Отображаемые элементы 201-220 из 5785

    • Enhancing the efficacy of humidifier-dehumidifier desalination in humid regions through the use of an absorption refrigeration cycle (an economic and experimental investigation) 

      Abdullaev, Sherzod; Abdullaeva, Barno Sayfutdinovna; Opakhai, Serikzhan; Alzubaidi, Laith H. (International Journal of Thermofluids, 2024)
      This experimental study investigates the performance of a novel humidifier-dehumidifier (HDH) desalination system integrated with a vapor absorption refrigerator (VAR) and photovoltaic (PV) panels for humid regions. The effects of air mass flow rate (m˙ a) and inlet air temperature on key performance indicators were evaluated. Increasing m˙ a from 0.0039 kg/s to 0.0071 kg/s ...
      2026-03-27
    • Energy Transfer of Electronic Excitations by Activators in Phosphates and Sulfates via the Creation of Combined Electron Emission States 

      Nurpeissov, Aibek S.; Alibay, Temirulan T.; Nurakhmetov, Turlybek; Kareiva, Aivaras; Zarkov, Aleksej; Pazylbek, Sapargali (Crystals, 2025)
      In this work, the mechanisms for creating a combined electronic–radiative local state beneath the conduction band, consisting of intrinsic and activator electron–hole states, are experimentally substantiated. In the first part of this work, the mechanisms of the formation of intrinsic and activator electron–hole trapping centers are experimentally demonstrated in all four ...
      2026-03-27
    • Energy conditions in f( Q, Lm) gravity 

      Myrzakulov, Y.; Donmez, O.; Koussour, M.; Muminov, S.; Ostemir, D.; Rayimbaev, J. (The European Physical Journal C, 2025)
      We are experiencing a golden age of experimental cosmology, with exact and accurate observations being used to constrain various gravitational theories like never before. Alongside these advancements, energy conditions play a crucial theoretical role in evaluating and refining new proposals in gravitational physics. We investigate the energy conditions (WEC, NEC, DEC, and ...
      2026-03-27
    • Energy, exergy and thermo-economics analyses of hybrid solar, steam turbine and biomass gasification system for hydrogen production by polymer membrane electrolyzer 

      Kuterbekov, Kairat; Kabyshev, Asset; Bekmyrza, Kenzhebatyr; Kubenova, Marzhan (International Journal of Thermofluids, 2024)
      This study presents an evaluation of the energy exergy and thermo-economics of a hybrid power generation system that simultaneously produces power, heat, and hydrogen using solar and biomass energy. The system employs a polymer membrane electrolyzer for hydrogen production, with heat exchangers utilized to attain the desired water temperature instead of conventional heaters. ...
      2026-03-27
    • Electroweak phase transition in singlet extensions of the standard model with dimension-six operators 

      Oikonomou, V.K.; Giovanakis, Apostolos (Physical Review D, 2024)
      The significance of the electroweak phase transition is undeniable, and although initially it was believed that it was second order, it is now believed that it is a first-order transition. However, it is not a strong first-order phase transition in the context of the standard model, and the remedy to this issue is to use the Higgs portal and directly couple the Higgs to a hidden ...
      2026-03-27
    • Electronic Structure of Mg-, Si-, and Zn-Doped SnO2 Nanowires: Predictions from First Principles 

      Platonenko, Alexander; Piskunov, Sergei; Yang, Thomas C.-K.; Juodkazyte, Jurga; Isakovica, Inta; Popov, Anatoli I.; Junisbekova, Diana; Baimukhanov, Zein; Dauletbekova, Alma (Materials, 2024)
      We investigated the electronic structure of Mg-, Si-, and Zn-doped four-faceted [001]- and [110]-oriented SnO2 nanowires using first-principles calculations based on the linear combination of atomic orbitals (LCAO) method. This approach, employing atomic-centered Gaussian-type functions as a basis set, was combined with hybrid density functional theory (DFT). Our results show ...
      2026-03-27
    • Elastic scattering of deuteron beam on 6 Li nuclei in the context of the cluster model 

