Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Keran O'Brien"'
Autor:
Mary Michael, Gregorio J. Molina-Cuberos, Franck Montmessin, Olivier Witasse, Grégoire Déprez, Keran O'Brien, Sachchida Nand Tripathi, Sandy Cardnell
Publikováno v:
Journal of Geophysical Research: Planets. 121:2335-2348
The ionization of the lower Martian atmosphere and the presence of charged species are fundamental in the understanding of atmospheric electricity phenomena, such as electric discharges, large scale electric currents and Schumann resonances. The pres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06cb94da681bfedab79d3a53f7674c65
https://doi.org/10.1002/2016je005077
https://doi.org/10.1002/2016je005077
Autor:
Keran O’Brien
Publikováno v:
Recent Progress in Space Technology (Formerly: Recent Patents on Space Technology). 4:79-88
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d75b9a0c5647b874d311a9743046512
https://doi.org/10.2174/2210687105666150311001827
https://doi.org/10.2174/2210687105666150311001827
Publikováno v:
Quaternary Geochronology. 26:29-43
We present a comprehensive, nuclear-physics-based cosmogenic nuclide production rate model combining radiation transport modeling with excitation functions for commonly measured nuclides. This model allows investigation of factors influencing nuclide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78c804b325c3bc0886696016f3d0af83
https://doi.org/10.1016/j.quageo.2014.09.004
https://doi.org/10.1016/j.quageo.2014.09.004
Publikováno v:
Quaternary Geochronology. 26:44-55
Characteristics of the spallogenic component of nuclide production are investigated through the use of a physics-based model. Calculated production rates for commonly used nuclides indicate differences in scaling up to 15% at very high altitude. Angu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0046efb63ab0d7567306f407529c39c
https://doi.org/10.1016/j.quageo.2014.09.005
https://doi.org/10.1016/j.quageo.2014.09.005
Autor:
Keran O’Brien
Publikováno v:
Journal of Astrophysics & Aerospace Technology.
The primary cause of the high-energy particle acceleration of cosmic rays and solar-particle events is first-order Fermi diffusive shock acceleration. The importance of the maximum rigidity is that it governs the effective depth in the atmosphere tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5cc727be6ecbfa627248ac94c559e71c
https://doi.org/10.4172/2329-6542.1000130
https://doi.org/10.4172/2329-6542.1000130
Autor:
Keran O'Brien
Publikováno v:
The Astrophysical Journal. 716:544-549
The local all-particle cosmic-ray spectrum calculated from an integral equation reproduces the high-energy behavior of the spectrum up to 1019 eV assuming first-order Fermi shock acceleration. The first-order approximation, valid at energies below ab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4939b2a7b5bbcf5fd80b3df53d1b0621
https://doi.org/10.1088/0004-637x/716/1/544
https://doi.org/10.1088/0004-637x/716/1/544
Publikováno v:
The Astrophysical Journal. 711:744-756
Pure ethane ices (C2H6) were irradiated at 10, 30, and 50 K under contamination-free, ultrahigh vacuum conditions with energetic electrons generated in the track of galactic cosmic-ray (GCR) particles to simulate the interaction of GCRs with ethane i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1c86befc8244a92c6685233e269f6a9
https://doi.org/10.1088/0004-637x/711/2/744
https://doi.org/10.1088/0004-637x/711/2/744
Publikováno v:
Radiation Protection Dosimetry. 136:267-273
A sophisticated flight code named FREE (acronym for Flight Route Effective Dose Estimation) was built for professional commercial usage. During its creation special precautions have been taken to take correctly into account all existing dependencies
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c10afb59a4aea73a5b46453297407250
https://doi.org/10.1093/rpd/ncp128
https://doi.org/10.1093/rpd/ncp128
Autor:
Keran O'Brien
Publikováno v:
Acta Astronautica. 60:541-546
The stationary, source-free, one-dimensional solution to the cosmic-ray heliospheric transport equation was solved using Runge–Kutta methods. These calculations have been applied to the treatment of Forbush decreases and the evolution of the solar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0db53a0ee9e44a72fda89e98ab60c8e0
https://doi.org/10.1016/j.actaastro.2006.09.030
https://doi.org/10.1016/j.actaastro.2006.09.030
Autor:
Keran O'Brien, Kenzo Fujimoto
Publikováno v:
Japanese Journal of Health Physics. 37:325-334
Dose rates due to cosmic rays at all municipalities in Japan are estimated using a computer code (PLOTINUS) developed by K. O'BRIEN. Latitude, longitude and altitude data for all municipalities are assumed to be represented by the location of the cit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30bfdca912e3b62be933c9616c75265d
https://doi.org/10.5453/jhps.37.325
https://doi.org/10.5453/jhps.37.325