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Sample records for experiences avec sira

  1. Shuttle Imaging Radar-A (SIR-A) experiment

    NASA Technical Reports Server (NTRS)

    Elachi, C. (Editor); Cimino, J. B. (Editor)

    1982-01-01

    The SIR-A experiment was conducted in order to acquire radar data over a variety of regions to further understanding of the radar signatures of various geologic features. The capability of the Shuttle as a scientific platform for observation of the Earth's resources was assessed. The SIR-A sensor operated nominally and the full data acquisition capacity of the optical recorder was used.

  2. Space Shuttle Columbia views the world with imaging radar: The SIR-A experiment

    NASA Technical Reports Server (NTRS)

    Ford, J. P.; Cimino, J. B.; Elachi, C.

    1983-01-01

    Images acquired by the Shuttle Imaging Radar (SIR-A) in November 1981, demonstrate the capability of this microwave remote sensor system to perceive and map a wide range of different surface features around the Earth. A selection of 60 scenes displays this capability with respect to Earth resources - geology, hydrology, agriculture, forest cover, ocean surface features, and prominent man-made structures. The combined area covered by the scenes presented amounts to about 3% of the total acquired. Most of the SIR-A images are accompanied by a LANDSAT multispectral scanner (MSS) or SEASAT synthetic-aperture radar (SAR) image of the same scene for comparison. Differences between the SIR-A image and its companion LANDSAT or SEASAT image at each scene are related to the characteristics of the respective imaging systems, and to seasonal or other changes that occurred in the time interval between acquisition of the images.

  3. Evaluation of SIR-A (Shuttle Imaging Radar) images from the Tres Marias region (Minas Gerais State, Brazil) using derived spatial features and registration with MSS-LANDSAT images

    NASA Technical Reports Server (NTRS)

    Parada, N. D. J. (Principal Investigator); Kux, H. J. H.; Dutra, L. V.

    1984-01-01

    Two image processing experiments are described using a MSS-LANDSAT scene from the Tres Marias region and a shuttle Imaging Radar SIR-A image digitized by a vidicon scanner. In the first experiment the study area is analyzed using the original and preprocessed SIR-A image data. The following thematic classes are obtained: (1) water, (2) dense savanna vegetation, (3) sparse savanna vegetation, (4) reforestation areas and (5) bare soil areas. In the second experiment, the SIR-A image was registered together with MSS-LANDSAT bands five, six, and seven. The same five classes mentioned above are obtained. These results are compared with those obtained using solely MSS-LANDSAT data. The spatial information as well as coregistered SIR-A and MSS-LANDSAT data can increase the separability between classes, as compared to the use of raw SIR-A data solely.

  4. Nouvelles Limites sur la Detection Directe de la Matiere Sombre avec l'Experience PICASSO

    NASA Astrophysics Data System (ADS)

    Piro, Marie-Cecile

    Astronomical and cosmological observations strongly suggest the presence of an exotic form of non-relativistic, non-baryonic matter that would represent 26% of the actual energy-matter content of the Universe. This so-called cold dark matter would be composed of Weakly Interactive Massive Particles (WIMP). PICASSO (Project In CAnada to Search for Supersymmetric Objects) aims to detect directly one of the dark matter candidates proposed in the framework of supersymmetric extensions of the standard model : the neutralino. The experiment is installed in the SNOLAB underground laboratory at Sudbury (Ontario) and uses superheated C4F10 droplets detectors, a variant of bubble chamber technique. Phase transitions in the superheated liquids are triggered by 19F recoils caused by the elastic collision with neutralinos and create an acoustic signal which is recorded by piezoelectric sensors. This thesis presents recent progress in PICASSO leading to a substantially increased sensitivity in the search of neutralinos. New fabrication and purification procedures allowed a background reduction of about a factor 10 of the major detectors contamination caused by alpha emitters. Detailed studies allowed to localize these emitters in the detectors. In addition, data analysis efforts were able to improve substantially the discrimination between alpha particle induced events and those created by nuclear recoils. New analysis tools were also developed in order to discriminate between particle induced and non-particle induced events, such as electronic backgrounds and acoustic noise signals. An important new background suppression mechanism at higher temperatures led to the present improved sensitivity of PICASSO at low WIMP masses.

  5. Structure and interactions of the Bacillus subtilis sporulation inhibitor of DNA replication, SirA, with domain I of DnaA

    PubMed Central

    Jameson, Katie H; Rostami, Nadia; Fogg, Mark J; Turkenburg, Johan P; Grahl, Anne; Murray, Heath; Wilkinson, Anthony J

    2014-01-01

    Chromosome copy number in cells is controlled so that the frequency of initiation of DNA replication matches that of cell division. In bacteria, this is achieved through regulation of the interaction between the initiator protein DnaA and specific DNA elements arrayed at the origin of replication. DnaA assembles at the origin and promotes DNA unwinding and the assembly of a replication initiation complex. SirA is a DnaA-interacting protein that inhibits initiation of replication in diploid Bacillus subtilis cells committed to the developmental pathway leading to formation of a dormant spore. Here we present the crystal structure of SirA in complex with the N-terminal domain of DnaA revealing a heterodimeric complex. The interacting surfaces of both proteins are α-helical with predominantly apolar side-chains packing in a hydrophobic interface. Site-directed mutagenesis experiments confirm the importance of this interface for the interaction of the two proteins in vitro and in vivo. Localization of GFP–SirA indicates that the protein accumulates at the replisome in sporulating cells, likely through a direct interaction with DnaA. The SirA interacting surface of DnaA corresponds closely to the HobA-interacting surface of DnaA from Helicobacter pylori even though HobA is an activator of DnaA and SirA is an inhibitor. PMID:25041308

  6. Shuttle Experimental Radar for Geological Exploration (SERGE) project: Field work relating to the Shuttle Experimental Radar A (SIR-A) in Brazil (phase 2)

    NASA Technical Reports Server (NTRS)

    Balieiro, M. G.; Martini, P. R.; Dossantos, J. R.; Demattos, J. T.

    1984-01-01

    The ground observations undertaken over the northern position of Minas Gerais State, and part of Distrito Federal from 7 to 12 December 1982, along the Space Shuttle 2 flying orbit 22 of November 1981 are described. Field data related mostly with lithology, geological structures and forest cover, and specific geomorphological and pedological aspects were collected. Ground data are applied to evaluate the SIR-A Experiment, developed in the Space Shuttle-2 mission for natural resources mapping and prospecting.

  7. Analysis of coregistered Landsat, Seasat and SIR-A images of varied terrain types

    NASA Technical Reports Server (NTRS)

    Rebillard, P.; Evans, D.

    1983-01-01

    Multisensor image data (SIR-A, Seasat SAR and Landsat MSS) over areas in nothern Algeria and eastern Utah have been coregistered in order to assess the complementary effects of the orbital sensors for geologic mapping in two very different terrains. This first attempt at registering such a data set shows that the radar backscatter information provided by the SIR-A image increases the classification accuracy of several geologic units over the Landsat image alone, and over combined Landsat and Seasat images.

  8. Rapid Optimization of Engineered Metabolic Pathways with Serine Integrase Recombinational Assembly (SIRA).

    PubMed

    Merrick, C A; Wardrope, C; Paget, J E; Colloms, S D; Rosser, S J

    2016-01-01

    Metabolic pathway engineering in microbial hosts for heterologous biosynthesis of commodity compounds and fine chemicals offers a cheaper, greener, and more reliable method of production than does chemical synthesis. However, engineering metabolic pathways within a microbe is a complicated process: levels of gene expression, protein stability, enzyme activity, and metabolic flux must be balanced for high productivity without compromising host cell viability. A major rate-limiting step in engineering microbes for optimum biosynthesis of a target compound is DNA assembly, as current methods can be cumbersome and costly. Serine integrase recombinational assembly (SIRA) is a rapid DNA assembly method that utilizes serine integrases, and is particularly applicable to rapid optimization of engineered metabolic pathways. Using six pairs of orthogonal attP and attB sites with different central dinucleotide sequences that follow SIRA design principles, we have demonstrated that ΦC31 integrase can be used to (1) insert a single piece of DNA into a substrate plasmid; (2) assemble three, four, and five DNA parts encoding the enzymes for functional metabolic pathways in a one-pot reaction; (3) generate combinatorial libraries of metabolic pathway constructs with varied ribosome binding site strengths or gene orders in a one-pot reaction; and (4) replace and add DNA parts within a construct through targeted postassembly modification. We explain the mechanism of SIRA and the principles behind designing a SIRA reaction. We also provide protocols for making SIRA reaction components and practical methods for applying SIRA to rapid optimization of metabolic pathways.

  9. The spaceborne infrared atmospheric sounder for geosynchronous earth orbit (SIRAS-G): pathfinder to space

    NASA Astrophysics Data System (ADS)

    Kampe, Thomas U.; Chase, Holden

    2007-09-01

    The Spaceborne Infrared Sounder for Geosynchronous Earth Orbit (SIRAS-G) was developed by Ball Aerospace and Technologies Corp (BATC) under NASA's 2002 Instrument Incubator Program. SIRAS-G is a technology development program focused on next-generation IR imaging spectrometers for sounding of the atmosphere. SIRAS-G is ideally suited for measuring atmospheric temperature and water vapor profiles, trace gases concentrations, land and ocean surface temperatures and the IR mineral dust aerosol signature from satellite, providing high-spectral resolution imaging spectroscopy over a broad IR spectral range and extended field of view. Instrument concepts for future mission in LEO and GEO are discussed, including an instrument concept to be flown in low earth orbit having the potential to provide high spatial resolution, comparable to that of MODIS, along with the high spectral resolution currently being demonstrated by the Atmospheric Infrared Sounder (AIRS). This capability would dramatically improve the yield of cloud-free pixels scenes that can be assimilated into Numerical Weather Prediction (NWP) models. The SIRAS-G dispersive spectrometer module is readily adaptable for missions in LEO, GEO and MEO orbits and can be optimized for spectral resolution over subsets of the total spectral range. We have completed the 3-year SIRAS-G IIP development effort, including successful testing of the SIRAS-G laboratory demonstration spectrometer that utilized the Hawaii 1RG MWIR FPA. Performance testing was conducted at cryogenic temperatures and the performance of the demo instrument has been quantified including measurement of keystone distortion, spectral smile, MTF, and the spectral response function (SRF) to high accuracy. We present the results of the laboratory instrument development including characterization of the demonstration instrument performance. We discuss instrument concepts utilizing SIRAS-G technology for potential future missions including an anticipated

  10. Specificity of Staphyloferrin B recognition by the SirA receptor from Staphylococcus aureus.

    PubMed

    Grigg, Jason C; Cheung, Johnson; Heinrichs, David E; Murphy, Michael E P

    2010-11-05

    Many organisms use sophisticated systems to acquire growth-limiting iron. Iron limitation is especially apparent in bacterial pathogens of mammalian hosts where free iron concentrations are physiologically negligible. A common strategy is to secrete low molecular weight iron chelators, termed siderophores, and express high affinity receptors for the siderophore-iron complex. Staphylococcus aureus, a widespread pathogen, produces two siderophores, staphyloferrin A (SA) and staphyloferrin B (SB). We have determined the crystal structure of the staphyloferrin B receptor, SirA, at high resolution in both the apo and Fe(III)-SB (FeSB)-bound forms. SirA, a member of the class III binding protein family of metal receptors, has N- and C-terminal domains, each composed of mainly a β-stranded core and α-helical periphery. The domains are bridged by a single α-helix and together form the FeSB binding site. SB coordinates Fe(III) through five oxygen atoms and one nitrogen atom in distorted octahedral geometry. SirA undergoes conformational change upon siderophore binding, largely securing two loops from the C-terminal domain to enclose FeSB with a low nanomolar dissociation constant. The staphyloferrin A receptor, HtsA, homologous to SirA, also encloses its cognate siderophore (FeSA); however, the largest conformational rearrangements involve a different region of the C-terminal domain. FeSB is uniquely situated in the binding pocket of SirA with few of the contacting residues being conserved with those of HtsA interacting with FeSA. Although both SirA and HtsA bind siderophores from the same α-hydroxycarboxylate class, the unique structural features of each receptor provides an explanation for their distinct specificity.

  11. Characteristics of playa deposits as seen on SIR-A, Seasat and Landsat coregistered data

    NASA Technical Reports Server (NTRS)

    Rebillard, PH.; Naraghi, M.

    1984-01-01

    A classification technique currently under development has been applied for the qualitative study of a playa located in Northeastern Algeria using coregistered SIR-A, Seasat and Landsat MSS 7 data. This classification which is texture based can be applied to only single band imagery at this time. The first results are very encouraging and reach conclusions similar to those obtained with more time consuming classifiers. The signature of each class is well expressed for the Landsat picture. Misclasifications occur with the SIR-A or Seasat images.

  12. An evaluation of a SIRA image to determine forest density under conditions of moderate topographical variation

    NASA Technical Reports Server (NTRS)

    Smith, M.; Adams, J.

    1985-01-01

    Many studies have shown that radar images have increased classification accuracy over spectral classifications using only LANDSAT Multispectral Band Scanner (MSS) images. It was the objective to determine if a SIRA image taken over Hayfork when used alone or inconjuction with LANDSAT MSS data would increase separation of units not identified by LANSAT spectral mixture models. Areas in the LANDSAT model of varying vegetation density (0 to 50%) that had proven to be accurate by field surveys were compared. It was found in the Hayfork area that SIRA did not increase or help delineation of vegetation or ultramific units over LANDSAT MSS.

  13. Comparison of the MURA and an improved single-receptor (SIRA) trajectory source apportionment (TSA) method using artificial sources

    NASA Astrophysics Data System (ADS)

    Lee, Stephanie; Ashbaugh, Lowell

    Two trajectory source apportionment methods were tested using an artificially generated data set to determine their ability to detect the known sources. The forward-looking step from the multi-receptor trajectory analysis (MURA) method was added to the conditional probability (CP)method of Ashbaugh et al. [1985. A residence time probability analysis of sulfur concentrations at Grand Canyon National Park. Atmospheric Environment 19(8), 1263-1270] to develop the single-receptor forward CP (SIRA) method. The multi-receptor (MURA) and the SIRA methods were tested with three simulations using artificially generated sources. The ability of the methods to detect the sources was quantified for each simulation. The first simulation showed that the SIRA method is an improvement over the original CP method. The MURA trajectory method proved to be superior at identifying sources for the simulation located in the west and comparable to the SIRA method for the two simulations located in the east.

  14. The octaheme SirA catalyses dissimilatory sulfite reduction in Shewanella oneidensis MR-1

    SciTech Connect

    Shirodkar, Sheetal; Reed, Samantha B.; Romine, Margaret F.; Saffarini, Daad

    2011-01-01

    Shewanella oneidensis MR-1 is a metal reducer that uses a large number of electron acceptors that include thiosulfate, polysulfide, and sulfite. The enzyme required for thiosulfate and polysulfide respiration has been recently identified, but the mechanisms of sulfite reduction remained unexplored. Analysis of MR-1 cultures grown anaerobically with sulfite suggested that the dissimilatory sulfite reductase catalyzes six-electron reduction of sulfite to sulfide. Reduction of sulfite required menaquinones and c cytochromes but appeared to be independent of the intermediate electron carrier CymA. Furthermore, the terminal sulfite reductase, SirA, was identified as an octaheme c cytochrome with an atypical heme binding site that represents a new class of sulfite reductases. The sirA locus was identified in the genomes of several sequenced Shewanella genomes, and its presence appears to be linked to the ability of these organisms to reduce sulfite under anaerobic conditions.

  15. An exploitation of coregistered SIR-A, Seasat and Landsat images

    NASA Technical Reports Server (NTRS)

    Rebillard, P.; Nguyen, T. P.

    1983-01-01

    Multispectral registration and classification of SIR-A, Seasat SAR, and Landsat MSS data is presented over two playas located in the northeastern Algerian Sahara. A supervised classification was made over six classes: salt, palm trees, dunes, limestones, gypsum and sand. The best classification is obtained by using all of the data. The images using radar only misclassify trees and salt, limestone and dunes, gypsum and dunes. Landsat only gives a good map but lacks the roughness information contained in the radar data. The Landsat/SIR-A combination gives a better classification than the Landsat/Seasat combination. Density number histograms computed within several classes on the Seasat and SIR-A data show the misclassification is mainly due to the Seasat data.

  16. Pinacate-gran Desierto Region, Mexico: SIR-A Data Analysis

    NASA Technical Reports Server (NTRS)

    Christensen, P.; Greeley, R.; Mchone, J.; Asmerom, Y.; Barnett, S.

    1984-01-01

    Radar images (SIR-A) from the Columbia space shuttle were used to assess the radar returns of terrain shaped by volcanic, aeolian, and fluvial processes in northwest Sonora. Field studies and photointerpretation show that sand dunes are poorly imaged by SIR-A, in contrast to SEASAT, evidently a consequence of the greater SIR-A incidence angle; star dunes are visible only as small bright spots representing merging arms at dune apices which may act as corner reflectors. Desert grasses and bushes (approx. 2 m high) have little effect on radar brightness. Only larger trees with woody trunks approx. 0.5 m across are effective radar reflectors; their presence contributes to radar bright zones along some arroyos. The radar brightness of lava flows decreases with surface roughness and presence of mantling windblown sediments and weathering products; however, old uplifted (faulted) flows are of equal brightness to fresh, unmantled aa flows. Maar craters display circular patterns of varying radar brightness which represent a combination of geometry, slope, and distribution of surface materials. Some radar bright rings in the Pinacates resemble craters on radar but are observed to be playas encircled by trees.

  17. Communications, Navigation, and Timing Constraints for the Solar Imaging Radio Array (SIRA)

    NASA Astrophysics Data System (ADS)

    Lemaster, E. A.; Byler, E. A.; Aschwanden, M. J.

    2003-12-01

    The Solar Imaging Radio Array (SIRA) is a proposed NASA mission to measure solar radio emissions in the 30kHz to 30MHz region of the electromagnetic spectrum. The baseline design consists of 16 separated spacecraft in an irregular pattern several kilometers across. Each spacecraft is equipped with a pair of crossed dipole antennas that together form a 16-element radio interferometer for Fourier-type image reconstruction (120 baselines in the UV-plane). The required close coordination between this formation of spacecraft places many unique constraints on the SIRA communications, navigation, control, and timing architectures. Current specifications call for knowledge of the relative locations of the spacecraft to approximately meter-level accuracy in order to maintain primary instrument resolution. Knowledge of the relative timing differences between the clocks on the spacecraft must likewise be maintained to tens of nanoseconds or better. This in turn sets a minimum bound on the regularity of communications updates between spacecraft. Although the actual positions of the spacecraft are not tightly constrained, enough control authority and system autonomy must be present to keep the spacecraft from colliding due to orbital perturbations. Each of these constraints has an important effect on the design of the architecture for the entire array. This paper examines the engineering requirements and design tradeoffs for the communications, navigation, and timing architectures for SIRA. Topics include the choice of navigation sensor, communications methodology and modulation schemes, and clock type to meet the overall system performance goals while overcoming issues such as communications dynamic range, bandwidth limitations, power constraints, available antenna beam patterns, and processing limitations. In addition, this paper discusses how the projected use of smaller spacecraft buses with their corresponding payload and cost limits has important consequences for the

  18. Tectonic geomorphology of the Andes with SIR-A and SIR-B

    NASA Technical Reports Server (NTRS)

    Bloom, Arthur L.; Fielding, Eric J.

    1986-01-01

    Data takes from SIR-A and SIR-B (Shuttle Imaging Radar) crossed all of the principal geomorphic provinces of the central Andes between 17 and 34 S latitude. In conjunction with Thematic Mapping images and photographs from hand-held cameras as well as from the Large Format Camera that was flown with SIR-B, the radar images give an excellent sampling of Andean geomorphology. In particular, the radar images show new details of volcanic rocks and landforms of late Cenozoic age in the Puna, and the exhumed surfaces of tilted blocks of Precambrian crystalline basement in the Sierras Pampeanas.

  19. In-house SIRAS phasing of the polyunsaturated fatty-acid isomerase from Propionibacterium acnes

    SciTech Connect

    Liavonchanka, Alena; Hornung, Ellen; Feussner, Ivo; Rudolph, Markus

    2006-02-01

    Low iodide concentrations were sufficient to allow SAD and SIRAS phasing of cubic crystals of a novel fatty acid isomerase using Cu Kα radiation. The polyenoic fatty-acid isomerase from Propionibacterium acnes (PAI) catalyzes the double-bond isomerization of linoleic acid to conjugated linoleic acid, which is a dairy- or meat-derived fatty acid in the human diet. PAI was overproduced in Escherichia coli and purified to homogeneity as a yellow-coloured protein. The nature of the bound cofactor was analyzed by absorption and fluorescence spectroscopy. Single crystals of PAI were obtained in two crystal forms. Cubic shaped crystals belong to space group I2{sub 1}3, with a unit-cell parameter of 160.4 Å, and plate-like crystals belong to the monoclinic space group C2, with unit-cell parameters a = 133.7, b = 60.8, c = 72.2 Å, β = 115.8°. Both crystal forms contain one molecule per asymmetric unit and diffract to a resolution of better than 2.0 Å. Initial phases were obtained by SIRAS from in-house data from a cubic crystal that was soaked with an unusually low KI concentration of 0.25 M.

  20. Membrane protein structure determination by SAD, SIR, or SIRAS phasing in serial femtosecond crystallography using an iododetergent

    PubMed Central

    Nakane, Takanori; Hanashima, Shinya; Suzuki, Mamoru; Saiki, Haruka; Hayashi, Taichi; Kakinouchi, Keisuke; Sugiyama, Shigeru; Kawatake, Satoshi; Matsuoka, Shigeru; Matsumori, Nobuaki; Nango, Eriko; Kobayashi, Jun; Shimamura, Tatsuro; Kimura, Kanako; Mori, Chihiro; Kunishima, Naoki; Sugahara, Michihiro; Takakyu, Yoko; Inoue, Shigeyuki; Masuda, Tetsuya; Hosaka, Toshiaki; Tono, Kensuke; Joti, Yasumasa; Kameshima, Takashi; Hatsui, Takaki; Inoue, Tsuyoshi; Nureki, Osamu; Iwata, So; Murata, Michio; Mizohata, Eiichi

    2016-01-01

    The 3D structure determination of biological macromolecules by X-ray crystallography suffers from a phase problem: to perform Fourier transformation to calculate real space density maps, both intensities and phases of structure factors are necessary; however, measured diffraction patterns give only intensities. Although serial femtosecond crystallography (SFX) using X-ray free electron lasers (XFELs) has been steadily developed since 2009, experimental phasing still remains challenging. Here, using 7.0-keV (1.771 Å) X-ray pulses from the SPring-8 Angstrom Compact Free Electron Laser (SACLA), iodine single-wavelength anomalous diffraction (SAD), single isomorphous replacement (SIR), and single isomorphous replacement with anomalous scattering (SIRAS) phasing were performed in an SFX regime for a model membrane protein bacteriorhodopsin (bR). The crystals grown in bicelles were derivatized with an iodine-labeled detergent heavy-atom additive 13a (HAD13a), which contains the magic triangle, I3C head group with three iodine atoms. The alkyl tail was essential for binding of the detergent to the surface of bR. Strong anomalous and isomorphous difference signals from HAD13a enabled successful phasing using reflections up to 2.1-Å resolution from only 3,000 and 4,000 indexed images from native and derivative crystals, respectively. When more images were merged, structure solution was possible with data truncated at 3.3-Å resolution, which is the lowest resolution among the reported cases of SFX phasing. Moreover, preliminary SFX experiment showed that HAD13a successfully derivatized the G protein-coupled A2a adenosine receptor crystallized in lipidic cubic phases. These results pave the way for de novo structure determination of membrane proteins, which often diffract poorly, even with the brightest XFEL beams. PMID:27799539

  1. Use of SIR-A and Landsat MSS data in mapping shrub and intershrub vegetation at Koonamore, South Australia

    NASA Technical Reports Server (NTRS)

    Green, G. M.

    1986-01-01

    Shrublands cover much of the interior of the Australian continent and support a large grazing industry. Distinguishing the woody perennial vegetation from the smaller herbaceous vegetation and soil-encrusting lichen found between the shrubs is critical for range management but is difficult to do using Landsat data alone. In this study Shuttle Imaging Radar-A (SIR-A) and Landsat data acquired over Koonamore Station are examined together. Given the low topography and fine textured soils at Koonamore, radar return should be primarily determined by the percent area occupied by shrubs. During periods when most of the vegetation was non-vigorous and spectrally homogeneous, SIR-A data, as a surrogate measure of shrub cover, allowed the reflectance due to shrubs in Landsat data to be separated from the reflectance due to the intervening ground. This method allows estimation of the intershrub reflectance properties that are related to herbaceous vegetation, lichen, and bare soil exposures.

  2. Use of SIR-A and Landsat MSS data in mapping shrub and intershrub vegetation at Koonamore, South Australia

    NASA Technical Reports Server (NTRS)

    Green, G. M.

    1986-01-01

    Shrublands cover much of the interior of the Australian continent and support a large grazing industry. Distinguishing the woody perennial vegetation from the smaller herbaceous vegetation and soil-encrusting lichen found between the shrubs is critical for range management but is difficult to do using Landsat data alone. In this study Shuttle Imaging Radar-A (SIR-A) and Landsat data acquired over Koonamore Station are examined together. Given the low topography and fine textured soils at Koonamore, radar return should be primarily determined by the percent area occupied by shrubs. During periods when most of the vegetation was non-vigorous and spectrally homogeneous, SIR-A data, as a surrogate measure of shrub cover, allowed the reflectance due to shrubs in Landsat data to be separated from the reflectance due to the intervening ground. This method allows estimation of the intershrub reflectance properties that are related to herbaceous vegetation, lichen, and bare soil exposures.

  3. Hydrodynamics of internal solitons and a comparison of SIR-A and SIR-B data with ocean measurements

    NASA Technical Reports Server (NTRS)

    Apel, J. R.; Gasparovic, R. F.; Thompson, D. R.

    1986-01-01

    Large internal solitary waves have been observed by Shuttle SIR-A and SIR-B at locations in the Andaman Sea and the New York Bight. Satellite imagery and oceanographic measurements are used in conjunction with hydrodynamic interaction and electromagnetic scattering models to estimate the expected SAR image intensity modulations associated with the internal waves. There is reasonable agreement between the predicted and observed internal wave signatures.

  4. Talemzane - Algerian impact crater detected on SIR-A orbital imaging radar

    NASA Astrophysics Data System (ADS)

    McHone, John F.; Greeley, Ronald

    1987-09-01

    In November, 1981, NASA's first Shuttle Imaging Radar mission (SIR-A) began producing maplike photographic strips of Earth scenes from orbital altitude. A Saharan radar image acquired over Algeria clearly delineates two sedimentary basins, Erg Occidental and Erg Oriental, separated by an elongated zone of exposed bedrock, the M'Zab Chebka. At the NE margin of the Chebka, rimrocks, slopes, and ejecta deposits of Talemzane meteorite impact crater appear as a distinct two km wide radar-bright ring. This unique circle of strong radar backscatter distinguishes the solitary impact structure from numerous dayas (similarly appearing karstic depressions) which characterize the region. The crater is prominent on radar, but is obscure on optically obtained satellite and aircraft images, as are partly buried fluvial drainage systems and fault-block traces developed in bedrocks of the Chebka. Radar detection of an annular drainage system indicates possible presence of a ring graben at the crater. Brightest radar signals on the image are cultural features at recently developed gas fields near Hassi er R'Mel.

  5. Talemzane - Algerian impact crater detected on SIR-A orbital imaging radar

    NASA Technical Reports Server (NTRS)

    Mchone, John F.; Greeley, Ronald

    1987-01-01

    In November, 1981, NASA's first Shuttle Imaging Radar mission (SIR-A) began producing maplike photographic strips of Earth scenes from orbital altitude. A Saharan radar image acquired over Algeria clearly delineates two sedimentary basins, Erg Occidental and Erg Oriental, separated by an elongated zone of exposed bedrock, the M'Zab Chebka. At the NE margin of the Chebka, rimrocks, slopes, and ejecta deposits of Talemzane meteorite impact crater appear as a distinct two km wide radar-bright ring. This unique circle of strong radar backscatter distinguishes the solitary impact structure from numerous dayas (similarly appearing karstic depressions) which characterize the region. The crater is prominent on radar, but is obscure on optically obtained satellite and aircraft images, as are partly buried fluvial drainage systems and fault-block traces developed in bedrocks of the Chebka. Radar detection of an annular drainage system indicates possible presence of a ring graben at the crater. Brightest radar signals on the image are cultural features at recently developed gas fields near Hassi er R'Mel.

  6. Geologic observations of the northern boundary of the Caribbean plate across central America as seen by Seasat and SIR-A

    NASA Technical Reports Server (NTRS)

    Rebillard, P.; Dixon, T.; Farr, T.

    1982-01-01

    The radar data analyzed here extend from the Amatique Bay (Golfo de Honduras) in the northeast to the Pacific Ocean (Puenta Remedios) in the southwest. Space Shuttle Imaging Radar (SIR-A) data-take 18 overlaps the principal part of the Seasat mosaic. SIR-A data make possible more observations over the Central American Cordillera, where strong layover limited the amount of information obtained by Seasat. The radar coverage delineates the principal strike-slip faults of the region (Cuilco-Chixoy-Polochic, Motagua and Jocotan), which have acted as the Caribbean-Americas plate boundary. It also demarcates volcanic terranes related to subduction of the Cocos Plate under the Caribbean Plate. Within pumice fields of the Tertiary volcanic belt, the use of two Seasat look directions (rev 759 and rev 1211), in conjunction with SIR-A data, makes possible some rock discrimination.

  7. The interpretation of digital recordings of SIR-A, Seasat, and Landsat data of the Algerian salt deposits

    NASA Technical Reports Server (NTRS)

    Rebillard, P.; Ballais, J.-P.

    1983-01-01

    Seasat and SIR-A SAR and Landsat MSS imagery of the salt beds of western Algeria are compared. The Landsat image was made 5 yr before the Seasat image, which was taken nearly 9 yr before the Shuttle radar image. The latter was processed in the visible channel. Differences in the backscatter in the radar imagery are attributed to the viewing angle and the characteristics of each salt deposit. The imagery allowed a determination of the changes in the shapes and areal extent of the salt pools over time, as well as alterations in nearby vegetation cover and the evolution of aeolian formations.

  8. La qualite des services de garde en milieu scolaire: relation avec la formation et l'experience du personnel (Relationship between the Quality of School-Age Child Care and Training and Experience of Staff).

    ERIC Educational Resources Information Center

    Baillargeon, Madeleine; Larouche, Helene; Roy, Chantal

    1999-01-01

    Investigated the relationship between the quality of after-school child care programs in Quebec and the education and experience of staff. Based on questionnaire responses of teachers and administrators, 26 programs were rated using the School-Age Care Environment Rating Scale. Found correlations between program directors' experience and program…

  9. Genomic Targets and Features of BarA-UvrY (-SirA) Signal Transduction Systems

    PubMed Central

    Zere, Tesfalem R.; Vakulskas, Christopher A.; Leng, Yuanyuan; Pannuri, Archana; Potts, Anastasia H.; Dias, Raquel; Tang, Dongjie; Kolaczkowski, Bryan; Georgellis, Dimitris; Ahmer, Brian M. M.; Romeo, Tony

    2015-01-01

    The two-component signal transduction system BarA-UvrY of Escherichia coli and its orthologs globally regulate metabolism, motility, biofilm formation, stress resistance, virulence of pathogens and quorum sensing by activating the transcription of genes for regulatory sRNAs, e.g. CsrB and CsrC in E. coli. These sRNAs act by sequestering the RNA binding protein CsrA (RsmA) away from lower affinity mRNA targets. In this study, we used ChIP-exo to identify, at single nucleotide resolution, genomic sites for UvrY (SirA) binding in E. coli and Salmonella enterica. The csrB and csrC genes were the strongest targets of crosslinking, which required UvrY phosphorylation by the BarA sensor kinase. Crosslinking occurred at two sites, an inverted repeat sequence far upstream of the promoter and a site near the -35 sequence. DNAse I footprinting revealed specific binding of UvrY in vitro only to the upstream site, indicative of additional binding requirements and/or indirect binding to the downstream site. Additional genes, including cspA, encoding the cold-shock RNA-binding protein CspA, showed weaker crosslinking and modest or negligible regulation by UvrY. We conclude that the global effects of UvrY/SirA on gene expression are primarily mediated by activating csrB and csrC transcription. We also used in vivo crosslinking and other experimental approaches to reveal new features of csrB/csrC regulation by the DeaD and SrmB RNA helicases, IHF, ppGpp and DksA. Finally, the phylogenetic distribution of BarA-UvrY was analyzed and found to be uniquely characteristic of γ-Proteobacteria and strongly anti-correlated with fliW, which encodes a protein that binds to CsrA and antagonizes its activity in Bacillus subtilis. We propose that BarA-UvrY and orthologous TCS transcribe sRNA antagonists of CsrA throughout the γ-Proteobacteria, but rarely or never perform this function in other species. PMID:26673755

  10. Evaluation of SIR-A space radar for geologic interpretation: United States, Panama, Colombia, and New Guinea

    NASA Technical Reports Server (NTRS)

    Macdonald, H.; Waite, W. P.; Kaupp, V. H.; Bridges, L. C.; Storm, M.

    1983-01-01

    Comparisons between LANDSAT MSS imagery, and aircraft and space radar imagery from different geologic environments in the United States, Panama, Colombia, and New Guinea demonstrate the interdependence of radar system geometry and terrain configuration for optimum retrieval of geologic information. Illustrations suggest that in the case of space radars (SIR-A in particular), the ability to acquire multiple look-angle/look-direction radar images of a given area is more valuable for landform mapping than further improvements in spatial resolution. Radar look-angle is concluded to be one of the most important system parameters of a space radar designed to be used for geologic reconnaissance mapping. The optimum set of system parameters must be determined for imaging different classes of landform features and tailoring the look-angle to local topography.

  11. Genes ycfR, sirA and yigG contribute to the surface attachment of Salmonella enterica Typhimurium and Saintpaul to fresh produce.

    PubMed

    Salazar, Joelle K; Deng, Kaiping; Tortorello, Mary Lou; Brandl, Maria T; Wang, Hui; Zhang, Wei

    2013-01-01

    Salmonella enterica is a frequent contaminant of minimally-processed fresh produce linked to major foodborne disease outbreaks. The molecular mechanisms underlying the association of this enteric pathogen with fresh produce remain largely unexplored. In our recent study, we showed that the expression of a putative stress regulatory gene, ycfR, was significantly induced in S. enterica upon exposure to chlorine treatment, a common industrial practice for washing and decontaminating fresh produce during minimal processing. Two additional genes, sirA involved in S. enterica biofilm formation and yigG of unknown function, were also found to be differentially regulated under chlorine stress. To further characterize the roles of ycfR, sirA, and yigG in S. enterica attachment and survival on fresh produce, we constructed in-frame deletions of all three genes in two different S. enterica serovars, Typhimurium and Saintpaul, which have been implicated in previous disease outbreaks linked to fresh produce. Bacterial attachment to glass and polystyrene microtiter plates, cell aggregation and hydrophobicity, chlorine resistance, and surface attachment to intact spinach leaf and grape tomato were compared among wild-type strains, single-gene deletion mutants, and their respective complementation mutants. The results showed that deletions of ycfR, sirA, and yigG reduced bacterial attachment to glass and polystyrene as well as fresh produce surface with or without chlorine treatment in both Typhimurium and Saintpaul. Deletion of ycfR in Typhimurium significantly reduced bacterial chlorine resistance and the attachment to the plant surfaces after chlorinated water washes. Deletions of ycfR in Typhimurium and yigG in Saintpaul resulted in significant increase in cell aggregation. Our findings suggest that ycfR, sirA, and yigG collectively contribute to S. enterica surface attachment and survival during post-harvest minimal processing of fresh produce.

  12. AVEC: A Computational Design Environment for Conceptual Innovations

    DTIC Science & Technology

    2008-02-01

    SUPPLEMENTARY NOTES PAO Case Number: AFRL/WS 06-0535, 23 Feb 2006. Report contains color. 14. ABSTRACT This report summarizes programming techniques ...that aid multidisciplinary design programmers in developing computational designs that measure AFRL technology effectiveness. These techniques have...underlying principles of the AVEC environment. This paper describes a number of software techniques already established in AVEC that will help aerospace

  13. The structure of the FnI-EGF-like tandem domain of coagulation factor XII solved using SIRAS

    PubMed Central

    Beringer, D. X.; Kroon-Batenburg, L. M. J.

    2013-01-01

    Coagulation factor XII (FXII) is a key protein in the intrinsic coagulation and kallikrein–kinin pathways. It has been found that negative surfaces and amyloids, such as Aβ fibrils, can activate FXII. Additionally, it has been suggested that FXII simulates cells and that it plays an important role in thrombosis. To date, no structural data on FXII have been deposited, which makes it difficult to support any hypothesis on the mechanism of FXII function. The crystal structure of the FnI-EGF-like tandem domain of FXII presented here was solved using experimental phases. To determine the phases, a SIRAS approach was used with a native and a holmium chloride-soaked data set. The holmium cluster was coordinated by the C-terminal tails of two symmetry-related molecules. Another observation was that the FnI domain was much more ordered than the EGF-like domain owing to crystal packing. Furthermore, the structure shows the same domain orientation as the homologous FnI-EGF-like tandem domain of tPA. The plausibility of several proposed inter­actions of these domains of FXII is discussed. Based on this FXII FnI-EGF-like structure, it could be possible that FXII binding to amyloid and negatively charged surfaces is mediated via this part of FXII. PMID:23385745

  14. Structure of human uridine-cytidine kinase 2 determined by SIRAS using a rotating-anode X-ray generator and a single samarium derivative.

    PubMed

    Appleby, Todd C; Larson, Gary; Cheney, I Wayne; Walker, Heli; Wu, Jim Z; Zhong, Weidong; Hong, Zhi; Yao, Nanhua

    2005-03-01

    Uridine-cytidine nucleoside kinase 2 (UCK2) is the rate-limiting enzyme in the pyrimidine-nucleotide salvage pathway. UCK2 catalyzes the phosphorylation of the natural ribonucleosides cytidine and uridine to cytidine 5'-monophosphate (CMP) and uridine 5'-monophosphate (UMP), respectively, and activates several important frontline antimetabolite drugs. The present contribution reports the rapid crystal structure determination of human UCK2 complexed with a magnesium ion and the reaction products adenosine 5'-diphosphate (ADP) and CMP. Diffraction data were collected on a copper rotating-anode X-ray generator from one native UCK2 crystal and a single samarium-derivative crystal. Utilizing the relatively high anomalous signal from the samarium derivative at the Cu Kalpha wavelength, the structure was determined by single isomorphous replacement and single anomalous signal (SIRAS) phasing techniques. Two of the four major samarium sites are located in the active sites of the two UCK2 molecules that form the asymmetric unit and appear to displace the magnesium ions present in the native crystals. The crystal structures of UCK2 alone and in complex with various ligands have recently been determined using traditional multiple isomorphous replacement (MIR) phasing techniques and data from three heavy-atom derivatives. The reported structures validate our independently determined structure. Of more than 1000 kinase crystal structure entries in the Protein Data Bank, less than 1% of them have been determined by SIRAS. For the published kinase crystal structures determined by SIRAS, all data were reportedly collected at various synchrotron-radiation facilities. This study demonstrates that diffraction data collected from a single samarium derivative using Cu Kalpha radiation provides sufficient phasing power to determine a novel macromolecular crystal structure.

  15. SIR-A imagery in geologic studies of the Sierra Madre Oriental, northeastern Mexico. Part 1 (Regional stratigraphy): The use of morphostratigraphic units in remote sensing mapping

    NASA Technical Reports Server (NTRS)

    Longoria, J. F.; Jimenez, O. H.

    1985-01-01

    SIR-A imaging was used in geological studies of sedimentary terrains in the Sierra Madre Oriental, northeastern Mexico. Geological features such as regional strike and dip, bedding, folding and faulting were readily detected on the image. The recognition of morphostructural units in the imagery, coupled with field verification, enabled geological mapping of the region at the scale of 1:250 000. Structural profiling lead to the elaboration of a morphostructural map allowing the recognition of an echelon folds and field trends which were used to postulate the ectonic setting of the region.

  16. Crystallization, X-ray diffraction analysis and SIRAS/molecular-replacenent phasing of three crystal forms of Anabaena sensory rhodopsin transducer

    SciTech Connect

    Vogeley, Lutz; Luecke, Hartmut

    2006-04-01

    Crystals of Anabaena sensory rhodopsin transducer, the transducer for the cyanobacterial photosensor Anabaena sensory rhodopsin, obtained in the space groups P4, C2 and P2{sub 1}2{sub 1}2{sub 1} diffract to 1.8, 2.1 and 2.0 Å, respectively. Phases for these crystal forms were obtained by SIRAS phasing using an iodide quick-soak derivative (P4) and molecular replacement (C2 and P2{sub 1}2{sub 1}2{sub 1}). Anabaena sensory rhodopsin transducer (ASRT) is a 14.7 kDa soluble signaling protein associated with the membrane-embedded light receptor Anabaena sensory rhodopsin (ASR) from Anabaena sp., a freshwater cyanobacterium. Crystals of ASRT were obtained in three different space groups, P4, C2 and P2{sub 1}2{sub 1}2{sub 1}, which diffract to 1.8, 2.1 and 2.0 Å, respectively. Phases for one of these crystal forms (P4) were obtained by SIRAS phasing using an iodide quick-soak derivative and a partial model was built. Phases for the remaining crystal forms were obtained by molecular replacement using the partial model from the P4 crystal form.

  17. Shuttle imaging radar-A (SIR-A) data analysis. [geology of the Ozark Plateau of southern Missouri, land use in western Illinois, and vegetation types at Koonamore Station, Australia

    NASA Technical Reports Server (NTRS)

    Arvidson, R. E.

    1983-01-01

    The utility of shuttle imaging radar (SIR-A) data was evaluated in several geological and environmental contexts. For the Ozark Plateau of southern Missouri, SIR-A data were of little use in mapping structural features, because of generally uniform returns. For western Illinois, little was to be gained in terms of identifying land use categories by examining differences between overlapping passes. For southern Australia (Koonamore Station), information ion vegetation types that was not obtainable from LANDSAT MSS data alone was obtained. Specifically, high SIR-A returns in the Australian site were found to correlate with locations where shrubs increase surface roughness appreciably. The Australian study site results demonstrate the synergy of acquiring spectral reflectance and radar data over the same location and time. Such data are especially important in that region, since grazing animals have substantially altered and are continuing to alter the distribution of shrublands, grasslands, and soil exposures. Periodic, synoptic acquisition of MSS and SAR data would be of use in monitoring the dynamics of land-cover change in this environment.

  18. Le Soleil et ses relations avec la Terre

    NASA Astrophysics Data System (ADS)

    Lang, Kenneth; Heidmann, M.

    C'est le 2e livre de K. Lang publié en français, considéré comme texte complementaire au célèbre Vagabonds de l'Espace qui avait gagné en 1994 le prix du livre d'astronomie en France. Maintenant l'auteur se concentre sur le système le plus élémentaire: l'étoile et son planète, et choisit celui qui est le plus intéressant pour nous: le Soleil et la Terre. Il a accumulé les observations terrestres et les plus récentes effectuées par des observatoires spatiales, et ceux des météorologues et géophysiciens, et nous présente un panorama fascinant du Soleil et ses relations avec la Terre. C'est la physique qui a les conséquences les plus fondamentales aux événements qui influencent notre environment, notre vie et même la condition humaine y inclu les arts et la litérature.

  19. SIRA: TREC Session Track 2014

    DTIC Science & Technology

    2014-11-01

    different approaches in three separate runs for their participation in the 2013 Session Track. Their first run involved a simple retrieval system, their...should be wrapped around said words. Specifically, our system extracted nouns , verbs, adverbs, and adjectives and finds the highest frequency...task, we decided to use just the general frame consisting of nouns , verbs, people, locations, and organizations recognized in the text. The system

  20. Shuttle imaging radar experiment

    USGS Publications Warehouse

    Elachi, C.; Brown, W.E.; Cimino, J.B.; Dixon, T.; Evans, D.L.; Ford, J.P.; Saunders, R.S.; Breed, C.; Masursky, H.; McCauley, J.F.; Schaber, G.; Dellwig, L.; England, A.; MacDonald, H.; Martin-Kaye, P.; Sabins, F.

    1982-01-01

    The shuttle imaging radar (SIR-A) acquired images of a variety of the earth's geologic areas covering about 10 million square kilometers. Structural and geomorphic features such as faults, folds, outcrops, and dunes are clearly visible in both tropical and arid regions. The combination of SIR-A and Seasat images provides additional information about the surface physical properties: topography and roughness. Ocean features were also observed, including large internal waves in the Andaman Sea. Copyright ?? 1982 AAAS.

  1. Algorithm-supported visual error correction (AVEC) of heart rate measurements in dogs, Canis lupus familiaris.

    PubMed

    Schöberl, Iris; Kortekaas, Kim; Schöberl, Franz F; Kotrschal, Kurt

    2015-12-01

    Dog heart rate (HR) is characterized by a respiratory sinus arrhythmia, and therefore makes an automatic algorithm for error correction of HR measurements hard to apply. Here, we present a new method of error correction for HR data collected with the Polar system, including (1) visual inspection of the data, (2) a standardized way to decide with the aid of an algorithm whether or not a value is an outlier (i.e., "error"), and (3) the subsequent removal of this error from the data set. We applied our new error correction method to the HR data of 24 dogs and compared the uncorrected and corrected data, as well as the algorithm-supported visual error correction (AVEC) with the Polar error correction. The results showed that fewer values were identified as errors after AVEC than after the Polar error correction (p < .001). After AVEC, the HR standard deviation and variability (HRV; i.e., RMSSD, pNN50, and SDNN) were significantly greater than after correction by the Polar tool (all p < .001). Furthermore, the HR data strings with deleted values seemed to be closer to the original data than were those with inserted means. We concluded that our method of error correction is more suitable for dog HR and HR variability than is the customized Polar error correction, especially because AVEC decreases the likelihood of Type I errors, preserves the natural variability in HR, and does not lead to a time shift in the data.

