A system for production of an electromagnetic field having EM emissions mitigated at one or more predetermined locations within a Hearing Aid Compliant measurement plane is provided. Optical centers of the color elements coincide substantially at an optical center for the pixel structure and any portion of a color element of the pixel structure has an equally luminous portion of the same color element located diametrically opposite thereto with respect to the optical center of the pixel structure. A control parameter is estimated for a powertrain system having multiple torque-generative devices operably connected to a transmission device having a torque output to a driveline. According to another aspect of the invention, a fixing process and system for use with a printing apparatus is provided wherein marking material is fixed to a receiver with a fixing roller and wherein a heat exchange medium is flowed through a first heating zone within the fixing roller, the first heating zone being biased toward the receiver.