This review volume is based primarily on the balance equation approach developed since 1984. It provides a simple and analytical description about hot electron transport, particularly, in semiconductors with higher carrier density where the carrier-carrier collision is much stronger than the single particle scattering. The steady state and time-dependent hot electron transport, thermal noise, hot phonon effect, the memory effect, and other related subjects of charge carriers under strong electric fields are reviewed. The application of Zubarev's nonequilibrium statistical operator to hot electron transport and its equivalence to the balance equation method are also presented. For semiconductors with very low carrier density, the problem can be regarded as a single carrier transport which will be treated non-perturbatively by the nonequilibrium Green's function technique and the path integral theory. The last part of this book consists of a chapter on the dynamic conductivity and the shot noise suppression of a double-carrier resonant tunneling system.Contents:Balance-Equation Approach to Hot-Carrier Transport in Semiconductors (X L Lei & N J M Horing): Recent Developments in Magnetotransport Theory (N J M Horing et al.)Effect of Nonequilibrium Phonon on the Electron Relaxation and Transport (M Lax & W Cai)Nonlinear Transport of Electrons under a Strong High Frequency Electric Field in Semiconductors (W Cai & M Lax)Nonequilibrium Statistical Operator in Hot-Electron Transport Theory (D Y Xing & M Liu)Path Integral Study of Polaron Transport under High Electric Field (Z B Su): Impurity Resistivity under Thermalized Condition (C S Ting & L Y Chen)Nonequilibrium Green's Function Approach to Dynamic Properties of Resonant-Tunneling through Double Barrier Structures (L Y Chen & C S Ting)Readership: Physicists and electrical engineers.Key Features:Comprehensive introduction of the Tohoku University Global COE ProgrammeIntegrated research and education collaboration between engineering and medicineJapan's top level research promotion in the field of nano-biomedical engineering