One or more methods for generating electricity using waste heat are provided herein. The elongated element comprises a core and a coating system. 07 mm, at least one metal film for adjusting an oscillation frequency of the quartz crystal resonator being disposed on at least one of the opposite main surfaces of each of the first and second vibrational arms. Removing the terminal from the wrist requires operation of a release means or the overcoming of a predetermined force, which is a safety measure of the hinges and the terminal. In some embodiments, the systems and methods may be realized as a method for managing a key-value store including creating an uncompressed tree of key-value pairs, monitoring the growth of the uncompressed tree, compressing the uncompressed tree when the uncompressed tree meets andor exceeds a specified threshold, and creating a new empty uncompressed tree.