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606 results on '"Virot P"'

2. Generating a highly uniform magnetic field inside the magnetically shielded room of the n2EDM experiment

Author

Abel, C., Ayres, N. J., Ban, G., Bison, G., Bodek, K., Bondar, V., Bouillaud, T., Bowles, D. C., Caratsch, G. L., Chanel, E., Chen, W., Chiu, P.-J., Crawford, C., Dechenaux, B., Doorenbos, C. B., Emmenegger, S., Ferraris-Bouchez, L., Fertl, M., Flaux, P., Fratangelo, A., Goupillière, D., Griffith, W. C., Grujic, Z., Höhl, D., Kasprzak, M., Kirch, K., Kletzl, V., Komposch, S. V., Koss, P. A., Krempel, J., Lauss, B., Lefort, T., Lejuez, A., Li, R., Meier, M., Menu, J., Michielsen, K., Mullan, P., Mullins, A., Naviliat-Cuncic, O., Pais, D., Piegsa, F. M., Pignol, G., Quemener, G., Rawlik, M., Rebreyend, D., Rienaecker, I., Ries, D., Roccia, S., Rozpedzik, D., Schnabel, A., Schmidt-Wellenburg, P., Segarra, E. P., Severijns, N., Smith, C. A., Svirina, K., Tavakoli, R., Thorne, J., Touati, S., Vankeirsbilck, J., Virot, R., Voigt, J., Wursten, E., Yazdandoost, N., Zejma, J., Ziehl, N., and Zsigmond, G.

Published
2025
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4. A large ‘Active Magnetic Shield’ for a high-precision experiment: nEDM collaboration

Author

Abel, C., Ayres, N. J., Ban, G., Bison, G., Bodek, K., Bondar, V., Bouillaud, T., Chanel, E., Chen, J., Chen, W., Chiu, P. -J., Crawford, C. B., Daum, M., Doorenbos, C. B., Emmenegger, S., Ferraris-Bouchez, L., Fertl, M., Fratangelo, A., Griffith, W. C., Grujic, Z. D., Harris, P., Kirch, K., Kletzl, V., Koss, P. A., Krempel, J., Lauss, B., Lefort, T., Mullan, P., Naviliat-Cuncic, O., Pais, D., Piegsa, F. M., Pignol, G., Rawlik, M., Rienäcker, I., Ries, D., Roccia, S., Rozpedzik, D., Saenz-Arevalo, W., Schmidt-Wellenburg, P., Schnabel, A., Segarra, E. P., Severijns, N., Shelton, T., Svirina, K., Tavakoli Dinani, R., Thorne, J., Virot, R., Yazdandoost, N., Zejma, J., Ziehl, N., and Zsigmond, G.

Published
2023
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7. Insights into the sonochemical synthesis and properties of salt-free intrinsic plutonium colloids.

Author

Dalodière, Elodie, Virot, Matthieu, Morosini, Vincent, Chave, Tony, Dumas, Thomas, Hennig, Christoph, Wiss, Thierry, Dieste Blanco, Oliver, Shuh, David K, Tyliszcak, Tolek, Venault, Laurent, Moisy, Philippe, and Nikitenko, Sergey I

Subjects
Biochemistry and Cell Biology, Other Physical Sciences
Abstract

Fundamental knowledge on intrinsic plutonium colloids is important for the prediction of plutonium behaviour in the geosphere and in engineered systems. The first synthetic route to obtain salt-free intrinsic plutonium colloids by ultrasonic treatment of PuO2 suspensions in pure water is reported. Kinetics showed that both chemical and mechanical effects of ultrasound contribute to the mechanism of Pu colloid formation. In the first stage, fragmentation of initial PuO2 particles provides larger surface contact between cavitation bubbles and solids. Furthermore, hydrogen formed during sonochemical water splitting enables reduction of Pu(IV) to more soluble Pu(III), which then re-oxidizes yielding Pu(IV) colloid. A comparative study of nanostructured PuO2 and Pu colloids produced by sonochemical and hydrolytic methods, has been conducted using HRTEM, Pu LIII-edge XAS, and O K-edge NEXAFS/STXM. Characterization of Pu colloids revealed a correlation between the number of Pu-O and Pu-Pu contacts and the atomic surface-to-volume ratio of the PuO2 nanoparticles. NEXAFS indicated that oxygen state in hydrolytic Pu colloid is influenced by hydrolysed Pu(IV) species to a greater extent than in sonochemical PuO2 nanoparticles. In general, hydrolytic and sonochemical Pu colloids can be described as core-shell nanoparticles composed of quasi-stoichiometric PuO2 cores and hydrolyzed Pu(IV) moieties at the surface shell.

Published
2017

10. Erratum to: Data blinding for the nEDM experiment at PSI

Author

Ayres, N. J., Ban, G., Bison, G., Bodek, K., Bondar, V., Chanel, E., Chiu, P.-J., Crawford, C. B., Daum, M., Emmenegger, S., Ferraris-Bouchez, L., Flaux, P., Grujić, Z., Harris, P. G., Hild, N., Hommet, J., Kasprzak, M., Kermaïdic, Y., Kirch, K., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., Leredde, A., Mohanmurthy, P., Mtchedlishvili, A., Naviliat-Cuncic, O., Pais, D., Piegsa, F. M., Pignol, G., Rawlik, M., Rebreyend, D., Rienäcker, I., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Schnabel, A., Virot, R., Weis, A., Wursten, E., Zejma, J., and Zsigmond, G.

