45
45
Apr 9, 2021
04/21
by
Franz Exner, Eduard Haschek, Jeff Behary
texts
eye 45
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Die Spektren Der Elemente Bei Normalem Druck - Funken The spectrum of the elements at normal pressure - Spark Spectra by Professor Franz Exner and Dr. Eduard Haschek
Topics: spectroscopy, ultraviolet, uv, elements, spark, emission spectra
594
594
Jul 6, 2010
07/10
by
FONTAN, M.; CARIDROIT, M.; PARQUET, P.; COCHEZ, F
texts
eye 594
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THE TERM APPARENT OSMOLALITY REFERS TO THE MEASURED VALUE EXPRESSED IN MILLIOSMOLS/KG OF WATER DETERMINED BY MEANS OF OSMOMETERS-CRYOSCOPES WHOSE OPERATING PRINCIPLE IS BASED ON THE DECREASE IN THE FREEZING POINT AS A FUNCTION OF THE CONCENTRATION OF MICRO- OR MACRO-MOLECULAR PARTICLES IN THE MEDIUM. THE APPARENT OSMOLALITY OF PLASMA INCREASES PARALLEL TO THE LEVEL OF ALCOHOLEMIA; IT IS NOT ACCOMPANIED BY A PARALLEL DECREASE IN THE MEASURED RESISTIVITY OF THE PLASMA. THE HYPEROSMOLALITY CAUSED...
Topics: CHEMILUMINESCENCE, PHYSICAL PROPERTIES, RHODAMINE, EMISSION SPECTRA, PHOTOELECTRICITY
217
217
Jul 11, 2010
07/10
by
NON
texts
eye 217
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No Abstract Available
Topics: ELECTROCHEMISTRY, SILICON, SOLAR CELLS, EMISSION SPECTRA, VAPOR PRESSURE
134
134
Jul 21, 2010
07/10
by
Bregman, J.; Witteborn, F. C.; Tielens, Alexander G. G. M.; Allamandola, Louis J
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eye 134
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Interstellar molecular grain mantles are an important component of the interstellar dust inside dense molecular clouds as evidenced by the detection of absorption bands at 2.97, 3.08, 4.61, 6.0 and 6.8 microns. Mantles may also be the precursors of more complex grain mantles in the diffuse interstellar medium. The molecular composition of these icy grain mantles were calculated employing gas phase as well as grain surface reactions. The calculated mixtures consist mainly of the molecules H2O,...
Topics: EMISSION SPECTRA, GRAPHITE, NEBULAE, PHOSPHORESCENCE, ABUNDANCE, LIGHT SCATTERING, LUMINOSITY
577
577
Jul 5, 2010
07/10
by
Carter, W. V.; Mcginnis, R. F
texts
eye 577
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The results of the booster verification wind tunnel test are presented. These tests were conducted in a 14 x 14-inch trisonic wind tunnel utilizing a .0035 scale model. The nominal Mach numbers tested were 0.6, 0.9, 0.95, 1.0, 1.05, 1.20, 1.50, 2.0, 2.74, 3.00, 4.50 and 5.0. The angle of attack range was 5 to 40 deg. The yaw data was obtained over a range of -10 to 10 deg at fixed angles of attack of 0, 6, 15, 25, and 30 deg. The Reynolds number range was 4.2 to 6.9 million per foot. Results...
Topics: LASERS, SPECTROSCOPIC ANALYSIS, SYSTEMS ENGINEERING, EMISSION SPECTRA, METALLURGY, RAMAN...
296
296
Jul 6, 2010
07/10
by
Alexander, A. D., II
texts
eye 296
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Future aircraft fuels are evaluated in terms of fuel resource availability and pricing, processing methods, and economic projections over the period 1970-2000. Liquefied hydrogen, methane and propane are examined as potential turbine engine aircraft fuels relative to current JP fuel.
