Abstract: A weakly ionized plasma is generated by continuous high-power microwave win a dielectric cavity positioned in a slow waveguide. Contaminated air under atmospheric pressure is exposed to the plasma within the waveguide cavity for a limited saturation time controlled by inflow at a regulated flow rate. During such limited saturation time, the contaminated air is purified by sequential ionization and recombination under an electron temperature resulting in a microwave discharge plasma dominated by atomic oxygen at a relatively high saturation density level together with atomic nitrogen at a relatively low density level.

Abstract: A system and method are provided for degaussing a vessel moving over an urwater magnetic detector. A location at the vessel residing over the magnetic detector is continuously provided to a controller. The vessel is equipped with a plurality of degaussing coils such that each is independently controllable. Degaussing coil currents are determined by the controller according to a least squares minimization routine such that an off-board magnetic field of the vessel at the location over the magnetic detector is absolute zero. In addition, the determined coil currents minimize the off-board magnetic field of the vessel at all other locations. The determined coil currents are then applied to the appropriate degaussing coils via separate power supplies.

Abstract: A structural laminate of rigid layers separated by very thin layers of vius fluid. The viscous fluid adheres to the confronting surfaces of adjacent rigid layers and is maintained in layered alignment within the laminate to ordinarily prevent flexural vibration and provide vibration overdampening to cope with flexural deforming forces.

Abstract: Flux leakage resulting from interaction between the static bias flux and variable magnetic flux additively applied to obtain magnetostrictive deformation of an active actuator element, is reduced by bias flux of a separate magnetic field perpendicular to the orientation of the additively applied static bias and variable magnetic flux to improve actuator operation.

Abstract: An active electromagnetic influence firing system has transmitter coils and eceiver coils mounted on a single warhead section. One set of receiver coils has vertical look capability for detecting surface ships and another set has 360.degree. look capability for detecting submarines. An influence electronics package automatically nulls out directly induced electromagnetic radiation and passes only the signature received from targets. Amplitude, duration, and frequency criteria implemented by circuitry in the influence electronics package determine whether there is a valid target.

Abstract: Electrical stimuli delivered to cardiac tissue at times determined from a chaos stabilizing algorithm, converts arrhythmia activity to periodic beating by an interbeat interval shortening action, utilizing real time calculation based on a system parameter experimentally determined from intervention by the electrical stimuli.

Abstract: A portable electromagnetic field exposure dosimeter includes a triaxial fite-loaded coil sensor, a group of amplifiers and bandpass filters, a data control board, and a computer. The triaxial sensor receives electromagnetic radiation along three orthogonal axes for measurement which is channelled through a group of amplifiers and then bandpass filtered into three frequency signal ranges. One frequency range corresponds to exposure at 60 Hz and two of its harmonics. The second frequency range corresponds to high frequency pulsed energy. The third frequency range reflects body motion of a tested individual. The data control board converts such filtered signals into digital code and controls the flow of the converted data to random access memory and to the computer. The computer performs a Fast Fourier Transform on the converted data from the 60 Hz frequency range and then stores or displays the analyzed data as a function of frequency and time.

Abstract: Conductive measuring electrodes, of a capacitive probe having a grounded rd electrode positioned therebetween shield a probe circuit, provides mutual capacitance measurements which way as a function of changes in impedance of dielectric material being monitored as it undergoes a curing process. The probe is positioned in non-embedded relation to the dielectric material to form a sensitivity region therein through which an electric field extends between the conductive measuring electrodes of the probe to establish said variable mutual capacitance measurements without extraneous influences.

Abstract: Signal antennae are mounted on the casing wall between forward nose and r tail ends of an aerospace launched vehicle for radio communication through a radiation conducting sheath of plasma formed thereon by atmospheric ionization during descent of the vehicle along a non-gliding reentry path. The reentry path is maintained by vehicle guidance at a steep angle in response to data transmitted to the antennae through the radiation conducting sheath having a plasma content minimized by cooling which is thereby maintained in complete surrounding relation to the vehicle and modulated to enhance data transmission during the entire duration of vehicle descent.

Abstract: Metal heated to a molten state is injected under a high hydrostatic penetion pressure into extremely small and closely spaced channels of an insulating matrix to form an array of electrically conductive pins or wires. The materials for the pins and matrix are selected for compatibility with respect to melting, matrix sintering and surface tension penetration conditions associated with the fabrication of a high density charge transfer device.

