Abstract: A magnetic resonance imaging superconducting magnet including a cryostat, a gradient coil and superconducting gradient shield positioned around the gradient coil with an active resistive shimming member contiguous to the cryostat vessel; and the gradient shield being selectively cooled to superconducting operation after the magnetic shimming fields generated by the shimming member for field homogeneity within the bore of the magnetic resonance imaging magnet are induced onto, and maintained by, the superconducting gradient shield and operation of the resistive shimming member discontinued.

Abstract: A turbine blade includes an airfoil having opposing first and second sides and an internal passage extending longitudinally therebetween. A plurality of first turbulator ribs extend from the first side into the passage, and a plurality of second turbulator ribs extend from the second side into the passage. The first and second ribs are different in configuration from each other for obtaining different heat transfer enhancements on the first and second sides for reducing pressure losses and cooling air flow requirements.

Abstract: Oxalic acid diarylamides are described as useful monomers and comonomers in the polymerization of polycarbonates. The resin products resist degradation by ultra-violet light radiation. They can also be incorporated as comonomer or monomer in the polyester, polyester, polyether, polyethersulfone resins. They can also be used as UV stabilizers in the aforemetioned systems.

Abstract: A method for fabricating a stack of circuit modules includes providing a plurality of substrates having module interconnection layers. Each of the substrates has a circuit chip with chip pads positioned therein and an electrically conductive feed-through line extending from a first surface of the substrate to a second surface of the substrate with the first surface being perpendicular to the second surface. Each of the module interconnection layers is situated over a respective first surface of each of the substrates and includes a module dielectric layer having module vias therein and a module pattern of electrical conductors extending through the module vias to couple the selected chip pads to the feed-through line. The plurality of substrates are stacked. A side interconnection layer is applied over a side surface including the second surfaces of the substrates.

Abstract: A method is described for increasing the temporal resolution of MR fluoroscopy procedures. A central portion of the image requiring a higher temporal resolution is updated more frequently using less-than-complete newly acquired NMR data. A running average of the signals produced by peripheral structures is used to form the periphery of the image and to remove artifact-producing data from the less-than-complete NMR data.

Abstract: The repair method includes removing eroded or damaged trailing edge portions of partitions in the diaphragm of a turbine, over 50% of the length of the partitions being removed commencing at the trailing edge. A coupon which is a precise replication of a portion of an originally specified partition is welded to the remaining or extant partition portion by a seal weld along the radial length of the coupon on the suction side of the repaired partition and two full penetration welds at the ends of the coupon to secure it to the inner and outer rings or side walls of the diaphragm. The repaired partition is thus substantially identically contoured as the original partition.

Abstract: A non-corrosive translucent room temperature vulcanizable silicone composition consists essentially of an alkyl alkoxy stopped diorganopolysiloxane, a polyalkoxysilane crosslinking agent and a tetra alkyl titanate condensation cure catalyst.

Abstract: An assembly to mount an appliance on a floor includes a pair of openings in the appliance base, each surrounded by a helical thread. The thread includes a pair of downwardly projecting detents. A mount for each opening includes a head with a shaft extending from the top thereof and received in the opening. The shaft includes an external helical thread mating with the appliance base thread. The mount is made of plastic which cold flows sufficiently for the shaft thread to conform to the detents. An unbalance responsive mechanism includes a strap extending across the housing with a transverse pin adjacent each end. A mount for each end of the strap includes a head with a shaft extending from the top thereof. The distal end of the shaft includes transverse openings to receive an end portion of the strap and the corresponding transverse pin. Non-skid, insulating pads are bonded to the bottom of the heads.

Abstract: The cap according to the invention has a base plate and a side wall and in the base plate, openings are formed for accepting the glass body or bodies of the lamp envelope. Optionally, a partition is placed between the side wall and these openings. The essential feature of the invention is that the cap has, in its inner space bordered by the side wall, or optionally by the partition, components extending to at least one opening and bordering a smaller space at its side, the smaller space being intended to accept an adhesive and is also bordered by some portion of the base housing.

Abstract: An input signal buffer amplifier that has a high gain and a low offset voltage is implemented as an integrated circuit (IC) along with other components that perform further processing on an input signal. In one embodiment, the buffer amplifier includes first and second operational amplifiers (op amps). Voltage divider resistors R1 and R2 are connected in series between a positive voltage supply rail and a ground rail of the IC. The positive input terminal of the second op amp is electrically connected to a node between resistors R1 and R2. A feedback loop is established from the output of the second op amp to its negative terminal. The negative terminal of the first op amp is connected to a node between a series-connected input resistor and feedback resistor. The positive input terminal of the first op amp is connected to a node between series-connected voltage divider resistors R3 and R4 which are connected across the output of the second op amp and the ground rail.

Abstract: A method is disclosed for operating an electron beam physical vapor deposition apparatus including a vacuum chamber containing an ingot disposed in a crucible, a workpiece disposed above the ingot, and an electron gun for emitting an electron beam to melt and vaporize the ingot to disperse vapors for deposition coating of the workpiece. The method includes directing a primary electron beam with a primary beam focus in a primary scanning pattern across a top surface of the ingot to melt and vaporize the ingot and develop an ingot melt pool floating atop an underlying ingot substrate. A secondary electron beam is superimposed across the ingot top surface in conjunction with the primary electron beam. The secondary electron beam has a secondary beam focus in a secondary scanning pattern to locally and transiently increase vaporization rate of the melt pool.

