Abstract: Disclosed herein is a wind turbine that includes a cylindrical impeller having a plurality of blades located about a radius of the cylindrical impeller, the blades having a span that is less than or equal to 20 percent of the radius. The wind turbine further includes an inlet duct that channels an airflow to the impeller and an outlet duct that channels the airflow away from the impeller substantially perpendicular to the inlet airflow in a plane that is perpendicular to a central axis of the impeller. Moreover, the inlet duct, the outlet duct and the impeller induce a recirculation zone in a center portion of the impeller that is located within the blades of the impeller.

Abstract: A cover for a tight top mattress includes an upper panel, a lower panel and a border panel. A zipper connects the border panel to either the upper or lower panel. At least one of the upper of lower panels is a quilted foam and fabric assembly which is dimensioned and configured as a pillow top. The upper, lower and border panels define an enclosure for closely fitting and receiving the mattress.