Asthma is an inflammatory disease of the airways in the lungs and bronchial tubes, the lower airway, that impairs breathing, causes wheezing, coughing and excess mucus and phlegm production. The assembly also has a tilt adjustable housing that holds a set of hair rollers and encloses an electrical means for heating the rollers. The gradient-calculating summation unit calculates a set of gradient brightness levels according to a portion of the input pixels along a set of directions respectively. The lever assemblies engage guides adapted, upon controlled displacement from the front rearwards of the lever assemblies, to guide their tilting movement upwards and, upon reverse displacement, to guide their tilting movement downwards. In another method, a hydrogen peroxide containing solution is applied to a semiconductor substrate for a time sufficient to grow a silicon dioxide layer having a thickness of greater than eight angstroms and then applying an etching solution to etch the silicon dioxide layer down to a thickness of less than eight angstroms. In the event that matching criteria are not met based at least in part on the comparison, a second action that is different from the first action is performed.