A fog or mist generating nozzle assembly produces a swirling fog pattern having a forward thrust component that permits an operator, stationed safely at a remote location relative to a fire source, to exercise directional control and positioning of a relatively large mist cloud on or about the fire source. The first oxide layer is configured as an etch-stop for forming silicon nitride sidewall spacers of a gate structure located adjacent to the source and drain regions. Analysis of electrical conduction velocity can be used to verify the occurrence of myocardial ischemia in a more reliable manner. The coupling portion 113 includes a thin plate-shaped central flexion allowable region 113a and base end continuous regions 113b, 113b with gradually increased plate thickness from the central flexion allowable region 113a side toward the front side plate portion 111 and rear side portion 112, respectively. The cap is formed of sheet material which is both plastically and elastically deformable.