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BECAUSE OF THE COMPLEXITY OF THE HELICOPTER FLOW FIELD, A ZONAL METHOD OF ANALYSIS OF COMPUTATIONAL AERODYNAMICS IS REQUIRED. IN THIS RESEARCH, A NEW PROCEDURE FOR COUPLING POTENTIAL AND VISCOUS FLOW CALCULATION SCHEMES IS PROPOSED. AN OVER-LAPPING, VELOCITY-COUPLING TECHNIQUE IS TO BE DEVELOPED WITH THE UNIQUE FEATURE THAT THE POTENTIAL FLOW SURFACE SINGULARITY STRENGTHS ARE OBTAINED DIRECTLY FRO ...

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BECAUSE INTERNATION TREATIES PRECLUDE HIGH-ALTITUDE NUCLEAR TESTS, THERE IS LITTLE RELEVANT DATA FROM NUCLEAR BURSTS REGARDING THE SIZE AND DYNAMICS OF STRIATIONS IN NUCLEAR PLUMES OR EVEN THE BASIC PHYSICAL CONDITIONS WHICH PERMIT THE EVOLUTION OF STRIATIONS. THE UNDERSTANDING OF STRIATION BEHAVIOR IS IMPORTANT, AS STRIATIONS GENERATED WHEN THE IONOSPHERE IS DISTURBED BY NATURAL OR NONNUCLEAR MAN ...

MICROWAVE RADIO CORPORATION PROPOSES TO PERFORM ADEQUATE STUDY AND TESTING TO SPECIFY A FORM, FIT, AND FUNCTIONAL REPLACEMENT FOR THE TWT AMPLIFIER IN THE AN/FRC-173(V) DRAMA RADIO.

A STUDY IS PROPOSED TO DEVELOP A FIRST-ORDER MODEL FOR ASSESSING COUPLED ABLATION/EROSION RESPONSE OF COMPOSITE MATERIALS USED FOR NOSETIPS AND HEATSHIELDS ON VARIOUS VEHICLES. THIS MODEL WILL BE DEVELOPED FROM AVAILABLE EROSION DATA AND SELECTED SINGLE IMPACT EROSION DATA OBTAINED ON VIRGIN AND CHARRED MATERIALS. UNCERTAINTY BOUNDS FOR VARIOUS MATERIAL AND ENVIRONMENTAL INFLUENCE VARIABLES WILL B ...

ON-SITE VERIFICATION HAS EMERGED AS AN INTEGRAL PART OF ANY AGREEMENT REACHED BETWEEN THE UNITED STATES AND THE SOVIET UNION UNDER THE STRATEGIC ARMS REDUCTION TALKS (START). THIS IS AN ESPECIALLY IMPORTANT CONSIDERATION WHEN FORMULATING OPERATIONAL PROCEDURES FOR THE IMPLEMENTATION OF REENTRY VEHICLE (RV) COUNTING RULES. CONFIRMATION OF THE NUMBER OF RVS ON A DEPLOYED MISSILE SYSTEM REQUIRES PHYS ...

THE LONG TERM OBJECTIVES OF THIS RESEARCH ARE TO IMPLEMENT AAND EVALUATE NOVEL ADAPTIVE ELECTROCARDIOGRAPHIC DIGITAL S SIGNAL PROCESSING TECHNIQUES. THESE TECHNIQUES OFFER PO POTENTIAL DIAGNOSTIC AND MONITORING VALUE IN THE FIELD OF ELECTROCARDIOGRAPHY (ECG) AND FETAL HEART RATE (FHR) MONITORING. THE SPECIFIC AIMS OF THIS RESEARCH ARE TO ASSESS THE SPEED AND EFFECTIVENESS OF AN ADAPTIVE REAL-TIME ...

THE FREE ELECTRON LASER (FEL) REQUIRES A HIGH BRIGHTNESS, HIGH DUTY CYCLE ELECTRON BEAM. USE OF A PHOTOCATHODE, WHICH ELIMINATES BOTH GRIDAND BUNCHER AND ALLOWS HIGH GRADIENT RADIO FREQUENCY FIELDS AT THE ELECTRON SOURCE, CAN SUBSTANTIALLY IMPROVE THE BEAM BRIGHTNESS. FEL PHOTOCATHODES INVESTIGATED TO DATE (PRIMARILY CS:F:GAAS AND CS3SB) HAVE A SHORT EMISSION LIFETIME WHEN DRIVEN TO HIGH CURRENT A ...

ATOMIC LAYER EPITAXY (ALE) IS A PROMISING GROWTH TECHNIQUE. THE ATTRACTIVENESS OF ALE FOR FUTURE DEVICE AND INTEGRATED CIRCUIT APPLICATIONS CAN BE UNDERSTOOD BY CONSIDERING SEVERAL DESIRABLE ATTRI-BUTES FOR EPITAXIAL GROWTH TECHNIQUES. THESE INCLUDE LOWER DEFECT DENSITY, IMPROVED UNIFORMITY OF THICKNESS AND DOPING, IMPROVED THICKNESS CONTROL, AND THE POSSIBILITY OF CONFORMAL EPITAXY. A MAJOR PROBL ...

THIS STUDY INVESTIGATES A CONCEPT FOR IMPROVING THE AVERAGE POWER OF RADAR QUALITY CO2 TRANSMITTERS. DEFENSE APPLICATIONS INCLUDE LASER RADARS AND REMOTE SENSING. COMMERCIAL USES ARE INDUSTRIAL PROCESSES SUCH AS CUTTING, SCRIBING, AND MARKING, AS WELL AS REMOTE SENSING.