boris, Galvin, Robert, Mueller, T.

“…This allows us to quantify frequency-dependent anisotropy due to the wave-induced flow between pores and fractures and gives a simple recipe for computing phase velocities and attenuation factors of P, SV and SH waves as functions of frequency and angle.…”
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Estimation of stress induced azimuthal anisotropy - AVO modeling by Brajanovski, Miroslav, Gurevich, Boris, Lokajicek, T., Nadri, D., Bona, Andrej, Duncan, G.

“…To overcome this, we developed a method for stress induced azimuthal anisotropy estimation using only cross-dipole logging data. …”
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