<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>New NASA STI</title><link>http://www.sti.nasa.gov</link><description><![CDATA[Today's Listing of New NASA STI in the NASA Aeronautics and Space Database.]]></description><language>en-us</language><lastBuildDate>Wed, 19 Jun 2013 06:59:15 GMT</lastBuildDate><atom:link href="http://www.sti.nasa.gov/scan/rss99-01.xml" rel="self" type="application/rss+xml"/><image><title>New NASA STI</title><url>http://www.sti.nasa.gov/3Dmeatball.jpg</url><link>http://www.sti.nasa.gov</link></image><item><title>Out of the Autoclave Fabrication of LaRC[TradeMark] PETI-9 Polyimide Laminates</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013687</link><description><![CDATA[Abstract: The NASA Langley Research Center developed polyimide system, LaRC PETI-9, has successfully been processed into composites by high temperature vacuum assisted resin transfer molding (HT-VARTM). To extend the application of this high use temperature material to other out-of-autoclave (OOA) processing techniques, the fabrication of PETI- 9 laminates was evaluated using only a vacuum bag and oven cure. A LaRC PETI-9 polyimide solution in NMP was prepared and successfully utilized to fabricate uni...]]></description><pubDate>Tue, 18 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013687</guid></item><item><title>Validation of Helicopter Gear Condition Indicators Using Seeded Fault Tests</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013685</link><description><![CDATA[Abstract: A "seeded fault test" in support of a rotorcraft condition based maintenance program (CBM), is an experiment in which a component is tested with a known fault while health monitoring data is collected. These tests are performed at operating conditions comparable to operating conditions the component would be exposed to while installed on the aircraft. Performance of seeded fault tests is one method used to provide evidence that a Health Usage Monitoring System (HUMS) can replace current maint...]]></description><pubDate>Tue, 18 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013685</guid></item><item><title>Impact Testing of Aluminum 2024 and Titanium 6Al-4V for Material Model Development</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013684</link><description><![CDATA[Abstract: One of the difficulties with developing and verifying accurate impact models is that parameters such as high strain rate material properties, failure modes, static properties, and impact test measurements are often obtained from a variety of different sources using different materials, with little control over consistency among the different sources. In addition there is often a lack of quantitative measurements in impact tests to which the models can be compared. To alleviate some of these p...]]></description><pubDate>Tue, 18 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013684</guid></item><item><title>Effects of Microstructural Parameters on Creep of Nickel-Base Superalloy Single Crystals</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013683</link><description><![CDATA[Abstract: Microstructure-sensitive creep models have been developed for Ni-base superalloy single crystals. Creep rupture testing was conducted on fourteen single crystal alloys at two applied stress levels at each of two temperatures, 982 and 1093 C. The variation in creep lives among the different alloys could be explained with regression models containing relatively few microstructural parameters. At 982 C, gamma-gamma prime lattice mismatch, gamma prime volume fraction, and initial gamma prime size...]]></description><pubDate>Tue, 18 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013683</guid></item><item><title>A Universal Scaling for the Energetics of Relativistic Jets From Black Hole Systems</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013679</link><description><![CDATA[Abstract: Black holes generate collimated, relativistic jets which have been observed in gamma-ray bursts (GRBs), microquasars, and at the center of some galaxies (active galactic nuclei; AGN). How jet physics scales from stellar black holes in GRBs to the supermassive ones in AGNs is still unknown. Here we show that jets produced by AGNs and GRBs exhibit the same correlation between the kinetic power carried by accelerated particles and the gamma-ray luminosity, with AGNs and GRBs lying at the low and...]]></description><pubDate>Tue, 18 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013679</guid></item><item><title>Constraints on the Nature of CID-42: Recoil Kick or Supermassive Black Hole Pair?</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013678</link><description><![CDATA[Abstract: The galaxy CXOC J100043.1+020637, also known as CID-42, is a highly unusual object. An apparent galaxy merger remnant, it displays signatures of both an inspiraling, kiloparsecscale active galactic nucleus (AGN) pair and of a recoiling AGN with a kick velocity approximately greater than 1300 km s(exp -1). Among recoiling AGN candidates, CID-42 alone has both spatial offsets (in optical and X-ray bands) and spectroscopic offsets. In order to constrain the relative likelihood of both scenarios,...]]></description><pubDate>Tue, 18 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013678</guid></item><item><title>Radio Detection of the Fermi-LAT Blind Search Millisecond Pulsar J1311-3430</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013677</link><description><![CDATA[Abstract: We report the detection of radio emission from PSR J1311.3430, the first millisecond pulsar (MSP) discovered in a blind search of Fermi Large Area Telescope (LAT) gamma-ray data. We detected radio pulsations at 2 GHz, visible for less than 10% of approximately 4.5 hr of observations using the Green Bank Telescope (GBT). Observations at 5 GHz with the GBT and at several lower frequencies with Parkes, Nan cay, and the Giant Metrewave Radio Telescope resulted in non-detections. We also report th...]]></description><pubDate>Tue, 18 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013677</guid></item><item><title>One Small Step for Creo Modelers, One Giant Leap for "Grey Beards": Using MBD Methodologies to Launch Astronauts and Hardware to Near-Earth Objects such as Asteroids, the Moon and Mars</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013676</link><description><![CDATA[Abstract: This presentation will focus on the modernization of design and engineering practices through the use of Model Based Definition methodology. By gathering important engineering data into one 3D digital data set, applying model annotations, and setting up model view states directly in the 3D CAD model, model-specific information can be published to Windchill and CreoView for use during the Design Review Process. This presentation will describe the methods that have been incorporated into the mo...]]></description><pubDate>Mon, 17 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013676</guid></item><item><title>Implementing Model-Check for Employee and Management Satisfaction</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013675</link><description><![CDATA[Abstract: This presentation will discuss methods to which ModelCheck can be implemented to not only improve model quality, but also satisfy both employees and management through different sets of quality checks. This approach allows a standard set of modeling practices to be upheld throughout a company, with minimal interaction required by the end user. The presenter will demonstrate how to create multiple ModelCheck standards, preventing users from evading the system, and how it can improve the qualit...]]></description><pubDate>Mon, 17 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013675</guid></item><item><title>Monte-Carlo Simulations of Heavy Ions Track Structures and Applications</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013674</link><description><![CDATA[Abstract: In space, astronauts are exposed to protons, high ]energy heavy (HZE) ions that have a high charge (Z) and energy (E), and secondary radiation, including neutrons and recoil nuclei produced by nuclear reactions in spacecraft walls or in tissue. The astronauts can only be partly shielded from these particles. Therefore, on travelling to Mars, it is estimated that every cell nucleus in an astronaut fs body would be hit by a proton or secondary electron (e.g., electrons of the target atoms ioniz...]]></description><pubDate>Mon, 17 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013674</guid></item><item><title>The Orbital Debris Problem and the Challenges for Environment Remediation</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013673</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Mon, 17 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013673</guid></item><item><title>Frame Structures Made Easy with Creo Parametric's Advanced Framework Extension (AFX)</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013670</link><description><![CDATA[Abstract: Creo Parametric 2.0's Advanced Framework Extension (AFX, formerly known as EFX) is a powerful add-on that allows users to rapidly model frame structures with ease. This presentation will briefly demonstrate how these types of models can be created quickly using AFX, and how it can reduce modeling time through the use of library items. It will also describe how AFX can be installed, configured, and properly administered, including the use of standard and custom shape libraries, along with inco...]]></description><pubDate>Mon, 17 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013670</guid></item><item><title>Windchill-201 - Custom Soft-Type Construction</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013669</link><description><![CDATA[Abstract: This presentation will explain Windchill soft-types-what they are, how they work, and how to construct custom ones, configured specifically for your system. The process and particulars of creating and implementing a WTDocument soft-type will be discussed, and the interaction between soft-types and Windchill objects will be shown.]]></description><pubDate>Mon, 17 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013669</guid></item><item><title>Reference Controls Methodologies for Large Structural Models at Kennedy Space Center</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013668</link><description><![CDATA[Abstract: This presentation will discuss the methodology behind Model Class Definition--the use of separate model assemblies of the same product, at different fidelities, driven by the same skeleton files. These fidelities can be used to convey only the detail that the end user needs, by allowing the end user to pick and choose between model classes for assembly creation. The usefulness of MPA for the Windchill Release Process will be demonstrated, along with its usefulness in minimizing CPU resources ...]]></description><pubDate>Mon, 17 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013668</guid></item><item><title>Hexavalent Chrome Free Coatings for Electronics Applications: Joint Test Report</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013665</link><description><![CDATA[Abstract: The overall objective of the Hexavalent Chrome Free Coatings for Electronics Applications project is to evaluate and test pretreatments not containing hexavalent chrome in avionics and electronics housing applications. This objective will be accomplished by testing strong performing coating systems from prior NASA and DoD testing or new coating systems as determined by the stakeholders.]]></description><pubDate>Fri, 14 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013665</guid></item><item><title>CryoCube-1: A Cryogenic Fluid Management CubeSat</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013661</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Fri, 14 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013661</guid></item><item><title>Master Console System Monitoring and Control Development</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013660</link><description><![CDATA[Abstract: The Master Console internship during the spring of 2013 involved the development of firing room displays at the John F. Kennedy Space Center (KSC). This position was with the Master Console Product Group (MCPG) on the Launch Control System (LCS) project. This project is responsible for the System Monitoring and Control (SMC) and Record and Retrieval (R&R) of launch operations data. The Master Console is responsible for: loading the correct software into each of the remaining consoles in the f...]]></description><pubDate>Fri, 14 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013660</guid></item><item><title>Model to Test Electric Field Comparisons in a Composite Fairing Cavity</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013659</link><description><![CDATA[Abstract: Evaluating the impact of radio frequency transmission in vehicle fairings is important to sensitive spacecraft. This study shows cumulative distribution function (CDF) comparisons of composite a fairing electromagnetic field data obtained by computational electromagnetic 3D full wave modeling and laboratory testing. This work is an extension of the bare aluminum fairing perfect electric conductor (PEC) model. Test and model data correlation is shown.]]></description><pubDate>Fri, 14 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013659</guid></item><item><title>Low Temperature Catalyst for NH3 Removal</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013658</link><description><![CDATA[Abstract: Air revitalization technologies maintain a safe atmosphere inside spacecraft by the removal of C02, ammonia (NH3), and trace contaminants. NH3 onboard the International Space Station (ISS) is produced by crew metabolism, payloads, or during an accidental release of thermal control refrigerant. Currently, the ISS relies on removing NH3 via humidity condensate and the crew wears hooded respirators during emergencies. A different approach to cabin NH3 removal is to use selective catalytic oxidat...]]