Hang Zhao, supervised by Giovanni Volpe and Joana Pereira, will present his halftime seminar under the topic “Brain connectome revealed neuro-degenerative disease” on 9-10 am, 22nd Jan. 2026 in Nexus and through Zoom (https://gu-se.zoom.us/j/7726618257). The seminar starts from his presentation about the past and planned project, followed by a discussion and questions by his opponent, Professor Mattias Göksor.
Category: Presentation
Presentation by S. K. Manikandan at The Arctic Meeting for Adaptive Mechanisms in Biological Systems, Abisko, Sweden, January 21, 2026

Sreekanth Manikandan
Date: 21 Jan 2026
Time: 10:00 CEST
Place: STF Abisko, Sweden
The Arctic Meeting for Adaptive Mechanisms in Biological Systems
Quantifying the spatiotemporal forces, affinities, and dissipative costs of cellular-scale non-equilibrium processes from experimental data and localizing it in space and time remain a significant open challenge. Here, I explore how principles from stochastic thermodynamics, combined with machine learning techniques, offer a promising approach to addressing this issue. I will present preliminary results from experiments on fluctuating cell membranes and simulations of non-equilibrium systems in stationary and time-dependently driven states. These studies reveal potential strategies for localizing entropy production in experimental biophysical contexts while also highlighting key challenges and limitations that must be addressed.
Workshop by Y.-W. Chang at NEMES 2025, Gothenburg, 26 September 2025

Yu-Wei Chang, Massimiliano Passaretti
NEMES 2025, 24-26 September, 2025
Date: 25 September 2025
Time: 12:45 – 14:00
Place: Clarion Hotel Draken
This workshop begins with a practical introduction to graph theory, then guides participants through BRAPH 2 to build connectomes, compute graph measures, and run group comparisons, followed by a hands-on deep-learning pipeline. It demonstrates a unified GUI/command-line workflow, a unique architecture of BRAPH 2, helping participants move smoothly from the GUI to scripts. This workshop also guides participants to reproduce multiplex and deep-learning results on their computers from the BRAPH 2 bioRxiv preprint.
Presentation by Y.-W. Chang at NEMES 2025, Gothenburg, 26 September 2025

Yu-Wei Chang
NEMES 2025, 24-26 September, 2025
Date: 25 September 2025
Time: 09:00 – 09:45
Place: Clarion Hotel Draken
This plenary presents a practical framework for analysing neuroimaging data with network science and deep learning. It moves from modality-specific preprocessing to graph construction (single-layer and multiplex), then covers core graph measures, group inference, and brain-surface visualization, highlighting recent work from Associate Professor Joana B. Pereira’s group (Department of Clinical Neuroscience, Karolinska Institutet). It also introduces deep-learning pipelines for neuroimaging data: reservoir-computing memory capacity analysis, GapNet for handling missing data, and a robust feature-attribution method combined with SNP (single nucleotide polymorphism) information. The plenary concludes with the BRAPH 2 framework, which supports these pipelines and extends to other ongoing projects (e.g., light-sheet microscopy, Raman spectroscopy).
Poster by A. Lech at BNMI 2025, Gothenburg, 20 August 2025

Alex Lech, Mirja Granfors, Benjamin Midtvedt, Jesús Pineda, Harshith Bachimanchi, Carlo Manzo, Giovanni Volpe
BNMI 2025, 19-22 August 2025, Gothenburg, Sweden
Date: 20 August 2025
Time: 15:15-19:00
Place: Wallenberg Conference Centre
DeepTrack2 is a flexible and scalable Python library designed for simulating microscopy data to generate high-quality synthetic datasets for training deep learning models. It supports a wide range of imaging modalities, including brightfield, fluorescence, darkfield, and holography, allowing users to simulate realistic experimental conditions with ease. Its modular architecture enables users to customize experimental setups, simulate a variety of objects, and incorporate optical aberrations, realistic experimental noise, and other user-defined effects, making it suitable for various research applications. DeepTrack2 is designed to be an accessible tool for researchers in fields that utilize image analysis and deep learning, as it removes the need for labor-intensive manual annotation through simulations. This helps accelerate the development of AI-driven methods for experiments by providing large volumes of data that is often required by deep learning models. DeepTrack2 has already been used for a number of applications in cell tracking, classifications tasks, segmentations and holographic reconstruction. Its flexible and scalable nature enables researchers to simulate a wide array of experimental conditions and scenarios with full control of features and parameters.
DeepTrack2 is available on GitHub, with extensive documentation, tutorials, and an active community for support and collaboration at https://github.com/DeepTrackAI/DeepTrack2.
References:
Digital video microscopy enhanced by deep learning.
Saga Helgadottir, Aykut Argun & Giovanni Volpe.
Optica, volume 6, pages 506-513 (2019).
Quantitative Digital Microscopy with Deep Learning.
Benjamin Midtvedt, Saga Helgadottir, Aykut Argun, Jesús Pineda, Daniel Midtvedt & Giovanni Volpe.
Applied Physics Reviews, volume 8, article number 011310 (2021).
Presentation by M. Granfors at BNMI 2025, Gothenburg, 20 August 2025