Abstract: A slab motor for testing propellant samples (also referred to as a ballistic evaluation motor) having increased insulation and high pressure capability up to 10,000 psi is provided. The slab motor has a steel tube body with steel end caps, the whole assembly being insulated with liners. A test head device is attached to the forward end of the slab motor providing a mount for measuring thrust, two ports for attachment of pressure transducers, a rupture diaphragm to preclude explosive pressure build-ups, and an open port for attachment to the slab motor. A removable nozzle assembly allows easy replacement of the exhaust nozzle attached to the aft end of the slab motor.

Abstract: A method for using a miniscale ballistic test motor for determining burn es over an operating pressure range allows the testing of a small propellant sample. The small propellant sample allows performance of an abbreviated procedure for each test of the propellant sample involving loading of a small scale test motor with the sample, conditioning the test motor and sample therein, firing the propellant sample and recording data.

Abstract: A six-pole band-pass filter system and circuit configured for optimal permance in an associated infrared search and track (IRST) system which outputs data in an analog format is disclosed. The key to the successful operation of the filter is its matching to the impulse response of the associated IRST system. By adjusting certain components in the filter, it can operate as an optimal, linear, one-dimensional device to detect unresolved targets against a severely cloud-cluttered background.

Abstract: A computer interface is provided to support communication between a VMEbus architecture and a computer having its input/output (I/O) interface based on MIL-STD 1397B Type D or E asynchronous serial data specifications. A dual port RAM provides temporary storage for VMEbus data being transferred to the computer and computer data being transferred to the VMEbus. Both the VMEbus data and computer data are stored in a VMEbus parallel format. An interrupt controller is responsive to interrupt control signals on the VMEbus and a local bus. The interrupt controller places a processor interrupt on the local bus in response to an interrupt control signal on the VMEbus, and places a VME interrupt on the VMEbus in response to an interrupt control signal on the local bus. A processor, responsive to the processor interrupt, generates a write control signal and transfers the VMEbus data stored in the dual port RAM onto the local bus.

Abstract: Rigid containers held assembled together form a dispenser from which chaff s dispersed by internally generated pressure when it exceeds a predetermined ejection level to displace and remove a sealing cap from a retention position causing rupture of an associated snap-lock, followed by controlled dispersal of the chaff.

Abstract: Fast neutrons from a moving source are thermalized by travel through water to a soil embedded body of nitrogen-rich material causing emission of gamma rays therefrom. Emitted gamma rays are detected at a location adjacent the neutron source for measurement of radiation energy from which location of nitrogen-rich materials in the soil is mapped, based on a predetermined signature energy level of the measured radiation.

Abstract: An elongated rod made of a shape memory alloy composition having selected eudoelastic properties, is deformed into a dimensionally compact coil for packaged storage under stress maintained by physical constraint. Upon selective removal of the constraint allowing shape recovery, a substantial increase in axial length of the rod occurs in order to improve its performance in various installations, including long rod penetrating projectiles.

Abstract: Incoming signals radiated to an array of antennas are processed within a nal surveillance system by adding signal outputs of two antennas at a common frequency. Separation of the added signal outputs according to frequency and comparison of power level measurement thereof provides signal phase difference data from which frequency and direction of the incoming signals are simultaneously determined.

Abstract: Disclosed is a high-voltage, high-current, multichannel, optically-trigge switch with the potential for improved lifetime of operation. Triggering of the switch is accomplished by ultraviolet illumination of multiple cathode apertures via fiber-optic cables. The trigger optics for each channel, being composed of a fiber-optic cable terminated by some collimating optics, are protected from damaging metalization by enclosing them in an angled metal or dielectric tubes in the cathode backspace. The use of collimating optics at the output of the fiber allows the fiber to be recessed inside the shield tube, providing further protection from discharge by-products.

Abstract: A telephone line selection and accounting system is provided. The system an electronically programmable read only memory (EPROM) database of rate information for each carrier. Upon initiation of a user call, the database is first updated using automatic rate update tones (if available) from each carrier. The database rate information is then used to select the lowest cost carrier. The system provides the capability to connect to a carrier using either distinct lines or local access numbers over a common line. During the call, total elapsed time and cost is displayed at the user phone. Once the call is complete, call accounting information is stored for later retrieval and analysis. In addition to the automatic rate update tones, the rate information database may be updated either by changing EPROMs or by manually entering new rate information from a user phone.