Research works

Dynamics of internal solitary waves with nonlocal coupling via a two-dimensional modified intermediate long wave model

This study presents a novel (2+1)-dimensional modified Intermediate Long Wave (2D-mILW) model to characterize the internal solitary waves (ISWs) in finite-depth, stratified oceans. Unlike classical one-dimensional models, the proposed model incorporates nonlocal interfacial coupl...

Graph-based reinforcement learning framework with control barrier functions for safe marine traffic control

Centralized control that optimizes ship behavior is an effective approach for managing marine traffic in congested waters. This study proposed a decision-making framework that generates optimal control actions for all ships in a sea area using traffic data represented as a graph....

Locational Assessment of Feasible Connection Capacity Ranges for AI Inference Data Centers in Distribution Networks with Photovoltaics

This study evaluates location-dependent feasible connection capacity intervals for AI inference data centers in a distribution network with photovoltaics. A synthetic 24-hour facility load profile is constructed from public inference request traces, measured processor power chara...

Analysis of Location-Dependent Temperature Characteristics of an ESS Battery Cell under Different C-rates and Cooling Conditions

The increasing use of energy storage systems has intensified the need for effective battery thermal management. This study investigated the location-dependent temperature characteristics of an ESS battery cell under different C-rates and cooling conditions. A 94 Ah prismatic lith...

tiRNA-Pro-AGG-001 serves as a host-directed prognostic biomarker and therapeutical target for pediatric sepsis

Pediatric sepsis and septic shock remain major causes of mortality in Children, yet robust, mechanistically anchored biomarkers for severity stratification are limited. We profiled plasma tRNA-derived small RNAs (tsRNAs) in children with sepsis and septic shock, and validated can...

A Study on the AC Breakdown Characteristics of K6 Gas according to Moisture Concentration in a Quasi-uniform Field at Atmospheric Pressure

Regulation (EU) 2024/573 bans fluorinated gases in distribution switchgear rated 24kV and below from 2026. K6, a mixture of 10mol% PMVE (perfluoromethyl vinyl ether) in CO₂, is an early-stage SF6 replacement whose breakdown characteristics under varying field utilization factor a...

A data-driven approach to forecasting end-of-life photovoltaic module waste

Photovoltaic (PV) technology is central to the transition towards net-zero energy systems. Today’s deployment, however, translates into a growing wave of electronic waste once modules reach end of life. Robust projections of future waste streams are therefore critical for the tim...

Establishment of a 4K Flat-plate Calorimeter Test Procedure and Evaluation of the Thermal Insulation Performance of MLI for Liquefied Hydrogen Storage Tank Applications

Liquefied hydrogen (LH₂) must be stored at an ultra-cryogenic temperature of approximately 20 K. If external heat ingress is not effectively minimized, boil-off gas (BOG) generation increases, leading to fuel loss, reduced system efficiency, and potential safety risks. Therefore,...

Event-Based Power Quality Analysis and Assessment Procedure for a PV-ESS Integrated Demonstration Facility

This study evaluates the power quality of a full-scale PV-ESS demonstration facility integrating PV generation, ESS, EV chargers, and office loads. Two field datasets were combined: 1-min VCB relay data at the high-voltage grid connection point and 1-s high-resolution measurement...

Incidence, risk factors, and mortality of acute kidney injury in patients receiving immune checkpoint inhibitors: analysis by acute kidney injury subtype

Background: Acute kidney injury (AKI) is a common complication in patients receiving immune checkpoint inhibitor (ICI) therapy. It can result from conventional causes or immune-mediated mechanisms. This study aimed to determine the incidence, risk factors, and clinical outcomes o...

Modulating liquid metal flow by IN718 addition to improve surface quality in laser direct metal deposition of SS 316L

The surface quality of cladding layer (CL) in laser direct metal deposition (LDMD) is strongly related to liquid metal flow. Improving the surface quality by modulating liquid metal flow is an effective strategy. Hence, a three-dimensional thermo-fluid dynamic model is establishe...

A Study on Degradation-Topology Graphs for Asset Failure Probability Prediction in MVDC Distribution Systems

Asset management for MVDC distribution systems faces two obstacles: the modular multilevel converter couples hundreds of components so that one asset's aging accelerates its neighbors', and no operating MVDC system has failure records to learn this coupling from. This paper answe...

The Effects of Cognitive–Perceptual Style on the Multilevel Organization of Postural Control During Motor Imagery and Immersive Virtual Reality

Understanding the central nervous system responses to different threats of balance loss is instrumental for developments in behavioral neurophysiology and rehabilitation. Motor imagery (MI) and virtual reality (VR) are used to model postural threats. Cognitive–perceptual style, s...

Adaptive Dead-time Algorithm for Reducing Body-Diode Conduction Loss in an LLC Resonant Converter

LLC resonant converters can achieve zero-voltage switching (ZVS) of the primary-side switches by utilizing the characteristics of the resonant tank, and are therefore widely employed in various power conversion applications requiring high efficiency. Conventional dead-time design...

Forecasting 2026 Congressional Control: A Comparison of IEM and Kalshi Prediction Markets

We report Iowa Electronic Markets (IEM) and Kalshi prediction market forecasts for the congressional control configuration resulting from the 2026 U.S. midterm elections.Both exchanges run separate markets on House and Senate control.Both indicate the most likely outcome is Democ...

Faults analysis of cables and connectors of photovoltaic systems for electrical safety

본 논문에서는 사고가 발생한 태양광발전소의 커넥터 및 케이블 발열 원인을 케이블 선정, 허용전류 산정, 케이블 및 커넥터 시공 방법으로 나누어 분석하였다. 표 4는 사고가 발생한 태양광 발전설비의 분석 결과를 나타낸다. 표 4에서 확인할 수 있듯이 해당 태양광 발전소에서 사용된 케이블의 설계...

A Multimodal Data-Based Deep Learning Model for Partial Discharge Detection in Solid- and Liquid-Insulated Electrical Equipment

This paper proposes a multimodal data-based deep learning model for partial discharge detection in solid- and liquid-insulated electrical equipment to support early fault diagnosis and electrical accident prevention. Existing approaches often rely on a single data modality, which...

Energy-dependent competing pathways in the plasma processing of fused silica: from topology-selective relaxation to network disordering

Oxygen-plasma processing can attenuate polishing-induced topographic features on fused silica, whereas increasingly energetic bombardment can disorder the near-surface network. Atomic force microscopy, Raman spectroscopy, laser-damage measurements, plasma diagnostics, and molecul...

Racialized ethics of surrogacy: Transnational reproductive tourism and local surrogacy practices in Uganda

This study examines surrogacy practices in Uganda by analyzing how various actors operationalize "ethical surrogacy" in inbound and local contexts. Drawing on ethnographic fieldwork in Kampala, the study compares surrogacy programs organized by a foreign agency for Western intend...

Analysis of Electric Field Redistribution in Oil-Pressboard Insulation of a ±525 kV HVDC Converter Transformer under AC/DC Superimposed Voltage

HVDC converter transformers are subjected to complex electrical stresses because AC and DC voltage components coexist on the valve winding. This study investigates time-dependent electric-field redistribution in the oil-pressboard insulation of a ±525 kV VSC-HVDC converter transf...