AUB ScholarWorks

Browsing Department of Physics by Title

Browsing Department of Physics by Title

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  • Kasner branes with arbitrary signature 
    Sabra, Wafic A. (Elsevier B.V., 2020)
    We present static and time-dependent solutions for the theory of gravity with a dilaton field and an arbitrary rank antisymmetric tensor. The solutions constructed are valid for arbitrary space-time dimensions and signatures. ...
  • Kasner metrics and very special geometry 
    Sabra, Wafic A. (Elsevier B.V., 2022)
    We consider general charged Kasner-like solutions for the theory of five-dimensional supergravity coupled to Abelian vector multiplets in arbitrary space-time signature. These solutions, depending on the choice of coordinates, ...
  • Kinetic roughening of the urban skyline 
    Najem, Sara A.; Krayem, Alaa; Ala-Nissilä, Tapio; Grant, Martin L. (American Physical Society, 2020)
    We analyze the morphology of the modern urban skyline in terms of its roughness properties. This is facilitated by a database of 107 building heights in cities throughout the Netherlands which allows us to compute the ...
  • Koopman operator for Burgers's equation 
    Balabane, Mikhaël; Méndez, Miguel Alfonso; Najem, Sara A. (American Physical Society, 2021)
    We consider the flow of Burgers's equation on an open set of (small) functions in L2([0,1]). We derive explicitly the Koopman decomposition of the Burgers flow. We identify the frequencies and the coefficients of this ...
  • Laplace surface dynamics, revisited: Satellites, exoplanets, and debris with distant, eccentric companions 
    Farhat, Mohammad A.; Touma, Jihad R. (Oxford University Press, 2021)
    To date, studies of Laplace surface dynamics have concerned themselves with test particle orbits of fixed shape and orientation in the combined field of an oblate central body (to which the particle is bound) and a distant, ...
  • Machine learning for buildings' characterization and power-law recovery of urban metrics 
    Krayem, Alaa; Yeretzian, Aram; Faour, Ghaleb; Najem, Sara A. (Public Library of Science, 2021)
    In this paper we focus on a critical component of the city: its building stock, which holds much of its socio-economic activities. In our case, the lack of a comprehensive database about their features and its limitation ...
  • Magnetic property, DFT calculation, and biological activity of bis[(μ2-chloro)chloro(1,10-phenanthroline)copper(II)] complex 
    Mroueh, Mohamad A.; Daher, Costantine F.; Hariri, Essa H.; Demirdjian, Sally; Isber, Samih; Choi, Eunsang; Mirtamizdoust, Babak; Hammud, Hassan Hasan (Elsevier Ireland Ltd, 2015)
    The dinuclear complex bis[(μ2-chloro)chloro(1,10-phenanthroline)copper(II)] (1) was synthesized, and characterized by X-ray, FTIR and thermal analysis. The fitting of magnetic susceptibility and magnetization curve of (1) ...
  • Measuring spin wave resonance in Ni100-xFex films: Compositional and temperature dependence 
    Haidar, Mohammad; Isber, Samih; Åkerman, Johan J. (IOP Publishing Ltd, 2021)
    We study the composition and temperature dependence of the spin wave resonance in Ni100-xFex films, where, x is 40% or below, with a thickness of 100 nm using a temperature variable broadband ferromagnetic resonance (FMR) ...
  • Melvin space-times in supergravity 
    Sabra, Wafic A. (Elsevier B.V., 2023)
    We consider Melvin-like cosmological and static solutions for the theories of N=2, D=4 supergravity coupled to vector multiplets. We analyze the equations of motion and give some explicit solutions with one scalar and two ...
  • Mid-IR photothermal beam deflection technique for fast measurement of thermal diffusivity and highly sensitive subsurface imaging 
    Younes, Joan; Harajli, Zeinab; Soueidan, Maher; Fabrègue, Damien; Zaatar, Youssef; Kazan, Michel (American Institute of Physics Inc., 2020)
    The resonances of phonon and plasmon modes make the absorbance coefficient of materials tremendously high in the mid-infrared spectral range, which allows for a mid-infrared excitation laser to heat the surface layers of ...
  • Mid-IR photothermal measurement of substantial heat transport by surface waves of polar amorphous films supported on silicon 
    Hamyeh, S.; Tauk, Rabih; Adam, Pierre Michel; Kazan, Michel (American Institute of Physics Inc., 2020)
    We present measurements of significant thermal diffusivity by surface electromagnetic waves of an ultra-thin polar and amorphous dielectric film deposited on silicon (Si). We used a photothermal-beam-deflection technique ...
  • Mimetic Horava and surface terms 
    Malaeb, O.; Saghir, Chireen A. (Springer, 2023)
    We consider mimetic Horava gravity, where the scalar field of mimetic gravity was used in the construction of diffeomorphism invariant models reducing to Horava gravity in the synchronous gauge. It will be shown that the ...
  • Mimetic Hořava gravity 
    Chamseddine, Ali H.; Mukhanov, Viatcheslav F.; Russ, Tobias B. (Elsevier B.V., 2019)
    We show that the scalar field of mimetic gravity could be used to construct diffeomorphism invariant models that reduce to Hořava gravity in the synchronous gauge. The gradient of the mimetic field provides a timelike unit ...
  • Mimetic inflation and self-reproduction 
    Chamseddine, Ali H.; Khaldieh, M.; Mukhanov, Viatcheslav F. (Institute of Physics, 2023)
    It is shown how self-reproduction can be easily avoided in the inflationary universe, even when inflation starts at Planck scales. This is achieved by a simple coupling of the inflaton potential with a mimetic field. In ...
  • Mimetic massive gravity: beyond linear approximation 
    Chamseddine, Ali H.; Mukhanov, Viatcheslav F. (Springer Verlag, 2018)
    We present a theory of ghost-free massive gravity where the mass of the graviton is generated through the Brout-Englert-Higgs (BEH) mechanism and one of the four scalar fields used is that of mimetic gravity. The mass term ...
  • Modelling intra-dependencies to assess road network resilience to natural hazards 
    Der Sarkissian, Rita; Abdallah, Chadi; Zaninetti, Jean Marc; Najem, Sara A. (Springer Science and Business Media B.V., 2020)
    Estimating the resilience of a road network (one of the essential critical infrastructures in times of crisis) to natural hazards is crucial in achieving the goals of disaster risk reduction (DRR). This study proposes a ...
  • Modification of the phonon spectrum of bulk Si through surface nanostructuring 
    Iskandar, A.; Gwiazda, Agnieszka; Huang, Y.; Kazan, Michel; Bruyant, Aurélien; Tabbal, Malek; Lérondel, Gilles (American Institute of Physics Inc., 2016)
    In this paper, we present experimental evidence on the change of the phonon spectrum and vibrational properties of a bulk material through phonon hybridization mechanisms. The phonon spectrum in a finite material is strongly ...
  • Modulating near-field heat transfer using oxygen-contaminated piezoelectric aluminum nitride nanomaterials 
    Baltaji, R.; Kazan, Michel (American Institute of Physics Inc., 2019)
    We investigate the modulation of near-field heat transfer between piezoelectric aluminum nitride thin plates and nanospheres. Temperature-dependent infrared spectroscopic measurements showed soft phonon modes indicating a ...
  • 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 ...

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