Recursos de colección

NASA Technical Reports Server (NTRS) (681.325 recursos)

The NTRS is a valuable resource for students, educators, researchers, and the public for access to NASA's current and historical technical literature since it was first released in 1994. NTRS provides access to approximately 500K aerospace related citations, 90K full-text online documents, and 111K images and videos. NTRS numbers continues to grow over time as new scientific and technical information (STI) is created or funded by NASA. The type of information found in NTRS include: conference papers, images, journal articles, photos, meeting papers, movies, patents, research reports, and technical videos.

Mostrando recursos 1 - 20 de 316.806

  1. Development of a Microwave Regenerative Sorbent-Based Hydrogen Purifier

    Dewberry, Ross H.; Greenwood, Zachary W.; Abney, Morgan B.; Wheeler, Richard R., Jr.; McCurry, Bryan D.
    This paper describes the design and fabrication of a Microwave Regenerative Sorbent-based Hydrogen Purifier (MRSHP). This unique microwave powered technology was developed for the purification of a hydrogen stream produced by the Plasma Pyrolysis Assembly (PPA). The PPA is a hydrogen recovery (from methane) post processor for NASA's Sabatier-based carbon dioxide reduction process. Embodied in the Carbon dioxide Reduction Assembly (CRA), currently aboard the International Space Station (ISS), the Sabatier reaction employs hydrogen to catalytically recover oxygen, in the form of water, from respiratory carbon dioxide produced by the crew. This same approach is base-lined for future service in the...

  2. Development of Advanced ISS-WPA Catalysts for Organic Oxidation at Reduced Pressure/Temperature

    Kayatin, Matthew; Yu, Ping; Nalette, Tim
    The Water Processor Assembly (WPA) at International Space Station (ISS) processes a waste stream via multi-filtration beds, where inorganic and non-volatile organic contaminants are removed, and a catalytic reactor, where low molecular weight organics not removed by the adsorption process are oxidized at elevated pressure in the presence of oxygen and elevated temperature above the normal water boiling point. Operation at an elevated pressure requires a more complex system design compared to a reactor that could operate at ambient pressure. However, catalysts currently available have insufficient activity to achieve complete oxidation of the organic load at a temperature less than...

  3. Self-Aware Vehicles: Mission and Performance Adaptation to System Health

    Gregory, Irene M.; Scotti, Stephen J.; Leonard, Charles
    Advances in sensing (miniaturization, distributed sensor networks) combined with improvements in computational power leading to significant gains in perception, real-time decision making/reasoning and dynamic planning under uncertainty as well as big data predictive analysis have set the stage for realization of autonomous system capability. These advances open the design and operating space for self-aware vehicles that are able to assess their own capabilities and adjust their behavior to either complete the assigned mission or to modify the mission to reflect their current capabilities. This paper discusses the self-aware vehicle concept and associated technologies necessary for full exploitation of the concept....

  4. Gas Generators and Their Potential to Support Human-Scale HIADS (Hypersonic Inflatable Aerodynamic Decelerators)

    Dillman, Robert A; Dinonno, John M.; Lucy, Melvin H.; Bodkin, Richard J.; Cheatwood, F. M.; Hughes, Stephen J.
    As HIAD technology progresses from 3-m diameter experimental scale to as large as 20-m diameter for human Mars entry, the mass penalties of carrying compressed gas has led the HIAD team to research current state-of-the-art gas generator approaches. Summarized below are several technologies identified in this survey, along with some of the pros and cons with respect to supporting large-scale HIAD applications.

  5. NASA Immunology Laboratory Internship: Applied Clinical Immunology, Tissue Engineering, Modeled Microgravity

    Davis, Sharice; McKnight, Quiana; Pettit, Justis; Crucian, Brian
    No abstract available

  6. Evaluation of Veriflow for Complex Matrices

    Gunderson, Annika
    No abstract available

  7. Fracture Risk in Astronauts: A Prospective Cohort Study

    Shah, Jay
    No abstract available

  8. Thomas Leps Internship Abstract

    Leps, Thomas
    An optical navigation system is being flown as the backup system to the primary Deep Space Network telemetry for navigation and guidance purposes on Orion. This is required to ensure Orion can recover from a loss of communication, which would simultaneously cause a loss of DSN telemetry. Images taken of the Moon and Earth are used to give range and position information to the navigation computer for trajectory calculations and maneuver execution. To get telemetry data from these images, the size and location of the moon need to be calculated with high accuracy and precision. The reentry envelope for the...

