  A new statistical field-theory model of isotropic turbulence is introduced.
The model renormalizes the effects of turbulent stresses into a
velocity-gradient-dependent random force. The model is well-defined within the
context of the renormalization group $\epsilon$ expansion, as the effective
expansion parameter is $O(\epsilon)$. The Kolmogorov constant and $N$ parameter
of turbulence are of order unity, in accord with experimental results.
Nontrivial intermittency corrections to the single-time structure functions are
calculated as a controlled expansion in $\epsilon$.
