A system is configured to test a pickup on a guitar without soldering the pickup to the guitar. This invention also relates to the use of such compounds to provide a neuroprotective effect to the eye of mammalian species, particularly humans. Then, in a spreading process, the glass substrate is rotated about an axis located at the approximate center of the inner surface to make the phosphor slurry spread out over its inner surface. The membership functions enable estimation of an output parameter value of the plasma process, such that the membership functions characterize the plasma process with regard to the output parameter. This byte written to the counter is readily available from the actual parameter value representing the size of the bar without significant additional calculation. An adder generates, from the feedback value and the feedforward value, a control amount used to position the head in the target position.