AUB ScholarWorks

Browsing Department of Physics by Title

Browsing Department of Physics by Title

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  • Nano-squares and regular LIPSS on YSZ coating by picosecond UV laser beam: Thin film mediated and direct texturing 
    Karim, Wael; Petit, Agnès; Millon, Eric; Vulliet, Julien; Tabbal, Malek; Thomann, Anne Lise; Semmar, Nadjib (Elsevier B.V., 2023)
    The laser texturing of high bandgap ceramic materials, such as Yttrium Stabilized Zirconia (YSZ), is very challenging due to their structural complexity, their mechanical fragility as well as the risk of a chemical ...
  • Near-field and far-field sensitivities of LSPR sensors 
    Kamińska, Izabela I.; Maurer, Thomas; Nicolas, Rana; Renault, Mikael; Lerond, Thomas; Salas-Montiel, Rafael; Herro, Ziad G.; Kazan, Michel; Niedziółka-Jönsson, Joanna; Plain, Jérôme; Adam, Pierre Michel; Boukherroub, Rabah; Szunerits, Sabine (American Chemical Society, 2015)
    The present study compares the near-field and far-field sensitivities of localized surface plasmon resonance (LSPR) sensors. To put into evidence the difference between far-field and near-field sensors, optical extinction ...
  • Neutral signature gauged supergravity solutions 
    Gutowski, Jan B.; Sabra, Wafic A. (Springer Science and Business Media Deutschland GmbH, 2021)
    We classify all supersymmetric solutions of minimal D = 4 gauged supergravity with (2) signature and a positive cosmological constant which admit exactly one Killing spinor. This classification produces a geometric structure ...
  • New Antenna Designs to Boost the Plasma Density in Helicon Sources 
    Ali, Rayan Al Sayed; Antar, Ghassan Y.; Costantine, Joseph (Institute of Electrical and Electronics Engineers Inc., 2022)
    Plasma can be generated using radio frequency (RF) electromagnetic waves for a large variety of applications, such as energy and propulsion generation. Often, the desire is to achieve higher densities for given input power ...
  • Non-Flat Universes and Black Holes in Asymptotically Free Mimetic Gravity 
    Chamseddine, Ali H.; Mukhanov, Viatcheslav F.; Russ, Tobias B. (Wiley-VCH Verlag, 2020)
    The recently proposed theory of “Asymptotically Free Mimetic Gravity” is extended to the general non-homogeneous, spatially non-flat case. We present a modified theory of gravity which is free of higher derivatives of the ...
  • Noncommutative geometry and structure of space–time 
    Chamseddine, Ali H. (Springer, 2020)
    I give a summary review of the research program using noncommutative geometry as a framework to determine the structure of space–time. Classification of finite noncommutative spaces under few assumptions reveals why nature ...
  • Noncommutativity and physics: a non-technical review 
    Chamseddine, Ali H.; Connes, Alain; van Suijlekom, Walter Daniël (Springer Science and Business Media Deutschland GmbH, 2023)
    We give an overview of the applications of noncommutative geometry to physics. Our focus is entirely on the conceptual ideas, rather than on the underlying technicalities. Starting historically from the Heisenberg relations, ...
  • Nonsingular black hole 
    Chamseddine, Ali H.; Mukhanov, Viatcheslav F. (Springer New York LLC, 2017)
    We consider the Schwarzschild black hole and show how, in a theory with limiting curvature, the physical singularity “inside it” is removed. The resulting spacetime is geodesically complete. The internal structure of this ...
  • Nucleosynthesis in relation to cosmology 
    El-Eid, Mounib F. (Institute of Physics Publishing, 2018)
    While the primordial (or Big Bang) nucleosynthesis delivers important clues about the conditions in the high red-shift universe (termed far-field cosmology), the nucleosynthesis of the heavy elements beyond iron by the ...
  • On the dynamics of a spinning top under the influence of rotation: Resonant relative equilibrium states 
    Sheheitli, Hiba; Touma, Jihad R. (Elsevier B.V., 2018)
    We investigate the dynamics of a spinning top driven by a turntable that rotates with a given angular speed Ω. The pivot point of the top is at a fixed distance from the center of the turntable. We show that such a setup ...
  • On the interaction between the ion cyclotron resonance heating and scrape-off layer turbulence via coherent waves 
