Now showing items 102-121 of 314

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      Efficient GPU implementation of a two waves TVD-WAF method for the two-dimensional one layer Shallow Water system on structured meshes.  [Article]

      Asunción, M. de la; Castro Díaz, Manuel Jesús; Fernández Nieto, Enrique Domingo; Mantas, José Miguel; Ortega Acosta, Sergio; González Vida, José Manuel (Elsevier, 2013)
      The numerical solutions of shallow water equations are useful for applications related to geophysical flows that usually take place in large computational domains and could require real time calculation. Therefore, parallel ...
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      Efficient numerical schemes for viscoplastic avalanches. Part 1: The 1D case.  [Article]

      Fernández Nieto, Enrique Domingo; Gallardo, José M.; Vigneaux, Paul (Elsevier, 2014)
      This paper deals with the numerical resolution of a shallow water viscoplastic flow model. Viscoplastic materials are characterized by the existence of a yield stress: below a certain critical threshold in the imposed ...
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      Efficient numerical schemes for viscoplastic avalanches. Part 2: the 2D case  [Article]

      Fernández Nieto, Enrique Domingo; Gallardo, José M.; Vigneaux, Paul (Elsevier, 2018)
      This paper deals with the numerical resolution of a shallow water viscoplastic flow model. Viscoplastic materials are characterized by the existence of a yield stress: below a certain critical threshold in the imposed ...
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      Efficiently Storing Well-Composed Polyhedral Complexes Computed Over 3D Binary Images  [Article]

      González Díaz, Rocío; Jiménez Rodríguez, María José; Medrano Garfia, Belén (Springer, 2017)
      A 3D binary image I can be naturally represented by a combinatorial-algebraic structure called cubical complex and denoted by Q(I ), whose basic building blocks are vertices, edges, square faces and cubes. In Gonzalez-Diaz et ...
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      Embedding a graph in the grid of a surface with the minimum number of bends is NP-hard  [Article]

      Garrido Vizuete, María de los Angeles; Márquez Pérez, Alberto (1997)
      This paper is devoted to the study of graph embeddings in the grid of non-planar surfaces. We provide an adequate model for those embeddings and we study the complexity of minimizing the number of bends. In particular, we ...
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      Embedding cocylic D-optimal designs in cocylic Hadamard matrices  [Article]

      Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Gudiel Rodríguez, Félix (International Linear Algebra Society, 2012)
      A method for embedding cocyclic submatrices with “large” determinants of orders 2t in certain cocyclic Hadamard matrices of orders 4t is described (t an odd integer). If these determinants attain the largest possible ...
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      Enumeration and classification of self-orthogonal partial Latin rectangles by using the polynomial method  [Article]

      Falcón Ganfornina, Raúl Manuel (Elsevier, 2015)
      The current paper deals with the enumeration and classification of the set SORr,n of self-orthogonal r × r partial Latin rectangles based on n symbols. These combinatorial objects are identified with the independent sets ...
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      Equations, inequations and inequalities characterizing the configurations of two real projective conics  [Article]

      Briand, Emmanuel (Springer, 2007)
      Couples of proper, non-empty real projective conics can be classified modulo rigid isotopy and ambient isotopy. We characterize the classes by equations, inequations and inequalities in the coefficients of the quadratic ...
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      Equivalences of Zt×Z22-cocyclic Hadamard matrices  [Article]

      Álvarez Solano, Víctor; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Horadam, K.J.; Rao, A. (Cornell University, 2015)
      One of the most promising structural approaches to resolving the Hadamard Conjecture uses the family of cocyclic matrices over Zt × Z2 2. Two types of equivalence relations for classifying cocyclic matrices over Zt × ...
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      Error estimates of a linear decoupled Euler–FEM scheme for a mass diffusion model  [Article]

      Guillén González, Francisco Manuel; Gutiérrez Santacreu, Juan Vicente (Springer, 2011)
      We present error estimates of a linear fully discrete scheme for a threedimensional mass diffusion model for incompressible fluids (also called Kazhikhov– Smagulov model). All unknowns of the model (velocity, pressure ...
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      ¿Es posible geogebrizar una olimpiada matemática?  [Article]

