Hongik University

AI-integrated non-destructive sensing technologies for road condition assessment: recent advancements, technical bottlenecks, and future trajectories

This review presents a comprehensive analysis of recent trends in AI-driven sensing technologies for road condition assessment. Driven by the need for automated monitoring of aging infrastructure, 92 key studies published between 2020 and 2025 were analysed. The review evaluates...

Global sequential equilibrium

Abstract This paper extends the solution concept of sequential equilibrium (SE) to games with infinite decision points and actions, thereby introducing global sequential equilibrium (GSE). While qualitatively similar to SE, GSE distinctively defines posteriors globally as whole p...

A multimodal deep learning-driven model for assessing drawing composition quality

In recent years, digital art education, computerized evaluation systems, and aesthetic computing have prioritized drawing composition quality assessment. Traditional assessments have relied on subjective judgment or single-modal analysis, limiting scalability and uniformity. Exis...

Electrophoretic Deposition of Additive-Free Zeolitic Imidazolate Framework-67-Derived Cobalt Oxide Anodes for Lithium-Ion Batteries

Additive-free electrode architectures are important for clarifying the intrinsic lithium-storage behavior of MOF-derived conversion-type anode materials, because conventional slurry electrodes contain polymer binders and conductive carbon additives that can obscure the electroche...

Development and implementation of an AI-based handwriting recognition tool for math education: improving students’ attitudes and computational thinking

Handwriting recognition for mathematical expressions remains challenging in educational settings, especially when solutions combine Korean text and symbolic notation. This study reports the design and classroom implementation of an AI-based handwriting annotation tool that uses t...

Role of Mn3+/Mn4+ redox-coupled oxygen vacancy modulation in SnO2 nanoarchitectures for ultrasensitive acetone detection

Acetone (CH 3 COCH 3 ) is a ubiquitous volatile organic compound in industrial and laboratory settings; however, its high volatility and toxicity necessitate advanced monitoring to ensure human health and occupational safety. In this work, we report a highly sensitive and selecti...

Uncertainty quantification and parameter optimization of a plasma etching process using a heteroscedastic Gaussian process

This study presents an uncertainty-aware framework for the reliability-based robust design optimization (RBRDO) of plasma etching processes in semiconductor manufacturing. The framework is demonstrated using experimental measurements of the remaining thickness collected at nine w...

Antimony-contact MoS2 FET gas sensors for reinforcement-learning–driven hazard perception at room temperature

Two-dimensional van der Waals semiconductors promise low-power chemical perception at room temperature, yet contact-limited on-currents and slow recovery impede closed-loop decision making in hazardous environments. Here we propose antimony (Sb)-contact two-dimensional (2D) monol...

Design and experimental evaluation of a multi-winding gas-spring gravity compensation mechanism for high-torque sit-to-stand assistance

Conventional gravity compensators capable of handling large loads are often bulky and require hardware modifications for different payload ranges. This study presents a multi-winding gas-spring gravity compensation mechanism (MW-GCM) for high-torque sit-to-stand assistance and ev...

Cycling-Induced Interfacial Reconstruction and Lithium-Storage Kinetics in Additive-Free Electrophoretic Deposition-Derived Methylammonium Lead Bromide Electrodes

Additive-free methylammonium lead bromide (MAPbBr3) electrodes were fabricated by electrophoretic deposition (EPD) directly on Cu foil to investigate Li-storage kinetics while minimizing electrochemical and interfacial contributions associated with polymer binders and conductive...

Environmental Perceptions and Older Adults’ Continued Usage Intention Toward Community Green Open Spaces: The Mediating Roles of Outdoor Activity Motivation and Perceived Emotional Healing

With the accelerating ageing of the population in China, understanding older adults’ intention to continue using Community Green Open Space (CGOS) and the associated psychological pathways is of great importance for age-friendly community planning. However, existing studies have...

Algebraically decaying solutions for magnetohydrodynamic heat and mass transfer in Newtonian flow driven by stretching or shrinking surface: applications to thermal management and cooling technologies

The aim of the current analyses is to examine the thermal and solutal transfer impact on Newtonian fluid flow across permeable expanding/shrinking surfaces, and the impact of solar radiation, magnetic field, and Schmidt number on fluid flow has been extracted. Governing Navier-St...

Influence of inter-particle friction on the angle of repose and stress wave propagation in granular soils: a DEM study

Abstract In geotechnical engineering, the angle of repose (AoR) is widely adopted as an indicator of soil stability and particle interaction. However, AoR can arise from different combinations of inter-particle sliding and rolling friction, each representing different mechanical...

From Grey Infrastructure to Ecological Void: A Study on the Dynamical Time Density Structure of “Taigyoun Space” in Autonomous Driving Environments

Abstract Modern urban streets, largely built on Cartesian orthogonal grids, are geometrically inefficient. Traffic signals further interrupt movement, creating “voids of time” and cutting effective road utility to below 50%. These inefficiencies push dense Asian cities to devote...

Zero-shot inverse imaging with auto-tuned hyperparameters and untrained generative priors

Inverse imaging aims to reconstruct underlying images from noisy and corrupted observations. Conventional model-based methods heavily rely on prior informatioand hyperparameter tuning, while recent deep learning-based methods inherently require large training datasets. This study...

Perfectly Matched Layers for the Simulation of Flexural Waves in Unbounded Euler–Bernoulli Beams

Abstract This paper presents the formulation and implementation of a perfectly matched layer (PML) wave-absorbing boundary for unbounded Euler–Bernoulli beams (EB-PML) in the time domain. To simulate flexural waves in an unbounded beam, the infinite domain is truncated and termin...

Multi‐Level Saturation Current Encoding in Two‐Dimensional Ferroelectric Source‐Gated Transistors

ABSTRACT Synaptic devices for low‐power neuromorphic systems require state variables that are robust against read‐bias variations while supporting multi‐level, non‐volatile operation. Encoding synaptic states directly in voltage‐invariant saturation current represents an attracti...

Discovery of Energy‐Localized Trap States via Opto‐Electrical Spectroscopy in UWBG Perovskite La:SrSnO 3 FETs

ABSTRACT Strontium stannate perovskite (SrSnO 3 ) is emerging as a promising material for next‐generation ultra‐wide bandgap (UWBG) semiconductors due to its high electron mobility and optical transparency. However, despite the critical importance of defect analysis to utilize La...

Sticker Valence Governs Chain Collapse and Liquid‐Liquid Phase Separation in Peptide‐Inspired Associative Polymers

Biomolecular condensates, including membraneless organelles, form through liquid-liquid phase separation (LLPS) driven by sequence-specific associations within intrinsically disordered protein regions. Understanding how sticker valence governs LLPS is essential for predicting pat...

Effects of insoluble surfactants on breaking waves: regular and spilling regimes

We investigate the influence of insoluble surfactants on the spatio-temporal evolution of breaking waves, focusing on both regular and spilling regimes. Three-dimensional direct numerical simulations are conducted using an interface-tracking/level-set method that incorporates sur...