Abstract: Oxyallyl pendent polymer system having repeating units of the formulae hereinafter referred to as structure A, wherein x has a value of about 0.1 to 1.0 and y has a value of 1.0-x, and hereinafter referred to as structure B, wherein the sum of p+q has a value of about 0.1 to 1.0, r has a value of 1.0-(p+q) and the molar ratio of p:q is about 9:1 to 1:9, wherein Bz is a benzazole unit selected from the group consisting of wherein X is —O—, —S— or —NH—, and R is selected from the group consisting of and wherein Ar is an aromatic group.

Abstract: A method for the preparation of 2-aminomuconate which comprises adding 2-aminophenol to a mixture of 2-aminophenol 1,6-dioxygenase, 2-aminomuconic semialdehyde dehydrogenase and NAD+ (nicotinamide adenine dinucleotide, oxidized form) in a buffer, and recovering a fraction containing 2-aminomuconate from the mixture.

Abstract: An accurate, low-cost, non-contact strain measuring method and apparatus for measuring strain in low modulus porous materials using optical microscopy are described wherein, in a preferred embodiment of the invention, fluorescent ink reference lines are applied to a surface of a specimen, the specimen is mounted on the stage of an optical microscope having an attached x-y digital micrometer, and a load is applied to the specimen. The surface is viewed using a light source that renders the reference lines visible, and changes in displacement of selected points on the reference lines are measured for each incremental loading. Poisson's ratio may be calculated from the strain measurements in two orthogonal directions.

Abstract: A friction damped turbine blade is disclosed. The turbine blade is formed of segments configured so as to form an assemblage corresponding to the airfoil shaped body. Each of the segments is in slidable contact with an adjacent segment. During turbine operation, the segments rub against one another due to the stresses placed on the blade, imparting frictional damping to the turbine blade.

Abstract: A laser energy window arrangement especially usable in a tactical aircraft having night vision equipment-aided cockpit visual information input requirements. The laser energy window arrangement enables use of laser apparatus directed external to the aircraft for target designation or other purposes while minimizing the amount of energy from such laser returning spuriously inside the cockpit where it inherently acts a noise signal for night vision equipment. The laser energy window limits the portion of the aircraft windshield or canopy exposed to laser radiation and its effects to a relatively small area, an obscurable area generating significantly reduced amounts of spurious return energy in comparison with use of the laser directly through an unlimited windshield, canopy, or other type of transparency.

Abstract: A gas turbine engine structure is described wherein the compressor region and the turbine region of the engine are disposed substantially concentrically of each other between fixed inner and outer casings, with the combustor disposed at one common end of the compressor and turbine, and wherein the rotor components of the engine include one or more rings, bands, housings or casings with the turbine blades and compressor blades mounted respectively on the inner and outer surface thereof, and wherein the compressor and turbine stator components are mounted respectively on the inner surface of the outer casing and the outer surface of the inner casing, or, alternatively, wherein the turbine and compressor stator components are mounted respectively on the inner surface of the outer casing and the outer surface of the inner casing, which structure geometries eliminate much of the weight associated with the disks and interconnecting shafts that characterize conventional engines.

Abstract: A finned heat exchanger is disclosed. The heat exchanger includes a unitary fin array with a multiplicity of fin banks. Each of the fin banks include a plurality of raised, folded fins for heat transfer. The fin banks extend in a transverse direction and are spaced apart in a longitudinal direction. The fin banks are retained within the fin array by looped expansion turns. The fin array is mounted on a dielectric substrate base. A closed flow channel for directing a flow of coolant is created by adding a cap to the substrate base.

Abstract: An efficient neural network computing technique capable of synthesizing two sets of output signal data from a single input signal data set. The method and device of the invention involves a unique integration of autoassociative and heteroassociative neural network mappings, the autoassociative neural network mapping enabling a quality metric for assessing the generalization or prediction accuracy of the heteroassociative neural network mapping.

Abstract: Benzobisazole polymers having repeating units of the formula wherein Z is wherein X is —S—, —O— or —NH—.

Abstract: A ruggedized ultra high radio frequency antenna disposable at the rear of a hardened target penetrator warhead is provided. The antenna is usable for communicating signals from a transmitter in a deployed target penetrator warhead to a local repeater where retransmission to a more remote location can occur. The antenna includes a length-shortening and penetration abuse-resistant dielectric embedding material also supporting the subterranean signal communication to the local repeater function. Antenna radiating element fabrication from porous material such as screen wire and use of the dielectric material in a manner providing large G force tolerance and external dielectric variations are included.

