The invention relates to power systems. More particularly, the invention relates to electric vehicle battery charging systems. In the invention a superconducting conductor is used to charge the electric car battery, resulting in a short charging time.

The invention relates to power systems. More particularly, the invention relates to electric vehicle battery charging systems. In the invention a superconducting conductor is used to charge the electric car battery, resulting in a short charging time.

A gravitational radiation communication system. The system includes a gravitational radiation transmitter and a gravitational radiation receiver. Each of the transmitter and the receiver includes a first cylindrical superconducting cavity, having a first length, a first diameter, and an entrance aperture for electromagnetic radiation; a second cylindrical superconducting cavity, having a second length, a second diameter, and a first aperture for gravitational radiation, the second cavity being coaxial with and adjacent the first cavity; and a superconducting movable membrane positioned between the first cavity and the second cavity and configured to provide parametric amplification of electromagnetic fields in the second cavity. The first aperture is configured to pass gravitational radiation.

A gravitational radiation communication system. The system includes a gravitational radiation transmitter and a gravitational radiation receiver. Each of the transmitter and the receiver includes a first cylindrical superconducting cavity, having a first length, a first diameter, and an entrance aperture for electromagnetic radiation; a second cylindrical superconducting cavity, having a second length, a second diameter, and a first aperture for gravitational radiation, the second cavity being coaxial with and adjacent the first cavity; and a superconducting movable membrane positioned between the first cavity and the second cavity and configured to provide parametric amplification of electromagnetic fields in the second cavity. The first aperture is configured to pass gravitational radiation.

An improved system for handling delicate linear media and in particular to a method and apparatus for winding delicate linear media such as superconducting wire or tape or optical fibers onto a spool or former. A combination of direct closed loop control and media routing design facilitates the handling of the delicate media without causing damage. The axial tension in the linear media may be closely controlled during winding by means of feedback control loop using tension measurements to control the rotation speeds of the wind-from and wind-to spools. Further, during winding, the delicate linear media is only exposed to large radius bends with no reverse bending. Finally, output devices and features, commercial or otherwise, made possible by delicate linear media handling are revealed. This includes advanced SC devices and features.

An improved system for handling delicate linear media and in particular to a method and apparatus for winding delicate linear media such as superconducting wire or tape or optical fibers onto a spool or former. A combination of direct closed loop control and media routing design facilitates the handling of the delicate media without causing damage. The axial tension in the linear media may be closely controlled during winding by means of feedback control loop using tension measurements to control the rotation speeds of the wind-from and wind-to spools. Further, during winding, the delicate linear media is only exposed to large radius bends with no reverse bending. Finally, output devices and features, commercial or otherwise, made possible by delicate linear media handling are revealed. This includes advanced SC devices and features.

A gravitational radiation communication system. The system includes a gravitational radiation transmitter and a gravitational radiation receiver. Each of the transmitter and the receiver includes a first cylindrical superconducting cavity, having a first length, a first diameter, and an entrance aperture for electromagnetic radiation; a second cylindrical superconducting cavity, having a second length, a second diameter, and a first aperture for gravitational radiation, the second cavity being coaxial with and adjacent the first cavity; and a superconducting movable membrane positioned between the first cavity and the second cavity and configured to provide parametric amplification of electromagnetic fields in the second cavity. The first aperture is configured to pass gravitational radiation.

A gravitational radiation communication system. The system includes a gravitational radiation transmitter and a gravitational radiation receiver. Each of the transmitter and the receiver includes a first cylindrical superconducting cavity, having a first length, a first diameter, and an entrance aperture for electromagnetic radiation; a second cylindrical superconducting cavity, having a second length, a second diameter, and a first aperture for gravitational radiation, the second cavity being coaxial with and adjacent the first cavity; and a superconducting movable membrane positioned between the first cavity and the second cavity and configured to provide parametric amplification of electromagnetic fields in the second cavity. The first aperture is configured to pass gravitational radiation.

A method for preparing a thin-walled composite pipe is provided, in which an AlN particle/zinc-aluminum 27 (AlN.sub.p/ZA27) composite billet is subjected to multi-pass reciprocating extrusion at 250-350 C., and then loaded into a pipe extrusion die. The composite billet is heated with the temperature being in an ascending gradient distribution (within a range of 250-350 C.) along an extrusion direction from the billet to an outlet of the die, then kept a preset temperature for a period of time, and finally extruded at a rate of 0.1-0.5 mm/s to obtain the thin-walled composite pipe. A thin-walled composite pipe prepared by this method is also provided, including an AlN particle and a ZA27 alloy.

The present invention relates to electrical network comprising an electrical conductor and, a cryogen source configured to hold cryogen, the cryogen source arranged so that, in use, cryogen is provided to the conductor to maintain the conductor in a hyperconductive state.