  2. Rupture diaphragmatique droite avec passage total et isolé du foie en intra-thoracique

    PubMed Central

    Turki, Mohamed; Barhoumi, Mohamed Hafed; Hajji, Hassen; Chemchik, Heithem; M'barek, Bechir

    2011-01-01

    La rupture traumatique de la coupole diaphragmatique droite avec hernie du foie dans le thorax est une lésion rare. Elle est souvent intégrée dans le cadre d'un poly-traumatisme, dont elle est un critère de gravité. Elle expose, précocement ou tardivement, à des complications cardio-pulmonaires par compression. Le diagnostic d'une rupture diaphragmatique droite est difficile à établir. En effet, ses signes cliniques sont peu spécifiques et l'imagerie peut être prise en défaut du faite qu'elle visualise les organes ascensionnés mais plus difficilement la rupture elle-même. La voie d'abord thoracique est souvent préférée du fait des difficultés de l'exposition du diaphragme en présence du foie. Nous rapportons un cas d'une rupture diaphragmatique droite avec passage isolé et total du foie en intra-thoracique diagnostiquée au cinquième jour d'hospitalisation chez un polytraumatisé. PMID:22187610

  3. Elaboration de revetements nanocomposites avec des proprietes superhydrophobes, semi-conductrices et photocatalytiques

    NASA Astrophysics Data System (ADS)

    Madidi, Fatima Zahra

    Les lignes aeriennes de transport et de distribution de l'energie electrique sont souvent exposees a diverses contraintes. Parmi celles-ci, la pollution des isolateurs constitue l'un des facteurs de premiere importance dans la fiabilite du transport d'energie. En effet, la presence de pollution sur les isolateurs lorsqu'elle est humidifiee entraine la diminution de leur performance electrique en favorisant l'apparition d'arcs de contournement. De telles pannes peuvent parfois causer des impacts socioeconomiques importants. Par ailleurs, le developpement de nouveaux revetements pour ces isolateurs peut s'averer un moyen efficace pour les proteger contre l'apparition de l'arc de contournement. Les revetements superhydrophobes ont fait l'objet de nombreuses etudes au cours de ces dernieres annees. Ces surfaces sont preparees en combinant une rugosite nano-microstructuree avec une faible energie de surface. En outre, de telles surfaces ont de nombreuses applications si elles sont durables et n'ont pas d'effets nocifs sur l'environnement. L'objectif principal de la presente etude vise d'abord l'elaboration de revetements superhydrophobes, puis l'etude de leur duree de vie, leurs proprietes dielectriques et photocatalytiques. Une grande variete de materiaux a faible energie de surface peuvent etre utilises pour le developpement de ces revetements. Dans cette recherche, le caoutchouc de silicone (CS) est employe car il presente de nombreuses proprietes, notamment une forte hydrophobie, une resistance aux rayonnements ultraviolets, et une bonne tenue au feu sans degagement de produits toxiques. Toutefois, le point faible de ces materiaux est la degradation de leurs proprietes hydrophobes. Afin d'ameliorer certaines proprietes du caoutchouc de silicone, des nanoparticules seront additionnees au polymere de base. La technique d'elaboration des revetements consiste a ajouter des nanoparticules de dioxyde de titane (TiO2) au polymere de base, par des methodes ayant un

  4. Reconnaissance Invariante des Formes avec le Filtre de Fourier-Mellin et un Reseau Neuronique

    NASA Astrophysics Data System (ADS)

    Lejeune, Claude

    Le filtre de Fourier-Mellin est applique a un ensemble d'objets pour generer des vecteurs invariants sous translation, rotation et changement d'echelle. C'est la premiere methode permettant d'obtenir ces trois invariants simultanement. Le calcul des vecteurs invariants est fait numeriquement et optiquement. Les vecteurs ainsi obtenus sont utilises comme entrees dans un reseau neuronique backpropagation pour faire la classification des prototypes qui lui sont presentes. Les dimensions des vecteurs invariants sont tres petites par rapport aux objets d'entree et permettent d'utiliser un reseau possedant un nombre restreint de connexions. Il devient possible d'entrai ner le reseau dans des temps relativement courts sur un ordinateur du type PC. Une fois le reseau entrai ne, nous lui presentons des vecteurs invariants provenant d'objets se retrouvant dans l'ensemble d'entrai nement mais ayant subi des rotations et des changements d'echelle. Ce nouveau groupe represente l'ensemble de rappel. La performance de la methode est tres bonne avec des taux de succes superieurs a 85%.

  5. Association de neuroleptiques atypiques avec les anticonvulsivants et syndrome malin (à propos de deux cas)

    PubMed Central

    Nabih, Fadoua Oueriagli; Benali, Abdeslam; adali, Imane; Manoudi, Fatiha; Asri, Fatima

    2014-01-01

    Le syndrome malin des neuroleptiques (SMN) est une complication rare mais grave du traitement par les neuroleptiques, pouvant engager le pronostic vital. Les auteurs rapportent deux observations, la première d'une jeune patiente de 18 ans, suivie pour une épilepsie partielle temporale, sous carbamazépine (800mg/jour) depuis 13 ans, et qui a développé un SMN après introduction d'amisulpride (600 mg/jour). La deuxième observation d'un jeune patient de 28 ans sous valproate sodium (750mg/jour) depuis 10 ans et qui a présenté un SMN après association d'olanzapine (20mg/jour). Les cliniciens doivent être vigilants par rapport au risque d'induction d'un SMN après introduction de neuroleptiques atypiques chez des patients traités pendant une longue durée avec des anticonvulsivants. PMID:25422695

  6. Pneumopathie grave avec atteinte bronchique compliquant une varicelle chez un adulte immunocompétent

    PubMed Central

    Serghini, Issam; Chkoura, Khalid; Hjira, Nawfal; Zoubir, Mohamed; Lalaoui; Boughalem, Mohamed

    2014-01-01

    La varicelle est une infection virale cosmopolite, très contagieuse, due au virus varicelle-zona (VZV) et caractérisée par de la fièvre et une éruption papulo-vésiculeuse prurigineuse. L'incidence de la varicelle a significativement augmenté dans les dernières décennies en Europe et aux États-Unis. Chez l'enfant, la varicelle est une infection habituellement bénigne. Chez l'adulte, son évolution peut être émaillée de complications. La pneumonie varicelleuse est la plus fréquente des complications graves de la varicelle chez l'adulte, avec une incidence estimée de 16 à 33% et une mortalité pouvant atteindre 20%. Nous rapportons un cas de varicelle compliquée d'une pneumopathie hypoxémiante. L'examen endoscopique bronchique met en évidence des lésions vésiculeuses de la muqueuse bronchique. Sous traitement antiviral, l’évolution est favorable. PMID:25829973

  7. Recherche du boson de Higgs dans l'état final dimuonique et étude de l'asymétrie de production de la paire top antitop avec l'expérience DO auprès du Tevatron; Higgs boson search in the dimuonique final state and study of the top pair antitop production asymmetry with the DO experiment at the Tevatron.

    SciTech Connect

    Fauré, Alexandre

    2014-06-03

    Two high energy particle physics analyses are presented in this PhD report using events with two leptons oppositely charged and with missing transverse energy. These events are selected using 9.7 fb-1 of total pp collisions data collected with the DØ detector at the TeVatron at √s=1.96 TeV.The first analysis is the research of the Higgs boson decaying in the H→WW→μνμν channel. No significant excess above the background prediction is observed.Upper limits on Higgs boson production cross-section are computed in the standard model framework but also in the 4th generation of fermions and in the fermiophobic coupling to Higgs boson hypotheses. In order to validate the research methodology, the W boson pair production cross-section is measured.The second analysis is the measurement of the forward-backward asymmetry of the tt pair production. This is the first measurement in the dileptonic channel at DØ experiment. In this context, a new tt pair kinematic reconstruction is used (matrix element method) to give a raw measurement of the forward-backward asymmetry. Thanks to a dedicated calibration method, we give a final measurement of AFB=18.0 ± 6.0 (stat) ± 3.3 (syst).

  8. L’identification et traitement du trouble panique avec ou sans agoraphobie

    PubMed Central

    Foldes-Busque, Guillaume; Marchand, André; Landry, Pierre

    2007-01-01

    RÉSUMÉ OBJECTIF Renseigner les médecins de première ligne au sujet de l’identification précoce, du diagnostic et du traitement du trouble panique avec ou sans agoraphobie (TP/A). QUALITÉ DES DONNÉES Les données et recommandations présentées proviennent d’une recension des écrits scientifiques réalisée via les banques de données PsycLIT, PsyINFO et MEDLINE (1985 à 2006) en utilisant les descripteurs panic disorder, psychotherapy, psychosocial treatment, treatment et pharmacotherapy. Les recommandations formulées par les auteurs s’appuient sur des données probantes provenant d’études d’excellente qualité. Les informations concernant le diagnostic et l’évaluation du TP/A proviennent d’études épidémiologiques récentes, de consensus et d’opinions d’experts. PRINCIPAL MESSAGE Le TP/A est un trouble psychiatrique souvent rencontré en médecine de première ligne, mais il est fréquemment sous-diagnostiqué et sous-traité. L’identification précoce de ce trouble demande une attention particulière aux symptômes médicalement inexpliqués et, le cas échéant, le médecin doit utiliser des questions spécifiques permettant d’identifier d’éventuelles attaques de panique et de cerner leur signification pour le patient. Le traitement de premier choix pour ce trouble est une psychothérapie d’orientation cognitivo-comportementale administrée par un psychologue ou un psychiatre spécialisé. Si de telles ressources ne sont pas disponibles, le médecin peut opter pour un traitement psychopharmacologique. CONCLUSION Les médecins de famille peuvent jouer un rôle central dans l’identification et le traitement des patients souffrant d’un TP/A. PMID:17934032

  9. Un syndrome confusionnel révélant un syndrome de Fahr avec hyperparathyroïdie

    PubMed Central

    Rharrabti, Souad; Darouich, Ilhame; Benbrahim, Mohamed; Belahsen, Fawzi; Rammouz, Ismail; Alouane, Rachid

    2013-01-01

    Le syndrome de Fahr est une entité anatomo-clinique rare, caractérisée par des calcifications intracérébrales bilatérales et symétriques, localisées dans les noyaux gris centraux, le plus souvent associées à des troubles du métabolisme phosphocalcique. L'hypoparathyroïdie, primitive ou postopératoire, est l'anomalie la plus classique. L'hyperparathyroïdie est exceptionnellement rapportée comme cause du syndrome de Fahr. Nous rapportons le cas d'une fille de 17 ans suivie depuis l’âge de 12 ans pour une épilepsie avec la notion d'un retard mental depuis l'enfance, qui a présenté un syndrome confusionnel révélant un syndrome de Fahr avec la particularité de l'existence d'une hyperparathyroïdie. PMID:23734268

  10. Jumelage eolien-diesel avec stockage d'air comprime: Modelisation de Ia suralimentation du moteur diesel

    NASA Astrophysics Data System (ADS)

    Beaulac, Philippe

    Ce memoire est le resultat d'une recherche qui visait le developpement d'un modele de moteur diesel a I' aide d'un logiciel commercial, GT Power. Ce modele permet de tester certaines hypotheses pour optimiser la recuperation d'energie d'un systeme hybride eolien-diesel avec stockage d'air comprime. L'energie stockee sous forme d'air comprime pourrait etre utilisee afin de reduire la consommation en carburant du moteur diesel. Les resultats anticipes pourraient etre utilises dans des sites isoles du nord canadien, ou l'energie est beaucoup plus dispendieuse a rendre disponible aux consommateurs. La methodologie preconisee consistait a relever des donnees de performances sur un groupe electrogene modifie avec des capteurs, charges resistantes, interface et apport d'air comprime. Les donnees pouvaient etre utilisees afin d'ajuster le modele developpe. Une fois le modele bien ajuste, les hypotheses d'optimisation sont mises a l'essai avant de tenter de modifier le moteur physique en tant que tel. Les resultats obtenus ne sont pas aussi concluants que desires, compte tenu du bris d'un capteur de pression critique et d'echeanciers trop serres pour permettre de reprendre les essais. Par contre, les donnees colligees de la simulation du modele demontrent que le modele et done le logiciel GT Power peuvent bel et bien foumir l'outil de confirmation souhaite pour justifier des travaux de modification de concept de moteur.

  11. Un cas de fracture luxation négligée du coude avec conservation de la fonction du coude

    PubMed Central

    Lahrach, Kamal; Ammoumri, Oussama; Mezzani, Amine; Benabid, Mounir; Marzouki, Amine; Boutayeb, Fawzi

    2015-01-01

    Les fractures luxations du coude sont rares et souvent mal tolérées chez les sujets jeunes actifs. Nous rapportons un cas de fracture-luxation du coude remontant à 20 ans. C'est un jeune de 35 ans, victime il y a 20 ans d'un traumatisme fermé, suite à une chute lors d'un match du football, de son coude gauche occasionnant une fracture-luxation du coude. Le patient a refusé une intervention chirurgicale avec une auto-rééducation. L'examen a mis en évidence une conservation de la fonction du coude. Un bilan radiologique a montré une fracture luxation du coude avec remaniement de la palette humérale. Une abstention thérapeutique a été décidée devant l'ancienneté de la fracture-luxation et la gêne fonctionnelle minime engendrée. Contrairement aux autres séries, la fracture-luxation dans notre cas était bien tolérée malgré le jeune âge du patient. PMID:26113930

  12. Carcinome métaplasique du sein avec différenciation osseuse extensive: à propos d'un cas

    PubMed Central

    Benlemlih, Amal; Bendahou, Mouhcine; Znati, Kaoutar; Sekkal, Mohamed; Chahbouni, Sanae; Mahmoud, Samia; Banani, Mohamed; Afaf, Amarti

    2013-01-01

    Le carcinome métaplasique du sein est une entité rare et bien individualisé par l'OMS. Il représente moins de 1% des cancers invasifs du sein et constitue un groupe tumoral hétérogène soit purement épithélial soit à doublecontingent épithélial et mésenchymateuse. Le carcinome métaplasique avec différenciation osseuse extensive est très rare. Il représente 0.2% des carcinomes du sein. Nous rapportant un cas exceptionnel d'un carcinome métaplasique du sein avec différenciation osseuse extensive chez une patiente de 53 ans. A travers ce cas et une revue de la littérature, les caractéristiques anatomo-cliniques, radiologique, thérapeutiques et évolutives seront discutées. PMID:24570796

  13. Etude de la photosensibilite dans la silice implantee avec des ions de haute energie

    NASA Astrophysics Data System (ADS)

    Verhaegen, Marc

    La photosensibilite est la propriete par laquelle une materiau donne voit son indice de refraction changer sous l'effet d'une exposition lumineuse. Malgre le nombre croissant de dispositif base sur ce phenomene, les mecanismes a la base de la photosensibilite sont encore debattus. Nous apportons dans cette these un eclairage original sur ce sujet en etudiant la matrice de silice pure non dopee rendue photosensible par implantation d'ion de haute energie. L'implantation d'ions silicium de S MeV modifie l'indice de refraction principalement en densifiant une couche mince dont l'epaisseur est de l'ordre de quelques microns. Nos mesures montrent qu'un guide plan supportant les modes TEi et TMi (i = 0,1) est forme et que l'indice effectif du mode TE0 suit l'evolution de la densification en fonction de la dose de silicium implantee. Nous montrerons egalement que l'augmentation d'indice et la densification produites par implantation atteignent un palier pour une dose de 3 x 1014Si/cm 2, alors que la production de defauts par implantation atteint son palier pour une dose plus faible d'un ordre de grandeur soit 3 x 1013Si/cm2. Le profil d'indice longitudinal produit par l'implantation ionique est calcule a partir des mesures des indices effectifs des modes guides. Ce profil suggere que l'augmentation d'indice comprend une contribution dues collisions et une contribution dues aux pertes d'energie par ionisation. La contribution des pertes par ionisation influence significativement le profil d'indice pour des valeurs de pertes d'energie par unite de longueur (dE/dx) de l'ordre de 2 keV/nm. Lorsque la silice implantee est soumise a un rayonnement ultraviolet d'un laser a excimeres, il en resulte une diminution d'indice de refraction de l'ordre de 10-3 avec une efficacite plus grande si la longueur d'onde d'exposition est 193nm (ArF) plutot que 248nm (KrF). Deux regimes d'exposition lumineuse de la silice implantee a 193nm sont observes. Le premier regime produit une diminution

  14. Cryptographie quantique avec des états cohérents à longueur d'onde télécom

    NASA Astrophysics Data System (ADS)

    Lodewyck, J.; Tualle-Brouri, R.; Debuisschert, T.; Grangier, P.

    2006-10-01

    Nous proposons un système de distribution quantique de clé avec des variables continues, implémenté avec des technologies télécom à 1550 nm. Le dispositif actuel nous a permis de transmettre une clé secrète brute au taux de 1 Mb/s sur une distance de quelques mètres. Une extension en cours de réalisation nous permettra de transmettre des clés sur des distances allant jusqu'à plusieurs dizaines dekilomètres.

  15. Les astronomes européens auscultent les cieux avec le plus grand télescope du monde

    NASA Astrophysics Data System (ADS)

    Malbet, F.

    2008-09-01

    À l'heure des projets de télescopes extrêmement grands, l'Europe a déjà une longueur d'avance. Le télescope européen (VLT), en mode interférométrique avec l'instrument AMBER devient le plus grand télescope jamais utilisé dans le domaine optique aussi bien en surface de miroir (plus de 150 m2) qúen finesse de résolution qui atteint celle d'un télescope de 130 m de diamètre. Le journal professionnel Astronomy & Astrophysics a publié en 2007 un numéro spécial qui rapporte les premiers résultats obtenus avec l'instrument AMBER (Astronomical MultiBEam Recombiner) par le très grand télescope européen. Ces articles couvrent pratiquement tous les stades de l'évolution stellaire depuis la formation des étoiles et des planètes jusqu'a l'observation de l'explosion de type nova dans un système stellaire évolué. Ces résultats inédits ont été obtenus en utilisant simultanément 3 des 4 télescopes du VLT basés à l'Observatoire européen austral du mont Paranal au Chili. L'instrument AMBER équipant le VLTI (mode interférométrique du VLT) permet dâatteindre une résolution angulaire inégalée de l'ordre du millième de seconde d'angle autorisant l'observation des astres dans différentes longueurs d'onde, dans l'infrarouge proche. Les astronomes obtiennent donc des observations avec une finesse 13 fois plus importante que celle d'un télescope seul. Il devient alors possible de sonder les régions de formation de planètes, d'observer les vents des étoiles en rotation très rapide, d'étudier les différents types de matières éjectées par une étoile massive, de séparer les deux composantes d'une étoile double serrée et de voir en direct l'évolution d'une nova quelques jours seulement après son explosion.

  16. Hyperemesis gravidarum avec troubles ioniques sévères: à propos d'un cas

    PubMed Central

    Jarraya, Anouar; Elleuch, Sahar; Zouari, Jawhar; Trigui, Khaled; Sofiene, Abidi; Smaoui, Mohamed; Kolsi, Kamel

    2015-01-01

    L'hyperemesis gravidarum s'accompagne habituellement d'une perte de poids, d'une acétonurie et de troubles hydro-électrolytiques comme il peut également s'accompagner d'anomalies du bilan hépatique. Nous rapportons un cas de vomissements gravidiques à 10 semaines d'aménorrhée non traité et vu tardivement avec des troubles ioniques sévères associés à des répercussions cliniques dans un contexte de cytolyse, de cholestase et d'insuffisance rénale aigue. Ce cas a bien répondu au traitement médical. PMID:26161187

  17. Lipome du corps calleux: à propos d'un cas avec revue de littérature

    PubMed Central

    Zhari, Bouchra; Mattiche, Houda; Boumdine, Hassan; Amil, Touriya; Ennouali, Hassan

    2015-01-01

    Le lipome du corps calleux est une malformation congénitale très rare, qui peut être associée à des degrés divers de dysgénésie du corps calleux. Son extension dans le ventricule latéral est encore plus rare. Il est souvent asymptomatique, mais peut se présenter par une épilepsie, hémiplégie, démence ou de simples céphalées. La tomodensitométrie et l'imagerie par résonance magnétique permettent facilement le diagnostic. Nous rapportons le cas d'une jeune fille de 14 ans, souffrant de simples céphalées, chez qui on découvre un lipome du corps calleux avec extension au ventricule latéral. PMID:26526933

  18. Présentation atypique d'une granulomatose avec polyangeite: à propos d'une observation pédiatrique

    PubMed Central

    Berriche, Olfa; Younes, Samia; Ammari, Wafa; Alaya, Wafa; Kessomtini, Wassia; Hammami, Sonia

    2015-01-01

    La granulomatose avec polyangéite (GPA) est une vascularite nécrosante systémique, caractérisée par une inflammation granulomateuse, une nécrose tissulaire et une vascularite touchant les vaisseaux de moyen et, surtout, de petit calibre, elle touche rarement l'enfant. PMID:26327978

  19. Recherche De Correlations Temporelles Des Muons Cosmiques Avec Macro Et Perte D'Energie Des Nuclearites

    NASA Astrophysics Data System (ADS)

    Moussa, A.

    2009-11-01

    The first parts of the thesis recalls the main features of the large MACRO experiment at the underground Gran Sasso Laboratory. It then describes the atmospheric muons measured by the experiment and the selection criteria to obtain and analyze a large sample of cosmic muons. The time series of MACRO muons was analyzed with two complementary approaches: search for the occurrence of bursts of muon events and search for periodicities in the muon time distribution. The Scan Statistics method was used in the first case and the Lomb-Scargle spectral analysis in the second case. The two techniques complete early analyses performed with "folding" methods. It is confirmed that the seasonal variation is the dominant periodic variation, and one also confirms the solar diurnal and sidereal modulations. A separate study concerns the analysis of the energy losses of the hypothetical Nuclearites in different materials and detectors; their importance for the searches performed by the MACRO and the SLIM experiments is discussed.

  20. Silence et divulgation dans des familles d’adolescents vivant avec le VIH depuis la naissance : une exploration qualitative

    PubMed Central

    Proulx-Boucher, Karène; Blais, Martin; Fernet, Mylène; Richard, Marie-Ève; Otis, Joanne; Josy Lévy, Joseph; Samson, Johanne; Lapointe, Normand; Morin, Guylaine; Thériault, Jocelyne; Trottier, Germain

    2011-01-01

    OBJECTIF : Les études ciblant les enfants nés avec le VIH se sont principalement intéressées à la période précédant l’annonce du diagnostic à l’enfant. L’objectif de cette étude est d’explorer les dynamiques de communication intrafamiliale suivant l’annonce du diagnostic. MÉTHODOLOGIE : Vingt-neuf jeunes (de dix à 18 ans) vivant avec le VIH depuis la naissance ont accordé des entrevues individuelles semi-dirigées portant sur : 1) le dévoilement du statut sérologique, 2) leurs relations familiales et 3) l’éducation sexuelle en milieu familial. Les témoignages ont fait l’objet d’une analyse de contenu. RÉSULTATS : Les jeunes ont appris en moyenne à l’âge de 11 ans leur diagnostic VIH+. La dynamique qui s’installe après cette annonce apparaît régie par le silence : les échanges qui s’ensuivent portent en majorité sur des questions relatives à la médication et à la prévention d’une transmission sexuelle du virus. Ce silence préserverait l’équilibre familial en occupant trois fonctions : protéger la mère d’un sentiment de culpabilité à l’égard de la transmission, assurer l’harmonie familiale, se sentir normal face aux autres. Le diagnostic de l’adolescent n’est généralement pas révélé à la famille élargie, préservant ainsi leur intégration au sein de la famille en les protégeant du rejet, de la trahison et du jugement. EXPOSÉ : Les fonctions du silence et du secret occupent une place stabilisatrice importante au sein de la famille. Toutefois, elles contribuent à isoler les adolescents d’une forme de soutien affectif dont ils ont pourtant besoin. Des pistes d’intervention sont suggérées. PMID:22851894

  1. Dynamique d'un laser a colorant a pompage synchrone avec cavite couplee et applications aux ondes terahertz breves et intenses

    NASA Astrophysics Data System (ADS)

    Baribault, Robert

    Nous presentons deux methodes de generation de battements de frequences terahertz pouvant servir a illuminer des antennes photoconductrices afin d'obtenir une emission a spectre etroit et une grande plage d'accordabilite dans l'infrarouge lointain (IRL). Nous discutons des differentes applications dans l'IRL, et presentons plusieurs techniques de generation d'IRL. Parmi ces methodes, nous choisissons celle qui depend de l'illumination incidente, basee sur un deplacement de charges dans un semi-conducteur soumis a une tension a ses bornes, l'antenne photoconductrice. Nous etudions l'emission d'ondes terahertz par cette antenne photoconductrice pour quatre types d'illumination, l'impulsion ultrabreve, l'impulsion ultrabreve modelee, le pseudo-battement par decalage d'impulsions avec glissement en frequence, et le battement. Nous presentons des resultats experimentaux d'illumination d'une antenne photoconductrice en silicium sur saphir endommage par radiation (rd-SOS) avec une impulsion breve et un battement. Un accroissement de l'efficacite est demontre pour le battement. Nous simulons la dynamique d'un laser a colorant a pompage synchrone (LACPS) afin de comprendre ses conditions optimales d'utilisation. Deux LACPS, pompes par le meme laser Nd:YAG, sont synchronises temporellement et spatialement et permettent d'obtenir un battement stable par le controle des delais optiques. Les durees a mi-hauteur des impulsions des deux LACPS doivent demeurer identiques en fonction de la longueur d'onde. La section efficace d'emission du milieu de gain est critique dans la dynamique de ce laser. La duree a mi-hauteur de l'impulsion varie peu avec la section efficace d'emission. Pour controler les fluctuations dues a l'emission spontanee, on ajoute une cavite couplee qui minimise l'effet de l'emission spontanee dans la dynamique du LACPS. Nous montrons les battements obtenus avec deux LACPS, de 0.5 THz et 18 THz, dont deux, a 0.85 THz et 9.36 THz sont amplifies jusqu'a une energie

  2. Francais fonctionnel et travailleurs etrangers: Experiences d'oral avec des debutants (Functional French and Foreign Workers: Experiments in Spoken Languages with Beginners). Melanges pedagogiques.

    ERIC Educational Resources Information Center

    Pieron, C.

    Teaching functional French is discussed with instructors of groups of foreign workers in mind. It takes as its starting point two "modules" for teaching French ("the highway code at driving school" and "starting and keeping small talk going") and uses them to exemplify some of the difficulties involved in the development and classroom use of…

  3. Cancer bronchique à petites cellules et grossesse: à propos d'un cas avec revue de la literature

    PubMed Central

    Safini, Fatima; Jjouhadi, Hassan; Chehal, Asmaa; Mernissi, Farida; Wilfried, Akpoo; Bouchbika, Zineb; Taleb, Amina; Benchakroun, Nadia; Tawfiq, Nezha; Sahraoui, Souha; Benider, Abdellatif

    2016-01-01

    Le cancer broncho-pulmonaire (CBP) de la femme enceinte est une entité rare, d’évolution péjorative. Cette situation devient de plus en plus fréquente, du fait de l'augmentation du tabagisme chez la femme. La transmission tumorale trans-placentaire avec atteinte fœtale est décrite surtout chez les femmes non traitées. Le traitement est multidisciplinaire et n'est pas bien codifié. Nous rapportons le cas d'une patiente de 23 ans chez qui le diagnostic d'un carcinome bronchique à petites cellules a été fait au cours de sa grossesse. Elle avait bénéficié d'une chimiothérapie pendant la grossesse, bien tolérée. L’évaluation radiologique a objectivé une stabilisation du processus pulmonaire. Le traitement a été complété par une association radio-chimiothérapie concomitante après l'accouchement. PMID:27279957

  4. Mise au point du rheometre a cisaillement annulaire pour l'etude de rheologie d'un mastic bitumineux avec verre incorpore =

    NASA Astrophysics Data System (ADS)

    El Mansouri, Souleimane

    Dans le domaine viscoelastique lineaire (VEL, domaine des petites deformations), le comportement thermomecanique du bitume et du mastic bitumineux (melange uniforme de bitume et de fillers) a ete caracterise au Laboratoire des Chaussees et Materiaux Bitumineux (LCMB) de l'Ecole de technologie superieure (ETS) avec l'appui de nos partenaires externes : la Societe des Alcools du Quebec (SAQ) et Eco Entreprises Quebec (EEQ). Les proprietes rheologiques des bitumes et des mastics ont ete mesurees grâce a un nouvel outil d'investigation appele, Rheometre a Cisaillement Annulaire (RCA), sous differentes conditions de chargement. Cet appareil permet non seulement de solliciter des eprouvettes de tailles importantes par rapport a celles utilisees lors des essais classiques, mais aussi d'effectuer des essais en conditions quasi-homogenes, ce qui permet de donner acces a la loi de comportement des materiaux. Les essais sont realises sur une large gamme de temperatures et de frequences (de -15 °C a 45°C et de 0,03Hz a 10 Hz). Cette etude a ete menee principalement pour comparer le comportement d'un bitume avec celui d'un mastic bitumineux dans le domaine des petites deformations. neanmoins, dans une seconde perspective, on s'interesse a l'influence des fillers de verre de post-consommation sur le comportement d'un mastic a faibles niveaux de deformations en comparant l'evolution des modules complexes de cisaillements (G*) d'un mastic avec fillers de verre et un mastic avec fillers conventionnels (calcaire). Enfin, le modele analogique 2S2P1D est utilise pour simuler le comportement viscoelastique lineaire des bitumes et des mastics bitumineux testes lors de la campagne experimentale.

  5. Calcul couple fluide/structure avec ANSYS : étude numérique et expérimentale d'une plaque élastique en contact avec un fluide lourd compressible

    NASA Astrophysics Data System (ADS)

    Sigrist, J. F.; Laine, C.; Peseux, B.

    2002-12-01

    Une préoccupation constante de tout industriel est la maîtrise des marges de dimensionnement de ses structures. Le recours aux techniques de calcul scientifique permet en phase de conception détaillée un dimensionnement au plus juste des structures, tout en respectant les différentes contraintes de conception (exigences fonctionnelles, conditions d'environnement, aspects réglementaires). Une meilleure maîtrise des marges passe donc par une meilleure connaissance de l'outil de calcul (précision intrinsèque, mise en œuvre de techniques de calcul plus ou moins élaborées) et la prise en compte d'une réalité physique plus complexe (avec par exemple un couplage entre différents phénomènes physiques) pour une meilleure représentativité du calcul. Une démarche globale de recherche et développement a été mise en place au sein du Service Scientifique et Technique de l'établissement DCN de Nantes Indret pour répondre à ce besoin. Nous présentons ici un exemple d'application pour le calcul de structures en présence de fluide. Cette étude numérique et expérimentale nous permet de valider conjointement le processus de calcul en bureau d'étude et les méthodes de mesure sur site dans le domaine de l'analyse fréquentielle de structures mouillées.

  6. Les carcinomes epidermoïdes du scrotum: à propos de 7 cas avec revue de la litterature

    PubMed Central

    Halfya, Ayoub; Elmortaji, Khalid; Redouane, Rabii; fethi, Meziane; Rafik, Amine; Mohamed, Ezzoubi; Abdessamad, Chlihi

    2015-01-01

    Quoique rare le carcinome épidermoïde du scrotum a un mauvais pronostic. Les Carcinomes du scrotum induite et - liées au travail sont moins fréquentes en raison d'une meilleure hygiène, vêtements de protection, et la sensibilisation de la cancérogénicité des huiles industrielles. L’épidémie à l'HPV a induit une augmentation de l'incidence. Le traitement de dépend toujours exérèse locale de la lésion primaire. La radiothérapie a peu de bénéfice thérapeutique dans le traitement d'un carcinome épidermoïde du scrotum. La bléomycine peut être utile comme traitement adjuvant pour les maladies ilio-inguinal généralisée avant la tentative exérèse, même si cela n'a pas encore été prouvé. Entre janvier 2011 au 1er janvier 2013, 7 patients atteints de carcinome épidermoïde ont été pris en charge, Trois patients ont présenté une localisation ganglionnaire. Les sept patients ont eu un traitement chirurgical par exérèse large avec reconstruction, Deux patients ont été adressé pour chimiothérapie.2 patients ont présenté une récidive, dont un est décédé. PMID:26113906

  7. Les aspects des frottis cervico-vaginaux chez les femmes vivants avec le VIH suivies à Thiès/Sénégal et association avec le degré d'immunodépression

    PubMed Central

    Bammo, Mariama; Dioussé, Pauline; Thiam, Marietou; Diop, Madoky Maguatte; Berthe, Adama; Faye, Flugence Abdou; Diallo, Thierno Abdoul Aziz; Sarr, Fatou Seck; Dione, Haby; Toure, Papa Souleymane; Diop, Bernard Marcel; Ka, Mamadou Mortalla

    2015-01-01

    De nombreuses études ont démontré que les femmes infectées par le VIH ont un risque accru de survenue de néoplasies cervicales intra épithéliales. L'association entre les deux affections étant bidirectionnelle, l'objectif était de décrire les anomalies cervicales chez les femmes séropositives au virus de l'immunodéficience humaine (VIH), de rechercher des facteurs associés et de proposer des recommandations en termes de suivi de ces femmes. Il s'agissait d'une étude transversale, multicentrique recensant l'ensemble des frottis cervico-vaginaux (FCV) et des colposcopies des patientes infectées par le VIH entre 2012 et 2014 dans les services de dermatologie de Thiès et de Mbour. Les données étaient recueillies et analysées par le logiciel EPI Info 2012 version 3.5.4. Les tests statistiques ont été effectués avec un seuil de significativité p <0,05. Etaient inclus 125 patientes. L’âge moyen était de 38,98 ± 10.2 ans [20-77]. Il n'y avait aucun signe d'appels dans 82.4%. Le FCV était normal dans 32.8%, inflammatoire dans 44.8%. Les anomalies cytologiques concernaient 22,4% dont, ASC-H (suspicion de lésions de haut grade: 2.4%), LSIL (lésions de bas grade: 8.8%), HSIL (lésions de haut grade: 4%). Leur majorité (60.7%) avaient un taux de CD4 < 500 et étaient au stade 3 de l'OMS dans 64.3%; la biopsie montrait une dysplasie sévère chez 37.5% des patientes ayant pu réaliser cet examen. Deux patientes ont bénéficié d'un traitement curatif notamment l'exérèse chirurgicale. La survenue de dysplasies cervicales même précoces semble être associée à un stade avancé de l'infection VIH. Un dépistage et un traitement précoces sont absolument nécessaires. PMID:26834915

  8. Granulomatose avec polyangéite du sujet âgé: à propos de deux cas et revue de la literature

    PubMed Central

    Berriche, Olfa; Hammami, Sonia; ammari, Fatma Larbi; Alaya, Wafa; kessomtini, Wassia; Chebbi, Wafa

    2015-01-01

    La granulomatose avec polyangéite (GPA) est une vascularite nécrosante des vaisseaux de petit calibre. L’âge moyen d'entrée dans la GPA est entre 35 et 55 ans, les formes gériatriques sont cependant rares, Nous rapportons deux cas de GPA révélés après 60 ans, le mode de révélation était inhabituel, ophtalmologique dans le premier cas et cutané dans le deuxième cas. PMID:26175831

  9. Prediction des vibrations eoliennes d'un systeme conducteur-amortisseur avec une methode temporelle non lineaire

    NASA Astrophysics Data System (ADS)

    Langlois, Sebastien

    Les vibrations eoliennes sont la cause principale de bris de conducteurs en fatigue des lignes aeriennes de transport d'energie electrique. Ces vibrations sont dues a des detachements tourbillonnaires produits dans le sillage du conducteur. Une methode commune de reduction des vibrations est l'ajout d'amortisseurs de vibrations pres des pinces de suspension. Contrairement aux essais en ligne experimentale, la modelisation numerique permet d'evaluer rapidement et a faible cout la performance d'un amortisseur de vibration sur une portee de ligne aerienne. La technologie la plus frequemment utilisee fait appel au principe de balance d'energie (PBE) en evaluant le niveau de vibrations pour lequel la puissance injectee par le vent est egale a la puissance dissipee par le conducteur et l'amortisseur. Les methodes actuelles pour la prediction des vibrations reposent sur des hypotheses simplificatrices quant a la modelisation de l'interaction conducteur-amortisseur. Une approche prometteuse pour la prediction des vibrations est l'utilisation d'un modele numerique temporel non lineaire qui permet de mieux representer la masse, la geometrie, la rigidite et l'amortissement du systeme. L'objectif principal de ce projet de recherche est de developper un modele numerique avec integration temporelle directe d'un conducteur et d'un amortisseur en vibration permettant de reproduire le comportement dynamique du systeme pour la gamme de frequence et d'amplitude typique des vibrations eoliennes des conducteurs. Un modele par elements finis d'un conducteur seul en vibration resolu par integration temporelle directe a d'abord ete developpe en considerant une rigidite de flexion variable. Comme une rigidite de flexion constante et egale a 50% de la rigidite de flexion maximale theorique ( EImax) est jugee adequate pour la modelisation du conducteur, c'est cette valeur qui a ete utilisee pour la suite du projet. Ensuite, des modeles non-lineaires pour deux types d'amortisseur de

  10. Résection laparoscopique d'une duplication gastrique chez l'adulte: traitement avec succès pour une pathologie rare

    PubMed Central

    Toumi, Omar; Hssine, Hiba Ben; Noomen, Faouzi; Jabra, Sadok Ben; Korbi, Ibtissem; Abdelmoula, Ali; Trimech, Mayada; Mansour, Wafa Ben; Faiez, Boughanmi; Khlifa, Mohamed Ben; Rabah, Hatem; Mahmoudi, Ammar; Nasr, Mohamed; Zouari, Khadija; Saffar, Hammouda; Hamdi, Abdel Aziz

    2015-01-01

    Les duplications de l'appareil digestif sont les malformations congénitales rares qui peuvent toucher tout l'appareil digestive depuis la bouche jusqu’ à l'anus. Certaines duplications sont asymptomatiques et sont diagnostiqués dans la plupart des cas pendant l'enfance. La prise en charge de la duplication gastrique est essentiellement chirurgicale. Le traitement de choix est l'exérèse complète de la duplication gastrique. Les auteurs rapportent un cas inhabituel de duplication gastrique complètement reséquée par laparoscopie. A notre connaissance, ceci est le premier cas d'une duplication gastrique traitée avec succès par laparoscopie dans la littérature Tunisienne. La Résection laparoscopique peut être ajoutée à l'arsenal thérapeutique dans le traitement chirurgical de duplications du tube digestif. PMID:26889326

  11. Etude d'un systeme de recuperation et de stockage de chaleur pour un systeme eolien-diesel avec stockage d'air comprime

    NASA Astrophysics Data System (ADS)

    Remillon, Thibaut

    La recherche presentee dans ce memoire porte sur les systemes hybrides eolien-diesel avec stockage d'air comprime (SHEDAC) adaptes a la production d'electricite en sites isoles, et plus precisement sur l'apport d'un systeme de recuperation et de stockage de chaleur (TES) au fonctionnement de ces systemes. Le principe de fonctionnement est le suivant. Quand la puissance eolienne est excedentaire par rapport aux besoins de la charge, le surplus d'energie est utilise pour comprimer de l'air. De ce processus resulte un rechauffement de l'air, on choisit d'extraire et de stocker la chaleur separement. Lors de la phase de restitution d'energie, l'air comprime utilise pour suralimenter le moteur thermique est rechauffe en utili sant la chaleur stockee precedemment. Tout au long de l'etude, nous avons seulement pris en compte la chaleur provenant du processus de compression de l'air, et neglige en tous points du systeme les echanges de chaleur avec le milieu exterieur. Pour quantifier l'apport du systeme de stockage de chaleur, nous avons tout d'abord mene une etude bibliographique sur ces systemes, pour identifier les meilleures solutions disponibles. Ensuite, on a modelise une de ces solutions sous Simulink pour etudier son fonctionnement de maniere plus precise. D'autre part, on a modelise un systeme de stockage de chaleur ideal pour quantifier l'apport maximal d'un TES sur les performances du SHEDAC. Nous avons conclu que les TES les plus adaptes aux systemes SHEDAC etaient les solutions actives directes a deux reservoirs, et que, pour beneficier au maximum du systeme de stockage de chaleur, il etait interessant de realiser la detente de l'air comprime stocke dans un moteur a air comprime, pour maximiser la recuperation d'energie mecanique.

