AUB ScholarWorks

Browsing Department of Physics by Title

Browsing Department of Physics by Title

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  • The effect of nanosized CoFe2O4 addition on the magnetic properties of GdBa2Cu3O7-δ using AC magnetic susceptibility measurements 
    Awad, Ramadan; Mohammed, N. H.; Abou-Aly, Aly Ibrahim; Isber, Samih; Motaweh, Hussien A.; El-Said Bakeer, Douaa; Roumié, Mohamad (Tsinghua University, 2016)
    Superconductor samples of type (CoFe2O4)xGdBa2Cu3O7-δ (0≤x≤0.1) were synthesized by the conventional solid-state reaction technique, whereas nanosized CoFe2O4 was prepared by co-precipitation method with grain size of about ...
  • The effect of temperature on the electrical and thermal conductivity of graphene-based polymer composite films 
    Tarhini, Ali A.; Alchamaa, M. Walid; Khraiche, Massoud Louis; Kazan, Michel; Tehrani-Bagha, A. R. (John Wiley and Sons Inc, 2022)
    In this work, we studied the effect of temperature on the electrical, thermal, and mechanical properties of graphene-based poly(vinylidene fluoride-co-hexafluoropropylene) composites. Graphene-based polymer composites ...
  • The Polaris Linear Plasma Device 
    Antar, Ghassan Y.; Younes, Joan; Darwish, Marwan S.; Costantine, Joseph; Roumié, Mohamad; Habchi, Charbel (Institute of Electrical and Electronics Engineers Inc., 2021)
    We report the construction of Polaris, a new linear plasma device with an axial magnetic field dedicated to research and education at the American University of Beirut in Lebanon. The goal is to initiate the investigation ...
  • The potential of urban distributed solar energy in transition economies: The case of Beirut city 
    Eslami, Hossein; Najem, Sara A.; Abi Ghanem, Dana; Ahmad, Ali (Academic Press, 2021)
    In this paper, using Lebanon's capital, Beirut, as a case study, a methodology is proposed to assess the potential for solar photovoltaics (PV) in urban areas incorporating both economic and non-economic factors. Utilizing ...
  • The properties of the tungsten coating on fine grain graphite using pulsed laser deposition 
    Antar, Ghassan Y.; Ali, J.; Madi, Charbel S.; Noun, Manale; Rohde, Volker; Roumié, Mohamad; Said, A. J.; Younes, Joan (Elsevier Ltd, 2019)
    The advantages of using a high-Z material as a plasma facing component (PFC) in fusion devices is now admitted, consequently, the International Thermonuclear Experimental Reactor (ITER) will have a solid tungsten divertor. ...
  • The Rarity of Very Red Trans-Neptunian Objects in the Scattered Disk 
    Ali-Dib, Mohamad; Marsset, Michael; Wong, Wingcheung; Dbouk, Rola (American Astronomical Society, 2021)
    We investigate the origins of the photometrically very red (VR) and less red (LR) trans-Neptunian objects (TNOs). We first reanalyze the data set of Marsset et al. and find that in addition to the known color-inclination ...
  • The role of the 1.5 order formalism and the gauging of spacetime groups in the development of gravity and supergravity theories 
    Chamseddine, Ali H.; West, Peter C. (World Scientific, 2022)
    The 1.5 formalism played a key role in the discovery of supergravity and it has been used to prove the invariance of essentially all supergravity theories under local supersymmetry. It emerged from the gauging of the super ...
  • The role of the plasma current in turbulence decrease during lower hybrid current drive 
    Antar, Ghassan Y.; Ekedahl, Annika C.; Goniche, Marc; Asghar, A.; Žáček, František (American Institute of Physics Inc., 2017)
    The interaction of radio frequency (RF) waves with edge turbulence has resurfaced after the results obtained on many tokamaks showing that edge turbulence decreases when the ion cyclotron frequency heating (ICRH) is switched ...
  • The spontaneous breaking of axisymmetry in shallow rotating flows 
    Antar, Ghassan Y.; Lalti, Ahmad; Habchi, Charbel (American Institute of Physics Inc., 2019)
    We show that the axial symmetry of a shallow rotating flow is spontaneously broken in the absence of an externally forced velocity gradient. It is caused by an instability excited by the gradients that arise from the ...
  • The statistical mechanics of self-gravitating Keplerian discs 
    Touma, Jihad R.; Tremaine, Scott D. (Institute of Physics Publishing, 2014)
    We describe the dynamics and thermodynamics of collisionless particle discs orbiting a massive central body, in the case where the disc mass is small compared to the central mass, the self-gravity of the disc dominates the ...
