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Systems

Optical tweezers, shown here trapping a nanoparticle, are among the systems impacted by a type of uncertainty that physicists have long missed. (image: Steven Hoekstra/Wikipedia CC BY-SA 4.0)

Physicists identify overlooked uncertainty in real-world experiments

Categories Physics & Mathematics

A simple version of a Petri net for COVID infection. The starting point is a non-infected person. “S” denotes “susceptible”. Contact with an infected person (“I”) is an event which leads to two persons being infected. Later another event will happen, removing a person from the group of infected. Here, “R” denotes “recovered” which in this context could be either cured or dead. Either outcome would remove the person from the infected group.

COVID calculations spur solution to vexing computer science problem

Categories Health, Physics & Mathematics

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