  1 Introduction 2 Simple model of spin injection 3 Spin-polarized transport:
concepts and definitions 4 The standard model of spin injection: F/N junction 5
Nonequilibrium resistance and spin bottleneck 6 Transparent and tunnel
contacts, conductivity mismatch 7 Silsbee-Johnson spin-charge coupling 8 Spin
injection in F/N/F junctions 9 Nonlocal spin-injection geometry:
Johnson-Silsbee spin injection experiment
