If we record the ground motion at a single location for a range of time, we can measure the time between peaks in the motion, which we call the wave period. Another important term is frequency, which is the inverse of the period, or one divided by the peak-to-peak time between wave crests.
The Universities and Colleges Admissions Service (UCAS) is a UK-based organisation whose main role is to operate the application process for British universities.
Undefinitized Contract Actions (UCA) are those contract actions for which the contract terms, specifications, or price are not agreed upon before performance commences (DFARS 217.7401).