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  2. Turing pattern - Wikipedia

    en.wikipedia.org/wiki/Turing_pattern

    Three examples of Turing patterns Six stable states from Turing equations, the last one forms Turing patterns. The Turing pattern is a concept introduced by English mathematician Alan Turing in a 1952 paper titled "The Chemical Basis of Morphogenesis" which describes how patterns in nature, such as stripes and spots, can arise naturally and autonomously from a homogeneous, uniform state.

  3. Viable system theory - Wikipedia

    en.wikipedia.org/wiki/Viable_system_theory

    (a) patterns of self-organisation that lead to self-organisation through morphogenesis and complexity; (b) patterns for long term evolution towards autonomy; (c) patterns that lead to the functioning of viable systems. This theory was intended to embrace the dynamics of dissipative systems using three planes. Plane of energy. Plane of information.

  4. Breakage-fusion-bridge cycle - Wikipedia

    en.wikipedia.org/wiki/Breakage-fusion-bridge_cycle

    Cytological markers of BFB-cycle-mediated chromosomal instability: "budding" nuclei (A, C, D) and partly fragmented nucleus with double nucleoplasmic bridge (B). [ 1 ] Breakage-fusion-bridge (BFB) cycle (also breakage-rejoining-bridge cycle ) is a mechanism of chromosomal instability , discovered by Barbara McClintock in the late 1930s.

  5. Pattern formation - Wikipedia

    en.wikipedia.org/wiki/Pattern_formation

    The science of pattern formation deals with the visible, (statistically) orderly outcomes of self-organization and the common principles behind similar patterns in nature. In developmental biology , pattern formation refers to the generation of complex organizations of cell fates in space and time.

  6. Punctuated equilibrium - Wikipedia

    en.wikipedia.org/wiki/Punctuated_equilibrium

    In evolutionary biology, punctuated equilibrium (also called punctuated equilibria) is a theory that proposes that once a species appears in the fossil record, the population will become stable, showing little evolutionary change for most of its geological history. [1]

  7. The Structure of Evolutionary Theory - Wikipedia

    en.wikipedia.org/wiki/The_Structure_of...

    The first is a historical study of classical evolutionary thought, drawing extensively upon primary documents; the second is a constructive critique of the modern synthesis, and presents a case for an interpretation of biological evolution based largely on hierarchical selection, and the theory of punctuated equilibrium (developed by Niles ...

  8. 5 Items From the 1970s That Are Worth a Lot of Money - AOL

    www.aol.com/5-items-1970s-worth-lot-170007423.html

    Technically, anything over 20 years old can be coined “vintage.”But when you truly think of items worth this title, your brain doesn’t go to Beanie Babies.

  9. Modulational instability - Wikipedia

    en.wikipedia.org/wiki/Modulational_instability

    In the fields of nonlinear optics and fluid dynamics, modulational instability or sideband instability is a phenomenon whereby deviations from a periodic waveform are reinforced by nonlinearity, leading to the generation of spectral-sidebands and the eventual breakup of the waveform into a train of pulses.