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Sample records for mars rover curiosity

  1. Mars Curiosity rover talks in May

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  2. Curiosity rover zaps Mars for life signs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    trio is an essential component of the heat-producing Multi-Mission Radioisotope Thermoelectric Generator unit. It powers the rover and keeps the instruments from freezing solid...

  3. Curiosity Rover Mars Science Laboratory (MSL)

    E-Print Network [OSTI]

    --Curiosity Landing Site Gale Crater is a fascinating place to explore because of the mountain of layered materials the clay-bearing layers are layers with minerals contain- ing sulfur and oxygen. These different layers of a layered mountain inside Gale Crater. For more information about Gale Crater and why NASA has selected

  4. Laser-Firing ChemCam Vital to Curiosity Rover's Tour of Mars...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    NASA's Curiosity rover. Image: NASAJPL-CaltechLANLCNESIRAP 4 of 4 A bright ball of plasma, produced by ChemCam's invisible laser beam striking a rock within the Mars sample...

  5. Curiosity rover finds evidence of Mars' primitive continental crust

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  6. Curiosity rover finds evidence of Mars' primitive continental...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1-2 miles down into the crust. Access to some of these rocks, strewn along the rover's path, provided critical information that could not be observed by other means, such as by...

  7. Curiosity Rover confirms existence of a large ancient lake on...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Deputy Laboratory Director Paul Henry, Laboratory Director Charles McMillan and Amy Wong. Curiosity Rover bears three LANL technologies Contact Los Alamos National Laboratory...

  8. Powering Curiosity: Lab Tech Goes to Mars | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    sets this rover apart from its predecessors -- Curiosity lacks solar panels. Instead, a Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) powers Curiosity. The device...

  9. Planning Considerations Related to the Organic Contamination of Martian Samples and Implications for the Mars 2020 Rover

    E-Print Network [OSTI]

    Sessions, A. L.

    Data gathered during recent NASA missions to Mars, particularly by the Rovers Spirit, Opportunity, and Curiosity, have provided important insights into the past history and habitability of the Red Planet. The Mars science ...

  10. Mars `Curiosity' has ORNL tech

    E-Print Network [OSTI]

    . The rover's mobile instrument platform is too large to rely on solar-powered batteries and uses a plutonium activities. The iridium alloy was tested in temperature ranges applicable to this system to insure adequate students to pursue careers in science, technology, engineering and mathematics. "The program was called

  11. The Mission of the Mars Exploration Rovers

    ScienceCinema (OSTI)

    Grant, John [Smithsonian Institution, Washington, D.C., United States

    2010-01-08

    The Mars Exploration Rover mission was expected to last 3 months, but has continued for more than 4 years. The major science results from both rovers will be summarized.

  12. Mars `Curiosity' has ORNL tech

    E-Print Network [OSTI]

    Pennycook, Steve

    thermoelectric generator, the Multi-Mission Radioisotope Thermoelectric Generator." ORNL's iridium alloy clad Radioisotope Thermoelectric Generator were produced at ORNL. (Image courtesy of NASA.) Table of Contents Mars involved with the development of this generator for several years." Key components of the probe's Multi-Mission

  13. Powering Mars Rovers

    ScienceCinema (OSTI)

    Stewert, Robin;

    2013-05-28

    INL scientists are doing their best to help solve our energy problems here on Earth. But did you know the lab is playing a key role in the exploration of other worlds, too? Meet INL Engineer Robin Stewart helps build and test generators that power NASA missions to Pluto and Mars. You can learn more about INL projects at http://www.facebook.com/idahonationallaboratory.

  14. Curiosity rover zaps Mars for life signs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  15. Water for future Mars astronauts?

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Water for future Mars astronauts? Water for future Mars astronauts? Within its first three months on Mars, NASA's Curiosity Rover saw a surprising diversity of soils and sediments...

  16. ChemCam for Mars Science Laboratory rover, undergoing pre-flight testing

    ScienceCinema (OSTI)

    None

    2014-08-12

    Los Alamos National Laboratory and partners developed a laser instrument, ChemCam, that will ride on the elevated mast of the Mars Science Laboratory rover Curiosity. The system allows Curiosity to "zap" rocks from a distance, reading their chemical composition through spectroscopic analysis. In this video, laboratory shaker-table testing of the instrument ensures that all of its components are solidly attached and resistant to damage from the rigors of launch, travel and landing.

  17. NASA agreements advance Mars exploration, Los Alamos Rover instrument...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NASA agreements advance Mars exploration NASA agreements advance Mars exploration, Los Alamos Rover instrument a key component Los Alamos National Laboratory is coordinating with...

  18. ChemCam rock laser for Mars Science Laboratory "Curiosity"

    ScienceCinema (OSTI)

    Wiens, Roger

    2014-08-12

    Los Alamos has a long history of space-related instruments, tied primarily to its role in defense-related treaty verification. Space-based detectors have helped determine the differences between signals from lightning bolts and potential nuclear explosions. LANL-developed gamma-ray detection instruments first revealed the existence of what we now know as gamma-ray bursts, an exciting area of astrophysical research. And the use of LANL instruments on varied space missions continues with such products as the ChemCam rock laser for NASA, shown here. The Engineering Model of the ChemCam Mars Science Laboratory rover instrument arrived at NASA's Jet Propulsion Laboratory on February 6, 2008. The Flight Model was shipped in August, 2010 for installation on the rover at JPL. ChemCam will use imaging and laser-induced breakdown spectroscopy (LIBS) to determine rock and soil compositions on Mars, up to 9 meters from the rover. The engineering model is being integrated into the rover test bed for the development and testing of the rover software. The actual flight model components were concurrently assembled at Los Alamos and in Toulouse, France. The Mars Science Laboratory is scheduled to launch in 2011. Animations courtesy of JPL/NASA.

  19. Mars Rover finds changing rocks, surprising scientists

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  20. AN AUTOMATED ROVER COMMAND GENERATION PROTOTYPE FOR THE MARS 2003 MARIE CURIE ROVER

    E-Print Network [OSTI]

    Schaffer, Steven

    1 AN AUTOMATED ROVER COMMAND GENERATION PROTOTYPE FOR THE MARS 2003 MARIE CURIE ROVER Rob Sherwood.lastname@jpl.nasa.gov Abstract This paper discusses a proof-of-concept prototype for ground-based automatic generation) based planning and scheduling system will automatically generate a command sequence that will execute

  1. SpiritMars Exploration Rovers National Aeronautics and

    E-Print Network [OSTI]

    Murdo" panorama, captured by the panoramic camera (Pancam) on NASA's Mars Exploration Rover Spirit. From April, exposed bright underlying material. This bright material is evidence of sulfur-rich salty minerals

  2. Celebrating the Curiosity Rover's Killer Mars Landing | GE Global Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  3. Curiosity Mars Rover's ChemCam | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

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  4. Planetary scientist to discuss Curiosity rover's visit to Mars

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  5. CuriosityMars Science Laboratory NASA's JOURNEY TO

    E-Print Network [OSTI]

    and Mineralogy Environmental Instruments REMS -- Rover Environmental Monitoring Station RAD -- Radiation Assessment Detector DAN -- Dynamic Albedo of Neutrons Rover Size Length --10 feet (3 meters), not including -- 2000 pounds (900 kilograms) Heating and Electrical Power Radioisotope Power System -- a Multi

  6. Mars Exploration Rover Mobility and Robotic Arm Operational Performance

    E-Print Network [OSTI]

    Mars Exploration Rover Mobility and Robotic Arm Operational Performance Edward Tunstel, Mark California Institute of Technology Pasadena, CA, 91109 USA tunstel@robotics.jpl.nasa.gov Abstract - Increased they should operate. The purpose of this paper is to describe an actual instance of a practical human-robot

  7. Mars Rover's ChemCam Instrument gets

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    last week to install the new software on Mars. "We think we will actually have better quality images and analyses with this new software than the original," said Wiens. The...

  8. Mars Rover's ChemCam Instrument gets sharper vision

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  9. Mars Rover's ChemCam Instrument gets

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  10. Rover Technology Development and Infusion for the 2009 Mars Science Laboratory Mission

    E-Print Network [OSTI]

    Volpe, Richard

    Rover Technology Development and Infusion for the 2009 Mars Science Laboratory Mission Richard Volpe and Stephen Peters Jet Propulsion Laboratory California Institute of Technology Pasadena, CA 91103 email: {firstname.lastname}@jpl.nasa.gov Keywords: Spacecraft Autonomy, Planetary Robotics, Technology

  11. ..but goals must balance curiosity : Research Fortnight : Mar 5 In the wake of the U-turn last week that gives UK astronomers continued access to the Gemini

    E-Print Network [OSTI]

    Crowther, Paul

    ..but goals must balance curiosity : Research Fortnight : Mar 5 In the wake of the U-turn last week to address government priorities. The UK needs to get the balance right between supporting curiosity-driven and goal-oriented research. The balance is clearly shifting to the latter. Before we topple, the scientific

  12. Onboard Autonomous Rock Shape Analysis For Mars Rovers

    E-Print Network [OSTI]

    in this process, we present an automated technique to allow a rover to classify the shape and other geologic were conducted by characterizing the two-dimensional rock shape while the three-dimensional shape developed and implemented. The per- formance of each measure was characterized by analyzing images from

  13. Curiosity Rover confirms existence of a large ancient lake on Mars

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  14. Laser-Firing ChemCam Vital to Curiosity Rover's Tour of Mars | Department

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  15. Strategies for autonomous rovers at Mars Martha S. Gilmore1

    E-Print Network [OSTI]

    Mjolsness, Eric

    , characterize the landing site and test geological hypothesis autonomously. Future missions to Mars will contain history, 3) the identification of resources and 4) the geological and geophysical history of the planet is the characterize the selected sites in detail using lander and mobile systems as is planned for the 2003

  16. Science Results from the Mars Exploration Rover Mission

    ScienceCinema (OSTI)

    Squyres, Steven [Cornell University, Ithaca, New York, United States

    2010-09-01

    One of the most important scientific goals of the mission was to find and identify a variety of rocks and soils that provide evidence of the past presence of water on the planet. To obtain this information, Squyres is studying the data obtained on Mars by several sophisticated scientific instruments.

  17. Mars Rover's ChemCam Instrument gets sharper vision

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  18. Nomad rover field experiment, Atacama desert, Chile 2. Identification of paleolife evidence using a robotic vehicle: Lessons and recommendations for a Mars sample return mission

    E-Print Network [OSTI]

    Cabrol, N. A.; Bettis III, E. A.; Glenister, B. F.; Chong, G.; Herrera, C.; Jensen, A.; Pereira, M.; Stoker, R.; Grin, E. A.; Landheim, R.; Thomas, G.; Golden, Jennifer E.; Saville, K.; Ludvigson, Gregory A.; Witzke, B.

    2001-04-25

    69-G81, 1970. Ramirez, C. F., and M. Gardeweg, Carta geo16gica de Chile, region de Antofagasta, scale 1:250,000, Serv. Nac. de Geol. y Mineria Chile, 1982. Squyres, S. W., et al., The Athena Mars Rover Science Payload, paper presented at Mars...

  19. Light-toned salty soils and coexisting Si-rich species discovered by the Mars Exploration Rover Spirit in Columbia Hills

    E-Print Network [OSTI]

    to Home Plate within the Inner Basin, light-toned soils were exposed, in spite of the factLight-toned salty soils and coexisting Si-rich species discovered by the Mars Exploration Rover; accepted 29 July 2008; published 19 December 2008. [1] Light-toned soils were exposed, through

  20. exploration, Los Alamos Rover

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NASA agreements advance Mars exploration, Los Alamos Rover instrument a key component June 17, 2015 SuperCam's body to be built at Los Alamos and the mast in France LOS ALAMOS,...

  1. A LANL Scientist's Dream Takes Off to Zap Rocks on Mars

    ScienceCinema (OSTI)

    Wiens, Roger

    2012-08-02

    Roger Wiens, with a team of 40 people at Los Alamos National Laboratory and the collaboration of the French space institute IRAP, created ChemCam, a laser spectrometer and telescope device aboard the Curiosity rover. ChemCam will blast rocks from as far as 7 meters, vaporize bits of their surfaces, and spectroscopically determine their chemical composition, aiding in the search for life on Mars, and making this scientist's boyhood dream a reality.

  2. BEAMS: Curiosity | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    BEAMS: Curiosity January 9, 2013 BEAMS, Becoming Excited About Math and Science, is one of our education programs. In particular, it is the only one in which I participate with...

  3. Los Alamos laser selected for 2020 Mars mission

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Los Alamos laser selected for 2020 Mars mission Los Alamos laser selected for 2020 Mars mission SuperCam builds upon the successful capabilities demonstrated aboard the Curiosity...

  4. Reconfigurable wheels : re-inventing the wheel for the next generation of planetary rovers

    E-Print Network [OSTI]

    Baker, Brittany, S.M. Massachusetts Institute of Technology

    2012-01-01

    Experiences with Spirit and Opportunity, the twin Mars Exploration Rovers, showed that one of the major issues that needs to be addressed in order to expand the exploration capabilities of planetary rovers is that of wheel ...

  5. NASA's Curiosity Rover Team Features Women Team Members | Department of

    Broader source: Energy.gov (indexed) [DOE]

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  6. Methods and tools for the formulation, evaluation and optimization of rover mission concepts

    E-Print Network [OSTI]

    Lamamy, Julien-Alexandre, 1978-

    2007-01-01

    Traditionally, Mars rover missions have been conceived with a single point design approach, exploring a limited architectural trade space. The design of future missions must resolve a conflict between increasingly ambitious ...

  7. Development of legged, wheeled, and hybrid rover mobility models to facilitate planetary surface exploration mission analysis

    E-Print Network [OSTI]

    McCloskey, Scott H. (Scott Haddon)

    2007-01-01

    This work discusses the Mars Surface Exploration (MSE) tool and its adaptation to model rovers featuring legged, wheeled, and hybrid mobility. MSE is a MATLAB based systems engineering tool that is capable of rapidly ...

  8. Diagenesis and clay mineral formation at Gale Crater, Mars

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bridges, J. C.; Schwenzer, S. P.; Leveille, R.; Westall, F.; Wiens, R. C.; Mangold, N.; Bristow, T.; Edwards, P.; Berger, G.

    2015-01-18

    The Mars Science Laboratory rover Curiosity found host rocks of basaltic composition and alteration assemblages containing clay minerals at Yellowknife Bay, Gale Crater. On the basis of the observed host rock and alteration minerals, we present results of equilibrium thermochemical modeling of the Sheepbed mudstones of Yellowknife Bay in order to constrain the formation conditions of its secondary mineral assemblage. Building on conclusions from sedimentary observations by the Mars Science Laboratory team, we assume diagenetic, in situ alteration. The modeling shows that the mineral assemblage formed by the reaction of a CO?-poor and oxidizing, dilute aqueous solution (Gale Portage Water)more »in an open system with the Fe-rich basaltic-composition sedimentary rocks at 10–50°C and water/rock ratio (mass of rock reacted with the starting fluid) of 100–1000, pH of ~7.5–12. Model alteration assemblages predominantly contain phyllosilicates (Fe-smectite, chlorite), the bulk composition of a mixture of which is close to that of saponite inferred from Chemistry and Mineralogy data and to that of saponite observed in the nakhlite Martian meteorites and terrestrial analogues. To match the observed clay mineral chemistry, inhomogeneous dissolution dominated by the amorphous phase and olivine is required. We therefore deduce a dissolving composition of approximately 70% amorphous material, with 20% olivine, and 10% whole rock component.« less

  9. Life Science & Technology Delft: Driven by curiosity,

    E-Print Network [OSTI]

    Langendoen, Koen

    Life Science & Technology Delft: Driven by curiosity, inspired by application. Diploma Master & Technology addresses the understanding of enzymes, living cells and biotechnological processes. Based' airplane fuels. The MSc programme in Life Science & Technology seeks to train the scientists and engineers

  10. Mars Rover : laser focusing and optimization

    E-Print Network [OSTI]

    Barkley, Walter Clifford

    2008-01-01

    fmax] = golden(f, ax, bx, cx, tol) %GOLDEN Minimize functionfmax] = golden(f, ax, bx, cx, tol) computes a local maximumTOL. The parameters ax, bx and cx must satisfy the following

  11. Mars mission safety

    SciTech Connect (OSTI)

    Buden, D. (EG G Idaho, Idaho Falls (USA))

    1989-06-01

    Precautions that need to be taken to assure safety on a manned Mars mission with nuclear thermal propulsion are briefly considered. What has been learned from the 1955 SNAP-10A operation of a nuclear reactor in space and from the Rover/NERVA project is reviewed. The ways that radiation hazards can be dealt with at various stages of a Mars mission are examined.

  12. Terramechanical analysis of rover wheel mobility over simulated Martian terrain at various slip conditions and vertical loads

    E-Print Network [OSTI]

    Puszko, Gregory D

    2013-01-01

    Unmanned Mars rovers are presented with the unique challenge of requiring autonomous driving control over rough, adverse territory. A software package, dubbed Artemis, was developed in order to model the expected forces ...

  13. Mars 'Curiosity' has ORNL tech | ornl.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and are present on the Pluto New Horizons mission to explore Pluto and the Kuiper Belt. "ORNL has been involved with the development of this generator for several years,"...

  14. COLLOQUIUM: Exploring Mars With Curiosity and Its Laser | Princeton Plasma

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  15. Exploring Mars with Curiosity subject of next Los Alamos National

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  16. Powering Curiosity: Lab Tech Goes to Mars | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

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  17. IEEE TRANSACTIONS ON ROBOTICS AND AUTOMATION, VOL. 17, NO. 6, DECEMBER 2001 939 Design and Analysis of a Sun Sensor for Planetary Rover

    E-Print Network [OSTI]

    Huntsberger, Terry

    of a Sun Sensor for Planetary Rover Absolute Heading Detection Ashitey Trebi-Ollennu, Terry Huntsberger sun sensor for absolute heading detection developed for the Field Integrated, Design and Operations of the rovers NASA/Jet Propulsion Laboratory (JPL) plans to send to Mars in 2003. Our goal was to develop a sun

  18. Laboratory Curiosity rover ChemCam team, including Los Alamos National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  19. National Aeronautics and Space Administration www.nasa.gov

    E-Print Network [OSTI]

    Radioisotope Power System -- a Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) Science Instruments Environmental Instruments REMS -- Rover Environmental Monitoring Station RAD -- Radiation Assessment Detector DAN -- Dynamic Albedo of Neutrons An artist's concept of the Curiosity rover on Mars. Credit: NASA

  20. Determining Nighttime Atmospheric Optical Depth Using Mars Exploration Rover Images 

    E-Print Network [OSTI]

    Bean, Keri Marie

    2013-07-22

    was compared to the expected flux to give nighttime optical depth values. The observed nighttime optical depth was consistently similar to the daytime optical depth values on both an individual image and sol-averaged basis. Recommendations are made going...

  1. Mars Rover Navigation Results Using Sun Sensor Heading Determination

    E-Print Network [OSTI]

    Volpe, Richard

    -actuator mobility, ap- pendages and algorithms for sampling and periscopic view- ing, improved actuation and sensing

  2. Delta II rocket launching the Mars Exploration Rover,

    E-Print Network [OSTI]

    Torgersen, Christian

    diodes (LEDs), laser diodes, photo detectors, and solar cells. These devices are important of efficient solar cells. Gallium is also used in some unusual applications. Thermal convection in liquidN (gallium nitride), and CIGS (copper-indium-gallium selenide) direct band-gap semiconductors. GaAs and Ga

  3. Mars Rover's ChemCam Instrument gets sharper vision

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Communications Office (505) 667-0471 Email "We think we will actually have better quality images and analyses with this new software than the original," said Wiens. Novel...

  4. Electron Communities The Next Mars Rover What's Lacking with Fracking

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES Science NetworkMediatorElectrocatalysts for

  5. Energy Department Nuclear Systems Are Powering Mars Rover | Department of

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES ScienceInformationInformationFor Defense Labs

  6. New Mars rover findings revealed at American Geophysical Union conference

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJessework usesofPublications64 2.251 2.211 2.196 2.172 2.155Newgains inSky |New

  7. Energy Department Nuclear Systems Are Powering Mars Rover

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansasCommunities Energy Efficiency CompetitionDepartment ofdoe logo U.S.

  8. Energy Department Nuclear Systems Are Powering Mars Rover | Department of

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansasCommunities Energy Efficiency CompetitionDepartment ofdoe logo

  9. ChemCam data abundant at Planetary Conference

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ChemCam data abundant at Planetary Conference ChemCam data abundant at Planetary Conference Members of the Mars Science Laboratory Curiosity rover ChemCam team will present more...

  10. Crazy Engineering Mars Helicopter Transcript Hey guys! We've all seen these RC helicopters before. They're everywhere. They're

    E-Print Network [OSTI]

    Crazy Engineering Mars Helicopter Transcript Hey guys! We've all seen these RC helicopters before to put a helicopter on Mars? If I'm the rover right now, I can't really see the terrain behind me. But if I had a helicopter with a camera on it, all of a sudden, I can see a whole lot more. If our rover

  11. ChemCam Rock Laser for the Mars Science Laboratory

    ScienceCinema (OSTI)

    LANL

    2009-09-01

    Los Alamos has a long history of space-related instr... Los Alamos has a long history of space-related instruments, tied primarily to its role in defense-related treaty verification. Space-based detectors have helped determine the differences between signals from lightning bolts and potential nuclear explosions. LANL-developed gamma-ray detection instruments first revealed the existence of what we now know as gamma-ray bursts, an exciting area of astrophysical research. And the use of LANL instruments on varied space missions continues with such products as the ChemCam rock laser for NASA, shown here. The Engineering Model of the ChemCam Mars Science Laboratory rover instrument arrived at NASA's Jet Propulsion Laboratory on February 6, 2008. ChemCam will use imaging and laser-induced breakdown spectroscopy (LIBS) to determine rock and soil compositions on Mars, up to 9 meters from the rover. The engineering model is being integrated into the rover test bed for the development and testing of the rover software. The actual flight model components are concurrently being assembled at Los Alamos and in Toulouse, France, and will be delivered to JPL in July. The Mars Science Laboratory is scheduled to launch in 2009. Animations courtesy of JPL/NASA.

  12. Vision-based terrain classification and classifier fusion for planetary exploration rovers

    E-Print Network [OSTI]

    Halatci, Ibrahim

    2006-01-01

    Autonomous rover operation plays a key role in planetary exploration missions. Rover systems require more and more autonomous capabilities to improve efficiency and robustness. Rover mobility is one of the critical components ...

  13. Meteorological predictions for the Beagle 2 mission to Mars Scot C. Randell Rafkin,1

    E-Print Network [OSTI]

    Rafkin, Scot C. R.

    circulations, but these are modulated by changes in the large-scale circulation. INDEX TERMS: 0343 Atmospheric Composition and Structure: Planetary atmospheres (5405, 5407, 5409, 5704, 5705, 5707); 6225 Planetology: Solar5 were used during the selection process for the Mars Exploration Rovers [Rafkin and Michaels, 2003

  14. LANL Researcher Roger Wiens Discusses ChemCam

    ScienceCinema (OSTI)

    Wiens, Roger

    2014-08-12

    Discussion of the ChemCam instrument on the Curiosity Rover that occurred during the NASA press conference prior to launch of the Mars Science Laboratory. The ChemCam instrument was developed by Los Alamos National Laboratory and the French Space Institute. Los Alamos National Laboratory researcher Roger Wiens discusses the instrument on this video. ChemCam uses a laser to "zap" features of the Martian landscape and then uses a spectrometer to gather information about the composition of the sample. ChemCam will help the Curiosity Rover determine whether Mars is or was habitable. The Rover is expected to touch down on the Red Planet on August 5, 2012.

  15. Learning to visually predict terrain properties for planetary rovers

    E-Print Network [OSTI]

    Brooks, Christopher Allen, 1978-

    2009-01-01

    For future planetary exploration missions, improvements in autonomous rover mobility have the potential to increase scientific data return by providing safe access to geologically interesting sites that lie in rugged ...

  16. Calibrating the ChemCam LIBS for carbonate minerals on Mars

    SciTech Connect (OSTI)

    Wiens, Roger C; Clegg, Samuel M; Ollila, Ann M; Barefield, James E; Lanza, Nina; Newsom, Horton E

    2009-01-01

    The ChemCam instrument suite on board the NASA Mars Science Laboratory (MSL) rover includes the first LIBS instrument for extraterrestrial applications. Here we examine carbonate minerals in a simulated martian environment using the LIDS technique in order to better understand the in situ signature of these materials on Mars. Both chemical composition and rock type are determined using multivariate analysis (MVA) techniques. Composition is confirmed using scanning electron microscopy (SEM) techniques. Our initial results suggest that ChemCam can recognize and differentiate between carbonate materials on Mars.

  17. Nuclear rocket performance based on Rover/NERVA technology

    SciTech Connect (OSTI)

    Kirk, W.L.

    1990-01-01

    It has been suggested that the 1955-1972 nuclear rocket development (Rover) program provides a strong foundation for a renewed nuclear engine development effort. It is concluded that there is an extensive development base deriving from the Rover/NERVA program for bead-loaded graphite-fueled reactors (Isp = 825-900 s), a moderate base for composite fuel (Isp = 875-925 s), and a modest base for carbide fuel (Isp = 975-1025 s). For carbide fuel and to some extent for composite fuel, there is a potential for considerable increase in reactor core and presumable engine lifetime with only modest reduction in Isp.

  18. Rover Traverse Science for Increased Mission Science Return

    E-Print Network [OSTI]

    analysis technology for increasing science return from missions. Our technology evaluates the geologic data the primary features populating the Martian landscape. Characterization and understanding of rocks on the surface is a first step leading towards more complex in situ regional geological assessments by the rover

  19. A Battery Health Monitoring Framework for Planetary Rovers

    E-Print Network [OSTI]

    Daigle, Matthew

    A Battery Health Monitoring Framework for Planetary Rovers Matthew Daigle NASA Ames Research Center Moffett Field, CA 94035 chetan.s.kulkarni@nasa.gov Abstract--Batteries have seen an increased use source. An important aspect of using batteries in such contexts is battery health monitoring. Batteries

  20. Enhanced Mars Rover Navigation Techniques Richard Volpe Tara Estlin Sharon Laubach

    E-Print Network [OSTI]

    Volpe, Richard

    the terrain from periscopic cameras, select a path through the terrain to the edge of the effective stereo

  1. Measuring Nighttime Atmospheric Opacity Using Images From the Mars Exploration Rovers 

    E-Print Network [OSTI]

    Bean, Keri M

    2012-07-11

    Atmospheric opacity, otherwise known as optical depth, is the measurement of the amount of radiation reaching the surface through the atmosphere. The spatial and temporal patterns in optical depth tell us about the aerosol and cloud cycles...

  2. Structure and stratigraphy of Home Plate from the Spirit Mars Exploration Rover

    E-Print Network [OSTI]

    Grotzinger, John P.

    a quantitative analysis of the structure, stratigraphy, and sedimentology at this location. Our results observations of the sedimentology show that grain sorting varies significantly between outcrops on the east

  3. NASA agreements advance Mars exploration, Los Alamos Rover instrument a key

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJessework usesof Energy Moving Forward tocomponent NASA agreements

  4. Quick Fix Gives Mars Rover's ChemCam Sharper Vision | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report Appendices |Project Management|EnergyAprilEnergy Quick

  5. Find us on Facebook myscienceacademy.org

    E-Print Network [OSTI]

    Chiao, Jung-Chih

    Find us on Facebook myscienceacademy.org 144,123 people like myscienceacademy.org. Facebook social In Recommendations Log in to Facebook to see your friends' recommendations. 24 Places That Look Not Normal, But Are Actually Real 183,768 people recommend this. NASA rover Curiosity finds water in Mars s report 1,823 people

  6. By moving the front wheels in and back wheels out, the rover can

    E-Print Network [OSTI]

    Withers, Paul

    . Solar arrays Provide power for driving the rover, operating the science instruments, heating resolution is more than three times more powerful than previous rovers'. Images will help select rock. The images provided the sci- entists with their first glimpse of their home away from home -- an area

  7. The Mars Hopper: a radioisotope powered, impulse driven, long-range, long-lived mobile platform for exploration of Mars

    SciTech Connect (OSTI)

    Steven D. Howe; Robert C. O'Brien; William Taitano; Doug Crawford; Nathan Jerred; Spencer Cooley; John Crapeau; Steve Hansen; Andrew Klein; James Werner

    2011-02-01

    Planetary exploration mission requirements are becoming more demanding. Due to the increasing cost, the missions that provide mobile platforms that can acquire data at multiple locations are becoming more attractive. Wheeled vehicles such as the MER rovers have proven extremely capable but have very limited range and cannot traverse rugged terrain. Flying vehicles such as balloons and airplanes have been proposed but are problematic due to the very thin atmospheric pressure and the strong, dusty winds present on Mars. The Center for Space Nuclear Research has designed an instrumented platform that can acquire detailed data at hundreds of locations during its lifetime - a Mars Hopper. The Mars Hopper concept utilizes energy from radioisotopic decay in a manner different from any existing radioisotopic power sources—as a thermal capacitor. By accumulating the heat from radioisotopic decay for long periods, the power of the source can be dramatically increased for short periods. The platform will be able to "hop" from one location to the next every 5-7 days with a separation of 5-10 km per hop. Preliminary designs show a platform that weighs around 52 kgs unfueled which is the condition at deployment. Consequently, several platforms may be deployed on a single launch from Earth. With sufficient lifetime, the entire surface of Mars can be mapped in detail by a couple dozen platforms. In addition, Hoppers can collect samples from all over the planet, including gorges, mountains and crevasses, and deliver them to a central location for eventual pick-up by a Mars Sample Return mission. The status of the Mars Hopper development project at the CSNR is discussed.

  8. The Planet Mars Mars is noticeable

    E-Print Network [OSTI]

    Walter, Frederick M.

    Evidence for Water Sedimentary layerings with salt residues #12;Sedi- mentary Rocks #12;Ingredients Mars has (or had): ·Running water on the surface ·Tectonic activity Could it have supported life? #12;The

  9. Exploring the Role of a Planetary GIS in the Route Selection of Martian Rovers 

    E-Print Network [OSTI]

    Strang, Adam L

    2009-11-26

    The route management of a Martian rover is both complex and perilous. Its perambulations subject to myriad constraints: all the while looking to operate at maximum efficacy within an alien environment under the duress of a prohibitively limited...

  10. MARS OBSERVER Mission Failure

    E-Print Network [OSTI]

    Rhoads, James

    of Mars Observer Mission Failure.. ................... D-12 a. Most Probable Cause: Leakage of NT0 Through Check Valves .................................................................. D-14 b. Potential Cause: Pressure Regulator Failure....................... D-28 c. Potential Cause: Failure of a Pyro Valve Charge

  11. A scaling law for aeolian dunes on Mars, Venus, Earth, and for subaqueous ripples

    E-Print Network [OSTI]

    Philippe Claudin; Bruno Andreotti

    2006-08-07

    The linear stability analysis of the equations governing the evolution of a flat sand bed submitted to a turbulent shear flow predicts that the wavelength $\\lambda$ at which the bed destabilises to form dunes should scale with the drag length $L_{\\rm drag} = \\frac{\\rho_s}{\\rho_f} d$. This scaling law is tested using existing and new measurements performed in water (subaqueous ripples), in air (aeolian dunes and fresh snow dunes), in a high pressure CO$_2$ wind tunnel reproducing conditions close to the Venus atmosphere and in the low pressure CO$_2$ martian atmosphere (martian dunes). A difficulty is to determine the diameter of saltating grains on Mars. A first estimate comes from photographs of aeolian ripples taken by the rovers Opportunity and Spirit, showing grains whose diameters are smaller than on Earth dunes. In addition we calculate the effect of cohesion and viscosity on the dynamic and static transport thresholds. It confirms that the small grains visualised by the rovers should be grains experiencing saltation. Finally, we show that, within error bars, the scaling of $\\lambda$ with $L_{\\rm drag}$ holds over almost five decades. We conclude with a discussion on the time scales and velocities at which these bed instabilities develop and propagate on Mars.

  12. Nuclear rockets: High-performance propulsion for Mars

    SciTech Connect (OSTI)

    Watson, C.W.

    1994-05-01

    A new impetus to manned Mars exploration was introduced by President Bush in his Space Exploration Initiative. This has led, in turn, to a renewed interest in high-thrust nuclear thermal rocket propulsion (NTP). The purpose of this report is to give a brief tutorial introduction to NTP and provide a basic understanding of some of the technical issues in the realization of an operational NTP engine. Fundamental physical principles are outlined from which a variety of qualitative advantages of NTP over chemical propulsion systems derive, and quantitative performance comparisons are presented for illustrative Mars missions. Key technologies are described for a representative solid-core heat-exchanger class of engine, based on the extensive development work in the Rover and NERVA nuclear rocket programs (1955 to 1973). The most driving technology, fuel development, is discussed in some detail for these systems. Essential highlights are presented for the 19 full-scale reactor and engine tests performed in these programs. On the basis of these tests, the practicality of graphite-based nuclear rocket engines was established. Finally, several higher-performance advanced concepts are discussed. These have received considerable attention, but have not, as yet, developed enough credibility to receive large-scale development.

  13. Spatial Coverage Planning and Optimization for a Planetory Exploration Rover Daniel M. Gaines and Tara Estlin and Caroline Chouinard

    E-Print Network [OSTI]

    Schaffer, Steven

    . For example, if the rover receives more solar array input than expected, it may have energy to preform more and resource (e.g. energy, onboard memory) constraints of the rover. The engineering team spends the rest cases, the sequences that are uplinked do not always take full advantage of available op- portunities

  14. Lunar Rover Solar Panel MountTeam Members: Tian Le, Tudor Boiangiu, Jeremy Chan, James Haensel To develop a mechanized mount for a solar panel to

    E-Print Network [OSTI]

    Sun, Yu

    Lunar Rover Solar Panel MountTeam Members: Tian Le, Tudor Boiangiu, Jeremy Chan, James Haensel To develop a mechanized mount for a solar panel to be mounted on a lunar rover. Must be: · capable of orienting panel towards sun · reside on mast extending vertically from rover · capable of unfurling solar

  15. THE MARS HAND LENS IMAGER (MAHLI) FOR THE 2009 MARS SCIENCE LABORATORY. K. S. Edgett1

    E-Print Network [OSTI]

    Schieber, Juergen

    , and stratigraphy. Also, help determine rock type, history/sequence, depositional, diagenetic, and weathering of rover hardware with fines, plus stratigraphy, textures, mineralogy, and depositional processes. 3

  16. Lifecycle Verification of the NASA Ames K9 Rover Executive Dimitra Giannakopoulou1, 3

    E-Print Network [OSTI]

    Pasareanu, Corina

    Lifecycle Verification of the NASA Ames K9 Rover Executive Dimitra Giannakopoulou1, 3 Corina S. Pasareanu2, 3 Michael Lowry3 and Rich Washington4 (1) USRA/RIACS (2) Kestrel Technology LLC (3) NASA Ames Research Center, Moffett Field, CA 94035-1000, USA {dimitra, pcorina, lowry}@email.arc.nasa.gov (4) Google

  17. What to Pack for Mars

    E-Print Network [OSTI]

    De Weck, Olivier L.

