But not everyone viewing the film has been hit by the 'Avatar Blues', as a small but vocal group have alleged it contains racist themes - the white hero once again saving the primitive natives.

Study carefully its origin, can roughly trace back to primitive human era. But the concept of informal group is put forward by modern management educational circles correspondent to formal group.

Deriving the smallest primitive unit cells, necessary to describe the translational periodicity of a crystal structure, is the first step toward choosing the correct space group.