Abstract: Proposed is a substrate treating apparatus. The substrate treating apparatus includes a treating container having a treating space therein, a support unit supporting and rotate a substrate in the treating space, and a liquid supply unit supplying a treating liquid onto the substrate, wherein the liquid supply unit may include a nozzle member and an actuator for moving the nozzle member, wherein the nozzle member may include nozzles arranged along a first direction so that the nozzles form a first row and nozzles coupled to the body and arranged along the first direction so that the nozzles form a second row, wherein the first row and the second row may be spaced apart from each other in a second direction perpendicular to the first direction when viewed from above. At this time, the nozzles constituting the nozzle member may be observed as a whole from the front.

Abstract: A method for measuring a brain wave comprises extracting positive and negative peaks from an electrocardiogram (EKG) signal reflecting heartbeat information, and positive peaks from an electroencephalogram (EEG) signal reflecting heartbeat-caused noise information and brain wave information. The positive peaks of the EEG signal are classified into a first peak group and a second peak group based on the positive peaks of the EKG signal. The first peak group is affected more greatly by the heartbeat than by the brain wave, and the second peak group is affected more greatly by the brain wave than by the heartbeat. Noise of the first and second peak groups is removed from the EEG signal.

Abstract: A method for measuring a brain wave comprises extracting positive and negative peaks from an electrocardiogram (EKG) signal reflecting heartbeat information, and positive peaks from an electroencephalogram (EEG) signal reflecting heartbeat-caused noise information and brain wave information. The positive peaks of the EEG signal are classified into a first peak group and a second peak group based on the positive peaks of the EKG signal. The first peak group is affected more greatly by the heartbeat than by the brain wave, and the second peak group is affected more greatly by the brain wave than by the heartbeat. Noise of the first and second peak groups is removed from the EEG signal.