  12. Diagnostic tardif d'une hyperoxalurie primitive au stade d'insuffisance rénale chronique terminale avec hypoparathyroïdie sévère

    PubMed Central

    El Ghali, Zineb; Lahcen, Zineb Ait; Fadili, Wafaa; Kaitouni, Abderrahim Idrissi; Hakkou, Mohamed; Hamdaoui, Abderrachid; Laouad, Inass

    2014-01-01

    L'hyperoxalurie primitive est une anomalie métabolique congénitale rare caractérisée par un excès de production avec accumulation d'oxalate secondaire à un déficit enzymatique hépatique. Nous rapportons le cas d'un patient de 18 ans qui avait comme antécédent des lithiases rénales récidivantes depuis l'enfance évoluant vers l'insuffisance rénale chronique terminale, mis en hémodialyse périodique depuis 4 ans avec apparition d'une anémie résistante à l’érythropoïétine pour laquelle il a été multitransfusé et qui était admis pour prise en charge de douleurs osseuses invalidantes d'aggravation progressive associées à un syndrome tumoral fait d'adénopathies périphériques et de splénomégalie avec dyspnée et altération de l’état général. Le bilan réalisé avait objectivé de multiples images lytiques lacunaires et condensantes au niveau des poignets et des mains avec des petits reins calcifiés, une pleurésie avec péricardite de grande abondance drainée, une ascite de moyenne abondance avec splénomégalie homogène, une anémie normochrome normocytaire à 7.2 g/dl avec hyperferritinémie à 1129 μg/l et un syndrome inflammatoire biologique. La calcémie était spontanément normale à 97 mg/l avec hyperphosphorémie à 83 mg/l et hypoparathyroïdie à 74,85 pg/ml. Les PAL étaient à 136 UI/l, l'aluminium sérique à 13μg/l et la Vitamine D native à 20,87ng/ml. Le diagnostic d'hyperoxalurie a été retenu sur les données de la biopsie ostéomédullaire objectivant des dépôts de cristaux d'oxalate de calcium avec fibrose médullaire et réaction macrophagique à corps étranger. L’évolution a été marquée par la survenue de fractures spontanées récidivantes au niveau de l’épaule et des 2 hanches. PMID:25328593

  13. Accouchées avec statut sérologique VIH inconnu à Lubumbashi, RD Congo: proportion et déterminants

    PubMed Central

    Nkoy, Albert Mwembo-Tambwe A; Kayamba, Prosper Kalenga Muenze; Donnen, Philippe; Mukalenge, Faustin Chenge; Humblet, Perrine; Dramaix, Michèle; Buekens, Pierre

    2012-01-01

    Introduction Beaucoup d'enfants vivant avec le VIH ont été infectés par leurs mères. Pour prévenir la transmission verticale les femmes doivent d'abord connaître leur statut sérologique VIH.L'objectif de cette étude était de déterminer la proportion de statut VIH inconnu à la naissance et d'identifier les facteurs associés. Méthodes C'est une étude transversale réalisée dans 10 structures sanitaires de Lubumbashi de Juin à Septembre 2010. La taille de l’échantillon était de 602 accouchées. Les statistiques descriptives usuelles et la régression logistique ont été utilisées. Résultats Parmi les accouchées, 52,5% ignoraient leur statut sérologique. Parmi elles, 62,9% accepteraient de faire le test VIH à la maternité. La proportion des femmes avec un statut sérologique VIH inconnu était significativement plus élevée chez celles qui n'avaient pas suivi de CPN (Odds Ratio ajusté (ORa) = 5,8; Intervalle de Confiance (IC) 95%: 1,7-19,8); chez celles qui avaient un bas niveau d'instruction (ORa = 1,5; IC 95%: 1,1-2,1) et chez celles qui ne savaient pas que la transmission verticale du VIH pouvaient se faire au moment de l'accouchement (ORa = 1,5; IC 95%: 1,0-2,4). Conclusion La proportion de femmes qui accouchent sans connaître leur statut sérologique au VIH est encore importante, malgré le fait que le dépistage du VIH soit proposé lors des CPN. Dans les zones à haute séroprévalence de VIH, aucune femme ne devrait accoucher sans être dépistée au VIH. Ce serait une opportunité manquée. PMID:22891083

  14. Cas rare d’un rhabdomyosarcome du col: à propos d’un cas avec revue de la littérature

    PubMed Central

    Samlali, Hamza; Jouhadi, Hassan; Attar, Hicham; Sahraoui, Souha; Benider, Abdellatif

    2016-01-01

    Le rhabdomyosarcome du col utérin fait partie des types histologiques rares des cancers du col, qu'on observe généralement chez la jeune fille ou la femme en période d'activité générale. La stratégie thérapeutique se base sur l'association des trois modalités thérapeutiques (chimiothérapie-radiothérapie-chirurgie) vu l'agressivité de la maladie. Nous rapporterons ainsi un cas de rhabdomyosarcome du col utérin chez une fille de 20 ans. Il s'agit d'une patiente âgée de 20 ans, rapportant comme antécédents pathologique particulier la notion d'infection génitale à répétition. Le premier signe rapporté était des métrorragies abondantes avec à l'examen la présence d'une masse cervicale en grappe de raisin. La biopsie était en faveur d'un rhabdomyosarcome du col. Le bilan d'extension montrait une masse localement avancée sans métastase. La patiente a reçu 5 cures de VAC avec une régression du processus tumoral de 90%. Patiente fut opérée et a bénéficié d'une hystérectomie sans conservation des annexes. Puis elle a bénéficié d'une radiothérapie postopératoire sur le pelvis. Le recul était de 13 mois, la patiente est toujours en rémission complète. Le RMS du col utérin est une tumeur rare qui survit essentiellement chez la jeune fille. L'extension est surtout locorégionale. Le traitement consiste en un geste chirurgical allant d'un éventuel traitement conservateur jusqu'au traitement radical associé à une chimiothérapie péri-opératoire. La place de la radiothérapie demeure imprécise. PMID:28292128

  15. Une étude rétrospective sur le cancer de l'ovaire avec un recul médian de 42 mois

    PubMed Central

    Raherinantenaina, Fanomezantsoa; Rakotomena, Solonirina Davidà; Hasiniatsy, Nomeharisoa Rodrigue Emile; Rakototiana, Felantsoa Auberlin; Rafaramino, Florine; Ratsimba, Hery Nirina Rakoto

    2015-01-01

    Le cancer de l'ovaire est relativement fréquent mais grave et de mauvais pronostic. Le but de cette étude était de mettre en évidence les aspects épidémiologique, diagnostique, thérapeutique et évolutif de cette pathologie maligne prise en charge dans un pays en développement. Il s'agit d'une étude rétrospective et descriptive de 10 ans (2000- 2009) effectuée dans un CHU de chirurgie générale et d'Oncologie sur 62 patientes ayant développé un cancer de l'ovaire et opérées à visée curative. L’âge moyen des patientes était de 43 ans dont 53,23% avaient plus de 45 ans. Le dosage sanguin du CA-125 était positif chez 10 patientes sur 12. Les tumeurs étaient découvertes à l’échographie dans 87,10% des cas et à la laparotomie dans 12,90%. L'hystérectomie totale avec annexectomie bilatérale était l'intervention la plus pratiquée (64,52%). Les suites opératoires précoces étaient simples. Dix patientes étaient opérées de second regard (16,13%) pour des récidives locorégionales. Les tumeurs épithéliales étaient le type histologique le plus fréquent (93,55%) dont 79% au stade avancé (Ic-IV) et 21% au stade précoce (Ia-Ib). La chimiothérapie adjuvante était administrée chez 22,60% des patientes. Avec un recul médian de 42 mois, 29 patientes étaient perdues de vue. L’évolution était favorable dans 27,42% et dans 25,81% les décès se sont survenus en postopératoire tardif. Le cancer de l'ovaire n’était pas fréquent mais grave compte tenu des stades avancés et du taux élevé des décès postopératoires tardifs qui étaient largement observés chez les patientes privées d'une chimiothérapie adéquate. PMID:26113942

  16. Récidive d'un tératome immature de l'ovaire avec gliomatose péritonéale

    PubMed Central

    Boufettal, Houssine; Samouh, Naïma

    2015-01-01

    Le tératome immature est une tumeur germinale non séminomateuse très rare, dont l’évolution est variable dans les différents cas publiés (récidive, maturation, dégénérescence). Nous rapportons un cas de récidive d'un tératome immature de l'ovaire sous forme d'un tératome mature, après traitement chirurgical conservateur et chimiothérapie. Il s'agit d'une patiente âgée de 25 ans, qui était opérée pour un tératome immature de l'ovaire avec gliomatose péritonéale par une annexectomie droite et des biopsies des granulations péritonéales ainsi qu'une chimiothérapie adjuvante, à base de BEP comprenant bléomycine, étoposide et un sel de platine (cisplatinum). Une rechute était notée 18 mois après le traitement sous forme d'un tératome mature de l'ovaire gauche. Avec un recule de 36 mois, aucune récidive n’était notée. La surveillance des tératomes ovariens associés à une gliomatose péritonéale doit être rapprochée et prolongée. En effet, les tératomes matures peuvent dégénérer ou récidiver. Les tératomes immatures peuvent récidiver au niveau de l'ovaire controlatéral sous forme mature ou immature. Les implants peuvent subir une régression fibreuse ou, exceptionnellement, dégénérer vers une glioblastomatose, de mauvais pronostic. L’échographie pelvienne couplée au doppler reste l'examen de choix pour les masses annexielles. Elle doit être répétée au moindre doute, et complétée par la tomodensitométrie chez ces patientes. PMID:26090012

  17. Jumeaux conjoints au niveau d’une omphalocèle commune avec extrophie cloacale et ambigüité sexuelle

    PubMed Central

    Boujoual, Majdouline; Madani, Hamid; Benhaddou, Housain; Belahcen, Mohamed

    2014-01-01

    Les jumeaux conjoints sont considérés comme étant une complication rare et grave des grossesses monozygotes. Le diagnostic anténatal permet de définir avec précision les structures communes, de rechercher une anomalie congénitale associée, d'organiser l´accouchement et la prise en charge néonatale. Nous présentons un cas rare de jumeaux conjoints dont la fusion se situait au niveau d'une omphalocèle commune associée à une extrophie cloacale, ambiguïté sexuelle et pieds bots. Le diagnostic a été méconnu pendant la grossesse, ce qui a engendré une dystocie lors de l'accouchement. L'issue a été fatale malgré une tentative de séparation et des mesures de réanimation. Ce cas illustre la difficulté liée d'une part à la méconnaissance du diagnostic, d'autre part au caractère urgent de la césarienne et de la séparation chirurgicale. PMID:25170387

  18. Le méningiome du sinus maxillaire: à propos d'un cas avec revue de la littérature

    PubMed Central

    Mezouri, Imane; Bellefqih, Sara; Chenna, Hanane; El Kacemi, Hanan; Kebdani, Tayeb; Benjaafar, Noureddine

    2014-01-01

    Les méningiomes extracrâniens sont rares, leur localisation au niveau du sinus maxillaire est exceptionnelle. Nous rapportons le cas d'une patiente âgée de 41 ans, ayant présenté une exophtalmie avec des céphalées intermittentes évoluant depuis 8 ans. Le diagnostic a été retenu à partir de la biopsie et du scanner cérébral et du massif facial. Le traitement a consisté en une irradiation exclusive à la dose de 54 Gray (Gy). La patiente est restée en bon contrôle locorégional, après un recul de 18 mois. A travers ce cas clinique on a démontré que le sinus maxillaire peut être touché par le méningiome, et qu'il doit être inclus dans le diagnostic différentiel des tumeurs des tissus mous. PMID:25419275

  19. La valgisation tibiale par addition d'ouverture interne avec comblement cimenté dans la gonarthrose fémorotibiale médiale sur 38 genu-varum

    PubMed Central

    Mahraoui, Mohamed Amine; Abouchane, Merouane; El Andaloussi, Yassir; Haddoun, Ahmed Reda; Nechad, Mohamed

    2015-01-01

    Le genu varum sur gonarthrose fémorotibiale interne est une pathologie en nette recrudescence dans notre pays, affectant spécialement les femmes âgées et hautement invalidante chez l'adulte jeune; Souvent, elle pose un problème d'indication et de choix thérapeutique d'ordre multifactoriel. L'ostéotomie tibiale de valgisation par ouverture interne est une technique de référence, bien connue depuis longtemps et d'efficacité validée à court, moyen et long terme, et constitue un outil thérapeutique de choix et d'apport marqué, notamment pour les sujets jeunes actifs avec gonarthrose débutante. Par ailleurs, cette technique peut voir ses indications s’élargir au dépend de l’âge et du stade évolutif. Le but de notre travail est d’évaluer les résultats anatomiques et fonctionnels de notre technique d'ostéotomie tibiale de valgisation avec comblement cimenté chez l'adulte jeune de plus de 40 ans et de préciser les facteurs pronostiques qui régissent ces résultats. Ce travail propose à travers une étude rétrospectivement menée à propos de 38 genoux opérés chez 28 patients de dresser un bilan épidémiologique, clinique, et radiologique afin d’évaluer les résultats anatomiques et fonctionnels immédiats et à distance avec un recul minimum de 2 ans, de l'ostéotomie tibiale de valgisation avec comblement cimenté. Les 28 cas ont été revus à un recul moyen de 3,7 ans avec des extrêmes entre 2 et 9 ans, l’âge moyen de nos malades était de 52 ans avec des extrêmes de 40 à 67 ans, le sexe féminin était prédominant (64%). Le genu varum était primitif dans 20 cas (71,4%), et secondaire dans 8 cas (28,5%). Les stades I et II d'Ahlback constituaient la majorité des cas de l'arthrose fémoro-tibiale (94,7%). La déviation angulaire globale moyenne était de 11,3° avec des extrêmes de 8,5° à 18°. Les résultats évalués selon le protocole du groupe Guépar étaient excellents et très bons dans 86% des cas, et moyens et

  20. Design, Implementation and Execution Results for Simulations and C2 Information Systems Connectivity Experiments (SINCE). Experiment 2

    DTIC Science & Technology

    2006-11-01

    are able to observe the enemy entities. SAUs that arrive at the eXecution Monitoring Mediator (XM2) are aggregated and delayed so as not to...Faust (FST) and HEROS (HRS). The German Army Modeling and Simulations (MS) systems (MSDE) included PABST and SIRA . The US Army MS system (MSUS...of fire interaction. From a networking point of view, we observed that having separate nets bridged by gateways for M&S, for National C2 data

  1. Stabilisation dynamique d'un winging scapula (à propos d'un cas avec revue de la littérature)

    PubMed Central

    Boukhris, Jalal; Boussouga, Mostapha; Jaafar, Abdelouahab; Bouslmame, Nabil

    2014-01-01

    Décrit pour la première fois par Velpeau en 1937, le winging scapula reste une affection rare, encore peu connue aussi bien du grand public que des professionnels de santé. Il s'agit en fait de la paralysie isolée du nerf thoracique long, responsable de l'innervation unique du muscle serratus antérieur, laquelle paralysie génère un décollement du bord spinal et de la pointe de l'omoplate, particulièrement visible lors des mouvements d'abduction et d'antépulsion du bras. Evoluant habituellement vers la récupération spontanée, le diagnostic de cette affection est essentiellement clinique, l'exploration électromyographique, peut appuyer le diagnostic et surtout servir d’élément de surveillance. Le traitement est avant tout conservateur; la chirurgie n’étant envisagée que dans les formes chroniques qui ne répondent pas à la rééducation, le cas d'ailleurs de notre patient. Le choix du type d'intervention devra obéir à des critères précis. La stabilisation dynamique de la scapula est une intervention séduisante et donne entre des mains entraînées des résultats très satisfaisants, beaucoup de critiques sont faites sur la récupération de la force musculaire, ce qui en limite l'indication quand les exigences professionnelles des patients sont importantes. Néanmoins, certaines séries en font la méthode de choix avec des résultats excellents. PMID:25918571

  2. Video-enhanced contrast, differential interference contrast (AVEC-DIC) microscopy: a new method capable of analyzing microtubule-related motility in the reticulopodial network of Allogromia laticollaris.

    PubMed

    Allen, R D; Allen, N S; Travis, J L

    1981-01-01

    A new method called Allen Video-enhanced Contrast, Differential Interference Contrast (AVEC-DIC) microscopy is shown to be sufficiently sensitive to detect several new features of microtubule-related motility in the reticulopodial network of the foraminifer, Allogromia. The method takes advantage of the variable gain and offset features of a binary video camera to operate the DIC microscope under conditions highly favorable for video imaging, but in which the optical image is virtually invisible to the eye yet retains its full information when viewed by a suitable video camera. The improvements are made possible by setting a dé Senarmont compensator to lambda/9-lambda/4 at maximal working aperture of internally corrected planapochromatic objectives. Under these conditions, the offset feature of the video camera can reject so much stray light from the instrument and specimen that contrast compares favorably with that observed in high-extinction images, and polarizing rectifiers offer scarcely any advantage. Freed from the constraints of the light-limited conditions of DIC microscopy, video images can be recorded 60 times per second, or over 1,000 times the rate of photomicrographs at comparable magnifications under high-extinction conditions. Application of this method to the reticulopodial network of Allogromia has shown that cytoplasmic organelles are translocated only in contact with single microtubules or bundles of microtubules, and that these organelles fail to move when separated from microtubules. Microtubules themselves undergo both axial translatory ("sliding") and lateral "zipping and unzipping" movements that have been suggested to occur during mitosis and other biological processes.

  3. Place du traitement chirurgical sous circulation extracorporelle à cœur battant dans les cancers du rein avec envahissement cave supra-diaphragmatique: à propos de sept cas

    PubMed Central

    Lahyani, Mounir; Karmouni, Tarik; Elkhader, Khalid; Koutani, Abdellatif; Andaloussi, Ahmed Ibn Attya

    2014-01-01

    Ce travail vise à analyser les résultats de la néphrectomie avec thrombectomie atrio-cave sous circulation extracorporelle (CEC) chez sept patients ayant un cancer du rein avec envahissement cave supra-diaphragmatique et de discuter les indications opératoires. Sept patients, six hommes et une femme dont l’âge varie entre 46ans et 65ans, ont été opérés d'un cancer du rein avec extension atrio-cave. L’écho-doppler a toujours permis la mise en évidence de l'extension veineuse mais la limite supérieure du thrombus était formellement identifiée par l'examen tomodensitométrique quatre fois, et par la résonance magnétique nucléaire dans tous les cas. Tous les patients ont été opérés sous CEC à cœur battant en normothermie. Un seul décès postopératoire est survenu. La durée du séjour en réanimation a été de 4,5 jours. Cinq patients ont eu à distance une dissémination métastatique. Cinq malades ont eu une médiane de survie de 11,5 mois (de 7 à16). Un malade a subi une métastasectomie pulmonaire 6 mois après la néphrectomie. L'exérèse des thrombi atrio-caves a été facilitée par la CEC avec une mortalité et une morbidité postopératoires acceptables mais les résultats à distance ont été décevants. Cette intervention ne peut être proposée qu'aux patients n'ayant aucune extension locorégionale et générale décelable, ce qui souligne l'importance des examens morphologiques préopératoires. PMID:25995777

  4. Pontage fémoro-fémoral croisé avec tunnulisation périnéale sous-scrotale pour une infection grave du triangle de scarpa

    PubMed Central

    Mrad, Melek Ben; Miri, Rim; Kaouel, Karim; Derbel, Bilel; Tarzi, Mariem; Ghedira, Faker; Kalfat, Tawfik; Mizouni, Hbiba; Khayati, Adel

    2015-01-01

    Nous décrivons dans cet article une technique de revascularisation des patients ayant une infection de prothèse vasculaire sus-crurale au niveau dutriangle de scarpa, et qui minimise le risque d'infection récurrente du greffon. Cette technique consiste en un pontage fémoro-fémoral croisé avec un tunnel périnéal sous-cutané loin du scarpa infecté que le tunnel classique sus-pubiensous-cutané ne permet pas. Nous rapportons le cas d'un patient âgé de 52 ans, artéritique, multi-opérés, admis pour infection du scarpa droit sur un pontage fémoro-fémoral prothétique perméable, le patient a eu une explantation de ce pontage et une revascularisation par un pontage périnéal sous-scrotal veineux loin du site infectieux; l’évolution a été excellente et le pontage est encore perméable après deux ans de suivi. Le pontage fémoro-fémoral périnéal est une procédure exceptionnellement réalisée, mais qui peut constituer une vraie option thérapeutique de revascularisation chez les patients avec une infection du scarpa. PMID:26955419

  5. Stéatose hépatique aiguë gravidique avec une pyélonéphrite aiguë droite sur une grossesse gémellaire: une association très rare

    PubMed Central

    Benali, Zine el Abidine; Rachidi, Karim; Omari, Driss

    2013-01-01

    La Stéatose hépatique aiguë gravidique est une complication rare de la grossesse, et l'association avec la pyélonéphrite aiguë est encore plus rarissime survenant le plus souvent dans le troisième trimestre. Le diagnostic est affirmé par un faisceau d'argument clinique et biologique si non par l'histologie hépatique en dehors de trouble de la crase sanguine. Autrefois régulièrement mortelle, cette pathologie bénéficie actuellement d'un meilleur pronostic maternel et fœtal, du fait du diagnostic plus précoce, d'une délivrance rapide et du traitement symptomatique. Les auteurs ont jugé utile de rapporter une observation à travers d'un cas clinique d'une grossesse gémellaire associée à la pyélonéphrite aigue droite avec stéatose hépatique aiguë en milieu de réanimation. PMID:24396557

  6. Pronostic visuel et évolution réfractive après chirurgie de la cataracte congénitale avec implantation primaire: étude d'une série de 108 cas

    PubMed Central

    Hafidi, Zouheir; Ibrahimy, Wafaa; Ahid, Samir; Handor, Hanan; Ouafae Cherkaoui, Lalla; Bencherif, Zahid; Laghmari, Mina; Ouazzanni, Btissam; Boutimzine, Noureddine; Daoudi, Rajae

    2013-01-01

    La cataracte congénitale constitue la cause la plus fréquente de cécité évitable chez les enfants. Le but de cette étude est d’évaluer le pronostic réfractif et fonctionnel, des enfants opérés de cataracte congénitale avec implantation. Il s'agit d'une étude rétrospective de 108 enfants, dont 85 cataractes bilatérales, 23 unilatérales opérés entre 2007 et 2011. La réfraction a été mesurée à 1 mois, 3 mois, 6 mois, 1 an, 2 ans, 3 ans et/ou 4 ans en post-opératoire. La meilleure acuité visuelle corrigée, ainsi que l'incidence des complications post-opératoires ont été analysé. L’âge moyen de la chirurgie était de 25 mois avec une durée moyenne de suivi de 3,17 ans. Les complications retrouvées étaient l'inflammation, la prolifération secondaire, et le glaucome. L'acuité visuelle (AV) moyenne corrigée finale était de 5,75/10e pour les formes bilatérales, et de 4,16/10e pour les unilatérales (p = 0,001). Les facteurs de mauvais pronostic retrouvés étaient l’âge tardif de la chirurgie, la densité de la cataracte et la survenue de complications (p = 0,001). L'incidence des complications post-opératoires était significativement plus élevé chez les enfants opérés à un jeune âge (p = 0,001). Les facteurs de mauvais pronostic visuel chez les enfants opérés pour cataracte congénitale avec implantation, sont représentés par le caractère unilatéral de la cataracte, l’âge tardif de la chirurgie, la densité de la cataracte et la survenue de complications post opératoires. PMID:24672622

  7. Mutuelles de santé en Afrique : caractéristiques et relations contractuelles avec les prestataires de soins pour la prise en charge de la qualité des soins.

    PubMed

    Ndiaye, Pascal; Vanlerberghe, Veerle; Lefèvre, Pierre; Criel, Bart

    2015-01-16

    En Afrique, une part importante de la population est encore confrontée à plusieurs barrières pour accéder aux soins. Les mutuelles de santé (MS) sont mises en place pour réduire la barrière financière et assurer à leurs membres un accès à des soins de qualité. Les MS établissent des relations avec les prestataires de soins sous forme de contrat, dont certaines clauses peuvent contenir des notions de qualité des soins (QS). A travers une vue d'ensemble de la typologie de 180 MS de 14 pays (dans Afrique Ouest et Centrale), cet article vise à analyser dans quelle mesure les caractéristiques des MS influencent la mise en œuvre de mécanismes contractuels susceptibles de faciliter la discussion sur la QS. L'hypothèse de cette association a été étudiée avec trois types de caractéristiques (taille, utilisation des services et volume des soins achetés) et huit variables relatives à la contractualisation et la QS (existence d'un contrat, organisation de rencontres, fréquence de ces rencontres, présence de notions de QS dans le contrat, négociation du contrat, révision du contrat, révision des clauses spécifiques à la QS et organisation de rencontres pour discuter de QS). Les MS de type communautaire représentent 80% des mutuelles étudiées (60% d'entre elles sont localisées en zone rurale). Les MS professionnelles représentent 17% et se concentrent principalement au Mali et en Côte d'Ivoire. La quasi-totalité des MS disposent de contrats écrits et contenant des notions relatives à la QS. Bien que les MS de grande taille ayant des résultats financiers importants négocient plus les aspects liés à la qualité des soins lors de l'élaboration de la convention, les MS de taille et aux performances financières plus modestes mettent en œuvre des mécanismes plus réguliers de concertation avec les prestataires. Ces rencontres sont susceptibles de créer un espace de prise en charge de la QS.

  8. Listériose humaine : Expériences cliniques avec cette zoonose chez 12 patients en Estrie, Québec sur une période de 19 ans (1976 à 1995)

    PubMed Central

    Maziade, Pierre-Jean; Marcoux, J André

    1997-01-01

    Une étude rétrospective a été faite dans le but de réviser l’épidémiologie, les facteurs de risque, les manifestations cliniques et l’évolution des cas d’infection à Listeria monocytogenes en Estrie, Québec de 1976–1995. Les patients ont été repérés à partir des cultures positives et du diagnostic donné par le Service des maladies infectieuses du Centre hospitalier universitaire de Sherbrooke, Sherbrooke, Québec. Un total de 12 patients ont fait partie de l’étude. La septicémie non reliée à la grossesse (4/12) et la méningite (6/12) ont été les deux présentations cliniques majeures. Il y avait 1 cas de listériose de grossesse et 1 cas de granulomatosis infanti septica. Dix patients avaient au moins une condition prédisposante. Un seul décès a été attribué à l’infection à L monocytogenes. Des séquelles neurologiques ont été observées chez la moitié des patients avec méningite tandis qu’aucune séquelle a été notée chez ceux avec septicémie. En conclusion, la listériose est une maladie de patients âgés et immunocompromis. La présentation clinique et l’évolution ne sont pas différentes de ce qui a déjà été rapporté dans d’autres régions industrialisées. PMID:22514474

  9. Complexation des acides aminés basiques arginine, histidine et lysine avec l'ADN plasmidique en solution aqueuse : participation à la capture de radicaux sous irradiation X à 1,5 keV

    NASA Astrophysics Data System (ADS)

    Tariq Khalil, Talat; Taillefumier, Baptiste; Boulanouar, Omar; Mavon, Christophe; Fromm, Michel

    2016-09-01

    L'environnement chimique de l'ADN en situation biologique est complexe notam-ment en raison de la présence d'histones, protéines nucléaires, associées en quantité approximativement égales à l'ADN pour former la chromatine. Les histones possèdent de nombreux radicaux basiques arginine et lysine chargés positivement et dont la majorité se trouve sur les chaînes émergentes, l'ADN présente quant à lui des charges négatives sur ses groupements phosphates localisés tout au long de la double hélice. Dans cette étude, la complexité de la structure de la chromatine nucléaire est dans un premier temps mimée en solution aqueuse par la formation de complexes entre un ADN plasmidique sonde et les trois acides aminés basiques, Arg, His, Lys, qui, mis à part His, sont protonés au pH physiologique. Ces acides aminés libres en solution sont réputés être des capteurs efficaces de radicaux libres, notamment pour le radical hydroxyle, conférant ainsi un pouvoir protecteur vis-à-vis des effets indirects sur l'ADN en situation d'exposition aux rayonnements ionisants. A concentration fixée, les capacités de capture des acides aminés libres, σ, pour le radical hydroxyle sont typiquement les suivantes σHis ≈σArg > σLys (σLys ≈ 0,1 × σArg). Nous avons mesuré les taux de cassures simple brin par plasmide et par Gray (χ) lors d'expositions de solutions aqueuses de complexes [acide aminé - ADN plasmidique] aux rayons X ultra-mous (1,5 keV). A concentrations égales, les trois acides aminés complexés et présents en large excès ne manifestent pas une capacité de protection de l'ADN proportionnelle à leur capacité de capture libre et en solution ; on trouve en effet des taux de cassures dans l'ordre suivant χHis > χArg > χLys (χLys ≈ 0,01 χArg). Après avoir détaillé le mode opératoire de ces mesures, nous analyserons sur des bases bibliographiques, les modes spécifiques d'interaction des acides aminés basiques avec l'ADN. La sp

  10. Prévalence, facteurs associés et prédisposant au syndrome métabolique chez les personnes vivants avec le VIH sous traitement antirétroviral à Porto-Novo en 2014

    PubMed Central

    Adébayo, Alassani; Albert, Dovonou Comlan; Ericie, Sossou; Angelo, Attinsounon Cossi; Jules, Gninkoun; Armand, Wanvoegbe; Séraphin, Ahoui; Léopold, Codjo; Gabriel, Ade

    2015-01-01

    Introduction Le syndrome métabolique est associé aux maladies cardiovasculaires. L'infection au VIH est devenue aujourd'hui une maladie chronique. L'objectif de cette étude est de déterminer la prévalence, les facteurs associés et prédisposant au syndrome métabolique chez les patients infectés par le VIH sous traitement antirétroviral. Méthodes Il s'est agi d'une étude transversale, descriptive et analytique. La population d’étude est constituée des patients vivant avec le VIH sous antirétroviral suivis au Centre Hospitalier Universitaire de l'Ouémé-Plateau. Le syndrome métabolique a été défini selon les critères de la Fédération Internationale du Diabète. Résultats La population était constituée de 244 patients. La prévalence du syndrome métabolique était de 18,03% avec une prédominance féminine (74,6%). La moyenne d’âge était de 40,7 ± 9,71 ans. Les facteurs associés au syndrome métabolique étaient le sexe féminin, la sédentarité, l'antécédent d'HTA, le surpoids, l'apport énergétique élevé, l'apport lipidique élevé, la consommation d'alcool, la consommation de tabac et l'hypercholestérolémie. Les facteurs prédisposant au syndrome métabolique étaient la présence de l'HTA, le tour de taille élevé, l'hyperglycémie, l'hypocholestérolémie HDL et l'hypertriglycéridémie. Conclusion Le syndrome métabolique est fréquent chez les patients infectés par le VIH sous traitement antirétroviral. Une prévention prenant en compte les facteurs associés et prédisposant s'avère nécessaire. PMID:26966492

  11. Résultats fonctionnels de la chirurgie de la cataracte par phacoalternative avec implantation en chambre postérieure: à propos de 300 cas à Bobo Dioulasso (Burkina Faso)

    PubMed Central

    Diallo, Jean Wenceslas; Meda, Nonfounikoun; Ahnoux-Zabsonre, Ahgbatouhabéba; Yameogo, Claudette; Dolo, Mariam; Sanou, Jérôme; Daboue, Arsène

    2015-01-01

    La cataracte est la première cause de cécité curable dans le monde. Son traitement est chirurgical. Le but de notre travail a été d’évaluer les résultats de la phacoalternative ou la chirurgie de la cataracte à petite incision. Il s'est agi d'une étude transversale descriptive à collecte prospective allant du 1er janvier au 31 septembre 2014, chez des patients âgés d'au moins 40 ans. Les données socio-démographiques, l'acuité visuelle, l'astigmatisme et les complications ont été évalués. Nous avons inclus 300 yeux de 286 patients. L’âge moyen était de 66 ans (écart type 9,93) avec une prédominance masculine de 57,7%. Les co-morbidités étaient dominées par l'hypertension artérielle 30,33% des cas. L'acuité visuelle pré-opératoire était de moins de 1/20è dans 70, 7% des cas. En biométrie, la puissance moyenne était de 21,50 dioptries. L'implant posé a été adéquat dans 60%. Les principales complications per-opératoires étaient le chémosis post-anesthésie 4,67% et l'issue de vitrée moins de 2% des cas. Les complications post opératoires précoces ont été dominées par l’œdème de cornée 26,33%, et les complications tardives par la cataracte secondaire. L'astigmatisme induit était de 1, 12 dioptrie en moyenne (écart type 1,26). Sans correction, les résultats visuels étaient mauvais dans moins de 1%, limites dans 31%, et bons 68% suivants les normes de l'Organisation Mondiale de la Santé. La phacoalternative donne des résultats satisfaisants, avec peu de complications. L'amélioration du plateau technique et la disponibilité d'implants adéquats pourraient les améliorer. PMID:26140073

  12. SIR-B - The second Shuttle Imaging Radar experiment

    NASA Technical Reports Server (NTRS)

    Cimino, J.; Elachi, C.; Settle, M.

    1986-01-01

    On October 5, 1984, the second Shuttle Imaging Radar (SIR-B) was launched into orbit aboard the Space Shuttle Challenger. SIR-B is part of an evolutionary radar program designed to progressively develop a multifrequency, multipolarization synthetic aperture radar with a variable earth-imaging geometry. The SIR-B instrument is an upgraded version of SIR-A, with the additional capability of tilting the antenna mechanically to acquire imagery at variable incidence angles ranging from 15 to 60 deg. The variable look angle capability provided a means of acquiring multiple incidence angle imagery over specific targets on successive days of the mission. These data are being used to classify surface features by their backscatter signatures as a function of incidence angle and for topographic mapping. In addition to the antenna tilt capability, a digital data-handling system was added to increase the dynamic range, the resolution was improved by a factor of two over SIR-A, and a calibration subsystem was added to improve the radiometric accuracy of the data. The mission had a number of problems, including loss of the primary digital data path between the Shuttle and the ground. In spite of these problems, approximately 20 percent of the planned digital data were collected over the 8-day Shuttle mission corresponding to an areal coverage of about 6.4 million sq km.

  13. Diffusion du champ électromagnétique dans une sphère ferromagnétique conductrice avec hystérésis

    NASA Astrophysics Data System (ADS)

    Saadi, M.; Jellali, F.; Quichaud, G.

    1995-09-01

    This paper deals with the numerical simulation of a hard steel sphere magnetization under a pulsed current through a solenoid. We could show that the association of the induced current and the magnetic hysteresis leads to a permanent trapped flux loop. We could also confirm the existence of this phenomenon by means of experiment. Cet article concerne la simulation numérique de l'aimantation d'une sphère en acier dur par une brève impulsion de courant dans un soléndide. On montre que les courants induits et l'hystérésis magnétique conduisent à un flux d'induction rémanent piégé d'une façon permanente dans cette sphère. On donne également une mise en évidence expérimentale de ce phénomène.

  14. Psychology Experiments.

    ERIC Educational Resources Information Center

    McGraw, Ken; Tew, Mark D.; Williams, John E.

    2001-01-01

    A goal of the PsychExperiments project was to reduce the financial burden on psychology departments for hardware/software used in their laboratories. In its third year, the PsychExperiments site now hosts 39 experiments. Over 200 classrooms worldwide have signed up as official site users and there have been nearly 10,000 data sessions conducted.…

  15. Psychology Experiments.

    ERIC Educational Resources Information Center

    McGraw, Ken; Tew, Mark D.; Williams, John E.

    2001-01-01

    A goal of the PsychExperiments project was to reduce the financial burden on psychology departments for hardware/software used in their laboratories. In its third year, the PsychExperiments site now hosts 39 experiments. Over 200 classrooms worldwide have signed up as official site users and there have been nearly 10,000 data sessions conducted.…

  16. Epidemiological survey of haemophiliacs with inhibitors in France: orthopaedic status, quality of life and cost--the 'Statut Orthopédique des Patients Hémophiles' avec Inhibiteur study.

    PubMed

    Stieltjes, Natalie; Torchet, Marie F; Misrahi, Laure; Roussel-Robert, Valérie; Lambert, Thierry; Guérois, Claude; Bertrand, Marie A; Briquel, Marie E; Borel-Derlon, Annie; Dirat, Gérard

    2009-01-01

    The physical condition of severe haemophilia and the impact of advances in replacement therapy have been much studied, but little work has been done on patients who developed inhibitors. The 'Statut Orthopédique des Patients Hémophiles avec Inhibiteur' study was conducted in France in order to assess the orthopaedic status and quality of life of such patients, and the cost of their medical management. Fifty haemophiliacs aged 12-63 years with a history of high-responder inhibitors were included. Clinical assessment showed that only 12% of the patients had a nil pain score and 2% a nil clinical score, as per Gilbert scale. The mean clinical score was significantly higher in patients over 35 years of age than in younger ones. However, younger patients appeared to have a more impaired orthopaedic status than young haemophiliacs without inhibitors of similar age in previous published cohorts. Surprisingly, older haemophiliacs tended to have the best mental quality of life, contrasting with their highly impaired orthopaedic condition and physical quality of life. The mean cost of clinical resources consumed during the year preceding enrolment was Euro 268 999, 99% of which was related to clotting factor. Marked between-patient differences in cost were noted. Our study suggests that the management of haemophiliacs with inhibitors should be improved in order to prevent haemophilic arthropathy to an extent similar to that of patients without inhibitors. Cost-benefit assessment of any therapeutic strategy should always be combined with quality-of-life evaluation.

  17. Réalisation d'un réseau de pièges annulaires : une première étape vers une porte logique quantique avec des atomes froids

    NASA Astrophysics Data System (ADS)

    Dépret, B.; Verkerk, P.; Hennequin, D.

    2002-06-01

    L'objectif de ce projet est de réaliser une porte logique quantique basée sur l'interaction d'atomes dans deux sites voisins dans un réseau optique très désaccordé. Le principal obstacle rencontré vient du faible taux d'occupation des sites de tels réseaux. Nous proposons ici de mettre en oeuvre un nouveau type de réseaux optiques qui devraient pallier cette limitation. Il s'agit d'un réseau unidimensionnel de pièges annulaires “empilés” avec une période de λ/2. L'utilisation d'axicons conduit à une géométrie adaptée des faisceaux et donne le confinement radial dans les anneaux. Le mouvement azimutal peut également être limité par une force auxiliaire. Le bon taux d'occupation est lié au faible nombre de sites remplis à partir du nuage d'atomes froids initial.

  18. Hématome post traumatique du muscle iléopsoas avec paralysie du nerf fémoral: à propos d'un cas et revue de la littérature

    PubMed Central

    Sallahi, Hicham; Margad, Omar; Lamkhantar, Adil; idrissi, Khalid Koulali

    2015-01-01

    L'hématome compressif du muscle iliopsoas dans le petit bassin est une complication connue des traitements anticoagulants, mais reste rare en post-traumatique. La présente observation illustre un cas de cet hématome chez un adolescent de 14 ans qui s'est présenté avec une douleur post-traumatique de la cuisse et un déficit actif d'extension de la jambe évoluant depuis plus de 3 mois. Un examen clinique a montré l'existence d'une paralysie complète du quadriceps. Une IRM du petit bassin a retrouvé un volumineux hématome du muscle iliopsoas comprimant le nerf fémoral. Un drainage chirurgical de l'hématome a été réalisé. La récupération musculaire était partielle après six mois de recul. PMID:26113929

  19. Structure des fluides de bâtonnets polaires et polarisables dans l'approximation des chaînes hypertressées avec amplification du potentiel répulsif. Un modèle simple d'acétonitrile liquide.

    NASA Astrophysics Data System (ADS)

    Salamito, B.; Fries, P. H.

    1991-07-01

    We study fluids of rigid rods which are generated by a distribution of line sites and which carry a polarizable electric point dipole at their centre. We examine the difficulties for solving the integral equations, which result from truncating the rotational invariant expansion of the usual intermolecular rapidly varying shape potentials. In order to overcome these convergence problems, soft shape potentials are used in addition to an approximation HNCAR, of the hypernetted chain (HNC) type, which Amplifies these soft Repulsive effects. The polarization due to all the molecules is treated at a self-consistent mean field level. This formalism is applied to a model of liquid acetonitrile at 291K. The Kirkwood factors, the dielectric constant, and the cross sections of neutron or X-rays diffraction studies are in good agreement with experiment. This justifies the theoretical molecular pair distribution, from which the local molecular order is carefully analyzed. On étudie des fluides de bâtonnets rigides engendrés par une distribution de sites alignés et portant en leur centre un dipôle électrique ponctuel polarisable. On examine les difficultés de résolution des équations intégrales liées à la troncature du développement en invariants rotationnels des potentiels de forme intermoléculaires usuels à variation rapide. Pour contourner ces problèmes de convergence on utilise des potentiels de forme molle combinés à une approximation HNCAR, du type des chaînes hypertressées (HNC), qui Amplifie ces effets Répulsifs mous. On traite la polarisation due à l'ensemble des molécules par une approximation auto-cohérente de champ moyen. On applique ce formalisme à un modèle d'acétonitrile liquide à 291K. Les facteurs de Kirkwood, la constante diélectrique et les sections efficaces de diffusion des neutrons ou des rayons X calculés sont en bon accord avec l'expérience. Ceci justifie la distribution théorique de paires de molécules à partir de

  20. Perception de la verticale avec Un cadre visuel solidaire de la tete: implications pour la conception des afficheurs de casques en ae’ronauflque (Perception of the Vertical With a Head-Mounted Visual Frame: Implication for the Design of Helmet-Mounted Displays in Aeronautics)

    DTIC Science & Technology

    2003-02-01

    leurs changements d’orientation. L’orientation du cadre solidaire de la tete ne peut etre 6valude que sur la base des signaux de position de la tete...r6fdrentiel c6phalocentr6 sont inexistantes. Au contraire, lorsque lorientation du cadre est dissoci6e de celle de la tete, toute rotation peut etre ...rapport it la tete peuvent etre prises en compte en conjonction avec les signaux vestibulaires et proprioceptifs qui renseignent sur lorientation de la

  1. BISE Experiment

    NASA Image and Video Library

    2010-08-30

    ISS024-E-012668 (30 Aug. 2010) --- NASA astronaut Tracy Caldwell Dyson, Expedition 24 flight engineer, uses Neurospat hardware to perform the Bodies in the Space Environment (BISE) experiment in the Destiny laboratory of the International Space Station. The Canadian Space Agency-sponsored BISE experiment studies how astronauts perceive up and down in microgravity.

  2. BISE Experiment

    NASA Image and Video Library

    2010-08-30

    ISS024-E-012670 (30 Aug. 2010) --- NASA astronaut Tracy Caldwell Dyson, Expedition 24 flight engineer, uses Neurospat hardware to perform the Bodies in the Space Environment (BISE) experiment in the Destiny laboratory of the International Space Station. The Canadian Space Agency-sponsored BISE experiment studies how astronauts perceive up and down in microgravity.

  3. Language Experience

    ERIC Educational Resources Information Center

    Bugh, Marylou

    1978-01-01

    When a child uses his words and his ideas in learning to read, he also assists in the normal integration of his personality. Starting with a method of language experience developed by Sylvia Ashton-Warner, the author, a reading consultant, describes a language experience-reading program which utilizes the student's own curiosity and interests. (RK)

  4. Simulated Experiments

    ERIC Educational Resources Information Center

    Snadden, R. B.; Runquist, O.

    1975-01-01

    Presents an experiment in which a programmable calculator is employed as a data generating system for simulated laboratory experiments. The example used as an illustration is a simulated conductimetric titration of an aqueous solution of HC1 with an aqueous solution of NaOH. (Author/EB)

  5. Choice experiments

    Treesearch

    Thomas P Holmes; Wiktor L Adamawicz; Fredrik Carlsson

    2017-01-01

    There has been an explosion of interest during the past two decades in a class of nonmarket stated-preference valuation methods known as choice experiments. The overall objective of a choice experiment is to estimate economic values for characteristics (or attributes) of an environmental good that is the subject of policy analysis, where...

  6. TRIO experiment

    SciTech Connect

    Clemmer, R.G.; Finn, P.A.; Malecha, R.F.; Misra, B.; Billone, M.C.; Bowers, D.L.; Fischer, A.K.; Greenwood, L.R.; Mattas, R.F.; Tam, S.W.

    1984-09-01

    The TRIO experiment is a test of in-situ tritium recovery and heat transfer performance of a miniaturized solid breeder blanket assembly. The assembly (capsule) was monitored for temperature and neutron flux profiles during irradiation and a sweep gas flowed through the capsule to an anaytical train wherein the amounts of tritium in its various chemical forms were determined. The capsule was designed to operate at different temperatures and sweep gas conditions. At the end of the experiment the amount of tritium retained in the solid was at a concentration of less than 0.1 wppM. More than 99.9% of tritium generated during the experiment was successfully recovered. The results of the experiment showed that the tritium inventories at the beginning and at the end of the experiment follow a relationship which appears to be characteristic of intragranular diffusion.

  7. Hydronuclear experiments

    SciTech Connect

    Thorn, R.N.; Westervelt, D.R.

    1987-02-01

    Hydronuclear experiments, a method for assessing some aspects of nuclear weapon safety, were conducted at Los Alamos during the 1958 to 1961 moratorium on nuclear testing. The experiments resulted in subcritical multiplying assemblies or a very slight degree of supercriticality and, in some cases, involved a slight, but insignificant, fission energy release. These experiments helped to identify so-called one-point safety problems associated with some of the nuclear weapons systems of that time. The need for remedial action was demonstrated, although some of the necessary design changes could not be made until after the resumption of weapons testing at the end of 1961.

  8. Interpretive Experiments

    ERIC Educational Resources Information Center

    DeHaan, Frank, Ed.

    1977-01-01

    Describes an interpretative experiment involving the application of symmetry and temperature-dependent proton and fluorine nmr spectroscopy to the solution of structural and kinetic problems in coordination chemistry. (MLH)

  9. Interpretive Experiments

    ERIC Educational Resources Information Center

    DeHaan, Frank, Ed.

    1977-01-01

    Describes an interpretative experiment involving the application of symmetry and temperature-dependent proton and fluorine nmr spectroscopy to the solution of structural and kinetic problems in coordination chemistry. (MLH)

  10. Wanted: Experiments

    ERIC Educational Resources Information Center

    McDaniel, Floyd D.

    1974-01-01

    Describes a project to produce a series of laboratory manuals and instructional materials in which nuclear experiments are presented for the undergraduate advanced laboratory. The manuals are being compiled in the areas of physics, chemistry, geology and environmental sciences. (BR)

  11. Wanted: Experiments

    ERIC Educational Resources Information Center

    McDaniel, Floyd D.

    1974-01-01

    Describes a project to produce a series of laboratory manuals and instructional materials in which nuclear experiments are presented for the undergraduate advanced laboratory. The manuals are being compiled in the areas of physics, chemistry, geology and environmental sciences. (BR)

  12. EXPERIMENT - SHUTTLE

    NASA Image and Video Library

    1982-03-05

    S82-27835 (26 Feb. 1982) --- The astronaut crew members for NASA?s third space transportation system (STS-3) flight meet with Todd E. Nelson, who devised a scientific experiment to fly on their mission. Astronauts Jack R. Lousma, left, commander, and C. Gordon Fullerton, pilot, along with the 18-year-old high school senior, discussed the experiment, entitled ?Insects in Flight Motion Study,? during a press briefing in JSC?s public affairs facility. Photo credit: NASA

  13. EXPERIMENTS - SHUTTLE

    NASA Image and Video Library

    1982-03-01

    S82-27604 (26 Feb. 1982) --- The astronaut crew members for NASA?s third space transportation system (STS-3) flight meet with Todd E. Nelson, who devised a scientific experiment to fly on their mission. Astronauts Jack R. Lousma, left, commander, and C. Gordon Fullerton, pilot, along with the 18-year-old high school senior, discussed the experiment, entitled ?Insects in Flight Motion Study,? during a press briefing in JSC?s public affairs facility. Photo credit: NASA

  14. Experiment Databases

    NASA Astrophysics Data System (ADS)

    Vanschoren, Joaquin; Blockeel, Hendrik

    Next to running machine learning algorithms based on inductive queries, much can be learned by immediately querying the combined results of many prior studies. Indeed, all around the globe, thousands of machine learning experiments are being executed on a daily basis, generating a constant stream of empirical information on machine learning techniques. While the information contained in these experiments might have many uses beyond their original intent, results are typically described very concisely in papers and discarded afterwards. If we properly store and organize these results in central databases, they can be immediately reused for further analysis, thus boosting future research. In this chapter, we propose the use of experiment databases: databases designed to collect all the necessary details of these experiments, and to intelligently organize them in online repositories to enable fast and thorough analysis of a myriad of collected results. They constitute an additional, queriable source of empirical meta-data based on principled descriptions of algorithm executions, without reimplementing the algorithms in an inductive database. As such, they engender a very dynamic, collaborative approach to experimentation, in which experiments can be freely shared, linked together, and immediately reused by researchers all over the world. They can be set up for personal use, to share results within a lab or to create open, community-wide repositories. Here, we provide a high-level overview of their design, and use an existing experiment database to answer various interesting research questions about machine learning algorithms and to verify a number of recent studies.

  15. The Experiment

    NASA Astrophysics Data System (ADS)

    Mariana Nicoara, Floare

    2016-04-01

    My name is Nicoara Floarea and I am teacher at Secondary School Calatele and I teach students from preparatory class and the second grade . They are six-eight years old. In my activity, for introducing scientific concepts to my students, I use various and active methods or traditional methods including experiments. The experiment stimulates students' curiosity, their creativity, the understanding and knowledge taught accessibility. I propose you two such experiments: The life cycle of the plants (long-term experiment, with rigorous observation time):We use beans, wheat or other; They are grown in pots and on the cotton soaked with water,keeping under students' observation protecting them ( just soak them regularly) and we waiting the plants rise. For discussions and comments of plant embryo development we use the plants which rose on the cotton soaked with water plants at the end of the first week. Last school year we had in the pot climbing beans which in May made pods. They were not too great but our experiment was a success. The students could deduce that there will develop those big beans which after drying will be planted again. The influence of light on plants (average duration experiment with the necessary observation time): We use two pots in which plants are of the same type (two geraniums), one of them is situated so as to get direct sunlight and other plant we put in a closed box. Although we wet both plants after a week we see that the plant that benefited from sunlight has turned strain in direct sunlight, developing normally in return the plant out of the box I have yellowed leaves, photosynthesis does not She has occurred . Students will understand the vital role of the Sun in plants' life, both in the classroom and in nature. The experiment is a method of teaching students extremely pleasant, with a remarkable percentage of acquiring more knowledge.

