Results 11 to 20 of about 534,393 (266)

E- and F-region coupling between an intense sporadic E layer and a mesoscale traveling ionospheric disturbance [PDF]

open access: yesAnnales Geophysicae, 2009
Considerable controversy exists concerning the relative roles of the E- and F-regions in controlling irregularity formation in the mid-latitude ionosphere, largely because electric fields due to a plasma instability in one region may map to the other ...
W. E. Swartz, M. C. Kelley, N. Aponte
doaj   +3 more sources

Fe-Promoted C-F Activation of Aryl Fluorides Enables Heck-Type Coupling with Alkenes and One-Pot Synthesis of Indenes

open access: yes, 2023
Metal-mediated aryl fluoride activation presents challenges because of the thermodynamically robust C-F bond but also provides opportunities to develop C-C coupling reactions with this unconventional electrophile.
Neal, Mankad, Maxim, Radzhabov
core   +1 more source

Atomistic-to-continuum coupling approximation of a one-dimensional toy model for density functional theory [PDF]

open access: yes, 2013
We consider an atomistic model defined through an interaction field satisfying a variational principle and which can therefore be considered a toy model of (orbital-free) density functional theory.
Langwallner, Bernhard   +2 more
core   +1 more source

Concentration inequalities for random fields via coupling [PDF]

open access: yes, 2007
We present a new and simple approach to concentration inequalities in the context of dependent random processes and random fields. Our method is based on coupling and does not use information inequalities.
Chazottes, J. R.   +8 more
core   +1 more source

Nighttime Midlatitude E‐F Coupling in Geomagnetic Conjugate Ionospheres: A Double Thin Shell Model and a Multi‐Source Data Investigation [PDF]

open access: yes, 2023
Geomagnetic conjugate mid-latitude nighttime ionospheres are frequently simultaneously populated with electrified nighttime medium-scale traveling ionospheric disturbances (MSTIDs).
Tatsuhiro Yokoyama   +9 more
core   +1 more source

Traces of electron-phonon coupling in one-dimensional cuprates

open access: yesNature Communications, 2023
The appearance of certain spectral features in one-dimensional (1D) cuprate materials has been attributed to a strong, extended attractive coupling between electrons.
Ta Tang   +4 more
doaj   +1 more source

E 6 Yukawa couplings in F-theory as D-brane instanton effects

open access: yesJournal of High Energy Physics, 2017
At weak coupling the neighborhood of a E 6 Yukawa point in SU(5) GUT F-theory models is described by a non-resolvable orientifold of the conifold. We explicitly show, first directly in IIB and then via a mirror symmetry argument, that in this limit the E
Andrés Collinucci   +1 more
doaj   +1 more source

(In-)stability and stabilisation of QNL-type atomistic-to-continuum coupling methods [PDF]

open access: yes, 2014
We study the stability of ghost force-free energy-based atomistic-to-continuum coupling methods. In 1D we essentially complete the theory by introducing a universally stable a/c coupling as well as a stabilisation mechanism for unstable coupling schemes.
A. V. Shapeev   +5 more
core   +1 more source

Light mediators in anomaly free U (1) X models. Part II. Constraints on dark gauge bosons

open access: yesJournal of High Energy Physics, 2019
We consider experimental constraints in the MeV region in order to determine the parameter space for the U(1) X extension of the Standard Model, presented in the first part of our work. In particular, we focus on the model UV-completed by cold WIMPs.
F. C. Correia, Svjetlana Fajfer
doaj   +1 more source

Day-to-day variation of pre-reversal enhancement in the equatorial ionosphere based on GAIA model simulations

open access: yesEarth, Planets and Space, 2020
Using a whole atmosphere–ionosphere coupled model GAIA (ground-to-topside model of atmosphere and ionosphere), we have investigated which parameters mainly control day-to-day variation of vertical plasma drift at the evening terminator over magnetic ...
Priyanka Ghosh   +3 more
doaj   +1 more source

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