An annular elastic gasket adapted to be disposed between an insertion hole formed in a housing and a cylindrical body which is inserted into the housing via the insertion hole in such a manner that the annular elastic gasket elastically contacts an inner surface of the insertion hole and an outer circumferential surface of the cylindrical body. At least one stop layer is formed on the semiconducting layer above a part of the active region. Since modern operating systems include support for the user interface devices as well as transmitting and receiving real-time data streams, the phone client software does not require any specific interfacing software to be installed on the client workstation. A set screw in the lateral opening of the limb bolt washer locks the cap screw against rotation with respect to the limb bolt washer. The participant is mapped to a portrait using the participant feature vector. The lead head can be rotated, rotating the helical electrode into the tissue, and the catheter, drive shaft, and fiber optic probe removed.