></description><pubDate>Thu, 13 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013658</guid></item><item><title>Microbial Monitoring of Common Opportunistic Pathogens by Comparing Multiple Real-Time PCR Platforms for Potential Space Applications</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013657</link><description><![CDATA[Abstract: Because the International Space Station is a closed environment with rotations of astronauts and equipment that each introduce their own microbial flora, it is necessary to monitor the air, surfaces, and water for microbial contamination. Current microbial monitoring includes labor- and time-intensive methods to enumerate total bacterial and fungal cells, with limited characterization, during in-flight testing. Although this culture-based method is sufficient for monitoring the International ...]]></description><pubDate>Thu, 13 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013657</guid></item><item><title>Defining the Relationship between Biomarkers of Oxidative and Inflammatory Stress and the Risk for Atherosclerosis in Astronauts during and after Long-Duration Spaceflight</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013653</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Wed, 12 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013653</guid></item><item><title>Suitport Feasibility - Human Pressurized Space Suit Donning Tests with the Marman Clamp and Pneumatic Flipper Suitport Concepts</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013652</link><description><![CDATA[Abstract: The suitport concept has been recently implemented as part of the small pressurized lunar rover (Currently the Space Exploration vehicle, or SEV) and the Multi-Mission Space Exploration Vehicle (MMSEV) concept demonstrator vehicle. Suitport replaces or augments the traditional airlock function of a spacecraft by providing a bulkhead opening, capture mechanism, and sealing system to allow ingress and egress of a space suit while the space suit remains outside of the pressurized volume of the s...]]></description><pubDate>Wed, 12 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013652</guid></item><item><title>Sampling and Analysis of Impact Crater Residues Found on the Wide Field Planetary Camera-2 Radiator</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013651</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Wed, 12 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013651</guid></item><item><title>Requirements, Resource Planning, and Management for Decrewing/Recrewing Scenarios of the International Space Station</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013650</link><description><![CDATA[Abstract: Following the failure of 44 Progress (44P) on launch in August 2011, and the subsequent grounding of all Russian Soyuz rocket based launches, the International Space Station (ISS) ground teams engaged in an effort to determine how long the ISS could remain crewed, what would be required to safely configure the ISS for decrewing, and what would be required to recrew the ISS upon resumption of Soyuz rocket launches if decrewing became necessary. This White Paper was written to capture the proce...]]></description><pubDate>Wed, 12 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013650</guid></item><item><title>The Micro-Arcsecond Scintillation-Induced Variability (MASIV) Survey III. Optical Identifications and New Redshifts</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013649</link><description><![CDATA[Abstract: Intraday variability (IDV) of the radio emission from active galactic nuclei is now known to be predominantly due to interstellar scintillation (ISS). The MASIV (The Microarcsecond Scintillation Induced Variability) survey of 443 at spectrum sources revealed that the IDV is related to the radio flux density and redshift. A study of the physical properties of these sources has been severely handicapped by the absence of reliable redshift measurements for many of these objects. This paper prese...]]></description><pubDate>Wed, 12 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013649</guid></item><item><title>Techniques for Targeted Fermi-GBM Follow-Up of Gravitational-Wave Events</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013645</link><description><![CDATA[Abstract: The Advanced LIGO and Advanced Virgo ground-based gravitational-wave (GW) detectors are projected to come online 2015 2016, reaching a final sensitivity sufficient to observe dozens of binary neutron star mergers per year by 2018. We present a fully-automated, targeted search strategy for prompt gamma-ray counterparts in offline Fermi-GBM data. The multi-detector method makes use of a detailed model response of the instrument, and benefits from time and sky location information derived from t...]]></description><pubDate>Wed, 12 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013645</guid></item><item><title>Photoionization Modeling of Oxygen K Absorption in the Interstellar Medium: The Chandra Grating Spectra of XTE J1817-330</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013641</link><description><![CDATA[Abstract: We present detailed analyses of oxygen K absorption in the interstellar medium (ISM) using four high-resolution Chandra spectra towards the X-ray low-mass binary XTE J1817-330. The 11-25 A broadband is described with a simple absorption model that takes into account the pileup effect and results in an estimate of the hydrogen column density. The oxygen K-edge region (21-25 A) is fitted with the physical warmabs model, which is based on a photoionization model grid generated with the XSTAR cod...]]></description><pubDate>Tue, 11 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013641</guid></item><item><title>The Ultraviolet Radiation Environment around M Dwarf Exoplanet Host Stars</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013639</link><description><![CDATA[Abstract: The spectral and temporal behavior of exoplanet host stars is a critical input to models of the chemistry and evolution of planetary atmospheres. Ultraviolet photons influence the atmospheric temperature profiles and production of potential biomarkers on Earth-like planets around these stars. At present, little observational or theoretical basis exists for understanding the ultraviolet spectra of M dwarfs, despite their critical importance to predicting and interpreting the spectra of potenti...]]></description><pubDate>Tue, 11 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013639</guid></item><item><title>Carbon Isotopic Composition of CO2 Evolved During Perchlorate-Induced Reactions in Mars Analog Materials: Interpreting SAM/MSL Rocknest Data</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013638</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Tue, 11 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013638</guid></item><item><title>Subsurface In Situ Elemental Composition Measurements with PING</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013637</link><description><![CDATA[Abstract: This paper describes the Probing In situ with Neutron and Gamma rays (PING) instrument, that can measure the subsurface elemental composition in situ for any rocky body in the solar system without the need for digging into the surface. PING consists of a Pulsed Neutron Generator (PNG), a gamma ray spectrometer and neutron detectors. Subsurface elements are stimulated by high-energy neutrons to emit gamma rays at characteristic energies. This paper will show how the detection of these gamma ra...]]></description><pubDate>Tue, 11 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013637</guid></item><item><title>Heavy Noble Gas Measurements on Mars with SAM</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013635</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Mon, 10 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013635</guid></item><item><title>The Radial Distribution of Star Formation in Galaxies at Z approximately 1 from the 3D-HST Survey</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013631</link><description><![CDATA[Abstract: The assembly of galaxies can be described by the distribution of their star formation as a function of cosmic time. Thanks to the WFC3 grism on the Hubble Space Telescope (HST) it is now possible to measure this beyond the local Universe. Here we present the spatial distribution of H emission for a sample of 54 strongly star-forming galaxies at z 1 in the 3D-HST Treasury survey. By stacking the H emission, we find that star formation occurred in approximately exponential distributions at z ap...]]></description><pubDate>Mon, 10 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013631</guid></item><item><title>STIS Coronagraphy</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013630</link><description><![CDATA[Abstract: HST Coronagraphs HST has supported 3 coronagraphs: NICMOS, ACS, and STIS. Bulk of image properties are set by the OTA, but instrumental effects are also present. None of the HST coronagraphs have been optimal:ACS spot size issues, NICMOS parts moving in dewar, STIS incomplete apodization, and lack of peakdown software.]]></description><pubDate>Mon, 10 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013630</guid></item><item><title>Compound-Specific Isotopic Ratios of Amino Acids in CM and CR Chondrites</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013629</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Mon, 10 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013629</guid></item><item><title>Spacecraft Bus and Platform Technology Development under the NASA ISPT Program</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013628</link><description><![CDATA[Abstract: The In-Space Propulsion Technology (ISPT) program is developing spacecraft bus and platform technologies that will enable or enhance NASA robotic science missions. The ISPT program is currently developing technology in four areas that include Propulsion System Technologies (electric and chemical), Entry Vehicle Technologies (aerocapture and Earth entry vehicles), Spacecraft Bus and Sample Return Propulsion Technologies (components and ascent vehicles), and Systems/Mission Analysis. Three tech...]]></description><pubDate>Mon, 10 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013628</guid></item><item><title>Swift J045106.8-694803: A Highly Magnetised Neutron Star in the Large Magellanic Cloud</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013626</link><description><![CDATA[Abstract: We report the analysis of a highly magnetised neutron star in the Large Magellanic Cloud (LMC). The high mass X-ray binary pulsar Swift J045106.8-694803 has been observed with Swift X-ray telescope (XRT) in 2008, The Rossi X-ray Timing Explorer (RXTE) in 2011 and the X-ray Multi-Mirror Mission - Newton (XMM-Newton) in 2012. The change in spin period over these four years indicates a spin-up rate of 5.010.06 s/yr, amongst the highest observed for an accreting pulsar. This spin-up rate can be a...]]></description><pubDate>Fri, 07 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013626</guid></item><item><title>Perspectives on Intracluster Enrichment and the Stellar Initial Mass Function in Elliptical Galaxies</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013624</link><description><![CDATA[Abstract: The amount of metals in the Intracluster Medium (ICM) in rich galaxy clusters exceeds that expected based on the observed stellar population by a large factor. We quantify this discrepancy--which we term the "cluster elemental abundance paradox"--and investigate the required properties of the ICM-enriching population. The necessary enhancement in metal enrichment may, in principle, originate in the observed stellar population if a larger fraction of stars in the supernova-progenitor mass rang...]]></description><pubDate>Fri, 07 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013624</guid></item><item><title>Reflectance Spectra Diversity of Silica-Rich Materials: Sensitivity to Environment and Implications for Detections on Mars</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013618</link><description><![CDATA[Abstract: Hydrated silica-rich materials have recently been discovered on the surface of Mars by the Mars Exploration Rover (MER) Spirit, the Mars Reconnaissance Orbiter (MRO) Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), and the Mars Express Observatoire pour la Mineralogie, l'Eau, les Glaces, et l'Activite'(OMEGA) in several locations. Having been interpreted as hydrothermal deposits and aqueous alteration products, these materials have important implications for the history of water ...]]></description><pubDate>Thu, 06 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013618</guid></item><item><title>Widespread Weathered Glass on the Surface of Mars</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013617</link><description><![CDATA[Abstract: Low albedo sediments cover >10(exp 7) sq km in the northern lowlands of Mars, but the composition and origin of these widespread deposits have remained ambiguous despite many previous investigations. Here we use near-infrared spectra acquired by the Mars Express OMEGA (Observatoire pour la Mineralogie, l'Eau, les Glaces, et l'Activite') imaging spectrometer to show that these sediments exhibit spectral characteristics that are consistent with both high abundances of iron-bearing glass and sil...]]