As a physical panic button, the Silent Beacon acts as your own personal, portable emergency alert device. For instance, it ...
The physical basis of electronic devices and their application in analog and digital systems. Diodes, transistors, LEDs, photodetectors, and lasers are described, and their properties are explored.
Standard body mass index categories were cross-classified with sample tertiles of device-measured total, light-to-vigorous and moderate-to-vigorous physical activity and sedentary time. In five ...