Abstract: We describe an evaluation of photoplethysmography (PPG) signals with two wavelengths channels (infrared and red) using a wrist-worn sensor for the estimation of heart rate variability (HRV) ...
Did you know that that 50 percent of women in the U.S. age 50 or older will break a bone due to osteoporosis? Overall, about 54 million Americans have osteoporosis—a gradual thinning out of the ...
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