A bipolar transistor is provided which includes a collector region, an intrinsic base region overlying the collector region and an emitter region overlying the intrinsic base region. The insert is used as a flow control device and is inserted into a conventional threaded ball valve. A height of the focusing electrode is identical to the width of the second opening, and wherein the width of the first opening is \u2153 or less of the second opening. One example of the system also provides time-domain processing of frequency components of the atrial heart rate interval signal to obtain the indication of patient well-being. The plug further comprises relatively recessed andor protruding structures on the face of the plug adjacent the elongate passage that engage the crest of the arbor and prevent inadvertent rotation of the plug on the arbor during firearm cleaning. The implantation steps form an n-well, a channel stop p-well region and emitter region which are vertically oriented within a semiconductor substrate.