
PhD student @ImperialCollege. Ex ML engineer @ Limbic AI #graphs #AI4Health
London
Joined August 2019
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Josh Southern retweeted
“Balancing Efficiency and Expressiveness: Subgraph GNNs with Walk-Based Centrality” is at #ICML2025!
Drop by our poster on Tuesday 11:00–13:30, East Exhib. Hall A-B # E-3005.
Joint work w/ @JoshSouthern13 @ytn_ym @GuyBarSh @mmbronstein @HaggaiMaron
arxiv.org/abs/2501.03113
🧵
Josh Southern retweeted

Xingyue Huang@hxyscott24 Feb 2025
🇺🇸
United StatesConnected via United Kingdom Android AppAccount-level information, not a live location or per-post device.
Knowledge Graph Foundation Models (KGFMs) are at the frontier of graph learning - but we didn’t have a principled understanding of what we can (or can’t) do with them. Now we do! 💡🚀
🧵
with Pablo Barcelo, @ismaililkanc, @mmbronstein, @michael_galkin, @JuanLReutter, @OrthMiguel
Josh Southern retweeted
Really excited: 2/2 our papers got accepted to @iclr_conf! Thanks to all amazing co-authors and hope to see you in Singapore! 🇸🇬
If you're interested in generative models and RL agents for drug design check our papers in the thread 🧵
Josh Southern retweeted
⭐️LOGML is back and we are looking for mentors!⭐️
Do you work in geometry or machine learning? Apply by February 16th!
Mentors lead a group of 6 students to work on a project during the week and some groups end up publishing their work. More information at logml.ai/
⭐️Mentor applications open⭐️
We're excited to announce that LOGML summer school will return in London: July 7-11 2025. We are seeking mentors to lead group projects at the intersection of geometry and machine learning. Find out more and apply:
logml.ai
Josh Southern retweeted
Dear Network,
Jesse Read and I would like to advertise the attached PhD position (start date: September 2025).
We would like to work with you in the intersection of Graph Neural Networks, Reinforcement Learning, and Graph Signal Processing.
We look forward to hearing from you!
Josh Southern retweeted
The use of #AI to increase success of IVF by identifying the right follicle sizes (13-18 mm) to optimize timing of "trigger" shots nature.com/articles/s41467-0…
Josh Southern retweeted
Hi!👋Emily Simons here, @FulbrightPrgrm Student Researcher with @HelmholtzMunich's AIDOS Lab.
Happy to be sharing my first contribution to AIDOS in this 🧵.
Say hiya to SCOTT, the perfect holiday (software) package🎁for the #curvature and #graph enthusiast in your life.
🧵1/n
Josh Southern retweeted
Join us in NYC as a graduate student intern @PrescientDesign, @genentech this summer to work on fundamental research in 3D generative models, with applications to protein design!
Apply directly, and please share with anyone who may be interested!
Link below 👇👇
Josh Southern retweeted
🌟 GLOW is coming back in December with amazing speakers: Emily Jin and @JoshSouthern13!
🗓️ Dec 18th @ 17 CET on Zoom, don't miss that!
🌐 Find more here: sites.google.com/view/graph-…
Josh Southern retweeted
A postdoc position is available in my group at Harvard @hseas to perform research at the intersection of Geometry & Machine Learning. Research interests include Representation Learning, Learning on Graphs & Manifolds, and applications in the Sciences. Details here: academicpositions.harvard.ed…
Josh Southern retweeted
Great to make the journey out to Denver to present our recent work on genomic-driven ML interventions for #PCOS at #ASRM2024 @JoshSouthern13 @ChiomaIzzi @WaljitD @robertobaggio99 @ImperialMDR
Josh Southern retweeted
Exploring “dark-matter” protein folds using deep learning @CellSystemsCP
• Introducing Genesis VAE, a convolutional variational autoencoder that transforms low-resolution protein fold sketches into designable, stable 3D models.
• Genesis VAE enables rapid exploration of “dark-matter” protein folds, creating novel protein architectures that have never been observed in nature.
