Marina Ladonkina¹, Viktoriia Podryga^1,*, Yury Poveshchenko¹, Haochen Zhang²

Frontiers in Heat and Mass Transfer, Vol.23, No.6, pp. 1789-1809, 2025, DOI:10.32604/fhmt.2025.066953 - 31 December 2025

Abstract The work presents new methods for selecting adaptive artificial viscosity (AAV) in iterative algorithms of completely conservative difference schemes (CCDS) used to solve gas dynamics equations in Euler variables. These methods allow to effectively suppress oscillations, including in velocity profiles, as well as computational instabilities in modeling gas-dynamic processes described by hyperbolic equations. The methods can be applied both in explicit and implicit (method of separate sweeps) iterative processes in numerical modeling of gas dynamics in the presence of heat and mass transfer, as well as in solving problems of magnetohydrodynamics and computational astrophysics. In… More >

Gengan Wu^1,#, Anqi Jiang^1,#, Zihan Chen², Xinwei Su^3,4,*

Journal of Psychology in Africa, Vol.35, No.6, pp. 853-861, 2025, DOI:10.32604/jpa.2025.073822 - 30 December 2025

Abstract This study examined the role of role clarity and safety cognition in shaping mountain climbers’ participation motivation and safety behavior. The study sample comprised 454 participants (males = 58.8%, mean age = 32 years, SD = 9.31). They completed measures on five participation motivation dimensions (achievement, interest, knowledge, socialization, and health) and safety participation. The results from structural equation modelling indicated that participant motivations in achievement, health, and knowledge significantly predicted safety participation behavior, such as risk avoidance, self-protection, and mutual assistance, more so than the motivations of interest and socialization. Role clarity moderated the More >

Mujahid Islam¹, Fateh Ali^1,*, Xinlong Feng^1,*, M. Zahid², Sana Naz Maqbool¹

CMES-Computer Modeling in Engineering & Sciences, Vol.145, No.3, pp. 3511-3561, 2025, DOI:10.32604/cmes.2025.073678 - 23 December 2025

Abstract Roll coating is a vital industrial process used in printing, packaging, and polymer film production, where maintaining a uniform coating is critical for product quality and efficiency. This work models non-isothermal Carreau fluid flow between a rotating roll and a stationary wall under fixed boundary constraints to evaluate how non-Newtonian and thermal effects influence coating performance. The governing equations are transformed into non-dimensional form and simplified using lubrication approximation theory. Approximate analytical solutions are obtained via the perturbation technique, while numerical results are computed using both the finite difference method and the BVP-Midrich technique. Furthermore, More >

Nada Zaari Jabri¹, Mohamed Ait-El-Mokhtar^1,*, Fadoua Mekkaoui¹, Najwa Rabah¹, Ilham Amghar¹, Ghizlane Diria², Abdelaziz Hmyene¹

Phyton-International Journal of Experimental Botany, Vol.94, No.11, pp. 3687-3701, 2025, DOI:10.32604/phyton.2025.071634 - 01 December 2025

Abstract Cadmium (Cd) contamination is a major environmental stressor that adversely affects crop germination and early development. This study assessed the impact of increasing Cd concentrations (0.125 to 1 g/L) on seed germination and early seedling growth in three bread wheat (Triticum aestivum L.) cultivars: Achtar, Lina, and Snina. The results revealed a clear dose-dependent inhibitory effect of Cd. Germination percentage (GP) significantly declined with increasing Cd levels, while mean germination time was progressively delayed, particularly at higher concentrations. Vigor index (VI) also showed significant reductions, reflecting compromised seedling establishment. Morphological traits, especially shoot and root lengths,… More >

Yang Lei^1,*, Bo Jiang¹, Yucai Zhao², Gaofeng Fu³, Falin Qi¹, Tian Tian¹, Qiankuan Feng¹, Qiming Qu¹

Structural Durability & Health Monitoring, Vol.19, No.6, pp. 1657-1679, 2025, DOI:10.32604/sdhm.2025.069415 - 17 November 2025

Abstract Detecting internal defects, particularly voids behind linings, is critical for ensuring the structural integrity of aging high-speed rail (HSR) tunnel networks. While ground-penetrating radar (GPR) is widely employed, systematic quantification of performance boundaries for air-coupled (A-CGPR) and ground-coupled (G-CGPR) systems within the complex electromagnetic environment of multilayer reinforced HSR tunnels remains limited. This study establishes physics-based quantitative performance limits for A-CGPR and G-CGPR through rigorously validated GPRMax finite-difference time-domain (FDTD) simulations and comprehensive field validation over a 300 m operational HSR tunnel section. Key performance metrics were quantified as functions of: (a) detection distance (A-CGPR:… More >

