Scholar

Thilo Groß

Videos
H-index: 40
Physics 27%
Biology 18%
more

Reposted by: Thilo Groß, Joshua S. Weitz

harmitmalik.bsky.social
Any academic folks on H1B visas (even with stamps in passports) please get legal advice from your University attorneys before leaving the US.
8 140 290

Reposted by: Thilo Groß

netscisociety.bsky.social
In just about a week, the season's first NetSci Colloquium will happen. And we're starting with a bang . . . with none other than Iain Couzin talking about Collective Behavior in Animal Groups. September 24, 10 AM ET. Register here to get a Zoom link: iu.zoom.us/webinar/regi...
15 10

Reposted by: Thilo Groß

biondlab.bsky.social
Paper alert! See the new pre-print up on arXiv by Tim Mauch (@timmauch.bsky.social) and Thilo Gross (@thilogross.bsky.social) on opinion formation:
arxiv.org/abs/2508.15377

The paper discusses the very nice results of Tim's master thesis, so let's get into the details, shall we?

1/5
Diffusion-driven pattern formation in an opinion dynamical network model
The spatial organization of individuals and their interactions in communities are important factors known to preserve diversity in many complex systems. Inspired by metapopulation models from ecology,...
arxiv.org
1 2 6

by Thilo Groß

thilogross.bsky.social
→ Are you interested in multiscale phenomena such as the complex dynamics that arise in biology, chemistry, neuroscience, and physics when multiple spatial or temporal scales interact? 🧪

Then join us this summer in Groningen for the summer school:

lnkd.in/gViS3cCZ
LinkedIn
This link will take you to a page that’s not on LinkedIn
lnkd.in
1 1 3

Reposted by: Thilo Groß, Scott C. Doney, Helmut Hillebrand

hifmb.de
The call for our 2026 Postdoc Cohort is now open. We offer 4 full-time positions. Apply until August 24th. hifmb.de/jobs
Please spread the word.
#postdoc #jobsinscience #marinebiodiversity #antarctica
@awi.de @hillebr1.bsky.social @ibaums.bsky.social @thilogross.bsky.social @merenbey.bsky.social 🦑
24 28

by Thilo Groß

thilogross.bsky.social
The rot is spreading ...
chrisdornan.bsky.social
Christopher Dornan @chrisdornan.bsky.social · Jun 21
Just a reminder that Orwell’s protagonist in 1984, Winston Groom, works as a copy editor, except that his job entails endlessly “correcting the data” so that the archival record conforms to the Party’s preferred fictions, and what is “known” becomes a principal instrument of conformity.
1

by Thilo Groß

thilogross.bsky.social
This focus on using research funding to support business is harmful.

by Joanna Bryson — Reposted by: Thilo Groß, Juan-Camilo Cárdenas, Elizabeth Stevenson , and 1 more

huxleymorgan.bsky.social
Black and white image of Iranian author Marjane Satrapi, smoking a cigarette. "The world is not divided between east and west. You are American, I am Iranian, we don't know each other, but we talk and we understand each other perfectly. The difference between you and your government is much bigger than the difference between you and me. And the difference between me and my government is much bigger than the difference between me and you. And our governments are very much the same."
3 8.8K 24K

Reposted by: Thilo Groß, Sue Timmis

chrisdornan.bsky.social
Just a reminder that Orwell’s protagonist in 1984, Winston Groom, works as a copy editor, except that his job entails endlessly “correcting the data” so that the archival record conforms to the Party’s preferred fictions, and what is “known” becomes a principal instrument of conformity.
41 680 2.2K

Reposted by: Thilo Groß

various.complexities.eu
Our new article in Chaos. One of my favorite articles so far. Connecting different disciplines and building on recent breakthroughs in ancient fields (Linear Algebra!).

link.growkudos.com/1ebwrn9qkn4

doi.org/10.1063/5.02...
How individual systems and their connections react to each other to ensure stability of the whole.
We live in a complex world with a plethora of connections and interactions. Many important processes, such as power grid dynamics, ecological interactions, opinion formation, or brain plasticity, can ...
link.growkudos.com
3 9

Reposted by: Thilo Groß

whstancil.bsky.social
insane moment in world history right here
130 990 4.2K

by Thilo Groß

thilogross.bsky.social
I would just leave the country in which there is a financial crisis in higher education. In fact, I have.
1

Reposted by: Thilo Groß

akfbio.bsky.social
New paper led by @janamassing.bsky.social, with @jdyeakel.bsky.social and @thilogross.bsky.social, on dynamics of cooperative bacteria: www.biorxiv.org/content/10.1...
1 3 12

Reposted by: Thilo Groß, Michelle Kelly‐Irving, Jens Rommel , and 5 more

marckeuschnigg.bsky.social
We are hiring postdocs in Computational Social Science
📍SweCSS, Norrköping, Sweden
⏰Deadline June 3
🔗https://liu.se/en/work-at-liu/vacancies/26854
Please apply // help us spread the word
Norrköping campus at sunset
2 76 110

by Thilo Groß

thilogross.bsky.social
To explore this further we need models that can exhibit both tipping and gradual transitions in biodiversity. The cross-feeding model proposed here is a very simple model that fills this need.

