Another function of the jig is to steady the piece of wood being cut to prevent excess cutting or inaccurate cuts. The size, shape, and function of a woodworking jig will vary significantly according to how it is being used and with what tool it is being used.
WMAP image of the (extremely tiny) anisotropies in the cosmic background radiation. Anisotropy /ËÃ¦naÉªËsÉtrÉpi/ is the property of being directionally dependent, which implies different properties in different directions, as opposed to isotropy.
Orthotropic materials are a subset of anisotropic materials; their properties depend on the direction in which they are measured. Orthotropic materials have three planes/axes of symmetry. An isotropic material, in contrast, has the same properties in every direction. It can be proved that a material having two planes of symmetry must have a third one. Isotropic materials have an infinite number of planes of symmetry. Transversely isotropic materials are special orthotropic materials that have one axis of symmetry (any other pair of axes that are perpendicular to the main one and orthogonal among themselves are also axes of symmetry).