EMERGENT PROPERTIES 2)
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1. "Properties of a structural level in a hierarchy that cannot be predicted from the properties of the components of the antecedent level (R.F. FOX, 1988, p.171).
2. "a) Properties which emerge as a coarser-grained level of resolution is used by the observer.
b) Properties which are unexpected by the observer because of his incomplete data set, with regard to the phenomenon at hand.
c) Properties which are, in and of themselves, not derivable a priori from the behavior of the parts" (T.F.H. ALLEN & T.B. STARR, 1982, p.267).
A good example of emergent property can be found in a system's autonomy. N. PEGUIRON describes the following very simple situation: "Let us consider an elemental electrical circuit made up from a relay and two switches: the first normally open serves to start the current within the coil of the relay, but it can be seen that this action is conserved when one stops to press the switch; the second one, normally shut, has the opposite effect, but the same property. This very simple circuit presents the property to memorize the last performed commands however this memorization property does not belong to any of the elements. As long as the coils, the contacts and the switches are separately studied, it is not possible to understand, nor to predict the global property of memorization. This property is said to be emergent because it is found neither in the components of the system, nor in their assembled state" (1989, p.9).
It appears only when the system is connected functionally with its environment, the grid.
Numerous other examples of emergent properties can be given, as for example:
- life, in relation to macromolecules
- consciousness as a result of numerous interconnexions between neurons
- a working car, as a meaningful and functional assembly of parts.
Water as a liquid, while its parts, hydrogen and oxygen are both gases in their elemental state
Categories
- 1) General information
- 2) Methodology or model
- 3) Epistemology, ontology and semantics
- 4) Human sciences
- 5) Discipline oriented
Publisher
Bertalanffy Center for the Study of Systems Science(2020).
To cite this page, please use the following information:
Bertalanffy Center for the Study of Systems Science (2020). Title of the entry. In Charles François (Ed.), International Encyclopedia of Systems and Cybernetics (2). Retrieved from www.systemspedia.org/[full/url]
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