Abstract: Portland cement particles having the characteristics of slow hardening is oduced by a process of heat treating portland cement particles in the temperature range from 1500.degree. to 3000.degree. C. for from 0.5 to 10 seconds and cooling to obtain particles containing an amorphous, glassy shell as an outside layer.

Abstract: Current state-of-the art injection methodologies for bipropellant engines ly on either impingement or turbulence to mix the fuel and oxidizer streams. The multiple impinging stream vortex injector combines both mixing schemes into a single injector. Both first stage mixing at point of impingement and second stage mixing or turbulent vortex mixing is accomplished by impinging momentum balanced, tangentially injected propellant streams onto one another. The impingement angles are calculated to yield a resultant stream vector that consists of only a tangential velocity component. The two stages of mixing results in increased engine performance and combustion efficiency.

Abstract: An optically controlled MESFET semiconductor oscillator assembly having a MESFET semiconductor which, when voltage biased by a pulsed dc voltage, oscillates at a free running frequency; an optical signal delivery system, such as a light intensity modulator connected to optical fibers; and other oscillator circuitry including a pulse generator. In operation, the pulsed free running oscillation of the MESFET semiconductor can be injection locked to the intensity modulated optical signal delivered via the optical signal delivery system.

Abstract: An optical fiber is releasably held in coil or skein form by a magnetized in film coating on the fiber. Adjacent convolutions are held together by a magnetic field to prevent unintended unravelling of the coil, but the fiber can be rapidly played out at high speed without rupture and with a constant release tension force. The magnetic field has a radial and axial component relative to the coil cylinder. A magnetizing apparatus is disclosed for magnetizing the film. A sensor feedback loop can dynamically adjust the reel-out drag force to dampen vibration modes during reel out which can cause tangle.

Abstract: An armor unit for protecting coastal, river, lake, and reservoir banks, shorelines, and other structures from the damaging hydrodynamic forces of waves and water currents. The armor unit has a central elongate member having a longitudinal axis and first and second outer elongate members connected with the central elongate member on opposite sides thereof. The first and second outer elongate members have parallel longitudinal axes extending normal to the longitudinal axis of the central elongate member. The elongate members may each have an octagonal cross section decreasing from an intermediate portion toward the opposite ends. When a plurality of units are interlocked to define a protective array, a high degree of wedging is afforded between the octagonal members.

Abstract: A hypergolic fuel formulation which is consistently hypergolic with inhibd red fuming nitric acid is comprised of diethylethanolamine from about 44-72 weight percent, triethylamine from about 11-18 weight percent, and carbon from about 45-10 weight percent The formulation can be gelled with: silica, clays, carbons, or swellable polymers. The gellants can be combined with chemical agents that stabilize the gel under the standard 30 minute, 500 g centrifuge stability test. A preferred combination comprising diethylethanolamine in an amount of about 44 weight percent, triethylamine in an amount of about 11 weight percent, and carbon in an amount of about 45 weight percent when tested at an oxidizer/fuel ratio of about 4.25 reveals theoretical performance values of specific impulse (ISP) of about 250 at a chamber pressure of 1000 Psi and a density specific impulse (D* ISP) of about 350.

Abstract: This invention relates to a composite electrode material for use in high rgy and high power density electrochemical capacitors, and to the electrochemical capacitor containing the electrodes. The electrodes are comprised of materials with high specific capacitance and electronic conductivity/high porosity. Specifically, the electrode is comprised of RuO.sub.2.xH.sub.2 O powder and carbon black or carbon fiber.

Abstract: A load securing and releasing system for releasably attaching two objects gether, one of the objects preferably being a parachute. The secure and release system having a main load carrying component with a first end portion and a second end portion, a secure/release mechanism for securing the end portions together and for releasing the end portions. The secure/release mechanism being made up of plurality of interlocking members which provide a substantial mechanical advantage to the system. The system further includes a closure member for securing the interlocking members together. A detachment component is operably connected to the closure member for detaching the closure member from the interlocking members. By proper interrelationship of the interconnecting members the objects are secured together until such time when the detachment component is activated and the objects are thereby released.

Abstract: An improved chaff in which a plurality of metallic or metallic coated elets are joined as chain links that, when deployed, produce microarcs when the link elements make and break contact with each other in an electromagnet field such as that created by a high power radar transmitter. These microarcs will then in turn create current spikes that will reflect a radar signal that has a wider bandwidth than conventional chaff, so as to make it more difficult to distinguish the chain link chaff from a fast moving target such as an aircraft.

Abstract: System and modifications are presented which allow existing artillery and rtar projectile proximity fuzes to have a near-surface burst (NSB) option enabling low height of bursts ranging between one and three meters. The additional circuitry needed to implement this NSB into an existing fuze is a single operational amplifier. The velocity of the fuze is calculated by the micro-controller counting the number of Doppler cycles over a pre-determined sample period of time. Thereafter, using the fuze velocity, the delay time needed for a NSB detonation is computed.