></description><pubDate>Thu, 06 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013617</guid></item><item><title>Seasonally Active Slipface Avalanches in the North Polar Sand Sea of Mars: Evidence for a Wind-Related Origin</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013616</link><description><![CDATA[Abstract: Meter-scale MRO/HiRISE camera images of dune slipfaces in the north polar sand sea of Mars reveal the presence of deep alcoves above depositional fans. These features are apparently active under current climatic conditions, because they form between observations taken in subsequent Mars years. Recently, other workers have hypothesized that the alcoves form due to destabilization and mass-wasting during sublimation of CO2 frost in the spring. While there is evidence for springtime modification...]]></description><pubDate>Thu, 06 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013616</guid></item><item><title>Space Studies Board Annual Report 2012</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013615</link><description><![CDATA[Abstract: The Space Studies Board (SSB) was established in 1958 to serve as the focus of the interests and responsibilities in space research for the National Academies. The SSB provides an independent, authoritative forum for information and advice on all aspects of space science and applications, and it serves as the focal point within the National Academies for activities on space research. It oversees advisory studies and program assessments, facilitates international research coordination, and pro...]]></description><pubDate>Thu, 06 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013615</guid></item><item><title>Revised Thickness of the Lunar Crust from GRAIL Data: Implications for Lunar Bulk Composition</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013613</link><description><![CDATA[Abstract: High-resolution gravity data from GRAIL have yielded new estimates of the bulk density and thickness of the lunar crust. The bulk density of the highlands crust is 2550 kg m-3. From a comparison with crustal composition measured remotely, this density implies a mean porosity of 12%. With this bulk density and constraints from the Apollo seismic experiment, the average global crustal thickness is found to lie between 34 and 43 km, a value 10 to 20 km less than several previous estimates. Crust...]]></description><pubDate>Thu, 06 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013613</guid></item><item><title>Multi-Partner Experiment to Test Volcanic-Ash Ingestion by a Jet Engine</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013612</link><description><![CDATA[Abstract: A research team of U.S. Government agencies and engine manufacturers are designing an experiment to test volcanic-ash ingestion by a NASA owned F117 engine that was donated by the U.S. Air Force. The experiment is being conducted under the auspices of NASA s Vehicle Integrated Propulsion Research (VIPR) Program and will take place in early 2014 at Edwards AFB in California as an on-ground, on-wing test. The primary objectives are to determine the effect on the engine of several hours of expos...]]></description><pubDate>Thu, 06 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013612</guid></item><item><title>What Do Millimeter Continuum and Spectral Line Observations Tell Us about Solar System Bodies?</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013609</link><description><![CDATA[Abstract: Solar system objects are generally cold and radiate at low frequencies and tend to have strong molecular rotational transitions. Millimeter continuum and spectral line observations provide detailed information for nearly all solar system bodies. At these wavelengths, details of the bulk physical composition of icy surfaces, the size and albedo of small objects, the composition of planetary atmospheres can be measured as well as monitoring of time variable phenomena for extended periods (not r...]]></description><pubDate>Wed, 05 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013609</guid></item><item><title>First-Time Analysis of Completely Restored DTREM Instrument Data from Apollo 14 and 15</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013608</link><description><![CDATA[Abstract: The Dust, Thermal and Radiation Engineering Measurement (DTREM) packages (figure 1) mounted on the central stations of the Apollo 11, 12, 14, and 15 ALSEPs (Apollo Lunar Surface Experiments Packages) measured the outputs of exposed solar cells and thermistors over time. The goal of the experiment, also commonly known as the dust detector, was to study the long-term effects of dust, radiation, and temperature at the lunar surface on solar cells. The monitors returned data for up to almost 8 ye...]]></description><pubDate>Wed, 05 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013608</guid></item><item><title>Capabilities of Gamma Ray and Neutron Spectrometers for Studying Trojan Asteroid Composition</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013607</link><description><![CDATA[Abstract: A Trojan Tour and Rendezvous mission was specifically targeted by the 2011 Planetary Decadal Survey Committee as a high priority mission for the New Frontiers program.]]></description><pubDate>Wed, 05 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013607</guid></item><item><title>Method for Estimating Operational Loads on Aerospace Structures Using Span-Wisely Distributed Surface Strains</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013606</link><description><![CDATA[Abstract: This report presents a new method for estimating operational loads (bending moments, shear loads, and torques) acting on slender aerospace structures using distributed surface strains (unidirectional strains). The surface strain-sensing stations are to be evenly distributed along each span-wise strain-sensing line. A depth-wise cross section of the structure along each strain-sensing line can then be considered as an imaginary embedded beam. The embedded beam was first evenly divided into mul...]]></description><pubDate>Wed, 05 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013606</guid></item><item><title>NASA Facts: Nanosatellite Launch Adapter System (NLAS)</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013602</link><description><![CDATA[Abstract: The Nanosatellite Launch Adapter System (NLAS) was developed to increase access to space while simplifying the integration process of miniature satellites, called nanosats or cubesats, onto launch vehicles. A standard cubesat measures about 4inches (10 cm) long, 4 inches wide,and 4 inches high, and is called a one-unit (1U) cubesat. A single NLAS provides the capability to deploy 24U of cubesats. The system is designed to accommodate satellites measuring 1U, 1.5U, 2U, 3U and 6U sizes for depl...]]></description><pubDate>Wed, 05 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013602</guid></item><item><title>Applying Model Based Systems Engineering to NASA's Space Communications Networks</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013600</link><description><![CDATA[Abstract: System engineering practices for complex systems and networks now require that requirement, architecture, and concept of operations product development teams, simultaneously harmonize their activities to provide timely, useful and cost-effective products. When dealing with complex systems of systems, traditional systems engineering methodology quickly falls short of achieving project objectives. This approach is encumbered by the use of a number of disparate hardware and software tools, sprea...]]></description><pubDate>Tue, 04 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013600</guid></item><item><title>Physical and Chemical Toeholds for Exoplanet Bioastronomy</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013599</link><description><![CDATA[Abstract: If a search for exoplanet life were mounted today, the likely focus would be to detect oxygen (or ozone) in the atmosphere of a water-bearing rocky planet orbiting roughly 1AU from a G-type star. This appropriately conservative and practical default is necessary in large part because biological input on the question of where and how to look for life has progressed little beyond a purely empirical reliance on the example of terrestrial biology. However, fundamental physical and chemical consid...]]></description><pubDate>Tue, 04 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013599</guid></item><item><title>Single-Pilot Workload Management</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013598</link><description><![CDATA[Abstract: Integrated glass cockpit systems place a heavy cognitive load on pilots (Burian Dismukes, 2007). Researchers from the NASA Ames Flight Cognition Lab and the FAA Flight Deck Human Factors Lab examined task and workload management by single pilots. This poster describes pilot performance regarding programming a reroute while at cruise and meeting a waypoint crossing restriction on the initial descent.]]></description><pubDate>Mon, 03 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013598</guid></item><item><title>Structural Analysis Peer Review for the Static Display of the Orbiter Atlantis at the Kennedy Space Center Visitors Center</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013597</link><description><![CDATA[Abstract: Mr. Christopher Miller with the Kennedy Space Center (KSC) NASA Safety & Mission Assurance (S&MA) office requested the NASA Engineering and Safety Center's (NESC) technical support on March 15, 2012, to review and make recommendations on the structural analysis being performed for the Orbiter Atlantis static display at the KSC Visitor Center. The principal focus of the assessment was to review the engineering firm's structural analysis for lifting and aligning the orbiter and its static displ...]]></description><pubDate>Mon, 03 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013597</guid></item><item><title>NextGen Operational Improvements: Will they Improve Human Performance</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013594</link><description><![CDATA[Abstract: Modernization of the National Airspace System depends critically on the development of advanced technology, including cutting-edge automation, controller decision-support tools and integrated on-demand information. The Next Generation Air Transportation System national plan envisions air traffic control tower automation that proposes solutions for seven problems: 1) departure metering, 2) taxi routing, 3) taxi and runway scheduling, 4) departure runway assignments, 5) departure flow managemen...]]></description><pubDate>Mon, 03 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013594</guid></item><item><title>Composite Crew Module (CCM) Permeability Characterization</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013592</link><description><![CDATA[Abstract: In January 2007, the NASA Administrator chartered the NASA Engineering and Safety Center (NESC) to form an Agency team to design and build a composite crew module in 18 months in order to gain hands-on experience in anticipation that future exploration systems may be made of composite materials. One of the conclusions from this Composite Crew Module Primary Structure assessment was that there was a lack of understanding regarding the ability for composite pressure shells to contain consumable...]]></description><pubDate>Mon, 03 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013592</guid></item><item><title>Lessons of History: Organizational Factors in Three Aviation Mishaps</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013591</link><description><![CDATA[Abstract: This presentation examines organizational factors that contributed to three aircraft mishaps and provides analysis of lessons learned. Three historical aviation mishaps were studied from a human factors perspective, and organizational factors identified and analyzed. These case studies provide valuable lessons for understanding the interaction of people with aircraft systems and with each other during flight operations.]]></description><pubDate>Mon, 03 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013591</guid></item><item><title>Composite Materials With Uncured Epoxy Matrix Exposed in Stratosphere During NASA Stratospheric Balloon Flight</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013590</link><description><![CDATA[Abstract: A cassette of uncured composite materials with epoxy resin matrixes was exposed in the stratosphere (40 km altitude) over three days. Temperature variations of -76 to 32.5C and pressure up to 2.1 torr were recorded during flight. An analysis of the chemical structure of the composites showed, that the polymer matrix exposed in the stratosphere becomes crosslinked, while the ground control materials react by way of polymerization reaction of epoxy groups. The space irradiations are considered ...]]></description><pubDate>Mon, 03 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013590</guid></item><item><title>Equilibrium Limit of Boundary Scattering in Carbon Nanostructures: Molecular Dynamics Calculations of Thermal Transport</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013589</link><description><![CDATA[Abstract: It is widely known that graphene and many of its derivative nanostructures have exceedingly high reported thermal conductivities (up to 4000 W/mK at 300 K). Such attractive thermal properties beg the use of these structures in practical devices; however, to implement these materials while preserving transport quality, the influence of structure on thermal conductivity should be thoroughly understood. For graphene nanostructures, having average phonon mean free paths on the order of one micron...]]