Научные статьи: Недавние поступления

Отображаемые элементы 41-60 из 5785

    • STUDY OF THE EFFECT OF THE FORMATION OF TWO-PHASE CERAMICS BASED ON NEODYMIUM ZIRCONATE DUE TO DOPING WITH MGO AND Y2O5 ON THE STABILITY OF STRENGTH AND THERMOPHYSICAL PARAMETERS UNDER IRRADIATION 

      Kozlovskiy, A.L.; Kabiyev, M.B.; Shlimas, D.I.; Uglov, V.V. (Eurasian Physical Technical Journal, 2024)
      The work presents the study results of the determination of the resistance of neodymium zirconate doped with MgO and Y2O5 to radiation damage stemming from irradiation with heavy ions akin to nuclear fuel fission fragments. The attraction towards this type of ceramics stems from its potential to raise the operational temperatures within the core of next-generation nuclear ...
      2026-03-30

    • STUDY OF THE EFFECT OF HEAT TRANSFER DURING MOLDING OF TERMOPLASTIC BERYLLIUM OXIDE CERAMICS 

      Esbol, Zh.; Sattinova, Z.K.; Turalina, D.E.; Mussenova, E.K. (Eurasian Physical Technical Journal, 2025)
      Beryllium oxide (BeO) ceramics formed with the use of ultrasound exhibit more intense sintering, lower shrinkage, and a reduced sintering temperature compared to ceramics produced without ultrasound. The effectiveness of ultrafast sintering is dependent on the cohesion of ceramic agglomeration and the proper arrangement of particles. Rheological properties thermoplastic ...
      2026-03-30

    • Study of the effect of phase formation processes on the change in optical and thermal properties of Nd2Zr2O7 ceramics with a pyrochlore structure 

      Kozlovskiy, Artem L.; Shlimas, Dmitriy I.; Volodina, Natalya; Moldabayeva, Gulnaz Zh; Kabiyev, Mussa; Konuhova, Marina (Optical Materials: X, 2025)
      The paper presents the results of studies of the influence of phase formation processes with variations in annealing temperature on the processes of stabilization of the crystal structure, optical and thermal properties of Nd2Zr2O7 ceramics, which have great potential for use in optoelectronic applications due to the transitions of Nd3 ions, as well as high stability to ...
      2026-03-30

    • Study of the application prospects of film detectors for estimation of α-radiation density 

      Yerimbetova, Dana S.; Konuhova, Marina; Kozlovskiy, Artem L.; Tuichiyev, Umitali N. (Optical Materials: X, 2025)
      The aim of this research is to study the prospects of using the proposed methods of optical UV spectroscopy and X-ray diffractometry to determine the radiation density of the daughter products of radon decay - α-particles recorded using polymer track detectors. This paper presents the results of experiments on detecting the daughter products of radon decay - α-particles in ...
      2026-03-30

    • Study of the applicability of ACdSe (A – Co, Ni) thin films as catalysts for heavy metal capture 

      Omarova, Aliya Zh; Kozlovskiy, Artem L.; Moldabayeva, Gulnaz Zh (Optical Materials: X, 2024)
      Expansion of the possibilities of using photoactive thin films with a unique combination of optical and morphological characteristics as a basis for creation of highly efficient catalysts for the aqueous media purifi cation is one of the promising research areas in modern materials science, which has both fundamental signif icance and potential for practical application. This ...
      2026-03-30

    • Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopy 

      Shlimas, Dmitriy I.; Khametova, Ainagul A.; Kozlovskiy, Artem L.; Zdorovets, Maxim V. (Optical Materials: X, 2025)
      The article presents the results of experimental studies of the effect of the stabilizing MgO dopant using the electron spin resonance (ESP) method on enhancement of the stability of Li2ZrO3 ceramics to defect formation processes and accumulation of radiolysis products in the near-surface layer in the case of high-dose irradiation with protons simulating the hydrogenation ...
      2026-03-30

