Physics and Astronomy: Недавние поступления

Отображаемые элементы 361-380 из 794

    • STATIC INTERACTION OF ROUGH SURFACES UNDER NORMAL FORCE 

      Khairaliyev, S.; Kaishubayeva, N.; Spitas, Ch.; Dzhundibayev, V. (Eurasian Physical Technical Journal, 2020)
      Modern mechanical engineering designs (and some others) make more and more demands on the development of mathematical models of units in which friction is present. A condition that significantly complicates the study of the properties of a frictional contact is its discreteness with different geometric parameters of two contacting bodies, as a result of which the contact ...
      2025-01-24

    • 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

    • Starobinsky model with a viscous fluid 

      Myrzakulov, Y.; Sharlez, A.; Myrzakul, S.; Yergaliyeva, G. (International Journal of Mathematics and Physics, 2022)
      2025-01-24

    • 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

    • Spectrum of Primordial Gravitational Waves in Modified Gravities: A Short Overview 

      Odintsov, Sergei D.; Oikonomou, Vasilis K.; Myrzakulov, Ratbay (Symmetry, 2022)
      Odintsov, S.D.; Oikonomou, V.K.; Myrzakulov, R. Spectrum of Primordial Gravitational Waves in Modified Gravities: A Short Overview. Symmetry 2022, 14, 729. https://doi.org/10.3390/ sym14040729
      2025-01-24

    • Single-phase BiFeO3 and BiFeO3–Fe2O3 nanocomposite photocatalysts for photodegradation of organic dye pollutants 

      Banoth, Pravallika; Palajonnala, Boya; Valladares, Luis De Los Santos; Kargine, Jumat; Kolluv, Pratap (Nanoscale Advances, 2023)
      2025-01-24

    • Sign Language Recognition Method Based on Palm Definition Model and Multiple Classification 

      Amangeldy, Nurzada; Kudubayeva, Saule; Kassymova, Akmaral; Karipzhanova, Ardak; Razakhova, Bibigul; Kuralov, Serikbay (Sensors, 2022)
      Amangeldy, N.; Kudubayeva, S.; Kassymova, A.; Karipzhanova, A.; Razakhova, B.; Kuralov, S. Sign Language Recognition Method Based on Palm Definition Model and Multiple Classification. Sensors 2022, 22, 6621. https://doi.org/10.3390/s22176621
      2025-01-24

    • Shell model calculations for deformed Li isotopes 

      Azhibekov, A.K.; Samarin, V.V.; Kuterbekov, K.A.; Naumenko, M.A. (Eurasian Journal of Physics and Functional Materials, 2019)
      The nuclear shell model and its application to studying the structure of nuclei with deformed and spherical shapes are discussed. Calculations of level energies and wave functions in the shell model of deformed and spherical nuclei are performed for 7,8,11Li nuclei. A detailed calculation scheme for solving the radial Schrodinger equation is presented.
      2025-01-24

    • 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

    • Setup for the study of the paramagnetic resonance of neutrons of the first kind 

      Tsulaia, M.I; Berikov, D.B.; Salamatin, I.M.; Mareev, Yu.D.; Kopatch, Yu.N.; Zhumadilov, K.Sh. (Eurasian Journal of Physics and Functional Materials, 2018)
      The experimental setup KOLKHIDA has been designed to study the interactions of polarized neutrons with polarized nuclei, in particular to study the neutron nuclear precession (nuclear pseudomagnetism) and also for studying magnetic properties of crystals. The investigation has been performed at the Frank Laboratory of Neutron Physics, JINR
      2025-01-24

    • Continuous Sign Language Recognition and Its Translation into Intonation-Colored Speech 

      Amangeldy, Nurzada; Ukenova, Aru; Bekmanova, Gulmira; Razakhova, Bibigul; Milosz, Marek; Kudubayeva, Saule (Sensors, 2023)
      This article is devoted to solving the problem of converting sign language into a consistent text with intonation markup for subsequent voice synthesis of sign phrases by speech with intonation. The paper proposes an improved method of continuous recognition of sign language, the results of which are transmitted to a natural language processor based on analyzers of morphology, ...
      2025-01-24

    • Sensitivity Enhancement of CO2 Sensors at Room Temperature Based on the CZO Nanorod Architecture 

