Abstract: Camera-based contactless monitoring of vital signs, also known as imaging photoplethysmography (iPPG), has seen applications in driver-monitoring, perfusion assessment, affective computing, ...

Abstract: Grating interferometers have been extensively adopted in modern precision manufacturing industries. Diffraction grat-ings are the core components of grating interferometric displace-ment ...

Americans who spend at least five hours a day on social media are more likely to feel heard, but also more open to political violence and less supportive of democracy, according to a major new poll ...