It was in Rome, towards the end of the eighteenth century, one fine evening in May. A child of the poor gathered his companions around him and led them to a statue of Mary, before which a lamp was ...
At close: 2 January at 4:22:17 pm SGT ...
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) ...
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