  9. Zinc and Copper Balances During 3 Weeks of Bed Rest, with or Without Artificial Gravity

    Smith, Scott M.; Heacox, Hayley
    No abstract available

  10. Holodeck-ISS Experience

    Rainbolt, Phillip
    For the duration of my internship here at JSC for the summer 2016 session, the main project that I worked on dealt with hybrid reality simulations of the ISS. As an ER6 intern for the spacecraft software division, the main project that I worked alongside others was with regards to the Holodeck Virtual Reality Project, specifically with the ISS experience, with the use of the HTC Vive and controllers.

  11. Holodeck Testbed Project

    Arias, Adriel
    The main objective of the Holodeck Testbed is to create a cost effective, realistic, and highly immersive environment that can be used to train astronauts, carry out engineering analysis, develop procedures, and support various operations tasks. Currently, the Holodeck testbed allows to step into a simulated ISS (International Space Station) and interact with objects; as well as, perform Extra Vehicular Activities (EVA) on the surface of the Moon or Mars. The Holodeck Testbed is using the products being developed in the Hybrid Reality Lab (HRL). The HRL is combining technologies related to merging physical models with photo-realistic visuals to create...

  12. Next-Generation Microbial Monitoring Efforts

    Oubre, Cherie; Ott, Mark; Oijala, Ellie
    No abstract available

  13. Primitive Liquid Water of the Solar System in an Aqueous Altered Carbonaceous Chondrite

    Zolensky, M. E.; Uesugi, K.; Suzuki, Y.; Nakano, T.; Takeuchi, A.; Tsuchiyama, A.; Matsuno, J.; Kitayama, A.; Miyake, A.
    Non-destructive 3D observations of the aqueous altered CM chondrite Sutter's Mill using scanning imaging x-ray microscopy (SIXM) showed that some of calcite and enstatite grains contain two-phase inclusion, which is most probably composed of liquid water and bubbles. This water should be primitive water responsible for aqueous alteration in an asteroid in the early solar system.

  14. Simulation Development and Analysis of Crew Vehicle Ascent Abort

    Wong, Chi S.
    NASA's Commercial Crew Program is an integral step in its journey to Mars as it would expedite development of space technologies and open up partnership with U.S. commercial companies. NASA reviews and independent assessment of Commercial Crew Program is fundamental to its success, and being able to model a commercial crew vehicle in a simulation rather than conduct a live test would be a safer, faster, and less expensive way to assess and certify the capabilities of the vehicle. To this end, my project was to determine the feasibility of using a simulation tool named SOMBAT version 2.0 to model...

  15. Bone Imaging, TBS, and VFA

    Lenfest, Scott; Sibonga, Jean
    No abstract available

  16. Identifying Initial Suit-Body Contact

    Bernal, Yaritza
    Extravehicular Activity EVA suits like the Extravehicular Mobility Unit EMU are the key component used by the crew to perform EVA operations. The crew is trained extensively in the EMU to be able to perform their EVA's effectively. This extensive training can cause problems and even lead to injury if any abnormal forces are used. In the case of a bad design, if the humans movement exceeds the suits design parameters it can result in unusual wear and tear of the suit components, or may result in failed tasks when the human is not able to perform a task the...

  17. Space to Space Advanced EMU Radio

    Maicke, Andrew
    The main task for this project was the development of a prototype for the Space to Space Advanced EMU Radio (SSAER). The SSAER is an updated version of the Space to Space EMU Radio (SSER), which is the current radio used by EMUs (Extravehicular Mobility Unit) for communication between suits and with the ISS. The SSER was developed in 1999, and it was desired to update the design used in the system. Importantly, besides replacing out-of-production parts it was necessary to decrease the size of the radio due to increased volume constraints with the updated Portable Life Support System (PLSS)...

  18. Design of Material Pretreatment Procedures: Using Ionic Silver as a Biocide for Long-Duration Spaceflight Missions

    Marlar, Tyler J.
    No abstract available

  19. Testing and Analysis of Suited Human Performance in Altered Gravity Environments

    McNamara, Liam; Norcross, Jason
    No abstract available

  20. Research Internship on Pulse Electromagnetic Fields (PEMF) and Microwave Applications for Deep Space Exploration Medical Use

    Hehir, Austin
    Throughout my internship, I worked under Dr. Diane Byerly on Pulse Electromagnetic Fields (PEMF) in the Biomedical Engineering for Exploration Space Technology Laboratory (BEEST). I conducted experiments and analyzed the impact coil size, placement, and contour have on flux densities. Using this information, I optimized coil configurations for future patient use. This was achieved by using a fiberglass leg casting and PEMF coils to evaluate the different flux densities produced at different locations on the leg. The fiberglass casting was an improvement on the prior test that used cylindrical tubing to determine the flux densities generated. The cast allowed for...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.