A method using a multi-purpose reagent composition to simultaneously determine concentrations of at least two analytes in a water sample. A mechanical linkage operatively interconnects the motor with an actuator which generates a source of pressurized air upon movement of the actuator from its cocked to its un-cocked position to effect automatic repeated movement of the actuator to its cocked position and release from its cocked position. The concentrator demultiplexessplits received signals for the mini-fiber nodes and the fiber nodes and forwards demultiplexedsplit signals respectively. In an alternate embodiment, the system contains one heat exchanger, the media-side area of which is connected to a valve device, which distributes the evaporated andor superheated mixture to at least two conduits, each of which leads to one of the two components of the gas generation system. The mask is used to assign data compression quality factors to corresponding regions in the image data. The core shells are assembled together so as to make the three-dimensional percolated layer, having cavities whose size is around wavelength.