Prensado, con métodos de la cerámica plana, de piezas cerámicas curvas con especificaciones geométricas de elevada precisión

In order to obtain high-precision three-dimensional pieces by dry pressing, two approaches were studied: modelling the material flow and strain during pressing; and evaluating the bulk density (Da) distribution in a pressed piece and using shrinkage models that allow the post-firing geometry to be predicted. It would thus become possible to act in the design phase (functional geometry and rear) and in the process. This paper describes the studies carried out to predict the final geometry of three-dimensional pieces of the sheet type obtained by conventional pressing techniques, from the Da distribution in each point of the piece. For this purpose, pieces were modelled using finite element method (FEM), applying simulation processes to obtain the strain at each point of the piece as a function of its Da. The experimental validation was performed using the X-ray absorption method for Da and a CMM (coordinate measuring machine) for the geometr

Cooling tank break simulation with CARPA and GID software: GID 2008

A wall break simulation of a cooling tank in a thermoelectric plant was performed using two methods: The CARPA software (finite volume) in GiD environment and a 2D program (finite differences). The software CARPA applied with the GiD pre and post processor showed to be a powerful tool in animating the flood plans, with purposes related to interpretation of results in civil protection in a temporal and spatial way as well as to define the possible affected zones due to phenomena such as walls break.Postprint (published version

Narrative and Interpretation on Twitter: Reading tweets by telling stories

Existing research on communication on Twitter has largely ignored the question of how users make sense of the fragmentary tweets with which they are presented. Focusing on the use of Twitter for political reporting in post-revolutionary Egypt, this article argues that the production of mental stories provides readers with a mechanism for interpreting the meaning of individual tweets in terms of their relationships to other material. Drawing on contemporary narratology, it argues that Twitter exhibits key elements of narrativity, but that a creative reading process is nonetheless required to transform this incipient narrativity into coherent, sense-making mental narratives. This foregrounding of the reader’s creative role makes stories on Twitter highly fluid and dynamic. Through reference to classic critical theory, I propose that this nonetheless represents an evolution rather than a radical break from earlier forms of narrative reception, which in many cases demanded similarly creative reading practices