Topics: LASERS, POWDER (PARTICLES), SPECTROSCOPY, ELECTRIC SPARKS, EMISSION SPECTRA, PULSED RADIATION
728
728
Jun 21, 2010
06/10
by
NON
texts
eye 728
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Mariner Mars 1971 mission support, engineering, and design of Deep Space Network
Topics: HOTSHOT WIND TUNNELS, POLLUTION, PROTECTIVE COATINGS, EMISSION SPECTRA, POLYMERS, REENTRY PHYSICS
364
364
Jun 1, 2010
06/10
by
Tachibana, Y
texts
eye 364
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Modifications and applications of direct reading emission spectrometer in metallurgy and industry
Topics: EMISSION SPECTRA, INDUSTRIES, METALLURGY, READING, SPECTROMETERS, EMISSION SPECTRUM, INDUSTRY,...
432
432
Jun 21, 2010
06/10
by
Best, R. E.; Kircher, J. F.; Rollins, J. E
texts
eye 432
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Radiation effects on liquid propellant storability and computer program for shield optimization
Topics: ELECTROMAGNETIC ABSORPTION, NONEQUILIBRIUM PLASMAS, PHOTONS, DOPPLER EFFECT, EMISSION SPECTRA,...
217
217
Jun 1, 2011
06/11
by
Carr, Francis; Evans, Antony; Feron, Eric; Clarke, John-Pau
texts
eye 217
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A simple, portable and useful collection of software tools has been developed for the analysis of airport surface traffic. The tools are based on a flexible and robust traffic-flow model, and include calibration, validation and simulation functionality for this model. Several different interfaces have been developed to help promote usage of these tools, including a portable Matlab(TM) implementation of the basic algorithms; a web-based interface which provides online access to automated...
Topics: QUASARS, DEPOSITION, BLACK HOLES (ASTRONOMY), BIBLIOGRAPHIES, ELECTROMAGNETIC ABSORPTION, EMISSION...
404
404
Jun 27, 2010
06/10
by
Blankenhorn, D. H.; Chin, H. P.; Harrison, E. C.; Lawson, D. D.; Moacanin, J
texts
eye 404
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Lipid uptake prediction by prosthetic heart valve poppets from solubility parameters derived from thermodynamic considerations
Topics: GAS FLOW, LUNAR CRATERS, MOLECULAR GASES, SPECTRUM ANALYSIS, EMISSION SPECTRA, HYDROGEN, PHOTOMETRY
130
130
May 31, 2011
05/11
by
Purves, Lloyd R
texts
eye 130
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One aspect of designing future space missions is to determine whether Space Assembly and Servicing (SAS) is useful and, if so, what combination of robots and astronauts provides the most effective means of accomplishing it. Certain aspects of these choices, such as the societal value of developing the means for humans to live in space, do not lend themselves to quantification. However, other SAS costs and benefits can be quantified in a manner that can help select the most cost-effective SAS...
Topics: ABSORPTION SPECTRA, VIBRATIONAL STATES, CARBON DIOXIDE, MATHEMATICAL MODELS, EMISSION SPECTRA,...
301
301
May 31, 2011
05/11
by
Burley, Casey L.; Tung, Chee, et al; Brooks, Thomas F.; vanderWall, Berend; Richard, Hughes; Raffel, Markus; Beaumier, Philippe; Delrieux, Yves; Lim, Joon W.; Yu, Yung H.
texts
eye 301
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An initial evaluation is made of extensive three-component (3C) particle image velocimetry (PIV) measurements within the wake across a rotor disk plane. The model is a 40 percent scale BO-105 helicopter main rotor in forward flight simulation. This study is part of the HART II test program conducted in the German-Dutch Wind Tunnel (DNW). Included are wake vortex field measurements over the advancing and retreating sides of the rotor operating at a typical descent landing condition important for...
Topics: EMISSION SPECTRA, X RAYS, LINE SPECTRA, SUPERNOVAE, ESTIMATES, IONIZATION, OBSERVATORIES, POSITION...
