Pol Grasland-Mongrain edited Results.tex  over 8 years ago

Commit id: 737a0d947d18b28d158869efdbe17c4602e84fc4

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Figure \ref{Comparaison}-(C-D) illustrates Z-component map 8 milliseconds after excitation, when excited with a 100\% and 50\% amplitude in the coil respectively. Average displacement in the region of interest is equal to 3.1 $\mu$m in the first case and 1.2 $\mu$m in the second case: shear wave amplitude is roughly divided by two when excitation amplitude is divided by two.  Figure \ref{Comparaison}-(E-F) illustrates Z-component map 8 milliseconds after excitation, in a 5 S.m$^{-1}$ 5\% salt  medium and a 1.8 S.m$^{-1}$ 2\%  medium respectively (note that (E) and (A) are identical). Average displacement in the region of interest is equal to 3.3 $\mu$m in the first case and 1.4 $\mu$m in the second case: when electrical conductivity of the medium decreases, shear wave amplitude decreases roughly by a same factor. Figure \ref{Comparaison}-(G-H) illustrates Z-component map 7 milliseconds after excitation, when excited with a 100\% and a -100\% amplitude in the coil respectively. Average displacement in the region of interest is equal to 2.6 $\mu$m in the first case and -2.8 $\mu$m in the second case: displacement amplitude is inverted when excitation is inverted.