  In this paper, we study the output feedback stabilization for a scalar
conservation law with a nonlocal velocity, that models a highly re-entrant
manufacturing system as encountered in semi-conductor production. By spectral
analysis, we obtain a complete result on the exponential stabilization for the
linearized control system. Moreover, by using a Lyapunov function approach, we
also prove the exponential stabilization results for the nonlinear control
system in certain cases.
