A class of Preparata-like group codes is considered. It was suggested by Baker, van Lint and Wilson and re-stated in a different form by Ericson. We show that all such codes are inside the Hamming code providing its partition into the cosets of the Preparata-like codes. This partition induces 2-resolvable Steiner quadruple systems.

As machine design in the cotton ginning industry advances, the trend is towards systems that allow for dynamic adjustment of cleaning capabilities. There is however, a lack of real-time sensors suitable for detection of the trash content that would allow for determination of the trash content before the machine performs the cleaning. Current state of the art sensors typically sense the product’...