      Soltabayev, Baktiyar; Raiymbekov, Yessimzhan; Nuftolla, Aidarbek; Turlybekuly, Amanzhol; Yergaliuly, Gani; Mentbayeva, Almagul (ACS Sensors, 2024)
      2025-01-24

    • Selection of rotating entrance window and target parameters for a gas-filled separator operating at high intensive heavy ion beams 

      Ibadullayev, D (Journal of Physics: Conference Series, 2019)
      The durability of the targets and entrance window foils of the Dubna gas-filled recoil separator working at high intensive heavy ion beams was considered. The temperature, as a factor determining their durability, was calculated as a function of time in the conditions of their pulsed heating by heavy ion beam, followed by radiative cooling by radiation emitted from their ...
      2025-01-24

    • Selection of mathematical model of on-board capacity energy storage as element of hybrid traction unit of motor car rolling stock 

      Mezitis, Mareks; Panchenko, Vladyslav; Yatsko, Serhiy; Vashchenko, Yaroslav; Sidorenko, Anatoliy; Sansyzbajeva, Zura (KAUNAS, LITHUANIA, 2021)
      The authors of the study work out to determinate of the mathematical model of supercapacitors as an object of an electric traction system capable of providing non-encumbering of obtaining research results and correct reproduction of energy exchange processes in conditions of repeated-short-term modes of traction load operation. In paper, authors make a comparative assessment ...
      2025-01-24

    • Scenario of the evolution of the universe with equation of state of the Weierstrass type gas 

      Tsyba, Pyotr; Razina, Olga; Barkova, Zinaida; Bekov, Sabit; Myrzakulov, Ratbay (Journal of Physics: Conference Series, 2019)
      In this article, we examined the Starobinsky gravity model in homogeneous and isotropic space-time described by the Friedman-Robertson-Walker metric. In the framework of this model, cosmological parameters were described that explain it in the early and late evolutionary times, such as the slow roll parameters, perturbation of curvature, scalar-tensor ratio, equation of state ...
      2025-01-24

    • Scalar tensor Horndeski models: simple cosmological applications 

      Myrzakulov, Ratbay; Sebastiani, Lorenzo (Astrophysics and Space Science, 2016)
      In this paper, we analyze a simple class of Horndeski scalar-tensor theory. We investigate several cosmological solutions for inflation, bounce scenario and finite future-time singularities. Perturbations respect to Friedmann-Robertson-Walker metric are studied and discussed in the context of inflation.
      2025-01-24

    • Scalar field dark energy: insights into cosmological evolution and black hole accretion 

      Koussour, M.; Sekhmani, Y.; Alfedeel, Alnadhief H. A.; Awad, F.; Myrzakulov, N. (THE EUROPEAN PHYSICAL JOURNAL PLUS, 2023)
      2025-01-24

    • Soliton solution for the integrable spin model with self-consistent potential 

      Sagidullayeva, Zhanna (Journal of Physics: Conference Series, 2023)
      Integrable spin systems with potential are of great interest from the point of view of theoretical and applied physics. They make it possible to obtain accurate analytical solutions and study the properties of solitons - nonlinear wave structures that can be stable and move without distortion. The study of solitons in spin systems is of great importance not only for developing ...
      2025-01-24

    • Cosmic expansion beyond CDM: investigating power-law and logarithmic corrections 

      Koussour, M. x; Kavya, N. S.; Venkatesha, V.; Myrzakulov, N. (The European Physical Journal C, 2024)
      2025-01-24

    • Exact solution of Bardeen black hole in Einstein–Gauss–Bonnet gravity 

      Kumar, Amit; Veer Singh, Dharm; Myrzakulov, Yerlan; Yergaliyeva, Gulmira; Upadhyay, Sudhaker (THE EUROPEAN PHYSICAL JOURNAL PLUS, 2023)
      We have obtained a new exact regular black hole solution for the EGB gravity coupled with nonlinear electrodynamics in AdS space. The numerical analysis of horizon structure suggests two horizons exist: Cauchy and event. We also study the thermal properties of this black hole, which satisfy the modified first law of thermodynamics. Moreover, we analyze the local and global stability ...
      2025-01-24
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