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Additionally, on-orbit ventilation system performance and initial crew feedback is presented. This approach is applicable to any private enclosed space that the crew will occupy. Author Acoustics; International Space Station; Spacecraft Cabins; Ventilation; Air Ducts 20100017324 NASA Glenn Research Center, Cleveland, OH, USA Improved Phased Array Imaging of a Model Jet Dougherty, Robert P.; Podboy, Gary G.; March 2010; 35 pp.; In English; 15th Aeroacoustics Conference (30th Aeroacoustics Conference, 11-13 May 2009, Miami, FL, USA; Original contains color illustrations Contract(s)/Grant(s): NNC07CB02C; WBS 561581.02.08.03.18.02 Report No.(s): NASA/TM-2010-216227; AIAA Paper 2009-3186; E-17214; Copyright; Avail.: CASI: A03, Hardcopy ONLINE: http://hdl.handle.net/2060/20100017324 An advanced phased array system, OptiNav Array 48, and a new deconvolution algorithm, TIDY, have been used to make octave band images of supersonic and subsonic jet noise produced by the NASA Glenn Small Hot Jet Acoustic Rig (SHJAR). The results are much more detailed than previous jet noise images. Shock cell structures and the production of screech in an underexpanded supersonic jet are observed directly. Some trends are similar to observations using spherical and elliptic mirrors that partially informed the two-source model of jet noise, but the radial distribution of high frequency noise near the nozzle appears to differ from expectations of this model. The beamforming approach has been validated by agreement between the integrated image results and the conventional microphone data. Author Gas Jets; Imaging Techniques; Jet Aircraft Noise; Phased Arrays; Supersonic Jet Flow 20100017457 Research Associates for Defense Conversion, Inc., Marcy, NY USA; Texas Univ., Dallas, TX, USA Test Token Driven Acoustic Balancing for Sparse Enrollment Data in Cohort GMM Speaker Recognition Suh, Jun-Won; Hansen, John H; Apr 8, 2009; 5 pp.; In English; 35th International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 14 - 19 Mar. 2010, Dallas, TX, USA; Original contains color illustrations Contract(s)/Grant(s): FA8750-09-C-0067; FA8750-05-C-0029; Proj-3188; 35885G Report No.(s): AD-A517221; AFRL-RI-RS-TP-2010-8; No Copyright; Avail.: Defense Technical Information Center (DTIC) ONLINE: http://hdl.handle.net/100.2/ADA517221 For this study, we address the problem to in-set/out-of-set speaker recognition with sparse enrollment data. Sparse enrollment data presents a unique challenge due to a lack of acoustic space coverage. The proposed algorithm focuses on filling acoustic holes and fortifying the phone expectation in the test stage. This scheme is possible by using the GMM model to classify the speaker phone information at the feature level. The parallel training for most occurred (top) and less occurred (bottom) rank ordered mixture classification (speaker phone class) information is called Sweet-16, and the employing a test data mixture histogram using the Sweet-16 is called Sweet-16 On-The-Fly (OTF). The Sweet-16 OTF method is evaluated using telephone conversation speech from the FISHER corpus. The Sweet-16 OTF improves on average 2.17% absolute EER over the previous Sweet-16, and average 4.03% absolute EER over GMM-UBM baseline using 2sec test data. The proposed algorithm improvement is a noteworthy stage to compensate for both sparse enrollment data and limited test data. DTIC Acoustics; Balancing; Speech 72 ATOMIC AND MOLECULAR PHYSICS Includes atomic and molecular structure, electron properties, and atomic and molecular spectra. For elementary particle physics see 73 Nuclear Physics. 20100016379 Air Force Inst. of Tech., Wright-Patterson AFB, OH USA Positron Annihilation Ratio Spectroscopy (PsARS) Applied to Positronium Formation Studies Slaughter, Robert C.; March 2010; 152 pp.; In English; Original contains color illustrations Report No.(s): AD-A516510; AFIT/GNE/ENP/10-M07; No Copyright; Avail.: Defense Technical Information Center (DTIC) A Positron Annihilation of Radiation Spectrometer (PsARS) was developed and characterized. PsARS spectroscopy as 168
