During femtosecond laser fabrication, photons are mainly absorbed by electrons, and the subsequent energy transfer from electrons to ions is of picosecond order. Hence, lattice motion is negligible ...

We are all familiar enough by now with the succession of boards that have come from Raspberry Pi in Cambridge over the years, ...

A quality laser printer delivers unparalleled speed, pristine text, and reliable paper handling. Find the right option for your home or office from our list of tested picks. Most of my current work ...

When the first laser and inkjet printers for PCs arrived in the mid-1980s, they could only print in monochrome, and their respective advantages were obvious. Today, the differences between laser and ...

Since Philadelphia is arranged on a grid system, the mostly one-way roads are easy to navigate. Helpful maps are posted along street corners across the city – watch for the "Walk! Philadelphia" signs ...