Countries: It is used in following countries: Canada, Mexico, United States.
Edge modes, degeneracies, and topological numbers in non-Hermitian systems.
What is—and what is not—an optical isolator.
Modal Analysis of a Planar Waveguide with Gain and Losses.
Time in this zone is based on the mean solar time of the 120th meridian west of the Greenwich Observatory.
Generally, a time change of 1 hour is required with each 15° change of longitude, but this does not necessarily always happen.