A touch panel includes a touch sensor, a liquid crystal panel, and a reverse circuit. The system stores a list of hierarchies as a single object. The authorization station also maintains a number of role definitions that each define access permissions for specific requesting entities by using one or more of the role templates. A node dielectric is coated on the interior surface of the deep trench. The cathode contains at least about 60% by weight MnO2 and at least about 2% by weight of a hydrophobic polymer; the MnO2 consists essentially of electrochemically synthesized MnO2. The pumping axis coincides with the cavity propagation axis inside the active medium, and is perpendicular to an optical surface met by the pump beam after crossing the active medium, the optical surface being at least partially reflecting at the wavelength of the pump beam.