NASA

 
 
 
 
 
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    New NASA STI

  • The Effect of Indenter Ball Radius on the Static Load Capacity of the Superelastic 60NiTi for Rolling Element Bearings

    28 Jul 2014 | 10:02 am
    Abstract: Static load capacity is a critical design parameter for rolling element bearings used in space mechanisms because of the potential for Brinell (surface dent) damage due to shock and vibration loading events during rocket launch. Brinell damage to bearing raceways can lead to torque variations (noise) and reduced bearing life. The growing use of ceramic rolling elements with high stiffness in hybrid bearings exacerbates the situation. A new family of hard yet resilient materials based upon nic...
  • Human Factors Lessons Learned from Flight Testing Wingless Lifting Body Vehicles

    28 Jul 2014 | 10:02 am
    Abstract: Since the 1960s, NASA, the Air Force, and now private industry have attempted to develop an operational human crewed reusable spacecraft with a wingless, lifting body configuration. This type of vehicle offers increased mission flexibility and greater reentry cross range than capsule type craft, and is particularly attractive due to the capability to land on a runway. That capability, however, adds complexity to the human factors engineering requirements of developing such aircraft.
  • Analysis of Low Speed Stall Aerodynamics of a Swept Wing with Laminar Flow Glove

    28 Jul 2014 | 10:02 am
    Abstract: Reynolds-Averaged Navier-Stokes (RANS) computational fluid dynamics (CFD) analysis was conducted to study the low-speed stall aerodynamics of a GIII aircraft's swept wing modified with a laminar-flow wing glove. The stall aerodynamics of the gloved wing were analyzed and compared with the unmodified wing for the flight speed of 120 knots and altitude of 2300 ft above mean sea level (MSL). The Star-CCM+ polyhedral unstructured CFD code was first validated for wing stall predictions using the w...
  • PhoneSat In-flight Experience Results

    28 Jul 2014 | 10:02 am
    Abstract: Over the last decade, consumer technology has vastly improved its performances, become more affordable and reduced its size. Modern day smartphones offer capabilities that enable us to figure out where we are, which way we are pointing, observe the world around us, and store and transmit this information to wherever we want. These capabilities are remarkably similar to those required for multi-million dollar satellites. The PhoneSat project at NASA Ames Research Center is building a series of...
  • Integrated Arrival and Departure Schedule Optimization Under Uncertainty

    28 Jul 2014 | 9:52 am
    Abstract: In terminal airspace, integrating arrivals and departures with shared waypoints provides the potential of improving operational efficiency by allowing direct routes when possible. Incorporating stochastic evaluation as a post-analysis process of deterministic optimization, and imposing a safety buffer in deterministic optimization, are two ways to learn and alleviate the impact of uncertainty and to avoid unexpected outcomes. This work presents a third and direct way to take uncertainty into ...
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    New NASA STI Report Series

  • Adaptive Back Sheet Material for Acoustic Liner Applications-ARMD Seedling Fund Phase I Final Report

    28 Jul 2014 | 12:22 am
    Abstract: A recently developed piezo-electric composite film is evaluated for its usefulness in application in acoustic liners. Researchers at the NASA Langley Research Center Liner Technology Facility developed experiments to measure the electrical response of the material to acoustic excitation and the vibrational response of the material to electrical excitation. The robustness of the piezo-electric film was also assessed. The material's electrical response to acoustic excitation is found to be comp...
  • Terminal Area Simulation System User's Guide - Version 10.0

    25 Jul 2014 | 10:39 am
    Abstract: The Terminal Area Simulation System (TASS) is a three-dimensional, time-dependent, large eddy simulation model that has been developed for studies of wake vortex and weather hazards to aviation, along with other atmospheric turbulence, and cloud-scale weather phenomenology. This document describes the source code for TASS version 10.0 and provides users with needed documentation to run the model. The source code is programed in Fortran language and is formulated to take advantage of vector an...
  • Investigation and Development of Control Laws for the NASA Langley Research Center Cockpit Motion Facility

    25 Jul 2014 | 9:59 am
    Abstract: The ability to develop highly advanced simulators is a critical need that has the ability to significantly impact the aerospace industry. The aerospace industry is advancing at an ever increasing pace and flight simulators must match this development with ever increasing urgency. In order to address both current problems and potential advancements with flight simulator techniques, several aspects of current control law technology of the National Aeronautics and Space Administration (NASA) Lan...
  • Nonlinear Aeroelastic Analysis of the HIAD TPS Coupon in the NASA 8' High Temperature Tunnel: Theory and Experiment

