Multiple UV sterilizers may be connected in series in order to increase the microorganism kill rate. The present invention is also directed to methods of making and using the compositions of the present invention. The hinge has an arced surface and a rotating shaft. At time t4 when some period of time has passed after time t3, output of the valid row address stops and the signal ras# enters the negative state. The receptacle includes an antenna which detects an insertion of library item having a radio frequency identification device mounted thereon.