A polyoxymethylene having enhanced thermal stability and resistance to depolymerization is obtained by using an alkylated melamine compound of formula as a polymerization terminating agent in a polymerization of formaldehyde or a cyclic oligomer thereof and an optional comonomer in the presence of an acid catalyst: . During operation, the system transmits a signal through a capacitive transmitter pad and receives a corresponding input signal through a capacitive receiver pad. Subsequently, the actions index may be used to suggest actions based on similarity of the stored characteristics to those of a current user andor actions. The resonance frequency of the LC circuit can be remotely detected by measuring and determining the corresponding peak in electromagnetic impedance of the transducer.