Results 111 to 120 of about 4,448,337 (335)

Towards a model of population of astrophysical sources of ultra-high-energy cosmic rays

, 2012
We construct and discuss a toy model of the population of numerous non-identical extragalactic sources of ultra-high-energy cosmic rays. In the model, cosmic-ray particles are accelerated in magnetospheres of supermassive black holes in galactic nuclei ...
G. T. Zatsepin, G. T. Zatsepin, I. D. Novikov, J. Bicak, J. D. Jackson, K. Ptitsyna, K. V. Ptitsyna, N. I. Shakura, O. E. Kalashev, P. Ghosh, R. L. Znajek, S. V. Troitsky, V. S. Berezinsky   +12 more
core   +1 more source

An OGT Missense Variant With Impaired Enzyme Activity in a Child With Severe Developmental Delay and Hepatoblastoma

American Journal of Medical Genetics Part A, EarlyView.
ABSTRACT O‐GlcNAc transferase (OGT) and its antagonist O‐GlcNAcase (OGA) regulate protein O‐GlcNAcylation, a highly conserved post‐translational modification involved in metabolic sensing. Pathogenic variants in the OGT gene cause an X‐linked congenital disorder of glycosylation (OGT‐CDG) presenting developmental delay, hypotonia, intellectual ...
Alfonso Manuel D'Alessio, Huijie Yuan, Leandro Raul Soria, Sara Basse Hansen, Iolanda Boffa, Paola Arena, Benedetta Attianese, Maureen. O'Sullivan, Noelle Cullinan, Lewis Pang, Daan Marinus Ferdinand van Aalten, Nicola Brunetti‐Pierri, Sally Ann Lynch   +12 more
wiley   +1 more source

Cosmologically safe QCD axion as a present from extra dimension

Physics Letters B, 2015
We propose a QCD axion model where the origin of PQ symmetry and suppression of axion isocurvature perturbations are explained by introducing an extra dimension. Each extra quark–antiquark pair lives on branes separately to suppress PQ breaking operators.
Masahiro Kawasaki, Masaki Yamada, Tsutomu T. Yanagida   +2 more
doaj   +1 more source

Diffuse Galactic Gamma Rays from Shock-Accelerated Cosmic Rays

, 2012
A shock-accelerated particle flux \propto p^-s, where p is the particle momentum, follows from simple theoretical considerations of cosmic-ray acceleration at nonrelativistic shocks followed by rigidity-dependent escape into the Galactic halo.
A. R. Bell, A. R. Bell, C. D. Dermer, Charles D. Dermer, F. W. Stecker, G. F. Krymskii, J. G. Kirk, R. Ramaty, S. Hayakawa, V. L. Ginzburg, V. S. Berezinskii   +10 more
core   +1 more source

A complete model of the cosmic ray spectrum and composition across the Galactic to extragalactic transition [PDF]

, 2015
We present a complete phenomenological model accounting for the evolution of the cosmic-ray spectrum and composition with energy, based on the available data over the entire spectrum.
N. Globus, D. Allard, É. Parizot
semanticscholar   +1 more source

Flow Cytometry: Advances, Challenges and Trends

BioEssays, EarlyView.
Recent advances in flow cytometry span hardware, data processing, and AI‐driven analytics. Emerging modalitiesincluding spectral, imaging, mass, and nano/EV cytometryenable higher‐parameter and small‐particle detection. Integrated machine learning drives a shift from manual gating toward automated multi‐omics workflows.
J. Paul Robinson, Grzegorz B. Gmyrek, Bartek Rajwa   +2 more
wiley   +1 more source

Cosmic-ray protons, nuclei, electrons, and antiparticles under a two-halo scenario of diffusive propagation [PDF]

, 2015
We report calculations of cosmic-ray proton, nuclei, antiproton, electron and positron energy spectra within a "two-halo model" of diffusive transport.
N. Tomassetti
semanticscholar   +1 more source

Physicochemical Characterization of Solid Catalysts: Morphological, Structural, Textural, Reducibility, and Acid‐Base Insights

ChemCatChem, EarlyView.
This review provides a practical guide for the characterization of solid catalysts, emphasizing key techniques such as SEM, TEM, XRD, Raman spectroscopy, and gas physisorption. It also covers reducibility and acid‐based analyses through TPR, TPD, and FTIR.
Luis A. Gallego‐Villada, Julieth T. García‐Sánchez, Gabriela Lauer, Päivi Mäki‐Arvela, Julián E. Sánchez‐Velandia, Dmitry Yu. Murzin   +5 more
wiley   +1 more source

Elastic scattering in geometrical model

Physics Letters B, 2016
The experimental data on proton–proton elastic and inelastic scattering emerging from the measurements at the Large Hadron Collider, calls for an efficient model to fit the data.
Zbigniew Plebaniak, Tadeusz Wibig
doaj   +1 more source

Cosmic rays from supernova remnants and superbubbles

, 2018
Recent high energy gamma-ray observations of both single supernova remnants and superbubbles, together with observations of supernovae, star formation regions, and local cosmic ray composition, now provide an integrated framework tying together the ...
Lingenfelter, Richard E.
core   +1 more source