></description><pubDate>Mon, 03 Jun 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013589</guid></item><item><title>Toxicological Assessment of ISS Air Quality: Contingency Sampling - February 2013</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013588</link><description><![CDATA[Abstract: Two grab sample containers (GSCs) were collected by crew members onboard ISS in response to a vinegar-like odor in the US Lab. On February 5, the first sample was collected approximately 1 hour after the odor was noted by the crew in the forward portion of the Lab. The second sample was collected on February 22 when a similar odor was noted and localized to the end ports of the microgravity science glovebox (MSG). The crewmember removed a glove from the MSG and collected the GSC inside the gl...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013588</guid></item><item><title>NASA Supercomputing</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013587</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013587</guid></item><item><title>ROS in Space: Thoughts on Developing and Deploying ROS for Space Robotics</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013586</link><description><![CDATA[Abstract: Presentation describes some of the issues and consideration for software that supports space robot research and development.]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013586</guid></item><item><title>Progress in Payload Separation Risk Mitigation for a Deployable Venus Heat Shield</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013585</link><description><![CDATA[Abstract: A deployable decelerator known as the Adaptive Deployable Entry and Placement Technology (ADEPT) offers substantial science and mass savings for the Venus In Situ Explorer (VISE) mission. The lander and science payload must be separated from ADEPT during atmospheric entry. This paper presents a trade study of the separation system concept of operations and provides a conceptual design of the baseline: aft-separation with a subsonic parachute. Viability of the separation system depends on the ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013585</guid></item><item><title>Investigation of Optimal Control Allocation for Gust Load Alleviation in Flight Control</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013584</link><description><![CDATA[Abstract: Advances in sensors and avionics computation power suggest real-time structural load measurements could be used in flight control systems for improved safety and performance. A conventional transport flight control system determines the moments necessary to meet the pilot's command, while rejecting disturbances and maintaining stability of the aircraft. Control allocation is the problem of converting these desired moments into control effector commands. In this paper, a framework is proposed ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013584</guid></item><item><title>Flight Hardware Packaging Design for Stringent EMC Radiated Emission Requirements</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013583</link><description><![CDATA[Abstract: This packaging design approach can help heritage hardware meet a flight project's stringent EMC radiated emissions requirement. The approach requires only minor modifications to a hardware's chassis and mainly concentrates on its connector interfaces. The solution is to raise the surface area where the connector is mounted by a few millimeters using a pedestal, and then wrapping with conductive tape from the cable backshell down to the surface-mounted connector. This design approach has been ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013583</guid></item><item><title>Advanced Materials and Fabrication Techniques for the Orion Attitude Control Motor</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013582</link><description><![CDATA[Abstract: Rhenium, with its high melting temperature, excellent elevated temperature properties, and lack of a ductile-to-brittle transition temperature (DBTT), is ideally suited for the hot gas components of the ACM (Attitude Control Motor), and other high-temperature applications. However, the high cost of rhenium makes fabricating these components using conventional fabrication techniques prohibitive. Therefore, near-net-shape forming techniques were investigated for producing cost-effective rhenium...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013582</guid></item><item><title>Sasquatch Footprint Tool</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013581</link><description><![CDATA[Abstract: The Crew Exploration Vehicle Parachute Assembly System (CPAS) is the parachute system for NASA s Orion spacecraft. The test program consists of numerous drop tests, wherein a test article rigged with parachutes is extracted or released from an aircraft. During such tests, range safety is paramount, as is the recoverability of the parachutes and test article. It is crucial to establish an aircraft release point that will ensure that the article and all items released from it will land in safe ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013581</guid></item><item><title>Galactic Cosmic Ray Event-Based Risk Model (GERM) Code</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013580</link><description><![CDATA[Abstract: This software describes the transport and energy deposition of the passage of galactic cosmic rays in astronaut tissues during space travel, or heavy ion beams in patients in cancer therapy. Space radiation risk is a probability distribution, and time-dependent biological events must be accounted for physical description of space radiation transport in tissues and cells. A stochastic model can calculate the probability density directly without unverified assumptions about shape of probability...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013580</guid></item><item><title>Method to Measure Total Noise Temperature of a Wireless Receiver During Operation</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013579</link><description><![CDATA[Abstract: A method has been developed to measure the total effective noise power in a GPS receiver, including contributions from the system temperature, the antenna temperature, interference, lossy components, etc. A known level of noise is periodically injected before the preamplifier during normal tracking, with a switch set to a very low duty cycle, so that there is insignificant signal loss for the GPS signals being tracked. Alternately, a signal of known power may be injected. The coupling port is...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013579</guid></item><item><title>Pneumatic Proboscis Heat-Flow Probe</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013578</link><description><![CDATA[Abstract: Heat flow is a fundamental property of a planet, and provides significant constraints on the abundance of radiogenic isotopes, the thermal evolution and differentiation history, and the mechanical properties of the lithosphere. Heat-flow measurements are also essential in achieving at least four of the goals set out by the National Research Council for future lunar exploration. The heat-flow probe therefore directly addresses the goal of the Lunar Geophysical Network, which is to understand t...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013578</guid></item><item><title>Video Altimeter and Obstruction Detector for an Aircraft</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013577</link><description><![CDATA[Abstract: Video-based altimetric and obstruction detection systems for aircraft have been partially developed. The hardware of a system of this type includes a downward-looking video camera, a video digitizer, a Global Positioning System receiver or other means of measuring the aircraft velocity relative to the ground, a gyroscope based or other attitude-determination subsystem, and a computer running altimetric and/or obstruction-detection software. From the digitized video data, the altimetric softwa...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013577</guid></item><item><title>Cursor Control Device Test Battery</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013576</link><description><![CDATA[Abstract: The test battery was developed to provide a standard procedure for cursor control device evaluation. The software was built in Visual Basic and consists of nine tasks and a main menu that integrates the set-up of the tasks. The tasks can be used individually, or in a series defined in the main menu. Task 1, the Unidirectional Pointing Task, tests the speed and accuracy of clicking on targets. Two rectangles with an adjustable width and adjustable center- to-center distance are presented. The ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013576</guid></item><item><title>RF Reference Switch for Spaceflight Radiometer Calibration</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013575</link><description><![CDATA[Abstract: The goal of this technology is to provide improved calibration and measurement sensitivity to the Soil Moisture Active Passive Mission (SMAP) radiometer. While RF switches have been used in the past to calibrate microwave radiometers, the switch used on SMAP employs several techniques uniquely tailored to the instrument requirements and passive remote-sensing in general to improve radiometer performance. Measurement error and sensitivity are improved by employing techniques to reduce thermal ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013575</guid></item><item><title>Test Waveform Applications for JPL STRS Operating Environment</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013574</link><description><![CDATA[Abstract: This software demonstrates use of the JPL Space Telecommunications Radio System (STRS) Operating Environment (OE), tests APIs (application programming interfaces) presented by JPL STRS OE, and allows for basic testing of the underlying hardware platform. This software uses the JPL STRS Operating Environment ["JPL Space Tele com - munications Rad io System Operating Environment,"(NPO-4776) NASA Tech Briefs, commercial edition, Vol. 37, No. 1 (January 2013), p. 47] to interact with the JPL-SDR ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013574</guid></item><item><title>Optimized Radiator Geometries for Hot Lunar Thermal Environments</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013573</link><description><![CDATA[Abstract: The optimum radiator configuration in hot lunar thermal environments is one in which the radiator is parallel to the ground and has no view to the hot lunar surface. However, typical spacecraft configurations have limited real estate available for top-mounted radiators, resulting in a desire to use the spacecraft's vertically oriented sides. Vertically oriented, flat panel radiators will have a large view factor to the lunar surface, and thus will be subjected to significant incident lunar in...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013573</guid></item><item><title>Silicon/Carbon Nanotube Photocathode for Splitting Water</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013572</link><description><![CDATA[Abstract: A proof-of-concept device is being developed for hydrogen gas production based on water-splitting redox reactions facilitated by cobalt tetra-aryl porphyrins (Co[TArP]) catalysts stacked on carbon nanotubes (CNTs) that are grown on n-doped silicon substrates. The operational principle of the proposed device is based on conversion of photoelectron energy from sunlight into chemical energy, which at a later point, can be turned into electrical and mechanical power. The proposed device will cons...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013572</guid></item><item><title>Sequential Probability Ratio Test for Spacecraft Collision Avoidance Maneuver Decisions</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013571</link><description><![CDATA[Abstract: A document discusses sequential probability ratio tests that explicitly allow decision-makers to incorporate false alarm and missed detection risks, and are potentially less sensitive to modeling errors than a procedure that relies solely on a probability of collision threshold. Recent work on constrained Kalman filtering has suggested an approach to formulating such a test for collision avoidance maneuver decisions: a filter bank with two norm-inequality-constrained epoch-state extended Kalm...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013571</guid></item><item><title>FPGA-Based X-Ray Detection and Measurement for an X-Ray Polarimeter</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013570</link><description><![CDATA[Abstract: This technology enables detection and measurement of x-rays in an x-ray polarimeter using a field-programmable gate array (FPGA). The technology was developed for the Gravitational and Extreme Magnetism Small Explorer (GEMS) mission. It performs precision energy and timing measurements, as well as rejection of non-x-ray events. It enables the GEMS polarimeter to detect precisely when an event has taken place so that additional measurements can be made. The technology also enables this functio...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013570</guid></item><item><title>New Class of Flow Batteries for Terrestrial and Aerospace Energy Storage Applications</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013569</link><description><![CDATA[Abstract: Future sustainable energy generation technologies such as photovoltaic and wind farms require advanced energy storage systems on a massive scale to make the alternate (green) energy options practical. The daunting requirements of such large-scale energy systems such as long operating and cycle life, safety, and low cost are not adequately met by state-of-the-art energy storage technologies such as vanadium flow cells, lead-acid, and zinc-bromine batteries. Much attention is being paid to redo...