Abstract: Presently disclosed is a power production plant that is operable to store and generate power. In a “charge mode” (when electricity price is low), an air separation unit (ASU) cools and liquefies ambient air into liquid oxygen (LOx), which is then stored in a storage vessel. In a “discharge mode” (when electrical price is high), the stored LOx is used by the power production plant to combust a fuel and form a combustion product stream that can be expanded in a turbine to generate power. The power production plant particularly can utilize carbon dioxide as a recycled, circulating or working fluid so that substantially all carbon dioxide produced in the power production can be captured.

Abstract: A head support system for a seat of a motor vehicle, with a strap system that is constructed and arranged to be coupled to the motor vehicle such that a strap portion is located along two sides the seat, proximate the expected location of the head of a person sitting in the seat, and a pair of head cushions, one of the head cushions coupled to each of the strap portions.

Abstract: An elliptical reflector is provided that produces a small, circular, concentrated light beam and a less bright, larger outer elliptical flood light. The outer rim of the reflector is curved, and a matching curved lens is provided for covering the outer rim of the reflector. The curved outer rim of the reflector and the curved lens permit the light beam to extend in a broader horizontal pattern of light, potentially providing close to 180 degrees of illumination. If desired, a portion of the light can be directed downward to light a dark path, for instance.