4,140 research outputs found

    Homotopy groups of generic leaves of logarithmic foliations

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    We study the homotopy groups of generic leaves of logarithmic foliations on complex projective manifolds. We exhibit a relation between the homotopy groups of a generic leaf and of the complement of the polar divisor of the logarithmic foliation.Comment: Keywords: Foliations, Logarithmic, Topology of Leave

    Spectroscopy of quadrupole and octupole states in rare-earth nuclei from a Gogny force

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    Collective quadrupole and octupole states are described in a series of Sm and Gd isotopes within the framework of the interacting boson model (IBM), whose Hamiltonian parameters are deduced from mean field calculations with the Gogny energy density functional. The link between both frameworks is the (β2β3\beta_2\beta_3) potential energy surface computed within the Hartree-Fock-Bogoliubov framework in the case of the Gogny force. The diagonalization of the IBM Hamiltonian provides excitation energies and transition strengths of an assorted set of states including both positive and negative parity states. The resultant spectroscopic properties are compared with the available experimental data and also with the results of the configuration mixing calculations with the Gogny force within the generator coordinate method (GCM). The structure of excited 0+0^{+} states and its connection with double octupole phonons is also addressed. The model is shown to describe the empirical trend of the low-energy quadrupole and octupole collective structure fairly well, and turns out to be consistent with GCM results obtained with the Gogny force.Comment: 17 pages, 12 figures, 4 table

    Structural evolution in germanium and selenium nuclei within the mapped interacting boson model based on the Gogny energy density functional

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    The shape transitions and shape coexistence in the Ge and Se isotopes are studied within the interacting boson model (IBM) with the microscopic input from the self-consistent mean-field calculation based on the Gogny-D1M energy density functional. The mean-field energy surface as a function of the quadrupole shape variables β\beta and γ\gamma, obtained from the constrained Hartree-Fock-Bogoliubov method, is mapped onto the expectation value of the IBM Hamiltonian with configuration mixing in the boson condensate state. The resultant Hamiltonian is used to compute excitation energies and electromagnetic properties of the selected nuclei 6694^{66-94}Ge and 6896^{68-96}Se. Our calculation suggests that many nuclei exhibit γ\gamma softness. Coexistence between prolate and oblate, as well as between spherical and γ\gamma-soft, shapes is also observed. The method provides a reasonable description of the observed systematics of the excitation energy of the low-lying energy levels and transition strengths for nuclei below the neutron shell closure N=50N=50, and provides predictions on the spectroscopy of neutron-rich Ge and Se isotopes with 52N6252\leq N\leq 62, where data are scarce or not available.Comment: 16 pages, 20 figure

    Consecuencias legales derivadas de un accidente laboral

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    Traballo fin de grao (UDC.DER). Dereito. Curso 2014/201

    Memoria de la Comisión Provincial de Monumentos Históricos y Artísticos de Ávila leída en la solemne inauguración del Museo Provincial el día 21 de octubre de 1911

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    Ejemplar manuscrito del autorCopia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2009-201

    Project Incandescence: Design and development of a geolocated experience

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    Treball Final de Grau en Disseny i Desenvolupament de Videojocs. Codi: VJ1241. Curs acadèmic: 2015-2016As years go by, more and more everyday objects are getting interconnected and aware of their environment. This technological fabric being woven across our lives opens up opportunities never seen before. The communication and personal nature of smartphones makes them the ideal flagship in charge of clearing the path and heading towards the Internet of Things era. Their embedded sensors together with their broad adoption makes them the perfect devices for experimenting on novel ways of creating fresh interactive experiences. In this paper, Project Incandescence is proposed; an application which aims to experiment with storytelling by the exploitation of up-to-date technologies present in smartphones. The intended target audience are students of the last years of high school or college students. In other words, people from 16 to 24 years old which are willing to try new things. Project Incandescence is a global video game project but efforts will be mainly focused on programming an app which integrates and makes use of the information provided by recent technologies. Specifically, geolocation, augmented reality and haptic feedback will capture our attention. Another key part of the project is game design. However, it will be tackled with lesser dedication. The artistic aspect of the experience will not be neglected either, but it will be the least important aspect of the three main ones. The development will target the Android platform which is the most extended one among smartphones. This software stack has also postulated as key one in the future since it does not target a specific device, and currently supports from watches to cars
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