Science.gov

Sample records for nuclei preliminary results

  1. Understanding Active Galactic Nuclei using near-infrared high angular resolution polarimetry II: Preliminary results

    NASA Astrophysics Data System (ADS)

    Marin, F.; Grosset, L.; Goosmann, R.; Gratadour, D.; Rouan, D.; Clénet, Y.; Pelat, D.; Rojas Lobos, P. A.

    2016-12-01

    In this second research note of a series of two, we present the first near-infrared results we obtained when modeling Active Galactic Nuclei (AGN). Our first proceedings showed the comparison between the MontAGN and STOKES Monte Carlo codes. Now we use our radiative transfer codes to simulate the polarization maps of a prototypical, NGC 1068-like, type-2 radio-quiet AGN. We produced high angular resolution infrared (1 μm) polarization images to be compared with recent observations in this wavelength range. Our preliminary results already show a good agreement between the models and observations but cannot account for the peculiar linear polarization angle of the torus such as observed. tet{Gratadour2015} found a polarization position angle being perpendicular to the bipolar outflows axis. Further work is needed to improve the models by adding physical phenomena such as dichroism and clumpiness.

  2. Ice Nuclei in Mid-Latitude Cirrus: Preliminary Results from a New Counterflow Virtual Impactor (CVI) Aircraft Inlet

    NASA Astrophysics Data System (ADS)

    Froyd, K. D.; Cziczo, D. J.; Murphy, D. M.; Kulkarni, G.; Lawson, P.

    2011-12-01

    Cirrus cloud properties are strongly governed by the mechanism of ice particle formation and by the number and effectiveness of ambient ice nuclei. Airborne measurements of ice nuclei reveal new nucleation mechanisms, provide constraints on microphysical models, and guide laboratory investigations. For over two decades the Counterflow Virtual Impactor (CVI) inlet has remained the prevailing approach for sampling cloud particles to measure ice nuclei from an aircraft platform. However, traditional CVI inlets have fundamental limitations when operating on high speed aircraft, where only a small fraction of ambient cloud particles are typically sampled. A novel 'folded' CVI was constructed and deployed during the NASA MACPEX 2011 campaign. The flow design of this inlet effectively doubles the CVI length and thereby increases the size range of captured cirrus particles. Additional design elements such as an internal vortex flow, a neon carrier gas, and an infrared laser further improve the capture and evaporation of ice crystals. Preliminary results of ice nuclei composition measured by the PALMS single-particle mass spectrometer are presented from the MACPEX campaign. Examples of ice nuclei from mid-latitude cirrus are shown, including mineral dust, organic-rich aerosol with amine and diacid components, and lead-containing aerosol.

  3. Preliminary results of DISTO

    NASA Astrophysics Data System (ADS)

    Bedfer, Y.

    1998-05-01

    DISTO is a spectrometer experiment installed at Saturne in Saclay to study strangeness production in p¯p reactions. It has entered its production phase in the second semester of 1996 and is to complete it by the time Saturne closes at the end of 1997. Preliminary results bearing on the two main items of its physics program. viz. polarization in associated hyperon production and OZ1 rule assessment in vector meson production, and obtained at 2.85 GeV are presented.

  4. The MUNU experiment : preliminary results

    NASA Astrophysics Data System (ADS)

    Busto, J.; MUNU Collaboration

    2000-06-01

    The MUNU collaboration has built a detector to study overlineνe - e - scattering at low energy. From the results we expect to increase the sensitivity to the neutrino magnetic moment. The detector used, a 1 m 3 T.P.C. surrounded by an anti-Compton scintillator, is running at the Bugey nuclear plant. Some preliminary results will be presented in the following.

  5. Preliminary studies of electromagnetic sounding of cometary nuclei

    NASA Technical Reports Server (NTRS)

    Gabriel, A.; Warne, L.; Bednarczyk, S.; Elachi, C.

    1978-01-01

    The internal structure of a comet could be determined with a spacecraft borne electromagnetic sounder. A dielectric profile of the comet could be produced in direct analogy with terrestrial glacier and ice sheet sounding experiments. This profile would allow the detection of a rocky core or ice layers if they exist, just as layers in the ice and the bedrock interface have been clearly observed through the Greenland ice sheet. It would also provide a gross estimate of the amount of dust in the icy region. Models for the response of the nucleus and cometary plasma to electromagnetic sounding are developed and used to derive experimental parameters. A point system design was completed. Preliminary engineering study results indicate that the sounder is well within the bounds of current space technology.

