Systems and methods generate an account recovery key for a protected system. A titanium oxide layer is deposited on the substrate as a base layer, made from TiOx with an oxygen content of 0. Also disclosed are compositions for use in practicing the method. An illustrative method embodiment derives multiple feedback signals from at least one displacement signal, applies the multiple feedback signals to an arrangement of electrodes that capacitively couple the proof mass to a substrate, and converts the multiple feedback signals into an acceleration signal. The method can effectively avoid unnecessary operations, and reduce energy consumption of the UE. The lateral wedge andor the arch support significantly reduce the knee and hip torques during walking, running, standing, or other weight bearing activities including athletic endeavors.