Scientific Publications of the University of Toulouse II Le Mirail
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Dataset (EBRAINS): MRI and Behavioral Data from a Scene Categorization Task in Patients with Macular Degeneration and Controls (v1)
No full textDataset deposited in the EBRAINS Knowledge GraphThis dataset originates from a study on visual scene categorization in patients with macular degeneration and controls matched for age. It includes structural and functional MRI data acquired during a categorization task with natural scenes filtered in low or high spatial frequencies. Control participants completed the task under an artificial scotoma condition that simulated the central vision loss of patients. Behavioral data are provided in tabular files reporting task performance, including accuracy and response times. Functional data were collected while participants performed the task inside the scanner, and structural data were acquired to support anatomical analyses. All MRI images have been spatially normalized to MNI space using Statistical Parametric Maps (SPM) ([Friston et al., 1994](https://doi.org/10.1002/hbm.460020402); [Evans et al., 2012](https://doi.org/10.1016/j.neuroimage.2012.01.024)), and defacing and skull-stripping were applied to remove facial and skull features to ensure anonymization. While the functional data are mainly tailored to the specific categorization task, the structural MRI scans may be reused for investigating anatomical consequences of central vision loss, such as cortical thickness or volumetric analyses.Access: https://doi.org/10.25493/MR1J-T1KRepository: EBRAINS
Efficient Enumeration of Supported Solutions for General Multi-Objective Optimization Problems
No full textReal-life decision problems often involve multiple objectives, such as the integration of environmental cost and fairness concerns in industry. Since these objectives are usually conflicting, multi-objective optimization aims to enumerate all compromises (Pareto-optimal solutions). One standard approach is to transform the problem into a single-objective one through a weighted sum to benefit from the wide range of available solvers and algorithms. The main challenge is the computation of the weight vectors to enumerate all the supported solutions as many vectors can lead to the same solution. For two objectives, a systematic exploration can be done with a dichotomy scheme. We present the GeneralDichotomy algorithm, that generalizes this method to any number of objectives. It performs incremental exploration and can be combined with any single-objective solver. Our algorithm offers completeness guarantees when the set of solutions is enumerable. Experimentally, it consistently decreases runtime, up to two order of magnitudes. For ease of use, we provide C++ and Python libraries
GaAs solar cell transfer onto copper substrates via thermocompression bonding for photovoltaic thermoelectric hybridization
No full textInternational audienceAbstract For photovoltaic–thermoelectric energy-conversion systems, thermal management is crucial, in particular at the hybrid interfaces in integrated systems, for achieving the best performances. One of the challenges of this integrated PV–TE system is to ensure compatibility in terms of surface area and power generation between PV and TE modules. This work presents the transfer of a 0.5 × 0.5 cm 2 GaAs solar cell onto a copper substrate using Au–Au thermocompression bonding, with a WTi barrier layer to prevent Cu diffusion. Structural integrity and limited interdiffusion were confirmed by scanning electron microscopy. The GaAs substrate was removed via selective etching, and issues with etch selectivity were addressed. Comparison of copper substrates showed that electrodeposited copper offers advantages for scalable bonding. These findings offer a promising approach for efficient thermal management and improving efficiency of integrated photovoltaic–thermoelectric systems
NERdME: a Named Entity Recognition Dataset for Indexing Research Artifacts in Code Repositories
No full textInternational audienceExisting scholarly information extraction (SIE) datasets focus on scientific papers and overlook implementation-level details in code repositories. README files describe datasets, source code, and other implementation-level artifacts, however, their free-form Markdown offers little semantic structure, making automatic information extraction difficult. To address this gap, NERdME is introduced: 200 manually annotated README files with over 10,000 labeled spans and 10 entity types. Baseline results using large language models and fine-tuned transformers show clear differences between paperlevel and implementation-level entities, indicating the value of extending SIE benchmarks with entity types available in README files. A downstream entity-linking experiment was conducted to demonstrate that entities derived from READMEs can support artifact discovery and metadata integration.</div
Fouilles programmées 2023 sur le site de Balchiria (Sartène, Corse du sud) : un centre cérémoniel de l’horizon pré-mégalithique
