A lubricating composition contains an oil of lubricating viscosity and 0. During a process of continuously forming an image on a plurality of recording media, the recording medium feeding speed is switched when the temperature of a fixing roller has dropped to a particular value which is set depending on the rate at which the temperature of the fixing roller drops. The other is an environmentally adapting process for modulating the signal demodulated from the input signal. The valley current is of a value greater than the first current value and the peak current is of a value lying between a second current value and the sum of said second value plus the value of the current generated the generator means. The ablation is produced by a coating of a biologically active material on the stent which destroys tissue or slows electrophyisiologic conduction through the tissue.