AUB ScholarWorks

Browsing Department of Physics by Title

Browsing Department of Physics by Title

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  • Effects of magnetic perturbation on reconnection and heating in the solar corona 
    Hammoud, Mostafa M.; Antar, Ghassan Y.; Dayeh, Maher M. A.; Darwish, Marwan S.; El-Eid, Mounib F. (IOP Publishing Ltd, 2020)
    The solar corona exhibits unusually high temperatures (∼106 K) compared to the photosphere (∼5800 K). This coronal heating is one of the fundamental problems in solar physics that has yet to be resolved. Magnetic reconnection ...
  • Enhancing LSPR Sensitivity of Au Gratings through Graphene Coupling to Au Film 
    Maurer, Thomas; Nicolas, Rana; Lévêque, Gaëtan; Subramanian, Palaniappan; Proust, Julien; Béal, Jérémie; Schuermans, Silvère; Vilcot, Jean Pierre; Herro, Ziad G.; Kazan, Michel; Plain, Jérôme; Boukherroub, Rabah; Akjouj, Abdellatif; Djafari-Rouhani, Bahram; Adam, Pierre Michel; Szunerits, Sabine (Springer New York LLC, 2014)
    A particular interesting plasmonic system is that of metallic nanostructures interacting with metal films. As the localized surface plasmon resonance (LSPR) behavior of gold nanostructures (Au NPs) on the top of a gold ...
  • Entropy and the Spectral Action 
    Chamseddine, Ali H.; Connes, Alain; van Suijlekom, Walter Daniël (Springer, 2020)
    We compute the information theoretic von Neumann entropy of the state associated to the fermionic second quantization of a spectral triple. We show that this entropy is given by the spectral action of the spectral triple ...
  • EPR Studies for GdBa2Cu3 O 7−δ Added with Nanosized Ferrite ZnFe2 O 4 Before and After Irradiation by 3 MeV H+ Ions 
    Isber, Samih; Basma, Hadi; Noureldeen, S.; Barakat, Mai M.E.; Roumié, Mohamad; Awad, Ramadan (Springer New York LLC, 2017)
    (ZnFe2O4)xGdBa2Cu3O7−δ superconducting samples, 0 ≤ x ≤ 0.40 wt%, were synthesized using a conventional solid-state reaction technique. The prepared samples were investigated using electron paramagnetic resonance (EPR) ...
  • Evidence of alloy formation in CoNi nanoparticles synthesized by nanosecond-pulsed discharges in liquid nitrogen 
    Trad, Mahmoud; Nominé, A. V.; Noël, Cédric; Ghanbaja, Jaâfar; Tabbal, Malek; Belmonte, Thierry (Wiley-VCH Verlag, 2020)
    Producing alloy nanoparticles by discharge-assisted erosion of electrodes immersed in liquid nitrogen is possible in the cobalt–nickel system. Several electrode configurations are tested. When one nickel electrode faces ...
  • Exploring masses and CNO surface abundances of red giant stars 
    Halabi, Ghina M.; El-Eid, Mounib F. (Oxford University Press, 2015)
    A grid of evolutionary sequences of stars in the mass range 1.2-7M⊙, with solar-like initial composition is presented. We focus on this mass range in order to estimate the masses and calculate the CNO surface abundances ...
  • Femtosecond laser irradiation of titanium oxide thin films: accumulation effect under IR beam 
    Talbi, Abderazek; Semmar, Nadjib; Tabbal, Malek; Connor, G. O.; Coddet, Pierre L.; Thomann, Anne Lise; Stolz, Arnaud; Leborgne, C.; Millon, Eric (Springer, 2020)
    This paper discusses the mechanisms of laser-induced periodic surface structures (LIPSS) formation using a high repetition rate femtosecond laser beam irradiation of magnetron-sputtered titanium oxide thin films (TiO1.8) ...
  • Flow equations in arbitrary signature 
    Sabra, Wafic A. (Elsevier B.V., 2022)
    We discuss general bosonic configurations of four-dimensional N=2 supergravity coupled to vector multiplets in (t,s) space-time. The supergravity theories with Euclidean and neutral signature are described by the so-called ...
  • Force-extension curves for broken-rod macromolecules: Dramatic effects of different probing methods for two and three rods 
    Alexeev, A. V.; Maltseva, Diana V.; Ivanov, Viktor A.; Klushin, Leonid I.; Skvortsov, Aleksander M. (American Institute of Physics Inc., 2015)
    We study force-extension curves of a single semiflexible chain consisting of several rigid rods connected by flexible spacers. The atomic force microscopy and laser optical or magnetic tweezers apparatus stretching these ...
  • Formation of WO3 by remote plasma assisted oxidation of tungsten thin films 
