The invention relates to a vulcanizable rubber composition comprising a rubber, sulfur or a sulfur donor, a vulcanization accelerator, a protective agent and 0. The discriminator includes first and second dispersion arms for causing first and second additional amounts of dispersion to be added in first and second portions of the optical signal, respectively. Piercing the activator container causes activator to combine with the reactant and cause an exothermic reaction that heats the target container. The speech recognition system is operable to analyze the interface information to recognize spoken commands issued for controlling or operating said target system.