A method and apparatus for improved digital rights management is provided. The optical module includes a light guide plate and a decorative layer. A detector is then configured to receive reflections of the non-visible light beam from the projection surface. , for the treatment, prevention, andor management of various disorders, such as CNS disorders and metabolic disorders, including, but not limited to, e. The tap handle restricts and allows beverage flow through a beverage port. Also disclosed are methods of making and using sentrin polypeptides and nucleic acid segments in various diagnostic and pharmaceutical applications.