    25 Jul 2014 | 9:39 am
    Abstract: The purpose of this work is to develop a set of theoretical and experimental techniques to characterize the aeroelasticity of the thermal protection system (TPS) on the NASA Hypersonic Inflatable Aerodynamic Decelerator (HIAD). A square TPS coupon experiences trailing edge oscillatory behavior during experimental testing in the 8' High Temperature Tunnel (HTT), which may indicate the presence of aeroelastic flutter. Several theoretical aeroelastic models have been developed, each correspondin...
  • 70 Years of Aeropropulsion Research at NASA Glenn Research Center

    24 Jul 2014 | 3:40 am
    Abstract: This paper presents a brief overview of air-breathing propulsion research conducted at the NASA Glenn Research Center (GRC) over the past 70 years. It includes a historical perspective of the center and its various stages of propulsion research in response to the countrys different periods of crises and growth opportunities. GRCs research and technology development covered a broad spectrum, from a short-term focus on improving the energy efficiency of aircraft engines to advancing the frontie...
 
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    NASACast: This Week @ NASA Video

  • This Week @ NASA, July 25, 2014

    National Aeronautics and Space Administration (NASA)
    25 Jul 2014 | 9:00 am
    Apollo 11 celebration, Next Giant Leap anticipation, ISS astronauts appear in the House and more...
  • This Week @ NASA, July 18, 2014

    National Aeronautics and Space Administration (NASA)
    18 Jul 2014 | 9:00 am
    Apollo 11 yesterday, Next Giant Leap tomorrow, Science instruments for Europa mission, and more...
  • This Week @ NASA, July 11, 2014

    National Aeronautics and Space Administration (NASA)
    11 Jul 2014 | 9:00 am
    Aquarius maps soil moisture, SLS Core Preliminary Design Review, and more...
  • This Week @ NASA, July 4, 2014

    National Aeronautics and Space Administration (NASA)
    3 Jul 2014 | 9:00 am
    Carbon observing mission launches, Saucer-shaped vehicle tested, and more...
  • This Week @ NASA, June 27, 20214

    National Aeronautics and Space Administration (NASA)
    27 Jun 2014 | 9:00 am
    NASA, 50 years after The Civil Rights Act, Orion Chute Test, Cryogenic tank and 3D printer and more...
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    NASA Edge

  • NASA EDGE: OCO-2 Launch

    National Aeronautics and Space Administration (NASA)
    25 Jul 2014 | 9:00 am
    NASA EDGE webcasts live from Vandenberg AFB for the launch of the Orbiting Carbon Observatory-2 (OCO) launch.
  • NASA EDGE: SpaceX-3

    National Aeronautics and Space Administration (NASA)
    29 May 2014 | 9:00 am
    NASA EDGE checks out the experiments heading to the International Space Station and the CubeSats being launched during SpaceX's 3rd resupply mission.
  • NASA EDGE: MMS One Step Closer to Launch

    National Aeronautics and Space Administration (NASA)
    26 Mar 2014 | 9:00 am
    NASA EDGE talks with the MMS Team about the final tests for the satellites before they head to NASA Kennedy.
  • NASA EDGE: TDRS-L Launch

    National Aeronautics and Space Administration (NASA)
    6 Mar 2014 | 8:00 am
    NASA EDGE talks Space Communication and Navigation while covering the TDRS-L Launch atop the Vehicle Assembly Building at NASA Kennedy Space Center.
  • NASA EDGE: Launching CUNYSAT-1

    National Aeronautics and Space Administration (NASA)
    18 Feb 2014 | 8:00 am
    NASA EDGE covers the ELaNa II launch and speaks to Medgar Evers students about launching CUNYSAT-1; their first CubeSat.
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    NASACast Video

  • Space to Ground: Coming and Going

    National Aeronautics and Space Administration (NASA)
    25 Jul 2014 | 9:00 am
    One station cargo ship leaves, another arrives, aquatic research and commercial spinoffs. Questions or comments? Use #spacetoground to talk to us.
  • NASA EDGE: OCO-2 Launch

    National Aeronautics and Space Administration (NASA)
    25 Jul 2014 | 9:00 am
    NASA EDGE webcasts live from Vandenberg AFB for the launch of the Orbiting Carbon Observatory-2 (OCO) launch.
  • This Week @ NASA, July 25, 2014

    National Aeronautics and Space Administration (NASA)
    25 Jul 2014 | 9:00 am
    Apollo 11 celebration, Next Giant Leap anticipation, ISS astronauts appear in the House and more...
  • This Week @ NASA, July 18, 2014

    National Aeronautics and Space Administration (NASA)
    18 Jul 2014 | 9:00 am
    Apollo 11 yesterday, Next Giant Leap tomorrow, Science instruments for Europa mission, and more...
  • Space to Ground: Special Delivery

    National Aeronautics and Space Administration (NASA)
    17 Jul 2014 | 9:00 am
    Cygnus delivers cargo, upgrades for Robonaut and playing with fire. Questions or comments? Use #spacetoground to talk to us.
 
