d Fredkin is scanning the visual field systematically. He checks the instrument panel regularly. He is cool, collected, in control. He is the optimally efficient pilot. The plane is a Cessna ...

Qalculate! is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for ...

What would happen to us without our cell phone calculator? We always have it at hand, it's fast and saves us from any trouble. But if we need to do complicated operations, we need a more complete tool ...

College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China ...