%0 Journal Article %T Battery-free wearable sensing system enhanced by machine learning for monitoring stress levels %A Pei, Xiaochang %A Ghandehari, Anita %A Rajendran, Jerome %A Chakoma, Shingirirai %A Tavares Negrete, Jorge Alfonso %A Esfandyarpour, Rahim %J Progress in Biomedical Optics and Imaging - Proceedings of SPIE %V 13312 %P 133120E-133120E-6 %@ 1605-7422 %D 2025-03-20 %I SPIE %~ DeepDyve