To produce electricity, thermoelectric materials capture waste heat from sources such as automobile exhausts or industrial processes. Improving the materials' efficiency will require further reduction of thermal conductivity. A new article from a Georgia Institute of Technology professor clarifies...

Researchers at the Massachusetts Institute of Technology discovered that yarn made of niobium nanowires enables more efficient supercapacitors. The new approach uses the yarns as the electrodes in tiny supercapacitors. Adding a coating of a conductive polymer to the yarn further increases the...

A Compensatory Reserve Index (CRI) device developed by Army medical researchers attaches to a soldier's finger and displays vital signs: body temperature, heart rate, breathing rate, and blood pressure. The matchbox-sized tool includes a computer display, wire, and plastic clip.

Any signal can be decomposed into components of sinusoids. This pioneer technique expands the theory of interchangeability of phase and a shift of time (or a shift of another variable). It faithfully preserves phase information by mathematically rearranging the signal’s...