well as digital Positron Annihilation Lifetime Spectroscopy (PALS) was applied to measure positronium formation on gold manoparticles deposited through an evaporative method onto a thin capillary tube. This gold coated capillary tube was designed to be used for positronium lifetime studies in local electric field experiments. High local electric fields can polarize a positron-electron pair, which may result in an extended lifetime of the positron. These fields may be created through the interaction of an external electric field with silver manoparticles deposited onto the surface of gold coated capillary tubes. The capability to control size and distribution of silver manoparticles on such a surface is demonstrated. PsARS analysis of potassium dodecahydrododecaborate (dodecaborate) solutions was also performed to verify positronic dodecaborate species as well as potential positronium quenching. DTIC Annihilation Reactions; Positron Annihilation; Positronium; Positrons; Radiation Dosage; Spectroscopy 73 NUCLEAR PHYSICS Includes nuclear particles; and reactor theory. For space radiation see 93 Space Radiation. For atomic and molecular physics see 72 Atomic and Molecular Physics. For elementary particle physics see 77 Physics of Elementary Particles and Fields. For nuclear astrophysics see 90 Astrophysics. 20100017085 Sandia National Labs., Albuquerque, NM USA Photoneutron Effects on Pulse Reactor Kinetics for the Annular Core Research Reactor (ACRR) Parma, Edward J.; June 2009; 25 pp.; In English Contract(s)/Grant(s): DE-AC04-94AL85000 Report No.(s): DE2010-970262; SAND2009-2817; No Copyright; Avail.: National Technical Information Service (NTIS) The Annular Core Research Reactor (ACRR) is a swimming-pool type pulsed reactor that maintains an epithermal neutron flux and a nine-inch diameter central dry cavity. One of its uses is neutron and gamma-ray irradiation damage studies on electronic components under transient reactor power conditions. In analyzing the experimental results, careful attention must be paid to the kinetics associated with the reactor to ensure that the transient behavior of the electronic device is understood. Since the ACRR fuel maintains a substantial amount of beryllium, copious quantities of photoneutrons are produced that can significantly alter the expected behavior of the reactor power, especially following a reactor pulse. In order to understand these photoneutron effects on the reactor kinetics, the KIFLE transient reactor-analysis code was modified to include the photoneutron groups associated with the beryllium. The time-dependent behavior of the reactor power was analyzed for small and large pulses, assuming several initial conditions including following several pulses during the day, and following a long steady-state power run. NTIS Kinetics; Photoneutrons 20100017113 Idaho National Lab., Idaho Falls, ID, USA Results of a Neutronic Simulation of HTR-Proteus Core 4.2 Using PEBBED and Other INL Reactor Physics Tools: FY09 Report Gougar, Hans D.; September 2009; 51 pp.; In English Contract(s)/Grant(s): DE-AC07-05ID14517 Report No.(s): DE2009-968654; INL/EXT-09-16620; No Copyright; Avail.: National Technical Information Service (NTIS) The Idaho National Laboratorys deterministic neutronics analysis codes and methods were applied to the computation of the core multiplication factor of the HTR-Proteus pebble bed reactor critical facility. A combination of unit cell calculations (COMBINE-PEBDAN), 1-D discrete ordinates transport (SCAMP), and nodal diffusion calculations (PEBBED) were employed to yield keff and flux profiles. Preliminary results indicate that these tools, as currently configured and used, do not yield satisfactory estimates of keff. If control rods are not modeled, these methods can deliver much better agreement with experimental core eigenvalues which suggests that development efforts should focus on modeling control rod and other absorber regions. Under some assumptions and in 1D subcore analyses, diffusion theory agrees well with transport. This suggests that developments in specific areas can produce a viable core simulation approach. Some corrections have been identified and can be further developed, specifically: treatment of the upper void region, treatment of inter-pebble streaming, and explicit (multiscale) transport modeling of TRISO fuel particles as a first step in cross section generation. Until corrections 169
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Since its founding, NASA has been d
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NASA STI Availability Information N
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46 Geophysics .....................
