R. Cottam

Vrije Universiteit Brussel, Bruxelles, Brussels Capital, Belgium

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Publications (5)3.52 Total impact

  • Source
    Ron Cottam · Willy Ranson · Roger Vounckx
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    ABSTRACT: Natural systems are characterized more by the way they change than by their appearance at any one moment in time. There is, however, no self-consistent theory capable of ascribing the development of living hierarchical organisms to conventional scientific rationality. We have derived a generic model for the dynamics and evolution of natural hierarchical systems. We present the resultant birational dynamics which may be attributed to a real hierarchy. We describe the nature of self-organization and of emergence in hierarchies, and the rationality which may be employed to move between scalar levels. We propose the use of diffusely-rational recursive Dempster-Shafer-probability to model inter-hierarchical-level complex regions, and consider its implications. The evolution of living from nonliving systems is attributed to a change in the style of emergence which characterizes the appearance of new scalar levels.
    Integration of Knowledge Intensive Multi-Agent Systems, 2003. International Conference on; 01/2003
  • R. Cottam · W. Ranson · R. Vounckx
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    ABSTRACT: The control of autonomous systems requires provision of at least a synthetic form of intelligence or sapience. While descriptions of these are common, there is no current model which relates their definitions to the structure of an information processing system. We have constructed a self-consistent birational general model of a hierarchical system, and associated data, information, understanding and sapience with aspects of its constitution. We describe the general hierarchical model and its characteristics relevant to sapient control. We associate data with single scalar levels of the hierarchy, information with birational level pairs, understanding with the integration of three adjacent levels, and sapience with the overall integration of the entire system.
    Integration of Knowledge Intensive Multi-Agent Systems, 2003. International Conference on; 01/2003
  • R. Cottam · W. Ranson · R. Vounckx
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    ABSTRACT: An experimental study of diffraction gratings reactive ion etched in germanium is performed. Gratings are designed for the 10.6 mu m infrared CO2 laser. Different etchants have been compared to pattern 3-mu m-deep grooves in the germanium layers evaporated on a GaAs substrate. The experimental diffraction efficiency (maximum 30%) of the prototype gratings are in good accordance with the theoretical predictions, The U-shaped grooves have still to be further optimized. (C) 1996 American Institute of Physics.
    Applied Physics Letters 12/1996; 69(23):3453-3455. DOI:10.1063/1.117249 · 3.52 Impact Factor
  • R. Cottam · W. Ranson · R. Vounckx