Sun Hee Kim

Load-Carrying Capacity of Hybrid Concrete-Filled FRP Piles

Sun Hee Kim

Piles are structural members subjected to combined compression and bending and are typically constructed in soil or underwater environments. As a result, they are exposed to moisture, chloride attack, and various chemical agents, which may lead to cross-sectional deterioration. These environmental effects …

kr (code pays fourni par la source)

Evaluation of the Material Properties of Cementitious Mixtures Containing Biochar

Seung Beom Kang, Namhyun Kim, Sun Hee Kim, Wonchang Choi

Time variation of error field correction in ITER

Xue Bai, Alberto Loarte, Y. Gribov, J-K Park et autres

Abstract The time variation of the required error field correction (EFC) in ITER is evaluated in a feedforward way based on estimates of the total n= 1 error fields (EFs, where n is the toroidal mode number) for two typical ITER scenarios: …

fr, kr, us (code pays fourni par la source)

Integrated operation scenarios: Chapter 6 of the special issue: on the path to tokamak burning plasma operation

Yong-Su Na, Eugenio Schuster, Robert V. Budny, Andrea M Garofalo et autres

Abstract Here we report the progress of the development and optimization of operational scenarios for ITER and beyond, focusing upon baseline, hybrid, and steady-state scenarios since 2007. This includes advancements made by the integrated operation scenarios (IOS) topical group of the international …

Influences of Temperature Variations Around Subway Ventilations on Fractures of Continuous Welded Rail Fractures

Jung-Youl Choi, Sang-Yeol Park, Sun Hee Kim, Jee-Seung Chung

This study examines factors affecting the thermal expansion behavior of continuous welded rails (CWRs) in urban rail systems and investigates conditions that lead to rail weld fractures. Parameters affecting CWR fractures near ventilation shafts in urban rail systems are identified through field …

kr (code pays fourni par la source)

Maintenance Method for Rail Corrugation Considering Wheel–Rail Interaction Force

Jung-Youl Choi, Sun Hee Kim

Rail corrugation causes various problems such as a decrease in ride comfort due to aggravation of train noise and vibration, and an increase in the amount of track component maintenance due to the amplification of the track impact. Most of the preceding …

kr (code pays fourni par la source)

Qualitative Analysis of Sleeper Supporting Condition for Railway Ballasted Tracks Using Modal Test

Jung-Youl Choi, Taerim Yoon, Sun Hee Kim

During railway operations, changes in the support conditions of sleepers, owing to various internal and external factors, can damage rails and concrete sleepers and alter the structural characteristics of gravel-ballasted tracks. However, current methods for evaluating gravel ballast conditions primarily rely on …

kr (code pays fourni par la source)

Determination of bearing capacity of fiber-reinforced polymer screw piles via field loading tests

Sun Hee Kim, Wonchang Choi

This study investigated the pull-out performance of fiber-reinforced polymer (FRP) screw piles using full-scale field loading tests. FRP screw piles are lightweight, corrosion-resistant alternatives to traditional piles, particularly suited for soft ground (i.e., saline reclamation sites) applications such as solar power structures. …

kr (code pays fourni par la source)

Access and sustainment of ELMy H-mode operation for ITER pre-fusion power operation plasmas using JINTRAC

Emmi Tholerus, Luca Garzotti, V. Parail, Yuriy Baranov et autres

Abstract In the initial stages of ITER operation, ELM mitigation systems need to be commissioned. This requires controlled flat-top operation in type-I ELMy H-mode regimes. Hydrogen or helium plasma discharges are used exclusively in these stages to ensure negligible production of neutrons …

gb, fr, it, se (code pays fourni par la source)

Estimating Invisible Passenger Count Using CCTV Footage: An Approach Combining Object Detection Models and Machine Learning

Kyunghee Kim, Tae-Ki Ahn, Sun Hee Kim

Accurate passenger counting is essential for managing congestion in railway vehicles. Although onboard CCTV footage can be used for this purpose, limited camera views often cause occlusion, making some passengers invisible. Thus, even with precise detection of visible individuals using object detection …

kr (code pays fourni par la source)

Deterioration Behavior of Concrete Beam Reinforced with Carbon Fiber-Reinforced Plastic Rebar Exposed to Carbonation and Chloride Conditions

S. Lee, Sun Hee Kim, Wonchang Choi

The absence of carbon fiber-reinforced rebar performance standards in Korea has limited its reliability. This study investigates the durability performance of carbon fiber-reinforced polymer rebar as an alternative to traditional steel reinforcement in concrete structures. Concrete beams reinforced with carbon fiber-reinforced polymer …

kr (code pays fourni par la source)

Theory-based integrated modelling of tungsten transport in ITER plasmas

Daniel Fajardo, C. Angioni, Sun Hee Kim, F. Koechl et autres

Abstract A wide variety of ITER plasmas are investigated using a recently-developed integrated modelling framework, with particular emphasis on the transport and effects of tungsten (W) motivated by ITER’s new full-W walls. This workflow is entirely based on theoretical transport models and …

de, fr (code pays fourni par la source)