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02 AERODYNAMICS Includes aerodynami
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limited and/or other common visuali
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is a computer-based thickness desig
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20100017735 Government Accountabili
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protective coating systems for USAF
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shock waves forming on the winglet
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emission model, design of modeling
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conducted on a damaged F-18 aircraf
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Devices - Portable medical diagnost
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for use on the Ares V launch vehicl
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20100017731 Jet Propulsion Lab., Ca
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FPMU is primarily due to and driven
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of thermographic, shearographic, an
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20100017649 NASA Marshall Space Fli
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20100017306 NASA, Washington, DC US
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observed epoxy resin and isopropyl
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velocities (i.e. 7 km/s) for normal
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20100017503 Army Research Lab., Ade
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approval for these types of treatme
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26 METALS AND METALLIC MATERIALS In
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20100017852 Lawrence Livermore Nati
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20100017326 NASA Glenn Research Cen
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28 PROPELLANTS AND FUELS Includes r
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sacrifice in performance or emissio
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combatants. To counter this threat,
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32 COMMUNICATIONS AND RADAR Include
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floods. RFID is a wireless automate
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20100017455 Oasis Systems, Inc., Le
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dynamic spectrum allocation, schedu
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33 ELECTRONICS AND ELECTRICAL ENGIN
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Disconnection of a cell from the pa
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was used to develop a multivariate
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20100017552 Toledo Univ., OH USA Co
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elated to the performance of a comp
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20100017548 PHDS, Raymond, WA USA P
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20100017025 National Inst. of Stand
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y etching part of the thermal SiO2
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measurement of the item, selecting
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20100017566 Wright State Univ., Day
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43 EARTH RESOURCES AND REMOTE SENSI
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moisture flux. NASA satellite is us
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source. As a result of that testing
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integrated sampling method that col
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(v5.6394) as the EPA-approved versi
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set at $7 (in nominal dollars) per
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catastrophic failure of Coal Combus
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a historical record. Serve as a tec
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with the scrappage function and gro
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20100017042 Air Force Inst. of Tech
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consist of (1) a printed photogeolo
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20100017207 NASA, Washington, DC, U
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exploration, for example, geologic
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20100017218 NASA, Washington, DC, U
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20100017246 Naval Research Lab., Mo
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and post-shot core analysis to quan
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20100017248 Naval Research Lab., Mo
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Page 134 and 135: a prolonged QTc interval. The poten
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Page 146 and 147: with these agents. It is not yet cl
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Page 166 and 167: 70 PHYSICS (GENERAL) Includes gener
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Page 184 and 185: slowness surfaces) in the damaged m
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DOCUMENT MARKUP LANGUAGES Journal o
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ELECTRON TRANSFER Single Molecule S
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Thermal Modeling and Feedback Requi
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GEOCHRONOLOGY Mapping Tyrrhena Pate
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Summary of the Updated Regulatory I
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IN SITU MEASUREMENT Miniaturized En
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LARGE SCALE INTEGRATION Large-Scale
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MAGNETOPLASMADYNAMIC THRUST- ERS Ev
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METHANE Regulation of Methane Genes
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NITROGEN Development of Designer Di
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PEBBLE BED REACTORS Nuclear Safegua
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Polymerization method for formation
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QUANTUM WELL LASERS High-Efficiency
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RESIDUES A Parameterization of Posi
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Nondestructive Evaluation Methods f
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SPACECRAFT MOTION Instrument Pointi
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Nuclear Hydrogen Initiative, Result
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THERMAL PROTECTION Design and Analy
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VIRULENCE Infectious Disease Risk A
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Aalseth, Craig E P-Type Point Conta
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Bird, L. Carbon Taxes: A Review of
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Chen, Lilia Health Hazard Evaluatio
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Peak Performance Through Nutrition
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Fox, K. M. Atmospheric Ention of Mo
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Hammond, Monica Robotic Lunar Lande
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Initial Study Comparing the Radiati
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Ko, Jinseok Design of a New Optical
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Little, Leslie E. Engineering Evalu
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Melton, Shannon On-Orbit Prospectiv
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Papanicolaou, T. Autonomous Measure
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Rickman, Doug Thermal Properties of
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Seifried, Jeffrey E. Thermal Modeli
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Stoeser, D. NASA Lunar Regolith Sim
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Wang, Shuying Post-Cyclic Behavior
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