Посмотр Physics and Astronomy по дате публикации

Отображаемые элементы 1-20 из 794

    • Shear-free anisotropic cosmological models in f(R) gravity 

      Abebe, Amare; Momeni, Davood; Myrzakulov, Ratbay (General Relativity and Gravitation, 2016)
      We study a class of shear-free, homogeneous but anisotropic cosmological models with imperfect matter sources in the context of f (R) gravity. We show that the anisotropic stresses are related to the electric part of the Weyl tensor in such a way that they balance each other. We also show that within the class of orthogonal f (R) models, small perturbations of shear are damped, ...
      2025-01-24

    • The Method and Software for the Solution of Dynamic Waves Propagation Problem in Elastic Medium 

      Akhmetova, Z.; Zhuzbaev, S.; Boranbayev, S. (ACTA PHYSICA POLONICA A, 2016)
      2025-01-27

    • States of 13C with abnormal radii 

      Demyanova, A.S.; Ogloblin, A.A.; Danilov, A.N.; Goncharov, S.A.; Belyaeva, T.L.; Sobolev, Yu.G.; Khlebnikov, S.V.; Burtebaev, N.; Trzaska, W.; Heikkinen, P.; Tyurin, G.P.; Janseitov, D.; Gurov, Yu.B. (EPJ Web of Conferences, 2016)
      2025-01-24

    • Generalized second law of thermodynamics in f (R,T ) theory of gravity 

      Momeni, D.; Moraes, P.H.R.S.; Myrzakulov, R. (Astrophysics and Space Science, 2016)
      2025-01-21

    • Galileons, phantom fields, and the fate of the Universe 

      Shahalam, M.; Pacif, S. K. J.; Myrzakulov, R. (Eurasian Physical Technical Journal C, 2016)
      2025-01-21

    • Spherically Symmetric Solutions of Light Galileon 

      Momeni, D.; Houndjo, M. J. S.; Gudekli, E.; Rodrigues, M. E.; Alvarenga, F. G.; Myrzakulov, R. (International Journal of Theoretical Physics, 2016)
      2025-01-24

    • Phonon Assisted Resonant Tunneling and Its Phonons Control 

      Kusmartsev, F. V.; Krevchik, V. D.; Semenov, M. B.; Filatov, D. O.; Shorokhov, A. V.; Bukharaev, A. A.; Dakhnovsky, Y.; Nikolaev, A. V.; Pyataev, N. A.; Zaytsev, R. V.; Krevchik, P. V.; Egorov, I. A.; Yamamoto, K.; Aringazin, A. K. (JETP Letters, 2016)
      We observe a series of sharp resonant features in the tunneling differential conductance of InAs quantum dots. We found that dissipative quantum tunneling has a strong influence on the operation of nanodevices. Because of such tunneling the current–voltage characteristics of tunnel contact created between atomic force microscope tip and a surface of InAs/GaAs quantum dots ...
      2025-01-23

    • Cylindrical solutions in mimetic gravity 

      Momeni, Davood; Myrzakulov, Kairat; Myrzakulov, Ratbay; Raza, Muhammad (Eurasian Physical Journal C, 2016)
      This paper is devoted to investigate cylindrical solutions in mimetic gravity. The explicit forms of the metric of this theory, namely mimetic-Kasner (say) have been obtained. In this study we have noticed that the Kasner’s family of exact solutions needs to be reconsidered under this type of modified gravity. A no-go theorem is proposed for the exact solutions in the presence ...
      2025-01-17

    • Experimental Data of Research Using Ground-Penetrating Radar “Zond-12c” and Interpretation of Georadarograms 

      Iskakov, K.; Boranbayev, S.; Alimbayeva, Z.; Issin, B. (ACTA PHYSICA POLONICA A, 2016)
      The paper presents engineering methods for the interpretation of georadarograms. For this purpose experimental research using ground-penetrating radar “Zond-12c” were carried out, in which artificial objects, placed in the training laboratory ground, were studied. The aim of the research is the geophysical investigation of the structure of lower layers and presence of artificial ...
      2025-01-20

    • Dynamical instability of cylindrical symmetric collapsing star in generalized teleparallel gravity 

      Jawad, Abdul; Momeni, Davood; Rani, Shamaila; Myrzakulov, Ratbay (Astrophysics and Space Science, 2016)
      This paper is devoted to an analysis of the dynamical instability of a self-gravitating object that undergoes a collapse process. We take the framework of generalized teleparallel gravity with a cylindrically symmetric gravitating object. The matter distribution is represented by a locally anisotropic energy-momentum tensor. We develop basic equations such as the dynamical ...
      2025-01-20

