Listar Articulos, Pre-prints (Centro de Física Fundamental (CFF)) por título

Mostrando ítems 1-20 de 102

    • A family of coordinate systems for reissner-nordstron geometry. 

      Patiño, Alberto; Rago, Héctor (SABER ULA, 2006-08-03)

    • A note about localized photons on the brane 

      Khoudeir, Adel (SABER ULA, 2005-01-06)
      A note about localized photons on the brane (Khoudeir, Adel) Abstract A first order formulation for the Maxwell field in five dimensions is dimentionally reduced using the Randall-Sundrum mechanism. We will see ...

    • La atractiva gravedad. 

      Rago, Héctor (SABER ULA, 2006-08-04)

    • Biomedical aplications in EELA. 

      Pérez Griffo, Javier; Isea, Raúl; Núñez, Luis; Mora, Henry Ricardo; Fernández, Manuel; Cardenas, Miguel; Hernández, Vicente; Mayo, Rafael; Blanquer, Ignacio (SABER ULA, 2007-03-09)
      Biomedical aplications in EELA. (Perez Griffo, Javier; Isea, Raul; Nuñez, Luis; Mora, Henry Ricardo; Fernández, Manuel; Cardenas, Miguel; Hernández, Vicente; Mayo, Rafael and Blanquer, Ignacio) Abstract The current ...

    • Broken symmetries in the early universe 

      Melfo, Alejandra; Senjanovic, Goran (SABER ULA, 2005-01-06)
      Broken symmetries in the early universe (Melfo, Alejandra; Senjanovic, Goran) Abstract We give a brief review of recent results on symmetry nonrestoration at high temperature. The year is 1010 B.C. All the ...

    • Bubble collisions and defect formation in a damping environment 

      Melfo, Alejandra; Ferrera, Antonio (SABER ULA, 2005-01-06)
      Bubble collisions and defect formation in a damping environment (Melfo, Alejandra; Ferrera, Antonio) Abstract Within the context of a first-order phase transition in the early Universe, we study the collision process ...

    • Close to the edge: hierarchy in a double braneworld 

      Guerrero, Rommel; Pantoja, Nelson; Melfo, Alejandra; Rodriguez, Omar (SABER ULA, 2007-03-19)
      Close to the edge: hierarchy in a double braneworld. (Guerrero, Rommel; Melfo, Alejandra; Pantoja, Nelson and Rodriguez, R. Omar) Abstract We show that the hierarchy between the Planck and the weak scales can follow ...

    • Clusters de PCs. 

      Núñez, Luis; Díaz, Gilberto; Hoeger, Herbert (SABER ULA, 2008-06-09)
      Clusters de PCs. (Núñez, Luis; Díaz, Gilberto; Hoeger, Herbert.) Resumen Los Clusters de PCs se hicieron populares con el proyecto Beowulf. La idea consiste en armar un máquina, con gran poder de computo, interconectando ...

    • Colapso gravitacional radiativo esféricamente simétrico en la aproximación poscuasiestática 

      Navarro, A. A.; Núñez, Luis; Rueda H., Jorge A.; Sanabria Gómez, J. D. (Revista Colombiana de Física, Vol. 40, No.1, Abril 2008, Colombia, 2008-04)
      Se describe la evolución del radio de un objeto esféricamente simétrico en fase de colapso gravitacional radiante en el marco de la relatividad general, usando el factor de flujo de radiación, el factor variable de Eddington ...

    • Comment on Ricci Collineations of static spherically symmetric spacetimes 

      Núñez, Luis; Percoco, Umberto; Contreras, Gerardo; Bertolotti, Ricardo; Carot, Jaume (SABER ULA, 2006-01-26)
      Comment on Ricci Collineations of static spherically symmetric spacetimes (Núñez, Luis; Contreras, Gerardo; Percoco, Umberto; Bertolotti, Ricardo; Carot, J.) Abstract We present a counter example to a theorem given ...

