Results 51 to 60 of about 633,557 (183)

Orbital Control of Reticulofenestra (Calcareous Nannofossils) Assemblages During the Early Pliocene

Paleoceanography and Paleoclimatology, Volume 41, Issue 9, September 2026.
Abstract Orbital changes have shaped Earth's climate system and influenced the evolution and spatial distribution of marine plankton, including coccolithophores. Some studies have assessed eccentricity's impact on the diversity and morphological evolution of Noelaerhabdaceae taxa during the Quaternary.
Laura Martín‐García, Francisco J. Jiménez‐Espejo, Diana Ochoa, Emília Salgueiro, Montserrat Alonso‐García, Timothy Herbert, Fatima Abrantes, David Hodell, José‐Abel Flores   +8 more
wiley   +1 more source

Model calculation of charged galactic cosmic ray radiation dose during a flight to Mars

Frontiers in Physics
The radiation exposure from galactic cosmic rays (GCRs) presents a significant challenge for human spaceflight to Mars. In this study, we employ our previously published GCR radiation dose calculation model to estimate the GCR radiation dose rates during
Dan Lyu, Gang Qin, Gang Qin
doaj   +1 more source

Properties of the long term heliospheric modulation - tests to be met by modulation theory

, 2003
The long term heliospheric modulation of the GCR, 850-1980 AD, exhibits features that are proposed as tests of the contemporary theories of cosmic ray modulation, and the evolution of the interplanetary magnetic field.
Beer, J. (author), McDonald, F.B. (author), McCracken, K.G. (author)   +2 more
core   +1 more source

The 40K‐K dating system: 1. Improving data interpretation using new model calculations

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2187-2200, September 2026.
Abstract The 40K‐K cosmic‐ray exposure (CRE) dating system offers a promising method for determining exposure ages of iron meteorites by combining the radioactive cosmogenic 40K with the stable cosmogenic isotopes 39K and 41K. However, earlier applications relied on semi‐empirical production models and inconsistent analytical data sets, limiting their ...
Farshid Nozarian, Suzette Timmerman, Ingo Leya   +2 more
wiley   +1 more source

Near-Capacity Irregular Bit-Interleaved Coded Modulation [PDF]

, 2008
An Irregular Bit-Interleaved Coded Modulation based Iterative Decoding (Ir-BICM-ID) aided scheme is proposed. The irregularity of the scheme pervades the three basic components of BICM-ID, namely the encoder, the unity-rate precoder and the bit-to-symbol
Tee, R. Y., J. Wang, R. Y. S. Tee, R. G. Maunder, L. Hanzo, Wang, J., Hanzo, L., Maunder, R. G.   +7 more
core   +1 more source

Low‐dose X‐ray radiation induces an adaptive response: A potential countermeasure to galactic cosmic radiation exposure

Experimental Physiology, Volume 111, Issue 9, Page 3919-3927, 1 September 2026.
Abstract Space exploration involves many dangers including galactic cosmic radiation (GCR). This class of radiation includes high‐energy protons and heavy ionizing ions. NASA has defined GCR as a carcinogenic risk for long‐duration space missions. To date, no clear strategy has been developed to counter chronic GCR exposure.
Siena Edwards, Jessica Adams, Anastasia Tchernikov, John G. Edwards   +3 more
wiley   +1 more source

Elemental GCR Observations during the 2009-2010 Solar Minimum Period [PDF]

, 2013
Using observations from the Cosmic Ray Isotope Spectrometer (CRIS) onboard the Advanced Composition Explorer (ACE), we present new measurements of the galactic cosmic ray (GCR) elemental composition and energy spectra for the species B through Ni in the ...
Davis, A. J., Binns, W. R., vonRosenvinge, T. T., deNolfo, G. A., Leske, R. A., Israel, M. H., Stone, E. C., Mewaldt, R. A., Christian, E. R., Lave, K. A., Wiedenbeck, M. E., Cummings, A. C.   +11 more
core  

Matroshka DOSTEL measurements onboard the International Space Station (ISS)

Journal of Space Weather and Space Climate, 2015
This paper presents the absorbed dose and dose equivalent rate measurements achieved with the DOSimetry TElescope (DOSTEL) during the two Matroshka (MTR) experiment campaigns in 2004/2005 (MTR-1) and 2007/2008 (MTR-2B). The comparison between the inside (
Labrenz Johannes, Burmeister Soenke, Berger Thomas, Heber Bernd, Reitz Guenther   +4 more
doaj   +1 more source

Optimum Mode-Switching Assisted Adaptive Modulation

, 2001
Adaptive modulation techniques combat fading by employing a suitable modulation mode depending on the instantaneous channel conditions for improving the Bit Error Rate (BER) performance or the average through-put.
Choi, B.J., Hanzo, L.
core   +1 more source

Long‐Term Observations of Galactic Cosmic Ray LET Spectra in Lunar Orbit by LRO/CRaTER

Space Weather, 2020
The Cosmic Ray Telescope for the Effects of Radiation (CRaTER) has been orbiting the Moon since 2009 aboard the Lunar Reconnaissance Orbiter (LRO). From this vantage point, it samples the interplanetary energetic particle population outside the shielding
M. D. Looper, J. E. Mazur, J. B. Blake, H. E. Spence, N. A. Schwadron, J. K. Wilson, A. P. Jordan, C. Zeitlin, A. W. Case, J. C. Kasper, L. W. Townsend, T. J. Stubbs   +11 more
doaj   +1 more source