alan turing alpha wave amplifier autonomous robot beam robotics behavior brain brain wave bristol cambridge cathode ray tube computation consciousness cybernetics delta wave digital eeg topography electroencephalography epilepsy europe festival of britain free will hans berger hans moravec ivan pavlov koch snowflake mark tilden missouri nicolas walter occipital lobe owen holland phototaxis radar reaction time robot roboticist rodney brooks scientist sleep smithsonian institution soviet union triangulation united states university of the west of england westminster school