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013569</guid></item><item><title>Reliability of CCGA 1152 and CCGA 1272 Interconnect Packages for Extreme Thermal Environments</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013568</link><description><![CDATA[Abstract: Ceramic column grid array (CCGA) packages have been increasing in use based on their advantages of high interconnect density, very good thermal and electrical performance, and compatibility with standard surface-mount packaging assembly processes. CCGA packages are used in space applications such as in logics and microprocessor functions, telecommunications, flight avionics, and payload electronics. As these packages tend to have less solder joint strain relief than leaded packages, the relia...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013568</guid></item><item><title>ESD Test Apparatus for Soldering Irons</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013567</link><description><![CDATA[Abstract: ESDA (Electrostatic Discharge Association) ESD STM 13.1-2000 requires frequent testing of the voltage leakage from the tip of a soldering iron and the resistance from the tip of the soldering iron to the common point ground. Without this test apparatus, the process is time-consuming and requires several wires, alligator clips, or test probes, as well as additional equipment. Soldering iron tips must be tested for electrostatic discharge risks frequently, and this typically takes a lot of time...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013567</guid></item><item><title>An Offload NIC for NASA, NLR, and Grid Computing</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013566</link><description><![CDATA[Abstract: This work addresses distributed data management and access dynamically configurable high-speed access to data distributed and shared over wide-area high-speed network environments. An offload engine NIC (network interface card) is proposed that scales at nX10-Gbps increments through 100-Gbps full duplex. The Globus de facto standard was used in projects requiring secure, robust, high-speed bulk data transport. Novel extension mechanisms were derived that will combine these technologies for us...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013566</guid></item><item><title>Ceramic Adhesive and Methods for On-Orbit Repair of Re-Entry Vehicles</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013565</link><description><![CDATA[Abstract: This adhesive is capable of repairing damaged leading edge components of reentry vehicles while in space, and is novel with regard to its ability to be applied in the vacuum of space, and in a microgravity environment. Once applied, the adhesive provides thermal and oxidation protection to the substrate (in this case, reinforced carbon/carbon composites, RCCs) during re-entry of a space vehicle. Although there may be many formulations for repair adhesives, at the time of this reporting, this ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013565</guid></item><item><title>Multi-Scale CNT-Based Reinforcing Polymer Matrix Composites for Lightweight Structures</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013564</link><description><![CDATA[Abstract: Reinforcing critical areas in carbon polymer matrix composites (PMCs), also known as fiber reinforced composites (FRCs), is advantageous for structural durability. Since carbon nanotubes (CNTs) have extremely high tensile strength, they can be used as a functional additive to enhance the mechanical properties of FRCs. However, CNTs are not readily dispersible in the polymer matrix, which leads to lower than theoretically predicted improvement in mechanical, thermal, and electrical properties ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013564</guid></item><item><title>Manufacturing of Nanocomposite Carbon Fibers and Composite Cylinders</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013563</link><description><![CDATA[Abstract: Pitch-based nanocomposite carbon fibers were prepared with various percentages of carbon nanofibers (CNFs), and the fibers were used for manufacturing composite structures. Experimental results show that these nanocomposite carbon fibers exhibit improved structural and electrical conductivity properties as compared to unreinforced carbon fibers. Composite panels fabricated from these nanocomposite carbon fibers and an epoxy system also show the same properties transformed from the fibers. Sin...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013563</guid></item><item><title>Mixed Integer Programming and Heuristic Scheduling for Space Communication</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013562</link><description><![CDATA[Abstract: Optimal planning and scheduling for a communication network was created where the nodes within the network are communicating at the highest possible rates while meeting the mission requirements and operational constraints. The planning and scheduling problem was formulated in the framework of Mixed Integer Programming (MIP) to introduce a special penalty function to convert the MIP problem into a continuous optimization problem, and to solve the constrained optimization problem using heuristi...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013562</guid></item><item><title>Using a Blender to Assess the Microbial Density of Encapsulated Organisms</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013561</link><description><![CDATA[Abstract: There are specific NASA requirements for source-specific encapsulated microbial density for encapsulated organisms in non-metallic materials. Projects such as the Mars Science Laboratory (MSL) that use large volumes of non-metallic materials of planetary protection concern pose a challenge to their bioburden budget. An optimized and adapted destructive hardware technology employing a commercial blender was developed to assess the embedded bioburden of thermal paint for the MSL project. The ma...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013561</guid></item><item><title>Multi-User Space Link Extension (SLE) System</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013560</link><description><![CDATA[Abstract: The Multi-User Space (MUS) Link Extension system, a software and data system, provides Space Link Extension (SLE) users with three space data transfer services in timely, complete, and offline modes as applicable according to standards defined by the Consultative Committee for Space Data Systems (CCSDS). MUS radically reduces the schedule, cost, and risk of implementing a new SLE user system, minimizes operating costs with a lights-out approach to SLE, and is designed to require no sustaining...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013560</guid></item><item><title>Aerogel-Based Multilayer Insulation with Micrometeoroid Protection</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013559</link><description><![CDATA[Abstract: Ultra-low-density, highly hydrophobic, fiber-reinforced aerogel material integrated with MLI (aluminized Mylar reflectors and B4A Dacron separators) offers a highly effective insulation package by providing unsurpassed thermal performance and significant robustness, delivering substantial MMOD protection via the addition of a novel, durable, external aerogel layer. The hydrophobic nature of the aerogel is an important property for maintaining thermal performance if the material is exposed to ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013559</guid></item><item><title>Functional Near-Infrared Spectroscopy Signals Measure Neuronal Activity in the Cortex</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013558</link><description><![CDATA[Abstract: Functional near infrared spectroscopy (fNIRS) is an emerging optical neuroimaging technology that indirectly measures neuronal activity in the cortex via neurovascular coupling. It quantifies hemoglobin concentration ([Hb]) and thus measures the same hemodynamic response as functional magnetic resonance imaging (fMRI), but is portable, non-confining, relatively inexpensive, and is appropriate for long-duration monitoring and use at the bedside. Like fMRI, it is noninvasive and safe for repeat...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013558</guid></item><item><title>Control Software for Piezo Stepping Actuators</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013557</link><description><![CDATA[Abstract: A control system has been developed for the Space Interferometer Mission (SIM) piezo stepping actuator. Piezo stepping actuators are novel because they offer extreme dynamic range (centimeter stroke with nanometer resolution) with power, thermal, mass, and volume advantages over existing motorized actuation technology. These advantages come with the added benefit of greatly reduced complexity in the support electronics. The piezo stepping actuator consists of three fully redundant sets of pie...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013557</guid></item><item><title>Pt-Ni and Pt-Co Catalyst Synthesis Route for Fuel Cell Applications</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013556</link><description><![CDATA[Abstract: Oxygen reduction reactions (ORRs) at the cathode are the rate-limiting step in fuel cell performance. The ORR is 100 times slower than the corresponding hydrogen oxidation at the anode. Speeding up the reaction at the cathode will improve fuel cell efficiency. The cathode material is generally Pt powder painted onto a substrate (e.g., graphite paper). Recent efforts in the fuel cell area have focused on replacing Pt with Pt-X alloys (where X = Co, Ni, Zr, etc.) in order to (a) reduce cost, an...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013556</guid></item><item><title>Self-Healing Nanocomposites for Reusable Composite Cryotanks</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013555</link><description><![CDATA[Abstract: Composite cryotanks, or composite overwrapped pressure vessels (COPVs), offer advantages over currently used aluminum-lithium cryotanks, particularly with respect to weight savings. Future NASA missions are expected to use COPVs in spaceflight propellant tanks to store fuels, oxidizers, and other liquids for launch and space exploration vehicles. However, reliability, reparability, and reusability of the COPVs are still being addressed, especially in cryogenic temperature applications; this h...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013555</guid></item><item><title>A Mission Concept: Re-Entry Hopper-Aero-Space-Craft System on-Mars (REARM-Mars)</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013554</link><description><![CDATA[Abstract: Future missions to Mars that would need a sophisticated lander, hopper, or rover could benefit from the REARM Architecture. The mission concept REARM Architecture is designed to provide unprecedented capabilities for future Mars exploration missions, including human exploration and possible sample-return missions, as a reusable lander, ascend/descend vehicle, refuelable hopper, multiple-location sample-return collector, laboratory, and a cargo system for assets and humans. These could all be ...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013554</guid></item><item><title>NASA Tech Briefs, May 2013</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013553</link><description><![CDATA[Abstract: Topics include: Test Waveform Applications for JPL STRS Operating Environment; Pneumatic Proboscis Heat-Flow Probe; Method to Measure Total Noise Temperature of a Wireless Receiver During Operation; Cursor Control Device Test Battery; Functional Near-Infrared Spectroscopy Signals Measure Neuronal Activity in the Cortex; ESD Test Apparatus for Soldering Irons; FPGA-Based X-Ray Detection and Measurement for an X-Ray Polarimeter; Sequential Probability Ratio Test for Spacecraft Collision Avoidan...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013553</guid></item><item><title>Diagnostics and Prognostocs of Electro-Mechanical Actuators</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013551</link><description><![CDATA[Abstract: This presentation describes the research performed at NASA Ames Research Center on diagnostics and prognostics of electro-mechanical actuators.]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013551</guid></item><item><title>Evaluating Models of Human Performance: Safety-Critical Systems Applications</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013550</link><description><![CDATA[Abstract: This presentation is part of panel discussion on Evaluating Models of Human Performance. The purpose of this panel is to discuss the increasing use of models in the world today and specifically focus on how to describe and evaluate models of human performance. My presentation will focus on discussions of generating distributions of performance, and the evaluation of different strategies for humans performing tasks with mixed initiative (Human-Automation) systems. I will also discuss issues wi...]]