Zobrazeno 1 - 10
of 1 508
pro vyhledávání: '"P. Fillion"'
Autor:
Corless, Robert M., Fillion, Nicolas
The classical WKB method (also known as the WKBJ method, the LG method, or the phase integral method) for solving singularly perturbed linear differential equations has never, as far as we know, been looked at from the structured backward error (BEA)
Externí odkaz:
http://arxiv.org/abs/2412.00861
Autor:
Lytova, Marianna, Fillion-Gourdeau, François, Vallières, Simon, Fourmaux, Sylvain, Légaré, François, MacLean, Steve
Recent experimental and theoretical results have demonstrated the possibility of accelerating electrons in the MeV range by focusing tightly a few-cycle laser beam in ambient air. Using Particle-In-Cell (PIC) simulations, this configuration is revisi
Externí odkaz:
http://arxiv.org/abs/2408.09052
Autor:
Hacquard, Antoine B., Torres-Diaz, Daniela, Basalgète, Romain, Toulouse, Delfina, Féraud, Géraldine, Del Fré, Samuel, Noble, Jennifer A., Philippe, Laurent, Michaut, Xavier, Fillion, Jean-Hugues, Lafosse, Anne, Amiaud, Lionel, Bertin, Mathieu
Publikováno v:
Phys. Chem. Chem. Phys., 2024
CO$_2$ is a major component of the icy mantles surrounding dust grains in planet and star formation regions. Understanding its photodesorption is crucial for explaining gas phase abundances in the coldest environments of the interstellar medium irrad
Externí odkaz:
http://arxiv.org/abs/2406.17596
Relativistic electrons from vacuum laser acceleration using tightly focused radially polarized beams
Autor:
Powell, Jeffrey, Jolly, Spencer W., Vallières, Simon, Fillion-Gourdeau, François, Payeur, Stéphane, Fourmaux, Sylvain, Piché, Michel, Ibrahim, Heide, MacLean, Steve, Légaré, François
We generate a tabletop pulsed relativistic electron beam at 100 Hz repetition rate from vacuum laser acceleration (VLA) by tightly focusing a radially polarized beam into a low-density gas. We demonstrate that strong longitudinal electric fields at t
Externí odkaz:
http://arxiv.org/abs/2402.08009
The scattered field formalism is combined to the particle-in-cell method to model relativistic laser-plasma dynamics in complex field configurations. Despite the strong nonlinearity of the interactions, we demonstrate the validity of this technique t
Externí odkaz:
http://arxiv.org/abs/2310.11393
Autor:
Basalgète, R., Torres-Díaz, D., Lafosse, A., Amiaud, L., Féraud, G., Jeseck, P., Philippe, L., Michaut, X., Fillion, J. -H., Bertin, M.
Publikováno v:
A&A 676, A13 (2023)
X-rays emitted from pre-main-sequence stars at the center of protoplanetary disks can induce nonthermal desorption from interstellar ices populating the cold regions. This X-ray photodesorption needs to be quantified for complex organic molecules (CO
Externí odkaz:
http://arxiv.org/abs/2306.13048
Publikováno v:
Environmental Health, Vol 23, Iss 1, Pp 1-13 (2024)
Abstract Background Between 1962 and 1975, a chlor-alkali plant in Canada discharged approximately 9 metric tons of mercury (Hg) into the Wabigoon River. Over the following decades, biomarkers of Hg exposure of persons from Grassy Narrows First Natio
Externí odkaz:
https://doaj.org/article/9d33189dafe247519af6c3347eac6815
Autor:
Fillion, Nicolas, Corless, Robert M.
This article aims to explain essential elements of perturbation theory and their conceptual underpinnings. It is not meant as a summary of popular perturbation methods, though some illustrative examples are given to underline the main methodological
Externí odkaz:
http://arxiv.org/abs/2212.07380
Publikováno v:
Environmental Health, Vol 23, Iss 1, Pp 1-14 (2024)
Abstract Background Since the 1960’s, mercury (Hg) contamination of the aquatic environment of Asubpeeschoseewagong Anishinabek (Grassy Narrows First Nation) territories has impacted the community members’ traditions, culture, livelihood, diet an
Externí odkaz:
https://doaj.org/article/de368455857042e2ac12feb2d6afbd8f
We propose organisation conditions that yield a method for training SOM with adaptative neighborhood radius in a variational Bayesian framework. This method is validated on a non-stationary setting and compared in an high-dimensional setting with an
Externí odkaz:
http://arxiv.org/abs/2208.11337