• Coupled with trRosetta, Genesis can design protein sequences for both known and novel folds, validated through experimental protease resistance assays.
• One major innovation is Genesis’ ability to learn structural patterns from low-resolution sketches, refining them into native-like protein backbones.
• The framework successfully designed five native folds and three novel “dark-matter” folds, demonstrating its capacity to generalize beyond natural protein spaces.
• High-throughput experimental validation showed several of the designed proteins were stable, with folding behavior on par with natural proteins.
• Genesis opens the door for the de novo design of proteins with entirely new functions, breaking through current limitations in protein design.
@zanderharteveld @mmbronstein @befcorreia @JoshSouthern13 @CasperGoverde @m_deff @loukasa_tweet @trekkinglemon
💻Code: github.com/zanderharteveld/g…
📜Paper: cell.com/cell-systems/fullte…
Josh Southern retweeted
🎓 And that's a wrap on the LOGML Summer School! 🥰
It was an incredible experience organizing it. A huge thank you to all our speakers for their insightful talks, to our mentors for making it an unforgettable experience for the students, and to all of you for attending! 👏
Josh Southern retweeted
protein design is getting weird ... and increasingly functional ! These are very weird designs !
biorxiv.org/content/10.1101/…
fun collaboration with @karla_mcastro @_JosephWatson @jueseph @UWproteindesign
Josh Southern retweeted
We are hiring a postdoc at Imperial as a full-fledged affiliate of our new Erlangen Programme for Mathematical & Computational Foundations of AI Hub! Check it out, spread the word, and apply! 🤓👇
imperial.ac.uk/jobs/search-j…
Josh Southern retweeted
Taking a fresh look at an old challenge: therapeutic lead discovery 💊 Our Portal blog dives into how our causally-inspired GNN model, PDGrapher, changes up the game by predicting therapeutic agents directly from phenotypic data🧬
work with @marinkazitnik and @mmbronstein
In the latest blog on Portal, @justguadaa helps you imagine a world where finding a disease treatment isn’t about endlessly searching through drug candidates but finding the perfect molecule to reverse a disease.
Learn more about PDGrapher:
portal.valencelabs.com/blogs…
Josh Southern retweeted
n the last edition of LOGML (logml.ai/), we surfed on the neural sheaf. For this we travel at the speed of light: logml.ai/projects/Lorenzo-Gi…
London Geometry and Machine Learning (LOGML) is a summer school held 7-12 Jul 2024 at Imperial College London.
Josh Southern retweeted
Looking forward to mentoring a project at this great summer school! Students interested in GNNs / geometric deep learning should consider applying 😀
🌟Applications open - LOGML 2024🌟
👥 Mentor-led projects, expert talks, tutorials, socials, and a networking night
📝 Application form: logml.ai/
📅 Apply by 26 Jan 2024 📝
📩 Questions? [email protected]
#LOGML #Geometry #MachineLearning #SummerSchool
Josh Southern retweeted
Excited to share PDGrapher! - a causally-inspired GNN model to predict therapeutically useful perturbagens🧬💊
📜biorxiv.org/content/10.1101/…
🔬zitniklab.hms.harvard.edu/pr…
💫Thank you to amazing collaborators and mentors @marinkazitnik, Isuru Herath, Kirill Veselkov, @mmbronstein
Introducing PDGrapher - Combinatorial prediction of therapeutically useful chemical and genetic perturbations using causally-inspired neural networks
Many methods learn responses to perturbations, but PDGrapher is addressing the inverse problem, which is to infer the perturbagen necessary to achieve a specific response – i.e., directly predict perturbagens by finding what chemical or genetic perturbations elicit a desired response
w/ Guadalupe Gonzalez @justguadaa, Isuru Herath, Kirill Veselkov, Michael Bronstein @mmbronstein @HarvardDBMI @KempnerInst @harvard_data @UniofOxford @imperialcollege
🚀 biorxiv.org/content/10.1101/…
🧬 github.com/mims-harvard/PDGr…
🔬 zitniklab.hms.harvard.edu/pr…
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