Отображаемые элементы 141-160 из 5785

    • Exploring non-perturbative effects on quasi-topological black hole thermodynamics 

      Srivastava, Vivek Kumar; Upadhyay, Sudhaker; Verma, Alok Kumar; Singh, Dharm Veer; Myrzakulov, Yerlan; Myrzakulov, Kairat (Physics of the Dark Universe, 2025)
      We examine the impact of non-perturbative quantum corrections on the entropy of both charged and charged rotating quasi-topological black holes, focusing on their thermodynamic properties. The negative-valued correction to the entropy for small black holes is unphysical. Furthermore, we analyze the effect of these non-perturbative corrections on other thermodynamic quantities, ...
      2026-03-27
    • Exploring late-time cosmic acceleration: A study of a linear f(T) cosmological model using observational data 

      Zhadyranova, A.; Koussour, M.; Bekkhozhayev, S.; Zhumabekova, V.; Rayimbaev, J. (Physics of the Dark Universe, 2024)
      Understanding the evolution of dark energy poses a significant challenge in modern cosmology, as it is responsible for the universe's accelerated expansion. In this study, we focus on a specific f(T) cosmological model and analyze its behavior using observational data, including 31 data points from the CC dataset, 1048 points from the Pantheon SNe Ia samples, and 6 points from ...
      2026-03-27
    • Exploring cosmological evolution and constraints in f(T) teleparallel gravity 

      Koussour, M.; Altaibayeva, A.; Bekov, S.; Holmurodov, F.; Muminov, S.; Rayimbaev, J. (Physics of the Dark Universe, 2024)
      This study explores the extension of teleparallel gravity within the framework of general relativity, introducing an algebraic function f(T) dependent on the torsion scalar T. Motivated by the teleparallel formulation, we investigate cosmological implications, employing the simplest parametrization of the dark energy equation of state. Our chosen f(T) function, f(T)=α(−T)n, ...
      2026-03-27
    • Effect of ion-induced dislocation hardening on diffusion and gas swelling mechanisms in carbide ceramics 

      Shlimas, Dmitriy. I.; Borgekov, Daryn B.; Tynyshbayeva, Kymbat M.; Giniyatova, Sholpan G.; Moldabayeva, Gulnaz Zh.; Kozlovskiy, Artem L. (Eurasian Journal of Physics and Functional Materials, 2024)
      The paper presents the assessment results of the application of the method of ion modification of the near-surface layer of SiC ceramics in order to create a dislocation hardening effect to enhance the resistance of ceramics to helium swelling and embrittlement. Interest in this topic is due to the possibilities of expanding the practical application of ion modification in the ...
      2026-03-27
    • Dynamics of Neutron Transfer in the Reaction 3He + 9Be 

      Azhibekov, Aidos K.; Almanbetova, Englik K.; Naumenko, Mikhail A.; Mendibayev, Kairat O.; Lukyanov, Sergey M.; Issatayev, Talgat G.; Urazbekov, Bakhytzhan A.; Kabyshev, Asset M.; Dyussebayeva, Kuralay; Zholdybayev, Timur K. (Physics, 2024)
      The paper presents the results of experiments on measuring cross-sections for the neutron transfer channels 9Be(3He, α) 8Begs,3.03 in the reaction of the 3He (30 MeV) ions with the 9Be target. To describe the angular distributions, we use the Distorted Wave Born Approximation (DWBA) applying the FRESCO code. The results of the theoretical analysis are in agreement with the ...
      2026-03-27
    • DJ-1 protects proteins from acylation by catalyzing the hydrolysis of highly reactive cyclic 3-phosphoglyceric anhydride 

      Akhmadi, Aizhan; Yeskendir, Adilkhan; Dey, Nelly; Mussakhmetov, Arman; Shatkenova, Zariat; Kulyyassov, Arman; Andreeva, Anna; Utepbergenov, Darkhan (Nature Communications, 2024)
      Mutations in the human PARK7 gene that encodes protein DJ-1 lead to familial Parkinsonism due to loss of dopaminergic neurons. However, the molecular function of DJ-1 underpinning its cytoprotective effects are unclear. Recently, DJ-1 has been shown to prevent acylation of amino groups of proteins and metabolites by 1,3-bisphosphoglycerate. This acylation is indirect and ...
      2026-03-27
    • DFOS Technology in Geoengineering Monitoring in the Past 35 Years: A Bibliometric Analysis 

