Results 231 to 240 of about 39,095 (263)

Spatially Programmable Chirality in Cellulose Nanocrystal Films via Rotational Magnetic Flow. [PDF]

ACS Appl Mater Interfaces
Jeon J, Nepal D, McConney ME, Bunning TJ, Tsukruk VV.   +4 more
europepmc   +1 more source

Intrinsic and Extrinsic Circular Dichroism in Linear Arrays of Anisotropic Chiral Nanoparticles. [PDF]

Nano Lett
Chow TH, Jo S, Lu Y, Rivilla I, Mychinko M, Bals S, Mihi A, Liz-Marzán LM.   +7 more
europepmc   +1 more source

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Formation azimuthal anisotropy

The Leading Edge, 1999
Since the first wireline log was acquired in 1927 in France, most of the information recorded in wellbores has been representative of changes in formation properties as a function of depth in or near the borehole. The data are one dimensional, with depth being the only variable.
Bert Chenin, Bob Joyce
openaire   +1 more source

Wide‐azimuth processing for azimuthal anisotropy analysis

SEG Technical Program Expanded Abstracts 2004, 2004
Azimuth-friendly data processing is mandatory in a reliable fracture characterisation workflow. Here, the effects of standard processing methodologies in the presence of azimuthal anisotropy are investigated on synthetic and real data examples. Common techniques for signal processing, statics calculations, imaging and velocity analysis are adapted for ...
Cynthia Gomez, Erika Angerer
openaire   +1 more source

Global Azimuthal Anisotropy in the Transition Zone

Science, 2002
Surface wave dispersion measurements for Love wave overtones carry evidence of azimuthal anisotropy in the transition zone of Earth's mantle (400 to 660 kilometers deep). A Backus-Gilbert inversion of anisotropic phase velocity maps, with resolution kernels mainly sensitive to the transition zone, shows a robust long-wavelength azimuthally anisotropic ...
Trampert, J., van Heijst, H.J.
openaire   +3 more sources

Analysis Methodology for Azimuthal Anisotropy

72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010, 2010
Here is a prescription for the implementation of a data-driven analysis procedure for determining accurate horizontal anisotropic velocity parameters. The high resolution method is simple and fast and can be quickly applied to 3D surveys. Wide and multiple azimuth datasets are making it clear that azimuthal anisotropy is more prevalent than most ...
K. Bishop, A. Osadchuk, M. Stanley
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Azimuth-dependent reflection anisotropy spectroscopy

Journal of Applied Physics, 2003
A detailed explanation of “azimuth dependent reflection anisotropy spectroscopy” (ADRAS) [B. F. Macdonald and R. J. Cole, Appl. Phys. Lett. 80, 3527 (2002)] is presented. Experimental data and simulations are used to illustrate the greater information content of ADRAS compared to the standard reflection anisotropy technique. The application of ADRAS to
B. F. Macdonald, J. S. Law, R. J. Cole
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Variable Azimuthal Anisotropy in Earth's Lowermost Mantle

Science, 2004
A persistent reversal in the expected polarity of the initiation of vertically polarized shear waves that graze the D″ layer (the layer at the boundary between the outer core and the lower mantle of Earth) in some regions starts at the arrival time of horizontally polarized shear waves.
Edward J, Garnero, Valérie, Maupin, Thorne, Lay, Matthew J, Fouch   +3 more
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Detection of azimuthal anisotropy

SEG Technical Program Expanded Abstracts 1989, 1989
The effect of azimuthal anisotropy on conventional P wave data is not a traditional subject for discussion in geophysical conventions. As a considerable number of 3D surveys, most of them involving a wide azimuth range, have been recorded and processed over a number of years, this situation is surprising: whenever accuracy and resolution are required ...
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