Results 131 to 140 of about 4,292,570 (358)

Testing cosmic ray acceleration with radio relics: a high-resolution study using MHD and tracers [PDF]

open access: yes, 2016
Weak shocks in the intracluster medium may accelerate cosmic-ray protons and cosmic-ray electrons differently depending on the angle between the upstream magnetic field and the shock normal.
D. Wittor, F. Vazza, M. Bruggen
semanticscholar   +1 more source

Signatures of a Two Million Year Old Supernova in the Spectra of Cosmic Ray Protons, Antiprotons, and Positrons. [PDF]

open access: yesPhysical Review Letters, 2015
The locally observed cosmic ray spectrum has several puzzling features, such as the excess of positrons and antiprotons above ~20  GeV and the discrepancy in the slopes of the spectra of cosmic ray protons and heavier nuclei in the TeV-PeV energy range ...
M. Kachelrieß, A. Neronov, D. Semikoz
semanticscholar   +1 more source

Compliant Robotics in Space: A Prospective Review of Soft and Deformable Systems for Space Missions

open access: yesAdvanced Intelligent Systems, EarlyView.
Compliant robots are increasingly becoming integral to space exploration due to their adaptability, flexibility, and lightweight design. This article reviews categories such as soft, reconfigurable, and hyper‐redundant robots and their evolving role in enhancing space missions.
Hamed Rahimi Nohooji, Holger Voos
wiley   +1 more source

Revisiting metastable cosmic string breaking

open access: yesJournal of High Energy Physics
Metastable cosmic strings appear in models of new physics with a two-step symmetry breaking G → H → 1, where π 1(H) ≠ 0 and π 1(G) = 0. They decay via the monopole-antimonopole pair creation inside. Conventionally, the breaking rate has been estimated by
Akifumi Chitose   +4 more
doaj   +1 more source

TeV Instrumentation: Current and Future

open access: yesGalaxies, 2022
During the last 20 years, TeV astronomy has turned from a fledgling field, with only a handful of sources, into a fully-developed astronomy discipline, broadening our knowledge on a variety of types of TeV gamma-ray sources. This progress has been mainly
Julian Sitarek
doaj   +1 more source

The composition of cosmic rays at the knee [PDF]

open access: yesAIP Conference Proceedings, 2002
36 pages, 10 ...
J. W. Cronin   +26 more
openaire   +11 more sources

Analytical Model for Estimating the Zenith Angle Dependence of Terrestrial Cosmic Ray Fluxes

open access: yesPLoS ONE, 2016
A new model called “PHITS-based Analytical Radiation Model in the Atmosphere (PARMA) version 4.0” was developed to facilitate instantaneous estimation of not only omnidirectional but also angular differential energy spectra of cosmic ray fluxes anywhere ...
Tatsuhiko Sato
semanticscholar   +1 more source

Footprint characteristics revised for field‐scale soil moisture monitoring with cosmic‐ray neutrons [PDF]

open access: yes, 2015
Cosmic‐ray neutron probes are widely used to monitor environmental water content near the surface. The method averages over tens of hectares and is unrivaled in serving representative data for agriculture and hydrological models at the hectometer scale ...
M. Kohli   +12 more
semanticscholar   +1 more source

Hereditary Multiple Osteochondromas and Acute Lymphoblastic Leukemia: A Possible Role for EXT1 and EXT2 in Hematopoietic Malignancies

open access: yesAmerican Journal of Medical Genetics Part A, EarlyView.
ABSTRACT Hereditary multiple osteochondromas (HMO) is an autosomal dominant disorder caused by heterozygous deleterious variants in the EXT1 or EXT2 genes. While the clinical core phenotype is well established and mainly consists of bone deformities, limb length discrepancies, multiple benign bone neoplasms, and increased risk of chondrosarcoma, the ...
Francesco Comisi   +7 more
wiley   +1 more source

Impact of transport modelling on the $^{60}$Fe abundance inside Galactic cosmic ray sources [PDF]

open access: yes, 2020
The ACE-CRIS collaboration has recently released the measurement of radioactive $^{60}$Fe nuclei abundance in Galactic Cosmic Rays, in the energy range $\sim 195-500$ MeV per nucleon. We model Cosmic Ray propagation and derive from this measurement the $^{60}$Fe/$^{56}$Fe ratio that is expected in the sources of Galactic Cosmic Rays. We describe Cosmic
arxiv   +1 more source

Home - About - Disclaimer - Privacy