99 research outputs found
Parametrization of embedded-atom method potential for liquid lithium and lead-lithium eutectic alloy
No full textLiquid lead-lithium eutectic remains as a promising candidate for various breeding-blanket designs in future nuclear-fusion technologies. The lack of a generalized theory of interatomic forces in the liquid state is reflected on the wide variety of proposed functional forms to describe interatomic interactions even in simple liquids. Computer simulations facilitate the study of liquid metal properties, due to mathematical and experimental challenges. A classical-MD EAM potential is parametrized using mechanical and non-mechanical (melting-point) properties to minimize the arbitrariness of functional forms, where the employed pair potential stems from the liquid-state theory to avoid the issue of the uniqueness of the potential. Enhanced performance is obtained for liquid density, energy, structure, diffusivity and shear viscosity of Li, and their temperature-dependencies. In a similar manner, reference experimental and ab initio MD data are used to parametrize a functional to describe Pb-Li pairwise interactions in liquid Pb-Li alloy, which is used with the derived EAM of liquid Li and a reference EAM of liquid Pb to investigate properties of liquid Pb-Li alloy. Enhanced transferability characteristics are obtained for low-in-lithium liquid Pb-Li melts, where Coulombic interactions are negligible. In specific, the exhibited behaviour of Li in liquid lead-lithium eutectic is consistent with findings from ab initio MD methods, and drastically different from predictions of previous C-MD studies which suggested a substantial segregation of Li atoms instead of dispersion. It is concluded that the functional form of the pair potential and its uniqueness influence both the pure liquid-metal properties and the validity of the potential transferability in multi-component systems, where a theoretical functional results in enhanced performance in pure and alloyed liquid systems.We thank Dr. Jordi Marti for the discussion about the NPA potential. The first author is a holder of FI AGAUR doctoral fellowship, provided by Generalitat de Catalunya and European Social Plus Fund. This work is partially funded by the EUROfusion project (Grant Agreement No. 101052200) under the Horizon Europe programme.With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000917-S).Peer reviewe
Intervenció de Lluis Batet a l'acte d'inauguració del curs acadèmic 18-19 del Màster universitari en Enginyeria Nuclear de la ETSEIB
No full textPla mitjà llarg de Lluís Batet durant la seva intervenció a l'acte d'inauguració del curs acadèmic 18-19 del Màster universitari en Enginyeria Nuclear i del Màster Europeu en Enginyeria Nuclear, celebrat el 4 d'octubre de 2018 a l'Aula Capella de la ETSEIB. A la imatge, d'esquerra a dreta: Gonzalo Carbó (Endesa), Javier Dies (membre del Consell de Seguretat Nuclear-CSN de l'estat espanyol), Carme Pretel Sánchez (Delegada en representació de direcció de la ETSEIB) i Lluís Batet Miracle (Director del Máster MNE-EMINE
Intervenció de Lluis Batet a l'acte d'inauguració del curs acadèmic 18-19 del Màster universitari en Enginyeria Nuclear de la ETSEIB
No full textPla mitjà llarg de Lluís Batet durant la seva intervenció a l'acte d'inauguració del curs acadèmic 18-19 del Màster universitari en Enginyeria Nuclear i del Màster Europeu en Enginyeria Nuclear, celebrat el 4 d'octubre de 2018 a l'Aula Capella de la ETSEIB. A la imatge, d'esquerra a dreta: Gonzalo Carbó (Endesa), Javier Dies (membre del Consell de Seguretat Nuclear-CSN de l'estat espanyol), Carme Pretel Sánchez (Delegada en representació de direcció de la ETSEIB) i Lluís Batet Miracle (Director del Máster MNE-EMINE
Intervenció de Lluis Batet a l'acte d'inauguració del curs acadèmic 18-19 del Màster universitari en Enginyeria Nuclear de la ETSEIB
No full textPla mitjà llarg de Lluís Batet durant la seva intervenció a l'acte d'inauguració del curs acadèmic 18-19 del Màster universitari en Enginyeria Nuclear i del Màster Europeu en Enginyeria Nuclear, celebrat el 4 d'octubre de 2018 a l'Aula Capella de la ETSEIB. A la imatge, d'esquerra a dreta: Gonzalo Carbó (Endesa), Javier Dies (membre del Consell de Seguretat Nuclear-CSN de l'estat espanyol), Carme Pretel Sánchez (Delegada en representació de direcció de la ETSEIB) i Lluís Batet Miracle (Director del Máster MNE-EMINE
Intervenció de Lluis Batet a l'acte d'inauguració del curs acadèmic 18-19 del Màster universitari en Enginyeria Nuclear de la ETSEIB
No full textPla mitjà llarg de Lluís Batet durant la seva intervenció a l'acte d'inauguració del curs acadèmic 18-19 del Màster universitari en Enginyeria Nuclear i del Màster Europeu en Enginyeria Nuclear, celebrat el 4 d'octubre de 2018 a l'Aula Capella de la ETSEIB. A la imatge, d'esquerra a dreta: Gonzalo Carbó (Endesa), Javier Dies (membre del Consell de Seguretat Nuclear-CSN de l'estat espanyol), Carme Pretel Sánchez (Delegada en representació de direcció de la ETSEIB) i Lluís Batet Miracle (Director del Máster MNE-EMINE
Tándem : didáctica de la educación física
