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A modified engine cycle based on the early intake valve closing of the Miller or the Adkinson cycle is proposed to meet the needs of the future Military Advanced Diesel Engine. The concpet involves the principle of short, effective compression with long expansion ratio to provide high brake thermal efficiency. This concept is executed by a variable timing rotary valve placed before the standard in ...

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The promise of formal methods to eliminate design errors in safety critical systems is realizable, however, much of the technology remains academic or removed from current engineering practice. At Derivation Systems, Inc. we believe that in over for formal methods to reach their full potential, a formal design tool must support the generative and deductive aspects of design. We also believe that f ...

The proposed research entails the development of a pulsed power driver capable of producing an electrical pulse with peak currents greater than 200 amps, peak powers greater than 200 kilowatts, and repetition rates greater than 10 kHz. MellWood Laboratories, Inc. has developed an entirely solid state system to create these high power pulses. The switching device consists of a monolithically inte ...

Cold cathode devices capable of emitting electrons into a vacuum without relying on high temperature thermionic emission are expected to play an important role in a wide variety of applications ranging from high frequency, high power amplifiers to flat panel displays. Cold cathode devices based on negative electron affinity materials rely on semiconductors for which the barrier between electrons i ...

The Perrigo Technology, Inc. team proposes an innovative, multi- discipline research program to develop a rapid repair system by integrating emerging corrosion control technology with many recent developments in the use of steel components to strengthen concrete structures. The proposed repair system consists of prefabricated "steel component modules" suitable for various common repair scenarios, ...

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RAPID INTENSE HEATING OF COMPOSITE LAMINATES DUE TO DIRECT ENERGY WEAPONS WILL INDUCE STRONG THERMAL GRADIENTS THAT IN TURN PRODUCE DYNAMIC STRESSES IN THE FORM OF WAVE MOTION. THE OBJECTIVE OF THIS RESEARCH IS TO DEVELOP A MINDLIN PLATE FINITE ELEMENT PROGRAM FOR ANALYSIS OF THE DYNAMIC BEHAVIOR IN A COMPOSITE LAMINATE SUBJECTED TO COMBINED THERMAL/SHOCK AND SIMULATED IN-FLIGHT AERODYNAMIC LOADIN ...

RECENT TECHNICAL ADVANCEMENTS IN THE SEMICONDUCTOR DEVICE AND POWER CONDITIONING TECHNOLOGIES HAVE LED TO SUBSTANTIAL IMPROVEMENTS IN TERMS OF SIZE, WEIGHT, EFFICIENCY AND POWER QUALITY OF THE POWER CONDITIONING EQUIPMENT WHICH IS BEING CONSIDERED FOR SPACE APPLICATIONS. WITH THESE ADVANCEMENTS COMES AN ABUNDANCE OF DESIGN CHOICES AND INCREASED DEGREES OF FREEDOM WITH RESPECT TO POWER SYSTEM CONTR ...

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