#activematter — Public Fediverse posts

What controls the motion of self-propelled particles at interfaces?

Experiments and simulations show how Marangoni forces drive elliptical Janus particles, with dynamics strongly shaped by size and eccentricity.

🔗 https://pubs.rsc.org/en/content/articlelanding/2026/sm/d5sm01270h

#marangoni #ActiveMatter #softmatter #fluiddynamics #janusparticles

What controls the motion of self-propelled particles at interfaces?

Experiments and simulations show how Marangoni forces drive elliptical Janus particles, with dynamics strongly shaped by size and eccentricity.

🔗 https://pubs.rsc.org/en/content/articlelanding/2026/sm/d5sm01270h

#marangoni #ActiveMatter #softmatter #fluiddynamics #janusparticles

Schooling at Scale

Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.

At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)

Schooling at Scale

Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.

At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)

Schooling at Scale

Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.

At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)

Schooling at Scale

Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.

At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)

Schooling at Scale

Relatively simple visual and hydrodynamic signals are enough to make digital fish school in ways that resemble living ones. Here, researchers look at what happens when well-behaved schools of fish get too big. The researchers first demonstrate that their schools behave reasonably at one hundred members, either in a schooling configuration or a group milling around a central region.

At one thousand fish, the schools are still reasonably coherent and sensible. But at fifty thousand fish, the picture is drastically different. Neither schooling nor milling groups are able to remain together. They fracture and scatter into smaller groupings. (Video and image credit: H. Hang et al.)

Scientists are creating “animate” droplets that can act, adapt, and respond on their own, blurring the line between living and non-living matter.

Could this inspire new ways to control liquids?

🔗 https://physicsworld.com/a/droplet-scientists-push-the-boundary-between-living-and-non-living-matter/

#softmatter #ActiveMatter #dropletphysics #AutonomousSystems #fluiddynamics

Fluid Flows Break Up Microswimmer Clumps

The field of active matter looks at the collective motion of particles and organisms–how birds flock and fish school. In systems of “dry” squirmers–those that have no hydrodynamic interactions with one another–clumps of squirmers can form with empty spaces in between them. This is known as motility-induced phase separation, or MIPS. Researchers wondered whether microswimmers in a fluid–which do produce hydrodynamic forces that can affect one another–would also show MIPS.

In a new study, researchers show, instead, that hydrodynamic interactions between swimmers will prevent (or destroy) these clumps. Through a combination of theoretical work and simulation, the authors found that translational flows between swimmers swept the swimmers out of clumps as they formed. Rotational flows between swimmers made them able to change direction faster, which also kept stable clumps from forming. (Image and research credit: T. Zhou and J. Brady; via APS)

Fluid Flows Break Up Microswimmer Clumps

The field of active matter looks at the collective motion of particles and organisms–how birds flock and fish school. In systems of “dry” squirmers–those that have no hydrodynamic interactions with one another–clumps of squirmers can form with empty spaces in between them. This is known as motility-induced phase separation, or MIPS. Researchers wondered whether microswimmers in a fluid–which do produce hydrodynamic forces that can affect one another–would also show MIPS.

In a new study, researchers show, instead, that hydrodynamic interactions between swimmers will prevent (or destroy) these clumps. Through a combination of theoretical work and simulation, the authors found that translational flows between swimmers swept the swimmers out of clumps as they formed. Rotational flows between swimmers made them able to change direction faster, which also kept stable clumps from forming. (Image and research credit: T. Zhou and J. Brady; via APS)

Fluid Flows Break Up Microswimmer Clumps

The field of active matter looks at the collective motion of particles and organisms–how birds flock and fish school. In systems of “dry” squirmers–those that have no hydrodynamic interactions with one another–clumps of squirmers can form with empty spaces in between them. This is known as motility-induced phase separation, or MIPS. Researchers wondered whether microswimmers in a fluid–which do produce hydrodynamic forces that can affect one another–would also show MIPS.

In a new study, researchers show, instead, that hydrodynamic interactions between swimmers will prevent (or destroy) these clumps. Through a combination of theoretical work and simulation, the authors found that translational flows between swimmers swept the swimmers out of clumps as they formed. Rotational flows between swimmers made them able to change direction faster, which also kept stable clumps from forming. (Image and research credit: T. Zhou and J. Brady; via APS)

Fluid Flows Break Up Microswimmer Clumps

The field of active matter looks at the collective motion of particles and organisms–how birds flock and fish school. In systems of “dry” squirmers–those that have no hydrodynamic interactions with one another–clumps of squirmers can form with empty spaces in between them. This is known as motility-induced phase separation, or MIPS. Researchers wondered whether microswimmers in a fluid–which do produce hydrodynamic forces that can affect one another–would also show MIPS.

