Abstract: A system and computer implemented method for enabling field service of machines and training of field service personnel. The method comprises the steps of generating at least one validated sequence of instructions for at least one maintenance task and delivering the at least one validated sequence for use in performing the at least one maintenance task.

Abstract: A fuel nozzle device suitable for use in a gas turbine engine or the like is provided. The fuel nozzle device includes a fuel line and a plurality of gas orifices disposed at a downstream end of the fuel line, the plurality of gas orifices operable for injecting fuel into an air stream. The acoustic resistance of each of the plurality of gas orifices is chosen to match the acoustic impedance of the fuel line such that the maximum acoustic energy may be transferred between the fuel nozzle device and the combustor, thus enhancing the ability of the fuel nozzle device to control the combustion dynamics of the gas turbine engine system. A fuel injection resonator assembly suitable for use in a gas turbine engine or the like is also provided. The fuel injection resonator assembly includes a plurality of orifices separated by a variable length tube.

Abstract: A method for repairing an article made of a fiber-reinforced ceramic matrix composite comprises attaching sections of a fiber-reinforced tape to the damaged area and then infiltrating the sections with the ceramic matrix or ceramic matrix precursor material. The material around the damaged area may be removed first to form a depression that is then filled with sections of the fiber-reinforced tape and further infiltrated with the ceramic matrix or ceramic matrix precursor material. The repaired article shows stress-strain curve similar to a defect-free article.

Abstract: An apparatus for cathodic arc coating. The apparatus includes: a vacuum chamber which includes: an anode; a power supply; and a cathode target assembly connected to the power supply. The cathode target assembly includes a cathode target having an interference fit stud with a threadless distal end. In the preferred embodiment, the distal end of the threadless cathode target also includes a pre-determined surface texture and a cooling block in contact with the cathode target.

Abstract: A photodiode device includes a silicon carbide photodiode including a second semiconductor layer on a first semiconductor layer and an integral aluminum gallium nitride filter on the second semiconductor layer. A method for fabricating a photodiode device for combustion flame temperature determination includes fabricating an integral filter over a silicon carbide photodiode. Examples of various filter fabrication techniques include growing an aluminum gallium nitride filter, fabricating a silicon oxynitride filter, and alternating thin film layers of silicon oxide and silicon nitride.

Abstract: In energy management system is provided for a power generating device having a working fluid intake in which the energy management system comprises an electrical dissipation device coupled to the power generating device and a dissipation device cooling system configured to direct a portion of a working fluid to the electrical dissipation device so as to provide thermal control to the electrical dissipation device.

Abstract: Copolymers of polycarbonates or polyarylates with polyether polymers such as polyethersulfones, polyetherketones, and polyetherimides are prepared by reaction of the polyether polymer-forming reagents, e.g., bisphenol A disodium salt and bis(4-chlorophenyl) sulfone, in the presence of the polycarbonate or polyarylate. The reaction may take place in a dipolar aprotic solvent, or in a water-immiscible aromatic solvent in the presence of a phase transfer catalyst, preferably a hexaalkylguanidinium halide. Hydroxy-terminated polyether oligomers may be produced from the copolymers by saponification of carbonate or ester groups.

Abstract: Regeneration controller and method for controlling regeneration of a water softener are provided. The controller includes a water meter configured to output a signal indicative of the volume of influent water received by the water softener. A water-hardness indicator, such as a conductivity meter or ion-selective electrode, is configured to output a signal indicative of a degree of hardness of the influent water. A processor is coupled to receive the respective signals from the water meter and the hardness indicator. The processor is further configured to calculate a value indicative of the total level of hardness removed by the water softener. A comparator is coupled to receive a signal indicative of the quantity of resin capacity of the water softener. The comparator is further configured to receive the value indicative of total hardness to issue a regeneration command based on comparing the resin capacity relative to the value of total hardness.

Abstract: Acicular bodies of a metal compound are produced by slowly precipitating an organic salt of the metal from a solution of an ester of a dicarboxylic acid having 1-5 carbon atoms and firing the precipitate in an oxidizing atmosphere. These acicular bodies have a cross-sectional dimension less than about 20 &mgr;m and are useful for providing reinforcement of a larger ceramic body. Acicular bodies of rare-earth metal oxides also are useful in reinforcing x-ray scintillator bodies without diminishing their luminescent capacity.

Abstract: A coated ferromagnetic particle comprises a ferromagnetic core and a coating. The coating comprises a residue resulting from a thermal treatment of a coating material comprising a polymer selected from the group consisting of polyorganosiloxanes, polyorganosilanes, and mixtures thereof. A composite magnetic article comprises a compacted and annealed article of a desired shape. The composite magnetic article comprises a plurality of coated ferromagnetic articles. Each coated ferromagnetic particle comprises a ferromagnetic core and a coating. The coating comprises a residue resulting from a thermal treatment of a coating material comprising a polymer selected from the group consisting of polyorganosiloxanes, polyorganosilanes, and mixtures thereof.

