Chilling out with computer games

DUBLIN-Gary McDarby is an Irish electrical engineer admittedly besotted by science, but also keenly interested in helping children in need. A decade ago he was working as a volunteer, dealing with youngsters who had been forced to become child soldiers in Liberia. One 10-year-old lad, who had taken part in a firing squad that killed a woman, was so traumatized by nightmares that he couldn't sleep. McDarby, desperate to help the child, gave him a Walkman loaded with a tape of the serene Celtic chanteuse, Enya. It did the trick, quieting the boy and helping to ease him into sleep. After that incident, McDarby concluded that "smart technologies" that taught people how to calm down could one …