  Based on the Robertson theory the nonlinear dynamics of general Ising systems
coupled microscopically to bath systems is investigated leading to two
complimentary approaches. Within the master equation approach microscopically
founded transition rates are presented which essentially differ from the usual
phenological rates. The second approach leads to coupled equations of motion
for the local magnetizations and the exchange energy. Simple examples are
discussed and the general results are applied to the Sherrington-Kirkpatrick
spin glass model.