In a new study, researchers show, instead, that hydrodynamic interactions between swimmers will prevent (or destroy) these clumps. Through a combination of theoretical work and simulation, the authors found that translational flows between swimmers swept the swimmers out of clumps as they formed. Rotational flows between swimmers made them able to change direction faster, which also kept stable clumps from forming. (Image and research credit: T. Zhou and J. Brady; via APS)

Fluid Flows Break Up Microswimmer Clumps

The field of active matter looks at the collective motion of particles and organisms–how birds flock and fish school. In systems of “dry” squirmers–those that have no hydrodynamic interactions with one another–clumps of squirmers can form with empty spaces in between them. This is known as motility-induced phase separation, or MIPS. Researchers wondered whether microswimmers in a fluid–which do produce hydrodynamic forces that can affect one another–would also show MIPS.

In a new study, researchers show, instead, that hydrodynamic interactions between swimmers will prevent (or destroy) these clumps. Through a combination of theoretical work and simulation, the authors found that translational flows between swimmers swept the swimmers out of clumps as they formed. Rotational flows between swimmers made them able to change direction faster, which also kept stable clumps from forming. (Image and research credit: T. Zhou and J. Brady; via APS)

Aktualizacja Gigastructure w #ActiveMatter dodaje nowe lokacje, tryb Hired Ops oraz świeży arsenał broni. Rozgrywka staje się bardziej wymagająca dzięki zmianom w systemie permadeath i większej personalizacji.

https://cat5.pl/active-matter-rozszerza-sie-o-gigastructure/

Aktualizacja Gigastructure w #ActiveMatter dodaje nowe lokacje, tryb Hired Ops oraz świeży arsenał broni. Rozgrywka staje się bardziej wymagająca dzięki zmianom w systemie permadeath i większej personalizacji.

https://cat5.pl/active-matter-rozszerza-sie-o-gigastructure/

Aktualizacja Gigastructure w #ActiveMatter dodaje nowe lokacje, tryb Hired Ops oraz świeży arsenał broni. Rozgrywka staje się bardziej wymagająca dzięki zmianom w systemie permadeath i większej personalizacji.

https://cat5.pl/active-matter-rozszerza-sie-o-gigastructure/

Aktualizacja Gigastructure w #ActiveMatter dodaje nowe lokacje, tryb Hired Ops oraz świeży arsenał broni. Rozgrywka staje się bardziej wymagająca dzięki zmianom w systemie permadeath i większej personalizacji.

https://cat5.pl/active-matter-rozszerza-sie-o-gigastructure/

L'update "Gigastructure" per Active Matter aggiunge mappe, armi, mostri e modalità PvP. Attenzione alla permadeath: ora causa la perdita completa dei progressi. #GiochiPC #GiochiPS5 #GiochiSwitch #GiochiXbox #Notizievideogiochi #gamingnews #Videogiochi #ActiveMatter

🚨Fully funded PhD opportunity: Physics, biology & ecology of toxic dinoflagellate blooms 🦠.

Supervisory team from Newcastle university (main supervisors), the University of Stirling and Lancaster University.

Join us to investigate how swimming motility and the flexible utilisation of energy sources influence bloom formation, using experiment🔬and modelling ♾️. #microswimmers #plankton #biophysics #biology #ecology #ActiveMatter #PhD

Please repost

Project details: https://iapetus.ac.uk/studentships/physics-biology-and-ecology-of-toxic-plankton-blooms/

🚨Fully funded PhD opportunity: Physics, biology & ecology of toxic dinoflagellate blooms 🦠.

Supervisory team from Newcastle university (main supervisors), the University of Stirling and Lancaster University.

Join us to investigate how swimming motility and the flexible utilisation of energy sources influence bloom formation, using experiment🔬and modelling ♾️. #microswimmers #plankton #biophysics #biology #ecology #ActiveMatter #PhD

Please repost

Project details: https://iapetus.ac.uk/studentships/physics-biology-and-ecology-of-toxic-plankton-blooms/

🚨Fully funded PhD opportunity: Physics, biology & ecology of toxic dinoflagellate blooms 🦠.

Supervisory team from Newcastle university (main supervisors), the University of Stirling and Lancaster University.

