Abstract: A technique for varying buoyancy of an apparatus includes providing a substrate configured to produce gas on demand when exposed to a liquid, exposing the substrate to such liquid, and capturing the gas produced by the substrate to increase the buoyancy of the apparatus within a fluid. In some examples, the liquid and the fluid contain the same material, such that gas may be produced using fluid already in the environment.

Abstract: Apparatus in the form of a bandage for generating an electrostatic field which when placed in proximity to a wound or scar induces polarization therein to facilitate the healing process. Methods of treating wounds and scars particularly in humans utilizing the bandage is also disclosed.

Abstract: Apparatus in the form of a bandage for generating an electrostatic field which when placed in proximity to a wound or scar induces polarization therein to facilitate the healing process. Methods of treating wounds and scars particularly in humans utilizing the bandage is also disclosed.

Abstract: A multi-rail transport system for transporting printed circuit boards along adjacent pairs of rails including first and second brake rods having parallel longitudinal axes and a plurality of brake cylinders slideably mounted on the brake rods, wherein each of the brake cylinders is adapted to be actuated between an engaged condition in which the brake cylinders are fixed in position and a disengaged condition in which the brake cylinders are free to slide along the brake rods. Also provided is a plurality of rails mounted to corresponding pairs of the brake cylinders. The system further includes first and second shuttles movably mounted adjacent to the brake rods, the shuttles being adapted to move in directions substantially parallel to the first and second longitudinal axes and to selectively engage the rails.