A posteriori analysis of a positive streamwise invariant discretization of a convection-diffusion equation

We consider the finite element discretization of a convection-diffusion equation, where the convection term is handled via a fluctuation splitting algorithm. We prove a posteriori error estimates which allow us to perform mesh adaptivity in order to optimize the discretization of these equations. Numerical results confirm the interest of such an approach.Nous considérons une discrétisation par éléments finis d’une équation de convection-diffusion, où un algorithme de décentrage est utilisé pour traiter le terme de convection. Nous prouvons des estimations d’erreur a posteriori qui permettent d’adapter le maillage pour optimiser la discrétisation de ces équations. Des résultats numériques confirment l’intérêt d’une telle approche.Junta de Andalucí

Músicas al límite

Los límite de la música dependen de su propia definición y de su carácter humano. El empleo de sonido animal ha sido una constante a lo largo del tiempo y es una variante del empleo o miméis de sonidos naturales. La ampliación de los sonidos musicales hacia el ruido es otro de los límites desbordados ya sea ruidoo natural ,que nos lleva a la concepción moderna del paisaje sonoro o artificial que va desde los distintos bruitismos al sonido electrónico. También la naturaleza matemática de música ha puesto límites que se han ido traspasando y uno de los límite últimos es el del propio vacío sonoro, el silencio absoluto como música

Creación musical y medios de comunicación

Este trabajo trata sobre la relación histórica que ha existido entre las vanguardias musicales españolas y los medios de comunicación. El autor analiza cómo los movimientos de vanguardia musicales fueron seguidos con interés por las revistas y periódicos durante los años 60. A esto contribuyó la aparición de la radio pública, concretamente Radio Nacional de España. Con la llegada de la democracia, aparecieron las orquestas y surgió un nuevo público interesado por la música culta, pero, debido a la comercialización, el panorama musical español se ha banalizado, tal vez por el desinterés de los medios de comunicación.____________________________This paper deals with the historical relationship existing between the musical Spanish avantgardes and the mass media. The author analyzes how the avantgardes musical movements were followed with interest by the magazines and newspapers during the 60s. The appearance of RNE (Radio Nacional de España) promoted the knowledge of these avantgardes. With the arrival of democracy, the orchestras appeared and then a new audience interested in classical music arose, but, due to the marketing, the musical spanish panorama has been trivialized, maybe because of the disinterest of the mass media

Predicciones de calidad del aire a alta resolución en el Mediterráneo occidental para los proyectos MACC, MACC-II y MACC-III

The European Earth observation programme Copernicus, formerly known as GMES (Global Monitoring for Environment and Security) is establishing a core global and regional environmental tmospheric service as a component of the Europe’s Copernicus/GMES initiative through successive R&D projects led by ECMWF (European Center for Medium-range Weather Forecasting) and funded by the 6th and 7th European Framework Programme for Research and Horizon 2020 Programme: GEMS, MACC, MACC-II and MACC-III. AEMET (Spanish State Meteorological Agency) has participated in the projects MACC and MACC-II and continues participating in MACC-III (http://atmosphere.copernicus.eu). AEMET has contributed to those projects by generating highresolution (0.05 degrees) daily air-quality forecasts for the Western Mediterranean up to 48 hours aiming to analyse the dependence of the quality of forecasts on resolution. We monitor the evolution of different chemical species such as NO2, O3, CO y SO2 at surface and different vertical levels using the global model MOCAGE and the MACC Regional Ensemble forecasts as chemical boundary conditions. We will show different case-studies, where the considered chemical species present high values and will show a validation of the air-quality by comparing to some of the available air-quality observations (EMEP/GAW, regional -autonomous communities- and local -city councils- air-quality monitoring networks) over the forecast domain. The aim of our participation in these projects is helping to improve the understanding of the processes involved in the air-quality forecast in the Mediterranean where special factors such as highly populated areas together with an intense solar radiation make air-quality forecasting particularly challenging

Coping Strategies against peer victimization: differences according to gender, grade, victimization status and perceived classroom social climate

The Sustainable Development Goals (SDGs) include 'Good Health andWell-being' (SDG3) and 'Quality Education' (SDG4). Nevertheless, many students cannot achieve these goals if they suffer peer victimization at their schools, and intervention programs to reduce it are necessary. These programs should consider the possible differences in the coping strategies preferred by students according to some personal (e.g., gender, grade, victimization status) and contextual (e.g., perceived classroom social climate) factors to be more effective. Therefore, the objective of this study was to analyze the possible differences in the coping strategies preferred by students (ask a friend for help, ask a teacher for help, ask parents for help, not ask anyone for help, fighting back, avoid the aggressor and ask the aggressor why) to handle situations of relational, physical and verbal peer victimization according to their gender, school grade, victimization status and perceived classroom social climate. The sample comprised 479 students (52.2% boys, 47.8% girls) aged from 9 to 14 years (M = 11.21, SD = 1.52). The results showed that girls chose the strategies of asking friends or adults for help and asking the aggressor why more than boys, while boys chose the strategies of fighting back and not ask anyone for help more than girls. The coping strategy of asking a teacher for help was preferred more by students of lower school grades and by students with a positive perception of the classroom climate. Victimized students preferred the strategy of not asking anyone for help. These results may be useful for developing more effective intervention programs. These programs should aim to enhance the teacher-student relationship in upper school grades, help victimized students to inform about peer aggression situations and improve perceived classroom social climate

Socialising around media. Improving the second screen experience through semantic analysis, context awareness and dynamic communities

SAM is a social media platform that enhances the experience of watching video content in a conventional living room setting, with a service that lets the viewer use a second screen (such as a smart phone) to interact with content, context and communities related to the main video content. This article describes three key functionalities used in the SAM platform in order to create an advanced interactive and social second screen experience for users: semantic analysis, context awareness and dynamic communities. Both dataset-based and end user evaluations of system functionalities are reported in order to determine the effectiveness and efficiency of the components directly involved and the platform as a whole