Join us to investigate how swimming motility and the flexible utilisation of energy sources influence bloom formation, using experiment🔬and modelling ♾️. #microswimmers #plankton #biophysics #biology #ecology #ActiveMatter #PhD

Please repost

Project details: https://iapetus.ac.uk/studentships/physics-biology-and-ecology-of-toxic-plankton-blooms/

🚨Fully funded PhD opportunity: Physics, biology & ecology of toxic dinoflagellate blooms 🦠.

Supervisory team from Newcastle university (main supervisors), the University of Stirling and Lancaster University.

Join us to investigate how swimming motility and the flexible utilisation of energy sources influence bloom formation, using experiment🔬and modelling ♾️. #microswimmers #plankton #biophysics #biology #ecology #ActiveMatter #PhD

Please repost

Project details: https://iapetus.ac.uk/studentships/physics-biology-and-ecology-of-toxic-plankton-blooms/

🚨Fully funded PhD opportunity: Physics, biology & ecology of toxic dinoflagellate blooms 🦠.

Supervisory team from Newcastle university (main supervisors), the University of Stirling and Lancaster University.

Join us to investigate how swimming motility and the flexible utilisation of energy sources influence bloom formation, using experiment🔬and modelling ♾️. #microswimmers #plankton #biophysics #biology #ecology #ActiveMatter #PhD

Please repost

Project details: https://iapetus.ac.uk/studentships/physics-biology-and-ecology-of-toxic-plankton-blooms/

gamescom 2025: Active Matter angespielt @amgame_official #preview #vorschau #ActiveMatter #gaming #Koop

https://rushbfast.com/gamescom-2025-active-matter-angespielt/?utm_source=mastodon&utm_medium=jetpack_social

🎮 #ActiveMatter, nowa strzelanka online od Gaijin Entertainment i Matter Team, oferuje rajdy PvPvE, PvE, tryb PvP oraz bogaty arsenał.

https://cat5.pl/active-matter-hardkorowy-shooter-juz-dostepny

🎮 #ActiveMatter, nowa strzelanka online od Gaijin Entertainment i Matter Team, oferuje rajdy PvPvE, PvE, tryb PvP oraz bogaty arsenał.

https://cat5.pl/active-matter-hardkorowy-shooter-juz-dostepny

🎮 #ActiveMatter, nowa strzelanka online od Gaijin Entertainment i Matter Team, oferuje rajdy PvPvE, PvE, tryb PvP oraz bogaty arsenał.

https://cat5.pl/active-matter-hardkorowy-shooter-juz-dostepny

🎮 #ActiveMatter, nowa strzelanka online od Gaijin Entertainment i Matter Team, oferuje rajdy PvPvE, PvE, tryb PvP oraz bogaty arsenał.

https://cat5.pl/active-matter-hardkorowy-shooter-juz-dostepny

🎮 #ActiveMatter, nowa strzelanka online od Gaijin Entertainment i Matter Team, oferuje rajdy PvPvE, PvE, tryb PvP oraz bogaty arsenał.

https://cat5.pl/active-matter-hardkorowy-shooter-juz-dostepny

Active Matter đã chính thức Early Access trên PC! Game bắn súng hardcore với quái vật lấy cảm hứng từ SCP, PvPvE/PvE. Chơi một mình hoặc lập đội 3 người. Ra mắt trên Steam.

#ActiveMatter #shootergame #game #gaming #VietnameseGame #gameonline #bắn_súng

https://dev.to/gg_news/ign-active-matter-official-early-access-launch-trailer-3anm

Active Matter: Early Access des Extraction-Shooters startet im September https://www.computerbase.de/news/gaming/active-matter-early-access-des-extraction-shooters-startet-im-september.94033/ #activematter

Active Matter: Early Access des Extraction-Shooters startet im September https://www.computerbase.de/news/gaming/active-matter-early-access-des-extraction-shooters-startet-im-september.94033/ #activematter

Active Matter: Early Access des Extraction-Shooters startet im September https://www.computerbase.de/news/gaming/active-matter-early-access-des-extraction-shooters-startet-im-september.94033/ #activematter

Active Matter: Early Access des Extraction-Shooters startet im September https://www.computerbase.de/news/gaming/active-matter-early-access-des-extraction-shooters-startet-im-september.94033/ #activematter

Active Matter: Early Access des Extraction-Shooters startet im September https://www.computerbase.de/news/gaming/active-matter-early-access-des-extraction-shooters-startet-im-september.94033/ #activematter

Gra #ActiveMatter wystartuje z zamkniętymi testami już we wrześniu. Na graczy czeka całkiem solidna ilość aktywności.

https://cat5.pl/zamkniete-testy-active-matter-wystartuja-9-wrzesnia

Gra #ActiveMatter wystartuje z zamkniętymi testami już we wrześniu. Na graczy czeka całkiem solidna ilość aktywności.

