Asthma remains a major health challenge affecting over 300 million people worldwide, with severe, steroid-resistant phenotypes affecting 5–10
Tourism accounts for roughly 10% of global greenhouse-gas emissions and is projected to increase substantially by 2030 without decisive action. In response, this study investigates how travelers' eco-social receptivity on social media can transform them into climate advocates (termed tourism brand e-vocacy). We address a critical knowledge gap by examining the emotional and cognitive mechanisms linking receptivity to e-vocacy, and the conditions under which these processes are strengthened. A multi-city survey (n = 427) of leisure travelers in five major Chinese tourism hubs was conducted to test a stimulus-organism-response model. Results reveal that eco-social receptivity drives tourism brand e-vocacy predominantly through a "warm-glow" emotional route (tourist green happiness) and secondarily via a cognitive route (eco-brand trust). Next-generation smart travel intelligence usage significantly amplifies both the affective and cognitive mediation pathways, whereas high perceived authenticity of social-action advertising intensifies only the affective path. Notably, the moderated mediation via eco-brand trust was non-significant. By extending the S-O-R framework into an AI-augmented, socially conscious tourism context, this research offers novel insights for sustainable travel marketing. The findings suggest that emotionally resonant, credible eco-initiatives on social platforms can convert receptive tourists into proactive online advocates, supporting global climate-action goals.
The influence of three distinct shape functions on the physical properties of anisotropic wormholes (WHs) with a global monopole charge (GMC) is investigated in the background of minimally coupled modified gravity. The essential geometric criteria for traversability are assessed by confirming the throat condition and the flareout requirement. The GMC parameter’s effect on the WH throat and surrounding curvature is visualized through 2D and 3D embedding diagrams which reveal that larger monopole values yield wider throats and smoother spatial curvature. To examine the feasibility of such WH models, we solve the modified field equations and analyze the classical energy conditions with relativistic corrections. Our analysis shows that the anisotropy parameter remains positive in all three cases, indicating a repulsive geometry, while this anisotropic repulsion counteracts gravitational collapse and supports the throat’s stability. Additionally, the volume integral quantifier estimates the total exotic matter (EM), demonstrating that only negligible amounts are necessary to maintain traversable geometries due to modified gravitational insights.
This research aims to analyze the influence of f(Q, Lm, T) gravity on the structure of compact stellar objects with anisotropic matter configuration, where Q denotes non-metricity, Lm is the matter Lagrangian, and T is the trace of the energy-momentum tensor. For this analysis, we consider physically reasonable, non-singular solutions describing static, spherically symmetric structures. To manage the complexity of the field equations, we choose a specific model of the theory, enabling the derivation of explicit formulas for energy density and pressure, which are used to explore the physical behavior inside the compact objects. To ensure physical viability, we examine the equilibrium and stability of the compact star using the Tolman-Oppenheimer-Volkoff equation and sound speed analysis. Our results confirm that compact objects maintain their physical viability and stability within the framework of f(Q, Lm, T) gravity.
In this study, we uncover the accretion dynamics and oscillatory behavior around rotating black holes within the Einstein-Euler-Heisenberg (EEH) nonlinear electrodynamic framework by analyzing both the motion of test particles and numerically solving the general relativistic hydrodynamic equations. Using EEH geometry, we compute the structure of circular motion, the effective potential, and we evaluate the orbital, radial, and vertical epicyclic frequencies together with the Lense-Thirring and periastron precession rates. Our calculations show that, compared to the Kerr model, the charge parameter Q and the spin parameter a significantly modify the strong gravitational field and shift the characteristic frequencies. We then model the dynamical structure formed by matter accreting toward the EEH black hole through the BHL mechanism, finding that the parameter Q increases the amount of infalling matter and strengthens shock-cone instabilities near the horizon, while farther from the black hole it suppresses accretion and reduces turbulence. Time-series analysis of the accretion rate reveals robust quasi-periodic oscillations (QPOs), whose low-frequency components arise from the precession of the shock cone, while high-frequency components appear as a consequence of strong-field instabilities modified by Q and a. A systematic parameter-space exploration identifies the regions where EEH corrections maximize QPOs activity, indicating that nonlinear electrodynamics can leave observable imprints on accretion flows and may be testable with QPOs and horizon-scale observations.
