Provided is a thioether-functional, oligomeric polythiol having pendant hydroxyl functional groups, prepared by reacting together: a compound having at least two thiol functional groups; and a hydroxyl functional compound having triple bond functionality. A first source streams delivery of streamed media packets of the media file in sequential packet number order to the media player, while a second source provides segmented delivery of segmented media packets of the media file in random order to the media player. Channel estimates are derived by correlating the samples with at least one pilot sequence. A reflective surface that has the highest refractive power among the plurality of reflective surfaces has a symmetrical plane. Second channel material is between the first channel material and the source region, and directly contacts the source region. The prism sheet acts as a condensing member for condensing the light diffused axially of each fluorescent lamp, in directions perpendicular to the axis of the fluorescent lamp.