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Author: search.filters.author.Durán Márquez, Mariana

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    Optimized Filling of a Given Cuboid with Spherical Powders for Additive Manufacturing
    (2020)
    Duriagina, Zoya
    ;
    Lemishka, Igor
    ;
    Litvinchev, Igor
    ;
    Durán Márquez, Mariana
    ;
    Pankratov, Alexander
    In additive manufacturing (also known as 3D printing), a layer-by-layer buildup process is used for manufacturing parts. Modern laser 3D printers can work with various materials including metal powders. In particular, mixing various-sized spherical powders of titanium alloys is considered most promising for the aerospace industry. To achieve desired mechanical properties of the final product, it is necessary to maintain a certain proportional ratio between different powder fractions. In this paper, a modeling approach for filling up a rectangular 3D volume by unequal spheres in a layer-by-layer manner is proposed. A relative number of spheres of a given radius (relative frequency) are known and have to be fulfilled in the final packing. A fast heuristic has been developed to solve this special packing problem. Numerical results are compared with experimental findings for titanium alloy spherical powders. The relative frequencies obtained by using the imposed algorithm are very close to those obtained by the experiment. This provides an opportunity for using a cheap numerical modeling instead of expensive experimental study. © Springer Nature
    Scopus© Citations 31  7  1
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    A.L.L. Y.O.U. N.E.E.D. I.S. L.O.V.E. Manual on health self-management and patient-reported outcomes among low-income young adult Mexicans on chronic dialysis: Feasibility study
    (2022)
    Brito-Suárez, Juliette Marie
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    Medina-Hernández, Elba
    ;
    Medeiros, Mara
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    ;
    Morales-Buenrostro, Luis Eduardo
    We evaluated disease knowledge/self-management skills among low-income Mexican young adults maintained on dialysis and to test the effectiveness of the A.L.L. Y.O.U. N.E.E.D. I.S. L.O.V.E (AYNIL) Manual – Spanish Version on patient-reported outcomes. This is a low literacy teaching tool designed with patients and educators' input.
    Scopus© Citations 2  12  1