An adjustable spring mattress includes a plurality of parallelepipedal bodies made of a synthetic elastic material and being mutually coupled together. The FIFO reads the input data at the WR clock rate. The drive block is, in turn, actuated by an electromagnet that is external to the SLAMMIT sub-assembly. The exterior sheathing has an interior surface. DC power from the fuel cell assembly and AC power from the gas turbine generator are directed to a power conditioner.