Esteramine compositions and their derivatives are disclosed. Additionally, a portion of each electrode may be inserted into the space and an end of each electrode may be connected to the power supply such that the sulfur is excited by an electric discharge thereby emitting light. Accordingly, the user will know whether or not to trust the password entry interface, such as a password dialog box displayed on a display device, prior to entering password information. This photomultiplier design obviates the needs for through-substrate etching, and mechanical assembly of separate layers. The target region is a portion of a second cyclic prefix in the second path signal which overlaps with a first cyclic prefix in the first path signal.