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Between Events P and Q, the proper time is measured in the frame where the time-like vector from P to Q is stationary, thus Δt' in the frame S' is the proper time. And the proper time is shorter than any other time, like Δt measured in the frame S where the time-like vector from P to Q is seen as moving at speed v = 0.5c.
This is the picture where the green horizontal axis is spatial and the green vertical axis is time for the coordinates of the S' frame.
Kenneth gave us an update on where we are at with HTML5, and on why we should drop support for Internet Explorer 8 altogether.
Earth Frame for
sciforums.com/showthread.php?t=107854
A beam of light is fired from Earth at event O and hits the sun at event A.
Events A, B, and C are all at the same time according to Earth.
Events O, E, C, and R happen at Earth.
Javascript Panel with Douglas Crockford, Ryan Seddon, Vim Jobanputra, Kyle Barrow and moderator Matt Vickers at WDCNZ 2012
Photo by WE DO Photography and Design wedo.net.nz