A5002719741- Microstructure and Mechanical Properties of Steels
- High Entropy Alloys Studies
- Advanced Photocatalysis Techniques
- Additive Manufacturing Materials and Processes
- Metal Alloys Wear and Properties
- Thin-Film Transistor Technologies
- Advanced Fiber Optic Sensors
- Semiconductor materials and devices
- Hydrogen embrittlement and corrosion behaviors in metals
- Nanowire Synthesis and Applications
- Silicon and Solar Cell Technologies
- Electrocatalysts for Energy Conversion
- Semiconductor materials and interfaces
- Photonic and Optical Devices
- Advanced Radiotherapy Techniques
- High-Temperature Coating Behaviors
- Metal and Thin Film Mechanics
- Orthopaedic implants and arthroplasty
- Radiation Therapy and Dosimetry
- High-Velocity Impact and Material Behavior
- Metallurgy and Material Forming
- Quantum Dots Synthesis And Properties
- Electronic and Structural Properties of Oxides
- Surface Treatment and Residual Stress
- Flow Measurement and Analysis
Sungkyunkwan University
2025
Research Institute of Industrial Science and Technology
2022-2023
Hanyang University
2014-2023
Hyundai Motors (South Korea)
2022-2023
Pohang University of Science and Technology
2004-2021
Korea Research Institute of Standards and Science
2021
Korea Institute of Machinery and Materials
2020
Ansan University
2015-2019
Soonchunhyang University Hospital
2019
Kwangju Christian Hospital
2013-2016
Precipitation strengthening has been the basis of physical metallurgy since more than 100 years owing to its excellent effects. This approach generally employs coherent and nano-sized precipitates, as incoherent precipitates energetically become coarse due their incompatibility with matrix provide a negligible effect or even cause brittleness. Here we propose shear band-driven dispersion semicoherent which show significant We add aluminum model CoNiV medium-entropy alloy face-centered cubic...
A diaphragm-based interferometric fiberoptic sensor that uses a low-coherence light source was designed and tested for on-line detection of the acoustic waves generated by partial discharges inside high-voltage power transformers. The fused-silica diaphragm single-mode optical fiber encapsulated in glass tube to form an extrinsic Fabry-Perot interferometer, which is interrogated light. Test results indicate these optic sensors are capable faithfully detecting signals propagating transformer...
We have demonstrated a single fiber probe for simultaneous measurement of external refractive index and temperature based on two interferometers: reflection-mode long-period grating (LPG) refractometry an intrinsic Fabry-Perot interferometer (IFPI) measurement. Since the output signal combined structure is superposition signals produced by both sensors, which different spatial frequencies, original needed measurements can be separated recovered through digital filters.
We present two novel schemes for refractometry based on a long-period fiber grating– (LPG-) Michelson interferometer. These are designed to overcome the measurement dependence of previously demonstrated LPG-based immersion depth. The first utilizes an unshielded LPG and second, shielded one. Both were tested over certain refractive-index range, glucose concentration in water was experimentally demonstrated. In addition, temperature sensitivity is discussed.
Background. The benefits of proton beam craniospinal irradiation (PrBCSI) in children have been extensively reported dosimetric studies. However, there is limited clinical evidence supporting the use PrBCSI. We compared acute toxicity PrBCSI relative to that conventional photon CSI (PhBCSI) with brain tumours.Material and methods. prospectively evaluated haematological gastrointestinal toxicities 30 patients who underwent between April 2008 December 2012. As a reference group, we...
A monolithically integrated eight-channel optical multiplexer (Mux) with a 400 GHz channel spacing ~1550 nm is presented based on silicon-on-insulator rib waveguide and an asymmetric Mach-Zehnder interferometer. All channels were optimized independently heaters. The fully tuned Mux shows adjacent isolation of ~13 dB, excess loss ~2.6 uniformity ~1.5 dB over 25 wavelength span. In addition, the phase tuning efficiency for different interlevel dielectric layer thicknesses thermal crosstalk...
Abstract We investigated the effects of O 2 annealing and N plasma surface treatment on polycrystalline silicon (poly-Si) to improve hysteresis low-temperature (LTPS) thin-film transistors (TFTs). The surface-treated LTPS TFTs exhibited a reduction in subthreshold swing ( SS ). However, improvement was not significantly observed compared non-treated TFTs. greater than These results originated from trap states at interface between poly-Si gate insulator. Compared treatment, makes more stable...
We studied how preoperative templating corresponded to the postoperative leg length in total hip arthroplasty.On average, predictive value of desired corrective change was +4.9 (+4.0–+6.7) mm, while true assessed +4.7 (+4.0–+6.3) mm. On radiographs, ratio horizontal offset a pathological side normal 95%, on and it increased 96%, after an operation. Preoperatively planned sizes acetabular cup femoral stem by showed high rate coincidence with used intraoperatively.In conclusion, accurate...
Abstract Quasi-static and dynamic compressive properties of an FCC-based metastable HEA (composition; V10Cr10Fe45Co35 (at.%)) showing both Transformation Induced Plasticity (TRIP) TWinning (TWIP) were investigated at room cryogenic temperatures. During the quasi-static compression temperature, FCC to BCC TRIP occurred inside grains, resulted in very high strain-hardening rate consequently maximum strength over 1.6 GPa. The was higher by 240 MPa than because strain-rate-hardening effect, kept...