PhD Offer on GNN and XAI in Caen (GREYC Lab)

Offre en lien avec l’Action/le Réseau : – — –/– — –

Laboratoire/Entreprise : GREYC UMR 6072
Durée : 3 ans
Contact : bruno.cremilleux@unicaen.fr
Date limite de publication : 2025-06-30

Contexte :
Cf. document attaché

Sujet :
Cf. document attaché

Profil du candidat :
Cf. document attaché

Formation et compétences requises :
Cf. document attaché

Adresse d’emploi :
Université de Caen Normandie (Caen, Normandy, France: GREYC, Campus Côte de Nacre) :

Document attaché : 202504291608_TheseXAIforGraphDataAugmentation_EpitaGREYC.pdf

Neural networks based volcanic model inversion with SAR displacement measurements

Offre en lien avec l’Action/le Réseau : – — –/– — –

Laboratoire/Entreprise : LISTIC
Durée : 36 mois
Contact : yajing.yan@univ-smb.fr
Date limite de publication : 2025-12-31

Contexte :

Sujet :
Satellite based remote sensing offers a unique source of information to monitor the environnement, with fine spatial resolution, wide coverage and frequent revisit. This enables
addressing the challenge of natural hazard monitoring and forecasting, which has a significant societal impact. The inverse modeling of surface displacement is one of the major techniques of exploring the subsurface feature of volcanoes. The traditional Monte Carlo direct search approaches are
computational resources and time consuming, thus cannot respond to operational needs. We will explore the potential of deep learning in volcanic inverse modeling with Interferometry
Synthetic Aperture Radar (InSAR) for operational monitoring and forecasting of volcanic hazards. The intrinsic ill-posedness of inversions in volcanology and limited amount of labeled InSAR data make this work challenging. We tackle the problem of volcanic model inversion, i.e. to estimate model parameters from surface displacement estimations issued from InSAR by solving an inverse problem. This Ph.D thesis will elaborate on our previous proof-of-concept work where a frugal ResNet model was deployed for the first time to estimate the volume change and depth of a spherical volcanic source (i.e. Mogi) from synthetic InSAR displacement fields. This ResNet model exhibits distinct advantages of computational efficiency over the state-of-the-art Monte Carlo direct search methods. For this thesis, the Ph.D student will use more sophisticated volcanic models (e.g. fracture, numerical boundary element models, etc.) allowing for simulations of displacement fields caused by more complex volcanic sources to further increase the generality of the previously proposed ResNet model. One main effort will be devoted to the improvement of the ResNet model prediction accuracy by increasing training data diversity (e.g. divers SAR
acquisition geometries, near field/far field and multi-resolution measurements) and by elaborating more adapted loss functions corresponding to appropriate model properties to optimize (e.g. combination of a loss function of estimated model parameters and a loss function of the reconstructed displacement field). These two latter actions also help minimize the ill-posedness. Real InSAR displacement measurements related to both intrusion and reservoir type worldwide volcanoes will be used to fine-tune the ResNet model trained by synthetic data for
further validation in real applications.

Profil du candidat :
The Ph.D candidate should have good skills in machine learning. Knowledge in inverse problem or geophysics is appreciated.

Formation et compétences requises :

Adresse d’emploi :
LISTIC, 5 chemin de bellevue, 74944, Annecy-le-Vieux

Gender dynamics in collaboration networks

Offre en lien avec l’Action/le Réseau : – — –/Doctorants

Laboratoire/Entreprise : Laboratoire Informatique d’Avignon avec codirect
Durée : 3 ans
Contact : rosa.figueiredo@univ-avignon.fr
Date limite de publication : 2025-12-31

Contexte :
ANR project EVA – EValuating gender policies in academia through the Analysis of scientific collaboration networks.

