AIP Conference Proceedings [AIP Publishing LLC RECENT DEVELOPMENTS IN NONLINEAR ACOUSTICS: 20th International Symposium on Nonlinear Acoustics including the 2nd International Sonic Boom Forum - Écully, France (29 June–3 July 2015)] - Development of a hybrid finite difference solution of the Westervelt equation using the fast nearfield method as a boundary condition for focused sources: or microbubble nuclei interaction with histotripsy shockwaves