Sentence examples for occurrence periodicity from inspiring English sources
Both the reversal of Es migration directions and 8-h Es occurrence periodicity in Fig. 5 suggest that atmospheric tidal winds may govern the occurrence and drifts of Es patches.
The comparison for the period 1100 1330 UT of TEC fluctuations along paths GPS7/KIRU, GPS9/KIRU with magnetic variations at KIR and EISCAT-derived ionospheric density N e in the lower ionosphere, shows the occurrence of persistent periodicity in all these parameters (Fig. 2).
The power spectra were evaluated by the occurrence of the periodicity in 103 random data sets.
More recently a three year study demonstrated the occurrence of annual periodicity in dehydration tolerance of germinated seeds [ 18].
The amplitude and cross-amplitude spectral representation in the time-frequency domain allowed us to detect the occurrence of predominant periodicities and the relationship between the sunspot number and the tree ring time series.
Potential occurrence of spatial periodicities in cortical Tl+-uptake during NREMS and WK was evaluated in unweighted, inverted grayscale images of scanned frontal Sects.
The occurrence of significant higher periodicity modes are dominant in drought years compared to surplus, which also vary with geographical locations.
Spectral analysis confirmed the occurrence of the same periodicity with f ~ 2.4 mHz in variations of the geomagnetic field, TEC (GPS7, GPS9), and EISCAT N e (Pilipenko et al. 2014a, b).
Periodicity in occurrence of magnetic disturbances in polar cap and auroral zone under conditions of steady and powerful solar wind influence on the magnetosphere is analyzed on the example of 9 storm events with distinctly expressed sawtooth substorms (N = 48).
This finding suggests that periodicity of occurrence at relatively regular intervals is not only a common feature of PIDs but that periodicity may result at least in many instances from circumferential multiple propagation of depolarizations around ischaemic core lesions.
b) At the first glance the periodicity of occurrence vs. spacer length on Figure 3, 4, 5 falls close to half of B-DNA periodicity that may be correlated with the sidedness of a recognition site - is the periodicity statistically insignificant?
