Materials with anisotropic material parameters can be utilized to fabricate many fascinating devices, such as hyperlenses, metasolids, and one-way waveguides. In this study, we analyze the effects of geometric anisotropy on a two-dimensional metamaterial composed of a rectangular array of elliptic cylinders and derive an effective medium theory for such a metamaterial. We find that it is possib...

In HeLa cells cultured in a medium containing 142 mequiv./l. sodium ions only the mitotic forms are birefringent (anisotropic index, 27/1000). In a culture medium containing 155-160 mequiv./l. sodium ions, large numbers of nuclear forms reminiscent of the prophase were found. In such a medium the anisotropic index was 86/1000. At low sodium ion concentration (90-110 mequiv./l.) these anomalous,...

this work presents a numerical study to investigate the heat transfer characteristics of a 2-d rectangular composite porous radiant burner (cprb). in the construction of porous burner, the porous layer is considered to be of composite type consisting of upstream and downstream layers with equal thickness but with different physical and radiative properties. in the present work, a two dimensiona...

The emerging instability of a forced throughflow in fluid saturated horizontal porous duct rectangular cross section is investigated. heated from below by assuming the boundaries to be at different temperatures. Both and vertical are impermeable basic flow parallel such boundaries. medium anisotropic with permeabilities directions. effect anisotropy on onset buoyancy-driven modal absolute analy...

The scattering fields from an anisotropic uniaxial-coated conducting sphere by a plane wave are derived. The electromagnetic fields in uniaxial anisotropic medium and free space can be expressed in terms of spherical vector wave functions in uniaxial anisotropic media and isotropic medium. Applying the boundary condition in the interface between the uniaxial anisotropic medium and free space, t...

Consider the anisotropic porous medium equation, ut = n ∑ i=1 (um)xixi , where mi > 0, (i = 1, 2, · · · , n) satisfying min 1≤i≤n {mi} ≤ 1, n ∑ i=1 mi > n−2, and max 1≤i≤n {mi} ≤ 1 n (2+ n ∑ i=1 mi). Assuming that the initial data belong only to L(R), we establish the existence and uniqueness of the solution for the Cauchy problem in the space, C([0,∞), L(R))∩C(R× (0,∞)) ∩ L(R × [ε,∞)), where ε...

Current diagnosis of bone loss and osteoporosis is based on the measurement of the Bone Mineral Density (BMD) or the apparent mass density. Unfortunately, in most clinical ultrasound densitometers: 1) measurements are often performed in a single anatomical direction, 2) only the first wave arriving to the ultrasound probe is characterized, and 3) the analysis of bone status is based on empirica...

In this paper the effect of magnetic field on linear and non-linear thermal instability in an anisotropic porous medium saturated with viscoelastic fluid is considered. Normal mode technique is used to investigate the linear stability analysis, while non-linear stability has been done using minimal representation of truncated Fourier series involving only two terms. Extended Darcy model, which ...