A pump-probe scheme measures the rise time of ultrafast x-ray pulses. The method preferably includes the steps of monitoring for a change to the value of one or more local resource properties associated with the managed network device; generating a learning event report comprising the value of at least one of the one or more local resource properties; and transmitting the learning event report to a central data store. The profile sections at each distance Z are joined smoothly to one another to form a complete airfoil shape.