  16. Experiment 2042

    SciTech Connect

    Dash, Zora V.; Dennis, Bert R.; Dreesen, Donald S.; Fehler, Michael C.; House, Leigh S.; Walter, Fritz; Zyvoloski, George A.

    1984-09-10

    Experiment 2042, an injection test in EE-3, was conducted from May 15, 1984 through May 19, 1984. During this four day test ~2 million gallons of water were injected with a maximum injection rate of ~10BPM at 6000 psi. It was planned as a pumping test of the lower zone of well EE-3 (the open hole region from 11,400 ft to 11,648 ft) to test the reservoir characteristics and fracture-seismic system first created during Experiment 2025. However early in the experiment it became apparent that there was some sort connection between the lower zone and the upper "low pressure" zone in EE-3 (from the casing shoe at 10374 ft to about 10900 ft). Available information ruled out a packer failure or other direct connection between these zones so the experiment was continued as planned. Although not a major goal of the experiment, it was hoped that fractures would propagate from EE-3 to EE-2, so hydraulic communication could be established between the two wells, however this did not occur.

  17. Le Higgs avec de grandes dimensions supplementaires

    NASA Astrophysics Data System (ADS)

    Benakli, Karim; Quirós, Mariano

    2003-04-01

    Transverse (submillimeter) and longitudinal (TeV) extra dimensions can help in dealing with the Higgs hierarchy problem. On the one hand large transverse dimensions can lower the fundamental scale of quantum gravity from the Planck scale to the TeV range. On the other hand longitudinal dimensions can provide genuine extra-dimensional symmetries (higher dimensional gauge symmetry and/or supersymmetry) to protect the Higgs mass against ultraviolet sensitivity. In this article we review recent developments along these directions. To cite this article: K. Benakli, M. Quirós, C. R. Physique 4 (2003).

  18. Entrevue avec le Dr Charley Zeanah

    PubMed Central

    2013-01-01

    Le Dr Charles Zeanah est titulaire de la chaire de psychiatrie Mary K. Sellars-Polchow, professeur de pédiatrie clinique et vice-président de la pédopsychiatrie au département de psychiatrie et des sciences du comportement de la faculté de médecine de l’Université Tulane, à la Nouvelle-Orléans. Il est également directeur général de l’institut de la santé mentale des nourrissons et des jeunes enfants de Tulane. Il est récipiendaire de nombreux prix, notamment le prix de prévention Irving Phillips (AACAP), la mention élogieuse présidentielle pour sa recherche et son leadership exceptionnels en santé mentale des nourrissons (American Orthopsychiatric Association), le prix d’excellence clinique Sarah Haley Memorial (International Society for Traumatic Stress Studies), le prix de recherche en pédopsychiatrie Blanche F. Ittelson (APA), et le prix Serge Lebovici Award soulignant les contributions internationales à la santé mentale des nourrissons (World Association for Infant Mental Health). Le Dr Zeanah est fellow distingué de l’AACAP, fellow distingué de l’APA et membre du conseil d’administration de Zero to Three. Il est l’éditeur scientifique de Handbook of Infant Mental Health (3e édition) qui est considéré comme étant le manuel de pointe et la référence de base du domaine de la santé mentale des nourrissons.

  19. Recherche de charginos et neutralinos dans le canal dimuon de meme signe aupres de l'experience DØ - FNAL

    SciTech Connect

    Lesne, Vincent

    2006-07-01

    Dans le cadre du modele mSUGRA qui decrit un mecanisme de brisure simple de la supersym etrie, des sparticules avec des masses au-del a des limites fixees par les experiences de LEP II peuvent etre produites au Tevatron, collisionneur p$\\bar{p}$ delivrant une energie de 1.96 TeV dans le centre de masse. Un canal privilegie pour la d´ecouverte de la supersymetrie au Tevatron est la production associee du plus leger chargino, $\\tilde{χ}$$±\\atop{1}$ , et du second plus leger neutralino, $\\tilde{χ}$$0\\atop{2}$ . Les modes de desintegration leptoniques, $\\tilde{χ}$$0\\atop{2}$ → $\\tilde{χ}$$0\\atop{1}$ ℓ+- et $\\tilde{χ}$$±\\atop{1}$ → $\\tilde{χ}$$0\\atop{1}$ ℓ±νl, conduisent a une signature claire avec trois leptons et un quantite significative d’energie transverse manquante.

  20. Neutrino Experiments

    SciTech Connect

    McKeown, R. D.

    2010-08-04

    Recent studies of neutrino oscillations have established the existence of finite neutrino masses and mixing between generations of neutrinos. The combined results from studies of atmospheric neutrinos, solar neutrinos, reactor antineutrinos and neutrinos produced at accelerators paint an intriguing picture that clearly requires modification of the standard model of particle physics. These results also provide clear motivation for future neutrino oscillation experiments as well as searches for direct neutrino mass and nuclear double-beta decay. I will discuss the program of new neutrino oscillation experiments aimed at completing our knowledge of the neutrino mixing matrix.

  1. Facteurs influençant l'initiation au traitement antirétroviral des personnes vivant avec le VIH dans les Centres de Traitement Agréés de Bamenda et de Bertoua au Cameroun

    PubMed Central

    Mbopi-Keou, Francois-Xavier; Voundi, Esther Voundi; Kalla, Ginette Claude Mireille; Emah, Irène; Angwafo, Fru; Muna, Walinjom

    2014-01-01

    Introduction L'objectif de ce travail était de déterminer les facteurs influençant l'initiation au traitement antirétroviral des personnes vivant avec le VIH (PVVIH) dans les centres de traitements agrées (CTA) de Bamenda et de Bertoua au Cameroun. Méthodes Il s'agissait d'une étude transversale, analytique réalisée de Janvier à Avril 2011, dans les CTA de Bamenda et de Bertoua. Pour cette étude, nous avons obtenu une clairance éthique. Résultats Nous avons étudiés 460 dossiers de patients séropositifs en phase d'initiation au traitement antirétroviral dans les CTA de Bamenda et de Bertoua, 53,9% et 46,1% respectivement. L ‘âge médian était de 36 ans. La plupart des séropositifs à Bertoua (41) avaient fait un dépistage volontaire du VIH par rapport à ceux de Bamenda (22) (p= 0.008). Il y ‘avait plus de VIH de type 1 et 2 dans le CTA de Bamenda (15) par rapport à Bertoua (3) (p= 0.011). La majorité des patients était classé au stade clinique II à Bamenda (54,0%) tandis qu ‘à Bertoua le stade clinique III était prédominant (52,4%) (p = 0,000). Le taux médian de CD4 était de 133 cellules/mm3 dans le CTA de Bamenda et de 175 cellules/mm3 à Bertoua (p = 0,008). La Zidovudine était plus prescrit à Bamenda et le Ténofovir à Bertoua (p = 0,000). L ‘Efavirenz était plus prescrit à Bertoua tandis que la Névirapine l ‘était plus à Bamenda (p = 0,000). Le Lopinavir/r était plus prescrit à Bamenda qu ‘à Bertoua (p = 0,017). Conclusion Il apparait urgent de standardiser la prise en charge des PVVIH dans les CTA du Cameroun. PMID:25184023

  2. Ondes de surface transverses sur plaques piézoélectriques avec réseaux de bandes metalliques déposés sur les 2 faces

    NASA Astrophysics Data System (ADS)

    Ballandras, S.; Gavignet, E.; Bigler, E.

    1995-09-01

    A theoretical model has been implemented to study surface transverse waves propagating on piezoelectric plates of finite thickness with thin metal strip gratings on both sides. Calculations have been performed for AT-cuts of quartz of thickness varying from 140 to 120 μm. The spatial period of the gratings was fixed to 20 μm (acoustic wavelength equal to 40 μm). The dispersion curve relating the angular frequency to the wavenumber presents more than one stopband as found in the usual analyses on semi-infinite substrates. These multiple high-frequency stopbands allow to design and realize high stability resonators or highly sensitive sensors for gravimetry, accelerometer applications, etc. Un modèle théorique a été mis en œuvre pour l'étude des propriétés des ondes de surface transverses se propageant sur des plaques piézoélectriques d'épaisseur finie avec des réseaux de fines bandes métalliques déposés sur chaque face. Les calculs ont été effectués pour des plaques de quartz voisines de la coupe AT et d'épaisseur variant de 140 à 120 μm. La périodicité des réseaux en regard a été fixée à 20 μm (longueur d'onde acoustique 40 μm). La courbe de dispersion reliant la pulsation au nombre d'ondes présente plusieurs bandes d'arrêt incluant celle habituellement mise en évidence pour un substrat semi-infini. L'existence de ces multiples bandes d'arrêt haute fréquence ouvre de nouvelles perspectives pour la réalisation de résonateurs ultrastables ou de capteurs de très grande sensibilité gravimétrique, accélérométrique, etc.

  3. Etude comparative des complications liées à l'utilisation du cathéter veineux périphérique avec et sans système clos à bouchon hépariné

    PubMed Central

    Liu, Ying Chun; Seydou, Togo; Sadio, Yéna; Liang, Tu Zheng; Ge, jin

    2015-01-01

    Introduction L'utilisation correcte du système clos à bouchon hépariné sur les cathéters périphériques pendant les perfusions est une pratique courante dans les pays développés et aussi dans plusieurs pays en développement selon un consensus international établi. Nous comparons les résultats de la formation de thrombus et de l'infection liées au cathéter veineux périphérique chez les patients ayant bénéficié de perfusion avec système clos à bouchon hépariné (groupe expérimentale) et ceux qui ont été perfusé sans bouchon hépariné (groupe témoin). Méthodes Nous avons colligé 100 patients hospitalisés pendant la période de Juillet 2014 à Décembre 2014 dans le service d'hospitalisation de chirurgie thoracique de l'hôpital du Mali qui ont été repartis en 2 groupes de 50 patients chacun pour une analyse comparative. L'observation du thrombus dans la lumière du cathéter est effectuée puis enregistré et tous les cathéters ont été repris pour réalisation de culture bactérienne au laboratoire dans les 2 groupes. Résultats Dans le groupe témoin, il existe un thrombus dans la lumière du cathéter dans 36 cas (72%) et l'examen de culture bactérienne était positif dans 90%. Tandis que dans le groupe expérimental on retrouve 3 cas (6%) de thrombose du cathéter et on note une absence de germe dans l'examen bactériologique. Conclusion L'utilisation correcte du système clos à bouchon hépariné lors des perfusions peut réduire et prévenir de façon significative les complications liées au cathéter notamment l'occlusion par thrombus, leur migration et la survenue de l'infection. PMID:26600900

  4. Les médicaments à libération prolongée pour les enfants et les adolescents ayant un trouble de déficit de l’attention avec hyperactivité

    PubMed Central

    Feldman, M; Bélanger, S

    2009-01-01

    Le trouble de déficit de l’attention avec hyperactivité (TDAH) touche un enfant canadien sur 20 et s’associe à un dossier scolaire et à un registre d’emploi défavorables, à des taux élevés de blessures et de consommation de drogues ou d’alcool, à des relations interpersonnelles médiocres, à de mauvaises issues en santé mentale et à une qualité de vie insatisfaisante. Des essais contrôlés démontrent que les médica-ments sont efficaces pour traiter les symptômes de TDAH tandis que des études d’observation indiquent qu’ils s’associent à de meilleures issues sociales et de santé. De nombreuses familles, ainsi que leur médecin traitant, préfèrent les médicaments à libération prolongée (LP) contre le TDAH aux médicaments à libération immédiate (LI) et à action brève. Toutefois, les préparations à LP sont souvent inabor-dables pour les familles, dont un nombre disproportionné fait partie de la strate à faible statut socioéconomique. Le présent document de principes vise à proposer une évaluation critique des données probantes sur l’efficacité relative des médicaments à LP par rapport aux médicaments à LI ainsi que des recommandations au sujet de leur utilisation convenable dans le traitement du TDAH. Lorsque les médicaments sont indiqués, il faut envisager d’utiliser des préparations à LP comme traitement de première intention contre le TDAH parce qu’elles sont plus efficaces et moins susceptibles d’être détournées. Les futures recherches et les analyses coûts-avantages doivent tenir compte à la fois de l’efficacité de médicaments dans des études contrôlées et de leur efficacité clinique en situation réelle ainsi que du potentiel de détournement et de mésusage de ces médicaments. L’industrie, les sociétés d’assurance et le gouvernement doivent collaborer pour rendre ces médicaments accessibles à tous les enfants et adolescents ayant un TDAH.

  5. HEGRA Experiment

    NASA Astrophysics Data System (ADS)

    Murdin, P.

    2000-11-01

    The La Palma cosmic-ray observatory HEGRA (High-Energy Gamma-Ray Astronomy) is an air shower experiment, located at the OBSERVATORIO DEL ROQUE DE LOS MUCHACHOS (2200 m above sea level, 28.75°N, 17.89°W) on the Canary island of La Palma, and is operated by institutes from Germany, Spain and Yerevan....

  6. Aesthetic experience.

    PubMed

    Sirois, François J

    2008-02-01

    An initial clinical question, 'Why does an analysand talk about his/her relationship with an aesthetic object?' opens an investigation into the nature of aesthetic experience. Three principal aspects of the psychoanalytic approach are presented: sublimation, a Freudian concept concerning the vicissitudes of the drives; reparation, a Kleinian concept linked to depressive anxiety; and transformation, a concept of object-relations theory about primitive ego-states. The article discusses the psychic function of aesthetic feelings in mastering anxiety as related to ego, id and superego. The transformation of the experience of passivity is a common link underlying these aspects. Such transformation relies on tolerating ambiguous and contrary feelings within the self, fostered by contact with an aesthetic object. This balance can, however, be upset: two excessive forms of aesthetic experience ensue, namely, fascination and bewitchment. The first belongs to the experience of awe; the second can lead to claustrophobic anxiety. The initial clinical question requires an elaboration of aesthetic transference, a variant of the narcissistic transference, whereby the analysand invites the analyst to share his/her internal state as a common unspoken object.

  7. Remote sensing with spaceborne synthetic aperture imaging radars: A review

    NASA Technical Reports Server (NTRS)

    Cimino, J. B.; Elachi, C.

    1983-01-01

    A review is given of remote sensing with Spaceborne Synthetic Aperture Radars (SAR's). In 1978, a spaceborne SA was flown on the SEASAT satellite. It acquired high resulution images over many regions in North America and the North Pacific. The acquired data clearly demonstrate the capability of spaceborne SARs to: image and track polar ice floes; image ocean surface patterns including swells, internal waves, current boundaries, weather boundaries and vessels; and image land features which are used to acquire information about the surface geology and land cover. In 1981, another SAR was flown on the second shuttle flight. This Shuttle Imaging Radar (SIR-A) acquired land and ocean images over many areas around the world. The emphasis of the SIR-A experiment was mainly toward geologic mapping. Some of the key results of the SIR-A experiment are given.

  8. Effets de l'interaction avec l'oxygène sur le comportement de couches semi-conductrices de ZnO, SnO{2} et CdSe

    NASA Astrophysics Data System (ADS)

    Ain-Souya, A.; Ghers, M.; Haddad, A.; Tebib, W.; Rehamnia, R.; Messsalhi, A.; Bounouala, M.; Djouama, M. C.

    2005-05-01

    Les propriétés superficielles des matériaux solides diffèrent de celles du volume. A la surface, des défauts de différentes natures peuvent être présents. Ils permettent à la surface d'être interactive avec le milieu ambiant. Les multiples interactions entre les états de surface et des éléments du milieu extérieur peuvent modifier les propriétés superficielles. Ce travail étudie la régénération de couches semi-conductrices après adsorption isotherme d'oxygène à différentes températures effectuées entre 20 ° C et 300 ° C. Les matériaux qui ont servi à l'étude sont des couches de ZnO, SnO{2} et CdSe. Celles de CdSe ont été obtenues par co-évaporation, sous vide, de cadmium et de sélénium. Les échantillons de ZnO et SnO{2} ont été élaborés par oxydation, à des températures respectives de 450 ° C et 200 ° , de Zn et Sn déposés par électrolyse et par évaporation sous vide. Les matériaux évaporés ont été déposés sur des plaquettes en verre, les autres ont été électrodéposés sur des substrats métalliques. Les variations des propriétés électriques des couches ont été suivies par mesure de leur résistance électrique superficielle R. Les courbes LogR = f (103 /T (K)), relevées sous vide à différentes températures, sont caractéristiques d'un comportement de semi-conducteur. Des essais d'adsorption d'O{2} à différentes températures montrent des variations considérables de R. En effet, la chimisorption forte d'un gaz par une surface semi-conductrice est telle que l'échange électronique entre adsorbant et adsorbat provoque la formation d'une zone de charge d'espace modifiant la conduction superficielle. Les résultats mettent en évidence des domaines de température de plus haute sensibilité à l'oxygène. Pour le CdSe, certaines désorptions isothermes ont été suffisantes pour une régénération totale des échantillons. Les couches de ZnO ont souvent nécessité des désorptions programm

  9. Soil experiment

    NASA Technical Reports Server (NTRS)

    Hutcheson, Linton; Butler, Todd; Smith, Mike; Cline, Charles; Scruggs, Steve; Zakhia, Nadim

    1987-01-01

    An experimental procedure was devised to investigate the effects of the lunar environment on the physical properties of simulated lunar soil. The test equipment and materials used consisted of a vacuum chamber, direct shear tester, static penetrometer, and fine grained basalt as the simulant. The vacuum chamber provides a medium for applying the environmental conditions to the soil experiment with the exception of gravity. The shear strength parameters are determined by the direct shear test. Strength parameters and the resistance of soil penetration by static loading will be investigated by the use of a static cone penetrometer. In order to conduct a soil experiment without going to the moon, a suitable lunar simulant must be selected. This simulant must resemble lunar soil in both composition and particle size. The soil that most resembles actual lunar soil is basalt. The soil parameters, as determined by the testing apparatus, will be used as design criteria for lunar soil engagement equipment.

  10. XMASS experiment

    SciTech Connect

    Abe, Ko

    2016-06-21

    XMASS is a single phase liquid xenon scintillator detector. The project is designed for multi purposes, dark matter, neutrinoless double beta decay and {sup 7}Be/pp solar neutrino. As the first step of project, XMASS-I detector with 832 kg sensitive volume started operation from Dec. 2010. In this paper, recent obtained physics results from commissioning data, refurbishment of detector and future step of experiment are presented.

  11. SANE experiment

    SciTech Connect

    H. Baghdasaryan, SANE Collaboration

    2012-04-01

    The Spin Asymmetries of the Nucleon Experiment (SANE) is a measurement of parallel and near-perpendicular double spin asymmetries in an inclusive electron scattering. The main goal of the experiment was to measure A{sub {parallel}} and A{sub 80} and extract the spin asymmetries of the proton A{sub 1}{sup p}, A{sub 2}{sup p} and spin structure functions g{sub 1}{sup p} and g{sub 2}{sup p}. Using the Thomas Jefferson National Accelerator Facility's polarized electron beam and the University of Virginia's polarized frozen ammonia ({sup 14}NH{sub 3}) target in Hall C, the experiment ran in 2009, collecting data in a Q{sup 2} region from 2.5 to 6.5 GeV{sup 2} and between Bjorken x of 0.3 to 0.8. Particle detection was accomplished using the Big Electron Telescope Array (BETA), a novel non-magnetic detector. This talk will address the progress of the analysis designed to extract the proton spin asymmetries and structure functions. Preliminary results will be presented.

  12. Transport Experiments

    NASA Technical Reports Server (NTRS)

    Hall, Timothy M.; Wuebbles, Donald J.; Boering, Kristie A.; Eckman, Richard S.; Lerner, Jean; Plumb, R. Alan; Rind, David H.; Rinsland, Curtis P.; Waugh, Darryn W.; Wei, Chu-Feng

    1999-01-01

    MM II defined a series of experiments to better understand and characterize model transport and to assess the realism of this transport by comparison to observations. Measurements from aircraft, balloon, and satellite, not yet available at the time of MM I [Prather and Remsberg, 1993], provide new and stringent constraints on model transport, and address the limits of our transport modeling abilities. Simulations of the idealized tracers the age spectrum, and propagating boundary conditions, and conserved HSCT-like emissions probe the relative roles of different model transport mechanisms, while simulations of SF6 and C02 make the connection to observations. Some of the tracers are related, and transport diagnostics such as the mean age can be derived from more than one of the experiments for comparison to observations. The goals of the transport experiments are: (1) To isolate the effects of transport in models from other processes; (2) To assess model transport for realistic tracers (such as SF6 and C02) for comparison to observations; (3) To use certain idealized tracers to isolate model mechanisms and relationships to atmospheric chemical perturbations; (4) To identify strengths and weaknesses of the treatment of transport processes in the models; (5) To relate evaluated shortcomings to aspects of model formulation. The following section are included:Executive Summary, Introduction, Age Spectrum, Observation, Tropical Transport in Models, Global Mean Age in Models, Source-Transport Covariance, HSCT "ANOY" Tracer Distributions, and Summary and Conclusions.

  13. Transport Experiments

    NASA Technical Reports Server (NTRS)

    Hall, Timothy M.; Wuebbles, Donald J.; Boering, Kristie A.; Eckman, Richard S.; Lerner, Jean; Plumb, R. Alan; Rind, David H.; Rinsland, Curtis P.; Waugh, Darryn W.; Wei, Chu-Feng

    1999-01-01

    MM II defined a series of experiments to better understand and characterize model transport and to assess the realism of this transport by comparison to observations. Measurements from aircraft, balloon, and satellite, not yet available at the time of MM I [Prather and Remsberg, 1993], provide new and stringent constraints on model transport, and address the limits of our transport modeling abilities. Simulations of the idealized tracers the age spectrum, and propagating boundary conditions, and conserved HSCT-like emissions probe the relative roles of different model transport mechanisms, while simulations of SF6 and C02 make the connection to observations. Some of the tracers are related, and transport diagnostics such as the mean age can be derived from more than one of the experiments for comparison to observations. The goals of the transport experiments are: (1) To isolate the effects of transport in models from other processes; (2) To assess model transport for realistic tracers (such as SF6 and C02) for comparison to observations; (3) To use certain idealized tracers to isolate model mechanisms and relationships to atmospheric chemical perturbations; (4) To identify strengths and weaknesses of the treatment of transport processes in the models; (5) To relate evaluated shortcomings to aspects of model formulation. The following section are included:Executive Summary, Introduction, Age Spectrum, Observation, Tropical Transport in Models, Global Mean Age in Models, Source-Transport Covariance, HSCT "ANOY" Tracer Distributions, and Summary and Conclusions.

  14. Space transportation system flight 2 OSTA-1 scientific payload data management plan

    NASA Technical Reports Server (NTRS)

    1981-01-01

    The Shuttle Imaging Radar-A (SIR-A), Shuttle Multispectral Infrared Radiometer (SMIRR), Future Identification and Location Experiment (FILE), Measurement of Air Pollution from Satellites (MAPS), Ocean Color Experiment (OCE), the Night/Day Optical Survey of Lightning (NOSL), and the Heflex Bioengineering Test (HBT) experiments are described.

  15. Chemistry Experiments

    NASA Technical Reports Server (NTRS)

    Brasseur, Guy; Remsberg, Ellis; Purcell, Patrick; Bhatt, Praful; Sage, Karen H.; Brown, Donald E.; Scott, Courtney J.; Ko, Malcolm K. W.; Tie, Xue-Xi; Huang, Theresa

    1999-01-01

    The purpose of the chemistry component of the model comparison is to assess to what extent differences in the formulation of chemical processes explain the variance between model results. Observed concentrations of chemical compounds are used to estimate to what degree the various models represent realistic situations. For readability, the materials for the chemistry experiment are reported in three separate sections. This section discussed the data used to evaluate the models in their simulation of the source gases and the Nitrogen compounds (NO(y)) and Chlorine compounds (Cl(y)) species.

  16. Chemistry Experiments

    NASA Technical Reports Server (NTRS)

    Brasseur, Guy; Remsberg, Ellis; Purcell, Patrick; Bhatt, Praful; Sage, Karen H.; Brown, Donald E.; Scott, Courtney J.; Ko, Malcolm K. W.; Tie, Xue-Xi; Huang, Theresa

    1999-01-01

    The purpose of the chemistry component of the model comparison is to assess to what extent differences in the formulation of chemical processes explain the variance between model results. Observed concentrations of chemical compounds are used to estimate to what degree the various models represent realistic situations. For readability, the materials for the chemistry experiment are reported in three separate sections. This section discussed the data used to evaluate the models in their simulation of the source gases and the Nitrogen compounds (NO(y)) and Chlorine compounds (Cl(y)) species.

  17. PASSAGES experiment

    NASA Image and Video Library

    2010-10-19

    ISS025-E-008371 (20 Oct. 2010) --- NASA astronaut Doug Wheelock, Expedition 25 commander, uses Neurospat hardware to perform a science session with the European Space Agency PASSAGES experiment in the Columbus laboratory of the International Space Station. PASSAGES is designed to test how astronauts interpret visual information in weightlessness. It aims at studying the effects of microgravity on the use of the ‘Eye-Height’ strategy for estimating allowed actions in an environment, and whether this could possibly decrease after a long exposure to weightlessness.

  18. Matériaux diélectriques à base de K_2Sr4Nb{10}O_{30} présentant des courbes \\varepsilon'_r = f (T) plates avec de hautes constantes diélectriques

    NASA Astrophysics Data System (ADS)

    Tribotté, B.; Desgardin, G.

    1997-06-01

    Type II ferroelectric ceramics are used in multilayers capacitors with high volume capacitance. Among different specifications concerning the variation of the dielectric constant versus temperature, one of the most restrictive class, the X7R one, allows only a variation of ±15 percent of the 25 ^{circ}C value of the permittivity in the wide range, -55 ^{circ}C to +125 ^{circ}C. Previous investigations have proved the interest to mix the niobate K2Sr4Nb{10}O{30}, with a Tetragonal Tungsten Bronze (TTB) structure, with perovskites as minor agents like Pb(Mg{1/3}Nb{2/3})O3, to obtain flat curves \\varepsilon'_r = f (T) with dielectric constant above 6000. To point out the mechanism leading to such curves, the influence of the introduction of different cations like Mg^{2+} or Pb^{2+} in the TTB structure has been studied. In the present work, we show that K2Sr{4}Nb{10}O{30}-based materials, without the presence of perovskite phase from XRD, can also exhibit \\varepsilon'_r= f (T) curves with a flat profile. Les céramiques ferroélectriques de type II sont couramment utilisées dans les condensateurs multicouches à forte capacité volumique. Parmi différentes classes concernant la variation de la constante diélectrique en fonction de la température, une des plus sévères, la X7R, autorise seulement une variation de ±15% de la capacité par rapport à celle à 25 ^{circ}C dans un large domaine de température, de -55 ^{circ}C à +125 ^{circ}C. Des études récentes ont prouvé l'intérêt de mélanger le niobate K2Sr4Nb{10}O{30}, de structure de type Bronze Quadratique de Tungstène (BQT), avec des pérovskites en faible proportion comme Pb(Mg{1/3}Nb{2/3})O3, pour obtenir des courbes plates \\varepsilon'_r = f (T), correspondant à des constantes moyennes superieures à 6000. Pour mettre en évidence le mécanisme conduisant à de telles courbes, nous avons étudié l'influence de l'introduction de différents cations comme Mg^{2+} ou Pb^{2+} dans la structure

  19. JSC Shuttle Mission Simulator (SMS) visual system payload bay video image

    NASA Technical Reports Server (NTRS)

    1981-01-01

    This video image is of the STS-2 Columbia, Orbiter Vehicle (OV) 102, payload bay (PLB) showing the Office of Space Terrestrial Applications 1 (OSTA-1) pallet (Shuttle Imaging Radar A (SIR-A) antenna (left) and SIR-A recorder, Shuttle Multispectral Infrared Radiometer (SMIRR), Feature Identification Location Experiment (FILE), Measurement of Air Pollution for Satellites (MAPS) (right)). The image is used in JSC's Fixed Based (FB) Shuttle Mission Simulator (SMS). It is projected inside the FB-SMS crew compartment during mission simulation training. The FB-SMS is located in the Mission Simulation and Training Facility Bldg 5.

  20. Intérêt de l'inspection visuelle à l'acide acétique et au soluté de Lugol avec colposcope dans le dépistage des lésions du col utérin au Gabon

    PubMed Central

    Mpiga, Édith; Ivanga, Mahinè; Koumakpayi, Ismaël Hervé; Engohan-Aloghe, Corinne; Ankély, Junie Chansi; Belembaogo, Ernest; Meye, Jean-François

    2015-01-01

    Introduction Au Gabon, le dépistage des lésions précancéreuses et cancéreuses du col de l'utérus n'est pas systématique. La vulgarisation de ce dépistage suppose l'utilisation d'un test efficace et adapté aux réalités locales. Méthodes L'objectif de cette étude était de comparer les performances du frottis cervico-vaginal (FCV) conventionnel et de l'inspection visuelle à l'acide acétique (IVA) et au soluté de Lugol (IVL) couplée à la colposcopie, dans la détection des lésions du col utérin au Gabon. Des tests IVA/IVL et FCV ont été effectués chez 309 femmes gabonaises âgées de 18 à 75 ans. Des biopsies ont été réalisées en cas de résultat positif. Résultats 5 cancers épidermoïdes (1,6%) et 4 lésions précancéreuses (1,3%) ont été confirmées par l'histologie. L'IVA/IVL a présenté une meilleure sensibilité (100%) que le FCV (89%). Toutefois, le FCV est apparu plus spécifique (100% versus 92%). Avec une valeur prédictive (VP) négative de 100%, l'IVA/IVL a permis d'exclure avec certitude la présence de cancer du col lorsque le résultat était négatif, contrairement au FCV (92%). L'IVA/IVL et le FCV ont présenté des VP positives respectivement de 90% et 100%. Conclusion Cette étude montre que l'IVA/IVL avec colposcope couplée à l'histologie en cas de résultat positif apparaît plus performante que le FCV. PMID:26893799

  1. Skylab Workshop experience in experiment accommodation

    NASA Technical Reports Server (NTRS)

    Hanlon, W. H.; Hassel, R. R.

    1974-01-01

    This paper examines the experiment support facilities available from the Orbital Workshop (OWS) module of the Skylab. Experiments and associated support provisions have been selected and described to illustrate the various accommodations and degree of complexities involved in the integration of these experiments into the Workshop. The interfaces described start with the simple and proceed to the complex. On the basis of the experience gained in integrating the experiments into the Workshop, conclusions are drawn and suggestions are made on ways to facilitate future experiment operations and at the same time simplify and reduce the cost of integration efforts.

  2. Sleep Monitoring Experiment - Skylab Experiment M133

    NASA Technical Reports Server (NTRS)

    1970-01-01

    This 1970 photograph shows equipment for the Skylab's Sleep Monitoring Experiment (M133), a medical evaluation designed to objectively determine the amount and quality of crewmembers' inflight sleep. The experiment monitored and recorded electroencephalographic (EEG) and electrooculographic (EOG) activity during astronauts' sleep periods. One of the astronauts was selected for this experiment and wore a fitted cap during his sleep periods. The Marshall Space Flight Center had program management responsibility for the development of Skylab hardware and experiments.

  3. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1984

    1984-01-01

    Describes: (1) experiments using a simple phonocardiograph; (2) radioactivity experiments involving a VELA used as a ratemeter; (3) a 25cm continuously operating Foucault pendulum; and (4) camera control of experiments. Descriptions of equipment needed are provided when applicable. (JN)

  4. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1984

    1984-01-01

    Describes: (1) experiments using a simple phonocardiograph; (2) radioactivity experiments involving a VELA used as a ratemeter; (3) a 25cm continuously operating Foucault pendulum; and (4) camera control of experiments. Descriptions of equipment needed are provided when applicable. (JN)

  5. Solar Array Experiment (SAE) Flight Experience

    NASA Technical Reports Server (NTRS)

    Hill, H. C.; Young, L. E.; Turner, G. F.

    1985-01-01

    The space flight testing of a large, flat, flexible panel solar array is examined. The experiment objectives are: to demonstrate the functional operational of the wind deployment and packaging system; Electrical performance; Thermal performance; and dynamic performance. A complete description of the experiment and the flight results are given.

  6. The User Experience

    ERIC Educational Resources Information Center

    Schmidt, Aaron

    2010-01-01

    User experience (UX) is about arranging the elements of a product or service to optimize how people will interact with it. In this article, the author talks about the importance of user experience and discusses the design of user experiences in libraries. He first looks at what UX is. Then he describes three kinds of user experience design: (1)…

  7. The User Experience

    ERIC Educational Resources Information Center

    Schmidt, Aaron

    2010-01-01

    User experience (UX) is about arranging the elements of a product or service to optimize how people will interact with it. In this article, the author talks about the importance of user experience and discusses the design of user experiences in libraries. He first looks at what UX is. Then he describes three kinds of user experience design: (1)…

  8. Commercial Biomedical Experiments

    NASA Technical Reports Server (NTRS)

    2003-01-01

    Experiments to seek solutions for a range of biomedical issues are at the heart of several investigations that will be hosted by the Commercial Instrumentation Technology Associates (ITA), Inc. Biomedical Experiments (CIBX-2) payload. CIBX-2 is unique, encompassing more than 20 separate experiments including cancer research, commercial experiments, and student hands-on experiments from 10 schools as part of ITA's ongoing University Among the Stars program. Valerie Cassanto of ITA checks the Canadian Protein Crystallization Experiment (CAPE) carried by STS-86 to Mir in 1997. The experiments are sponsored by NASA's Space Product Development Program (SPD).

  9. Commercial Biomedical Experiments Payload

    NASA Technical Reports Server (NTRS)

    2003-01-01

    Experiments to seek solutions for a range of biomedical issues are at the heart of several investigations that will be hosted by the Commercial Instrumentation Technology Associates (ITA), Inc. The biomedical experiments CIBX-2 payload is unique, encompassing more than 20 separate experiments including cancer research, commercial experiments, and student hands-on experiments from 10 schools as part of ITA's ongoing University Among the stars program. Here, Astronaut Story Musgrave activates the CMIX-5 (Commercial MDA ITA experiment) payload in the Space Shuttle mid deck during the STS-80 mission in 1996 which is similar to CIBX-2. The experiments are sponsored by NASA's Space Product Development Program (SPD).

  10. Commercial Biomedical Experiments

    NASA Technical Reports Server (NTRS)

    2003-01-01

    Experiments to seek solutions for a range of biomedical issues are at the heart of several investigations that will be hosted by the Commercial Instrumentation Technology Associates (ITA), Inc. Biomedical Experiments (CIBX-2) payload. CIBX-2 is unique, encompassing more than 20 separate experiments including cancer research, commercial experiments, and student hands-on experiments from 10 schools as part of ITA's ongoing University Among the Stars program. Valerie Cassanto of ITA checks the Canadian Protein Crystallization Experiment (CAPE) carried by STS-86 to Mir in 1997. The experiments are sponsored by NASA's Space Product Development Program (SPD).

  11. Commercial Biomedical Experiments Payload

    NASA Technical Reports Server (NTRS)

    2003-01-01

    Experiments to seek solutions for a range of biomedical issues are at the heart of several investigations that will be hosted by the Commercial Instrumentation Technology Associates (ITA), Inc. The biomedical experiments CIBX-2 payload is unique, encompassing more than 20 separate experiments including cancer research, commercial experiments, and student hands-on experiments from 10 schools as part of ITA's ongoing University Among the stars program. Here, Astronaut Story Musgrave activates the CMIX-5 (Commercial MDA ITA experiment) payload in the Space Shuttle mid deck during the STS-80 mission in 1996 which is similar to CIBX-2. The experiments are sponsored by NASA's Space Product Development Program (SPD).

  12. Adaptive Structures Flight Experiments

    NASA Technical Reports Server (NTRS)

    Martin, Maurice

    1992-01-01

    The topics are presented in viewgraph form and include the following: adaptive structures flight experiments; enhanced resolution using active vibration suppression; Advanced Controls Technology Experiment (ACTEX); ACTEX program status; ACTEX-2; ACTEX-2 program status; modular control patch; STRV-1b Cryocooler Vibration Suppression Experiment; STRV-1b program status; Precision Optical Bench Experiment (PROBE); Clementine Spacecraft Configuration; TECHSAT all-composite spacecraft; Inexpensive Structures and Materials Flight Experiment (INFLEX); and INFLEX program status.

  13. Adaptive structures flight experiments

    NASA Astrophysics Data System (ADS)

    Martin, Maurice

    The topics are presented in viewgraph form and include the following: adaptive structures flight experiments; enhanced resolution using active vibration suppression; Advanced Controls Technology Experiment (ACTEX); ACTEX program status; ACTEX-2; ACTEX-2 program status; modular control patch; STRV-1b Cryocooler Vibration Suppression Experiment; STRV-1b program status; Precision Optical Bench Experiment (PROBE); Clementine Spacecraft Configuration; TECHSAT all-composite spacecraft; Inexpensive Structures and Materials Flight Experiment (INFLEX); and INFLEX program status.

  14. Exclusive Electroproduction of meson rho on the nucleon Virtualite Intermediate With the CLAS Detector at Jlab; Electroproduction Exclusive de meson rho sur le nucleon Virtualite Intermediaire Avec le Detecteur CLAS at Jlab

    SciTech Connect

    Hadjidakis, Cynthia

    2002-12-17

    This report presents the exclusive rho0 meson electroproduction on the nucleon at intermediate square momentum transfers Q2 (1.5 < Q2 < 3 GeV2) and above the resonance region. The experiment has been taken place at the Jefferson laboratory with the CLAS detector, with a 4.2 GeV beam energy on a hydrogen target in the February-March 1999 period. They present the results and in particular the L/T separated cross sections. This experimentally unexplored domain experimentally is at the intersection between traditional ''soft'' hadronic physics models (VDM and Regge inspired models) and ''hard'' pQCD inspired approaches (recently introduced Generalized Parton Distribution). They discuss both approaches and their domain of validity.

  15. Étude de l'effet du magnésium sur l'oxydation à haute température (1100circC-1200circC) d'un alliage FeCrAl avec misch-métal

    NASA Astrophysics Data System (ADS)

    El Messki, S.; Buscail, H.; Caudron, E.; Cueff, R.; Riffard, F.; Issartel, C.; Perrier, S.

    2004-11-01

    L'étude de l'oxydation isotherme et cyclique à 1100circC et 1200circC sous air d'un alliage FeCrAl-Ce,La a été effectuée en tenant compte du magnésium présent en tant qu'impureté dans l'alliage. L'analyse par diffraction des rayons X in situ a montré que la phase majoritaire qui constitue la couche d'oxyde est l'alumine-α avec une phase minoritaire MgAl{2}O{4} qui commence à apparaître dés la deuxième heure d'oxydation. L'analyse EDXS des sections transversales a montré que le magnésium est localisé à la surface externe de la couche d'oxyde. Ceci conduit à la formation de porosité à l'interface externe sans toutefois affecter la partie interne de la couche qui reste compact ce qui explique que nous avons toujours une couche montrant un caractère protecteur à haute température.

  16. Radiometer experiment for the aeroassist flight experiment

    NASA Astrophysics Data System (ADS)

    Davy, W. C.; Park, C.; Arnold, J. O.; Balakrishnan, A.

    1985-06-01

    A forthcoming NASA flight experiment is described that provides an opportunity to obtain a large base of radiometric data for high-altitude, high-velocity thermochemically nonequilibrated-flow conditions. As a preliminary to the design of a radiometer for this experiment, an approximate method for predicting both equilibrium and nonequilibrium radiative surface fluxes is described. Spectral results for one trajectory state, a velocity of 10 km/sec at an altitude of 85 km, are presented. These results are then used to develop some of the instrument parameters that will be needed for designing of the three genre of radiometers that are proposed for this experiment.

  17. Biomedical experiments. Part A: Biostack experiment

    NASA Technical Reports Server (NTRS)

    Buecker, H.; Horneck, G.; Reinholz, E.; Scheuermann, W.; Ruether, W.; Graul, E. H.; Planel, H.; Soleilhavoup, J. P.; Cuer, P.; Kaiser, R.

    1972-01-01

    The biostack experiment is described which was designed to study the biologic effects of individual heavy nuclei of galactic cosmic radiation during space flight outside the magnetosphere of the earth. Specifically, the biostack experiment was designed to promote research on the effects of high energy/high Z particles of galactic cosmic radiation on a broad spectrum of biologic systems, from the molecular to the highly organized and developed forms of life. The experiment was considered unique and scientifically meritorious because of its potential yield of information - currently unavailable on earth - on the interaction of biologic systems with the heavy particles of galactic cosmic radiation.

  18. The ERASMUS experiment archive

    NASA Astrophysics Data System (ADS)

    Isakeit, Dieter; Sabbatini, Massimo; Carey, William

    2005-08-01

    The Erasmus Experiment Archive is an electronic database, accessible through the Internet, that collects in a single reference repository scientific, technical and operational information regarding the experiments performed in the experiment facilities which fall under the responsibility of the ESA Directorate of Human Spaceflight, Microgravity and Exploration. The archive is operated, filled with content and kept up-to-date by the Erasmus User Centre. which forms part of the Directorate. The archive shares its records and is interoperable with similar experiment archives of the partner agencies NASA USA) and JAXA (Japan) through a mutually agreed standard for experiment records called the International Distributed Experiment Archive (IDEA).

  19. STEP Experiment Requirements

    NASA Technical Reports Server (NTRS)

    Brumfield, M. L. (Compiler)

    1984-01-01

    A plan to develop a space technology experiments platform (STEP) was examined. NASA Langley Research Center held a STEP Experiment Requirements Workshop on June 29 and 30 and July 1, 1983, at which experiment proposers were invited to present more detailed information on their experiment concept and requirements. A feasibility and preliminary definition study was conducted and the preliminary definition of STEP capabilities and experiment concepts and expected requirements for support services are presented. The preliminary definition of STEP capabilities based on detailed review of potential experiment requirements is investigated. Topics discussed include: Shuttle on-orbit dynamics; effects of the space environment on damping materials; erectable beam experiment; technology for development of very large solar array deployers; thermal energy management process experiment; photovoltaic concentrater pointing dynamics and plasma interactions; vibration isolation technology; flight tests of a synthetic aperture radar antenna with use of STEP.

  20. Experiments and Calculations.

    ERIC Educational Resources Information Center

    Siddons, J. C.

    1982-01-01

    Discusses several science experiments/activities and their associated measurements. These include a simple projectile activity, cartesian diver (used to measure altitude and atmospheric pressure), experiment demonstrating atmospheric pressure, and activities using a stroboscope, and electrometer. (JN)

  1. Challenging Students with Experiments.

    ERIC Educational Resources Information Center

    Ambruso, Mark D.

    2003-01-01

    Supports the use of a science experiment option in the high school curriculum to enhance student learning. Presents a science experiment rubric and connects the use of science projects with standards. (DDR)

  2. Neutrino oscillation experiments

    NASA Astrophysics Data System (ADS)

    Nakamura, Kenzo

    2000-12-01

    The present status of neutrino oscillation experiments and prospects of forthcoming experiments are reviewed. Particular emphasis is placed on the recent results from Super-Kamiokande atmospheric neutrino and solar neutrino observations. .

  3. Experiments and Calculations.

    ERIC Educational Resources Information Center

    Siddons, J. C.

    1982-01-01

    Discusses several science experiments/activities and their associated measurements. These include a simple projectile activity, cartesian diver (used to measure altitude and atmospheric pressure), experiment demonstrating atmospheric pressure, and activities using a stroboscope, and electrometer. (JN)

  4. CFE experiment In JEM

    NASA Image and Video Library

    2011-10-07

    ISS029-E-020901 (7 Oct. 2011) --- NASA astronaut Mike Fossum, Expedition 29 commander, points to the Capillary Flow Experiment (CFE) experiment in the Kibo laboratory of the International Space Station.

  5. Experiments in Magnetohydrodynamics

    ERIC Educational Resources Information Center

    Rayner, J. P.

    1970-01-01

    Describes three student experiments in magnetohydrodynamics (MHD). In these experiments, it was found that the electrical conductivity of the local water supply was sufficient to demonstrate effectively some of the features of MHD flowmeters, generators, and pumps. (LC)

  6. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1984

    1984-01-01

    Describes apparatus needed and instructions for conducting four experiments. Experiments focus on light waves, measurement of contact resistance, demonstration of longitudinal waves, and a simple method of measuring the refractive indices of transparent plates and liquids. (JM)

  7. Experiments in Magnetohydrodynamics

    ERIC Educational Resources Information Center

    Rayner, J. P.

    1970-01-01

    Describes three student experiments in magnetohydrodynamics (MHD). In these experiments, it was found that the electrical conductivity of the local water supply was sufficient to demonstrate effectively some of the features of MHD flowmeters, generators, and pumps. (LC)

  8. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1984

    1984-01-01

    Describes apparatus needed and instructions for conducting four experiments. Experiments focus on light waves, measurement of contact resistance, demonstration of longitudinal waves, and a simple method of measuring the refractive indices of transparent plates and liquids. (JM)

  9. The ITALSAT experiment

    NASA Technical Reports Server (NTRS)

    Paraboni, A.

    1989-01-01

    Some information is given on the ITALSAT millimetric waves propagation experiment, which is to be conducted with the ITALSAT satellite, whose launch is foreseen for the middle of 1990. The purpose of the experiment is one of experimenting with advanced technologies and techniques employing the 20/30 GHz bands in wideband telecommunications. Among the most qualified features of this system are the multispot antenna and the exchange function performed directly onboard. Details of the experiment are given.

