Results 91 to 100 of about 633,557 (183)

Anomalous cosmic rays within the inner heliosphere: Observations of helium by the High Energy Telescope on board Solar Orbiter

Astronomy & Astrophysics
Context. The radial gradients of cosmic rays are key parameters in studies of the transport of particles in space. Solar Orbiter, launched on 2020 February 10, approaches the Sun approximately every half-a-year, with its closest perihelion distance of 0 ...
Xu Zigong, Wimmer-Schweingruber Robert F., Berger Lars, Kühl Patrick, Kollhoff Alexander, Heber Bernd, Böttcher Stephan I., Yang Liu, Heidrich-Meisner Verena, Strauss Roelf Du Toit, Gomez-Herrero Raúl, Rodriguez-Pacheco Javier, Pacheco Daniel, Leske Richard A.   +13 more
doaj   +1 more source

Galactic and solar energetic particle observations during the increasing part of solar cycle 25 with EPD/HET and Metis on board Solar Orbiter

Astronomy & Astrophysics
Context. Galactic cosmic rays (GCRs) and solar energetic particles (SEPs) with energies greater than tens of megaelectron volts are at the origin of spacecraft deep charging.
Grimani C., Fabi M., Persici A., Sabbatini F., Villani M., Burtovoi A., Frassati F., Pancrazzi M., Telloni D., Kühl P., Rodríguez-Pacheco J., Wimmer-Schweingruber R. F., Abbo L., Andretta V., Antonucci E., Chioetto P., Da Deppo V., De Leo Y., Gissot S., Jerse G., Landini F., Messerotti M., Naletto G., Nicolini G., Plainaki C., Romoli M., Russano G., Sasso C., Spadaro D., Stangalini M., Susino R., Teriaca L., Uslenghi M.   +32 more
doaj   +1 more source

On the Comprehensive 3D Modeling of the Radiation Environment of Proxima Centauri b: A New Constraint on Habitability?

The Astrophysical Journal
The combined influence of stellar energetic particles and galactic cosmic rays (GCRs) on the radiation environment, and hence potential habitability, of Earth-like exoplanets is relatively unknown.
N. Eugene Engelbrecht, Konstantin Herbst, R. Du Toit Strauss, Klaus Scherer, Juandre Light, K. D. Moloto   +5 more
doaj   +1 more source

About the Possible Solar Nature of the ~200 yr (de Vries/Suess) and ~2000–2500 yr (Hallstadt) Cycles and Their Influences on the Earth’s Climate: The Role of Solar-Triggered Tectonic Processes in General “Sun–Climate” Relationship

Atmosphere
(1) Introduction: The subject of the present study concerns the analysis of the existence and long time evolution of the solar ~200 yr (de Vries/Suess) and ~2400 yr (Hallstadt) cycles during the recent part of the Wurm ice epoch and the Holocene, as well
Boris Komitov
doaj   +1 more source

Simulation-based estimation of dosimetric quantities for different phantom compositions and the effectiveness of aluminum shielding against galactic cosmic rays

Radiation Protection and Environment
Astronauts on space missions are exposed to high radiation levels, especially from galactic cosmic rays (GCRs), which consist of particles with high energy such as protons, helium ions, and heavy ions.
Rohit Yadav, Sandipan Dawn, A. K. Bakshi, B. K. Sapra   +3 more
doaj   +1 more source

Modulation of K-waves and cycles of global GDP per capita (1961–2024) by GCR extremes (1959–2022): R2=0.94 and R2=0.92

Abstract. The classical theory of innovation clusters (J. Schumpeter) and the concept of new technological paradigms (S. Yu. Glazyev), which dominate modern macroeconomics, view the emergence of basic innovations as the root cause of long waves (K-waves).
openaire   +1 more source

CHARACTERIZATION OF GCR-LIGHTLIKE WARPED PRODUCT OF INDEFINITE COSYMPLECTIC MANIFOLDS

, 2015
. In this paper we prove that there do not exist warped product GCR-lightlike submanifolds in the form M = N? NT such that N? is an anti-invariant submanifold tangent to V and NT an in-variant submanifold of M, other than GCR-lightlike product in an in-
Rakesh Kumar, R. K. Nagaich
core  

Modulation of K-waves and cycles of global GDP per capita (1961–2024) by maxima (R2=0.92) and minima (R2=0.94) of GCR intensity (1959–2022)

Abstract. The classical theory of innovation clusters (J. Schumpeter) and the concept of new technological paradigms (S. Yu. Glazyev), which dominate modern macroeconomics, view the emergence of basic innovations as the root cause of long waves (K-waves).
openaire   +1 more source

Optimum Mode-Switching-Assisted Constant-Power Single- and Multicarrier Adaptive Modulation

, 2003
A set of optimum mode-switching levels is derived for a generic constant-power adaptive-modulation scheme based on a closed-form expression of the average bit error ratio (BER) and the average bits-per-symbol (BPS) throughput of the adaptive-modulation ...
Choi, B.J., Hanzo, L.
core   +1 more source

The Source of the 2017 Cosmic-ray Half-year Modulation Event

The Astrophysical Journal
In 2017, as the solar cycle approached solar minimum, an unusually long and large depression was observed in galactic cosmic-ray (GCR) protons, detected with the Alpha Magnetic Spectrometer, lasting for the second half of that year.
O. P. M. Aslam, D. MacTaggart, R. Battiston, M. S. Potgieter, M. D. Ngobeni   +4 more
doaj   +1 more source