Published
2021
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12. Data blinding for the nEDM experiment at PSI

Author

Ayres, N. J., Ban, G., Bison, G., Bodek, K., Bondar, V., Chanel, E., Chiu, P.-J., Crawford, C. B., Daum, M., Emmenegger, S., Ferraris-Bouchez, L., Flaux, P., Grujić, Z., Harris, P. G., Hild, N., Hommet, J., Kasprzak, M., Kermaïdic, Y., Kirch, K., Komposch, S., Kozela, A., Krempel, J., Lauss, B., Lefort, T., Lemiere, Y., Leredde, A., Mohanmurthy, P., Mtchedlishvili, A., Naviliat-Cuncic, O., Pais, D., Piegsa, F. M., Pignol, G., Rawlik, M., Rebreyend, D., Rienäcker, I., Ries, D., Roccia, S., Rozpedzik, D., Schmidt-Wellenburg, P., Schnabel, A., Virot, R., Weis, A., Wursten, E., Zejma, J., and Zsigmond, G.

Published
2021
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30. Management and long-term outcomes of patients with chronic inflammatory diseases experiencing ST-segment elevation myocardial infarction: The SCALIM registry.

Author

Boukhris, Marouane, Dupire, Nicolas, Dousset, Benjamin, Pradel, Valérie, Virot, Patrice, Magne, Julien, and Aboyans, Victor

Abstract

• Approximately 1 in 20 patients with STEMI had CID. • A history of CID did not affect long-term survival after STEMI. • Corticosteroids appear associated with higher death rates during follow-up in CID. Patients with chronic inflammatory diseases (CIDs) are at increased risk of cardiovascular events. However, the prognostic impact of CID after an acute coronary event has been poorly studied. To examine the effect of history of CID on long-term outcome in patients with ST-segment elevation myocardial infarction (STEMI). We analysed data from SCALIM, a regional registry that prospectively enrolled patients with STEMI between June 2011 and May 2019. The presence of CID (including inflammatory bowel diseases, rheumatic conditions, inflammatory skin diseases, multiple sclerosis, vasculitis and autoimmune diseases) was identified. The primary outcome was all-cause death. Secondary outcomes were cardiovascular death, myocardial infarction, ischaemic stroke, peripheral vascular events and rehospitalization for cardiovascular conditions. Data from 1941 patients with STEMI (mean age 64.8 ± 14.1 years, 75.1% men) were analyzed. The prevalence of any CID was 4.6% (n = 89). After a mean follow-up of 3.4 ± 2.6 years, the overall death rate was 16.2%, with similar 5-year survival between patients with and without CID (74.2% vs. 81.9%, respectively; P = 0.121), with no significant mortality excess (hazard ratio: 1.15, 95% confidence interval: 0.73 − 1.82; P = 0.55). However, among CID patients, 35 (39.3%) were on corticosteroid therapy and showed decreased 5-year survival (52.8% vs. 89.5% without corticosteroids; P = 0.001). We found no increased rate of secondary endpoints, except for peripheral vascular events (5-year survival free of peripheral events: 93.3% vs. 98.6% in those without CID; P = 0.005). Approximately 1 in 20 patients with STEMI has CID. We found no effect of CID on long-term survival. However, patients on corticosteroid therapy appeared to have higher rates of death during follow-up. Whether this finding is related to the use of corticosteroids or to the more progressive nature of their condition warrants further investigation. [ABSTRACT FROM AUTHOR]

Published
2022
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45. A detonation run-up distance database: Data-driven existing models improvement and new model development.

Author

Mejía-Botero, C., Virot, F., da Silva, L.F. Figueira, and Melguizo-Gavilanes, J.

Abstract

A comprehensive database of detonation run-up distances (x DDT) in unobstructed tubes/channels is compiled. Eight fuels are included, i.e. , hydrogen, methane, ethane, ethylene, acetylene, propane, butane and carbon monoxide. Oxygen is used as oxidizer with different diluents under a wide range of tube/channel sizes. In total 559 points are collected and analyzed. The global x DDT trends observed in the data as a function of the initial conditions (i.e. , fuel type, equivalence ratio (ϕ), hydraulic diameter (D h), and pressure (p)) reveal that x DDT decreases with increasing p , decreasing D h , and ϕ → 1. The correlation of the normalized run-up distance x DDT / D h with geometrical parameters and fundamental combustion properties shows that most of the variance in the experimental data can be captured by the ratio of D h to the flame thickness ( D h / δ f ), the expansion ratio (σ − 1) and that of the Chapman–Jouguet to the laminar flame speed ( V CJ / σ s L ). With these, a non-linear (NLM) and a logarithmic model (LM) are proposed using a non-linear least squares regression to fit a user-defined function. The NLM and LM are shown to outperform the widely used Silvestrini and Dorofeev models by a large margin since they are capable of explaining ∼ 70 – 80 % of the variance in the experimental x DDT / D h data in contrast to only ∼ 20 % of the original Silvestrini and Dorofeev models. The poor performance of the original models is due to the limited amount of data used to determine the models constants. An update to these constants is also carried out using the database collected in this work resulting in a notable improvement of their predictive capabilities over the original models. The database is publicly available so that it can be used freely to guide future research in the combustion community (e.g. , by identifying conditions where there is a lack of data), and as a test bed for further data-driven model development. [ABSTRACT FROM AUTHOR]

Published
2024
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46. CHRONIQUE DES ARCHIVES 2017-2018.

Author

LABADIE, J.-C., MONÉ, J.-B., DUVIGNEAU, M., CAINAUD, M.-H., PONTIER, M.-C., CLAIR, S., BAUDAT, M., GOUDAIL, A., and VIROT, A.

Abstract

The article informs about archives of French departments published between 2017-2018 on several topics including interregional management of companies, economic competition and public finance.

Published
2019

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