Low-calorie beverage compositions comprising sucralose, acesulfame-K, calcium phosphate, calcium sulfate and potassium sulfate are disclosed. For example, the distortion signal may be generated by adding a first signal corresponding to the entire spectrum of the input signal to a second signal corresponding to a low-frequency component of the input signal and then subtracting from the result of addition a third signal corresponding to a specific frequency band of the input signal. During a first step, the substrate is damaged during a first light ion implantation step and subsequently substantially fully amorphized during a second heavy ion implantation step. The base is preferably constructed and arranged such that the indicator is visible and accessible to facilitate removal of the blown limiter. The surface mounting cap 14 is formed by pressing a phosphor bronze plate, and comprises a cap bottom section 30 and a flange section 16. The resulting proton conductors may be used as polymer electrolyte membranes in fuel cells operative over a wide range of relative humidity conditions and over a wide range of temperatures from below room temperature to above the boiling point of water.