HAL Université de Toulouse, et Toulouse INP
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XCId : An SSI-Based Cross-Cloud Identity Wallet
No full textInternational audienceCross-cloud is an emerging strategy to run applications seamlessly across different Cloud Service Providers. Even though there are significant benefits such as scalability, compliance or vendor lock-in avoidance, aspects of security interoperability — particularly in the realm of identity management — remains a significant challenge. In this article, we present a novel solution, called XCId, that addresses identity interoperability in cross-cloud environment without relying on intermediaries or third-party brokers. Our approach follows the Self-Sovereign Identity principles to ensure a user-centric identity solution and is built upon existing and widely deployed protocols, allowing interoperability with current Cloud Service Providers technologies. We implemented the framework and tested it on Amazon Web Service, Google Cloud platform and OwnCloud
Comment comprendre les pratiques informationnelles des jeunes peut-il contribuer à améliorer leur éducation aux médias et à l'information ?
No full textInternational audienceSynthèse d'études empiriques issues de la littérature scientifique internationale et francophone sur les pratiques informationnelles non formelles des adolescents. Elle décrit tout d'abord les usages par les adolescents des différents supports et dispositifs pour s’informer dans un cadre non formel, les modalités d’accès à l’information auxquels ils ont recours et leur intérêt pour l’information. Nous examinons ensuite leur pratiques d'évaluation de l'information et leurs rapports aux algorithmes des réseaux sociaux avant de mettre en exergue les différences entre jeunes selon leurs ages et leur milieu socio-culturel. Nous proposons enfin quelques pistes de réflexion sur la prise en compte des pratiques décrites dans le cadre de l’EMI
Impact of socioeconomic individual and ecological factors on extreme diagnosis-to-treatment interval in diffuse large B-Cell lymphoma in the French real-world cohort REALYSA
No full textInternational audienceIntroduction: Diffuse large B-cell lymphoma (DLBCL) is an aggressive though potentially curable lymphoid malignancy requiring timely treatment initiation. We investigated the impact of individual socioeconomic status and home area-level (ecological) factors on the diagnosis-to-treatment interval (DTI) in DLBCL patients, focusing on extreme delays in a French real-world cohort (REALYSA).Methods: We analyzed patients with newly diagnosed DLBCL in the multicentric prospective cohort. DTI was defined as a duration in days between diagnosis confirmation and first-line therapy. Short and long DTIs (10th percentiles) were compared to intermediate DTI using multinomial models to identify factors associated with extreme DTIs. Socio-demographic data (including sex, education, employment, marital status, social support (SSQ6-score)…) and ecological characteristics (French deprivation index, local accessibility to general practitioners) were considered.Results: Among 889 newly diagnosed DLBCL patients (median age 66 years, 49 % with aaIPI ≥1, 35 % with B-symptoms, 33 % with bulky disease), median DTI was 25 days (interquartile range: 15-39 days). The 10th- and 90th-percentile for extreme DTIs were < 8 and > 50 days respectively. In multivariable analysis, factors associated with short DTI included aaIPI (OR=3.03, CI95 %[1.44-6.41]), bulky disease (OR=3.06, CI95 %[1.68-5.58]), and B symptoms (OR=2.35, CI95 %[1.30-4.25]) - indicating expedited treatment for aggressive presentations. Conversely, factors associated with long DTI included older age (OR>80 y = 3.31, CI95 %[1.39-7.89]), being a blue-collar worker or farmer (OR=2.36, CI95 %[1.18-4.73]), or changing type of treatment facility between biopsy and initial treatment.Conclusion: In this large real-world cohort of newly diagnosed DLBCL patients, age, occupational status, and patients' pathway were linked to very long delays to treatment. Interventions to streamline DTIs, especially for older and/or blue-collar or farmer patients, and for those changing facility of treatment, are warranted to improve quality of care
Association of Prolonged Breastfeeding With Early Childhood Caries Using Propensity Score Matching in the French Longitudinal Study of Children ( ELFE Cohort)
No full textInternational audienceABSTRACT Objectives The aim of this study was to investigate the link between prolonged breastfeeding (≥ 12 months) and early childhood caries (ECC) using propensity score matching (PSM) to account for observed confounders, reduce bias, and provide a more reliable estimate of this relationship. Methods This study utilised data from the French Longitudinal Study of Children (ELFE Cohort), comprising 11 718 participants. PSM was employed to pair children who were breastfed for 12 months or longer with those breastfed for less than 12 months or not at all, controlling for shared risk factors such as socioeconomic status and dietary habits. Logistic regression models were conducted to examine the association between ECC, reported by the parents at 3.5 years, and prolonged breastfeeding. Results Infants (7.6%) who were breastfed for 12 months or more exhibited twice the odds of developing ECC at 3.5 years compared to those breastfed for less than 12 months or not at all (OR = 2.20, 95% CI: 1.39, 3.47). Conclusion Children breastfed for 12 or more months are at increased risk of developing ECC. Further research is needed to investigate specific breastfeeding practices that may contribute to this increased risk, with the aim of promoting prolonged breastfeeding while ensuring optimal oral health
Microarchitectural signals analysis platform for the implementation of Hardware Security Counters
