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  • Open Access English
    Authors: 
    Hicham Jabraoui; Etienne Paul Hessou; Siwar Chibani; Laurent Cantrel; Sébastien Lebègue; Michael Badawi;
    Publisher: HAL CCSD
    Country: France

    International audience; The ability of Ag-exchanged mordenite (Ag-MOR)to capture iodine species such as I2 and CH3I as released for instance during a nuclear accident could be severely limited by the presence of volatile organic compounds (VOCs)that can disrupt their adsorption in the zeolite. Here, using density functional theory (DFT), we investigate in detail the adsorption process of several hydrocarbons (methane, cyclohexane, benzene, and 1,3-dimethylbenzene)and oxygenated compounds (methanol, ethanol, propan-2-ol and propanone)and compare it with the adsorption of I2 and CH3I for different values of the Si/Al ratio of the Ag-exchanged mordenite. It is found that the adsorption process of the iodine species becomes favorable as the Si/Al ratio is decreased. Indeed at high Si/Al ratio, some VOCs such as benzene, 1, 3-dimethylbenzene and propan-2-ol exhibit strong inhibiting effects, while at low Si/Al ratio, only the adsorption of CH3I is limited by the presence of aromatic hydrocarbons. Also, in addition to the elongation of the I[sbnd]I bond upon the adsorption of the iodine molecule in Ag-MOR with a high silver content, we found that there is a significant electron transfer between the Ag and I atoms. Thus, our results indicate that the I[sbnd]I bond becomes weaker during the adsorption and therefore the formation of AgI precipitates is favored. © 2019 Elsevier B.V.

  • Publication . Part of book or chapter of book . 2018
    English
    Authors: 
    Ivantchik, Askold; Minardi, Michele;
    Publisher: HAL CCSD
    Country: France

    International audience

  • Publication . Conference object . Article . 2021
    Open Access English
    Authors: 
    A. Adil; Ibrahima N'Doye; Ali Zemouche; Abdelghani Hamaz; Taous-Meriem Laleg-Kirati;
    Publisher: HAL CCSD
    Country: France

    Published in IFAC-PapersOnLine, 54(14):96:101, 2021; International audience; The coupled tanks system is a widely used nonlinear system for testing control and estimation methods. This system has various applications such as wastewater treatment, water desalination, pharmaceutical industries, and petrochemical plants. Among the challenging problems is the water level estimation which is needed for controlling the system. In this paper, a high-gain like observer is proposed for the estimation of the water level from delayed output measurement. This observer tolerates a larger bound of the time-delay compared to that obtained by using standard high-gain approach. We show the effectiveness of such observer design and how the standard approach fails to reconstruct the water level in the tanks in the presence of a larger bound on the time-delay.

  • French
    Authors: 
    Angheben, Marcello;
    Publisher: HAL CCSD
    Country: France

    International audience

  • Publication . Preprint . Article . Conference object . 2018
    Open Access English
    Authors: 
    Moser, Daniel; Abele, Hartmut; Bosina, Joachim; Fillunger, Harald; Soldner, Torsten; Wang, Xiangzun; Zmeskal, Johann; Konrad, Gertrud;
    Publisher: HAL CCSD
    Country: France
    Project: FWF | Particles and Interaction... (W 1252)

    The beta decay of the free neutron provides several probes to test the Standard Model of particle physics as well as to search for extensions thereof. Hence, multiple experiments investigating the decay have already been performed, are under way or are being prepared. These measure the mean lifetime, angular correlation coefficients or various spectra of the charged decay products (proton and electron). NoMoS, the Neutron decay prOducts MOmentum Spectrometer, presents a novel method of momentum spectroscopy: it utilizes the $R \times B$ drift effect to disperse charged particles dependent on their momentum in an uniformly curved magnetic field. This spectrometer is designed to precisely measure momentum spectra and angular correlation coefficients in free neutron beta decay to test the Standard Model and to search for new physics beyond. With NoMoS, we aim to measure inter alia the electron-antineutrino correlation coefficient $a$ and the Fierz interference term $b$ with an ultimate precision of $\Delta a/a < 0.3\%$ and $\Delta b < 10^{-3}$ respectively. In this paper, we present the measurement principles, discuss measurement uncertainties and systematics, and give a status update. Comment: 7 pages, 4 figures, accepted to the Proceedings of the International Workshop on Particle Physics at Neutron Sources PPNS 2018, Grenoble, France, May 24-26, 2018

  • French
    Authors: 
    Habib Hadj-Mabrouk;
    Publisher: HAL CCSD
    Country: France

    1. Veille scientifique et positionnement de la recherche dans le contexte national et Européen ;2. Projet scientifique "AMCER" ;3. Travaux actuels et perspectives.

  • Authors: 
    Isabelle GIRAUDOU;
    Country: France

    International audience

  • French
    Authors: 
    Atifi, Hassan;
    Publisher: HAL CCSD
    Country: France

    National audience; Cet article présente les résultats d’une étude de la vidéo de charité en ligne comme nouveau média de solidarité digitale au bénéfice des personnes en situation de vulnérabilité au Maroc . Ces nouveaux modes de solidarités numériques sont diffusés dans l’espace public par des Marocains vulnérables, afin de sensibiliser, susciter l’empathie et déclencher l’aide tangible des e-bienfaiteurs.

  • Open Access English
    Authors: 
    Yulong Fan; Benoit Cluzel; Marlène Petit; Xavier Le Roux; Anatole Lupu; André de Lustrac;
    Publisher: HAL CCSD
    Country: France
    Project: ANR | EIPHI (ANR-17-EURE-0002)

    International audience; Near-field imaging of the propagation of a diffraction-free Bessel-type beam in a guided wave configuration generated by means of a metasurface-based axicon lens integrated on a silicon waveguide is reported. The operation of the axicon lens with a footprint as small as 11 μm2 is based on local engineering of the effective index of the silicon waveguide with plasmonic nanoresonators. This generic approach, which can be adapted to different types of planar lightwave circuit platforms, offers the possibility to design nano-engineered optical devicesbased on the use of plasmonic resonators to control light at the nanoscale.

  • Open Access English
    Authors: 
    Turmo, Araceli;
    Publisher: HAL CCSD
    Country: France

    This Article analyses the recent divergence between the two European Courts on the application of ne bis in idem to double-track procedures from the perspective of judicial dialogue and constitutional pluralism. Although major efforts have been made towards convergence over the past decades, recent case law shows that the potential for conflict - and, possibly, incompatibility - remains wherever the incentive to follow the lead of one authority is insufficient. Pushed to find solutions by the resistance of certain national courts to their converging standards, the European Court of Human Rights and the Court of Justice have chosen very different paths to reach a similar, but not identical, compromise solution. The Article examines the causes of this divergence and its consequences for the protection of this fundamental right in EU Member States. I. A principle of European law. - II. Building coherence across European legal systems. - II.1. The challenging construction of compatible European standards. - II.2. The problem of the idem: what is criminal? - III. The attempted compromise. - IV. The revived schism. - V. Conclusion. European Papers - A Journal on Law and Integration, 2020 5(3), 1341-1356

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