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- 저자 : Adamatzky (검색결과 3 건)
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Physarum Wires: Self-growing Self-repairing Smart Wires Made from Slime Mould
Andrew Adamatzky 대한의용생체공학회 2013 Biomedical Engineering Letters (BMEL) Vol.3 No.4
Purpose We report experimental laboratory studies ondeveloping conductive pathways, or wires, using protoplasmictubes of plasmodium of acellular slime mould Physarumpolycephalum. Methods Given two pins to be connected by a wire, weplace a piece of slime mould on one pin and an attractant onanother pin. Physarum propagates towards the attract and thusconnects the pins with a protoplasmic tube. A protoplasmictube is conductive, can survive substantial over-voltage andcan be used to transfer electrical current to lightning andactuating devices. Results In experiments we show how to route Physarumwires with chemoattractants and electrical fields. Wedemonstrate that Physarum wire can be grown on almostbare breadboards and on top of electronic circuits. ThePhysarum wires can be insulated with a silicon oil withoutloss of functionality. We show that a Physarum wire selfheals:end of a cut wire merge together and restore theconductive pathway in several hours after being cut. Conclusions Results presented will be used in future designsof self-growing wetware circuits and devices, and integrationof slime mould electronics into unconventional bio-hybridsystems.
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Towards a Slime Mould-FPGA Interface
Richard Mayne,Michail-Antisthenis Tsompanas,Georgios Ch. Sirakoulis,Andrew Adamatzky 대한의용생체공학회 2015 Biomedical Engineering Letters (BMEL) Vol.5 No.1
Purpose The plasmodium of slime mould Physarumpolycephalum is a multinucleate single celled organism whichbehaves as a living amorphous unconventional computingsubstrate. As an excitable, memristive cell that typicallyassumes a branching or stellate morphology, slime mould isa unique model organism that shares many key properties ofmammalian neurons. There are numerous studies that revealthe computing abilities of the plasmodium realized by theformation of tubular networks connecting points of interest. Recent research demonstrating typical responses in electricalbehaviour of the plasmodium to certain chemical and physicalstimuli has generated interest in creating an interface betweenP. polycephalum and digital logic, with the aim to performcomputational tasks with the resulting device. Methods Through a range of laboratory experiments, wemeasure plasmodial membrane potential via a non-invasivemethod and use this signal to interface the organism with adigital system. Results This digital system was demonstrated to performpredefined basic arithmetic operations and is implemented ina field-programmable gate array (FPGA). These basic arithmeticoperations, i.e. counting, addition, multiplying, use data thatwere derived by digital recognition of membrane potentialoscillation and are used here to make basic hybrid biologicalartificialsensing devices. Conclusions We present here a low-cost, energy efficientand highly adaptable platform for developing next-generationmachine-organism interfaces. These results are therefore applicable to a wide range of biological/medical and computing/electronics fields.
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Practical Circuits with Physarum Wires
James GH Whiting,Richard Mayne,Nadine Moody,Ben de Lacy Costello,Andrew Adamatzky 대한의용생체공학회 2016 Biomedical Engineering Letters (BMEL) Vol.6 No.2
Purpose Protoplasmic tubes of Physarum polycephalum,also know as Physarum Wires (PW), have been previouslysuggested as novel bio-electronic components. Until recently,practical examples of electronic circuits using PWs have beenlimited. These PWs have been shown to be self repairing,offering significant advantage over traditional electroniccomponents. This article documents work performed toproduce practical circuits using PWs. Methods We have demonstrated through manufacture andtesting of hybrid circuits that PWs can be used to produce avariety of practical electronic circuits. A plurality of differentapplications of PWs have been tested to show the universalityof PWs in analogue and digital electronics. Results Voltage dividers can be produced using a pair ofPWs in series with an output voltage accurate to within 12%. PWs can also transmit analogue and digital data with afrequency of up to 19 kHz, which with the addition of abuffer, can drive high current circuits. We have demonstratedthat PWs can last approximately two months, a 4 fold increaseon previous literature. Protoplasmic tubes can be modifiedwith the addition of conductive or magnetic nano-particles toprovide changes in functionality. Conclusions This work has documented novel macro-scaledata transmission through biological material; it has advancedthe field of bio-electronics by providing a cheap and easy togrow conducting bio-material which may be used in futurehybrid electronic technology.
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