    • Structural Changes in High-Entropy Alloys CoCrFeNi and CoCrFeMnNi, Irradiated by He Ions at a Temperature of 700 ◦C 

      Ivanov, Igor; Amanzhulov, Bauyrzhan; Uglov, Vladimir; Zlotski, Sergey; Kurakhmedov, Alisher; Koloberdin, Mikhail; Sapar, Asset; Ungarbayev, Yerulan; Zdorovets, Maxim (Materials, 2024)
      High-entropy alloys (HEA) are promising structural materials that will successfully resist high-temperature irradiation with helium ions and radiation-induced swelling in new generations of nuclear reactors. In this paper, changes in the elemental and phase composition, surface morphology, and structure of CoCrFeNi and CoCrFeMnNi HEAs irradiated with He2+ ions at a temperature ...
      2026-03-30

    • Stress Analysis in Tungsten Alloys Modified with Plasma Flows and Irradiated with Helium Ions 

      Ryskulov, Azamat; Shymanski, Vitaliy; Amanzhulov, Bauyrzhan; Ivanov, Igor; Uglov, Vladimir; Astashynski, Valiantsin; Koloberdin, Mikhail; Kuzmitski, Anton; Kurakhmedov, Alisher (Coatings, 2025)
      As the development of nuclear fusion depends on plasma-facing materials, new methods for improving the radiation resistance of tungsten are being created and tested. This paper presents the results of studying the structure, surface morphology, phase composition, and residual internal stresses in tungsten alloys modified by plasma flows and irradiated with helium ions with ...
      2026-03-30

    • Stability of compact stars in a uniform density background cloud 

      Singh, Ksh. Newton; Maurya, S. K.; Errehymy, A.; Donmez, O.; Myrzakulov, K.; Smitha, T. T. (European Physical Journal C, 2024)
      We are discussing a scenario where a compact star (neutron star, NS) is embedded in a thin, uniform density background cloud (a remnant cloud after a supernova or a cloud generated from the late stages of a star e.g., a planetary nebula or asymptotic red giant phases) and its effect on the stability of the compact star. Due to the thin background cloud, the spacetime geometry is ...
      2026-03-30

    • Specifics of Data Collection and Data Processing during Formation of RailVista Dataset for Machine Learning- and Deep Learning-Based Applications 

      Abisheva, Gulsipa; Goranin, Nikolaj; Razakhova, Bibigul; Aidynov, Tolegen; Satybaldina, Dina (Sensors, 2024)
      This paper presents the methodology and outcomes of creating the Rail Vista dataset, designed for detecting defects on railway tracks using machine and deep learning techniques. The dataset comprises 200,000 high-resolution images categorized into 19 distinct classes covering various railway infrastructure defects. The data collection involved a meticulous process including ...
      2026-03-30

    • Solitary wave solutions for the nonlinear Schrodinger equation with power law nonlinearity 

      Kudaibergenov, Gaziz; Syzdykova, Arailym (Journal of Physics: Conference Series, 2025)
      In this paper, the nonlinear Schr¨odinger equation with power law nonlinearity is considered. This equation admits Lax pair and is integrable. The Jacobi elliptic function approach is used to obtain solitary waves solutions. This method is applied to get the exact solutions for various nonlinear equations. 2D and 3D plots of the obtained solutions are presented. It is ...
      2026-03-30

    • Social networks in the context of postmodern theories – A case of Kazakhstan 

      Sabyrov, Nurlan; Otar, Elmira (Scientific Herald of Uzhhorod University Series “Physics”, 2024)
      Relevance. Social networks are developed and spread to an increasing number of people every day. This is due to the dynamic process of digitalization, which provokes changes in all vectors and categories of society. Purpose. The purpose of the work was to determine the role of the blogger and social networks in the process of shaping and demonstrating the lifestyle that a ...
      2026-03-30

