A5009370266- Prosthetics and Rehabilitation Robotics
- Advanced Sensor and Energy Harvesting Materials
- Muscle activation and electromyography studies
- Electrowetting and Microfluidic Technologies
- Innovative Microfluidic and Catalytic Techniques Innovation
- Soft Robotics and Applications
- Cyclone Separators and Fluid Dynamics
- Lower Extremity Biomechanics and Pathologies
- Dielectric materials and actuators
- Robotic Mechanisms and Dynamics
- Sports Performance and Training
- Neutrino Physics Research
- Conducting polymers and applications
- Particle Dynamics in Fluid Flows
- Cellular Mechanics and Interactions
- Granular flow and fluidized beds
- Robot Manipulation and Learning
- Advanced Materials and Mechanics
- Cardiovascular and exercise physiology
- Nuclear reactor physics and engineering
- Particle physics theoretical and experimental studies
- Metallurgical Processes and Thermodynamics
- Analytical Chemistry and Sensors
- Balance, Gait, and Falls Prevention
- Molecular Sensors and Ion Detection
Kyungpook National University
2025
Chung-Ang University
2021-2024
Inje University
2023-2024
SK Group (South Korea)
2012-2015
Korea Institute of Science and Technology
2003-2006
Korea University
2005
We present a microfabricated hybrid biopolymer microcantilever, in which the contractile force of self-organized cardiomyocytes can be measured and studied, as prototype for development cell-driven actuators. The microcantilever is made flexible, transparent, biocompatible poly(dimethylsiloxane) substrate, using simple microfabrication technique. Seeding culturing on specific cantilever allows us to perform highly sensitive, quantitative, noninvasive measurement cells real time. motions...
We present the first measurement of missing energy due to nuclear effects in monoenergetic, muon neutrino charged-current interactions on carbon, originating from <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>K</a:mi></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msup><a:mo...
We have proposed a prototype model of walking micro robot using IPMC (Ionic Polymer Metal Composite) actuators. The stiffness actuator is key parameter to implement robot. Therefore, the casting process developed increase by controlling thickness ion-exchange polymer film. fabricating solid film front liquid state difficult since any and handling material are not disclosed has be set trial error. bending characteristics generative tip force under variation length voltage input investigated....
The use of wearable robots to provide walking assistance has rapidly grown over the past decade, with notable advances made in robot design and control methods toward reducing physical effort while performing an activity. reduction mainly been achieved by assisting forward progression sagittal plane. Human gait, however, is a complex movement that combines motions three planes, not only but also transverse frontal planes. In plane, hip joint plays key role including balance. However,...
IPMC (Ionic Polymer Metal Composite) is a promising candidate actuator for bio-related applications mainly due to its biocompatibility, soft properties and operation in wet condition. The widely used commercialized ion-exchange polymer film has limitation thicknesses, but more various thicknesses are required extensive applications. Especially the enhanced force as an actuator, acquisition of thick essential. Various films with thickness 0.4-1.2 mm have been prepared by casting liquid...
In this paper, we present a micro robot using IPMC (Ionic Polymer Metal Composite) actuators. The actuator usually has been fabricated with commercially available ion-exchange polymer the typical thickness of 100-300 /spl mu/m. By casting liquid solution, could increase up to few millimeters. Based on method, achieve that larger stiffness and produces more generative tip force than solid polymer. A ciliary type 8-legged based actuators is constructed. 6.5 cm in length 4.2 width, 1.5 height...
Computational particle fluid dynamics (CPFD) simulation was carried out to analyze flow patterns in order understand the mechanism of deposit formation on cyclone duct during residue fluidized catalytic cracking (RFCC) process. The CPFD based multiphase particle-in-cell (MP-PIC) method, which phase solved by stochastic Lagrangian model and analyzed Eulerian method. In first stage, a low-speed zone at angle 90° (an inlet position 0°) discovered basic design cyclone, this predicted be initial...
