  Using information entropy formalism, we consider a one-dimensional system
with heat flux and extend the meaning of equilibrium variables to non
equilibrium scenarios when classical local equilibrium approach is not
applicable; this is particularly important for the performance evaluation of
modern thermal systems and microdevices, which usually operate in extreme
situations. The extended non equilibrium entropy, temperature, thermal
conductivity and heat capacity have been analyzed as functions of the local
energy density (kinetic temperature) and heat flux.
