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THIS PROJECT WILL DEFINE A COMPUTER SIMULATION CAPABILITY THAT CAN SYNTHESIZE CLOUD CLUTTER AND SEA RADIANCE SCENES MEASURED BY SHIPBORNE IRST SENSORS. THE CAPABILITY WILL BE AN EXPANSION OF ARI'S EXISTING AERIE (AERODYNE INFRARED EARTH) IR BACKGROUND RADIANCE SIMULATION CODE, DEVELOPED TO SYNTHESIZE INFRARED SCENE RADIANCES MEASURED BY IMAGING SENSORS. DETAILS OF THE PHYSICAL PROPERTIES OF THE CL ...

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MEASUREMENT OF FREQUENCY MODULATION ON PULSED SIGNALS IS A MATTER OF MAJOR CONCERN WHEN MANUFACTURING A PULSED SIGNAL SOURCE WITH SPECIFIED MODULATION CHARACTERISTICS. THESE MEASUREMENTS ARE ALSO IMPORTANT IN FIELD APPLICATIONS TO VERIFY PULSED SIGNAL PERFORMANCE OR TO DETERMINE THE NATURE OF FREQUENCY MODULATION. CONVENTIONAL DISCRIMINATOR TECHNIQUES ARE NOT SUITABLE FOR MEASURING FREQUENCY MODUL ...

THE ACTIVE SONARS TYPICALLY USED ON SUBMARINES OPERATE AT FREQUENCIES HIGH ENOUGH TO BE DIFFICULT IF NOT PRESENTLY IMPOSSIBLE TO MODEL ACCURATELY WITH FINITE ELEMENT ANALYSIS. LIKEWISE BEAM AND CYLINDER MODELS PROVIDE INADEQUATE REPRESENTATIONS OF THE HIGH FREQUENCY BEHAVIOR OF PLATE AND FRAME VIBRATIONS. THE APPLICATION OF THE AARC STATISTICAL ENERGY ANALYSIS PROGRAM WHICH INCLUDES BENDING, LONGI ...

A SUBMARINE MAST OR PERISCOPE WHICH PIERCES THE FREE SURFACE GENERATES A VISUALLY OBSERVABLE WAKE ON THE FREE SURFACE WHICH RENDERS THE SUBMARINE VULNERABLE TO DETECTION. IT IS PROPOSED TO INVESTIGATE THE FEASIBILITY OF REDUCING THIS WAKE BY A COMBINATION OF ACTIVE AND PASSIVE FLOW CONTROL DEVICES ATTACHED TO THE MAST OR PERISCOPE. A DEVICE SIMILAR TO A BULBOUS BOW ON SHIPS WILL BE USED TO REDUCE ...

IT IS PROPOSED THAT A COMPUTER CODE BE DEVELOPED WHICH WILL LOCATE AND DEDUCE THE SIGNATURE OF LOW FREQUENCY TRANSIENTS BY SPARCE SONOBUOY ARRAYS. IT WILL BE ASSUMED THAT WE KNOW THE PROPERTIES OF THE PROPAGATING MEDIUM AND THAT IT IS HORIZONTALLY STRATIFIED. THE ALGORITHM WILL HAVE FOUR PARTS: 1) A DETECTION SCHEME, 2) A CORRELATION ROUTINE TO DETERMINE TIME DELAYS, 3) A ROUTINE TO DETERMINE LOCA ...

THE OBJECTIVE OF THE PROPOSED RESEARCH IS TO LIMIT VOLTAGE DELAY, ANODE CORROSION DURING INTERMITTENT USAGE AND TO INCREASE THE CURRENT CAPABILITY AND CAPACITY OF LI/SOCL(2) CELLS THROUGH THE USE OF NEW ELECTROLYTE SALTS. THE PRINCIPLES USED WILL BE THOSE WHICH HAVE SUCCEEDED IN THE PAST, NAMELY, BY LIMITING THE CONCENTRATION OF THE ELECTROLYTE SALT AND BY USING THE LITHIUM SALTS OF LARGE ANIONS W ...

MODERN GENERAL PURPOSE VISCOUS FLOW CFD MODELING PROGRAMS WILL BE APPLIED TO DEVELOP METHODS FOR REDUCING THE VISIBLE WAKE PRODUCED BY SUBMARINES AT PERISCOPE DEPTH. DR. S. PANTKAR WILL ASSIST IN THE EFFORT. TECHNIQUES TO BE EXAMINED INCLUDE IMPROVE FAIRING DESIGN, FLOW MODIFICATION DEVICES, AND POLYMER ADDITION TO ALTER FLUID PROPERTIES.

ICE FORMATION ON NAVAL VESSELS IS A SERIOUS PROBLEM. THE ICE IS FORMED BY OCEAN SPRAY WHEN THERE IS AN APPROPRIATE COMBINATION OF STRONG WINDS AND LOW AIR TEMPERATURE. IT CAN ACCUMULATE TO SUCH AN EXTENT THAT IT CAN PLACE THE VESSEL IN DANGER OF CAPSIZING. ONE POSSIBLE SOLUTION IS TO USE HEAT PIPE TECHNOLOGY DEICE THE VESSEL. IN THIS METHOD, THE CRITICAL SECTIONS OF THE NAVAL VESSELS ARE EQUIPPED ...