      Tursunbayev, Nurbek T.; Baimurzinova, Bota S.; Urazbekov, Bakytzhan A. (Eurasian Journal of Physics and Functional Materials, 2024)
      In the context of the cluster model applied to the nuclear reaction d + 6Li at a laboratory energy of 171 MeV, the nucleus 6Li was examined within the framework of an α + p + n cluster model. The three-body model concept was incorporated into the interaction potential for the d + 6Li system through the construction of a double-folding potential based on the three-body model. The ...
      2026-03-27
    • Einstein–Gauss–Bonnet cosmological theories at reheating and at the end of the inflationary era 

      Oikonomou, V.K.; Tsyba, Pyotr; Razina, Olga (Annals of Physics, 2024)
      In this work we study the GW170817-compatible Einstein-Gauss–Bonnet theories during the reheating and the end of inflationary era. Given the scalar field potential V(ϕ) which can have some intrinsic importance for the theory, determining the scalar coupling function ξ(ϕ) can be cumbersome due to lack of analyticity. The GW170817 observation constrains the scalar coupling function ...
      2026-03-27
    • Effect of Phase Composition Variation of Oxy–Nitride Composite Ceramics on Heat Resistance and Preservation of Strength Parameters 

      Borgekov, Daryn B.; Azambayev, Serik B.; Kozlovskiy, Artem L.; Shlimas, Dmitriy I. (Crystals, 2024)
      The aim of this study is to determine the effect of changes in the phase composition of Al2O3–Si3N4 ceramics that were obtained using the method of mechanochemical solid-phase grinding on their resistance to the process of long-term thermal exposure, accompanied by the processes of oxidation and softening. The relevance of this research consists of determining the influence ...
      2026-03-27
    • Effect of decoupling parameters on maximum allowable mass of anisotropic stellar structure constructed by mass constraint approach in f( Q)-gravity 

      Maurya, S. K.; Aziz, Abdul; Singh, Ksh. Newton; Das, Amit; Myrzakulov, Kairat; Ray, Saibal (The European Physical Journal C, 2024)
      In the present article anisotropic solutions with vanishing complexity in the framework of f (Q) gravity are generated. At first, the field equations in f (Q)-gravity are gravitationally decoupled where the isotropic fluid component corresponds to Vlasenko–Pronin space-time. Then, with a new source, the complete geometric deformation is supplemented to an isotropic component, ...
      2026-03-27
    • Effect of rhodium doping for photocatalytic activity of barium titanate 

      Kaptagay, G.A.; Satanova, B.M.; Abuova, A.U.; Konuhova, M.; Zakiyeva, Zh.Ye.; Tolegen, U. Zh; Koilyk, N.O.; Abuova, F.U. (Optical Materials: X, 2025)
      By means of DFT oxygen evolution reaction on Rh-doped BaTiO3 (001) surface has been modeled. Gibbs free energies for each step of the reaction as well as the values of overpotential have been calculated, taking into account the solvation effect. The position of Rh-induces defect energy levels have been determined. Our findings indicated a substantial reduction in overpotential ...
      2026-03-27
    • Effect of Plasma Quenching Parameters on Hardened Layer Properties in Railroad Wheels 

      Kanayeva, Azamat; Kanayev, Amangeldy; Moldakhmetova, Aliya (Tribology in Industry, 2025)
      This research investigates the effect of quenching current, nozzle-tosurface distance, plasma-forming gas flow rate, and rate of cooling on both plasma torch travel speed (treatment speed) and nozzle diameter. Cooling rates were calculated for various quenching currents based on heat transfer theory. Results show that the relative significance of primary plasma selective ...
      2026-03-27
    • Effect of irradiation temperature on the mobility of structural and vacancy defects in the damaged layer of Li2ZrO3 ceramics 

      Abyshev, Bauyrzhan K.; Giniyatova, Sholpan G.; Kozlovskiy, Artem L. (Optical Materials: X, 2024)
      The paper presents the assessment results of the irradiation temperature effect on the change in the type of structural defects caused by irradiation with helium ions in the near-surface layer of Li2ZrO3 ceramics, as well as determining the nature of structural damage using the electron paramagnetic resonance method in the case of irradiation fluence variation. During ...
      2026-03-27
    • Annealing Effect on Structural, Optical and Electrophysical Properties of ZnSe Nanocrystals Synthesized into SiO2/Si Ion Track Template 

