To perform the test, a prick is made in the inner surface of your dog's lip and a stop watch is used to measure the period of time it takes before the flow of blood from the wound to cease. (2ndchance.info)
By simply measuring the period with which the brightness of a Cepheid rises and falls, the relation can be used to determine its luminosity, the intrinsic brightness of the star. (proftimobrien.com)
Funding for higher education has declined more than 42 percent over the past five years, according to State Higher Education Executive Officers, a nonprofit association that measured a period running from the middle of Crist's term through last year. (cnbc.com)