secs1D >> SEmiConductor Simulator in 1D DDG DDGelectron_driftdiffusion DDGgummelmap DDGhole_driftdiffusion DDGn2phin DDGnlpoisson DDGp2phip DDGphin2n DDGphip2p DDGplotresults DDN DDNnewtonmap Utilities constants Ubern Ubernoulli Ucompconst Ucomplap Ucompmass Udriftdiffusion Umediaarmonica Uscharfettergummel secs1d