  6. Surveyor 3 Preliminary Science Results

    NASA Technical Reports Server (NTRS)

    1967-01-01

    Surveyor III soft-landed on the Moon at 00:04 GMT on April 20, 1967. Data obtained have significantly increased our knowledge of the Moon. The Surveyor III spacecraft was similar to Surveyor I; the only major change in scientific instrumentation was the addition of a soil mechanics surface sampler. Surveyor III results at this preliminary evaluation of data give valuable information about the relation between the surface skin of under-dense material responsible for the photometric properties and the deeper layers of material whose properties resemble those of ordinary terrestrial soils. In addition, they provide new insight into the relation between the general lunar surface as seen by Surveyor I and the interior of a large subdued crater. The new results have also contributed to our understanding of the mechanism of downhill transport. Many critical questions cannot, however, be answered until final reduction of experimental data.

  7. Monsoon '90 - Preliminary SAR results

    NASA Technical Reports Server (NTRS)

    Dubois, Pascale C.; Van Zyl, Jakob J.; Guerra, Abel G.

    1992-01-01

    Multifrequency polarimetric synthetic aperture radar (SAR) images of the Walnut Gulch watershed near Tombstone, Arizona were acquired on 28 Mar. 1990 and on 1 Aug. 1990. Trihedral corner reflectors were deployed prior to both overflights to allow calibration of the two SAR data sets. During both overflights, gravimetric soil moisture and dielectric constant measurements were made. Detailed vegetation height, density, and water content measurements were made as part of the Monsoon 1990 Experiment. Preliminary results based on analysis of the multitemporal polarimetric SAR data are presented. Only the C-band data (5.7-cm wavelength) radar images show significant difference between Mar. and Aug., with the strongest difference observed in the HV images. Based on the radar data analysis and the in situ measurements, we conclude that these differences are mainly due to changes in the vegetation and not due to the soil moisture changes.

  8. Monsoon 1990: Preliminary SAR results

    NASA Technical Reports Server (NTRS)

    Vanzyl, Jakob J.; Dubois, Pascale; Guerra, Abel

    1991-01-01

    Multifrequency polarimetric synthetic aperture radar (SAR) images of the Walnut Gulch watershed near Tombstone, Arizona were acquired on 28 Mar. 1990 and on 1 Aug. 1990. Trihedral corner reflectors were deployed prior to both overflights to allow calibration of the two SAR data sets. During both overflights, gravimetric soil moisture and dielectric constant measurements were made. Detailed vegetation height, density, and water content measurements were made as part of the Monsoon 1990 Experiment. Preliminary results based on analysis of the multitemporal polarimetric SAR data are presented. Only the C-band data (5.7-cm wavelength) radar images show significant difference between Mar. and Aug., with the strongest difference observed in the HV images. Based on the radar data analysis and the in situ measurements, we conclude that these differences are mainly due to changes in the vegetation and not due to the soil moisture changes.

  9. Preliminary results of UCN τ

    NASA Astrophysics Data System (ADS)

    Pattie, Robert; UCNtau Collaboration

    2017-01-01

    There is currently a 4 σ discrepancy between measurements of the neutron lifetime performed using cold neutron beams and those performed with ultracold neutron (UCN) storage vessels. The UCN τ experiment uses an asymmetric magneto-gravitational UCN trap with in situ counting of surviving neutrons to measure the neutron lifetime. This design eliminates a major systematic of previous bottle experiments related to the loss of UCN on material trap walls and with unloading neutrons from the storage vessel. A new in situ detection system was used in the 2015-2016 run that was able to measure the population of surviving UCN at different heights in the trap, providing important information on spectral evolution. Understanding the behavior of quasi-bound UCN in a bottle experiment is essential to achieving a subsecond precision measurement of τn. We will present the preliminary results from the 2015-2016 data set and an update on the UCN τ experiment.

  10. EUPORIAS: plans and preliminary results

    NASA Astrophysics Data System (ADS)

    Buontempo, C.

    2013-12-01

    Recent advances in our understanding and ability to forecast climate variability have meant that skilful predictions are beginning to be routinely made on seasonal to decadal (s2d) timescales. Such forecasts have the potential to be of great value to a wide range of decision-making, where outcomes are strongly influenced by variations in the climate. In 2012 the European Commission funded EUPORIAS, a four year long project to develop prototype end-to-end climate impact prediction services operating on a seasonal to decadal timescale, and assess their value in informing decision-making. EUPORIAS commenced on 1 November 2012, coordinated by the UK Met Office leading a consortium of 24 organisations representing world-class European climate research and climate service centres, expertise in impacts assessments and seasonal predictions, two United Nations agencies, specialists in new media, and commercial companies in climate-vulnerable sectors such as energy, water and tourism. The poster describes the setup of the project, its main outcome and some of the very preliminary results.