  10. Experiences with Launch Vehicles

    NASA Technical Reports Server (NTRS)

    Dumbacher, Daniel L.

    2006-01-01

    The presentation "NASA Experience with Launch Vehicles" is a compilation of Mr. Dumbacher's career experiences with the Space Shuttle Program, the Delta - Clipper Experimental flight test project, the X-33 demonstrator project, and recent experiences with the Orbital Spaceplane Program agd the current NASA effort on Exploration Launch Systems. Mr. Dumbacher will discuss his personal experiences and provide lessons learned from each program. The accounts provided by Mr. Dumbacher are his own and do not necessarily represent the official NASA position.

  11. ACTS Aeronautical Experiments

    NASA Technical Reports Server (NTRS)

    Agan, Martin J.; Nakamura, Daniel I.; Campbell, Alan D.; Sternowski, Robert H.; Whiting, Wendy A.; Shameson, Leon

    1996-01-01

    This paper discusses a series of aeronautical experiments that utilize the advanced communication technology satellite (ACTS). As part of the ongoing effort to investigate commercial applications of ACTS technologies, NASA's Jet Propulsion Laboratory and various industry/government partners have developed a series of experiments that utilize the ACTS mobile terminal (AMT) and the broadband aeronautical terminal to investigate aeronautical uses of the ACTS. This paper discusses these experiments including the experiment configurations, technologies, results and future implications.

  12. ACTS Aeronautical Experiments

    NASA Technical Reports Server (NTRS)

    Agan, Martin J.; Nakamura, Daniel I.; Campbell, Alan D.; Sternowski, Robert H.; Whiting, Wendy A.; Shameson, Leon

    1996-01-01

    This paper discusses a series of aeronautical experiments that utilize the advanced communication technology satellite (ACTS). As part of the ongoing effort to investigate commercial applications of ACTS technologies, NASA's Jet Propulsion Laboratory and various industry/government partners have developed a series of experiments that utilize the ACTS mobile terminal (AMT) and the broadband aeronautical terminal to investigate aeronautical uses of the ACTS. This paper discusses these experiments including the experiment configurations, technologies, results and future implications.

  13. The Experiment Factory: Standardizing Behavioral Experiments

    PubMed Central

    Sochat, Vanessa V.; Eisenberg, Ian W.; Enkavi, A. Zeynep; Li, Jamie; Bissett, Patrick G.; Poldrack, Russell A.

    2016-01-01

    The administration of behavioral and experimental paradigms for psychology research is hindered by lack of a coordinated effort to develop and deploy standardized paradigms. While several frameworks (Mason and Suri, 2011; McDonnell et al., 2012; de Leeuw, 2015; Lange et al., 2015) have provided infrastructure and methods for individual research groups to develop paradigms, missing is a coordinated effort to develop paradigms linked with a system to easily deploy them. This disorganization leads to redundancy in development, divergent implementations of conceptually identical tasks, disorganized and error-prone code lacking documentation, and difficulty in replication. The ongoing reproducibility crisis in psychology and neuroscience research (Baker, 2015; Open Science Collaboration, 2015) highlights the urgency of this challenge: reproducible research in behavioral psychology is conditional on deployment of equivalent experiments. A large, accessible repository of experiments for researchers to develop collaboratively is most efficiently accomplished through an open source framework. Here we present the Experiment Factory, an open source framework for the development and deployment of web-based experiments. The modular infrastructure includes experiments, virtual machines for local or cloud deployment, and an application to drive these components and provide developers with functions and tools for further extension. We release this infrastructure with a deployment (http://www.expfactory.org) that researchers are currently using to run a set of over 80 standardized web-based experiments on Amazon Mechanical Turk. By providing open source tools for both deployment and development, this novel infrastructure holds promise to bring reproducibility to the administration of experiments, and accelerate scientific progress by providing a shared community resource of psychological paradigms. PMID:27199843

  14. The Experiment Factory: Standardizing Behavioral Experiments.

    PubMed

    Sochat, Vanessa V; Eisenberg, Ian W; Enkavi, A Zeynep; Li, Jamie; Bissett, Patrick G; Poldrack, Russell A

    2016-01-01

    The administration of behavioral and experimental paradigms for psychology research is hindered by lack of a coordinated effort to develop and deploy standardized paradigms. While several frameworks (Mason and Suri, 2011; McDonnell et al., 2012; de Leeuw, 2015; Lange et al., 2015) have provided infrastructure and methods for individual research groups to develop paradigms, missing is a coordinated effort to develop paradigms linked with a system to easily deploy them. This disorganization leads to redundancy in development, divergent implementations of conceptually identical tasks, disorganized and error-prone code lacking documentation, and difficulty in replication. The ongoing reproducibility crisis in psychology and neuroscience research (Baker, 2015; Open Science Collaboration, 2015) highlights the urgency of this challenge: reproducible research in behavioral psychology is conditional on deployment of equivalent experiments. A large, accessible repository of experiments for researchers to develop collaboratively is most efficiently accomplished through an open source framework. Here we present the Experiment Factory, an open source framework for the development and deployment of web-based experiments. The modular infrastructure includes experiments, virtual machines for local or cloud deployment, and an application to drive these components and provide developers with functions and tools for further extension. We release this infrastructure with a deployment (http://www.expfactory.org) that researchers are currently using to run a set of over 80 standardized web-based experiments on Amazon Mechanical Turk. By providing open source tools for both deployment and development, this novel infrastructure holds promise to bring reproducibility to the administration of experiments, and accelerate scientific progress by providing a shared community resource of psychological paradigms.

  15. The Concerned Observer Experiment.

    ERIC Educational Resources Information Center

    Rabiger, Michael

    1991-01-01

    Describes a classroom experiment--the "concerned observer" experiment--for production students that dramatizes basic film language by relating it to several levels of human observation. Details the experiment's three levels, and concludes that film language mimics wide-ranging states of human emotion and ideological persuasion. (PRA)

  16. Labor Market Experiment.

    ERIC Educational Resources Information Center

    Haupert, Michael J.

    1996-01-01

    Describes a class experiment where students search a hypothetical job market for jobs paying wages in a known range but with an unknown wage distribution. The experiment is divided into three "trials", each one introducing different variables (unemployment insurance, search costs, and recession). Includes experiment instructions and a…

  17. A Mastery Learning Experiment.

    ERIC Educational Resources Information Center

    Anderson, Stephen A.; And Others

    Yale Public Schools (Yale, Michigan) conducted a field experiment in implementing mastery learning. The purpose of the experiment was to provide a hands-on experience for teachers in the implementation of mastery learning and to use students as their own controls in order to compare the results of the implementation of mastery learning both in…

  18. NASTRAN: Users' experiences

    NASA Technical Reports Server (NTRS)

    1973-01-01

    The proceedings of a conference on NASA Structural Analysis (NASTRAN) to analyze the experiences of users of the program are presented. The subjects discussed include the following: (1) statics and buckling, (2) vibrations and dynamics, (3) substructing, (4) new capability, (5) user's experience, and (6) system experience. Specific applications of NASTRAN to spacecraft, aircraft, nuclear power plants, and materials tests are reported.

  19. Graphing from Everyday Experience.

    ERIC Educational Resources Information Center

    Carraher, David; Schliemann, Analucia; Nemirousky, Ricardo

    1995-01-01

    Discusses the importance of teaching grounded in the everyday experiences and concerns of the learners. Studies how people with limited school experience can understand graphs and concludes that individuals with limited academic education can clarify the role of everyday experiences in learning about graphs. (ASK)

  20. Basic Experiments in Telecommunications.

    ERIC Educational Resources Information Center

    Andresen, S. G.

    Presented is a set of laboratory experiments developed to provide students with demonstrations and hands-on experiences with a variety of basic communications methods. These experiments may be used with students who have training in engineering, as well as those with social sciences who have no engineering background. Detailed exercises dealing…

  1. The Concerned Observer Experiment.

    ERIC Educational Resources Information Center

    Rabiger, Michael

    1991-01-01

    Describes a classroom experiment--the "concerned observer" experiment--for production students that dramatizes basic film language by relating it to several levels of human observation. Details the experiment's three levels, and concludes that film language mimics wide-ranging states of human emotion and ideological persuasion. (PRA)

  2. Labor Market Experiment.

    ERIC Educational Resources Information Center

    Haupert, Michael J.

    1996-01-01

    Describes a class experiment where students search a hypothetical job market for jobs paying wages in a known range but with an unknown wage distribution. The experiment is divided into three "trials", each one introducing different variables (unemployment insurance, search costs, and recession). Includes experiment instructions and a…

  3. Using Experience for Learning.

    ERIC Educational Resources Information Center

    Boud, David, Ed.; And Others

    This book contains 13 articles on learning from experience and its relationship to adult learning and adult education. The introductory article, "Understanding Learning from Experience" (Boud, Cohen, Walker), examines five propositions about learning from experience. The following papers are organized into three sections that focus…

  4. Theme: Supervised Experience.

    ERIC Educational Resources Information Center

    Cox, David E.; And Others

    1991-01-01

    Includes "It's Time to Stop Quibbling over the Acronym" (Cox); "Information Rich--Experience Poor" (Elliot et al.); "Supervised Agricultural Experience Selection Process" (Yokum, Boggs); "Point System" (Fraze, Vaughn); "Urban Diversity Rural Style" (Morgan, Henry); "Nonoccupational Supervised Experience" (Croom); "Reflecting Industry" (Miller);…

  5. Theme: Supervised Experience.

    ERIC Educational Resources Information Center

    Cox, David E.; And Others

    1991-01-01

    Includes "It's Time to Stop Quibbling over the Acronym" (Cox); "Information Rich--Experience Poor" (Elliot et al.); "Supervised Agricultural Experience Selection Process" (Yokum, Boggs); "Point System" (Fraze, Vaughn); "Urban Diversity Rural Style" (Morgan, Henry); "Nonoccupational Supervised Experience" (Croom); "Reflecting Industry" (Miller);…

  6. Future Outlook: Experiment

    NASA Astrophysics Data System (ADS)

    Suzuki, Yoichiro

    2008-11-01

    The personal view for the next to the next neutrino detector, the ultimate experiment, is discussed. Considering the size, cost and head winds against the basic science, the ultimate experiment will be the only experiment in the world. Here two such experiments one for the neutrino oscillation and the other for the double beta decay were discussed. The ultimate experiment needs to include a bread and butter science and to have a discovery potential for an unexpected phenomenon. There are many technical challenges and international co-operations are absolutely necessary.

  7. Industrial application experiment series

    NASA Technical Reports Server (NTRS)

    Bluhm, S. A.

    1980-01-01

    The deployment of parabolic dish systems into the industrial sector for the purpose of providing users, suppliers, sponsors, and developers with a realistic assessment of system feasibility in selected near-term industrial applications will be accomplished initially through the industrial module experiment and later through additional experiments involving thermal, electric, and combined thermal and electrical systems. The approach is to progress through steps, from single module to multi-module systems, from thermal-only applications to more complex combined thermal and electric applications. The experience of other solar thermal experiments, particularly those involving parabolic dish hardware, will be utilized to the fullest extent possible in experiment planning and implementation.

  8. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-17

    Michael Kavaya, of the NASA Langley Research Center, a Principal Investigator for the DAWN experiment, looks over data with Jeffrey Beyon during a flight of the NASA DC-8, Tuesday, Aug. 17, 2010, in the Gulf of Mexico. The DAWN experiment, also known as the Doppler Aerosol Wind Lidar, is one of many experiments supporting the Genesis and Rapid Intensification Processes (GRIP) experiment, a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  9. Experiments with Individual Photons

    NASA Astrophysics Data System (ADS)

    Beck, Mark

    2004-05-01

    I describe several different experiments we have performed with individual photons. For example, while well known experiments involving phenomena such as the photoelectric effect and Compton scattering strongly suggest the existence of photons, they do not prove the existence of light quanta. To prove the existence of light quanta one must perform an experiment whose results cannot be explained using classical waves. We have performed such an experiment--it demonstrates the localization of light quanta by showing that a single photon only goes one way when it leaves a beamsplitter [1]. In a second experiment we demonstrate that this single photon will interfere with itself when it transits an interferometer. The experiments have been performed by undergraduates, and the goal of this project is to develop a series of experiments exploring fundamental aspects of quantum mechanics for an undergraduate teaching lab. [1] P. Grangier, G. Roger and A. Aspect, Europhys. Lett. 1, 173 (1986).

  10. Atmospheric variability experiment /AVE II/ pilot experiment

    NASA Technical Reports Server (NTRS)

    Turner, R. E.; Scroggins, J. R.

    1974-01-01

    The Atmospheric Variability Experiment (AVE II) was conducted in May 1974. Rawinsonde releases were made at 54 upper-air stations in two thirds of the eastern U.S. at 3-hr intervals for a 24-hr period. Radar data were obtained from 11 stations located near the center of the observational area, and as many data as possible were collected from the Nimbus 5, NOAA 2, ATS-3, and DMSP satellites. The present paper provides an overview of the experiment and describes how the user community can obtain copies of the data.

  11. Contribution à la modélisation du soudage TIG des tôles minces d'acier austénitique 304L par un modèle source bi-elliptique, avec confrontation expérimentale

    NASA Astrophysics Data System (ADS)

    Aissani, M.; Maza, H.; Belkessa, B.; Maamache, B.

    2005-05-01

    Ce travail contribue dans la modélisation du phénomène du soudage de l'acier inoxydable Austénitique 304L, afin d'étudier le comportement thermique d'un joint de soudure, obtenu par le procédé de soudage à l'arc électrique TIG (Tungsten-Inert-Gas). Le modèle simulant la source d'énergie de soudage, utilise une distribution surfacique Gaussienne du flux de chaleur provenant de l'arc électrique. La forme de cette source est supposée circulaire pour un premier cas et de forme bi-elliptique pour un second cas, tout en procédant à l'évaluation des champs et cycles thermiques à chaque instant, pour déterminer l'étendu des zones à risque, et l'effet de la vitesse de soudage sur ces dernières. Permettant ainsi de remonter par la suite, aux problèmes de contraintes résiduelles et déformations générées dans l'assemblage soudé. L'équation de chaleur régissant le problème est discrétisée par la méthode des volumes finis. Les calculs sont effectués en considérant que les propriétés physiques et thermiques ainsi que les conditions aux limites de convection et rayonnement, sont dépendante de la température. Pour évaluer la précision du modèle, une comparaison avec des mesures expérimentales de température d'un essai de soudage a été effectuée, les résultats indiquent un bon accord.

  12. Délais de prise en charge des syndromes coronariens aigus avec sus-décalage du segment ST à Ouagadougou et facteurs associés à un allongement de ces délais: étude transversale à propos de 43 cas colligés au CHU-Yalgado Ouédraogo

    PubMed Central

    Yameogo, Nobila Valentin; Samadoulougou, André; Millogo, Georges; Kologo, Koudougou Jonas; Kombassere, Karim; Toguyeni, Boubacar Jean Yves; Zabsonre, Patrice

    2012-01-01

    La prise en charge de l'infarctus du myocarde est une course contre la montre et les trois premières heures constituent les « golden hours ». Les objectifs de ce travail étaient de déterminer le délai de prise en charge des infarctus du myocarde du myocarde au Burkina Faso, les facteurs liés à un allongement du délai et le pronostic des patients. Il s'agit d'une étude transversale descriptive menée de Septembre 2010 à Août 2011. Le critère d'inclusion était l'infarctus du myocarde dont le diagnostic était basé sur des critères clinique (douleur angineuse), électrocardiographique (sus-décalage persistant du segment ST dans au moins deux dérivations contiguës du même territoire coronaire, onde Q de nécrose) et biologique (élévation de la troponine). Les informations relatives au délai de prise en charge ont été recueillies: début du premier symptôme, contact avec le premier agent de santé et le cardiologue, nombre de centre de santé consulté avant le transfert en cardiologie, situation géographique des patients, moyen de transport utilisé. Les données ont été analysées grâce au logiciel SPSS version 17. Durant la période d’étude, 43 patients d’âge moyen de 56,51 ± 12,91 ans ont été admis pour infarctus du myocarde. Plus de la moitié des patients (72,0%) habitait Ouagadougou et sa banlieue. Le délai moyen entre le début de la douleur et la consultation dans la première structure sanitaire était de 48 ± 20,8 heures; celui entre le début de la douleur et la réalisation du premier ECG était en moyenne de 8,6 ±4,5 jours. Le délai entre la réalisation de l'ECG et l'admission dans le service de cardiologie était de 4,35 ±4,0 jours [00 heure et 13 jours]. Le délai entre l'admission dans le service de cardiologie et la thrombolyse était de 34 minutes. Enfin le délai entre le début de la douleur et le contact avec le cardiologue était de 9,6±3,5 jours. Il n'y avait pas de différence statiquement

  13. The Experience of Emotion

    PubMed Central

    Barrett, Lisa Feldman; Mesquita, Batja; Ochsner, Kevin N.; Gross, James J.

    2007-01-01

    Experiences of emotion are content-rich events that emerge at the level of psychological description, but must be causally constituted by neurobiological processes. This chapter outlines an emerging scientific agenda for understanding what these experiences feel like and how they arise. We review the available answers to what is felt (i.e., the content that makes up an experience of emotion) and how neurobiological processes instantiate these properties of experience. These answers are then integrated into a broad framework that describes, in psychological terms, how the experience of emotion emerges from more basic processes. We then discuss the role of such experiences in the economy of the mind and behavior. PMID:17002554

  14. ACTS Experiments Program

    NASA Technical Reports Server (NTRS)

    Schertler, R. J.

    1986-01-01

    An overview of the ACTS Experiments Program is presented. ACTS is being developed and will flight test the advanced technologies associated with: a Ka-band multibeam antenna, onboard signal processing and switching as well as laser communications. A nominal 3 yr experiments program is planned. Through the experiments program, the capabilities of the ACTS system will be made available to U.S. industry, university and government experimenters to test, prove the feasibility and evaluate the key ACTS system technologies. Communication modes of operation using the baseband processor and microwave switch matrix are presented, along with the antenna coverage pattern. Potential experiment categories are also presented and briefly discussed. An overall schedule of activities associated with the experiments program is outlined. Results of the ACTS Experiments Program will provide information vital to successful industry implementation of ACTS technology in a future operational system.

  15. Future reactor experiments

    SciTech Connect

    Wen, Liangjian

    2015-07-15

    The non-zero neutrino mixing angle θ{sub 13} has been discovered and precisely measured by the current generation short-baseline reactor neutrino experiments. It opens the gate of measuring the leptonic CP-violating phase and enables the neutrino mass ordering. The JUNO and RENO-50 proposals aim at resolving the neutrino mass ordering using reactors. The experiment design, physics sensitivity, technical challenges as well as the progresses of those two proposed experiments are reviewed in this paper.

  16. Gyroscope relativity experiment

    NASA Technical Reports Server (NTRS)

    Decher, R.

    1971-01-01

    A gyroscope test of general relativity theory is proposed. The basic ideas and hardware concepts conceived by the investigators to implement the experiment are discussed. The goal is to measure the extremely small relativistic precession of gyroscopes in an earth-orbiting satellite. The experiment hardware (cryogenic gyroscopes, a telescope and superconducting circuits) is enclosed in a liquid helium dewar. The experiment will operate in orbit for about one year.

  17. VISUAL ACUITY (EXPERIMENTS)

    NASA Image and Video Library

    1965-06-18

    S65-35589 (18 June 1965) --- Astronaut Charles Conrad Jr., pilot for the prime crew on the Gemini-5 spaceflight, takes pictures of predetermined land areas during visual acuity experiments over Laredo, Texas. The experiments will aid in learning to identify known terrestrial features under controlled conditions. Knowledge gained from these experiments will have later application for space pilots identifying terrestrial features from space.

  18. Microgravity Experiments On Animals

    NASA Technical Reports Server (NTRS)

    Dalton, B. P.; Leon, H.; Hogan, R.; Clarke, B.; Tollinger, D.

    1991-01-01

    Paper describes experiments on animal subjects planned for Spacelab Life Sciences 1 mission. Laboratory equipment evaluated, and physiological experiments performed. Represents first step in establishing technology for maintaining and manipulating rodents, nonhuman primates, amphibians, and plants during space flight without jeopardizing crew's environment. In addition, experiments focus on effects of microgravity on cardiopulmonary, cardiovascular, and musculoskeletal systems; on regulation of volume of blood and production of red blood cells; and on calcium metabolism and gravity receptors.

  19. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-16

    Errol Korn, seated left, deploys a dropsonde experiment over the Gulf of Mexico during a flight aboard the NASA DC-8 as Janel Thomas, a University of Maryland Baltimore County (UMBC) graduate student, and Bob Pasken, look on , Tuesday, Aug. 17, 2010. The Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  20. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-15

    Syed Ismail, from the Langley Research Center, principal investigator for the Lidar Atmospheric Sensing Experiment (LASE) is seen aboard the NASA DC-8 aircraft, Monday, August 16, 2010, at Fort Lauderdale Hollywood International Airport in Fort Lauderdale, Fla. The Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  1. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-15

    The NASA DC-8 airplane sits on the tarmac, Monday, Aug. 16, 2010, at Fort Lauderdale Hollywood International Airport in Fort Lauderdale, Fla. , as preparations continue for its part in the GRIP experiment. The Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  2. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-14

    The NASA DC-8 airplane sits on the tarmac, Sunday, Aug. 15, 2010, at Fort Lauderdale International Airport in Fort Lauderdale, Fla. , as preparations continue for its part in the GRIP experiment. The Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  3. Microgravity Experiments On Animals

    NASA Technical Reports Server (NTRS)

    Dalton, B. P.; Leon, H.; Hogan, R.; Clarke, B.; Tollinger, D.

    1991-01-01

    Paper describes experiments on animal subjects planned for Spacelab Life Sciences 1 mission. Laboratory equipment evaluated, and physiological experiments performed. Represents first step in establishing technology for maintaining and manipulating rodents, nonhuman primates, amphibians, and plants during space flight without jeopardizing crew's environment. In addition, experiments focus on effects of microgravity on cardiopulmonary, cardiovascular, and musculoskeletal systems; on regulation of volume of blood and production of red blood cells; and on calcium metabolism and gravity receptors.

  4. Chemiluminescence: An Illuminating Experiment

    ERIC Educational Resources Information Center

    Gafney, Harry D.; Adamson, Arthur W.

    1975-01-01

    Describes an experiment in which luminescence is observed during a reaction between sodium borohydride and trisbipyridalruthenium (III). Includes a discussion of the theory of chemiluminescence. (MLH)

  5. [Near death experiences].

    PubMed

    Rubia Vila, Francisco José

    2012-01-01

    Near Death Experiences are those accounted by people who after being clinically dead return to life spontaneously or after reanimation. These experiences have been used traditionally to support the belief in the existence of the soul and of life after death. However, today neuroscience tries to explain these experiences from the scientific point of view, i.e. explaining them based on their brain substrates. Their resemblance to mystic experiences and to altered states of consciousness seems to indicate that they may be produced by hyperactivity of limbic structures caused by anoxia or hypercapnia.

  6. SEDS experiment design definition

    NASA Technical Reports Server (NTRS)

    Carroll, Joseph A.; Alexander, Charles M.; Oldson, John C.

    1990-01-01

    The Small Expendable-tether Deployment System (SEDS) was developed to design, build, integrate, fly, and safely deploy and release an expendable tether. A suitable concept for an on-orbit test of SEDS was developed. The following tasks were performed: (1) Define experiment objectives and requirements; (2) Define experiment concepts to reach those objectives; (3) Support NASA in experiment concept selection and definition; (4) Perform analyses and tests of SEDS hardware; (5) Refine the selected SEDS experiment concept; and (6) Support interactive SEDS system definition process. Results and conclusions are given.

  7. Chemiluminescence: An Illuminating Experiment

    ERIC Educational Resources Information Center

    Gafney, Harry D.; Adamson, Arthur W.

    1975-01-01

    Describes an experiment in which luminescence is observed during a reaction between sodium borohydride and trisbipyridalruthenium (III). Includes a discussion of the theory of chemiluminescence. (MLH)

  8. The Student Experience.

    ERIC Educational Resources Information Center

    Haselgrove, Susanne, Ed.

    This collection of papers discusses the experience of students in the United Kingdom's new, mass higher education system. The papers are viewed as dispatches from the "front line" rather than conventional analyses by education researchers. The organization of the papers mirrors the stages of students' experience of higher…

  9. Beyond the Practicum Experience

    ERIC Educational Resources Information Center

    Williams, Jessica

    2009-01-01

    The practicum is an important part of most TESL programmes; however, many novice teachers seek practical experiences beyond the practicum as part of their preparation for entering the profession. Collaborative projects between language learners and pre-service language teachers can offer such valuable practical experiences for both groups. The…

  10. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1985

    1985-01-01

    Describes: (1) two experiments using a laser (resonant cavity for light and pinhole camera effect with a hologram); (2) optical differaction patterns displayed by microcomputer; and (3) automating the Hall effect (with comments on apparatus needed and computer program used); and (4) an elegant experiment in mechanical equilibrium. (JN)

  11. Real-World Experiences

    ERIC Educational Resources Information Center

    Borja, Rhea R.

    2006-01-01

    This article presents IISME, a U.S. program that can give educators a real-world experience and that can deepen their subject-matter knowledge. It also presents the experiences of some teachers who are into this program. IISME's summer-fellowship program started out with 40 teachers and 12 companies. The group's growth picked up in 2001, when it…

  12. On the Poggendorff Experiment

    ERIC Educational Resources Information Center

    Coelho, Ricardo Lopes; Silva, P. A. S.; Borges, Paulo de Faria

    2015-01-01

    Poggendorff showed experimentally, in the middle of the 19th century, that the weight of an Atwood machine is reduced when it is brought to motion. His experiment has been revisited from time to time, making use of instrumentation that reflects the technological development of the moment. In this paper, the evolution of the experiment is briefly…

  13. Varieties of Musical Experience

    ERIC Educational Resources Information Center

    Bharucha, J. Jamshed; Curtis, Meagan; Paroo, Kaivon

    2006-01-01

    In this paper, we argue that music cognition involves the use of acoustic and auditory codes to evoke a variety of conscious experiences. The variety of domains that are encompassed by music is so diverse that it is unclear whether a single domain of structure or experience is defining. Music is best understood as a form of communication in which…

  14. Neutrino Oscillation Experiments

    NASA Astrophysics Data System (ADS)

    Scholberg, Kate

    The discovery of neutrino oscillations was recognized by the 2015 Nobel Prize. Tremendous progress has been made in the past two decades on understanding of neutrino mass and mixing properties, yet there are remaining unknowns. This talk presented an overview of neutrino oscillation experiments, with emphasis on recent results from beam and reactor experiments, as well as exciting prospects for the next decades.

  15. Japanese Experiment Module

    NASA Image and Video Library

    2003-11-05

    The Japanese Experiment Module (JEM) is moved on its workstand in the Space Station Processing Facility. The JEM will undergo pre-assembly measurements. Developed by the Japan Aerospace Exploration Agency (JAXA), the JEM will enhance the unique research capabilities of the orbiting complex by providing an additional environment for astronauts to conduct science experiments.

  16. Experiment in Structural Learning.

    ERIC Educational Resources Information Center

    Diener, Z. P.

    The concern of the experiment is to find out the roles of abstraction and generalization in the learning of mathematical structures. The basic question is whether to generalize before abstracting or vice-versa in order to maximize transfer. The experiment involves four mathematical tasks and a transfer of activity. Experimental procedures are…

  17. Play as Experience

    ERIC Educational Resources Information Center

    Henricks, Thomas S.

    2015-01-01

    The author investigates what he believes one of the more important aspects of play--the experience it generates in its participants. He considers the quality of this experience in relation to five ways of viewing play--as action, interaction, activity, disposition, and within a context. He treats broadly the different forms of affect, including…

  18. Fluorescence Experiments with Quinine

    ERIC Educational Resources Information Center

    O'Reilly, James E.

    1975-01-01

    Describes a series of experiments which illustrate the analytical capabilities of fluorescence, and outlines two straightforward analyses involving real analyses. These experiments are suitable for an undergraduate instrumental analysis course and require approximately six to seven hours of laboratory time. (MLH)

  19. MSFC Skylab corollary experiments

    NASA Technical Reports Server (NTRS)

    1974-01-01

    The evolution of the development and integration of Skylab experiments from initial concepts through mission operations is documented. All experiment systems are covered as well as management controls which were developed and exercised to assure acceptable operational capability and optimize data acquisition for final scientific results.

  20. THX Experiment Overview

    NASA Technical Reports Server (NTRS)

    Wernet, Mark; Wroblewski, Adam; Locke, Randy; Georgiadis, Nick

    2016-01-01

    This presentation provides an overview of experiments conducted at NASA GRC to provide turbulent flow measurements needed for new turbulence model development and validation. The experiments include particle image velocimetry (PIV) and hot-wire measurements of mean flow velocity and temperature fields, as well as fluctuating components.

  1. Experience and appreciation

    Treesearch

    Yi-Fu Tuan

    1977-01-01

    A young child has keen senses, but his world is not thereby more filled with sensory values than that of an adult. To enjoy the physical environment fully the mere capacity to experience stimuli is not enough; it must be complemented by appreciation, which is an intellectual activity. A young child's experiences of nature are often more intense than those of an...

  2. Science Experience Unit: Conservation.

    ERIC Educational Resources Information Center

    Ferguson-Florissant School District, Ferguson, MO.

    GRADES OR AGES: Intermediate grades. SUBJECT MATTER: Conservation. ORGANIZATION AND PHYSICAL APPEARANCE: The guide is divided into 24 experiments. It is mimeographed and staple-bound with a paper cover. OBJECTIVES AND ACTIVITIES: A specific skill or knowledge objective is stated at the beginning of each experiment. Detailed procedures are listed…

  3. The Student Athlete Experience

    ERIC Educational Resources Information Center

    Gayles, Joy Gaston

    2009-01-01

    Prior to the 1980s, the literature on the experiences of collegiate student athletes was rather scarce. Since that time the National Collegiate Athletic Association (NCAA) has passed several eligibility rules to address concerns about the academic performance and the overall experience of student athletes on college campuses. As such, the…

  4. The Jumping Ring Experiment

    ERIC Educational Resources Information Center

    Baylie, M.; Ford, P. J.; Mathlin, G. P.; Palmer, C.

    2009-01-01

    The jumping ring experiment has become central to liquid nitrogen shows given as part of the outreach and open day activities carried out within the University of Bath. The basic principles of the experiment are described as well as the effect of changing the geometry of the rings and their metallurgical state. In general, aluminium rings are…

  5. The Jumping Ring Experiment

    ERIC Educational Resources Information Center

    Baylie, M.; Ford, P. J.; Mathlin, G. P.; Palmer, C.

    2009-01-01

    The jumping ring experiment has become central to liquid nitrogen shows given as part of the outreach and open day activities carried out within the University of Bath. The basic principles of the experiment are described as well as the effect of changing the geometry of the rings and their metallurgical state. In general, aluminium rings are…

  6. Experience with MODSIM II

    SciTech Connect

    Streets, J.; Berg, D.; Oleynik, G.; Pordes, R.; Slimmer, D.

    1992-02-01

    We present results of computer simulations for Data Acquisition systems for large fixed target experiments in an object oriented simulation language, MODSIM. This paper summarizes our experiences and presents preliminary results from the simulation already completed. We also indicate the resources required for this project.

  7. Varieties of Musical Experience

    ERIC Educational Resources Information Center

    Bharucha, J. Jamshed; Curtis, Meagan; Paroo, Kaivon

    2006-01-01

    In this paper, we argue that music cognition involves the use of acoustic and auditory codes to evoke a variety of conscious experiences. The variety of domains that are encompassed by music is so diverse that it is unclear whether a single domain of structure or experience is defining. Music is best understood as a form of communication in which…

  8. Music and Experience.

    ERIC Educational Resources Information Center

    Koob, Joseph E., II

    1984-01-01

    Describes the educational theories of John Dewey, and especially his emphasis on the importance of experience. In terms of music education, this involves providing students with expressive experiences and directing students so that there is growth in understanding, meaning, and value. (CS)

  9. Franklin: User Experiences

    SciTech Connect

    National Energy Research Supercomputing Center; He, Yun; Kramer, William T.C.; Carter, Jonathan; Cardo, Nicholas

    2008-05-07

    The newest workhorse of the National Energy Research Scientific Computing Center is a Cray XT4 with 9,736 dual core nodes. This paper summarizes Franklin user experiences from friendly early user period to production period. Selected successful user stories along with top issues affecting user experiences are presented.

  10. Near-death experiences.

    PubMed Central

    Blackmore, S J

    1996-01-01

    Reactions to claims of near-death experiences (NDE) range from the popular view that this must be evidence for life after death, to outright rejection of the experiences as, at best, drug induced hallucinations or, at worse, pure invention. Twenty years, and much research, later, it is clear that neither extreme is correct. PMID:8683504

  11. Supervised Business Experience Handbook.

    ERIC Educational Resources Information Center

    Missouri Univ., Columbia. Instructional Materials Lab.

    This handbook explains how to conduct a supervised business education experience program in Missouri, outlining the program, rationale, components, principles, and resources. Specifically, the 11 units cover the following: (1) introduction to supervised business experience; (2) program design; (3) state policies; (4) the advisory committee; (5)…

  12. Shusterman on Somatic Experience

    ERIC Educational Resources Information Center

    Maattanen, Pentti

    2010-01-01

    Richard Shusterman's "Body Consciousness" aims at formulating a theory of somaesthetics and somatic experience. There has indeed been a growing interest in the role of the body in experience. Shusterman examines the arguments of six important writers who have been influential in this discussion. The emphasis on the body is natural for a…

  13. Shusterman on Somatic Experience

    ERIC Educational Resources Information Center

    Maattanen, Pentti

    2010-01-01

    Richard Shusterman's "Body Consciousness" aims at formulating a theory of somaesthetics and somatic experience. There has indeed been a growing interest in the role of the body in experience. Shusterman examines the arguments of six important writers who have been influential in this discussion. The emphasis on the body is natural for a…

  14. Ball Collision Experiments

    ERIC Educational Resources Information Center

    Cross, R.

    2015-01-01

    Experiments are described on collisions between two billiard balls and between a bat and a ball. The experiments are designed to extend a student's understanding of collision events and could be used either as a classroom demonstration or for a student project.

  15. Peak Experience Project

    ERIC Educational Resources Information Center

    Scott, Daniel G.; Evans, Jessica

    2010-01-01

    This paper emerges from the continued analysis of data collected in a series of international studies concerning Childhood Peak Experiences (CPEs) based on developments in understanding peak experiences in Maslow's hierarchy of needs initiated by Dr Edward Hoffman. Bridging from the series of studies, Canadian researchers explore collected…

  16. Seasat land experiments

    NASA Technical Reports Server (NTRS)

    Estes, J. E.; Barath, F.; Bryant, N.; Cannon, P. J.; Elachi, C.; Goetz, A.; Krishen, K.; Macdonald, H. C.; Marmelstein, A.; Miller, L. J.

    1978-01-01

    An overview of the Seasat land experiments is presented. The potential roles for active microwave imaging systems on board satellites were reviewed with particular emphasis on the Seasat Synthetic Aperture Radar (SAR). Recommendations were made concerning the type of experiments that could most profitably be conducted over land with the Seasat SAR system capabilities available.

  17. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1980

    1980-01-01

    Describes briefly three experiments, which are presented by three physics teachers to share their ideas with other teachers and readers. These experiments are: (1) a simple hazemeter for window pollution assessment; (2) the speed of light; and (3) the ball-bearing electric motor. (HM)

  18. Human Simulated Diving Experiments.

    ERIC Educational Resources Information Center

    Bruce, David S.; Speck, Dexter F.

    1979-01-01

    This report details several simulated divinq experiments on the human. These are suitable for undergraduate or graduate laboratories in human or environmental physiology. The experiment demonstrates that a diving reflex is precipitated by both facial cooling and apnea. (Author/RE)

  19. Undergraduate Infrared Spectroscopy Experiments.

    ERIC Educational Resources Information Center

    MacCarthy, Patrick; Bowman, Susan J.

    1982-01-01

    Highlights procedures and results of an experiment using atomic absorption spectroscope to illustrate a fundamental chemical concept. The experiment demonstrates the dependence of the solubility product of lead sulfate on ionic strength in the presence of a slight excess of anion. (Author/JN)

  20. Boyle's Law Experiment.

    ERIC Educational Resources Information Center

    Hermens, Richard A.

    1983-01-01

    Suggests that ideal experiments fit into course time constraints and be meaningful, relevant to course content, safe, inexpensive, simple, reproducible, and easy to set up/maintain. Describes a Boyle's Law experiment that uses a minimum of equipment and meets the foregoing criteria. Apparatus used, procedures, and safety precautions are…

  1. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1980

    1980-01-01

    Describes briefly three experiments, which are presented by three physics teachers to share their ideas with other teachers and readers. These experiments are: (1) a simple hazemeter for window pollution assessment; (2) the speed of light; and (3) the ball-bearing electric motor. (HM)

  2. Fluids Experiment Apparatus (FEA)

    NASA Technical Reports Server (NTRS)

    Martin, M.

    1984-01-01

    The Fluids Experiment Apparatus FEA is a modular zero gravity chemistry/physics laboratory to support fundamental space processing research. It can be used to conduct basic and applied process or product experiments in general liquid chemistry, crystal growth, fluid mechanics, thermodynamics, and cell culturing. The various FEA subsystems are readily configured to perform a wide range of investigations.

  3. Grip Experiment 2010

    NASA Image and Video Library

    2010-08-16

    A researcher with the Genesis and Rapid Intensification Processes (GRIP) experiment works aboard the NASA DC-8 during a flight over the Gulf of Mexico, Tuesday, Aug. 17, 2010. GRIP is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  4. Real-World Experiences

    ERIC Educational Resources Information Center

    Borja, Rhea R.

    2006-01-01

    This article presents IISME, a U.S. program that can give educators a real-world experience and that can deepen their subject-matter knowledge. It also presents the experiences of some teachers who are into this program. IISME's summer-fellowship program started out with 40 teachers and 12 companies. The group's growth picked up in 2001, when it…

  5. Corn blight watch experiment

    NASA Technical Reports Server (NTRS)

    1974-01-01

    The corn blight problem is briefly described how the experiment was organized and conducted, the effect of the blight on the 1971 crop, and some conclusions that may be drawn as a result of the experiment. The information is based on preliminary reports of the Corn Blight Watch Steering Committee and incorporates much illustrative material conceived at Purdue University.

  6. Experiments in Science Teaching

    ERIC Educational Resources Information Center

    Hempstead, C. A.

    1973-01-01

    Analyzes the role of experiments in science teaching, and applies this analysis to the teaching of Millikan's experiment in physics. Critically examines an article written by T. J. Harvey entitled Millikan made easy'' which was previously published in The School Science Review. (JR)

  7. Undergraduate Infrared Spectroscopy Experiments.

    ERIC Educational Resources Information Center

    MacCarthy, Patrick; Bowman, Susan J.

    1982-01-01

    Highlights procedures and results of an experiment using atomic absorption spectroscope to illustrate a fundamental chemical concept. The experiment demonstrates the dependence of the solubility product of lead sulfate on ionic strength in the presence of a slight excess of anion. (Author/JN)

  8. Some Novel Fieldwork Experiments.

    ERIC Educational Resources Information Center

    Vincent, Julian F. V.; Kitchener, Andrew C.

    1988-01-01

    Describes results and experiences of four field-course experiments designed to explore the relationships between animals and their physical environment. Reports on the response of animals to flow rate of water, relationship between size and rate of locomotion, and mathematical and physical techniques used to study how animals live. (RT)

  9. Beyond the Practicum Experience

    ERIC Educational Resources Information Center

    Williams, Jessica

    2009-01-01

    The practicum is an important part of most TESL programmes; however, many novice teachers seek practical experiences beyond the practicum as part of their preparation for entering the profession. Collaborative projects between language learners and pre-service language teachers can offer such valuable practical experiences for both groups. The…

  10. Nonparametric identification experiment

    NASA Technical Reports Server (NTRS)

    Yam, Yeung

    1988-01-01

    The following constitutes a summary of this paper: on-orbit identification methodology starts with nonparametric techniques for a priori system identification; development of the nonparametric identification and model determination experiment software has been completed; the validation experiments to be performed on the JPL Control and Identification Technology Validation Laboratory have been designed.

  11. Experience with MODSIM II

    SciTech Connect

    Streets, J.; Berg, D.; Oleynik, G.; Pordes, R.; Slimmer, D.

    1992-02-01

    We present results of computer simulations for Data Acquisition systems for large fixed target experiments in an object oriented simulation language, MODSIM. This paper summarizes our experiences and presents preliminary results from the simulation already completed. We also indicate the resources required for this project.

  12. On the Poggendorff Experiment

    ERIC Educational Resources Information Center

    Coelho, Ricardo Lopes; Silva, P. A. S.; Borges, Paulo de Faria

    2015-01-01

    Poggendorff showed experimentally, in the middle of the 19th century, that the weight of an Atwood machine is reduced when it is brought to motion. His experiment has been revisited from time to time, making use of instrumentation that reflects the technological development of the moment. In this paper, the evolution of the experiment is briefly…

  13. A Duplicate Construction Experiment.

    ERIC Educational Resources Information Center

    Bridgeman, Brent

    This experiment was designed to assess the ability of item writers to construct truly parallel tests based on a "duplicate-construction experiment" in which Cronbach argues that if the universe description and sampling are ideally refined, the two independently constructed tests will be entirely equivalent, and that within the limits of item…

  14. Peak Experience Project

    ERIC Educational Resources Information Center

    Scott, Daniel G.; Evans, Jessica

    2010-01-01

    This paper emerges from the continued analysis of data collected in a series of international studies concerning Childhood Peak Experiences (CPEs) based on developments in understanding peak experiences in Maslow's hierarchy of needs initiated by Dr Edward Hoffman. Bridging from the series of studies, Canadian researchers explore collected…

  15. Ball Collision Experiments

    ERIC Educational Resources Information Center

    Cross, R.

    2015-01-01

    Experiments are described on collisions between two billiard balls and between a bat and a ball. The experiments are designed to extend a student's understanding of collision events and could be used either as a classroom demonstration or for a student project.

  16. Extravehicular activity welding experiment

    NASA Technical Reports Server (NTRS)

    Watson, J. Kevin

    1989-01-01

    The In-Space Technology Experiments Program (INSTEP) provides an opportunity to explore the many critical questions which can only be answered by experimentation in space. The objective of the Extravehicular Activity Welding Experiment definition project was to define the requirements for a spaceflight experiment to evaluate the feasibility of performing manual welding tasks during EVA. Consideration was given to experiment design, work station design, welding hardware design, payload integration requirements, and human factors (including safety). The results of this effort are presented. Included are the specific objectives of the flight test, details of the tasks which will generate the required data, and a description of the equipment which will be needed to support the tasks. Work station requirements are addressed as are human factors, STS integration procedures and, most importantly, safety considerations. A preliminary estimate of the cost and the schedule for completion of the experiment through flight and postflight analysis are given.

  17. Hadron production experiments

    NASA Astrophysics Data System (ADS)

    Popov, Boris A.

    2013-02-01

    The HARP and NA61/SHINE hadroproduction experiments as well as their implications for neutrino physics are discussed. HARP measurements have already been used for predictions of neutrino beams in K2K and MiniBooNE/SciBooNE experiments and are also being used to improve the atmospheric neutrino flux predictions and to help in the optimization of neutrino factory and super-beam designs. First measurements released recently by the NA61/SHINE experiment are of significant importance for a precise prediction of the J-PARC neutrino beam used for the T2K experiment. Both HARP and NA61/SHINE experiments provide also a large amount of input for validation and tuning of hadron production models in Monte-Carlo generators.

  18. Health education telecommunications experiment

    NASA Technical Reports Server (NTRS)

    Whalen, A. A.

    1975-01-01

    The Health/Education Telecommunications Experiment (HET) was conducted jointly by NASA and HEW on NASA's ATS-6 communications satellite. This experiment actually consisted of six experiments testing health and education applications of a communication spacecraft producing a broadcast of color television directly from space to over 120 low-cost receivers located in remote rural areas throughout the U.S. (including Alaska). The experiments were conducted over the period from 2 July 1974 to 20 May 1975 and operated on an almost daily basis. The overall telecommunications system to support these experiments consisted of many elements: The ATS-6 spacecraft; five different types of earth stations consisting of 120 video receive terminals, 51 telephony tranceivers and eight video originating terminals of three different types. Actual performance of the equipment as measured in the field was shown to equal or exceed predicted values.

  19. Space Experiment Module (SEM)

    NASA Technical Reports Server (NTRS)

    Brodell, Charles L.

    1999-01-01

    The Space Experiment Module (SEM) Program is an education initiative sponsored by the National Aeronautics and Space Administration (NASA) Shuttle Small Payloads Project. The program provides nationwide educational access to space for Kindergarten through University level students. The SEM program focuses on the science of zero-gravity and microgravity. Within the program, NASA provides small containers or "modules" for students to fly experiments on the Space Shuttle. The experiments are created, designed, built, and implemented by students with teacher and/or mentor guidance. Student experiment modules are flown in a "carrier" which resides in the cargo bay of the Space Shuttle. The carrier supplies power to, and the means to control and collect data from each experiment.

  20. USML-1 Glovebox experiments

    NASA Technical Reports Server (NTRS)

    Naumann, Robert J.

