A process for producing a nanocomposite of a halogenated elastomer and an inorganic, exfoliated clay includes the in-situ protonation of a modifier, which may be an alkylamine, arylamine or an alkylarylamine. The magnetism detecting circuit includes a circuit board that is discrete from the board housing member, a sensor case that is discrete from the circuit board and is supported on the circuit board, and a rotation sensor held by the sensor case. The response of the seismic sensor to the test signal is adjusted to substantially match the response of the reference sensor to the test signal. The catalyst component concentrations and residence times are tightly controlled in the pre-contactor to affect product properties. The measurement device may also include multiple blocks arranged in a stack on the elongated base member to measure knee extension of a patient. Register file port multiplexer blocks are coupled to output lines of the tag assignment logic block adjacent to the orthogonal channel to receive tag information and to pass the tag information to address ports of a register file.