Tom Chan, a veteran high school math teacher in California, was suspended after a quiz he gave his ninth-grade students ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Abstract: Accurate prediction of the diurnal variations of very low frequency (VLF) waves in the Earth-ionosphere waveguide is still a challenging task. In this letter, a novel method, which consists ...

Vikki Velasquez is a researcher and writer who has managed, coordinated, and directed various community and nonprofit organizations. She has conducted in-depth research on social and economic issues ...