745
745
Jul 10, 2010
07/10
by
Phillips, W. P.; Decker, J. P.; Rau, T. R.; Glatt, C. R
texts
eye 745
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An analytical and experimental investigation has been made to provide a space shuttle orbiter wing design that met the guideline requirements of landing performance, stability, and hypersonic trim for a specified center-of-gravity envelope. The analytical study was facilitated by the use of the Optimal Design Integration system (ODIN) and the experimental part of the investigation was conducted in the Langley low-turbulence pressure tunnel and the Langley continuous-flow hypersonic tunnel.
Topics: GAS DISCHARGES, LINE SPECTRA, PLASMA HEATING, PLASMA TURBULENCE, EMISSION SPECTRA, HELIUM, HIGH...
350
350
Jun 2, 2011
06/11
by
Salute, Joan S.; Kolodziej, Paul; Bull, Jeffrey D
texts
eye 350
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Recent research shows that ultra-high temperature ceramics (UHTCs) may enable sharp leading edges to be used on space vehicles. Sharp leading edges (51 centimeter) could enable an entire new design space for hypervelocity vehicles with decreased drag, increased cross-range capability, and reduced cost-to-orbit. These factors, combined with results from ground-based testing and analysis, led to the implementation of the first UHTC flight demonstration. The objective of this flight was to...
Topics: NOISE INTENSITY, NOISE REDUCTION, HIGH FREQUENCIES, ESTIMATING, EMISSION SPECTRA, EXHAUST NOZZLES,...
231
231
May 26, 2011
05/11
by
Rettig, Terrence W.; Hahn, Joseph M
texts
eye 231
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The important elements of the debate over the activity versus dormancy of comet Shoemaker Levy 9 (S-L 9) are reviewed. It is argued that the circularity of the isophotes in the inner comae of S-L 9 as well as the spatial dependencies of the comae brightness profiles are indicators of sustained dust production by S-L 9. It is also shown that the westward tail orientations, which were formerly interpreted as a sign of the comet's dormancy, are not a good indicator of either activity or dormancy....
Topics: GALAXIES, H II REGIONS, EMISSION SPECTRA, HYDROGEN, STELLAR MASS, NEUTRAL GASES, IONIZED GASES
208
208
Jun 21, 2010
06/10
by
Cohn, E. M
texts
eye 208
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Performance characteristics of hydrogen oxygen fuel cells for spacecraft, and electrochemical techniques for developing system concepts
Topics: ATMOSPHERIC MOISTURE, METEOROLOGY, MICROWAVE RADIOMETERS, WATER VAPOR, ATMOSPHERIC MODELS, CLOUDS...
In general, power devices and systems operating in vacuum or space environment are more susceptible to partial discharges, corona, or volume discharge due to the partial vacuum conditions. Partial discharge and breakdown measurements have been performed on electrical equipment operating in such environments for over decades. In spite of all the studies, fundamental understanding of partial discharge or corona initiation has not been understood completely. Various means of detection have been...
Topics: DTIC Archive, AUBURN UNIV AL, *BREAKDOWN(ELECTRONIC THRESHOLD), EMISSION SPECTRA, HELIUM, SPACE...
102
102
May 24, 2011
05/11
by
Mathur, S
texts
eye 102
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Topics considered include: Strong X-ray absorption in broad absorption line quasar: PHL 5200: GB 15085714, the first greater than 4 radio-selected quasar in X rays; Broad absorption line quasars observed by the ROSAT PSPC; and Optical detection of the hidden nuclear engine in NGC 4258.
Topics: INTERSTELLAR MATTER, MOLECULAR CLOUDS, MOLECULAR GASES, EMISSION SPECTRA, HYDROGEN, MASSIVE STARS,...