This article proposes a new version of variable gravity compensation mechanism (CVGC-II) for mobile manipulation robots, such as manipulators and exoskeletons. CVGC-II, which incorporated an energy-free in smaller design space, exhibited improved performance with wider range torque values. These enhancements were achieved by adopting optimal curved lever hybrid spring system. First, the concept specifications CVGC are described. Next, contribution system to enhancement CVGC-II is explained....
To use poly-N-Isopropylacrylamide (PNIPAAm) as an actuator, we investigated its general characteristics such swelling/deswelling ratio, response time and swelling force. Through out the variation, a change in volume of over 600% PNIPAAm force generation gram order was obtained. Furthermore, measured significant friction caused by phase transition phenomena that is hydrophobic hydrophilic. Surface condition influences can be reversed from to deswelling controlling temperature PNIPAAm. verify...
금속분말을 환원제로 사용하는 시멘테이션에 의하여 자동차 폐촉매의 침출액과 침출잔사의 세척액으로부터 백금족 금속을 환원 석출시켜 회수하는 연구를 수행하였다. 사용한 알루미늄, 마그네슘 그리고 아연이 금속의 미치는 영향을 조사하였으며 알루미늄을 최적 선정하였다. 침출액에 19.3 당량의 첨가하고 <TEX>$50{\sim}60^{\circ}C$</TEX>에서 10분간 시멘테이션을 행하였을 때 백금, 팔라듐, 로듐의 환원석출율은 각각 99.3%, 99.4%, 90.2% 정도 이었다. 또한 세척액에 45 당량 투입한 후 시멘터이션 반응을 통해 팔라륨, 로듐을 97%, 90% 회수할 수 있었다. 회수한 환원석출물의 금속불순물들을 질산침출로 제거함으로써 품위를 약 10% 향상시킬 The recovery of platinum group metals (PGMs) from the leach solution spent auto-catalyst and wash residue was...
As a result of new developments in semiconductor technology, the number pads per unit area is increasing and pad arrays are becoming irregular. Therefore, there an increased need for versatile probe card to address these issues. We developed vertical micro electro mechanical system (MEMS) tip that usable small (approximately 100 µm) two-dimensional array. The main process used produce was wafer bonding, silicon etching by deep reactive ion etcher (RIE) electro-plating. material...
Although exosuits have several advantages compared to exoskeleton type of wearable robots, they limitations, such as bulkiness and low control performance. This study addresses the design evaluation a compact, lightweight, highly responsive actuator be used for exosuits, based on Quasi-Direct Drive (QDD) actuation. The requirements were set actuation system in state-of-the-art exosuit from Harvard University (HE) so that it could an improvement HE. Several concepts comparatively evaluated...
A cost-effective, simple to use, and automated technique that can provide real-time feedback control for droplet generation is required obtain droplets with high-throughput, stability, uniformity. This study introduces a disposable microfluidic device (dDrop-Chip) simultaneously both size production rate in real time. The dDrop-Chip consists of reusable sensing substrate microchannel be assembled using vacuum pressure. It also integrates detector flow sensor on-chip, enabling measurement...
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We present the first measurement of missing energy due to nuclear effects in monoenergetic, muon neutrino charged-current interactions on carbon, originating from $K^+ \rightarrow \mu^+ \nu_\mu$ decay-at-rest ($E_{\nu_\mu}=235.5$ MeV), performed with JSNS$^2$ liquid scintillator based experiment. Towards characterizing interaction, ostensibly $\nu_\mu n \mu^- p$ or $\nu_\mu$$^{12}\mathrm{C}$ $\rightarrow \mu^-$$^{12}\mathrm{N}$, and analogy similar electron scattering measurements, we define...
Wearable robots have been developed to assist the physical performance of humans. Specifically, exosuits attracted attention due their lightweight and soft nature, which facilitate user movement. Although several types force controllers used in exosuits, it is challenging control assistive material's softness. In this study, we propose three methods improve basic controller using an admittance-based controller. method A, cable was controlled according user's thigh motion eliminate delays...