      Wang, Jia; Garg, Ankit; Satyam, Neelima; Zhussupbekov, Askar; Sushkova, Svetlana (Sensors, 2024)
      DFOS (distributed fiber-optic sensing) technology has shown the potential to increase the accuracy of measurement after years of development and experimenting in geoengineering monitoring. To better understand the development of DFOS technology and its contribution to geoengineering, an objective and data-driven review of the development process of DFOS technology in construction ...
      2026-03-27
    • Development of New Composite Materials by Modifying the Surface of Porous Hydroxyapatite Using Cucurbit[n]urils 

      Burkhanbayeva, Tolkynay; Ukhov, Arthur; Fedorishin, Dmitry; Gubankov, Alexander; Kurzina, Irina; Bakibaev, Abdigali; Yerkassov, Rakhmetulla; Mashan, Togzhan; Suyundikova, Faiziya; Nurmukhanbetova, Nurgul; Khamitova, Aina (Materials, 2024)
      This study represents an advancement in the field of composite material engineering, focusing on the synthesis of composite materials derived from porous hydroxyapatite via surface modification employing cucurbit[n]urils, which are highly promising macrocyclic compounds. The surface modification procedure entailed the application of cucurbit[n]urils in an aqueous medium onto ...
      2026-03-27
    • Development of an Artificial Vision for a Parallel Manipulator Using Machine‑to‑Machine Technologies 

      Nussibaliyeva, Arailym; Sergazin, Gani; Tursunbayeva, Gulzhamal; Uzbekbayev, Arman; Zhetenbayev, Nursultan; Nurgizat, Yerkebulan; Bakhtiyar, Balzhan; Orazaliyeva, Sandugash; Yussupova, Saltanat (Sensors, 2024)
      This research focuses on developing an artificial vision system for a flexible delta robot ma‑ nipulator and integrating it with machine‑to‑machine (M2M) communication to optimize real‑time device interaction. This integration aims to increase the speed of the robotic system and improve its overall performance. The proposed combination of an artificial vision system with M2M ...
      2026-03-27
    • Development of an Ankle Exoskeleton: Design, Modeling, and Testing 

      Sergazin, Gani; Ozhiken, Assylbek; Zhetenbayev, Nursultan; Ozhikenov, Kassymbek; Tursunbayeva, Gulzhamal; Nurgizat, Yerkebulan; Uzbekbayev, Arman; Ayazbay, Abu-Alim (Sensors, 2025)
      This research presents the results of conceptual design and modeling of an exoskeleton. It is intended for ankle joint rehabilitation in patients with musculoskeletal disorders. The exoskeleton design includes three screw actuators that smoothly control motion in the planes of dorsal and plantar flexion, inversion, and eversion. The results of the virtual tests performed on ...
      2026-03-27
    • Development of a Flexible Information Security Risk Model Using Machine Learning Methods and Ontologies 

      Barlybayev, Alibek; Sharipbay, Altynbek; Shakhmetova, Gulmira; Zhumadillayeva, Ainur (Applied Sciences, 2024)
      This paper presents a significant advancement in information security risk assessment by introducing a flexible and comprehensive model. The research integrates established standards, expert knowledge, machine learning, and ontological modeling to create a multifaceted approach for understanding and managing information security risks. The combination of standards and ...
      2026-03-27
    • Development of a Discrete Algorithm for Interpreting Ground-Penetrating Radar Data in Vertically Heterogeneous Media 

      Iskakov, Kazizat; Tatin, Almaz; Glazyrina, Natalya; Kussainova, Ainur; Uzakkyzy, Nurgul; Sagindykov, Kakim (Applied Sciences, 2025)
      This study presents the development of a discrete algorithm for interpreting groundpenetrating radar (GPR) data in vertically inhomogeneous media for the diagnostics of road structures. Experimental data were obtained using an OKO-2 GPR system, followed by primary radargram processing using the CartScan software. This included noise and interference filtering, as well as the ...
      2026-03-27
    • Development and investigation of a porous metal-ceramic substrate for solid oxide fuel cells 

      Opakhai, Serikzhan; Kuterbekov, Kairat; Zeinulla, Zhasulan; Atamurotov, Farruh (International Journal of Thermofluids, 2024)
      The process of creating a porous metal-ceramic material based on Ni-Al alloy and gadolinium-doped cerium oxide (CGO) using the thermal explosion method has been investigated. This study aims to analyze the effect of CGO on the thermal explosion parameters and the architecture of the resulting Ni-Al-CGO materials. In this regard, the influence of adding CGO powder to the ...
      2026-03-27
    • Determination of variation of compositions of (1-х) ZnO-0.25Al2O3-0.25WO3-хBi2O3 glass-like ceramics on protective characteristics in gamma radiation shielding 

