Award Data

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A VARIATIONAL TECHNIQUE WILL BE USED TO COMPUTE THE ELECTROMAGNETIC FIELDS OF TRAVELING WAVES IN A HELICAL SLOW-WAVE CIRCUIT WITH HELICAL DIELECTRIC SUPPORT. BY GENERALIZING THE TRIAL FIELDS FROM THOSE USED IN AN EARLIER STUDY AND BY APPLYING POINT- MATCHING CONSTRAINTS, AN EFFICIENT COMPUTATION WILL BE DEVELOPED FOR THE PAHASE VELOCITY, INTERACTION IMPEDANCE, AND CHARACTERISTIC IMPEDANCE OVER A C ...

MILITARY COMMUNICATIONS SYSTEMS ARE SUBJECT TO TRAUMA. CERTAIN CHANNELS FAIL FOR PROTRACTED PERIODS OF TIME. THE RED NOISE PROBLEM ARISES WHEN SOME, BUT NOT ALL, OF THE CHANNELS LINKING A SENDER TO A RECEIVER BECOME INOPERATIVE. THE SOLUTIONS TO THIS PROBLEM ARE CALLED POOL/SPLIT/ RESTITUTE PROCESSES. P/S/R PROCESSES AMOUNT TO WAYS TO ENCODE DIGITAL MESSAGES AT A SENDING NODE SO AS TO MAKE SURE TH ...

CURRENT SHOT PEENING TECHNOLOGY DOES NOT OFFER THE CAPABILITY TO ACCURATELY PREDICT FATIGUE LIFE BENIFITS. RECENT TEST RESULTS IDENTIFY A HERETOFORE UNDOCUMENTED SURFACE INTEGRITY PHENOMENOM ASSOCIATED WITH PEENING AT RELATIVELY HIGH INTENSITIES WHICH HAS BEEN LINKED TO PREMATURE SPECIMEN FAILURE AT SPECIMEN FAILURE AT FATIGUE LIFE LOWER THAN THAT OF UNPEENED SPECIMEN. DATA PRESENTED BY SEVERAL AU ...

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THE INCREASINGLY WIDESPREAD APPLICATION OF MIL-STD-1553B TO MILITARY AND, POTNTIALLY COMMERCIAL AIRCRAFT HAS CREATED A NEED FOR DIGITAL OUTPUT FLOW ANGLE TRANSMITTERS. THE CURRENT MEANS OF GENERATING A DIGITAL OUTPUT FROM EXISITING TRANSDUCERS HAS AN UNFLAVORABLE IMPACT ON SIZE, WEIGHT, POWER, COST AND RELIABILITY. DIGITIAL ENCODING TECHNIQUES ARE BELIEVED TO HAVE BENEFICIAL APPLICATION TO EXISTIN ...

ATTAINABLE COMPUTATION RATES ONCOMPUTERS WITH SERIAL ARCHITECTURE ARE A SERIOUS LIMITATION FOR THE SIMULATION OF THE HYDRODYNAMIC BEHAVIOR OF FLUIDS. COMPUTERS WITH PARALLEL PROCESSING ARCHITECTURE CAN ACHIEVE MUCH HIGHER RATES. THE COMPUTER RESEARCH AND APPLICA TIONS GROUP AT LOS ALAMOS NATIONAL LABORATORIES IS MAKING THEIR DENELCOR HEP COMPUTER AVAILABLE FOR RESEARCH PROJECTS CONDUCTED BY OTHER ...

SINGLET DELTA OXYGEN PROVIDES A SOURCE OF ELECTRONIC ENERGY FOR CHEIMICALLY PUMPED LASER SYSTEMS, MOST NOTABLY THE OXYGEN-IODINE LASER. SEVERAL IMPORTANT REACTIONS IN THE OXYGEN-IODINE LASER MAY DEPEND CRITICALLY ON THE AMOUNT OF VIBRATIONAL EXCITATION IN THE G STATE. IN THIS PROPOSAL, WE EVALUATE SEVERAL TECHNIQUES FOR MEASURING THE POPULATION OF VIBRATIONALLY EXCITED O G. THE LASERINDUCED EMISSI ...

THE POSIDENT CONCEPT USES FINGER PRINT IDENTIFICATION SYSTEM TO COMPARE THE SUBJECTS LIVE FINGER PRINT WITH A STORED FINGER PRINT. THE STORAGE MEDIUM CAN BE ONE OF SEVERAL TYPES. A PHOTOGRAPHIC IMAGEIIS ONE METHOD OF STORAGE. DIGITAL DATA IN PROM IS A SECOND METHOD. THE ID CARD IS PLACED FON THE ELECTRO-OPTICAL CORRELATION DEVICE. A VIDEO CAMERA (VIDICON OR SOLID STATE CCD CAMERA) IS USED TO SCAN ...

NASA'S SPACE SHUTTLE IS LAUNCHED BY THREE LIQUID PROPELLANT ENGINES AND TWO SOLID MOTOR BOOSTERS. THESE BOOSTERS PRODUCE LARGE AMOUNTS OF HYDROGEN CHLORIDE CREATING A POTENTIAL HAZARD TO PERSONNEL AND PROPERTY. THEREFORE, A DEVICE IS NEEDED TO PROVIDE HC1 LOCATION AND CONCENTRATION DATA FOR USE IN TOXIC HAZARD PREDICTIONS AND TO PROTECT THE GOVERNMENT AGAINST LEGAL ACTIONS. WE PROPOSE TO USE A NEW ...