No full textNational audienceLa découverte fortuite, en 2016, de deux stèles, dont une présentant une iconographie inédite en Méditerranée, a motivé la mise en place d’une série d’opérations de fouilles programmées sur le site de Balchiria, sur la communede Sartène, en Corse-du-Sud. Les opérations conduites entre 2020 et 2023 sous la codirection de la DRAC de Corse et l’Université de Strasbourg, ont permis de contextualiser ces monuments en mettant en évidence plusieursarchitectures de pierres dont certaines peuvent être identifiées à des podiums. Le plus spectaculaire d’entre-deux, de plan naviforme, a conservé une douzaine de petits monolithes découverts en place, encore dressés ou légèrement inclinés. Deux aires empierrées voisines, de plan circulaire ou quadrangulaire sont, en toute hypothèse, assimilées soit à des podiums, soit à des aires cérémonielles
Portrait en jazz
No full textInternational audienceThe musical portraits created by jazz pianist Chick Corea illustrate a possible practice of mimesis in music, as the philosopher Francis Wolff sees it: representation rather than reproduction. In spite of this, while for the musical action itself the presence of a model quickly becomes negligible, for the musician and the audience it proves to be quite necessary.Les portraits musicaux réalisés par le pianiste de jazz Chick Corea illustrent bien une pratique possible de la mimesis en musique telle que la pense le philosophe Francis Wolff : une représentation davantage qu’une reproduction. En dépit de cela, alors que pour l’action musicale en elle-même la présence d’un modèle devient vite négligeable, pour le musicien et l’auditoire il s’avère pourtant bien nécessaire
Uncertain-graph framework for restingstate connectivity analysis in coma
No full textInternational audienceComa leads to persistent cognitive deficits, but underlying network disruptions remain unclear. Resting-state functional connectivity (FC) often probes these changes with graph-based metrics. Traditional graph approaches have key limitations:1. FC edges are based on correlations between regional mean signals, discarding voxel-level variability.2. Graph construction relies on arbitrary thresholds, which may exclude patients with severely disrupted connectivity.To address these challenges, we developed a voxel-informed, probabilistic framework for subject-level networks with finer granularity than traditional thresholded graphs
Assessing the benefits of part-night lighting on a tropical bat species endemic to Reunion Island
No full textInternational audienceArtificial light at night (ALAN) is recognised as an emerging threat to global biodiversity but no technical mitigation strategy can prevent all impacts on ecosystems. Consequently, the most effective measure remains turning-off lights whenever and wherever possible. However, few studies, all carried out in temperate environments, assessed the effectiveness of Part-Night Lighting (PNL) and the benefits that might result from changes in switch-off times. On the tropical Reunion Island, where ALAN is increasing exponentially, we assessed the sensitivity of an endemic bat species (Mormopterus francoismoutoui) to light, and the effectiveness of PNL in reducing the potential impacts on this species, depending on the switch-off times implemented. We took advantage of the modification of an existing PNL during a month-long event, consisting in switching off lights two hours earlier than the rest of the year. By carrying out an acoustic monitoring of bat echolocation calls, using a Before-After Control-Impact Paired protocol, we showed that bats were attracted to lit sites, especially at the beginning and end of the night, when the lights were on. When the lights were switched off earlier in the evening, there was no longer any impact on bat activity and rhythm, although a tendency toward greater activity at the end of the night in lit sites persisted in clear weather. This provides important insights, encouraging extensive use of PNL, ideally with even earlier switch-off times, as a promising measure for mitigating ALAN effects on this endemic species whose overall population vulnerability is still unknown
La "nécrotemie", ou comment discuter différemment des traces de manipulation visibles sur les ossements des défunts
No full textInternational audienc
Potentiel des satellites Pléiades Neo pour restituer la topographie fine des glaciers
No full textInternational audienceLa résolution de 30 cm offerte par les satellites Pléiades Neo représente un gain d’un facteur deux par rapport à leurs prédécesseurs, les Pléiades HR. Combinée avec des capacités stéréoscopiques, elle permet de construire des modèles numériques de terrain (MNTs) métriques pour caractériser finement les reliefs, en particulier pour les petits glaciers, comme ceux des Pyrénées. Dans cette étude, nous évaluons la précision des MNTs déduits d’images Pléiades Neo sur les glaciers de l’Aneto, d’Ossoue et du Monte Perdido en les comparant à des MNTs acquis par drone et aux couvertures Lidar nationales. Nous montrons que les MNTs déduits avec le corrélateur More Global Matching (MGM) sont plus précis que d’autres corrélateurs. Nous soulignons également la capacité des MNTs Pléiades Neo à restituer des détails fins de la morphologie glaciaire comme les moulins sur le glacier d’Ossoue, beaucoup plus difficiles à caractériser avec Pléiades HR