George Poonkhin Khut George Poonkhin Khut, 'BrightHearts app', 2013, Heart rate controlled relaxation training app for iOS devices; iPads. Courtesy Sensorium Health (George Khut and Jason McDermott).Artworks — Exhibitions George Poonkhin Khut BrightHearts app 2013Heart rate controlled relaxation training app for iOS devices; iPads. Courtesy Sensorium Health (George Khut and Jason McDermott).