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Gravitational Collapse and Particle Production on FLRW Spherically Symmetric Metric

We discuss the gravitational collapse of a spherically symmetric massive core in which the fluid component is suffering the influence of particle creation due to the temporal evolution of the system's gravity. The influence of the creation rate in the collapsing core is quantifie...

Color as a gate to verification: Super-additive costs in oculomotor disengagement

Visual search theories distinguish between attentional capture and disengagement, yet how multiple feature dimensions combine to delay disengagement remains unclear. This study investigated whether shared features (color, shape, object category) produce additive or super-additive...

Green Ferrite-Based Nanocomposites: Emerging Multifunctional Materials for Sustainable Wastewater Treatment and Environmental Remediation

In the era of scarcity of potable water, there is need of immediate attention for sustainable treatment of wastewater. Water has such a strong tendency to dissolve other substances and that's why sometimes referred to as the universal solvent. Significant impact of water pollutio...

A crossing theorem for CMB-distance-transparent dark-energy deformations

Cosmological distances constrain dark-energy evolution through weighted integrals of the expansion history. This paper isolates a sign-change consequence for deformations around a flat [Formula: see text]CDM background. Let [Formula: see text], with [Formula: see text] continuous...

Adaptive Stabilized Finite Element Modeling of Advection-Dominated Air Pollution Plumes

Accurate simulation of convection-dominated pollutant transport remains a significant challenge due to the presence of steep concentration gradients and the numerical instabilities associated with standard finite element discretizations. This study presents an adaptive Streamline...

A Multi-Source Human Resource Data Mining and Enterprise Dynamic Performance Management Framework Based on Hybrid Fuzzy-Bayesian Simulation

This study addresses the heterogeneity of multi-source human resource data, the ambiguity of subjective evaluations, the time-varying nature of performance states, and the difficulty of translating predictions into management interventions. A hybrid fuzzy-dynamic Bayesian perform...

Variance Polygenic Scores (vPGS) as a Tool for Studying Gene-Environment Interactions Associated With Refractive Error

Abstract Purpose Conventional polygenic scores predict an individual’s phenotype based on their genetics. By contrast, variance polygenic scores (vPGS) quantify genetic predisposition to phenotypic variance. We tested the hypothesis that a vPGS for refractive error can identify i...

When Clear Water Brings Trust: Water Ecological Civilization Pilots and Corporate Environmental Information Disclosure in China

Can ecological civilization pilots improve corporate environmental transparency? This study examines this question using the staggered implementation of China's Water Ecological Civilization Pilot Cities (WECPC) program as a policy shock. Based on A-share listed firms from 2008 t...

Energy Markets and Macroeconomic Tail Risks: A Mixed-Frequency Quantile VAR Connectedness Approach

Against the backdrop of rising uncertainty in global energy markets, the tail directional connectedness between energy-price fluctuations and macroeconomic conditions has become an important issue for macroprudential monitoring. Drawing on the mixed-frequency information stacking...

Failure behavior of star-shaped zero Poisson's ratio honeycomb core with aluminum face-sheet sandwich beams under three-point bending

The failure behavior and energy absorption performance of star-shaped zero Poisson’s ratio honeycomb core with aluminum face-sheet sandwich beams under three-point bending are experimentally and numerically studied. A numerical model that accounts for the nonlinear mechanical beh...

Black–Hole Echo Resonance Spectra and Source Dependence in a Controlled Transfer–Function Model

Echo models phenomenologically encode possible near–horizon structure by replacing the purely ingoing horizon–side condition with an effective reflecting inner boundary near the would–be horizon. We study this idea in a controlled transfer–function model consisting of a compactly...

On Tensor Product Semirings

In this paper we study tensor product semirings of the form [Formula: see text], where [Formula: see text] are [Formula: see text]-semimodules for a semiring [Formula: see text] and [Formula: see text] is a bilinear map. We establish connections between tensor product semirings a...

Closed Discrete Bases in Countable-Dimensional Topological Vector Spaces

Let K be either a complete nondiscrete second-countable valued field (e.g., [Formula: see text] or [Formula: see text]) or a finite field. It is proved that any countable-dimensional topological vector space over K has a closed discrete basis.

On a ψ-Hilfer fractional p -Laplacian differential equation: Existence and multiplicity results

In this paper, we investigate the existence and multiplicity of weak solutions for a class of nonlinear boundary value problems driven by a [Formula: see text]-Hilfer fractional p-Laplacian operator. By introducing an appropriate fractional derivative Banach space, we establish a...

Dynamic Modeling and Performance Analysis of Complex Nonlinear Piezoelectric Energy Harvesting Systems based on Timoshenko Beam Theory

This paper establishes a coupled, electromechanical nonlinear model with formulation for a complex piezoelectric energy harvester using Hamilton’s principle based on both Timoshenko and Euler-Bernoulli beam theories. The coupled nonlinear governing equations are derived and it in...

Lower bounds for levels of complexes by resolution dimensions

Let [Formula: see text] be an abelian category. Denote by [Formula: see text] the bounded derived category of [Formula: see text]. In this paper, we investigate the lower bounds for the levels of objects in [Formula: see text] with respect to a (co)resolving subcategory satisfyin...

Point-wise outward equitable domination

External and internal equitability studied with the properties of either the components or the set itself. In this paper, the equitability is imposed on the individual vertices and their dominating vertices. A subset [Formula: see text] of [Formula: see text] is called a Point wi...

A Stabilized Linear Tetrahedral Finite Element with Face-Based Strain Reconstruction Kinematics for Nearly Incompressible Finite-Strain Hyperelasticity

Linear tetrahedral elements for nearly incompressible finite-strain hyperelasticity are often affected by volumetric locking and exhibit oscillatory stress/pressure fields. We propose a stabilized linear tetrahedral u-θ element combining mixed VMS stabilization with face-based st...

A Distributed Observer Approach to the Bipartite Output Regulation of Nonlinear Multi-Agent Systems over Signed Networks

This paper investigates the bipartite output regulation problem (BORP) of nonlinear multi-agent systems (MASs) over static signed networks. Unlike conventional cooperative output regulation problem (CORP), antagonistic couplings among agents result in a bipartite tracking objecti...

Modeling Melt Pool Flow in Laser Powder Bed Fusion with a Modified TENO-SPH Method

Laser Powder Bed Fusion (LPBF) is a pivotal additive manufacturing technology whose final quality is determined by the complex interplay of process parameters such as laser power and scanning speed. Relying solely on physical experimentation to control internal defects (e.g., por...