Results 31 to 40 of about 1,129,256 (278)

The Quark Impact Factors

open access: yes, 1999
We calculate in the next-to-leading approximation the non-forward quark impact factors for both singlet and octet color representation in the $t$-channel.
A. Papa   +53 more
core   +1 more source

On models of ground vibrations in strong earthquakes

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2023
Objective. The purpose of these studies is to determine, on the basis of the developed models describing seismic impacts, the most acceptable for acceptance from the point of view of the accuracy of the description of the seismic oscillation both in the ...
H. R. Zainulabidova   +2 more
doaj   +1 more source

Photoassociation spectra and the validity of the dipole approximation for weakly bound dimers

open access: yes, 2010
Photoassociation (PA) of ultracold metastable helium to the 2s2p manifold is theoretically investigated using a non-perturbative close-coupled treatment in which the laser coupling is evaluated without assuming the dipole approximation.
D. M. Brink   +3 more
core   +1 more source

Charge transfer at large scattering angles in the strong potential Born approximation [PDF]

open access: yes, 1983
. We have calculated the Is-Is charge transfer probability for large projectile scattering angles in asymmetric ion-atom collisions, using the strong-potential Born approximation and including the effect of recoil on the projectile states non ...
Amundsen, Per A.   +1 more
core   +1 more source

The Feshbach Resonances Applied to the Calculation of Stark Broadening of Ionized Spectral Lines: An Example of Interdisciplinary Research

open access: yesAtoms
In the present paper, we revisit the determination of Feshbach resonances in the elastic and fine-structure cross-sections of the spectral lines of ionized atoms colliding with electrons.
Sylvie Sahal-Bréchot, Haykel Elabidi
doaj   +1 more source

Approximation to the measurement of Backorder impact on flexible manufacturing systems

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2013
This document studies the implications of considering or not pending orders (hereinafter called "backorders") in production planning, control and configuration models in flexible manufacturing systems (SMF).
Juan-José Bravo   +2 more
doaj   +1 more source

Collision of viscoelastic bodies: Rigorous derivation of dissipative force

open access: yes, 2015
We report a new theory of dissipative forces acting between colliding viscoelastic bodies. The impact velocity is assumed not to be large, to avoid plastic deformations and fragmentation at the impact.
Brilliantov, Nikolai V.   +3 more
core   +1 more source

Vibro-impact of a plate on rigid obstacles: existence theorem, convergence of a scheme and numerical simulations [PDF]

open access: yes, 2012
The purpose of this paper is to describe a fully discrete approximation and its convergence to the continuum dynamical impact problem for the fourth-order Kirchhoff–Love plate model with nonpenetration Signorini contact condition.
Pozzolini, Cédric   +2 more
core   +4 more sources

Imaging of High‐Risk Neuroblastoma: Recommendations From SIOPEN Radiology and Nuclear Medicine Specialty Committees

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Neuroblastoma is the most common extracranial solid tumor in early childhood. Its clinical behavior is highly variable, ranging from spontaneous regression to fatal outcome despite intensive treatment. The International Society of Pediatric Oncology Europe Neuroblastoma Group (SIOPEN) Radiology and Nuclear Medicine Specialty Committees ...
Annemieke Littooij   +11 more
wiley   +1 more source

Measurement and functional approximation of impact pressure distribution in shot peening

open access: yesNihon Kikai Gakkai ronbunshu, 2017
Shot peening is widely applied in the automotive and aerospace industries in order to improve the fatigue strength of the metal components by compressive residual stress.
Takahiro OHTA
doaj   +1 more source

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