The effects of nonlinear periodic structures on the temporal behaviour of optical pulses are not well understood, and measurements so far have not taken into account the phase dynamics of the pulse.

With more than 50 million redeemed miles under her belt, Becky Pokora is a rewards travel expert. She's been writing about credit cards and reward travel since 2011 with articles on Forbes Advisor, ...

Clint Proctor is a managing editor with the credit cards and travel rewards team at Forbes Advisor. He has eight years of experience in personal finance journalism and has contributed to a variety of ...

Due to the proprietary methodology and the volume of correspondence we receive, we are unable to respond to questions about the rate index. The following list attempts to answer the most common ...