Abstract: Compatibilized blends of poly(phenylene ether) resins and polyester resins are provided from nucleophile containing poly(phenylene ether) resins and polyester resins and compatibilizer compounds to afford articles having good impact, ductility and tensile properties. The compositions may further comprise impact modifiers, metal salts, reinforcing agents, flame retardants and flow promoters. Articles made from the compositions are useful for automotive components.

Abstract: An improved anode assembly for an x-ray tube is described herein. The assembly includes:(a) a target having a central cavity formed therein;(b) a tubular stem for connection to the target to form a target/stem assembly;(c) an insert within the central cavity, shaped to receive a portion of the stem, and comprising a niobium-based alloy; and(d) a rotor body assembly adapted for connection to the target/stem assembly and rotation therewith.X-ray tubes which incorporate such an anode assembly are also described, as are methods for bonding a target to a tubular stem for use in a rotating x-ray tube.

Abstract: A sequential catalysis of the ring opening polymerization of cyclic organosiloxanes using a base catalyst that can be neutralized by a subsequent redistribution and condensation catalyst such as a Lewis acid catalyst, preferably a phosphonitrilic compound, permits the rapid synthesis of functionalized and poly-functionalized silicone copolymers such as alkenyl hydride copolymers, a new composition of matter.

Abstract: A zirconium-based alloy with a reduced ahoy content is described that has resistance to both uniform and nodular corrosion comparable to present zirconium-based alloy compositions, such as Zircaloy-2. The alloy represents in essence a modified or diluted Zircaloy-2 or Zircaloy-4. The alloys of this invention are also expected to have improved uniform corrosion resistance at under high burn-up conditions The alloy comprises 0.05-0.09 weight percent of iron, 0.03-0.05 weight percent of chromium, 0.02-0.04 weight percent of nickel, 1.2-1.7 weight percent of tin and 0-0.15 weight percent oxygen, with a balance of zirconium. The iron chromium and nickel alloying elements form precipitates in the alloy matrix. The alloy is suitable for use as a cladding material for a fuel element housing fissionable nuclear materials in water cooled nuclear fission reactor.

Abstract: A tool for vertically supporting a shroud repair tie rod assembly having a clevis hook by bracing the clevis hook against a clevis pin installed in a gusset plate. This allows the vertical support at the upper end of the tie rod assembly to be removed, so that the upper support structure can be coupled to the tie rod. The lower end of the tie rod assembly is supported on both sides of the gusset plate. The tool for vertically supporting the lower end of the tie rod assembly is designed to fit in the narrow space bounded by a jet pump diffuser, the gusset plate and the reactor pressure vessel. The vertical support tool includes a pole adaptor for coupling to the end of a service pole, a pole adaptor extension having one end connected to the pole adaptor, a mounting block connected to the other end of the pole adaptor extension, and a hydraulic spreader mounted on the mounting block. The hydraulic spreader opens in response to actuation of a hydraulic cylinder.

Abstract: The present invention, in one form, is a system for modulating x-ray tube current as a function of gantry angle and slice location in a computed tomography system. In one embodiment, a desired noise level for a final image is selected, and a desired minimum x-ray photon reading and a desired average x-ray photon reading are identified to produce an image in accordance with the desired noise level. During scanning, actual x-ray photon readings are used with the desired average x-ray photon reading and the desired minimum x-ray photon reading to generate an x-ray modulating factor. This modulating factor is then used to modulate the x-ray tube current.

Abstract: A turbine blade includes an airfoil having opposite first and second sides and an internal passage extending longitudinally therebetween. A plurality of turbulator ribs extend from the first side into the passage and have substantially identical configurations including first and second ends having a span axis extending therebetween, first and second sides having a width therebetween, and a base and a tip having a height e measured therebetween. The passage includes a height H for defining a rib-to-passage height ratio e/H. Adjacent ribs are spaced apart at a longitudinal spacing S for defining a rib spacing-to-height ratio S/e. The rib configuration varies along the span axis between the rib first and second ends for correspondingly varying at least one of the ratios e/H and S/e to effect a varying convective heat transfer enhancement along the rib span axis for increasing enhancement and reducing cooling airflow.

Abstract: A gas turbine engine includes a controller configured for controlling combustor lean flameout. The engine includes a compressor joined to a turbine by a core rotor, with a combustor disposed therebetween for receiving compressed air and fuel for generating combustion gas discharged to the turbine. The controller is configured for reducing fuel flow to the combustor in response to speed of the core rotor and pressure of compressed air entering the combustor to decelerate the core rotor while preventing lean flameout in the combustor.

Abstract: A gas turbine blade includes an airfoil having first and second sides and an internal passage extending longitudinally therebetween for channeling air to cool the airfoil. A plurality of longitudinally spaced apart primary turbulator ribs extend into the internal passage from at least one of the first and second sides. An auxiliary turbulator rib is spaced between adjacent ones of the primary ribs. The auxiliary rib has a height which is less than the height of the primary ribs for augmenting convective heat transfer enhancement with reduced pressure loss, and, therefore, reduced cooling air requirements.