4,735 research outputs found

    Lattices from Codes for Harnessing Interference: An Overview and Generalizations

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    In this paper, using compute-and-forward as an example, we provide an overview of constructions of lattices from codes that possess the right algebraic structures for harnessing interference. This includes Construction A, Construction D, and Construction πA\pi_A (previously called product construction) recently proposed by the authors. We then discuss two generalizations where the first one is a general construction of lattices named Construction πD\pi_D subsuming the above three constructions as special cases and the second one is to go beyond principal ideal domains and build lattices over algebraic integers

    A method for monitoring the variability in nuclear absorption characteristics of aviation fuels

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    A technique for monitoring variability in the nuclear absorption characteristics of aviation fuels has been developed. It is based on a highly collimated low energy gamma radiation source and a sodium iodide counter. The source and the counter assembly are separated by a geometrically well-defined test fuel cell. A computer program for determining the mass attenuation coefficient of the test fuel sample, based on the data acquired for a preset counting period, has been developed and tested on several types of aviation fuel
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