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  • Open Access

    ARTICLE

    Spatio-Temporal Graph Neural Networks with Elastic-Band Transform for Solar Radiation Prediction

    Guebin Choi*

    CMES-Computer Modeling in Engineering & Sciences, Vol.146, No.1, 2026, DOI:10.32604/cmes.2025.073985 - 29 January 2026

    Abstract This study proposes a novel forecasting framework that simultaneously captures the strong periodicity and irregular meteorological fluctuations inherent in solar radiation time series. Existing approaches typically define inter-regional correlations using either simple correlation coefficients or distance-based measures when applying spatio-temporal graph neural networks (STGNNs). However, such definitions are prone to generating spurious correlations due to the dominance of periodic structures. To address this limitation, we adopt the Elastic-Band Transform (EBT) to decompose solar radiation into periodic and amplitude-modulated components, which are then modeled independently with separate graph neural networks. The periodic component, characterized by strong More >

  • Open Access

    ARTICLE

    Novel Analysis of SiO2 + ZnO + MWCNT-Ternary Hybrid Nanofluid Flow in Electromagnetic Squeezing Systems

    Muhammad Hamzah1, Muhammad Ramzan2,*, Abdulrahman A. Almehizia3, Ibrahim Mahariq4,5,6,7,8,*, Laila A. Al-Essa9, Ahmed S. Hassan10

    CMES-Computer Modeling in Engineering & Sciences, Vol.146, No.1, 2026, DOI:10.32604/cmes.2025.070435 - 29 January 2026

    Abstract The present investigation inspects the unsteady, incompressible MHD-induced flow of a ternary hybrid nanofluid made of SiO2 (silicon dioxide), ZnO (zinc oxide), and MWCNT (multi-walled carbon nanotubes) suspended in a water-ethylene glycol base fluid between two perforated squeezing Riga plates. This problem is important because it helps us understand the complicated connections between magnetic fields, nanofluid dynamics, and heat transport, all of which are critical for designing thermal management systems. These findings are especially useful for improving the design of innovative cooling technologies in electronics, energy systems, and healthcare applications. No prior study has… More >

  • Open Access

    ARTICLE

    Semi Analytical Solution of MHD and Heat Transfer of Couple Stress Fluid over a Stretching Sheet with Radiation in Porous Medium

    Sara I. Abdelsalam1,2,*, M. Khairy3, W. Abbas3, Ahmed M. Megahed4, M. S. Emam5

    Frontiers in Heat and Mass Transfer, Vol.23, No.6, pp. 1833-1846, 2025, DOI:10.32604/fhmt.2025.069711 - 31 December 2025

    Abstract This comprehensive research examines the dynamics of magnetohydrodynamic (MHD) flow and heat transfer within a couple stress fluid. The investigation specifically focuses on the fluid’s behavior over a vertical stretching sheet embedded within a porous medium, providing valuable insights into the complex interactions between fluid mechanics, thermal transport, and magnetic fields. This study accounts for the significant impact of heat generation and thermal radiation, crucial factors for enhancing heat transfer efficiency in various industrial and technological contexts. The research employs mathematical techniques to simplify complex partial differential equations (PDEs) governing fluid flow and heat transfer.… More >

  • Open Access

    ARTICLE

    A Numerical Study of the Double Diffusivity with Convective and Radiative Turbulent Flow in a Greenhouse with Humidity Sources

    J. Serrano-Arellano1, M.I. Hernández-López1, J. L. Chávez-Servín2, E. V. Macias-Melo3, K. M. Aguilar-Castro3,*

    Frontiers in Heat and Mass Transfer, Vol.23, No.6, pp. 1741-1765, 2025, DOI:10.32604/fhmt.2025.069560 - 31 December 2025

    Abstract A numerical study analyzed double diffusion caused by convective and radiative heat transfer in a greenhouse with and without internal humidity sources. Two cases were examined: one considering temperature and mass concentration gradients on vertical walls and another incorporating internal humidity sources, enhancing convective and diffusive flows. Four configurations were analyzed by varying the length of the greenhouse, and the Rayleigh number was calculated over a range from 2.29 × 1010 to 6.07 × 1012. Simulations modeled the greenhouse interior six times a day (8:00 a.m. to 7:00 p.m.), accounting for external temperature, humidity, and solar More > Graphic Abstract

    A Numerical Study of the Double Diffusivity with Convective and Radiative Turbulent Flow in a Greenhouse with Humidity Sources

  • Open Access

    ARTICLE

    Double Diffusion Convection in Sisko Nanofluids with Thermal Radiation and Electroosmotic Effects: A Morlet-Wavelet Neural Network Approach

    Arshad Riaz1,*, Misbah Ilyas1, Muhammad Naeem Aslam2, Safia Akram3, Sami Ullah Khan4, Ghaliah Alhamzi5

    CMES-Computer Modeling in Engineering & Sciences, Vol.145, No.3, pp. 3481-3509, 2025, DOI:10.32604/cmes.2025.072513 - 23 December 2025

    Abstract Peristaltic transport of non-Newtonian nanofluids with double diffusion is essential to biological engineering, microfluidics, and manufacturing processes. The authors tackle the key problem of Sisko nanofluids under double diffusion convection with thermal radiations and electroosmotic effects. The study proposes a solution approach by using Morlet-Wavelet Neural Networks that can effectively solve this complex problem by their superior ability in the capture of nonlinear dynamics. These convergence analyses were calculated across fifty independent runs. Theil’s Inequality Coefficient and the Mean Squared Error values range from 10−7 to 10−5 and 10−7 to 10−10, respectively. These values showed the proposed More >

