Results 1 to 10 of about 214,638 (308)

Approximation Solution for the Zener Impact Theory [PDF]

open access: yesMathematics, 2021
Collisions can be classified as completely elastic or inelastic. Collision mechanics theory has gradually developed from elastic to inelastic collision theories.
Ping-Kun Tsai   +4 more
doaj   +2 more sources

The Semiclassical Limit of the Gailitis Formula Applied to Electron Impact Broadening of Spectral Lines of Ionized Atoms

open access: yesAtoms, 2021
The present paper revisits the determination of the semi-classical limit of the Feshbach resonances which play a role in electron impact broadening (the so-called “Stark“ broadening) of isolated spectral lines of ionized atoms. The Gailitis approximation
Sylvie Sahal-Bréchot
doaj   +1 more source

Misinformation Correction Maximization Problem with Edge Addition in Social Networks [PDF]

open access: yesJisuanji kexue, 2022
The popularity of online social networks such as Wechat has aroused people’s more attention to information diffusion.The spread of misinformation in social networks may lead to serious consequences,such as economic losses and public panic.Therefore ...
SONG Xin-yue, SHUAI Tian-ping, CHEN Bin
doaj   +1 more source

The correction of Inelastic Neutron Scattering data of organic samples using the Average Functional Group Approximation [PDF]

open access: yesEPJ Web of Conferences, 2022
The use of the Average Functional Group Approximation for self-shielding corrections at inelastic neutron spectrometers is discussed. By taking triptindane as a case study, we use the above-mentioned approximation to simulate a synthetic dynamic ...
Preziosi Enrico   +3 more
doaj   +1 more source

Holographic neutrino transport in dense strongly-coupled matter

open access: yesJournal of High Energy Physics, 2023
A (toy) model for cold and luke-warm strongly-coupled nuclear matter at finite baryon density, is used to study neutrino transport. The complete charged current two-point correlators are computed in the strongly-coupled medium and their impact on ...
M. Järvinen   +3 more
doaj   +1 more source

Deep Minima in the Triply Differential Cross Section for Ionization of Atomic Hydrogen by Electron and Positron Impact

open access: yesAtoms, 2020
We investigate ionization of atomic hydrogen by electron- and positron-impact. We apply the Coulomb–Born (CB1) approximation, various modified CB1 approximations, the three body distorted wave (3DW) approximation, and the time-dependent close-coupling ...
C. M. DeMars   +4 more
doaj   +1 more source

Widths and Shifts of Isolated Lines of Neutral and Ionized Atoms Perturbed by Collisions With Electrons and Ions: An Outline of the Semiclassical Perturbation (SCP) Method and of the Approximations Used for the Calculations

open access: yesAtoms, 2014
“Stark broadening” theory and calculations have been extensively developed for about 50 years. The theory can now be considered as mature for many applications, especially for accurate spectroscopic diagnostics and modeling, in astrophysics, laboratory ...
Sylvie Sahal-Bréchot   +2 more
doaj   +1 more source

Impact of Commutation Failure Preventions on HVDC System Based on a Multi-Index Value Set Approach

open access: yesIEEE Access, 2021
This paper proposes a systematic method, based on rational approximation and value set approach, to unravel the impact of commutation failure preventions (CFPREVs) on HVDC system dynamics.
Minquan Chen   +3 more
doaj   +1 more source

Stark Broadening from Impact Theory to Simulations

open access: yesAtoms, 2017
Impact approximation is widely used for calculating Stark broadening in a plasma. We review its main features and different types of models that make use of it.
Roland Stamm   +8 more
doaj   +1 more source

The Second Workshop on Lineshape Code Comparison: Isolated Lines

open access: yesAtoms, 2014
In this work, we briefly summarize the theoretical aspects of isolated line broadening. We present and discuss test run comparisons from different participating lineshape codes for the 2s-2p transition for LiI, B III and NV.
Spiros Alexiou   +6 more
doaj   +1 more source

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