Iran University of Science and Technology

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...

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...

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...

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...

Aligning centralized admissions with industry needs: A systemic structural model of major choice and graduate employability

Centralized, exam-driven admissions can distort field-of-study choices and widen skill mismatches at the university–industry interface. Using Iran as an illustrative case with transferability to other centralized systems, we build an expert-informed structural model linking natio...

Densification by ultrasonics

High-performance densification of powder materials has long been a challenging issue in many critical applications. The presence of two weaknesses, namely not reaching a density close to 100% and the presence of porosity in parts produced by powder metallurgy, can significantly a...

Thermal Aging and Geometry-Driven Changes in Strength of 3D-Printed Polymers

The benefits of additive manufacturing (AM, i.e., 3D printing) have made it one of the most widely used and favored production techniques across a variety of industries. In the current study, the influence of geometry and thermal aging on the mechanical strength of AMed parts has...

Sliding-mode fracture behavior of friction lap-welded aluminum-GFRP hybrid joints utilizing a thermoplastic interlayer

The Mode-II fracture response of friction lap-welded aluminum-to-thermoset glass fiber reinforced polymer (GFRP) composite joints, incorporating an interlayer made of thermoplastic material, was investigated through an integrated experimental and numerical approach. End-notched f...

The implementation of wide angle and UWB retrodirective linear Van Atta array

This paper presents the design, fabrication, and experimental validation of a broadband 1×16 Van Atta reflector array based on compact antipodal Vivaldi antennas. The proposed structure achieves wide azimuthal coverage in addition to ultra-wideband operation, ensuring stable retr...

Yield-aware generative inverse design of anti-reflection coatings via optimal-transport flow matching with a conditional-value-at-risk objective

Abstract Robustness to deposition error is conventionally treated as a post-hoc Monte-Carlo check in multilayer anti-reflection (AR) coating design: a nominally optimal stack is found first, and its manufacturing tolerance is assessed afterwards. We move robustness directly into...

Enhancing green supply chain adoption through digitalisation, risk management, and blockchain integration

This study examines how supply chain digitalization, supply chain disruption, risk management, and blockchain technology influence green supply chain adoption. Based on Dynamic Capability Theory, an integrated framework is developed to investigate the direct effects of digitaliza...

A novel data-driven framework for CNC machine maintenance: integrating deep learning and risk-based prioritization

In advanced industrial environments, predictive maintenance driven by multi-sensor data and intelligent modeling within the Industrial Internet of Things has become a pivotal strategy for mitigating unexpected failures and enhancing the operational efficiency of computer numerica...

Effects of cooling rate on the biocorrosion, microstructure and mechanical properties of biomedical Mg-2Zn-0.5Sr-0.3Ca alloy

Abstract Effects of cooling rate on microstructure, biocorrosion behavior and mechanical properties of Mg-2Zn-0.5Sr-0.3Ca alloy prepared by water-cooling copper mold casting (material I) and steel mold casting (material II) were investigated by microstructure analysis, tensile st...

Explainable ensemble machine learning for dissolved oxygen prediction in a reservoir using SHAP and chord diagram analysis

Dissolved oxygen (DO) is a key indicator of reservoir water quality and ecosystem integrity. The dynamics of DO are governed by complex physical, chemical, and biological reactions such as thermal stratification, nutrient interactions, photosynthesis, respiration, and microbial d...