Definition: An AC motor where the rotor’s speed matches the speed of the rotating magnetic field in the stator. Working principle: The rotor, using permanent magnets or electromagnets, locks in step ...

New research shows that pumping groundwater has resulted in a change to the planet’s tilt and rotation, increasing sea levels too. As Earth moves on a rotational pole, the distribution of water ...

“I'm very glad to find the unexplained cause of the rotation pole drift. On the other hand, as a resident of Earth and a father, I'm concerned and surprised to see that pumping groundwater is ...

“I’m very glad to find the unexplained cause of the rotation pole drift,” Seo said in a statement. “On the other hand, as a resident of Earth and a father, I’m concerned and surprised to ...

Our study shows that among climate-related causes, the redistribution of groundwater actually has the largest impact on the drift of the rotational pole.” Redistributing water from the midlatitudes ...

Without it, the model was off by 78.5 cm (31 inches), or 4.3 cm (1.7 inches) of drift annually. Ki-Weon Seo, a geophysicist at Seoul National University who led the study, said, “I’m very glad to find ...

“I’m very glad to find the unexplained cause of the rotation pole drift,” Seo said in a statement. “On the other hand, as a resident of Earth and a father, I’m concerned and surprised to ...