Abstract: Epoxy resin compositions are disclosed which comprise (A) at least one cycloaliphatic epoxy resin, (B) a curing agent comprising hexahydro-4-methylphthalic anhydride, (C) at least one a boron containing catalyst that is essentially free of halogen, and (D) at least one cure modifier. The encapsulant (11) may also optionally comprise at least one of ancillary curing catalysts, thermal stabilizers, UV stabilizers, coupling agents, or refractive index modifiers. Also disclosed are packaged solid state devices comprising a package, a chip (4), and an encapsulant (11) comprising an epoxy resin composition of the invention. A method of encapsulating a solid state device is also provided.

Abstract: A phosphor composition that comprises at least one phosphor emitting in each of the blue, green, and red regions of the visible spectrum is disposed adjacent to a backlight source of a color liquid crystal display. The phosphor composition emits strongly in the wavelength ranges of color filters used in such display. The backlight source includes either a semiconductor light-emitting diode or an organic light-emitting device.

Abstract: An ultra-wideband (UWB) communications system combines the techniques of a transmitted reference (TR) and a multiple access scheme called delay hopping (DH). Combining these two techniques using UWB signaling results in a penalty in signal-to-noise ratio (SNR) over conventional pulse position modulation (PPM) techniques but avoids the synchronization difficulties associated with conventional approaches. The signaling pulse waveforms are designed to insure that their power spectral densities, after any frequency translation to the center of an operating band, are essentially spectrally disjoint with frequencies that must be protected. This TR technique is combined with the DH multiple access technique to create a UWB communications scheme that has a greater multiple access capacity than does the UWB TR technique by itself.

Abstract: Phosphors comprises oxides of at least an alkaline-earth metal selected from the group consisting of strontium, barium, calcium, and combinations thereof and at least a Group-IIIB metal selected from the group consisting of aluminum, gallium, indium, and combinations thereof activated with rare-earth metal ions comprising at least europium. The phosphors are characterized in that the ratio of positive ions and negative ions is off-stoichiometric. The phosphors are excitable efficiently in the near UV-to-blue light range. Blends containing at least one of these phosphors in conjunction with at least a light-emitting diode can provide light sources having a high luminosity and a high color-rendering index.

Abstract: A photodetector comprising a gallium nitride substrate, at least one active layer disposed on the substrate, and a conductive contact structure affixed to the active layer and, in some embodiments, the substrate. The invention includes photodetectors having metal-semiconductor-metal structures, P-i-N structures, and Schottky-barrier structures. The active layers may comprise Ga1−x−yAlxInyN1−z−wPzAsw, or, preferably, Ga1−xAlxN. The gallium nitride substrate comprises a single crystal gallium nitride wafer and has a dislocation density of less than about 105 cm−2. A method of making the photodetector is also disclosed.

Abstract: A method of quantitative non-destructive thermal inspection of an article having at least one internal cavity comprises the steps of inputting physical properties of the article, measuring thermal characteristics of the article, and calculating heat transfer coefficients of the internal cavity.

Abstract: An AC powered light emitting device is provided. The device includes a plurality of organic light emitting diode (OLED) modules. The modules are arranged into groups of modules where the individual modules of the groups are electrically connected in series. The device may be powered using AC power. A display is also provided. The display includes a plurality of OLED modules arranged to spell out a letter or depict an image.

Abstract: Epoxy resin compositions are disclosed which comprise (A) at least one silicone resin, (B) at least one epoxy resin, (C) at least one anhydride curing agent, (D) at least one siloxane surfactant, and (E) at least one ancillary curing catalyst. Also disclosed are a packaged solid state devices comprising a package, a chip, and an encapsulant comprising a composition of the invention. A method of encapsulating a solid state device is also provided.

Abstract: A method for economically producing aromatic carbonates from aromatic hydroxy compounds is disclosed which in one embodiment comprises the steps of: (i) contacting at a temperature sufficient to keep the mixture molten at least one aromatic hydroxy compound with a catalyst composition comprising the following and any reaction products thereof: (A) at least one Group 8, 9, or 10 metal or a compound thereof; (B) at least one salt; (C) at least one metal co-catalyst; and (D) optionally, at least one activating solvent; (ii) optionally heating the mixture at atmospheric pressure to a temperature above that sufficient to keep the mixture molten; (iii) pressurizing the mixture with carbon monoxide; (iv) optionally heating the mixture under pressure of carbon monoxide to a temperature above that sufficient to keep the mixture molten; (v) optionally maintaining the mixture under pressure of carbon monoxide for a time period; (vi) introducing oxygen to the mixture to a desired concentration of oxygen in carbon monoxid

Abstract: Condensation curable poly(fluoroorgano)siloxane-poly(silarylene)siloxane block copolymer compositions having a glass transition temperature not exceeding about −54° C. and excellent solvent resistance have been found useful as sealants. Polyalkoxysilylorgano compounds, such as 1,4-bis[trimethoxysilyl(ethyl)]benzene have been found to be effective as cross-linkers.