Proposed military optical sensor systems will operate in environments with structured emitting backgrounds produced by nuclear weapon bursts. in general, these optical sensors will operate at non-visiblewavelengths for which there have been no measurements of nuclear produced backgrounds. models of… More

The development of two different three-dimensional (3-d) boundarylayer computer codes and the coupling of these codes to a 3-d supersonic inviscid flow-field code to accurately determine the skinfriction drag for missile configurations that may have air-breathing inlets and fins is proposed. both… More

At present, computers are available with enormous quantities of core storage and extremely fast computational capabilities as compared with computers just a few years old. in the next year or two, even more dramatic increases in memory and computational speed will become available. of importance to… More

A smoke generator incorporating the techniques of liquid vaporization, cryogenic cooling, and microprocessor control will be developed. the smoke generator will be operable under both atmospheric and elevated pressures. liquid vaporization will be achieved by controlled film-boiling. pressurized… More

The complex interrelationship of the end game parameters in air-toair and surface-to-air nonnuclear kill weapon system engagements has tended to limit the analyses performed with stochastic (monte carlo) methods because of the intensive resources required of these methods. these methods are also… More

Early detection of sodium leakage from the pool-type liquid metal cooled reactor (lmr) vessel is an important safety issue. an intrinsically safe and fast means of detection is required for sodium leakage in the gap between the reactor and guard vessels. at the operating pressure and temperature of… More

Dna presently sponsors experimental investigations of non-deal air blast at ernst mach institute (emi), and modeling efforts at nswc. presently, the experimental results, in the form of mach-zehnder interferometer, being both functions of temperature and concentration, cannot be reduced for… More

There exists a need for inexpensive, low frequency (0.001 hz to 50 hz) ultrasensitive vibration detectors. ruggedness, stability, dynamic range, sensitivity and cost all combine to limit in one way or another the use of conventional devices. recent research with the new class of high temperature… More

The feasibility of development of a new long range radioactive plume transport code is proposed. new approaches to estimate the radioactive decay, wet and dry deposition, particulate coagulation, and atmospheric parameters will be explored and a simple, idealized evaluation of these algorithms will… More

The proposed unobtrusive technique for monitoring eye movements and determining the fixation point on the display screen is based on the state-of-the-art real-time image processing system equipped with fast servo-controlled mechanisms for the adjustment of the video camera's focuing, zooming, and… More

Accurate and detailed experimental data such as velocity distribution in complex flow fields at hypersonic speeds arerequired for validation of cfd results. laser velocimetry (lv) has been successfully used in transonic and supersonic flows. application of lv to hypersonic flows requires signal… More

Inspection of painted or coated carbon steel surfaces often involves the removal of the coating prior to inspection, especially when the use of magnetic particle testing (mt) is required. in the case of examination of containment vessel walls in nuclear power plants, the removal is time consuming,… More

The innovative proposed herein concerns the development of a holographic diagnostic technique for the measurement of electron density profiles in the flows over a rv ballistic range model. an experiment is identified in which holographic plasma measurements will be used for refinement and validation… More

Optical effects of nuclear explosions, particularly multiburst interactions and infrared structure due to fireball turbulence, are of current interest. the beau geste experiment data base is unique in including hotwire anemometry, ir video record, and visible light photographs for single and… More

The laser parameters most important to lithography applications are beam quality and laser wavelength. a significant up-grade of arf laser performance in these key areas can be achieved in an alternative system. an unstable resonator cavity in which the excitation lifetime is on the order of 35 nsec… More

Recently, new magneto-optic/eddy current technology has been developed for rapid inspection of cracks initiating near rivets in aluminum aircraft alloys. there is evidence this technology can be developed for rapid detection and imaging of subsurface cracks and corrosion. unconventional eddy current… More

Monolithic implementation of data converters at the 8 bit, 1 giga samples per second level are considered a high priority item for many military and commercial applications, ranging from the mmic/vhsic interface to radar signal processing, electronic countermeasures, and instrumentation. these high… More

Nondestructive inspection for corrosion in aluminum aircraft structures of aging airplanes has been demonstrated recently using magneto-optic/eddy current imaging technology. this technology was developed for rapid inspection of surface breaking cracks near rivets in aluminum aircraft alloys, but… More

Detection and characterization of surface defects on the internal components of propulsion systems is currently done by visual inspection with borescopes. These inspections are subject to many sources of error and uncertainty, making the experience of the inspector a critical factor in the quality… More

Engine Structural Intergrity Program (ENSIP) guidelines specify that many aircraft engine components, which have vastly different geometries from each other, must be inspected rapidly and accurately, with flaw detection requirements ranging from 0.01 to 0.07 inches. Present inspection techniques,… More

The team of Physical Research, Inc. (PRi) and Savi Technology (Savi) propose ASIC integration for an ASIC-based container manifesting tag. Savi and the Navy/Marine Corps have been developing the Radel (Radio Label),, an innovative Radio Frequency Identification (RFID) tag for a Radel-based… More

Conventional NDI methods for surface corrosion are difficult. For example, because magnetic field- gradients associated with surface corrosion in steel are far smaller than those associated with cracks, magnetic-particle methods are ineffective in this context, even on smooth painted-surfaces. … More

Current advanced as well as future electronic data communications and signal processing requirements for military as well as commercial applications need the operations of analog to digital converters (ADCs) with performances beyond that of commercially available designs. In this Phase I proposal,… More

Recent years have seen the size of GPS receivers shrink dramatically due to higher levels of integration. A GPS receiver consists of a combination of RF and IF circuitry, filters, analog to digital converts (ADC) and a digital Signal Processor (DSP) engine. One of the remaining factors preventing… More

Recent years have seen the size of GPS receivers shrink dramatically due to higher levels of integration. A GPS receiver consists of a combination of RF and IF circuitry, filters, analog to digital converts (ADC) and a digital Signal Processor (DSP) engine. One of the remaining factors preventing… More