In short, 4D ultrasound imaging is a 3D ultrasound in live motion. 4D ultrasounds utilize either a 2D transducer, which rapidly acquires 20-30 volumes or a matrix array, which instead uses a 3D ...

While 3D printing contains the instructions to print layers of material successively, 4D printing adds a precise geometric code to the process based on the angles and dimensions of the desired shape.

Over the last year we've been telling you lots about 3D printing. Now at the University of Wollongong in Australia, one research group has developed a 4D printing technique. Yes, you heard us ...

Structural relaxation. To demonstrate the differences between glassy dynamics in two and three dimensions, we focus on two closely related glass-forming fluids: the 3D 80:20 binary Lennard–Jones ...