We propose the notion of active stabilization for computing systems. Unlike typical stabilizing programs (called passive stabilizing in this paper) that require that the faults are absent for a long enough time for the system to recover to legitimate states, active stabilizing programs ensure recovery in spite of constant perturbation during the recovery process by an adversary. We identify the...

Pliocene and Quaternary tectonic structures mainly consisting of segmented northwest–southeast normal faults, and associated seismicity in the central Betics do not agree with the transpressive tectonic nature of the Africa–Eurasia plate boundary in the Ibero-Maghrebian region. Active extensional deformation here is heterogeneous, individual segmented normal faults being linked by relay ramps a...

For a class of uncertain nonlinear systems with actuator faults, robust active fault-tolerant control is investigated based on the adaptive observer, feedback linearization, and backstepping design theory. Time-varying faults and bounded uncertainty are simultaneously considered in the paper. An adaptive observer is firstly constructed to estimate the faults and then a backstepping-based active...