  11. Preliminary results of ANAIS-25

    NASA Astrophysics Data System (ADS)

    Amaré, J.; Cebrián, S.; Cuesta, C.; García, E.; Ginestra, C.; Martínez, M.; Oliván, M. A.; Ortigoza, Y.; Ortiz de Solórzano, A.; Pobes, C.; Puimedón, J.; Sarsa, M. L.; Villar, J. A.; Villar, P.

    2014-04-01

    The ANAIS (Annual Modulation with NaI(Tl) Scintillators) experiment aims at the confirmation of the DAMA/LIBRA signal using the same target and technique at the Canfranc Underground Laboratory. 250 kg of ultrapure NaI(Tl) crystals will be used as a target, divided into 20 modules, each coupled to two photomultipliers. Two NaI(Tl) crystals of 12.5 kg each, grown by Alpha Spectra from a powder having a potassium level under the limit of our analytical techniques, form the ANAIS-25 set-up. The background contributions are being carefully studied and preliminary results are presented: their natural potassium content in the bulk has been quantified, as well as the uranium and thorium radioactive chains presence in the bulk through the discrimination of the corresponding alpha events by PSA, and due to the fast commissioning, the contribution from cosmogenic activated isotopes is clearly identified and their decay observed along the first months of data taking. Following the procedures established with ANAIS-0 and previous prototypes, bulk NaI(Tl) scintillation events selection and light collection efficiency have been also studied in ANAIS-25.

  12. Comparative Soot Diagnostics: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Urban, David L.; Griffin, DeVon W.; Gard, Melissa Y.

    1997-01-01

    detected and suppressed. Prior to CSD, no combustion-generated particulate samples had been collected near the flame zone for well-developed microgravity flames. All of the extant data either came from drop tower tests and therefore only corresponded to the early stages of a fire or were collected far from the flame zone. The fuel sources in the drop tower tests were restricted to laminar gas-jet diffusion flames and very rapidly overheated wire insulation. The gas-jet tests indicated, through thermophoretic sampling, (2) that soot primaries and aggregates (groups of primary particles) in low-gravity may be significantly larger than those in normal gravity (1-g). This raises new scientific questions about soot processes as well as practical issues for particulate size sensitivity and detection alarm threshold levels used in on-orbit smoke detectors. Preliminary tests in the 2.2 second drop tower suggest that particulate generated by overheated wire insulation may be larger in low-g than in 1-g. Transmission Electron Microscope (TEM) grids downstream of the fire region in the Wire Insulation Flammability experiment as well as visual observation of long string-like aggregates, further confirm this suggestion. The combined impact of these limited results and theoretical predictions is that, as opposed to extrapolation from l-g data, direct knowledge of low-g combustion particulate is needed for more confident design of smoke detectors for spacecraft. This paper describes the operation and preliminary results of the CSD, a project conceived and developed at NASA Lewis Research Center. The CSD flight experiment was conducted in the Middeck Glovebox Facility (MGBX) on USMP-3. The project is support by NASA Headquarters Microgravity Science and Applications Division and Code Q. The results presented here are from the microgravity portion of the experiment, including the temporal response of the detectors and average sizes of the primary and aggregate particles captured on the

  13. REMS Wind Sensor Preliminary Results

    NASA Astrophysics Data System (ADS)

    De La Torre Juarez, M.; Gomez-Elvira, J.; Navarro, S.; Marin, M.; Torres, J.; Rafkin, S. C.; Newman, C. E.; Pla-García, J.

    2015-12-01

    The REMS instrument is part of the Mars Science Laboratory payload. It is a sensor suite distributed over several parts of the rover. The wind sensor, which is composed of two booms equipped with a set of hot plate anemometers, is installed on the Rover Sensing Mast (RSM). During landing most of the hot plates of one boom were damaged, most likely by the pebbles lifted by the Sky Crane thruster. The loss of one wind boom necessitated a full review of the data processing strategy. Different algorithms have been tested on the readings of the first Mars year, and these results are now archived in the Planetary Data System (PDS), The presentation will include a description of the data processing methods and of the resulting products, including the typical evolution of wind speed and direction session-by-session, hour-by-hour and other kinds of statistics . A review of the wind readings over the first Mars year will also be presented.