    De Weck, O.L. “What to Pack for Mars.” Spectrum, IEEE 46.6 (2009): 39. © 2009 Institute of Electrical and Electronics Engineers

  18. A Tale of 2 Missions (And Hopefully 2 Different Landings)

    SciTech Connect (OSTI)

    Wiens, Roger C.

    2012-07-19

    This talk, to be given at the LANL IGPP Annual Review dinner in Santa Fe, NM on July 17, 2012, highlights two important NASA missions LANL played a key role in: The Genesis mission was the first to return to Earth from beyond the Moon, bearing solar particles to help understand the composition of the Sun; and Curiosity, a 1-ton Mars rover launched to the red planet in 2011 with a suite of instruments from LANL called ChemCam.

  19. MAR Background Report MAR Background Report: Indigenous Protest in Brazil

    E-Print Network [OSTI]

    Milchberg, Howard

    MAR Background Report MAR Background Report: Indigenous Protest in Brazil Hundreds of indigenous people demonstrated at the National Congress in Brasilia, capital of Brazil, following the announcement in the 1990s in the midst of extensive protests in Brazil and around the world. On February 8, an indigenous

  20. New Mexico to Mars

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shinesSolarNew scholarship supports returningNew Mexico to Mars Community

  1. Mars Surveyor Program '01 Mars Environmental Compatibility Assessment wet chemistry lab

    E-Print Network [OSTI]

    Kounaves, Samuel P.

    Mars Surveyor Program '01 Mars Environmental Compatibility Assessment wet chemistry lab: A sensor Department of Chemistry, Tufts University, Medford, Massachusetts, USA Michael H. Hecht, Sabrina M. Grannan] The Mars Environmental Compatibility Assessment (MECA) instrument was designed, built, and flight qualified

  2. Technical and regulatory review of the Rover nuclear fuel process for use on Fort St. Vrain fuel

    SciTech Connect (OSTI)

    Hertzler, T.

    1993-02-01

    This report describes the results of an analysis for processing and final disposal of Fort St. Vrain (FSV) irradiated fuel in Rover-type equipment or technologies. This analysis includes an evaluation of the current Rover equipment status and the applicability of this technology in processing FSV fuel. The analyses are based on the physical characteristics of the FSV fuel and processing capabilities of the Rover equipment. Alternate FSV fuel disposal options are also considered including fuel-rod removal from the block, disposal of the empty block, or disposal of the entire fuel-containing block. The results of these analyses document that the current Rover hardware is not operable for any purpose, and any effort to restart this hardware will require extensive modifications and re-evaluation. However, various aspects of the Rover technology, such as the successful fluid-bed burner design, can be applied with modification to FSV fuel processing. The current regulatory climate and technical knowledge are not adequately defined to allow a complete analysis and conclusion with respect to the disposal of intact fuel blocks with or without the fuel rods removed. The primary unknowns include the various aspects of fuel-rod removal from the block, concentration of radionuclides remaining in the graphite block after rod removal, and acceptability of carbon in the form of graphite in a high level waste repository.

  3. Nuclear Risk Assessment for the Mars 2020 Mission Environmental Impact Statement

    SciTech Connect (OSTI)

    Clayton, Daniel J.; Bignell, John; Jones, Christopher A.; Rohe, Daniel P.; Flores, Gregg J.; Bartel, Timothy J.; Gelbard, Fred; Le, San; Morrow, Charles W.; Potter, Donald L.; Young, Larry W.; Bixler, Nathan E.; Lipinski, Ronald J.

    2014-01-01

    In the summer of 2020, the National Aeronautics and Space Administration (NASA) plans to launch a spacecraft as part of the Mars 2020 mission. One option for the rover on the proposed spacecraft uses a Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) to provide continuous electrical and thermal power for the mission. An alternative option being considered is a set of solar panels for electrical power with up to 80 Light-Weight Radioisotope Heater Units (LWRHUs) for local component heating. Both the MMRTG and the LWRHUs use radioactive plutonium dioxide. NASA is preparing an Environmental Impact Statement (EIS) in accordance with the National Environmental Policy Act. The EIS will include information on the risks of mission accidents to the general public and on-site workers at the launch complex. This Nuclear Risk Assessment (NRA) addresses the responses of the MMRTG or LWRHU options to potential accident and abort conditions during the launch opportunity for the Mars 2020 mission and the associated consequences. This information provides the technical basis for the radiological risks of both options for the EIS.

  4. Earth plus Mars: Los Alamos National

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    plus Mars: Los Alamos National Lab partners with Spain and France June 26, 2015 Earth plus Mars: Los Alamos National Lab partners with Spain and France New Mexico's role in the...

  5. European Space Agency European Mars Science and Exploration Conference: Mars Express & ExoMars

    E-Print Network [OSTI]

    Withers, Paul

    flares (and/or plumes), seismic shaking and crater excavation [7]. These effects have been modelled between the different instruments, require no hardware modification or space qualification of "soft-landing; and seismic detection of impact event clusters correlated with Mars' passage through low- speed meteoroid

  6. Computer Architecture (13 Mar 2008)

    E-Print Network [OSTI]

    Park, Seung-Jong "Jay"

    1 Computer Architecture (CSC-3501) Lecture 15 1 Lecture 15 (13 Mar 2008) Seung-Jong Park (Jay) http://www.csc.lsu.edu/~sjpark CSC3501 - S.J. Park Announcement 2 CSC3501 - S.J. Park 4.14 Real World Architectures MARIE shares many features with modern architectur es but it is not an accurate depiction of them. In the following slides

  7. Nuclear technologies for Moon and Mars exploration

    SciTech Connect (OSTI)

    Buden, D.

    1991-01-01

    Nuclear technologies are essential to successful Moon and Mars exploration and settlements. Applications can take the form of nuclear propulsion for transport of crews and cargo to Mars and the Moon; surface power for habitats and base power; power for human spacecraft to Mars; shielding and life science understanding for protection against natural solar and cosmic radiations; radioisotopes for sterilization, medicine, testing, and power; and resources for the benefits of Earth. 5 refs., 9 figs., 3 tabs.

  8. THE MARS ENVIRONMENTAL COMPATIBILITY ASSESSMENT (MECA) WET CHEMISTRY EXPERIMENT ON THE MARS '01 LANDER

    E-Print Network [OSTI]

    Kounaves, Samuel P.

    THE MARS ENVIRONMENTAL COMPATIBILITY ASSESSMENT (MECA) WET CHEMISTRY EXPERIMENT ON THE MARS '01 of Chemistry, TuftsUniversity, Medford, MA, 02155 4 Mineral Processing Department, West Virginia University, Morgantown, WV, 26507 Introduction. The Mars Environmental Compatibility Assessment (MECA) is an instrument

  9. MAVEN overview MAVEN is a NASA Mars Scout mission designed to orbit Mars

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    MAVEN overview MAVEN is a NASA Mars Scout mission designed to orbit Mars and explore the state-Boulder professor and LASP research scientist, leads the project on behalf of NASA. Jakosky worked with a national of primary mission Mission description: MAVEN is a NASA Mars Scout mission carrying eight instruments

  10. 2011 MARS Refresher Presentation (2 of 3)

    ScienceCinema (OSTI)

    None

    2011-10-06

    Information sessions that shall outline the general principles of the 2011 annual Merit, Appraisal and Recognition Scheme (MARS). Presentation will be given in English.

  11. 2010 MARS Refresher Presentation (3 of 3)

    ScienceCinema (OSTI)

    None

    2011-10-06

    Information sessions that shall outline the general principles of the 2010 annual Merit, Appraisal and Recognition Scheme (MARS). Presentation will be given in English.

  12. Mars Exploration Rover (MER) Panoramic Camera (Pancam) Twilight Image Analysis for Determination of Planetary Boundary Layer and Dust Particle Size Parameters 

    E-Print Network [OSTI]

    Grounds, Stephanie Beth

    2012-02-14

    Thermal Emission Spectrometer (Mini- TES) thermal infrared spectra (Smith et al., 2006). MER-based Mini-TES spectra have been used in the determination of generalized boundary layer parameters for Martian GCMs. Mini-TES spectra were collected in both... superadiabatic layer found near the surface (Smith et al., 2006). Mini-TES observations were used to observe general timescales, duration times, and overall intensities of multiple local- and regional-scale dust storms, and upward-looking Mini-TES research can...

  13. The 2013 MAVEN Mission To Mars

    E-Print Network [OSTI]

    Of Martian Atmosphere Turn-off of the Martian magnetic field allowed turn-on of solar-EUV and solar · Spacecraft Dry Mass: 903 kg max · Power: 1135 W at Mars Aphelion MAG (2) "Gull-Wing" Solar Arrays LPW (2 latitude and local solar time · One-Earth-year mission allows thorough coverage of near-Mars space #12

  14. Mar

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Livermore, CA 94550, USA 10 Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA 11 Jet Propulsion Laboratory, California Institute of Technol- ogy,...

  15. The MAVEN mission to Mars and my role in it

    E-Print Network [OSTI]

    Withers, Paul

    of the environmental requirements for the occurrence of life: · Liquid water · Access to the biogenic elements · Source With Mars #12;Overarching Question: Did Mars Ever Have Life? Mars appears to meet or have met all of energy to drive metabolism Did Mars ever have life? How did any life interact with its planetary

  16. 02/02 NASA JSC Astrobiology: Fingerprints of Life Searching for Life: Mars Critters 1 Mars Critters

    E-Print Network [OSTI]

    Waliser, Duane E.

    to handle the constant radiation on the surface of Mars. Also the dominant gas in the Mars atmosphere Destination: Mars. In groups or as individuals, students will use their knowledge of Mars and living organisms up various art supplies at each table for either individual work or small group work. This activity

  17. 1. Get in touch if you have any ?'s about the industry or life after Penn! And to satiate what I'm sure is burning curiosity... I took the bus.4:22 PM Feb 17th via web

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    'm sure is burning curiosity... I took the bus.4:22 PM Feb 17th via web 2. Well guys, that's it for my day!! Off to see what the post fashion week new york night has to offer...4:18 PM Feb 17th via web 3 to come in for the month.4:06 PM Feb 17th via web 4. Well, it's getting quiet around here now that shows

  18. Solar discrepancies : Mars exploration and the curious problem of inter-planetary time

    E-Print Network [OSTI]

    Mirmalek, Zara Lenora

    2008-01-01

    Monterey, California. Solar Discrepancies: Mars explorationCALIFORNIA, SAN DIEGO Solar discrepancies: Mars explorationOF THE DISSERTATION Solar discrepancies: Mars exploration

  19. The surface of Mars : morphology and process

    E-Print Network [OSTI]

    Aharonson, Oded, 1973-

    2002-01-01

    The goal of this work is a quantitative description of the morphology of the surface of Mars, in order to constrain the nature of processes acting during the ancient past through today. Emphasis is placed on linking geometric ...

  20. Adaptive control for Mars atmospheric flight 

    E-Print Network [OSTI]

    Restrepo, Carolina Isabel

    2009-05-15

    The new vision for space exploration will focus on sending humans to the moon and eventually to Mars. This endeavor presents new challenges that are critically di?erent from the past experience with robotic missions to ...

  1. Microbial iron reduction on Earth and Mars 

    E-Print Network [OSTI]

    Nixon, Sophie Louise

    2014-11-27

    The search for life beyond Earth is the driving force behind several future missions to Mars. An essential task in the lead-up to these missions is a critical assessment of the habitability for, and feasibility of, life. ...

  2. Remote sensing of surface pressure on Mars with the Mars Express/OMEGA spectrometer

    E-Print Network [OSTI]

    Spiga, Aymeric

    - surement of surface pressure from orbit, as is done for temperature or water vapor [Smith, 2006]. [4Remote sensing of surface pressure on Mars with the Mars Express/OMEGA spectrometer: 2 November 2006; revised 6 July 2007; accepted 7 August 2007; published 30 August 2007. [1] Surface pressure

  3. Localized precipitation and runoff on Mars

    E-Print Network [OSTI]

    Kite, Edwin S; Rafkin, Scot; Manga, Michael; Dietrich, William E

    2010-01-01

    We use the Mars Regional Atmospheric Modeling System (MRAMS) to simulate lake storms on Mars, finding that intense localized precipitation will occur for lake size >=10^3 km^2. Mars has a low-density atmosphere, so deep convection can be triggered by small amounts of latent heat release. In our reference simulation, the buoyant plume lifts vapor above condensation level, forming a 20km-high optically-thick cloud. Ice grains grow to 200 microns radius and fall near (or in) the lake at mean rates up to 1.5 mm/hr water equivalent (maximum rates up to 6 mm/hr water equivalent). Because atmospheric temperatures outside the surface layer are always well below 273K, supersaturation and condensation begin at low altitudes above lakes on Mars. In contrast to Earth lake-effect storms, lake storms on Mars involve continuous precipitation, and their vertical velocities and plume heights exceed those of tropical thunderstorms on Earth. Convection does not reach above the planetary boundary layer for lakes O(10^2) mbar. In...

  4. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    written consent of the publisher #12;Mar Ecol Prog Ser 280: 261­273, 2004 cific mesoscale oceanographic

  5. Mars mission laser tool heads to JPL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse BergkampCentermillion toMSDS onBudget ||EnergyMark Holecek |MarkMarsMars

  6. Tuesday, March 24, 2009 MARS: GROUND ICE AND CLIMATE CHANGE

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Tuesday, March 24, 2009 MARS: GROUND ICE AND CLIMATE CHANGE 1:30 p.m. Waterway Ballroom 1 Chairs.-B. Fastook J. L. Deciphering the Late Amazonian Climate History of Mars: Assessing Obliquity Predictions climate history of Mars; extended periods of consistently high or low obliquity are unlikely during

  7. Humans to Mars Fifty Years of Mission Planning,

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Humans to Mars Fifty Years of Mission Planning, 1950--2000 David S. F. Portree Monographs in Aerospace History #21 NASA SP-2001-4521 Humans to Mars Fifty Years of Mission Planning, 1950--2000 David S. F. Portree #12;Humans to Mars Fifty Years of Mission Planning, 1950­2000 by David S. F. Portree NASA

  8. Recent MARS15 Developments, New Features and Event Generator Modes

    E-Print Network [OSTI]

    McDonald, Kirk

    Recent MARS15 Developments, New Features and Event Generator Modes Fermilab Accelerator Physics-28, 2013 Nikolai Mokhov 8 MARS15 EXCLUSIVE EVENT GENERATORS Improved Cascade-Exciton Model code, CEM03. Mokhov, "CEM03.03 and LAQGSM03.03 Event Generators for the MCNP6, MCNPX and MARS15 Transport Codes", LANL

  9. Interior Structure and Seasonal Mass Redistribution of Mars from Radio

    E-Print Network [OSTI]

    Manga, Michael

    Interior Structure and Seasonal Mass Redistribution of Mars from Radio Tracking of Mars Pathfinder. Analysis of radio tracking measurements from the Vi- king landers has determined the normal- ized polar. The precession is driven by the gravita- tional torque of the sun acting on Mars' oblate figure

  10. Thursday, March 16, 2006 MARS: SEDIMENTS AND GEOCHEMISTRY

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Thursday, March 16, 2006 MARS: SEDIMENTS AND GEOCHEMISTRY 8:30 a.m. Crystal Ballroom A Chairs: N. J of the Proposed Hypotheses for the Origin of Sediments at the Opportunity Landing Site on Mars [#1869] The MER Athena Team interpretation that sediments at the Opportunity Landing Site on Mars are altered eolian

  11. Lidar on the Phoenix mission to Mars James Whiteway,1

    E-Print Network [OSTI]

    Duck, Thomas J.

    Lidar on the Phoenix mission to Mars James Whiteway,1 Michael Daly,2 Allan Carswell,3 Thomas Duck,4 from the surface of Mars as part of the Phoenix mission. This will measure the height profile, and C. Cook (2008), Lidar on the Phoenix mission to Mars, J. Geophys. Res., 113, E00A08, doi:10

  12. Mars Mission Analysis Trades Based on Legacy and Future Nuclear Propulsion Options

    SciTech Connect (OSTI)

    Joyner, Russell [Pratt and Whitney Rocketdyne, West Palm Beach, Florida (United States); Lentati, Andrea [Georgia Institute of Technology, Atlanta, Georgia (United States); Cichon, Jaclyn [University of Florida, Gainesville, Florida (United States)

    2007-01-30

    The purpose of this paper is to discuss the results of mission-based system trades when using a nuclear thermal propulsion (NTP) system for Solar System exploration. The results are based on comparing reactor designs that use a ceramic-metallic (CERMET), graphite matrix, graphite composite matrix, or carbide matrix fuel element designs. The composite graphite matrix and CERMET designs have been examined for providing power as well as propulsion. Approaches to the design of the NTP to be discussed will include an examination of graphite, composite, carbide, and CERMET core designs and the attributes of each in regards to performance and power generation capability. The focus is on NTP approaches based on tested fuel materials within a prismatic fuel form per the Argonne National Laboratory testing and the ROVER/NERVA program. NTP concepts have been examined for several years at Pratt and Whitney Rocketdyne for use as the primary propulsion for human missions beyond earth. Recently, an approach was taken to examine the design trades between specific NTP concepts; NERVA-based (UC)C-Graphite, (UC,ZrC)C-Composite, (U,Zr)C-Solid Carbide and UO2-W CERMET. Using Pratt and Whitney Rocketdyne's multidisciplinary design analysis capability, a detailed mission and vehicle model has been used to examine how several of these NTP designs impact a human Mars mission. Trends for the propulsion system mass as a function of power level (i.e. thrust size) for the graphite-carbide and CERMET designs were established and correlated against data created over the past forty years. These were used for the mission trade study. The resulting mission trades presented in this paper used a comprehensive modeling approach that captures the mission, vehicle subsystems, and NTP sizing.

  13. THE LONGEST MEANDERING FLOODPLAIN ON MARS: THE AEOLIS MEANDERS Edwin S. Kite (UC Berkeley), Rebecca M.E. Williams (Planetary Science Institute), Noah J. Finnegan (UC Santa

    E-Print Network [OSTI]

    be undertaken and addressed by a rover within this el- lipse, including but not limited to: sedimentology

  14. Risk Management, Mar 2012 Risk Management

    E-Print Network [OSTI]

    Risk Management, Mar 2012 Risk Management Conditions of Volunteer Service (Please send completed form to the Office of Risk Management) riskmanagement@uoregon.edu Fax: 541-346-7008 As a volunteer Tort Claims Act, ORS 30.260-300, and Oregon Department of Administrative Services Risk Management

  15. Project Management in NASA Mars Climate Orbiter

    E-Print Network [OSTI]

    Rhoads, James

    by the Mars Climate Orbiter Mishap Investigation Board F. Recurring Themes From Failure Investigations and Control Center Navigation and Control Center Goddard Space Flight Center Goddard Space Flight Center Merwarth NASA/GSFC-retired Expert in ground operations & flight software development Moshe F. Rubinstein

  16. The MAVEN Mission: Exploring Mars' Climate

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    at launch ·Spacecraft Dry Mass: 810 kg at launch ·Power: 1135 W at Mars Aphelion MAG (2) "Gull-Wing" Solar Us to Understand Escape of Atmospheric Gases to Space #12;The Solar Wind is Able to Strip Off Gas-Related Proper1es and Processes LPW MAG STATIC Sun, Solar Wind, Solar Storms SWIA EUV

  17. Product specification Supersedes data 1998 Mar 24

    E-Print Network [OSTI]

    Ida, Nathan

    DATA SHEET Product specification Supersedes data 1998 Mar 24 2000 Jun 13 DISCRETE SEMICONDUCTORS KMZ51 Magnetic field sensor M3D495 #12;2000 Jun 13 2 Philips Semiconductors Product specification output voltage 8 -Iflip flip coil handbook, halfpage 41 58 MGD827 pin 1 index Hext Fig.1 Simplified

  18. Materials characterization activities for %E2%80%9CTake Our Sons&Daughters to Work Day%E2%80%9D 2013.

    SciTech Connect (OSTI)

    Mowry, Curtis Dale; Pimentel, Adam S.; Sparks, Elizabeth Schares; Hanlon, Brittany Paula

    2013-09-01

    We created interactive demonstration activities for Take Our Daughters&Sons to Work Day (TODSTWD) 2013 in order to promote general interest in chemistry and also generate awareness of the type of work our laboratories can perform. %E2%80%9CCurious about Mars Rover Curiosity?%E2%80%9D performed an elemental analysis on rocks brought to our lab using the same technique utilized on the planet Mars by the NASA robotic explorer Curiosity. %E2%80%9CFood is Chemistry?%E2%80%9D utilized a mass spectrometer to measure, in seconds, each participant's breath in order to identify the food item consumed for the activity. A total of over 130 children participated in these activities over a 3 hour block, and feedback was positive. This document reports the materials (including handouts), experimental procedures, and lessons learned so that future demonstrations can benefit from the baseline work performed. We also present example results used to prepare the Food activity and example results collected during the Curiosity demo.

  19. Microsoft Word - ex1b-ITER-mar07.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PATENT RIGHTS - ACQUISITION BY THE GOVERNMENT - ITER (Mar 2007) (a) Definitions. (1) "Invention", as used in this clause, means any invention or discovery which is or may be...

  20. Modeling the variations of Dose Rate measured by RAD during the first MSL Martian year: 2012-2014

    E-Print Network [OSTI]

    Guo, Jingnan; Wimmer-Schweingruber, Robert F; Rafkin, Scot; Hassler, Donald M; Posner, Arik; Heber, Bernd; Koehler, Jan; Ehresmann, Bent; Appel, Jan K; Boehm, Eckart; Boettcher, Stephan; Burmeister, Soenke; Brinza, David E; Lohf, Henning; Martin, Cesar; Kahanpaeae, H; Reitz, Guenther

    2015-01-01

    The Radiation Assessment Detector (RAD), on board Mars Science Laboratory's (MSL) rover Curiosity, measures the {energy spectra} of both energetic charged and neutral particles along with the radiation dose rate at the surface of Mars. With these first-ever measurements on the Martian surface, RAD observed several effects influencing the galactic cosmic ray (GCR) induced surface radiation dose concurrently: [a] short-term diurnal variations of the Martian atmospheric pressure caused by daily thermal tides, [b] long-term seasonal pressure changes in the Martian atmosphere, and [c] the modulation of the primary GCR flux by the heliospheric magnetic field, which correlates with long-term solar activity and the rotation of the Sun. The RAD surface dose measurements, along with the surface pressure data and the solar modulation factor, are analysed and fitted to empirical models which quantitatively demonstrate} how the long-term influences ([b] and [c]) are related to the measured dose rates. {Correspondingly we ...

  1. Communiqu de presse Lyon, le 20 mars 2014

    E-Print Network [OSTI]

    Dellandréa, Emmanuel

    Communiqué de presse Lyon, le 20 mars 2014 3 000 étudiants pour la 32ème édition du Challenge Centrale Lyon Ce weekend du 22 et 23 mars 2014, l'école Centrale Lyon (Ecully) accueille sur son campus

  2. EWO Meeting, Mar. 2008, Pittsburgh, PA Risk Management

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    EWO Meeting, Mar. 2008, Pittsburgh, PA Risk Management Risk Management for Chemical Supply Chain, PA Risk Management Chemical Supply chain: an integrated network of business units for the supply #12;Page 3EWO Meeting, Mar. 2008, Pittsburgh, PA Risk Management Motivation Introduction · Objective

  3. Selection and Technology Evaluation of Moon/Mars Transportation Architectures

    E-Print Network [OSTI]

    de Weck, Olivier L.

    Selection and Technology Evaluation of Moon/Mars Transportation Architectures Gergana A. Bounova of Technology, Cambridge, MA 02139 Our purpose is to evaluate and select from a large family of Moon-Mars transportation architectures by integrating a general architecture network model with vehicle computa- tional

  4. Oceanography Vol.18, No.1, Mar. 2005 65 OCEANOGRAPHY

    E-Print Network [OSTI]

    Yen, Jeannette

    Oceanography Vol.18, No.1, Mar. 2005 65 WOMEN IN OCEANOGRAPHY AU TO B I O G R A PH I C A L S K E TC H E S O F Oceanography Vol.18, No.1, Mar. 2005 65 This article has been published in Oceanography, Volume 18, Number 1, a quarterly journal of The Oceanography Society. Copyright 2005 by The Oceanography

  5. The Global Topography of Mars and Implications for Surface

    E-Print Network [OSTI]

    Hauck II, Steven A.

    The Global Topography of Mars and Implications for Surface Evolution David E. Smith,1 * Maria T- accuracy global map of the topography of Mars. Dominant features include the low northern hemisphere-wavelength effect that has been shaped by an internal mechanism. The topography of Tharsis consists of two broad

  6. Simulations of the Mars ionosphere during a solar flare

    E-Print Network [OSTI]

    Withers, Paul

    .05.23 08:00-10:00 Spring AGU Meeting 2006, Acapulco, Mexico #12;Increased fluxes of X-rays during solarSimulations of the Mars ionosphere during a solar flare Paul Withers, Joei Wroten, Michael Mendillo simulations of the Mars ionosphere driven by temporally-varying solar fluxes, concentrating on 15 and 26 April

  7. CRISM: Exploring the Geology of Mars Tech Splash Open Music

    E-Print Network [OSTI]

    CRISM: Exploring the Geology of Mars Tech Splash Open Music Exploring the geology of Mars Marineris simply pulled apart, we would expect the geology on the North and South side of the canyon that make up the rocks. Using the CRISM data we can put together a very simplistic geologic profile

  8. Regionally compartmented groundwater flow on Mars Keith P. Harrison1

    E-Print Network [OSTI]

    Harrison, Keith

    Regionally compartmented groundwater flow on Mars Keith P. Harrison1 and Robert E. Grimm1 Received] Groundwater flow on Mars likely contributed to the formation of several types of morphologic and mineralogic of groundwater flow required for their formation. For groundwater simulation purposes, a global Martian aquifer

  9. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Grutter, Alexandra "Lexa"

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser 1 Published January 11 Parasite removal rates is dependent on the rates at which par- asites are removed by cleaner fish and added through colonization-Research 1996 Resale of full article not permitted #12;Mar Ecol Prog Ser 130:61-70, 1996 of daily consumption

  10. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Krug, Patrick J.

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 312: 149­159, 2006 Published April 24 therefore have limited time to locate and colonize a suitable adult habitat. Domi- nant spatial competitors consent of the publisher #12;Mar Ecol Prog Ser 312: 149­159, 2006 energy reserves, they became `desperate

  11. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Denny, Mark

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 522: 127­143, 2015 doi: 10.3354/meps11117 on experimental plates colonized by natural microalgae. Limpet species found higher on the shore had lower peak without written consent of the publisher #12;Mar Ecol Prog Ser 522: 127­143, 2015 In the rocky intertidal

  12. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Pawlik, Joseph

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 368: 137­143, 2008 doi: 10.3354/meps07615 and reproduction, thereby also enhancing their ability to colonize open space. As for some plant communities without written consent of the publisher #12;Mar Ecol Prog Ser 368: 137­143, 2008 primary limiting

  13. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Shima, Jeff

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 472: 239­248, 2013 doi: 10.3354/meps10015 in the system via a range of mechanisms, including competition-colonization tradeoffs (Levins & Culver 1971 holder(s). It may be distributed to interested individuals on request. #12;Mar Ecol Prog Ser 472: 239

  14. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Stachowicz, Jay

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 398: 69­80, 2010 doi: 10.3354/meps08341 surfaces for colonization that adequately compensate for the primary substrate it exploits, its high consent of the publisher #12;Mar Ecol Prog Ser 398: 69­80, 2010 Rodriguez 2006, Heiman et al. 2008

  15. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 262: 19­25, 2003 Published November 7 blocked access to ice-free terrain for breeding. The first colonization of Ross Island in East Mc;Mar Ecol Prog Ser 262: 19­25, 2003 guins (Baroni &

  16. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Pawlik, Joseph

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 465: 111­117, 2012 doi: 10.3354/meps09904. laevis neither affected the frequency of colonization of Montastraea annularis by boring sponges, nor individuals on request. #12;Mar Ecol Prog Ser 465: 111­117, 2012 tem are altered. These context

  17. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Love, Milton

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 344: 245­256, 2007 doi: 10.3354/meps06929 findings suggest that trophic pathways on other types of artificial structures colonized by exotic species · Artificial reef Resale or republication not permitted without written consent of the publisher #12;Mar Ecol

  18. Real-time graphic displays in Mars. [AVLIS process

    SciTech Connect (OSTI)

    Treadway, T.

    1985-12-01

    Real-time diagnostic data of the AVLIS process is displayed in the form of a two-dimensional plot on selected monitors in the Mars Control Room. Each Mars workstation contains a HP2622 terminal for computer interface to the experiment and a Raster Technologies graphic controller driving a Conrac high resolution color monitor for graphics output.

  19. Remote Terrestrial Sites as Operational/Logistics Analogs for Moon/Mars Bases: the Haughton Mars Project

    E-Print Network [OSTI]

    de Weck, Olivier L.

    Remote Terrestrial Sites as Operational/Logistics Analogs for Moon/Mars Bases: the Haughton Mars coordinating the logistics and resupply of far-flung planetary bases. A number of logistics methods have been terrestrial logistics methods were tested in the context of (analog) planetary exploration. A comprehensive

  20. Widespread Excess Ice in Arcadia Planitia, Mars

    E-Print Network [OSTI]

    Bramson, Ali M; Putzig, Nathaniel E; Sutton, Sarah; Plaut, Jeffrey J; Brothers, T Charles; Holt, John W

    2015-01-01

    The distribution of subsurface water ice on Mars is a key constraint on past climate, while the volumetric concentration of buried ice (pore-filling versus excess) provides information about the process that led to its deposition. We investigate the subsurface of Arcadia Planitia by measuring the depth of terraces in simple impact craters and mapping a widespread subsurface reflection in radar sounding data. Assuming that the contrast in material strengths responsible for the terracing is the same dielectric interface that causes the radar reflection, we can combine these data to estimate the dielectric constant of the overlying material. We compare these results to a three-component dielectric mixing model to constrain composition. Our results indicate a widespread, decameters-thick layer that is excess water ice ~10^4 km^3 in volume. The accumulation and long-term preservation of this ice is a challenge for current Martian climate models.

  1. Nuclear power systems for Lunar and Mars exploration

    SciTech Connect (OSTI)

    Sovie, R.J.; Bozek, J.M.

    1994-09-01

    Initial studies of a variety of mission scenarios for the new Space Exploration Initiative, and the technologies necessary to enable or significantly enhance them, have identified the development of advanced space power systems - whether solar, chemical or nuclear - to be of prime importance. Lightweight, compact, reliable power systems for planetary rovers and a variety of surface vehicles, utility surface power, and power for advanced propulsion systems were identified as critical needs for these missions. This paper discusses these mission scenarios, the concomitant power system requirements; the power system options considered and identifies the significant potential benefits of nuclear power for meeting the power needs of the above applications.

  2. Conference

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    data abundant at Planetary Conference March 15, 2013 Laser instrument aboard Curiosity rover provides well over 40,000 shots so far LOS ALAMOS, N. M., March 15, 2013-Members of the...

  3. Edgar_Answers to student questions 414.pdf Student questions: Lauren Edgar colloquium on "Martian Sedimentology as Revealed by the

    E-Print Network [OSTI]

    Rhoads, James

    Sedimentology as Revealed by the Curiosity Rover" 3/26/14 Question 1: How are the studies that you've done of the same kinds of instruments to investigate the sedimentology and stratigraphy at each landing site

  4. Mixed convection and heat management in the Mars gravity biosatellite

    E-Print Network [OSTI]

    Marsh, Jesse B. (Jesse Benjamin)

    2007-01-01

    The Mars Gravity Biosatellite will house fifteen mice in a low Earth orbit satellite spinning about its longitudinal axis. The satellite's payload thermal control system will reject heat through the base of the payload ...

  5. Infrared Brightness Temperature of Mars, 1983-2103

    E-Print Network [OSTI]

    E. L. Wright

    2007-03-25

    The predicted infrared brightness temperature of Mars using the 1976 model of Wright is tabulated here for the period 1983 to 2103. This model was developed for far-infrared calibration, and is still being used for JCMT calibration.

  6. Geomorphometric analysis of Hebes Chasma, Mars, using the GRASS GIS. 

    E-Print Network [OSTI]

    Harrison, Samantha

    This research addressed the local scale geomorphometric analysis of the Hebes Chasma region on Mars, utilising a new 50 m/pixel digital terrain model derived from stereo imagery. A secondary aspect of the research addressed the role of GIS...

  7. Design of spacecraft for exploration of the Moon and Mars

    E-Print Network [OSTI]

    Epps, Brenden P

    2006-01-01

    In this thesis, I develop the conceptual design of the spacecraft required for human-Lunar and human-Mars exploration. The requirements for these vehicles are derived in the context of the NASA Concept Exploration & ...

  8. First phase beamlines at CLS PROPOSED & UNDER REVIEW (Mar 2001)

    E-Print Network [OSTI]

    Hitchcock, Adam P.

    First phase beamlines at CLS PROPOSED & UNDER REVIEW (Mar 2001) X-ray Emission Alex Moewes (U. Sask 27 June 2000 27 June 2000 27-Feb 2001 27-Feb 2001 27-Feb 2001 #12;

  9. Integrated navigation architecture analysis for Moon and Mars exploration

    E-Print Network [OSTI]

    Chabot, Thomas

    2005-01-01

    The new solar system exploration objectives announced in January 2004 have the goal of sending humans back to the Moon by the year 2020 in preparation for human exploration of Mars. Advanced, but cost effective, surface ...

