Portail HAL de l'Université du Littoral Côte d'Opale
Not a member yet
11255 research outputs found
Sort by
Quand la résiliation d'un contrat de maintenance emporte la caducité d'un contrat de crédit-bail: note ss. Cass. com., 5 févr. 2025, no 23-16749, in « Droit bancaire – Chronique de jurisprudence »
No full textInternational audienceIl résulte de l’article 1134 du Code civil, dans sa rédaction antérieure à celle issue de l’ordonnance n° 2016-131 du 10 février 2016, que lorsqu’un contrat de crédit-bail et un contrat de maintenance sont interdépendants, la résiliation du second entraîne, à la date à laquelle elle produit ses effets, la caducité du premier
« El dinero de las mujeres. Las mujeres accionistas en las compañías francesas en la época moderna »
No full textInternational audienc
« Pluralité et complémentarité des modes de financement du commerce privilégié au XVIIe siècle »
No full textInternational audienc
The Effect of Physico-Chemical Properties Obtained by Different Preparation Methods on CoCuAl Oxide for CO<sub>2</sub> Purification of Industrial Flue Gas
No full textInternational audienc
La novedad epigáfica : el paisaje en la Lusitania de época augustea
No full textInternational audienceWithin the comparative geographical framework outlined by the conference, this study focuses on the prouincia of Lusitania, established during the Principate of Augustus. Based on an analysis of the earliest Latin inscriptions from this transitional period, the aim is to understand the impact of epigraphic practices on the daily life of this newly established province. Examining these early inscriptions will allow for an exploration of public inscriptions, particularly those related to the monumentalization of the ciuitates, urban development, or commemorations, as well as the organization of rural territory. Additionaly, private contexts, such as funerary texts, will also be considered. This comprehensive overview will help characterize the emerging epigraphic landscape of Roman Lusitania.Dentro del ámbito geográfico comparativo propuesto por el congreso, el presente estudio se centra en la prouincia de Lusitania establecida durante el Principado de Augusto. Basándose en el análisis de las primeras inscripciones latinas de este periodo de transición tan importante, el objetivo es comprender el impacto de la práctica epigráfica en el día a día de la joven provincia. El estudio de estos inicios proporcionará la oportunidad de abordar sucesivamente las inscripciones públicas, especialmente aquellas relacionadas con la monumentalización de las ciuitates y la actividad edilicia o los homenajes, así como la organización de sus territorios en el entorno rural, además de los epígrafes que se generalizan en un contexto privado como los textos funerarios. Este panorama permitirá caracterizar el incipiente paisaje epigráfico de la Lusitania romana
PTFE-Core Flexible Waveguide and Application to High-Data-Rate Interconnects at 80 GHz
No full textInternational audienceThis paper presents the design and experimental validation of a flexible/low-loss waveguide, operating in the single-mode condition from 70 GHz to the upper part of the E-band (86GHz). The waveguide's design and geometric parameters were numerically optimized using EM simulations. The fabrication is done using industrial-grade machines for PTFE extrusion and metal ribbon deposition. Performances of the waveguide are presented (effective index and losses), using vector network analysis in 70−110GHz range. The flexible waveguide is also used as a flexible interconnect for millimeter-waves: in this work, 48 Gbit/s transmission is obtained using a QAM-64 signal centered at 80 GHz
REDOX THERMAL GAS TREATMENT: THE ROLE OF COPPER AND CARBONATE SPECIES IN THE CO2 PURIFICATION OF INDUSTRIAL FLUE GAS
No full textInternational audienceIn recent decades, environmental and human health have become a critical concern due to various atmospheric pollutants mainly greenhouse gases such as CO2. Therefore, it is essential to minimize the amount of CO2 released to the atmosphere by carbon capture facilities for either its utilization or storage. Industrial flue gas is composed of various gases, primarily CO2, combined with other pollutants mainly NO and CO that are harmful to environment and human, as well as oxygen and water vapor. Consequently, and prior to CO2 valorization, CO2 purification is a crucial step to remove both NO and CO using selective catalytic reduction process based on the following reaction: NO + CO → CO2 + ½ N2. Transition metal-based catalysts have shown competitive results compared to noble metals being less expensive. In addition, recent study underlined the effect of various thermal gas treatments (Air, He, 1% CO/He, and CO2) for copper-based catalysts revealing its impact on the catalytic activity of SCR process and highlighted the crucial role of copper species and carbonate content within CO2 purification process. The aim of this study is to synthesize cost