4+1 exercises combinatorial space: mat-building Frankfurt Berlín Venecia Kuwait Valencia

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Recent developments for the calculation of elastic and non-elastic breakup of weakly-bound nuclei

In this contribution, we review some recent theoretical advances for the calculation of breakup cross sections in reactions induced by weakly-bound nuclei.Ministerio de Economía y Competitividad FIS2013-41994-P, CSD2007-00042Junta de Andalucía FQM160, P07-FQM-02894European Commission 60037

Electrodeposited Ni-rich Ni-Pt mesoporous nanowires for selective and efficient formic acid-assisted hydrogenation of levulinic acid to γ-valerolactone

In pursuit of friendlier conditions for the preparation of high-value biochemicals, we developed a catalytic synthesis of -valerolactone by levulinic acid hydrogenation with formic acid as the hydrogen source. Both levulinic and formic acid are intermediate products in the biomass transformation processes. The objective of the work is two-fold; development of a novel approach for milder synthesis conditions to produce -valerolactone and the reduction of the economic cost of the catalyst. Ni-rich Ni-Pt mesoporous nanowires were synthesized in an aqueous medium using a combined hard-soft template-assisted electrodeposition method, in which porous polycarbonate membranes controlled the shape, and the pluronic P-123 copolymer served as the porogen agent. The electrodeposition conditions selected favored nickel deposition and generated nanowires with nickel percentages above the 75 at. %. The increase in deposition potential favored nickel deposition. However, it was detrimental for the porous diameter, because the mesoporous structure is promoted by the presence of the platinum-rich micelles near the substrate, which is not favored at the more negative potentials. The prepared catalysts promoted the complete transformation to -valerolactone in a yield of around 99% and proceeded with the absence of by-products. The couple temperature and reaction time were optimized considering the energy cost. The threshold operational temperature was established at 140 ºC, at which, 120 minutes were sufficient for attaining the complete transformation. Working temperatures below 140 ºC rendered the reaction completion difficult. The Ni78Pt22 nanowires exhibited excellent reusability, with minimal nickel leaching into the reaction mixture, whereas those with higher nickel contents showed corrosion

Electrodeposition of mesoporous Ni-rich Ni-Pt films for highly efficient methanol oxidation

The use of soft templates for the electrosynthesis of mesoporous materials has shown tremendous potential in energy and environmental domains. Among all the approaches that have been featured in the literature, block copolymer-templated electrodeposition had robustness and a simple method, but it practically cannot be used for the synthesis of mesoporous materials not based on Pt or Au. Nonetheless, extending and understanding the possibilities and limitations of block copolymer-templated electrodeposition to other materials and substrates is still challenging. Herein, a critical analysis of the role of the solution's primary electroactive components and the applied potential were performed in order to understand their influences on the mesostructure of Ni-rich Ni-Pt mesoporous films. Among all the components, tetrahydrofuran and a platinum (IV) complex were shown to be crucial for the formation of a truly 3D mesoporous network. The electrosynthesized well-ordered mesoporous Ni-rich Ni-Pt deposits exhibit excellent electrocatalytic performance for methanol oxidation in alkaline conditions, improved stability and durability after 1000 cycles, and minimal CO poisoning

Simple environmentally-friendly reduction of 4-nitrophenol

Abstract: 4-nitrophenol is a low molecular-mass organic compound involved in many chemical processes and commonly present in soils and in surface and ground waters, thereby causing severe environmental impact and health risk. Several methods have been proposed for its transformation (bio and chemical degradation). However, these strategies not only produce equally or more toxic aromatic species but also require harsh operating conditions and/or time-consuming treatments. In this context, we report a comprehensive and systematic study of the electrochemical reduction of 4-nitrophenol as a viable alternative. We have explored the electrochemical reduction of this pollutant over different metallic and carbonaceous substrata. Specifically, we have focused on the use of gold and silver working electrodes since they combine a high electrocatalytic activity for 4-nitrophenol reduction and a low electrocatalytic capacity for hydrogen evolution. The influence of the pH, temperature, and applied potential have also been considered as crucial parameters in the overall optimization of the process. While acidic media and high temperatures favor the clean reduction of 4-nitrophenol to 4-aminophenol, simultaneous hydrogen evolution results pernicious for this purpose. As a whole, a simple and effective electrochemical method for the transformation of 4-nitrophenol into 4-aminophenolis proposed with virtually no undesired by-products