  10. A Mars-back approach to lunar surface operations

    E-Print Network [OSTI]

    Kleinwaks, Howard Neil

    2005-01-01

    The Vision for Space Exploration initiated a new space exploration program and called for a long term national commitment to space exploration starting with a return to the Moon and continuing with the exploration of Mars ...

  11. Geophysical evolution of planetary interiors and surfaces : Moon & Mars

    E-Print Network [OSTI]

    Evans, Alexander Joseph

    2013-01-01

    The interiors and surfaces of the terrestrial planetary bodies provide us a unique opportunity to gain insight into planetary evolution, particularly in the early stages subsequent to accretion. Both Mars and the Moon are ...

  12. exploration, Los Alamos Rover

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLos AlamosSimulationdetonationdustin13UnderstandingNASA agreements

  13. Propulsion engineering study for small-scale Mars missions

    SciTech Connect (OSTI)

    Whitehead, J.

    1995-09-12

    Rocket propulsion options for small-scale Mars missions are presented and compared, particularly for the terminal landing maneuver and for sample return. Mars landing has a low propulsive {Delta}v requirement on a {approximately}1-minute time scale, but at a high acceleration. High thrust/weight liquid rocket technologies, or advanced pulse-capable solids, developed during the past decade for missile defense, are therefore more appropriate for small Mars landers than are conventional space propulsion technologies. The advanced liquid systems are characterize by compact lightweight thrusters having high chamber pressures and short lifetimes. Blowdown or regulated pressure-fed operation can satisfy the Mars landing requirement, but hardware mass can be reduced by using pumps. Aggressive terminal landing propulsion designs can enable post-landing hop maneuvers for some surface mobility. The Mars sample return mission requires a small high performance launcher having either solid motors or miniature pump-fed engines. Terminal propulsion for 100 kg Mars landers is within the realm of flight-proven thruster designs, but custom tankage is desirable. Landers on a 10 kg scale also are feasible, using technology that has been demonstrated but not previously flown in space. The number of sources and the selection of components are extremely limited on this smallest scale, so some customized hardware is required. A key characteristic of kilogram-scale propulsion is that gas jets are much lighter than liquid thrusters for reaction control. The mass and volume of tanks for inert gas can be eliminated by systems which generate gas as needed from a liquid or a solid, but these have virtually no space flight history. Mars return propulsion is a major engineering challenge; earth launch is the only previously-solved propulsion problem requiring similar or greater performance.

  14. Economic Development Benefits of the Mars Hill Wind Farm, Wind Powering America Rural Economic Development, Case Study (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-06-01

    This case study summarizes the economic development benefits of the Mars Hill Wind Farm to the community of Mars Hill, Maine. The Mars Hill Wind Farm is New England's first utility-scale wind farm.

  15. Science & Discovery | ORNL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Advanced Materials Clean Energy National Security Neutron Science Nuclear Science Supercomputing and Computation More Science Hubs, Centers and Institutes US ITER Mars 'Curiosity'...

  16. An Independent Assessment of the Technical Feasibility of the Mars One Mission Plan

    E-Print Network [OSTI]

    Do, Sydney

    In mid-2012, the Mars One program was announced, aiming to build the first human settlement on the surface of Mars. Following a series of precursor missions to develop and deploy key technologies, the first crewed mission ...

  17. The Asymmetric TimeVariable Rings of Mars Douglas P. Hamilton

    E-Print Network [OSTI]

    Hamilton, Douglas P.

    from along Mars' vernal equinox (the intersection between Mars' orbital and equatorial planes­fated Phobos­2 mission, noted that strong solar wind disturbances in the plasma and magnetic fields

  18. Preservation of Martian Organic and Environmental Records: Final Report of the Mars Biosignature Working Group

    E-Print Network [OSTI]

    Summons, Roger Everett

    The Mars Science Laboratory (MSL) has an instrument package capable of making measurements of past and present environmental conditions. The data generated may tell us if Mars is, or ever was, able to support life. However, ...

  19. Engine placement for manned descent at Mars considering single engine failures

    E-Print Network [OSTI]

    York, Stephen P. (Stephen Patrick)

    2006-01-01

    Previous missions to Mars have landed masses of approximately I metric ton on the surface. Vehicles large enough to support humans on the flight to Mars and land them safely on the surface are closer to 100 metric tons, a ...

  20. Amino acid biosignatures : implications for the detection of extinct or extant microbial communities on Mars

    E-Print Network [OSTI]

    Aubrey, Andrew D.

    2008-01-01

    colonization in impact- generated hydrothermal sulphate deposits, Haughton impact structure, and implications for sulphates on Mars.colonization in impact- generated hydrothermal sulphate deposits, Haughton impact structure, and implications for sulphates on Mars.

  1. Amino Acid Biosignatures - Implications for the Detection of Extinct or Extant Microbial Communities on Mars

    E-Print Network [OSTI]

    Aubrey, Andrew D

    2008-01-01

    colonization in impact- generated hydrothermal sulphate deposits, Haughton impact structure, and implications for sulphates on Mars.colonization in impact- generated hydrothermal sulphate deposits, Haughton impact structure, and implications for sulphates on Mars.

  2. North polar stratigraphy and the paleo-erg of Mars Shane Byrne and Bruce C. Murray

    E-Print Network [OSTI]

    Byrne, Shane

    North polar stratigraphy and the paleo-erg of Mars Shane Byrne and Bruce C. Murray Division: Surface materials and properties; KEYWORDS: Mars, polar, geology, history, stratigraphy, dune 1

  3. Space weather effects on the Mars ionosphere due to solar flares and meteors

    E-Print Network [OSTI]

    Withers, Paul

    Space weather effects on the Mars ionosphere due to solar flares and meteors P. Withers (1), M observed two aspects of space weather at Mars. Following solar flares of both moderate to strong magnitude

  4. Gone with the Wind ON_Mars (GOWON): A Wind-Driven Networked System of Mobile Sensors on Mars

    E-Print Network [OSTI]

    Davoodi, Faranak; Murphy, Neil; Mischna, Michael; Nesnas, Issa; Nikzad, Shouleh

    2012-01-01

    We propose a revolutionary way of studying the surface of Mars using a wind-driven network of mobile sensors- Gone with the Wind ON_Mars (GOWON). GOWON is a scalable architecture that will allow in-situ mapping of a wide range of phenomena, exploiting existing capabilities, but radically improving our ability to study Mars. GOWON has the following characteristics: 1.it consists of a dynamic wireless network of many compact mobile sensors. 2.the mobile sensors (called moballs) are spherically-shaped and wind-driven; they are lightweight and bouncy. 3. moballs communicate with each other and earth through a satellite system orbiting Mars. There is also peer-to-peer communication between the moballs, creating a network of shared data, computing, and tasks. Motivation and Rationale Thanks to earlier exploration missions to Mars we now have a much better understanding of many of the natural characteristics of the red planet. We now know that there is an abundance of wind (with average speeds of 10 m/s and much hig...

  5. Chemical study of secondary metabolites from selected strains of the actinomycete clade MAR 4

    E-Print Network [OSTI]

    Espindola, Ana Paula Domingues de Mello

    2008-01-01

    pathways present in all member of the group makes the MAR 4 group unusual among both marine and terrestrial

  6. Mirror Advanced Reactor Study (MARS): executive summary and overview

    SciTech Connect (OSTI)

    Logan, B.G.; Perkins, L.J.; Gordon, J.D.

    1984-07-01

    Two self-consistent MARS configurations are discussed - a 1200-MWe commercial electricity-generating plant and a synguels-generating plant that produces hydrogen with an energy equivalent to 26,000 barrels of oil per day. The MARS machine emphasizes the attractive features of the tandem mirror concept, including steady-state operation, a small-diameter high-beta plasma, a linear central cell with simple low-maintenance blankets, low first-wall heat fluxes (<10 W/cm/sup 2/), no driven plasma currents or associated disruptions, natural halo impurity diversion, and direct conversion of end-loss charged-particle power. The MARS electric plant produces 2600 MW of fusion power in a 130-m-long central cell. Advanced tandem-mirror plasma-engineering concepts, a high-efficiency liquid lithium-lead (Li/sub 17/Pb/sub 83/) blanket, and efficient direct electrical conversion of end loss power combine to produce a high net plant efficiency of 36%. With a total capital cost of $2.9 billion (constant 1983 dollars), the MARS electric plant produces busbar electricity at approx. 7 cents/kW-hour. The MARS synfuels plant produces 3500 MW of fusion power in a 150-m-long central cell. A helium-gas-cooled silicon carbide pebble-bed blanket provides high-temperature (1000/sup 0/C) heat to a thermochemical water-splitting cycle and the resulting hydrogen is catalytically converted to methanol for distribution. With a total capital cost of $3.6 billion (constant 1983 dollars), the synfuels plant produces methanol fuel at about $1.7/gal. The major features of the MARS reactor include sloshing-ion thermal barrier plugs for efficient plasma confinement, a high efficiency blanket, high-field (24-T) choke cells, drift pumping for trapped plasma species, quasi-optical electron-cyclotron resonant heating (ECRH) systems, and a component gridless direct converter.

  7. Mars Science Laboratory on Saturday, Los Alamos National Laboratory researchers

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousandReport)PriceHistoricEnergyApril 25,4MarioMarkMarsMars

  8. Thursday, March 26, 2009 POSTER SESSION II: MARS: DUNES, DUST, AND WIND

    E-Print Network [OSTI]

    Rathbun, Julie A.

    mainly from the experimental work are presented. Segura T. L. Colaprete A. Global Modeling of Impact-induced Greenhouse Warming on Early Mars [#1056] We have modeled the climate effects of impacts on early Mars. Aeolian Dunes as Ground Truth for GCM and Mesoscale Modeling on Mars [#1212] Aeolian dunes preserve

  9. Assessment of architectural options for surface power generation and energy storage on human Mars missions

    E-Print Network [OSTI]

    de Weck, Olivier L.

    Assessment of architectural options for surface power generation and energy storage on human Mars power Nuclear Solar power Architectures a b s t r a c t The provision of power for human Mars surface analysis of surface power generation and energy storage architectures for human Mars surface missions

  10. Localized gravity/topography admittance and correlation spectra on Mars: Implications for

    E-Print Network [OSTI]

    Simons, Mark

    Localized gravity/topography admittance and correlation spectra on Mars: Implications for regional] From gravity and topography data collected by the Mars Global Surveyor spacecraft we calculate gravity/topography of an elastic/plastic shell. In regions of high topography on Mars (e.g., the Tharsis rise and associated shield

  11. 23 mars 2015CNRS I INSIS I Muriel Ilous La communication

    E-Print Network [OSTI]

    van Tiggelen, Bart

    23 mars 2015CNRS I INSIS I Muriel Ilous La communication à l'INSIS 1 #12;23 mars 2015CNRS I INSIS I Muriel Ilous Muriel Ilous, responsable communication Valérie Pierre, chargée de la communication workshops 2 Le service communication de l'INSIS #12;23 mars 2015CNRS I INSIS I Muriel Ilous La Direction de

  12. TTF/VUV-FEL meeting, 21. Mar 06 SaseFelPhotonDiagnostics

    E-Print Network [OSTI]

    TTF/VUV-FEL meeting, 21. Mar 06 SaseFelPhotonDiagnostics Gas Monitor Detector Electronics from charged particles to digital value Fini Jastrow, TTF/VUV-FEL meeting, 21. Mar 06 #12;TTF/VUV-FEL meeting, 21. Mar 06 SaseFelPhotonDiagnostics The Detector Ion Current Measurement Electron Pulse Measurement

  13. Surface runoff features on Mars: Testing the carbon dioxide formation hypothesis

    E-Print Network [OSTI]

    Nimmo, Francis

    materials and properties; KEYWORDS: Mars, gullies, seepage, runoff, carbon dioxide, water Citation: StewartSurface runoff features on Mars: Testing the carbon dioxide formation hypothesis Sarah T. Stewart1, S. T., and F. Nimmo, Surface runoff features on Mars: Testing the carbon dioxide formation

  14. Results from the Mars Phoenix Lander Robotic Arm experiment R. E. Arvidson,1

    E-Print Network [OSTI]

    Volpe, Richard

    Results from the Mars Phoenix Lander Robotic Arm experiment R. E. Arvidson,1 R. G. Bonitz,2 M. L; revised 8 June 2009; accepted 24 June 2009; published 2 October 2009. [1] The Mars Phoenix Lander. (2009), Results from the Mars Phoenix Lander Robotic Arm experiment, J. Geophys. Res., 114, E00E02, doi

  15. The MECA Wet Chemistry Laboratory on the 2007 Phoenix Mars Scout Lander

    E-Print Network [OSTI]

    Kounaves, Samuel P.

    The MECA Wet Chemistry Laboratory on the 2007 Phoenix Mars Scout Lander Samuel P. Kounaves,1] To analyze and interpret the chemical record, the 2007 Phoenix Mars Lander includes four wet chemistry cells on the 2007 Phoenix Mars Scout Lander, J. Geophys. Res., 114, E00A19, doi:10.1029/2008JE003084. 1

  16. Localized precipitation and runoff on Mars Edwin S. Kite,1,2

    E-Print Network [OSTI]

    Localized precipitation and runoff on Mars Edwin S. Kite,1,2 Timothy I. Michaels,3 Scot Rafkin,3) to simulate lake storms on Mars, finding that intense localized precipitation will occur for lake size 103 km2 on Mars involve continuous precipitation, and their vertical velocities and plume heights exceed those

  17. Resolving the great drying of Mars: sequence stra7graphy of Aeolis Dorsa

    E-Print Network [OSTI]

    Edwin Kite (Caltech), Antoine Lucas (Caltech, Paris VII), Oded Aharonson is a 105 km2 low-la7tude sedimentary-rock basin, ~10°E of MSL rover - more river. in Miall, "Sedimentary Basins of the world. 5: North America," 2008 Cause

  18. Mars, the Moon, and the Ends of the Earth: Autonomy for Small Reactor Power Systems

    SciTech Connect (OSTI)

    Wood, Richard Thomas [ORNL

    2008-01-01

    In recent years, the National Aeronautics and Space Administration (NASA) has been considering deep space missions that utilize a small-reactor power system (SRPS) to provide energy for propulsion and spacecraft power. Additionally, application of SRPS modules as a planetary power source is being investigated to enable a continuous human presence for nonpolar lunar sites and on Mars. A SRPS can supply high-sustained power for space and surface applications that is both reliable and mass efficient. The use of small nuclear reactors for deep space or planetary missions presents some unique challenges regarding the operations and control of the power system. Current-generation terrestrial nuclear reactors employ varying degrees of human control and decision-making for operations and benefit from periodic human interaction for maintenance. In contrast, the control system of a SRPS employed for deep space missions must be able to accommodate unattended operations due to communications delays and periods of planetary occlusion while adapting to evolving or degraded conditions with no opportunity for repair or refurbishment. While surface power systems for planetary outposts face less extreme delays and periods of isolation and may benefit from limited maintenance capabilities, considerations such as human safety, resource limitations and usage priorities, and economics favor minimizing direct, continuous human interaction with the SRPS for online, dedicated power system management. Thus, a SRPS control system for space or planetary missions must provide capabilities for operational autonomy. For terrestrial reactors, large-scale power plants remain the preferred near-term option for nuclear power generation. However, the desire to reduce reliance on carbon-emitting power sources in developing countries may lead to increased consideration of SRPS modules for local power generation in remote regions that are characterized by emerging, less established infrastructures. Additionally, many Generation IV (Gen IV) reactor concepts have goals for optimizing investment recovery and economic efficiency that promote significant reductions in plant operations and maintenance staff over current-generation nuclear power plants. To accomplish these Gen IV goals and also address the SRPS remote-siting challenges, higher levels of automation, fault tolerance, and advanced diagnostic capabilities are needed to provide nearly autonomous operations with anticipatory maintenance. Essentially, the SRPS control system for several anticipated terrestrial applications can benefit from the kind of operational autonomy that is necessary for deep space and planetary SRPS-enabled missions. Investigation of the state of the technology for autonomous control confirmed that control systems with varying levels of autonomy have been employed in robotic, transportation, spacecraft, and manufacturing applications. As an example, NASA has pursued autonomy for spacecraft and surface exploration vehicles (e.g., rovers) to reduce mission costs, increase efficiency for communications between ground control and the vehicle, and enable independent operation of the vehicle during times of communications blackout. However, autonomous control has not been implemented for an operating terrestrial nuclear power plant nor has there been any experience beyond automating simple control loops for space reactors. Current automated control technologies for nuclear power plants are reasonably mature, and fully automated control of normal SRPS operations is clearly feasible. However, the space-based and remote terrestrial applications of SRPS modules require autonomous capabilities that can accommodate nonoptimum operations when degradation, failure, and other off-normal events challenge the performance of the reactor while immediate human intervention is not possible. The independent action provided by autonomous control, which is distinct from the more limited self action of automated control, can satisfy these conditions. Key characteristics that distinguish autonomous control i

  19. Voyage de presse 26 et 27 mars 2015 -Lyon

    E-Print Network [OSTI]

    van Tiggelen, Bart

    Voyage de presse 26 et 27 mars 2015 - Lyon DOSSIER DE PRESSE Année internationale de la lumière nanotechnologies de Lyon 5 > Nanophotonique > Photovoltaïque Photosynthèse, micro-algues et biocarburants 9 L'Institut de recherches sur la catalyse et l'environnement de Lyon 10 > Photochimie atmosphérique L

  20. Wednesday, March 14, 2007 MARS TECTONICS AND CRUSTAL DICHOTOMY

    E-Print Network [OSTI]

    Rathbun, Julie A.

    . * Murray J. B. van Wyk de Vries B. Troll V. R. Flank Terrace Architecture of Martian Shield Volcanoes and regional stresses can influence terrace architecture. 10:00 a.m. Searls M. L. * Phillips R. J. Tectonics of Utopia Basin, Mars: Results from Finite Element Loading Models [#1965] We use a finite element model

  1. Periodic bedrock ridges on Mars David R. Montgomery,1

    E-Print Network [OSTI]

    Montgomery, David R.

    Periodic bedrock ridges on Mars David R. Montgomery,1 Joshua L. Bandfield,1 and Scott K. Becker1 to be widespread [Carr, 1981; Greeley et al., 1992; Malin and Edgett, 2001]. Although wind-streamlined yardangs interpreted as sedimentary forms [McCauley et al., 1972; Cutts and Smith, 1973; Carr, 1981; Greeley et al

  2. NASA/TP--2006214196 Haughton-Mars Project Expedition 2005

    E-Print Network [OSTI]

    de Weck, Olivier L.

    NASA/TP--2006­214196 Haughton-Mars Project Expedition 2005 Final Report Prof. Olivier de Weck: Press F1 key (Windows) or Help key (Mac) for help January 2006 #12;NASA STI Program ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA

  3. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Sponaugle, Su

    of 28.5°C) or the interference of mesoscale advection processes. When 4 cohorts that settled during the passage of mesoscale eddies were omitted from the analysis, 61% of the varia- tion in recruitment due to mesoscale oceanographic circulation. Photos: Evan D'Alessandro OPENPEN ACCESSCCESS #12;Mar Ecol

  4. Mar./Apr. 2002 Winter Losses, Again Organic Beekeeping Conf.

    E-Print Network [OSTI]

    Ishida, Yuko

    Mar./Apr. 2002 Winter Losses, Again Organic Beekeeping Conf. Diagnosing and Treating Nosema is extremely hard to see, because the bees look OK while the stored food reserves in their bodies just aren of the honey bee midgut stimulate germination. The organism penetrates a midgut cell and grows by absorbing

  5. The Mars Microphone: Ready to Go by Greg Delory

    E-Print Network [OSTI]

    California at Berkeley, University of

    and David Juergens of the Jet Propulsion Laboratory, who proposed to the Planetary Society that a sound mass, power, volume, or data­rate adjustments on the lander. Friedman and Society President Carl Sagan Sciences Laboratory. Are There Sounds on Mars? Given that sound waves need an atmospheric medium through

  6. The Mars Microphone: Ready to Go by Greg Delory

    E-Print Network [OSTI]

    California at Berkeley, University of

    and David Juergens of the Jet Propulsion Laboratory, who proposed to the Planetary Society that a sound mass, power, volume, or data-rate adjustments on the lander. Friedman and Society President Carl Sagan Sciences Laboratory. Are There Sounds on Mars? Given that sound waves need an atmospheric medium through

  7. Friday, March 27, 2009 MARS: DUNES, DUST, AND WIND

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Friday, March 27, 2009 MARS: DUNES, DUST, AND WIND 8:30 a.m. Waterway Ballroom 1 Chairs: Lori Fenton Steve Metzger 8:30 a.m. Chojnacki M. * Moersch J. E. Valles Marineris Dune Fields: Thermophysical Properties, Morphology, and Provenance [#2486] We examined 25 dune fields in Valles Marineris to identify

  8. DU 27 AU 29 MARS SYMPOSIUM Innovation for the management

    E-Print Network [OSTI]

    Jeanjean, Louis

    DU 27 AU 29 MARS SYMPOSIUM Innovation for the management of echinococcosis-2014 (ImE-2014) Nouveaux hospitalier universitaire de Besançon) ; Centre national de référence échinococcose alvéolaire, Centre hospitalier régional universitaire de Besançon LIEU Chambre de commerce et d'industrie du Doubs, 46 avenue

  9. VOL. 35, NO. 1 SOUTHWESTERN ENTOMOLOGIST MAR. 2009 SCIENTIFIC NOTE

    E-Print Network [OSTI]

    Tomberlin, Jeff

    VOL. 35, NO. 1 SOUTHWESTERN ENTOMOLOGIST MAR. 2009 SCIENTIFIC NOTE Observations on the Oriental and is restricted to the southern U.S. We observed the arrival and colonization of blow flies on a decaying domestic to colonize decomposing remains in the U.S. (Byrd and Butler 1996). The first flies attracted to the chickens

  10. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Koehl, Mimi

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 479: 47­62, 2013 doi: 10.3354/meps10193 larvae, which are trans- ported by ambient currents and colonize new sur- faces. The recruitment. 1994, Schiel 2004, Edwards & Stachowicz 2011). To colonize a surface, a larva must be transported

  11. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Pawlik, Joseph

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 224: 103­114, 2001 Published December 19 process: solitary larvae first colonize a suitable but previously uninhabited sub- stratum; gregarious the conditions under which larvae of a gregarious species colonize new habitats. We first confirmed

  12. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Pawlik, Joseph

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 224: 115­131, 2001 Published December 19 substrata. Previous investigations with barnacles and polychaetes have suggested that the colonization for the initiation of monospecific aggregations of fouling marine invertebrates. KEY WORDS: Colonization · Gregarious

  13. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Pawlik, Joseph

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Published November 2 Defenses of Caribbean sponges.Pawlik* Biological Sciences and Center for Marine Science Research. University of North Carolina at Wilmington. Analyses of ash content, tensile strength, protein, carbohydrate, and lipid content, and total energy

  14. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 382: 211­219, 2009 doi: 10.3354/meps07997 Published April 30 INTRODUCTION Seabirds play critical roles in the transfer of energy and nutrients within marine ecosystems and also between marine and terrestrial ecosystems. Despite decades of intensive study

  15. Radio tracking of Phoenix during its landing on Mars

    E-Print Network [OSTI]

    Withers, Paul

    Radio tracking of Phoenix during its landing on Mars Paul Withers Center for Space Physics, Boston University (withers@bu.edu) MEX/VEX Radio Science Meeting 2010.03.18-19 Bonn, Germany #12;Phoenix atmospheric for a-aero using known quantities Re-arrange: #12;Next steps · Find f(t) for Phoenix direct

  16. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Thomas, David D.

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 311: 273­283, 2006 Published April 13 scales in biodiversity-based research: challenges and solutions for marine systems Shahid Naeem York, New York 10027, USA ABSTRACT: As in terrestrial biodiversity, human influences over marine

  17. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Queensland, University of

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 295: 201­213, 2005 Published June 23 INTRODUCTION Due to the ongoing direct depletion of the world's marine resources as well as the indirect effects of fish- ing, no-take marine reserves are being promoted as an ecosystem-level management tool. No

  18. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Camassa, Roberto

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 487: 185­200, 2013 doi: 10.3354/meps10387 Published July 30 INTRODUCTION Marine snow plays a critical role in the marine car- bon cycle, as a dominant, Kiørboe 2011). Knowledge of the vertical distribution of marine aggregates in the water column, as well

  19. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Morel, François M. M.

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 236: 37­43, 2002 Published July 3 the CO2 responses of marine phytoplankton despite the established importance of these organisms poten- tially limit the growth of large marine diatoms (Riebe- sell et al. 1993), while recent field

  20. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Rolán-Alvarez, Emilio

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 357: 175­184, 2008 doi: 10.3354/meps07278 will affect only some regions of the genome. An additional difficulty in the marine environment variation in the marine environment remains insufficiently understood (Avise 2004). Natural populations

  1. MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser

    E-Print Network [OSTI]

    Queensland, University of

    MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 253: 25­38, 2003 Published May 15 INTRODUCTION Marine protected areas are riding the wave of ocean governance reform (Kelleher 1997, Allison et component for the ecologically sustainable use of marine resources. Where such reform processes are grounded

  2. LOCALIZED PRECIPITATION, LAKE-EFFECT STORMS, AND EROSION ON MARS.

    E-Print Network [OSTI]

    LOCALIZED PRECIPITATION, LAKE-EFFECT STORMS, AND EROSION ON MARS. Edwin. S. Kite*, Earth], this hypothesis has never been modeled. We report numerical tests of localized precipitation using MRAMS ephemeral lakes. For a given vapor injection rate or lake surface temperature, localized precipitation

  3. MAR flow mapping of Analytical Chemistry Operations (Preliminary Report)

    SciTech Connect (OSTI)

    Barr, Mary E. [Los Alamos National Laboratory; Farish, Thomas J. [Los Alamos National Laboratory

    2012-06-13

    The recently released Supplemental Directive, NA-1 SD 1027, updates the radionuclide threshold values in DOE-STD-1027-92 CN1 to reflect the use of modern parameters for dose conversion factors and breathing rates. The directive also corrects several arithmetic errors within the original standard. The result is a roughly four-fold increase in the amount of weapons-grade nuclear material allowed within a designated radiological facility. Radiological laboratory space within the recently constructed Radiological Laboratory Office and Utility Building (RLUOB) is slated to house selected analytical chemistry support activities in addition to small-scale actinide R&D activities. RLUOB is within the same facility operations envelope as TA-55. Consolidation of analytical chemistry activities to RLUOB and PF-4 offers operational efficiency improvements relative to the current pre-CMRR plans of dividing these activities between RLUOB, PF-4, and CMR. RLUOB is considered a Radiological Facility under STD-1027 - 'Facilities that do not meet or exceed Category 3 threshold criteria but still possess some amount of radioactive material may be considered Radiological Facilities.' The supplemental directive essentially increases the allowable material-at-risk (MAR) within radiological facilities from 8.4 g to 38.6 g for {sup 239}Pu. This increase in allowable MAR provides a unique opportunity to establish additional analytical chemistry support functions in RLUOB without negatively impacting either R&D activities or facility operations. Individual radiological facilities are tasked to determine MAR limits (up to the Category 3 thresholds) appropriate to their operational conditions. This study presents parameters that impact establishing MAR limits for RLUOB and an assessment of how various analytical chemistry support functions could operate within the established MAR limits.

  4. Powering Curiosity: Multi-Mission Radioisotope Thermoelectric...

    Office of Environmental Management (EM)

    of power is the radioisotope thermoelectric generator (RTG) - essentially a nuclear battery that reliably converts heat into electricity. The Department of Energy and NASA...

  5. Chemist Transformed by Curiosity | GE Global Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D BGene NetworkNuclear SecurityChattan oogaMaking Magic-like

  6. Nurturing young children's curiosity about the universe

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shinesSolarNewsusceptometer under pressureNavyNumerical simulations ofstudies

  7. Piloted Mars mission planning: NEP technology and power levels

    SciTech Connect (OSTI)

    George, J.A.; Hack, K.J.; Dudzinski, L.A.; Gefert, L.P. (NASA Lewis Research Center, 21000 Brookpark Rd., M.S. AAC-2, Cleveland, Ohio 44135 (United States)); Gilland, J.H. (Sverdrup Technology, Inc., NASA Lewis Research Center, 21000 Brookpark Rd., M.S. AAC-2, Cleveland, Ohio 44135 (United States))

    1993-01-10

    This paper examines the strong interrelationship between assumed technology and mission performance requirements for NEP. Recent systems analysis efforts by NASA, DOE, and various contractors are used to project achievable system performance as a function of technological sophistication for two piloted Mars mission applications. Specific mass regimes for each collection of technologies are presented as a function of power level for piloted applications. Low thrust mission analyses are presented which relate these system performance projections to achievable mission performance. Mission performance maps'' are constructed which link prime mission figures-of-merit of time and initial mass with system requirements on power level and specific mass, and hence technology. Both opposition and conjunction class piloted Mars missions are presented for the 2016 opportunity, analogous to those proposed in the 90-Day Study'' and Synthesis'' architecture studies. Mass and time breakdowns are presented for 10 MWe piloted and 5 MWe cargo point designs.

  8. Reducing the risk to Mars: The gas core nuclear rocket

    SciTech Connect (OSTI)

    Howe, S.D.; DeVolder, B.; Thode, L.; Zerkle, D.

    1998-12-31

    The next giant leap for mankind will be the human exploration of Mars. Almost certainly within the next thirty years, a human crew will brave the isolation, the radiation, and the lack of gravity to walk on and explore the Red planet. However, because the mission distances and duration will be hundreds of times greater than the lunar missions, a human crew will face much greater obstacles and a higher risk than those experienced during the Apollo program. A single solution to many of these obstacles is to dramatically decrease the mission duration by developing a high performance propulsion system. The gas-core nuclear rocket (GCNR) has the potential to be such a system. The authors have completed a comparative study of the potential impact that a GCNR could have on a manned Mars mission. The total IMLEO, transit times, and accumulated radiation dose to the crew will be compared with the NASA Design Reference Missions.

  9. Nuclear Design of the HOMER-15 Mars Surface Fission Reactor

    SciTech Connect (OSTI)

    Poston, David I.

    2002-07-01

    The next generation of robotic missions to Mars will most likely require robust power sources in the range of 3 to 20 kWe. Fission systems are well suited to provide safe, reliable, and economic power within this range. The goal of this study is to design a compact, low-mass fission system that meets Mars surface power requirements, while maintaining a high level of safety and reliability at a relatively low cost. The Heat pipe Power System (HPS) is one possible approach for producing near-term, low-cost, space fission power. The goal of the HPS project is to devise an attractive space fission system that can be developed quickly and affordably. The primary ways of doing this are by using existing technology and by designing the system for inexpensive testing. If the system can be designed to allow highly prototypic testing with electrical heating, then an exhaustive test program can be carried out quickly and inexpensively, and thorough testing of the actual flight unit can be performed - which is a major benefit to reliability. Over the past 4 years, three small HPS proof-of-concept technology demonstrations have been conducted, and each has been highly successful. The Heat pipe-Operated Mars Exploration Reactor (HOMER) is a derivative of the HPS designed especially for producing power on the surface of Mars. The HOMER-15 is a 15-kWt reactor that couples with a 3-kWe Stirling engine power system. The reactor contains stainless-steel (SS)-clad uranium nitride (UN) fuel pins that are structurally and thermally bonded to SS/sodium heat pipes. Fission energy is conducted from the fuel pins to the heat pipes, which then carry the heat to the Stirling engine. This paper describes conceptual design and nuclear performance the HOMER-15 reactor. (author)

  10. DEVELOPMENT AND DEPLOYMENT OF THE MOBILE ARM RETRIEVAL SYSTEM (MARS) - 12187

    SciTech Connect (OSTI)

    BURKE CA; LANDON MR; HANSON CE

    2011-11-08

    Washington River Protection Solutions (WRPS) is developing and deploying Mobile Arm Retrieval System (MARS) technologies solutions to support retrieval of radioactive and chemical waste from underground single shell storage tanks (SST) located at the Hanford Site, which is near Richland, Washington. WRPS has developed the MARS using a standardized platform that is capable of deploying multiple retrieval technologies. To date, WRPS, working with their mentor-protege company, Columbia Energy and Environmental Services (CEES), has developed two retrieval mechanisms, MARS-Sluicing (MARS-S) and MARS-Vacuum (MARS-V). MARS-S uses pressurized fluids routed through spray nozzles to mobilize waste materials to a centrally located slurry pump (deployed in 2011). MARS-V uses pressurized fluids routed through an eductor nozzle. The eductor nozzle allows a vacuum to be drawn on the waste materials. The vacuum allows the waste materials to be moved to an in-tank vessel, then extracted from the SST and subsequently pumped to newer and safer double shell tanks (DST) for storage until the waste is treated for disposal. The MARS-S system is targeted for sound SSTs (i.e., non leaking tanks). The MARS-V is targeted for assumed leaking tanks or those tanks that are of questionable integrity. Both versions of MARS are beinglhave been developed in compliance with WRPS's TFC-PLN-90, Technology Development Management Plan [1]. TFC-PLN-90 includes a phased approach to design, testing, and ultimate deployment of new technologies. The MARS-V is scheduled to be deployed in tank 241-C-105 in late 2012.