531
531
Jun 12, 2011
06/11
by
Trinh, Huu; Chen, C. P
texts
eye 531
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Recent experimental investigations and physical modeling studies have indicated that turbulence behaviors within a liquid jet have considerable effects on the atomization process. For certain flow regimes, it has been observed that the liquid jet surface is highly turbulent. This turbulence characteristic plays a key role on the breakup of the liquid jet near to the injector exit. Other experiments also showed that the breakup length of the liquid core is sharply shortened as the liquid jet is...
Topics: ASTRONOMICAL MODELS, SEYFERT GALAXIES, K LINES, EMISSION SPECTRA, X RAY TIMING EXPLORER,...
168
168
Jul 21, 2010
07/10
by
Whipple, E. C.; Mendis, D. A.; Northrop, T. G
texts
eye 168
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The potential distribution in a plasma containing dust grains were derived where the Debye length can be larger or smaller than the average intergrain spacing. Three models were treated for the grain-plasma system, with the assumption that the system of dust and plasma is charge-neutral: a permeable grain model, an impermeable grain model, and a capacitor model that does not require the nearest neighbor approximation of the other two models. A gauge-invariant form of Poisson's equation was used...
Topics: COMETS, GRANULAR MATERIALS, TEMPERATURE MEASUREMENT, THERMAL EMISSION, EMISSION SPECTRA, LIGHT...
The viscous decretion disk (VDD) model is able to explain most of the currently observable properties of the circumstellar disks of Be stars. However, more stringent tests, focusing on reproducing multitechnique observations of individual targets via physical modeling, are needed to study the predictions of the VDD model under specific circumstances. In the case of nearby, bright Be star b CMi, these circumstances are a very stable low-density disk and a late-type (B8Ve) central star. Aims. The...
Topics: DTIC Archive, NAVAL OBSERVATORY FLAGSTAFF AZ, *B TYPE STARS, EMISSION SPECTRA, INTERFEROMETRY,...
1,467
1.5K
Jul 12, 2010
07/10
by
NON
texts
eye 1,467
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State of the art of environment interactions dealing with low-Earth-orbit plasmas; high-voltage systems; spacecraft charging; materials effects; and direction of future programs are contained in over 50 papers.
Topics: EMISSION SPECTRA, HERBIG-HARO OBJECTS, LINE SPECTRA, SPATIAL DISTRIBUTION, ULTRAVIOLET SPECTRA,...
401
401
May 23, 2011
05/11
by
Aharon, I.; Shaw, B. D
texts
eye 401
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This investigation addresses the problem of hydrodynamic stability of a two-component droplet undergoing spherically-symmetrical gasification. The droplet components are assumed to have characteristic liquid species diffusion times that are large relative to characteristic droplet surface regression times. The problem is formulated as a linear stability analysis, with a goal of predicting when spherically-symmetric droplet gasification can be expected to be hydrodynamically unstable from...
Topics: POLYCYCLIC AROMATIC HYDROCARBONS, INFRARED SPECTROSCOPY, EMISSION SPECTRA, CATIONS, INTERSTELLAR...
405
405
Jul 12, 2010
07/10
by
Chandrasekaran, B
texts
eye 405
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A subsonic flow panel code has been modified to handle the effects of a propeller wake. The effects of the propeller were modelled by a system of ring vortices of constant strength. Principles based on the blade element theory, the vortex theory and the momentum theory were used to evaluate the axial velocity increase, the swirl velocity and the pressure increase across the propeller. Theoretical calculations are compared to experimental results at Mach numbers up to 0.70 over a range of angles...
Topics: GALACTIC NUCLEI, NEBULAE, ULTRAVIOLET SPECTRA, ACTIVE GALACTIC NUCLEI, EMISSION SPECTRA, IUE, LINE...
