Eye-tracking system uses ordinary cellphone camera

For the past 40 years, eye-tracking technology—which can determine where in a visual scene people are directing their gaze—has been widely used in psychological experiments and marketing research, but it's required pricey ...

Inspired by art, lightweight solar cells track the sun

Solar cells capture up to 40 percent more energy when they can track the sun across the sky, but conventional, motorized trackers are too heavy and bulky for pitched rooftops and vehicle surfaces.

Polymer mold makes perfect silicon nanostructures

Using molds to shape things is as old as humanity. In the Bronze Age, the copper-tin alloy was melted and cast into weapons in ceramic molds. Today, injection and extrusion molding shape hot liquids into everything from car ...

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