A minimal model of metabolism-based chemotaxis

Egbert, M. D., Barandiaran, X. E., & Di Paolo, E. A. (2010). A Minimal Model of Metabolism-Based Chemotaxis. PLoS Comput Biol, 6(12), e1001004.

We present the first model of metabolism-based chemotaxis that accomplishes chemotaxis without transmembrane receptors or signal transduction proteins, through the direct modulation of flagellar rotation by metabolite concentrations. The minimal model recreates chemotactic patterns found in real bacteria, illuminating some previous work metabolism-dependent chemotaxis. A nice example of the inpiration taken from an autonomous perspective on agency, linking metabolism and behaviour.

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Behavioral Metabolution: the very idea

The paper I wrote together with Matthew Egbert and Ezequiel Di Paolo got accepted and will be soon published at the Proceedings of the 12th International Conference on Artificial Life. It is entitled Behavioral Metabolution: Metabolism Based Behavior Enables New Forms of Adaptation and Evolution and it addresses, the evolutionary scale interaction between metabolism and behavior, using a simulation of a bacteria-like moving protocell whose behavioral architecture is constituted by metabolism itself.

Behavioral Metabolution Paper Thumbnail

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Homeostatic Plasticity in Robots

I am presenting this poster at the CogSys2010 Conference in Zurich. The poster shows some results of a simulation model I developed long ago (almost 5 years ago!) on a reinforcement learning task with evolutionary robotics, using homeostatic plasticity on the CTRNN controllers. I am currently writing a paper with Ezequiel Di Paolo on the details of the simulation model. The agents are capable to display a developmental process (connection weights are initialized at value 0), to solve an operant conditioning task and display the spontaneous formation of habits.

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Chemo-ethology of an adaptive protocell

I joined Matthew Egbert and Ezequiel di Paolo on this paper exploring the emergence of viability boundaries on a simulated protocell and quantifying its behavioural adaptivity in relation to such boundaries. The paper addresses some key issues regarding the origins of norms and adaptive behaviour. It got published on the Tenth European Conference on Artificial Life, ECAL09, Budapest, September 13-16, 2009, Springer Verlag.

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Animats in the Modelling Ecosystems (Response to Barbara Webb)

The Journal of Adaptive Behavior has recently published a target article by Barbara Webb entitled “Animats vs. Animals”. I was invited to write a critical response to her paper and joined Anthony Chemero to defend a variety of models in science, ranging from the most concrete to the most abstract.


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Defining Agency

I have just recently submitted the last version for publication of a new paper, together with Ezequiel Di Paolo and Marieke Rohde: Defining Agency. Individuality, Normativity, Asymmetry and Spatio-temporality in Action, to be published soon on a special issue on Agency edited by Mareke Rohde and Takashi Ikegami on Adaptive Behavior journal.


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