Abstract: A buried pipe detection device based upon the principle of sensing of difences in the dielectric/conductive properties of the ground in the vicinity of the pipe is disclosed. Because the electrical properties of the ground directly over the buried pipe will differ from those of an area immediately adjacent to the pipe, the detection principle is embodied in a capacitor plate array that injects a low frequency sinusoidal signal into the ground and samples the injected signal from two spatially separated locations on the array. The capacitor plate array has two injector/sensor plates that form a capacitively coupled impedance bridge with the ground and a third plate to establish circuit ground. The injector/sensor plates sense changes in the ground path impedance directly beneath the plates as the array is moved along the ground. The outputs of the two sensor/injector plates are then combined differentially and are processed to provide a continuous analog or digital readout.

Abstract: An apparatus is provided for selectively altering the jet pattern produced y a shaped charge round upon detonation by selectively providing confinement mass(es) on the surface of an outer casing of the round. Confinement mass(es) may be provided to induce a tamping effect upon detonation of the round. The placement of the confinement mass(es) relative to one another and to the round may produce different resulting jet patterns upon detonation. The mass(es) may be movable or removable such that the round may be configured to produce different jet patterns in the field or prior to targeting. Coherent or diffused jet patterns may be utilized, for example to penetrate armor of differing thicknesses or to alter the damage area created by the round.

Abstract: A ferroelectric phase shifting antenna array consists of a plurality of lrally spaced antenna patches which have respective ferroelectric components abutting an edge of each patch at a near central location on the edge to provide impedance matching. DC control power lines are connected to the center voltage null position of the resonant mode of the antenna patch. An Rf source is connected to the other ends of the ferroelectric components through quarter wave coupled lines which provides simultaneous impedance matching and DC isolation.

Abstract: There is disclosed a process for encapsulating a preform of arbitrary size and shape for the purpose of manufacturing a body by means of hot isostatic pressing. The preform is encapsulated with glass using a sol gel technique. The glass initially forms a hard, porous layer. Heating the glass in the hot isostatic press results in the formation of a gas-impermeable capsule around the preform.

Abstract: A device for measuring soil pore-air pressure in a high shock environment characterized by a shock resistant housing containing a plurality of pressure sensing ports with sintered metal filters mounted therein which filter fine soil particles, withstand high pressure shock, and permit high air flow. When the device is installed in the ground and an explosive is detonated nearby, soil particles are filtered from the air blast by the sintered metal filters, thereby enabling the device to provide accurate pore-air pressure measurements.

Abstract: A chemical protective fabric for use in garments worn by persons in a cheally hostile environment comprises a layer of felted foam impregnated with superactivated carbon, a polyurethane emulsion binder for bonding the superactivated carbon to the foam, a first stretchable material layer bonded to the layer of foam on a first of the major surfaces thereof, and a second stretchable material layer bonded to the layer of foam on a second of the major surfaces thereof.

Abstract: A ground condition monitor includes a housing for disposal underground, a power source disposed in the housing, and a controller disposed in the housing and in communication with the power source and with a plurality of sensors. The sensors are adapted to receive signals from the controller and in response thereto to send electromagnetic excitation signals into surrounding earth, receive reflective electromagnetic signals from the surrounding earth, and feed the reflective signals to the controller, which is adapted to convert the reflective signals to data indicative of electromagnetic properties of the surrounding earth, and to transmit the data.

Abstract: Vaccine formulations for inducing protective immune response to Hantaviruses in humans are disclosed. These formulations include an attenuated vaccinia virus vector containing cDNA's encoding Hantavirus nucleocapsid N protein, G1 and G2 glycoproteins. Methods for the use of these formulations also are disclosed.

Abstract: The disclosed innovative, interceptor seeker discriminator system has the capability to home in on targets containing nuclear materials by detecting the gamma fissions. The gamma signatures can be obtained from activating the nuclear material by a Neutral Particle Beam Weapon, or by detecting the natural fission emissions of the warhead. This system is innovative, in that the following properties are identified: 1) This system uses interactive discrimination techniques, which allows the gamma seeker to accurately home in on a true RV by comparing the return gamma emissions of objects. In this manner, the gamma seeker discriminator is expected to obtain substantially better discrimination K factor performance, when compared to using only IR techniques. 2) This system uses an interceptor/seeker to perform interactive discrimination and gamma sensors in conjunction with infrared sensors on the same interceptor platform (i.e., sensor fusion).

Abstract: A sealed metal ammunition container for holding at least one round of ammtion. The container body is sized to hold the ammunition and has an opening at one end thereof. A metal bottom flange is fixedly attached to file container body at the one end and includes an opening therein sufficiently large to vent pressure from ignited energetic contained therein. A metal top flange is provided for attachment to the bottom flange, the top flange also having a similar opening therein. A fuse formed from a material having a melting point below the ignition temperature of the ammunition is positioned between the top flange and the bottom flange to form a meltable closure at the open end of the body. A rubber flange gasket is positioned between the bottom flange and the fuse to form a hermetic seal when compressed upon closure thereof. Equally spaced screws mount the top flange, fuse, and flange gasket to the bottom flange to form a hermetic seal.