A programmable offset amplifier includes first and second input transistors having differentially connected sources and gates coupled to first and second input voltages. The turbine rotor assembly includes a rotor disk having a forward side and an aft side, a rotor platform positioned on a periphery of the rotor disk, the rotor platform defining an aft flow discourager, a rotor blade mounted on the rotor platform extending into the mainstream gas flow, and an aft seal plate mounted on the aft side of the rotor disk. Responses are prompted if performance monitoring indicates that an application is performing below a predefined level or failing to perform entirely. The current invention deals with the intracavity electrical contacts for current injection for this type of MEM-tunable VCSEL’s. The pressure value of that first joint then becomes the target pressure value for any subsequent joints. Both authorization and notification plug-ins return errors that are passed to the user through the computer operation.