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This paper presents a new classifier called total margin-based adaptive fuzzy support vector machines (TAF-SVM) that deals with several problems that may occur in support vector machines (SVMs) when applied to the face recognition. The proposed TAF-SVM not only solves the overfitting problem resulted from the outlier with the approach of fuzzification of(More)
The purpose was to compare the effect of low- and high-gain visual feedback on ankle movement variability and muscle activation in children and young adults. Six young adults (19.8 ± 0.6 years) and nine children (9.4 ± 1.6 years) traced a sinusoidal target by performing ankle plantar/dorsiflexion movements. The targeted range of motion was 10°, and the(More)
The purpose of this study was to determine whether older adults compared with young adults exhibit impaired end-point accuracy during a two-finger task due to altered activation of the contributing synergistic muscles. Nine young (21.3 years ± 1.6 years, 4 men) and 9 older (73.1 years ± 6.4 years, 5 men) were instructed to accurately match the center of a(More)
Evidence indicates that the frequency-domain characteristics of surface electromyogram (EMG) signals are modulated according to the contributing sources of neural drive. Modulation of inter-muscular EMG synchrony within the Piper frequency band (30–60 Hz) during movement tasks has been linked to drive from the corticospinal tract. However, it is not known(More)
Aging impairs the activation of muscle; however, it remains unclear whether it contributes to deficits in motor learning in older adults. The purpose of this study was to determine whether altered activation of antagonistic muscles in older adults during practice inhibits their ability to transfer a motor task ipsilaterally. Twenty young (25.1 ± 3.9 yr; 10(More)
The quiet stance is a complicated motor act requiring sophisticated sensorimotor integration to balance an artificial inverted pendulum with the ankle musculature. The objective of this study was to characterize the effects of stance pattern (bilateral stance vs. unilateral stance) and directional influence of light finger touch (medial-lateral vs.(More)
The purpose was to compare neuromuscular control of rapid ankle goal-directed movements in healthy preadolescent children and young adults. Ten young adults (20.0 ± 0.9 years) and ten children (9.5 ± 0.7 years) attempted to accurately match the peak displacement of the foot to a spatiotemporal target with an ankle dorsiflexion movement. The targeted(More)
Coverage problem is a fundamental issue in wireless sensor networks. In this paper, we consider two sub-problems: k-coverage rate evaluation and k-coverage rate deployment. The former aims to evaluate the ratio of k-covered area relative to the monitored area, while the latter aims to determine the minimum number of sensors required and their locations to(More)