      Seitbayev, A.; Kozlovskiy, A.; Giniyatova, S.; Borgekov, D. (International Journal of Mathematics and Physics, 2024)
      The work is devoted to the study of the effect of variation of the ratio of oxides in the composition of (1-х)ZnO-0.25Al2O3-0.25WO3-хBi2O3 glass-like ceramics on shielding characteristics when employed as materials to mitigate the adverse effects of gamma radiation with different energy. The primary incentive behind these investigations is to discover novel protective shielding ...
      2026-03-27
    • Determination of the influence of temperature factors on the softening of the near-surface layer of BeO ceramics under highdose irradiation with helium ions 

      Kozlovskiy, Artem L.; Ryskulov, Azamat E.; Ivanov, Igor A.; Zhumakhanova, Gulnur; Popov, Anatoly; Konuhova, Marina (Eurasian Journal of Physics and Functional Materials, 2025)
      Interest in BeO ceramics as structural materials for new generation reactors, despite the fairly active research of this type of ceramics previously, is primarily due to the combination of their thermophysical, strength and mechanical properties, as well as a low neutron capture cross-section, which allows them to be considered as one of the most promising materials for the ...
      2026-03-27
    • Design, Simulation and Functional Testing of a Novel Ankle Exoskeleton with 3DOFs 

      Sergazin, Gani; Zhetenbayev, Nursultan; Tursunbayeva, Gulzhamal; Uzbekbayev, Arman; Sarina, Aizada; Nurgizat, Yerkebulan; Nussibaliyeva, Arailym (Sensors, 2024)
      This paper presents a study on developing a new exoskeleton for ankle joint rehabilitation with three degrees of freedom (3 DOFs). The primary attention is paid to the process of designing and modelling the device aimed at restoring the lost functions of joint mobility. The authors conducted a complex analysis of the functional requirements of the exoskeleton based on research ...
      2026-03-27
    • Design of Conical Foundations with Increased Bearing Capacity in Areas of Undermined Soils 

      Zhussupbekov, Askar; Sarsembayeva, Assel; Bazarov, Baurzhan; Omarov, Abdulla (Applied Sciences, 2024)
      This article discusses the foundations of a conical shape directed with their apex downwards to increase the cross-sectional area and, accordingly, the bearing capacity during settlement and under the influence of horizontal tensile strains in undermined areas. To simulate the deformability of undermined and seismically exposed foundations, a three-dimensional expandable box ...
      2026-03-27
    • Designing and Planning of Studies of Driver Behavior at Pedestrian Crossings Using Whole-Vehicle Simulators 

      Burdzik, Rafał; Siminski, Dawid; Kruszewski, Mikołaj; Niedzicka, Anna; Gasiorek, Kamila; Zabieva, Aliya Batyrbekovna; Mamala, Jarosław; Debicka, Ewa (Applied Sciences, 2024)
      The paper presents a proposed methodology for designing and planning research on driver behavior at pedestrian crossings using whole-vehicle simulators. It was assumed that dedicated research should be conducted in specific problem contexts. The problems identified were the identification of hazards and the risk of accidents involving vulnerable road users. The purpose of this ...
      2026-03-27
    • D-brane and exponential potentials inspire warm inflation a swampland conjecture 

      Sadiq, Shama; Azhar, Nadeem; Myrzakulov, N.; Toktarbay, S.; Muratkhan, A.; Shaymatov, Sanjar; Jawad, Abdul (Nuclear Physics, Section B, 2025)
      This research explores the rapid expansion period of the early universe by applying the Chaplygin gas model, an alternative cosmological framework, to analyze the dynamics of inflationary processes. This study assesses the compatibility of three widely studied scalar field potentials with the latest observational constraints derived from the Planck datasets. Our analysis includes ...
      2026-03-27
    • Dark energy and dark matter configurations for wormholes and solitionic hierarchies of nonmetric Ricci flows and F(R,T,Q,Tm) gravity 

      Bubuianu, Laurenţiu; Vacaru, Sergiu; Veliev, Elşen Veli; Zhamysheva, Assel (European Physical Journal C, 2024)
      We extend the anholonomic frame and connection deformation method, AFCDM, for constructing exact and parametric solutions in general relativity, GR, to geometric flow models and modified gravity theories, MGTs, with nontrivial torsion and nonmetricity fields. Following abstract geometric or variational methods, we can derive corresponding systems of nonmetric gravitational and ...
      2026-03-27