An apparatus and a system is provided that may be utilized to provide stability to air flow through a hood scoop. In the method, the dual gate electrode may have different widths and is formed using a damascene process. The plurality of marks are a set of marks at least including two marks disposed on one side of the overlapping part and two marks disposed on another side of the overlapping part. If used together, the reading meter system and emotional response tool advantageously may both receive, and perform processing on, eye date generated from a common eye tracking device. A current mirror mirrors a scaled current proportional to ISENSE to be conducted through the resistor, the scaled current being scaled so as to cause the voltage generated across the resistor to exceed the predetermined value when ILOAD exceeds a predetermined value.