Photonic crystals are periodic optical structures that can control the flow of light. Multiple reflections from surfaces separated by a distance similar to the wavelength prevent an optical beam from ...

The most important variables are structural, not cultural. by Safi Bahcall When I first became a CEO, at age 33, I read everything I could find about legendary business leaders and the companies they ...

With more than a decade of experience, Nelson covers Apple and Google and writes about iPhone and Android features, privacy and security settings, and more. From ordering an Uber to managing your ...