  11. DEVELOPMENT AND DEPLOYMENT OF THE MOBILE ARM RETRIEVAL SYSTEM (MARS) - 12187

    SciTech Connect (OSTI)

    BURKE CA; LANDON MR; HANSON CE

    2012-01-30

    Washington River Protection Solutions (WRPS) is developing and deploying Mobile Arm Retrieval System (MARS) technologies solutions to support retrieval of radioactive and chemical waste from underground single shell storage tanks (SST) located at the Hanford Site, which is near Richland, Washington. WRPS has developed the MARS using a standardized platform that is capable of deploying multiple retrieval technologies. To date, WRPS, working with their mentor-protege company, Columbia Energy and Environmental Services (CEES), has developed two retrieval mechanisms, MARS-Sluicing (MARS-S) and MARS-Vacuum (MARS-V). MARS-S uses pressurized fluids routed through spray nozzles to mobilize waste materials to a centrally located slurry pump (deployed in 2011). MARS-V uses pressurized fluids routed through an eductor nozzle. The eductor nozzle allows a vacuum to be drawn on the waste materials. The vacuum allows the waste materials to be moved to an in-tank vessel, then extracted from the SST and subsequently pumped to newer and safer double shell tanks (DST) for storage until the waste is treated for disposal. The MARS-S system is targeted for sound SSTs (i.e., non leaking tanks). The MARS-V is targeted for assumed leaking tanks or those tanks that are of questionable integrity. Both versions of MARS are being/have been developed in compliance with WRPS's TFC-PLN-90, Technology Development Management Plan. TFC-PLN-90 includes a phased approach to design, testing, and ultimate deployment of new technologies. The MARS-V is scheduled to be deployed in tank 241-C-105 in late 2012.

  12. Development and Deployment of the Mobile Arm Retrieval System (MARS) - 12187

    SciTech Connect (OSTI)

    Burke, Christopher A.; Landon, Matthew R. [Washington River Protection Solutions, Richland, Washington 99352 (United States); Hanson, Carl E. [AREVA Federal Services, Richland, Washington 99352 (United States)

    2012-07-01

    Washington River Protection Solutions (WRPS) is developing and deploying Mobile Arm Retrieval System (MARS) technologies solutions to support retrieval of radioactive and chemical waste from underground single shell storage tanks (SST) located at the Hanford Site, which is near Richland, Washington. WRPS has developed the MARS using a standardized platform that is capable of deploying multiple retrieval technologies. To date, WRPS, working with their mentor-protege company, Columbia Energy and Environmental Services (CEES), has developed two retrieval mechanisms, MARS-Sluicing (MARS-S) and MARS-Vacuum (MARS-V). MARS-S uses pressurized fluids routed through spray nozzles to mobilize waste materials to a centrally located slurry pump (deployed in 2011). MARS-V uses pressurized fluids routed through an eductor nozzle. The eductor nozzle allows a vacuum to be drawn on the waste materials. The vacuum allows the waste materials to be moved to an in-tank vessel, then extracted from the SST and subsequently pumped to newer and safer double shell tanks (DST) for storage until the waste is treated for disposal. The MARS-S system is targeted for sound SSTs (i.e., non leaking tanks). The MARS-V is targeted for assumed leaking tanks or those tanks that are of questionable integrity. Both versions of MARS are being/have been developed in compliance with WRPS's TFC-PLN-90, Technology Development Management Plan [1]. TFC-PLN-90 includes a phased approach to design, testing, and ultimate deployment of new technologies. The MARS-V is scheduled to be deployed in tank 241-C-105 in late 2012. (authors)

  13. Fluid Core Size of Mars from Detection of the Solar Tide

    E-Print Network [OSTI]

    Manga, Michael

    Lovenumber,hasbeen obtained from an analysis of Mars Global Surveyor radio tracking. The observed k2 of 0.153 0.017 is large) tracking data, Smith et al. (5, 6) reported a solution for the tidal Love number k2 of 0.055 0.008, which deformation of the figure of Mars by the gravitational pull of the Sun and hence a less rigid Mars (7). We

  14. Analysis of organic molecules using the Mars Organic Analyzer, a portable, automated microfabricated capillary electrophoresis instrument

    E-Print Network [OSTI]

    Stockton, Amanda Michelle

    2010-01-01

    utilizes subcritical water extraction and the Mars Organiceither by subcritical water extraction 115 or by sublimationwater. Subcritical Water Extraction / Reaction Protocol. A

  15. HYDROGEN PEROXIDE DETECTED ON MARS IAU Circular 8254 9 December 2003

    E-Print Network [OSTI]

    Atreya, Sushil

    HYDROGEN PEROXIDE DETECTED ON MARS IAU Circular 8254 9 December 2003 Central Bureau. Wong, University of Michigan, report: "On June 20, we made an unambiguous detection of hydrogen

  16. Space weather effects on the Mars ionosphere due to solar flares and

    E-Print Network [OSTI]

    Withers, Paul

    Space weather effects on the Mars ionosphere due to solar flares and meteors Paul Withers1, Michael in the ionospheric response to these aspects of space weather. #12;

  17. Mar/Apr 2013 Subscription Information SuperBoost Heat Exhaustion

    E-Print Network [OSTI]

    Ishida, Yuko

    1 Mar/Apr 2013 of formerly strong honey bee colon- ies, and easily observable decreases in bumble bee sightings, correlated

  18. FAST ONBOARD TEXTURE ANALYSIS FOR PLANETARY EXPLORATION David R. Thompson1

    E-Print Network [OSTI]

    sedimentology in Mars Exploration Rover microscopic images. Here, the decision trees pro- duce image descriptors- age Texture, Mars Sedimentology. 1. INTRODUCTION Planetary science is entering a new era where onboard in a sedimentologi- cal survey of Mars Exploration Rover imagery [1]. We approximate manual particle analysis

  19. 19Bulletin Infirmier du Cancer Vol.6-n1-janvier-fvrier-mars 2006 SOR savoir patient

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    19Bulletin Infirmier du Cancer Vol.6-n°1-janvier-février-mars 2006 SOR savoir patient A fin de;20Bulletin Infirmier du Cancer Vol.6-n°1-janvier-février-mars 2006 SOR savoir patient mandations pour la

  20. New Mars exhibit at the Bradbury Science Museum

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shinesSolarNew scholarship supports returning students New LANLNewNew Mars Exhibit

  1. MHK Projects/Del Mar Landing | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos Bay OPT Wave Park <EnergyMar Landing

  2. Biagioli, Mario, Galileo's System of Patronage , History of Science, 28:1=79 (1990:Mar.) p.1 Biagioli, Mario, Galileo's System of Patronage , History of Science, 28:1=79 (1990:Mar.) p.1

    E-Print Network [OSTI]

    Biagioli, Mario, Galileo's System of Patronage , History of Science, 28:1=79 (1990:Mar.) p.1 #12;Biagioli, Mario, Galileo's System of Patronage , History of Science, 28:1=79 (1990:Mar.) p.1 #12;Biagioli, Mario, Galileo's System of Patronage , History of Science, 28:1=79 (1990:Mar.) p.1 #12;Biagioli, Mario

  3. Mars at very low obliquity: Atmospheric collapse and the fate of M. A. Kreslavsky1

    E-Print Network [OSTI]

    Head III, James William

    : Kreslavsky, M. A., and J. W. Head (2005), Mars at very low obliquity: Atmospheric collapse and the fateMars at very low obliquity: Atmospheric collapse and the fate of volatiles M. A. Kreslavsky1 and J. W. Head Department of Geological Sciences, Brown University, Providence, Rhode Island, USA Received

  4. MARS15 study of the Energy Production Demonstrator Model for Megawatt

    E-Print Network [OSTI]

    McDonald, Kirk

    MARS15 study of the Energy Production Demonstrator Model for Megawatt proton beams in the 0.5 ­ 120 Targetry Workshop HPT5, Fermilab #12;Energy Production Demonstrator MARS15 Model · Solid targets · R= 60 cm · Energy Production/Materials Testing · LAQGSM/CEM generators were usedU-nat, 3 GeV, Energy deposition, Ge

  5. Solar flux variability of Mars' exosphere densities and temperatures Jeffrey M. Forbes,1

    E-Print Network [OSTI]

    Forbes, Jeffrey

    Solar flux variability of Mars' exosphere densities and temperatures Jeffrey M. Forbes,1 Frank G, the response of Mars' exosphere to long-term solar change is established and compared to that of Earth conditions) change only 36­50% as much as those at Earth as solar activity increases from solar minimum

  6. Oceanography Vol. 19, No. 1, Mar. 200664 Hybrid ModelFOR COASTAL SIMULATIONS

    E-Print Network [OSTI]

    Fringer, Oliver B.

    Oceanography Vol. 19, No. 1, Mar. 200664 Hybrid ModelFOR COASTAL SIMULATIONS A DVA N C E S I N CO M Oceanography Vol. 19, No. 1, Mar. 200664 ThisarticlehasbeenpublishedinOceanography,Volume19,Number1,aquarterlyjournalofTheOceanographySociety.Copyright2006byTheOceanography

  7. Thursday, March 16, 2006 POSTER SESSION II: MARS SPECTROSCOPY AND REMOTE SENSING

    E-Print Network [OSTI]

    Rathbun, Julie A.

    ] Exposure of sulfates to a low pressure (0.01 Torr) carbon dioxide-rich atmosphere, and intense UVThursday, March 16, 2006 POSTER SESSION II: MARS SPECTROSCOPY AND REMOTE SENSING 7:00 p.m. Fitness of Mars [#1885] Currently, the same infrared remote sensing data sets are interpreted as pointing both

  8. A comparison of methods used to estimate the height of sand dunes on Mars

    E-Print Network [OSTI]

    Bourke, Mary C.

    A comparison of methods used to estimate the height of sand dunes on Mars M.C. Bourke a,b,, M bodies is difficult. We assess four methods that can be used to estimate the height of aeolian dunes of which were not previously available for dunes on Mars. They include dune height, width, length, surface

  9. Dunes on Mars, `Venus', Earth, and subaqueous ripples: a scaling law for their elementary size

    E-Print Network [OSTI]

    Claudin, Philippe

    Dunes on Mars, `Venus', Earth, and subaqueous ripples: a scaling law for their elementary size P@pmmh.espci.fr Dunes and bedforms are observed in considerably di- verse environments: aeolian dunes of sand as well as snow, dunes under water, but also dunes on Mars or Titan. Summarising our work published in [1], we

  10. Mars Global Digital Dune Database and initial science results Rosalyn K. Hayward,1

    E-Print Network [OSTI]

    Bourke, Mary C.

    Mars Global Digital Dune Database and initial science results Rosalyn K. Hayward,1 Kevin F. Mullins 20 November 2007. [1] A new Mars Global Digital Dune Database (MGD3 ) constructed using Thermal of the geographic distribution of moderate- to large-size dune fields (area >1 km2 ) that will help researchers

  11. Fuel-optimal Earth-Mars trajectories using low-thrust exhaust-modulated plasma propulsion 

    E-Print Network [OSTI]

    Nah, Ren Sang

    1999-01-01

    orbit about Mars within a fixed time frame. The trajectory and spacecraft parameters have been chosen to simulate the outbound leg of a planned human mission to Mars in the year of 2014. The optimizations involve both planar and three-dimensional...

  12. Yarkovsky-Driven Spreading of the Eureka Family of Mars Trojans Matija Cuk1

    E-Print Network [OSTI]

    Yarkovsky-Driven Spreading of the Eureka Family of Mars Trojans Matija ´Cuk1 , Apostolos A orbital grouping that was affected by a negative acceleration (i.e. one against the orbital motion above about 25 (Murray and Dermott, 1999). In our Solar System, only Jupiter, Neptune and Mars are known

  13. Tuesday, March 14, 2006 MARS: ANALOG STUDIES AND AEOLIAN DEPOSITION/EROSION

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Hyper-Arid Desert Analog to Mars: The Western Desert of Egypt [#2335] We are conducting transient electromagnetic and vertical electrical soundings of potential Mars analog sites to quantify the geoelectrical in the western desert of Egypt. 2:45 p.m. Quinn R. C. * Ehrenfreund P. Grunthaner F. J. Taylor C. L. Zent A. P

  14. CO2-SO2 clathrate hydrate formation on early Mars1 Eric Chassefirea,b

    E-Print Network [OSTI]

    Boyer, Edmond

    and maintained a global average surface temperature ~230 K. Because35 clathrates trap SO2 more favorably than CO2 as a possible greenhouse gas which worked together55 with CO2 to raise the surface temperature of early Mars1 CO2-SO2 clathrate hydrate formation on early Mars1 2 Eric Chassefièrea,b , Emmanuel Dartoisc

  15. The sulfur content of volcanic gases on Mars Fabrice Gaillard, a

    E-Print Network [OSTI]

    Boyer, Edmond

    The sulfur content of volcanic gases on Mars Fabrice Gaillard, a and Bruno Scaillet1, a a CNRS sulfur contents of the martian regolith and lack of detection of extensive carbonate deposits suggest that the latest geological events that shaped the landscapes of Mars were dominated by acidic waters possibly

  16. Mar Biol (2007) 150:509519 DOI 10.1007/s00227-006-0367-4

    E-Print Network [OSTI]

    2007-01-01

    Mar Biol (2007) 150:509­519 DOI 10.1007/s00227-006-0367-4 123 RESEARCH ARTICLE Phylogeography coast colonizing the Atlantic islands and the Mediterranean, promoting the evolu- tionary divergence, Avenida Astrofísico Francisco Sánchez s/n, 38206 La Laguna, Tenerife, Islas Canarias, Spain #12;510 Mar

  17. Mar Biol (2009) 156:14211432 DOI 10.1007/s00227-009-1182-5

    E-Print Network [OSTI]

    2009-01-01

    Mar Biol (2009) 156:1421­1432 DOI 10.1007/s00227-009-1182-5 123 ORIGINAL PAPER Phylogeography with a recent colonization from south- ern populations. The results showed signs of Pleistocene signatures-mail: sara_francisco@ispa.pt R. Castilho · M. Soares Centro de Ciências do Mar do Algarve, Campus de Gambelas

  18. Impact-induced hydrothermal activity on early Mars Oleg Abramov and David A. Kring

    E-Print Network [OSTI]

    Abramov, Oleg

    Impact-induced hydrothermal activity on early Mars Oleg Abramov and David A. Kring Lunar time for colonization of impact-induced hydrothermal systems by thermophilic organisms, provided they existed on early Mars. The habitable volume reaches a maximum of 6,000 km3 8,500 years after the impact

  19. Observations of atmospheric tides on Mars at the season and latitude of the Phoenix atmospheric entry

    E-Print Network [OSTI]

    Withers, Paul

    Observations of atmospheric tides on Mars at the season and latitude of the Phoenix atmospheric atmospheric entry of NASA's Phoenix Mars probe using Phoenix Atmospheric Structure Experiment (ASE) data atmospheric entry, Geophys. Res. Lett., 37, L24204, doi:10.1029/2010GL045382. 1. Introduction [2] Phoenix

  20. Wet Chemistry experiments on the 2007 Phoenix Mars Scout Lander mission: Data analysis and results

    E-Print Network [OSTI]

    Kounaves, Samuel P.

    Wet Chemistry experiments on the 2007 Phoenix Mars Scout Lander mission: Data analysis and results performed using the Wet Chemistry Laboratories on the 2007 Phoenix Mars Scout Lander. One soil sample.36(±0.3) mM, respectively. Results indicate that the leached portion of soils at the Phoenix landing site

  1. The oxidationreduction potential of aqueous soil solutions at the Mars Phoenix landing site

    E-Print Network [OSTI]

    Kounaves, Samuel P.

    The oxidationreduction potential of aqueous soil solutions at the Mars Phoenix landing site Richard; revised 2 June 2011; accepted 3 June 2011; published 23 July 2011. [1] Results from the Mars Phoenix) of the Phoenix WCL Rosy Red sample soil solution. The measured Eh of the Rosy Red sample in the WCL aqueous test

  2. Dielectric signatures of adsorbed and salty liquid water at the Phoenix landing site, Mars

    E-Print Network [OSTI]

    Stillman, David E.

    Dielectric signatures of adsorbed and salty liquid water at the Phoenix landing site, Mars David E was measured by the Thermal and Electrical Conductivity Probe (TECP) on the Phoenix lander. We interpret liquid water at the Phoenix landing site, Mars, J. Geophys. Res., 116, E09005, doi:10.1029/2011JE003838

  3. Multipoint observations of coronal mass ejection and solar energetic particle events on Mars

    E-Print Network [OSTI]

    California at Berkeley, University of

    coupled with the WangSheeleyArge version 1.6 potential source surface model, using Solar and HeliosphericMultipoint observations of coronal mass ejection and solar energetic particle events on Mars and evolution of interplanetary coronal mass ejections (ICMEs) throughout the heliosphere. Using Mars Global

  4. ltima actualizacin 12-06-13 Nov Dic Ene Feb Mar Abr May Jun Jul Ago Sept Oct Nov

    E-Print Network [OSTI]

    Escolano, Francisco

    /Canadeka/Chineka Energias renovables 15Mar/15Jul continuamente abierta continuamente abierta continuamente abierta 14Febr/25

  5. Mars as a comet: Solar wind interaction on a large scale

    E-Print Network [OSTI]

    Holmstrom, Mats

    2015-01-01

    Looking at the Mars-solar wind interaction on a larger spatial scale than the near Mars region, the planet can be seen as an ion source interacting with the solar wind, in many ways like a comet, but with a smaller ion source region. Here we study the interaction between Mars and the solar wind using a hybrid model (particle ions and fluid electrons). We find that the solar wind is disturbed by Mars out to 100 Mars radii downstream of the planet, and beyond. On this large scale it is clear that the escaping ions can be classified into two different populations. A polar plume of ions picked-up by the solar wind, and a more fluid outflow of ions behind the planet. The outflow increases linear with the production up to levels of observed outflow rates, then the escape levels off for higher production rates.

  6. The Phoenix Mars Lander Robotic Arm Robert Bonitz, Lori Shiraishi, Matthew Robinson, Joseph Carsten, Richard Volpe, Ashitey Trebi-Ollennu

    E-Print Network [OSTI]

    Volpe, Richard

    1 The Phoenix Mars Lander Robotic Arm Robert Bonitz, Lori Shiraishi, Matthew Robinson, Joseph,wilson,davis@honeybeerobotics.com Abstract--The Phoenix Mars Lander Robotic Arm (RA) has operated for 149 sols since the Lander touched down describes the design and operations of the RA as a critical component of the Phoenix Mars Lander necessary

  7. Unique Spectroscopy and Imaging of Mars with JWST

    E-Print Network [OSTI]

    Villanueva, Geronimo L; Clancy, Todd R; Encrenaz, Therese; Fouchet, Thierry; Hartogh, Paul; Lellouch, Emmanuel; Lopez-Valverde, Miguel A; Mumma, Michael J; Novak, Robert E; Smith, Michael D; Vandaele, Ann-Carine; Wolff, Michael J; Ferruit, Pierre; Milam, Stefanie N

    2015-01-01

    In this document, we summarize the main capabilities of the James Webb Space Telescope (JWST) for performing observations of Mars. The distinctive vantage point of JWST at the Sun-Earth Lagrange point (L2) will allow sampling the full observable disk, permitting the study of short-term phenomena, diurnal processes (across the East-West axis) and latitudinal processes between the hemispheres (including seasonal effects) with excellent spatial resolutions (0.07 arcsec at 2 {\\mu}m). Spectroscopic observations will be achievable in the 0.7-5 {\\mu}m spectral region with NIRSpec at a maximum resolving power of 2700, and with 8000 in the 1-1.25 {\\mu}m range. Imaging will be attainable with NIRCam at 4.3 {\\mu}m and with two narrow filters near 2 {\\mu}m, while the nightside will be accessible with several filters in the 0.5 to 2 {\\mu}m. Such a powerful suite of instruments will be a major asset for the exploration and characterization of Mars. Some science cases include the mapping of the water D/H ratio, investigatio...

  8. Mars mission performance enhancement with hybrid nuclear propulsion

    SciTech Connect (OSTI)

    Dagle, J.E.; Noffsinger, K.E. [Pacific Northwest Lab., Richland, WA (United States); Segna, D.R. [USDOE Richland Operations Office, WA (United States)

    1992-01-01

    Nuclear electric propulsion (NEP), compared with chemical and nuclear thermal propulsion (NTP), can effectively deliver the same mass to Mars using much less propellant, consequently requiring less mass delivered to Earth orbit. The lower thrust of NEP requires a spiral trajectory near planetary bodies, which significantly increases the travel time. Although the total travel time is long, the portion of the flight time spent during interplanetary transfer is shorter, because the vehicle is thrusting for much longer periods of time. This has led to the supposition that NEP, although very attractive for cargo missions, is not suitable for piloted missions to Mars. However, with the application of a hybrid application of a hybrid approach to propulsion, the benefits of NEP can be utilized while drastically reducing the overall travel time required. Development of a dual-mode system, which utilizes high-thrust NTP to propel the spacecraft from the planetary gravitational influence and low-thrust NEP to accelerate in interplanetary space, eliminates the spiral trajectory and results in a much faster transit time than could be obtained by either NEP or NTP alone. This results in a mission profile with a lower initial mass in low Earth orbit. In addition, the propulsion system would have the capability to provide electrical power for mission applications.

  9. Advanced hybrid nuclear propulsion Mars mission performance enhancement

    SciTech Connect (OSTI)

    Dagle, J.E.; Noffsinger, K.E.; Segna, D.R.

    1992-02-01

    Nuclear electric propulsion (NEP), compared with chemical and nuclear thermal propulsion (NTP), can effectively deliver the same mass to Mars using much less propellant, consequently requiring less mass delivered to Earth orbit. The lower thrust of NEP requires a spiral trajectory near planetary bodies, which significantly increases the travel time. Although the total travel time is long, the portion of the flight time spent during interplanetary transfer is shorter, because the vehicle is thrusting for much longer periods of time. This has led to the supposition that NEP, although very attractive for cargo missions, is not suitable for piloted missions to Mars. However, with the application of a hybrid approach to propulsion, the benefits of NEP can be utilized while drastically reducing the overall travel time required. Development of a dual-mode system, which utilizes high-thrust NTP to propel the spacecraft from the planetary gravitational influence and low-thrust NEP to accelerate in interplanetary space, eliminates the spiral trajectory and results in a much faster transit time than could be obtained by either NEP or NTP alone. This results in a mission profile with a lower initial mass in low Earth orbit. In addition, the propulsion system would have the capability to provide electrical power for mission applications.

  10. Sediment volume in the north polar sand seas of Mars

    SciTech Connect (OSTI)

    Lancaster, N.; Greeley, R. (Arizona State Univ., Tempe (USA))

    1990-07-10

    Data from studies of the cross-sectional area of terrestrial transverse dunes have been combined with maps of dune morphometry derived from Viking orbiter images to generate new estimates of sediment thickness and dune sediment volume in the north polar sand seas of Mars. A relationship between dune spacing and equivalent sediment thickness (EST) was developed from field data on Namibian and North American dunes and was applied to data on dune spacing and dune cover measured on Viking orbiter images to generate maps of dune sediment thickness for Martian north polar sand seas. There are four major sand seas in the north polar region of Mars, covering an area of 6.8 x 10{sup 5} km{sup 2}. Equivalent sediment thickness ranges between 0.5 and 6.1 m with a mean of 1.8 m. The sand seas contain a total of 1158 km{sup 3} of dune sediment, which may have been derived by erosion of polar layered deposits and concentrated in its present location by winds that change direction seasonally.

  11. Propulsive options for a manned Mars transportation system

    SciTech Connect (OSTI)

    Braun, R.D.; Blersch, D.J.

    1989-01-01

    In this investigation, five potential manned Mars transportation systems are compared. These options include: (1) a single vehicle, chemically propelled (CHEM) option, (2) a single vehicle, nuclear thermal propulsion (NTP) option, (3) a single vehicle solar electric propulsion (SEP) option, (4) a single vehicle hybrid nuclear electric propulsion (NEP)/CHEM option, and (5) a dual vehicle option (NEP cargo spacecraft and CHEM manned vehicle). In addition to utilizing the initial vehicle weight in low-earth orbit as a measure of mission feasibility, this study addresses the major technological barriers each propulsive scenario must surpass. It is shown that instead of a single clearly superior propulsion system, each means of propulsion may be favored depending upon the specified program policy and the extent of the desired manned flight time. Furthermore, the effect which aerobraking and multiple transfer cycles have upon mission feasibility is considered. 18 refs.

  12. Temporal Variability of Waves at the Proton Cyclotron Frequency Upstream from Mars: Implications for Mars Distant Hydrogen Exosphere

    E-Print Network [OSTI]

    Bertucci, Cesar; Chaufray, Jean-Yves; Gomez, Daniel; Mazelle, Christian; Delva, Magda; Modolo, Ronan; Gonzalez-Galindo, Francisco; Brain, David Andrew

    2013-01-01

    We report on the temporal variability of the occurrence of waves at the local proton cyclotron frequency upstream from the Martian bow shock from Mars Global Surveyor observations during the first aerobraking and science phasing orbit periods. Observations at high southern latitudes during minimum-to-mean solar activity show that the wave occurrence rate is significantly higher around perihelion southern summer solstice and lower around the same hemisphere's spring and autumn equinoxes. A similar trend is observed in the hydrogen (H) exospheric density profiles over the Martian South Pole obtained from a model including UV thermospheric heating effects. In spite of the complexity in the ion pick-up and plasma wave generation and evolution processes, these results support the idea that variations in the occurrence of waves could be used to study the temporal evolution of the distant Martian H corona and its coupling with the thermosphere at altitudes currently inaccessible to direct measurements.

  13. An earth image simulation and tracking system for the Mars Laser Communication Demonstration

    E-Print Network [OSTI]

    Balster, Stephanie Karen

    2005-01-01

    In this thesis I created an Earth-image simulation and investigated Earth-tracking algorithms for the Mars Laser Communication Demonstration (MLCD). The MLCD mission will demonstrate the feasibility of high-data-rate laser ...

  14. Mars in the late Noachian : evolution of a habitable surface environment

    E-Print Network [OSTI]

    Johnson, Sarah Stewart

    2008-01-01

    This dissertation addresses whether simple life forms might have existed on Mars during the late Noachian epoch, and whether those life forms, or their traces, can be detected today. It begins by analyzing the ancient ...

  15. Comparative analysis of surface power system architectures for human Mars exploration

    E-Print Network [OSTI]

    Cooper, Chase Allen

    2009-01-01

    This thesis provides a comprehensive analysis of surface power generation and energy storage architectures for human Mars surface missions, including tracking and non-tracking photovoltaic power generation, nuclear fission ...

  16. Early Mars hydrology: Meridiani playa deposits and the sedimentary record of Arabia Terra

    E-Print Network [OSTI]

    Andrews-Hanna, Jeffrey C.

    The Meridiani Planum region of Mars has been identified as a region of past aqueous activity by a combination of orbital and in situ observations that revealed evidence for sulfate-rich dirty evaporites formed in a playa ...

  17. Design of power systems for extensible surface mobility systems on the Moon and Mars

    E-Print Network [OSTI]

    Hong, SeungBum, S.M. Massachusetts Institute of Technology

    2007-01-01

    This thesis presents the power system model description and sample studies for extensible surface mobility systems on the Moon and Mars. The mathematical model of power systems for planetary vehicles was developed in order ...

  18. The Mars Gravity Biosatellite as an innovative partial gravity research platform

    E-Print Network [OSTI]

    Fulford-Jones, Thaddeus R. F

    2008-01-01

    The Mars Gravity Biosatellite is an unprecedented independent spaceflight platform for gravitational biology research. With a projected first launch after 2010, the low Earth orbit satellite will support a cohort of fifteen ...

  19. Constraining the average fill densities of Mars' lowlands and fluvial erosion of Titan's polar regions.

    E-Print Network [OSTI]

    Tewelde, Yodit

    2013-01-01

    Other than Earth, Mars and Titan are the only bodies in our Solar System where we have observed widespread fluvial activity. In this thesis I present two approaches for constraining the extent of multiple resurfacing ...

  20. MARS IN A MINUTE: What Happens When the Sun Blocks our Signal?

    E-Print Network [OSTI]

    and Mars wind up on opposite sides of the sun. Thats called "solar conjunction." It's like being on either on other work... or take a well-deserved vacation! Solar conjunction lasts just a few weeks. Then its back

  1. Wednesday, March 14, 2007 MARS SEDIMENTS AND GEOCHEMISTRY: VIEW FROM THE SURFACE

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Golombek M. Parker T. Squyres S. W. Sullivan R. Structure and Sedimentology of the Western Margin of Erebus Crater, Meridiani Planum, Mars [#2235] The structure, stratigraphy and sedimentology of two outcrops

  2. Detailed stratigraphy and bed thickness of the Mars north and south polar layered deposits

    E-Print Network [OSTI]

    Limaye, Ajay B. S.

    The Mars polar layered deposits (PLD) likely hold an extensive record of recent climate during a period of high-amplitude orbit and obliquity cycles. Previous work has detected limited evidence for orbital signatures within ...

  3. STUDIES OF DUNE CHANGE ON MARS COMBINING MOC AND HIRISE IMAGES. M. C. , A. Philippoff1

    E-Print Network [OSTI]

    Bourke, Mary C.

    STUDIES OF DUNE CHANGE ON MARS COMBINING MOC AND HIRISE IMAGES. M. C. Bourke1 , A. Philippoff1 in the circumpolar sand seas (76.2°N, 95.3°E) found that two 20 m wide dome dunes disappeared and a third reduced its volume by 15% over 3.04 Mars years [1]. Here we report on the findings of an extended dune monitoring

  4. A Flow-Channel Analysis for the Mars Hopper

    SciTech Connect (OSTI)

    W. Spencer Cooley

    2013-02-01

    The Mars Hopper is an exploratory vehicle designed to fly on Mars using carbon dioxide from the Martian atmosphere as a rocket propellant. The propellent gasses are thermally heated while traversing a radioisotope ther- mal rocket (RTR) engine’s core. This core is comprised of a radioisotope surrounded by a heat capacitive material interspersed with tubes for the propellant to travel through. These tubes, or flow channels, can be manu- factured in various cross-sectional shapes such as a special four-point star or the traditional circle. Analytical heat transfer and computational fluid dynamics (CFD) anal- yses were performed using flow channels with either a circle or a star cross- sectional shape. The nominal total inlet pressure was specified at 2,805,000 Pa; and the outlet pressure was set to 2,785,000 Pa. The CO2 inlet tem- perature was 300 K; and the channel wall was 1200 K. The steady-state CFD simulations computed the smooth-walled star shape’s outlet temper- ature to be 959 K on the finest mesh. The smooth-walled circle’s outlet temperature was 902 K. A circle with a surface roughness specification at 0.01 mm gave 946 K and at 0.1 mm yielded 989 K. The The effects of a slightly varied inlet pressure were also examined. The analytical calculations were based on the mass flow rates computed in the CFD simulations and provided significantly higher outlet temperature results while displaying the same comparison trends. Research relating to the flow channel heat transfer studies was also done. Mathematical methods to geometrically match the cross-sectional areas of the circle and star, along with a square and equilateral triangle, were derived. A Wolfram Mathematica 8 module was programmed to analyze CFD results using Richardson Extrapolation and calculate the grid convergence index (GCI). A Mathematica notebook, also composed, computes and graphs the bulk mean temperature along a flow channel’s length while the user dynam- ically provides the input variables, allowing their effects on the temperature to be more easily observed.

  5. Radiological Contingency Planning for the Mars Science Laboratory Launch

    SciTech Connect (OSTI)

    Paul P. Guss

    2008-04-01

    This paper describes the contingency planning for the launch of the Mars Science Laboratory scheduled for the 21-day window beginning on September 15, 2009. National Security Technologies, LLC (NSTec), based in Las Vegas, Nevada, will support the U.S. Department of Energy (DOE) in its role for managing the overall radiological contingency planning support effort. This paper will focus on new technologies that NSTec’s Remote Sensing Laboratory (RSL) is developing to enhance the overall response capability that would be required for a highly unlikely anomaly. This paper presents recent advances in collecting and collating data transmitted from deployed teams and sensors. RSL is responsible to prepare the contingency planning for a range of areas from monitoring and assessment, sample collection and control, contaminated material release criteria, data management, reporting, recording, and even communications. The tools RSL has available to support these efforts will be reported. The data platform RSL will provide shall also be compatible with integration of assets and field data acquired with other DOE, National Space and Aeronautics and Space Administration (NASA), state, and local resources, personnel, and equipment. This paper also outlines the organizational structure for response elements in radiological contingency planning.

  6. Radiological Contingency Planning for the Mars Science Laboratory Launch

    SciTech Connect (OSTI)

    Paul Guss, Robert Augdahl, Bill Nickels, Cassandra Zellers

    2008-04-16

    This paper describes the contingency planning for the launch of the Mars Science Laboratory scheduled for the 21-day window beginning on September 15, 2009. National Security Technologies, LLC (NSTec), based in Las Vegas, Nevada, will support the U.S. Department of Energy (DOE) in its role for managing the overall radiological contingency planning support effort. This paper will focus on new technologies that NSTec’s Remote Sensing Laboratory (RSL) is developing to enhance the overall response capability that would be required for a highly unlikely anomaly. This paper presents recent advances in collecting and collating data transmitted from deployed teams and sensors. RSL is responsible to prepare the contingency planning for a range of areas from monitoring and assessment, sample collection and control, contaminated material release criteria, data management, reporting, recording, and even communications. The tools RSL has available to support these efforts will be reported. The data platform RSL will provide shall also be compatible with integration of assets and field data acquired with other DOE, National Aeronautics and Space Administration, state, and local resources, personnel, and equipment. This paper also outlines the organizational structure for response elements in radiological contingency planning.

  7. Reliability comparison of various nuclear propulsion configurations for Mars mission

    SciTech Connect (OSTI)

    Segna, D.R. [USDOE Richland Operations Office, WA (United States); Dagle, J.E. [Pacific Northwest Lab., Richland, WA (United States); Lyon, W.F. III [Westinghouse Hanford Co., Richland, WA (United States)

    1992-01-01

    Currently, trade-offs are being made among the various propulsion systems being considered for the Space Exploration Initiative (SEI) missions. It is necessary to investigate the reliability aspects as well as the efficiency, mass savings, and experience characteristics of the various configurations. Reliability is a very important factor for the SEI missions because of the long duration and because problems will be fixed onboard. The propulsion options that were reviewed consist of nuclear thermal propulsion (NTP), nuclear electric propulsion (NEP) and various configurations of each system. There were four configurations developed for comparison with the NTP as baselined in the Synthesis (1991): (1) NEP, (2) hybrid NEP/NTP, (3) hybrid with power beaming, and (4) NTP upper stage on the heavy lift launch vehicle (HLLV). The comparisons were based more or less on a qualitative review of complexity, stress levels and operations for each of the four configurations. Each configuration included a pressurized NEP and an NTP ascent stage propulsion system for the Mars mission.