effective and efficient copper and cobalt based catalyst, emphasizing the role reduction/oxidation thermal treatment on copper and carbonate species for the SCR process of industrial flue gas under oxidative and wet conditions. The redox treatment performed on Co4Cu2Al2 mixed oxides demonstrated lower temperatures of total CO oxidation at 240 and 260 °C (Figure 1). XRD analysis revealed crystallographic phases of CuO and Cu2O species within redox treated samples that are responsible for the enhancement of CO oxidation. The Co4Cu2Al2 Air R CO-O2 sample showed enhanced NO reduction compared to the air-treated sample reaching 31% of N2 yield at 320 °C (Figure 1) with the formation of CoAl2O4 spinel phase observed by H2-TPR and Raman. When comparing NO reduction temperatures, both redox-treated samples exhibited lower temperature of reduction compared to the air treated sample where TG and FTIR analysis confirmed the presence of mono and polydentate carbonates that play a primary role in NO reduction. On the other hand, CO2 treated Co4Cu2Al2 sample revealed high N2 yield of 37% at 300 °C. The CO-CO2 redox treatment performed promoted lower temperature of N2 production with lower activity due to the formation of surface carbonates active as intermediates for SCR reaction (FTIR and TGA) whereas the implementation of CO-O2 redox treatment decomposed the active carbonates without any spinels formation leading to low N2 yield. Based on further detailed characterization (XPS, …), the relationship between catalytic activity and the role of copper and/or carbonate species will be clearly defined
Neuroplasticity in musical beat processing driven by audiovisual training
No full textInternational audienc
Eco-Efficient Synthesis and In Vitro Evaluation of Vanillin Derivatives for Antifungal Use against Phytopathogens
No full textInternational audienceVanillin is mainly synthesized chemically but holds significant potential for biomass valorization as it can be extracted from lignin. Recognized for its herbicidal, insecticidal, antimicrobial, and antioxidant activities, vanillin can undergo structural modifications that may reinforce these properties. An eco-efficient methodology was tested that allows the synthesis of vanillin derivatives with a yield of up to 60% of purified products. The derivatives were studied for their antifungal effect by inhibition tests on 11 phytopathogens notably infecting wheat and rapeseed. Three out of seven compounds inhibited in vitro mycelial growth by 80% for most of the studied microorganisms at a concentration of 50 mu g mL-1. They displayed in vitro antifungal activity similar to that of the systemic fungicide tebuconazole. Moreover, they showed no phytotoxicity and no cytotoxicity, with significantly higher IC50 values for human skin fibroblasts and bronchial cells than tebuconazole. The broad in vitro antifungal efficiency of these vanillin derivatives, combined with their measured innocuity for plants and human cells, indicates that they could be further studied as potential active substances for alternative non-petro-sourced fungicides to control crop fungal diseases
Grazing-angle ionospheric delays observed during the GNSS-R PRETTY mission
No full textInternational audienceSpaceborne GNSS reflectometry (GNSS-R) has emerged as a valuable technique for surface and atmospheric remote sensing, particularly under grazing-angle geometries where atmospheric effects are amplified. Single-frequency missions such as ESA passive REflecTomeTry and dosimetrY (PRETTY) rely on model-based corrections to account for ionospheric and tropospheric delays. In this study, we exploit PRETTY’s capabilities to perform observations down to 1 degree (at the specular point) to investigate ionospheric effects at very low angles. We analyze six GNSS-R events recorded over the North Polar region in July 2024, focusing on the estimation of the relative ionospheric delay using code delay observations. Comparisons with model-based ionospheric delays from NEDM2020, NeQuick, and IRI show close agreement, with NEDM2020 consistently exhibiting the lowest residual differences, ranging from 1.28 to 4.39 m across all events. This supports the ability of GNSS-R code delay observables to capture the first-order ionospheric delay with reasonable fidelity. Uncertainty analysis reveals that the observed delay fitting process dominates the overall error budget, with additional contributions from tropospheric correction and surface height uncertainty. Furthermore, inversion of the fitted delays using the Chapman layer model yields plausible F-layer parameters, with peak heights ranging from 307 to 367 km and a mean delay RMSE of approximately 1.2 m (~ 4 TECU). Comparisons with ionosonde and EISCAT measurements show differences within ± 15 km. These results demonstrate the potential of single-frequency GNSS-R missions for retrieving ionospheric structure, particularly in remote regions where conventional techniques are limited or unavailable