New atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...

IN these days of accurate clocks and watches no one thinks of using a sun dial to tell the time of day. At best such an instrument can be right but four times a year, and in many places it can ...

It says the net force on an object equals its mass (m) times acceleration (a ... a quick look at the Schrödinger equation. The version above is called the time-dependent Schrödinger equation ...

In this scheme spike events carry a floating point offset next to their location on the time grid. Thus, in contrast to an event-driven scheme, the hybrid scheme does not predict future spike times ...