Finite-difference time-domain (FDTD) and finite-element time-domain (FETD) algorithms are among the most popular methods for the simulation of electromagnetics fields in the time-domain. This popularity stems in part from their unparalleled versatility and computational efficiency. The objective of this book is to present and study several state-of-the-art approaches aimed at improving the accuracy of FDTD and FETD for problems involving large-scale and/or disparate-size geometries. Topics discussed here include pre-asymptotic techniques to reduce numerical dispersion error, stable hybrid...