    1995-01-01

    This report covers the development of and results from three experiments that were flown in the Materials Science Glovebox on USML-1: Marangoni convection in Closed Containers (MCCC), Double Float Zone (DFZ), and Fiber Pulling in Microgravity (FPM). The Glovebox provided a convenient, low cost method for doing simple 'try and see' experiments that could test new concepts or elucidate microgravity phenomena. Since the Glovebox provided essentially one (or possibly two levels of confinement, many of the stringent verification and test requirements on the experiment apparatus could be relaxed and a streamlined test and verification plan for flight qualification could be implemented. Furthermore, the experiments were contained in their own carrying cases whose external configurations could be identified early in the integration sequence for stowage considerations while delivery of the actual experiment apparatus could be postponed until only a few months before flight. This minimized the time fluids must be contained and reduced the possibility of corrosive reactions that could ruin the experiment. In many respects, this exercise was as much about developing a simpler, cheaper way of doing crew-assisted science as it was about the actual scientific accomplishments of the individual experiments. The Marangoni Convection in Closed Containers experiment was designed to study the effects of a void space in a simulated Bridgman crystal growth configuration and to determine if surface tension driven convective flows that may result from thermal gradients along any free surfaces could affect the solidification process. The Fiber Pulling in Microgravity experiment sought to separate the role of gravity drainage from capillarity effects in the break-up of slender cylindrical liquid columns. The Stability of a Double Float Zone experiment explored the feasibility of a quasi-containerless process in which a solidifying material is suspended by two liquid bridges of its own melt.

  1. Ecrire avec...un Telex (Writing with...a Telex).

    ERIC Educational Resources Information Center

    Eisl, Margit

    1987-01-01

    A discussion of instruction in French telex correspondence suggests class activities for understanding telex use; analyzing the language forms used; producing and responding to messages; and choosing among telex, telephone, and letter correspondence. (MSE)

  2. Understanding customer experience.

    PubMed

    Meyer, Christopher; Schwager, Andre

    2007-02-01

    Anyone who has signed up for cell phone service, attempted to claim a rebate, or navigated a call center has probably suffered from a company's apparent indifference to what should be its first concern: the customer experiences that culminate in either satisfaction or disappointment and defection. Customer experience is the subjective response customers have to direct or indirect contact with a company. It encompasses every aspect of an offering: customer care, advertising, packaging, features, ease of use, reliability. Customer experience is shaped by customers' expectations, which largely reflect previous experiences. Few CEOs would argue against the significance of customer experience or against measuring and analyzing it. But many don't appreciate how those activities differ from CRM or just how illuminating the data can be. For instance, the majority of the companies in a recent survey believed they have been providing "superior" experiences to customers, but most customers disagreed. The authors describe a customer experience management (CEM) process that involves three kinds of monitoring: past patterns (evaluating completed transactions), present patterns (tracking current relationships), and potential patterns (conducting inquiries in the hope of unveiling future opportunities). Data are collected at or about touch points through such methods as surveys, interviews, focus groups, and online forums. Companies need to involve every function in the effort, not just a single customer-facing group. The authors go on to illustrate how a cross-functional CEM system is created. With such a system, companies can discover which customers are prospects for growth and which require immediate intervention.

  3. Japanese Experiment Module arrival

    NASA Image and Video Library

    2007-03-29

    Several components for delivery to the International Space Station sit in test stands inside the Space Station Processing Facility highbay. To the right, from back to front, are the Japanese Experiment Module, the Raffaello multi-purpose logistics module, and the European Space Agency's Columbus scientific research module. To the left in front is the starboard truss segment S5. Behind it is the test stand that will hold the Experiment Logistics Module Pressurized Section for the Japanese Experiment Module. The logistics module is one of the components of the Japanese Experiment Module or JEM, also known as Kibo, which means "hope" in Japanese. Kibo comprises six components: two research facilities -- the Pressurized Module and Exposed Facility; a Logistics Module attached to each of them; a Remote Manipulator System; and an Inter-Orbit Communication System unit. Kibo also has a scientific airlock through which experiments are transferred and exposed to the external environment of space. Kibo is Japan's first human space facility and its primary contribution to the station. Kibo will enhance the unique research capabilities of the orbiting complex by providing an additional environment in which astronauts can conduct science experiments. The various components of JEM will be assembled in space over the course of three Space Shuttle missions. The first of those three missions, STS-123, will carry the Experiment Logistics Module Pressurized Section aboard the Space Shuttle Endeavour, targeted for launch in 2007.

  4. LDR structural experiment definition

    NASA Technical Reports Server (NTRS)

    Russell, Richard A.; Gates, Richard M.

    1988-01-01

    A study was performed to develop the definition of a structural flight experiment for a large precision segmented reflector that would utilize the Space Station. The objective of the study was to use the Large Deployable Reflector (LDR) baseline configuration for focusing on experiment definition activity which would identify the Space Station accommodation requirements and interface constraints. Results of the study defined three Space Station based experiments to demonstrate the technologies needed for an LDR type structure. The basic experiment configurations are the same as the JPL baseline except that the primary mirror truss is 10 meters in diameter instead of 20. The primary objectives of the first experiment are to construct the primary mirror support truss and to determine its structural and thermal characteristics. Addition of the optical bench, thermal shield and primary mirror segments and alignment of the optical components occur on the second experiment. The structure will then be moved to the payload pointing system for pointing, optical control and scientific optical measurement for the third experiment.

  5. Radiochemical solar neutrino experiments

    NASA Astrophysics Data System (ADS)

    Gavrin, V. N.; Cleveland, B. T.

    2011-12-01

    Radiochemical experiments have been crucial to solar neutrino research. Even today, they provide the only direct measurement of the rate of the proton-proton fusion reaction, p+p→d+e++νe, which generates most of the Sun's energy. We first give a little history of radiochemical solar neutrino experiments with emphasis on the gallium experiment SAGE - the only currently operating detector of this type. The combined result of all data from the Ga experiments is a capture rate of 67.6±3.7 SNU. For comparison to theory, we use the calculated flux at the Sun from a standard solar model, take into account neutrino propagation from the Sun to the Earth and the results of neutrino source experiments with Ga, and obtain 67.3-3.5+3.9 SNU. Using the data from all solar neutrino experiments we calculate an electron neutrino pp flux of ϕpp♁=(3.41-0.77+0.76)×1010/(cm-s), which agrees well with the prediction from a detailed solar model of ϕpp♁=(3.30-0.14+0.13)×1010/(cm-s). Four tests of the Ga experiments have been carried out with very intense reactor-produced neutrino sources and the ratio of observed to calculated rates is 0.88±0.05. One explanation for this unexpectedly low result is that the cross section for neutrino capture by the two lowest-lying excited states in 71Ge has been overestimated. We end with consideration of possible time variation in the Ga experiments and an enumeration of other possible radiochemical experiments that might have been.

  6. Industrial application experiment series

    NASA Technical Reports Server (NTRS)

    Bluhm, S. A.

    1981-01-01

    Two procurements within the Industrial Application Experiment Series of the Thermal Power Systems Project are discussed. The first procurement, initiated in April 1980, resulted in an award to the Applied Concepts Corporation for the Capital Concrete Experiment: two Fresnel concentrating collectors will be evaluated in single-unit installations at the Jet Propulsion Laboratory Parabolic Dish Test Site and at Capitol Concrete Products, Topeka, Kansas. The second procurement, initiated in March 1981, is titled, "Thermal System Engineering Experiment B." The objective of the procurement is the rapid deployment of developed parabolic dish collectors.

  7. Nightshade Prototype Experiments (Silverleaf)

    SciTech Connect

    Danielson, Jeremy; Bauer, Amy L.

    2016-12-23

    The Red Sage campaign is a series of subcritical dynamic plutonium experiments designed to measure ejecta. Nightshade, the first experiments in Red Sage scheduled for fiscal year 2019, will measure the amount of ejecta emission into vacuum from a double-­shocked plutonium surface. To address the major technical risks in Nightshade, a Level 2 milestone was developed for fiscal year 2016. Silverleaf, a series of four experiments, was executed at the Los Alamos National Laboratory in July and August 2016 to demonstrate a prototype of the Nightshade package and to satisfy this Level 2 milestone. This report is documentation that Red Sage Level 2 milestone requirements were successfully met.

  8. Hydrothermal organic synthesis experiments

    NASA Technical Reports Server (NTRS)

    Shock, Everett L.

    1992-01-01

    Ways in which heat is useful in organic synthesis experiments are described, and experiments on the hydrothermal destruction and synthesis of organic compounds are discussed. It is pointed out that, if heat can overcome kinetic barriers to the formation of metastable states from reduced or oxidized starting materials, abiotic synthesis under hydrothermal conditions is a distinct possibility. However, carefully controlled experiments which replicate the descriptive variables of natural hydrothermal systems have not yet been conducted with the aim of testing the hypothesis of hydrothermal organic systems.

  9. THERMAL DISTRIBUTION SYSTEM EXPERIMENT

    SciTech Connect

    KRAJEWSKI,R.F.; ANDREWS,J.W.; WEI,G.

    1999-09-01

    A laboratory experiment has been conducted which tests for the effects of distribution system purging on system Delivery Effectiveness (DE) as defined in ASHRAE 152P. The experiment is described in its configuration, instrumentation, and data acquisition system. Data gathered in the experiment is given and discussed. The results show that purging of the distribution system alone does not offer any improvement of the system DE. Additional supporting tests were conducted regarding experimental simulations of buffer zones and bare pipe and are also discussed.

  10. Advanced biostack experiment

    NASA Technical Reports Server (NTRS)

    Buecker, H.

    1981-01-01

    The Advanced Biostack Experiment is described. The objectives are: (1) to confirm, complement, and enlarge the information obtained from the previous experiments by applying improved and advanced methods of localization and physical and biological evaluation, performing advanced experiments based on these data, and including additional biological specimens and additional radiation detectors; (2) to determine the biological importance of nuclear disintegration stars; (3) to determine the interference of HZE particle induced effects with those of other space flight factors (e.g., weightlessness); and (4) to determine the distribution of HZE particles and of disintegration stars at different locations inside the module and on the pallet.

  11. ROCSAT-1 telecommunication experiments

    NASA Technical Reports Server (NTRS)

    Chang, J. F.; Taur, R. R.; Chu, T. H.; Li, H. S.; Su, Y. T.; Kiang, Y. W.; Su, S. L.; Shih, M. P.; Lin, H. D.; Chung, C. D.

    1993-01-01

    This paper addresses a telecommunication payload project approved by the R.O.C. NSPO's ROCSAT-1 space program. This project will enable several innovative experiments via the low-earth-orbit satellite ROCSAT-1, including multipath fading channel characterization, ionospheric scintillation measurement, real-time voice communications, and CDMA data communications. A unified L/S-band transponder payload is proposed for conducting these experiments in an efficient way. The results of these experiments would provide the evolving mobile communication communities with fruitful information.

  12. Nimbus-5 ITPR Experiment.

    PubMed

    Smith, W L; Hilleary, D T; Fischer, J C; Howell, H B; Woolf, H M

    1974-03-01

    The Nimbus-5 infrared temperature profile radiometer (ITPR) experiment was designed to measure upwelling infrared radiation in appropriate spectral intervals and with sufficient geographical resolution for sounding the atmosphere's temperature distribution down to the earth's surface even under partly cloudy sky conditions. A primary scientific goal of the experiment was the specification of the mesoscale features of surface and atmospheric temperature and water vapor that are associated with intense weather systems. In this paper the ITPR instrument is described and some initial spacecraft results are given that demonstrate the success of the experiment in achieving its scientific goals.

  13. Advanced biostack experiment

    SciTech Connect

    Buecker, H.

    1981-11-01

    The Advanced Biostack Experiment is described. The objectives are: (1) to confirm, complement, and enlarge the information obtained from the previous experiments by applying improved and advanced methods of localization and physical and biological evaluation, performing advanced experiments based on these data, and including additional biological specimens and additional radiation detectors (2) to determine the biological importance of nuclear disintegration stars (3) to determine the interference of HZE particle induced effects with those of other space flight factors (e.g., weightlessness) and (4) to determine the distribution of HZE particles and of disintegration stars at different locations inside the module and on the pallet.

  14. The three eggs experiment

    NASA Astrophysics Data System (ADS)

    Şahin Bülbül, Mustafa

    2016-01-01

    The three eggs experiment concerns 37 pre-service science teachers’ predictions about the impact shapes of three uncooked eggs dropped from different heights. This experiment looks at energy transformation from potential to kinetic energy, where the smaller parts of the egg shell spread far from the center of the impact. This experience encouraged the pre-service science teachers to use their familiar models, such as a fried egg, omelet, puddle, dropping or explosions, to explain their predictions. These models from everyday life presented can be used as a tool to explain unfamiliar phenomena.

  15. Fracturing Experiment 2016

    SciTech Connect

    Brown, Donald W.; Keppler, H.; Kuriyagawa, Michio; Murphy, Hugh D.; Walter, Fritz

    1982-09-27

    Experiment 2016 was conducted on June 20 and 21, 1982. This experiment represented our third attempt at a fracture connection between the bottom of hole EE-2, and the openhole section of EE-3. The primary objective of Experiment 2016 was to hydraulically connect holes EE-2 and EE-3, utilizing a greater amount of injected fluid--1.3 million gallons were pumped into EE-2--and somewhat higher injection rates up to 35 BPM (as compared to 30 BPM during Expt. 2012).

  16. EXPERIMENTS - APOLLO 17

    NASA Image and Video Library

    1972-11-17

    S72-53470 (November 1972) --- The Far-Ultraviolet Spectrometer, Experiment S-169, one of the lunar orbital science experiments which will be mounted in the SIM bay of the Apollo 17 Service Module. Controls for activating and deactivating the experiment and for opening and closing a protective cover are located in the Command Module. Atomic composition, density and scale height for several constituents of the lunar atmosphere will be measured by the far-ultraviolet spectrometer. Solar far-UV radiation reflected from the lunar surface as well as UV radiation emitted by galactic sources also will be detected by the instrument.

  17. Solid Surface Combustion Experiment

    NASA Image and Video Library

    1994-09-12

    STS064-10-011 (12 Sept. 1994) --- The Solid Surface Combustion Experiment (SSCE), designed to supply information on flame spread over solid fuel surfaces in the reduced-gravity environment of space, is pictured during flight day four operations. The middeck experiment measured the rate of spreading, the solid-phase temperature, and the gas-phase temperature of flames spreading over rectangular fuel beds. STS-64 marked the seventh trip into space for the Lewis Research Center experiment. Photo credit: NASA or National Aeronautics and Space Administration

  18. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-14

    Jeffrey Beyon, left, and Paul Joseph Petzar, right, from NASA's Langley Research Center, work with DAWN Air Data Acquisition and Processing software aboard NASA's DC-8 research aircraft, Sunday, Aug. 15, 2010, in support of the GRIP experiment at Fort Lauderdale International Airport in Fort Lauderdale, Fla. The Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  19. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-14

    Jeffrey Beyon, lower right, and Paul Joseph Petzar, right, researchers from NASA's Langley Research Center, speak with Ramesh Kakar right, of the NASA Earth Science Division as they work with DAWN Air Data Acquisition and Processing software aboard NASA's DC-8 research aircraft, Sunday, Aug. 15, 2010, in support of the GRIP experiment at Fort Lauderdale International Airport in Fort Lauderdale, Fla. The Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  20. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-14

    Errol Korn, lower left, explains the dropsonde experiment to Janel Thomas, a University of Maryland Baltimore County (UMBC) graduate student, seated, as Bob Pasken, standing left, and Jeff Halverson, a GRIP project scientist from UMBC, look on inside NASA's DC-8 airplane, at Fort Lauderdale International Airport in Fort Lauderdale, Fla., Sunday, Aug. 15, 2010. The Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  1. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-15

    Susan Kool, a researcher from the Langley Research Center, works on monitoring the Lidar Atmospheric Sensing Experiment (LASE) aboard the NASA DC-8 aircraft, Monday, Aug. 16, 2010, at Fort Lauderdale Hollywood International Airport in Fort Lauderdale, Fla. LASE probes the atmosphere using lasers and is part of the Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  2. Advanced biostack experiment

    NASA Technical Reports Server (NTRS)

    Buecker, H.

    1981-01-01

    The Advanced Biostack Experiment is described. The objectives are: (1) to confirm, complement, and enlarge the information obtained from the previous experiments by applying improved and advanced methods of localization and physical and biological evaluation, performing advanced experiments based on these data, and including additional biological specimens and additional radiation detectors; (2) to determine the biological importance of nuclear disintegration stars; (3) to determine the interference of HZE particle induced effects with those of other space flight factors (e.g., weightlessness); and (4) to determine the distribution of HZE particles and of disintegration stars at different locations inside the module and on the pallet.

  3. BASS Experiment Imagery

    NASA Image and Video Library

    2013-04-09

    ISS035-E-015827 (10 April 2013) --- This is one of a series of close-up images photographed during a run of the Burning and Suppression of Solids (BASS) experiment onboard the Earth-orbiting International Space Station. Following a series of preparations, NASA astronaut Chris Cassidy (out of frame) conducted a series of runs of the experiment, which examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity. The experiment is planned for guiding strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used in the design of fire detection and suppression systems in microgravity and on Earth.

  4. BASS-II Experiment

    NASA Image and Video Library

    2014-06-27

    ISS040-E-023287 (27 June 2014) --- This is a close-up image photographed during a run of the Burning and Suppression of Solids (BASS) experiment onboard the Earth-orbiting International Space Station. Following a series of preparations, NASA astronaut Reid Wiseman (out of frame), Expedition 40 flight engineer, conducted runs of the experiment, which examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity. The experiment is planned for guiding strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used in the design of fire detection and suppression systems in microgravity and on Earth.

  5. BASS Experiment Imagery

    NASA Image and Video Library

    2013-04-09

    ISS035-E-015900 (10 April 2013) --- This is one of a series of close-up images photographed during a run of the Burning and Suppression of Solids (BASS) experiment onboard the Earth-orbiting International Space Station. Following a series of preparations, NASA astronaut Chris Cassidy (out of frame) conducted several runs of the experiment, which examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity. The experiment is planned for guiding strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used in the design of fire detection and suppression systems in microgravity and on Earth.

  6. BASS Experiment Imagery

    NASA Image and Video Library

    2013-04-09

    ISS035-E-015952 (10 April 2013) --- This is one of a series of close-up images photographed during a run of the Burning and Suppression of Solids (BASS) experiment onboard the Earth-orbiting International Space Station. Following a series of preparations, on April 5 NASA astronaut Chris Cassidy (out of frame) conducted several runs of the experiment, which examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity. The experiment is planned for guiding strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used in the design of fire detection and suppression systems in microgravity and on Earth.

  7. BASS Experiment Imagery

    NASA Image and Video Library

    2013-04-05

    ISS035-E-014987 (6 April 2013) --- This is a close-up image photographed during a run of the Burning and Suppression of Solids (BASS) experiment onboard the Earth-orbiting International Space Station. Following a series of preparations, NASA astronaut Chris Cassidy (out of frame) conducted runs of the experiment, which examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity. The experiment is planned for guiding strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used in the design of fire detection and suppression systems in microgravity and on Earth.

  8. BASS Experiment Imagery

    NASA Image and Video Library

    2013-04-09

    ISS035-E-015679 (10 April 2013) --- This is one of a series of close-up images photographed during a run of the Burning and Suppression of Solids (BASS) experiment onboard the Earth-orbiting International Space Station. Following a series of preparations, NASA astronaut Chris Cassidy (out of frame) conducted a series of runs of the experiment, which examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity. The experiment is planned for guiding strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used in the design of fire detection and suppression systems in microgravity and on Earth.

  9. BASS Experiment Imagery

    NASA Image and Video Library

    2013-04-05

    ISS035-E-014971 (6 April 2013) --- This is a close-up image photographed during a run of the Burning and Suppression of Solids (BASS) experiment onboard the Earth-orbiting International Space Station. Following a series of preparations, NASA astronaut Chris Cassidy (out of frame) conducted runs of the experiment, which examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity. The experiment is planned for guiding strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used in the design of fire detection and suppression systems in microgravity and on Earth.

  10. BASS-II Experiment

    NASA Image and Video Library

    2014-07-23

    ISS040-E-073120 (23 July 2014) --- This is a close-up image photographed during a run of the Burning and Suppression of Solids (BASS) experiment onboard the Earth-orbiting International Space Station. Following a series of preparations, NASA astronaut Reid Wiseman (out of frame), Expedition 40 flight engineer, conducted runs of the experiment, which examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity. The experiment is planned for guiding strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used in the design of fire detection and suppression systems in microgravity and on Earth.

  11. BASS Experiment Imagery

    NASA Image and Video Library

    2013-04-09

    ISS035-E-015930 (10 April 2013) --- This is one of a series of close-up images photographed during a run of the Burning and Suppression of Solids (BASS) experiment onboard the Earth-orbiting International Space Station. Following a series of preparations, NASA astronaut Chris Cassidy (out of frame) conducted several runs of the experiment, which examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity. The experiment is planned for guiding strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used in the design of fire detection and suppression systems in microgravity and on Earth.

  12. A Colorful Experiment

    ERIC Educational Resources Information Center

    Hunter, C. Bruce

    1978-01-01

    This experiment, mixing solutions of potassium iodide and lead nitrate to give a bright yellow lead iodide precipitate, often leads students into other topics such as making paint from the precipitate. (BB)

  13. [Mechanical staplers. Personal experience].

    PubMed

    Carzaniga, P L; Gatti, A; Russo, F; Sforza, M; Vertemati, G

    1992-12-01

    The Authors briefly summarise their experience of using various types of mechanical staplers in abdominal and thoracic surgery with excellent results both in general and in terms of reducing operating times.

  14. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1979

    1979-01-01

    Explains how to demonstrate the following: the hysteresis effect and the existence of domains in Rochelle salt (sodium potassium tartrate); diffraction experiments using a slide with multiple slits; and an analogue technique for learning terminal velocity. (GA)

  15. A Sea Experience.

    ERIC Educational Resources Information Center

    Glickstein, Neil

    1989-01-01

    Described is a teacher education program organized by the Sea Education Association in Woods Hole (Massachusetts). The experience, including activities and examples of studies conducted, is discussed. Contact information for future cruises is included. (CW)

  16. Experiments with needle bearings

    NASA Technical Reports Server (NTRS)

    Ferretti, Pericle

    1933-01-01

    Experiments and results are presented in testing needle bearings, especially in comparison with roller bearings. Reduction in coefficient of friction is discussed as well as experimental methods and recording devices.

  17. Foraging Experiences with Children

    ERIC Educational Resources Information Center

    Russell, Helen Ross

    1976-01-01

    Provided are foraging experiences and wild foods information for utilization in the urban school curriculum. Food uses are detailed for roses, dandelions, wild onions, acorns, cattails, violets and mints. (BT)

  18. A Colorful Experiment

    ERIC Educational Resources Information Center

    Hunter, C. Bruce

    1978-01-01

    This experiment, mixing solutions of potassium iodide and lead nitrate to give a bright yellow lead iodide precipitate, often leads students into other topics such as making paint from the precipitate. (BB)

  19. Experimenting with Detergents

    ERIC Educational Resources Information Center

    Mitchell, Gail; Phillips, Donald B.

    1977-01-01

    Lists materials and procedures for experimenting with detergents. Included are methods for determination of the densities of dry detergents, ph values of detergent solutions, and a discussion of the ability of detergents to remove iodine stains from cloth. (CS)

  20. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1986

    1986-01-01

    Describes (1) computer graphics for the coefficient of restitution; (2) an experiment on the optical processing of images; and (3) a simple, coherent optical system for character recognition using Polaroid (Type 665) negative film. (JN)

  1. Celestial mechanics experiment

    NASA Technical Reports Server (NTRS)

    Lorell, J.; Anderson, J. D.; Jordan, J. F.; Reasenberg, R. D.; Shapiro, I. I.

    1973-01-01

    The efforts and accomplishments of the CME Team are summarized. The objectives and experiment status, gravity field of Mars, test of general relativity, and the generation of normal points are discussed.

  2. Experiments with a sunbird

    NASA Astrophysics Data System (ADS)

    Güémez, J.; Valiente, R.; Fiolhais, C.; Fiolhais, M.

    2003-12-01

    A theoretical description of the sunbird, a drinking bird without any external liquid, is compared with experiment. The transient times and the periods of oscillation given by a simulation of the dynamics agree with the measured values.

  3. Illustrating the Classical Experiment.

    ERIC Educational Resources Information Center

    Zeller, Richard A.

    1988-01-01

    Describes an activity that (1) illustrates the classical experiment as a research tool; (2) demonstrates the interplay among hypotheses, methods, and data; and (3) nurtures the excitement of a method of study. (BSR)

  4. The monsoon experiment MONEX

    NASA Technical Reports Server (NTRS)

    Das, P. K.

    1979-01-01

    The effects of monsoons in different parts of the world on the Earth's atmosphere were studied by MONEX, India's Monsoon Experiment program. Data were gathered from meteorological satellites, sounding rockets, aircraft, land and shipborne stations.

  5. Experiments in Animal Behavior

    ERIC Educational Resources Information Center

    Polt, James M.

    1971-01-01

    Describes experiments in conditioning, sensory processes, social behavior, imprinting, innate preferences for color and form, and discrimination learning suitable for secondary school students. Mealworms, crickets, and chicks are used as subjects. (AL)

  6. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1989

    1989-01-01

    Introduced are two experiments: radon detection method shows real data using vacuum cleaner, soft toilet paper, and Geiger-Muller tube; critical potentials measurement describes the operation of Teltron tube with VELA. (YP)

  7. The Madison Dynamo Experiment

    NASA Astrophysics Data System (ADS)

    Kendrick, R. D.

    2005-10-01

    A spherical dynamo experiment has been constructed at the University of Wisconsin-Madison's liquid-sodium facility. The experiment is designed to self-generate magnetic fields from flows of conducting metal. The apparatus consists of a 1 m diameter, spherical stainless steel vessel filled with liquid sodium. Two 100 Hp motors drive impellers which generate the flow. The motors have been operated up to 1200 RPM (60% of design specification), achieving a magnetic Reynolds number of 130, based on impeller tip speed. Various polarizations of external magnetic fields have been applied to the sodium, and the induced magnetic field has been measured by both internal and external Hall probe arrays. Cavitation of the sodium is monitored using an ultrasonic transducer and suppressed through pressurization. Operating parameters and performance of the experiment are presented. Future plans for the experiment are discussed.

  8. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1986

    1986-01-01

    Describes (1) computer graphics for the coefficient of restitution; (2) an experiment on the optical processing of images; and (3) a simple, coherent optical system for character recognition using Polaroid (Type 665) negative film. (JN)

  9. Experiments with Helmholtz Resonators.

    ERIC Educational Resources Information Center

    Greenslade, Thomas B., Jr.

    1996-01-01

    Presents experiments that use Helmholtz resonators and have been designed for a sophomore-level course in oscillations and waves. Discusses the theory of the Helmholtz resonator and resonance curves. (JRH)

  10. Dihalocarbene Insertion Experiment

    ERIC Educational Resources Information Center

    Goh, S. H.

    1975-01-01

    Describes the insertion reaction using the insertion of carbenes into carbon-hydrogen bonds as an example. Outlines an experiment that will illustrate dihalocarbene insertions into diisopropyl ether. (GS)

  11. Experimenting with Detergents

    ERIC Educational Resources Information Center

    Mitchell, Gail; Phillips, Donald B.

    1977-01-01

    Lists materials and procedures for experimenting with detergents. Included are methods for determination of the densities of dry detergents, ph values of detergent solutions, and a discussion of the ability of detergents to remove iodine stains from cloth. (CS)

  12. Foraging Experiences with Children

    ERIC Educational Resources Information Center

    Russell, Helen Ross

    1976-01-01

    Provided are foraging experiences and wild foods information for utilization in the urban school curriculum. Food uses are detailed for roses, dandelions, wild onions, acorns, cattails, violets and mints. (BT)

  13. Packed Bed Reactor Experiment

    NASA Image and Video Library

    The purpose of the Packed Bed Reactor Experiment in low gravity is to determine how a mixture of gas and liquid flows through a packed bed in reduced gravity. A packed bed consists of a metal pipe ...

  14. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1979

    1979-01-01

    Explains how to demonstrate the following: the hysteresis effect and the existence of domains in Rochelle salt (sodium potassium tartrate); diffraction experiments using a slide with multiple slits; and an analogue technique for learning terminal velocity. (GA)

  15. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1988

    1988-01-01

    Describes four physics experiments including "Investigation of Box Resonances Using a Micro"; "A Direct Reading Wattmeter, DC or AC"; "Exercises in the Application of Ohm's Law"; and "Hysteresis on Gas Discharges." Discusses procedures, instrumentation, and analysis in each example. (CW)

  16. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1988

    1988-01-01

    Describes three experiments: (1) "Liquid Flow from Orifices"; (2) "Microcomputer-Controlled Investigation of Battery Discharge and Recovery"; and (3) "Measurement of the Speed of Sound." Drawings and diagrams accompany each. (RT)

  17. Experiments in Animal Behavior

    ERIC Educational Resources Information Center

    Polt, James M.

    1971-01-01

    Describes experiments in conditioning, sensory processes, social behavior, imprinting, innate preferences for color and form, and discrimination learning suitable for secondary school students. Mealworms, crickets, and chicks are used as subjects. (AL)

  18. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1989

    1989-01-01

    Introduced are two experiments: radon detection method shows real data using vacuum cleaner, soft toilet paper, and Geiger-Muller tube; critical potentials measurement describes the operation of Teltron tube with VELA. (YP)

  19. Reid BCAT Experiment

    NASA Image and Video Library

    2014-06-17

    ISS040-E-013856 (17 June 2014) --- NASA astronaut Reid Wiseman, Expedition 40 flight engineer, conducts a session with the Binary Colloidal Alloy Test (BCAT) experiment at a workstation in the Harmony node of the International Space Station.

  20. The Freshman Year Experience.

    ERIC Educational Resources Information Center

    Gardner, John N.

    1986-01-01

    The movement to enhance the freshman year experience by changing the way institutions treat, welcome, assimilate, support, and inform freshman students is discussed and illustrated. The potential importance of the movement to admissions officers and registrars is emphasized. (MSE)

  1. MSG SAME Experiment

    NASA Image and Video Library

    2010-07-15

    ISS024-E-008351 (15 July 2010) --- NASA astronaut Shannon Walker, Expedition 24 flight engineer, works with the Smoke Aerosol Measurement Experiment (SAME) in the Microgravity Sciences Glovebox (MSG) located in the Columbus laboratory of the International Space Station.

  2. MSG SAME Experiment

    NASA Image and Video Library

    2010-07-14

    ISS024-E-008364 (14 July 2010)--- Astronaut Shannon Walker, Expedition 24 flight engineer, works on the Smoke Aerosol Measurement Experiment (SAME) inside the Microgravity Science Glovebox (MSG) in the European laboratory Columbus on the International Space Station.

  3. MSG SAME Experiment

    NASA Image and Video Library

    2010-07-14

    ISS024-E-008369 (14 July 2010)--- Astronaut Shannon Walker, Expedition 24 flight engineer, works on the Smoke Aerosol Measurement Experiment (SAME) inside the Microgravity Science Glovebox (MSG) in the European laboratory Columbus on the International Space Station.

  4. Electrophoresis experiment for space

    NASA Technical Reports Server (NTRS)

    Vanderhoff, J. W.; Micale, F. J.

    1976-01-01

    The Apollo 16 electrophoresis experiment was analyzed, demonstrating that the separation of the two different-size monodisperse latexes did indeed take place, but that the separation was obscured by the pronounced electroosmotic flow of the liquid medium. The results of this experiment, however, were dramatic since it is impossible to carry out a similar separation on earth. It can be stated unequivocally from this experiment that any electrophoretic separation will be enhanced under microgravity conditions. The only question is the degree of this enhancement, which can be expected to vary from one experimental technique to another. The low-electroosmotic-mobility coating (Z6040-MC) developed under this program was found to be suitable for a free-fluid electrophoretic separation such as the experiment designed for the ASTP flight. The problem with this coating, however, is that its permanency is limited because of the slow desorption of the methylcellulose from the coated surface.

  5. Experimenting with Apostatic Selection.

    ERIC Educational Resources Information Center

    Allen, J. A.; Cooper, J. M.

    1988-01-01

    Reviewed is some of the experimental evidence for apostatic selection from work with artificial prey. Guidelines for further experiments are suggested including experimental design, analysis, variables, and selection in the wild. (Author/CW)

  6. CCF Experiment #1

    NASA Image and Video Library

    Images from CCF camera during Experiment #1, or EU#1, square groove geometry operations. The free surface, or gas/liquid interface, assumes a curved shape under subcritical flow conditions as its m...

  7. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1988

    1988-01-01

    Describes four physics experiments including "Investigation of Box Resonances Using a Micro"; "A Direct Reading Wattmeter, DC or AC"; "Exercises in the Application of Ohm's Law"; and "Hysteresis on Gas Discharges." Discusses procedures, instrumentation, and analysis in each example. (CW)

  8. Experimenting with Apostatic Selection.

    ERIC Educational Resources Information Center

    Allen, J. A.; Cooper, J. M.

    1988-01-01

    Reviewed is some of the experimental evidence for apostatic selection from work with artificial prey. Guidelines for further experiments are suggested including experimental design, analysis, variables, and selection in the wild. (Author/CW)

  9. ACTS mobile SATCOM experiments

    NASA Technical Reports Server (NTRS)

    Abbe, Brian S.; Frye, Robert E.; Jedrey, Thomas C.

    1993-01-01

    Over the last decade, the demand for reliable mobile satellite communications (satcom) for voice, data, and video applications has increased dramatically. As consumer demand grows, the current spectrum allocation at L-band could become saturated. For this reason, NASA and the Jet Propulsion Laboratory are developing the Advanced Communications Technology Satellites (ACTS) mobile terminal (AMT) and are evaluating the feasibility of K/Ka-band (20/30 GHz) mobile satcom to meet these growing needs. U.S. industry and government, acting as co-partners, will evaluate K/Ka-band mobile satcom and develop new technologies by conducting a series of applications-oriented experiments. The ACTS and the AMT testbed will be used to conduct these mobile satcom experiments. The goals of the ACTS Mobile Experiments Program and the individual experiment configurations and objectives are further presented.

  10. Experiment-o-mania

    NASA Astrophysics Data System (ADS)

    Drndarski, Marina

    2015-04-01

    Every 21st century student is expected to develop science literacy skills. As this is not part of Serbian national curriculum yet, we decided to introduce it with this project. Experiment-o-mania provides students to experience science in different and exciting way. It makes opportunity for personalized learning offering space and time to ask (why, where, how, what if) and to try. Therefore, we empower young people with skills of experimenting, and they love science back. They ask questions, make hypothesis, make problems and solve them, make mistakes, discuss about the results. Subsequently this raises the students' interest for school curriculum. This vision of science teaching is associated with inquiry-based learning. Experiment-o-mania is the unique and recognizable teaching methodology for the elementary school Drinka Pavlović, Belgrade, Serbia. Experiment-o-mania implies activities throughout the school year. They are held on extra class sessions, through science experiments, science projects or preparations for School's Days of science. Students learn to ask questions, make observations, classify data, communicate ideas, conduct experiments, analyse results and make conclusions. All science teachers participate in designing activities and experiments for students in Experiment-o-mania teaching method. But they are not alone. Teacher of fine arts, English teachers and others also take part. Students have their representatives in this team, too. This is a good way to blend knowledge among different school subject and popularize science in general. All the experiments are age appropriate and related to real life situations, local community, society and the world. We explore Fibonacci's arrays, saving energy, solar power, climate change, environmental problems, pollution, daily life situations in the country or worldwide. We introduce great scientists as Nikola Tesla, Milutin Milanković and sir Isaac Newton. We celebrate all relevant international days, weeks

  11. ISE structural dynamic experiments

    NASA Technical Reports Server (NTRS)

    Lock, Malcolm H.; Clark, S. Y.

    1988-01-01

    The topics are presented in viewgraph form and include the following: directed energy systems - vibration issue; Neutral Particle Beam Integrated Space Experiment (NPB-ISE) opportunity/study objective; vibration sources/study plan; NPB-ISE spacecraft configuration; baseline slew analysis and results; modal contributions; fundamental pitch mode; vibration reduction approaches; peak residual vibration; NPB-ISE spacecraft slew experiment; goodbye ISE - hello Zenith Star Program.

  12. Spacelab J experiment descriptions

    NASA Technical Reports Server (NTRS)

    Miller, Teresa Y. (Editor)

    1993-01-01

    Brief descriptions of the experiment investigations for the Spacelab J Mission which was launched from the Kennedy Space Center aboard the Endeavour in Sept. 1992 are presented. Experiments cover the following: semiconductor crystals; single crystals; superconducting composite materials; crystal growth; bubble behavior in weightlessness; microgravity environment; health monitoring of Payload Specialists; cultured plant cells; effect of low gravity on calcium metabolism and bone formation; and circadian rhythm.

  13. Capillary Flow Experiment

    NASA Image and Video Library

    2014-06-19

    ISS040-E-015545 (19 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, conducts a session with the Capillary Flow Experiment (CFE-2) in the Harmony node of the International Space Station. CFE is a suite of fluid physics experiments that investigate how fluids behave in microgravity which could benefit water and fuel delivery systems on future spacecraft. Scientists designed the CFE-2 to study properties of fluids and bubbles inside containers with a specific 3-D geometry.

  14. Capillary Flow Experiment

    NASA Image and Video Library

    2014-06-19

    ISS040-E-015539 (19 June 2014) --- NASA astronaut Reid Wiseman, Expedition 40 flight engineer, conducts a session with the Capillary Flow Experiment (CFE-2) in the Harmony node of the International Space Station. CFE is a suite of fluid physics experiments that investigate how fluids behave in microgravity which could benefit water and fuel delivery systems on future spacecraft. Scientists designed the CFE-2 to study properties of fluids and bubbles inside containers with a specific 3-D geometry.

  15. ISE structural dynamic experiments

    NASA Technical Reports Server (NTRS)

    Lock, Malcolm H.; Clark, S. Y.

    1988-01-01

    The topics are presented in viewgraph form and include the following: directed energy systems - vibration issue; Neutral Particle Beam Integrated Space Experiment (NPB-ISE) opportunity/study objective; vibration sources/study plan; NPB-ISE spacecraft configuration; baseline slew analysis and results; modal contributions; fundamental pitch mode; vibration reduction approaches; peak residual vibration; NPB-ISE spacecraft slew experiment; goodbye ISE - hello Zenith Star Program.

  16. Spacelab J experiment descriptions

    SciTech Connect

    Miller, T.Y.

    1993-08-01

    Brief descriptions of the experiment investigations for the Spacelab J Mission which was launched from the Kennedy Space Center aboard the Endeavour in Sept. 1992 are presented. Experiments cover the following: semiconductor crystals; single crystals; superconducting composite materials; crystal growth; bubble behavior in weightlessness; microgravity environment; health monitoring of Payload Specialists; cultured plant cells; effect of low gravity on calcium metabolism and bone formation; and circadian rhythm. Separate abstracts have been prepared for articles from this report.

  17. Hamlet and psychoanalytic experience.

    PubMed

    Schwaber, Paul

    2007-01-01

    Hamlet draws us into its rendered world, enabling us to experience it with depth, awareness, and resonance, in a mode we recognize as aesthetic. By way of Shakespeare's play--primarily the first act--and a detailed case study, aesthetic and psychoanalytic experience are compared, to suggest that, for our own analytic discourse, we revalue Freud's unease that his case studies read like short stories.

  18. CFE-2 Experiment Run

    NASA Image and Video Library

    2013-11-11

    ISS038-E-000263 (11 Nov. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, conducts a session with the Capillary Flow Experiment (CFE) in the Harmony node of the International Space Station. CFE is a suite of fluid physics experiments that investigate how fluids move up surfaces in microgravity. The results aim to improve current computer models that are used by designers of low gravity fluid systems and may improve fluid transfer systems for water on future spacecraft.

  19. CFE-2 Experiment Run

    NASA Image and Video Library

    2013-11-11

    ISS038-E-000269 (11 Nov. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, conducts a session with the Capillary Flow Experiment (CFE) in the Harmony node of the International Space Station. CFE is a suite of fluid physics experiments that investigate how fluids move up surfaces in microgravity. The results aim to improve current computer models that are used by designers of low gravity fluid systems and may improve fluid transfer systems for water on future spacecraft.

  20. Capillary Flow Experiment

    NASA Image and Video Library

    2014-06-19

    ISS040-E-015523 (19 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, conducts a session with the Capillary Flow Experiment (CFE-2) in the Harmony node of the International Space Station. CFE is a suite of fluid physics experiments that investigate how fluids behave in microgravity which could benefit water and fuel delivery systems on future spacecraft. Scientists designed the CFE-2 to study properties of fluids and bubbles inside containers with a specific 3-D geometry.

  1. Capillary Flow Experiment

    NASA Image and Video Library

    2014-06-19

    ISS040-E-015536 (19 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, conducts a session with the Capillary Flow Experiment (CFE-2) in the Harmony node of the International Space Station. CFE is a suite of fluid physics experiments that investigate how fluids behave in microgravity which could benefit water and fuel delivery systems on future spacecraft. Scientists designed the CFE-2 to study properties of fluids and bubbles inside containers with a specific 3-D geometry.

  2. Capillary Flow Experiment

    NASA Image and Video Library

    2014-06-19

    ISS040-E-015532 (19 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, conducts a session with the Capillary Flow Experiment (CFE-2) in the Harmony node of the International Space Station. CFE is a suite of fluid physics experiments that investigate how fluids behave in microgravity which could benefit water and fuel delivery systems on future spacecraft. Scientists designed the CFE-2 to study properties of fluids and bubbles inside containers with a specific 3-D geometry.

  3. Wiseman during BASS experiment

    NASA Image and Video Library

    2014-07-02

    ISS040-E-031397 (2 July 2014) --- NASA astronaut Reid Wiseman, Expedition 40 flight engineer, works with a combustion experiment known as the Burning and Suppression of Solids (BASS) in the Microgravity Science Glovebox (MSG) in the Destiny laboratory of the International Space Station. The experiment seeks to provide insight on how flames burn in space compared to Earth which may provide fire safety benefits aboard future spacecraft.

  4. Capillary Flow Experiment

    NASA Image and Video Library

    2014-06-19

    ISS040-E-015543 (19 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, conducts a session with the Capillary Flow Experiment (CFE-2) in the Harmony node of the International Space Station. CFE is a suite of fluid physics experiments that investigate how fluids behave in microgravity which could benefit water and fuel delivery systems on future spacecraft. Scientists designed the CFE-2 to study properties of fluids and bubbles inside containers with a specific 3-D geometry.

  5. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-16

    A researcher points out the trajectory of a weather pattern on a computer monitor during a flight aboard the NASA DC-8 aircraft, Tuesday, Aug. 17, 2010, over the Gulf of Mexico. Sceintists and researchers flew Tuesday to study weather as part of the Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  6. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-16

    Cloud formations are seen through the window of NASA DC-8 aircraft during a flight, Tuesday, Aug. 17, 2010, over the Gulf of Mexico where researchers were studying weather patterns as part of trhe Genesis and Rapid Intensification Processes (GRIP) experiment, a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  7. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-29

    The eye of Hurricane Earl in the Atlantic Ocean is seen from NASA’s DC-8 research aircraft, Monday, Aug. 30, 2010. This flight through the eyewall caught Earl just as it was intensifying from a Category 2 to a Category 4 hurricane. The flights are part of the Genesis and Rapid Intensification Processes (GRIP) experiment, a NASA Earth science field experiment being conducted to better understand how tropical storms form and develop into major hurricanes. (NASA/Jane Peterson)

  8. Accelerator Experiments for Astrophysics

    SciTech Connect

    Ng, J

    2003-10-15

    Many recent discoveries in astrophysics involve phenomena that are highly complex. Carefully designed experiments, together with sophisticated computer simulations, are required to gain insights into the underlying physics. We show that particle accelerators are unique tools in this area of research, by providing precision calibration data and by creating extreme experimental conditions relevant for astrophysics. In this paper we discuss laboratory experiments that can be carried out at the Stanford Linear Accelerator Center and implications for astrophysics.

  9. Advanced Doppler tracking experiments

    NASA Technical Reports Server (NTRS)

    Armstrong, J. W.

    1989-01-01

    The Doppler tracking method is currently the only technique available for broadband gravitational wave searches in the approx. 10(exp -4) to 10(exp -1) Hz low frequency band. A brief review is given of the Doppler method, a discussion of the main noise sources, and a review of experience with current spacecraft and the prospects for sensitivity improvements in an advanced Doppler tracking experiment.

