A5003934449- Muscle activation and electromyography studies
- Lower Extremity Biomechanics and Pathologies
- Laser Design and Applications
- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Photonic Crystal and Fiber Optics
- Prosthetics and Rehabilitation Robotics
- EEG and Brain-Computer Interfaces
- Antiplatelet Therapy and Cardiovascular Diseases
- Laser-Matter Interactions and Applications
- Balance, Gait, and Falls Prevention
- Sports Performance and Training
- Advanced Fiber Optic Sensors
- Knee injuries and reconstruction techniques
- Winter Sports Injuries and Performance
- Advanced Sensor and Energy Harvesting Materials
- Neuroscience and Neural Engineering
- Manufacturing Process and Optimization
- Advanced Numerical Analysis Techniques
- Total Knee Arthroplasty Outcomes
- Coronary Interventions and Diagnostics
- Ergonomics and Musculoskeletal Disorders
- Laser Material Processing Techniques
- Ergonomics and Human Factors
- Effects of Vibration on Health
Hyundai Motors (South Korea)
2025
Chung-Ang University
2025
Imperial College London
2020-2023
Chung-Ang University Hospital
2022
AnyBody Technology (Denmark)
2014-2019
University of Seoul
2012-2017
Gwangju Institute of Science and Technology
2016
Seoul National University
2005-2014
Korea Institute of Science and Technology
2014
CEA Cadarache
2003
Objectives The aim of the current study was to analyse effects posterior cruciate ligament (PCL) deficiency on forces posterolateral corner structure and tibiofemoral (TF) patellofemoral (PF) contact force under dynamic-loading conditions. Methods A subject-specific knee model validated using a passive flexion experiment, electromyography data, muscle activation, previous experimental studies. simulation performed musculoskeletal models with without PCL novel force-dependent kinematics...
An all-fiber-integrated, Q-switched thulium-doped fiber laser based on carbon nanotube (CNT) evanescent field interaction is experimentally demonstrated. It shown that a saturable absorber CNT-deposited D-shaped can readily be incorporated into ring cavity for passive Q-switching operation at wavelength of ∼ 1.89 μm. Using the scheme stable pulses with temporal width 7.155 μs could obtained repetition rate 14.18 kHz. The stability output was also investigated.
This study proposes and clinically tests intramuscular electrical stimulation below motor threshold to achieve prolonged reduction of wrist flexion/extension tremor in Essential Tremor (ET) patients. The developed system consisted an thin-film electrode structure that included both electromyography (EMG) recording electrodes, a control algorithm for the timing based on EMG (closed-loop stimulation). Data were recorded from nine ET patients with recruited Gregorio Marañón Hospital (Madrid,...
Surface EMG-driven modelling has been proposed as a means to control assistive devices by estimating joint torques. Implanted EMG sensors have several advantages over wearable but provide more localized information on muscle activity, which may impact torque estimates. Here, we tested and compared the use of surface intramuscular measurements for estimation required torques using driven modelling.Four healthy subjects three incomplete spinal cord injury (SCI) patients performed walking...
It is becoming a common trend that many designers work on very complex assembly together in collaborative environment. In this environment, every designer should be able to see the whole full detail or rough shape at least. Even though hardware technology being improved rapidly, it difficult display speed allow smooth interactions for designers. This problem could solved if manipulate his portion of resolution while remaining displayed resolution. also desired converted when needed. To...
Posterolateral corner (PLC) structures of the knee joint comprise complex anatomical soft tissues that support static and dynamic functional movements knee. Most previous studies analyzed posterolateral stability in vitro under loading conditions. This study aimed to evaluate contributions lateral (fibular) collateral ligament (LCL), popliteofibular (PFL), popliteus tendon (PT) cruciate forces simulated conditions by using selective individual resection. We combined medical imaging motion...
Inverse dynamic analysis using musculoskeletal modeling is a powerful tool, which utilized in range of applications to estimate forces ligaments, muscles, and joints, non-invasively. To date, the conventional input used this derived from optical motion capture (OMC) force plate (FP) systems, restrict application models gait laboratories. address problem, we propose model, capable estimating internal based solely on inertial (IMC) ground reaction moment (GRF&M) prediction method. We...
A self-Q-switched bismuth-doped germanosilicate fiber laser operating at 1463 nm is demonstrated. This letter experimentally shows that stable Q-switched pulses with a temporal width of ~1.8 μs repetition rate ~65 kHz can be obtained from simple, all-fiberized Fabry–Perot-type cavity without using saturable absorber. The tuning capability the characteristics output depending on pump power also investigated.
A bismuth-doped germanosilicate fiber laser was experimentally demonstrated to engage in self-Q-switched mode-locking at a wavelength of 1470 nm. Mode-locked pulse bursts were generated from ring cavity without using saturable absorber when the length properly adjusted. At 65 m, repetition rates ~31.5 kHz and ~3.088 MHz temporal widths ~4.7 μs ~1.2 ns measured for Q-switching envelopes mode-locked pulses under envelopes, respectively. The operating regime observed change Q-switched as...
In this paper, we propose a three-dimensional design and evaluation framework process based on probabilistic-based motion synthesis algorithm biomechanical analysis system for the of Smith machine squat training programs. Moreover, implemented prototype to validate proposed framework. The consists an integrated human-machine-environment model as well system. process, created in which interactions between human body or ground are modeled joints with constraints at contact points. Next,...
ABSTRACT The posterolateral corner (PLC) structures including the popliteofibular ligament (PFL), popliteus tendon (PT) and lateral collateral (LCL) are important soft tissues for posterior translational, external rotational, varus angulation knee joint instabilities. purpose of this study was to determine effects deficient PLC on kinematics under gait squat loading conditions. We developed subject‐specific computational models with full 12‐degree‐of‐freedom tibiofemoral patellofemoral...
Spinal Cord Injury (SCI) affects thousands of people worldwide every year. SCI patients have disrupted muscle recruitment and are more predisposed to other complications. To recover or enhance lower limbs functions, conventional rehabilitation programs typically used. More recently, been combined with robot-assisted training. Electromyography (EMG) activity is generally used record the electrical muscles, which in turn can be control robotic assistive devices as orthoses, prostheses...
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To improve intuitive control and reduce training time for active upper limb prostheses, we developed a myocontrol system 3 degrees of freedom (DoFs) the hand wrist. In an offline study, systematically investigated movement sets used to train this system, identify optimal compromise between performance. High-density surface electromyography (HDsEMG) optical marker motion capture were recorded concurrently from lower arms 8 subjects performing series wrist movements activating DoFs...
The objective clinical evaluation of user's capabilities to handle their prosthesis is done using various tests which primarily focus on the task completion speed and do not explicitly account for potential presence compensatory motions. Given that excessive body compensation a common indicator inadequate control, include subjective observations quality performed motions have been introduced. However, these metrics are then influenced by examiner's opinions, skills, training making them...