  8. Impact inducted surface heating by planetesimals on early Mars

    E-Print Network [OSTI]

    Maindl, T I; Lammer, H; Güdel, M; Schäfer, C; Speith, R; Odert, P; Erkaev, N V; Kislyakova, K G; Pilat-Lohinger, E

    2014-01-01

    We investigate the influence of impacts of large planetesimals and small planetary embryos on the early Martian surface on the hydrodynamic escape of an early steam atmosphere that is exposed to the high soft X-ray and EUV flux of the young Sun. Impact statistics in terms of number, masses, velocities, and angles of asteroid impacts onto the early Mars are determined via n-body integrations. Based on these statistics, smoothed particle hydrodynamics (SPH) simulations result in estimates of energy transfer into the planetary surface material and according surface heating. For the estimation of the atmospheric escape rates we applied a soft X-ray and EUV absorption model and a 1-D upper atmosphere hydrodynamic model to a magma ocean-related catastrophically outgassed steam atmosphere with surface pressure values of 52 bar H2O and 11 bar CO2. The estimated impact rates and energy deposition onto an early Martian surface can account for substantial heating. The energy influx and conversion rate into internal ener...

  9. Modeling the variations of Dose Rate measured by RAD during the first MSL Martian year: 2012-2014

    E-Print Network [OSTI]

    Jingnan Guo; Cary Zeitlin; Robert F. Wimmer-Schweingruber; Scot Rafkin; Donald M. Hassler; Arik Posner; Bernd Heber; Jan Koehler; Bent Ehresmann; Jan K. Appel; Eckart Boehm; Stephan Boettcher; Soenke Burmeister; David E. Brinza; Henning Lohf; Cesar Martin; H. Kahanpaeae; Guenther Reitz

    2015-07-13

    The Radiation Assessment Detector (RAD), on board Mars Science Laboratory's (MSL) rover Curiosity, measures the {energy spectra} of both energetic charged and neutral particles along with the radiation dose rate at the surface of Mars. With these first-ever measurements on the Martian surface, RAD observed several effects influencing the galactic cosmic ray (GCR) induced surface radiation dose concurrently: [a] short-term diurnal variations of the Martian atmospheric pressure caused by daily thermal tides, [b] long-term seasonal pressure changes in the Martian atmosphere, and [c] the modulation of the primary GCR flux by the heliospheric magnetic field, which correlates with long-term solar activity and the rotation of the Sun. The RAD surface dose measurements, along with the surface pressure data and the solar modulation factor, are analysed and fitted to empirical models which quantitatively demonstrate} how the long-term influences ([b] and [c]) are related to the measured dose rates. {Correspondingly we can estimate dose rate and dose equivalents under different solar modulations and different atmospheric conditions, thus allowing empirical predictions of the Martian surface radiation environment.

  10. Modeling the variations of Dose Rate measured by RAD during the first MSL Martian year: 2012-2014

    E-Print Network [OSTI]

    Jingnan Guo; Cary Zeitlin; Robert F. Wimmer-Schweingruber; Scot Rafkin; Donald M. Hassler; Arik Posner; Bernd Heber; Jan Koehler; Bent Ehresmann; Jan K. Appel; Eckart Boehm; Stephan Boettcher; Soenke Burmeister; David E. Brinza; Henning Lohf; Cesar Martin; H. Kahanpaeae; Guenther Reitz

    2015-09-21

    The Radiation Assessment Detector (RAD), on board Mars Science Laboratory's (MSL) rover Curiosity, measures the {energy spectra} of both energetic charged and neutral particles along with the radiation dose rate at the surface of Mars. With these first-ever measurements on the Martian surface, RAD observed several effects influencing the galactic cosmic ray (GCR) induced surface radiation dose concurrently: [a] short-term diurnal variations of the Martian atmospheric pressure caused by daily thermal tides, [b] long-term seasonal pressure changes in the Martian atmosphere, and [c] the modulation of the primary GCR flux by the heliospheric magnetic field, which correlates with long-term solar activity and the rotation of the Sun. The RAD surface dose measurements, along with the surface pressure data and the solar modulation factor, are analysed and fitted to empirical models which quantitatively demonstrate} how the long-term influences ([b] and [c]) are related to the measured dose rates. {Correspondingly we can estimate dose rate and dose equivalents under different solar modulations and different atmospheric conditions, thus allowing empirical predictions of the Martian surface radiation environment.

  11. Mars atmospheric CO[subscript 2] condensation above the north and south poles as revealed by radio occultation, climate sounder, and laser ranging observations

    E-Print Network [OSTI]

    Hu, Renyu

    [1] We study the condensation of CO[subscript 2] in Mars' atmosphere using temperature profiles retrieved from radio occultation measurements from Mars Global Surveyor (MGS) as well as the climate sounding instrument onboard ...

  12. Formation of methane on Mars by fluid-rock interaction in the crust James R. Lyons,1

    E-Print Network [OSTI]

    Nimmo, Francis

    Formation of methane on Mars by fluid-rock interaction in the crust James R. Lyons,1 Craig Manning by magmatic degassing from a dike with only 50 ppm C. Atmospheric methane strongly suggests ongoing magmatism and hydrothermal alteration on Mars. Citation: Lyons, J. R., C. Manning, and F. Nimmo (2005), Formation of methane

  13. Sixth International Conference on Aeolian Research, Guelph, Canada. 2006 Barchan dune morphodynamics and linear dune formation on Mars

    E-Print Network [OSTI]

    Bourke, Mary C.

    Sixth International Conference on Aeolian Research, Guelph, Canada. 2006 Barchan dune morphodynamics and linear dune formation on Mars Mary C. Bourke, Planetary Science Institute, Tucson, mbourke@psi.edu Observations of sand dunes in satellite images indicate a wide variety of dune forms on Mars. Similar to Earth

  14. 1 Managed by UT-Battelle for the U.S. Department of Energy MERIT Videoconference 11 Mar 2009

    E-Print Network [OSTI]

    McDonald, Kirk

    1 Managed by UT-Battelle for the U.S. Department of Energy MERIT Videoconference 11 Mar 2009 · Containment encompasses nozzle tip #12;3 Managed by UT-Battelle for the U.S. Department of Energy MERIT Concept ORNL/VG Mar2009 Splash Mitigator #12;4 Managed by UT-Battelle for the U.S. Department of Energy

  15. Genetic signature of a recent invasion: The ragged sea hare Bursatella leachii in Mar Menor (SE Spain)

    E-Print Network [OSTI]

    Borges, Rita

    Genetic signature of a recent invasion: The ragged sea hare Bursatella leachii in Mar Menor (SE, Portugal b Departamento de Ciencias del Mar y Biología Aplicada, Universidad de Alicante, Campus de San hypothesis for the origin of invasions is that colonization by invasive species is most often associated

  16. Hydrothermal formation of Clay-Carbonate alteration assemblages in the Nili Fossae region of Mars

    E-Print Network [OSTI]

    Brown, Adrian J; Baldridge, Alice M; Crowley, James K; Bridges, Nathan T; Thomson, Bradley J; Marion, Giles M; Filho, Carlos R de Souza; Bishop, Janice L

    2014-01-01

    The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) has returned observations of the Nili Fossae region indicating the presence of Mg- carbonate in small (characterize these carbonate-bearing units. We applied absorption band mapping techniques to investigate a range of possible phyllosilicate and carbonate minerals that could be present in the Nili Fossae region. We also describe a clay-carbonate hydrothermal alteration mineral assemblage in the Archean Warrawoona Group of Western Australia that is a potential Earth analog to the Nili Fossae carbonate-bearing rock units. We discuss the geological and biological implications for hydrothermal processes on Noachian Mars.

  17. Radiation dose estimates for typical piloted NTR lunar and Mars mission engine operations

    SciTech Connect (OSTI)

    Schnitzler, B.G. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Borowski, S.K. (National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center)

    1991-01-01

    The natural and manmade radiation environments to be encountered during lunar and Mars missions are qualitatively summarized. The computational methods available to characterize the radiation environment produced by an operating nuclear propulsion system are discussed. Mission profiles and vehicle configurations are presented for a typical all-propulsive, fully reusable lunar mission and for a typical all-propulsive Mars mission. Estimates of crew location biological doses are developed for all propulsive maneuvers. Post-shutdown dose rates near the nuclear engine are estimated at selected mission times. 15 refs., 4 figs.

  18. Don't look for little green men of Mars to be skinny-dipping in canals, but their dousing rods

    E-Print Network [OSTI]

    Eustice, Ryan

    water. In 2002 the Mars Odyssey Orbiter found large amounts of water ice below the surface of Mars blew away the top layer of soil, a layer of water ice was uncovered. One very exciting moment Mars science strategy "Follow the Water," Phoenix aimed to dig up and examine the water ice, to (1

  19. PRINT ONLY: MARS Kress A. Head J. W. Marchant D. R.

    E-Print Network [OSTI]

    Rathbun, Julie A.

    larger glacial landsystems. López V. Tejero R. Ruiz J. Gómez-Ortiz D. The Elevation Range of the Possible of the manual counts in several adjacent diameter bins. Popa I. C. Salt Triggered Melting of Permafrost as an alternative cause for permafrost melting in chaos regions on Mars. This process, along with the fluid freezing

  20. Detecting sub-glacial aquifers in the north polar layered deposits with Mars Express/MARSIS

    E-Print Network [OSTI]

    Gurnett, Donald A.

    effects, local geothermal hot spots, or heat-generating glacial sliding. Ice cap basal melting mayDetecting sub-glacial aquifers in the north polar layered deposits with Mars Express/MARSIS W. M into the polar ice mass is modeled to determine the capability of the instrument to locate sub-glacial aquifers

  1. Carbon geochemistry of serpentinites in the Lost City Hydrothermal System (30N, MAR)

    E-Print Network [OSTI]

    Gilli, Adrian

    Massif (Mid-Atlantic Ridge, 30°N) was exam- ined to characterize carbon sources and speciation in oceanic. The speciation of carbon de- pends on the chemical and physical conditions prevailing in the reservoir, and itsCarbon geochemistry of serpentinites in the Lost City Hydrothermal System (30°N, MAR) Ade

  2. Joint and Conflat Leakage, March 2007 Tests P. Titus, MIT (Mar. 7,2007)

    E-Print Network [OSTI]

    McDonald, Kirk

    Joint and Conflat Leakage, March 2007 Tests P. Titus, MIT (Mar. 7,2007) · Problems feed closure valve that was "found equipment" · Cobbled together cryogenic system does not represent detected from the center terminal assembly. #12;Joint and Conflat Leakage, March 2007 Tests · During March

  3. Mesoscale Spectra of Mars's Atmosphere Derived from MGS TES Infrared Radiances TAKESHI IMAMURA

    E-Print Network [OSTI]

    and potential energy spectra as a function of horizontal wavenumber. Each spectrum has two different wave spectra of the atmospheric potential energy of Mars at mesoscales (wavelengths of 64­957 km) were obtained-scale ends, the spectra sometimes show prominent steepening with slopes from 2 to 3. The power peaks

  4. SALINE LAKES ON QINGHAI-TIBET PLATEAU AND SALTS ON MARS1 M. P. Zheng1

    E-Print Network [OSTI]

    SALINE LAKES ON QINGHAI-TIBET PLATEAU AND SALTS ON MARS1 M. P. Zheng1 , A. Wang2 , F. J. Kong1 , N of tectonically active belts of plateaus on the Earth [3]. The Qinghai-Tibet Plateau accounts for 1

  5. Wednesday, March 14, 2007 MARS SEDIMENTS AND GEOCHEMISTRY: THE MAP VIEW

    E-Print Network [OSTI]

    Rathbun, Julie A.

    the type of material. 2:30 p.m. Dromart G. * Quantin C. Broucke O. Stratigraphic Architectures in Southern Melas Basin, Valles Marineris, Mars [#1089] We report an identification of stratigraphic architectures the northern plains. 3:45 p.m. Pearce G. P. * Veillette D. Soare R. J. Ground Ice in Utopia Planitia: A Late

  6. Small-scale methane dispersion modelling for possible plume sources on the surface of Mars

    E-Print Network [OSTI]

    Strong, Kimberly

    Small-scale methane dispersion modelling for possible plume sources on the surface of Mars K. S 2012; published 11 October 2012. [1] Intense interest in the characteristics of a methane source Laboratory and future landers and orbiters will be tasked with understanding the sources of methane

  7. Joint Institute for Marine and Atmospheric Research (J/MAR) University of Hawaii, Honolulu, Hawaii 96822

    E-Print Network [OSTI]

    Joint Institute for Marine and Atmospheric Research (J/MAR) University of Hawaii, Honolulu, Hawaii 96822 Department of Oceanography, School of Ocean and Earth Science and Technology University of Hawaii, Honolulu. Hawaii 96822 Department of Oceanography, School of Ocean and Earth Science and Technology

  8. NASA/TP-2005-213164 Managing Lunar and Mars Mission

    E-Print Network [OSTI]

    Rathbun, Julie A.

    NASA/TP-2005-213164 Managing Lunar and Mars Mission Radiation Risks Part I: Cancer Risks, Uncertainties, and Shielding Effectiveness Francis A. Cucinotta NASA Lyndon B. Johnson Space Center Houston Division Houston, Texas July 2005 #12;THE NASA STI PROGRAM OFFICE . . . IN PROFILE Since its founding, NASA

  9. Chemical markers of possible hot spots on Mars Ah-San Wong and Sushil K. Atreya

    E-Print Network [OSTI]

    Atreya, Sushil

    not be ruled out. If outgassing does occur somewhere on Mars, water, carbon dioxide, sulfur species, methane that includes methane (CH4), sulfur dioxide (SO2), and hydrogen sulfide (H2S), starting with their current and the resulting new molecules may be detectable locally, either by remote sensing or in situ measurements. INDEX

  10. Atmosphere-crust coupling and carbon sequestration on the young Mars Professor Martin R. Lee1

    E-Print Network [OSTI]

    Guo, Zaoyang

    Atmosphere-crust coupling and carbon sequestration on the young Mars Professor Martin R. Lee1 *, Dr the idea that CO2 was `scrubbed' by precipitation of carbonate minerals within the planet's crust - a reaction termed `carbonation'. This project will seek evidence for carbonation by analysis of martian

  11. JOURNAL DE PHYSIQUE Colloque Cl, Suppl6ment au n03, Tome 49, Mars 1988

    E-Print Network [OSTI]

    Boyer, Edmond

    JOURNAL DE PHYSIQUE Colloque Cl, Suppl6ment au n03, Tome 49, Mars 1988 SOLAR PHYSICS FROM SPACELAB systematic observations of the solar atmosphere at high resolution and to measure specific global properties of the sun. The Solar Optical Universal Polarimeter recorded series of white light images with which

  12. The Fluid Mechanics of Arthropod Sniffing in Turbulent Odor Plumes M.A.R. Koehl

    E-Print Network [OSTI]

    Koehl, Mimi

    The Fluid Mechanics of Arthropod Sniffing in Turbulent Odor Plumes M.A.R. Koehl Department on the speed at which they are moved through the surrounding fluid. Therefore, antennule flicking of a hair-bearing arthropod antennule with the surrounding fluid affects the temporal patterns of odor

  13. arXiv:physics/0211010v225Mar2003 Citation Networks in High Energy Physics

    E-Print Network [OSTI]

    arXiv:physics/0211010v225Mar2003 Citation Networks in High Energy Physics S. Lehmann, B. Lautrup. The probability that a given paper in the SPIRES data base has k citations is well described by simple power laws are presented that both represent the data well, one which generates power laws and one which generates

  14. A scaling law for aeolian dunes on Mars, Venus, Earth, and for subaqueous ripples

    E-Print Network [OSTI]

    Claudin, Philippe

    A scaling law for aeolian dunes on Mars, Venus, Earth, and for subaqueous ripples Philippe Claudin to a turbulent shear flow predicts that the wavelength at which the bed destabilises to form dunes should scale in water (subaqueous ripples), in air (aeolian dunes and fresh snow dunes), in a high pressure CO2 wind

  15. Can freezing cause floods on Mars? Chi-yuen Wang,1

    E-Print Network [OSTI]

    Manga, Michael

    Can freezing cause floods on Mars? Chi-yuen Wang,1 Michael Manga,1 and Jeffrey C. Hanna2 Received to examine freezing-induced pressurization as a mechanism for releasing groundwater. The results suggest that freezing of an aquifer of global extent under the optimal conditions, i.e., perfectly confined and with low

  16. OCTOBER 2013 IEEE CONTROL SYSTEMS MAGAZINE 27 RATNESh KuMAR

    E-Print Network [OSTI]

    Kumar, Ratnesh

    -control systems, and this work further provided entry into the field of formal verification of logi- cal (e for precision agriculture (IBM). » Licheng Jin worked on model predictive control of power sys-OCTOBER 2013 « IEEE CONTROL SYSTEMS MAGAZINE 27 RATNESh KuMAR Q. How did your education and career

  17. SPACE DAILY SPACE WAR TERRA DAILY MARS DAILY SPACE MART SPACE TRAVEL World's Smallest Universal Material

    E-Print Network [OSTI]

    Espinosa, Horacio D.

    SPACE DAILY SPACE WAR TERRA DAILY MARS DAILY SPACE MART SPACE TRAVEL NANO TECH World's Smallest, professor of mechanical Get Our Free Newsletters Via Email Space - War - Earth - Energy - China your email yes Search All Of Our Sites In One Search SpaceDaily - SpaceWar - TerraDaily Search Horacio D

  18. MH Vignal-Expos CEA-CESTA, 25 Mars 2004-Modlisation et simulations numriques

    E-Print Network [OSTI]

    Vignal, Marie-Hélène

    se détend. « Quand le plasma atteint l'anode, un arc est créé. #12;MH Vignal- Exposé CEA-CESTA, 25 de plasma entre deux électrodes P. Crispel, P. Degond, C. Parzani, M. H. Vignal Laboratoire MIP, CNRS Vignal- Exposé CEA-CESTA, 25 Mars 2004- 4Diodes à forts courants (2) « Diode à forts courants E Plasma

  19. hal-00125705,version4-21Mar2007 Connected allocation to Poisson points in R2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    hal-00125705,version4-21Mar2007 Connected allocation to Poisson points in R2 Maxim Krikun March 21, the elements of Rd ­ sites, and we write L for the Lebesgue measure in R2 . An allocation of Rd to X with appetite [0, ] is a measurable function : Rd X {, } such that L-1 () for all X and L-1 () = 0. We

  20. Project EARTH-12-BW2: An experimental study of the accretion and differentiation of Mars

    E-Print Network [OSTI]

    Henderson, Gideon

    Project EARTH-12-BW2: An experimental study of the accretion and differentiation of Mars Supervisor: Professor B J Wood Recent research has shown that the Earth accreted and differentiated over a time period of 30-40 M.yr and that Earth became more oxidised as it grew. Stable continental crust

  1. Evaluation of melting process of the permafrost on Mars: Its implication for surface features

    E-Print Network [OSTI]

    Manga, Michael

    . The point of our simulation is incorporation of thermal convection in porous media, which has not been in the melted zone causes drastic change in heat transfer, which results in focusing in the growth of the melt surface features around the outflow channels. INDEX TERMS: 6225 Planetology: Solar System Objects: Mars

  2. Aust. J. Mar. Freshw. Res., 1984, 35, 119-28 Aromatic Hydrocarbons in Waters of

    E-Print Network [OSTI]

    Canberra, University of

    Aust. J. Mar. Freshw. Res., 1984, 35, 119-28 Aromatic Hydrocarbons in Waters of Port Phillip Bay of aromatic hydrocarbons in coastal waters, using solvent extraction and fluorescence emission analysis, shows and the Yarra River estuary. Introduction Pollution of the marine environment by petroleum hydrocarbons

  3. Groundwater-controlled valley networks and the decline of surface runoff on early Mars

    E-Print Network [OSTI]

    Harrison, Keith

    Groundwater-controlled valley networks and the decline of surface runoff on early Mars Keith P was dominated by valley networks created through a combination of groundwater processes and surface runoff evolution characterized by a weakening of surface runoff, leaving groundwater processes as the dominant

  4. Ancient groundwater flow in the Valles Marineris on Mars inferred from

    E-Print Network [OSTI]

    Treiman, Allan H.

    LETTERS Ancient groundwater flow in the Valles Marineris on Mars inferred from fault trace ridges e-mail: treiman@lpi.usra.edu Published online: XX Month XXXX; doi:10.1038/ngeoXXXX Groundwater of bedrock3­6 .2 Understanding groundwater flow is also important for assessing3 the possibility of past

  5. HEART RATE AND BLOOD PRESSURE VARIABILITY UNDER MOON, MARS AND ZERO GRAVITY CONDITIONS DURING PARABOLIC FLIGHTS

    E-Print Network [OSTI]

    HEART RATE AND BLOOD PRESSURE VARIABILITY UNDER MOON, MARS AND ZERO GRAVITY CONDITIONS DURING), studied via the heart rate variability (HRV) and blood pressure variability (BPV). HRV and BPV were predominant during reduced gravity. For the mean heart rate, a non-monotonic relation was found, which can

  6. Detection of copiapite in the northern Mawrth Vallis region of Mars: Evidence of acid sulfate alteration

    E-Print Network [OSTI]

    Glotch, Timothy D.

    coatings in acid mine drainage environments or in association with acid sulfate soils. The pres- enceDetection of copiapite in the northern Mawrth Vallis region of Mars: Evidence of acid sulfate of jarosite and copiapite indicates the presence of acidic waters. Such acid waters could have contrib- uted

  7. Catal Espaol English Canons i talussos profunds en els MARS Mediterrani i Cantbric: des de la

    E-Print Network [OSTI]

    Martin, Daniel

    Recursos Marins Renovables de l'Institut de Ciències del Mar del CSIC a Barcelona i el GRC d'estudi de les transferències de matèria i energia en l'oceà i en processos físics del fons marí, en biologia transferències de matèria i energia cap l'ecosistema profund. Des del punt de vista biològic, al Cantàbric es

  8. Dr. John Slough "Rapid Manned Mars Mission with a Propagating Magnetic Wave

    E-Print Network [OSTI]

    Shepherd, Simon

    Dr. John Slough MSNW "Rapid Manned Mars Mission with a Propagating Magnetic Wave Plasma Accelerator" For man to venture forth into the solar system, a radically different propulsion system must be envisioned problem. This is accomplished by employing a travelling magnetic wave accelerator to accelerate

  9. Mars aerosol studies with the MGS TES emission phase function observations: Optical depths, particle

    E-Print Network [OSTI]

    Whitney, Barbara A.

    aerosol properties to date. TES solar band and infrared (IR) spectral EPF sequences are analyzed to obtain and scattering of radiation; 6225 Planetology: Solar System Objects: Mars; KEYWORDS: Martian atmosphere, aerosols, radiative forcing from atmo- spheric dust solar absorption and thermal emission was recognized as a primary

  10. OBSERVATIONS OF PLASMA WAVES NEAR MARS AND THEIR IMPLICATIONS FOR ATMOSPHERIC LOSS. J. R. Espley1

    E-Print Network [OSTI]

    California at Berkeley, University of

    NASA Goddard Space Flight Center, Greenbelt, MD Summary: We use data from over 500 pre- mapping orbits (and therefore climate change). We present in this work observations of magnetic oscillations of Mars Global Surveyor magnetome- ter data to present statistical results on the characteris- tics

  11. An alkaline spring system within the Del Puerto Ophiolite (California, USA): A Mars analog site

    E-Print Network [OSTI]

    Meyers, Stephen R.

    that could be used in the search for evidence of life on Mars. & 2008 Elsevier Ltd. All rights reserved. 1 life-bearing systems. Serpentinization, the reaction of water with mafic minerals such as olivine is associated with the precipitation of Mg­Ca carbonate cements. The carbonates may serve as a biosignature

  12. Organisation of the soil mantle in tropical southeastern Brazil (Serra do Mar)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Organisation of the soil mantle in tropical southeastern Brazil (Serra do Mar) in relation-900 Sao Paulo ­ SP, Brazil And INRA-ENSA. Laboratoire des sciences du sol 65 rue de St Brieuc 35042 RennesORSTOM - Instituto de geociencias - DGG ­ USP C.P. 11 348 Cep: 05 422-970 Sao Paulo ­ SP, Brazil Correspondence

  13. HJB---Mar/94 Theory of Local Observables and KMS--Condition

    E-Print Network [OSTI]

    that locality and spectrum condition seem to be good for defining acceptable dynamics. If we use the theoryHJB--- Mar/94 Theory of Local Observables and KMS--Condition Dedicated to Bert Schroer is a theory of local observables then it will be shown that locality condition implies that there do not exist

  14. Italian Forest Certification System Seeks Re-Endorsement by PEFC MAR 03 2010 | INTERNATIONAL

    E-Print Network [OSTI]

    Italian Forest Certification System Seeks Re-Endorsement by PEFC MAR 03 2010 | INTERNATIONAL process of national systems seeking recognition by PEFC at international level. The current endorsement in the standard setting forum," said Antonio Brunori, Secretary General of PEFC Italy. "The year- long process

  15. Mar Biol (2008) 154:465474 DOI 10.1007/s00227-008-0941-z

    E-Print Network [OSTI]

    2008-01-01

    Mar Biol (2008) 154:465­474 DOI 10.1007/s00227-008-0941-z 123 RESEARCH ARTICLE Tropical Wshes diversity, even in the eastern basin, pointing to an ancient colonization event. This suggests that both may reXect the re-colonization of areas in the Atlantic by Wsh that survived the cold phases in rela

  16. Energetic particles detected by the Electron Reflectometer instrument on the Mars

    E-Print Network [OSTI]

    California at Berkeley, University of

    ) spacecraft from May of 1999 to the mission conclusion in November 2006. Originally designed to detect low Reflectometer instrument on the Mars Global Surveyor, 1999­2006, Space Weather, 10, S06003, doi:10.1029/2012SW on the terrestrial environment is well known, and include communications and power disruptions, damage or even

  17. ccsd-00021119,version1-17Mar2006 Light transport in cold atoms and thermal decoherence

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ccsd-00021119,version1-17Mar2006 Light transport in cold atoms and thermal decoherence G. Labeyrie, we investigate experimentally and the- oretically how coherent transport of light inside a cold motivated by astrophysical purposes, wave transport in opaque media was first analyzed through a detailed

  18. Compositions of subsurface ices at the Mars Phoenix landing site Selby Cull,1

    E-Print Network [OSTI]

    Skemer, Philip

    Compositions of subsurface ices at the Mars Phoenix landing site Selby Cull,1 Raymond E. Arvidson,1 25 October 2010; accepted 2 November 2010; published 22 December 2010. [1] NASA's Phoenix Lander that broke during Robotic Arm operations; and a darker icy deposit. Spectra from the Phoenix Surface Stereo

  19. Mar. Drugs 2015, 13, 3154-3181; doi:10.3390/md13053154 marine drugs

    E-Print Network [OSTI]

    Paré, Paul W.

    Mar. Drugs 2015, 13, 3154-3181; doi:10.3390/md13053154 marine drugs ISSN 1660-3397 www.mdpi.com/journal/marinedrugs Review Molecular Architecture and Biomedical Leads of Terpenes from Red Sea Marine Invertebrates Mohamed Costantino Received: 9 April 2015 / Accepted: 7 May 2015 / Published: 20 May 2015 Abstract: Marine

  20. Thursday, March 26, 2009 POSTER SESSION II: MARS ANALOGS: CHEMICAL AND PHYSICAL

    E-Print Network [OSTI]

    Rathbun, Julie A.

    . Experimental Study of the Kinetics of CO2 Hydrate Dissociation Under Simulated Martian Conditions [#1341] We performed an experimental study of the kinetics of CO2 hydrate dissociation under simulated martian and Implications for Mars: Current Knowledge and Gaps [#2187] Terrestrial concretion analogs indicate that small

  1. Mar. Drugs 2013, 11, 4370-4389; doi:10.3390/md11114370 marine drugs

    E-Print Network [OSTI]

    Eirin Lopez, Jose Maria

    Mar. Drugs 2013, 11, 4370-4389; doi:10.3390/md11114370 marine drugs ISSN 1660-3397 www.mdpi.com/journal/marinedrugs Review Bivalve Omics: State of the Art and Potential Applications for the Biomonitoring of Harmful Marine of the marine ecosystem, constitute very valuable commercial resources in aquaculture, and have been widely used

  2. Mar 24th 2011 | from the print edition 0 40Like Battery technology

    E-Print Network [OSTI]

    Braun, Paul

    Mar 24th 2011 | from the print edition 0 40Like Battery technology Highly charged A powerful experimental battery that can be recharged completely in minutes ENGINEERS have long dreamed of shortening the time it takes to recharge batteries. Currently, that can be hours. For applications like motor vehicles

  3. Liquid Metal Flow Can Be One Clue to Explain the Frequently Observed Fluid-Like Matters on Mars

    E-Print Network [OSTI]

    Jing Liu; Yunxia Gao; Huangde Li

    2013-10-07

    The frequently discovered flooding structure on Mars and other planets has long been an intriguing mystery remained un-disclosed so far. Considering that on Earth, quite a few low melting point liquid metals or their alloy can be candidates of fluid like matters, we proposed here that there might also exists certain liquid metal instead of water or methane alone on Mars or the like planets. Compared with water, such liquid metal would be much easier to stay at the Mars surface because of its low melting point however extremely high evaporation point. Along this theoretical route, quite a few observations on the fluid like matters in former space explorations can be well interpreted. Such hypothesis for the existence of liquid metal on Mars surface does not mean refuting the possibility of water on Mars. This new point would be helpful for planning further exploration of Mars in a sense according to the characters of liquid metal. It at least identifies one more target fluid towards either finding or denying life at outer space. Whether the planet could harbor life in some form or it reaffirms Mars as an important future destination for human exploration still needs serious but not just enthusiasm explorations.

  4. Mapping analysis of scaffold/matrix attachment regions (s/MARs) from two different mammalian cell lines

    SciTech Connect (OSTI)

    Pilus, Nur Shazwani Mohd; Ahmad, Azrin; Yusof, Nurul Yuziana Mohd [School of Bioscience and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia); Johari, Norazfa [Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia)

    2014-09-03

    Scaffold/matrix attachment regions (S/MARs) are potential element that can be integrated into expression vector to increase expression of recombinant protein. Many studies on S/MAR have been done but none has revealed the distribution of S/MAR in a genome. In this study, we have isolated S/MAR sequences from HEK293 and Chinese hamster ovary cell lines (CHO DG44) using two different methods utilizing 2 M NaCl and lithium-3,5-diiodosalicylate (LIS). The isolated S/MARs were sequenced using Next Generation Sequencing (NGS) platform. Based on reference mapping analysis against human genome database, a total of 8,994,856 and 8,412,672 contigs of S/MAR sequences were retrieved from 2M NaCl and LIS extraction of HEK293 respectively. On the other hand, reference mapping analysis of S/MAR derived from CHO DG44 against our own CHO DG44 database have generated a total of 7,204,348 and 4,672,913 contigs from 2 M NaCl and LIS extraction method respectively.

  5. Nuclear electric propulsion: A better, safer, cheaper transportation system for human exploration of Mars

    SciTech Connect (OSTI)

    Clark, J.S.; George, J.A.; Gefert, L.P.; Doherty, M.P.; Sefcik, R.J.

    1994-03-01

    NASA has completed a preliminary mission and systems study of nuclear electric propulsion (NEP) systems for split-sprint' human exploration and related robotic cargo missions to Mars. This paper describes the study, the mission architecture selected, the NEP system and technology development needs, proposed development schedules, and estimated development costs. Since current administration policy makers have delayed funding for key technology development activities that could make Mars exploration missions a reality in the near future, NASA will have time to evaluate various alternate mission options, and it appears prudent to ensure that Mars mission plans focus on astronaut and mission safety, while reducing costs to acceptable levels. The split-sprint nuclear electric propulsion system offers trip times comparable to nuclear thermal propulsion (NTP) systems, while providing mission abort opportunities that are not possible with reference' mission architectures. Thus, NEP systems offer short transit times for the astronauts, reducing the exposure of the crew to intergalactic cosmic radiation. The high specific impulse of the NEP system, which leads to very low propellant requirements, results in significantly lower initial mass in low earth orbit' (IMLEO). Launch vehicle packaging studies show that the NEP system can be launched, assembled, and deployed, with about one less 240-metric-ton heavy lift launch vehicle (HLLV) per mission opportunity - a very Technology development cost of the nuclear reactor for an NEP system would be shared with the proposed nuclear surface power systems, since nuclear systems will be required to provide substantial electrical power on the surface of Mars. The NEP development project plan proposed includes evolutionary technology development for nuclear electric propulsion systems that expands upon SP-100 (Space Power - 100 kw(e)) technology that has been developed for lunar and Mars surface nuclear power.

  6. Downloaded 23 Mar 2004 to 155.101.19.17. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp Downloaded 23 Mar 2004 to 155.101.19.17. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/c

    E-Print Network [OSTI]

    Simons, Jack

    Downloaded 23 Mar 2004 to 155.101.19.17. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp #12;Downloaded 23 Mar 2004 to 155.101.19.17. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp #12;Downloaded 23 Mar 2004

  7. Downloaded 13 Mar 2004 to 129.97.80.195. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp Downloaded 13 Mar 2004 to 129.97.80.195. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/c

    E-Print Network [OSTI]

    Le Roy, Robert J.

