Sound and Image Processing with Optical
Bio-Nanocomputers:
Centre for Mathematical Modelling,
School of Mathematical Sciences
Swinburne University of Technology,
Hawthorn, Victoria 3122 Australia
A functional information
processing device using bacterial or fungal cells, Bacillus casei (Shirota strain) or Pycnoporus cinnabarinus grown or applied to the surface of optical
media such as CD or DVD discs causes non-equilibrium error correction during
data translation into images or sounds.š
This can be modeled as a nonlinear feedback system.š Surface colonization is a biotechnique
similar to micro-lithography, and in this context, control over growth
(population dynamics, fractal shape complexity) acts as RULES during data
translation AXIOMS.š Another variation
on this experiment uses colloidal aerosol dispersions as an experimental
example of a nanoscale particle system capable of causing optical feedback in
digital media.š Results for both systems
display a trade-off between strict and weak causality offering micron-level
control over synthesized output. Examples are given for both prokaryotic and
eukaryotic cellular interference with optically stored data.š Differences in cellular parameters such as
organelle density, refractivity, and gross morphology (branching versus
aggregation) are shown to impact on error correction using the Cross
Interleaved Reed-Solomon Code. Growth conditions are given for both types of
micro-organisms, and for the aerosol spray.š
Manipulation of digital media through exploiting sensitive dependence on
initial conditions is one practical way to control variation. Examples are
given that highlight the potential of this nonlinear system for rapid,
real-time synthesis and re-synthesis of image or sound streams for general
design and multimedia applications.
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