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Children and young people as virtual and interactive users and receivers

  • Campos, María
The speed in messages transmission and in the accesibility to the Internet and other technological advances have increased users and receivers intervention in mass media and have given us another way of interpersonal communication, the virtual one. This p
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CFD analysis of the roll movement of a container ship

  • García-Espinosa, Julio
  • Oñate, Eugenio
  • Helmers, Jens
  • Chakkor, Mohameed
In the present work a novel approach has been developed for the resolution of this problem of analysis of the movement of roll of a ship. The methodology used for this is based on the modification of the differential equations of the fluid dynamics (RANSE equations), including the movement of the free surface, by applying the finite calculus method. The modified equations are solved using an implicit predictor-corrector scheme and the finite element method (FEM). This resolution scheme is considered optimal for these types of problems, both in accuracy and in calculation time. As an example, it should be noted that for typical problems (more than 1,000,000 finite elements) less than 4 hours of CPU are required to solve several cycles of ship movement (Pentium IV). This allows the analysis of an array of tests in a few days or even hours, having a computer network or sufficient computing power.
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The particle finite element method. An overview

  • Oñate, E.
  • Idelsohn, S.R.
  • Pin, F.
  • Aubry, R.
We present a general formulation for analysis of fluid-structure interaction problems using the particle finite element method (PFEM). The key feature of the PFEM is the use of a Lagrangian description to model the motion of nodes (particles) in both the fluid and the structure domains. Nodes are thus viewed as particles which can freely move and even separate from the main analysis domain representing, for instance, the effect of water drops. A mesh connects the nodes defining the discretized domain where the governing equations, expressed in an integral from, are solved as in the standard FEM. The necessary stabilization for dealing with the incompressibility condition in the fluid is introduced via the finite calculus (FIC) method. A fractional step scheme for the transient coupled fluid-structure solution is described. Examples of application of the PFEM method to solve a number of fluid-structure interaction problems involving large motions of the free surface and splashing of waves are presented.
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Finite calculus formulation for incompressible solids using linear triangles and tetrahedra

  • Oñate, Eugenio
  • Rojek, J.
  • Taylor, RL
  • Zienkiewicz, OC
Many finite elements exhibit the so‐called ‘volumetric locking’ in the analysis of incompressible or quasi‐incompressible problems.In this paper, a new approach is taken to overcome this undesirable effect. The starting point is a new setting of the governing differential equations using a finite calculus (FIC) formulation. The basis of the FIC method is the satisfaction of the standard equations for balance of momentum (equilibrium of forces) and mass conservation in a domain of finite size and retaining higher order terms in the Taylor expansions used to express the different terms of the differential equations over the balance domain. The modified differential equations contain additional terms which introduce the necessary stability in the equations to overcome the volumetric locking problem. The FIC approach has been successfully used for deriving stabilized finite element and meshless methods for a wide range of advective–diffusive and fluid flow problems. The same ideas are applied in this paper to derive a stabilized formulation for static and dynamic finite element analysis of incompressible solids using linear triangles and tetrahedra. Examples of application of the new stabilized formulation to linear static problems as well as to the semi‐implicit and explicit 2D and 3D non‐linear transient dynamic analysis of an impact problem and a bulk forming process are presented.
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Possibilities of the particle finite element method for fluid-structure interaction problems with free surface waves

  • Oñate, Eugenio
  • Idelsohn, Sergio
  • Del Pin, Facundo
  • Aubry, Romain
We present a general formulation for analysis of fluid-structure interaction problems using the particle finite element method (PFEM). The key feature of the PFEM is the use of a Lagrangian description to model the motion of nodes (particles) in both the fluid and the structure domains. Nodes are thus viewed as particles which can freely move and even separate from the main analysis domain representing, for instance, the effect of water drops. A mesh connects the nodes defining the discretized domain where the governing equations, expressed in an integral from, are solved as in the standard FEM. The necessary stabilization for dealing with the incompressibility condition in the fluid is introduced via the finite calculus (FIC) method. A fractional step scheme for the transient coupled fluid-structure solution is described. Examples of application of the PFEM method to solve a number of fluid-structure interaction problems involving large motions of the free surface and splashing of waves are presented.
Proyecto:


