A method for controlling power consumption of an iterative decoder based on one or more criteria is described. Highly regioselective unsymmetrical amino uracils can be obtained using these methods which is a particular advantage over other existing methods. The control system is operatively coupled to the sensor, the user input device, and the window, and is adapted to receive the light intensity and user input value and to adjust a transmission level of the variable transmissivity portion of the window based on at least one of the light intensity and the user input value. A method for making a reliable heat sink includes a preparing step, a punching step and a flattening step. The interface hook is folded back from the top end toward the second surface and the bottom end of the main portion and is configured to receive a portion of a shelf assembly to couple the sign holder to the shelf assembly.