Elon Musk’s pitch is seductively simple: instead of choking on traffic at street level, cities could slip cars into sleek ...

Images of plants painted on pottery made up to 8,000 years ago may be the earliest example of humans’ mathematical thought, a ...

3D has been incredibly useful in all of my concept art and matte painting work in animation, games and movies. Knowing how to ...

Abstract: The basics of the theory of radio engineering systems for radio image phantomization (addition of non-existent elements) formed by synthetic aperture radars of space carriers are proposed ...

Can you chip in? As an independent nonprofit, the Internet Archive is fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, ...

Abstract: This paper attempts to present a survey on techniques for beam scanning with circularly-polarized reflector antennas, concentrating on the ones that keep each reflector antenna element ...