Norway does. I think it was introduced in the 1990's after Helsinki Accord observers reported the possibility of fraud.
Until then, if you voted early and gave somebody else's name, you could have voted twice.
I don't think this happens often. It would have been included in the report of possible irregularities that is published after each election. I looked through the reports after two or three elections, and never saw reports about this.
I find it weird that English apparently doesn’t have an everyday word for marine bioluminescence. It’s such an academic word. What would traditional sailors and fishermen have called it? In my language (Norwegian) we call it «morild» (sea-fire).
This is true when all network delays between the synchronized device and the time reference are deterministic and accounted for in the configuration.
The design of PTP assumes that this is the case. NTP, on the other hand, estimates the network delays to its time references.
Is there any reason to believe that PTP would be better in normal networks?