A5101668943- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Fatigue and fracture mechanics
- Aluminum Alloy Microstructure Properties
- Antenna Design and Optimization
- Antenna Design and Analysis
- Neuroscience and Neural Engineering
- Non-Destructive Testing Techniques
- Nanoplatforms for cancer theranostics
- Additive Manufacturing Materials and Processes
- Industrial Vision Systems and Defect Detection
- Microstructure and Mechanical Properties of Steels
- Advanced machining processes and optimization
- Structural Health Monitoring Techniques
- Immunotherapy and Immune Responses
- Laser and Thermal Forming Techniques
- Real-Time Systems Scheduling
- Asian Culture and Media Studies
- Ultrasonics and Acoustic Wave Propagation
- 3D Printing in Biomedical Research
- Engineering Applied Research
- Graphene and Nanomaterials Applications
- 2D Materials and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Media Influence and Politics
Seoul National University
2012-2025
Korea Institute of Industrial Technology
2013-2024
Sungkyunkwan University
2024
Tsinghua University
2024
Anyang University
2023
Hanyang University
2021-2023
Electronics and Telecommunications Research Institute
2022
Gwangju Institute of Science and Technology
2015-2021
Seoul Media Institute of Technology
2021
Gwangju University
2015
Due to the trade-off between their electrical/electrochemical performance and underwater stability, realizing polymer-based, high-performance direct cellular interfaces for electrical stimulation recording has been very challenging. Herein, we developed transparent conductive based on a water-stable, poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) film via solvent-assisted crystallization. The crystallized PEDOT:PSS polyethylene terephthalate (PET) substrate exhibited...
For manufacturing components with thick plates, such as in the heavy equipment and shipbuilding industries, gas metal arc welding (GMAW) process is applied. Among that apply plate GMAW process, there are groove butt joints, which fabricated through multi-pass welding. Various qualities managed welding, root-pass weld controlled to ensure complete joint penetration (CJP). Currently, state of during visually, making it difficult confirm condition real time. Therefore, a need predict In this...
Bacterial biopolymers have drawn much attention owing to their unconventional three‐dimensional structures and interesting functions, which are closely integrated with bacterial physiology. The nongenetic modulation of (Acetobacter xylinum) cellulose synthesis via nanocarbon hybridization, its application the emulation layered neuronal tissue, is reported. controlled dispersion graphene oxide (GO) nanoflakes into (BC) culture media not only induces structural changes within a crystalline...
Modulating the tumor immune microenvironment to activate cells has been investigated convert cold hot tumors. Here, we report that metal–lipid hybrid nanoparticle (MLN)-mediated gene editing of transforming growth factor-β (TGF-β) can restructure an "immune activated" state for subsequent immunotherapy. MLNs with cationic lipids and elemental metallic Au inside were designed deliver plasmid DNA encoding TGF-β single guide RNA Cas9 protein (pC9sTgf) near-infrared light (NIR) heat. Upon NIR...
In gas–metal arc welding (GMAW), the quality is influenced by various factors, including conditions and external environment. Achieving a high requires careful observation control. Welding monitoring crucial for validating planned process assessing its quality. This study introduces vision system online acquisition of clear molten pool images. It uses small camera equipped with complementary metal-oxide-semiconductor sensor during GMAW, as well method constructing this system. The proposed...
The incorporation of RGD-coupled fibrous particles into the alginate hydrogel promotes 3D-encapsulated cell behaviours by allowing mutual binding with particles.
In this study, the effect of weld bead shape on fatigue strength lap fillet joints using gas metal arc welding (GMAW) process was investigated. The base material used in experiment 590 MPa grade galvanealed steel sheet with 2.3 mm and 2.6 thickness. order to make four types beads different shapes by factors such as length, angle, area, process, wire feeding speed, joint were changed. stress-number cycles failure (S–N) curve obtained from test for bead, cause difference clarified through...
An efficient nondestructive testing method of resistance spot weld quality is essential in evaluating the all welded joints automotive components a car body production line. This study proposes prediction algorithm for welding that can predict geometrical and physical properties spot-welded joint evaluate based on acceptance criteria. To this end, four statistical models main joint, including tensile shear strength, indentation depth, expulsion occurrence, failure mode, were estimated...
Weld defects such as blowholes and surface pores occur due to zinc vaporization during the gas metal arc welding of lap fillet joints Zn-coated steel. In this study, effect porosity on fatigue behavior was investigated. A steel sheet with strength 590 MPa a thickness 2.3 mm used base material. Three kinds specimens weld pore defects, pores, were prepared tensile shear strength, hardness The in welds reduced strength. test, at higher load stresses between 122 366 MPa, life weld. However, did...
For the automation of a laser beam welding (LBW) process, weld quality must be monitored without destructive testing, and assessed. A deep neural network (DNN)-based assessment method in spectrometry-based LBW is presented this study. spectrometer with response range 225–975 nm designed fabricated to measure analyze light reflected from area process. The classified through experiments, spectral data are thus analyzed using spectrometer, according conditions classes. measured converted RGB...
Distributed systems, where the processes send and receive their messages remotely, are generally based on message communications. The execution of a process is blocked until receives response from an other for requested message. In this paper, we propose two real-time scheduling methods tasks with blocking intervals. It proven that every task set schedulable by Ming's method also one proposed methods. Also, simulation shows ratios sets much higher than obtained method.
Recent advances in nanostructure-based biotechnology have resulted a growing demand for vertical nanostructure substrates with elaborate control over the nanoscale geometry and high-throughput preparation. In this work, we report fabrication of non-periodic silicon nanocolumn via polyelectrolyte multilayer-enabled randomized nanosphere lithography. Owing to layer-by-layer deposited adhesives, uniformly-separated polystyrene nanospheres were securely attached on large utilized as masks...
In this paper, we propose a high-durability X-band patch antenna with coplanar waveguide (CPW) feeding network that can directly connect the upper and lower transmitting receiver modules without additional cabling. To improve durability of antenna, both sub miniature push-on (SMP) connector feed-pin are separated through CPW layer. This structure minimize deterioration performance when unwanted movement SMP occurs from external shocks. verify design feasibility, reflection coefficient...
Commercial welding filler wires have less strength than hot-press-forming (HPF) steels. As the 2.0 GPa-HPF steel sheets been released, their lap characteristics were investigated using gas metal arc in this study. The base was 1.1 mm-thick sheets, and three considered study (W540, W920, W980) had tensile strengths of 540, 920, 980 MPa, respectively. Gas performed under a controlled short-circuit mode, wire feed speed (WFS) selected as process parameter. Tensile-shear test microscopy to...