positive feedback
121Paleocene–Eocene Thermal Maximum — The Paleocene/Eocene boundary, Ma|eocene, was marked by the most rapid and significant climatic disturbance of the Cenozoic Era. A sudden global warming event, leading to the Paleocene Eocene Thermal Maximum (PETM, alternatively nowrap| Eocene… …
122Frequency compensation — In electrical engineering, frequency compensation is a technique used in amplifiers, and especially in amplifiers employing negative feedback. It usually has two primary goals: To avoid the unintentional creation of positive feedback, which will… …
123Iris hypothesis — The iris hypothesis is a theory proposed by Prof. Richard Lindzen in 2001 [ [http://eaps.mit.edu/faculty/lindzen/adinfriris.pdf R.S. Lindzen, M. D. Chou, and A.Y. Hou (2001) Does the Earth have an adaptive infrared iris? Bull. Amer. Met. Soc. 82 …
124System dynamics — [ John Sterman 2001.] System dynamics is an approach to understanding the behaviour of complex systems over time. It deals with internal feedback loops and time delays that affect the behaviour of the entire system. [http://sysdyn.clexchange.org… …
125Relaxation oscillator — A relaxation oscillator is an oscillator in which a capacitor is charged gradually and then discharged rapidly. It is usually implemented with a resistor or current source, a capacitor, and a threshold device such as a neon lamp, diac,… …
126Gaia hypothesis — The study of planetary habitability is partly based upon extrapolation from knowledge of the Earth s conditions, as the Earth is the only planet currently known to harbour life. The Gaia hypothesis, also known as Gaia theory or Gaia principle,… …
127Network motif — Network motifs are connectivity patterns (sub graphs) that occur much more often than they do in random networks. Most networks studied in biology, ecology and other fields have been found to show a small set of network motifs; surprisingly, in… …
128Causality loop — *A temporal causality loop, or predestination paradox, is a theoretical phenomenon, which is said to occur when a chain of cause effect events is circular. For instance, if event A causes event B, and event B causes event C, and event C causes… …