    Downloaded 13 Mar 2004 to 129.97.80.195. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp #12;Downloaded 13 Mar 2004 to 129.97.80.195. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp #12;Downloaded 13 Mar 2004

  8. Downloaded 23 Mar 2004 to 146.6.139.170. Redistribution subject to AIP license or copyright, see http://jmp.aip.org/jmp/copyright.jsp Downloaded 23 Mar 2004 to 146.6.139.170. Redistribution subject to AIP license or copyright, see http://jmp.aip.org/jmp/c

    E-Print Network [OSTI]

    Radin, Charles

    Downloaded 23 Mar 2004 to 146.6.139.170. Redistribution subject to AIP license or copyright, see http://jmp.aip.org/jmp/copyright.jsp #12;Downloaded 23 Mar 2004 to 146.6.139.170. Redistribution subject to AIP license or copyright, see http://jmp.aip.org/jmp/copyright.jsp #12;Downloaded 23 Mar 2004

  9. ALGORITHMIC CLASSIFICATION OF DRAINAGE NETWORKS ON MARS AND ITS RELATION TO MARTIAN GEOLOGICAL UNITS. T. F. Stepinski1

    E-Print Network [OSTI]

    Vilalta, Ricardo

    ALGORITHMIC CLASSIFICATION OF DRAINAGE NETWORKS ON MARS AND ITS RELATION TO MARTIAN GEOLOGICAL locations covering 16 major geological units. The classification is quantitative and objective with an existing division into geological units. A morphological interpretation for this emergent classification

  10. arXiv:cond-mat/0503226v19Mar2005 Two Superconducting Phases in the d = 3 Hubbard Model

    E-Print Network [OSTI]

    Gozuacik, Devrim

    arXiv:cond-mat/0503226v19Mar2005 Two Superconducting Phases in the d = 3 Hubbard Model: Phase. The strong-coupling phase, on the other hand, has characteristics of BEC-type superconductivity, including

  11. Enhancing the science return of Mars missions via sample preparation, robotic surface exploration and in orbit fuel production

    E-Print Network [OSTI]

    Lamamy, Julien-Alexandre, 1978-

    2004-01-01

    The future of Mars exploration is challenging from multiple points of view. To enhance their science return, future surface probes will most likely be equipped with complex Sample Preparation And Transfer (SPAT) facilities. ...

  12. SEASONAL SNOWMELT VERSUS IMPACT-TRIGGERED RUNOFF IN MARS' GEOLOGIC RECORD OF SURFACE LIQUID WATER. E. S. Kite1

    E-Print Network [OSTI]

    on Early Mars is retreat of water ice to planetary cold traps. (Melt- ing is also suppressed at low, forcing seasonal melting (Fig. 1b). Strong sensitivity to orbital forcing, plus the knowledge

  13. QUANTITATIVE ANALYSES OF TERRESTRIAL CRATER DEPOSITS: CONSTRAINING FORMATION AND SEDIMENT TRANSPORT PROCESSES ON MARS. M. S. Ramsey1

    E-Print Network [OSTI]

    Ramsey, Michael

    PROCESSES ON MARS. M. S. Ramsey1 and D. A. Crown2 , 1 Department of Geology and Planetary Science, University of Pittsburgh, Pittsburgh, PA, 15260, ramsey@ivis.eps.pitt.edu, 2 Planetary Science Institute

  14. HiRISE observations of gas sublimation-driven activity in Mars' southern polar regions: I. Erosion of the surface

    E-Print Network [OSTI]

    Byrne, Shane

    complete mar- tian southern spring. In some areas of the surface, beneath the conformal coating of seasonal' Antarctic circle. The capability of the MRO spacecraft to roll off-nadir and image features at different

  15. IX Encontro de tecnologia em Acstica Submarina IX ETAS Instituto de Estudos do Mar Almirante Paulo Moreira

    E-Print Network [OSTI]

    Jesus, Sérgio M.

    IX Encontro de tecnologia em Acústica Submarina ­ IX ETAS Instituto de Estudos do Mar Almirante properties variability is analysed using the Doppler spread function. #12;IX Encontro de tecnologia em

  16. Received 28 Jun 2013 | Accepted 5 Mar 2014 | Published 1 Apr 2014 The Vibrio cholerae type VI secretion system

    E-Print Network [OSTI]

    MacMillan, Andrew

    ARTICLE Received 28 Jun 2013 | Accepted 5 Mar 2014 | Published 1 Apr 2014 The Vibrio cholerae type, toxigenic V. cholerae passes through the gastric acid barrier, expresses TCP, secretes CT and colonizes

  17. FIRST STEP IN THEORETICAL APPROACH IN STUDY OF MARS AND TITAN ATMOSPHERES WITH AN INDUCTIVELY COUPLED PLASMA TORCH

    E-Print Network [OSTI]

    with the titan atmosphere (CH4-N2) unlike the Mars atmosphere (CO2-N2). We observe the creation of solid], one can obtain the molar fraction versus temperature. The composition of Mars is assumed to be 97% CO22, CO2 - , N2O, N2O3, N2O4, N2O5, N2O+, N3, NCN, NO2, NO2 - , NO3, O3 and the electrons

  18. Comparison of Space Propulsion Methods for a Manned Mission to Mars

    E-Print Network [OSTI]

    Guerra, A G C; Gil, P J S

    2015-01-01

    We undertake a comparison of the latest developments in propulsion technologies, for a manned mission to Mars. The main objective is to assess the possibility of reducing travel time keeping the mass at departure within bounds. For the sake of comparison we used representative systems of different state of the art or proposed technologies, from the chemical engine to the "Pure Electro-Magnetic Thrust" (PEMT) concept, using a nuclear engine proposed by Rubbia. A mission architecture is suggested, based on existing mission proposals to Mars, to estimate the mass budget that influences the performance of the propulsion system. The trajectory of the spacecraft is determined by a numerical integration of the equations of motion and a partial optimization procedure, for the interplanetary phase with continuous thrust, and by conics and instant manoeuvres in the regions of influence of the departure and arrival planets. Pareto curves of the duration of the mission and time of flight versus mass of mission are drawn....

  19. The Mars thermosphere. 2. General circulation with coupled dynamics and composition

    SciTech Connect (OSTI)

    Bougher, S.W. (Univ. of Arizona, Tucson (USA)); Roble, R.G.; Ridley, E.C.; Dickinson, R.E. (National Center for Atmospheric Research, Boulder, CO (USA))

    1990-08-30

    The National Center for Atmospheric Research thermospheric general circulation model (TGCM) for the Earth's thermosphere has been modified to examine the three-dimensional structure and circulation of the upper mesosphere and thermosphere of Mars (MTGCM). The computational framework and major processes unique to a CO{sub 2} thermosphere are similar to those utilized in a recent Venus TGCM. Solar EUV, UV, and IR heating alone combine to drive the Martian winds above {approximately}100 km. An equinox version of the code is used to examine the Mars global dynamics and structure for two specific observational periods spanning a range of solar activity: Viking 1 (July 1976) and Mariner 6-7 (August-September 1969). The MTGCM is then modified to predict the state of the Mars thermosphere for various combinations of solar and orbital conditions. Calculations show that no nightside cryosphere of the type observed on Venus is obtained on the Mars nightside. Instead, planetary rotation significantly modifies the winds and the day-to-night contrast in densities and temperatures, giving a diurnal behavior similar to the Earth under quiet solar conditions. Maximum exospheric temperatures are calculated near 1,500 LT ({le} 305 K), with minimum values at 0500 LT ({le} 175 K). The global temperature distribution is strongly modified by nightside adiabatic heating (subsidence) and dayside cooling (upwelling). The global winds also affect vertical density distributions; vertical eddy diffusion much weaker than used in previous one-dimensional models is required to maintain observed Viking profiles. A solar cycle variation in dayside exospheric temperatures of {approximately}195-305 K is simulated by the Viking and Mariner runs.

  20. Development of a propulsion system and component test facility for advanced radioisotope powered Mars Hopper platforms

    SciTech Connect (OSTI)

    Robert C. O'Brien; Nathan D. Jerred; Steven D. Howe

    2011-02-01

    Verification and validation of design and modeling activities for radioisotope powered Mars Hopper platforms undertaken at the Center for Space Nuclear Research is essential for proof of concept. Previous research at the center has driven the selection of advanced material combinations; some of which require specialized handling capabilities. The development of a closed and contained test facility to forward this research is discussed within this paper.

  1. 125 total creditsMar. 15, 2013 (offered Fall/Spring)

    E-Print Network [OSTI]

    Carver, Jeffrey C.

    125 total creditsMar. 15, 2013 CH 101 General Chemistry 4 cr ECE 121 or ENGR 111 1 cr (offered Fall to Linear Algebra 3 cr ECE 285 Prog. for ECE 3 cr (offered Fall/Spring) CS 150 Programming I 2 cr PH106 cr (offered Fall/Spring) CS 351 CS Programming III 2 cr ECE380 Digital Logic 4 cr (offered Fall

  2. 125 total creditsMar. 15, 2013 (offered Fall/Spring)

    E-Print Network [OSTI]

    Carver, Jeffrey C.

    125 total creditsMar. 15, 2013 CH 101 General Chemistry 4 cr ECE 121 or ENGR 111 1 cr (offered Fall to Linear Algebra 3 cr ECE 285 Prog. for ECE 3 cr (offered Fall/Spring) CS 150 Programming I 2 cr PH106 cr (offered Fall/Spring) CS 351 CS Programming III 2 cr ECE 380 Digital Logic 4 cr (offered Fall

  3. Dose calculations using MARS for Bremsstrahlung beam stops and collimators in APS beamline stations.

    SciTech Connect (OSTI)

    Dooling, J.; Accelerator Systems Division

    2010-11-01

    The Monte Carlo radiation transport code MARS is used to model the generation of gas bremsstrahlung (GB) radiation from 7-GeV electrons which scatter from residual gas atoms in undulator straight sections within the Advanced Photon Source (APS) storage ring. Additionally, MARS is employed to model the interactions of the GB radiation with components along the x-ray beamlines and then determine the expected radiation dose-rates that result. In this manner, MARS can be used to assess the adequacy of existing shielding or the specifications for new shielding when required. The GB radiation generated in the 'thin-target' of an ID straight section will consist only of photons in a 1/E-distribution up to the full energy of the stored electron beam. Using this analytical model, the predicted GB power for a typical APS 15.38-m insertion device (ID) straight section is 4.59 x 10{sup -7} W/nTorr/mA, assuming a background gas composed of air (Z{sub eff} = 7.31) at room temperature (293K). The total GB power provides a useful benchmark for comparisons between analytical and numerical approaches. We find good agreement between MARS and analytical estimates for total GB power. The extended straight section 'target' creates a radial profile of GB, which is highly peaked centered on the electron beam. The GB distribution reflects the size of the electron beam that creates the radiation. Optimizing the performance of MARS in terms of CPU time per incident trajectory requires the use of a relatively short, high-density gas target (air); in this report, the target density is {rho}L = 2.89 x 10{sup -2} g/cm{sup 2} over a length of 24 cm. MARS results are compared with the contact dose levels reported in TB-20, which used EGS4 for radiation transport simulations. Maximum dose-rates in 1 cc of tissue phantom form the initial basis for comparison. MARS and EGS4 results are approximately the same for maximum 1-cc dose-rates and attenuation in the photon-dominated regions; for thicker targets, however, the dose-rate no longer depends only on photon attenuation, as photoneutrons (PNs) begin to dominate. The GB radiation-induced photoneutron measurements from four different metals (Fe, Cu, W, and Pb) are compared with MARS predictions. The simulated dose-rates for beamline 6-ID are approximately 3-5 times larger than the measured values, whereas those for beamline 11-ID are much closer. Given the uncertainty in local values of pressure and Z, the degree of agreement between MARS and the PN measurements is good. MARS simulations of GB-induced radiation in and around the FOE show the importance of using actual pressure and gas composition (Z{sub eff}) to obtain accurate PN dose. For a beam current of 300 mA, extrapolating pressure data measured in previously published studies predicts an average background gas pressure of 27 nTorr. An average atomic number of Z{sub eff} = 4.0 is obtained from the same studies. In addition, models of copper masks presently in use at the APS are included. Simulations show that inclusion of exit masks make significant differences in both the radiation spatial distribution within the FOE, as well as the peak intensity. Two studies have been conducted with MARS to assess shielding requirements. First, dose levels in contact with the outside wall of the FOE are examined when GB radiation strikes Pb or W beam stops of varying transverse size within the FOE. Four separate phantom regions are utilized to measure the dose, two at beam elevation and two at the horizontal beam position. The first two phantoms are used for scoring FOE dose along the outside and back walls, horizontally; the second two collect dose on the roof and vertically on the back wall. In all cases, the beam stop depth is maintained at 30 cm. Inclusion of front end (FE) exit masks typically cause a 1-2 order-of-magnitude increase in the dose-rates relative to the case with no masks. Masks place secondary bremsstrahlung sources inside the FOE, and therefore they must be shielded appropriately. The MARS model does not fully account for all shielding present

  4. What Curiosity in the Structure: The Hollow Earth in Science.

    E-Print Network [OSTI]

    Griffin, Duane

    , ancient and widespread. Earthquakes and volcanoes, karst swallow holes and sinkholes, springs, and wells

  5. developed and manufactured at the Laboratory, has enabled Curiosity,

    E-Print Network [OSTI]

    and Atomic Energy Commission (CEA, France), the European Commission Joint Research Centre behavior. It was hosted by the Atomic Weapons Establishment (AWE, United Kingdom), the Alternative Energies Administration of the U.S. Department of Energy under contract DE-AC52-06NA25396. LA-UR-13-26941 This publication

  6. Argonne programming camp sparks students' scientific curiosity | Argonne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications TraditionalWithAntiferromagnetic ArgonneTheRegistered2014HomeArgonne

  7. Yes, This is Rocket Science: EM Employee Eagerly Examines Curiosity,

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann Jackson About1996HowFOAShowingFuelWeatherize »EvePlant |MetLifeWorkshopXcelContinuing

  8. RTG-History, the Curiosity, Voyager, and New Horizons

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProton Delivery andInnovationsRSS Feed Los Alamos

  9. Powering Curiosity: Multi-Mission Radioisotope Thermoelectric Generators |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEYI/OPerformancePi Day PiSafetyContact

  10. THE MARS HOPPER: AN IMPULSE DRIVEN, LONG RANGE, LONG-LIVED MOBILE PLATFORM UTILIZING IN-SITU MARTIAN RESOURCES

    SciTech Connect (OSTI)

    Robert C. O'Brien; Mark McKay; Brian Gross; JOnathan Webb

    2001-09-01

    The requirements for performance by planetary exploration missions are increasing. Landing at a single location to take data is no longer sufficient. Due to the increasing cost, the missions that provide mobile platforms that can acquire data at displaced locations are becoming more attractive. Landers have also had limited range due to power limitations, limited lifetime of subsystems and the inability to negotiate rough terrain. The Center for Space Nuclear Research has designed an instrumented platform that can acquire detailed data at hundreds of locations during its lifetime - a Mars Hopper. The Mars Hopper concept utilizes energy from radioisotopic decay in a manner different from any existing radioisotopic power sources—as a thermal capacitor. By accumulating the heat from radioisotopic decay for long periods, the power of the source can be dramatically increased for short periods. Thus, a radioisotopic thermal rocket (RTR) is possible. The platform will be able to “hop” from one location to the next every 5-7 days with a separation of 5-10 km per hop. Each platform will weigh around 50 kgs unfueled which is the condition at deployment. Consequently, several platforms may be deployed on a single launch from Earth. With a lifetime estimated at 5-7 years, the entire surface of Mars can be mapped in detail by a couple dozen platforms. In addition, Hoppers can collect samples and deliver them to the Mars Science Laboratory for more detailed analysis. The design and performance of the Mars Hopper will be discussed.

  11. Volu m e lXXI I, N u m b e r 2, fall 2009 IN ThIs Issue

    E-Print Network [OSTI]

    Haile, Sossina M.

    on mars by MarCus y. woo having spent almost six years on the red planet, the mars rovers are proving the planet to run on com- pressed hydrogen. Put Some Sunlight in Your Tank The future's so bright they have-solar-fuel studies. by Douglas L. Smith You know what would be really cool? A gad- get that turns carbon dioxide

  12. Mars north polar dunes: possible formation from low-density sediment aggregates

    SciTech Connect (OSTI)

    Saunders, R.S.; Blewett, D.T.

    1987-10-01

    Low-density aggregates, composed of submicron clay aerosols, have been formed experimentally as the sublimation residues of masses of dust-nucleated ice. These ice-dust mixtures are possible analogues of materials of Martian north polar deposits. Low-density (0.002 g/cm/sup 3/) spheroidal pellets formed from these materials in wind tunnel experiments have been examined as possible candidates for forming north polar dunes on Mars. It is shown that these particles move like sand grains under conditions of saltation and, given a sufficient supply, would be capable of forming the dunes observed in the north circumpolar erg.

  13. MHK ISDB/Instruments/AirMar G2183 GPS Antenna | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas:Montezuma, Arizona:Oregon:LowellMHK ISDB/Instruments/ACM-WAVE-PLUSMHKMHKMHKMHKAirMar

  14. ChemCam on Mars (Technical Report) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnical Report: Achievements ofCOMPOSITION OF VAPORS FROM BOILINGChemCam on Mars Citation

  15. GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 16, doi:10.1002/grl.50415, 2013 The importance of pickup oxygen ion precipitation to the Mars upper

    E-Print Network [OSTI]

    Johnson, Robert E.

    by the fields in the solar wind. Ion precipitation and their impact on the Mars atmosphere has been extensively oxygen ion precipitation to the Mars upper atmosphere under extreme solar wind conditions Xiaohua Fang,1 to very important when upstream solar wind conditions vary from normal to extreme. The atmospheric

  16. Mars And Beyond: Human Spaceflight at the Museum of Science Boston Joseph Paul Cohen at the University of Massachuestts Boston, and Julia Sable at the Museum of Science Boston, and

    E-Print Network [OSTI]

    Ding, Wei

    on the Apollo and Orion missions, space suits, Mars settlement, and 3D printing (a technique for making needed

  17. Downloaded 22 Mar 2001 to 157.182.50.14. Redistribution subject to AIP copyright, see http://ojps.aip.org/chaos/chocr.jsp Downloaded 22 Mar 2001 to 157.182.50.14. Redistribution subject to AIP copyright, see http://ojps.aip.org/chaos/chocr.jsp

    E-Print Network [OSTI]

    Showalter, Kenneth

    Downloaded 22 Mar 2001 to 157.182.50.14. Redistribution subject to AIP copyright, see http://ojps.aip.org/chaos/chocr.jsp #12;Downloaded 22 Mar 2001 to 157.182.50.14. Redistribution subject to AIP copyright, see http://ojps.aip.org/chaos/chocr.jsp #12;Downloaded 22 Mar 2001 to 157.182.50.14. Redistribution subject to AIP copyright, see http

  18. Downloaded 08 Mar 2002 to 129.7.12.23. Redistribution subject to AIP license or copyright, see http://ojps.aip.org/japo/japcr.jsp Downloaded 08 Mar 2002 to 129.7.12.23. Redistribution subject to AIP license or copyright, see http://ojps.aip.org/japo/japcr

    E-Print Network [OSTI]

    Economou, Demetre J.

    Downloaded 08 Mar 2002 to 129.7.12.23. Redistribution subject to AIP license or copyright, see http://ojps.aip.org/japo/japcr.jsp #12;Downloaded 08 Mar 2002 to 129.7.12.23. Redistribution subject to AIP license or copyright, see to AIP license or copyright, see http://ojps.aip.org/japo/japcr.jsp #12;Downloaded 08 Mar 2002 to 129

  19. Computer Science Computer Science?

    E-Print Network [OSTI]

    Cafarella, Michael J.

    -M Programming, U-M Solar Car, Hybrid Racing, and the Mars Rover Team. Other groups that advance societal good. Michigan Hackers: Experimenting with technology gEECS: Girls in electrical engineering and computer science

  20. A low-alpha nuclear electric propulsion system for lunar and Mars missions

    SciTech Connect (OSTI)

    Coomes, E.P.; Dagle, J.E.

    1992-01-01

    The advantages of using electric propulsion are well-known in the aerospace community. The high specific impulse and, therefore, lower propellant requirements make it a very attractive propulsion option for the Space Exploration Initiative (SEI). Recent studies have shown that nuclear electric propulsion (NEP) is not only attractive for the transport of cargo but that fast piloted missions to Mars are possible as well, with alphas on the order of 7.5 kg/kW. An advanced NEP system with a specific power (alpha) of 2.5 kg/kW or less would significantly enhance the manned mission option of NEP by reducing the trip time even further. This paper describes an advanced system that combines the PEGASUS Drive with systems of the Rotating Multimegawatt Boiling Liquid Metal (RMBLR) power system that was developed as part of the DOE multimegawatt program and just recently declassified. In its original configuration, the PEGASUS Drive was a 10-MWe propulsion system. The RMBLR was a 20-MW electric system. By combining the two, a second-generation PEGASUS Drive can be developed with an alpha less than 2.5 kg/kW. This paper will address the technology advancements incorporated into the PEGASUS Drive, the analysis of a fast piloted mission and an unmanned cargo transport Mars mission, and the integration of laser power beaming to provide surface power.

  1. Extensibility of the fission surface power (FSP) system from the moon to Mars

    SciTech Connect (OSTI)

    Poston, David Irvin

    2011-01-28

    Fission reactors have great near-term potential to power human and robotic missions/outposts on the surface of the Moon and Mars (and potentially other planets, moons, and asteroids). The ability to provide a power-rich environment that is independent of solar intensity, nights, dust storms, etc., is of significant (perhaps enabling) importance to the further expansion of humans into our solar system. NASA's Reference Fission Surface Power (FSP) System is a 40 kWe system that has been primarily designed for lunar applications. This paper examines the extensibility of the FSP design and technology for potential missions on Mars. Possible impacts include the effects of changes in heat sink, gravity, day-night cycles, mission transit time, communication delay, and the chemistry of the regolith and atmosphere. One of the biggest impacts might be differences in the potential utilization of in-situ materials for shielding. Another major factor is that different missions will likely require different performance requirements, e.g. power, lifetime and mass. This paper concludes that the environmental differences between potential mission locations will not require significant changes in design and technologies, unless performance requirements for a specific mission are substantially different than those adopted for the FSP The primary basis for this conclusion is that the FSP has been designed with robust materials and design margins.

  2. Interactive Evolution of Multiple Water-Ice Reservoirs on Mars: Insights from Hydrogen Isotope Compositions

    E-Print Network [OSTI]

    Kurokawa, Hiroyuki; Sato, Masahiko

    2015-01-01

    Remote sensing data from orbiter missions have proposed that ground ice may currently exist on Mars, although the volume is still uncertain. Recent analyses of Martian meteorites have suggested that the water reservoirs have at least three distinct hydrogen isotope compositions (D/H ratios): primordial and high D/H ratios, which are approximately the same and six times that of ocean water on Earth, respectively, and a newly identified intermediate D/H ratio, which is approximately two to three times higher than that in ocean water on Earth. We calculate the evolution of the D/H ratios and the volumes of the water reservoirs on Mars by modeling the exchange of hydrogen isotopes between multiple water reservoirs and the atmospheric escape. The D/H ratio is slightly higher in the topmost thin surface-ice layer than that in the atmosphere because of isotopic fractionation by sublimation, whereas the water-ice reservoir just below the exchangeable topmost surface layer retains the intermediate D/H signature found ...

  3. Testing the Early Mars H2-CO2 Greenhouse Hypothesis with a 1-D Photochemical Model

    E-Print Network [OSTI]

    Batalha, Natasha; Ramirez, Ramses; Kasting, James

    2015-01-01

    A recent study by Ramirez et al. (2014) demonstrated that an atmosphere with 1.3-4 bar of CO2 and H2O, in addition to 5-20% H2, could have raised the mean annual and global surface temperature of early Mars above the freezing point of water. Such warm temperatures appear necessary to generate the rainfall (or snowfall) amounts required to carve the ancient martian valleys. Here, we use our best estimates for early martian outgassing rates, along with a 1-D photochemical model, to assess the conversion efficiency of CO, CH4, and H2S to CO2, SO2, and H2. Our outgassing estimates assume that Mars was actively recycling volatiles between its crust and interior, as Earth does today. H2 production from serpentinization and deposition of banded iron-formations is also considered. Under these assumptions, maintaining an H2 concentration of ~1-2% by volume is achievable, but reaching 5% H2 requires additional H2 sources or a slowing of the hydrogen escape rate below the diffusion limit. If the early martian atmosphere...

  4. mar015

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLosThe 26th AnnualHistoryM aterialsmFUSE: Functionmanaging the` [ ` [

  5. 05Mar09 ANALYSISIn crisis, GE finds its deep bench not so magical By James B. Kelleher

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    05Mar09 ANALYSISIn crisis, GE finds its deep bench not so magical By James B. Kelleher CHICAGO, March 5 (Reuters) Crotonville, we have a problem. The travails of General Electric Co GE and expensive training program credited with creating those managers. In recent weeks, GE executives have

  6. Flow in seagrass canopies: The influence of patch width Mark S. Fonseca*, M.A.R. Koehl

    E-Print Network [OSTI]

    Koehl, Mimi

    Flow in seagrass canopies: The influence of patch width Mark S. Fonseca*, M.A.R. Koehl Department published on the inter- action of seagrass canopies with flowing water has been derived from laboratory flume studies. The few studies that have been conducted all point to similar patterns of flow alteration

  7. arXiv:1103.0628v1[astro-ph.IM]3Mar2011 Bivariate least squares linear regression

    E-Print Network [OSTI]

    Masci, Frank

    arXiv:1103.0628v1[astro-ph.IM]3Mar2011 Bivariate least squares linear regression: towards a unified squares linear regression, the classical ap- proach pursued for functional models in earlier attempts are regression lines in the general case of correlated errors in X and in Y for heteroscedastic data

  8. NASA's newest Mars orbiter is a spacecraft designed to find out what the planet is made of,

    E-Print Network [OSTI]

    water and shallow buried ice and study the radiation environment. The surface of Mars has long been more fuel. Science Goals The orbiter mission will study and globally map the elemental composition measurements of the planet's radiation environ- ment that can be used to evaluate the potential health risks

  9. ccsd-00001341(version1):23Mar2004 Hanbury-Brown Twiss correlations to probe the population

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ccsd-00001341(version1):23Mar2004 Hanbury-Brown Twiss correlations to probe the population the first study of the statistics of GHz photons in quantum circuits, using Hanbury- Brown and Twiss experiment of Hanbury-Brown and Twiss (HBT)[1], consisted in two detec- tors correlating the power

  10. Talk to Inside-Outside Workshop, Senate House, Londond 10 Mar 2010 Workshop: Inside and Outside of Computers and Minds

    E-Print Network [OSTI]

    Sloman, Aaron

    Talk to Inside-Outside Workshop, Senate House, Londond 10 Mar 2010 Workshop: Inside and Outside with capabilities matching those of orangutans, corvids, human toddlers, and probably many other animals · will need. · We now, as a result of a great deal of work on hardware, software, firmware, and CS theory, know how

  11. Development of the Variable Atmosphere Testing Facility for Blow-Down Analysis of the Mars Hopper Prototype

    SciTech Connect (OSTI)

    Nathan D. Jerred; Robert C. O'Brien; Steven D. Howe; James E. O'Brien

    2013-02-01

    Recent developments at the Center for Space Nuclear Research (CSNR) on a Martian exploration probe have lead to the assembly of a multi-functional variable atmosphere testing facility (VATF). The VATF has been assembled to perform transient blow-down analysis of a radioisotope thermal rocket (RTR) concept that has been proposed for the Mars Hopper; a long-lived, long-ranged mobile platform for the Martian surface. This study discusses the current state of the VATF as well as recent blow-down testing performed on a laboratory-scale prototype of the Mars Hopper. The VATF allows for the simulation of Mars ambient conditions within the pressure vessel as well as to safely perform blow-down tests through the prototype using CO2 gas; the proposed propellant for the Mars Hopper. Empirical data gathered will lead to a better understanding of CO2 behavior and will provide validation of simulation models. Additionally, the potential of the VATF to test varying propulsion system designs has been recognized. In addition to being able to simulate varying atmospheres and blow-down gases for the RTR, it can be fitted to perform high temperature hydrogen testing of fuel elements for nuclear thermal propulsion.

  12. British Geomorphological Research Group, Annual Meeting, Oxford, 2003. An analysis and classification of 'barchan' dunes on Mars.

    E-Print Network [OSTI]

    Bourke, Mary C.

    and classification of 'barchan' dunes on Mars. Bourke, M.C., and Balme, M. School of Geography and the Environment, University of Oxford, Oxford, OX1 3TB, UK. Mary.bourke@geog.ox.ac.uk Martian sand dunes have the potential and morphodynamics. Recognition of the characteristics of both recent and ancient dunes is the first step towards

  13. Recent aeolian dune change on Mars M.C. Bourke a,b,, K.S. Edgett c

    E-Print Network [OSTI]

    Bourke, Mary C.

    Recent aeolian dune change on Mars M.C. Bourke a,b,, K.S. Edgett c , B.A. Cantor c a Planetary 2007 Abstract Previous comparisons of Martian aeolian dunes in satellite images have not detected any change in dune form or position. Here, we show dome dunes in the north polar region that shrank

  14. arXiv:0903.3329v1[cs.LG]19Mar2009 Optimal Policies Search for Sensor Management

    E-Print Network [OSTI]

    Del Moral , Pierre

    complex sensor(s)-based systems which supply the decision centers with an increasing amount of data) Radar to propose management scheme during the detection step. In [7]­[9] an information-based approacharXiv:0903.3329v1[cs.LG]19Mar2009 Optimal Policies Search for Sensor Management : Application

  15. The solar wind interaction with Mars: Recent progress and future directions The Sun has a powerful influence on planetary atmospheres.

    E-Print Network [OSTI]

    California at Berkeley, University of

    Editorial The solar wind interaction with Mars: Recent progress and future directions The Sun has field, because the solar wind can interact directly with the upper atmo- sphere. Neutral particles in the upper atmosphere are ionized by solar photons and through interactions with solar wind charged particles

  16. Problems #7, Math 311, Dr. M. Bohner. Mar 19, 2003. Due Apr 2, 1 pm. 138. Let A =

    E-Print Network [OSTI]

    Bohner, Martin

    Problems #7, Math 311, Dr. M. Bohner. Mar 19, 2003. Due Apr 2, 1 pm. 138. Let A = a b b c . Show by f(x, y, z) = (x2 +2y2 )e-(x2+y2) +zez . 147. In order to produce a box we have two materials

  17. On the Semiclassical Jacobi Algorithm \\Lambda Mar'ia T. C'amara and Domingo Gim'enez y

    E-Print Network [OSTI]

    Giménez, Domingo

    Chapter 1 On the Semiclassical Jacobi Algorithm \\Lambda Mar'ia T. C'amara and Domingo Gim'enez y Abstract In this paper a new Jacobi method to solve the symmetric eigenvalue problem is presented Jacobi methods. By combining this method with an adequate threshold strategy a reduction in the execution

  18. MGS MAG/ER observations at the magnetic pileup boundary of Mars: draping enhancement and low frequency waves

    E-Print Network [OSTI]

    California at Berkeley, University of

    MGS MAG/ER observations at the magnetic pileup boundary of Mars: draping enhancement and low Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA Received 26 November 2002; received in revised form 19 March 2003; accepted 24 April 2003 Abstract The magnetic pileup boundary (MPB) is a sharp

  19. Received 7 Dec 2013 | Accepted 11 Feb 2014 | Published 4 Mar 2014 Radial-arrayed rotary electrification for high

    E-Print Network [OSTI]

    Wang, Zhong L.

    ARTICLE Received 7 Dec 2013 | Accepted 11 Feb 2014 | Published 4 Mar 2014 Radial-arrayed rotary of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA (TEG) for producing energy from rotary surfaces with unprece- dented performance. Enabled by a design

  20. Received 5 Mar 2014 | Accepted 11 Jul 2014 | Published 18 Aug 2014 Sea surface temperature contributes to marine

    E-Print Network [OSTI]

    Benton, Michael

    ARTICLE Received 5 Mar 2014 | Accepted 11 Jul 2014 | Published 18 Aug 2014 Sea surface temperature,3 & Michael J. Benton1 During the Mesozoic and Cenozoic, four distinct crocodylomorph lineages colonized most probably ectothermic reptiles, these lineages colonized the marine realm and diversified during

  1. Received 2 Oct 2014 | Accepted 2 Feb 2015 | Published 12 Mar 2015 IL-23-mediated mononuclear phagocyte crosstalk

    E-Print Network [OSTI]

    ARTICLE Received 2 Oct 2014 | Accepted 2 Feb 2015 | Published 12 Mar 2015 IL-23-mediated mononuclear phagocyte crosstalk protects mice from Citrobacter rodentium-induced colon immunopathology Tegest that colonic CX3CR1þ mononuclear phagocytes are critical inducers of the innate response to Citrobacter

  2. Bull Mar Sci. 90(3):781794. 2014 http://dx.doi.org/10.5343/bms.2013.1056

    E-Print Network [OSTI]

    Durako, Michael J.

    Bull Mar Sci. 90(3):781­794. 2014 http://dx.doi.org/10.5343/bms.2013.1056 781Bulletin of Marine.e., it rapidly colonizes disturbance or gap areas, but does not hold its ground; Kenworthy 1997, Dean and Durako

  3. Stratigraphy and structure of interior layered deposits in west Candor Chasma, Mars, from High Resolution Stereo Camera (HRSC) stereo

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Stratigraphy and structure of interior layered deposits in west Candor Chasma, Mars, from High the stratigraphy of two adjacent mounds. Layering tends to dip in the same direction as the local topographic slope rotations. The stratigraphy of two adjacent mounds correlates, but the thicknesses of the units differ. Most

  4. Pre-4.0 billion year weathering on Mars constrained by RbSr geochronology on meteorite ALH84001

    E-Print Network [OSTI]

    Johnson, Clark M.

    Pre-4.0 billion year weathering on Mars constrained by Rb­Sr geochronology on meteorite ALH84001 Accepted 24 October 2012 Editor: T. Elliott Available online 22 November 2012 Keywords: geochronology Sr crystallization age of this meteorite has been debated, where initial Sm­Nd geochronology by Nyquist et al. (1995

  5. arXiv:1003.1143v1[nucl-th]4Mar2010 Nuclear energy density functional from chiral

    E-Print Network [OSTI]

    Weise, Wolfram

    arXiv:1003.1143v1[nucl-th]4Mar2010 Nuclear energy density functional from chiral pion energy density functional approach is the many-body method of choice in order to calculate the properties nuclear energy density functional [10, 11, 12] focusses less on the fitting of experimental data

  6. Cloning, expression, crystallization and preliminary X-ray analysis of a putative multiple antibiotic resistance repressor protein (MarR) from Xanthomonas campestris

    SciTech Connect (OSTI)

    Tu, Zhi-Le; Li, Juo-Ning; Chin, Ko-Hsin; Chou, Chia-Cheng; Lee, Cheng-Chung; Shr, Hui-Lin; Lyu, Ping-Chiang; Gao, Fei Philip; Wang, Andrew H.-J.; Chou, Shan-Ho

    2005-07-01

    A putative repressor for the multiple antibiotic resistance operon from a plant pathogen X. campestris pv. campestris has been overexpressed in E. coli, purified and crystallized. The crystals diffracted to 2.3 Å with good quality. The multiple antibiotic resistance operon (marRAB) is a member of the multidrug-resistance system. When induced, this operon enhances resistance of bacteria to a variety of medically important antibiotics, causing a serious global health problem. MarR is a marR-encoded protein that represses the transcription of the marRAB operon. Through binding with salicylate and certain antibiotics, however, MarR can derepress and activate the marRAB operon. In this report, the cloning, expression, crystallization and preliminary X-ray analysis of XC1739, a putative MarR repressor protein present in the Xanthomonas campestris pv. campestris, a Gram-negative bacterium causing major worldwide disease of cruciferous crops, are described. The XC1739 crystals diffracted to a resolution of at least 1.8 Å. They are orthorhombic and belong to space group P2{sub 1}2{sub 1}2{sub 1}, with unit-cell parameters a = 39.5, b = 54.2 and c = 139.5 Å, respectively. They contain two molecules in the asymmetric unit from calculation of the self-rotation function.

