Université Paris Sciences et Lettres

Routing to the seizure in postoperative human glioma cortex: spatio-temporal uncoupling between slow and fast extracellular neuronal activities

Abstract Background Diffuse gliomas are frequently associated with epilepsy, particularly in low-grade variants. Seizures are key events to be considered in glioma management, including during surgery. Optimizing resection of epileptic areas may affect not only postoperative epil...

A 4200-hour HyperFlash and ÉCLAT campaign on the hyperactive FRB 20240114A: constraining energetics with the most brilliant bursts

Abstract Hyperactive repeaters provide a unique window into the evolving environments and energy budgets of fast radio burst (FRB) sources, though they may not be representative of the FRB population in general. High-cadence observations are key to capturing the rarest and most e...

Population-Based Discrimination of Classical and Few-Photon Microwave Fields with a Flux-Tunable Transmon Qudit

Interactions between few-photon microwave fields and superconducting artificial atoms provide a method to study photon statistics and manipulate quantum states for photonic quantum information processing. Superconducting transmons couple to microwave fields through an anharmonic...

Change in the demographic dynamics of a spatially structured population of a colonial waterbird after a perturbation affecting a large colony

Localized perturbations may affect spatially structured populations (SSPs) as a whole by altering dispersal between patches. Yet, such large-scale consequences remain poorly understood and may depend on the proportion of the SSP affected by the perturbation. Here, we used correla...

Decoding multiway gravitational junctions in AdS in terms of holographic quantum maps

A bstract It has been shown that multiway junctions gluing n copies of locally AdS 3 spacetimes ( n ≥ 2) can be described by n − 1 strings obeying non-linear Nambu-Goto equations coupled by Monge-Ampère like terms. Here we study how such junctions along with their stringy degrees...

Boron Monofluoride Complexes Bearing π‐Expanded Coumarin Subunits: Facile Synthesis, Crystal Structure, and Solid‐State Enhanced Emission

Boron-containing compounds have received special interest over the last few years owing to their favorable photophysical characteristics, stimulating their use as fluorescent sensors, in bioimaging and mechanofluorochromic materials. However, their synthesis is often time-consumi...

Breaking the Blend: A multi-tracer kinematic decomposition method for IFS data applied to disentangling the AGN outflow and circumnuclear ring in NGC 5728 with JWST

Abstract Integral field spectroscopy (IFS) of the central kiloparsecs of active galactic nuclei (AGN) reveals a mixture of spatially coincident emission from star-formation and AGN feedback exciting the interstellar medium. Disentangling these components remains a challenge, as m...

Influence of Exchange–Correlation Functional on Machine-Learned Interatomic Potentials’ Accuracy: A Systematic Study of Borosilicate Glasses

Abstract Machine-learned interatomic potentials (MLIPs) have emerged as a strategy to accelerate molecular simulations, offering the promise of quantum chemical accuracy at a cost close to that of classical force fields. They are commonly trained on reference data obtained at the...

Computational identification and experimental validation of early glycinergic impairments in spinal muscular atrophy

Spinal Muscular Atrophy (SMA) is a progressive neurodegenerative disorder characterized by lower motor neuron (MN) loss, due to mutations or deletions in the Survival Motor Neuron 1 ( SMN1 ) gene. Increasing evidence implies mitochondrial dysfunctions in SMA, suggesting these org...

NKCC1 coordinates SPAK-PP1 signalling to regulate KCC2 membrane stability and seizure susceptibility.

Chloride homeostasis, and thereby the efficacy of chloride-permeable GABAA receptor signaling, depends on the dynamic balance between NKCC1 (Na+-K+-2Cl- cotransporter 1) and KCC2 (K+-Cl- cotransporter 2), which respectively mediate chloride influx and extrusion to tightly control...

Universal random matrix behavior of a Fermionic quantum gas

Since its initial use by Wigner in describing heavy atom spectra, random matrix theory (RMT) has found applications and revealed universal laws in diverse physical contexts, from quantum field theory to disordered systems and wireless communications. A particularly compelling app...

From Morse functions to Lefschetz fibrations on cotangent bundles

We prove that, for any Morse function on a compact manifold and any adapted gradient satisfying the Morse–Smale condition, there is a homotopically unique complex-valued symplectic Lefschetz fibration on the cotangent bundle whose restriction to the zero-section is the given func...

Making an Annotated and Curated Corpus of Heliophysics Literature for Named Entity Recognition

Presentation for the DASH/IHDEA 2026 meeting in Dublin, Ireland. It relates about the work of Sébastien Durna, intern at Paris Observatory on the creation of a pre-annotated corpus for heliophysics named entity recognition using language models, and the thesis of Liza Fretel on t...

The Molecular Origin of Perylene Fluorescence in Gas, Solution and Crystal Phases: A Comparative Theoretical Study

Abstract Perylene is a widespread molecular motif in materials science thanks to its phase-dependent optical response and its good excitation transport properties, making it ideal for many optoelectronic applications. However, the molecular-level understanding of how changing the...

PlanktonLake-CEREEP- A Freshwater Plankton Image Dataset with Semi-Automated Label Cleaning

Plankton plays a fundamental role in aquatic ecosystems, influencing biogeochemical cycles and serving as a key food source for many organisms. Recent high-throughput imaging technologies enable the rapid acquisition of large volumes of microscopic images, creating new opportunit...

Two-dimensional topological quantum chemistry and catalog of topological materials

Two-dimensional (2D) topological materials host symmetry-protected, disorder-robust edge states central to quantum technologies. Yet they remain scarce compared with their 3D counterparts. We adapted the topological quantum chemistry formalism to layer groups and studied the band...

2D theoretically twistable material database

The study of twisted two-dimensional (2D) materials, in which twisting layers create moiré superlattices, has created opportunities for investigating topological phases and strongly correlated physics. The broader potential of a seemingly infinite set of twistable 2D materials re...

Faster Hamiltonian Monte Carlo by learning leapfrog scale: an offline randomized solution

Abstract We introduce a Hamiltonian Monte Carlo (HMC) methodology based on an offline empirical calibration of randomized leapfrog parameters. The approach, referred to as eHMC, where e stands for empirical, leverages importance sampling to construct an empirical distribution on...

A spectral framework for measuring diversity in multiple sequence alignments

Machine learning (ML) methods for proteins and RNAs rely on multiple sequence alignments (MSAs) and related datasets such as experimental mutagenesis libraries, yet the amount of usable information they contain remains unclear. Here, a spectral measure of information is recast in...

Evolution of the Involvement of Researchers From the University of Caen (France) in Author Identifiers and Social Networks: 2019–2023

ABSTRACT As author identifier services (AIDs) and academic social networks (ASNs) have become increasingly central to scholarly communication in the last decade, it is important to study how these tools are being used and how far researchers are involved in these services. This s...