摘要:
Disclosed herein is method for making a wire comprising contacting a first end of a first superconducting wire with a second end of a second superconducting wire, wherein the superconducting wire comprises a superconducting filament having a superconducting composition comprising magnesium diboride; heating the first end of the first superconducting wire with the second end of the second superconducting wire at a point to form a joint, wherein the superconducting filament having the superconducting composition is in continuous electrical contact with any other part of the superconducting filament after the formation of the joint.
摘要:
A Magnetic Resonance Imaging (MRI) system having a vacuum vessel positioned about an imaging volume, one or more high temperature superconducting coils positioned within the vacuum vessel, and a cryocooler coupled to the vacuum vessel to operate the superconducting coil at a temperature above 10 K. At least one gradient coil is positioned between an imaging volume and the superconducting coil without any thermal shielding interposed between the gradient coil and the superconducting coil.
摘要:
A method for forming a dispersion-strengthened material containing nanoparticles that are uniformly dispersed in a matrix phase. The method includes adding nanoparticles and a molten material to a container to form a pool within the container and rotating the container to create a convection vortex in the pool. The convection vortex is sufficient to cause the nanoparticles to be incorporated into the molten material so as to yield a molten composite material, and further causes the molten composite material to be ejected from the container. The molten composite material is then cooled to form a solid composite body comprising a uniform dispersion of the nanoparticles.
摘要:
A roll up storm shutter slat connector (1) having a substantially rigid body, preferably made of extruded aluminum, having a hook end (3), a receiving end (4) and a centrally located channel (20) for the accommodation of a retention means (5). The slat connector (1) is compatible with conventional shutter slats (2) having a hook end (6) and a receiving end (7). In use, the present invention alternates between conventional shutter slats (2) to form a curtain (23). The retention means (5) located in the slat connectors (1) are inserted into retention tracks (8) and (21) wherein the slat connectors (1), and attached conventional shutter slats (2), are held in place during excessive forces.
摘要:
A soft magnetic particle having an elongated first portion and a second portion disposed on the first portion in an amount from about 0.05 weight percent to about 1 weight percent is provided. The first portion is formed of a soft magnetic material. The second portion is formed of an electrically insulating material.