Complex bio-system as organizationally closed-loop coding-decoding control system
Dept. Biochemistry and Biophysics VILNIUS UNIVERSITY
Last modified: April 25, 2006
The universal concept of the organized complex and bio-systems constructed on the organizationally closed-loop coding-decoding control (CL-CDC) and matter-energy-information open principles is represented (Fig. 1). According CL-CDC scheme the natural system N of real world sphere may be represented by encoding (coding) procedure on the formal (abstract, mathematical, virtual, computer) world sphere F as model of N. Model or formal system F operates with special rules. Coding should be understood as a reflection of a real system (nature or a technological process) in an abstract virtual form on memory structures (DNA, hormones, neural networks, programs, books, etc.) in such a way, that the re-reflection (decoding) from the abstract to real would be possible. The coding procedure corresponds to observations, measurements, analysis, representations or reflections on memory structures. Accordingly, the decoding procedure is de-reflection or synthesis of natural system N under informational control of model in formal system F. The decoding as informational control accompanies procedures of interpretation, control, prediction, synthesis and anticipation. Phenomenon of informational CL-CD control appeared on the Earth 3-4 billion years ago, when the life originated. Informatics paradigm considers the physical and chemical transformations of energy and matter as flows that are controlled, or as the signals that are means used by purposive informational control programs. The information is born in control systems of organized bio-systems. The organized systems are represented as organizationally closed and mater-energy-information open CL-CDC structures. This look to organized complex systems emerges from concept of modeling relation by R. Rosen and J.L. Casti that was interpreted on base of W. Powers Perceptual Control Theory (PCT). The development of this interpretation is CL-CDC scheme that expresses more general understanding of organized systems. Organizational closeness causes the functional compatibility of coding-decoding and functional sense (semantics) of coded reflections. Informational openness means ability to joint additional information about environment to pool of existing world models (“informational metabolism” in analogy of mater and energy conversion). The matter-energy-information openness permit to synthesize from CL-CDC elements more complex structures having parallel, feedforward, hierarchical and feedback interrelations. The living and social systems are a kind of organized systems, but the class of organized systems includes some systems developed as pure technical systems (e.g., robots).