A unified communication application can allow a user to communicate with contacts across multiple electronic communication services. As the temperature of the heating resistor approaches the target fusing temperature, the predetermined time period is increased in step and the time period of step is decreased. Also, disclosed are methods of enhancing resistance of plants to abiotic stress, increasing nitrogen use efficacy in plants, reducing nitrous oxide emissions in air, reducing leaching of nitrates into soil and water, and enhancing sequestration of carbon from air. Still further provided by the invention are methods for producing soybean plants by crossing the soybean variety D4523081 with itself or another soybean variety and plants produced by such methods. Such movement can be vibrational in nature and is sufficient to overcome stiction, allowing a trapped element to be moveed to a desired location. In particular, the present invention relates to a disk-brake piston characterized in that it comprises a cup having a skirt and a head portion, and a tubular insert housed in the cup, a space for cooling air being defined between the outer surface of the tubular insert and the inner surface of the skirt of the cup.