    Mohtar, Abeer Al; Kassem, Wassim; Tabbal, Malek; Roumié, Mohamad (Elsevier B.V., 2016)
    In this work, we have investigated the formation of WO3 by remote plasma oxidation of pulsed laser deposited tungsten thin films. The effects of experimental parameters, such as pressure, temperature and duration on the ...
  • Generalized lock-in detection for interferometry: application to phase sensitive spectroscopy and near-field nanoscopy 
    Mohtar, Abeer Al; Vaillant, Julien; Sedaghat, Zohreh; Kazan, Michel; Joly, Lilian; Stoeffler, Clara; Cousin, Julien; Khoury, A.; Bruyant, Aurélien (Optical Society of America (OSA), 2014)
    A generalized lock-in detection method is proposed to extract amplitude and phase from optical interferometers when an arbitrary periodic phase or frequency modulation is used. The actual modulation function is used to ...
  • Geometry and the quantum: basics 
    Chamseddine, Ali H.; Connes, Alain; Mukhanov, Viatcheslav F. (Springer Verlag, 2014)
    Abstract: Motivated by the construction of spectral manifolds in noncommutative geometry, we introduce a higher degree Heisenberg commutation relation involving the Dirac operator and the Feynman slash of scalar fields. ...
  • Ghost free mimetic massive gravity 
    Chamseddine, Ali H.; Mukhanov, Viatcheslav F. (Springer Verlag, 2018)
    The mass of the graviton can be generated using a Brout-Englert-Higgs mechanism with four scalar fields. We show that when one of these fields is costrained as in mimetic gravity, the massive gravity obtained is ghost free ...
  • Grand unification in the spectral Pati-Salam model 
    Chamseddine, Ali H.; Connes, Alain; van Suijlekom, Walter Daniël (Springer Verlag, 2015)
    Abstract: We analyze the running at one-loop of the gauge couplings in the spectral Pati-Salam model that was derived in the framework of noncommutative geometry. There are a few different scenarios for the scalar particle ...
  • Graphene-based polymer composites with ultra-high in-plane thermal conductivity: A comparison study between optothermal Raman spectroscopy and laser flash method 
    Tarhini, Ali A.; Tehrani-Bagha, A. R.; Kazan, Michel (John Wiley and Sons Inc., 2020)
    We developed a simple solution mixing and molding process for the incorporation of graphene nano-flakes (GNFs) in polymer films. Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and poly(ethylene-co-methacrylic ...
  • Hamiltonian formulation of ghost free mimetic massive gravity 
    Malaeb, O.; Saghir, Chireen A. (Springer New York LLC, 2019)
    We present the hamiltonian formulation of the Ghost Free Mimetic Massive Gravity theory. The linearized theory is studied and the Hamitlonian equations of motion are analyzed. Poisson brackets are computed and closure is ...
  • Hamiltonian formulation of mimetic gravity 
    Malaeb, O. (American Physical Society, 2015)
    The Hamiltonian formulation of mimetic gravity is formulated. Although there are two more equations than those of general relativity, these are proved to be the constraint equation and the conservation of the energy-momentum ...
  • Harmonicity and anharmonicity of phonon and surface phonon-polariton in high symmetry directions in wurtzite AlN 
    Karakachian, Hrag; Kazan, Michel (American Institute of Physics Inc., 2017)
    We report on the potential of self-nucleated AlN single crystals as tunable near-field infrared sources. A self-nucleated AlN crystal was grown with appropriate care to ensure minimal contact with crucible walls or other ...
  • Hypersymplectic geometry and supersymmetric solutions in (t,s) 5D supergravity 
    Sabra, Wafic A. (American Physical Society, 2021)
    Relying on the method of spinorial geometry, purely bosonic supersymmetric solutions in N=2, five-dimensional supergravity theories coupled to vector multiplets in all space-Time signatures are found. Explicit examples of ...
  • Impact of magnetic fields on Population III star formation 
    Saad, Cynthia R.; Bromm, Volker; El-Eid, Mounib F. (Oxford University Press, 2022)
    The theory of the formation of the first stars in the Universe, the so-called Population III (Pop III), has until now largely neglected the impact of magnetic fields. Complementing a series of recent studies of the ...

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