Now showing items 1-14 of 14

    • An approach to evaporating stars and black holes 

      Fayos Vallés, Francisco; Torres Herrera, Ramon (2011-09-01)
      Article
      Open Access
      Many models in which the object under study loses all its mass have appeared in the literature. No doubt, the most eminent examples are the models for evaporating black holes and for evaporating stars. Here we describe ...
    • El proyecto arquitectónico a la luz del “paradigma indicial” 

      Fayos Vallés, Francisco (Centre de Política del Sòl i Valoracions - Universitat Politècnica de Catalunya, 2017-06)
      Article
      Open Access
      Este trabajo pretende mostrar un modelo sobre cómo se generan y organizan los conocimientos propios de disciplinas que, aun usando la ciencia y la tecnología como herramientas, se sitúan, por su esencia, más allá de éstas. ...
    • Evaluación de la actividad de investigación en arquitectura y urbanismo: revistas de investigación 

      Fayos Vallés, Francisco; Serrat Brustenga, Marta; Amat Bozzo, Lluïsa (2013-07-22)
      Lecture
      Open Access
    • Física aplicada al càlcul estructural arquitectònic 

      Fayos Vallés, Francisco; Torres Herrera, Ramon (Universitat Politècnica de Catalunya. Iniciativa Digital Politècnica, 2017)
      Book
      Open Access
      En aquest llibre s’ofereix una introducció moderna al càlcul estructural. Es pretén que les noves generacions d’arquitectes coneguin des dels primers cursos, d’una banda, els fonaments de la ciència que són aplicables a ...
    • La rellevància de les matemàtiques i l'estadística en el món actual : taula rodona 

      Delgado Rigal, Antonio; Escudero, L. F.; Fayos Vallés, Francisco; Talaya López, Julià (2003-11-01)
      Audiovisual
      Open Access
      Dins el marc de la 8a Setmana de la Ciència es va celebrar aquesta taula rodona on es debat sobre la presència i la necessitat dels mètodes que proporcionen la matemàtica, l'estadística i la investigació operativa en la ...
    • Local behaviour of evaporating stars and black holes around the total evaporation event 

      Fayos Vallés, Francisco; Torres Herrera, Ramon (2010-06-21)
      Article
      Open Access
    • Maxwell equations in the Debye potential formalism 

      Fayos Vallés, Francisco; Llanta Salleras, Estanislao; Llosa, J (1985-02-01)
      Article
      Open Access
      The authors propose a method for computing the electromagnetic test-field created by a given distribution of charges and currents using the Debye potential formalism in curved space-times. This framework has been applied ...
    • On how energy conservation might prevent black hole explosions and violations of the third law 

      Torres Herrera, Ramon; Fayos Vallés, Francisco (2013-11-12)
      Article
      Open Access
      We claim that imposing energy conservation to the emission of Hawking radiation and to the modeling of black hole (BH) evaporation might prevent BH explosions as well as violations of the third law of BH thermodynamics. ...
    • On regular rotating black holes 

      Torres Herrera, Ramon; Fayos Vallés, Francisco (2017-01-01)
      Article
      Open Access
      Different proposals for regular rotating black hole spacetimes have appeared recently in the literature. However, a rigorous analysis and proof of the regularity of this kind of spacetimes is still lacking. In this note ...
    • On the causal characterization of singularities in spherically symmetric spacetimes 

      Fayos Vallés, Francisco; Torres Herrera, Ramon (2011-10-14)
      Article
      Restricted access - publisher's policy
    • On the invariant causal characterization of singularities in spherically symmetric spacetimes 

      Fayos Vallés, Francisco; Torres Herrera, Ramon (2012-04-18)
      Article
      Open Access
      The causal character of singularities is often studied in relation to the existence of naked singularities and the subsequent possible violation of the cosmic censorship conjecture. Generally, one constructs a model in the ...
    • On the quantum corrected gravitational collapse 

      Torres Herrera, Ramon; Fayos Vallés, Francisco (Elsevier, 2015-06-09)
      Article
      Open Access
      Based on a previously found general class of quantum improved exact solutions composed of non-interacting (dust) particles, we model the gravitational collapse of stars. As the modeled star collapses a closed apparent ...
    • Singularity free gravitational collapse in an effective dynamical quantum spacetime 

      Torres Herrera, Ramon; Fayos Vallés, Francisco (Elsevier, 2014-05-05)
      Article
      Open Access
      We model the gravitational collapse of heavy massive shells including its main quantum corrections. Among these corrections, quantum improvements coming from Quantum Einstein Gravity are taken into account, which provides ...
    • The mechanism why colliders could create quasi-stable black holes 

      Torres Herrera, Ramon; Fayos Vallés, Francisco; Lorente Espín, Oscar (2013-09-09)
      Article
      Open Access
      It has been postulated that black holes could be created in particle collisions within the range of the available energies for nowadays colliders (LHC). In this paper we analyze the evaporation of a type of black holes ...