Is it possible to 3d print a diffraction pattern? The winners and losers of the government shutdown deal Warren Buffett suggests all parents do one thing before they die, whether they have 'modest or ...

Making a perfect lens that produces flawless images has been a dream of lens makers for centuries. In 1873, Ernst Abbe discovered a fundamental 'diffraction limit' in optics: whenever an object is ...

Abstract: Ultrasonic transit time flow meters are promising for fiscal high-precision energy flow rate measurement of natural gas in subsea applications. For accredited operation, improved control ...