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A novel approach for controlling weld bead penetration is proposed. The methodology is distinguished from past techniques by use of: 1) a new and more accurate model of the weld pool dynamic behavior, 2) an improved method of sensing the weld pool oscillations, 3) a more efficient method of weld pool excitation, and 4) a model-based relation of pool dynamics, weld pool geometry, and equipment para ...

The primary objective of the proposed investigation is to develop numerical tools capable of producing scalable algorithms for efficient solution of a general class of large geophysical inverse problem in a massively parallel processing (MPP) computing environment. An example problem is the rigorous solution of the Earth's gravity field using massive satellite data. Currently, such a solution can ...

SUMX CORPORATION HAS DEVELOPED A NEW PHOTOELECTROCHROMIC IMAGING SYSTEM EMPLOYING A THIN FILM OF PRUSSIAN BLUE ON SINGLE CRYSTAL AND POLYCRYSTALLINE SEMICONDUCTOR ELECTRODES.THE FABRICATION OF THE ELECTROCHROMIC MATERIAL INVOLVES THE ELECTROCHEMICAL DEPOSITION OF A THIN IMMOBILIZED SURFACE FILM. THESE PRUSSIAN BLUE COATINGS EXHIBIT EXCELLENT REVERSIBILITY, CYCLE STABILITY, COLOR CONTRAST BETWEEN T ...

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CONVENTIONAL MOLECULAR BEAM EPITAXY (MBE) GROWTH CONTROL SYSTEMS ARE EITHER OPERATED MANUALLY OR WITH SIMPLE LINEAR CONTROLLERS USING PREDEFINED RECIPES. WE WILL SUPPLEMENT A STANDARD CONTROL SYSTEM WITH A NEURAL NETWORK BASED CONTROLLER. THE NEURAL NETWORK WILL BE TAUGHT BY GROWING GAAS/ALGAAS SUPERLATTICES USING THE CONVENTIONAL TECHNIQUES. SUBSEQUENTLY, THE NEURAL NETWORK WILL BE ALLOWED TO TAK ...

RELIABLE OBJECT-BASED CONTROL SOFTWARE (ROCS) ISA PROGRAMMING TECHNOLOGY THAT CAN BE COMBINED WITH BOTH INDUSTRIAL PROGRAMMABLE CONTROLLERS AND POWERFUL RISC BASED PROCESSORS TO CONSTRUCTFLEXIBLE CONTROL COMPONENTS OF GENERAL PURPOSE MACHINE TOOLS. ROCS ALSO SUPPORTS THE COMBINATION OF THOSE COMPONENTS INTO INNOVATIVE STATION, CELL, CENTER OR FACTORY AUTOMATION CONCEPTS. THE PROPOSED TECHNOLOGY WO ...

RAMAN SPECTROSCOPY IS AN EXCELLENT MEANS FOR NON-CONTACT PROBING OF QUALITY AND TEMPERATURE OF MANY MATERIALS (III-V SEMICONDUCTORS, DIAMONDS, ETC.) WHICH ARE GROWN IN CHEMICAL VAPOR DEPOSITION (CVD) REACTORS. IT CAN MEASURE COMPOSITION, TEMPERATURE, STRAIN, DEGREE OF CRYSTALLINITY, AND PRESENCE OF CONTAMINATION EX-SITU. AS AN OPTICAL PROBE IT CAN READILY PENETRATE THE HIGH PRESSURE GASES WHILE A ...

We will demonstrate the capability of scatterometry to provide a process monitor to post exposure bake of chemically amplified photoresist. Two or more scatterometers will be designed that are capable of monitoring the intensities of multiple diffraction orders that result from illuminating device patterns of photoresist. The goal is to demonstrate the capability of scatterometry to provide a PEB ...

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Many environmental pollutants, contaminants, poisonous gases, and hazardous materials are halogen-based chemicals in which they have chlorine or its family of elements in their molecular compositions. Pollutants in this family include many common chemicals found in the defense and the civilian sectors, e.g., trichloroethylene, polychlorinated biphenyl, and chlorofluorocarbons. These chemicals are ...