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    NASACast Audio

  • This Week @ NASA, July 25, 2014

    National Aeronautics and Space Administration (NASA)
    25 Jul 2014 | 9:00 am
    Apollo 11 celebration, Next Giant Leap anticipation, ISS astronauts appear in the House and more...
  • This Week @ NASA, July 18, 2014

    National Aeronautics and Space Administration (NASA)
    18 Jul 2014 | 9:00 am
    Apollo 11 yesterday, Next Giant Leap tomorrow, Science instruments for Europa mission, and more...
  • This Week @ NASA, July 11, 2014

    National Aeronautics and Space Administration (NASA)
    11 Jul 2014 | 9:00 am
    Aquarius maps soil moisture, SLS Core Preliminary Design Review, and more...
  • This Week @ NASA, July 4, 2014

    National Aeronautics and Space Administration (NASA)
    3 Jul 2014 | 9:00 am
    Carbon observing mission launches, Saucer-shaped vehicle tested, and more...
  • This Week @ NASA, June 27, 20214

    National Aeronautics and Space Administration (NASA)
    27 Jun 2014 | 9:00 am
    NASA, 50 years after The Civil Rights Act, Orion Chute Test, Cryogenic tank and 3D printer and more...
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    NASACast: This Week @NASA Audio

  • This Week @ NASA, July 25, 2014

    National Aeronautics and Space Administration (NASA)
    25 Jul 2014 | 9:00 am
    “Here’s some of the stories trending This Week at NASA!” Apollo 11 celebration, Next Giant Leap anticipation
  • This Week @ NASA, July 18, 2014

    National Aeronautics and Space Administration (NASA)
    18 Jul 2014 | 9:00 am
    “Here’s some of the stories trending This Week at NASA!” Apollo 11 yesterday, Next Giant Leap tomorrow “Houston, Tranquility Base here – the Eagle has landed.”
  • This Week @ NASA, July 11, 2014

    National Aeronautics and Space Administration (NASA)
    11 Jul 2014 | 9:00 am
    “Here’s some of the stories trending This Week at NASA!” Orbital-2 mission underway
  • This Week @ NASA, July 4, 2014

    National Aeronautics and Space Administration (NASA)
    3 Jul 2014 | 9:00 am
    “Here’s some of the stories trending This Week at NASA!” Carbon observing mission launches
  • This Week @ NASA, June 27, 20214

    National Aeronautics and Space Administration (NASA)
    27 Jun 2014 | 9:00 am
    “Here’s some of the stories trending This Week at NASA!” NASA, 50 years after The Civil Rights Act
  • add this feed to my.Alltop

    NASA Image of the Day

  • Solar Dynamics Observatory Captures Images of Lunar Transit

    29 Jul 2014 | 9:00 am
    On July 26, 2014, from 10:57 a.m. to 11:42 a.m. EDT, the moon crossed between NASA’s Solar Dynamics Observatory (SDO) and the sun, a phenomenon called a lunar transit. A lunar transit happens approximately twice a year, causing a partial solar eclipse that can only be seen from SDO's point of view. Images of the eclipse show a crisp lunar horizon, because the moon has no atmosphere that would distort light. This image shows the blended result of two SDO wavelengths - one in 304 wavelength and another in 171 wavelength. Image Credit: NASA/SDO
  • Tethys in Sunlight

    28 Jul 2014 | 9:00 am
    Tethys, like many moons in the solar system, keeps one face pointed towards the planet around which it orbits. Tethys' anti-Saturn face is seen here, fully illuminated, basking in sunlight. On the right side of the moon in this image is the huge crater Odysseus. The Odysseus crater is 280 miles (450 kilometers) across while Tethys is 660 miles (1,062 kilometers) across. See PIA07693 for a closer view and more information on the Odysseus crater. This view looks toward the anti-Saturn side of Tethys. North on Tethys is up and rotated 33 degrees to the right. The image was taken in visible light…
  • NASA's Webb Sunshield Stacks Up to Test!

    25 Jul 2014 | 9:00 am
    The Sunshield on NASA's James Webb Space Telescope is the largest part of the observatory—five layers of thin membrane that must unfurl reliably in space to precise tolerances. Last week, for the first time, engineers stacked and unfurled a full-sized test unit of the Sunshield and it worked perfectly. The Sunshield is about the length of a tennis court, and will be folded up like an umbrella around the Webb telescope’s mirrors and instruments during launch. Once it reaches its orbit, the Webb telescope will receive a command from Earth to unfold, and separate the Sunshield's five layers…
  • President Nixon Greets the Returning Apollo 11 Astronauts