Sujet :
https://eva.univ-avignon.fr/wp-content/uploads/sites/34/2025/04/offre.pdf

Profil du candidat :
• Master’s degree (or equivalent) in Computer Science, Applied Mathematics, Operations Research, or a related field.
• Strong ability to write and present research clearly.
• Proficiency in Python, R, Julia or C++, with experience in AI and optimization algorithms.
• Good understanding of graph theory, machine learning, and network analysis.
• Ability to work well in an interdisciplinary team.
• Proficiency in English is required, and knowledge of French is an advantage

Formation et compétences requises :

Adresse d’emploi :
LIA, Avignon

Document attaché : 202504251721_offreThesis_EVA.pdf

High-dimensional learning for automatic and robust target detection in hyperspectral imagery

Offre en lien avec l’Action/le Réseau : – — –/– — –

Laboratoire/Entreprise : LIST3N
Durée : 3 ans
Contact : alexandre.baussard@utt.fr
Date limite de publication : 2025-06-24

Contexte :

Sujet :
voir le descriptif de la thèse “High-dimensional learning for automatic and robust target detection in hyperspectral imagery” dans le fichier attaché

Profil du candidat :

Formation et compétences requises :

Adresse d’emploi :
Université de Technologie de Troyes

Document attaché : 202504241217_PhD_target_detection_hyperspectral_imagery.pdf

Hi! PARIS Summer School 2025 (July 7-10 @ Ecole polytechnique)

Date : 2025-07-07 => 2025-07-10
Lieu : Ecole Polytechnique

Dear All,


We are pleased to invite you to the fifth edition of the Hi! PARIS Summer School on July 7-10, 2025 at Ecole polytechnique!

This year’s edition of the Hi! PARIS Summer School will feature several tutorials on a wide range of topics in the domain of Artificial Intelligence and Data Science from different perspectives. These sessions are designed to appeal to a wide audience, including Master’s and PhD students, postdocs, academics, faculty members, researchers, and industry professionals who are looking to deepen their understanding of AI and Data Science.

The program features tutorials on the theory and methods of AI and Data Science, along with keynote presentations by globally recognized academics. Over the course of the four-day event, an industry panel will foster meaningful dialogue between participants and professionals. Additionally, the Hi! PARIS Engineering Team will lead practical sessions offering research tips, further enriching the learning experience.

Certificates of participation will be delivered at the end of the Summer School!

For this 5th edition, Hi! PARIS proposes:

– 4 Keynote Speakers
– 1 Industry Panel with the participation of Hi! PARIS corporate donors
– 6 Tutorials 
– Practical Research Tips Sessions by the Hi! PARIS Engineering Team
– 1 Poster Session and a Poster Award with a cash prize
– 1 Social Event

For more detailed information and to register for this event, visit:  https://www.hi-paris.fr/summer-school-2025/

Already confirmed speakers:

Keynote Speakers:
JEAN-PHILIPPE VERT (Owkin)
LUDOVIC DENOYER (H)
CHARLES-ALBERT LEHALLE (École polytechnique)

Tutorial Speakers:
AYMERIC DIEULEVEUT (École polytechnique)
ANNA KORBA (ENSAE)
ÉMILIE KAUFMANN (CNRS, CRIStAL)
SOLENNE GAUCHER (École polytechnique)

This edition of the Summer School has benefited from a government grant managed by the ANR under France 2030 with the reference “ANR-22-CMAS-0002”.


Hi! PARIS Center
Hi! PARIS, Center in Data Science & AI for Science, Business & Society
contact@hi-paris.fr
+33 (0) 1 75 31 92 03
Office: @Telecom Paris, 5A101 + @HEC Paris, S-107 on Tuesdays

Lien direct


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Unlocking Exascale: A First Look at JUPITER

Date : 2025-04-30
Lieu : Webinaire en ligne (durée 1h)

inscription ici : https://epicure-hpc.eu/2025/04/15/unlocking-exascale-a-first-look-at-jupiter/

The JUPITER Exascale supercomputer, Europe’s first Exascale system, will soon be ready for large-scale computations within the upcoming allocation period at the Jülich Supercomputing Centre. This webinar will provide an overview of JUPITER’s system architecture, technical specification, and pathways to gain access to the machine’s available compute resource. Furthermore, a brief overview of the performance comparison will be presented between the JUWELS Booster production system and JEDI, which is the preparatory system that has identical hardware configuration to JUPITER Booster. There will be a sharing of first-hand experience in porting a plasma physics simulation code to an ARM-architecture based system like JEDI/JUPITER, building software modules required by the application via Easybuild and profiling.