  • Transition from surface phonon-polariton to surface phonon-plasmon-polariton by thermal injection of free carriers 
    El-Helou, Youssef; Wu, Kuanting; Bruyant, Aurélien; Woon, Wei Yen; Kazan, Michel (IOP Publishing Ltd, 2022)
    Surface phonon-polariton, surface plasmon-polariton, and surface phonon-plasmon-polariton are evanescent electromagnetic waves confined to the surfaces of different classes of materials, which gives each of them particular ...
  • Transport properties of thermoplastic R-BAPB polyimide: Molecular dynamics simulations and experiment 
    Volgin, Igor V.; Andreeva, Maria V.; Larin, Sergey V.; Didenko, Andrey L.; Vaganov, Gleb V.; Borisov, Il'ya L.; Volkov, Alexey Vladimirovich; Klushin, Leonid I.; Lyulin, Sergey V. (MDPI AG, 2019)
    Thepresentwork evaluates the transportproperties of thermoplasticR-BAPBpolyimide based on 1,3-bis(3,30,4,40-dicarboxyphenoxy)benzene (dianhydride R) and 4,40-bis(4-aminophenoxy)biphenyl (diamine BAPB). Both experimental ...
  • Tuning electrical and thermal conductivities of the two-dimensional electron gas in AlN/GaN heterostructures by piezoelectricity 
    Abou-Hamdan, Loubnan; Hamyeh, S.; Iskandar, A.; Tauk, Rabih; Brault, Julien; Tabbal, Malek; Adam, Pierre Michel; Kazan, Michel (IOP Publishing Ltd, 2020)
    We investigate the electrical and thermal conductivities of the two-dimensional electron gas (2DEG) confined in the quantum well formed at the heterojunction between a thin GaN layer and an AlN layer strained by an Al x ...
  • Tuning the infrared dielectric and plasmonic properties of ZnO thin films on glass 
    Bozoian, S.; Kalaydjian, L.; Younes, Joan; Tabbal, Malek; Kazan, Michel (Elsevier B.V., 2023)
    Infrared reflectivity measurements are performed on c-axis oriented zinc oxide thin films deposited on glass by the pulsed laser deposition technique at 350 °C and 700 °C and for different deposition times to examine the ...
  • Tuning Transition Properties of Stimuli-Responsive Brushes by Polydispersity 
    Qi, Shuanhu; Klushin, Leonid I.; Skvortsov, Aleksander M.; Liu, Mingjie; Zhou, Jiajia; Schmid, Friederike (Wiley-VCH Verlag, 2018)
    A new design for sensors and switches based on polymer brushes including a small fraction of end-grafted adsorption-active minority chains has been proposed recently. The switching transition is controlled by temperature ...
  • Unexpected stray attractors in confined leader-follower dynamics driven by cone-of-vision interactions 
    Al-Sayegh, Amara A.; Najem, Sara A.; Klushin, Leonid I.; Touma, Jihad R. (Nature Publishing Group, 2019)
    Experiments with groups of fish inside a circular tank have provided valuable insights into the nature of leadership in social groups. Sophisticated mathematical models were constructed with a view to recovering observed ...
  • Unification of gauge and gravity Chern–Simons theories in 3-D space-time 
    Saghir, Chireen A.; Shamseddine, Laurence W. (Springer New York LLC, 2017)
    Chamseddine and Mukhanov showed that gravity and gauge theories could be unified in one geometric construction provided that a metricity condition is imposed on the vielbein. In this paper we are going to show that by ...
  • Urban energy modeling and calibration of a coastal Mediterranean city: The case of Beirut 
    Krayem, Alaa; Al Bitar, Ahmad; Ahmad, Ali; Faour, Ghaleb; Gastellu-Etchegorry, Jean Philippe; Lakkis, Issam A.; Adjizian-Gérard, Jocelyne; Zaraket, Haitham; Yeretzian, Aram; Najem, Sara A. (Elsevier Ltd, 2019)
    Urban expansion, driven by population and economic growth, has been a major contributor to increased levels of energy consumption across the globe. Beirut, Lebanon's capital, is no exception in facing a surge in its demand ...
  • Using Copolymers to Design Tunable Stimuli-Reponsive Brushes 
    Qi, Shuanhu; Klushin, Leonid I.; Skvortsov, Aleksander M.; Schmid, Friederike (American Chemical Society, 2020)
    Recently, a new design for switch sensors has been proposed that exploits a conformational transition of end-grafted minority adsorption-active homopolymers in a monodisperse polymer brush [Klushin et al. Phys. Rev. Lett. ...
  • Vlasov-poisson in 1D: Waterbags 
    Colombi, Stéphane T.; Touma, Jihad R. (Oxford University Press, 2014)
    We revisit in one dimension the waterbag method to solve numerically Vlasov-Poisson equations. In this approach, the phase-space distribution function f (x, v) is initially sampled by an ensemble of patches, the waterbags, ...

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