Abstract: A parking enforcement device can be secured to a surface adjacent to the area designated as NO PARKING. The enforcement device can include an elongated hollow body, a window provided to the tubular body, a battery, an internal frame assembly disposed inside of the elongated hollow body, and a camera disposed inside of the elongated hollow body. The internal frame assembly defines a cavity in which the battery is located. A camera support pole extends vertically upwards from the internal frame assembly. The camera is secured to the camera support pole and located vertically along the camera support pole such that the camera views outward through the window. A solar panel can be provided atop the parking enforcement device to recharge the battery.

Abstract: A method and system for processing of natural gas in which a gaseous natural gas stream which is made up of a mixture of hydrocarbons is introduced into a vortex tube, forming a hot fluid stream and a cold fluid stream. The cold fluid stream is introduced into the upper section of a distillation column and the hot fluid stream is introduced into the lower section of the distillation column, resulting in improved separation of the heavier hydrocarbon components in the natural gas stream from the lighter hydrocarbon components disposed in the natural gas stream.

Abstract: A control system for an absorption heat transfer plant controls the quantity of heat input into the plant's concentrator in response to the plant's evaporator liquid refrigerant temperature. The control system also controls the temperature of the cooling fluid for the plant's absorber and condenser.

Abstract: A control system for an absorption heat transfer plant controls the quantity of heat input into the plant's concentrator in response to the plant's evaporator liquid refrigerant temperature. The control system also controls the temperature of the cooling fluid for the plant's absorber and condenser.