Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Ryan A. Stephan"'
Autor:
Carolyn R. Mercer, Ryan A. Stephan, Mary A. Voytek, Curt Niebur, Lucas Paganini, Mitchell D. Schulte, Quang-Viet Nguyen, K. Michael Dalal, Hari D. Nayar
Publikováno v:
Earth and Space 2022.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a317dbd6b50bdaaccfe2a002ba4a65f
https://doi.org/10.1061/9780784484470.029
https://doi.org/10.1061/9780784484470.029
Publikováno v:
Mining, Metallurgy & Exploration. 37:1899-1910
During the past 15 years, roof fall rates have fallen dramatically in US coal mines, particularly in regions where the roof is weakest. The remarkable reduction in the number of roof falls has been accomplished with more effective roof support system
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bbbace517ec7b930d0a52e6f393a221
https://doi.org/10.1007/s42461-020-00301-x
https://doi.org/10.1007/s42461-020-00301-x
Publikováno v:
SAE International Journal of Aerospace. 1:532-536
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44d3212b52196a3d1820c278f14d7b93
https://doi.org/10.4271/2008-01-2169
https://doi.org/10.4271/2008-01-2169
Autor:
Ryan A. Stephan, John Cornwell, Rubik Sheth, David Lawrence, Brian J. Zay, Prasanna Chandrasekhar, Edmonia Caldwell
Publikováno v:
Journal of Applied Polymer Science. 131
Variable emittance (e) is a property vital for the increasing needs in thermal control of future microspacecraft. This article describes fabrication, function, and performance of thin-film, flexible, variable-emittance (V-E) electrochromic skins that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96fc2f6d825a673a183b9fb06a598e98
https://doi.org/10.1002/app.40850
https://doi.org/10.1002/app.40850
Autor:
Ryan A. Stephan, Thomas O. Leimkuehler
Publikováno v:
42nd International Conference on Environmental Systems.
Phase change materials (PCM) may be useful for spacecraft thermal control systems that involve cyclical heat loads or cyclical thermal environments. Thermal energy can be stored in the PCM during peak heat loads or in adverse thermal environments. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df192861d78a072b01b622a87273aa0d
https://doi.org/10.2514/6.2012-3520
https://doi.org/10.2514/6.2012-3520
Publikováno v:
42nd International Conference on Environmental Systems.
Sublimators have been used as heat rejection devices for a variety of space applications including the Apollo Lunar Module and the Extravehicular Mobility Unit (EMU). Sublimators typically operate with steady-state feedwater utilization at or near 10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8add132afe4a2e927c355552dd3bbc05
https://doi.org/10.2514/6.2012-3540
https://doi.org/10.2514/6.2012-3540
Autor:
Balasubramaniam Ramaswamy, Thomas Cognata, Thomas O. Leimkuehler, Mohammad M. Hasan, Ryan A. Stephan, Vedha Nayagam
Publikováno v:
41st International Conference on Environmental Systems.
Water affords manifold benefits for human space exploration. Its properties make it useful for the storage of thermal energy as a Phase Change Material (PCM) in thermal control systems, in radiation shielding against Solar Particle Events (SPE) for t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b42aac26e9ec32bf0b6c831d4902b0f
https://doi.org/10.2514/6.2011-5208
https://doi.org/10.2514/6.2011-5208
Autor:
Ryan A. Stephan, Eric Sunada, Gani B. Ganapathi, Gajanana C. Birur, Jennifer Miller, Mark Johnson, Daniel F. Berisford
Publikováno v:
41st International Conference on Environmental Systems.
The digital radiator technology is one of three variable heat rejection technologies being investigated for future human-rated NASA missions. The digital radiator concept is based on a mechanically pumped fluid loop with parallel tubes carrying coola
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b20efdbb47081e94fe208e1818c4b8e0
https://doi.org/10.2514/6.2011-5003
https://doi.org/10.2514/6.2011-5003
Publikováno v:
41st International Conference on Environmental Systems.
Phase change materials (PCM) may be useful for thermal control systems that involve cyclical heat loads or cyclical thermal environments such as Low Earth Orbit (LEO) and Low Lunar Orbit (LLO). Thermal energy can be stored in the PCM during peak heat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6efa0c4fb002b84bbf956ffc216392e
https://doi.org/10.2514/6.2011-5207
https://doi.org/10.2514/6.2011-5207
Autor:
Ryan A. Stephan
Publikováno v:
41st International Conference on Environmental Systems.
NASA's Constellation Program (CxP) was developed to successfully return humans to the Lunar surface prior to 2020. The CxP included several different project offices including Altair, which was planned to be the next generation Lunar Lander. The Alta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::350345d75419dc89ca1511a4a3a9d622
https://doi.org/10.2514/6.2011-5001
https://doi.org/10.2514/6.2011-5001