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THE OVERALL GOAL OF THIS RESEARCH IS TO DEVELOP AN INNOVATIVE NONDESTRUCTIVE (NONINVASIVE) INSPECTION TECHNIQUE FOR THE DETERMINATION OF THE INTEGRITY OF RUBBER-TO-METAL BONDS OF THE TYPE USED IN PRODUCTION SONAR TRANSDUCERS. THE PHASE I EFFORT WILL DEVELOP THE IMPEDANCE ANALYSIS TECHNIQUE THAT RELATES THE ELECTRICAL IMPEDANCE CHARACTERISTICS OF AN ULTRASONIC TRANSDUCER TO THE PROPERTIES OF A BOND ...

THE INTENT OF DOD INSTRUCTION 4245.4, "ACQUISITION OF NUCLEAR SURVIVAL SYSTEMS" IS TO PROVIDE FOR NUCLEAR SURVIVABILITY THROUGHOUT THE LIFE CYCLE OF WEAPON SYSTEMS WHICH ARE REQUIRED TO SURVIVE THE EFFECTS OF NUCLEAR WEAPONS. ONE KEY TO IMPLEMENTING THIS INTENT IS TO INSURE THAT ALL THE PEOPLE INVOLVED ARE FAMILIAR WITH THEIR RESPONSIBILITIES TO IMPLEMENT AND PRESERVE THIS SURVIVABILITY. THIS STUD ...

UNDER THIS CONTRACT, WE WILL DEVELOP A FUNDAMENTAL UNDERSTANDING OF THE EFFECTS OF HIGH POWER MICROWAVE (HPM) SIGNALS ON INTEGRATED CIRCUITS. SPECIFIC OBJECTIVES INCLUDE: 1) ANALYZE AND FAIL COMPONENTS TO DEVELOP AN UNDERSTANDING OF THE FAILURE PROCESSES, 2) MODEL SELECTED PARTS AND DEVELOP RESPONSE PREDICTION TOOLS, 3) DESIGN TESTS TO QUANTITATIVELY MEASURE AND SEPARATE VARIOUS PHENOMENA, 4) DESI ...

A FAST NEW APPROXIMATION FOR THE METHOD OF MOMENTS SOLUTION OF ELECTROMAGNETIC RESPONSE PROBLEMS IS PROPOSED. THE NEW APPROACH IS BASED ON SEPARATION OF THE PROBLEM INTO A GLOBAL RESPONSE SET DEPENDENT ON NORMAL MODES, AND A LOCAL RESPONSE DEPENDENT ON GEOMETRICAL OPTICS. THE EFFORTS OF NEGLECTING THE LOCAL RESPONSE TERM ALONG WITH OTHER APPROXIMATIONS WILL BE INVESTIGATED TO QUALITFY THE RESULTIN ...

CERAMIC LINED COMPOSIED GUN BARRELS OFFER A NEAR IDEAL MATERIALS COMBINATION TO PRODUCE LIGHT WEIGHT GUN BARRELS THAT WILL WITHSTAND 20-30 MM RAPID FIRE BALLISTIC CYCLE OF 1600-1800 DEG F AND PRESSURE UP TO 70,000 PSI FOR LESS THAN 5 MILLISECONDS AT APPROXIMATELY 1/2 THE WEIGHT OF STEEL BARRELS. A UNIQUE FABRICATION METHODOLOGY WILL BE UTILIZED TO APPLY A COMPRESSIVE METAL LAYER TO A CERAMIC LINER ...

THE OBJECTIVE OF THIS PROPOSAL EFFORT IS TO DEVELOP A SCREENING CRITERIAL OR CHIP DESIGN CRITERIA TO RESULT IN INTEGRATED CIRCUITS HARDENED TO HIGH POWER MICROWAVE EXPOSURE. THIS EFFORT WILL CONCENTRATE ON THE ANALYSIS AND STUDY OF FAILED DEVICES FURNISHED BY DOD. THE PROPOSED APPROACH TO GAIN A FUNDAMENTAL UNDERSTANDING OF THE FAILURE PROCESSES AND TO ACHIEVE HARDENED DEVICES WILL INCLUDE THE FOL ...

A SIMPLE SAFETY ARMING SWITCH FOR GUIDED MISSILES CAN BE BUILT AROUND AN ACCELEROMETER AND INTEGRATING CIRCUIT. IN GENERAL, DURING THE LAUNCH BOOST PHASE, THE ACCELERATION OF A MISSILE INCREASES TO A MAXIMUM JUST BEFORE BURNOUT. CHARACTERISTIC ACCELERATION PROFILES FOR A PARTICULAR MISSILE ARE DEPENDENT UPON FUEL TAILORING AND MISSION REQUIREMENTS; I.E. AIR-TO-AIR MISSION, GROUND-TO-AIR MISSION, E ...

THE OBJECTIVE OF THIS PROJECT IS TO EVALUATE THE FEASIBILITY OF GROWTH OR FUSION OF OPTOELECTRONIC DEVICES DIRECTLY ONTO THE OPTICAL FIBER. THIS APPROACH WILL HAVE SIGNIFICANT IMPLICATION AND BENEFITS ON FUTURE FIBER OPTIC COMMUNICATIONS. TO ACHIEVE THE OBJECTIVE, A COMPLETE LITERATURE SEARCH RELATED TO THE TOPIC WILL BE COMPILED. A THEORETICAL ANALYSIS ON ALL POSSIBLE DESIGNS WILL BE INVESTIGATED ...

THE DEVELOPMENT OF HIGH POWER, HIGH REPETITION RATE CLOSING SWITCHES HAS RECENTLY BECOME IMPORTANT FOR MANY PULSED POWER APPLICATIONS. HISTORICALLY, HIGH REPETITION RATE SWITCHES FOR PULSED POWER APPLICATIONS HAVE EITHER BEEN SPARK GAPS OR THYRATRONS. THYRATRONS HAVE HIGH REPETITION RATES, BUT ARE LIMITED TO LOW VOLTAGES AND LOW CURRENT. CONVERSELY, SPARK GAPS CAN CARRY HIGH CURRENTS AND STAND-OFF ...

ENTECH IS PLEASED TO PROPOSE TO THE STRATEGIC DEFENSE INITIATIVE ORGANIZATION THE DESIGN DEVELOPMENT OF AN INNOVATIVE DOME FRESNEL LENS/GALLIUM ARSENIDE PHOTOVOLTAIC CONCENTRATOR ARRAY, CAPABLE OF ACHIEVING AN AMO OPERATIONAL ARRAY EFFICIENCY OF 20.4% IN THE SPACE ENVIRONMENT. THE PROPOSED SYSTEM WILL UTILIZE THREE HIGHLY INNOVATIVE FEATURES: (I) A DOME FRESNEL LENS CONCENTRATOR WHICH WILL PROVIDE ...