Search Results - "Gernhardt, Michael L"

Evaluation of dual multi-mission space exploration vehicle operations during simulated planetary surface exploration by Abercromby, Andrew F.J., Gernhardt, Michael L., Jadwick, Jennifer

“…A pair of small pressurized rovers (multi-mission space exploration vehicles, or MMSEVs) is at the center of the Global Point-of-Departure architecture for…”
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Desert RATS 2011: Human and robotic exploration of near-Earth asteroids by Abercromby, Andrew F.J., Chappell, Steven P., Gernhardt, Michael L.

“…The Desert Research and Technology Studies (D-RATS) 2011 field test involved the planning and execution of a series of exploration scenarios under operational…”
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NEEMO 15: Evaluation of human exploration systems for near-Earth asteroids by Chappell, Steven P., Abercromby, Andrew F., Gernhardt, Michael L.

“…The NASA Extreme Environment Mission Operations (NEEMO) 15 mission was focused on evaluating techniques for exploring near-Earth asteroids (NEAs). It began…”
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The preferred walk to run transition speed in actual lunar gravity by De Witt, John K, Edwards, W Brent, Scott-Pandorf, Melissa M, Norcross, Jason R, Gernhardt, Michael L

“…Quantifying the preferred transition speed (PTS) from walking to running has provided insight into the underlying mechanics of locomotion. The dynamic…”
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Modeling a 15-min extravehicular activity prebreathe protocol using NASA's exploration atmosphere (56.5kPa/34% O2) by Abercromby, Andrew FJ, Conkin, Johnny, Gernhardt, Michael L

“…NASA's plans for future human exploration missions utilize a new atmosphere of 56.5kPa (8.2psia), 34% O2, 66% N2 to enable rapid extravehicular activity (EVA)…”
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Venous Gas Emboli and Ambulation at 4.3 psia by Conkin, Johnny, Pollock, Neal W, Natoli, Michael J, Martina, Stefanie D, Wessel, 3rd, James H, Gernhardt, Michael L

“…Ambulation during extravehicular activity on Mars may increase the risk of decompression sickness through enhanced bubble formation in the lower body. walking…”
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Hypobaric Decompression Sickness Treatment Model by Conkin, Johnny, Abercromby, Andrew F J, Dervay, Joseph P, Feiveson, Alan H, Gernhardt, Michael L, Norcross, Jason R, Ploutz-Snyder, Robert, Wessel, 3rd, James H

“…The Hypobaric Decompression Sickness (DCS) Treatment Model links a decrease in computed bubble volume from increased pressure (ΔP), increased oxygen (O2)…”
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Hemoglobin Oxygen Saturation with Mild Hypoxia and Microgravity by Conkin, Johnny, Wessel, 3rd, James H, Norcross, Jason R, Bekdash, Omar S, Abercromby, Andrew F J, Koslovsky, Matthew D, Gernhardt, Michael L

“…Microgravity (μG) exposure and even early recovery from μG in combination with mild hypoxia may increase the alveolar-arterial oxygen (O2) partial pressure…”
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NEEMO 18-20: Analog testing for mitigation of communication latency during human space exploration by Chappell, Steven P., Graff, Trevor G., Beaton, Kara H., Abercromby, Andrew F. J., Halcon, Christopher, Miller, Matthew J., Gernhardt, Michael L.

“…NASA Extreme Environment Mission Operations (NEEMO) is an underwater spaceflight analog that allows a true mission-like operational environment and uses…”
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Human exploration missions to phobos prior to crewed mars surface missions by Gernhardt, Michael L., Abercromby, Andrew F. J., Bekdash, Omar S., Chappell, Steven P., Zu Qun Li, Beaton, Kara H., Crues, Edwin Z., Bielski, Paul

“…Phobos is a scientifically interesting destination which offers engineering, operational and public outreach activities that could enhance subsequent Mars…”
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Risk assessment of physiological effects of atmospheric composition and pressure in Constellation vehicles by Scheuring, Richard, Conkin, Johnny, Jones, Jeffrey A., Gernhardt, Michael L.

“…Introduction: To limit the risk of fire and reduce denitrogenation time to prevent decompression sickness to support frequent extravehicular activities on the…”
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Comparison of metabolic gas analysis between a standard laboratory system and a portable device by Stroud, Leah C, Feiveson, Alan H, Ploutz-Snyder, Robert, De Witt, John K, Everett, Meghan E, Gernhardt, Michael L

“…Dear Editor-in-chief The recent development of portable metabolic gas analysis systems gives scientists the capability of measuring physiological data,…”
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Modeling a 15-min extravehicular activity prebreathe protocol using NASA׳s exploration atmosphere (56.5kPa/34% O2) by Abercromby, Andrew F.J., Conkin, Johnny, Gernhardt, Michael L.

“…NASA׳s plans for future human exploration missions utilize a new atmosphere of 56.5kPa (8.2psia), 34% O2, 66% N2 to enable rapid extravehicular activity (EVA)…”
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Probability of hypobaric decompression sickness including extreme exposures by Conkin, Johnny, Gernhardt, Michael L, Abercromby, Andrew F, Feiveson, Alan H

“…The fitting of probabilistic decompression sickness (DCS) models is more effective when data encompass a wide range of DCS incidence. We obtained such data…”
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Oxygen consumption at altitude as a risk factor for altitude decompression sickness by Webb, James T, Krock, Larry P, Gernhardt, Michael L

“…The existence of a general influence of exercise on the incidence of decompression sickness (DCS) has been known for more than a half-century. However,…”
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Protective mechanisms in hypobaric decompression by Foster, Philip P, Pollock, Neal W, Conkin, Johnny, Dervay, Joseph P, Caillot, Nicolas, Chhikara, Raj S, Vann, Richard D, Butler, Bruce D, Gernhardt, Michael L

“…To reduce bubble formation and growth during hypobaric exposures, a denitrogenation or nitrogen "washout" procedure is performed. This procedure consists of…”
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Development of a ground test & analysis protocol for NASA's NextSTEP phase 2 habitation concepts by Gernhardt, Michael L., Beaton, Kara H., Chappell, Steven P., Bekdash, Omar S., Abercromby, Andrew F. J.

“…The NASA Next Space Technologies for Exploration Partnerships (NextSTEP) program is a public-private partnership model that seeks commercial development of…”
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Effect of Changing Weight and Mass on Human Performance in a Lunar Prototype Spacesuit: 2116 Board #245 June 3 8:00 AM - 9:30 AM by Norcross, Jason R., Chappell, Steven P., Gernhardt, Michael L.

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Mars ascent vehicle sizing, habitability, and commonality in NASA's Evolvable Mars Campaign by Gernhardt, Michael L., Bekdash, Omar S., Litaker, Harry L., Chappell, Steven P., Beaton, Kara H., Newton, Carolyn, Crues, Edwin Z., Abercromby, Andrew F. J.

“…The Mars Ascent Vehicle (MAV) is the largest indivisible payload and has the largest "gear ratio" in NASA's Evolvable Mars Campaign (EMC) architecture. For…”
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Low-latency teleoperations and telepresence for the evolvable Mars campaign by Lupisella, Mark L., Wright, Michael R., Bleacher, Jacob E., Young, Kelsey, Gernhardt, Michael L., Chappell, Steven P., Beaton, Kara H.

“…This paper describes low-latency teleoperations (LLT) analyses performed by the NASA Human Spaceflight Architecture Team (HAT), as part of the Evolvable Mars…”
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