></description><pubDate>Fri, 31 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013550</guid></item><item><title>Resolving Off-Nominal Situations in Schedule-Based Terminal Area Operations: Results from a Human-in-the-Loop Simulation</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013549</link><description><![CDATA[Abstract: A recent human-in-the-loop simulation in the Airspace Operations Laboratory (AOL) at NASA's Ames Research Center investigated the robustness of Controller-Managed Spacing (CMS) operations. CMS refers to AOL-developed controller tools and procedures for enabling arrivals to conduct efficient Optimized Profile Descents with sustained high throughput. The simulation provided a rich data set for examining how a traffic management supervisor and terminal-area controller participants used the CMS t...]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013549</guid></item><item><title>Evolving Systems: An Outcome of Fondest Hopes and Wildest Dreams</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013548</link><description><![CDATA[Abstract: New theory is presented for evolving systems, which are autonomously controlled subsystems that self-assemble into a new evolved system with a higher purpose. Evolving systems of aerospace structures often require additional control when assembling to maintain stability during the entire evolution process. This is the concept of Adaptive Key Component Control that operates through one specific component to maintain stability during the evolution. In addition, this control must often overcome ...]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013548</guid></item><item><title>Identification of Time-Varying Pilot Control Behavior in Multi-Axis Control Tasks</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013547</link><description><![CDATA[Abstract: Recent developments in fly-by-wire control architectures for rotorcraft have introduced new interest in the identification of time-varying pilot control behavior in multi-axis control tasks. In this paper a maximum likelihood estimation method is used to estimate the parameters of a pilot model with time-dependent sigmoid functions to characterize time-varying human control behavior. An experiment was performed by 9 general aviation pilots who had to perform a simultaneous roll and pitch cont...]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013547</guid></item><item><title>Cognitive Systems Engineering: The Next 30 Years</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013546</link><description><![CDATA[Abstract: This presentation is part of panel discussion on Cognitive Systems Engineering. The purpose of this panel is to discuss the challenges and future directions of Cognitive Systems Engineering for the next 30 years. I intended to present the work we have been doing with the Aviation Safety program and Space Human Factors Engineering project on Work Domain Analysis and some areas of Research Focus. Specifically, I intend to focus on the shift on the need to understand and model attention in mixed...]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013546</guid></item><item><title>Frame Rate and Human Vision</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013545</link><description><![CDATA[Abstract: To enhance the quality of the theatre experience, the film industry is interested in achieving higher frame rates for capture and display. In this talk I will describe the basic spatio-temporal sensitivities of human vision, and how they respond to the time sequence of static images that is fundamental to cinematic presentation.]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013545</guid></item><item><title>Disturbance Accommodating Adaptive Control with Application to Wind Turbines</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013544</link><description><![CDATA[Abstract: Adaptive control techniques are well suited to applications that have unknown modeling parameters and poorly known operating conditions. Many physical systems experience external disturbances that are persistent or continually recurring. Flexible structures and systems with compliance between components often form a class of systems that fail to meet standard requirements for adaptive control. For these classes of systems, a residual mode filter can restore the ability of the adaptive control...]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013544</guid></item><item><title>Mars Sample Return: Mars Ascent Vehicle Mission and Technology Requirements</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013542</link><description><![CDATA[Abstract: A Mars Sample Return mission is the highest priority science mission for the next decade recommended by the recent Decadal Survey of Planetary Science, the key community input process that guides NASA's science missions. A feasibility study was conducted of a potentially simple and low cost approach to Mars Sample Return mission enabled by the use of new commercial capabilities. Previous studies of MSR have shown that landing an all up sample return mission with a high mass capacity lander is...]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013542</guid></item><item><title>Biochemical Profile</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013541</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013541</guid></item><item><title>Body Measures</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013540</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013540</guid></item><item><title>Salivary Markers: The Effects of Long-Duration Spaceflight on Salivary and Blood Markers of Innate Immunity</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013539</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Thu, 30 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013539</guid></item><item><title>Spring 2013 Graduate Engineering Internship Summary</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013538</link><description><![CDATA[Abstract: In the spring of 2013, I participated in the National Aeronautics and Space Administration (NASA) Pathways Intern Employment Program at the Kennedy Space Center (KSC) in Florida. This was my final internship opportunity with NASA, a third consecutive extension from a summer 2012 internship. Since the start of my tenure here at KSC, I have gained an invaluable depth of engineering knowledge and extensive hands-on experience. These opportunities have granted me the ability to enhance my systems...]]></description><pubDate>Wed, 29 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013538</guid></item><item><title>Microbial Monitoring of the International Space Station</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013534</link><description><![CDATA[Abstract: Humans living and working in the harsh environment of space present many challenges for habitability engineers and microbiologists. Spacecraft must provide an internal environment in which physical (gas composition, pressure, temperature, and humidity), chemical, and biological environmental parameters are maintained at safe levels. Microorganisms are ubiquitous and will accompany all human-occupied spacecraft, but if biological contamination were to reach unacceptable levels, long-term human...]]></description><pubDate>Tue, 28 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013534</guid></item><item><title>Spatial Coding of Eye Movements Relative to Perceived Orientations During Roll Tilt with Different Gravitoinertial Loads</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013533</link><description><![CDATA[Abstract: This purpose of this study was to examine the spatial coding of eye movements during roll tilt relative to perceived orientations while free-floating during the microgravity phase of parabolic flight or during head tilt in normal gravity. Binocular videographic recordings obtained in darkness from six subjects allowed us to quantify the mean deviations in gaze trajectories along both horizontal and vertical coordinates relative to the aircraft and head orientations. Both variability and curva...]]></description><pubDate>Tue, 28 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013533</guid></item><item><title>Clinical Practice Guideline for Vitamin D</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013531</link><description><![CDATA[Abstract: Vitamin D and its metabolites have clinical significance because they play a critical function in calcium homeostasis and bone metabolism. Although not all of the pathologic mechanisms have been adequately described, vitamin D insufficiency and deficiency, as measured by low levels of 25-OH vitamin D, are associated with a variety of clinical conditions including osteoporosis, falls and fractures in the elderly, decreased immune function, bone pain, and possibly colon cancer and cardiovascula...]]></description><pubDate>Tue, 28 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013531</guid></item><item><title>Integrating Condition Indicators and Usage Parameters for Improved Spiral Bevel Gear Health Monitoring</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013528</link><description><![CDATA[Abstract: The objective of this study was to illustrate the importance of combining Health Usage Monitoring Systems (HUMS) data with usage monitoring system data when detecting rotorcraft transmission health. Six gear sets were tested in the NASA Glenn Spiral Bevel Gear Fatigue Rig. Damage was initiated and progressed on the gear and pinion teeth. Damage progression was measured by debris generation and documented with inspection photos at varying torque values. A contact fatigue analysis was applied t...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013528</guid></item><item><title>Gear Design Effects on the Performance of High Speed Helical Gear Trains as Used in Aerospace Drive Systems</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013527</link><description><![CDATA[Abstract: The performance of high-speed helical gear trains is of particular importance for tiltrotor aircraft drive systems. These drive systems are used to provide speed reduction/torque multiplication from the gas turbine output shaft and provide the necessary offset between these parallel shafts in the aircraft. Four different design configurations have been tested in the NASA Glenn Research Center, High Speed Helical Gear Train Test Facility. The design configurations included the current aircraft...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013527</guid></item><item><title>Large-Scale Liquid Hydrogen Tank Rapid Chill and Fill Testing for the Advanced Shuttle Upper Stage Concept</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013526</link><description><![CDATA[Abstract: Cryogenic upper stages in the Space Shuttle program were prohibited primarily due to a safety risk of a 'return to launch site' abort. An upper stage concept addressed this concern by proposing that the stage be launched empty and filled using shuttle external tank residuals after the atmospheric pressure could no longer sustain an explosion. However, only about 5 minutes was allowed for tank fill. Liquid hydrogen testing was conducted within a near-ambient environment using the multipurpose ...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013526</guid></item><item><title>Computational Fluid Dynamics Uncertainty Analysis for Payload Fairing Spacecraft Environmental Control Systems</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013525</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013525</guid></item><item><title>Computational Fluid Dynamics Uncertainty Analysis for Payload Fairing Spacecraft Environmental Control Systems</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013524</link><description><![CDATA[Abstract: Spacecraft thermal protection systems are at risk of being damaged due to airflow produced from Environmental Control Systems. There are inherent uncertainties and errors associated with using Computational Fluid Dynamics to predict the airflow field around a spacecraft from the Environmental Control System. This proposal describes an approach to validate the uncertainty in using Computational Fluid Dynamics to predict airflow speeds around an encapsulated spacecraft. The research described h...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013524</guid></item><item><title>Structural Analysis Using Computer Based Methods</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013523</link><description><![CDATA[Abstract: The stiffness of a flex hose that will be used in the umbilical arms of the Space Launch Systems mobile launcher needed to be determined in order to properly qualify ground umbilical plate behavior during vehicle separation post T-0. This data is also necessary to properly size and design the motors used to retract the umbilical arms. Therefore an experiment was created to determine the stiffness of the hose. Before the test apparatus for the experiment could be built, the structure had to be...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013523</guid></item><item><title>Economic Optimization of Innovation and Risk</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013522</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013522</guid></item><item><title>Visual Impairment/Intracranial Pressure (VIIP) Monitoring and Diagnostic Capabilities Aboard the International Space Station</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013521</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013521</guid></item><item><title>NASA Pathways Intern Employment Program</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013520</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013520</guid></item><item><title>Dynamic Sampling of Cabin VOCs during the Mission Operations Test of the Deep Space Habitat</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013519</link><description><![CDATA[Abstract: The atmospheric composition inside spacecraft is dynamic due to changes in crew metabolism and payload operations. A portable FTIR gas analyzer was used to monitor the atmospheric composition of four modules (Core lab, Veggie Plant Atrium, Hygiene module, and Xhab loft) within the Deep Space Habitat '(DSH) during the Mission Operations Test (MOT) conducted at the Johnson Space Center. The FTIR was either physically relocated to a new location or the plumbing was changed so that a different lo...