Signaling a user of a computer system that a particular event has occurred. min by thermogravimetry, said composite particle exhibits two stages of weight loss in the range of 30 to 1000\xb0 C. The computer network simulates a single computer. The lamp shade is made of tempered glass and wedged in the housing chamber, and has a jutting lens in the center and an annular end extended outwards from the perimeter of the lens. 5 weight percent, CoO up to 50 PPM, Se up to 15 PPM, Cr2O3 up to 500 PPM, CuO up to 0. A flexible printed circuit board connector is configured to connect electrical power and signals to each of the ICs.