    24 Jul 2014 | 9:00 am
    The Apollo 11 astronauts, left to right, Commander Neil A. Armstrong, Command Module Pilot Michael Collins and Lunar Module Pilot Edwin E. "Buzz" Aldrin Jr., inside the Mobile Quarantine Facility aboard the USS Hornet, listen to President Richard M. Nixon on July 24, 1969 as he welcomes them back to Earth and congratulates them on the successful mission. The astronauts had splashed down in the Pacific Ocean at 12:50 p.m. EDT about 900 miles southwest of Hawaii. Apollo 11 launched from Cape Kennedy on July 16, 1969, carrying the astronauts into an initial Earth-orbit of 114 by 116 miles. An…
  • Fifteen Years Ago, Chandra X-Ray Observatory Deployed by Space Shuttle Crew

    23 Jul 2014 | 9:00 am
    On July 23, 1999, a little more than seven hours after Space Shuttle Columbia and its five astronauts were launched from the Kennedy Space Center, NASA's Chandra X-Ray Observatory was successfully deployed by the STS-93 crew. Chandra was spring-ejected from a cradle in the shuttle’s cargo bay at 6:47 a.m. Central time, as Columbia flew over the Indonesian island chain. Commander Eileen Collins, the first female Shuttle Commander, maneuvered Columbia to a safe distance away from the telescope as an internal timer counted down to the first of a two-phase ignition of the solid-fuel Inertial…
 
  • add this feed to my.Alltop

    NASA Image of the Day

  • Solar Dynamics Observatory Captures Images of Lunar Transit

    29 Jul 2014 | 9:00 am
    On July 26, 2014, from 10:57 a.m. to 11:42 a.m. EDT, the moon crossed between NASA’s Solar Dynamics Observatory (SDO) and the sun, a phenomenon called a lunar transit. A lunar transit happens approximately twice a year, causing a partial solar eclipse that can only be seen from SDO's point of view. Images of the eclipse show a crisp lunar horizon, because the moon has no atmosphere that would distort light. This image shows the blended result of two SDO wavelengths - one in 304 wavelength and another in 171 wavelength. Image Credit: NASA/SDO
  • Tethys in Sunlight

    28 Jul 2014 | 9:00 am
    Tethys, like many moons in the solar system, keeps one face pointed towards the planet around which it orbits. Tethys' anti-Saturn face is seen here, fully illuminated, basking in sunlight. On the right side of the moon in this image is the huge crater Odysseus. The Odysseus crater is 280 miles (450 kilometers) across while Tethys is 660 miles (1,062 kilometers) across. See PIA07693 for a closer view and more information on the Odysseus crater. This view looks toward the anti-Saturn side of Tethys. North on Tethys is up and rotated 33 degrees to the right. The image was taken in visible light…
  • NASA's Webb Sunshield Stacks Up to Test!

    25 Jul 2014 | 9:00 am
    The Sunshield on NASA's James Webb Space Telescope is the largest part of the observatory—five layers of thin membrane that must unfurl reliably in space to precise tolerances. Last week, for the first time, engineers stacked and unfurled a full-sized test unit of the Sunshield and it worked perfectly. The Sunshield is about the length of a tennis court, and will be folded up like an umbrella around the Webb telescope’s mirrors and instruments during launch. Once it reaches its orbit, the Webb telescope will receive a command from Earth to unfold, and separate the Sunshield's five layers…
  • President Nixon Greets the Returning Apollo 11 Astronauts

    24 Jul 2014 | 9:00 am
    The Apollo 11 astronauts, left to right, Commander Neil A. Armstrong, Command Module Pilot Michael Collins and Lunar Module Pilot Edwin E. "Buzz" Aldrin Jr., inside the Mobile Quarantine Facility aboard the USS Hornet, listen to President Richard M. Nixon on July 24, 1969 as he welcomes them back to Earth and congratulates them on the successful mission. The astronauts had splashed down in the Pacific Ocean at 12:50 p.m. EDT about 900 miles southwest of Hawaii. Apollo 11 launched from Cape Kennedy on July 16, 1969, carrying the astronauts into an initial Earth-orbit of 114 by 116 miles. An…
  • Fifteen Years Ago, Chandra X-Ray Observatory Deployed by Space Shuttle Crew

    23 Jul 2014 | 9:00 am
    On July 23, 1999, a little more than seven hours after Space Shuttle Columbia and its five astronauts were launched from the Kennedy Space Center, NASA's Chandra X-Ray Observatory was successfully deployed by the STS-93 crew. Chandra was spring-ejected from a cradle in the shuttle’s cargo bay at 6:47 a.m. Central time, as Columbia flew over the Indonesian island chain. Commander Eileen Collins, the first female Shuttle Commander, maneuvered Columbia to a safe distance away from the telescope as an internal timer counted down to the first of a two-phase ignition of the solid-fuel Inertial…
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