Seoul National University

Protocol aware machine learning for prediction and selection of flooding recovery strategies in open cathode PEM fuel cells without recovery transient measurements

A protocol aware machine learning framework enables prediction and selection of flooding recovery strategies in open cathode PEM fuel cells without measuring the recovery transient. Four recovery modes, step-up, pulse-up, ramp-up, and short-circuit pulse, are characterized over 1...

Identifying technological problems and exploring potential solutions to support R&D: Tech-mining with multi-LLM applications

The shortening of technology lifecycles and growing technological complexity have made the rapid identification of technical problems and exploration of solutions a critical challenge. Patent analysis can serve as a crucial tool for supporting R&D activities by extracting problem...

Visibility of the Korean National Health Information Portal across search engines and generative artificial intelligence platforms: a repeated cross-sectional study

Objectives: This study assessed changes in the visibility of the National Health Information Portal (NHIP), operated by the Korea Disease Control and Prevention Agency, across conventional search portals and generative artificial intelligence (AI) platforms. Methods: We analyzed...

Beyond body mass index: A contemporary review of obesity and female infertility

Obesity is increasingly understood as a reproductive-metabolic condition that can affect female fertility across the continuum from natural conception to assisted reproductive technology (ART). Excess adiposity may disrupt hypothalamic-pituitary-ovarian regulation, insulin signal...

Effect of the Number of Free Faces on Excavated Volume, Advance, and Specific Charge in Model-Scale Single-Hole Blasting: Experiments and Numerical Simulations

Abstract A free face is an exposed, unconfined rock surface that allows blasted rock to move or expand freely upon detonation. The number of free faces fundamentally governs blasting performance in both surface and underground excavation, yet its effects have not been sufficientl...

Seroprevalence and Clinical Characteristics of Hepatitis D Virus Infection in Korean Patients with Chronic Hepatitis B, Liver Cirrhosis, and Hepatocellular Carcinoma

Background/Aims: Hepatitis delta virus (HDV) coinfection exacerbates clinical outcomes in chronic hepatitis B (CHB) patients.With emerging HDV-targeted therapeutics, accurate prevalence and clinical impact data are essential.In this study, the seroprevalence, clinical significanc...

Multistage Cost Estimation Framework for Transparent and Granular Bridge Maintenance

Abstract Bridge maintenance cost is not an isolated variable but a constructed outcome derived from damage size, repair method, and unit cost. However, existing data-driven approaches often treat cost estimation as a black-box prediction problem, providing only aggregated cost va...

Bilateral Palatal Root Agenesis of Maxillary Fourth Premolars in 2 Welsh Corgis: A Cone Beam Computed Tomography (CBCT)-Based Case Report

Palatal root agenesis of the maxillary fourth premolar (PM4) is a rarely reported developmental anomaly in dogs. This report describes 2 cases of bilateral palatal root agenesis in Welsh Corgis that had complicated crown-root fractures. Initial intraoral radiography suggested abs...

Texture evolution and tension–compression yield symmetry of AZ31 magnesium alloy during cyclic extrusion and compression: Experiments and polycrystal plasticity simulations

Cyclic extrusion and compression (CEC) was selected as a representative variable-strain-path process for mitigating tension–compression yield asymmetry in extruded AZ31 magnesium alloy. A machine-learning-assisted VPSC-dDRX(CA) framework was developed to characterize the associat...

Who cares for the caregivers? Health check-up participation among mothers caring for children with developmental disabilities in Korea: findings from the National Health Insurance Service database and a nationwide survey

Caregiving burden may hamper caregivers’ access to healthcare services. This study assessed participation rates of national health check-ups among mothers caring for children with developmental disabilities (MCCDD) in Korea and explored reasons for non-participation. We analyzed...

Radiofrequency Ablation for Papillary Thyroid Carcinoma versus Surgery and Other Thermal Ablation Techniques: A Systematic Review and Meta-Analysis of Outcomes

Background: Radiofrequency ablation (RFA) has been proposed for selected patients with low-risk papillary thyroid carcinoma (PTC). This study compared the effectiveness, safety, and procedural characteristics of RFA with those of surgery and other thermal ablation techniques. Met...

Seasonal characteristics of submicron aerosols in the coastal atmosphere of southeastern Korea: Influence of urban-port outflow

The impacts of emissions from major urban-port complexes on the coastal marine atmosphere remain insufficiently constrained. Seasonal measurements of submicron aerosol mass concentrations, chemical composition, and particle size distributions were conducted at Geoje Island, a coa...

Automated CT-based quantification of knee osteophytes for robotic-assisted total knee arthroplasty: a multi-cohort study

Abstract Preoperative computed tomography (CT) is routinely acquired for planning robotic-assisted total knee arthroplasty (TKA), yet osteophyte burden is not quantitatively characterized. We developed automated CT-based osteophyte quantification and evaluated it against blinded...

IscR-mediated morphological regulation confers virulence and stress resistance by reducing stress molecule uptake in Acinetobacter baumannii

ABSTRACT Living organisms must adequately respond to stress to survive and proliferate. Bacterial pathogens face multiple stressors during infections, including oxidative stress from host innate immune cells and antibiotic treatment from clinical therapy. The pathogenic bacterium...

Complex Upper-Mantle Anisotropy Beneath the Pacific Triangle Revealed by Shear-Wave Splitting

Abstract Understanding mantle flow beneath old oceanic plates is essential for linking present-day plate motions with long-term lithospheric evolution, yet direct constraints remain sparse due to limited offshore observations. Here, we investigate upper-mantle seismic anisotropy...

Early Mitral Valve Surgery and Survival in Asymptomatic Severe Primary Mitral Regurgitation

Importance The optimal timing of mitral valve (MV) surgery in patients with asymptomatic severe primary mitral regurgitation (MR) remains uncertain because randomized clinical trials are lacking. Objective To evaluate the association of early MV surgery with long-term survival in...

Value and spatial preferences guide habitual reaching and manual object selection in primates

Habits are automatic actions shaped by prior experience, enabling efficient and fast responses in stable environments. While habitual gaze rapidly directs the eyes toward valuable objects, the mechanisms underlying habitual manual choice for reaching and grasping remain unclear....

Three-year outcomes of combined surgical peripheral iridectomy, goniosynechialysis and goniotomy for advanced primary angle-closure glaucoma: a multicentre study

Aims To assess the 3-year efficacy and safety of combined surgical peripheral iridectomy (SPI), goniosynechialysis (GSL) and goniotomy (GT) for advanced primary angle-closure glaucoma (PACG) without cataract. Methods This was a multicentre prospective observational study with ext...

Wireless Monolithic Tandem Leaf for Semi-Artificial Photosynthesis

Abstract Biocatalytic semi-artificial photosynthesis enables selective solar-to-chemical conversion by harnessing photoelectrocatalytic platforms to drive redox biocatalysis. However, the reliance of most photoelectrochemical (PEC)-based devices on transparent conductive oxides (...

Explainable Deep Learning Reveals Future Changes in East Asian Extreme Winter Predictability

Deep learning-based approaches have emerged as powerful tools for seasonal prediction, yet their skill remains limited for extreme anomalies, and warming climates may alter predictability sources. Here we present a convolutional neural network (CNN)-based framework to assess how...