  7. Difference in the wind speeds required for initiation versus continuation of sand transport on Mars: Implications for dunes and dust storms

    E-Print Network [OSTI]

    Kok, Jasper F

    2010-01-01

    Much of the surface of Mars is covered by dunes, ripples, and other features formed by the blowing of sand by wind, known as saltation. In addition, saltation loads the atmosphere with dust aerosols, which dominate the Martian climate. We show here that saltation can be maintained on Mars by wind speeds an order of magnitude less than required to initiate it. We further show that the resulting hysteresis effect causes saltation to occur for much lower wind speeds than previously thought. These findings have important implications for the formation of dust storms, sand dunes, and ripples on Mars.

  8. Simulation of the output power of copper bromide lasers by the MARS method

    SciTech Connect (OSTI)

    Iliev, I P; Voynikova, D S; Gocheva-Ilieva, S G

    2012-04-30

    The dependence of the output power of CuBr lasers (operating at wavelengths of 510.6 and 578.2 nm) on ten input physical parameters has been statistically analysed based on a large amount of experimental data accumulated for these lasers. Regression models have been built using the flexible nonparametric method of multivariate adaptive regression splines (MARS) to describe both linear and nonlinear local dependences. These models cover more than 97% initial data with an error comparable with the experimental error; they are applied to estimate and predict the output powers of both existing and future lasers. The advantage of the models constructed for estimating laser parameters over the standard parametric methods of multivariate factor and regression analysis is demonstrated.

  9. Improving the performance of MARS reservoir simulator on Cray-2 supercomputer

    SciTech Connect (OSTI)

    Li, K.G.; Dogru, A.H.; McDonald, A.E.; Merchant, A.R.; Al-Mulhem, A.A.; Al-Ruwaili, S.B.; Sobh, N.A.; Al-Sunaidi, H.A.

    1995-10-01

    The computational efficiency of a reservoir simulator-MARS-that is heavily used in Saudi Aramco, was significantly enhanced by improving the vectorization, parallelization and a key algorithm of the simulator. In particular, a state-of-the-art parallel linear equation solver was developed and implemented in the simulator. This new solver ran three to five times faster than the existing solvers. With the new solver and the other improvements in the simulator, the optimized code ran 1.3 to 1.8 times faster than the original code on a single processor and more than four times faster on four processors of Cray-2 supercomputer for typical Saudi Aramco reservoir models. This translates into great savings for the company since it, in effect, creates additional computational resources at no additional cost and improves the reservoir engineer`s productivity by shortening the job turnaround time.

  10. Construction and Testing of a Low-power Cryostat for MARS

    SciTech Connect (OSTI)

    Aalseth, Craig E.; Caggiano, Joseph A.; Day, Anthony R.; Fast, James E.; Fuller, Erin S.

    2007-10-01

    A low-power cryostat was designed and built for the Multi-sensor Airborne Radiation Survey (MARS) project for the purpose of housing a close-packed high-purity germanium (HPGe) detector array of 14 HPGe detectors. The power consumption of the cold mass in the cryostat was measured to be 4.07(11) watts, sufficient for 5.5 days of continuous operation using only 8 liters of liquid nitrogen. Temperatures throughout the cryostat were measured by platinum resistance temperature detectors. These measurements were used to determine the emissivity of the copper used in the floating radiation shield and outer cryostat wall, which was constructed using chemically cleaned and passivated copper metal. Using a PNNL-developed passivation process, an emissivity of 2.5(3)% was achieved for copper.

  11. Thermal creep assisted dust lifting on Mars: Wind tunnel experiments for the entrainment threshold velocity

    E-Print Network [OSTI]

    Küpper, Markus

    2015-01-01

    In this work we present laboratory measurements on the reduction of the threshold friction velocity necessary for lifting dust if the dust bed is illuminated. Insolation of a porous soil establishes a temperature gradient. At low ambient pressure this gradient leads to thermal creep gas flow within the soil. This flow leads to a sub-surface overpressure which supports lift imposed by wind. The wind tunnel was run with Mojave Mars Simulant and air at 3, 6 and 9 mbar, to cover most of the pressure range at martian surface levels. Our first measurements imply that the insolation of the martian surface can reduce the entrainment threshold velocity between 4 % and 19 % for the conditions sampled with our experiments. An insolation activated soil might therefore provide additional support for aeolian particle transport at low wind speeds.

  12. Downloaded 14 Mar 2006 to 171.64.124.26. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp Downloaded 14 Mar 2006 to 171.64.124.26. Redistribution subject to AIP license or copyright, see http://jcp.aip.org/jcp/c

    E-Print Network [OSTI]

    Downloaded 14 Mar 2006 to 171.64.124.26. Redistribution subject to AIP license or copyright, see subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp #12;Downloaded 14 Mar 2006 to 171.64.124.26. Redistribution subject to AIP license or copyright, see http

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    E-Print Network [OSTI]

    Umstadter, Donald

    Downloaded 19 Mar 2003 to 141.213.19.32. Redistribution subject to AIP license or copyright, see.213.19.32. Redistribution subject to AIP license or copyright, see http://proceedings.aip.org/proceedings/cpcr.jsp #12;Downloaded 19 Mar 2003 to 141.213.19.32. Redistribution subject to AIP license or copyright, see http

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    E-Print Network [OSTI]

    Berry, R. Stephen

    Downloaded 20 Mar 2004 to 128.135.233.250. Redistribution subject to AIP license or copyright, see subject to AIP license or copyright, see http://jap.aip.org/jap/copyright.jsp #12;Downloaded 20 Mar 2004 to 128.135.233.250. Redistribution subject to AIP license or copyright, see http

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    E-Print Network [OSTI]

    Sprott, Julien Clinton

    Downloaded 29 Mar 2004 to 128.104.223.199. Redistribution subject to AIP license or copyright, see subject to AIP license or copyright, see http://pof.aip.org/pof/copyright.jsp #12;Downloaded 29 Mar 2004 to 128.104.223.199. Redistribution subject to AIP license or copyright, see http

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    E-Print Network [OSTI]

    Berthier, Ludovic

    Downloaded 06 Mar 2009 to 128.135.186.78. Redistribution subject to AIP license or copyright; see.135.186.78. Redistribution subject to AIP license or copyright; see http://proceedings.aip.org/proceedings/cpcr.jsp #12;Downloaded 06 Mar 2009 to 128.135.186.78. Redistribution subject to AIP license or copyright; see http

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    E-Print Network [OSTI]

    Berry, R. Stephen

    Downloaded 15 Mar 2004 to 128.135.233.250. Redistribution subject to AIP license or copyright, see subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp #12;Downloaded 15 Mar 2004 to 128.135.233.250. Redistribution subject to AIP license or copyright, see http

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    E-Print Network [OSTI]

    Berry, R. Stephen

    Downloaded 22 Mar 2004 to 128.135.233.250. Redistribution subject to AIP license or copyright, see subject to AIP license or copyright, see http://jap.aip.org/jap/copyright.jsp #12;Downloaded 22 Mar 2004 to 128.135.233.250. Redistribution subject to AIP license or copyright, see http

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    E-Print Network [OSTI]

    Berry, R. Stephen

    Downloaded 20 Mar 2004 to 128.135.233.250. Redistribution subject to AIP license or copyright, see subject to AIP license or copyright, see http://jcp.aip.org/jcp/copyright.jsp #12;Downloaded 20 Mar 2004 to 128.135.233.250. Redistribution subject to AIP license or copyright, see http

  20. The Mars Hopper: Development, Simulation and Experimental Validation of a Radioisotope Exploration Probe for the Martian Surface

    SciTech Connect (OSTI)

    Nathan D. Jerred; Spencer Cooley; Robert C. O'Brien; Steven D. Howe; James E. O'Brien

    2012-09-01

    An advanced exploration probe has been proposed by the Center for Space Nuclear Research (CSNR) to acquire detailed data from the Martian surface and subsurface, ‘hop’ large distances to multiple sites in short periods of time and perform this task repeatedly. Although several similar flying vehicles have been proposed utilizing various power sources and complex designs, e.g. solar-electric and chemical-based, the CSNR’s Mars Hopper is based on a radioisotope thermal rocket (RTR) concept. The Mars Hopper’s design relies on the high specific energies [J/kg] of radioisotopes and enhances their low specific power [W/kg] through the use of a thermal capacitance material to store thermal energy over time. During operation, the RTR transfers the stored thermal energy to a flowing gas, which is then expanded through a converging-diverging nozzle, producing thrust. Between flights, the platform will have ample time to perform in-depth science at each location while the propellant tanks and thermal capacitor recharge. Recharging the propellant tanks is accomplished by sublimation freezing of the ambient CO2 atmosphere with a cryocooler, followed by heating and pressurization to yield a liquid storage state. The proposed Mars Hopper will undergo a ballistic flight, consuming the propellant in both ascent and descent, and by using multiple hopper platforms, information can be gathered on a global scale, enabling better resource resolution and providing valuable information for a possible Mars sample-return mission. The CSNR, collaborating with the Idaho National Laboratory (INL) and three universities (University of Idaho, Utah State University and Oregon State University), has identified key components and sub-systems necessary for the proposed hopper. Current project activities include the development of a lab-scale prototypic Mars Hopper and test facility, along with computational fluid dynamics (CFD)/thermal-hydraulic models to yield a better understanding of the heat transfer process and complex nature of turbulent CO2 flow. Laboratory experimentation will aid design iterations and the development of both tethered and free-flying terrestrial hoppers that utilize an electrically heated core. The knowledge base acquired from these activities will refine the Mars Hopper’s future performance and optimize the RTR core components prior to constructing the final design.

  1. Managing by passion, professionalism and performance : the MBP³ model : an alternative management framework developed for the Instituto de Ciencias Terra-Mar (ICTM)

    E-Print Network [OSTI]

    Coelho, Alexandre C. (Alexandre Costa)

    2007-01-01

    The objective of this thesis is to develop a new, tailor-made and innovative managerial framework for the Instituto de Ciencias Terra-Mar (ICTM). The ICTM is a multi-functional science and technology institute dedicated ...

  2. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Mar. 2011, p. 16911697 Vol. 77, No. 5 0099-2240/11/$12.00 doi:10.1128/AEM.02240-10

    E-Print Network [OSTI]

    Cotty, Peter J.

    APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Mar. 2011, p. 1691­1697 Vol. 77, No. 5 0099 contact and prior to either germ tube emergence or host colonization. This suggests the timing of host

  3. ANTIMICROBIAL AGENTS AND CHEMOTHERAPY, Mar. 2011, p. 10361044 Vol. 55, No. 3 0066-4804/11/$12.00 doi:10.1128/AAC.01319-10

    E-Print Network [OSTI]

    ANTIMICROBIAL AGENTS AND CHEMOTHERAPY, Mar. 2011, p. 1036­1044 Vol. 55, No. 3 0066 antiviral response to colonize its host cells (23). Therefore, an alternative approach to inhibiting HCV

  4. JOURNAL OF BACTERIOLOGY, Mar. 2009, p. 19411950 Vol. 191, No. 6 0021-9193/09/$08.00 0 doi:10.1128/JB.00601-08

    E-Print Network [OSTI]

    Chattopadhyay, Sujay

    JOURNAL OF BACTERIOLOGY, Mar. 2009, p. 1941­1950 Vol. 191, No. 6 0021-9193/09/$08.00 0 doi:10 commensal colonization of mucosal surfaces in humans and other animals (1). Several studies have reported K

  5. doi:10.1152/ajpregu.00824.2005 291:307-314, 2006. First published Mar 23, 2006;Am J Physiol Regulatory Integrative Comp Physiol

    E-Print Network [OSTI]

    Murphy, Anne Z.

    doi:10.1152/ajpregu.00824.2005 291:307-314, 2006. First published Mar 23, 2006;Am J Physiol the vmr in both groups without affecting colonic compliance. However, morphine was sig- nificantly more

  6. United States Patent [19] [11] Patent Number: 4,817,182 Adelson et al. [45] Date of Patent: Mar. 28, 1989

    E-Print Network [OSTI]

    Adelson, Edward

    United States Patent [19] [11] Patent Number: 4,817,182 Adelson et al. [45] Date of Patent: Mar. 28; 364/723-725, 728 [56] References Cited U.S. PATENT DOCUMENTS 4,455,649 6/1984 Esteban et al for the secceeding analysis procedure. 9 Claims, 4 Drawing Sheets #12;U.S. Patent Mar. 28, 1989 Sheet 1 of 4 4

  7. Wind measurements in Mars' middle atmosphere at equinox and solstice: IRAM Plateau de Bure interferometric CO observations

    E-Print Network [OSTI]

    Moreno, R; Encrenaz, T; Forget, F; Chassefière, E; Hourdin, F; Guilloteau, S; Guilloteau, St\\'{e}phane

    2007-01-01

    Characterizing the Martian atmosphere is an essential objective to understand its meteorology and its climate. The lower atmosphere (< 40 km) and middle atmosphere (40-80 km) of Mars appear dynamically coupled at much higher levels than in the case of the Earth. The vertical extension of the weather phenomena is considerable with for example Hadley's cells reaching the top of the neutral atmosphere (120 km). The circulation in the middle atmosphere modifies the meteorology of the lower atmosphere, affecting the transport and climatic processes Observations of the CO rotational lines at millimeter (mm) wavelengths (Clancy et al 1990) have strongly contributed in the study of the vertical distribution of this compound and the thermal profile in the atmosphere of Mars over 0-70 km. Singledish observations of the CO Doppler lineshift have allowed direct wind measurements in the martian middle atmosphere near 50 km altitude (Lellouch et al 1991), but at a low spatial resolution (12'') enabling only an essential...

  8. Use of High-Power Brayton Nuclear Electric Propulsion (NEP) for a 2033 Mars Round-Trip Mission

    SciTech Connect (OSTI)

    McGuire, Melissa L. [Space Propulsion and Mission Analysis Office (Code: PBM), NASA Glenn Research Center, MS 500-103, 21000 Brookpark Rd., Cleveland, Ohio 44135 (United States); Martini, Michael C.; Packard, Thomas W. [Space Propulsion and Mission Analysis Office (Code: PBM), NASA Glenn Research Center, MS 500-103, 21000 Brookpark Rd., Cleveland, Ohio 44135 (United States); Analex Corporation, 1100 Apollo Drive, Brook Park, OH 44142 (United States); Weglian, John E. [Space Propulsion and Mission Analysis Office (Code: PBM), NASA Glenn Research Center, MS 500-103, 21000 Brookpark Rd., Cleveland, Ohio 44135 (United States); Ohio Aerospace Institute, 22800 Cedar Point Rd., Brook Park, OH 44142 (United States); Gilland, James H. [Ohio Aerospace Institute, 22800 Cedar Point Rd., Brook Park, OH 44142 (United States)

    2006-01-20

    The Revolutionary Aerospace Systems Concepts (RASC) team, led by the NASA Langley Research Center, is tasked with exploring revolutionary new approaches to enabling NASA to achieve its strategic goals and objectives in future missions. This paper provides the details from the 2004-2005 RASC study of a point-design that uses a high-power nuclear electric propulsion (NEP) based space transportation architecture to support a manned mission to Mars. The study assumes a high-temperature liquid-metal cooled fission reactor with a Brayton power conversion system to generate the electrical power required by magnetoplasmadynamic (MPD) thrusters. The architecture includes a cargo vehicle with an NEP system providing 5 MW of electrical power and a crewed vehicle with an NEP system with two reactors providing a combined total of 10 MW of electrical power. Both vehicles use a low-thrust, high-efficiency (5000 sec specific impulse) MPD system to conduct a spiral-out of the Earth gravity well, a low-thrust heliocentric trajectory, and a spiral-in at Mars with arrival late in 2033. The cargo vehicle carries two moon landers to Mars and arrives shortly before the crewed vehicle. The crewed vehicle and cargo vehicle rendezvous in Mars orbit and, over the course of the 60-day stay, the crew conducts nine-day excursions to Phobos and Deimos with the landers. The crewed vehicle then spirals out of Martian orbit and returns via a low-thrust trajectory to conduct an Earth flyby. The crew separates from the vehicle prior to Earth flyby and aerobrakes for a direct-entry landing.

  9. Origin of upper Bell Canyon Reservoir Sandstones (Guadalupian), El Mar and Paduca Fields, Southeast New Mexico and West Texas 

    E-Print Network [OSTI]

    Weinmeister, Marcus Paul

    1978-01-01

    and into the Delaware Basin. A turbidite origin is supported by the ordered sequence of sedimentary structures of the sandstones and stratigraphic evidence which shows that Upper Bell Canyon sedimentation occurred in a water depth of at least 1500 ft. Texture... units, Paduca field. 32 Frequency of bed divisions in Ramsey Sandstone cores. 43 ix LIST OF FIGURES Figure Page Regional map of Delaware Basin showing structure on top of Bell Canyon Formation and locations of Paduca and El Mar fields. North...

  10. Microsoft PowerPoint - 15.1025_Bosco_PM Workshop Mar15_2010 | Department of

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties - WAPAEnergy May 28Mar [Compatibility Mode] |HUMAN

  11. A nonsteady one-dimensional theoretical model of Mars' neutral atmospheric composition between 30 and 200 km

    SciTech Connect (OSTI)

    Rodrigo, R.; Garcia-Alvarez, E.; Lopez-Gonzalez, M.J.; Lopez-Moreno, J.J. (Instituto de Astrofisica de Andalucia, Granada (Spain))

    1990-08-30

    There has been a big advance in the knowledge of the composition of the atmosphere of the planet Mars since its exploration by different missions in the 1970s, and this will be deeply increased in the following years as the upcoming programs to Mars develop. In this context, the authors have elaborated a model of the Mars' neutral atmosphere including the following compounds: O({sup 3}P), O({sup 1}D), O{sub 2}, O{sub 3}, H, H{sub 2}, OH, H{sub 2}O, HO{sub 2}, H{sub 2}O{sub 2}, CO, and CO{sub 2}, between 30 and 200 km of altitude. The model is carried out for middle latitudes in equinox conditions and with moderate solar activity and provides the day-to-night evolution of the atmosphere. The scarcity of observations corresponding to the nightside of the planet has made it necessary to calculate the atmospheric temperature profile based on the available observations and on theoretical estimations. The model includes a detailed treatment of both the photochemical and the dynamical processes. In this sense, the most recent values of the reaction rates and photodissociation cross sections have been used, and a new height profile of the eddy diffusion coefficient has been computed which is able to explain the vertical distribution of carbon monoxide. The concentration profiles obtained show, in general, a very good agreement with the available experimental measurements.

  12. The radiation stability of glycine in solid CO2 - in situ laboratory measurements with applications to Mars

    E-Print Network [OSTI]

    Gerakines, P A

    2015-01-01

    The detection of biologically important, organic molecules on Mars is an important goal that may soon be reached. However, the current small number of organic detections at the Martian surface may be due to the harsh UV and radiation conditions there. It seems likely that a successful search will require probing the subsurface of Mars, where penetrating cosmic rays and Solar energetic particles dominate the radiation environment, with an influence that weakens with depth. Toward the goal of understanding the survival of organic molecules in cold radiation-rich environments on Mars, we present new kinetics data on the radiolytic destruction of glycine diluted in frozen carbon dioxide. Rate constants were measured in situ with infrared spectroscopy, without additional sample manipulation, for irradiations at 25, 50, and 75 K with 0.8-MeV protons. The resulting half-lives for glycine in CO2-ice are compared to previous results for glycine in H2O-ice and show that glycine in CO2-ice is much less stable in a radia...

  13. N-body simulations of oligarchic growth of Mars: Implications for Hf-W chronology

    E-Print Network [OSTI]

    Morishima, Ryuji; Samuel, Henri

    2013-01-01

    Dauphas and Pourmand (2011) [Nature 473, 489--492] estimated the accretion timescale of Mars to be 1.8 $^{+0.9}_{-1.0}$ Myr from the W isotopes of martian meteorites. This timescale was derived assuming perfect metal-silicate equilibration between the impactor and the target's mantle. However, in the case of a small impactor most likely only a fraction of the target's mantle is involved in the equilibration, while only a small part of the impactor's core equilibrates in the case of a giant impact. We examined the effects of imperfect equilibration using results of high-resolution $N$-body simulations for the oligarchic growth stage. These effects were found to be small as long as a planetary embryo has a deep liquid magma ocean during its accretion. The effect due to partial involvement of the target's mantle in equilibration is small due to the low metal-silicate partition coefficient for W suggested from the low Hf/W ratio of the martian mantle. The effect due to partial involvement of the impactor's core i...

  14. Extension of the quantum-kinetic model to lunar and Mars return physics

    SciTech Connect (OSTI)

    Liechty, D. S.; Lewis, M. J.

    2014-02-15

    The ability to compute rarefied, ionized hypersonic flows is becoming more important as missions such as Earth reentry, landing high-mass payloads on Mars, and the exploration of the outer planets and their satellites are being considered. A recently introduced molecular-level chemistry model, the quantum-kinetic, or Q-K, model that predicts reaction rates for gases in thermal equilibrium and non-equilibrium using only kinetic theory and fundamental molecular properties, is extended in the current work to include electronic energy level transitions and reactions involving charged particles. Like the Q-K procedures for neutral species chemical reactions, these new models are phenomenological procedures that aim to reproduce the reaction/transition rates but do not necessarily capture the exact physics. These engineering models are necessarily efficient due to the requirement to compute billions of simulated collisions in direct simulation Monte Carlo (DSMC) simulations. The new models are shown to generally agree within the spread of reported transition and reaction rates from the literature for near equilibrium conditions.

  15. Terrestrial Planet Formation Constrained by Mars and the Structure of the Asteroid Belt

    E-Print Network [OSTI]

    Izidoro, André; Morbidelli, Alessandro; Winter, Othon C

    2015-01-01

    Reproducing the large Earth/Mars mass ratio requires a strong mass depletion in solids within the protoplanetary disk between 1 and 3 AU. The Grand Tack model invokes a specific migration history of the giant planets to remove most of the mass initially beyond 1 AU and to dynamically excite the asteroid belt. However, one could also invoke a steep density gradient created by inward drift and pile-up of small particles induced by gas-drag, as has been proposed to explain the formation of close-in super Earths. Here we show that the asteroid belt's orbital excitation provides a crucial constraint against this scenario for the Solar System. We performed a series of simulations of terrestrial planet formation and asteroid belt evolution starting from disks of planetesimals and planetary embryos with various radial density gradients and including Jupiter and Saturn on nearly circular and coplanar orbits. Disks with shallow density gradients reproduce the dynamical excitation of the asteroid belt by gravitational s...

  16. Benchmarking Heavy Ion Transport Codes FLUKA, HETC-HEDS MARS15, MCNPX, and PHITS

    SciTech Connect (OSTI)

    Ronningen, Reginald Martin [Michigan State University; Remec, Igor [Oak Ridge National Laboratory; Heilbronn, Lawrence H. [University of Tennessee-Knoxville

    2013-06-07

    Powerful accelerators such as spallation neutron sources, muon-collider/neutrino facilities, and rare isotope beam facilities must be designed with the consideration that they handle the beam power reliably and safely, and they must be optimized to yield maximum performance relative to their design requirements. The simulation codes used for design purposes must produce reliable results. If not, component and facility designs can become costly, have limited lifetime and usefulness, and could even be unsafe. The objective of this proposal is to assess the performance of the currently available codes � PHITS, FLUKA, MARS15, MCNPX, and HETC-HEDS � that could be used for design simulations involving heavy ion transport. We plan to access their performance by performing simulations and comparing results against experimental data of benchmark quality. Quantitative knowledge of the biases and the uncertainties of the simulations is essential as this potentially impacts the safe, reliable and cost effective design of any future radioactive ion beam facility. Further benchmarking of heavy-ion transport codes was one of the actions recommended in the �Report of the 2003 RIA R&D Workshop".

  17. Design, qualification and operation of nuclear rockets for safe Mars missions

    SciTech Connect (OSTI)

    Buden, D.; Madsen, W.W.; Olson, T.S. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Redd, L.R. (USDOE Idaho Field Office, Idaho Falls, ID (United States))

    1993-01-01

    Nuclear thermal propulsion modules planned for use on crew missions to Mars improve mission reliability and overall safety of the mission. This, as well as all other systems, are greatly enhanced if the system specifications take into account safety from design initiation, and operational considerations are well thought through and applied. For instance, the use of multiple engines in the propulsion module can lead to very high system safety and reliability. Operational safety enhancements may include: the use of multiple perigee burns, thus allowing time to ensure that all systems are functioning properly prior to departure from Earth orbit; the ability to perform all other parts of the mission in a degraded mode with little or no degradation of the mission; and the safe disposal of the nuclear propulsion module in a heliocentric orbit out of the ecliptic plane. The standards used to qualify nuclear rockets are one of the main cost drivers of the program. Concepts and systems that minimize cost and risk will rely on use of the element and component levels to demonstrate technology readiness and validation. Subsystem or systems testing then is only needed for verification of performance. Also, these will be the safest concepts because they will be more thoroughly understood and the safety margins will be well established and confirmed by tests.

  18. Design, qualification and operation of nuclear rockets for safe Mars missions

    SciTech Connect (OSTI)

    Buden, D.; Madsen, W.W.; Olson, T.S. [EG and G Idaho, Inc., Idaho Falls, ID (United States); Redd, L.R. [USDOE Idaho Field Office, Idaho Falls, ID (United States)

    1993-04-01

    Nuclear thermal propulsion modules planned for use on crew missions to Mars improve mission reliability and overall safety of the mission. This, as well as all other systems, are greatly enhanced if the system specifications take into account safety from design initiation, and operational considerations are well thought through and applied. For instance, the use of multiple engines in the propulsion module can lead to very high system safety and reliability. Operational safety enhancements may include: the use of multiple perigee burns, thus allowing time to ensure that all systems are functioning properly prior to departure from Earth orbit; the ability to perform all other parts of the mission in a degraded mode with little or no degradation of the mission; and the safe disposal of the nuclear propulsion module in a heliocentric orbit out of the ecliptic plane. The standards used to qualify nuclear rockets are one of the main cost drivers of the program. Concepts and systems that minimize cost and risk will rely on use of the element and component levels to demonstrate technology readiness and validation. Subsystem or systems testing then is only needed for verification of performance. Also, these will be the safest concepts because they will be more thoroughly understood and the safety margins will be well established and confirmed by tests.

  19. IMPACT ORIGIN OF SEDIMENTS AT THE OPPORTUNITY LANDING SITE L. Paul Knauth1

    E-Print Network [OSTI]

    IMPACT ORIGIN OF SEDIMENTS AT THE OPPORTUNITY LANDING SITE ON MARS L. Paul Knauth1 , Donald M. Burt, Tempe, Arizona 85287-1404, USA. 2 Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA. Mars Exploration Rover Opportunity discovered sediments with layered

  20. Autonomous Robots 14, 103126, 2003 c 2003 Kluwer Academic Publishers. Manufactured in The Netherlands.

    E-Print Network [OSTI]

    Huntsberger, Terry

    of the Mars surface environment to sustain a permanent human- robotic colonized presence. Thus, institutions in The Netherlands. Planetary Rover Developments Supporting Mars Exploration, Sample Return and Future Human-Robotic Colonization PAUL S. SCHENKER, TERRY L. HUNTSBERGER, PAOLO PIRJANIAN, ERIC T. BAUMGARTNER AND EDDIE TUNSTEL Jet

  1. Solar X-ray Flare Hazards on the Surface of Mars

    E-Print Network [OSTI]

    David S. Smith; John M. Scalo

    2006-10-03

    Putative organisms on the Martian surface would be exposed to potentially high doses of ionizing radiation during strong solar X-ray flares. We extrapolate the observed flare frequency-energy release scaling relation to releases much larger than seen so far for the sun, an assumption supported by observations of flares on other solar- and subsolar-mass main sequence stars. We calculate the surficial reprocessed X-ray spectra using a Monte Carlo code we have developed. Biological doses from indirect genome damage are calculated for each parameterized flare spectrum by integration over the X-ray opacity of water. We estimate the mean waiting time for solar flares producing a given biological dose of ionizing radiation on Mars and compare with lethal dose data for a wide range of terrestrial organisms. These timescales range from decades for significant human health risk to 0.5 Myr for D. radiodurans lethality. Such doses require total flare energies of 10^33--10^38 erg, the lower range of which has been observed for other stars. Flares are intermittent bursts, so acute lethality will only occur on the sunward hemisphere during a sufficiently energetic flare, unlike low-dose-rate, extended damage by cosmic rays. We estimate the soil and CO_2 ice columns required to provide 1/e shielding as 4--9 g cm^-2, depending on flare mean energy and atmospheric column density. Topographic altitude variations give a factor of two variation in dose for a given flare. Life in ice layers that may exist ~ 100 g cm^-2 below the surface would be well protected.

  2. Feasibility of Ground Testing a Moon and Mars Surface Power Reactor in EBR-II

    SciTech Connect (OSTI)

    Sheryl Morton; Carl Baily; Tom Hill; Jim Werner

    2006-02-01

    Ground testing of a surface fission power system would be necessary to verify the design and validate reactor performance to support safe and sustained human exploration of the Moon and Mars. The Idaho National Laboratory (INL) has several facilities that could be adapted to support a ground test. This paper focuses on the feasibility of ground testing at the Experimental Breeder Reactor II (EBR-II) facility and using other INL existing infrastructure to support such a test. This brief study concludes that the INL EBR-II facility and supporting infrastructure are a viable option for ground testing the surface power system. It provides features and attributes that offer advantages to locating and performing ground testing at this site, and it could support the National Aeronautics and Space Administration schedules for human exploration of the Moon. This study used the initial concept examined by the U.S. Department of Energy Inter-laboratory Design and Analysis Support Team for surface power, a lowtemperature, liquid-metal, three-loop Brayton power system. With some facility modification, the EBR-II can safely house a test chamber and perform long-term testing of the space reactor power system. The INL infrastructure is available to receive and provide bonded storage for special nuclear materials. Facilities adjacent to EBR-II can provide the clean room environment needed to assemble and store the test article assembly, disassemble the power system at the conclusion of testing, and perform posttest examination. Capability for waste disposal is also available at the INL.

  3. Our Sun. V. A Bright Young Sun Consistent with Helioseismology and Warm Temperatures on Ancient Earth and Mars

    E-Print Network [OSTI]

    I. -Juliana Sackmann; Arnold I. Boothroyd

    2002-10-05

    The relatively warm temperatures required on early Earth and Mars have been difficult to account for via warming from greenhouse gases. We tested whether this problem can be resolved for both Earth and Mars by a young Sun that is brighter than predicted by the standard solar model. We computed high-precision solar evolutionary models with slightly increased initial masses of M_i = 1.01 to 1.07 M_sun; for each mass, we considered three different mass loss scenarios. We then tested whether these models were consistent with the current high-precision helioseismic observations. The relatively modest mass loss rates in these models are consistent with observational limits from young stars and estimates of the past solar wind obtained from lunar rocks, and do not significantly affect the solar lithium depletion. For appropriate initial masses, all three mass loss scenarios are capable of yielding a solar flux 3.8 Gyr ago high enough to be consistent with water on ancient Mars. We find that all of our mass-losing solar models are consistent with the helioseismic observations. The early solar mass loss of a few percent does indeed leave a small fingerprint on the Sun's internal structure. However, for helioseismology to significantly constrain early solar mass loss would require higher accuracy in the observed solar parameters and input physics, namely, by a factor of about 3 for the observed solar surface composition, and a factor of 2 for the solar interior opacities, the pp nuclear reaction rate, and the diffusion constants for gravitational settling.

  4. Single Variable and Multivariate Analysis of Remote Laser-Induced Breakdown Spectra for Prediction of Rb, Sr, Cr, Ba, and V in Igneous Rocks

    SciTech Connect (OSTI)

    Clegg, Samuel M [Los Alamos National Laboratory; Wiens, Roger C. [Los Alamos National Laboratory; Speicher, Elly A [MT HOLYOKE COLLEGE; Dyar, Melinda D [MT HOLYOKE COLLEGE; Carmosino, Marco L [MT HOLYOKE COLLEGE

    2010-12-23

    Laser-induced breakdown spectroscopy (LIBS) will be employed by the ChemCam instrument on the Mars Science Laboratory rover Curiosity to obtain UV, VIS, and VNIR atomic emission spectra of surface rocks and soils. LIBS quantitative analysis is complicated by chemical matrix effects related to abundances of neutral and ionized species in the resultant plasma, collisional interactions within plasma, laser-to-sample coupling efficiency, and self-absorption. Atmospheric composition and pressure also influence the intensity of LIBS plasma. These chemical matrix effects influence the ratio of intensity or area of a given emission line to the abundance of the element producing that line. To compensate for these complications, multivariate techniques, specifically partial least-squares regression (PLS), have been utilized to predict major element compositions (>1 wt.% oxide) of rocks, PLS methods regress one or multiple response variables (elemental concentrations) against multiple explanatory variables (intensity at each pixel of the spectrometers). Because PLS utilizes all available explanatory variable and eliminates multicollinearity, it generally performs better than univariate methods for prediction of major elements. However, peaks arising from emissions from trace elements may be masked by peaks of higher intensities from major elements. Thus in PLS regression, wherein a correlation coefficient is determined for each elemental concentration at each spectrometer pixel, trace elements may show high correlation with more intense lines resulting from optical emissions of other elements. This could result in error in predictions of trace element concentrations. Here, results of simple linear regression (SLR) and multivariate PLS-2 regression for determination of trace Rb, Sr, Cr, Ba, and V in igneous rock samples are compared. This study focuses on comparisons using only line intensities rather than peak areas to highlight differences between SLR and PLS.

