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Computational Support for Technology- Investment Decisions

Strategic Assessment of Risk and Technology (START) is a user-friendly computer program that assists human managers in making decisions regarding research- and- development investment portfolios in the presence of uncertainties and of non- technological constraints that include budgetary and time limits, restrictions related to infrastructure, and programmatic and institutional priorities. START facilitates quantitative analysis of technologies, capabilities, missions, scenarios and programs, and thereby enables the selection and scheduling of value-optimal development efforts. START incorporates features that, variously, perform or support a unique combination of functions, most of which are not systematically performed or supported by prior decision-support software. These functions include the following:

Posted in: Software, Briefs, TSP

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Algorithm-Based Fault Tolerance for Numerical Subroutines

A software library implements a new methodology of detecting faults in numerical subroutines, thus enabling application programs that contain the subroutines to recover transparently from single-event upsets. The software library in question is fault-detecting middleware that is wrapped around the numerical- subroutines. Conventional serial versions (based on LAPACK and FFTW) and a parallel version (based on ScaLAPACK) exist. The source code of the application program that contains the numerical subroutines is not modified, and the middleware is transparent to the user.

Posted in: Software, Briefs

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Advanced Ultra-Thin Integrated Electronics on Membranes

Flexible integrated circuits are integrated with other circuitry on flexible membranes. A method of fabricating flexible assemblies comprising flexible integrated circuits bonded onto or into flexible membranes has been developed. The method provides for bonding of thinned (more specifically, thin enough to be flexible) integrated-circuit chips to the membranes and for electrical connection of the integrated circuits to other circuitry on or in the membranes. The method is expected to enable the further development of a variety of membrane-based flexible, lightweight electronic systems and assemblies — for example, phasedarray antenna assemblies comprising integrated-circuit transmitting/ receiving (T/R) modules further integrated with arrays of transmission lines and antenna radiator elements.

Posted in: Semiconductors & ICs, Briefs

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Electrophoretic Deposition on Porous Non-Conductors

EPD is simplified and made more widely applicable. A method of electrophoretic deposition (EPD) on substrates that are porous and electrically non-conductive has been invented. Heretofore, in order to perform an EPD, it has been necessary to either (1) use a substrate material that is inherently electrically conductive or (2) subject a non-conductive substrate to a thermal and/or chemical treatment to render it conductive.

Posted in: Manufacturing & Prototyping, Briefs, TSP

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Freeze Tape Casting of Functionally Graded Porous Ceramics

Pore structures can be tailored in ways heretofore impossible. Freeze tape casting is a means of making preforms of ceramic sheets that, upon subsequent completion of fabrication processing, can have anisotropic and/or functionally graded properties that notably include aligned and graded porosity. Freeze tape casting was developed to enable optimization of the microstructures of porous ceramic components for use as solid oxide electrodes in fuel cells: Through alignment and grading of pores, one can tailor surface areas and diffusion channels for flows of gas and liquid species involved in fuel-cell reactions. Freeze tape casting offers similar benefits for fabrication of optimally porous ceramics for use as catalysts, gas sensors, and filters.

Posted in: Manufacturing & Prototyping, Briefs, TSP

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Modeling Metamaterials Leads to Advance in Cloaking System Prototype

In efforts to use metamaterials to construct the world’s first working prototype of an invisibility cloak, researchers relied on multiphysics software. Modeling software is generally used to show the fields and flows that are impossible to see with the eye or instruments. A group of researchers has done just the opposite: They ran computer simulations that showed it should be possible to fabricate the metamaterials necessary to build an “invisibility cloak” that makes an object invisible to certain frequencies.

Posted in: Materials, Briefs

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From Killer Gas to Cure



Posted in: Blog

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