Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Robert B. Sheldon"'
Autor:
Robert B. Sheldon
Publikováno v:
Theology and Science
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36ce41b2797c7e1cce37b74caf8352f7
https://doi.org/10.1142/9789813235045_0005
https://doi.org/10.1142/9789813235045_0005
Autor:
Robert B. Sheldon
Publikováno v:
SPIE Proceedings.
The wet-comet model (WCM) of the structure and composition of comets was developed in 2005 to replace the “dirty-snowball” model (DSM) of Fred Whipple, because the first comet flybys of P/Halley “armada” revealed a very different landscape. S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::deda460d4cee60dc04311092ac40c27e
https://doi.org/10.1117/12.2220075
https://doi.org/10.1117/12.2220075
Autor:
Robert B. Sheldon
Publikováno v:
SPIE Proceedings.
Primordial comets are comets made of Big Bang synthesized materials—water, ammonium, and carbon ices. These are the basic elements for life, so that these comets can be colonized by cyanobacteria that grow and bioengineer it for life dispersal. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3671a386f8fb64671e1638f9465bbe70
https://doi.org/10.1117/12.2187110
https://doi.org/10.1117/12.2187110
Autor:
Robert B. Sheldon, Malkah I. Sheldon
Publikováno v:
SPIE Proceedings.
In 1871, Lord Kelvin suggested that the fossil record could be an account of bacterial arrivals on comets. In 1903, Svante Arrhenius suggested that spores could be transported on stellar winds without comets. In 1984, Sir Fred Hoyle claimed to see th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b009b37a7b0c660c15163a1e1919dec
https://doi.org/10.1117/12.2187138
https://doi.org/10.1117/12.2187138
Autor:
Jiasheng Chen, Theodore A. Fritz, Robert B. Sheldon, Jolene S. Pickett, Christopher T. Russell
Publikováno v:
Advances in Space Research. 27:1417-1422
A new acceleration and possible trapping region of the magnetosphere has been discovered by the POLAR spacecraft through the observations of the cusp energetic particle (CEP) events. The events were detected in the dayside high-altitude cusp and were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::862d587a6dcf2a013914b08c07884247
https://doi.org/10.1016/s0273-1177(01)00032-1
https://doi.org/10.1016/s0273-1177(01)00032-1
Publikováno v:
Advances in Space Research. 25:1445-1457
New observations from the NASA GGS POLAR satellite of cusp energetic particle [CEP] events indicate that the mechanism(s) in the dayside cusp accelerate the solar wind plasma to 100s and 1000s of kiloelec-tronvolts energies. The mechanism seems to be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::184b8d914c7c6aa6d0929d04e2d86799
https://doi.org/10.1016/s0273-1177(99)00656-0
https://doi.org/10.1016/s0273-1177(99)00656-0
Publikováno v:
Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science. 24:83-87
Interplanetary magnetic clouds appear to have a wide range of ability to affect the magnetospheric energetic particle populations. This “effectiveness” or lack thereof, shows up in both the electron and ion components of the radiation belts. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d9f5fe51aafd7d4032b0f502dd9ad23
https://doi.org/10.1016/s1464-1917(98)00012-9
https://doi.org/10.1016/s1464-1917(98)00012-9
Autor:
Harlan E. Spence, Christopher T. Russell, Theodore A. Fritz, Stefano Livi, Robert B. Sheldon, Joseph F. Fennell, Jiasheng Chen, Jolene S. Pickett
Publikováno v:
Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science. 24:135-140
The Charge and Mass Magnetospheric Ion Coimposition Experiment (CAMMICE) on the board the POLAR spacecraft observed more than 70 cusp energetic particle (CEP) eventin 1996. All of these events were associated with a decrease in the magnitude of the l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffe7aef83c8cb3b667a9313fac8a8b78
https://doi.org/10.1016/s1464-1917(98)00020-8
https://doi.org/10.1016/s1464-1917(98)00020-8
Publikováno v:
Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science. 24:233-238
A study of geomagnetically confined helium ions in the range 0.52–8.2 MeV ion kinetic energy was made with the CAMMICE Heavy Ion Telescope (HIT) during April–October 1996. Much of the year 1996 was remarkably geomagnetically quiescent with absenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7df14ccebfb0dd73e17e7b3b4bf8df7a
https://doi.org/10.1016/s1464-1917(98)00034-8
https://doi.org/10.1016/s1464-1917(98)00034-8
Publikováno v:
Geophysical Research Letters. 25:1825-1828
We report on the POLAR/ CEPPAD discovery of a trapped, 60°
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7d5d7f4a980a7e533b8c1790055fb71
https://doi.org/10.1029/98gl01399
https://doi.org/10.1029/98gl01399