A5100777803- Muscle activation and electromyography studies
- Motor Control and Adaptation
- Advanced Vision and Imaging
- Stroke Rehabilitation and Recovery
- Botulinum Toxin and Related Neurological Disorders
- Computer Graphics and Visualization Techniques
- Conflict of Laws and Jurisdiction
- Orthopedic Surgery and Rehabilitation
- Optical measurement and interference techniques
- European and International Contract Law
- Legal principles and applications
- Robotics and Sensor-Based Localization
- Regional Development and Environment
- Computational Fluid Dynamics and Aerodynamics
- Neurological disorders and treatments
- Advanced Biosensing Techniques and Applications
- Microfluidic and Bio-sensing Technologies
- Advanced Image and Video Retrieval Techniques
- 3D Shape Modeling and Analysis
- Cerebral Palsy and Movement Disorders
- Image Enhancement Techniques
- Elbow and Forearm Trauma Treatment
- Shoulder Injury and Treatment
- Image and Object Detection Techniques
- Corporate Finance and Governance
MedStar National Rehabilitation Hospital
2015-2025
University of America
2015-2025
Catholic University of America
2015-2025
Korea Advanced Institute of Science and Technology
2006-2025
National Institutes of Health Clinical Center
2025
Macrogen (South Korea)
2024
Wonkwang University
2024
Jeonbuk National University
2024
Materials Development (United States)
2024
Korea University
2023
In this study, we developed a robust subject-specific electromyography (EMG) pattern classification technique to discriminate intended manual tasks from muscle activation patterns of stroke survivors. These classifications will enable volitional control assistive devices, thereby improving their functionality. Twenty subjects with chronic hemiparesis participated in the study. Subjects were instructed perform six functional while recorded by ten surface electrodes placed on forearm and hand...
Flow cytometry is an indispensable tool in biology for counting and analyzing single cells large heterogeneous populations. However, it predominantly relies on fluorescent labeling to differentiate and, hence, comes with several fundamental drawbacks. Here, we present a high-throughput Raman flow cytometer microfluidic chip that chemically probes live label-free manner. It based rapid-scan Fourier-transform coherent anti-Stokes scattering spectrometer as optical interrogator, enabling us...
Significant functional impairment of the hand is common among stroke survivors and restoration function should be prioritized during post-stroke rehabilitation. The goal this study was to develop a novel biomimetic device assist patients in producing complex movements with limited number actuators. Biomimetic Hand Exoskeleton Device (BiomHED) actuated by exotendons that mimic geometry major tendons hand. Ten unimpaired subjects four chronic participated experiments tested efficacy system....
Methane gas, as one of the major biogases, is a potential source renewable energy for power production. Biochar can be readily used to purify biogas contaminants such H2S and CO2. This study assessed adsorption CH4, H2S, CO2 onto four different types biochars. The dynamics biochars were investigated in fixed-bed column, by determining breakthrough curves capacities physicochemical properties considered justify performance. results showed that CH4 was not adsorbed well subjected whereas...
Biochar has an ability to alter the biological, chemical, and physical properties of soil due its physicochemical such as surface area, porosity, nutrient retention ability, available contents, aromaticity, etc. The present study was designed evaluate impact application rate biochar on hydraulic a sandy loam in short term. produced at 500 °C from dried corn residue (BC500). BC500 incorporated rates 0, 2.5%, 5.0%, 7.5%, 10% (w·w−1) into filled up height 4 cm, cores having 5 cm diameter...
Device configurations that enable a unidirectional propagation of carriers in semiconductor are fundamental components for electronic and optoelectronic applications. To realize such devices, however, it is generally required to have complex processes make p–n or Schottky junctions. Here we report on effect due self-induced compositional variation GaAsSb nanowires (NWs). The individual NWs exhibit highly reproducible rectifying behavior, where the direction determined by NW growth direction....
There are two types of dystonic tremor syndromes (DTS), (DT) and associated with dystonia (TAWD), neither is understood. DTS likely share some mechanisms nontremulous dystonia, there may also be overlaps essential (ET). We studied 21 ET (8 females, 13 males) 22 human patients (10 12 males), including DT (writer's cramp writing tremor) 9 (TAWD; cervical hand tremor). Tremors were analyzed using accelerometry surface EMG the antagonist pairs arm muscles during posture, simple kinetic movement,...
Significant functional impairment of the hand is commonly observed in stroke survivors. Our previous studies suggested that inability to modulate muscle coordination patterns according task requirements may be substantial after stroke, but these limitations have not been examined directly. In this study, we aimed characterize post-stroke ability across tasks and its correlation with impairment. Fourteen survivors, divided into a group severe (8 subjects) moderate (6 their clinical...
Background: Cerebral palsy (CP) often affects function of one or both arms. Resting-state magnetic resonance imaging studies identified abnormal neuronal connectivity related to functional deficits in CP, with few on dynamic, task-related changes connectivity. Here, we compare participants CP and typical development (TD) during an upper limb task relate these motor performance. Methods: Children (n = 15) TD performed a button-press arms, while recording 64-channel electroencephalography....
A direct on-chip transmission measurement of the resonance frequency an individual singly clamped carbon nanofiber relay is reported. The experimental results are in good agreement with a small signal model and show expected tuning changing bias voltage.
This paper presents a three-dimensional modeling approach to simulate the thermal performance of Li-ion battery module for new urban car. A single-battery cell and 52.3 Ah were considered, Newman, Tiedemann, Gu, Kim (NTGK) model was adopted electrochemical based on input parameters from discharge experiment. thermal–electrochemical coupled method established provide insight into temperature variations over time under various conditions. The distribution predicted accurately. Additionally, in...
Understanding the transformation of tendon forces into joint torques would greatly aid in investigation complex temporal and spatial coordination multiple muscles finger movements. In this study, effects posture on force transmission within extensor apparatus were investigated. five cadaver specimens, a constant was applied sequentially to two extrinsic tendons index finger, digitorum communis indicis proprius. The responses loading, i.e., fingertip force/moment regional strains apparatus,...
We propose a branch-and-bound algorithm to obtain the globally optimal relative rotation between camera and sensor attached it. Compared previous methods, our approach directly minimizes image space error related measurements which is very natural for camera-based systems. Our based on observation that we may evaluate residual when matrix known. feasibility test efficiently reduce search volume of domain. Experimental results are provided using synthetic real data sets.
A pilot study was conducted to test the feasibility of using electromyographic signals drive an active orthosis for hand therapy after stroke. Five stroke survivors with chronic hemiparesis completed 18 one-hour training sessions over 6 weeks. Activation patterns a long finger flexor muscle and extensor controlled orthosis, J-Glove, which provided assistance extension facilitate grasp-and-release movements. Initial results showed improvement in performance on one component, lifting can, Wolf...