Abstract: A method and a device are disclosed including detecting a brainwave pattern associated with a particular mental and/or physical state of a user, classifying the detected brainwave pattern to identify the particular mental/physical state of the user, and generating an alarm signal to notify the user, other authority, and/or to be used otherwise. In various embodiments, the brainwave pattern data may be recorded and used for statistical analysis, work or process scheduling, or other management decisions. In various embodiments, the brainwave pattern is detected and/or recorded using a cap or harness with embedded electrodes, a controller for controlling the electrodes, collecting data, transmitting the data to a local or central data storage device, and generating an alarm.