#MorphologicalComputation for #SwarmEngineering of #ActiveMatter.

"building upon the recent theoretical progress made in describing the population of active particles, one can envision a rapid development of a statistical mechanics description of smart active matter for future swarm engineering."
https://www.science.org/doi/10.1126/scirobotics.abo6140

Hello Mastodonts, my name is Otti Croze and I am a lecturer at Newcastle university in the UK. My research is in the physical and mathematical biology of microbes. I have a particular interest in swimming species of microalgae and bacteria (microswimmers) with application to sustainable bio- and agri-tech , and have also worked on algal- bacterial mutualisms between soil species. See my profile for website. #microbes #algae #bacteria #biotech #microswimmers #activematter

#SoftMatter have just published the results of a project that Renato Assante, Davide Marenduzzo, Alexander Morozov, and I recently worked on together! What did we do and what’s new? Briefly…

#Microswimmer suspensions behave in a similar way to fluids containing kinesin and microtubules. Both systems can be described by the same system of three coupled nonlinear #PDEs.

A #LinearStabilityAnalysis of these equations suggests that variations in concentration across the system don’t significantly affect emergent #phaseBehaviour. How then can we explain #experiments that show visible inhomogeneities in #microtubule–#kinesin mixtures, for instance?

With increasing activity, we move away from the quiescent regime, past the onset of #SpontaneousFlow, and deeper into the active phase, where #nonlinearities become more important. What role do concentration inhomogeneities play here?

We investigated these questions, taking advantage of the #openSource #Dedalus #spectral framework to simulate the full nonlinear time evolution. This led us to predict a #novel regime of #spontaneous #microphaseSeparation into active (nematically ordered) and passive domains.

Active flow arrests macrophase separation in this regime, counteracting domain coarsening due to thermodynamic coupling between active matter concentration and #nematic order. As a result, domains reach a characteristic size that decreases with increasing activity.

This regime is one part of the #PhaseDiagram we mapped out. Along with our other findings, you can read all about it here!

low #ReynoldsNumber #turbulence #ActiveTurbulence #CahnHilliard #ActiveMatter #NavierStokes #BerisEdwards #CondensedMatter #PhaseTransitions #TheoreticalPhysics #BioPhysics #StatisticalPhysics #FluidDynamics #ComputationalPhysics #Simulation #FieldTheory #paperthread #NewPaper #science #research #ActiveGel #activeNematic #analytic #cytoskeleton #hydrodynamics #MPI #theory

very interesting question... #activematter
I reckon that to qualify as a micro/nanorobot the agent should have something beyond just motility - for example a minimal cognition (loosely defined, e.g. phototaxis), though in the literature the term has been used for much less?!
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RT @LauraAlvarez_F
I would like to throw out a (controversial?) question over here targeting active matter peers, other field scientists, and also the gener…
https://twitter.com/LauraAlvarez_F/status/1613129343357657088

#SoftMatter have just published the results of a project that Renato Assante, Davide Marenduzzo, Alexander Morozov, and I recently worked on together! What did we do and what’s new? Briefly…

The #hydrodynamic behaviour of inhomogeneous #activeNematic gels (such as extensile bundles of #cytoskeletal filaments or suspensions of low #ReynoldsNumber swimmers) can be described by the time evolution of three coupled #PDEs.

Standard #ActiveGel #theory concludes, from a #LinearStabilityAnalysis of these equations, that fluctuations in concentration don’t significantly affect emergent #phaseBehaviour. However, this leaves #experimental #observations of visible inhomogeneities in #microtubule–#kinesin mixtures unexplained. As we move away from the passive (quiescent) regime, past the onset of #SpontaneousFlow, and deeper into the active phase, #nonlinearities become more important. What role do concentration inhomogeneities play here?

Alongside #analytic techniques, we used an in-house #MPI-parallel code developed within the #Dedalus #spectral framework to investigate. We predict a #novel regime of #spontaneous #microphaseSeparation into active (nematically ordered) and passive domains. In this regime, active flow arrests macrophase separation, which is itself driven by the thermodynamic coupling between active matter concentration and #nematic order. As a result, domains do not #coarsen past a typical size, which decreases with increasing activity. This regime is one part of the #PhaseDiagram we mapped out.