    • Realization of Holographic Entanglement Temperature for a Nearly-AdS Boundary 

      Momeni, D.; Raza, M.; Gholizade, H.; Myrzakulov, R. (International Journal of Theoretical Physics, 2016)
      2025-01-23

    • Integrable hierarchies of Heisenberg ferromagnet equation 

      Nugmanova, G.; Azimkhanova, A. (Journal of Physics: Conference Series, 2016)
      In this paper we consider the coupled Kadomtsev-Petviashvili system. From compatibility conditions we obtain the form of matrix operators. After using a gauge transformation, obtained a new type of Lax representation for the hierarchy of Heisenberg ferromagnet equation, which is equivalent to the gauge coupled Kadomtsev-Petviashvili system.
      2025-01-21

    • Numerical Simulation of Temperature Distribution Field in Beam Bulk in the Simultaneous Presence of Heat Insulation, Heat Flux and Heat Exchange 

      Kudaykulova, A.; Zhumadillayeva, A. (ACTA PHYSICA POLONICA A, 2016)
      2025-01-23

    • The cluster and single-particle states in 13C (α,α)13C reactions 

      Mynbayev, N A; Nurmukhanbetova, A K; Goldberg, V Z; Rogachev, G V; Golovkov, M S; Koloberdin, M; Ivanov, I; Nauruzbayev, D K; Berdibek, Sh S; Rakhymzhanov, A M; Tribble, R E (Journal of Physics: Conference Series, 2016)
      The excitation functions of elastic scattering of 13C on alpha particle have been measured using the thick-target inverse kinematic method at the heavy ion DC-60 cyclotron. The helium gas was used as a target and also as a degrader to stop the beam. New data (including 180°degree) of the resonances close to the threshold in 17O have been obtained.
      2025-01-27

    • Indirect study of the 16O+16O fusion reaction toward stellar energies by the Trojan Horse Method 

      Hayakawa, S.; Spitaleri, C.; Burtebayev, N.; Aimaganbetov, A.; Figuera, P.; Fisichella, M.; Guardo, G.L.; Igamov, S.; Indelicato, I.; Kiss, G.; Kliczewski, S.; Cognata, M. La; Lamia, L.; Lattuada, M.; Piasecki, E.; Rapisarda, G.G.; Romano, S.; Sakuta, S.B.; Siudak, R.; Trzcinska, A.; Tumino, A.; Urkinbayev, A. (EPJ Web of Conferences, 2016)
      The 16O+16O fusion reaction is important in terms of the explosive oxygen burning process during late evolution stage of massive stars as well as understanding of the mechanism of low-energy heavy-ion fusion reactions. We aim to determine the excitation function for the most major exit channels, α+28Si and p+31P, toward stellar energies indirectly by the Trojan Horse Method ...
      2025-01-21

    • Inflation Driven by q-de Sitter 

      Неизвестный автор (International Journal of Theoretical Physics, 2016)
      2025-01-21

    • Mimetic Attractors 

      Raza, Muhammad; Myrzakulov, Kairat; Momeni, Davood; Myrzakulov, Ratbay (International Journal of Theoretical Physics, 2016)
      In this paper,we investigate the mathematical modeling for the cosmological attractors propagated in mimetic gravity upon which an interacting dark energy-dark matter is supposed to be existed. The average value of the interaction of these percentages, namely i say, may be used to investigate generally the modeling of an attractor; the actual value could only be determined ...
      2025-01-22

    • k-essence in Horndeski models 

      Myrzakul, Shynaray; Myrzakulov, Ratbay; Sebastiani, Lorenzo (Astrophysics and Space Science, 2016)
      In this paper, we investigate a simple class of Horndeski models where the scalar field plays the role of a k-essence fluid. We present several solutions for earlytime universe, namely inflation and cosmological bounce, by making use of some reconstruction technique. Moreover, we furnish the formalism to calculate perturbations in FRW space-time and we compute the spectral ...
      2025-01-22

    • Higher-Twist Mechanism and Inclusive Gluon Production in Pion-Proton Collisions 

      Ahmadov, A. I.; Aydin, C.; Myrzakulov, R.; Uzun, O. (Journal of Physics: Conference Series, 2016)
      We calculate the contribution of the higher-twist Feynman diagrams to the largepT inclusive gluon production cross section in πp collisions incase of the running coupling and frozen coupling approaches within perturbative and holographic QCD. The structure of infrared renormalon singularities of the higher-twist subprocess cross section are obtained and the resummed higher-twist ...
      2025-01-21

    • Non-local F(R)-mimetic gravity 

      Myrzakulov, Ratbay; Sebastiani, Lorenzo (Astrophysics and Space Science, 2016)
      2025-01-23