System and methods for testing andor training a subject’s visual perception span andor speed are provided. The valve includes a valve housing, a valve closure member, and a valve seat. The propulsion unit includes a frost treatment system having at least one first pipe equipped with elements for regulating the passing air, for directing the hot air from the power plant to the air intake, and, an exhaust system having at least one second pipe equipped with elements for regulating the passing air, for directing air from the power plant to a delivery zone. A compatible non-volatile memory transistor can be formed from this basic structure by adding a high-K dielectric constant film with an embedded metal nano-dot layer between the tunnel insulator and the gate stack. Preferably, the syringe is adapted to engage a syringe interface mechanism such that the syringe may be connected to an injector without regard to any particular orientation of the syringe to the injector or to the pistonplunger assembly. The process uses a catalyst having large pores, and a minimal amount of micropores.