  We study the non-equilibrium transport properties of fully (exactly) screened
Kondo quantum dots subject to a finite bias voltage or a finite temperature.
Firstly, we calculate the Fermi-liquid coefficients of the conductance for
models with arbitrary spin, i.e. its leading behaviour for small bias voltages
or temperatures. Secondly, we determine the low-temperature behaviour of the
static susceptibility from the exactly known Bethe Ansatz results for the
magnetisation. Thirdly, we study the crossover from strong to weak coupling in
the spin-1/2 and the spin-1 models coupled to one or two screening channels
respectively. Using a real-time renormalisation group method we calculate the
static and dynamical spin-spin correlation functions for the spin-1/2 model as
well as the linear and differential conductance and the static susceptibility
for the spin-1 model. We define various Kondo scales and discuss their
relations. We assess the validity of the renormalisation-group treatment by
comparing with known results for the temperature dependence of the linear
conductance and static susceptibility as well as the Fermi-liquid behaviour at
low energies.
