A switcher device comprises a multiplexer coupled in-between at least one input and output cards. The syringe plunger includes a pressurizer disposed at a proximal end, and a distal end bifurcated into a first plunger arm having a first conical surface and a second conical surface, and a second plunger arm having a first conical surface and a second conical surface. The control function can include a ratio parameter that indicates the relative or proportional amounts of change to the control parameters. The difference value calculator 5 subtracts the output of the change pixel predictor 4 from the output of the change pixel detector 2. Instead of being cylindroid, these channels may form cross sectional rectangular or arcuate channels, or cross sectionally water droplet like channels.