Plane-wave representation generation

There are a number of factors which contribute to the lack of consistency among current DFT programs. For example, many different basis representations of the KS orbitals are employed, including plane waves, Slater-type orbitals, numerically tabulated atomic orbitals, numerical functions generated from muffin-tin potentials, and delta functions. Gaussian basis functions, ubiquitous in the ab initio realm, were introduced into KS calculations in 1974 by Sambe and... 

Transport of Droplets by Acoustics, Figure 1 Schematic representation of launching of plane waves in a fluid by small-amplitude traveling flexural waves on a wall. The flexural wave speed Cw must be supersonic with respect to the speed of sound cq in the fluid for such plane waves to be generated. If the flexural wave is subsonic, the disturbance dies out exponentially with y... 

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