  Many interfacial phenomena in physical and biological systems are dominated
by high order geometric quantities such as curvature.
  Here a semi-implicit method is combined with a level set jet scheme to handle
stiff nonlinear advection problems.
  The new method offers an improvement over the semi-implicit gradient
augmented level set method previously introduced by requiring only one
smoothing step when updating the level set jet function while still preserving
the underlying methods higher accuracy. Sample results demonstrate that
accuracy is not sacrificed while strict time step restrictions can be avoided.
