Abstract: Photoplethysmography (PPG) is a simple method to measure various physiological indices, including heart rate (HR). To prevent motion artifacts, the optimal light wavelength for PPG ...

The Hartman Rock Garden, one of Springfield’s most unique attractions, will offer new free docent-led tours in October. The tours will give visitors the chance to tour the more than 250 sculptures ...

Desidiya® Bottle Lights with Cork, Mini Copper Wire, 24 LED Battery Operated String Decorative 200cm Fairy Light DIY Festive Decor for Diwali Wedding Party Decoration - Pack of 2 (Warm White) at ...

A new cancer treatment combines LED light and tiny tin flakes to neutralize cancer cells while shielding healthy cells and avoiding the painful side effects associated with chemotherapy and other ...