EyeWriter [SEP] material used
EyeWriter
The EyeWriter is a low-cost eyetracking system originally designed for paralyzed graffiti artist TEMPT1. The EyeWriter system uses inexpensive cameras and open-source computer vision software to track the wearer's eye movements. 
EyeWriter was conceived by Mick Ebeling and developed at Ebeling's home in Venice Beach by artists and engineers from the Free Art & Technology Lab, Graffiti Research Lab and OpenFrameworks teams, including Zachary Lieberman, Evan Roth, James Powderly, Theo Watson and Chris Sugrue.
The project has been recognized with numerous awards
to cathodically protect metals that are exposed to sea water. A zinc disc attached to a ship's iron rudder will slowly corrode while the rudder stays intact. Similarly, a zinc plug attached to a propeller or the metal protective guard for the keel of the ship provides temporary protection.
With a standard electrode potential (SEP) of −0.76 volts, zinc is used as an anode material for batteries. (More reactive lithium (SEP −3.04 V) is used for anodes in lithium batteries ). Powdered zinc is used in