Boltzmann 1 Boltzmann-Poisson 1 Boltzmann-Poisson system 1 Boltzmann-poisson Electron phonon 1 Electron scattering 1 Electron transport 1 Electron transport properties 1 Electron-phonon collision 1 Electron-phonon collisions 1 Galerkin methods 1 Phonons 1 Random variables 1 Semiconductors 1 Stochastic Galerkin 1 Stochastic Galerkin methods 1 Stochastic galerkin 1 Stochastic models 1 Stochastic systems 1 Stochastics 1 Uncertainty 1