Measurement in the laboratory's 500-foot absorption cell of the intensity and shape of the 118.75 kMc/s oxygen line at gas pressures between 0.5 and 760 mm of Hg and frequencies =0.4 kMc/s of the line center frequency were completed. The line center attenuation and line half intensity-half width are approximately 1.4 db per km and 2 Mc/s per mm of Hg, respectively, for atmospheric oxygen at a temperature of 300 K and pressures where collisional broadening predominates.
Topics: DTIC Archive, TEXAS UNIV AT AUSTIN ELECTRICAL ENGINEERING RESEARCH LAB, *EMISSION SPECTRA, *OXYGEN,...
246
246
Jun 21, 2010
06/10
by
Chapman, R. M.; Kreisman, W. S.; Thole, J. M
texts
eye 246
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Inflation system for balloon type satellites
Topics: ARC WELDING, CONTAMINATION, EMISSION SPECTRA, GAS WELDING, SPECTRUM ANALYSIS, AIR POLLUTION,...
236
236
Jun 9, 2011
06/11
by
Ciardo, Gianfranco; Tilgner, Marc
texts
eye 236
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We discuss how to describe the Markov chain underlying a generalized stochastic Petri net using Kronecker operators on smaller matrices. We extend previous approaches by allowing both an extensive type of marking-dependent behavior for the transitions and the presence of immediate synchronizations. The derivation of the results is thoroughly formalized, including the use of Kronecker operators in the treatment of the vanishing markings and the computation of impulse-based reward measures. We...
Topics: QUARTZ, CATHODES, LUMINESCENCE, ARGON PLASMA, EMISSION SPECTRA, ELECTRIC POTENTIAL, STEADY STATE,...
384
384
Jul 26, 2010
07/10
by
NON
texts
eye 384
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In a parallel processing computer system with multiple processing units and shared memory, a method is disclosed for uniformly balancing the aggregate computational load in, and utilizing minimal memory by, a network having identical computations to be executed at each connection therein. Read-only and read-write memory are subdivided into a plurality of process sets, which function like artificial processing units. Said plurality of process sets is iteratively merged and reduced to the number...
Topics: ELECTRIC FIELDS, SHAPES, EMISSION SPECTRA, INFRARED DETECTORS, INFRARED RADIATION, PHOTOMETERS,...
105
105
Jul 21, 2010
07/10
by
Dhendecourt, L.; Leger, A
texts
eye 105
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In light of the recent identification of an infrared emission band at 3.3, 6.2, 7.7, 8.6, and 11 microns as emissions from pregraphitic molecules, the possibility that a large broad emission bump in the red part of the spectrum of the Red-Rectangle (AFGL 918) nebula is luminescence from the same molecules was investigated. The abundance, luminescence yield of the carrier, and the phosphorescence is discussed.
Topics: COSMIC DUST, GRAIN SIZE, INTERSTELLAR MATTER, REFLECTION NEBULAE, ABSORPTION SPECTRA, EMISSION...
301
301
May 23, 2011
05/11
by
Netterfield, C. Barth; Devlin, M. J.; Jarosik, Norman; Page, Lyman; Wollack, Ed J
texts
eye 301
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We report on a measurement of the angular power spectrum of the anisotropy in the Cosmic Microwave Background. The anisotropy is measured in 23 different multipole bands from l = 54 (approx. 3 deg.) to l = 404 (approx. 0.45 deg.) and in 6 frequency bands from 26 GHz to 46 GHz over three observing seasons. The measurements are consistent from year to year. The frequency spectral index of the fluctuations (measured at low l) is consistent with that of the CMB and inconsistent with either dust or...
Topics: EMISSION SPECTRA, MIRA VARIABLES, ULTRAVIOLET ASTRONOMY, STELLAR SPECTRA, ULTRAVIOLET SPECTRA, IUE,...
We have used the Extreme Ultraviolet Imaging Spectrometer (EIS) on the Hinode spacecraft to observe large areas of outflow near an active region. These outflows are seen to persist for at least 6 days. The emission line profiles suggest that the outflow region is composed of multiple outflowing components, Doppler- shifted with respect to each other. We have modeled this scenario by imposing a double-Gaussian fit to the line profiles. These fits represent the profile markedly better than a...
