i want to say that this is called value but I'm not very sure about this answer.
Answer: well here is three steps to calm down well some people dont calm down there in a hurry
1. drink some water
2.tell your self your fine / everything is fine.
3.be yurslef and also if your mad write all ur thought down in ur diary / any journal.
Syncopation is a term in music for a stress on a usually unstressed beat.
Music genres that use this are reggae, blues, dubstep, rap etc.
Hope this helps!!