Yeon-Sun Choi
A5072696819- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Railway Engineering and Dynamics
- Tribology and Lubrication Engineering
- Vibration and Dynamic Analysis
- Engineering Applied Research
- Cosmology and Gravitation Theories
- Magnetic Bearings and Levitation Dynamics
- Civil and Geotechnical Engineering Research
- Brake Systems and Friction Analysis
- Smart Materials for Construction
- Advanced Sensor and Energy Harvesting Materials
- Structural Health Monitoring Techniques
- Gear and Bearing Dynamics Analysis
- Railway Systems and Energy Efficiency
- Mechanical Engineering and Vibrations Research
- Bladed Disk Vibration Dynamics
- Hydraulic and Pneumatic Systems
- Carbon Nanotubes in Composites
- Machine Fault Diagnosis Techniques
- Soil Mechanics and Vehicle Dynamics
- Structural Engineering and Vibration Analysis
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
Sungkyunkwan University
2012-2024
Institute for Basic Science
2024
Samsung Medical Center
2017
A. Alikhanyan National Laboratory
2016
UCLouvain
2011
Texas A&M University
1987-1991
Abstract The need for the development of soft materials capable stably adhering to nerve tissues without any suturing followed by additional damages is at fore a time when success in postoperative recovery depends largely on surgical experience and/or specialized microsuturing skills surgeon. Despite fully recognizing such prerequisite conditions, designing with robust adhesion wet nerves as well acute/chronic anti‐inflammation remains be resolved. Herein, sticky and strain‐gradient...
Implantable electronics have recently been attracting attention because of the promising advances in personalized healthcare. They can be used to diagnose and treat chronic diseases by monitoring applying bioelectrical signals various organs. However, there are challenges regarding rigidity hardness typical electronic devices that trigger inflammatory reactions tissues. In an effort improve physicochemical properties conventional implantable electronics, soft hydrogel-based platforms emerged...
A numerical method is presented to determine the steady-state nonlinear response of a rotor-support system due deadband and rubbing using discrete Fourier transformation inverse transformation. Damaging subharmonic superharmonic responses are found occur in presence side force. The calculated results agree with general trends which have been observed experimentally by other investigators. effects selected nondimensionalized parameters on rotor studied.
Strain-tolerant reversible adhesion under harsh mechanical deformation is important for realizing long-lasting polymeric adhesives. Despite recent advances, cohesive failure within adhesives remains a critical problem that must be solved to achieve robust against humidity, heat, and stress. Here, we report molecular rationale designing an instantaneous adhesive with high strain tolerance (termed as iPASTE) even in stretchable human–machine interface. The iPASTE consists of two biocompatible...
We report on a study of three-body charmless decays B+→K+h+h− based 29.1fb−1 data sample collected with the Belle detector. With no assumptions intermediate mechanisms, following branching fractions have been measured for first time: B(B+→K+π−π+)=(55.6±5.8±7.7)×10−6 and B(B+→K+K−K+)=(35.3±3.7±4.5)×10−6. present observation decay B+→f0(980)K+ fraction product B(B+→f0(980)K+)×B(f0(980)→π+π−)=(9.6+2.5+1.5+3.4−2.3−1.5−0.8)×10−6. This is reported example B meson to scalar pseudoscalar final...
<b><i>Background:</i></b> Successful adaptation of refugees to a new society can be hindered by traumatic experiences and psychiatric symptoms. This study aims examine the relationship between trauma, symptoms life satisfaction North Korean resettled in South Korea. <b><i>Methods:</i></b> A total 211 living Korea completed series questionnaires on history their previous experiences, Korea, depression, anxiety, somatization post-traumatic stress...
We present a measurement of $CP$ asymmetry using time-dependent Dalitz plot analysis ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ decays based on $414\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample containing $449\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs. The was collected the $\ensuremath{\Upsilon}(4S)$ resonance with Belle detector at KEKB asymmetric energy ${e}^{+}{e}^{\ensuremath{-}}$...
We present a nanocomposite strain sensor (NCSS) to develop novel structural health monitoring (SHM) that can be easily installed in composite structure. An NCSS made of multi-walled carbon nanotubes (MWCNT)/epoxy was on target structure with facile processing. attempted evaluate the sensing characteristics and benchmark compared those conventional foil gauge. The response fairly good result nearly identical A neuron, which is biomimetic long continuous NCSS, also developed, its vibration...
For recently devised wound-healing materials, a variety of acute application systems with sustainable therapeutic effects on wound sites have been suggested. example, hydrogel-type healing agents porous structures and high drug encapsulation efficiencies developed for repair. However, challenges remain about the poor mechanical adhesive properties hydrogels. Herein, we propose punicalagin (PC)-containing hydrogel in form that is mechanically stable has efficiency. The APC hydrogel, composed...
Using a sample of 152 x 10(6) BB pairs accumulated with the Belle detector at KEKB e+e- collider, we study decay mechanism three-body charmed B- --> Lambdac+ ppi-. The intermediate two-body B--->Sigmac (2455)0 p is observed for first time branching fraction (3.7 +/- 0.7 0.4 1.0) 10(-5) and statistical significance 8.4sigma. We also observe low-mass enhancement in (Lambdac+p) system, which can be parametrized as Breit-Wigner function mass (3.35(-0.02)(+0.01) +/-0.02) GeV/c2 width...
A search for mixing in the neutral $D$ meson system has been performed using semileptonic ${D}^{0}\ensuremath{\rightarrow}{K}^{(*)\ensuremath{-}}{e}^{+}\ensuremath{\nu}$ decays. Neutral mesons from ${D}^{*+}\ensuremath{\rightarrow}{D}^{0}{\ensuremath{\pi}}^{+}$ decays are used; flavor at production is tagged by charge of slow pion. The measurement $253\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data recorded Belle detector. From yield right-sign and wrong-sign arising nonmixed mixed events,...
A bstract We search for CP violation in the decay ${D^{+}}\to K_S^0{K^{+}}$ using a data sample with an integrated luminosity of 977 fb −1 collected Belle detector at KEKB e + − asymmetric-energy collider. No has been observed and asymmetry is measured to be (−0.25 ± 0.28 0.14)%, which most sensitive measurement date. After subtracting due ${K^0}-{{\overline{K}}^0}$ mixing, {{\overline{K}}^0}{K^{+}}$ found (+0.08 0.14)%.
Using a sample of $31.3\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs collected with the Belle detector at $\ensuremath{\Upsilon}(4S)$ resonance, we make first observation charged $B$ meson decay to ${\ensuremath{\chi}}_{c0}$ and kaon. The measured branching fraction is...
The bulk piezoresistivity of carbon nanotube (CNT) in polymer matrix was discussed to develop a strain sensor for engineering applications. improves interfacial bonding between the nanotubes and CNT composite that enhances transfer, repeatability, linearity sensor. largest contribution may come from slippage overlaying or bundled matrix, macroscopic point view. Nano interfaces CNTs also contribute linear response compared other micro size filler. had low bandwidth adequate sensitivity....
This paper presents a new approach for modeling flexure-pivot journal bearings (FPJB) employing three-dimensional (3D) elasto-hydro-dynamic (EHD) lubrication model. The finite element (FE) method is adopted an analysis of the (1) pad-pivot dynamic behavior and (2) fluid force. isoviscosity Reynolds equation utilized to calculate force acting on pad bearing spinning journal. Computational efficiency achieved utilizing modal coordinate transformation flexible analysis. Fluid film thickness...