1. However, wood is an anisotropic material with respect to heat flow. 2. Rotating an anisotropic material results in a variation of its elasticity tensor. 3. However, in anisotropic materials , this relationship does not strictly hold. 4. Anisotropic materials can be tailored to the forces an object is expected to experience.5. In an anisotropic material , the relative permittivity may be a tensor, causing birefringence. 6. This can be further generalized to bi-anisotropic materials by transposing the full 6? susceptibility tensor. 7. Both, he underscores, require strong background in non-linear anisotropic materials and dynamic impacts. 8. This complexity may be required for general anisotropic materials , but for many common materials it can be simplified. 9. With the recognition that the polarizabilities may be tensors, the DDA can readily be applied to anisotropic materials . 10. Orthotropic materials are a subset of anisotropic materials ; their properties depend on the direction in which they are measured.