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WELD QUALITY AND WELD INSPECTION ARE MAJOR CONCERNS OF PIPELINE CONSTRUCTION. PRESENT INSPECTION METHODOLOGY REQUIRES SIGNIFICANT TIME DELAYS BETWEEN WELDING AND ACCEPTANCE OF THE WELD. THE COST OF THESE DELAYS IS ENORMOUS CONSIDERING THAT PIPELINE COSTS RUN UPWARDS OF $10 6/MILE AT RATES OF APPROXIMATELY 10 MILES/WEEK. ON-LINE MONITORING CAN BE EXPECTED TO PROVIDE A MINIMUM OF 10% ACCELERATION IN ...

TWO MAJOR OBSTACLES CONFRONTED PREVIOUS ATTEMPTS TO ANALYZE FIELD ICE BEHAVIOR; NAMELY: THE LACK OF PROPER CONSTITUTIVE LAWS TO MODEL REALISTIC ICE BEHAVIOR, PARTICULARLY AT HIGH STRAIN-RATES, AND THE DIFFICULTY IN INCORPORATING LARGE ICE DEFORMATIONS IN THE ANALYSIS. THIS PROPOSAL PRESENTS A STUDY WHICH WILL IMPLEMENT AN ICE CONSTITUTIVE MODEL SUBROUTINE TO WORK IN CONJUNCTION WITH A LAGRANGE EXP ...

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HIGH VOLTAGES CAN BE DEVELOPED ON MATERIALS SUBJECT TO TRIBOELECTRIC FORCES. CONSEQUENTLY, THE CAPABILITY OF MEASURING THE POTENTIAL OF HAZARDOUS SPARKS WHEN CHARGED SURFACES COME IN CONTACT WITH EACH OTHER IS NEEDED. A MEASUREMENT APPROACH BASED ON AN OPTICAL FIBER SENSOR TECHNIQUE WHICH WILL CHARACTERIZE THE SURFACE CHARGE DENSITYAND POTENTIAL OF A NONCONDUCTING FILM IS PROPOSED TO MEET THIS NEE ...

CLIMATE-SOIL MODELS WILL BE INTEGRATED WITH REGIONAL CLIMATEAND SOIL DATA TO DEVELOP PRACTICAL TECHNIQUES FOR EVALUATIONOF SOIL AND WATER RESOURCES IN AGRICULTURE, FORESTRY, AND LAND USE MANAGEMENT. THE GOAL OF THE PHASE I AND PHASE II RESEARCH IS TO DEVELOP AN INTEGRATED MICROCOMPUTER BASED TECHNOLOGY FOR ASSESSMENT OF IMPACTS OF CLIMATE VARIATION ONSOIL WATER RESOURCES. SPATIAL DISTRIBUTION OF C ...

THE GOAL OF THE PROPOSED RESEARCH IS TO DETERMINE THE FEASIBILITY OF DEVELOPING A SPEAKER-INDEPENDENT SPEECH RECOGNITION SYSTEM THAT CAN BE IMPLEMENTED ON CURRENTLY AVAILABLE HARDWARE COMPONENTS. THE SYSTEM USES FEATURE-BASED APPROACH TO SPEECH RECOGNITION, IN WHICH THE PERCEPTUALLY RELEVANT FEATURES OF SPEECH ARE EXTRACTED FROM THE SIGNAL AND USED TO IDENTIFY SPEAKER-INDEPENDENT PATTERNS FOR THE ...

THE USE OF ION BEAMS AS A MEANS OF ENHANCING THE PROPERTIES OF DEPOSITED THIN FILMS HAS ATTRACTED CONSIDERABLE INTEREST IN THE LAST FEW YEARS. THE FURTHER DEVELOPMENT OF ENERGETICALLY-ENHANCED ION DEPOSITION TECHNIQUES IS EXPECTEDTO RESULT IN A NEW GENERATION OF EXOTIC COATINGS WITH SUPERIOR ADHESION, NEAR-THEORETICAL DENSITIES, VERY HIGH HARDNESS, AND, AT THE SAME TIME, CAPABLE OF BEING DEPOSITED ...

SILCON-ON-INSULATOR TECHNOLOGIES SUCH AS SILICON-ON-SAPPHIRE(SOS) HAVE BEEN SHOWN TO BE ESSENTIAL FOR PROVIDING ISOLATION OF TRANSISTORS FROM SUBSTRATES FOR INCREASED OPERATING SPEED. A PROMISING NEW APPROACH, SEPARATION BY ION IMPLANTATION OXYGEN (SIMOX), HAS ALREADY DEMONSTRATED HIGH QUALITY CIRCUITS WITHOUT THE SILICON DEFECTS OFTEN FOUND IN SOS. HOWEVER, THE LOW THROUGHPUT, HIGH COST, AND COMP ...

DIAMONDS ARE NATURE'S HARDEST SUBSTANCE AND IN ADDITION TO THEIR VALUE AS GEMS, THEY ARE OF IMPORTANCE FOR ABRASIVE GRINDING APPLICATIONS, WITH SYNTHETIC DIAMONDS BEING INCREASINGLY USED FOR THE PAST THIRTY YEARS. NITROGEN IS THE MAJOR IMPURITY OF DIAMONDS (UP TO 0.3 AT.%) AND PLAYS A MAJOR ROLE IN INFLUENCING THEIR OPTICAL AND MECHANICAL PROPERTIES. ION IMPLANTATION OF DIAMOND HAS BEEN STUDIED BY ...