human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "towards slime mould colour sensor recognition of colours by physarum polycephalum"
  Abstract: Acellular slime mould Physarum polycephalum is a popular now user-friendly living substrate for designing of future and emergent sensing and computing devices. P. polycephalum exhibits regular patterns of oscillations of its surface electrical potential. The oscillation patterns are changed when the slime mould is subjected to mechanical, chemical, electrical or optical stimuli. We evaluate feasibility of slime-mould based colour sensors by illuminating Physarum with red, green, blue and white colours and analysing patterns of the slime mould's electrical potential oscillations. We define that the slime mould recognises a colour if it reacts to illumination with the colour by a unique changes in amplitude and periods of oscillatory activity. In laboratory experiments we found that the slime mould recognises red and blue colour. The slime mould does not differentiate between green and white colours. The slime mould also recognises when red colour is switched off. We also map colours to diversity of the oscillations: illumination with a white colour increases diversity of amplitudes and periods of oscillations, other colours studied increase diversity either of amplitude or period.

Connected through hyperedge HE-1 (induced by source paper "discovering boolean gates in slime mould"):
  with members:
    - "slime mould memristors"
    - "practical circuits with physarum wires"
    - "slime mould logic gates based on frequency changes of electrical potential oscillation"
    - "slime mould electronic oscillators"
    - "towards slime mould chemical sensor mapping chemical inputs onto electrical potential dynamics of physarum polycephalum"
    - "slime mould tactile sensor"
    - "are complex systems hard to evolve"

Connected through hyperedge HE-2 (induced by source paper "thirty eight things to do with live slime mould"):
  with members:
    - "material approximation of data smoothing and spline curves inspired by slime mould"
    - "on hybrid circuits exploiting thermistive properties of slime mould"
    - "slime mould electronic oscillators"
    - "towards slime mould chemical sensor mapping chemical inputs onto electrical potential dynamics of physarum polycephalum"
    - "bio imitation of mexican migration routes to the usa with slime mould on 3d terrains"
    - "slime mould tactile sensor"
    - "computation of the travelling salesman problem by a shrinking blob"
    - "on creativity of slime mould"

Connected through hyperedge HE-3 (induced by source paper "quantitative transformation for implementation of adder circuits in physical systems"):
  with members:
    - "the emergence and dynamical evolution of complex transport networks from simple low level behaviours"
    - "physarum chip developments in growing computers from slime mould"
    - "sensory fusion in physarum polycephalum and implementing multi sensory functional computation"
    - "is spiking logic the route to memristor based computers"
    - "slime mould logic gates based on frequency changes of electrical potential oscillation"
    - "towards slime mould chemical sensor mapping chemical inputs onto electrical potential dynamics of physarum polycephalum"
    - "slime mould tactile sensor"
    - "boolean logic gate design principles in unconventional computers an nmr case study"

Connected through hyperedge HE-4 (induced by source paper "living wires effects of size and coating of gold nanoparticles in altering the electrical properties of physarum polycephalum and lettuce seedlings"):
  with members:
    - "slime mould memristors"
    - "towards plant wires"
    - "routing of physarum polycephalum signals using simple chemicals"
    - "on the internalisation intraplasmodial carriage and excretion of metallic nanoparticles in the slime mould physarum polycephalum"
    - "towards physarum robots computing and manipulating on water surface"

Connected through hyperedge HE-5 (induced by source paper "slime mould memristors"):
  with members:
    - "is spiking logic the route to memristor based computers"
    - "towards slime mould chemical sensor mapping chemical inputs onto electrical potential dynamics of physarum polycephalum"
    - "slime mould tactile sensor"
    - "evolution of plastic learning in spiking networks via memristive connections"
    - "slime mould computes planar shapes"

Connected through hyperedge HE-6 (induced by source paper "on hybrid circuits exploiting thermistive properties of slime mould"):
  with members:
    - "slime mould memristors"
    - "slime mould logic gates based on frequency changes of electrical potential oscillation"
    - "slime mould electronic oscillators"
    - "towards slime mould chemical sensor mapping chemical inputs onto electrical potential dynamics of physarum polycephalum"
    - "slime mould tactile sensor"

Connected through hyperedge HE-7 (induced by source paper "slime mould logic gates based on frequency changes of electrical potential oscillation"):
  with members:
    - "physarum chip developments in growing computers from slime mould"
    - "sensory fusion in physarum polycephalum and implementing multi sensory functional computation"
    - "towards slime mould chemical sensor mapping chemical inputs onto electrical potential dynamics of physarum polycephalum"
    - "slime mould tactile sensor"

Connected through hyperedge HE-8 (induced by source paper "slime mould electronic oscillators"):
  with members:
    - "slime mould memristors"
    - "towards slime mould chemical sensor mapping chemical inputs onto electrical potential dynamics of physarum polycephalum"
    - "slime mould tactile sensor"
    - "towards hybrid artificial slime mould devices"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.ET(Emerging Technologies)