Abstract: A method includes executing, on a processor of a computing device, instructions that cause the computing device to perform operations. The operations include executing, on a processor of a computing device, instructions that cause the computing device to perform operations. The operations include receiving site features associated with a communication site and receiving event features associated with a potential outage-causing event. A classifying engine is employed to generate an impact metric indicating an effect on the communication site from the potential outage-causing event based on the site features and the event features.

Abstract: Aircraft Auxiliary Power Unit (APU) controllers and related methods are described herein. An example APU controller includes a sensor interface to receive a signal from a speed sensor. The signal includes pulses representing a rotational speed of an engine of an APU. The APU controller also includes an overspeed detection circuit including a counter to count a number of pulses from the signal occurring within a time interval, a digital-to-analog converter (DAC) to convert the number of pulses into an analog voltage signal and a comparator to: compare the analog voltage signal to an overspeed threshold signal and generate a shutdown command in response to the analog voltage signal exceeding the overspeed threshold signal. The APU controller also includes a valve driver to, in response to receiving the shutdown command, cause a fuel shutoff valve to cease fuel flow to the engine of the APU.

Abstract: A method includes executing, on a processor of a computing device, instructions that cause the computing device to perform operations. The operations include executing, on a processor of a computing device, instructions that cause the computing device to perform operations. The operations include receiving site features associated with a communication site and receiving event features associated with a potential outage-causing event. A classifying engine is employed to generate an impact metric indicating an effect on the communication site from the potential outage-causing event based on the site features and the event features.