The particle finite element method. An overview

  • Oñate, Eugenio
  • Idelsohn, Sergio
  • Del Pin, Facundo
  • Aubry, Romain
We present a general formulation for analysis of fluid-structure interaction problems using the particle finite element method (PFEM). The key feature of the PFEM is the use of a Lagrangian description to model the motion of nodes (particles) in both the fluid and the structure domains. Nodes are thus viewed as particles which can freely move and even separate from the main analysis domain representing, for instance, the effect of water drops. A mesh connects the nodes defining the discretized domain where the governing equations, expressed in an integral from, are solved as in the standard FEM. The necessary stabilization for dealing with the incompressibility condition in the fluid is introduced via the finite calculus (FIC) method. A fractional step scheme for the transient coupled fluid-structure solution is described. Examples of application of the PFEM method to solve a number of fluid-structure interaction problems involving large motions of the free surface and splashing of waves are presented.
Proyecto:


Ship hydrodynamics

  • Oñate, Eugenio
  • García-Espinosa, Julio
  • Idelsohn, Sergio
This chapter presents an overview of some computational methods for analysis of ship hydrodynamics problems. Attention is focused on the description of a stabilized finite element formulation derived via a finite calculus procedure. Both arbitrary Lagrangian-Eulerian (ALE) and fully Lagrangian forms are presented. Details of the treatment of the free-surface waves and the interaction between the ship structure and the sea water are also given. Examples of application to a variety of ship hydrodynamics problems are shown.
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Los oyentes en la construcción de la noticia. El caso del 11-M

  • Soler, Manuel
Radio in Spain went through a rather peculiar news-making process between the 11th and 14th of March. Shortly after the terrorist attacks on commuter trains in Madrid during which ETA was blamed, doubts about who was actually behind the bombings produced a crisis in the construction of the news characterized by the absence of a clear perpetrator. The debate on this phenomenon brought about an ideological struggle taken up by the general public who demonstrated their opposition to the information policy of Government. This article is an attempt to analyze the main features of this piece of radiophonic news and how the audience participated on the news-making process.
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Reviews Caplletra 37

  • diversos, Autors
Reviews Caplletra 37 (Autumn, 2004) Margarida Bassols Puig, ressenya de M. Teresa Espinal, Diccionari de sinònims de frases fetes, Barcelona, Servei de Publicacions de la Universitat Autònoma de Barcelona, Publicacions de la Universitat de València i Publicacions de l'Abadia de Montserrat, 2004. [CD-ROM incorporat]Àngel J. Gallego, ressenya del Diccionari Ballesta de Gramàtica Generativa, Monografia del Catalan Jornal of Linguistics, Bellaterra, Servei de Publicacions de la Universitat Autònoma de Barcelona, 2004.Mariola Aparicio, ressenya de Ferran Carbó & Vicent Simbor, Literatura catalana del siglo XX, Madrid, Síntesis, 2006.Pere Rosselló Bover, ressenya de Ferran Carbó, Enric Balaguer & Lluís  Messeguer (ed.), Vicent Andrés Estellés, Alacant, Institut Interuniversitari de Filologia Valenciana, 2004.
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Reviews Caplletra 36

  • diversos, Autors
Reviews Caplletra 36 (Spring, 2004)Annamaria Annicchiarico, ressenya de Josep Lluís Martos,  Les proses mitològiques de Joan Roís de Corella. Edició crítica, Alacant/Barcelona, Institut Interuniversitari de Filologia Valenciana / Publicacions de l'Abadia de Montserrat, 2001, 477 pp.Ferran Carbó, ressenya de Jordi Berenguer i Queraltó, Els inicis poètics de Miquel Martí i Pol (1944-1951), Barcelona, Publicacions de l'Abadia de Montserrat, 2002.Magí Sunyer, ressenya de Miquel Nicolás (ed.), Bernat i Baldoví i el seu temps, València, Universitat de València, 2002.Patrícia Alberola, ressenya d'Assumpció Bernal & Carme Gregori (ed.), Realisme i compromís en la narrativa de postguerra europea, Barcelona, Publicacions de l'Abadia de Montserrat, 2002.Lenke Kovácks, ressenya de Joan Castaño García, Aproximacions a la Festa d'Elx, Alacant, Institut Alacantí de Cultura «Juan Gil-Albert», 2001.Sandra Montserrat i Buendia, ressenya de Joan Solà, Maria-Rosa Lloret, Joan Mascaró & Manuel Pérez Saldanya (dir.), Gramàtica del català contemporani, Barcelona, Empúries, 2002.
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