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3 Model Construction and Mesh Generation     continued...

One can use the GB (or another more computationally efficient) algorithm to automatically ascertain to which conductivity group an element belongs by defining the boundaries of the various subsurfaces and determining whether the centroids of the elements are inside or outside the region in question, assigning each to an appropriate conductivity group number. Once all the conductivity tensors are assigned to the groups, the preprocessing is complete and we are ready to compute solutions. For more information on mesh generation and various aspects of biomedical modeling, see [24,25,26,27,28,29,30,31].

(See exercise 8.)