Now showing items 21-40 of 314

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      A note on uniformly dominated sets of summing operators  [Article]

      Delgado Sánchez, Juan Manuel; Piñeiro Gómez, Cándido (2002)
      Let Y be a Banach space that has no finite cotype and p a real number satisfying 1≤p<∞. We prove that a set ℳ⊂Πp(X,Y) is uniformly dominated if and only if there exists a constant C>0 such that, for every finite set ...
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      A parallel algorithm for skeletonizing images by using spiking neural P systems  [Article]

      Díaz Pernil, Daniel; Peña Cantillana, Francisco; Gutiérrez Naranjo, Miguel Ángel (Elsevier, 2013-09)
      Skeletonization is a common type of transformation within image analysis. In general, the image B is a skeleton of the black and white image A, if the image B is made of fewer black pixels than the image A, it does preserve ...
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      A particular case of extended isotopisms: Santilli's isotopisms  [Article]

      Falcón Ganfornina, Raúl Manuel; Núñez Valdés, Juan (Hadronic Press, 2006)
      Due to a mathematical necessity, it has been proved that it is convenient to give a new interpretation of the multiplicity of Santilli's isounity Ib = Ib(x, v, t, µ, ρ, ...) of any Santilli's isotopism, as a family of ...
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      A second order pvm flux limiter method. Application to magnetohydrodynamics and shallow stratified flows  [Article]

      Castro Díaz, Manuel Jesús; Fernández Nieto, Enrique Domingo; Narbona Reina, Gladys; Asunción, M. de la (Academic Press, 2014)
      In this work we propose a second order flux limiter finite volume method, named PVM-2U-FL, that only uses information of the two external waves of the hyperbolic system. This method could be seen as a natural extension of ...
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      A tool for integer homology computation: lambda-AT- model  [Article]

      González Díaz, Rocío; Jiménez Rodríguez, María José; Medrano Garfia, Belén; Real Jurado, Pedro (2011)
      In this paper, we formalize the notion of lambda-AT-model (where λ is a non-null integer) for a given chain complex, which allows the computation of homological information in the integer domain avoiding using the Smith ...
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      A two-layer shallow flow model with two axes of integration, well-balanced discretization and application to submarine avalanches  [Article]

      Delgado Sánchez, Juan Manuel; Bouchut, François; Fernández Nieto, Enrique Domingo; Mangeney, Anne; Narbona Reina, Gladys (Elsevier, 2020-04-01)
      We propose a two-layer model with two different axes of integration and a well-balanced finite volume method. The purpose is to study submarine avalanches and generated tsunamis by a depth-averaged model with different ...
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      A two-phase shallow debris flow model with energy balance  [Article]

      Bouchut, F.; Fernández Nieto, Enrique Domingo; Mangeney, A.; Narbona Reina, Gladys (2015)
      This paper proposes a thin layer depth-averaged two-phase model provided by a dissipative energy balance to describe avalanches of solid-fluid mixtures. This model is derived from a 3D two-phase model based on the equations ...
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      A two-phase solid-fluid model for dense granular flows including dilatancy effects: comparison with submarine granular collapse experiments  [Presentation]

      Bouchut, F.; Fernández Nieto, Enrique Domingo; Koné, E.H.; Mangeney, A.; Narbona Reina, Gladys (2017)
      We simulate here the collapse of granular columns immersed in a viscous fluid based on a simplified version of the model developed by [2]. The simulation quite well reproduces the dynamics and deposit of the granular ...
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      A two-phase two-layer model for fluidized granular flows with dilatancy effects  [Article]

      Bouchut, François; Fernández Nieto, Enrique Domingo; Mangeney, Anne; Narbona Reina, Gladys (Cambridge University Press, 2016)
      We propose a two-phase two-thin-layer model for fluidized debris flows that takes into account dilatancy effects, based on the closure relation proposed by Roux & Radjai (Physics of Dry Granular Media, 1998, Springer, pp. ...
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      A vanishing theorem for a class of logarithmic D-modules  [Article]

