Both the Oregonator (the model of the mechanism of an actual chemical system) and also the Brusselator (an abstract scheme which lends itself to study and simulation) have the important feature that they give rise to true limit cycles. (religion-online.org)
Background warming and natural cycles could push warming beyond 1.5 C, within a decade of nations agreeing to try and keep it below that limit (climatechangenews.com)
Limit cycle frequencies in oscillatory systems in biology may form templates in which forms can be fixed in structures which provide instructions for the next stage. (religion-online.org)