Iran University of Science and Technology

CoFeNiCuMn layered double hydroxide as a bifunctional electrocatalyst for rechargeable zinc-air batteries

In this work, the CoFe, CoFeNi, CoFeNiMn, CoFeNiCu, and CoFeNiCuMn layered double hydroxides (LDHs) were synthesized by a hydrothermal method for catalyzing the oxygen evolution (OER) and oxygen reduction (ORR) reactions. According to X-ray diffraction and X-ray photoelectron spe...

Numerical investigation of fuel droplets burning in a wave rotor combustor

To numerically investigate the impacts of n-heptane droplets size on a wave rotor combustor operation, unsteady two-phase reacting compressible flow simulations is performed using an in-house code. The results confirm that using fine liquid fuel droplets smaller than about 6 μm,...

Bridging the green gap through understanding the role of perceived risks in sustainable consumption decisions

Despite growing environmental awareness and positive attitudes toward green products, a significant gap persists between consumers’ intentions and their actual sustainable purchase behavior. This study investigates how perceived risks contribute to this “green gap” by identifying...

A generalized Z-number approach to solvability, best approximation, and Ulam–Hyers–Rassias stability of Ψ-Hilfer fractional differential equations

This paper investigates the solvability, best approximation, and Ulam–Hyers–Rassias stability of a class of Ψ-Hilfer fractional Hammerstein integro-differential equations in a generalized Z-number setting. The generalized Z-number framework is used to describe uncertainty togethe...

An artificial intelligence-based two-stage framework for dynamic pricing and demand-side management in smart grids

Rapid urbanization, the rapid growth of electricity demand, and the widespread adoption of electric vehicles have increased the complexity of managing modern power systems. Conventional fixed pricing mechanisms are increasingly insufficient to ensure efficient energy utilization,...

A dual-channel micro-combustor with isolated catalytic hydrogen combustion for efficient ammonia/hydrogen utilization

To overcome the storage and safety challenges associated with hydrogen, ammonia has emerged as a practical carbon-free fuel for power systems. However, its sluggish kinetics and low reactivity hinder stable and efficient combustion. Although catalytic hydrogen combustion can effe...

Synergistic Ion-Bridging and Disjoining Pressure in Smart Brine EOR: A Hybrid Molecular Dynamics and Machine Learning Approach

Abstract The synergistic integration of nanotechnology and “smart brine” chemistry represents a complex Frontier for enhanced oil recovery (EOR), where the coupling between ion-bridging kinetics and macroscopic displacement remains a subject of rigorous investigation. This study...

Photodeposited Ag–Pd on PMo12/g-C3N4, a Ternary Nanocomposite for Photocatalytic H2 Production

Abstract A ternary Ag–Pd/PMo12/g-C3N4 photocatalyst for visible-light-driven formic acid dehydrogenation was synthesized via a photodeposition strategy that eliminates the need for external chemical reductants such as NaBH4 or hydrazine. In this approach, Keggin-type PMo12 specie...

Acoustic performance of Shekam-Darideh spatial typology in traditional Iranian houses: Evidence from the Tabatabaei house

Contemporary studies in architecture and urban planning, especially in the field of cultural heritage and historical monuments, show that spatial perception is not limited to visual characteristics and that other components, such as sound, play an important role in the quality of...

Fabrication and performance assessment of a new dry in-ear EEG sensor for brain monitoring

Bioelectrodes are commonly utilized for sensing electrical signals from the electrochemical activity of excitable cells, recording ionic currents from the body, and translating them into detectable electrical signals. Conventional scalp EEG electrodes, nonetheless, are subject to...

A system dynamics approach to sustainable monetization in digital platforms: balancing advertising and user retention in mobile gaming

Abstract The rapid growth of digital platforms, particularly in mobile gaming, has created a fundamental business dilemma: how to balance advertising-based monetization with the preservation of long-term user engagement. This study employs a system dynamics simulation, calibrated...

Mesoporous silica nanoparticles as an advanced tool for cancer therapy

Mesoporous silica nanoparticles (MSNs) are becoming popular for targeted drug delivery because their pore structure can be changed, they have a large surface area, and their surface can be easily modified. This review critically assesses recent advancements in MSN-based drug deli...

Existence and uniqueness results for a new class of coupled Urysohn–Hammerstein-type Ψ-Katugampola fractional integral equations

In this paper, we study a new class of coupled nonlinear fractional integral equations involving the Ψ-Katugampola fractional integral operator. By applying Dhage’s fixed point theorem in a Banach algebra, we establish sufficient conditions for the existence of solutions to the p...

Weak Solutions and Uniqueness Results for Sequential q‐Fractional Pantograph Equations Under Weak Topology

ABSTRACT The purpose of this paper is to investigate the existence and uniqueness of weak solutions for a nonlinear sequential quantum Liouville–Caputo fractional differential equation subject to a nonlocal initial condition, where the initial value is defined through a continuou...

A single passive terahertz metasurface implementing eight Boolean logic gates through polarization multiplexing

Optical logic gates promise computing at the speed of the carrier wave, and metasurfaces provide their most compact platform; yet the gate count on one aperture has grown only by adding diffractive layers, active materials, or coherently controlled input beams. Here we demonstrat...

Gap-engineered four-spiral terahertz metamaterial absorber for ratio-based self-referenced refractive-index sensing

A gap-engineered four-spiral terahertz (THz) metamaterial absorber is proposed for multi-mode, self-referenced refractive-index sensing using a normalized ratio-based readout. The unit cell consists of four square-spiral Au resonators arranged in a 2 × 2 configuration on a low-lo...

Loewner Extrema and Rank-One Certification Gaps for Cumulative-Tail Matrix Response Bodies

We give an exact spectral classification in every finite real matrix dimension for thecompact response body En(S) = {G[K] : K ∈ An(S)}. It has least and greatestelements in Loewner order if and only if S has at most one distinct eigenvalue in(aℓ, bℓ). On exactly these spectral st...

Engineering chitosan functionalized extracellular vesicles for targeted brain gene delivery and neurotherapeutics

Gene therapy represents a crucial frontier in modern medicine for brain diseases; however, a significant obstacle hinders its progress. The immense difficulty of therapeutic molecules that deliver to the brain should be in a safe and effective way. The challenge is that blood bra...

Occlusion Chatterbox: an origami-inspired robotic device for enhancing dental occlusion training

Occlusal morphology is a fundamental component of dental education and is essential for restorative, prosthodontic, and orthodontic procedures. However, traditional teaching methods—such as wax carving, plastic tooth models, and two-dimensional illustrations—often fail to provide...

Biomass pyrolysis process simulation for design and assessment: A critical, decision-oriented review of aspen plus workflows and complementary tools

Biomass-pyrolysis process models increasingly support flowsheet design, heat integration, optimization, and techno-economic or environmental assessments. However, the reliability of their conclusions depends on whether feedstock heterogeneity, conversion behavior, condensable pro...