      Akylbekova, Aiman; Dauletbekova, Alma; Baimukhanov, Zein; Vlasukova, Liudmila A.; Usseinov, Abay; Saduova, Nuray; Akilbekov, Abdirash T.; Pankratov, Vladimir A.; Popov, Anatoli I. (Materials, 2024)
      We report the results of synthesis of zinc selenide (ZnSe) nanocrystals into SiO2/Si track templates formed by irradiation with 200 MeV Xe ions up to a fluence of 107 ions/cm2 . Zinc selenide nanocrystals were obtained by chemical deposition from the alkaline aqueous solution. Scanning electron microscopy, X-ray diffractometry, Raman and photoluminescence spectroscopy, and ...
      2026-03-26
    • An Edge-Computing-Based Integrated Framework for Network Traffic Analysis and Intrusion Detection to Enhance Cyber–Physical System Security in Industrial IoT 

      Zhukabayeva, Tamara; Ahmad, Zulfiqar; Adamova, Aigul; Karabayev, Nurdaulet; Abdildayeva, Assel (Sensors, 2025)
      Industrial Internet of things (IIoT) environments need to implement reliable security measures because of the growth in network traffic and overall connectivity. Accordingly, this work provides the architecture of network traffic analysis and the detection of intrusions in a network with the help of edge computing and using machine-learning methods. The study uses k-means and ...
      2026-03-26
    • ANALYSIS OF THE EFFECT OF THE B3Y-FETAL POTENTIAL ON ENERGY NEAR THE COULOMB BARRIER FOR THE 9Ве+12С SYSTEM 

      Soldatkhan, D.; Baratova, A.A. (Eurasian Physical Technical Journal, 2025)
      The experimental data of the elastic scattering process of the 9Ве+12С nuclear system were analyzed from the point of view of microscopic theory in energy near the Coulomb barrier. The new Botswana 3- Yukawa -Fetal potential, created in a variational approach with lower-order constraints on two body matrices, was first used for the 9Ве+12С system as a real part of the optical ...
      2026-03-26
    • Analysis of investments in the expansion of social university infrastructure facilities and student dormitories in Kazakhstan 

      Chikibayeva, Zarina; Shalbolova, Urpash; Mukhanova, Gaini (Scientific Herald of Uzhhorod University Series “Physics”, 2024)
      Relevance. Providing comfortable living conditions for its population is the main purpose of any state. Students are one of the most vulnerable social groups since they are limited in financial opportunities to provide themselves with housing while studying at universities and other educational institutions. Student dormitories are designed to solve this issue and provide ...
      2026-03-26
    • Advanced surface engineering of TZO nanostructures via irradiation technique for enhanced nitric oxide (NO) gas sensitivity 

      Yergaliuly, Gani; Tangirbergen, Abylay; Mentbayeva, Almagul; Amangeldi, Nurlan; Kaikanov, Marat; Acar, Selim; Bakenov, Zhumabay; Soltabayev, Baktiyar (Applied Surface Science Advances, 2025)
      This manuscript investigates the enhancement of gas sensing properties of titanium-doped zinc oxide (TZO) nanostructures using intense pulsed ion beam irradiation (IPIB). TZO nanostructures synthesized using the sequential ion-layer adsorption and reaction (SILAR) method were subjected to two different treatments: thermal annealing at 500 ◦C under nitrogen atmosphere and ...
      2026-03-26
    • Additive Manufacturing as an Alternative to Core Sampling in Concrete Strength Assessment 

      Anop, Darya; Sadenova, Marzhan; Beisekenov, Nail; Rudenko, Olga; Aubakirova, Zulfiya; Jexembayeva, Assel (Applied Sciences, 2025)
      Additive manufacturing reshapes concrete construction, yet routine strength verification of printed elements still depends on destructive core sampling. This study evaluates whether standard 70 mm cubes—corrected by a single factor—can provide an equally reliable measure of in situ compressive strength. Five Portland-cement mixes, with and without ash-slag techno-mineral ...
      2026-03-26