Results 71 to 80 of about 633,557 (183)

Modeling of the Near-Earth Low-Energy Antiproton Fluxes

Advances in Astronomy, 2011
The local interstellar antiproton spectrum is simulated taking into account antineutron decay, (He,p) interaction, secondary and tertiary antiproton production, and the solar modulation in the “force field” approximation.
U. B. Jayanthi, A. A. Gusev
doaj   +1 more source

Long-term evolution of cosmic ray modulation: a comprehensive analysis of solar and heliospheric influences (1964–2024)

New Journal of Physics
This study provides a comprehensive analysis of galactic cosmic ray (GCR) modulation over six decades (1964–2024), covering Solar Cycles 20 through 25.
Rafik Sedrati, Dallel Bouchachi
doaj   +1 more source

Spectral characterisation of shortened pulse position modulation format [PDF]

, 2010
Shortened pulse position modulation (SPPM) is a new modulation format that has recently been proposed for underwater wireless optical communications. A full spectral characterisation of SPPM is considered and original expressions are presented, which ...
Cryan, R.A.
core   +1 more source

Long‐Term Variation of the Galactic Cosmic Ray Radiation Dose Rates

Space Weather
In this work, a model for calculating the galactic cosmic rays (GCRs) radiation dose rate is developed. The model is based on a GCR modulation model, which is established by Shen and Qin, and the fluence‐dose conversion coefficients (FDCCs) published by ...
D. Lyu, G. Qin, Z.‐N. Shen
doaj   +1 more source

Nuclear Data Needs for GCR Shielding Models

, 2023
Lawrence Heilbronn, University of Tennessee, USAICES503: Radiation Issues for Space FlightThe 52nd International Conference on Environmental Systems was held in Calgary, Canada, on 16 July 2023 through 20 July 2023.Fundamental nuclear data, such as ...
Heilbronn, Lawrence
core  

Are the Parker and focused transport equations equivalent for galactic cosmic ray modulation?

Astronomy & Astrophysics
Context. The Parker transport equation (TPE) has been the preferred equation for the past 60 years in studies of galactic cosmic ray (GCR) modulation. The focused TPE, however, describes the same processes on a more fundamental level than the Parker TPE ...
van den Berg J. P., Engelbrecht N. E., Strauss R. D.   +2 more
doaj   +1 more source

GCR Environmental Models I: Sensitivity Analysis for GCR Environments

, 2014
Accurate galactic cosmic ray (GCR) models are required to assess crew exposure during long-duration missions to the Moon or Mars. Many of these models have been developed and compared to available measurements, with uncertainty estimates usually stated ...
Slaba, Tony C., Blattnig, Steve R.
core  

The rigidity-dependent delay time of the galactic cosmic ray modulation with respect to the open solar magnetic flux

Context. Studying the transport of galactic cosmic rays (GCRs) is crucial for understanding the space radiation environment and large-scale heliospheric structures.
Claudio Corti, Jingnan Guo, Weihao Liu, Yubao Wang, Yuming Wang, Robert Wimmer-Schweingruber   +5 more
core   +1 more source

Network analysis identifies a putative role for the PPAR and type 1 interferon pathways in glucocorticoid actions in asthmatics

BMC Medical Genomics, 2012
Background Asthma is a chronic inflammatory airway disease influenced by genetic and environmental factors that affects ~300 million people worldwide, leading to ~250,000 deaths annually.
Diez Diego, Goto Susumu, Fahy John V, Erle David J, Woodruff Prescott G, Wheelock Åsa M, Wheelock Craig E   +6 more
doaj   +1 more source

Toward Explaining Galactic Cosmic-Ray Modulation in a Dynamic Heliosheath: Transient Structures Seem Dominant and Magnetic Drifts Appear Reduced

The Astrophysical Journal
While traveling through the heliosheath (HS), Voyager 2 observed sustained flux depletions of galactic cosmic rays (GCRs) on scales of months to years.
J. G. Alonso Guzmán, V. Florinski, L.-L. Zhao, A. C. Cummings, B. C. Heikkila, M. E. Hill, R. Nikoukar, M. Opher   +7 more
doaj   +1 more source