This paper establishes an instantaneous voltage model to illustrate the dynamic characteristics of grid voltage in electromagnetic time scale affected by power-electronic interfaced voltage regulatory ...

In the remote reaches of Arizona s Petrified Forest National Park, scientists have unearthed North America's oldest known pterosaur a small, gull-sized flier that once soared above Triassic ecosystems ...

A moderately strong, 5.7-magnitude earthquake struck in Guatemala on Tuesday, according to the United States Geological ...

This method allows a quantitative characterization of micrometer-scale corrosion damage on metal plates. First, the time-frequency distributions of the damage and baseline Lamb wave signals are ...