Speakers :

Jolanta Zjupa

Jolanta Zjupa is a research staff member at the Jülich Supercomputing Centre (JSC) in Germany, where she has been focusing on application optimisation, parallelisation, HPC support, and training since 2022. With a background in theoretical and computational astrophysics, she brings a unique perspective to her work in High-Performance Computing. Jolanta holds a PhD in Astrophysics from Universität Heidelberg and worked as a PostDoc at renowned institutions in France and Austria.

Junxian Chew

Junxian Chew is a research staff member of JSC in Germany since 2023. He currently focuses in HPC support, parallel I/O, training and porting applications. Having background in aerospace engineering then pivoting to HPC study of plasma physics in nuclear fusion topic, he brings a solution-oriented mindset to the field of computation physics in HPC environment. He holds a PhD in physics from Ruhr-Universitaet Bochum.

Lien direct


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CfP: MACLEAN: MAChine Learning for EArth ObservatioN (workshop @ECML/PKDD2025)

Date : 2025-09-19
Lieu : Porto, Portugal

MACLEAN: MAChine Learning for EArth ObservatioN

https://sites.google.com/view/maclean25

19 September 2025

KEY DATES

Paper submission deadline: June 14, 2025
Paper acceptance notification: July 14, 2025
Paper camera-ready deadline: TBA

CONTEXT

The huge amount of data currently produced by modern Earth Observation (EO) missions has raised up new challenges for the Remote Sensing communities. EO sensors are now able to offer (very) high spatial resolution images with revisit time frequencies never achieved before considering different kind of signals, e.g., multi-(hyper)spectral optical, radar, LiDAR and Digital Surface Models.
In this context, modern machine learning techniques can play a crucial role to deal with such amount of heterogeneous, multi-scale and multi-modal data. Some examples of techniques that are gaining attention in this domain include deep learning, domain adaptation, semi-supervised approach, time series analysis and active learning.
Even though the use of machine learning and the development of ad-hoc techniques are gaining increasing popularity in the EO domain, we can witness that a significant lack of interaction between domain experts and machine learning researchers still exists.
The objective of this workshop is to supply an international forum where machine learning researchers and domain-experts can meet each other, in order to exchange, debate and draw short and long term research objectives around the exploitation and analysis of EO data via Machine Learning techniques. Among the workshop’s objectives, we want to give an overview of the current machine learning researches dealing with EO data, and, on the other hand, we want to stimulate concrete discussions to pave the way to new machine learning frameworks especially tailored to deal with such data.

TOPICS
– Supervised Classification of Multi(Hyper)-spectral data
– Supervised Classification of Satellite Image Time Series data
– Unsupervised Learning of EO Data
– Deep Learning approaches to deal with EO Data
– Machine Learning approaches for the analysis of multi-scale EO Data
– Machine Learning approaches for the analysis of multi-source EO Data
– Semi-supervised classification approaches for EO Data
– Active learning for EO Data
– Transfer Learning and Domain Adaptation for EO Data
– Interpretability and explainability of machine learning methods in the context of EO data analysis
– Bayesian machine learning for EO Data
– Dimensionality Reduction and Feature Selection for EO Data
– Graphicals models for EO Data
– Structured output learning for EO Data
– Multiple instance learning for EO Data
– Multi-task learning for EO Data
– Online learning for EO Data
– Embedding and Latent factor for EO Data
– Foundation Models for Earth Observation
– Multi-Modal approaches for EO Data
– Self-supervised learning for EO Data
– Physics-informed machine learning for EO Data

INVITED SPEAKERS:

– Prof. Dr. Elif Sertel – Istanbul Technical University, Istanbul, TR, https://web.itu.edu.tr/~sertele/
Keynote title : TBA

SUBMISSION
We welcome original contributions, either theoretical or empirical, describing ongoing projects or completed work. Contributions can be of two types: either short position papers (up to 6 pages including references) or full research papers (up to 10 pages including references). Papers must be written in LNCS format, i.e., accordingly to the ECML-PKDD 2025 submission format. Accepted contributions will be made available electronically through the Workshop web page.
Post-proceedings will be also published at the CCIS (Communications in Computer and Information Science) series.

