In 490 BC, the Persian Army landed on the plain of Marathon, 25 miles from Athens. The Athenians sent a messenger named Feidipides to Sparta to ask for help. He ran the 150 miles in two days. The ...

Abstract: We simulate Dual-band in an Erbium-doped fiber laser cavity composed of graphene as a saturable absorber. The simulation shows a high dependence on the pulse's central wavelength generated ...

We have tried and tested dozens of fitness trackers, smartwatches and smart rings — these are the top 12 wearables that should land in your cart this January. When you purchase through links on our ...