Disclosed is a process for controlling extrusion processes by applying dynamic periodic pulses to the process throughout and during the process, analyzing the pulse response data and feeding back the results of the analysis to the process parameters and product properties. Each symbol of the set of symbols is encoded in the form of a two-part code wherein a first part of the code is common for all encoded symbols and a second part of the code encodes the data representing a symbol. Further, the analog orthogonal recursive predistortion efficiently corrects amplitude and phase errors in radio frequency power amplifiers and enhances the PA output capability. The method also includes applying a channel selection method to the remote unit channel data and to base station channel data so as to select a communication channel from among the first portion of communication channels. The night light itself is not being claimed as they are plentiful in the prior art but a projector with a lens that can be turned off and on to soothe the fears of children is claimed. Results obtained using image analysis are correlated to non-spatial information useful for commerce and trade.