Abstract:This Phase I study will show the feasibility of ultrahigh-pressure wagerer coke removal and laser-optic inspection for the renewal of jet engine fuel tubes and manifolds. Ultrahigh-pressure, 55,000 psi, pure waterjets offer significant advantages as the basis for a new coke removal method for… more
Abstract:This proposal addresses the development of a versatile, low-cost tool and techniques for its application to the repair of composite materials in jet engine components. This tool will consist of a waterjet, abrasive-waterjet, or an abrasive suspension jet. The repair process may include several… more
Abstract:Stereoscopic imaging is a powerful technique that can provide (1) 3D visual inspections (for both surface and interior features), (2) 3D measurements, and (3) 3D defect algorithms. We propose a PC-based microelectronics inspection system that takes advantage of not only stereo imaging, but also… more
Abstract:Rapid Metal Fabrication (RAMFAB) is a technique in urgent need of development. Since the introduction of rapid prototyping (RP) systems such as StereoLithography and Fused Deposition Modeling for creating non-metallic prototype parts of arbitrary geometry, manufacturing industries have been waiting… more
Abstract:This project will investigate the feasibility of alloying MoSi, to improve its low temperature ductility and fracture toughness without degrading its oxidation resistance and creep strength while maintaining a similar density. The project objective is to lower the brittle-ductile transition… more
Abstract:The U.S. Army uses millions of threaded components in its weapon systems, many of which are nonstandard or Class III Safety Critical and therefore must undergo rigorous dimensional quality control. The inspection of threaded parts using conventional surface-contacting gauges is costly,… more
Abstract:The proposed study will evaluate the feasibility of using an optical sensor (structured lighting/image processing) to detect gap and tape/tow widths for automated composites fabrication processes such as tape laying, tow placement, and filament winding. The sensor will serve as a real-time,… more
Abstract:Novel true-time-delay optical beamforming networks for phased array antennas are devised using nonlinear high efficiency grating technology for free space switches. The switchable gratings are formed using nonlinear volume phase diffraction grating composites. The resulting optical time delay… more
Abstract:This software development project will produce, disseminate, and support an important class of numemodeling resources for NIH-funded, academic bioengineering research groups. The suite consists of 3Ddifference computer modeling codes for ultrasound propagation and scattering, piezoelectric… more
Abstract:NONDESTRUCTIVE TESTING, IDENTIFICATION, AND REPAIR OF WELD DEFECTS HAVE BEEN DOCUMENTED TO CONSUME AS MUCH AS 25% OF THE TOTAL WELD PRODUCTION COST IN PIPELINES, SHIP FABRICATION, AND POWER GENERATING SYSTEMS. INFRARED SENSOR CONTROLLED WELDING SYSTEMS HAVE BEEN DEMONSTRATED THAT WOULD GREATLY… more
Abstract:The objective of this research is to improve the efficiency of kidney dialysis. Efficiency of massdetermined by clearance rate across the membrane. One of the primary restrictions to clearance is thcondition at the membrane surface which exists in either tube or channel. The aim is to increase… more
Abstract:We will design, package, and evaluate active electrodes that are reliable and easily applied withoupaste and abrasive skin preparation. They will be used for EEG monitoring, especially for steady sta(SSEP) measurements in pediatric patients to estimate their sensory thresholds. An electronic… more
Abstract:We will isolate a temperature sensitive mutant of streptavidin that will bind biotin at 4C but notbe accomplished by chemical mutagenesis to saturate the streptavidin gene with mutations. A scheme ftemperature sensitive mutant will be employed. The library of mutants and the enriched library… more
Abstract:Electronic assemblies used in modern weapon system can only be tested by using computer controlled automatic toot equipment (ATE). Complex software routines known as test programs are used with the ATE to control the testing process. A different test program is required for each item to be tested.… more
Abstract:In recent years, computers have made dramatic contributions to the independence of people with disaBecause many people with physical disabilities are not able to use a keyboard or a mouse, a varietydeveloped which provide alternate methods of controlling computers. The usefulness of these… more
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