  • Open Access

    ARTICLE

    Simulated radiation shielding parameter for energy 1 keV-100 GeV of lead-free borotellurite based glass for nuclear medicine application

    N. F. Rozia, L. Hasnimulyatia, A. Azuraidab,*

    Chalcogenide Letters, Vol.22, No.1, pp. 57-76, 2025, DOI:10.15251/CL.2025.221.57

    Abstract This paper studies on the theoretical ionizing radiation shielding parameter for the glass of {[(TeO2)0.7 (B2O3)0.3]0.7 [ZnO]0.3}1-x {CeO2}x by using two software; WinXCOM and PhyX software, which investigate the ability of cerium oxide. The investigation revealed that the 5CeZBTe glass sample, which included the greatest concentration of CeO2 (0.05 mol), showed the greatest linear attenuation coefficient (LAC) and least values in Half Value Layer (HVL) and Mean Free Path (MFP). These results suggest that 5CeZBTe glass has significant potential as an alternative to traditional lead-based radiation shielding, offering a safer environment for both patients and healthcare professionals in More >

  • Open Access

    ARTICLE

    Influence of neodymium doping on radiation shielding properties of yttrium lead borotellurite glass system

    M. R. S. Nasuhaa,*, H. Azhanb,c, L. Hasnimulyatic, W. A. W. Razalic, Y. Norihanc

    Chalcogenide Letters, Vol.22, No.1, pp. 23-31, 2025, DOI:10.15251/CL.2025.221.23

    Abstract The need for effective shielding materials has grown as radiation-based technologies have been more widely used. Glasses doped with rare earth elements like neodymium oxide, are promising candidates due to their enhanced radiation attenuation properties. Using Phy-X software, this research examines how neodymium oxide doping affects the shielding properties of yttrium lead borotellurite glass. X-ray diffraction confirmed the amorphous structure, while density measurements showed increased density with neodymium oxide addition. The Phy-X software calculated radiation shielding parameters for gamma energies from 10⁻³ to 10 MeV. The results demonstrate that neodymium oxide improves gamma irradiation attenuation and More >

  • Open Access

    ARTICLE

    Gamma radiation dose's impact on the energy states and structural properties of Se70Ge20Sb10 alloy

    J. H. Azzawia, Yaseen A. Al-Zahraab, M. A. Abdulmajeedc, K. A. Jasimc, A. Muravitskayae, A. A. Al-Hamadanid,e, A. H. Al-Dulaimid,e

    Chalcogenide Letters, Vol.22, No.7, pp. 593-601, 2025, DOI:10.15251/CL.2025.227.593

    Abstract Four Se70Ge20Sb10 alloy samples were prepared using the melt quenching technique. To improve the energy states of the mobility gap, the samples were exposed to gamma radiation from 60Co source at various doses of 600, 1200, 1500, and 2000 Gy. The electrical characteristics were examined both before and after irradiation. The conductivity analysis revealed that all of our samples were impacted by gamma radiation. The reorganization of the amorphous lattice and the degree of radiation-induced disorder have been involved in the changes that occurred in the electrical characteristics of the irradiated samples. All irradiated and non-irradiated… More >

  • Open Access

    ARTICLE

    Development of AgCuS nanostructures with optimized photocatalytic efficiency under solar irradiation

    S. Younus, N. Amin*, A. Ali, K. Mahmood

    Chalcogenide Letters, Vol.22, No.10, pp. 905-915, 2025, DOI:10.15251/CL.2025.2210.905

    Abstract Wastewater generated by the textile industry contains high levels of various pollutants. Advanced conventional methods, such as chemical and electrical treatments, are effective in addressing these contaminants. However, the significant operational and capital costs associated with these conventional systems limit their accessibility for industrial stakeholders. In contrast, more economically viable methods tend to be less efficient. This study aims to identify a suitable approach for integrating photocatalytic degradation (PCD) with a low-cost method to enhance the cost-effectiveness of wastewater treatment processes in the textile sector. The study utilized silver copper sulfide (AgCuS) nanocomposites as a… More >

  • Open Access

    ARTICLE

    Melatonin Enhances Antioxidant Defense and Physiological Stability in Grapevine (Vitis vinifera L.) Cultivars ‘Merlot’ and ‘Erciş’ under UV-B Stress

    Sena Yıldız1, Nurhan Keskin2,*, Birhan Kunter3, Harlene Hatterman-Valenti4, Ozkan Kaya4,5,*

    Phyton-International Journal of Experimental Botany, Vol.94, No.11, pp. 3471-3492, 2025, DOI:10.32604/phyton.2025.073180 - 01 December 2025

    Abstract Climate change-driven environmental stresses, particularly ultraviolet-B (UV-B) radiation, pose severe threats to grapevine (Vitis vinifera L.) productivity and physiological stability. This study investigated the protective role of melatonin in in vitro plantlets of two grapevine cultivars, ‘Merlot’ and ‘Erciş’, subjected to low (≈8.25 μW cm−2, 16 h) and high (≈33 μW cm−2, 4 h) UV-B exposure. Significant cultivar-specific responses were observed (p < 0.001). The ‘Erciş’ cultivar exhibited higher oxidative stress, with malondialdehyde (MDA) levels reaching 24.30 mmol g−1 FW in control plants compared with 14.91 ± 0.25 mmol g−1 FW in ‘Merlot’. Melatonin provided dose-dependent mitigation, reducing MDA to… More >

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