A protective device is disclosed for combination with an electrical switching device including a main current line or for integration in such a switching device. The composition includes a biologically effective amount of vitamin E for inhibiting propagation of lipid peroxidation that contributes to hearing loss. Structural systems according to embodiments of the present invention can be suitable for use in a variety of applications, including in ready-to-assemble furniture or cabinetry applications or as building and construction materials such as wall board, flooring, trim, and the like. The invention also provides nucleic acids, including coding sequences, oligonucleotide primers and probes, proteins, cloning vectors, expression vectors, transformed hosts, methods of developing pharmaceutical compositions, methods of identifying molecules involved in bone development, and methods of diagnosing and treating diseases involved in bone development. A corresponding communication device includes: a primary receiver configured to operate on a first network ; a secondary receiver configured and arranged to operate as a short range receiver with an access point that is independent of the first network; and a controller that is configured to control the secondary receiver in accordance with information obtained from the primary receiver.