  5. Incorporation of a Helical Tube Heat Transfer Model in the MARS Thermal Hydraulic Systems Analysis Code for the T/H Analyses of the SMART Reactor

    SciTech Connect (OSTI)

    Young Jin Lee; Bub Dong Chung; Jong Chull Jo; Hho Jung Kim; Un Chul Lee

    2004-07-01

    SMART is a medium sized integral type advanced pressurized water reactor currently under development at KAERI. The steam generators of SMART are designed with helically coiled tubes and these are designed to produce superheated steam. The helical shape of the tubes can induce strong centrifugal effect on the secondary coolant as it flows inside the tubes. The presence of centrifugal effect is expected to enhance the formation of cross-sectional circulation flows within the tubes that will increase the overall heat transfer. Furthermore, the centrifugal effect is expected to enhance the moisture separation and thus make it easier to produce superheated steam. MARS is a best-estimate thermal-hydraulic systems analysis code with multi-phase, multi-dimensional analysis capability. The MARS code was produced by restructuring and merging the RELAP5 and the COBRA-TF codes. However, MARS as well as most other best-estimate systems analysis codes in current use lack the detailed models needed to describe the thermal hydraulics of helically coiled tubes. In this study, the heat transfer characteristics and relevant correlations for both the tube and shell sides of helical tubes have been investigated, and the appropriate models have been incorporated into the MARS code. The newly incorporated helical tube heat transfer package is available to the MARS users via selection of the appropriate option in the input. A performance analysis on the steam generator of SMART under full power operation was carried out using the modified MARS code. The results of the analysis indicate that there is a significant improvement in the code predictability. (authors)

  6. Wind measurements in Mars' middle atmosphere at equinox and solstice: IRAM Plateau de Bure interferometric CO observations

    E-Print Network [OSTI]

    R. Moreno; E. Lellouch; T. Encrenaz; F. Forget; E. Chassefiere; F. Hourdin; Stéphane Guilloteau

    2007-01-31

    Characterizing the Martian atmosphere is an essential objective to understand its meteorology and its climate. The lower atmosphere (< 40 km) and middle atmosphere (40-80 km) of Mars appear dynamically coupled at much higher levels than in the case of the Earth. The vertical extension of the weather phenomena is considerable with for example Hadley's cells reaching the top of the neutral atmosphere (120 km). The circulation in the middle atmosphere modifies the meteorology of the lower atmosphere, affecting the transport and climatic processes Observations of the CO rotational lines at millimeter (mm) wavelengths (Clancy et al 1990) have strongly contributed in the study of the vertical distribution of this compound and the thermal profile in the atmosphere of Mars over 0-70 km. Singledish observations of the CO Doppler lineshift have allowed direct wind measurements in the martian middle atmosphere near 50 km altitude (Lellouch et al 1991), but at a low spatial resolution (12'') enabling only an essentially hemispheric resolution of the martian disk. The use of mm interferometry has allowed us to better spatially resolve the Martian disk, in order to obtain wind maps of the middle atmosphere (Moreno et al 2001).

  7. On the probability of the collision of a Mars-sized planet with the Earth to form the Moon

    E-Print Network [OSTI]

    Dvorak, Rudolf; Maindl, Thomas I

    2015-01-01

    The problem of the formation of the Moon is still not explained satisfactorily. While it is a generally accepted scenario that the last giant impact on Earth between some 50 to 100 million years after the starting of the formation of the terrestrial planets formed our natural satellite, there are still many open questions like the isotopic composition which is identical for these two bodies. In our investigation we will not deal with these problems of chemical composition but rather undertake a purely dynamical study to find out the probability of a Mars-sized body to collide with the Earth shortly after the formation of the Earth-like planets. For that we assume an additional massive body between Venus and Earth, respectively Earth and Mars which formed there at the same time as the other terrestrial planets. We have undertaken massive n-body integrations of such a planetary system with 4 inner planets (we excluded Mercury but assumed one additional body as mentioned before) for up to tens of millions of yea...

  8. 46X, mar/46X, dic(Y)(qter p11::qter) - report of a case and literature review

    SciTech Connect (OSTI)

    Siller, M.; Aizpuru, E.; Munchinick, O.

    1994-09-01

    There is a great controversy between phenotype-karyotype in individuals having a chromosomal mosaicism involving one single line 45X, or 2 or more lines with structural rearrangements of the Y chromosome. Here we report a case in a prepuberal patient with a male phenotype, bilateral cryptorchidism, obesity (I), left nipple inversion and low scholar achievement. He was the product of a second normal gestation, with weight of 3,200 kg and height 47 cm, postnatal development reported as normal. The genealogy only shows a paternal uncle with primary sterility (never studied). Clinical findings: height 1.27 cm, weight 38 kg, C.C. 56 cm., T.C. 77 cm., A.C. 72 cm., obesity (I), inverted left nipple, bilateral cryptorchidea with both testicles in inguinal channel, but small and hypotrophic. The blood hormone level determinations were normal. In lymphocyte peripheral blood culture (66 metaphases studied) with C- and G-bands, we found 46X,mar/46X,dic(Y)(qter p11::qter). The karyotype in gonadal cell biopsy showed the presence of the one mentioned above and an additional cell line of 45X (46X,mar/45X/46Xdic). It is reported in the literature some mosaics of Turner syndrome and Y isodicentrics with female phenotype. In our case, the development of the genitals is male; that suggests that the gene determinant for the testes formation was present and active in the early stages of gonadal development.

  9. Early Mars climate near the NoachianHesperian boundary: Independent evidence for cold conditions from basal melting of the south polar ice sheet (Dorsa

    E-Print Network [OSTI]

    Marchant, David R.

    from basal melting of the south polar ice sheet (Dorsa Argentea Formation) and implications for valley of the Amazonian, the mean annual surface temperatures of Mars are so cold that basal melting does not occur in ice-developed eskers (sediment-filled former sub-glacial meltwater chan- nels) in the south circumpolar Dorsa Argentea

  10. Northern mid-latitude glaciation in the Late Amazonian period of Mars: Criteria for the recognition of debris-covered glacier and valley glacier landsystem deposits

    E-Print Network [OSTI]

    Marchant, David R.

    in talus pile pore space caused lubrication and flow during an earlier climatic regime. A number of factors have remained uncertain, however, including the detailed structure and texture of LDA analogs, to assess the characteristics of LDA/LVF in the northern mid-latitudes of Mars. We find evidence

  11. J. Exp. Mar. Biol. Ecol., 1987, Vol. 113, pp. 231-245 Lift as a mechanism of patch initiation in mussel beds

    E-Print Network [OSTI]

    Denny, Mark

    J. Exp. Mar. Biol. Ecol., 1987, Vol. 113, pp. 231-245 Elsevier 231 JEM 00974 Lift as a mechanism of patch initiation in mussel beds Mark W. Denny Hopkins Marine Station, Department of Biological Sciences patch formation. Arguments are presented suggesting that the likelihood of dislodgment by lift

  12. arXiv:1003.2138v1[cs.IT]10Mar2010 1 Need-based Communication for Smart Grid: When

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    arXiv:1003.2138v1[cs.IT]10Mar2010 1 Need-based Communication for Smart Grid: When to Inquire Power Price? Husheng Li and Robert C. Qiu Abstract-- In smart grid, a home appliance can adjust its power on smart grid do not consider the cost of communications which cannot be ignored in many situations

  13. HOW HIGH IS THAT DUNE? A COMPARISON OF METHODS USED TO CONSTRAIN THE MORPHOMETRY OF AEOLIAN BEDFORMS ON MARS. M. Bourke1

    E-Print Network [OSTI]

    Bourke, Mary C.

    HOW HIGH IS THAT DUNE? A COMPARISON OF METHODS USED TO CONSTRAIN THE MORPHOMETRY OF AEOLIAN available for dunes on Mars). These include dune height, width, length, surface area, volume, lon- gitudinal. In this paper we undertake a comparative analysis of methods used to determine the height of aeolian dunes

  14. 7. Top-down control over the motor cortex Rogier B. Mars, Franz-Xaver Neubert, and Matthew F.S. Rushworth

    E-Print Network [OSTI]

    Mars, Rogier Bertrand

    7. Top-down control over the motor cortex Rogier B. Mars, Franz-Xaver Neubert, and Matthew F selection, top-down control is particularly needed during situations of response conflict, where. In this chapter, we discuss recent advances in the study of top-down control over motor cortex during action

  15. Structural Insight on the Mechanism of Regulation of the MarR Family of Proteins: High-Resolution Crystal Structure of a Transcriptional Repressor from Methanobacterium thermoautotrophicum

    SciTech Connect (OSTI)

    Saridakis, Vivian; Shahinas, Dea; Xu, Xiaohui; Christendat, Dinesh

    2008-03-31

    Transcriptional regulators belonging to the MarR family are characterized by a winged-helix DNA binding domain. These transcriptional regulators regulate the efflux and influx of phenolic agents in bacteria and archaea. In Escherichia coli, MarR regulates the multiple antibiotic resistance operon and its inactivation produces a multiple antibiotic resistance phenotype. In some organisms, active efflux of drug compounds will produce a drug resistance phenotype, whereas in other organisms, active influx of chlorinated hydrocarbons results in their rapid degradation. Although proteins in the MarR family are regulators of important biological processes, their mechanism of action is not well understood and structural information about how phenolic agents regulate the activity of these proteins is lacking. This article presents the three-dimensional structure of a protein of the MarR family, MTH313, in its apo form and in complex with salicylate, a known inactivator. A comparison of these two structures indicates that the mechanism of regulation involves a large conformational change in the DNA binding lobe. Electrophoretic mobility shift assay and biophysical analyses further suggest that salicylate inactivates MTH313 and prevents it from binding to its promoter region.

  16. Pesq. agropec. bras., Braslia, v.39, n.3, p.201-208, mar. 2004 Mutants of common bean alpha-amylase inhibitor-2 201

    E-Print Network [OSTI]

    Neshich, Goran

    Pesq. agropec. bras., Brasília, v.39, n.3, p.201-208, mar. 2004 Mutants of common bean alpha-amylase inhibitor-2 201 Mutants of common bean alpha-amylase inhibitor-2 as an approach to investigate binding specificity to alpha-amylases Maria Cristina Mattar da Silva(1) , Luciane Vieira Mello(1) , Marise Ventura

  17. 92:73-82, 2004. First published Mar 10, 2004; doi:10.1152/jn.00059.2004JN Daniel L. Rathbun and Michael P. Kilgard

    E-Print Network [OSTI]

    Kilgard, Michael P.

    92:73-82, 2004. First published Mar 10, 2004; doi:10.1152/jn.00059.2004JN Daniel L. Rathbun articles:This article has been cited by [PDF][Full Text] , July 1, 2004; 92 (1): 36-37.J Neurophysiol H. R, University of Texas at Dallas, Richardson, Texas 75083-0688 Submitted 16 January 2004; accepted in final form

  18. EG-1998-03-109-HQ Activities in Planetary Geology for the Physical and Earth Sciences Exercise Eleven: Geologic Features of Mars

    E-Print Network [OSTI]

    127 EG-1998-03-109-HQ Activities in Planetary Geology for the Physical and Earth Sciences Exercise Eleven: Geologic Features of Mars Purpose By examining images of martian surface features, students will learn to identify landforms and inter- pret the geologic processes which formed them. Background

  19. GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 3, PAGES 415-418, FEBRUARY 1, 2001 Titan, Mars and Earth : Entropy Production by

    E-Print Network [OSTI]

    Lorenz, Ralph D.

    and Planetary Laboratory, University of Arizona, Tucson, AZ 85721-0092, USA Christopher P. McKay NASA Ames (MEP) principle is consistent with Titan's observed zonal structure and the winds and CO2 frost cycle on Mars. The principle makes powerful predictions where detailed infor- mation is lacking

  20. Structure and dynamics of the solar wind/ionosphere interface on Mars: MEX-ASPERA-3 and MEX-MARSIS observations

    E-Print Network [OSTI]

    Gurnett, Donald A.

    mass and charge) in the energy range 0.01­36 keV/q. The ELS sensor measures 2D distributions ofStructure and dynamics of the solar wind/ionosphere interface on Mars: MEX-ASPERA-3 and MEX wind plasmas and the magnetic field strength carried out by the ASPERA-3 and MARSIS experiments onboard

  1. J Med Internet Res. 2010 Jan-Mar; 12(1): e6. Published online 2010 March 12. doi: 10.2196/jmir.1149

    E-Print Network [OSTI]

    Kiesler, Sara

    Go to: Go to: J Med Internet Res. 2010 Jan-Mar; 12(1): e6. Published online 2010 March 12. doi: 10.2196/jmir.1149 PMCID: PMC3234167 Effects of Internet Use on Health and Depression: A Longitudinal Study by other articles in PMC. Abstract Background The rapid expansion of the Internet has increased the ease

  2. SEMI-THERM 21, SEMICONDUCTOR THERMAL MEASUREMENT AND MANAGMENT SYMPOSIUM, SAN JOSE. MAR 15-17, 2005. 1 Thermal Contact Resistance: Effect of Elastic

    E-Print Network [OSTI]

    Bahrami, Majid

    in the microelectronics industry is low due to load constraints. In this paper a new model is presented which is moreSEMI-THERM 21, SEMICONDUCTOR THERMAL MEASUREMENT AND MANAGMENT SYMPOSIUM, SAN JOSE. MAR 15-17, 2005 elastic modulus, Pa F = applied load, N Hmic = microhardness, Pa H = non-dimensional microhardness Hmic

  3. arXiv:1202.0867v2[cs.CG]26Mar2012 Practical Conditions for Well-behaved-ness of Anisotropic Voronoi

    E-Print Network [OSTI]

    Poggio, Tomaso

    arXiv:1202.0867v2[cs.CG]26Mar2012 Practical Conditions for Well-behaved-ness of Anisotropic Voronoi Recently, simple conditions for well-behaved-ness of anisotropic Voronoi diagrams have been proposed. While these conditions ensure well-behaved-ness of two types of practical anisotropic Voronoi diagrams, as well

  4. The Whole Mars Catalog About Us Advertising Comments Tuesday, October 18, 2005 Select a Site Go Home | Calendar -News -Gallery -Space Directory -Station Guide -Space Weather

    E-Print Network [OSTI]

    Arizona, University of

    Go Home | Calendar - News - Gallery - Space Directory - Station Guide - Space Weather Mars News the history of a planet and the life forms that may have lived on it, the really good places to look greater opportunity and freedom to identify and home in on geological and potential astrobiological 'sweet

  5. America's Digital Divide Narrows http://www.businessweek.com/print/technology/content/mar2007/tc2007... 1 of 2 3/15/2007 7:47

    E-Print Network [OSTI]

    Knaust, Helmut

    America's Digital Divide Narrows http://www.businessweek.com/print/technology/content/mar2007/tc2007... 1 of 2 3/15/2007 7:47 TECHNOLOGY March 15, 2007, 8:14PM EST America's Digital Divide Narrows broadband connections to post blogs, watch and share videos on Google's (GOOG) YouTube, spruce up News Corp

  6. INFECTION AND IMMUNITY, Mar. 2004, p. 16661676 Vol. 72, No. 3 0019-9567/04/$08.00 0 DOI: 10.1128/IAI.72.3.16661676.2004

    E-Print Network [OSTI]

    Conway, Tyrrell

    INFECTION AND IMMUNITY, Mar. 2004, p. 1666­1676 Vol. 72, No. 3 0019-9567/04/$08.00 0 DOI: 10 September 2003/Accepted 13 November 2003 Escherichia coli EDL933, an O157:H7 strain, is known to colonize are employed during colonization has not been determined. In this study, when the wild-type EDL933 strain

  7. DOI: 10.1113/jphysiol.2007.128082 2007;581;787-800; originally published online Mar 15, 2007;J. Physiol.

    E-Print Network [OSTI]

    Mawe, Gary M.

    DOI: 10.1113/jphysiol.2007.128082 2007;581;787-800; originally published online Mar 15, 2007;J-induced synaptic facilitation Synaptic plasticity in myenteric neurons of the guinea-pig distal colon: presynaptic-pig distal colon: presynaptic mechanisms of inflammation- induced synaptic facilitation Eric M. Krauter1

  8. JOURNAL OF BACTERIOLOGY, Mar. 2005, p. 20582065 Vol. 187, No. 6 0021-9193/05/$08.00 0 doi:10.1128/JB.187.6.20582065.2005

    E-Print Network [OSTI]

    McFall-Ngai, Margaret

    JOURNAL OF BACTERIOLOGY, Mar. 2005, p. 2058­2065 Vol. 187, No. 6 0021-9193/05/$08.00 0 doi:10 bacterial motility to initiate colonization of the Hawaiian squid Euprymna scolopes. Once colonized, however). Colonization begins with aggregation of V. fischeri cells in mucus on the surface of the light organ (37, 38

  9. 10.1101/gr.071886.107Access the most recent version at doi: 2008 18: 717-728; originally published online Mar 13, 2008;Genome Res.

    E-Print Network [OSTI]

    Feschotte, Cedric

    online Mar 13, 2008;Genome Res. Peter W. Atkinson and Nancy L. Craig David A. Ray, Cedric Feschotte-like and Tc2-like elements. This was followed by the colonization of Tc1-like elements, and by a more recent

  10. arXiv:1503.00301v1[cs.DB]1Mar2015 On Defining SPARQL with Boolean Tensor Algebra

    E-Print Network [OSTI]

    Waldmann, Uwe

    arXiv:1503.00301v1[cs.DB]1Mar2015 On Defining SPARQL with Boolean Tensor Algebra Saskia Metzler Max-case calligraphic letters (T ). Element (i, j, k) of a 3-way tensor X is denoted as xijk. A colon in a subscript

  11. Instituto de Investigaciones Marinas y Costeras 183 Bol. Invest. Mar. Cost. 43 (1) ISSN 0122-9761 Santa Marta, Colombia, 2014183-193

    E-Print Network [OSTI]

    Floeter, Sergio Ricardo

    Instituto de Investigaciones Marinas y Costeras 183 Bol. Invest. Mar. Cost. 43 (1) ISSN 0122 Ecologia e Zoologia, Lab. de Biogeografia e Macroecologia Marinha, Florianópolis, SC 88010-970, Brasil Postal 6109, 13083-970 Campinas, São Paulo, Brasil. isazima@gmail.com RESUMEN Asociaciones alimentarias

  12. arXiv:1203.6284v1[nucl-th]28Mar2012 Isovector part of nuclear energy density functional

    E-Print Network [OSTI]

    Weise, Wolfram

    arXiv:1203.6284v1[nucl-th]28Mar2012 Isovector part of nuclear energy density functional from chiral The nuclear energy density functional approach is the many-body method of choice in order to calculate the contributions to the energy are written in terms of density-matrices convoluted with the finite

  13. Methodology assessment and recommendations for the Mars science laboratory launch safety analysis.

    SciTech Connect (OSTI)

    Sturgis, Beverly Rainwater; Metzinger, Kurt Evan; Powers, Dana Auburn; Atcitty, Christopher B.; Robinson, David B; Hewson, John C.; Bixler, Nathan E.; Dodson, Brian W.; Potter, Donald L.; Kelly, John E.; MacLean, Heather J.; Bergeron, Kenneth Donald; Bessette, Gregory Carl; Lipinski, Ronald J.

    2006-09-01

    The Department of Energy has assigned to Sandia National Laboratories the responsibility of producing a Safety Analysis Report (SAR) for the plutonium-dioxide fueled Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) proposed to be used in the Mars Science Laboratory (MSL) mission. The National Aeronautic and Space Administration (NASA) is anticipating a launch in fall of 2009, and the SAR will play a critical role in the launch approval process. As in past safety evaluations of MMRTG missions, a wide range of potential accident conditions differing widely in probability and seventy must be considered, and the resulting risk to the public will be presented in the form of probability distribution functions of health effects in terms of latent cancer fatalities. The basic descriptions of accident cases will be provided by NASA in the MSL SAR Databook for the mission, and on the basis of these descriptions, Sandia will apply a variety of sophisticated computational simulation tools to evaluate the potential release of plutonium dioxide, its transport to human populations, and the consequent health effects. The first step in carrying out this project is to evaluate the existing computational analysis tools (computer codes) for suitability to the analysis and, when appropriate, to identify areas where modifications or improvements are warranted. The overall calculation of health risks can be divided into three levels of analysis. Level A involves detailed simulations of the interactions of the MMRTG or its components with the broad range of insults (e.g., shrapnel, blast waves, fires) posed by the various accident environments. There are a number of candidate codes for this level; they are typically high resolution computational simulation tools that capture details of each type of interaction and that can predict damage and plutonium dioxide release for a range of choices of controlling parameters. Level B utilizes these detailed results to study many thousands of possible event sequences and to build up a statistical representation of the releases for each accident case. A code to carry out this process will have to be developed or adapted from previous MMRTG missions. Finally, Level C translates the release (or ''source term'') information from Level B into public risk by applying models for atmospheric transport and the health consequences of exposure to the released plutonium dioxide. A number of candidate codes for this level of analysis are available. This report surveys the range of available codes and tools for each of these levels and makes recommendations for which choices are best for the MSL mission. It also identities areas where improvements to the codes are needed. In some cases a second tier of codes may be identified to provide supporting or clarifying insight about particular issues. The main focus of the methodology assessment is to identify a suite of computational tools that can produce a high quality SAR that can be successfully reviewed by external bodies (such as the Interagency Nuclear Safety Review Panel) on the schedule established by NASA and DOE.

  14. Last updated on January 12, 2014 at 14:07 EST Log In and Sign Up with: SearchHome Video News Images Health Education Topics Blogs On Science

    E-Print Network [OSTI]

    Chiao, Jung-Chih

    Health Education Topics Blogs On Science Space Science Technology Health General Sci-Fi & Gaming Oddities International Business Education Mars Science Laboratory Curiosity Home » News » Technology » Micro-Turbine Technology Could Use Wind Power To Charge Mobile Devices Micro-Turbine Technology Could Use Wind Power

  15. The activity of CouR, a MarR family transcriptional regulator, is modulated through a novel molecular mechanism

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Otani, Hiroshi; Stogios, Peter J.; Xu, Xiaohui; Nocek, Boguslaw; Li, Shu -Nan; Savchenko, Alexei; Eltis, Lindsay D.

    2015-09-22

    CouR, a MarR-type transcriptional repressor, regulates the cou genes, encoding p-hydroxycinnamate catabolism in the soil bacterium Rhodococcus jostii RHA1. The CouR dimer bound two molecules of the catabolite p-coumaroyl–CoA (Kd = 11 ± 1 ?M). The presence of p-coumaroyl–CoA, but neither p-coumarate nor CoASH, abrogated CouR's binding to its operator DNA in vitro. The crystal structures of ligand-free CouR and its p-coumaroyl–CoA-bound form showed no significant conformational differences, in contrast to other MarR regulators. The CouR–p-coumaroyl–CoA structure revealed two ligand molecules bound to the CouR dimer with their phenolic moieties occupying equivalent hydrophobic pockets in each protomer and their CoAmore »moieties adopting non-equivalent positions to mask the regulator's predicted DNA-binding surface. More specifically, the CoA phosphates formed salt bridges with predicted DNA-binding residues Arg36 and Arg38, changing the overall charge of the DNA-binding surface. The substitution of either arginine with alanine completely abrogated the ability of CouR to bind DNA. By contrast, the R36A/R38A double variant retained a relatively high affinity for p-coumaroyl–CoA (Kd = 89 ± 6 ?M). Altogether, our data point to a novel mechanism of action in which the ligand abrogates the repressor's ability to bind DNA by steric occlusion of key DNA-binding residues and charge repulsion of the DNA backbone.« less

  16. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Mar. 2004, p. 18211826 Vol. 70, No. 3 0099-2240/04/$08.00 0 DOI: 10.1128/AEM.70.3.18211826.2004

    E-Print Network [OSTI]

    Goodman, Robert M.

    APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Mar. 2004, p. 1821­1826 Vol. 70, No. 3 0099), colonize the rhizo- sphere. Previous work by our laboratory has shown that cren- archaeotes colonize tomato

  17. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Mar. 2004, p. 13281335 Vol. 70, No. 3 0099-2240/04/$08.00 0 DOI: 10.1128/AEM.70.3.13281335.2004

    E-Print Network [OSTI]

    Blanchette, Robert A.

    APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Mar. 2004, p. 1328­1335 Vol. 70, No. 3 0099 Antarctica has one of the coldest and driest environments on earth, microbes have colonized the wood

  18. We Brake for Mars Hi! My name is Mike Meacham. I'm an engineer here at the Jet Propulsion Laboratory and

    E-Print Network [OSTI]

    Waliser, Duane E.

    We Brake for Mars Hi! My name is Mike Meacham. I'm an engineer here at the Jet Propulsion a really big parachute. To make these large parachutes you have to test them before you go. You need a way've got to test big here on Earth. You got to be a little crazy sometimes if you want to do crazy things

  19. Oceanography Vol. 19, No. 1, Mar. 2006152 R E G U L A R I S SU E F E AT U R E

    E-Print Network [OSTI]

    Rhode Island, University of

    Oceanography Vol. 19, No. 1, Mar. 2006152 R E G U L A R I S SU E F E AT U R E BY J A M E S A . YO D E R A N D M AU R E E N A . K E N N E L LY Almost 20 years ago, Oceanography published a short for oceanography". That remark has certainly proved to be accurate, and imagery from CZCS, OCTS (Ocean Color

  20. Next Generation Rover for Lunar Exploration Dan A. Harrison

    E-Print Network [OSTI]

    Rathbun, Julie A.

    .............................................................12 1. INTRODUCTION A bright light appears in the starry blackness above the stark lunar landscape truck, known as Chariot shown in Figure 4. The Chariot is a new multipurpose, reconfigurable, modular truck is named Chariot because of the chariot-like "look" of the standing crew members driving

  1. Design, simulation, and control of a vertically balancing treaded rover

    E-Print Network [OSTI]

    Grinberg, Matt R.

    2009-01-01

    motor selection and gear-train design, as the right amountdesign allows specialized bores to be made in each gear. It

  2. Position Estimation Scheme for Lunar Rover Based on Integration of

    E-Print Network [OSTI]

    Kuroda, Yoji

    coordinate system at center of the Earth z-axis: north celestial pole x-axis: vernal equinox direction y-axis: vernal equinox direction y-axis: right-hand system of x-z origin: the Moon We can calculate the position

  3. Design, simulation, and control of a vertically balancing treaded rover

    E-Print Network [OSTI]

    Grinberg, Matt R.

    2009-01-01

    accommodate an axle bearing to support the main boom shaft.Main Geartrain Components Figure 2.7. The wire enters the shaft, the bearing

  4. National Aeronautics and Space Administration Small Pressurized Rover Concept

    E-Print Network [OSTI]

    Rathbun, Julie A.

    research. One of the goals for testing these prototypes on Earth is to identify the benefits of the SPR packages. Even in the midst of challenging terrain, emergency shelter and support can be less than an hour

  5. Surface composition and taxonomic classification of a group of near-Earth and Mars-crossing asteroids

    E-Print Network [OSTI]

    Sanchez, Juan A; Reddy, Vishnu; Nathues, Andreas

    2013-01-01

    In the past, constraining the surface composition of near-Earth asteroids (NEAs) has been difficult due to the lack of high quality near-IR spectral data (0.7-2.5 microns) that contain mineralogically diagnostic absorption bands. Here we present visible (0.43-0.95 microns) and near-infrared (0.7-2.5 microns) spectra of nine NEAs and five Mars-crossing asteroids (MCs). The studied NEAs are: 4055 Magellan, 19764 (2000 NF5), 89830 (2002 CE), 138404 (2000 HA24), 143381 (2003 BC21), 159609 (2002 AQ3), 164121 (2003 YT1), 241662 (2000 KO44) and 2007 ML13. The studied MCs are: 1656 Suomi, 2577 Litva, 5407 (1992 AX), 22449 Ottijeff and 47035 (1998 WS). The observations were conducted with the NTT at La Silla, Chile, the 2.2 m telescope at Calar Alto, Spain, and the IRTF on Mauna Kea, Hawai'i. The taxonomic classification (Bus system) of asteroids showed that all observed MC asteroids belong to the S-complex, including the S, Sr and Sl classes. Seven of the NEAs belong to the S-complex, including the S, Sa, Sk and Sl c...

  6. Experimental and code simulation of a station blackout scenario for APR1400 with test facility ATLAS and MARS code

    SciTech Connect (OSTI)

    Yu, X. G.; Kim, Y. S.; Choi, K. Y.; Park, H. S.; Cho, S.; Kang, K. H.; Choi, N. H. [Thermal-hydraulic Safety Research Div., KAERI Korea Atomic Energy Research Inst., Dae-deok Dae-ro 989-111, Yuseong-gu, Daejeon (Korea, Republic of)

    2012-07-01

    A SBO (station blackout) experiment named SBO-01 was performed at full-pressure IET (Integral Effect Test) facility ATLAS (Advanced Test Loop for Accident Simulation) which is scaled down from the APR1400 (Advanced Power Reactor 1400 MWe). In this study, the transient of SBO-01 is discussed and is subdivided into three phases: the SG fluid loss phase, the RCS fluid loss phase, and the core coolant depletion and core heatup phase. In addition, the typical phenomena in SBO-01 test - SG dryout, natural circulation, core coolant boiling, the PRZ full, core heat-up - are identified. Furthermore, the SBO-01 test is reproduced by the MARS code calculation with the ATLAS model which represents the ATLAS test facility. The experimental and calculated transients are then compared and discussed. The comparison reveals there was malfunction of equipments: the SG leakage through SG MSSV and the measurement error of loop flow meter. As the ATLAS model is validated against the experimental results, it can be further employed to investigate the other possible SBO scenarios and to study the scaling distortions in the ATLAS. (authors)

  7. Curiosity Based Exploration for Learning Terrain Models Yogesh Girdhar, David Whitney, and Gregory Dudek

    E-Print Network [OSTI]

    Dudek, Gregory

    . We posit that observation data collected from such paths that seek novelty and maximize information and temporal distribution of the data. Moreover, ROST can process the incoming observation data in real time0E9, Canada {yogesh,dwhitney,dudek}@cim.mcgill.ca Fig. 1. Example of an exploratory path (top

  8. Current BPA Power Rates (pbl/rates)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAuditsClusterInformationContractCorporateCrookerCrystalCuriosity roverNational

  9. Computer Science? Computer science is shaping the future. A degree in computer

    E-Print Network [OSTI]

    Cafarella, Michael J.

    Aerial Vehicles, UM::Autonomy, U-M Programming, U-M Solar Car, Hybrid Racing, and the Mars Rover Team-HEAL. Michigan Hackers: Experimenting with technology gEECS: Girls in electrical engineering and computer science Student Organizations Computer Science @ Michigan COMPUTERSCIENCE Department of Electrical Engineering

  10. National Aeronautics and Space Administration

    E-Print Network [OSTI]

    Waliser, Duane E.

    Integration and Test Environmental Test Mars Rovers Large Structures - SRTM Ion Engines Scientific Research 09 of Technology Pasadena, California Every mission starts with a spark Mission Architecture Technology Engineering the concept is developed Trades Comments Launch vehicle Atlas V Delta IV-Heavy Ares V Ares V considered

  11. 2 Comparative Climatology of Terrestrial Planets geologic features (e.g., Mueller et al., 2008; Smrekar et al.,

    E-Print Network [OSTI]

    Atreya, Sushil

    ). As this mission winds down in 2015, current plans are to perform a second attempt to place the Japanese Akatsuki and dynamics, par- ticularly the planet's global superrotating wind structure. 1.2. Mars Spacecraft Data Exploration Rovers landed on January 3 and 25, 2004, and quickly discovered S-bearing minerals formed within

  12. 2002 JET PROPULSION A N N U A L . R E P O R T

    E-Print Network [OSTI]

    the world's largest wind tunnel, located at NASA's Ames Research Center, to test the Mars Exploration Rover and other NASA centers as a member of the "One NASA" team. There is a strong emphasis on cost con- trol and management, areas in which we can improve, enabling us to become more com- petitive. This new agreement again

  13. Learning From NASA Mishaps: What Separates Success From Failure?

    E-Print Network [OSTI]

    Rhoads, James

    Shutdown of WSTF Large Altitude Simulation System & Blowback on Test Article Type D Hydraulic Pump (HPU-3) Electrical Arc Between Pump & Crane Hook Damage Less Than $25K 2003 2006 2006 2006 2005 #12;6 What Can Go Maintenance 8% Space 41% Ground Test 27% #12;10 Close Calls And Mishaps Mars Exploration Rovers Even programs

  14. W I N T E R 2 0 1 2 / 2 0 1 3 SchulichE N G I N E E R

    E-Print Network [OSTI]

    Calgary, University of

    Space research: Mars rovers, telescopes and astronaut food BY JENNIFER ALLFORD PAGE 15 How 3D printing AND ASTRONAUT FOOD BY JENNIFER ALLFORD Gliding to a world record in wingsuit skydiving BY JENNIFER SOWA How 3D printing is changing the world of design BY LIZZIE MACNEILL +Internship Photo Contest winners #12;Schulich

  15. For 35 years, the National Renewable Energy Laboratory, the U.S. Department of Energy's premier

    E-Print Network [OSTI]

    environment. 6 #12;NREL-designed highly efficient, multi-junction solar cells fly aboard Earth-orbiting satellites and Mars rover. NREL's inverted metamorphic multi-junction solar cell is a natural candidate and lead to rapid failure. The "buried anode" technology triples the performance of today's lithium

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    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLosThe 26th AnnualHistoryM aterialsmFUSE: Functionmanaging the` [ `

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    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResource and Job Event InLANL monitoring theSafetyJeffLANL

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse BergkampCentermillion to localPartnership willLynn

  19. SSRL HEADLINES Mar 2002

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) byMultidayAlumni > The2/01/12 Page 1NEWS MEDIA16,3087 January,122 -19

  20. SSRL HEADLINES Mar 2007

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) byMultidayAlumni > The2/01/12 Page 1NEWS MEDIA16,3087 January,122 -199