The present invention is a method for obtaining an electrical signal from a patient that corresponds to a meridian. Optical sensors are provided by sections of the optical conductor bounded by pairs of the low reflectivity mirrors. This opposed relationship causes the flutes to push displaced plastic lumber material away from the screw head while the flutes bore a space for plastic lumber material displaced by countersinking the screw head. A combination of a stabilizing nut and stabilizer base can be used to provide the force. It is substantial to the invention that a controlregulating device is provided via which during the brewing process a brewing pressure acting on the coffee powder is adjustable. For each data stream that is transformed through processing, a context is maintained that comprises state information and includes a history and state information that enables the transformation for the data stream.