The phrase "a periodic activity" is correct and usable in written English.
It can be used to describe an action or task that occurs at regular intervals.
Example: "The team engages in a periodic activity of reviewing their progress every month to ensure they are on track with their goals."
Alternatives: "a recurring task" or "a regular event."
When institutions are internally motivated to learn about student learning, assessment moves beyond a periodic activity to an organic and systematic cycle of inquiry involving a shared commitment among faculty, staff, and administrators.
Other CPGs, like those responsible for locomotion [5], are triggered by signals coming from the environment, and are then able to sustain a periodic activity without further inputs [6].
A periodic activity review (PAR) tool will be used to provide a mapping of how resources are combined to produce integrated HIV and SRH services in each study facility at baseline.
However, although necessary, energy-dependence is not sufficient for a periodic activity and is not the sole factor influencing the extent of this phenomenon (cf Additional file 1, §3.2).
Away from this unrealistic case, when the whole set of kinetic constants of the promoter-state graph contains directed cycles with heterogeneous transitions, alternative pathways (of various length and duration) and includes backward, incoming and outgoing transitions then the system can still demonstrate a periodic activity (ie. non-real eigenvalues).
Remarkably, a strongly periodic activity that demonstrates a complex TF concentration-dependent control is obtained when molecular interactions have typical characteristics observed on eukaryotic promoters (high mobility, functional redundancy, many alternate states/pathways).
The most central members of the population with respect to physical contacts, interact with others in a regular manner: they are most active during official schedule of a week (working hours) and follow a rather periodic activity pattern.
In addition, female mutPOLG Tg mice show a robust periodic activity pattern associated with the estrous cycle.
On the other hand, a very random transition graph can demonstrate complex trajectories of eigenvalues but lacks of a coherent periodic activity (eg. figure 5D1).
As a consequence, the periodic activity fluctuation of some CCRTFs may be perturbed and can not be detected.
The I-TevI fragments consisting of residues 1 169 (N169) and 1 184 (D184) displayed high activity in the context of the T120 or V152 PthXo1 N-terminal fusion points, and both of these fusions also exhibited a 10-bp periodic activity on substrates with varying length spacers.
