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Your search keyword '"Park, Euljoon"' showing total 26 results
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26 results on '"Park, Euljoon"'

7. Adaptive filtering of the electromyographic signal for prosthetic control and force estimation

Author

Park, Euljoon and Meek, Sanford G.

Subjects
Electromyography -- Research, Prosthesis -- Research, Biological sciences, Business, Computers, Health care industry
Abstract

An adaptive time constant filter is derived for electromyographic (EMG) signal processing in prosthetic control applications. The analysis indicates that the mean-squared estimation error can be reduced by varying the time constant of the filter as a function of the signal and its derivative. Results of several experiments indicated this filter provides faster response and smaller estimation error than several previously available filters.

Published
1995

8. Fatigue compensation of the electromyographic signal for prosthetic control and force estimation

Author

Park, Euljoon and Meek, Sanford G.

Subjects
Muscle contraction -- Physiological aspects, Electromyography -- Research, Myoelectric prosthesis -- Models, Biological sciences, Business, Computers, Health care industry
Abstract

During a sustained muscle contraction, the amplitude of electromyographic (EMG) signals increases and the spectrum of the EMG signal shifts toward lower frequencies. These effects are due to muscular fatigue and can cause problems in the control of myoelectric prostheses and in the estimation of contraction level from the EMG signal. It has been well known that the fatigue effects can be explained by the conduction velocity changes during the fatigue process and by the idea that the conduction velocity is linearly proportional to the median frequency of EMG signals. Hence the fatigue process can be monitored by measuring the median frequency. A fatigue compensation preprocessor has been developed. It uses the widely accepted power spectrum density model of EMG signals that contains the conduction velocity as a measure of fatigue. It was verified that the preprocessor scales down the amplitude of the fatigued EMG signal and decompresses the spectrum. Hence, the preprocessor eliminates the increase in amplitude and the shift in frequency and enables consistent EMG signals to be used to control prostheses.

Published
1993

11. Thoracic Spinal Cord Stimulation Improves Cardiac Contractile Function and Myocardial Oxygen Consumption in a Porcine Model of Ischemic Heart Failure

Author

LIU, YUAN, primary, YUE, WEN‐SHENG, additional, LIAO, SONG‐YAN, additional, ZHANG, YUELIN, additional, AU, KA‐WING, additional, SHUTO, CHIKA, additional, HATA, CARY, additional, PARK, EULJOON, additional, CHEN, PETER, additional, SIU, CHUNG‐WAH, additional, and TSE, HUNG‐FAT, additional

Published
2011
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12. AB30-5

Author

Meine, Mathias, primary, Min, Xiaoyi, additional, Paris, Michael, additional, and Park, Euljoon, additional

Published
2006
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21. Activity-Controlled Circadian Base Rate

Author

PARK, EULJOON, primary, WEILENMANN, DANIEL, additional, BLOCH, KONRAD, additional, KUEFFNER, JOSEF, additional, BORNZIN, GENE, additional, CANDINAS, RETO, additional, and LEVINE, PAUL A., additional

Published
1998
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23. Impedance Cardiography for Atrioventricular Interval Optimization During Permanent Left Ventricular Pacing.

Author

TSE, HUNG-FAT, YU, CANNAS, PARK, EULJOON, and LAU, CHU-PAK

Subjects
CARDIOGRAPHY, CARDIAC pacing
Abstract

Presents a study which examined the value of an impedance cardiography-based method of cardiac output measurement to optimize the atrioventricular interval in men and a woman during permanent left ventricular pacing. Methods; Results and discussion.

Published
2003
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