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC, *SPECTROMETERS, SPACECRAFT, EMISSION SPECTRA,...
277
277
Jun 9, 2011
06/11
by
Cahoon, Donald R.; Stocks, Brian J.; Levine, Joel S.; Cofer, Wesley R., III; O'Neill, Katherine P
texts
eye 277
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Savannas consist of a continuous layer of grass interspersed with scattered trees or shrubs, and cover approx. 10 million square kilometers of tropical Africa. African savanna fires, almost all resulting from human activities, may produce as much as a third of the total global emissions from biomass burning. Little is known, however, about the frequency and location of these fires, and the area burned each year. Emissions from African savanna burning are known to be transported over the...
Topics: MAGNETOACOUSTICS, EMISSION SPECTRA, FERROMAGNETIC MATERIALS, TENSILE STRESS, MICROSTRUCTURE,...
A method is disclosed which permits evaluation of soil moisture utilizing remote sensing. Spectral measurements at a plurality of different wavelengths are taken with respect to sample soils and the bidirectional reflectance factor (BRF) measurements produced are submitted to regression analysis for development therefrom of predictable equations calculated for orderly relationships. Soil of unknown reflective and unknown soil moisture tension is thereafter analyzed for bidirectional reflectance...
Topics: NASA Technical Reports Server (NTRS), EMISSION SPECTRA, REMOTE SENSING, SOIL MOISTURE, PATENTS,...
520
520
May 24, 2011
05/11
by
Wilcox, William R.; Regel, Liya L.; Smith, Reginald W
texts
eye 520
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This grant began in June of 1996. Its long term goal is to be able to control the microstructure of directionally solidified eutectic alloys, through an improved understanding of the influence of convection. The primary objective of the present projects is to test hypotheses for the reported influence of microgravity on the microstructure of three fibrous eutectics (MnBi-Bi, InSb-NiSb, Al3Ni-Al). A secondary objective is to determine the influence of convection on the microstructure of other...
Topics: AUSTIN COMET, BRORSEN-METCALF COMET, DISSOCIATION, HYDROGEN SULFIDE, EMISSION SPECTRA, SOLAR...
278
278
May 30, 2011
05/11
by
Morelli, Eugene A.; DeLoach, Richar
texts
eye 278
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A nonlinear modeling technique was used to characterize response surfaces for non-dimensional longitudinal aerodynamic force and moment coefficients, based on wind tunnel data from a commercial jet transport model. Data were collected using two experimental procedures - one based on modem design of experiments (MDOE), and one using a classical one factor at a time (OFAT) approach. The nonlinear modeling technique used multivariate orthogonal functions generated from the independent variable...
Topics: CARBON, LASER INDUCED FLUORESCENCE, NANOTUBES, PLUMES, SPECTROSCOPY, EMISSION SPECTRA, RESEARCH AND...
The detection of the (J,K) = a(4,3) yields s(3,3) rotation inversion transition of ammonia at 124.6 microns toward the center of the Orion-KL region is reported. The line is in emission and has a FWHM or = to 30 km s 0.15. The far IR ammonia line emission probably comes mainly from the 'hot core', a compact region of warm, very dense gas previously identified by the radio inversion lines of NH3. The a(4,3) yields s(3,3) line is very optically thick, and since it is seen in emission, radiative...
Topics: NASA Technical Reports Server (NTRS), AMMONIA, EMISSION SPECTRA, FAR INFRARED RADIATION,...
262
262
May 31, 2011
05/11
by
Lyle, Karen H.; Bark, Lindley W
texts
eye 262
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A research project has been initiated to improve crash test and analysis correlation. The research has focused on two specimen types: simple metallic beams and plates; and a representative composite fuselage section. Impact tests were performed under carefully controlled conditions. In addition, the specimens were densely instrumented to enable not only correlation with finite element simulations, but to also assess the repeatability of the data. Simulations utilizing a detailed finite element...