4+1 Ejercicios de combinatoria espacial

¿Puede la arquitectura definirse desde los límites de unos principios de organización? ¿Puede un estudio de coincidencias programáticas convertirse, casi de forma inmediata, en la planta de un edificio? ¿Puede el proyecto tener como unidad de medida los minutos de marcha a pie de sus usuarios? Puede, cuando el proceso de proyecto se ha desprendido de la preocupación formal y el objetivo es ajeno a una imagen apriorística. Cabe prontamente señalar que estas posturas en firme no se adoptan por desplante a sus antecesores; la arquitectura de los años 60 se envuelve de un contexto específico.Domingo Calabuig, D.; Castellanos Gómez, R.; Ábalos Ramos, A. (2012). 4+1 Ejercicios de combinatoria espacial. DC PAPERS : Revista de Crítica y Teoría de la Arquitectura. 24:109-111. http://hdl.handle.net/10251/43571S1091112

Organização do saber no mundo da vida dos artistas professores

This article addresses on the configuration of artists who display the professional capital acquired for the purpose of participating in teaching and training new generations of professionals in the artistic field. The work is supported in interviews, as the central point in biographical-narrative perspective. First, authors assume the notion of savoir, as an effect of structuring cultural, social and professional capital, they also show three participants journey and the coordinates that guide the work of artists who teach. Later, authors expose the value of family relationships. where dispositions to assume certain trajectory are raised, an individual journey, a unique, unrepeatable path. In the description of the path traveled, the time spent incorporating skills of the artistic field that leads to the distinction of each of the members of the family nucleus is valued. In the same way, authors realize the meaning of being teachers in the artistic field, the desires and orientations that place them as active subjects in a given social field. Finally, authors present some reflections around the contingent of social action: relevance to a social group, position taking and adoption of projects in the configuration of the particular agent.Con apoyo en la entrevista, como vía regía en la perspectiva biográfico-narrativa, el presente texto bordea la configuración de artistas que despliegan el capital profesional adquirido con fines de participación en la docencia y la formación de nuevas generaciones de profesionales en el ámbito artístico. Primero, tomamos como derrotero la noción de saber, como efecto de la estructuración del capital cultural, social y profesional, para describir el recorrido efectuado por los tres participantes del estudio y a fin de definir las coordenadas que orientan la labor de los artistas docentes. Más adelante, exponemos el valor y la influencia de las relaciones familiares en la disposición que evidencian los individuos para asumir una determinada trayectoria, a pesar de la trayectoria de toda persona es un recorrido individual, un camino único irrepetible. En la descripción del camino recorrido se valora el tiempo empleado en la incorporación de las habilidades propias del ámbito artístico que lleva a la distinción de cada uno de los integrantes del núcleo familiar. De igual forma, damos cuenta del sentido que tiene ser docentes en el ámbito artístico, los deseos y orientaciones que los colocan como sujetos activos en un campo social determinado. Cerramos el texto con reflexiones alrededor de lo contingente de la acción social: pertenencia a un grupo social, las tomas de posición y la adopción de proyectos en la configuración del agente particularEste artigo trata da configuração de artistas que exibem o capital profissional adquirido com o propósito de participar do ensino e da formação de novas gerações de profissionais no campo artístico. O trabalho está amparado em entrevistas, como ponto central na perspectiva biográfico-narrativa. Primeiramente, os autores assumem a noção de conhecimento, como efeito da estruturação do capital cultural, social e profissional, mostram também a trajetória de três participantes e as coordenadas que norteiam o trabalho dos artistas-professores. Mais tarde, os autores expõem o valor das relações familiares. onde se levantam as disposições para assumir determinada trajetória, uma viagem individual, um caminho único e irrepetível. Na descrição do caminho percorrido, valoriza-se o tempo empleado na incorporação das competências do campo artístico que conduz à distinção de cada um dos membros do núcleo familiar. Da mesma forma, os autores expor o significado de ser professores no campo artístico, os desejos e orientações que os colocam como sujeitos ativos em um determinado campo social. O artigo se encerra com reflexões sobre o contingente da ação social: relevância para um grupo social, tomada de posição e adoção de projetos na configuração do agente particular

