  We compute electrical and thermal conductivities of hydrogen plasmas in the
non-degenerate regime using Kohn-Sham Density Functional Theory (DFT) and an
application of the Kubo-Greenwood response formula, and demonstrate that for
thermal conductivity, the mean-field treatment of the electron-electron (e-e)
interaction therein is insufficient to reproduce the weak-coupling limit
obtained by plasma kinetic theories. An explicit e-e scattering correction to
the DFT is posited by appealing to Matthiessen's Rule and the results of our
computations of conductivities with the quantum Lenard-Balescu (QLB) equation.
Further motivation of our correction is provided by an argument arising from
the Zubarev quantum kinetic theory approach. Significant emphasis is placed on
our efforts to produce properly converged results for plasma transport using
Kohn-Sham DFT, so that an accurate assessment of the importance and efficacy of
our e-e scattering corrections to the thermal conductivity can be made.