WORKSHOP WEBSITE:

https://sites.google.com/view/maclean25

SUBMISSION WEBSITE:

https://cmt3.research.microsoft.com/ECMLPKDDWorkshopTrack2025/Submission/Index

PC-CHAIRS

Thomas Corpetti, CNRS, LETG-Rennes COSTEL UMR 6554 CNRS, Rennes, France, thomas.corpetti@cnrs.fr
Roberto Interdonato, CIRAD, UMR Tetis, Montpellier, France, roberto.interdonato@cirad.fr
Cassio Fraga Dantas, INRAE, UMR Tetis, Montpellier, France, cassio.fraga-dantas@inrae.fr
Dino Ienco, INRAE, UMR Tetis, Montpellier, France, dino.ienco@inrae.fr
Minh-Tan Pham, Univ. Bretagne-Sud, UMR 6074, IRISA, Vannes, France, minh-tan.pham@irisa.fr

Lien direct


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Learning to localize anomalies and optimize itineraries through an AI framework for combinatorial optimization in temporal graphs

Offre en lien avec l’Action/le Réseau : – — –/– — –

Laboratoire/Entreprise : LISIC – Univ. Littoral Côte d’Opale
Durée : 3 years
Contact : esteban.bautista@univ-littoral.fr
Date limite de publication : 2025-06-01

Contexte :
Many complex systems — such as the Internet, transportation networks, and financial systems — produce data that naturally takes the form of temporal graphs, where each link between nodes is time-stamped. Temporal graphs allow us to model and analyze interactions over time, such as network traffic between computers, scheduled trips between stations, or transactions between bank accounts. A common challenge in working with such graphs is identifying subsets of the temporal graph that optimize certain properties, like density, cost, duration, etc. These tasks are essential for applications such as anomaly detection, cybersecurity, or route planning, but they typically involve NP-hard combinatorial problems, making them impractical to solve exactly.

This PhD project explores a new direction for tackling these problems using artificial intelligence. While heuristic methods exist, they often struggle to balance speed and accuracy in temporal graph settings. In contrast, recent advances show that AI models can be trained to solve combinatorial problems on static graphs efficiently, yet their potential remains largely unexplored in the temporal graph setting. This project aims to bridge that gap by developing AI-based methods that learn to solve combinatorial optimisation problems emerging on temporal graphs.

Sujet :
This PhD project aims to explore the potential of machine learning methods as a means to solve combinatorial optimization problems on temporal graphs. We target three specific goals:

Goal 1: End-to-end learning framework.
We aim to design a framework that trains neural models to directly map problem instances to solutions in temporal graphs. While such approaches exist for static graphs, our challenge is to extend them to the temporal setting by defining suitable loss functions and training strategies.

Goal 2: A novel filter-based architecture.
We plan to develop a neural architecture that treats optimization as a filtering task — discarding irrelevant links to isolate the optimal subgraph. Building on spectral methods and recent work in temporal graph signal processing, we will explore how filters can be effectively defined and learned in a frequency-structural domain.

Goal 3: High-impact applications.
We will validate our methods on two key applications:

– Anomaly localization: Many systems detect anomalies but fail to pinpoint their origin. We aim to learn to localize anomalies without relying on assumptions about their structure.

– Temporal graph exploration: In transportation networks, finding optimal exploration routes is NP-hard. Our goal is to develop practical AI-based methods that scale better than current approximations.

Profil du candidat :
We look for highly motivated candidates with relevant experience in computer science, graph algorithms, and/or
deep learning. Experience in Python programming and operations research will be a plus.

—— Application ——-

Interested candidates are invited to send an e-mail to

• esteban.bautista@univ-littoral.fr
• rym.guibadj@univ-littoral.fr
• gilles.roussel@univ-littoral.fr

while attaching the documents that can support their application:

• your resume;
• a cover letter;
• your transcripts from the last year of B.Sc to the last year of M.Sc. (if the latter is already available);
• two reference letters or the names and means of contact of two academic advisers.

Applications will be reviewed on a rolling basis until the position is filled.

Formation et compétences requises :

Adresse d’emploi :
LISIC Laboratory – Université du Littoral Côte d’Opale – Site Saint-Omer (Hautes de France), France

Document attaché : 202504141925_PhD_COTEG.pdf