An electro-optic device includes a semiconducting layer in which is formed a waveguide, a modulator formed across the waveguide comprising a p-doped region to one side and an n-doped region to the other side of the waveguide, wherein at least one of the doped regions extends from the base of a recess formed in the semiconducting layer. The compositions can include a luminescent material, such as quantum dots and a reflective material, such as barium sulfate, both suspended in a matrix material. Electronic components are fabricated on the same substrate material, allowing sensors and controlling circuitry to be incorporated in the same device. The first screener has an inlet for receiving the bulk material containing large-sized, medium-sized, and small-sized particles. Information signals, based in part upon any recognized utterances identified by the speech recognition analysis, are subsequently provided to the subscriber unit. The second sleeve is coactively mounted on the second rotating tube.