live interactive learning @ your desktop wednesday, may 13, 2009 nsdl/nsta web seminar aps: studying...
TRANSCRIPT
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LIVE INTERACTIVE LEARNING @ YOUR DESKTOP
Wednesday, May 13, 2009
NSDL/NSTA Web SeminarAPS: Studying the Human Physiological Limits
of Exploring Mars
Resource list for tonight’s presentation:http://www.diigo.com/list/nsdlworkshops/web-sem-mars
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Today’s NSDL Expert
http://nsdl.org
Jim Pawelczyk, Ph.D. Associate Professor of Physiology & Kinesiology, College of Health and Human Development, Pennsylvania State University
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http://nsdl.org
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http://nsdl.org
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http://nsdl.org
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International Space Station
http://spaceflight.nasa.gov/realdata/sightings/
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http://nsdl.org
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Type your responses in the chat
http://nsdl.org
What research is necessary for humans to travel to Mars?
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http://nsdl.org
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http://nsdl.org
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http://nsdl.org
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4-6 crew to low earth orbitCrew Exploration Vehicle: LEO EnvironmentEarth entry, water (or land) recovery
4-6 crew to lunar surfaceLunar Lander: Lunar surface operations 14-30 days
Crew to Mars orbitTransit vehicle: Earth-Mars cruise – 6-9 monthsMars vicinity operations – 30-90 daysMars-Earth cruise – 9-12 months
4-6 crew to lunar surface for long-duration stayLunar Habitat: Lunar surface operations 60-90 days
Crew to Mars surfaceSurface Habitat
2030+
2020
2025+2014
2015-2020
The Exploration VisionThe Exploration Vision
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Mars flight profile - 2014
161 day Transit Out, 154 day Return
Mars @ ArrivalJune 30, 2014
Earth @DepartureJan. 20, 2014
Outbound
Trajectory
Return Inbound Trajectory
Earth @ ArrivalJune 26, 2016
Mars @ DepartureJan. 24, 2016
Mars Perihelion: January 22, 2013 December 10, 2014
Mars Surface Stay Time 569 days
Earth OrbitMars OrbitPiloted TrajectoriesStay on Mars Surface
http://nsdl.org
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Summary of human long-duration spaceflight
As of 12-Oct-2008
http://nsdl.org
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Let’s pause for questions from the audience….
http://nsdl.org
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Which factor(s) pose the greatest human challenge to Mars exploration? Stamp your answer(s)
Environmental Muscle Cardiovascular Neurological
Psychological Ambulation Radiation Hydration & Nutrition
Immunological Bone Life Support Medical
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The Martian environment
http://nsdl.org
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Potential for near surface water on Mars
Image courtesy of MalinSpace Systems / NASA
http://nsdl.org
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Sabatier Reaction
http://nsdl.org
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Dust devils on Mars
Image courtesy of MalinSpace Systems / NASA
http://nsdl.org
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Dust devils on Mars
Image courtesy of MalinSpace Systems / NASA
http://nsdl.org
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Dust devils on Mars
Image courtesy of Jet Propulsion Laboratory / NASA and Eric Hartwell
http://nsdl.org
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Let’s pause for questions from the audience….
http://nsdl.org
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During spaceflight, osteopenia …
A. Doesn’t occur
B. Occurs slower than in the elderly
C. Occurs at a rate similar to the elderly
D. Occurs more quickly than in the elderly
Poll Question:
http://nsdl.org
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Osteoporosis / Osteopenia
http://nsdl.org
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Skylab – A repository of physiological data
http://nsdl.org
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Spaceflight accelerates bone loss
Smith et al., J. Clin. Endocrinol. Metab. 83:3584-3591, 1998.
http://nsdl.org
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Bone mineral losses from spaceflight
+0.6 % / mo+0.6 % / mo
+0.1 % / mo+0.1 % / mo
-1.1 % / mo-1.1 % / mo-1.4 % / mo-1.4 % / mo
-1.2 % / mo-1.2 % / mo
-1.6 % / mo-1.6 % / mo
-1.3 % / mo-1.3 % / mo
-1.5 % / mo-1.5 % / mo
LeBlanc et al., Bone 11:S323, 1996
Lang et al., J Bone Mineral Res 19:1006-1012, 2004
http://nsdl.org
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Chronic bone mineral loss is debilitating
Moynahan et al., J. Spinal Cord Med. 19:249, 1996
LeBlanc et al., J. Bone Mineral Res. 11:S323, 1996
http://nsdl.org
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During spaceflight, osteopenia …A. Doesn’t occur
B. Occurs slower than in the elderly
C. Occurs at a rate similar to the elderly
D. Occurs more quickly than in the elderly
Poll Question:
http://nsdl.org
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Fracture risk
Hui et al. J. Clin. Invest. 81:1804, 1988.?
http://nsdl.org
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The occupational risks of spaceflight
• 100% would have >15% bone mineral loss
• ~80% would have >25% bone mineral loss
• >40% would lose >50% of their bone mineral
• ~20% would have >25% loss in exercise capacity
• ~40% would have >30% loss in muscle strength
If astronauts went to Mars today …
http://nsdl.org
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Information and technology critical for human Mars missions
• Site selection for human missions• Extend stay time• Demonstrations of critical technologies to
“live off the land”• Protection from physical/environmental
hazards • Understand and minimize physiological
hazards to human explorers
http://nsdl.org
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Earth is the cradle of humanity, but one cannot remain in the cradle forever.
Konstantin Eduardovich Tsiolkovsky
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Let’s pause for questions from the audience….
http://nsdl.org
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http://nsdl.org
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http://nsdl.org
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http://nsdl.org
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http://nsdl.org
THANK YOU!
Resource list for tonight’s presentation:http://www.diigo.com/list/nsdlworkshops/web-sem-mars
Jim Pawelczyk, [email protected]
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Learn about new tools and resources, discuss issues related to science education, find out about ways to enhance your teaching at: http://expertvoices.nsdl.org/learningdigitalK12
Resources from this seminar:http://www.diigo.com/list/nsdlworkshops/web-sem-mars
Search for “diigo nsdl workshops mars”
http://nsdl.org
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http://www.elluminate.com
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http://learningcenter.nsta.org
NLC screenshot
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National Science Teachers AssociationDr. Francis Q. Eberle, Executive Director
Zipporah Miller, Associate Executive Director Conferences and Programs
Al Byers, Assistant Executive Director e-Learning
LIVE INTERACTIVE LEARNING @ YOUR DESKTOP
NSTA Web SeminarsPaul Tingler, Director
Jeff Layman, Technical Coordinator