Irregular periods, for example, are common among adolescents, athletes and lactating women.
IP addresses are written as four sets of numbers separated by periods; for example, 204.171.64.2.
There are periods, for example, when members of the female chorus lounge quietly in their dressing room.
They include easily identifiable physical conditions such as spina bifida, club feet or cleft palate; others only become apparent over longer periods, for example heart or eye problems.
Studies of water near universities have found spikes in amphetamine (taken illicitly by many students to enhance their studying) during exam periods, for example.
Symplectic integrators are the most common form of geometric integrator, and are therefore of interest in simulating plasmas for many plasma periods, for example.
In September, the administration said that insurers could establish open-enrollment periods — for example, one month a year — during which they would accept all children.
Another proposal is that, as life-expectancy increases, so should contribution periods; for example, to 41 years by 2012 and to 42 by 2020.
The film calendar can suffer becalmed periods: for example, Don 2 led a very weak field of new releases over Christmas weekend 2011, landing at sixth place and the only new entry in the top 10.
In its new color combinations, it seems to mix well with other periods: for example, in the newly restored 1799 Clifton Inn, in Charlottesville, Va., once the home of Thomas Jefferson's daughter.
Probably, there are other effects which overwhelm this one and would make it difficult or impossible to detect, even over very long time periods -- for example, changes in the Earth's orbit due to perturbations from other planets.
