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Towards a Physarum learning chip

Whiting, James G. H.; Jones, Jeff; Bull, Larry; Levin, Michael; Adamatzky, Andrew

Authors

James Whiting James.Whiting@uwe.ac.uk
Senior Lecturer and Programme Leader of Foundation Engineering - FET EDM

Jeff Jones

Lawrence Bull Larry.Bull@uwe.ac.uk
AHOD Research and Scholarship and Prof

Michael Levin



Abstract

Networks of protoplasmic tubes of organism Physarum polycehpalum are macro-scale structures which optimally span multiple food sources to avoid repellents yet maximize coverage of attractants. When data are presented by configurations of attractants and behaviour of the slime mould is tuned by a range of repellents, the organism preforms computation. It maps given data configuration into a protoplasmic network. To discover physical means of programming the slime mould computers we explore conductivity of the protoplasmic tubes; proposing that the network connectivity of protoplasmic tubes shows pathway-dependent plasticity. To demonstrate this we encourage the slime mould to span a grid of electrodes and apply AC stimuli to the network. Learning and weighted connections within a grid of electrodes is produced using negative and positive voltage stimulation of the network at desired nodes; low frequency (10 Hz) sinusoidal (0.5 V peak-to-peak) voltage increases connectivity between stimulated electrodes while decreasing connectivity elsewhere, high frequency (1000 Hz) sinusoidal (2.5 V peak-to-peak) voltage stimulation decreases network connectivity between stimulated electrodes. We corroborate in a particle model. This phenomenon may be used for computation in the same way that neural networks process information and has the potential to shed light on the dynamics of learning and information processing in non-neural metazoan somatic cell networks.

Citation

Whiting, J. G. H., Jones, J., Bull, L., Levin, M., & Adamatzky, A. (2016). Towards a Physarum learning chip. Scientific Reports, 6, https://doi.org/10.1038/srep19948

Journal Article Type Article
Acceptance Date Dec 4, 2015
Online Publication Date Feb 3, 2016
Publication Date Feb 3, 2016
Deposit Date Feb 23, 2016
Journal Scientific Reports
Electronic ISSN 2045-2322
Publisher Nature Research (part of Springer Nature)
Peer Reviewed Peer Reviewed
Volume 6
Article Number 19948
DOI https://doi.org/10.1038/srep19948
Keywords Physarum polycephalum
Public URL https://uwe-repository.worktribe.com/output/924490
Publisher URL http://dx.doi.org/10.1038/srep19948
Related Public URLs http://www.ncbi.nlm.nih.gov/pubmed/26837470

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