Award Data

Cured aircraft composite materials present a particularly difficult challenge for recycling technology. Those materials have mostly thermosetting epoxy matrices and occur in intimate association with metals, paints, and coatings. Current techniques for recycling thermoset composites, mostly for automotive sheet molding compounds (SMC), involve pulverizing the material for use as fillers. Th ...

A novel tertiary recycling process is proposed for investigation as an economical means for recycling shipboard plastic waste. Early development work has shown that this process can convert a wide variety of polymers and composites into low molecular weight hydrocarbons at temperatures below 200'C. The hydrocarbons produced can then be reused as chemicals, fuels, or monomers. Metal, glass, and fil ...

THIS PROJECT WILL PREPARE FOR EVALUATION A MATERIAL WHICH SHOULD DEMONSTRATE SUPERIOR PERFORMANCE IN ABSORBING AND DISSIPATING EXPLOSION SHOCK ENERGY. THE COMPOSITION PROPOSED AND ITS BASIS FOR PERFORMANCE ARE EXPLAINED. SHOCK WAVE TESTING WILL BE UNDERTAKEN; AND BASED ON THE RESULTS, RECOMMENDATIONS WILL BE MADE FOR FUTURE PROJECT DIRECTION.

THE OBJECT OF THE PROPOSED PROGRAM IS TO DEMONSTRATE FEASIBILITY OF DESIGNING HIGH EFFICIENCY TRANSFORMERS OF LOW MECHANICAL PROFILE FOR HIGH FREQUENCY POWER CONVERSION APPLICATIONS. THE PROGRAM WILL BE DIRECTED TOWARD GAINING INSIGHT INTO THE DOMINANT LOSS MECHANISMS OF THE WINDING AND CORE STRUCTURES AT HIGH FREQUENCIES. NEW APPROACHES FOR TRANSFORMER CONSTRUCTION, SUCH AS THE USE OF LAMINATED F ...

THE OBJECTIVES OF THE PROPOSAL EFFORT ARE TO IMPROVE THE RELIABILITY AND TO REDUCE THE FABRICATION COSTS OF SINGLE MODE FIBEROPTICS COUPLERS BY: 1. DEVELOPING THICK, SINGLE MODE WAVEGUIDES WITH IDENTICAL CROSS SECTIONAL PROFILE MATCHING THAT OF SINGLE MODE FIBERS; AND 2. LOCATING THESE FIBERS TO WAVEGUIDES, MADE OF ELECTROOPTIC MATERIAL, USING PREALIGNED ETCHED "V" GROOVES IN A GAAS SUBSTRATE. OUR ...

MULTISPECTRUM GUIDANCE SYSTEMS ARE BEING DEVELOPED WHICH CONTAIN EXTREMELY SMALL, NON-SPHERICAL OPTICAL COMPONENTS FOR LONG WAVELENGTH IR SEEKERS. THE NAVY REQUIRES A NONCONTACT METHOD OF TESTING THESE PARTS FOR CONFORMANCE TO SPECIFICATIONS PRIOR TO THEIR ASSEMBLY INTO THE SYSTEM. APA OPTICS PROPOSES TO DEVELOP AN OPTICAL INTERFEROMETER WHICH WILL USE LOW COST COMPUTER GENERATED HOLOGRAMS (CGH) A ...

WE PROPOSE A UNIQUE ELECTRO-OPTIC LWIR BEAM SCANNING DEVICE. THIS ALXGA1-XN PLANAR WAVEGUIDE BASED ELECTRO-OPTIC DEVICE CAN BE USED EITHER IN A SCANNER OR A RECEIVER CONFIGURATION. IT HAS THE POTENTIAL OF LARGE FIELD OF VIEW (20 DEGREES), FAST RANDOM ACCESS AND LOW POWER OPERATION. THE DEVICE IS BASED ON A UNIQUE COMBINATION OF ELECTRO-OPTIC BRAGG DIFFRACTION GRATING THAT ARE FABRICATED OVER PLANA ...

GaN high electron mobility transistors or HEMTs are proposed for use as high temperature electronic devices. HEMTs are excellent for both power and low noise amplification since they posses a high carrier concentration and an enhanced carrier mobility. GaN has a large bandgap of 3.2 a, which gives it a greater breakdown voltage and a higher saturated electron velocity than GaAs. GaN, in addition, ...

The growing reliance on wireless electronic systems presents us with a need for new diversity antennas for civilian and military platforms. These antennas must take account of platform curvature, material treatments and nearby interactions, all of which affect the antenna performance. To support the development and design of these antennas, a new generation of analysis is required which retains ...

AN ECONOMICAL FRAGMENT LAUNCH SYSTEM IS NEEDED TO DUPLICATE WARHEAD FRAGMENT/AIR TARGET ENCOUNTER CONDITIONS ASSOCIATED WITH MODERN AIR TO AIR COMBAT. THE OBJECTIVE OF THIS EFFORT IS TO PROVIDE A DETAILED CONCEPTUAL DESIGN, INCLUDING BUILDING AND OPERATING COST ESTIMATES, FOR A LAUNCH SYSTEM CAPABLE OF PROJECTING METALLIC, PARALLELEPIPED FRAGMENTS WITH WEIGHTS IN THE RANGE OF 30-250 GRAINS (1.9-16 ...