A Kedion pulse was a form of energy that could create interference in a positronic net, causing it to reset certain subroutines. (TNG: "Descent, Part II")

Jean-Luc Picard, Geordi La Forge and Deanna Troi used a phased Kedion pulse generated through modification of a Borg interlink transceiver to reset Data's ethical program. (TNG: "Descent, Part II")