An expandable polystyrene bead production method, which is a two-step process, is disclosed. The barrier coatings comprise nitride layer exposed to the discharge medium formed from one or more of aluminum, boron, scandium, yttrium, or the lanthanides. The first group of window coefficients is used for windowing later time-domain samples and the second group of window coefficients is used for windowing an earlier time-domain samples. This virtual machine software is extensible to take advantage of other software andor hardware at the device.