622 research outputs found

    Microscopic study of neutron-rich Dysprosium isotopes

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    Microscopic studies in heavy nuclei are very scarce due to large valence spaces involved. This computational problem can be avoided by means of the use of symmetry based models. Ground-state, gamma and beta-bands, and their B(E2) transition strengths in 160-168Dy isotopes, are studied in the framework of the pseudo-SU(3) model which includes the preserving symmetry Q.Q term and the symmetry-breaking Nilsson and pairing terms, systematically parametrized. Additionally, three rotor-like terms are considered whose free parameters, fixed for all members of the chain are used to fine tune the moment of inertia of rotational bands and the band-head of gamma and beta-bands. The model succesfully describes in a systematic way rotational features in these nuclei and allows to extrapolate toward the midshell nucleus 170Dy. The results presented show that it is possible to study full chain of isotopes or isotones in the region with the present model

    Duino-Based Learning (DBL) in control engineering courses

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    © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other worksThis document presents a project to develop freely redistributable materials to conduct educational lab projects with MATLAB, Simulink, Arduino and low-cost plants. This work materials introduce the fundamentals of Control Engineering through exercises and videos. Along with all this, the most important steps and issues appeared in the project are explained, so anyone interested on doing a project can have a starting point instead of starting a project from scratch, which most of times this results hard to implementPeer ReviewedPostprint (author's final draft

    Epilog: Cajal’s unique and legitimated school

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    Santiago Ramón y Cajal is recognized as the founder of modern neuroscience, his discoveries representing the fundamental pillars of our current understanding of the nervous system. As Cajal’s career spanned a critical period in Spanish history, he witnessed strong social demands for progress in culture, education, and science. Indeed, the life of Santiago Ramón y Cajal can be considered to reflect the gradual development of Spanish science from the last third of the 19th century. Cajal promoted a national movement that had important consequences for Spanish science, mainly triggered by the creation of the “Junta para Ampliación de Estudios e Investigaciones Científicas,” an instrument he established to enrich scientific research and that was later to bear such abundant fruit. The school generated by Cajal profited from this development, through which all Cajal’s disciples received fellowships to train in laboratories across Europe. Unfortunately, the Spanish Civil War disrupted this revitalization of Spanish science and provoked the diaspora of many Spanish scientists. However, a political impulse, mostly following this spirit, was resumed in Spain during the eighties that successfully led to a renaissance in Spanish science.The work in the authors’ laboratories is supported by grants (to Juan Lerma) from the Spanish MICINN (BFU2011-24084), CONSOLIDER (CSD2007-00023), Prometeo/2011/086, and BFU2010-21377 (to Juan A. de Carlos).Peer reviewedPeer Reviewe

    A discussion concerning active infrared thermography in the evaluation of buildings air infiltration

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    [EN] The EU is strongly committed to energy saving in buildings. Air leaks through the building envelope represent a significant percentage of buildings energy consumption. Locating and minimizing air leaks is thus necessary to optimize energy efficiency. This work presents the results of an experimental campaign that aimed to promote a discussion concerning the opportunities and constraints of using active IRT to detect air leakage points. The potential of active IRT was evaluated both in a qualitative approach, by comparing the thermograms with the ones obtained with passive IRT, and in a quantitative one, by testing methods of numerically interpret the thermograms. The results allowed concluding that active IRT increases the thermal contrast and the affected area, proving that active IRT combined with pressure differences is an effective methodology for detecting air infiltrations. In the quantitative approach different numerical methods can be used. Their selection depends on the aims of the study, as they can highlight different perspectives of the phenomenon. (C) 2018 Elsevier B.V. All rights reserved.This work was financially supported by: Project POCI-01-0145-FEDER-007457 - CONSTRUCT - Institute of R&D In Structures and Construction funded by FEDER funds through COMPETE2020 - Programa Operacional Competitividade e Internacionalizacao (POCI) - and by national funds through FCT - Fundacao para a Ciencia e a Tecnologia.Lerma Elvira, C.; Barreira, E.; Almeida, R. (2018). A discussion concerning active infrared thermography in the evaluation of buildings air infiltration. Energy and Buildings. 168:56-66. https://doi.org/10.1016/j.enbuild.2018.02.050S566616

    Dynamics of Coherent States in Regular and Chaotic Regimes of the Non-integrable Dicke Model

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    The quantum dynamics of initial coherent states is studied in the Dicke model and correlated with the dynamics, regular or chaotic, of their classical limit. Analytical expressions for the survival probability, i.e. the probability of finding the system in its initial state at time tt, are provided in the regular regions of the model. The results for regular regimes are compared with those of the chaotic ones. It is found that initial coherent states in regular regions have a much longer equilibration time than those located in chaotic regions. The properties of the distributions for the initial coherent states in the Hamiltonian eigenbasis are also studied. It is found that for regular states the components with no negligible contribution are organized in sequences of energy levels distributed according to Gaussian functions. In the case of chaotic coherent states, the energy components do not have a simple structure and the number of participating energy levels is larger than in the regular cases.Comment: Contribution to the proceedings of the Escuela Latinoamericana de F\'isica (ELAF) Marcos Moshinsky 2017. (9 pages, 4 figures

    Arquitectura de Cerca: Catálogo de Detalles Fotográficos

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    En Arquitectura, tan importante es la concepción global del proyecto como saber cómo se puede construir. Es en estos términos en los que puede resultar interesante y práctica esta publicación sobre Arquitectura De Cerca. Se muestran más de 1000 fotografías que ilustran con gran detalle una extensa variedad de temas. Se trata de explicar, de mostrar, de que se entienda cómo se pueden construir los diferentes elementos arquitectónicos (una fachada, un hueco para una ventana, una barandilla, etc.). Implícitamente el lector debe tratar de reflexionar acerca de cuál es el proceso constructivo que debe llevarse a cabo en la ejecución. Este texto nace como resultado del archivo fotográfico del autor que periódicamente se va publicando en la web http://arquitecturadc.es desde el 7 de abril de 2011 y que sumando todas las redes sociales cuenta ya con más de 9500 seguidores.Lerma Elvira, C. (2016). Arquitectura de Cerca: Catálogo de Detalles Fotográficos. http://hdl.handle.net/10251/9296

    La nueva historia y el periodismo narrativo como fuente de conocimiento en los procesos de investigación.

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    La investigación científica está desarrollando nuevos enfoques y metodologías docentes para acercar el conocimiento a los alumnos. En este contexto, la Nueva Historia y el periodismo narrativo supone un cambio innovador en el campo científico. Este articulo explica los avances en innovación docente, así como los nuevos procesos de actualización de textos que sirven para reconstruir la dimensión histórica.Scientific research is developing new approaches and teaching methodologies to bring knowledge to the students. In this context, the New History and narrative journalism implies an innovative change in the scientific field. This article explains the advances in teaching innovation, as well as the new processes of updating texts that serve to reconstruct the historical dimension
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