https://cat5.pl/zamkniete-testy-active-matter-wystartuja-9-wrzesnia

Gra #ActiveMatter wystartuje z zamkniętymi testami już we wrześniu. Na graczy czeka całkiem solidna ilość aktywności.

https://cat5.pl/zamkniete-testy-active-matter-wystartuja-9-wrzesnia

Gra #ActiveMatter wystartuje z zamkniętymi testami już we wrześniu. Na graczy czeka całkiem solidna ilość aktywności.

https://cat5.pl/zamkniete-testy-active-matter-wystartuja-9-wrzesnia

Gra #ActiveMatter wystartuje z zamkniętymi testami już we wrześniu. Na graczy czeka całkiem solidna ilość aktywności.

https://cat5.pl/zamkniete-testy-active-matter-wystartuja-9-wrzesnia

Active Matter, FPS tattico con elementi di Tarkov e Titanfall 2, promette scontri frenetici e movimenti acrobatici in zone quanticamente instabili. Closed beta il 9/9/25 tramite Gaijin, versione completa su Steam nel 2026. #GiochiPC #Notizievideogiochi #gamingnews #Videogiochi #ActiveMatter #PCGaming

👉 https://www.absolutegamer.it/active-matter-lfps-militare-hardcore-e-praticamente-un-tarkov-sci-fi-con-il-parkour/

Active Matter, FPS tattico con elementi di Tarkov e Titanfall 2, promette scontri frenetici e movimenti acrobatici in zone quanticamente instabili. Closed beta il 9/9/25 tramite Gaijin, versione completa su Steam nel 2026. #GiochiPC #Notizievideogiochi #gamingnews #Videogiochi #ActiveMatter #PCGaming

👉 https://www.absolutegamer.it/active-matter-lfps-militare-hardcore-e-praticamente-un-tarkov-sci-fi-con-il-parkour/

Crowd Vortices

The Feast of San Fermín in Pamplona, Spain draws crowds of thousands. Scientists recently published an analysis of the crowd motion in these dense gatherings. The team filmed the crowds at the festival from balconies overlooking the plaza in 2019, 2022, 2023, and 2024. Analyzing the footage, they discovered that at crowd densities above 4 people per square meter, the crowd begins to move in almost imperceptible eddies. In the animation below, lines trace out the path followed by single individuals in the crowd, showing the underlying “vortex.” At the plaza’s highest density — 9 people per square meter — one rotation of the vortex took about 18 seconds.

The team found similar patterns in footage of the crowd at the 2010 Love Parade disaster, in which 21 people died. These patterns aren’t themselves an indicator of an unsafe crowd — none of the studied Pamplona crowds had a problem — but understanding the underlying dynamics should help planners recognize and prevent dangerous crowd behaviors before the start of a stampede. (Image credit: still – San Fermín, animation – Bartolo Lab; research credit: F. Gu et al.; via Nature)

#activeMatter #collectiveMotion #crowds #fluidDynamics #physics #science #vortices

Crowd Vortices

The Feast of San Fermín in Pamplona, Spain draws crowds of thousands. Scientists recently published an analysis of the crowd motion in these dense gatherings. The team filmed the crowds at the festival from balconies overlooking the plaza in 2019, 2022, 2023, and 2024. Analyzing the footage, they discovered that at crowd densities above 4 people per square meter, the crowd begins to move in almost imperceptible eddies. In the animation below, lines trace out the path followed by single individuals in the crowd, showing the underlying “vortex.” At the plaza’s highest density — 9 people per square meter — one rotation of the vortex took about 18 seconds.

The team found similar patterns in footage of the crowd at the 2010 Love Parade disaster, in which 21 people died. These patterns aren’t themselves an indicator of an unsafe crowd — none of the studied Pamplona crowds had a problem — but understanding the underlying dynamics should help planners recognize and prevent dangerous crowd behaviors before the start of a stampede. (Image credit: still – San Fermín, animation – Bartolo Lab; research credit: F. Gu et al.; via Nature)

#activeMatter #collectiveMotion #crowds #fluidDynamics #physics #science #vortices

Crowd Vortices

The Feast of San Fermín in Pamplona, Spain draws crowds of thousands. Scientists recently published an analysis of the crowd motion in these dense gatherings. The team filmed the crowds at the festival from balconies overlooking the plaza in 2019, 2022, 2023, and 2024. Analyzing the footage, they discovered that at crowd densities above 4 people per square meter, the crowd begins to move in almost imperceptible eddies. In the animation below, lines trace out the path followed by single individuals in the crowd, showing the underlying “vortex.” At the plaza’s highest density — 9 people per square meter — one rotation of the vortex took about 18 seconds.

