Surface textures can be isotropic or anisotropic. Such mesophases include isotropic, anisotropic, nematic and cholesteric. Polarized irradiation will make an azo-material anisotropic and therefore optically birefringent and dichroic. Thus by letting formula 21 the anisotropic diffusion equations are obtained. Ferrimagnetic materials have high resistivity and have anisotropic properties. The soft tissues are also viscoelastic, incompressible and usually anisotropic. Diamond is an optically anisotropic crystal that is transparent to opaque. To model permeability in anisotropic media, a permeability tensor is needed. Directed percolation can be also regarded as anisotropic percolation. Examples are the median, bilateral, guided, and anisotropic diffusion filters. One of the most impressive of techniques exploits anisotropic optical characteristics of conjugated polymers. Wood is a heterogeneous, hygroscopic, cellular and anisotropic material. We just want to know which direction lines turn up the maximum anisotropic diffusion measures. Birefringence is observed in anisotropic elastic materials. For anisotropic media, the stiffness tensor formula 91 is more complicated.