Award Data

A feasibility investigation is proposed for designing a HIRF aircraft test facility which reduces existing test time by at least a factor of two without comprising the HIRF requirements for aspect angle/polarization and field strengths (both average and peak). SEA proposes a hybrid TEM cell/reverberation facility which will reduce test time involved with repositioning test equipment or test ...

Scientific Research Corporation (SRC) proposes to develop a digital implementation of a mechanical (analog-electronic) compression filter. The replacement filter will consist of an A/D converter, digital filter circuitry, a D/A converter, and the gain and filtering circuitry required to optimize the system. An analysis of the current system will be performed to determine the feasibility of such ...

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THE SOFTWARE SYSTEM ENGINEERING PROCESS OF CONVERTING CONCEPTS INTO REQUIREMENTS, AND THEN REQUIREMENTS INTO AN IMPLEMENTED SYSTEM IS BECOMING INCREASINGLY COMPLEX. CURRENT METHODS FALL SHORT OF THEIR OBJECTIVES IN HANDLING THIS COMPLEXITY. STRUCTURED FUNCTIONAL ANALYSIS (SFA) LACKS LINKAGE TO DELIVERABLE PRODUCTS - AN END ITEM MUST BE BUILT. ON THE OTHER HAND, THE NEWER OBJECT ORIENTED REQUIREMEN ...

SHIELD RITE proposes to utilize a finite difference, time domain model of the multilayer frequency selective surface (FSS) to examine how the bandwidth and the angular dependence of the reflection (or transmission) coefficient depend upon the number of layers and the spacing between the layers. We shall then look at the power handling capabilities of these filters by examining the electric fields ...

THE UNCERTAINTY IN MEASURING NEUTRON DOSE EQUIVALENT RATES RESULTS IN UNCERTAINTY IN ASSIGNMENT OF THE PROPER DOSE TO OCCUPATIONAL RECORDS AND CAN RESULT IN IMPROPER IMPLEMENTATION OF CONTROLS TO LIMIT THE EXPOSURE. A NOVEL PORTABLE NEUTRON SPECTROMETER IS PROPOSED WHICH WILL REDUCE THE UNCERTAINTY OF SUCH MEASUREMENTS TO LESS THAN 20%. MANYCOMPONENTS OF THIS DEVICE ARE COMMERCIALLY AVAILABLE. SYS ...

We propose a new method for adaptive nonstationary spectral estimation and harmonic analysis for stepped-frequency inverse synthetic aperture radar (ISAR) imaging. The essential idea is to construct a set of orthogonal windows that have little spectral leakage and use each of these windows to create an independent spectral estimate. A data dependent and frequency dependent weighted average ...

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ATOMIZED LIQUID SPRAY FILTRATION SYSTEMS ADDRESS THE DEFICIENCIES OF THE CURRENT BARRIER-TYPE FILTRATION SYSTEMS. PRESSURE DROP ACROSS THE LIQUID SPRAY IS LOW BECAUSE THERE IS NO OBSTRUCTION TO THE AIRFLOW; THUS THE SYSTEM WILL REQUIRE LESS SPACE AND CAN OPERATE WITH CONVENTIONAL VENTILATION FANS. THE PRESSURE DROP DOES NOT INCREASE WITH TIME BECAUSE THERE IS NO BUILDUP OF PARTICULATE ON A FILTER ...

ONE OF THE IMPORTANT NEEDS FOR NAVAL SUBMARINE WARFARE IS THE CAPABILITY TO GENERATE INTENSE ACOUSTIC PULSES IN WATER FOR NEUTRALIZATION OF UNDERWATER DEVICES AND FOR SONAR APPLICATIONS. THIS PROGRAM IS TO DEVELOP A NEW HIGH POWER ACOUSTIC SOURCE THAT WILL OPERATE EFFICIENTLY IN SALT WATER AND AT DIFFERENT PULSE LENGTHS TO NEUTRALIZE VARIOUS UNDERWATER DEVICES. THIS SBIR PROPOSED PROGRAM TAKES ADV ...