Sunmi Shin
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View article: Strategic Mobility Engineering in 2D Semiconductor‐based FETs for Enhanced Electronic Devices
Strategic Mobility Engineering in 2D Semiconductor‐based FETs for Enhanced Electronic Devices Open
As silicon‐based electronics approach the physical limits of Moore's Law, 2‐Dimensional (2D) semiconductors emerge as promising candidates for next‐generation electronic devices due to their atomic‐scale thickness and inherently high carri…
View article: A Solid Polymer Film with Giant Thermoelectric Properties by Polar Level Splitting with an Organic Donor
A Solid Polymer Film with Giant Thermoelectric Properties by Polar Level Splitting with an Organic Donor Open
Thermoelectric (TE) materials are significant for sustainable development because they can harvest waste heat into electricity. Here, a treatment of a solid film of poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films …
View article: Microstructure and Mechanical Properties of Wire Laser Additive Manufactured Deposits and Their Tungsten Inert Gas Welds
Microstructure and Mechanical Properties of Wire Laser Additive Manufactured Deposits and Their Tungsten Inert Gas Welds Open
Ti-6Al-4V (Ti64) alloy is widely utilized in the aerospace industry due to its high strength, fatigue resistance, corrosion resistance, and cryogenic properties. However, its high raw material costs and machining difficulties necessitate t…
View article: Scalable and environmentally friendly MXene-tetrahedrites for next-generation flexible thermoelectrics
Scalable and environmentally friendly MXene-tetrahedrites for next-generation flexible thermoelectrics Open
Traditional thermoelectric generators (TEGs) face scalability challenges due to high-temperature, long-duration curing processes and rare-earth/toxic chalcogenides such as bismuth telluride.
View article: Investigating on thermal insulation in concrete partition wall with insulation-material-infilled Voronoi sections: Feature impact analysis and efficient assessment approach
Investigating on thermal insulation in concrete partition wall with insulation-material-infilled Voronoi sections: Feature impact analysis and efficient assessment approach Open
Reducing energy consumption in building operations, occupying 27 % of total carbon emissions, is crucial for decarbonization. Concrete partition walls with insulation-filled hollow sections, offer high thermal resistance, reducing air cond…
View article: Process Parameter Optimization for Laser Powder Bed Fusion of Fe-Si Alloy Considering Surface Morphology and Track Width of Single Scan Track
Process Parameter Optimization for Laser Powder Bed Fusion of Fe-Si Alloy Considering Surface Morphology and Track Width of Single Scan Track Open
A laser power bed fusion (L-PBF) manufacturing process was optimized by analyzing the surface morphology and track width w of single scan tracks (SSTs) on Fe-3.4wt.%Si. An SST was evaluated under process conditions of laser power P, scan s…
View article: Bayesian-based optimization of concrete infill pattern for enhancing thermal insulation performance
Bayesian-based optimization of concrete infill pattern for enhancing thermal insulation performance Open
This study explores the impact of vertical and horizontal configurations on thermal insulation in cellular concrete brick design, aiming to identify optimal insulation patterns. Results indicate that under a constant volume (67%) of coconu…
View article: Feasibility Study on the Fabricating of Carbon-Nanotube-Reinforced Al-Si-Cu Alloy Matrix Composites Using Oxygen-Replacing Die Casting Process
Feasibility Study on the Fabricating of Carbon-Nanotube-Reinforced Al-Si-Cu Alloy Matrix Composites Using Oxygen-Replacing Die Casting Process Open
A383 Al-Si-Cu alloy matrix composites were reinforced with different amounts (0.5, 1.0, 1.5 and 2.0 wt%) of chopped multiwalled carbon nanotubes (MWCNTs) and fabricated using the oxygen-replacing die casting (ORDC) process to reduce gas po…
View article: Specimen Geometry Effect on Experimental Tensile Mechanical Properties of Tough Hydrogels
Specimen Geometry Effect on Experimental Tensile Mechanical Properties of Tough Hydrogels Open
Synthetic tough hydrogels have received attention because they could mimic the mechanical properties of natural hydrogels, such as muscle, ligament, tendon, and cartilage. Many recent studies suggest various approaches to enhance the mecha…
View article: Enhanced far-field coherent thermal emission using mid-infrared bilayer metasurfaces
Enhanced far-field coherent thermal emission using mid-infrared bilayer metasurfaces Open
Direct probing of surface phonon-polariton-enhanced coherent far-field thermal emission using Ge 2 Sb 2 Te 5 /SiO 2 bilayer metasurfaces.
