Jeff Ding developed Ultrasonic Stir Welding (USW) to join large pieces of very high‑strength metals, such as titanium and Inconel. The solid-state weld process improves the current Thermal Stir Welding process by adding high-power ultrasonic (HPU) energy at 20 kHz...

Lawrence Livermore National Laboratory researchers have developed an efficient method to measure residual stress in metal parts produced by powder-bed fusion additive manufacturing (AM).The 3D-printing process produces metal parts layer by layer using a high-energy laser beam to fuse metal powder...

An ultra-high-resolution NASA computer model has given scientists a stunning new look at how carbon dioxide in the atmosphere travels around the globe.Plumes of carbon dioxide in the simulation swirl and shift as winds disperse the greenhouse gas away from its sources. The simulation also...

This week's Question: The Philae spacecraft successfully landed on a moving comet last week. Scientists hope to be able to study the material beneath the surface of the solar body, which is traveling through space at 41,000 mph, hundreds of millions of miles away...

University of Washington electrical engineers have developed a way to automatically track people across moving and still cameras by using an algorithm that trains the networked cameras to learn one another’s differences. The cameras first identify a person in a video frame, then follow that same person...