A multiple output thermal detection and protection device providing an output signal representative of the temperature sensed by the device, and further providing a positive output signal representative of the sensed temperature reaching a predetermined set point temperature. Two types of welds are used in welding the two halves together, tack welds for holding the two halves together, and stitch welds to complete the welding of the two halves. Random access is possible even if the GOP interval is lengthened. A particular advantage of the virtual computer monitor is intuitive access to enlarged computer output for visually-impaired individuals. a double-stranded RNA which has a sequence of 20 to 30 nucleotides that is identical to a partial sequence of a gene encoding human plasma membrane-associated sialidase and contains the sequence represented by SEQ ID NO: 2, SEQ ID NO: 4, or SEQ ID NO: 8, and the double-stranded RNA inhibits the expression of a gene encoding human plasma membrane-associated sialidase. The rear surfaces and perimeters of each of the seat and back portions is relatively air impermeable while the front surfaces of these members is air permeable.