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Nuclear magnetic resonance measurements in hydrate-bearing sandstone samples from the Shenhu area, South China Sea were used to study the effect of gas hydrates on the sandstone permeability. The hydrate-bearing samples contain pore-filling hydrates. The data show that the pore-filling hydrates greatly affect the formation permeability while depending on many factors that also bear on permeability;...
We modeled and studied the permeability of methane hydrate bearing formations as a function of methane hydrate concentration by artificially varying the T2 distribution as well as using a tube-sphere model. We varied the proportion of irreducible and movable water as well as the total porosity associated with the T2 distribution and found the normalized permeability as a function of methane hydrate...
We demonstrate numerically and experimentally a magnetically tunable negative permeability metamaterial consisting of an array of broadside coupled split ring resonators infiltrated with liquid crystals (LCs). We stress by a comparative analysis of the LC influence on the resonant frequency under isotropic and anisotropic conditions, the specificities of the tunability of the electromagnetic properties...
The electromagnetic properties of High-k BST rods are investigated numerically and experimentally with the goal to fabricate a transparency cloak. With respect to the metal Split Ring Resonator cloak reported in the literature the full dielectric approach, based on Mie resonances is simpler to fabricate with comparable performances in terms of Radar Cross Section, a welcome feature in the prospect...
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