Of course there is still much room for improvement, but this is how far we got.
6

by Thilo Groß

thilogross.bsky.social
There is another reason why this is interesting. Presently there is a debate whether or when biodiversity in diverse systems can actually tip. See for example this paper by @hillebr1.bsky.social et al.

www.nature.com/articles/s41...
Thresholds for ecological responses to global change do not emerge from empirical data - Nature Ecology & Evolution
The utility of the threshold paradigm, such that relatively small perturbations drive abrupt ecosystem changes, is challenged by a synthesis of 36 meta-analyses, which detected few signatures of thres...
www.nature.com
1 1 5

by Thilo Groß

thilogross.bsky.social
In the lab we then supply the community with growth media which supply some of the metabolites. This effectively removes these metabolites as limiting requirements. So this can be also modelled as an attack: C(x)->C(B(x)), where B describes the medium.
...
1 1

by Thilo Groß

thilogross.bsky.social
Why is this interesting: First, it shows why diversity tends to collapse in small samples. By missing some of the producers of metabolites we can cross the tipping point. In the equations we can model this effect of sampling as an attack on the network: We replace M(x)->M(A(x)).
Illustration of the microbial sampling procedure. As a result of sampling a tipping point is crossed.
1 1 3

by Thilo Groß

thilogross.bsky.social
Of course this is the classic two-folds scenario of tipping, so when we vary a second parameter (e.g. mean number of producers per metabolite), we find a nice Cusp bifurcation. This shows that the transition from high diversity to low diversity can occur by tipping/gradually depending on params...
1 1

by Thilo Groß

thilogross.bsky.social
For reasonable choices of parameters this system exhibits tipping points between a low and high diversity state ...
Figure showing that changing the mean number of consumer requirements leads to tipping. The transitions occur in the characteristic pattern of two fold bifurcations with a region of hysteresis in the middle.
1 1

by Thilo Groß

thilogross.bsky.social
So this becomes a percolation problem. The whole setup is captured by two nice eqs. Here c* is num of bacteria chance m^* is num of metabolites, and C, M, are the GFs for number of requirements, number of producers per metabolite ...
Equation: c* = C(m*), m*=1-M(1-c*)
1 3

by Thilo Groß

thilogross.bsky.social
So this becomes a directed bipartitie network, but if you want you can also think of it as a multilayer net or hypergraph.

What fascinates me is the algebraic structure: Bacteria in the system need ALL their requirements to be met, whereas metabolites need ONE of their producers to be present...
1 1 2

by Thilo Groß

thilogross.bsky.social
So this is about about crossfeeding, that is the exchange of molecules between bacteria. Think of this as a network where each node is a species of bacteria or a type of metabolite. Directed links indicate which metabolites are required by, or produced by the bacteria. ...
1 1

by Thilo Groß

thilogross.bsky.social
I finally got around to edit the second part of the video on the walk (it mostly explains the math of how it was made).
youtu.be/g52Lcr3rRHc
(The first part is here: youtu.be/Mnaf2Y_ydq8 )
Bridge-building, Chinese Postman, and Hierholzer's Algorithm (NC 3-2)
YouTube video by Complexity Papers
youtu.be
12

by Thilo Groß

thilogross.bsky.social
Everybody should read this ...
carlbergstrom.com
Carl T. Bergstrom @carlbergstrom.com · Mar 19
1. For the past thirty years I've had the best job in the world.


I've had the opportunity to follow my curiosity; explore the workings of nature and society; mentor students and junior colleagues in the same process; and teach generations of students about it all.
1 4

by Thilo Groß

thilogross.bsky.social
Great idea!
1

by Thilo Groß

thilogross.bsky.social
Thank you for finding this great content!

by Thilo Groß

thilogross.bsky.social
The link seems to be broken.
1 1

Reposted by: Thilo Groß

alecrimi.bsky.social
new on @NaturePhysics review:
"Network renormalization"
www.nature.com/artiles/s422...
Preprint: arxiv.org/pdf/2412.12988

#complexnetworks #brain #connectome
1 2 10

by Thilo Groß

thilogross.bsky.social
Indoors I use the same shure MV as everybody, but I do most of my videos outside, which also solves this.
1 2

References

Fields & subjects

Updated 1m