No full textResumen basado en el de la publicaciónMonográfico con el título Recrea tu ocioSe muestra una situación de aprendizaje desarrollada con alumnado de primer curso de educación secundaria obligatoria (ESO) utilizando la gamificación como estrategia metodológica. La situación se caracteriza por el deseo de generar un entorno de aprendizaje motivador y cercano al alumnado que permita promover conductas y hábitos relacionados con el trabajo en equipo y la salud, a fin de contribuir al desarrollo de las competencias esenciales para la vida.Biblioteca de Educación del Ministerio de Educación, Cultura y Deporte; Calle San Agustín, 5 - 3 Planta; 28014 Madrid; Tel. +34917748000; [email protected]
Tándem : didáctica de la educación física
No full textResumen basado en el de la publicaciónMonográfico con el título Los modelos pedagógicos: un desafío para la educación físicaSe muestra un proyecto colaborativo desarrollado con alumnado de cuarto curso de educación secundaria obligatoria que ha sido vehiculado de forma interdisciplinar entre las materias de educación física, lengua catalana, lengua castellana y religión del mismo centro educativo. La experiencia se caracteriza por el deseo de traspasar las fronteras del aula y promover un aprendizaje que sea significativo, relevante y real, a través de una educación que contribuya al desarrollo de competencias esenciales para la vida.Biblioteca de Educación del Ministerio de Educación, Cultura y Deporte; Calle San Agustín, 5 - 3 Planta; 28014 Madrid; Tel. +34917748000; [email protected]
A probabilistic author-centered model for Twitter discussions
No full textIn a recent work some of the authors have developed an argumentative approach for discovering relevant opinions in Twitter discussions with probabilistic valued relationships. Given a Twitter discussion, the system builds an argument graph where each node denotes a tweet and each edge denotes a criticism relationship between a pair of tweets of the discussion. Relationships between tweets are associated with a probability value, indicating the uncertainty that the relationships hold. In this work we introduce and investigate a natural extension of the representation model, referred as probabilistic author-centered model, in which tweets within a discussion are grouped by authors, in such a way that tweets of a same author describe his/her opinion in the discussion and are rep- resented with a single node in the graph, and criticism relationships denote controversies between opinions of Twitter users in the discussion. In this new model, the interactions between authors can give rise to circular criticism relationships, and the probability of one opinion criticizing another has to be evaluated from the probabilities of criticism among the tweets that compose both opinions.This work was partially funded by the Spanish MICINN Projects TIN2015-71799-C2-1-P and TIN2015-71799-C2-2-PPeer Reviewe
El pensamiento de santo Tomás de Aquino en la Encíclica Fides et ratio
No full textThe author presents the portrait of St. Thomas Aquinas following a selection of texts of the Encyclical. The harmony between faith and reason, the right autonomy of the human nature, the metaphysics of act of being (including the personal being) seem to be the ground of the recomendations of the Popes, particularly from Leo XIII to John Paul II, to study the thought of Aquinas, that was very present in the Council Vatican II
Provenance-based trust for grid computing: Position Paper
No full textCurrent evolutions of Internet technology such as Web Services, ebXML, peer-to-peer and Grid computing all point to the development of large-scale open networks of diverse computing systems interacting with one another to perform tasks. Grid systems (and Web Services) are exemplary in this respect and are perhaps some of the first large-scale open computing systems to see widespread use - making them an important testing ground for problems in trust management which are likely to arise. From this perspective, today's grid architectures suffer from limitations, such as lack of a mechanism to trace results and lack of infrastructure to build up trust networks. These are important concerns in open grids, in which "community resources" are owned and managed by multiple stakeholders, and are dynamically organised in virtual organisations. Provenance enables users to trace how a particular result has been arrived at by identifying the individual services and the aggregation of services that produced such a particular output. Against this background, we present a research agenda to design, conceive and implement an industrial-strength open provenance architecture for grid systems. We motivate its use with three complex grid applications, namely aerospace engineering, organ transplant management and bioinformatics. Industrial-strength provenance support includes a scalable and secure architecture, an open proposal for standardising the protocols and data structures, a set of tools for configuring and using the provenance architecture, an open source reference implementation, and a deployment and validation in industrial context. The provision of such facilities will enrich grid capabilities by including new functionalities required for solving complex problems such as provenance data to provide complete audit trails of process execution and third-party analysis and auditing. As a result, we anticipate that a larger uptake of grid technology is likely to occur, since unprecedented possibilities will be offered to users and will give them a competitive edge
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