According to some embodiments, an arrangement is provided for cooling a heat-generating device, including a memory module, in a system such as a laptop computer. Embodiments of the invention may utilize in-phase and quadrature phase signals, where the magnitude portion of the signals may be used for regulating the modified signal. Hydrogen is filled so that a pressure in the hydrogen tank is higher than that in the hydrogen storage means. To again remove the temporary rasta hairstyle a composition that increases the combability is applied to the hair and the rasta strands are opened and unwound or untwisted. An accuracy of a user response is then determined and conveyed to the user.