There has recently been a rapid growth of activity in nonlinear optics. Effects such as frequency doubling, stimulated Raman scattering, phase conjugation and solitons are of great interest both for their fundamental properties and their many important applications in science and engineering. It is [...]

The first decade of the new century proved to be a deadly one for many children and young people in the United States. Despite increased policing on the streets, higher rates of incarceration, harsher sentencing, stricter control of illegal drugs, and attempts to reduce access to firearms, FBI repor[...]