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013519</guid></item><item><title>Spectroscopic chemical analysis methods and apparatus</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013518</link><description><![CDATA[Abstract: Spectroscopic chemical analysis methods and apparatus are disclosed which employ deep ultraviolet (e.g. in the 200 nm to 300 nm spectral range) electron beam pumped wide bandgap semiconductor lasers, incoherent wide bandgap semiconductor light emitting devices, and hollow cathode metal ion lasers to perform non-contact, non-invasive detection of unknown chemical analytes. These deep ultraviolet sources enable dramatic size, weight and power consumption reductions of chemical analysis instrume...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013518</guid></item><item><title>Carbon nanotube vacuum gauges with wide-dynamic range and processes thereof</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013517</link><description><![CDATA[Abstract: A miniature thermal conductivity gauge employs a carbon single-walled-nanotube. The gauge operates on the principle of thermal exchange between the voltage-biased nanotube and the surrounding gas at low levels of power and low temperatures to measure vacuum across a wide dynamic range. The gauge includes two terminals, a source of constant voltage to the terminals, a single-walled carbon nanotube between the terminals, a calibration of measured conductance of the nanotube to magnitudes of sur...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013517</guid></item><item><title>Surface modified aerogel monoliths</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013516</link><description><![CDATA[Abstract: This invention comprises reinforced aerogel monoliths such as silica aerogels having a polymer coating on its outer geometric surface boundary, and to the method of preparing said aerogel monoliths. The polymer coatings on the aerogel monoliths are derived from polymer precursors selected from the group consisting of isocyanates as a precursor, precursors of epoxies, and precursors of polyimides. The coated aerogel monoliths can be modified further by encapsulating the aerogel with the polyme...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013516</guid></item><item><title>Pulsed ultrasonic stir welding method</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013515</link><description><![CDATA[Abstract: A method of performing ultrasonic stir welding uses a welding head assembly to include a plate and a rod passing through the plate. The rod is rotatable about a longitudinal axis thereof. In the method, the rod is rotated about its longitudinal axis during a welding operation. During the welding operation, a series of on-off ultrasonic pulses are applied to the rod such that they propagate parallel to the rod's longitudinal axis. At least a pulse rate associated with the on-off ultrasonic pul...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013515</guid></item><item><title>Dynamic Sampling of Trace Contaminants During the Mission Operations Test of the Deep Space Habitat</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013514</link><description><![CDATA[Abstract: The atmospheric composition inside spacecraft during long duration space missions is dynamic due to changes in the living and working environment of crew members, crew metabolism and payload operations. A portable FTIR gas analyzer was used to monitor the atmospheric composition within the Deep Space Habitat (DSH) during the Mission Operations Test (MOT) conducted at the Johnson Space Center (JSC). The FTIR monitored up to 20 gases in near- real time. The procedures developed for operating th...]]></description><pubDate>Fri, 24 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013514</guid></item><item><title>Spring 2013 Student Showcase: NE-L3 Prototype Development Laboratory</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013512</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013512</guid></item><item><title>Wireless autonomous device data transmission</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013511</link><description><![CDATA[Abstract: A method of communicating information from a wireless autonomous device (WAD) to a base station. The WAD has a data element having a predetermined profile having a total number of sequenced possible data element combinations. The method includes receiving at the WAD an RF profile transmitted by the base station that includes a triggering portion having a number of pulses, wherein the number is at least equal to the total number of possible data element combinations. The method further include...]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013511</guid></item><item><title>Extreme low frequency acoustic measurement system</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013510</link><description><![CDATA[Abstract: The present invention is an extremely low frequency (ELF) microphone and acoustic measurement system capable of infrasound detection in a portable and easily deployable form factor. In one embodiment of the invention, an extremely low frequency electret microphone comprises a membrane, a backplate, and a backchamber. The backchamber is sealed to allow substantially no air exchange between the backchamber and outside the microphone. Compliance of the membrane may be less than ambient air compl...]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013510</guid></item><item><title>Exploration of Near-Earth Asteroids</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013509</link><description><![CDATA[Abstract: A major goal for NASA's human spaceflight program is to send astronauts to near-Earth asteroids (NEAs) in the coming decades. Missions to NEAs would undoubtedly provide a great deal of technical and engineering data on spacecraft operations for future human space exploration while conducting in-depth scientific examinations of these primitive objects. However, prior to sending human explorers to NEAs, robotic investigations of these bodies would be required in order to maximize operational ef...]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013509</guid></item><item><title>Near-Earth Object Exploration and Marco Polo-R</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013508</link><description><![CDATA[Abstract: A major goal for NASA's human spaceflight program is to send astronauts to near-Earth asteroids (NEAs) in the coming decades. Missions to NEAs would undoubtedly provide a great deal of technical and engineering data on spacecraft operations for future human space exploration while conducting in-depth scientific examinations of these primitive objects. However, prior to sending human explorers to NEAs, robotic investigations of these bodies would be required in order to maximize operational ef...]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013508</guid></item><item><title>Optimizing Training Methods for Exploration Medical Crew: An Assessment of the Current Gaps</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013507</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013507</guid></item><item><title>Systems and methods for circuit lifetime evaluation</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013506</link><description><![CDATA[Abstract: Systems and methods for estimating the lifetime of an electrical system in accordance with embodiments of the invention are disclosed. One embodiment of the invention includes iteratively performing Worst Case Analysis (WCA) on a system design with respect to different system lifetimes using a computer to determine the lifetime at which the worst case performance of the system indicates the system will pass with zero margin or fail within a predetermined margin for error given the environment...]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013506</guid></item><item><title>Characterization of the 2012-044C Briz-M Upper Stage Breakup</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013504</link><description><![CDATA[Abstract: On 6 August, 2012, Russia launched two commercial satellites aboard a Proton rocket, and attempted to place them in geosynchronous orbit using a Briz-M upper stage (2012-044C, SSN 38746). Unfortunately, the upper stage failed early in its burn and was left stranded in an elliptical orbit with a perigee in low Earth orbit (LEO). Because the stage failed with much of its fuel on board, it was deemed a significant breakup risk. These fears were confirmed when it broke up 16 October, creating a l...]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013504</guid></item><item><title>System and method for progressive band selection for hyperspectral images</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013503</link><description><![CDATA[Abstract: Disclosed herein are systems, methods, and non-transitory computer-readable storage media for progressive band selection for hyperspectral images. A system having module configured to control a processor to practice the method calculates a virtual dimensionality of a hyperspectral image having multiple bands to determine a quantity Q of how many bands are needed for a threshold level of information, ranks each band based on a statistical measure, selects Q bands from the multiple bands to gen...]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013503</guid></item><item><title>Jet fuel based high pressure solid oxide fuel cell system</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013502</link><description><![CDATA[Abstract: A power system for an aircraft includes a solid oxide fuel cell system which generates electric power for the aircraft and an exhaust stream; and a heat exchanger for transferring heat from the exhaust stream of the solid oxide fuel cell to a heat requiring system or component of the aircraft. The heat can be transferred to fuel for the primary engine of the aircraft. Further, the same fuel can be used to power both the primary engine and the SOFC. A heat exchanger is positioned to cool refor...]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013502</guid></item><item><title>So Close Yet So Far: The Jammed Airlock Hatch of STS-80: NASA Case Study Epilogue</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013501</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013501</guid></item><item><title>So Close Yet So Far: The Jammed Airlock Hatch of STS-80: NASA Case Study</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013500</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013500</guid></item><item><title>So Close Yet So Far: The Jammed Airlock Hatch of STS-80: Teaching Notes for NASA Case Study</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013499</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Thu, 23 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013499</guid></item><item><title>Actuator and electronics packaging for extrinsic humanoid hand</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013497</link><description><![CDATA[Abstract: The lower arm assembly for a humanoid robot includes an arm support having a first side and a second side, a plurality of wrist actuators mounted to the first side of the arm support, a plurality of finger actuators mounted to the second side of the arm support and a plurality of electronics also located on the first side of the arm support.]]></description><pubDate>Wed, 22 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013497</guid></item><item><title>Pulsed ultrasonic stir welding system</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013496</link><description><![CDATA[Abstract: An ultrasonic stir welding system includes a welding head assembly having a plate and a rod passing through the plate. The rod is rotatable about a longitudinal axis thereof. During a welding operation, ultrasonic pulses are applied to the rod as it rotates about its longitudinal axis. The ultrasonic pulses are applied in such a way that they propagate parallel to the longitudinal axis of the rod.]]></description><pubDate>Wed, 22 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013496</guid></item><item><title>Dry wind tunnel system</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013495</link><description><![CDATA[Abstract: This invention is a ground flutter testing system without a wind tunnel, called Dry Wind Tunnel (DWT) System. The DWT system consists of a Ground Vibration Test (GVT) hardware system, a multiple input multiple output (MIMO) force controller software, and a real-time unsteady aerodynamic force generation software, that is developed from an aerodynamic reduced order model (ROM). The ground flutter test using the DWT System operates on a real structural model, therefore no scaled-down structural...]]></description><pubDate>Wed, 22 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013495</guid></item><item><title>Method and system for source authentication in group communications</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013494</link><description><![CDATA[Abstract: A method and system for authentication is provided. A central node for issuing certificates to a plurality of nodes associated with the central node in a network is also provided. The central node receives a first key from at least one node from among the plurality of nodes and generates a second key based on the received first key and generates a certificate for the at least one node. The generated certificate is transmitted to the at least one node.]]