Abstract:This program will develop a method of growing bulk ternary compound semiconductors of uniform composition. The target material of In(1-x)Ga(x)As was chosen because of its immediate use in the growth and fabrication of very high speed HEMT devices. The method should be applicable to other ternary… more
Abstract:An eight month study is proposed on the fundamentals of a new system of subsurface barrier called Hydrodynamic Enhanced Barrier System (HEBS). The mechanism of HEBS is that it can, via oscillatory motion of working fluids or steady state circulating flow, remove contaminants from groundwater… more
Abstract:THE DEVELOPMENT OF A PORTABLE WIND SHEAR DETECTION AND WARNING SYSTEM (WSDWS) IS PROPOSED FOR IMPROVING THE SAFETY OF AERONAUTICAL MISSIONS DURING TAKEOFF AND LANDING. THE WSDWS WILL BE AN UPGRADED VERSION OF AN EXISTING PATENTED SYSTEM WITH EMPHASIS ON RAPID DEPLOYMENT FOR MILITARY OPERATIONS. THE… more
Abstract:ADVANCED AEROSPACE PROGRAMS REQUIRE MATERIALS CAPABLE OF OPERATING IN TEMPERATURE ENVIRONMENTS EXCEEDING 2000OF. TO ASSESS THE THERMAL AND STRUCTURAL PERFORMANCE OF THESE MATERIALS, TESTING MUST BE PERFORMED AT HIGH TEMPERATURES. NEW TECHNIQUES ARE NEEDED TO MONITOR AND ASSESS MATERIAL PERFORMANCE… more
Abstract:The development of an instrument for mapping the infrared radiance field from interior surfaces of turbine engine exhaust cavities is proposed. The instrument will consist of a cooled, rotating optical head that will traverse along the axis of the engine exhaust, mapping the infrared radiance from… more
Abstract:Projectiles launched at hypervelocities at the ballistic ranges of Arnold Enginering Development Center are subject to extreme loads of over 100,00 g's and occasionally fail. The ultimate material strength, in practice, limits the maximum speed to which the projectile can be launched and still… more
Abstract:HIGH-VELOCITY WATERJETS AND ABRASIVE WATERJETS HAVE BECOME VIABLE PRECISION CUTTING TOOLS FOR AWIDE RANGE OF APPLICATIONS. THIS PROJECT ADDRESSES THE USE OF ARGON LIQUID OR GAS CUTTING JETS FOR FABRICATING THE METAL FUEL PINS USED IN THE PYROMETALLURGICAL FUEL CYCLE OF ADVANCED REACTOR CONCEPTS.… more
Abstract:The proposed study will evaluate the feasibility of adapting medium format metric camera systems for aerial photogrammetry from an unmanned aerial vehicle (UAV) platform. The new generation of UAVs have the capacity to carry medium format (up to 5 cm x 7 cm) metric cameras suitable for precision… more
Abstract:To enhance characterization of the propagation path of assorted Army electro-optical and electro-acoustic devices, a detailed understanding of atmospheric conditions near the ground surface is needed. This proposal concentrates on the effects due to the presence of airborne particles. The… more
Abstract:Microbilogically influenced corrosion (MIC) has been shown to be a leading cause of internal corrosion and failures in marine tubing and piping systems. A technique is proposed to identify and characterize MIC-affected tubing and piping through the use of advancced and cost-effective NDE methods.… more
Abstract:In Phase I of this project, we will investigate the feasibility of adding a "real-time" or "near real-time " stereoscopic imaging capability to the armaments radiographic inspection system already in place at Yuma Proving Ground. We will determine the best way to implement rapid, accurate, and… more
Abstract:TRADITIONAL ROCK CUTTING, CORING, AND METAL CUTTING METHODS HAVE SERIOUS TECHNICAL, ENVIRONMENTAL, AND SAFETY LIMITATIONS FOR UNDERWATER APPLICATIONS. HIGH-PRESSURE ABRASIVE-WATERJET (AWJ) CUTTING IS DEMONSTRATED AS A REVOLUTIONARY TECHNIQUE FOR CUTTING ANY MATERIAL AT OCEAN DEPTHS UP TO 20,000 FEET… more
Abstract:The uncertainty in the magnitude and spatial distribution of concentrated masses internally attached to a shell submerged in an acoustic media is considered. The governing probabilistic equations are derived, and the supporting computer code is developed. The method will result in the statistical… more
Abstract:THE WORK ON TOPOLOGICAL APPROACHES TO IC COMPACTION FROM LEAF CELLS CONSISTING OF LESS THAN A FEW THOUSAND TRANSISTORS TO VLSI CHIPS CONTAINING MILLIONS OF TRANSISTORS IS BEING EXTENDED. TO BE ABLE TO COPE WITH THREE ORDERS OF MAGNITUDE INCREASE IN DATA COMPLEXITY, A COMBINATION OF FACTORS INCLUDING… more
Abstract:THERE EXIST NUMEROUS DEVICES THAT IMPROVE THE PERFORMANCE OR REDUCE THE COST OF EARTHQUAKE RESISTANT STRUCTURES. THESE DEVICES, SUCH AS DAMPERS, ISOLATORS, ENERGY DISSIPATORS, AND ACTIVE CONTROLS, USE MATERIALS AND TECHNOLOGY THAT ARE QUITE NEW AND UNTRIED. THEIR LONG-TERM ENDURANCE, MAINTENANCE… more
Abstract:This is a feasibility study for a single pole, double throw, mechanical switch, using 1.85 mm coaxial connectors complying with the proposed connector standard in document IEC 46D (USA) 145. One major problem is the theoretical optimization of the two transitions from the 1.85 mm input coaxial… more
Abstract:Cancer drug development suffers greatly from a lack of preclinical models to reveal human disease-specific activity of new agents. We will determine whether skilled and insightful application of a fresh human tumor assay based on the concept of total tumor cell kill can identify clinical situations… more
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