Topics: ACCRETION DISKS, BINARY STARS, CATACLYSMIC VARIABLES, EMISSION SPECTRA, SULFUR, SILICON, PLASMAS...
The attenuation of X-rays in Arnett's C-12 detonation supernova model is computed. The attenuation of X-rays in the filaments of the Crab Nebula is computed using a model for the filaments by Woltjer and a model by Davidson and Tucker. An empirical expression by Gorenstein, Kellogg, and Gursky for the optical thickness of the interstellar medium for three supernova remnants is analyzed.
Topics: NASA Technical Reports Server (NTRS), CRAB NEBULA, SUPERNOVAE, X RAYS, EMISSION SPECTRA, WAVE...
196
196
Jun 9, 2011
06/11
by
Ghaffari, F.; Bates, B.; Luckring, J.; Thomas, J
texts
eye 196
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Three dimensional transonic viscous flow computations are presented for a generic high-speed accelerator model which includes wing, body, filets,and a no-flow through engine nacelle. solutions are obtained from an algorithm for the compressible Navier-Stokes equations which incorporated an upwind-biased, flux-vector-splitting approach along with longitudinally-patched grids. Results are presented for fully turbulent flow assumptions and include correlations with wind tunnel data. A good...
Topics: SYNTHESIS (CHEMISTRY), TOXICITY, XYLENE, BENZENE, SENSITIVITY, ANTHRACENE, LUMINESCENCE, CHEMICAL...
102
102
Jun 11, 2011
06/11
by
DesMarais, D. J
texts
eye 102
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The physical and chemical interactions between the atmosphere, hydrosphere, geosphere and biosphere can be examined for elements such as carbon (C) and sulfur (S) that have played central roles for both life and the environment. The compounds of C are highly important, not only as organic matter, but also as atmospheric greenhouse gases, pH buffers in seawater, oxidation-reduction buffers virtually everywhere, and key magmatic constituents affecting plutonism and volcanism. S assumes important...
Topics: SEYFERT GALAXIES, IONIZED GASES, EXTRATERRESTRIAL MATTER, EMISSION SPECTRA, X RAY SOURCES, X RAYS,...
483
483
Jul 11, 2010
07/10
by
Walkmeyer, J. E., Jr.; Morgan, R. P.; Singh, J. P
texts
eye 483
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Costs and benefits of developing an operational educational satellite system in the U.S. are analyzed. Scenarios are developed for each educational submarket and satellite channel and ground terminal requirements for a large-scale educational telecommunications system are estimated. Alternative organizational frameworks for such a system are described.
Topics: ATOMIC STRUCTURE, ELECTRON EMISSION, EMISSION SPECTRA, SEMICONDUCTORS (MATERIALS), CURRENT DENSITY,...
Reprint: The Importance of Solar White-Light Flares.
Topics: DTIC Archive, Neidig, Donald F, PHILLIPS LAB HANSCOM AFB MA, *SOLAR FLARES, WHITE LIGHT, REPRINTS,...
347
347
Jul 11, 2010
07/10
by
Criswell, B. S.; Cobb, K
texts
eye 347
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The cellular immune response of ASTP crewmembers was studied before and after the flight. Parameters studied were white blood cell concentrations, lymphocyte numbers, B- and T-lymphocyte responsiveness to PHA, pokeweed mitogen, Concanavalin A, and influenza virus antigen. Changes in the responsiveness of peripheral blood lymphocytes to phytohemagglutinin (PHA) occurred in the cellular immune response but no quantitative changes in lymphocytes were noted. Results are compared with lymphocytic...
Topics: APOLLO SOYUZ TEST PROJECT, EMISSION SPECTRA, X RAY SOURCES, PERIODIC VARIATIONS, PULSARS, SUPERNOVA...
