Abstract: An article for protecting a wearer's eyes from air-entrained particulate matter in close proximity to the eyes includes a frame, a conduit and a connector. The frame is to be placed on the head at least partially encircling the eyes of the wearer. The conduit is supported by the frame and includes a discharge outlet therein for discharging a gas under pressure into the area forward of the wearer's eyes to form a zone of relatively high pressure and propel particulate matter away from the eyes. The connector is carried by the conduit for connecting the conduit to a pressurized source of gas. An apparatus for protecting an aperture from air-entrained particulate matter includes a frame, a conduit, and a connector.

Abstract: A method and system for constructing polygon layout. From a schematic, there is a data file describing a series-parallel transistor structure having a plurality of gate regions and a plurality of source/drain regions. A representation list is created (either by a computer user or by a computer analyzing a netlist). This representation list includes a plurality of region data for the plurality of gate regions and the plurality of source/drain regions. Polygon layout is built for the series-parallel transistor structure from this representation list.