Along with our other findings, you can read all about it here!

#CahnHilliard #ActiveMatter #NavierStokes #BerisEdwards #CondensedMatter #PhaseTransitions #TheoreticalPhysics #BioPhysics #StatisticalPhysics #FluidDynamics #ComputationalPhysics #Simulation #FieldTheory #paperthread #NewPaper #science #research

RT @PhysRevE@twitter.com

Noise-induced swarming of active particles, Chunming Zheng and Ralf Tönjes #ActiveMatter #SoftMatter https://go.aps.org/3iFL6B2

🐦🔗: https://twitter.com/PhysRevE/status/1600491593156513792

Hello world! I’m currently a postdoc at #UniStuttgart who uses statistical physics to comprehend the behaviour of active matter. Computers, blackboards, pencils, paper, and very talented peers help me in this endeavour. Besides science, I’m fond of coffee, hiking, board games, and reading about anything that’s intriguing.
#introduction #ScienceMastodon #physics #statisticalphysics #activematter #softmatter

We are the Institute for Theoretical Physics IV at the @Uni_Stuttgart. We study complex systems with the tools of statistical physics using computers but also pen and paper. We are particularly interested in active matter and self-organization in soft materials. Here we will post some news about the group and events, but mostly about our research.
#introductions #activematter #nonequilibrium #softmatter #statmech

RT @mazza_lab
Very happy to announce the publication of a multi-year project together with @FJSchwarzendahl on #ActiveMatter. Using extensive GPU simulations and theory we find a percolation in a 3D system of pusher swimmers (eg, E. coli). https://iopscience.iop.org/article/10.1209/0295-5075/aca11c/meta

Played forward or backward, #movies of #equilibrium systems are identical. Those of #activematter ones aren’t. Researchers now have a way to quantify those differences on small length scales.

Read this commentary by #activematter researcher Matteo Paoluzzi of the University of Barcelona.

#physicsmagazine #sciencemastodon #physicsnews #sciencejournalism #sciencenews #physics #PRL #outofequilibrium #nonequilibrium #commentary #viewpoint #entropy

https://physics.aps.org/articles/v15/179

Hello! As I’m new both to #Mastodon and to the #QOTO instance, I’d like to make my #introductions here.

I’m Dom, a postgraduate researcher studying #CondensedMatter, in particular #SoftMatter, #ActiveMatter, #MolecularBiology, #CellBiology, #PhaseTransitions, and #ComplexSystems using the tools of #TheoreticalPhysics, #BioPhysics, #StatisticalPhysics, #FluidDynamics, #ComputationalPhysics, and #Simulation.

I’m working on a few projects at the moment. One addresses #universality in active #turbulence with #spectral techniques. Another predicts a new microphase separation regime in inhomogeneous active #nematics by simulating the coupled #CahnHilliard, #NavierStokes, and #BerisEdwards equations. In another project I’m developing a #FieldTheory of the #orderphobic effect, a nonspecific interaction between #transmembrane bodies anchored in a #lipid #bilayer.

I’m also interested in…
#cycling
#ArchLinux
#Linux
#LibreSoftware
learning #Korean
#yoga
#calisthenics
#singing
#autonomy
#Cooperatives
#DeliberativeDemocracy
#CitizensAssemblies
#ParticipatoryDemocracy
#DemocraticInnovation
#OpenDemocracy
#LibertarianSocialism
#RightToRepair
#democracy
#humanism
#rationalism
#OpenScience
#science
#CommunityEmpowerment
#community
#commons
#research
#wikis
#governance

Fire ant rafts form because of the Cheerios effect, study concludes - Enlarge / Georgia Tech scientists found that the so-called "Cheerios ef... - https://arstechnica.com/?p=1881039 #collectivebehavior #phasetransitions #activematter #fireants #science #biology #physics

Three days of work, the first step of a new project. Happy 😊.
#activematter #molecularmotor #simulation #Julialang