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Ala et al. (2008) have proposed a soil ionization model, on the basis of the dynamic soil-resistivity model of Liew and Darveniza (1974), for finite-difference time-domain (FDTD) computations, and tested the validity of the model against experiments on a single vertical grounding rod. In the model, the resistivity of each soil-representing cell is controlled by the instantaneous value of the electric...
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