Advances in Physarum Machines: Sensing and Computing with by Andrew Adamatzky

By Andrew Adamatzky

This ebook is dedicated to Slime mold Physarum polycephalum, that's a huge unmarried cellphone able for allotted sensing, concurrent info processing, parallel computation and decentralized actuation. the benefit of culturing and experimenting with Physarum makes this slime mildew an amazing substrate for real-world implementations of unconventional sensing and computing devices

The publication is a treatise of theoretical and experimental laboratory reviews on sensing and computing houses of slime mildew, and at the improvement of mathematical and logical theories of Physarum habit.

It is proven the way to make logical gates and circuits, digital units (memristors, diodes, transistors, wires, chemical and tactile sensors) with the slime mold. The ebook demonstrates the way to adjust houses of Physarum computing circuits with useful nano-particles and polymers, to interface the slime mildew with field-programmable arrays, and to take advantage of Physarum as a controller of microbial gas cells.

A targeted multi-agent version of slime is proven to serve good as a software program slime mold able for fixing difficulties of computational geometry and graph optimization. The multiagent version is complemented by means of mobile automata types with parallel accelerations. provided mathematical types encouraged through Physarum comprise non-quantum implementation of Shor's factorization, structural studying, computation of shortest course tree on dynamic graphs, provide chain community layout, p-adic computing and syllogistic reasoning.

The booklet is a different composition of brilliant and lavishly illustrated essays in an effort to encourage scientists, engineers and artists to use ordinary phenomena in designs of destiny and emergent computing and sensing units. it's a 'bible' of experimental computing with spatially prolonged residing substrates, it spanstopics from biology of slime mildew, to bio-sensing, to unconventional computing units and robotics, non-classical logics and tune and arts.

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Computing devices are based on spatial arrangements of simple fundamental logic gates. These gates may be combined to form more complex adding circuits and, ultimately, complete computer systems. Implementing classical adding circuits using unconventional, or even living, substrates is made difficult and impractical by the challenges of branching fan-out of inputs and regions where circuit lines must cross without interference. We explore mechanisms to avoid spatial propagation, branching and crossing completely in the design of adding circuits.

When another reference cell (blue) reaches the junction, it can only take the route to the output. On the other hand, in the case of input 1, the input Physarum cell (red) is inoculated first and it migrates straight to the buffer. This blocks the paths for two reference cells, the possible action for the reference cells is only to merge with the input cell (Rule 3) and therefore no output is given. The attraction logic gates can operate with over 80 % success rate [33]. It was also observed that plasmodium cells changes the tactic behaviour (Rule 1–3) when the gates are broken.

The 10 min period before stimulation was used as the baseline frequency measurement (fpre) and the 10 min after stimulation had started was the frequency change (fpost); relative frequency change ( f) was calculated and expressed as a percentage. Fig. 6 An example of Physarum protoplasmic tube grown between agar hemispheres Logical Gates and Circuits Implemented in Slime Mould 49 Logic gate approximation as described in [35] uses frequency change of shuttle streaming to determine a logic true or false output.

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