Abstract: A micromechanical electrical systems (MEMS) metallic micromachined electrical switch usable on the die of an integrated circuit and inside the integrated circuit package for controlling radio frequency signal paths while incurring desirably small signal losses. The switch is of the single pole single throw mechanical type with provision for grounding one open-switch position node in the interest of limiting capacitance coupling across the switch in its open condition. Cantilever beam switch element suspension is included along with normally open and normally closed switch embodiments, electrostatic switch actuation and signal coupling through the closed switch by way of capacitance coupling. Low loss radio frequency operation above one gigahertz in frequency is provided.

Abstract: Allyl pendent benzazole polymer system having repeating units of the formula: wherein Bz is a benzazole unit selected from the group consisting of wherein X is —O—, —S— or —NH—, and R is selected from the group consisting of wherein Ar is an aromatic group; and wherein x has a value of about 1.0 to 0.1 and y has a value of 1.0−x.

Abstract: Provided are novel, electropolymerizable monomers of the formulae: wherein R1,R2 and R3 are selected from the group consisting of —H, —O(CH2)nCH3, wherein n has a value of 0 to 11 and m has a value of 1 to 4, and wherein no more than one of R2 and R3 is —H. Also provided are polymers resulting from the electropolymerization of these monomers.

Abstract: A programmable automated turbidimeter/colorimeter system for accurately measuring growth among multiple bacterial specimens is described which in a preferred embodiment includes a motor driven rotatable carousel assembly disposed within an aluminum housing, the carousel assembly including a plurality of evenly spaced peripheral holes for receiving a corresponding plurality of disposable culture test tubes, a light source and a light detector disposed in spaced confronting relationship to each other whereby the culture tubes pass therebetween, and a signal amplifier and a recorder for recording optical densities of each specimen as the carousel is continuously rotated. A concentric magnetic shield may be disposed on one side of the carousel for shielding experimental specimens from control specimens in measurements of magnetic effects on the cultures.

Abstract: A reception simplified, reduced cost spread spectrum transceiver device and method. The transmitting portion of the transceiver antipodally modulates a pseudorandom code and non-antipodally modulates binary bit data onto a carrier wave. The receiving portion of the transceiver performs a mathematical squaring function on the received signal combination of pseudorandom code and data. Squaring the pseudorandom code results in a cancellation of the code and the data remains in the absence of the pseudorandom code. The device and method of the invention eliminates the need for storing or generating a local reference for the spreading code or the need for any knowledge of key signal parameters at the receiver greatly simplifying receiver circuitry and allowing receiver operation at low energy density and low operational cost. Additionally, the device and method of the invention eliminates the synchronization constraint between the transmitted data and spreading code of conventional systems.

Abstract: A wholly aromatic copolyester having repeating units of the formula: wherein Ar1 is wherein Q is selected from the group consisting of —H, —CH3, —CF3, —Cl, —Br, and —C6H5; wherein Ar2 is selected from the group consisting of wherein X is selected from the group consisting of —Br, —Cl, —CH3 and —C6H5; wherein Ar3 is wherein Ar4 is selected from the group consisting of wherein m has a value of 0.05 to 0.95 and n has a value of 100-m, is characterized by accessible nematic-isotropic transition temperatures providing outstanding orientational order and mechanical properties.

Abstract: Multi-dimensional, non-linked method and apparatus for producing a simulated feeling of force on a preselected location on a human operator in a synthesized environment accomplished by generating a first, constant, stationary electromagnetic field and a second, varying electromagnetic field local to the human operator. The variance of the second electromagnetic field is controlled by electrical currents which are responsive to parameters describing the position and orientation of said preselected location on the human operator and such variance results in attraction and repulsion of the first and second electromagnetic fields emulating a feeling of force on the human subject.

Abstract: A twin spool counter-rotating turbofan gas turbine engine having a counter-rotating fan module integrated with the high pressure compressor and driven by a counter-rotating turbine utilizing only two drive shafts. The two drive shafts are aerodynamically coupled and rotate in opposite directions relative to each other with or without the use of a gearbox. The integration between the fan module and high pressure compressor allows the fan blade rows to operate at the same mechanical speed of the high pressure compressor blade rows. An afterburner module may be added to the present invention to provide thrust augmentation.

Abstract: A spark plug system for measuring the thermal profile across the surface of a piston in an operating internal combustion engine in characterizing the combustion process within a combustion chamber of the engine is described that includes a specially constructed spark plug containing a coherent fiber optic bundle and lens system optically connected to a remote sensing thermometer and high-speed triggerable imaging infrared video camera.

Abstract: Corrosion resistant non-polar polymer coatings and method for applying the coatings to substrates is described, wherein a source of non-polar polymer powder is deposited as a coating onto the surface of a substrate by high temperature thermal spray, wherein the non-polar character of the powder and any additives thereto is substantially preserved during the high temperature thermal spray by using a mixture of a non-oxidizing shielding gas or reducing gas, or combination of the two, at one or more locations along the thermal spray to displace or react with ambient oxygen.