  10. Prise en charge hospitalière de la malnutrition aigue sévère chez l'enfant avec des préparations locales alternatives aux F-75 et F-100: résultats et défis

    PubMed Central

    Nguefack, Félicitée; Adjahoung, Chritoph Akazong; Keugoung, Basile; Kamgaing, Nelly; Dongmo, Roger

    2015-01-01

    Introduction La mise en œuvre des directives de l'OMS permettrait de réduire significativement la mortalité hospitalière due à la malnutrition sévère. Cependant, elle n'est pas effective et la pénurie en aliments thérapeutiques est l'une des principales causes. L’étude décrit notre expérience sur la prise en charge hospitalière de la malnutrition aigue sévère avec des laits alternatifs aux F75 et F100 composés localement. Méthodes Il s'agissait d'un essai clinique non randomisé. La prise en charge des patients utilisait les laits composés localement et une évaluation quotidienne du gain pondéral était faite. Résultats L’étude a porté sur 41 sujets âgés de 6 à 59 mois. Au total, 73,2% avaient le kwashiorkor-marasmique, 17,0% le kwashiorkor, 9,8% le marasme et 41,5% étaient infectés par le VIH. Nous avons noté une prise progressive du poids d'environ 10 g/kg/jour vers le 7ème jour et de 15 à 20 g/kg/jour en fin d'hospitalisation. Le taux de mortalité était de 21,9% soit une réduction de 8,4% des chiffres antérieurs. Conclusion Malgré les obstacles financiers liés au coût des ingrédients, les préparations lactées alternatives aux standards F75 et F100, sont adaptables dans notre contexte. En l'absence des formules standards de l'OMS et lorsque la référence vers une structure qui en disposent n'est pas possible, les préparations locales permettraient de réhabiliter efficacement les patients. D'autres recherches pointues permettraient de tirer les ingrédients uniquement de notre environnement. Elles contribueraient ainsi à minimiser les couts des préparations et de favoriser la pérennisation des laits thérapeutiques locaux. PMID:26587175

  11. The AvecNet Trial to assess whether addition of pyriproxyfen, an insect juvenile hormone mimic, to long-lasting insecticidal mosquito nets provides additional protection against clinical malaria over current best practice in an area with pyrethroid-resistant vectors in rural Burkina Faso: study protocol for a randomised controlled trial.

    PubMed

    Tiono, Alfred B; Pinder, Margaret; N'Fale, Sagnon; Faragher, Brian; Smith, Tom; Silkey, Mariabeth; Ranson, Hilary; Lindsay, Steve W

    2015-03-25

    . The step-wedge design is to measure the impact of an incrementally delivered environmental intervention where we expect the degree of control to be improved as more people use PPF-LLIN over a larger area. Trial findings will help inform policy makers on the effectiveness of PPF-LLIN nets for malaria control in areas of pyrethroid resistance. ISRCTN21853394 - AvecNet, registered on 3 April 2013.

  12. Détermination de la solubilité du tétrahydrothiophène (THT) liquide dans les principaux constituants du gaz naturel (CH4, CO2 et N2) au moyen d'un dispositif dynamique avec analyse chromatographique en ligne de la phase vapeur

    NASA Astrophysics Data System (ADS)

    Ghanem, G.; Tagand, G.; Loiseleur, H.; Ingrain, D.; Jose, J.

    1998-05-01

    Some odorous products as tetrahydrothiophene (THT) whose odour is perceived at low concentration, are injected in natural gas in order to odorize it. This artificial odorization allows to detect immediately any gas leak in atmosphere. The authors have measured the equilibrium compositions of gaseous phases for binaires THT-CH4, THT-N2 and THT-CO2 in the transport and distribution conditions of natural gas [ {1 < P (bar) < 60} and {-30 < t(^circ C) < 50}] . For this purpose an experimental device based on a principle of dynamic saturation coupled with an on-line gas chromatographic analysis was assembled and adjusted. Additional thermodynamic properties are required to know the molar composition of vapour phase. The authors have measured the THT vapour pressure and estimated the second virial coefficients. For the estimations it was necessary to know the critical values and the acentric factor that have been calculated with various correlations. Certains produits comme le tétrahydrothiophène (THT), dont l'odeur est perçue à faible teneur, sont injectés dans le gaz naturel en vue de son odorisation. Cette odorisation artificielle rend toute fuite éventuelle de gaz dans l'atmosphère immédiatement détectable. Les auteurs ont mesuré les compositions à l'équilibre des phases gaseuses des binaires THT-CH4, THT-N02 et THT-CO2 dans les conditions de transport et de distribution du gaz [ {1 < P (bar) < 60} and {-30 < t(^circ C) < 50}] . Dans ce but, un dispositif expérimental original basé sur un principe de saturation dynamique avec analyse chromatographique en ligne de la phase vapeur a été réalisé et mis au point. Des grandeurs thermodynamiques supplémentaires sont nécessaires pour atteindre les compositions molaires de la phase vapeur. Les auteurs ont mesuré les pressions de vapeur du THT et estimé les seconds coefficients du viriel. Ces estimations font intervenir les grandeurs critiques et facteurs acentriques qui ont été calculés par diverses

  13. Japanese Experiment Module arrival

    NASA Image and Video Library

    2007-03-29

    The Experiment Logistics Module Pressurized Section for the Japanese Experiment Module arrives at the Space Station Processing Facility for uncrating. The logistics module is one of the components of the Japanese Experiment Module or JEM, also known as Kibo, which means "hope" in Japanese. Kibo comprises six components: two research facilities -- the Pressurized Module and Exposed Facility; a Logistics Module attached to each of them; a Remote Manipulator System; and an Inter-Orbit Communication System unit. Kibo also has a scientific airlock through which experiments are transferred and exposed to the external environment of space. Kibo is Japan's first human space facility and its primary contribution to the station. Kibo will enhance the unique research capabilities of the orbiting complex by providing an additional environment in which astronauts can conduct science experiments. The various components of JEM will be assembled in space over the course of three Space Shuttle missions. The first of those three missions, STS-123, will carry the Experiment Logistics Module Pressurized Section aboard the Space Shuttle Endeavour, targeted for launch in 2007.

  14. Japanese Experiment Module arrival

    NASA Image and Video Library

    2007-03-29

    Inside the Space Station Processing Facility, workers monitor progress as a huge crane is used to remove the top of the crate carrying the Experiment Logistics Module Pressurized Section for the Japanese Experiment Module. The logistics module is one of the components of the Japanese Experiment Module or JEM, also known as Kibo, which means "hope" in Japanese. Kibo comprises six components: two research facilities -- the Pressurized Module and Exposed Facility; a Logistics Module attached to each of them; a Remote Manipulator System; and an Inter-Orbit Communication System unit. Kibo also has a scientific airlock through which experiments are transferred and exposed to the external environment of space. Kibo is Japan's first human space facility and its primary contribution to the station. Kibo will enhance the unique research capabilities of the orbiting complex by providing an additional environment in which astronauts can conduct science experiments. The various components of JEM will be assembled in space over the course of three Space Shuttle missions. The first of those three missions, STS-123, will carry the Experiment Logistics Module Pressurized Section aboard the Space Shuttle Endeavour, targeted for launch in 2007.

  15. Japanese Experiment Module arrival

    NASA Image and Video Library

    2007-03-29

    Inside the Space Station Processing Facility, the Experiment Logistics Module Pressurized Section for the Japanese Experiment Module is revealed after the top of the crate is removed. The logistics module is one of the components of the Japanese Experiment Module or JEM, also known as Kibo, which means "hope" in Japanese. Kibo comprises six components: two research facilities -- the Pressurized Module and Exposed Facility; a Logistics Module attached to each of them; a Remote Manipulator System; and an Inter-Orbit Communication System unit. Kibo also has a scientific airlock through which experiments are transferred and exposed to the external environment of space. Kibo is Japan's first human space facility and its primary contribution to the station. Kibo will enhance the unique research capabilities of the orbiting complex by providing an additional environment in which astronauts can conduct science experiments. The various components of JEM will be assembled in space over the course of three Space Shuttle missions. The first of those three missions, STS-123, will carry the Experiment Logistics Module Pressurized Section aboard the Space Shuttle Endeavour, targeted for launch in 2007.

  16. Japanese Experiment Module arrival

    NASA Image and Video Library

    2007-03-29

    The Experiment Logistics Module Pressurized Section for the Japanese Experiment Module arrives at the Space Station Processing Facility. The logistics module is one of the components of the Japanese Experiment Module or JEM, also known as Kibo, which means "hope" in Japanese. Kibo comprises six components: two research facilities -- the Pressurized Module and Exposed Facility; a Logistics Module attached to each of them; a Remote Manipulator System; and an Inter-Orbit Communication System unit. Kibo also has a scientific airlock through which experiments are transferred and exposed to the external environment of space. Kibo is Japan's first human space facility and its primary contribution to the station. Kibo will enhance the unique research capabilities of the orbiting complex by providing an additional environment in which astronauts can conduct science experiments. The various components of JEM will be assembled in space over the course of three Space Shuttle missions. The first of those three missions, STS-123, will carry the Experiment Logistics Module Pressurized Section aboard the Space Shuttle Endeavour, targeted for launch in 2007.

  17. Skylab sleep monitoring experiment (experiment M133)

    NASA Technical Reports Server (NTRS)

    Frost, J. D., Jr.

    1975-01-01

    A summary of the conceptual design of the Skylab sleep monitoring experiment and a comprehensive compilation of the data-analysis results from the three Skylab missions is presented. One astronaut was studied per flight, electroencephalographic, electro-oculographic, and headmotion signals acquired during sleep by use of an elastic recording cap containing sponge electrodes and an attached miniature preamplifier/accelerometer unit are shown. A control-panel assembly, mounted in the sleep compartment, tested electrodes, preserved analog signals, and automatically analyzed data in real time (providing a telemetered indication of sleep stage). Results indicate that men are able to obtain adequate sleep in regularly scheduled eight-hour rest periods during extended space missions.

  18. Virginia precipitation scatter experiment: Experiment description

    NASA Technical Reports Server (NTRS)

    Levine, E.; Crane, R. K.; Wells, P.; Downey, F. X.

    1972-01-01

    A year's statistical data were acquired for the purposed of refining existing coordination procedures for the sharing of common frequency allocations between terrestrial and space services. The measurement program was conducted between October 3, 1970 and October 2, 1971, to empirically determine the cumulative distributions of scattering cross section per unit volume of hydrometeors at heights up to 9 km above the surface and of rain rate at the surface. The measurements were made in southeastern Virginia using a bistatic, continuous-wave, vertically polarized radar system operating at S- and X-band frequencies and tipping-bucket rain gages. The bistatic radar system was configured to represent an interference situation between a radio-relay system and a space communication system Earth terminal; the results may be interpreted as measured distributions of transmission loss for interference due to rain. A description of the experiment and equipment is included.

  19. Modal identification experiment

    NASA Technical Reports Server (NTRS)

    Kvaternik, Raymond G.

    1992-01-01

    The Modal Identification Experiment (MIE) is a proposed on-orbit experiment being developed by NASA's Office of Aeronautics and Space Technology wherein a series of vibration measurements would be made on various configurations of Space Station Freedom (SSF) during its on-orbit assembly phase. The experiment is to be conducted in conjunction with station reboost operations and consists of measuring the dynamic responses of the spacecraft produced by station-based attitude control system and reboost thrusters, recording and transmitting the data, and processing the data on the ground to identify the natural frequencies, damping factors, and shapes of significant vibratory modes. The experiment would likely be a part of the Space Station on-orbit verification. Basic research objectives of MIE are to evaluate and improve methods for analytically modeling large space structures, to develop techniques for performing in-space modal testing, and to validate candidate techniques for in-space modal identification. From an engineering point of view, MIE will provide the first opportunity to obtain vibration data for the fully-assembled structure because SSF is too large and too flexible to be tested as a single unit on the ground. Such full-system data is essential for validating the analytical model of SSF which would be used in any engineering efforts associated with structural or control system changes that might be made to the station as missions evolve over time. Extensive analytical simulations of on-orbit tests, as well exploratory laboratory simulations using small-scale models, have been conducted in-house and under contract to develop a measurement plan and evaluate its potential performance. In particular, performance trade and parametric studies conducted as part of these simulations were used to resolve issues related to the number and location of the measurements, the type of excitation, data acquisition and data processing, effects of noise and nonlinearities

  20. Experiments in Computing: A Survey

    PubMed Central

    Moisseinen, Nella

    2014-01-01

    Experiments play a central role in science. The role of experiments in computing is, however, unclear. Questions about the relevance of experiments in computing attracted little attention until the 1980s. As the discipline then saw a push towards experimental computer science, a variety of technically, theoretically, and empirically oriented views on experiments emerged. As a consequence of those debates, today's computing fields use experiments and experiment terminology in a variety of ways. This paper analyzes experimentation debates in computing. It presents five ways in which debaters have conceptualized experiments in computing: feasibility experiment, trial experiment, field experiment, comparison experiment, and controlled experiment. This paper has three aims: to clarify experiment terminology in computing; to contribute to disciplinary self-understanding of computing; and, due to computing's centrality in other fields, to promote understanding of experiments in modern science in general. PMID:24688404

  1. Experiments in computing: a survey.

    PubMed

    Tedre, Matti; Moisseinen, Nella

    2014-01-01

    Experiments play a central role in science. The role of experiments in computing is, however, unclear. Questions about the relevance of experiments in computing attracted little attention until the 1980s. As the discipline then saw a push towards experimental computer science, a variety of technically, theoretically, and empirically oriented views on experiments emerged. As a consequence of those debates, today's computing fields use experiments and experiment terminology in a variety of ways. This paper analyzes experimentation debates in computing. It presents five ways in which debaters have conceptualized experiments in computing: feasibility experiment, trial experiment, field experiment, comparison experiment, and controlled experiment. This paper has three aims: to clarify experiment terminology in computing; to contribute to disciplinary self-understanding of computing; and, due to computing's centrality in other fields, to promote understanding of experiments in modern science in general.

  2. National Flood Interoperability Experiment

    NASA Astrophysics Data System (ADS)

    Maidment, D. R.

    2014-12-01

    The National Flood Interoperability Experiment is led by the academic community in collaboration with the National Weather Service through the new National Water Center recently opened on the Tuscaloosa campus of the University of Alabama. The experiment will also involve the partners in IWRSS (Integrated Water Resources Science and Services), which include the USGS, the Corps of Engineers and FEMA. The experiment will address the following questions: (1) How can near-real-time hydrologic forecasting at high spatial resolution, covering the nation, be carried out using the NHDPlus or next generation geofabric (e.g. hillslope, watershed scales)? (2) How can this lead to improved emergency response and community resilience? (3) How can improved an improved interoperability framework support the first two goals and lead to sustained innovation in the research to operations process? The experiment will run from September 2014 through August 2015, in two phases. The mobilization phase from September 2014 until May 2015 will assemble the components of the interoperability framework. A Summer Institute to integrate the components will be held from June to August 2015 at the National Water Center involving faculty and students from the University of Alabama and other institutions coordinated by CUAHSI. It is intended that the insight that arises from this experiment will help lay the foundation for a new national scale, high spatial resolution, near-real-time hydrologic simulation system for the United States.

  3. FIRE Arctic Clouds Experiment

    NASA Technical Reports Server (NTRS)

    Curry, J. A.; Hobbs, P. V.; King, M. D.; Randall, D. A.; Minnis, P.; Issac, G. A.; Pinto, J. O.; Uttal, T.; Bucholtz, A.; Cripe, D. G.; hide

    1998-01-01

    An overview is given of the First ISCCP Regional Experiment (FIRE) Arctic Clouds Experiment that was conducted in the Arctic during April through July, 1998. The principal goal of the field experiment was to gather the data needed to examine the impact of arctic clouds on the radiation exchange between the surface, atmosphere, and space, and to study how the surface influences the evolution of boundary layer clouds. The observations will be used to evaluate and improve climate model parameterizations of cloud and radiation processes, satellite remote sensing of cloud and surface characteristics, and understanding of cloud-radiation feedbacks in the Arctic. The experiment utilized four research aircraft that flew over surface-based observational sites in the Arctic Ocean and Barrow, Alaska. In this paper we describe the programmatic and science objectives of the project, the experimental design (including research platforms and instrumentation), conditions that were encountered during the field experiment, and some highlights of preliminary observations, modelling, and satellite remote sensing studies.

  4. Cryogenic fluid management experiment

    NASA Technical Reports Server (NTRS)

    Eberhardt, R. N.; Bailey, W. J.; Fester, D. A.

    1981-01-01

    The cryogenic fluid management experiment (CFME), designed to characterize subcritical liquid hydrogen storage and expulsion in the low-q space environment, is discussed. The experiment utilizes a fine mesh screen fluid management device to accomplish gas-free liquid expulsion and a thermodynamic vent system to intercept heat leak and control tank pressure. The experiment design evolved from a single flight prototype to provision for a multimission (up to 7) capability. A detailed design of the CFME, a dynamic test article, and dedicated ground support equipment were generated. All materials and parts were identified, and components were selected and specifications prepared. Long lead titanium pressurant spheres and the flight tape recorder and ground reproduce unit were procured. Experiment integration with the shuttle orbiter, Spacelab, and KSC ground operations was coordinated with the appropriate NASA centers, and experiment interfaces were defined. Phase 1 ground and flight safety reviews were conducted. Costs were estimated for fabrication and assembly of the CFME, which will become the storage and supply tank for a cryogenic fluid management facility to investigate fluid management in space.

  5. IBEX magnetic coupling experiments

    SciTech Connect

    Frost, C.A.; Kiekel, P.D.; Miller, R.B.; Ekdahl, C.A.; Wagner, J.; Ramirez, J.J.

    1985-01-01

    The magnetic coupling of one pulse to another is a key issue for some modes of high-current beam propagation. Experiments are in progress on Sandia's IBEX accelerator to address issues relevant to magnetic coupling. The IBEX experiments differ from previous experiments in that the B/sub theta/ field acting on the second pulse is the result of residual plasma current from the first pulse rather than current applied by an external means. This new feature makes the propagation sensitive to beam and plasma current profiles that are key to the physics of the magnetic coupling problem. These experiments do not attempt to study the air chemistry issues, as this would require much higher current densities than are available from IBEX. We are using the IBEX accelerator with a mismatched magnetized diode to produce two high-current pulses separated by approx.130 nsec. A pulse pair has been propagated over a 1.5-m path in low pressure air. Extraction of two pulses, each having different parameters, complicates the experiment but also provides new insight into the magnetic coupling proplem. 7 figs.

  6. Commercial Experiment Transporter: COMET

    SciTech Connect

    Wessling, F.C.; Robinson, M.; Martinez, R.S.; Gallimore, T.; Combs, N.

    1994-09-01

    A launch system consisting of ground-support equipment, a four-stage rocket, a service module, a recovery system and a recovery site, and an orbital operations center is being assembled. The system is designed to launch 818 kg (1800 lb) to a 552-km (300-n.mi.) low earth orbit at a 40-deg inclination. Experiment space exists in both the service module and the recovery system. The service module provides space for 68 kg (150 lb) of experiments plus telemetry services, attitude control, and power and uses no consumables to maintain attitude. Consequently, the service module can maintain orbit attitude for years. Power of 400 W is supplied by solar cells and batteries for both experiment operation and housekeeping. The recovery system houses an experiment carrier for 136 kg (300 lb) of experiments, a retro rocket, a heat shield, and a parachute. An orbital operations control center provides tracking, telemetry, and commanding for the satellite. The payloads are also briefly described. The first launch was scheduled for 1995.

  7. Research by retrieving experiments.

    PubMed

    Blagosklonny, Mikhail V

    2007-06-01

    Newton did not discover that apples fall: the information was available prior to his gravitational hypothesis. Hypotheses can be tested not only by performing experiments but also by retrieving experiments from the literature (via PubMed, for example). Here I show how disconnected facts from known data, if properly connected, can generate novel predictions testable in turn by other published data. With examples from cell cycle, aging, cancer and other fields of biology and medicine, I discuss how new knowledge was and will be derived from old information. Millions of experiments have been already performed to test unrelated hypotheses and the results of those experiments are available to 'test' your hypotheses too. But most data (99% by some estimates) remain unpublished, because they were negative, seemed of low priority, or did not fit the story. Yet for other investigators those data may be valuable. The well-known story of Franklin and Watson is a case in point. By making preliminary data widely available, 'data-owners' will benefit most, receiving the credit for otherwise unused results. If posted (pre-published) on searchable databases, these data may fuel thousands of projects without the need for repetitive experiments. Enormous 'pre-published' databases coupled with Google-like search engines can change the structure of scientific research, and shrinking funding will make this inevitable.

  8. Influence of the onsite experience on recreation experience preference judgments

    Treesearch

    William P. Stewart

    1992-01-01

    This study was designed to investigate the impact of actual experience on experience preference. Experience preference measurements were taken before and after a hiking experience. A shift between pre-activity and post-activity experience preference judgments was hypothesized due to the effect of psychological adjustment to reduce dissonance between pre-activity...

  9. The SIR-B science plan

    NASA Technical Reports Server (NTRS)

    1982-01-01

    The Shuttle Imaging Radar-B (SIR-B) will be the third in a series of spaceborne SAR experiments conducted by NASA which began with the 1978 launch of SEASAT and continued with the 1981 launch of SIR-A. Like SEASAT and SIR-A, SIR-B will operate at L-band and will be horizontally polarized. However, SIR-B will allow digitally processed imagery to be acquired at selectable incidence angles between 15 and 60 deg, thereby permitting, for the first time, parametric studies of the effect of illumination geometry on SAR image information extraction. This document presents a science plan for SIR-B and serves as a reference for the types of geoscientific, sensor, and processing experiments which are possible.

  10. The investigation of selected oceanographic applications of spaceborne synthetic-aperture radar

    NASA Technical Reports Server (NTRS)

    Keyte, G. E.; Barber, B. C.; Barnes, M. B.; White, G. C.; Bagg, M.; Dolier, B.; Lynn, N.

    1984-01-01

    Synthetic aperture radar images obtained from Seasat and SIR-A showed that a number of oceanographic features were imaged in considerable detail, like internal waves, large ocean waves, bathymetric features, eddies, and slicks. the imaging mechanisms however, are not well understood, and for both SEASAT and SIR-A there are few supporting sea surface measurements to assist in the study of these imaging mechanisms. The SIR-B will conduct three separate experiments to provide a better understanding of the use of spaceborne SAR for imaging: (1) internal waves; (2) ocean surface waves, and (3) shallow water bathymetry. These experiments are chosen because they lead to possible applications for microwave remote sensing of the ocean surface and give a better understanding of the microwave/sea surface imaging mechanism.

  11. Japanese Experiment Module (JEM)

    NASA Technical Reports Server (NTRS)

    2003-01-01

    The Japanese Experiment Module (JEM) pressure module is removed from its shipping crate and moved across the floor of the Space Station Processing Facility at Kennedy Space Center (KSC) to a work stand. A research laboratory, the pressurized module is the first element of the JEM, named 'Kibo' (Hope) to arrive at KSC. Japan's primary contribution to the International Space Station, the module will enhance unique research capabilities of the orbiting complex by providing an additional environment in which astronauts will conduct experiments. The JEM also includes an exposed facility or platform for space environment experiments, a robotic manipulator system, and two logistics modules. The various JEM components will be assembled in space over the course of three Shuttle missions.

  12. KISMET tungsten dispersal experiment

    SciTech Connect

    Wohletz, K.; Kunkle, T.; Hawkins, W.

    1996-12-01

    Results of the KISMET tungsten dispersal experiment indicate a relatively small degree of wall-rock contamination caused by this underground explosive experiment. Designed as an add-on to the KISMET test, which was performed in the U-1a.02 drift of the LYNER facility at Nevada Test Site on 1 March 1995, this experiment involved recovery and analysis of wall-rock samples affected by the high- explosive test. The chemical, high-explosive blast drove tungsten powder, placed around the test package as a plutonium analog, into the surrounding wall- rock alluvium. Sample analyses by an analytical digital electron microscope (ADEM) show tungsten dispersed in the rock as tiny (<10 {mu}m) particles, agglomerates, and coatings on alluvial clasts. Tungsten concentrations, measured by energy dispersive spectral analysis on the ADEM, indicate penetration depths less than 0.1 m and maximum concentrations of 1.5 wt % in the alluvium.

  13. Japanese Experiment Module (JEM)

    NASA Technical Reports Server (NTRS)

    2003-01-01

    The Japanese Experiment Module (JEM) pressure module is removed from its shipping crate and moved across the floor of the Space Station Processing Facility at Kennedy Space Center (KSC) to a work stand. A research laboratory, the pressurized module is the first element of the JEM, named 'Kibo' (Hope) to arrive at KSC. Japan's primary contribution to the International Space Station, the module will enhance unique research capabilities of the orbiting complex by providing an additional environment in which astronauts will conduct experiments. The JEM also includes an exposed facility or platform for space environment experiments, a robotic manipulator system, and two logistics modules. The various JEM components will be assembled in space over the course of three Shuttle missions.

  14. Experiments in mixed reality

    NASA Astrophysics Data System (ADS)

    Krum, David M.; Sadek, Ramy; Kohli, Luv; Olson, Logan; Bolas, Mark

    2010-01-01

    As part of the Institute for Creative Technologies and the School of Cinematic Arts at the University of Southern California, the Mixed Reality lab develops technologies and techniques for presenting realistic immersive training experiences. Such experiences typically place users within a complex ecology of social actors, physical objects, and collections of intents, motivations, relationships, and other psychological constructs. Currently, it remains infeasible to completely synthesize the interactivity and sensory signatures of such ecologies. For this reason, the lab advocates mixed reality methods for training and conducts experiments exploring such methods. Currently, the lab focuses on understanding and exploiting the elasticity of human perception with respect to representational differences between real and virtual environments. This paper presents an overview of three projects: techniques for redirected walking, displays for the representation of virtual humans, and audio processing to increase stress.

  15. Electrophoresis experiments for space

    NASA Astrophysics Data System (ADS)

    Snyder, Robert S.; Rhodes, Percy H.

    2000-01-01

    It has long been hoped that space could alleviate the problems of large-scale, high-capacity electrophoresis. Support media and reduced chamber dimensions of capillary electrophoresis have established the physical boundaries for Earth-based systems. Ideally, electrophoresis conducted in a virtual weightless environment in an unrestricted ``free'' fluid should have great potential. The electrophoresis and isoelectric focusing experiments done in the reduced gravity over the past twenty-five years have demonstrated the absence of thermal convection and sedimentation as well as the presence of electrohydrodynamics that requires careful control. One commercial venture produced gram amounts of an electrophoretically purified protein during seven Space Shuttle flights but the market disappeared in the six years between experiment conception and performance on the Space Shuttle. Our accumulated experience in microgravity plus theoretical models predict improvements that should be possible with electrophoresis if past problems are considered and both invention of new technologies and innovation of procedures on the Space Station are encouraged. .

  16. Droplet Combustion Experiment movie

    NASA Technical Reports Server (NTRS)

    2003-01-01

    The Droplet Combustion Experiment (DCE) was designed to investigate the fundamental combustion aspects of single, isolated droplets under different pressures and ambient oxygen concentrations for a range of droplet sizes varying between 2 and 5 mm. The DCE principal investigator was Forman Williams, University of California, San Diego. The experiment was part of the space research investigations conducted during the Microgravity Science Laboratory-1 mission (STS-83, April 4-8 1997; the shortened mission was reflown as MSL-1R on STS-94). Advanced combustion experiments will be a part of investigations plarned for the International Space Station. (1.1 MB, 12-second MPEG, screen 320 x 240 pixels; downlinked video, higher quality not available)A still JPG composite of this movie is available at http://mix.msfc.nasa.gov/ABSTRACTS/MSFC-0300164.html.

  17. Future Experiments in Astrophysics

    NASA Technical Reports Server (NTRS)

    Krizmanic, John F.

    2002-01-01

    The measurement methodologies of astrophysics experiments reflect the enormous variation of the astrophysical radiation itself. The diverse nature of the astrophysical radiation, e.g. cosmic rays, electromagnetic radiation, and neutrinos, is further complicated by the enormous span in energy, from the 1.95 Kappa relic neutrino background to cosmic rays with energy greater than 10(exp 20)eV. The measurement of gravity waves and search for dark matter constituents are also of astrophysical interest. Thus, the experimental techniques employed to determine the energy of the incident particles are strongly dependent upon the specific particles and energy range to be measured. This paper summarizes some of the calorimetric methodologies and measurements planned by future astrophysics experiments. A focus will be placed on the measurement of higher energy astrophysical radiation. Specifically, future cosmic ray, gamma ray, and neutrino experiments will be discussed.

  18. Inflatable Antenna Experiment (IAE)

    NASA Image and Video Library

    1996-05-20

    S77-E-5033 (20 May 1996) --- Following its deployment from the Space Shuttle Endeavour, the Spartan 207/Inflatable Antenna Experiment (IAE) payload is backdropped against a wall of grayish clouds. The view was photographed with an Electronic Still Camera (ESC) and downlinked to flight controllers on the first full day of orbital operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  19. Inflatable Antenna Experiment (IAE)

    NASA Image and Video Library

    1996-05-20

    S77-E-5022 (20 May 1996)--- Following its deployment from the Space Shuttle Endeavour, the Spartan 207/Inflatable Antenna Experiment (IAE) payload is backdropped over clouds and water. The view was photographed with an Electronic Still Camera (ESC) and downlinked to flight controllers on the first full day of orbital operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  20. Inflatable Antenna Experiment (IAE)

    NASA Image and Video Library

    1996-05-20

    S77-E-5027 (20 May 1996)--- Following its deployment from the Space Shuttle Endeavour, the Spartan 207/Inflatable Antenna Experiment (IAE) payload is backdropped over clouds and water. The view was photographed with an Electronic Still Camera (ESC) and downlinked to flight controllers on the first full day of orbital operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  1. IAE - Inflatable Antenna Experiment

    NASA Image and Video Library

    1996-06-10

    STS077-705-004 (20 May 1996) --- Following its deployment from the Space Shuttle Endeavour, the Inflatable Antenna Experiment (IAE) portion of the Spartan 207 payload begins to inflate, backdropped against clouds over the Pacific Ocean. The view was photographed with a handheld 70mm camera during the first full day of orbital operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  2. IAE - Inflatable Antenna Experiment

    NASA Image and Video Library

    1996-06-10

    STS077-705-051 (20 May 1996) --- Following its deployment from the Space Shuttle Endeavour and its subsequent inflation process, the Spartan 207/Inflatable Antenna Experiment (IAE) payload is backdropped over mountains. The view was photographed with a handheld 70mm camera during the first full day of orbital operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  3. IAE - Inflatable Antenna Experiment

    NASA Image and Video Library

    1996-06-10

    STS077-705-012 (20 May 1996) --- Following its deployment from the Space Shuttle Endeavour, the Inflatable Antenna Experiment (IAE) portion of the Spartan 207 payload is backdropped over Earth as it continues its inflation process. The view was photographed with a handheld 70mm camera during the first full day of orbital operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  4. IAE - Inflatable Antenna Experiment

    NASA Image and Video Library

    1996-05-20

    STS077-150-022 (20 May 1996) --- After leaving the cargo bay of the Space Shuttle Endeavour, the Spartan 207/Inflatable Antenna Experiment (IAE) payload goes through the final stages its inflation process, backdropped over clouds and blue water. The view was photographed with a large format still camera on the first full day of in-space operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  5. IAE - Inflatable Antenna Experiment

    NASA Image and Video Library

    1996-05-20

    STS077-150-010 (20 May 1996) --- Soon after leaving the cargo bay of the Space Shuttle Endeavour, the Spartan 207/Inflatable Antenna Experiment (IAE) payload goes through its inflation process, backdropped over clouds. The view was photographed with a large format still camera on the first full day of in-space operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  6. IAE - Inflatable Antenna Experiment

    NASA Image and Video Library

    1996-05-20

    STS077-150-044 (20 May 1996) --- Following its deployment from the Space Shuttle Endeavour, the Spartan 207/Inflatable Antenna Experiment (IAE) payload is backdropped over the Grand Canyon. After the IAE completed its inflation process in free-flight, this view was photographed with a large format still camera. The activity came on the first full day of in-space operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  7. IAE - Inflatable Antenna Experiment

    NASA Image and Video Library

    1996-06-10

    STS077-705-016 (20 May 1996) --- Following its deployment from the Space Shuttle Endeavour, the Inflatable Antenna Experiment (IAE) part of the Spartan 207 payload nears completion of its inflation process over California?s Pacific Coast near Santa Barbara and Point Conception. The view was photographed with a handheld 70mm camera during the first full day of orbital operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  8. IAE - Inflatable Antenna Experiment

    NASA Image and Video Library

    1996-05-20

    STS077-150-094 (20 May 1996) --- Following its deployment from the Space Shuttle Endeavour, the Spartan 207/Inflatable Antenna Experiment (IAE) payload is backdropped over the Mississippi River and metropolitan St. Louis. The metropolitan area lies just below the gold-colored Spartan at bottom of photo. The view was photographed with a large format still camera on the first full day of in-space operations by the six-member crew. Managed by Goddard Space Flight Center (GSFC), Spartan is designed to provide short-duration, free-flight opportunities for a variety of scientific studies. The Spartan configuration on this flight is unique in that the IAE is part of an additional separate unit which is ejected once the experiment is completed. The IAE experiment will lay the groundwork for future technology development in inflatable space structures, which will be launched and then inflated like a balloon on-orbit.

  9. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-15

    Errol Korn, lower left, explains the dropsonde experiment to Janel Thomas, a University of Maryland Baltimore County (UMBC) graduate student, seated, as Bob Pasken, standing left, and Jeff Halverson, a GRIP project scientist from UMBC, look on inside NASA's DC-8 airplane, at Fort Lauderdale International Airport in Fort Lauderdale, Fla., Sunday, Aug. 15, 2010. The Genesis and Rapid Intensification Processes (GRIP) experiment is a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers) To read more about the GRIP Mission go here NASA Goddard Space Flight Center is home to the nation's largest organization of combined scientists, engineers and technologists that build spacecraft, instruments and new technology to study the Earth, the sun, our solar system, and the universe. Follow us on Twitter Join us on Facebook

  10. EXPERIMENTS - APOLLO 17

    NASA Image and Video Library

    1972-11-17

    S72-53471 (November 1972) --- The Infrared Scanning Radiometer, Experiment S-171, one of the lunar orbital science experiments which will be mounted in the SIM bay of the Apollo 17 Service Module. The ISR experiment will provide a lunar surface temperature map with improved temperature and spatial resolution over what has been impossible before. Previous Earth-based observations of the lunar surface thermal balance have been limited to the front side with a temperature resolution of about 210 degrees K (-80 degrees F) and a surface resolution of about 15 kilometers (9.3 miles). When correlated with orbital photography and lunar sounder data, ISR temperature measurements are expected to aid in locating surface rock fields, crustal structural differences, volcanic activity and fissures emitting "hot" gases.

  11. Droplet Combustion Experiment

    NASA Technical Reports Server (NTRS)

    2003-01-01

    The Droplet Combustion Experiment (DCE) was designed to investigate the fundamental combustion aspects of single, isolated droplets under different pressures and ambient oxygen concentrations for a range of droplet sizes varying between 2 and 5 mm. The DCE principal investigator was Forman Williams, University of California, San Diego. The experiment was part of the space research investigations conducted during the Microgravity Science Laboratory-1 mission (STS-83, April 4-8 1997; the shortened mission was reflown as MSL-1R on STS-94). Advanced combustion experiments will be a part of investigations plarned for the International Space Station. (199KB JPEG, 1311 x 1477 pixels; downlinked video, higher quality not available) The MPG from which this composite was made is available at http://mix.msfc.nasa.gov/ABSTRACTS/MSFC-0300165.html.

  12. Droplet Combustion Experiment

    NASA Technical Reports Server (NTRS)

    2003-01-01

    The Droplet Combustion Experiment (DCE) was designed to investigate the fundamental combustion aspects of single, isolated droplets under different pressures and ambient oxygen concentrations for a range of droplet sizes varying between 2 and 5 mm. The DCE principal investigator was Forman Williams, University of California, San Diego. The experiment was part of the space research investigations conducted during the Microgravity Science Laboratory-1R mission (STS-94, July 1-17 1997). Advanced combustion experiments will be a part of investigations plarned for the International Space Station. (120KB JPEG, 655 x 736 pixels; downlinked video, higher quality not available) The MPG from which this composite was made is available at http://mix.msfc.nasa.gov/ABSTRACTS/MSFC-0300167.html.

  13. The Nab experiment

    NASA Astrophysics Data System (ADS)

    Crawford, Christopher

    2012-10-01

    Neutron decay is a clean semi-leptonic process which depends on the vector GV and axial-vector GA coupling constants. The ratio λ= GA/GV, which can be extracted from various correlations in decay products of the neutron, is important for determination of Vud in unitarity tests of the CKM matrix, and to test extensions of the standard model. The goal of the newly funded Nab experiment is to measure the electron-neutrino decay correlation a with a relative uncertainty of 10-3, and the Fierz interference term b with an overall uncertainty of 3x10-3. This experiment uses a new technique to determine the electron-neutrino angle from the energy of the electron and proton, detected in coincidence. We will present the physical design and projected sensitivity of this experiment.

  14. An Organoleptic Laboratory Experiment

    NASA Astrophysics Data System (ADS)

    Risley, John M.

    1996-12-01

    Flavorings in foods and fragrances in personal care products is a topic often discussed in chemistry classes designed for the general education of non-science majors. A laboratory experiment has been designed to accompany the lecture topic. Compounds in ten different classes of organic molecules that are used in the fragrance and food industry are provided to students. Students whiff the vapors of each compound and describe the organoleptic properties using a set of terms utilized in the fragrance and food industry. A set of questions guides students to an understanding of the relationship between structure of molecules and smell. Students are permitted to create their own fragrance based on the results of the experiment. Student response has been favorable. The experiment rectifies misconceptions students have about structure and odor, and gives positive reinforcement to the lecture material.

  15. Light Microscopy Microscope Experiment

    NASA Image and Video Library

    2016-02-04

    Ground testing for the first confocal Light Microscopy Microscope (LMM) Experiment. Procter and Gamble is working with NASA Glenn scientists to prepare for a study that examines product stabilizers in a microgravity environment. The particles in the tube glow orange because they have been fluorescently tagged with a dye that reacts to green laser lights to allow construction of a 3D image point by point. The experiment, which will be sent to the ISS later this year, will help P&G develop improved product stabilizers to extend shelf life and develop more environmentally friendly packaging.

  16. Ti Hemi boombox experiment

    SciTech Connect

    Miller, Phillip Isaac; Hull, Lawrence Mark

    2015-05-14

    Previous deformation experiments in which IR imaging was used pointed to a correlation in between IR signature in areas where heat was expected to be. The surface is not uniform during deformation experiments which cause cracks in the image in areas with increased temperature. To measure temperature under dynamic conditions, simultaneous reflectivity and radiance measurement under events of interest is needed. To measure a temperature measurement, a Reflectance measurement taken by framing camera at the edge of the camera sensitivity (700nm). Allows relative measurement at this wavelength. At reasonable temperatures the spectral radiance should peak near 2u and be 3-4 orders of magnitude higher than at 700 nm.

  17. Experiment SPHERE status 2008

    NASA Astrophysics Data System (ADS)

    Shaulov, S. B.; Besshapov, S. P.; Kabanova, N. V.; Sysoeva, T. I.; Antonov, R. A.; Anyuhina, A. M.; Bronvech, E. A.; Chernov, D. V.; Galkin, V. I.; Tkaczyk, W.; Finger, M.; Sonsky, M.

    2009-12-01

    The expedition carried out in March, 2008 to Lake Baikal became an important stage in the development of the SPHERE experiment. During the expedition the SPHERE-2 installation was hoisted, for the first time, on a tethered balloon, APA, to a height of 700 m over the lake surface covered with ice and snow. A series of test measurements were made. Preliminary results of the data processing are presented. The next plan of the SPHERE experiment is to begin a set of statistics for constructing the CR spectrum in the energy range 10-10 eV.

  18. Experiments in autonomous robotics

    SciTech Connect

    Hamel, W.R.

    1987-01-01

    The Center for Engineering Systems Advanced Research (CESAR) is performing basic research in autonomous robotics for energy-related applications in hazardous environments. The CESAR research agenda includes a strong experimental component to assure practical evaluation of new concepts and theories. An evolutionary sequence of mobile research robots has been planned to support research in robot navigation, world sensing, and object manipulation. A number of experiments have been performed in studying robot navigation and path planning with planar sonar sensing. Future experiments will address more complex tasks involving three-dimensional sensing, dexterous manipulation, and human-scale operations.

  19. DEEP UNDERGROUND NEUTRINO EXPERIMENT

    SciTech Connect

    Wilson, Robert J.

    2016-03-03

    The Deep Underground Neutrino Experiment (DUNE) collaboration will perform an experiment centered on accelerator-based long-baseline neutrino studies along with nucleon decay and topics in neutrino astrophysics. It will consist of a modular 40-kt (fiducial) mass liquid argon TPC detector located deep underground at the Sanford Underground Research Facility in South Dakota and a high-resolution near detector at Fermilab in Illinois. This conguration provides a 1300-km baseline in a megawatt-scale neutrino beam provided by the Fermilab- hosted international Long-Baseline Neutrino Facility.

  20. Experiment in Water Dowsing

    DTIC Science & Technology

    1994-09-01

    0)0 "• •,• • -• )• .EEP C .7 7:i EXPERIMENT IN WATER DOWSING Til I"SIS EEDavid 1. (Gaisford. 1). E. AFIT/GEE/F.NS/94S-O I ~~m - DEPARTMENT... WATER DOWSING THESIS David I. Gaisford, P. E. AFIT/GEE/ENS/94S-01 Approved for Public Release; distribution unlimited =TC QUALITY pSP-ECTED 3 S0694-30622...Specils THESIS APPROVAL Student: David I. Gaisford Class: GEE 94S Thesis Title: Experiment in Water Dowsing Defense Date: 11 Aug 94 Committee Name

  1. Halogen lamp experiment, HALEX

    NASA Technical Reports Server (NTRS)

    Schmitt, G.; Stapelmann, J.

    1986-01-01

    The main purpose of the Halogen Lamp Experiment (HALEX) was to investigate the operation of a halogen lamp during an extended period in a microgravity environment and to prove its behavior in space. The Mirror Heating Facilities for Crystal Growth and Material Science Experiments in space relies on one or two halogen lamps as a furnace to melt the specimens. The HALEX aim is to verify: full power operation of a halogen lamp for a period of about 60 hours; achievement of about 10% of its terrestrial life span; and operation of the halogen lamp under conditions similar to furnace operation.

  2. Microwave PASER Experiment

    SciTech Connect

    Schoessow, P.; Kanareykin, A.; Antipov, S.; Poluektov, O.; Jing, C.

    2009-01-22

    The PASER (Particle Acceleration by Stimulated Emission of Radiation) concept for particle acceleration entails the direct transfer of energy from an active medium to a charged particle beam. The PASER was originally formulated for optical (laser) media; we are planning a PASER demonstration experiment based on an optically pumped X-band paramagnetic medium consisting of porphyrin or fullerene (C{sub 60}) derivatives in a toluene solution or polystyrene matrix. We discuss the background of this project and report on the status of the experiment to measure the acceleration of electrons using the microwave PASER.

  3. Experiments with nonneutral plasmas

    SciTech Connect

    O’Neil, T. M.

    2016-03-25

    Selected experiments with nonneutral plasmas are discussed. These include the laser cooling of a pure ion plasma to a crystalline state, a measurement of the Salpeter enhancement factor for fusion in a strongly correlated plasma and the measurement of thermally excited plasma waves. Also, discussed are experiments that demonstrate Landau damping, trapping and plasma wave echoes in the 2D ExB drift flow of a pure electron plasma, which is isomorphic to the 2D ideal flow (incompressible and inviscid flow) of a neutral fluid.

  4. World Ocean Circulation Experiment

    NASA Technical Reports Server (NTRS)

    Clarke, R. Allyn

    1992-01-01

    The oceans are an equal partner with the atmosphere in the global climate system. The World Ocean Circulation Experiment is presently being implemented to improve ocean models that are useful for climate prediction both by encouraging more model development but more importantly by providing quality data sets that can be used to force or to validate such models. WOCE is the first oceanographic experiment that plans to generate and to use multiparameter global ocean data sets. In order for WOCE to succeed, oceanographers must establish and learn to use more effective methods of assembling, quality controlling, manipulating and distributing oceanographic data.

  5. Experiments with RHIC

    SciTech Connect

    Westfall, Gary D.

    2000-12-31

    Experiments with the Relativistic Heavy Ion Collider (RHIC) will begin in December 1999. RHIC consists of two superconducting rings capable of accelerating and storing Au beams of 100 GeV/nucleon and proton beams of 250 GeV. Four experiments are being prepared for RHIC: STAR, PHENIX, PHOBOS, and BRAHMS. These detector systems are designed to search for signals of the quark gluon plasma in Au-Au collisions. A spin physics program using polarized protons will also be carried out at RHIC.

  6. NOSL experiment support

    NASA Technical Reports Server (NTRS)

    Brook, M.

    1986-01-01

    An optical lightning detector was constructed and flown, along with Vinton cameras and a Fairchild Line Scan Spectrometer, on a U-2 during the summer of 1979. The U-2 lightning data was obtained in daylight, and was supplemented with ground truth taken at Langmuir Laboratory. Simulations were prepared as required to establish experiment operating procedures and science training for the astronauts who would operate the Night/Day Optical Survey of Thunderstorm Lightning (NOSL) equipment during the STS-2 NOSL experiment on the Space Shuttle. Data was analyzed and papers were prepared for publication.

  7. Halogen lamp experiment, HALEX

    NASA Technical Reports Server (NTRS)

    Schmitt, G.; Stapelmann, J.

    1986-01-01

    The main purpose of the Halogen Lamp Experiment (HALEX) was to investigate the operation of a halogen lamp during an extended period in a microgravity environment and to prove its behavior in space. The Mirror Heating Facilities for Crystal Growth and Material Science Experiments in space relies on one or two halogen lamps as a furnace to melt the specimens. The HALEX aim is to verify: full power operation of a halogen lamp for a period of about 60 hours; achievement of about 10% of its terrestrial life span; and operation of the halogen lamp under conditions similar to furnace operation.

  8. The Archimedes experiment

    NASA Astrophysics Data System (ADS)

    Calloni, E.; Caprara, S.; Laurentis, M. De; Esposito, G.; Grilli, M.; Majorana, E.; Pepe, G. P.; Petrarca, S.; Puppo, P.; Rapagnani, P.; Ricci, F.; Rosa, L.; Rovelli, C.; Ruggi, P.; Saini, N. L.; Stornaiolo, C.; Tafuri, F.

