Award Data

FOR PHASE I, AMSI PROPOSES TO IDENTIFY AND ESTABLISH THE TECHNICAL FEASIBILITY OF VARIOUS ADVANCED ACOUSTIC ARRAY CONCEPTS. THREE GENERIC APPROACHES ARE CURRENTLY IDENTIFIED: 1) OPTIMIZE THE SENSOR DESIGN (I.E., DIRECTIONAL SENSORS, ETC.), 2) OPTIMIZE HYDROPHONE/ GROUP/ARRAY GEOMETRY (I.E., MULTI-APERTURES, ETC.), AND 3) IMPLEMENT SIGNAL PROCESSING TECHNIQUES (I.E., VARIOUS ANALYTIC CONTINUATION T ...

THE FAILURE CRITERIA PRESENTLY USED FOR PREDICTION OF THE ULTIMATE STRENGTH OF A COMPOSITE MATERIAL ARE BASED UPON THE ASSUMPTION THAT THE COMPOSITE BEHAVES AS AN IDEAL ORTHOTROPIC MATERIAL. THIS IDEALIZATION OF COMPOSITE MATERIALS IS INCONSISTENT WITH THE WAY BRITTLE COMPOSITE MATERIALS FAIL. SINCE FAILURE GENERALLY BEGINS AT A SMALL CRACK OR VOID A FAILUTE CRITERIA BASED UPON A CRITICAL FLAW SIZ ...

The speed at which an attack is detected is a critical trigger for all responses to follow. The accurate determination of the type of attack will determine the type of emergency personnel and response needed. The location will determine the target response area as well as determine by proximity which of the responders that are available can be first on the scene. Therefore, a system that can do th ...

SEVERAL PERFLUORODICARBOXYLIC ACIDS WILL BE PRODUCED BY DIRECT FLUORINATION AND REDUCED TO THE CORRESPONDING DIFUNCTIONAL FLUOROALCOHOLS. WITH DIRECT FLUORINATION ONE CAN PRODUCE FLUOROALCOHOLS WHICH CONTAIN LONG CHAIN OR BRANCHED FLUOROCARBON SECTIONS EASIER THAN BY CONVENTIONAL METHODS. IN ADDITION SOME SMALL CHAIN PERFLUOROPOLYETHER DIACIDS WILL BE MADE AND CONVERTED TO THE FLUOROALCOHOLS. THE ...

IT IS PROPOSED TO USE PHASE I TO ASSESS THE APPLICABILITY OF A NEW ULTRASONIC HEAD-TRACKER SYSTEM DEVELOPED FOR HELICOPTER USE BY AEG, A PROTOTYPE OF WHICH COULD BE MADE AVAILABLE TO W.W. GAERTNER RESEARCH, INC. FOR THIS TEST. IF THE ACCURACY OF THE ORIGINAL PROTOTYPE IS NOT ADEQUATE, SEVERAL DESIGN IMPROVEMENTS ARE SUGGESTED WHICH COULD BE IMPLEMENTED UNDER PHASE II.

THIS PAPER PRESENTS A NEW APPROACH TO THE DESIGN OF A SELF-CONTAINED UNDERWATER DATA ACQUISITION SYSTEM (UDAS) BASED ON A GENERAL-PURPOSE DIGITAL SIGNAL PROCESSING (DSP) ARCHITECTURE. THE PROPOSED ARCHITECTURE USES A HIGH-PERFORMANCE MILITARY STANDARD SINGLE-CHIP MICROPROCESSOR AS A SYSTEM CONTROLLER. WHEREAS EXISTING SYSTEMS USE SPECIAL-PURPOSE HARDWARE DEDICATED TO SIGNAL PROCESSING FUNCTIONS, I ...

MULTISPECTRAL ANALYSIS TECHNIQUES PERMIT ANALYSIS OF NONLINEARITIES GIVING RISE TO CERTAIN BROADBAND SIGNALS. THE ADVANTAGES OF THIS TECHNIQUE OVER LINEAR METHODS ARE DETAILED.

THE POTENTIAL TECHNOLOGICAL IMPORTANCE OF MULTICOMPONENT ULTRAFINE MICROSTRUCTURES MAKES IT ESSENTIAL TO DEVELOP METHODS OF FORMATION WHICH PERMIT BOTH HIGHER GROWTH RATES AND IMPROVED CONTROL OVER MATERIAL PROPERTIES. WE PROPOSE A NEW TECHNIQUE, "GAS JET DEPOSITION", THAT HAS THE POTENTIAL TO PROVIDE THESE CAPABILITIES AND OTHER ADVANTAGES OVER ESTABLISHED METHODS. IN THIS TECHNIQUE, DEPOSITING A ...

ACOUSTIC RESONANCE CREATES A PROBLEM WITH BOTH THE OPERATION AND THE DURABILITY OF CURRENT HIGH PERFORMANCE GAS TURBINE AUGMENTORS. FUTURE GAS TURBINES ARE EXPECTED TO HAVE AN EVEN MORE SEVERE ENVIRONMENT FOR AUGMENTOR RESONANCE. THE CURRENT LEVEL OF UNDERSTANDING OF THIS PROBLEM GIVES NO ASSURANCE THAT SATISFACTORY PERFORMANCE CAN BE OBTAINED FROM THE MORE ADVANCED AUGMENTORS WITHOUT MAJOR DEVELO ...

A COMBINED EXPERIMENTAL AND ANALYTICAL STUDY IS PLANNED TO DEVELOP ADVANCED COMPOSITE PIPING SYSTEMS. DUAL WALL PIPE WILL BE DEVELOPED AND TESTED FOR IMPROVED IMPACT RESISTANCE AND TOUGHNESS. EPOXY AND POLYESTER RESINS WILL BE USED IN COMPOSITE PIPE SECTIONS AND BONDED WITH EPOXY ADHESIVES AS WELL AS WITH HEAT-SHRINKABLE ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE AND ADVANCED ELASTMERIC COUPLINGS AN ...