In this paper, transmission line theory is used to model the current waveform in a lightning flash to ground. By adjusting the resistance, inductance, capacitance, and the initial voltage distribution within the channel all within reasonable limits, we are able to construct waveforms with rise...

In this paper, solutions of the equations which describe sound propagation in nonuniform ducts are computed with a finite element approach. A least squares approach is considered and compared to a Galerkin approach. The least squares problem is solved using an iterative method and compared with...