Abstract: An air purification and object sterilization apparatus includes an outer housing that defines a volume therein. The volume is divided into a fan compartment and an air purification and sterilization compartment. A fan assembly is configured to draw surrounding air into the air purification and sterilization compartment and then into the fan compartment. A sterilization compartment is located in the air purification and sterilization compartment. A portion of the outer housing is movable to access the sterilization compartment. A lamp assembly includes a light source located in the air purification and sterilization compartment that provides ultraviolet radiation to the sterilization compartment and to the air drawn into the air purification and sterilization compartment by the fan assembly.

Abstract: A system, method and program product for performing density checking of an IC design. The invention establishes an evaluation array for the IC design including an array element for each evaluation window of the IC design. The number of evaluation windows is based on a smallest necessary granularity. A single pass through shape data for the IC design is then conducted to populate each array element with a shape area for a corresponding evaluation window. Density checking is performed by iterating over the evaluation array using a sub-array. The sub-array may have the size of the preferred density design rule window. The invention removes the need for repetitive calculations, and results in a more efficient approach to density checking.