The earliest evidence of celestial timekeeping is a flat bone from the Dordogne, carved about 30,000 years ago with crescents and circles at what look like systematic intervals that correspond with the phases of the moon.
Seasonality represents trend that repeats itself in systematic intervals over time.
The sample list was developed by using a systematic sampling interval plan of recording addresses for every other household on every street within the defined boundaries.
Using a list of all EAs within each state obtained from the Nigerian National Population Commission, 60 clusters per state were selected in systematic (equal interval) fashion with a random start.
The survey started at a central point and used a systematic sampling interval (four or five) to identify the private sector sampling points for inclusion if they were on the census list.
Studies to date, however, have not been based on mutation carriers undergoing active, systematic, routine-interval GI surveillance.
The fractional interval systematic sample selection procedure was used in the systematic selection of the branches because it ensures the equal probability of selection for all the branches (Temesgen et al. 2011).
Twelve (12) camp leaders were chosen using a systematic sampling (sampling interval of 13) to give us a sample size of about 8% of camps.
However, the systematic design of interval type-2 fuzzy controllers is still a challenging problem due to the difficulty in determining the parameters of the IT2-FSs.