    2016-07-01

    Archimedes is an INFN-funded pathfinder experiment aimed at verifying the feasibility of measuring the interaction of vacuum fluctuations with gravity. The final experiment will measure the force exerted by the gravitational field on a Casimir cavity whose vacuum energy is modulated with a superconductive transition, by using a balance as a small force detector. Archimedes is two-year project devoted to test the most critical experimental aspects, in particular the balance resonance frequency and quality factor, the thermal modulation efficiency and the superconductive sample realization.

  9. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-15

    Simone Tanelli, a researcher from the Jet Propulsion Laboratory, talks about the Airbrorne Precipitation Radar (APR-2) aboard the NASA DC-8 aircraft, Monday, Aug.16, 2010, at Fort Lauderdale Hollywood International Airport in Fort Lauderdale, Fla. The APR-2, a dual frequency weather radar, is just one of the experiments supporting the Genesis and Rapid Intensification Processes (GRIP) mission, a NASA Earth science field experiment that is being conducted to better understand how tropical storms form and develop into major hurricanes. Photo Credit: (NASA/Paul E. Alers)

  10. GRIP Experiment 2010

    NASA Image and Video Library

    2010-08-16

    An unidentified researcher looks over the wiring connecting the Airbrorne Precipitation Radar (APR-2) during a flight aboard the NASA DC-8 aircraft, Tuesday, Aug. 17, 2010, over the Gulf of Mexico. Scientists taking part in the Genesis and Rapid Intensification Processes (GRIP) experiment, a NASA Earth science field experiment in 2010 that is being conducted to better understand how tropical storms form and develop into major hurricanes, flew out over a weather pattern Tuesday to begin their research. Photo Credit: (NASA/Paul E. Alers)

  11. Chondrule Crystallization Experiments

    NASA Technical Reports Server (NTRS)

    Hweins, R. H.; Connolly, H. C., Jr.; Lofgren, G. E.; Libourel, G.

    2004-01-01

    Given the great diversity of chondrules, laboratory experiments are invaluable in yielding information on chondrule formation process(es) and for deciphering their initial conditions of formation together with their thermal history. In addition, they provide some critical parameters for astrophysical models of the solar system and of nebular disk evolution in particular (partial pressures, temperature, time, opacity, etc). Most of the experiments simulating chondrules have assumed formation from an aggregate of solid grains, with total pressure of no importance and with virtually no gain or loss of elements from or to the ambient environment. They used pressed pellets attached to wires and suffered from some losses of alkalis and Fe.

  12. Microgravity ignition experiment

    NASA Technical Reports Server (NTRS)

    Motevalli, Vahid; Elliott, William; Garrant, Keith

    1992-01-01

    The purpose of this project is to develop a flight ready apparatus of the microgravity ignition experiment for the GASCan 2 program. This involved redesigning, testing, and making final modifications to the existing apparatus. The microgravity ignition experiment is intended to test the effect of microgravity on the time to ignition of a sample of alpha-cellulose paper. An infrared heat lamp is used to heat the paper sample within a sealed canister. The interior of the canister was redesigned to increase stability and minimize conductive heat transfer to the sample. This design was fabricated and tested and a heat transfer model of the paper sample was developed.

  13. STELLA experiment: Hardware issues

    NASA Astrophysics Data System (ADS)

    Kusche, K. P.; Babzien, M.; Ben-Zvi, I.; Campbell, L. P.; Cline, D. B.; Fiorito, R. B.; Gallardo, J. C.; Gottschalk, S. C.; He, P.; Kimura, W. D.; Liu, Y.; Pantell, R. H.; Pogorelsky, I. V.; Quimby, D. C.; Robinson, K. E.; Rule, D. W.; Sandweiss, J.; Skaritka, J.; van Steenbergen, A.; Steinhauer, L. C.; Yakimenko, V.

    1999-07-01

    The STaged ELectron Laser Acceleration (STELLA) experiment is currently being assembled and tested at the BNL Accelerator Test Facility (ATF). The existing BNL inverse free electron laser (IFEL) has been positioned upstream of the inverse Cerenkov acceleration (ICA) experiment on Beamline #1. This beamline also features new quadrupoles and a new spectrometer capable of a +/-20% energy acceptance. A new laser beam transport system has been installed to permit accurate control of the laser phase for the laser beams sent to the IFEL and ICA devices. Detection of the microbunches will be performed using a coherent transition radiation (CTR) diagnostic similar to one already demonstrated at the ATF.

  14. AGS experiments: 1985, 1986, 1987

    SciTech Connect

    Depken, J.C.

    1987-01-01

    This report contains: Experimental areas layout, table of beam parameters and fluxes, experiment schedule ''as run,'' experiment long range schedule, a listing of experiments by number, two-page summaries of each experiment, also ordered by number, and publications of AGS experiments, 1982-1987.

  15. AGS experiments, 1988, 1989, 1990

    SciTech Connect

    Depken, J.C.

    1991-04-01

    This report contains: experimental areas layout; table of beam parameters and fluxes; experiment schedule as run''; experiment long range schedule; a listing of experiments by number; two-page summaries of each experiment begin here, also ordered by number; publications of AGS experiments; and list of experimenters.

  16. Anomalous Reflectivity Losses of Coated Mirrors Used in the Infrared,

    DTIC Science & Technology

    1982-01-01

    Fig 1 and Fig 2. Experi- mental observations of anomalous reflectivity losses are discussed in the next 1 paragraph. From Table 1 and the experimental... observations it can be seen that the losses occur for only one direction of polarisation Rp, and are not found at normal incidence. Also that the...protected aluminium (measured for us by SIRA institute (3 )) is illustrated in Fig 2 for comparison with the spectra calculated for Al + SiO and Al + SiO 2

  17. Spaceborne radar research in the 1980's

    NASA Technical Reports Server (NTRS)

    Elachi, C.

    1983-01-01

    The SEASAT SAR and Shuttle Imaging Radar SIR-A experiments demonstrated that spaceborne synthetic aperture radars provide synoptic images of land and ocean features. Radar images clearly show geologic structures, morphologic features, clear cutting, subsurface features (in very arid regions), agricultural and urban land use, ocean surface waves, current boundaries, internal waves, ice floes and numerous other ocean features which affect the surface roughness.

  18. Thermal Control Surfaces Experiment

    NASA Technical Reports Server (NTRS)

    Wilkes, D. R.

    1999-01-01

    This report is the final experiment report for the TCSE and summarizes many years of hardware development and analyses. Also included are analyses presented in a number of TCSE papers that were prepared and given at scientific conferences including three LDEF Post-Retrieval Symposiums.

  19. Learning Through Group Experience.

    ERIC Educational Resources Information Center

    Ottaway, A.K.C.

    This book recounts experiments with small groups of social workers and teachers who came together in order to improve their understanding of human relations and personality development. The technique employed can be called non-directive tutoring, and is a type of group-centered discussion. The role of the leader is to clarify and interpret what is…

  20. Northland Support Wilderness Experience.

    ERIC Educational Resources Information Center

    Ringer, Martin

    Northland Support Wilderness Experience (NSWE) was a bicultural (White and Maori) wilderness therapy program that operated in New Zealand from 1985 to 1990. NSWE conducted 11 wilderness expeditions per year with approximately 10 participants each, and provided 18-month followups for participants, parents, and significant others. Participants were…

  1. The Doppler Pendulum Experiment

    ERIC Educational Resources Information Center

    Lee, C. K.; Wong, H. K.

    2011-01-01

    An experiment to verify the Doppler effect of sound waves is described. An ultrasonic source is mounted at the end of a simple pendulum. As the pendulum swings, the rapid change of frequency can be recorded by a stationary receiver using a simple frequency-to-voltage converter. The experimental results are in close agreement with the Doppler…

  2. Experiment with Conical Pendulum

    ERIC Educational Resources Information Center

    Tongaonkar, S. S.; Khadse, V. R.

    2011-01-01

    Conical pendulum is similar to simple pendulum with the difference that the bob, instead of moving back and forth, swings around in a horizontal circle. Thus, in a conical pendulum the bob moves at a constant speed in a circle with the string tracing out a cone. This paper describes an experiment with conical pendulum, with determination of g from…

  3. Enhance Your Twitter Experience

    ERIC Educational Resources Information Center

    Miller, Shannon McClintock

    2010-01-01

    The author has been encouraging teachers, students, and others to join Twitter and build their personal learning networks (PLNs) ever since she delved into this great social networking site. In this article, she offers a few other tools and tips that can improve the Twitter experience of those who have opened up an account and dabbled a bit but…

  4. The Huck Finn Experience.

    ERIC Educational Resources Information Center

    Levesque, Bonnie; And Others

    This paper describes "The Huck Finn Experience," a high motivation interdisciplinary unit that takes students on a 6-week journey back to the life and times of Mark Twain through the fictional character of Huckleberry Finn. The unit described in the paper was designed for eighth-grade students but could be easily adapted to be successful…

  5. An NMR Kinetics Experiment.

    ERIC Educational Resources Information Center

    Kaufman, Don; And Others

    1982-01-01

    Outlines advantages of and provides background information, procedures, and typical student data for an experiment determining rate of hydration of p-methyoxyphenylacetylene (III), followed by nuclear magnetic resonance spectroscopy. Reaction rate can be adjusted to meet time framework of a particular laboratory by altering concentration of…

  6. A Simple Adsorption Experiment

    ERIC Educational Resources Information Center

    Guirado, Gonzalo; Ayllon, Jose A.

    2011-01-01

    The study of adsorption phenomenon is one of the most relevant and traditional physical chemistry experiments performed by chemistry undergraduate students in laboratory courses. In this article, we describe an easy, inexpensive, and straightforward way to experimentally determine adsorption isotherms using pieces of filter paper as the adsorbent…

  7. Experiments in Pulsed Ultrasonics

    ERIC Educational Resources Information Center

    Palmer, S. B.; Forster, G. A.

    1970-01-01

    Describes and apparatus designed to generate and detect pulsed ultrasonics in solids and liquids over the frequency range 1-20 MHz. Experiments are suggested for velocity of sound, elastic constant and ultrasonic attenuation measurements on various materials over a wide temperature range. The equipment should be useful for demonstration purposes.…

  8. Parent Hearing Aid Experiences

    ERIC Educational Resources Information Center

    Munoz, Karen; Roberts, Mallory; Mullings, Day; Harward, Richard

    2012-01-01

    This study addresses parent experiences in obtaining and managing hearing aids for their young child. The purpose was to identify challenges parents encounter to determine what state agencies can do to improve parent access to amplification. Data were collected July through September of 2010; 40 parents of children ages birth to 3 years old…

  9. InSPACE experiment

    NASA Image and Video Library

    2009-08-01

    ISS020-E-026859 (1 Aug. 2009) --- European Space Agency astronaut Frank De Winne, Expedition 20 flight engineer, works with the Investigating the Structure of Paramagnetic Aggregates from Colloidal Emulsions (InSPACE) experiment in the Microgravity Science Glovebox (MSG) in the Columbus laboratory of the International Space Station.

  10. Preliminary Advanced Colloids Experiment

    NASA Image and Video Library

    2011-09-29

    ISS029-E-011867 (29 Sept. 2011) --- NASA astronaut Mike Fossum, Expedition 29 commander, works with the Light Microscopy Module (LMM) control box in the Destiny laboratory of the International Space Station in preparation for another session with the Preliminary Advanced Colloids Experiment (PACE) hardware.

  11. InSPACE Experiment

    NASA Image and Video Library

    2012-12-31

    View of Command and Monitoring Panel (CMP),and Power Distribution and Conversion Box (PDC),on the Microgravity Science Glovebox (MSG) rack during Investigating the Structure of Paramagnetic Aggregates from Colloidal Emulsions 3 (InSPACE-3) Experiment,in the U.S. Laboratory. Photo was taken during Expedition 34.

  12. Notes on Experiments.

    ERIC Educational Resources Information Center

    Bligh, P. H.; And Others

    1988-01-01

    Introduces three physics experiments for high school and college classes. Topics include measuring the ratio of heat capacities using a microcomputer and a glass syringe, producing large electric sparks using a variation of a Leyden bucket, and observing transmission line behavior using television signals. Includes descriptions of materials and…

  13. Experiments with Aspirin.

    ERIC Educational Resources Information Center

    Borer, Londa L.; Barry, Edward

    2000-01-01

    Presents a series of experiments that can be used to demonstrate how aspirin can be synthesized and characterized, how the hydrolysis of aspirin can be used as an introduction to kinetics, and how coordination chemistry (chelation) can be introduced by preparing and characterizing the copper complexes of aspirin and salicylic acid. (Contains over…

  14. Electrophoresis experiments in microgravity

    NASA Technical Reports Server (NTRS)

    Snyder, Robert S.; Rhodes, Percy H.

    1991-01-01

    The use of the microgravity environment to separate and purify biological cells and proteins has been a major activity since the beginning of the NASA Microgravity Science and Applications program. Purified populations of cells are needed for research, transplantation and analysis of specific cell constituents. Protein purification is a necessary step in research areas such as genetic engineering where the new protein has to be separated from the variety of other proteins synthesized from the microorganism. Sufficient data are available from the results of past electrophoresis experiments in space to show that these experiments were designed with incomplete knowledge of the fluid dynamics of the process including electrohydrodynamics. However, electrophoresis is still an important separation tool in the laboratory and thermal convection does limit its performance. Thus, there is a justification for electrophoresis but the emphasis of future space experiments must be directed toward basic research with model experiments to understand the microgravity environment and fluid analysis to test the basic principles of the process.

  15. Experiments with isomeric beams

    NASA Astrophysics Data System (ADS)

    Pfützner, M.; Grzywacz, R.; Lewitowicz, M.; Rykaczewski, K.

    1997-02-01

    The results of the search for μs-isomers performed with 112Sn and 86Kr beams at 60 MeV/nucleon with the LISE3 spectrometer at GANIL are summarized. Planned extension of these studies to high energy fragmentation reactions with the FRS separator at GSI is described. Some perspectives for experiments with isomeric beams at GSI are mentioned.

  16. [Environmental Education Experiences].

    ERIC Educational Resources Information Center

    Burke County Board of Education, Morganton, NC.

    Environmental/ecological experiences, appropriate for elementary grades, are presented in this compilation. Designed as individual units of study, they consider components of the natural environment and in particular the local environment of Burke County, North Carolina. Units are titled: Burke County in a Nutshell, Our Culture, A Tour of the…

  17. Parent Hearing Aid Experiences

    ERIC Educational Resources Information Center

    Munoz, Karen; Roberts, Mallory; Mullings, Day; Harward, Richard

    2012-01-01

    This study addresses parent experiences in obtaining and managing hearing aids for their young child. The purpose was to identify challenges parents encounter to determine what state agencies can do to improve parent access to amplification. Data were collected July through September of 2010; 40 parents of children ages birth to 3 years old…

  18. Experiments in ESP.

    ERIC Educational Resources Information Center

    Guerin, Stephen M.; Guerin, Clark L.

    1979-01-01

    Discusses a phenomenon called Extrasensory Perception (ESP) whereby information is gained directly by the mind without the use of the ordinary senses. Experiments in ESP and the basic equipment and methods are presented. Statistical evaluation of ESP experimental results are also included. (HM)

  19. Experiments on Photoconductivity

    ERIC Educational Resources Information Center

    Kraftmakher, Yaakov

    2012-01-01

    Computer-assisted experiments with CdS and CdSe photoresistors are described. The most important characteristics of the photoresistors are determined: (i) the spectral response, (ii) the photocurrent versus incident radiant power, (iii) the rise and decay time constants and (iv) the frequency response to modulated light. The photoconductivity gain…

  20. Investigating the Human Experience

    ERIC Educational Resources Information Center

    Ducote, Richard L.; Peterson, Robert E.

    1975-01-01

    A project entitled "Investigating the Human Experience," which was funded by the National Endowment for the Humanities, enables the College of DuPage to conduct a series of free films in various off-campus facilities. Documentaries and recent TV specials are shown, followed by a group discussion moderated by an instructor from the…

  1. Experiments in ESP.

    ERIC Educational Resources Information Center

    Guerin, Stephen M.; Guerin, Clark L.

    1979-01-01

    Discusses a phenomenon called Extrasensory Perception (ESP) whereby information is gained directly by the mind without the use of the ordinary senses. Experiments in ESP and the basic equipment and methods are presented. Statistical evaluation of ESP experimental results are also included. (HM)

  2. Moments: The Foxfire Experience.

    ERIC Educational Resources Information Center

    Wigginton, Eliot

    The high school journalism teacher who initiated the Foxfire Project discusses the memorable learning experiences and community studies in which students are involved as they develop and publish the Foxfire magazines. The author describes the project objectives and the successfully implemented teaching techniques and learning activities so that…

  3. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1979

    1979-01-01

    Describes the following: use and construction of a lens-pinhole spatial filter assembly to produce expanded beams; how to modify a unilab V. L. F. oscillator to give variable frequencies between .1 Hz and 10 Hz; to use Crookes radiometer quantitatively; and an externally located, movable probe for plasma physics experiments, using conventional…

  4. Alpha Antihydrogen Experiment

    NASA Astrophysics Data System (ADS)

    Fujiwara, M. C.; Andresen, G. B.; Ashkezari, M. D.; Baquero-Ruiz, M.; Bertsche, W.; Bray, C. C.; Butler, E.; Cesar, C. L.; Chapman, S.; Charlton, M.; Cesar, C. L.; Fajans, J.; Friesen, T.; Gill, D. R.; Hangst, J. S.; Hardy, W. N.; Hayano, R. S.; Hayden, M. E.; Humphries, A. J.; Hydomako, R.; Jonsell, S.; Kurchaninov, L.; Lambo, R.; Madsen, N.; Menary, S.; Nolan, P.; Olchanski, K.; Olin, A.; Povilus, A.; Pusa, P.; Robicheaux, F.; Sarid, E.; Silveira, D. M.; So, C.; Storey, J. W.; Thompson, R. I.; van der Werf, D. P.; Wilding, D.; Wurtele, J. S.; Yamazaki, Y.

    2011-12-01

    ALPHA is an experiment at CERN, whose ultimate goal is to perform a precise test of CPT symmetry with trapped antihydrogen atoms. After reviewing the motivations, we discuss our recent progress toward the initial goal of stable trapping of antihydrogen, with some emphasis on particle detection techniques.

  5. The Alpha Antihydrogen Experiment

    NASA Astrophysics Data System (ADS)

    Madsen, N.; Andresen, G.; Bertsche, W.; Boston, A.; Bowe, P. D.; Butler, E.; Cesar, C. L.; Chapman, S.; Charlton, M.; Chartier, M.; Fajans, J.; Funakoshi, R.; Gill, D. R.; Hangst, J. S.; Hardy, W. N.; Hayano, R. S.; Hayden, M.; Hydomako, R.; Jenkins, M. J.; Jørgensen, L. V.; Kurchaninov, L.; Nolan, P.; Olchanski, K.; Olin, A.; Page, R. D.; Povilus, A.; Robicheaux, F.; Sarid, E.; Seif El Nasr, S.; Silveira, D. M.; Storey, J. W.; Thompson, R. I.; van der Werf, D. P.; Wurtele, J. S.; Yamazaki, Y.

    2008-03-01

    ALPHA is a new experiment at the CERN Antiproton Decelerator (AD). The short term goal of ALPHA is trapping of cold antihydrogen, with the long term goal of conducting precise spectroscopic comparisons of hydrogen and antihydrogen. Here we present the current status of ALPHA and the physics considerations and results leading to its design as well as recent progress towards trapping.

  6. Principal Experiences of Succession

    ERIC Educational Resources Information Center

    Steele, Farla Gay

    2015-01-01

    This multiple case study explored the experiences of school principals and the usefulness of Peters' (2011) succession planning model. Ten purposefully selected principals from varying grade levels were interviewed; none reported a formal succession plan, and all had been assistant principals. The study concluded the assistant principal position…

  7. JPL solar power experiments

    NASA Technical Reports Server (NTRS)

    Yasui, R. K.

    1976-01-01

    Report describes evolution of photovoltaic power systems designed and built for terrestrial use. Discussion focuses on technological problems impeding further systems development. Experiments and test data on seven types of solar panels and six material test specimens are described in detail.

  8. Experimenting with Liquid Membranes.

    ERIC Educational Resources Information Center

    Lamb, J. D.; And Others

    1980-01-01

    Outlined are two experiments using liquid membranes that illustrate carrier-facilitated transport, where chemical species are ushered across the membrane by selective "carrier" molecules residing in the membrane. The use of liquid membranes as models for studying and describing biological transport mechanisms is explored. (CS)

  9. BTKh-35 MEMBRANA experiment

    NASA Image and Video Library

    2011-11-17

    ISS029-E-042539 (17 Nov. 2011) --- Russian cosmonaut Anton Shkaplerov is pictured onboard the International Space Station working with the biological BTKh-35 MEMBRANE experiment. Shkaplerov is one of three Expedition 29 crew members who recently joined three original Expedition 29 crew members aboard the orbiting complex. In a few days he will become a flight engineer on the Expedition 30 crew.

  10. Experiments in Free Fall

    ERIC Educational Resources Information Center

    Art, Albert

    2006-01-01

    A model lift containing a figure of Albert Einstein is released from the side of a tall building and its free fall is arrested by elastic ropes. This arrangement allows four simple experiments to be conducted in the lift to demonstrate the effects of free fall and show how they can lead to the concept of the equivalence of inertial and…

  11. FLORIDA TOWER FOOTPRINT EXPERIMENTS

    SciTech Connect

    WATSON,T.B.; DIETZ, R.N.; WILKE, R.; HENDREY, G.; LEWIN, K.; NAGY, J.; LECLERC, M.

    2007-01-01

    The Florida Footprint experiments were a series of field programs in which perfluorocarbon tracers were released in different configurations centered on a flux tower to generate a data set that can be used to test transport and dispersion models. These models are used to determine the sources of the CO{sub 2} that cause the fluxes measured at eddy covariance towers. Experiments were conducted in a managed slash pine forest, 10 km northeast of Gainesville, Florida, in 2002, 2004, and 2006 and in atmospheric conditions that ranged from well mixed, to very stable, including the transition period between convective conditions at midday to stable conditions after sun set. There were a total of 15 experiments. The characteristics of the PFTs, details of sampling and analysis methods, quality control measures, and analytical statistics including confidence limits are presented. Details of the field programs including tracer release rates, tracer source configurations, and configuration of the samplers are discussed. The result of this experiment is a high quality, well documented tracer and meteorological data set that can be used to improve and validate canopy dispersion models.

  12. Experimenting with Guitar Strings

    ERIC Educational Resources Information Center

    LoPresto, Michael C.

    2006-01-01

    What follows is a description of a simple experiment developed in a non-mathematical general education science course on sound and light for fine arts students in which a guitar is used with data collection hardware and software to verify the properties of standing waves on a string.

  13. Experiments on ferrimagnetism

    NASA Astrophysics Data System (ADS)

    Kraftmakher, Yaakov

    2013-03-01

    Ferrimagnetism undoubtedly deserves a proper place in the undergraduate laboratory on electricity and magnetism. Four student experiments on ferrimagnetism are considered: (i) the hysteresis loops and permeability of a ‘soft’ ferrite; (ii) the differential permeability versus a dc bias; (iii) the frequency dependence of the complex permeability and (iv) the electromagnetic interference suppression by ferrite chokes and beads. Two ferrite cores taken off a low-frequency choke and a power cord are used. The measurements are simple and straightforward and show the important properties of ferrites and their applications. The values of the permeability of the ferrite core determined in experiments (i)-(iii) are in reasonable agreement. The frequency dependence of the complex permeability of the ferrites is similar to that given by the manufacturers. The capability of absorbing electromagnetic waves in a definite frequency range shown in experiment (iv) demonstrates one of the principles of Stealth technology. The equipment necessary for the experiments can be found in many student laboratories.

  14. The Airplane Experiment.

    ERIC Educational Resources Information Center

    Larson, Lee; Grant, Roderick

    1991-01-01

    Presents an experiment to investigate centripetal force and acceleration that utilizes an airplane suspended on a string from a spring balance. Investigates the possibility that lift on the wings of the airplane accounts for the differences between calculated tension and measured tension on the string. (MDH)

  15. Experimenting with Guitar Strings

    ERIC Educational Resources Information Center

    LoPresto, Michael C.

    2006-01-01

    What follows is a description of a simple experiment developed in a non-mathematical general education science course on sound and light for fine arts students in which a guitar is used with data collection hardware and software to verify the properties of standing waves on a string.

  16. Experiments with Ultrasonic Transducers.

    ERIC Educational Resources Information Center

    Greenslade, Thomas R., Jr.

    1994-01-01

    Discusses the use of 40 kHz ultrasonic transducers to study wave phenomena. Determines that the resulting wavelength of 9 mm allows acoustic experiments to be performed on a tabletop. Includes transducer characteristics and activities on speed of sound, reflection, double- and single-slit diffraction, standing waves, acoustical zone plate, and…

  17. Experiments in Pulsed Ultrasonics

    ERIC Educational Resources Information Center

    Palmer, S. B.; Forster, G. A.

    1970-01-01

    Describes and apparatus designed to generate and detect pulsed ultrasonics in solids and liquids over the frequency range 1-20 MHz. Experiments are suggested for velocity of sound, elastic constant and ultrasonic attenuation measurements on various materials over a wide temperature range. The equipment should be useful for demonstration purposes.…

  18. The Doppler Pendulum Experiment

    ERIC Educational Resources Information Center

    Lee, C. K.; Wong, H. K.

    2011-01-01

    An experiment to verify the Doppler effect of sound waves is described. An ultrasonic source is mounted at the end of a simple pendulum. As the pendulum swings, the rapid change of frequency can be recorded by a stationary receiver using a simple frequency-to-voltage converter. The experimental results are in close agreement with the Doppler…

  19. Experiments with Aspirin.

    ERIC Educational Resources Information Center

    Borer, Londa L.; Barry, Edward

    2000-01-01

    Presents a series of experiments that can be used to demonstrate how aspirin can be synthesized and characterized, how the hydrolysis of aspirin can be used as an introduction to kinetics, and how coordination chemistry (chelation) can be introduced by preparing and characterizing the copper complexes of aspirin and salicylic acid. (Contains over…

  20. Experiments in Free Fall

    ERIC Educational Resources Information Center

    Art, Albert

    2006-01-01

    A model lift containing a figure of Albert Einstein is released from the side of a tall building and its free fall is arrested by elastic ropes. This arrangement allows four simple experiments to be conducted in the lift to demonstrate the effects of free fall and show how they can lead to the concept of the equivalence of inertial and…

  1. NASSC: A Businessman's Experience.

    ERIC Educational Resources Information Center

    Rundell, C. Reid

    1992-01-01

    From a businessman's viewpoint, the New American Schools Development Corporation (NASDC) offers a singular opportunity to help this nation create a Saturn-like experience for education, school by school. As Saturn revolutionized the way cars are built, NASDC can revolutionize the way children are taught. The 11 winning projects have real potential…

  2. Kelp growth experiments

    SciTech Connect

    North, W. J.

    1980-01-01

    Harvest yields obtainable from giant kelp plants that are adequately fertilized were investigated. The following topics are discussed: desirable characteristics in a candidate macroalga, and giant kelp as a candidate macroalga for ocean farming. Nutrient requirements, field experiments, and approaches to acquiring yield data are reviewed. (MHR)

  3. Experiences of Collaborative Research

    ERIC Educational Resources Information Center

    Kahneman, Daniel

    2003-01-01

    The author's personal history of the research that led to his recognition in economics is described, focusing on the process of collaboration and on the experience of controversy. The author's collaboration with Amos Tversky dealt with 3 major topics: judgment under uncertainty, decision making, and framing effects. A subsequent collaboration,…

  4. Experiments with Patterns

    ERIC Educational Resources Information Center

    de Mestre, Neville

    2008-01-01

    This article presents a hands-on experiment that covers many areas of high school mathematics. Included are the notions of patterns, proof, triangular numbers and various aspects of problem solving. The problem involves the arrangements of a school of fish using split peas or buttons to represent the fish. (Contains 4 figures.)

  5. DSWA calorimeter bomb experiments

    SciTech Connect

    Cunningham, B

    1998-10-01

    Two experiments were performed in which 25 grams of TNT were detonated inside an expended detonation calorimeter bomb. The bomb had a contained volume of approximately 5.28 liters. In the first experiment, the bomb was charged with 3 atmospheres of nitrogen. In the second, it was charged with 2.58 atmospheres (23.1 psi gage) of oxygen. In each experiment pressure was monitored over a period of approximately 1200 microseconds after the pulse to the CDU. Monitoring was performed via two 10,000 psi 102AO3 PCB high frequency pressure transducers mounted symmetrically in the lid of the calorimeter bomb. Conditioners used were PCB 482As. The signals from the transducers were recorded in digital format on a multi channel Tektronix scope. The sampling frequency was 10 Mhz (10 samples per microsecond). After a period of cooling following detonation, gas samples were taken and were subsequently submitted for analysis using gas mass spectrometry. Due to a late request for post shot measurement, it was only possible to make a rough estimate of the weight of debris (carbon) remaining in the calorimeter bomb following the second experiment.

  6. The Black Experience.

    ERIC Educational Resources Information Center

    Allen, Lee E., Ed.

    1974-01-01

    This issue of "The Leaflet" focuses on the black experience. Included are four poems by Lawrence Johnson, "Little Girl Black,""Be's That Way Sometime,""My Blackness," and "Three Songs of Freedom"; two papers originally presented at the 1973 New England Association of Teachers of English Conference, "Teaching English to the Disadvantaged in Large…

  7. Galileo Optical Experiment GOPEX

    NASA Image and Video Library

    1996-02-08

    Two sets of laser pulses transmitted from Earth to a spacecraft over a distance of 1.4 million kilometers 870,000 miles in a communications experiment are shown in this long-exposure image made by NASA’s Galileo spacecraft imaging system. http://photojournal.jpl.nasa.gov/catalog/PIA00230

  8. Revisiting Supervised Agricultural Experience.

    ERIC Educational Resources Information Center

    Camp, William G.; Clarke, Ariane; Fallon, Maureen

    2000-01-01

    A Delphi panel of 40 agricultural educators unanimously agreed that supervised agricultural experience should remain an integral component of the curriculum; a name change is not currently warranted. Categories recommended were agribusiness entrepreneurship, placement, production, research, directed school lab, communications, exploration, and…

  9. Experiences of Collaborative Research

    ERIC Educational Resources Information Center

    Kahneman, Daniel

    2003-01-01

    The author's personal history of the research that led to his recognition in economics is described, focusing on the process of collaboration and on the experience of controversy. The author's collaboration with Amos Tversky dealt with 3 major topics: judgment under uncertainty, decision making, and framing effects. A subsequent collaboration,…

  10. Experiment at Evergreen.

    ERIC Educational Resources Information Center

    Jones, Richard M.

    The philosophy and structure of programs of coordinated study at Evergreen State College from 1970 to 1980 are discussed, and comparisons are made to the experiment at the University of California, Berkeley, promoted by Joseph Tussman. Both programs are based on ideas suggested by Alexander Meiklejohn and his Experimental College at the University…

  11. Examining Latina College Experiences

    ERIC Educational Resources Information Center

    Romero, Amanda R.

    2012-01-01

    The purposes of this qualitative narrative study were to explore the potential areas of conflict Latina college students experience between their educational goals and traditional cultural gender roles and expectations. Participants were selected utilizing purposeful sampling methods. All participants were first-generation college students.…

  12. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1989

    1989-01-01

    Described are the purposes, laboratory set-ups, and procedures of four classroom experiments: ultrasound speedometer; vibrating-bar depth gauge; folding three-dimensional model of equipotential surfaces; and a simple optical system for the reconstruction of images from computer-generated holograms. Diagrams and pictures are provided. (YP)

  13. Experiments in Ice Physics.

    ERIC Educational Resources Information Center

    Martin, P. F.; And Others

    1978-01-01

    Describes experiments in ice physics that demonstrate the behavior and properties of ice. Show that ice behaves as an ionic conductor in which charge is transferred by the movement of protons, its electrical conductivity is highly temperature-dependent, and its dielectric properties show dramatic variation in the kilohertz range. (Author/GA)

  14. Experiments on Photoconductivity

    ERIC Educational Resources Information Center

    Kraftmakher, Yaakov

    2012-01-01

    Computer-assisted experiments with CdS and CdSe photoresistors are described. The most important characteristics of the photoresistors are determined: (i) the spectral response, (ii) the photocurrent versus incident radiant power, (iii) the rise and decay time constants and (iv) the frequency response to modulated light. The photoconductivity gain…

  15. Music: A Shared Experience.

    ERIC Educational Resources Information Center

    Dunn, Rosemary

    1992-01-01

    This paper describes how sixth form girls in England provided music experiences to young children (ages 3-9) with severe learning difficulties. The weekly sessions involve individual sessions and use of various instruments. The relationship of the music therapy program to the National Curriculum is noted. (DB)

  16. Virtual Inquiry Experiences

    ERIC Educational Resources Information Center

    Harlow, Danielle; Nilsen, Katy

    2011-01-01

    Children in classrooms and scientists in laboratories engage in similar activities: they observe, ask questions, and try to explain phenomena. Video conferencing technology can remove the wall between the classroom and the laboratory, bringing children and scientists together. Virtual experiences and field trips can provide many of the benefits of…

  17. Experimenting with Woodwind Instruments

    ERIC Educational Resources Information Center

    LoPresto, Michael C.

    2007-01-01

    Simple experiments involving musical instruments of the woodwind family can be used to demonstrate the basic physics of vibrating air columns in resonance tubes using nothing more than straightforward measurements and data collection hardware and software. More involved experimentation with the same equipment can provide insight into the effects…

  18. The ALARM Experiment

    ERIC Educational Resources Information Center

    Gerhardt, Ira

    2015-01-01

    An experiment was conducted over three recent semesters of an introductory calculus course to test whether it was possible to quantify the effect that difficulty with basic algebraic and arithmetic computation had on individual performance. Points lost during the term were classified as being due to either algebraic and arithmetic mistakes…

  19. Virtual Inquiry Experiences

    ERIC Educational Resources Information Center

    Harlow, Danielle; Nilsen, Katy

    2011-01-01

    Children in classrooms and scientists in laboratories engage in similar activities: they observe, ask questions, and try to explain phenomena. Video conferencing technology can remove the wall between the classroom and the laboratory, bringing children and scientists together. Virtual experiences and field trips can provide many of the benefits of…

  20. Child Psychology Experiences Program.

    ERIC Educational Resources Information Center

    Walla Walla Coll., WA.

    Recognizing the need for trained teachers to enter the classroom with confidence and professional capacity, Walla Walla College introduced a Child Psychology Experience program. Personnel from several departments contribute to this program. In connection with the child psychology courses, the project features a laboratory/demonstration center…

  1. SAMBA Project Experiences

    NASA Astrophysics Data System (ADS)

    Fuhrhop, Christian; Vaidya, Raju; Mayora, Oscar; Furtado, Elizabeth

    The purpose of the SAMBA project, running from January 2007 to February 2009, was to create a framework for allowing local communities and citizens (including low income population) to access community-oriented content and services by means of iDTV channels, specifically MHP over DVB-T. This paper summarises the project and the experiences gained from it.

  2. The Group Experience

    ERIC Educational Resources Information Center

    Wadsworth, John

    2008-01-01

    Knowledge of group dynamics and leadership activities is a component of the CORE Standards for the Master's degree curriculum in Rehabilitation Counseling. A group experience is often included as a learning activity in rehabilitation counselor education curricula as an instructional method of imparting knowledge of group dynamics. Group experience…

  3. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1983

    1983-01-01

    An experiment on cooling by convection, holographic processes achieved using optical fibers and observation of magnetic domains are described. Also describes four demonstrations: mechanical resonance on air track, independence of horizontal/vertical motion, motion of sphere in fluid medium, and light scattering near the critical point. (JN)

  4. Elastic swimming II: Experiments

    NASA Astrophysics Data System (ADS)

    Yu, Tony; Lauga, Eric; Hosoi, Anette

    2006-03-01

    We consider the problem of swimming at low Reynolds number by oscillating an elastic filament in a viscous liquid, as investigated by Wiggins and Goldstein (1998, Phys Rev Lett). In this second part of the study, we present results of a series of experiments characterizing the performance of the propulsive mechanism.

  5. Permeable membrane experiment

    NASA Technical Reports Server (NTRS)

    Slavin, Thomas J.; Cao, Tuan Q.; Kliss, Mark H.

    1993-01-01

    The purpose of the Permeable Membrane Experiment is to gather flight data on three areas of membrane performance that are influenced by the presence of gravity. These areas are: (1) Liquid/gas phase separation, (2) gas bubble interference with diffusion through porous membranes and (3) wetting characteristics of hydrophilic membrane surfaces. These data are important in understaning the behavior of membrane/liquid/gas interfaces where surface tension forces predominate. The data will be compared with 1-g data already obtained and with predicted micrograviity behavior. The data will be used to develop designs for phase separation and plant nutrient delivery systems and will be available to the life support community for use in developing technologies which employ membranes. A conceptual design has been developed to conduct three membrane experiments, in sequence, aboard a single Complex Autonomous Payload (CAP) carrier to be carried in the Shuttle Orbiter payload bay. One experiment is conducted for each of the three membrane performance areas under study. These experiments are discussed in this paper.

  6. An NMR Kinetics Experiment.

    ERIC Educational Resources Information Center

    Kaufman, Don; And Others

    1982-01-01

    Outlines advantages of and provides background information, procedures, and typical student data for an experiment determining rate of hydration of p-methyoxyphenylacetylene (III), followed by nuclear magnetic resonance spectroscopy. Reaction rate can be adjusted to meet time framework of a particular laboratory by altering concentration of…

  7. Experiments with Dipole Antennas

    ERIC Educational Resources Information Center

    Kraftmakher, Yaakov

    2009-01-01

    Employment of a data-acquisition system for data collection and calculations makes experiments with antennas more convenient and less time consuming. The determined directional patterns of the dipole antennas of different lengths are in reasonable agreement with theory. The enhancement of the signal by using a reflector is demonstrated, and a…

  8. Experiments with Retraining.

    ERIC Educational Resources Information Center

    Shultz, George P.; Weber, Arnold R.

    When Armour and Company faced a shutdown of six plants, it joined in a cooperative program of vocational retraining with two labor unions; an Automation Fund Committee was formed, with representation from management, the unions, and "public" (college professors); and an experimental program in Oklahoma City provided experience which was…

  9. Experiments with Dipole Antennas

    ERIC Educational Resources Information Center

    Kraftmakher, Yaakov

    2009-01-01

    Employment of a data-acquisition system for data collection and calculations makes experiments with antennas more convenient and less time consuming. The determined directional patterns of the dipole antennas of different lengths are in reasonable agreement with theory. The enhancement of the signal by using a reflector is demonstrated, and a…

  10. Cyclic Voltammetry Experiment.

    ERIC Educational Resources Information Center

    Van Benschoten, James J.; And Others

    1983-01-01

    Describes a three-part experiment designed to introduce cyclic voltammetry to graduate/undergraduate students. Part 1 demonstrates formal reduction potential, redox electron transfer, diffusion coefficient, and electrochemical reversibility. Part 2 investigates electrochemical behavior of acetaminophen. Part 3 examines such experimental variables…

  11. Personal Experiences of China

    ERIC Educational Resources Information Center

    Hessler, Peter; Bradeen, Ryan; Wang, Richard; Masalski, Kathleen Woods

    2010-01-01

    This article presents four stories of personal experiences of China. In "A Journey Between China's Past and Present," Peter Hessler, a former Peace Corps volunteer and author, highlights misconceptions between Chinese and Americans and the desire both peoples share for knowledge about one another. In "Life on Liberation…

  12. Experiences and Outcomes

    ERIC Educational Resources Information Center

    Marden, Nicole Y.; Ulman, Leslie G.; Wilson, Fiona S.; Velan, Gary M.

    2013-01-01

    Online formative assessments have become increasingly popular; however, formal evidence supporting their educational benefits is limited. This study investigated the impact of online feedback quizzes on the learning experiences and outcomes of undergraduate students enrolled in an introductory physiology course. Four quiz models were tested, which…

  13. Rocket Auroral Correlator Experiment

    NASA Technical Reports Server (NTRS)

    LaBelle, James

    2003-01-01

    Dartmouth College provided a multi-channel high- and low- frequency wave receivers, including active sensors on deployable booms, to the Rocket Auroral Correlator Experiment launched from Poker Flat, Alaska, in January 2002. College also performed preliminary analysis of the data. Details are outlined in chronological order.

  14. The Majorana Experiment

    SciTech Connect

    Aalseth, Craig E.; Aguayo Navarrete, Estanislao; Amman, M.; Avignone, F. T.; Back, Henning O.; Bai, Xinhua; Barabash, Alexander S.; Barbeau, P. S.; Bergevin, M.; Bertrand, F.; Boswell, M.; Brudanin, V.; Bugg, William; Burritt, Tom H.; Busch, Matthew; Capps, Greg L.; Chan, Yuen-Dat; Collar, J. I.; Cooper, R. J.; Creswick, R.; Detwiler, Jason A.; Diaz, J.; Doe, Peter J.; Efremenko, Yuri; Egorov, Viatcheslav; Ejiri, H.; Elliott, S. R.; Ely, James H.; Esterline, James H.; Farach, H. A.; Fast, James E.; Fields, N.; Finnerty, P.; Fraenkle, Florian; Gehman, Victor M.; Giovanetti, G. K.; Green, M.; Guiseppe, Vincente; Gusey, K.; Hallin, A. L.; Harper, Gregory; Hazama, R.; Henning, Reyco; Hime, Andrew; Hong, H.; Hoppe, Eric W.; Hossbach, Todd W.; Howard, Stanley; Howe, M. A.; Johnson, R. A.; Keeter, K.; Keillor, Martin E.; Keller, C.; Kephart, Jeremy D.; Kidd, M. F.; Knecht, A.; Kochetov, Oleg; Konovalov, S.; Kouzes, Richard T.; LaRoque, B. H.; Leviner, L.; Loach, J. C.; Luke, P.; MacMullin, S.; Marino, Michael G.; Martin, R. D.; Medlin, D.; Mei, Dong-Ming; Miley, Harry S.; Miller, M. L.; Mizouni, Leila; Myers, Allan W.; Nomachi, Masaharu; Orrell, John L.; Peterson, David; Phillips, D.; Poon, Alan; Perevozchikov, O.; Perumpilly, Gopakumar; Prior, Gersende; Radford, D. C.; Reid, Douglas J.; Rielage, Keith; Robertson, R. G. H.; Rodriguez, Larry; Ronquest, M. C.; Salazar, Harold; Schubert, Alexis G.; Shima, T.; Shirchenko, M.; Sobolev, V.; Steele, David; Strain, J.; Swift, Gary; Thomas, K.; Timkin, V.; Tornow, W.; Van Wechel, T. D.; Vanyushin, I.; Varner, R. L.; Vetter, Kai; Vorren, Kris R.; Wilkerson, J. F.; Wolfe, B. A.; Xiang, W.; Yakushev, E.; Yaver, Harold; Young, A.; Yu, Chang-Hong; Yumatov, V.; Zhang, C.

    2011-08-01

    The Majorana Collaboration is assembling an array of HPGe detectors to search for neutrinoless double-beta decay in 76Ge. Initially, Majorana aims to construct a prototype module to demonstrate the potential of a future 1-tonne experiment. The design and potential reach of this prototype Demonstrator module are presented.

  15. Education or Experience?

    ERIC Educational Resources Information Center

    Vandenberg, Donald

    1980-01-01

    An intensive analysis of Dewey's definition of education in his "Democracy and Education" shows that Dewey's use of a theory of educative experience was unjustified and prevented the formulation of a theory of democratic education. Critics and revisionists say that Dewey did not believe in the educability of working class children. (FG)

  16. Celebrating Life's Experiences.

    ERIC Educational Resources Information Center

    Smith, David B.

    1997-01-01

    For six weeks, 25 Connecticut seventh graders interviewed senior citizens from a nearby assisted-independent-living facility. By celebrating their senior partners' life experiences, students formulated a better understanding of major events in 20th century American history. During the fifth and sixth weeks, students shared something from their own…

  17. Invisalign: early experiences.

    PubMed

    Joffe, L

    2003-12-01

    This article describes the Invisalign technique. It is based on the author's personal experience of over 60 cases started in the private practice setting. The technology behind Invisalign and its development is reviewed. The Invisalign clinical technique is described, and the advantages and disadvantages of using Invisalign are highlighted.

  18. Notes on Experiments.

    ERIC Educational Resources Information Center

    Physics Education, 1983

    1983-01-01

    An experiment on cooling by convection, holographic processes achieved using optical fibers and observation of magnetic domains are described. Also describes four demonstrations: mechanical resonance on air track, independence of horizontal/vertical motion, motion of sphere in fluid medium, and light scattering near the critical point. (JN)

  19. Personal Experiences of China

    ERIC Educational Resources Information Center

    Hessler, Peter; Bradeen, Ryan; Wang, Richard; Masalski, Kathleen Woods

    2010-01-01

    This article presents four stories of personal experiences of China. In "A Journey Between China's Past and Present," Peter Hessler, a former Peace Corps volunteer and author, highlights misconceptions between Chinese and Americans and the desire both peoples share for knowledge about one another. In "Life on Liberation…

  20. A cosmic rays experiment

    NASA Astrophysics Data System (ADS)

    Pérez Munguía, Gustavo; Pineda de Carías, María Cristina

    1995-01-01

    In this paper we present the results of an experiment performed to detect the total flux of muons incident over Tegucigalpa (Honduras) the day of the total solar eclipse of the 11 July, 1991; and also a comparison with data obtained before the eclipse and registered in the past years.