Mirja Granfors, Alex Lech, Benjamin Midtvedt, Jesús Pineda, Harshith Bachimanchi, Carlo Manzo, and Giovanni Volpe
BNMI 2025, 19-22 August 2025, Gothenburg, Sweden
Date: 20 August 2025
Time: 15:00 – 15:15
Place: Wallenberg Conference Centre
DeepTrack2 is a flexible and scalable Python library designed to generate physics-based synthetic microscopy datasets for training deep learning models. It supports a wide range of imaging modalities, including brightfield, fluorescence, darkfield, and holography, enabling the creation of synthetic samples that accurately replicate real experimental conditions. Its modular architecture empowers users to customize optical systems, incorporate optical aberrations and noise, simulate diverse objects across various imaging scenarios, and apply image augmentations. DeepTrack2 is accompanied by a dedicated GitHub page, providing extensive documentation, examples, and an active community for support and collaboration: https://github.com/DeepTrackAI/DeepTrack2.
Soft Matter Lab members present at SPIE Optics+Photonics conference in San Diego, 3-7 August 2025
The Soft Matter Lab participates to the SPIE Optics+Photonics conference in San Diego, CA, USA, 3-7 August 2025, with the presentations listed below.
- Antonio Ciarlo: Probing fluid dynamics inertial effects of particles using optical tweezers
4 August 2025 • 11:45 AM – 12:00 PM PDT | Conv. Ctr. Room 3 - Hari Prakash Thanabalan: Inchworm inspired soft robot locomotion based on groove-guided locomotion
5 August 2025 • 8:30 AM – 8:45 AM PDT | Conv. Ctr. Room 4 - Antonio Ciarlo: miniTweezer: an autonomous high-throughput optical tweezers platform for force spectroscopy (Invited Paper)
5 August 2025 • 9:45 AM – 10:15 AM PDT | Conv. Ctr. Room 4 - Alex Lech: Deeplay: enhancing PyTorch with customizable and reusable neural networks
5 August 2025 • 12:00 PM – 12:15 PM PDT | Conv. Ctr. Room 4 - Mirja Granfors: DeepTrack2: physics-based microscopy simulations for deep learning
5 August 2025 • 2:45 PM – 3:00 PM PDT | Conv. Ctr. Room 4 - Martin Selin: Advanced autonomous optical tweezers experiments
5 August 2025 • 4:30 PM – 4:45 PM PDT | Conv. Ctr. Room 4 - Berenice García: Optical fingerprinting of biomolecular condensates
5 August 2025 • 5:00 PM – 5:15 PM PDT | Conv. Ctr. Room 4 - Anoop C. Patil: From Spectra to Stress: Unsupervised Deep Learning for Plant Health Monitoring
6 August 2025 • 10:30 AM – 11:00 AM PDT | Conv. Ctr. Room 4 - Yu-Wei Chang: BRAPH 2: a flexible, open-source, reproducible, community-oriented, easy-to-use framework for replicable network analysis in neurosciences
6 August 2025 • 11:00 AM – 11:15 AM PDT | Conv. Ctr. Room 4 - Daniela Pérez Guerrero: Quantitative analysis of dynamic biofilm structures via time-resolved droplet microfluidics and artificial intelligence
6 August 2025 • 2:30 PM – 2:45 PM PDT | Conv. Ctr. Room 4 - Martin Selin: Mapping the adsorption dynamics of core-shell particles at liquid-liquid interfaces with optical tweezers
6 August 2025 • 4:30 PM – 4:45 PM PDT | Conv. Ctr. Room 3 - Mirja Granfors: Global graph features unveiled by unsupervised geometric deep learning
7 August 2025 • 2:45 PM – 3:00 PM PDT | Conv. Ctr. Room 4
Giovanni Volpe, who serves as Symposium Chair for the SPIE Optics+Photonics Congress in 2025, is a coauthor of the following invited presentations:
- Blanca Zufiria Gerbolés: (Invited Paper) Computational memory capacity predicts aging and cognitive decline
7 August 2025 • 11:15 AM – 11:45 AM PDT | Conv. Ctr. Room 4 - Bohdan Yeroshenko: (Invited Paper) Pushing the limits of label-free single-molecule characterization by nanofluidic scattering microscopy
5 August 2025 • 8:45 AM – 9:15 AM PDT | Conv. Ctr. Room 4
Giovanni Volpe will also be the reference presenter of the following Poster contributions:
- Agnese Callegari: (Poster) Dense neural networks for geometrical optics
4 August 2025 • 5:30 PM – 7:30 PM PDT | Conv. Ctr. Exhibit Hall A - Agnese Callegari: (Poster) Experimenting with macroscopic active matter
4 August 2025 • 5:30 PM – 7:30 PM PDT | Conv. Ctr. Exhibit Hall A
Presentation by M. Granfors at SPIE-ETAI, San Diego, 7 August 2025