232
232
Jul 21, 2010
07/10
by
Mumma, M. J.; Jennings, D. E
texts
eye 232
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The characteristics of infrared molecular emissions induced by energetic collisions between ambient atmospheric species and surfaces in Earth orbit are investigated, using a low-nitrogen-cooled filter wheel photometer covering the wavelength range 0.9-.5 microns with a resolving power Lambda/Delta Lambda of approximately 100. This resolving power is sufficient for identification of the molecular or atomic fluorescent spaces causing the glow.
Topics: AEROSPACE ENVIRONMENTS, PLASMA SHEATHS, LIGHT EMISSION, MAGNETOHYDRODYNAMIC STABILITY, SPACE...
253
253
Jun 20, 2010
06/10
by
Kolobova, K. M.; Nemnonov, S. A
texts
eye 253
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X ray spectra, electron structure, and physical properties of titanium compounds
Topics: ATOMIC STRUCTURE, PHYSICAL PROPERTIES, TITANIUM COMPOUNDS, X RAY SPECTROSCOPY, ABSORPTION SPECTRA,...
226
226
Jul 21, 2010
07/10
by
Clarke, J. T
texts
eye 226
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Visible spacecraft glow was first observed on the Atmospheric Explorer spacecraft (AE-E) and studied in some detail with the Visible Airglow Experiment (VAE). The AE-E was a spin-stabilized spacecraft without thrusters at an altitude of 140 to 280 km. The VAE contained six visible wavelength photometers that measured a glow spectrum which: (1) rose steeply in the red, (2) decreased with a cos cubed PH1 dependence from pointing into the ram direction of the spacecraft orbital motion, and (3)...
Topics: AIRGLOW, SPACELAB, ULTRAVIOLET RADIATION, EMISSION SPECTRA, EMITTANCE, LUMINOSITY, SPACECRAFT...
884
884
Jun 12, 2011
06/11
by
NON
texts
eye 884
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The mission of the Journal of Air Transportation (JA is to provide the global community immediate key resource information in all areas of air transportation. The goal of the Journal is to be recognized as the preeminent scholarly journal in the aeronautical aspects of transportation. As an international and interdisciplinary journal, the JAT will provide a forum for peer-reviewed articles in all areas of aviation and space transportation research, policy, theory, case study, practice, and...
Topics: STELLAR PHYSICS, PHOTOSPHERE, STELLAR ATMOSPHERES, X RAY ASTRONOMY, STELLAR WINDS, STELLAR SPECTRA,...
An intensive program of observations of the Comet Halley during the week of the Vega 2 and Giotto encounters was carried out by the International Ultraviolet Explorer (IUE) satellite observatory. The IUE Fine Error Sensor, normally used for target acquisition and tracking, was used in a photometer mode to provide nealy continuous light curves over an 8 hour observing shift, a unique capability relative to ground-bases observers. The ultraviolet data can be used to derive an estimate of the...
Topics: NASA Technical Reports Server (NTRS), ABUNDANCE, EMISSION SPECTRA, GASES, HALLEY'S COMET, IUE,...
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Jul 21, 2010
07/10
by
Wdowiak, T. J.; Kubinec, W. R.; Nuth, J. A
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It is proposed to carry out slitless spectroscopy at ultraviolet wavelengths from orbit of meteoric debris associated with comets. The Eta Aquarid and Orionid/Halley and the Perseid/1962 862 Swift-Tuttle showers would be principal targets. Low light level, ultraviolet video technique will be used during night side of the orbit in a wide field, earthward viewing mode. Data will be stored in compact video cassette recorders. The experiment may be configured as a GAS package or in the HITCHHIKER...
Topics: DUST, MAGNESIUM, GAS ANALYSIS, INFRARED ASTRONOMY SATELLITE, IUE, M STARS, BALMER SERIES, CALCIUM,...