No full textInternational audienceDetecting malicious software or hardware behavior during the operation of a computer system requires observables from one or more abstraction layers of the system. This abstraction, however, tends to limit the ability to detect behavioral deviations, especially for attack classes that exploit vulnerabilities very close to the target hardware. Conversely, too low a level of abstraction tends to significantly increase the complexity of the system model, and therefore poses a number of difficulties for the extraction and selection of relevant observables for a given class of attack.Hardware performance counters in particular have been used as an indirect means of observing micro-architecture behavior and detecting software attempting to exploit hardware vulnerabilities. In order to improve the various detection methods, we propose the construction of hardware metrics designed from the outset for security, by studying the correlation between signals from the micro-architecture and the various classes of attack in the literature, targeting both conventional IT and industrial OT systems. By extension, this work aims to detect attacks originating from hardware Trojans, the latter having the effect of changing the behavior of a given micro-architecture
Etablissement des intervalles de référence des variables biochimiques mesurées avec l’automate Catalyst One (Idexx) chez le lapin nain de compagnie : Etude expérimentale
No full textThis study was the first to establish reference intervals for biochemical variables in dwarf pet rabbits using the Idexx laboratory's Catalyst One analyzer, which is used by practising veterinarians, in accordance with international recommendations. To do this, 51 adult dwarf rabbits considered healthy were recruited and sampled in the exotic animal department of the CHUVAC. We obtained the following results: [1.1-2.3]g/L for glucose, [7.2-20.9]mg/L for creatinine, [0.1-0.5]g/L for urea, [58.3-89.4]g/L for total proteins, [31.0-47.7]g/L for albumin, [13.4-124.9]U/L for ALT, [12.0-74.3]U/L for ALP and [553-3704]mg/L for triglycerides. Differences were noted with the data in the literature, due to the analyzers used and the characteristics of the selected populations. It would be appropriate to evaluate, in a complementary study with a larger sample, the influence of breed, age or body size factors.Cette étude a permis d’établir pour la première fois des intervalles de référence des variables biochimiques chez le lapin nain de compagnie avec l’automate Catalyst One du laboratoire Idexx, utilisé par les vétérinaires praticiens, selon les recommandations internationales. Pour cela, 51 lapins adultes nains considérés sains ont été recrutés et prélevés au sein du service NAC du CHUVAC. Nous avons obtenu les résultats suivants : [1,1-2,3]g/L pour le glucose, [7,2-20,9]mg/L pour la créatinine, [0,1-0,5]g/L pour l’urée, [58,3-89,4]g/L pour les protéines totales, [31,0-47,7]g/L pour l’albumine, [13,4-124,9]U/L pour les ALAT, [12,0-74,3]U/L pour les PAL et [553-3704]mg/L pour les triglycérides. Des différences ont été constatées avec les données de la littérature, dues aux analyseurs utilisés et aux caractéristiques des populations choisies. Il conviendrait d’évaluer dans une étude complémentaire avec un échantillon plus grand, l’influence des facteurs race, âge ou gabarit
Agricultural context determines environmental effects of co-product use alternatives in four European regions
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Grazing cover crops: a strategy for enhancing forage autonomy and mitigating soil erosion?
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Iterative effects: a new paradigm for root dynamics
No full textInternational audienceRoots profoundly influence soil carbon storage through root production, turnover, and decomposition over time. While root-derived carbon stabilization in aggregates and minerals is known, the role of slowly decomposing root fragments has been largely overlooked. We propose a new paradigm, 'iterative effects', integrating multigenerational root production and turnover with multistage root decomposition to address the build-up of moderately stable soil carbon forms. To inspire future studies, we develop several heuristic scenarios that differentiate root iterative effects on carbon cycling within branching root systems, across steady-state and non-steady-state ecosystems, under natural and anthropogenic disturbances, and shaped by intra-and intergenerational interactions among root processes. This theoretical framework provides novel insights into soil carbon cycling and ecosystem responses to global changes
Early-Stage Growth of LiNbO 3 on NMC811: Substrate-Induced Challenges and In Situ QCM Insights for Optimized ALD-Based Artificial CEIs
No full textInternational audienceAtomic layer deposition (ALD) has emerged as a cutting-edge technique for fabricating cathode-electrolyte interphase (CEI) layers on cathodic materials, offering precise thickness control and excellent conformality to enhance the stability of highenergy-density lithium-ion batteries. However, despite widespread ALD applications, the early-stage growth dynamics of battery materials remain poorly understood and present unexpected challenges. This study provides novel insights into the nucleation dynamics and early growth behavior of lithium niobium oxide (LiNbO 3 , LNO) on physical vapor deposition (PVD)-sputtered LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) cathode materials using in situ quartz crystal microbalance (QCM) and complementary electron microscopy techniques. The results reveal significant substrate inhibition during initial ALD cycles, leading to island growth, poor surface coverage at low thicknesses, and chemical inhomogeneity. These substrate-induced effects create an interdependence between film thickness and substrate coverage, which compromises artificial CEI effectiveness, particularly at thicknesses below 10 nm. A critical thickness threshold of approximately 13 nm is identified for complete film closure, highlighting a deviation from the ideal layer-by-layer ALD growth and underscoring the strong influence of precursor-surface interactions. Furthermore, this work demonstrates that pulsing sequences play a decisive role in film composition, density, and uniformity. A 1Li:4Nb ratio effectively mitigates compositional gradients caused by the preferential adsorption of lithium tert-butoxide (LiO t Bu) over niobium penta-ethoxide (Nb(OEt) 5 ) on the NMC811 surface. This approach yields nearstoichiometric LiNbO 3 films with enhanced chemical homogeneity and density, whereas a 1Li:1Nb sequence results in chemically graded and porous films. These findings highlight the critical need for optimized ALD strategies to address substrate-induced growth limitations and advance the artificial CEI performance.</div