Nonlinear phenomena are phenomena, which, in contrast to a linear system, cannot be explained by a mathematical relationship of proportionality (that is, a linear relationship between two variables).

RECENT articles in this journal by Mr. R. H. PC Fowler, Prof. M. Born, and Dr. P. Jordan have dealt with the relation between Schrodinger's wave mechanics and the quantum theory, but it is admitted ...

This copy is for your personal, noncommercial use only. New this week by Maggie Haberman and Jonathan Swan Simon & Schuster Audio Two White House correspondents for The New York Times delve into the ...

Just because your business is small doesn't automatically exempt you from federal and state regulations regarding union organization. Small-business managers must use caution when discussing such ...