Prácticas computacionales y experimentales en la docencia de ingeniería térmica: cinco casos de estudio

El uso de simuladores se está extendiendo no sólo en la industria sino también en la universidad. La aparición de software que permiten y facilitan la creación de interfaces gráficas (GUI Graphical User Interface) y el uso de las propiedades termofísicas de las sustancias es una de las causas de dicho crecimiento. Por otro lado, la componente práctica y aplicada que se intenta dar a las asignaturas técnicas también ayuda a la preparación de competiciones centradas en el diseño experimental. En este artículo se analiza cinco experiencias docentes en el área de la Ingeniería Térmica que han tenido lugar en Tecnun. Tres de los casos de estudio son computacionales y dos experimentales. Las prácticas computacionales son basadas en simuladores implementados en EES (Engineering Equation Solver) que tratan tanto de diseño de componentes (Simulador para el diseño y optimización de Intercambiadores de Calor compactos) como del análisis de sistemas (Análisis de un ciclo frigorífico teniendo en cuenta tanto la Transferencia de Calor como la Mecánica de Fluidos o un Optimizador de Ciclos de Rankine con uso de catálogos para la selección de algunos componentes). Por otro lado las prácticas experimentales consistieron en competiciones en las que estudiantes tenían que optimizar un diseño. En uno de los casos los estudiantes tenían que maximizar la transferencia de calor mediante la adición de aletas a un vaso metálico con agua hirviendo en su interior u otro caso fue en el diseño de un intercambiador de calor para refrigerar la CPU de un ordenador de mesa trabajando al máximo de su carga. Una vez presentados los cinco casos de estudio se analizará las fortalezas y debilidades. En concreto se analiza la capacidad de integrar conceptos de varias disciplinas de la Ingeniería Térmica, la motivación que supone el hecho de hacer algo fuera de lo común, el desarrollo de habilidades profesionales, la posibilidad de abordar problemas más realistas que difícilmente sería posible hacerlo a través de la pizarra (estudios paramétricos y de optimización)

Hybrid Ni@ZnO@ZnS-Microalgae for circular economy: A smart route to the efficient integration of solar photocatalytic water decontamination and bioethanol production

Water remediation and development of carbon-neutral fuels are priority objectives of our evermore industrialized society. The answer to these challenges should be simple, sustainable, and inexpensive. Thus, biomimetic-inspired circular and holistic processes combing water remediation and biofuel production can be an appealing concept to deal with these global issues. A simple circular approach using helical Spirulina platensis microalgae as biotemplates to synthesize Ni@ZnO@ZnS photocatalysts for efficient solar water decontamination and bioethanol production during the recycling process is presented. Under solar irradiation, the Ni@ZnO@ZnS-Spirulina photocatalyst exhibited enhanced activity (mineralization efficiency > 99%) with minimal photocorrosion and excellent reusability. At the end of its effective lifetime for water remediation, the microalgae skeleton (mainly glycogen and glucose) of the photocatalyst was recycled to directly produce bioethanol by simultaneous saccharification and fermentation process. An outstanding ethanol yield of 0.4 L kg-1, which is similar to the highest yield obtained from oxygenic photosynthetic microorganisms, was obtained. Thus, the entire process allows effective solar photocatalytic water remediation and bioethanol production at room temperature using simple and easily scalable procedures that simultaneously fixes carbon dioxide, thereby constituting a zero-carbon-emission circular process

The Influence of the Trainer’s Social Behaviors on the Resilience, Anxiety, Stress, Depression and Eating Habits of Athletes

During their sporting lives, athletes must face multiple difficulties that can have consequences for their mental health and changes in their eating patterns. Therefore, the present study aims to analyze how social skills of the trainer influence the coping capacity, psychological well-being, and eating habits of the athlete, elements that are key to achieving success during competition. This study involved 1547 athletes and 127 trainer. In order to achieve the objective, the mean, standard deviation, bivariate correlations, reliability analysis and a structural equation model were analysed. The results showed that prosocial behaviours were positively related to resilience, while antisocial behaviours were negatively related. Resilience was negatively related to anxiety, stress and depression. Finally, anxiety, stress and depression were negatively related to healthy eating and positively related to unhealthy eating. These results highlight the importance of creating a positive social climate to develop coping strategies that promote mental health and healthy eating habits of athletes