Mirja Granfors, Jesús Pineda, Blanca Zufiria Gerbolés, Joana Pereira, Carlo Manzo, and Giovanni Volpe
Date: 7 August 2025
Time: 2:45 PM – 3:00 PM
Place: Conv. Ctr. Room 4
Graphs are used to model complex relationships, such as interactions between particles or connections between brain regions. The structural complexity and variability of graphs pose challenges to their efficient analysis and classification. Here, we propose GAUDI (Graph Autoencoder Uncovering Descriptive Information), a graph autoencoder that addresses these challenges. GAUDI is trained in an unsupervised manner to capture the most critical parameters of graphs in the latent space, thereby enabling the extraction of essential parameters characterizing the graphs. We demonstrate the performance of GAUDI across diverse graph data originating from complex systems, including the estimation of the parameters of Watts-Strogatz graphs, the classification of protein assembly structures from single-molecule localization microscopy data, the analysis of collective behaviors, and correlations between brain connections and age. This approach offers a robust framework for efficiently analyzing and interpreting complex graph data, facilitating the extraction of meaningful patterns and insights across a wide range of applications.
Invited Presentation by B. Zufiria-Gerbolés at SPIE-ETAI, San Diego, 7 August 2025

Blanca Zufiria-Gerbolés, Mite Mijalkov, Ludvig Storm, Dániel Veréb, Zhilei Xu, Anna Canal-Garcia, Jiawei Sun, Yu-Wei Chang, Hang Zhao, Emiliano Gómez-Ruiz, Massimiliano Passaretti, Sara Garcia-Ptacek, Miia Kivipelto, Per Svenningsson, Henrik Zetterberg, Heidi Jacobs, Kathy Lüdge, Daniel Brunner, Bernhard Mehlig, Giovanni Volpe, Joana B. Pereira
SPIE-ETAI, San Diego, CA, USA, 3 – 7 August 2025
Date: 7 August 2025
Time: 11:15 AM – 11:45 AM PDT
Place: Conv. Ctr. Room 4
Using reservoir computing and diffusion-weighted imaging, we explored changes in brain connectivity patterns and their impact on cognition during aging. We found that whole-brain networks perform optimally at low densities, with performance decreasing as network density increases, particularly in regions with weaker connections. This decline was strongly associated with age and cognitive performance. Our results suggest that a core network of anatomical hubs is essential for optimal brain function, while peripheral connections are more vulnerable to aging. This study highlights the potential of reservoir computing for understanding age-related cognitive decline.
Reference
Mite Mijalkov, Ludvig Storm, Blanca Zufiria-Gerbolés, Dániel Veréb, Zhilei Xu, Anna Canal-Garcia, Jiawei Sun, Yu-Wei Chang, Hang Zhao, Emiliano Gómez-Ruiz, Massimiliano Passaretti, Sara Garcia-Ptacek, Miia Kivipelto, Per Svenningsson, Henrik Zetterberg, Heidi Jacobs, Kathy Lüdge, Daniel Brunner, Bernhard Mehlig, Giovanni Volpe, Joana B. Pereira, Computational memory capacity predicts aging and cognitive decline
Nature Communications 16, 2748 (2025)
Presentation by M.Selin at SPIE-OTOM, San Diego, 6 August 2025

Martin Selin, Maret Ickler, Gerardo Campos-Villalobos, Fabrizio Camerin, Nicolas Vogel, Antonio Ciarlo, Giovanni Volpe, and Marcel Rey
Date: 6 August 2025
Time: 4:30 PM – 4:45 PM PDT
Place: Conv. Ctr. Room 3
Colloidal systems are integral to industries such as food and cosmetics, where liquid-liquid interfaces—like oils dispersed in water—are common. Whether colloidal particles adsorb to these interfaces depends on multiple factors such as particle surface chemistry, pH and salinity.
Here, we investigate how core–shell particles breach a liquid-liquid interface by using optical tweezers to gently push the particles into dodecane-water interfaces formed by microbubbles. Our core–shell particles feature a silica core and a PDMAEMA shell and by varying the amount of monomer added during synthesis the size of the shell can be tuned. Using the tweezers we measure the extent of the polymer shell. Importantly, we find that uncoated silica particles do not adsorb in pure water, whereas polymer coated particles absorb rapidly once the polymer layer contacts the interface, also when the core itself remains microns away. The longer the polymer the greater the distance from which the particle absorbs.
We also observe similar adsorption other polymer shells like PNIPAM and PVP, indicating that the presence of a polymer coating, rather than its specific chemical composition, is the key factor governing adsorption. At low and high pH the polymer shell contracts, also the binding energy becomes weaker making the absorption slower. In very acidic conditions the binding is so weak that the optical tweezers can pull particles out from the interface, allowing us to directly observe individual polymers detaching. These findings provide new insight into how polymer coatings dictate particle-interface interactions, paving the way for improved control of colloidal behavior.