Abstract: This special issue addresses to a large extent the challenges and opportunities in GaN and ZnO devices and materials deemed critical to both the GaN- and ZnO-based technologies. There are ...

Junk is accumulating in space at a fantastic pace, with millions of pieces orbiting the Earth, and humans need to figure out a way to deal with it.

Gina Anderson’s junk journal is full of collaged spreads of pictures and papers from vacations with friends, daily mementos ...

Most people crumple them up and toss them in the trash without a second thought. Yet some of those faded store receipts sitting in your junk drawer might actually be tiny goldmines waiting to be ...