A heating element of a fluid ejection device, the heating element including a ring-type body, an inner edge of the body, and an outer edge of the body, wherein at least one of the inner edge and the outer edge defines an undulated surface contour. The decoder buffer level limits are specified in terms of a maximum number of encoded frames. Plasma catalysts, and methods and apparatus for igniting, modulating, and sustaining a joining plasma, are provided. Input can also be obtained from internet websites and from health care providers, such as doctors. A lens and a diffuser are mounted to the housing and are spaced from the light sources for focusing and blurring the projected light to define an image projected upon the object. In use, a user lies substantially prone and grasps the handle, places one heel against each of the base surfaces, and draws the base toward hisher trunk using heel pressure, thereby bending the arm from the first angle to the second angle.