Imam Khomeini International University

A sociological study of the ritual of coffee consumption among Iranian youth: From entering a new field to connoisseurship consumption

This study examines coffee consumption among young people in Tehran as a multilayered sociocultural practice embedded in processes of cultural distinction, identity formation, and urban sociability. Drawing on Bourdieu’s field theory, subcultural capital, serious leisure, and rit...

Correlates of unsafe driving in non-professional drivers: insights from a data-driven modeling approach

Aberrant driving behavior is a major determinant of traffic crashes and injuries. It encompasses deliberate violations, errors, and lapses. Understanding the specific driver characteristics associated with each behavioral domain is critical for improving road safety. This study a...

The Probability of My Existence: A Chain-Rule and Monte Carlo Model of a Family Story

Models a family story as a DAG; derives a closed-form chain-rule probability of one's existence and interprets the tiny result through anthropic reasoning and Gould's contingency thesis.

The Probability of My Existence: A Chain-Rule and Monte Carlo Model of a Family Story

Models a family story as a DAG; derives a closed-form chain-rule probability of one's existence and interprets the tiny result through anthropic reasoning and Gould's contingency thesis.

Predicting Video Comment Counts Using a Hybrid Statistical and Machine-Learning Framework

Hybrid Negative Binomial regression and tree-based ML framework applied to real YouTube data; view count dominates comment counts, and a data-quality defect is identified and documented.

An Integrated Investment Decision-Making Framework

Proposes a four-stage investment framework combining portfolio management, fundamental analysis, and managerial economics; illustrated with a simulated application to the Tehran Stock Exchange.

Restricting a Character-Based Goodness-of-Fit Test on Z 2, 4 : A Power Gain That Is Not Free

Restricting a character-based goodness-of-fit test on Z2,4 to weight-one characters improves power against single-bit alternatives but creates a blind spot against weight-two alternatives.

Which Class Is Stronger? A Bayesian Solution to a Class-Identification Problem

Bayesian solution to a finite-population class-identification problem; introduces exact certainty from sampling without replacement and derives the expected stopping time via negative hypergeometric waiting times.

Data-driven framework for tribological property interpolation in nano-silica/polyurethane clearcoats

Abstract Acrylic polyurethane clearcoats are widely used as protective coatings in automotive and industrial applications; however, their limited abrasion and erosion resistance reduces long-term durability under severe service conditions. In this study, a comparative machine lea...

Quasi-Isometric Rigidity of Teichmüller Space: An Expository Survey of the Eskin-Masur-Kasra Rafi Theorem

Quasi-Isometric Rigidity of Teichmüller Space (A Survey) This is an expository survey of a landmark rigidity theorem for Teichmüller space, proved by Eskin, Masur, and Kasra Rafi. The theorem states that, with a short list of low-complexity exceptions, every quasi-isometry of Tei...

Reproducibility package for Certified hp-Adaptive Collocation with Dual-History Compression for Nonlinear Variable-Order Caputo--Volterra Equations

This archive contains the manuscript source/PDF, numerical implementation, frozen machine-readable results, figures, regression scripts, and directed certificate postprocessor accompanying the paper “Certified hp-Adaptive Collocation with Dual-History Compression for Nonlinear Va...

How Much Does "Success Breeds Success" Actually Change a Free-Throw Sequence? Exact Results Under Illustrative, Literature-Calibrated, and Directly-Estimated State-Dependence, with a Precise Distinction from Dynamical Chaos

Teaching materials on stochastic dependence commonly illustrate the "hot hand" idea with a state-dependent free-throw model in which success probability rises after a make and falls after a miss, often using large, arbitrarily chosen swing magnitudes for pedagogical clarity. We a...

When Should Temporary Capacity Be Added? Optimal Timing of Short-Duration Staffing Boosts in Time-Varying Queues, and Why Fluid Approximations Overstate the Benefit

Service systems facing a predictable demand peak (a lunch rush, a call-center surge) often respond by temporarily adding capacity — a second cashier, an extra agent — for a fixed duration during the busy period. The standard heuristic is to center this temporary capacity on the d...

When Does a New Purchase (or a New Word) Appear? Exact Probability Theory, Validated by Simulation, and Tested Against Real Text Data

Given m categories drawn independently and identically with probabilities P1,...,Pm, the probability that the n-th draw is of a category not seen in the previous n-1 draws is Pr(n-th new) = Σ_i P_i(1-P_i)^(n-1). We first verify this formula and its close relative, the expected nu...

How Much Does "Success Breeds Success" Actually Change a Free-Throw Sequence? Exact Results Under Illustrative, Literature-Calibrated, and Directly-Estimated State-Dependence, with a Precise Distinction from Dynamical Chaos

Teaching materials on stochastic dependence commonly illustrate the "hot hand" idea with a state-dependent free-throw model in which success probability rises after a make and falls after a miss, often using large, arbitrarily chosen swing magnitudes for pedagogical clarity. We a...

Strengthening pre-service teachers personal professional and social skills through the Islamic Iranian model of effective teacher educator training

This qualitative case study explores the execution of an Islamic-Iranian model of the effective teacher educator (ETE) and examines participants’ perceptions of its role in the holistic development of pre-service teachers’ personal, professional, and social skills. Conducted at a...

The Sobolev inequalities along the Ricci-Bourguignon flow and applications

‎Consider a closed Riemannian manifold $M$ where the metrics $g(t)$ evolve by the Ricci-Bourguignon flow (RBF)‎.‎The paper first derives a Sobolev inequality along the RBF‎. ‎Then‎, ‎by applying this‎ ‎Sobolev inequality we obtain a linear parabolic estimate and an upper bound es...

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...

Integrated remote sensing and observation methods to prioritise water well rehabilitation

Water shortage in arid and semi-arid regions has made groundwater the primary source of water supply. However, the performance of water wells gradually declines due to physical, chemical or biological clogging. Identifying wells with the highest rehabilitation potential is of sig...