Sehrish Bibi^1,*, Vincenzo Minutolo², Obaid Ullah Mehmood³, Renato Zona²

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.10, pp. 2473-2493, 2025, DOI:10.32604/fdmp.2025.072470 - 30 October 2025

Abstract Arterial stenosis is a critical condition with increasing prevalence among pediatric patients and young adults, making its investigation highly significant. Despite extensive studies on blood flow dynamics, limited research addresses the combined effects of nanoparticles and arterial curvature on unsteady pulsatile flow through multiple stenoses. This study aims to analyze the influence of nanoparticles on blood flow characteristics in realistic curved arteries with mild to severe overlapped constrictions. Using curvilinear coordinates, the thermal energy and momentum equations for nanoparticle-laden blood were derived, and numerical results were obtained through an explicit finite difference method. Key findings More >

Farzad Mohebbi^*

Frontiers in Heat and Mass Transfer, Vol.23, No.5, pp. 1417-1441, 2025, DOI:10.32604/fhmt.2025.069024 - 31 October 2025

Abstract An inverse analysis is presented to estimate line heat source in two-dimensional steady-state and transient heat transfer problems. A constant heat source is considered in the steady-state heat transfer problem (a parameter estimation problem) and a time-varying heat source is considered in the transient heat transfer problem (a function estimation problem). Since a general irregular 2D heat conducting body is considered, a body-fitted grid generation is used to mesh the domain. Then governing equations and associated boundary and initial conditions are transformed from the physical domain to the computational domain and finite difference method is… More >

Ruiqian Li^1,*, Peibing Zheng¹, Mengxin Yan¹, Xinyi Zhou², Ziyu Wu¹, Yiting Wang¹

Journal of Psychology in Africa, Vol.35, No.5, pp. 681-688, 2025, DOI:10.32604/jpa.2025.069421 - 24 October 2025

Abstract This study examined the relationship between paternal overprotective parenting and problem behaviors of preschool children, and maternal overprotective attitudes and parenting stress mediation of that relationship. Data were collected from 265 families, including parents and preschool children (ages 3–6). The results revealed that paternal overprotective attitudes significantly influenced maternal overprotective attitudes and maternal parenting stress. Maternal overprotective attitudes, in turn, increased maternal parenting stress, exacerbated children’s problem behaviors. Paternal overprotective attitudes indirectly contributed to these behaviors through both maternal overprotective attitudes and parenting stress. The effect was more pronounced on boy than girl younger than More >

Esther López-Bermúdez, María Soledad Palacios-Gálvez, Francisco José García-Moro, Diego Gómez-Baya^*

International Journal of Mental Health Promotion, Vol.27, No.9, pp. 1265-1278, 2025, DOI:10.32604/ijmhp.2025.068013 - 30 September 2025

Abstract Objectives: The climate crisis demands urgent action from all sectors of society, including young people in higher education. While previous research has explored individual and contextual predictors of pro-environmental behaviour (PEB), the contribution of Positive Youth Development (PYD) remains underexplored. This study investigates the relationship between PYD dimensions (Competence, Confidence, Connection, Character, and Caring) and two environmental outcomes: environmental habits and climate change awareness, considering gender differences. Methods: A cross-sectional study was conducted with a sample of 1779 students from 10 universities in Andalusia (Spain). Data were collected through an online survey assessing PYD indicators,… More >

Jingwen Wang, Ming Xu, Deming Nie^*

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.9, pp. 2225-2251, 2025, DOI:10.32604/fdmp.2025.068327 - 30 September 2025

Abstract This study employs the fluctuating-lattice Boltzmann method to investigate temperature-gradient-driven aggregation of microswimmers, specifically, pulling-type (pullers) and pushing-type (pushers), within a fluid confined by two channel walls. The analysis incorporates the Brownian motion of both swimmer types and introduces key dimensionless parameters, including the swimming Reynolds, Prandtl, and Lewis numbers, to characterize the influences of self-propulsion strength, thermal diffusivity, and Brownian diffusivity on aggregation efficiency and behavior. Our findings reveal that pushers tend to aggregate either along the channel centerline or near the channel walls under conditions of thermal gradients imposed by heated or cooled More >