View article: Concurrent Operation of Round Beam and Flat Beam in a Low- Emittance Storage Ring
Concurrent Operation of Round Beam and Flat Beam in a Low- Emittance Storage Ring Open
In 4th-generation storage rings, whether to operate the beam as round or flat is a critical question. A round beam has equal horizontal and vertical emittances, and is an efficient solution to reduce strong intra-beam scattering effects an…
View article: Effect of Gas Bubbling Filtration Treatment Conditions on Melt Quality of AlSiMgCu Alloy
Effect of Gas Bubbling Filtration Treatment Conditions on Melt Quality of AlSiMgCu Alloy Open
In this study, the optimal conditions of gas bubbling filtration (GBF) treatment for securing highly-clean molten Al-Si-Mg-Cu alloy were identified. The effects of GBF treatment time and stabilization time on the degree of molten metal cle…
View article: Effects of Casting Conditions for Reduced Pressure Test on Melt Quality of Al-Si Alloy
Effects of Casting Conditions for Reduced Pressure Test on Melt Quality of Al-Si Alloy Open
The present study investigated the effect of the casting conditions for the reduced pressure test (RPT) on the melt quality of Al-Si alloy. The casting conditions considered in RPT were the atmospheric exposure during melting, sampling met…
View article: Effect of Heat Treatment and Drawing on High-Manganese Steel Pipe Welded by Gas Tungsten Arc
Effect of Heat Treatment and Drawing on High-Manganese Steel Pipe Welded by Gas Tungsten Arc Open
This study investigated the effect of post-weld processes including annealing and drawing on the microstructure and mechanical properties of high-Mn steel pipes welded by gas tungsten arc welding. The weld metal showed a solidified microst…
View article: Effects of Cooling Rate during Quenching and Tempering Conditions on Microstructures and Mechanical Properties of Carbon Steel Flange
Effects of Cooling Rate during Quenching and Tempering Conditions on Microstructures and Mechanical Properties of Carbon Steel Flange Open
This study investigated the mechanical properties of steel in flanges, with the goal of obtaining high strength and high toughness. Quenching was applied alone or in combination with tempering at one of nine combinations of three temperatu…
View article: High-contrast and reversible polymer thermal regulator by structural phase transition
High-contrast and reversible polymer thermal regulator by structural phase transition Open
An average thermal switching ratio of ~8× and maximum switching ratio of ~10× is achieved within a temperature range of 10 K.
View article: Effects of Mg Content on Hydrogen Content and Melt Quality of Al-Mg Alloys
Effects of Mg Content on Hydrogen Content and Melt Quality of Al-Mg Alloys Open
In Al-Mg alloys with Mg content 0 ≤ XMg ≤ 6 wt. %, the effects of XMg on dissolved hydrogen content ([H]) and melt quality were investigated. [H] was measured using the Closed-Loop Recirculation method, and the melt quality was quantified …
View article: Microstructure and Mechanical Properties of Gas Tungsten Arc Welded High Manganese Steel Sheet
Microstructure and Mechanical Properties of Gas Tungsten Arc Welded High Manganese Steel Sheet Open
This study investigated microstructure and mechanical properties of high manganese steel sheet fabricated by gas tungsten arc welding (GTAW). The weld zone showed longitudinal coarse grains due to the coalescence of columnar dendrites grow…
View article: Advanced Materials for High‐Temperature Thermal Transport
Advanced Materials for High‐Temperature Thermal Transport Open
High temperature processes are widely used in a variety of existing and emerging industrial and aerospace applications. The thermal properties of high‐temperature materials thus play an important role in controlling the thermal energy, as …
View article: The Effects of Exposure Frequency and Task-Induced Involvement Load on EFL Middle School Students’ Learning of L2 Collocations
The Effects of Exposure Frequency and Task-Induced Involvement Load on EFL Middle School Students’ Learning of L2 Collocations Open
A great deal of exposure to words and deeper processing of the tasks are believed to facilitate learners’ vocabulary learning. However, previous studies have been confined to examining the effects of these two factors solely in learning si…