></description><pubDate>Wed, 22 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013494</guid></item><item><title>Superconducting transition edge sensors and methods for design and manufacture thereof</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013493</link><description><![CDATA[Abstract: Methods for forming sensors using transition edge sensors (TES) and sensors therefrom are described. The method includes forming a plurality of sensor arrays includes at least one TES device. The TES device includes a TES device body, a first superconducting lead contacting a first portion of the TES device body, and a second superconducting lead contacting of a second portion of the TES device body, where the first and second superconducting leads separated on the TES device body by a lead s...]]></description><pubDate>Wed, 22 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013493</guid></item><item><title>In situ health monitoring of piezoelectric sensors</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013492</link><description><![CDATA[Abstract: An in situ health monitoring apparatus may include an exciter circuit that applies a pulse to a piezoelectric transducer and a data processing system that determines the piezoelectric transducer's dynamic response to the first pulse. The dynamic response can be used to evaluate the operating range, health, and as-mounted resonance frequency of the transducer, as well as the strength of a coupling between the transducer and a structure and the health of the structure.]]></description><pubDate>Wed, 22 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013492</guid></item><item><title>Trash to Gas: Converting Space Waste into Useful Supply Products</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013490</link><description><![CDATA[Abstract: The cost of sending mass into space with current propulsion technology is very expensive, making every item a crucial element of the space mission. It is essential that all materials be used to their fullest potential. Items like food, packaging, clothing, paper towels, gloves, etc., normally become trash and take up space after use. These waste materials are currently either burned up upon reentry in earth's atmosphere or sent on cargo return vehicles back to earth: a very wasteful method. T...]]></description><pubDate>Wed, 22 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013490</guid></item><item><title>ELaNa - Educational Launch of Nanosatellite Status Review</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013487</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Wed, 22 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013487</guid></item><item><title>Implementing a Microcontroller Watchdog with a Field-Programmable Gate Array (FPGA)</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013486</link><description><![CDATA[Abstract: Reliability is crucial to safety. Redundancy of important system components greatly enhances reliability and hence safety. Field-Programmable Gate Arrays (FPGAs) are useful for monitoring systems and handling the logic necessary to keep them running with minimal interruption when individual components fail. A complete microcontroller watchdog with logic for failure handling can be implemented in a hardware description language (HDL.). HDL-based designs are vendor-independent and can be used o...]]></description><pubDate>Wed, 22 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013486</guid></item><item><title>STS-114: Engine Cut-Off Sensors Are a No-Go: NASA Case Study</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013485</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013485</guid></item><item><title>STS-114: Engine Cut-Off Sensors Are a No-Go: NASA Case Study Epilogue</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013484</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013484</guid></item><item><title>CryoCube-l Model Overview</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013483</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013483</guid></item><item><title>Regolith Derived Heat Shield for Planetary Body Entry and Descent System with In Situ Fabrication</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013482</link><description><![CDATA[Abstract: This NIAC project investigated an innovative approach to provide heat shield protection to spacecraft after launch and prior to each EDL thus potentially realizing significant launch mass savings. Heat shields fabricated in situ can provide a thermal-protection system for spacecraft that routinely enter a planetary atmosphere. By fabricating the heat shield with space resources from materials available on moons and asteroids, it is possible to avoid launching the heat-shield mass from Earth. ...]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013482</guid></item><item><title>Ultrasonic Nondestructive Evaluation of PRSEUS Pressure Cube Article in Support of Load Test to Failure</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013480</link><description><![CDATA[Abstract: The PRSEUS Pressure Cube Test was a joint development effort between the Boeing Company and NASA Langley Research Center, sponsored in part by the Environmentally Responsible Aviation Project and Boeing internal R&D. This Technical Memorandum presents the results of ultrasonic inspections in support of the PRSEUS Pressure Cube Test, and is a companion document with the NASA test report and a report on the acoustic emission measurements made during the test.]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013480</guid></item><item><title>PRSEUS Pressure Cube Test Data and Response</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013479</link><description><![CDATA[Abstract: NASA s Environmentally Responsible Aviation (ERA) Program is examining the hybrid wing body (HWB) aircraft, among others, in an effort to increase the fuel efficiency of commercial aircraft. The HWB design combines features of a flying wing with features of conventional transport aircraft, and has the advantage of simultaneously increasing both fuel efficiency and payload. Recent years have seen an increased focus on the structural performance of the HWB. The key structural challenge of a HWB...]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013479</guid></item><item><title>International Space Station (ISS) Script Development Process Modeling and Improvement</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013478</link><description><![CDATA[Abstract: Software process modeling can assist in many aspects of a development project. On one hand, it helps with basic understanding of the process through visual means, and it can also assist in better understanding of schedule requirements and other process factors throughout a project's lifecycle. This project modeled an existing small software development process in an effort to better understand the process behavior and to create a test bed for process experimentation. By performing experiments...]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013478</guid></item><item><title>NASA Software Engineering Benchmarking Study</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013477</link><description><![CDATA[Abstract: To identify best practices for the improvement of software engineering on projects, NASA's Offices of Chief Engineer (OCE) and Safety and Mission Assurance (OSMA) formed a team led by Heather Rarick and Sally Godfrey to conduct this benchmarking study. The primary goals of the study are to identify best practices that: Improve the management and technical development of software intensive systems; Have a track record of successful deployment by aerospace industries, universities [including re...]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013477</guid></item><item><title>Methods and apparatus for microwave tissue welding for wound closure</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013476</link><description><![CDATA[Abstract: Methods and apparatus for joining biological tissue together are provided. In at least one specific embodiment, a method for joining biological tissue together can include applying a biological solder on a wound. A barrier layer can be disposed on the biological solder. An antenna can be located in proximate spatial relationship to the barrier layer. An impedance of the antenna can be matched to an impedance of the wound. Microwaves from a signal generator can be transmitted through the anten...]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013476</guid></item><item><title>Light emitting, photovoltaic or other electronic apparatus and system</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013475</link><description><![CDATA[Abstract: The present invention provides an electronic apparatus, such as a lighting device comprised of light emitting diodes (LEDs) or a power generating apparatus comprising photovoltaic diodes, which may be created through a printing process, using a semiconductor or other substrate particle ink or suspension and using a lens particle ink or suspension. An exemplary apparatus comprises a base; at least one first conductor; a plurality of substantially spherical or optically resonant diodes coupled ...]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013475</guid></item><item><title>An Evidence Base for Human Spaceflight Risks in Wikipedia</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013474</link><description><![CDATA[Abstract: No abstract available]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013474</guid></item><item><title>Helicopter Flight Test of 3-D Imaging Flash LIDAR Technology for Safe, Autonomous, and Precise Planetary Landing</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013472</link><description><![CDATA[Abstract: Two flash lidars, integrated from a number of cutting-edge components from industry and NASA, are lab characterized and flight tested for determination of maximum operational range under the Autonomous Landing and Hazard Avoidance Technology (ALHAT) project (in its fourth development and field test cycle) which is seeking to develop a guidance, navigation, and control (GN&C) and sensing system based on lidar technology capable of enabling safe, precise crewed or robotic landings in challengin...]]></description><pubDate>Tue, 21 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013472</guid></item><item><title>Methods of detecting and controlling mucoid Pseudomonas biofilm production</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013471</link><description><![CDATA[Abstract: Compositions and methods for detecting and controlling the conversion to mucoidy in Pseudomonas aeruginosa are disclosed. The present invention provides for detecting the switch from nonmucoid to mucoid state of P. aeruginosa by measuring mucE expression or MucE protein levels. The interaction between MucE and AlgW controls the switch to mucoidy in wild type P. aeruginosa. Also disclosed is an alginate biosynthesis heterologous expression system for use in screening candidate substances that ...]]></description><pubDate>Mon, 20 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013471</guid></item><item><title>Precise Truss Assembly using Commodity Parts and Low Precision Welding</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013470</link><description><![CDATA[Abstract: We describe an Intelligent Precision Jigging Robot (IPJR), which allows high precision assembly of commodity parts with low-precision bonding. We present preliminary experiments in 2D that are motivated by the problem of assembling a space telescope optical bench on orbit using inexpensive, stock hardware and low-precision welding. An IPJR is a robot that acts as the precise "jigging", holding parts of a local assembly site in place while an external low precision assembly agent cuts and weld...]]></description><pubDate>Mon, 20 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013470</guid></item><item><title>Motorized Beam Alignment of a Commercial X-ray Diffractometer</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013469</link><description><![CDATA[Abstract: X-ray diffraction (XRD) is a powerful analysis method that allows researchers to noninvasively probe the crystalline structure of a material. This includes the ability to determine the crystalline phases present, quantify surface residual stresses, and measure the distribution of crystallographic orientations. The Structures and Materials Division at the NASA Glenn Research Center (GRC) heavily uses the on-site XRD lab to characterize advanced metal alloys, ceramics, and polymers. One of the ...]]></description><pubDate>Mon, 20 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013469</guid></item><item><title>Buckling Testing and Analysis of Honeycomb Sandwich Panel Arc Segments of a Full-Scale Fairing Barrel Part 1: 8-Ply In-Autoclave Facesheets (Part 1. 8-Ply In-Autoclave Facesheets.)</title><link>http://ntrs.nasa.gov/search.jsp?R=20130013468</link><description><![CDATA[Abstract: Four honeycomb sandwich panels, representing 1/16th arc segments of a 10-m diameter barrel section of the heavy lift launch vehicle, were manufactured under the NASA Composites for Exploration program and the NASA Space Launch Systems program. Two configurations were chosen for the panels: 6-ply facesheets with 1.125 in. honeycomb core and 8-ply facesheets with 1.000 in. honeycomb core. Additionally, two separate carbon fiber/epoxy material systems were chosen for the facesheets: inautoclave ...]]></description><pubDate>Mon, 20 May 2013 00:00:00 GMT</pubDate><guid>http://ntrs.nasa.gov/search.jsp?R=20130013468</guid></item></channel></rss>