      Barrena Algara, Eva; Falcón Ganfornina, Raúl Manuel; Ramírez Campos, Rosana; Rios Collantes de Terán, Ricardo (Sociedad Andaluza de Educación Matemática Thales, 2010)
      En la presente comunicación se pretende abordar la resolución dinámica de algunos de los problemas geométricos que han aparecido en las diferentes fases desarrolladas en las veinticinco ediciones de la Olimpiada Matemática ...
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      Estimating building construction costs by production processes  [Article]

      Montes Delgado, María Victoria de; Falcón Ganfornina, Raúl Manuel; Ramírez de Arellano Agudo, Antonio (2014)
      Building actors need accurate estimates in order to efficiently undertake the construction of buildings. The knowledge of real expected costs of construction works is a necessary condition for contractors to submit ...
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      Estimating building construction costs: analysis of the processbasedbudget model (POP Model)  [Article]

      Falcón Ganfornina, Raúl Manuel; Montes Delgado, María Victoria de; Ramirez de Arellano Agudo, Antonio (Pontificia Universidad Católica de Chile, 2016-04)
      The recent economic crisis suffered by the Spanish construction sector has brought to light its excessive vulnerability to fluctuations in the real estate market.Overcoming this situation requires to innovate the sector ...
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      Un estudio de esquemas bien equilibrados en sistemas hiperb∂olicos no homog∂eneos.  [Article]

      Fernández Nieto, Enrique Domingo (Sociedad Española de Matemática Aplicada, 2005)
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      Estudio de la Isotopología de Tsagas-Sourlas-Santilli  [Article]

      Falcón Ganfornina, Raúl Manuel; Núñez Valdés, Juan (Hadronic Press, 2003)
      Since his original proposal of 1978 to study Lie-isotopic and Lie-admissible liftings of conventional, local-differential Hamiltonian formulations of point particles, the physicist R. M. Santilli suggested the contribution ...
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      Estudio sobre un problema de la XXIV Olimpiada Matemática Thales  [Article]

      Amaro Parrado, Manuel; Falcón Ganfornina, Raúl Manuel; González Ternero, Francisco Miguel; Peñas Troyano, María (Sociedad Andaluza de Educación Matemática Thales, 2009)
      En el presente artículo nos proponemos analizar uno de los problemas propuestos al alumnado de 2º de E.S.O. que participó en la vigésimo cuarta edición de la fase regional de la Olimpiada Matemática Thales, la cual ha ...
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      Euclidean position in Euclidean 2-orbifolds  [Article]

      Cortés Parejo, María del Carmen; Márquez Pérez, Alberto; Valenzuela Muñoz, Jesús (2004)
      Intuitively, a set of sites on a surface is in Euclidean position if points are so close to each other that planar algorithms can be easily adapted in order to solve most of the classical problems in Computational Geometry. ...
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      Exact cost minimization of a series-parallel reliable system with multiple component choices using an algebraic method  [Article]

      Gago Vargas, Manuel Jesús; Hartillo Hermoso, Isabel; Puerto Albandoz, Justo; Ucha Enríquez, José María (2013-11)
      The redundancy allocation problem is formulated minimizing the design cost for a series-parallel system with multiple component choices while ensuring a given system reliability level. The obtained model is a nonlinear ...
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      Existence of a global weak solution for a 2d viscous bi-layer Shallow Water model  [Article]

      Zabsonré, J.D.; Narbona Reina, Gladys (Elsevier Science, 2009)
      We consider a non-linear viscous bi-layer shallow water model with capillarity effects and extra friction terms in a two-dimensional space. This system is issued from a derivation of three-dimensional Navier–Stokes equations ...
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      Explicit Comparison Theorems for D -modules  [Article]

      Castro Jiménez, Francisco Jesús; Ucha Enríquez, José María (Elsevier, 2001)
      We prove in an explicit way a duality formula between two A2-modules Mlog and Mflog associated to a plane curve and we give an application of this duality to the comparison between Mflog and the A2-module of rational ...