Multicomponent cyclicity in influenza (flu) incidence had been observed in various countries (e.g. periods T = 1, 2–3, 5–6, 8·0, 10·6–11·3, 13, 18–19 years) and its close similarity with cycles in ...

New research published in the journal Geoscience Frontiers highlights the cyclic patterns of geologic activity on Earth. Scientists from New York University report findings from an analysis of major ...

THERE are natural phenomena which, without being purely periodical in character, show cyclic variations with maxima of different height, minima of different depth and varying intervals between ...