Abstract: A system an analog to digital converter (ADC) operatively connected to receive an analog input signal from an input line and to output a digital input signal. A processor is operatively connected to receive the digital input signal from the ADC and to output a digital control signal for controlling a physical system based on the digital input signal. A digital to analog converter (DAC) is operatively connected to receive a copy of the digital input signal put out from the processor, and to output an analog output signal indicative of the copy of the digital input signal put out from the processor. Comparison logic is operatively connected to receive the analog input signal from the input line, to receive the analog output signal from the DAC, and to output an error signal in response to a mismatch between the analog input signal and the analog output signal.

Abstract: A generator control unit includes a plurality of permanent magnet generator (PMG) inputs, a transformer including a multi-configuration input winding and at least one output winding. Each PMG input in the plurality of PMG inputs is connected to the multi-configuration input winding at a corresponding input winding input.

Abstract: A generator control unit includes a plurality of permanent magnet generator (PMG) inputs, a transformer including a multi-configuration input winding and at least one output winding. Each PMG input in the plurality of PMG inputs is connected to the multi-configuration input winding at a corresponding input winding input.

Abstract: An apparatus and method to provide a more interactive book learning experience. The invention provides an interactive quiz component to book figures. Figures within an electronic document can be enlarged by a user input such as a touch gesture. Selected information from the enlarged figure can be hidden and used as an interactive quiz. Feedback and options for further review or interactions are provided based on user input.

Abstract: An aspect of the present invention relates to tracking a computer user's behavior and providing related visual media segments with a graphical user interface. In embodiments, the visual media segments are slide-in visual media segments and the user has preemptive control over certain aspects of the visual media segments.