    • Simulation of resonant reactions in TTIK approach by C++ code 

      Akhat, R.; Nauruzbayev, D.; Nurmukhanbetova, A. (International Journal of Mathematics and Physics, 2024)
      We studied the interaction of ¹⁵N with hydrogen at low energies using the Thick Target Inverse Kinematics (TTIK) method combined with the Time of Flight (ToF) technique. This combination enables a clear identification of different light recoil particles without compromising energy resolution in the extended gas target. The use of a gas target ensures minimal background and allows ...
      2026-03-30

    • SIMULATION OF CONDITIONS FOR ACHIEVING HIGH ELECTRICAL POWER AND EFFICIENCY IN A STIRLING ENGINE WITH A FREE WORKING PISTON 

      Sabdenov, K. О.; Erzada, M.; Zholdybaeva, G.T. (Eurasian Physical Technical Journal, 2024)
      A simulation of the Stirling engine was carried out, where the temperature variability in the cooler and heater is taken into account, and the engine itself generates electric current. The study was carried out in the temperature range when the piston and displacer move synchronously. The possibility of increasing engine power by reducing hydraulic resistance in the regenerator ...
      2026-03-30

    • Signature flips in time-varying Λ(t) cosmological models with observational data 

      Myrzakulov, Yerlan; Koussour, M.; Karimov, M.; Rayimbaev, J. (European Physical Journal C, 2024)
      In this study, we investigate signature flips within the framework of cosmological models featuring a time-varying vacuum energy term Λ(t). Specifically, we consider the power-law form of Λ=αHn, where α and n are constants. To constrain the model parameters, we use the MCMC technique, allowing for effective exploration of the model’s parameters. We apply this approach to analyze ...
      2026-03-30

    • Search for Leptonic Decays of Dark Photons at NA62 

      Cortina Gil, E.; NA62 Collaboration (Physical Review Letters, 2024)
      The NA62 experiment at CERN, configured in beam-dump mode, has searched for dark photon decays in flight to electron-positron pairs using a sample of 1.4×1017 protons on dump collected in 2021. No evidence for a dark photon signal is observed. The combined result for dark photon searches in lepton-antilepton final states is presented and a region of the parameter space is excluded ...
      2026-03-30

    • Scalar induced gravity waves from ultra slow-roll galileon inflation 

      Choudhury, Sayantan; Karde, Ahaskar; Panda, Sudhakar; Sami, M. (Nuclear Physics, Section B, 2024)
      We consider the production of secondary gravity waves in Galileon inflation with an ultra-slow roll (USR) phase and show that the spectrum of scalar-induced gravitational waves (SIGWs) in this case is consistent with the recent NANOGrav 15-year data and with sensitivities of other ground and space-based missions, LISA, BBO, DECIGO, CE, ET, HLVK (consists of aLIGO, aVirgo, and ...
      2026-03-30

    • Revisiting Einstein-Gauss-Bonnet theories after GW170817 

      Oikonomou, V.K. (Physics Letters B, 2024)
      In this work we study the inflationary framework of Einstein-Gauss-Bonnet theories which produce a primordial gravitational wave speed that respects the constraint imposed by the GW170817 event, namely |cT 2−1|<6×10−15 in natural units. For these theories in general, the scalar Gauss-Bonnet coupling function ξ(ϕ) is arbitrary and unrelated to the scalar potential. We develop the ...
      2026-03-30

    • Research of Physical and Mechanical Properties of Self-Compacting Concrete Based on Polyfractional Binder 

      Begentayev, Meiram M.; Akhmetov, Daniyar A.; Lukpanov, Rauan E.; Kuldeyev, Erzhan I.; Zhumadilova, Zhanar O.; Myrzaliyev, Tolebi; Dyussembinov, Duman S.; Tolegenova, Aigerim K. (Applied Sciences, 2025)
      This article presents the results of a study on the influence of a three-level dispersed composition of the clinker component of a binder, which includes coarse, medium, and fine fractions, on the physical and mechanical properties of self-compacting concrete (SCC). One of the current challenges in SCC technology is enhancing its durability and resistance to aggressive ...
      2026-03-30