    Antar, Ghassan Y.; Goniche, Marc; Ekedahl, Annika C.; Colas, Laurent (Institute of Physics Publishing, 2014)
    It was reported on the ASDEX-Upgrade tokamak and recently confirmed on the Tore Supra tokamak (Antar 2010 et al Phys. Rev. Lett. 105 165001, Antar 2012 Nucl. Fusion 52 103005) that ion cyclotron resonance heating (ICRH) ...
  • On the interplay between phonon-boundary scattering and phonon-point-defect scattering in SiGe thin films 
    Iskandar, A.; Abou-Khalil, Alain; Kazan, Michel; Kassem, Wassim; Volz, Sébastian Gunter (American Institute of Physics Inc., 2015)
    This paper provides theoretical understanding of the interplay between the scattering of phonons by the boundaries and point-defects in SiGe thin films. It also provides a tool for the design of SiGe-based high-efficiency ...
  • On unification of gravity and gauge interactions 
    Chamseddine, Ali H.; Mukhanov, Viatcheslav F. (Springer Verlag, 2016)
    Abstract: Considering a higher dimensional Lorentz group as the symmetry of the tangent space, we unify gravity and gauge interactions in a natural way. The spin connection of the gauged Lorentz group is then responsible ...
  • Order-Disorder Phase Transition in Black-Hole Star Clusters 
    Touma, Jihad R.; Tremaine, Scott D.; Kazandjian, Mher V. (American Physical Society, 2019)
    The centers of most galaxies contain massive black holes surrounded by dense star clusters. The structure of these clusters determines the rate and properties of observable transient events, such as flares from tidally ...
  • Phantom space-times in fake supergravity 
    Bu Taam, Maryam; Sabra, Wafic A. (Elsevier, 2015)
    We discuss phantom metrics admitting Killing spinors in fake N= 2, D= 4 supergravity coupled to vector multiplets. The Abelian U(1) gauge fields in the fake theory have kinetic terms with the wrong sign. We solve the Killing ...
  • Phase transitions in single macromolecules: Loop-stretch transition versus loop adsorption transition in end-grafted polymer chains 
    Zhang, Shuangshuang; Qi, Shuanhu; Klushin, Leonid I.; Skvortsov, Aleksander M.; Yan, Dadong; Schmid, Friederike (American Institute of Physics Inc., 2018)
    We use Brownian dynamics simulations and analytical theory to compare two prominent types of single molecule transitions. One is the adsorption transition of a loop (a chain with two ends bound to an attractive substrate) ...
  • Phonon heat transport in superlattices: Case of Si/SiGe and SiGe/SiGe superlattices 
    Hijazi, M.; Kazan, Michel (American Institute of Physics Inc., 2016)
    We present a predictive Boltzmann model for the cross-plane thermal conductivity in superlattices. The developed model considers particle-like phonons exhibiting wave characteristics at the interfaces and makes the assumption ...
  • Picosecond laser beam nanostructuring of GDC thin films: exchange surface enhancement by LIPSS 
    Karim, Wael; Petit, Agnès; Rabat, Hervè; Tabbal, Malek; Thomann, Anne Lise; Semmar, Nadjib (Springer Science and Business Media Deutschland GmbH, 2022)
    In ceramic electrochemical cells, gadolinium-doped ceria (GDC) thin film is deposited between the electrolyte (yttria-stabilized zirconia, YSZ) and the upper electrode to improve the aging resistance. Increasing the interface ...
  • PIXE contribution for a database of Phoenician pottery in Lebanon 
    Roumié, Mohamad; Oggiano, Ida; Reslan, A.; Srour, Ali; El-Morr, Ziad; Castiglione, Marianna; Tabbal, Malek; Korek, Mahmoud; Nsouli, Bilal (Elsevier B.V., 2019)
    The study the ancient Phoenician cult place of Kharayeb, in the rural hinterland of Tyre, southern of Lebanon, dated to the Iron Age and Hellenistic periods is particularly helpful in evaluating the complexity and variability ...
  • Plasmonic mode interferences and Fano resonances in Metal-Insulator- Metal nanostructured interface 
    Nicolas, Rana; Lévêque, Gaëtan; Marae-Djouda, Joseph; Montay, Guillaume; Madi, Yazid; Plain, Jérôme; Herro, Ziad G.; Kazan, Michel; Adam, Pierre Michel; Maurer, Thomas (Nature Publishing Group, 2015)
    Metal-insulator-metal systems exhibit a rich underlying physics leading to a high degree of tunability of their spectral properties. We performed a systematic study on a metal-insulator-nanostructured metal system with a ...

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