      Castro Jiménez, Francisco Jesús; Gago Vargas, J.; Hartillo Hermoso, Isabel; Ucha Enríquez, José María (Cornell University, 2007)
      Let OX (resp. DX) be the sheaf of holomorphic functions (resp. the sheaf of linear differential operators with holomorphic coefficients) on X = Cn. Let D X be a locally weakly quasi-homogeneous free divisor defined by ...
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      A well-balanced finite volume-augmented lagrangian method for an integrated Herschel-Bulkley model  [Article]

      Acary-Robert, C.; Fernández Nieto, Enrique Domingo; Narbona Reina, Gladys; Vigneaux, Paul (Plenum Press, 2012)
      We are interested in the derivation of an integrated Herschel-Bulkley model for shallow flows, as well as in the design of a numerical algorithm to solve the resulting equations. The goal is to simulate the evolution of ...
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      Algebraic computation of genetic patterns related to three-dimensional evolution algebras  [Article]

      Falcón Ganfornina, Óscar Jesús; Falcón Ganfornina, Raúl Manuel; Núñez Valdés, Juan (Elsevier, 2018-02-15)
      The mitosis process of an eukaryotic cell can be represented by the structure constants of an evolution algebra. Any isotopism of the latter corresponds to a mutation of genotypes of the former. This paper uses Computational ...
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      Algunas aplicaciones de las curvas de Bertrand  [Article]

      Núñez Valdés, Juan; González Herrera, Antonio (2008)
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      An algebraic approach to Integer Portfolio problems  [Article]

      Castro Jiménez, Francisco Jesús; Gago Vargas, Manuel Jesús; Hartillo Hermoso, Isabel; Puerto Albandoz, Justo; Ucha Enríquez, José María (2011-05-01)
      Integer variables allow the treatment of some portfolio optimization problems in a more realistic way and introduce the possibility of adding some natural features to the model. We propose an algebraic approach to ...
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      An aperiodic tiles machine  [Article]

      Cáceres González, José; Márquez Pérez, Alberto (2002)
      The results we introduce in this work lead to get an algorithm which produces aperiodic sets of tiles using Voronoi diagrams. This algorithm runs in optimal worst-case time O(nlogn). Since a wide range of new examples can ...
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      An application for gait recognition using persistent homology  [Article]

      Lamar León, Javier; García Reyes, Edel; González Díaz, Rocío; Alonso Baryolo, Raúl (Universidad de Sevilla, 2013)
      This Demo presents an application for gait recognition using persistent homology. Using a background subtraction approach, a silhouette sequence is obtained from a camera in a controlled environment. A border simplicial ...
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      An Application of Total-Colored Graphs to Describe Mutations in Non-Mendelian Genetics  [Article]

      Falcón Ganfornina, Raúl Manuel; Falcón Ganfornina, Óscar Jesús; Núñez Valdés, Juan (MDPI, 2019)
      Any gene mutation during the mitotic cell cycle of a eukaryotic cell can be algebraically represented by an isotopism of the evolution algebra describing the genetic pattern of the inheritance process. We identify any ...
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      An approach to the isotheory by means of extended pseudoisotopisms  [Article]

      Falcón Ganfornina, Raúl Manuel; Núñez Valdés, Juan (American Institute of Physics, 2016)
      Based on the traditional concept of isotopism, extended isotopisms were introduced by the authors in 2006 in order to provide a fundamental basis to the isotheory of Santilli. Since that first attempt, distinct studies on ...
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      An approximation property with respect to an operator ideal  [Article]

      Juan Manuel Delgado Sánchez; Cándido Piñeiro Gómez (Polskiej Akademii Nauk, Instytut Matematyczny, 2013)
      Given an operator ideal A, we say that a Banach space X has the approximation property with respect to A if T belongs to {S ◦T : S ∈F(X)} τc for every Banach space Y and every T ∈A(Y,X), τc being the topology of uniform ...
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      An Efficient Two-Layer Non-hydrostatic Approach for Dispersive Water Waves  [Article]

      Escalante, C.; Fernández Nieto, Enrique Domingo; Morales de Luna, Tomás; Castro Díaz, Manuel Jesús (Springer, 2019)
      In this paper, we propose a two-layer depth-integrated non-hydrostatic system with improved dispersion relations. This improvement is obtained through three free parameters: two of them related to the representation of ...