In a method for dividing a frequency of a clock signal, a first frequency divided signal is generated based on a clock signal. A magnet is also included to provide a magnetic field to the Faraday rotator. The first reflecting structure includes an inner reflective surface at least a portion of which is inclined to form a wedge with the back reflector. The convenience of obtaining premium service on-demand offers content providers and carriers opportunity to realize profits based on subscriber’s improved willingness. The one or more characteristics may comprise an identity or a type of a provider associated with the acquired content, a quality of the acquired content, power consumption associated with communicating the acquired content to a destination device, or power consumption associated with presenting or otherwise processing the acquired content on a destination device. Also provided are methods of making acyl amino acids using engineered polypeptides.