The team found similar patterns in footage of the crowd at the 2010 Love Parade disaster, in which 21 people died. These patterns aren’t themselves an indicator of an unsafe crowd — none of the studied Pamplona crowds had a problem — but understanding the underlying dynamics should help planners recognize and prevent dangerous crowd behaviors before the start of a stampede. (Image credit: still – San Fermín, animation – Bartolo Lab; research credit: F. Gu et al.; via Nature)

#activeMatter #collectiveMotion #crowds #fluidDynamics #physics #science #vortices

Crowd Vortices

The Feast of San Fermín in Pamplona, Spain draws crowds of thousands. Scientists recently published an analysis of the crowd motion in these dense gatherings. The team filmed the crowds at the festival from balconies overlooking the plaza in 2019, 2022, 2023, and 2024. Analyzing the footage, they discovered that at crowd densities above 4 people per square meter, the crowd begins to move in almost imperceptible eddies. In the animation below, lines trace out the path followed by single individuals in the crowd, showing the underlying “vortex.” At the plaza’s highest density — 9 people per square meter — one rotation of the vortex took about 18 seconds.

The team found similar patterns in footage of the crowd at the 2010 Love Parade disaster, in which 21 people died. These patterns aren’t themselves an indicator of an unsafe crowd — none of the studied Pamplona crowds had a problem — but understanding the underlying dynamics should help planners recognize and prevent dangerous crowd behaviors before the start of a stampede. (Image credit: still – San Fermín, animation – Bartolo Lab; research credit: F. Gu et al.; via Nature)

#activeMatter #collectiveMotion #crowds #fluidDynamics #physics #science #vortices

Crowd Vortices

The Feast of San Fermín in Pamplona, Spain draws crowds of thousands. Scientists recently published an analysis of the crowd motion in these dense gatherings. The team filmed the crowds at the festival from balconies overlooking the plaza in 2019, 2022, 2023, and 2024. Analyzing the footage, they discovered that at crowd densities above 4 people per square meter, the crowd begins to move in almost imperceptible eddies. In the animation below, lines trace out the path followed by single individuals in the crowd, showing the underlying “vortex.” At the plaza’s highest density — 9 people per square meter — one rotation of the vortex took about 18 seconds.

The team found similar patterns in footage of the crowd at the 2010 Love Parade disaster, in which 21 people died. These patterns aren’t themselves an indicator of an unsafe crowd — none of the studied Pamplona crowds had a problem — but understanding the underlying dynamics should help planners recognize and prevent dangerous crowd behaviors before the start of a stampede. (Image credit: still – San Fermín, animation – Bartolo Lab; research credit: F. Gu et al.; via Nature)

#activeMatter #collectiveMotion #crowds #fluidDynamics #physics #science #vortices

How do active Brownian particles behave in an external alignment field? We used computer simulations to investigate gas-liquid phase coexistence, critical points, and the dynamics of spinodal decomposition. Dive into the details in Sameh's new paper or listen to the 'podcast' by NotebookLM that discusses the results for a more general audience! #ABPs #ActiveMatter #PGSB
https://doi.org/10.1103/PhysRevE.111.015425
https://youtu.be/SFfBWp32xD4

How do active Brownian particles behave in an external alignment field? We used computer simulations to investigate gas-liquid phase coexistence, critical points, and the dynamics of spinodal decomposition. Dive into the details in Sameh's new paper or listen to the 'podcast' by NotebookLM that discusses the results for a more general audience! #ABPs #ActiveMatter #PGSB
https://doi.org/10.1103/PhysRevE.111.015425
https://youtu.be/SFfBWp32xD4

Strata of Starlings

Starlings come together in groups of up to thousands of birds for the protection of numbers. These flocks form spellbinding, undulating masses known as murmurations, where the movement of individual starlings sends waves spreading from neighbor to neighbor through the group. One bird’s effort to dodge a hawk triggers a giant, spreading ripple in the flock.

To capture the flowing nature of the murmuration, photographer and scientist Kathryn Cooper layers multiple images of the starlings atop one another. The birds themselves become pathlines marking the murmuration’s motion. The final images are surprisingly varied in form. Some flocks resemble a downpour of rain; others the dangling branches of a tree. (Image credit: K. Cooper; via Colossal)

#activeMatter #biology #birds #collectiveMotion #flocking #flowVisualization #fluidDynamics #fluidsAsArt #murmuration #physics #science