    • Conformal symmetries in null Einstein-Maxwell fields 

      Carot, Jaume; Hall, J. S. (SABER ULA, 2008-07-02)
      Conformal symmetries in null Einstein-Maxwell fields (Carot, Jaume; Hall, J. S.) Abstract It is shown that if a null Einstein-Maxwell spacetime admifs a proper conformal vector field it must either be a (generalized ...

    • Conformal symmetries in warped manifolds. 

      Apostolopoulos, Pantelis S.; Carot, Jaume (SABER ULA, 2008-07-02)
      Conformal symmetries in warped manifolds (P. S., Apostolopoulos; Carot, Jaume.) Abstract The existence of a Conformal Vector Field (CVF) is studied in the important class of warped manifolds of arbitrary dimension ...

    • Conformal symmetry inheritance in null fluid spacetimes 

      Carot, Jaume; Tupper, Brian O. J.; Hall, J. S.; Keane, A. J.; Coley, A. A. (SABER ULA, 2008-07-02)
      Conformal symmetry inheritance in null fluid spacetimes (Carot, Jaume; Keane, A. J.; Coley, A. A.; Hall, J. S.; Tupper, Brian O. J.) Abstract We define inheriting conformal Killing vectors for null fluid spacetimes ...

    • Conformally reducible 2 + 2 spacetimes 

      Carot, Jaume; Tupper, Brian O. J. (SABER ULA, 2008-07-02)
      Conformally reducible 2 + 2 spacetimes (Carot, Jaume; Tupper, Brian O. J.) Abstract Spacetimes which are conformal to 2 + 2 reducible spacetimes are considered. We classify them according to their conformal algebra, ...

    • Cosmos y cosmología 

      Rago, Héctor (SABER ULA, 2003-07-14)
      La traducción de este artículo fue publicada en el libro: Astrobiology: Origins from Big bang to Civilisation, Editado por Julián Chela-Flores, Guillermo A. Lemarchand y John Oró, Klwer Academis Press, 2000.

    • Covariant duality symmetric actions 

      Khoudeir, Adel; Pantoja, Nelson (SABER ULA, 2005-01-06)
      Covariant duality symmetric actions (Khoudeir, Adel; Pantoja, Nelson) Abstract A manifestly Lorentz and diffeomorphism invariant form for the abelian gauge field action with local duality symmetry of Schwarz and ...

    • Cracking of self-gravitating compact objects with local and non local equations of state. 

      Abreu, Henso; Hernández G., Héctor; Núñez, Luis (SABER ULA, 2006-12-28)
      Cracking of self-gravitating compact objects with local and non local equations of state. (Abreu, Henso; Hernández, Hector y Núñez, Luis) Abstract We discuss the effect that small fluctuations of density and local ...

    • Crucial test of relativity theory: open currents and magnetic model of light. 

      Spavieri, Gianfranco; Erazo, Jesús; Sánchez, Arturo; Ayazo, José; Rodriguez, M. (SABER ULA, 2007-04-13)
      Crucial test of relativity theory: open currents and magnetic model of light. Spavieri, Gianfranco; Erazo, J.; Sanchez, A.; Ayazo, José and Rodriguez, M. Abstract Fundamental tests of special theory of relativity (STR) ...

    • Curvature singularity of the distributional BTZ black hole geometry 

      Pantoja, Nelson; Rago, Héctor; Rodríguez, R.O. (SABER ULA, 2005-05-25)
      Curvature singularity of the distributional BTZ black hole geometry Pantoja, Nelson; Rago, Héctor; Rodríguez, R.O. Abstract For the non-rotating BTZ black hole, the distributional curvature ...

    • Diffuse gas condensation induced by variations of the ionizing flux 

      Parravano, Antonio; Pech, Catherine (SABER ULA, 2005-01-06)
      Diffuse gas condensation induced by variations of the ionizing flux (Parravano, Antonio; Pech, Catherine) Abstract The variation of an ionizing flux as a mechanism to stimulate the condensation of a diffuse gas is ...