SPH simulations of thixo-viscoplastic fluid flow past a cylinder

Thixotropic materials are complex fluids that display time-dependent viscosity and/or yield-stress response upon the application of a fixed deformation, while recovering their original structured-state when the deformation is discontinued. Thixotropic effects are presents in many different systems and applications, ranging from food products, such as ketchup, to metals, such as molten aluminum. In this work we present a first attempt to simulate the rheological properties of thixo-viscoplastic flows using a Smoothed Particle Hydrodynamic (SPH) method. The study set up is a 2D flow around a circular cylinder as well as a simple shear flow between parallel plates to validate our numerical results. SPH solutions are compared with simulations performed using the open-source Finite Volume Method solver RheoTool, based on OpenFOAM. The viscoplastic model used in this work is the Papanastasiou model combined with a recently developed microstructural one, in order to include thixotropy. In this thixo-viscoplastic framework, we analyze the flow properties in terms of yield-fronts, streamlines and structure-parameter fields at different Bingham and Thixotropy numbers, through microstructural thixotropic and yield-stress parameters variation. Obtained results show an important novelty: an asymmetry in the thixo-viscoplastic flow around the cylinder

Propuesta de alfabetización mediática ante los estereotipos de género en los medios de comunicación: resultados y valoración de “rostros de mujer”

Educating today's society requires moving towards to new forms of literacy that promote a critical attitude towards the media, as a responsibility shared by various actors. In this paperwork, we propose an innovative resource to improve media education, aimed at different groups, addressing gender stereotypes that appear in different media of communication through the virtual chat rooms called "Faces of Women". Below you can find the results obtained after its implementation, and the evaluation of a group of experts who have been interviewed. The results allow us to make progress towards achieving citizenship media, which interacts with the media, critically analyzing messages and screens, due to the development of media skills

Conectar con el público: diseño estratégico de las comunidades de usuarios por la TV

The challenges of human interaction go through the basic need to connect. TV digitization resulted in a converged environment that strengthens the "de-massification of the mass media". The increasingly personalized, targeted, shared and commented consumption require strategies to connect directly to each user, while seeking his own connection with other public and with the media. This article is part of the strategic interests of the user communities in the converging TV, especially among the millennial audience. We conclude that have barely yet developed its potential and opens an avenue of discussion to improve the connection between the transmedia programming and audiences

Propuesta de alfabetización mediática ante los estereotipos de género en los medios de comunicación: resultados y valoración de “rostros de mujer”

Educating today's society requires moving towards to new forms of literacy that promote a critical attitude towards the media, as a responsibility shared by various actors. In this paperwork, we propose an innovative resource to improve media education, aimed at different groups, addressing gender stereotypes that appear in different media of communication through the virtual chat rooms called "Faces of Women". Below you can find the results obtained after its implementation, and the evaluation of a group of experts who have been interviewed. The results allow us to make progress towards achieving citizenship media, which interacts with the media, critically analyzing messages and screens, due to the development of media skills

Conectar con el público: diseño estratégico de las comunidades de usuarios por la TV

The challenges of human interaction go through the basic need to connect. TV digitization resulted in a converged environment that strengthens the "de-massification of the mass media". The increasingly personalized, targeted, shared and commented consumption require strategies to connect directly to each user, while seeking his own connection with other public and with the media. This article is part of the strategic interests of the user communities in the converging TV, especially among the millennial audience. We conclude that have barely yet developed its potential and opens an avenue of discussion to improve the connection between the transmedia programming and audiences

Magnetic and structural-properties of electrodeposited Co1-xPx amorphous ribbons

The specific magnetic moment, coercive force, anisotropy field, and saturation magnetostriction constant have been measured in Co(1-x)P(x) amorphous ribbons with 0.04 less-than-or-equal-to x less-than-or-equal-to 0.27. Differential scanning calorimetry, x-ray diffraction, and transmission electron microscopy analysis have been made in order to study the transition from the amorphous state to the crystalline one. Results suggest that transition takes place when x decreases from 0.19

Primary Angioplasty in a Catastrophic Presentation: Acute Left Main Coronary Total Occlusion—The ATOLMA Registry

Objectives. To determine the outcome predictors of in-hospital mortality in acute total occlusion of the left main coronary artery (ATOLMA) patients referred to emergent angioplasty and to describe the clinical presentation and the long-term outcome of these patients.Background. ATOLMA is an uncommon angiographic finding that usually leads to a catastrophic presentation. Limited and inconsistent data have been previously reported regarding true ATOLMA, yet comprehensive knowledge remains scarce.Methods. This is a multicenter retrospective cohort that includes patients presenting with myocardial infarction due to a confirmed ATOLMA who underwent emergency percutaneous coronary intervention (PCI).Results. In the period of the study, 7930 emergent PCI were performed in the five participating centers, and 46 of them had a true ATOLMA (0.58%). At admission, cardiogenic shock was present in 89% of patients, and cardiopulmonary resuscitation was required in 67.4%. All the patients had right dominance. Angiographic success was achieved in 80.4% of the procedures, 13 patients (28.2%) died during the catheterization, and the in-hospital mortality rate was 58.6% (27/46). At one-year and at the final follow-up, 18 patients (39%) were alive, including four cases successfully transplanted. Multivariate analysis showed that postprocedural TIMI flow was the only independent predictor of in-hospital mortality (OR 0.23, (95% CI 0.1-0.36),p<0.001).Conclusions. Our study confirms that the clinical presentation of ATOLMA is catastrophic, presenting a high in-hospital mortality rate; nevertheless, primary angioplasty in this setting is feasible. Postprocedural TIMI flow resulted as the only independent predictor of in-hospital mortality. In-hospital survivors presented an encouraging outcome. ATOLMA and left dominance could be incompatible with life

The Air Microwave Yield (AMY) experiment - A laboratory measurement of the microwave emission from extensive air showers

The AMY experiment aims to measure the microwave bremsstrahlung radiation (MBR) emitted by air-showers secondary electrons accelerating in collisions with neutral molecules of the atmosphere. The measurements are performed using a beam of 510 MeV electrons at the Beam Test Facility (BTF) of Frascati INFN National Laboratories. The goal of the AMY experiment is to measure in laboratory conditions the yield and the spectrum of the GHz emission in the frequency range between 1 and 20 GHz. The final purpose is to characterise the process to be used in a next generation detectors of ultra-high energy cosmic rays. A description of the experimental setup and the first results are presented.Comment: 3 pages -- EPS-HEP'13 European Physical Society Conference on High Energy Physics (July, 18-24, 2013) at Stockholm, Swede