By cjbrown8<img width="452" height="254" src="https://ece.ncsu.edu/wp-content/uploads/2016/11/18-452x254.jpg" class="attachment-large size-large wp-post-image" alt="" loading="lazy">Researchers from North Carolina State University's Department of Electrical & Computer Engineering have developed an energy-efficient technique for accurately tracking a user's physical activity based on data from wearable devices.