Results 41 to 50 of about 2,679,470 (331)

On the Background-gyroresonant Character of Bell’s Instability in the Large-current Regime [PDF]

open access: yesAstrophysical Journal, 2018
We show that the Bell instability, which is widely considered potentially important for cosmic-ray (CR) acceleration, is the low-frequency limit of a gyroresonant interaction between the protons of the interstellar medium and shear-Alfvén waves. At large
M. Weidl, D. Winske, C. Niemann
semanticscholar   +1 more source

Unraveling the Nature of Charge Excitations in La$_2$CuO$_4$ with Momentum-Resolved Cu $K$-edge Resonant Inelastic X-ray Scattering

open access: yes, 2010
Results of model calculations using exact diagonalization reveal the orbital character of states associated with different Raman loss peaks in Cu $K$-edge resonant inelastic X-ray scattering (RIXS) from La$_{2}$CuO$_{4}$.
Chabot-Couture, G.   +10 more
core   +1 more source

Direct observation of Dirac cones and a flatband in a honeycomb lattice for polaritons

open access: yes, 2014
Two-dimensional lattices of coupled micropillars etched in a planar semiconductor microcavity offer a workbench to engineer the band structure of polaritons.
Abbarchi, Marco   +9 more
core   +3 more sources

Terahertz spectroscopy of 2,4,6-trinitrotoluene molecular solids from first principles

open access: yesBeilstein Journal of Organic Chemistry, 2018
We present a computational analysis of the terahertz spectra of the monoclinic and the orthorhombic polymorphs of 2,4,6-trinitrotoluene. Very good agreement with experimental data is found when using density functional theory that includes Tkatchenko ...
Ido Azuri   +6 more
doaj   +1 more source

Surface - lattice resonances in 2d arrays of spheres: multipolar interactions and a mode analysis

open access: yes, 2017
We present a multipolar model of surface - lattice resonances (SLRs) in 2d arrays of spheres including the electric dipole, magnetic dipole, and electric quadrupole moments of the spheres.
Sipe, J. E., Swiecicki, Sylvia D.
core   +1 more source

Near-field manipulation of interparticle forces through resonant absorption, optical binding, and dispersion forces [PDF]

open access: yes, 2013
The relative motions of two or more neutral particles, subject to optical trapping forces within a beam, are influenced by intrinsic inter-particle forces.
Andrews, David L., Bradshaw, David S.
core   +1 more source

Engineering Valence Band Dispersion for High Mobility p-Type Semiconductors

open access: yes, 2017
The paucity of high performance transparent p-type semiconductors has been a stumbling block for the electronics industry for decades, effectively hindering the route to efficient transparent devices based on p–n junctions.
B. Williamson   +5 more
semanticscholar   +1 more source

Mesoporous silica supported amine and amine-copper complex for CO2 adsorption: Detailed reaction mechanism of hydrophilic character and CO2 retention

open access: yesJournal of Molecular Structure, 2019
Mesoporous silica SBA-15 was functionalized with various amines and then doped with copper II cation (Cu2+). The modified materials were tested for the retention of CO2 at room temperature using temperature-programmed desorption (CO2-TPD).
Bouhadjar Boukoussa   +9 more
semanticscholar   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen   +23 more
wiley   +1 more source

Dexamethasone for Chemotherapy‐Induced Nausea and Vomiting Prevention in Pediatric Patients: International Consensus

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background An international Delphi panel of experts developed consensus statements to delineate the circumstances where the risks of dexamethasone as an antiemetic do and do not outweigh its benefits. Procedure Experts in supportive care of pediatric patients were invited to participate.
Negar Shavandi   +20 more
wiley   +1 more source

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