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Q-DOT PROPOSES A VERY HIGH-SPEED (10 - 20 GS/S) MEDIUM-RESOLUTION (6-BIT) ANALOG-TO-DIGITAL CONVERTER (ADC) USING AN ADVANCED HETEROJUNCTION BIPOLAR TRANSISTOR (HBT) PROCESS. INNOVATIVE CIRCUIT DESIGN, COMBINED WITH A VERY FAST HBT PROCESS, WILL BE USED TO DESIGN A PRACTICAL WIDE BANDWIDTH CONVERTER. THE DESIGN WILL ACCOUNT FOR THE REDUCED COMPLEXITY REQUIRED BY AN EMERGING TECHNOLOGY BY USING ANA ...

COHERENT TECHNOLOGIES, INC. HAS RECENTLY DEMONSTRATED THAT A 2 UM COHERENT LASER RADAR (CLR) OPERATING AT 1 MJ/PULSE WITH A 16 CM BEAM DIAMETER, IS CAPABLE OF PERFORMING HARD TARGET RANGE AND VELOCITY MEASUREMENTS TO AT LEAST 50 KM. SCALING THESE RESULTS TO50 UJ/PULSE AND A 5 CM TELESCOPE INDICATE THAT RANGE RESOLVED VELOCITY MEASUREMENTS TO RANGES OF SEVERAL MK SHOULD BE FEASIBLE. WE BELIEVETHAT ...

ENHANCING THE SKILLS NECESSARY FOR INDEPENDENT LIVING IS A PRIMARY GOAL OF SERVICE TO INDIVIDUALS WITH MENTAL RETARDATION. ONE OF THE SKILLS REQUIRED TO INCREASE INDEPENDENCE IS THE ABILITY TO MANAGE FINANCES. A KEY ASPECT INVOLVED IN FINANCIAL MANAGEMENT FOR INDIVIDUALS WITHMENTAL RETARDATION IS MANAGING A PERSONAL CHECKING ACCOUNT. THIS IS ALSO ONE OF THE SKILLS MOST DIFFICULT FOR INDIVIDUALS WI ...

Not Available High power motors and generators can be made very compact when run under cryogenic conditions. For further enhancements in power densities it is highly desirable to use High Temperature Superconductors with a greatly enhanced critical current densigy Jc at 3T at 77K, which would allow the use of liquid nitrogen as a coolant. Under these operating conditions the superconductor YBa2Cu ...

THE TIME DOMAIN FINITE DIFFERENCE (TDFD) METHOD OF SOLVING ELECTROMAGNETIC FIELD PROBLEMS IS A RELATIVELY NEW METHODOLOGY WITH A PROVEN CAPABILITY FOR ACCURATELY ANALYZING PASSIVE MIC/MMIC STRUCTURES. THE TECHNIQUE SUPPLIES COMPLETE SCATTERING MATRICES IN EITHER THE TIME OR FREQUENCY DOMAIN. MILLIONS OF FIELD POINTS CAN BE ANALYZED IN PROBLEM "CUBES" WELL OVER 100 CELLS ON A SIDE. WITH SPECIAL PUR ...

THIS PROPOSAL SUGGESTS A NEW METHODOLOGY, MADE PRACTICAL BY NEW HARDWARE, TO EFFICIENTLY OBTAIN OPTIMUM DESIGN PARAMETERS FOR MILLIMETER WAVE CIRCUITS. THE TECHNIQUE IS BASED ON THE TIME DOMAIN FINITE DIFFERENCE (TDFD) APPROACH TO THE TIME ADVANCING OF MAXWELL'S EQUATIONS. THE SCATTERING MATRIX AND OTHER PARAMETERS CAN BE READILY DETERMINED OVER THE DESIRED FREQUENCY DESIGN RANGE. THE METHOD'S ADV ...

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THE PROPOSED RESEARCH WILL PROVIDE A FOCUSED SETOF LABORATORY EXPERIMENTS WHICH WILL HELP TO QUANTIFY SOME OF THE CRITICAL EFFECTS OF JOINTED ROCK MEDIA ON COUPLING OF NUCLEAR EXPLOSIONS. THE SELECTION OF A FOCUSED SET OF LABORATORY EXPERIMENTS WILL BE GUIDED BY THE AVAILABLE KNOWLEDGE FROM THE COUPLING COMMUNITY AND A NUMERICAL (FINITE ELEMENT) PARAMETER STUDY SPANNING THE JOINTED MEDIA COUPLING ...

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IN SUPPORT OF EXISTING AND PROPOSED NUCLEAR TESTLIMITATION TREATIES, IT IS INCREASINGLY IMPORTANT THAT IMPROVED METHODS FOR UNDERSTANDING AND PREDICTING THE SEISMIC COUPLING OF NUCLEAR DETONATIONS BE DEVELOPED. WITH THE POSSIBILITY OF BETTER DEFINE THE GEOLOGY EXISTING AT SOVIET TEST SITES, SUBTLE VARIATIONS IN COUPLING OF NUCLEAR DETONATIONS TO VARIOUS ROCK TYPES COULD BE IMPORTANT. ONE FEATURE O ...