The aspen tree (Populus tremuloides) is the most widely distributed tree species in North America, ranging from Alaska to Newfoundland and down the Rocky Mountains to Mexico. Utah and Colorado ...

Abstract: A novel photonic approach to generating a precisely $\pi$ phase-shifted binary phase-coded microwave waveform with ultra-wide frequency tunable range is proposed and experimentally ...

As an example, on May 6, 2010, the Dow Jones Industrial Average (DJIA) suffered what was then its largest intraday point drop, declining 1,000 points and dropping 10% in just 20 minutes before ...