  14. Endoscopic retroauricular thyroidectomy: preliminary results.

    PubMed

    Byeon, Hyung Kwon; Holsinger, F Christopher; Tufano, Ralph P; Park, Jae Hong; Sim, Nam Suk; Kim, Won Shik; Choi, Eun Chang; Koh, Yoon Woo

    2016-01-01

    We sought to seek the potential role of endoscopic thyroidectomy with the retroauricular (RA) approach prior to future comparative study with the robotic RA thyroidectomy. Therefore, this study aims to verify the surgical feasibility of endoscopic RA thyroidectomy. Eighteen patients who underwent endoscopic RA thyroidectomy for clinically suspicious papillary thyroid carcinoma or benign lesions from January to December 2013 were retrospectively reviewed and analyzed. All endoscopic operations via RA or modified facelift approach were successfully performed, without any significant intraoperative complications or conversion to open surgery. Based on patient-reported outcome questionnaires, all patients were satisfied with their postoperative surgical scars. Endoscopic RA thyroidectomy is technically feasible and safe with satisfactory cosmetic results for patients where indicated.

  15. COMETARY NUCLEI. The shape and structure of cometary nuclei as a result of low-velocity accretion.

    PubMed

    Jutzi, M; Asphaug, E

    2015-06-19

    Cometary nuclei imaged from flyby and rendezvous spacecraft show common evidence of layered structures and bilobed shapes. But how and when these features formed is much debated, with distinct implications for solar system formation, dynamics, and geology. We show that these features could be a direct result of accretionary collisions, based on three-dimensional impact simulations using realistic constitutive properties. We identify two regimes of interest: layer-forming splats and mergers resulting in bilobed shapes. For bodies with low tensile strength, our results can explain key morphologies of cometary nuclei, as well as their low bulk densities. This advances the hypothesis that nuclei formed by collisional coagulation-either out of cometesimals accreting in the early solar system or, alternatively, out of comparable-sized debris clumps paired in the aftermath of major collisions. Copyright © 2015, American Association for the Advancement of Science.

  16. Polarized electrons in ELSA (preliminary results)

    NASA Astrophysics Data System (ADS)

    Nakamura, S.; von Drachenfels, W.; Durek, D.; Frommberger, F.; Hoffmann, M.; Husmann, D.; Kiel, B.; Klein, F. J.; Menze, D.; Michel, T.; Nakanishi, T.; Naumann, J.; Reichelt, T.; Steier, C.; Toyama, T.; Voigt, S.; Westermann, M.

    1998-01-01

    Polarized electrons have been accelerated in the electron stretcher accelerator ELSA for the first time. Up to 2.1 GeV the polarization of the electron beam supplied by the 120 keV polarized electron source has been measured with a Mo/ller polarimeter. Preliminary results of polarization measurements at high energies and the performance of the source are presented.

  17. New results for medium and heavy-mass nuclei

    NASA Astrophysics Data System (ADS)

    Schwenk, Achim

    2016-09-01

    In this talk, we will discuss the advances, status and challenges of understanding and predicting medium and heavy-mass nuclei based on chiral effective field theory interactions. Supported in part by ERC Grant No. 307986 STRONGINT, the DFG through Grant SFB 1245, the BMBF under Contract No. 06DA70471, and the Max-Planck Society.

  18. New results on the structure of exotic nuclei

    NASA Astrophysics Data System (ADS)

    Sakurai, Hiroyoshi

    2015-04-01

    `Exotic nuclei' far from the stability line are unique objects of many-body quantum system, where ratios of neutron number to proton number are much larger or much smaller than those of nuclei found in nature. Their exotic properties and phenomena emerge from their large isospin asymmetry, and even affect scenarios of nucleosynthesis in universe. One of the exotic emergences is shell evolution. The magic numbers of stable nuclei are known; 2, 8, 20, 28, 50, 82 and 126. However the numbers 8, 20 and 28 have been found no more magic in a neutron-rich region, and new magic numbers such as 6, 16, 32 and 34 have been discovered. To access nuclei far from the stability line, especially neutron-rich nuclei, a large heavy-ion accelerator facility `Radioactive Isotope Beam Factory (RIBF)' was constructed at RIKEN, Japan in 2007. The facility is highly optimized for inflight production of fission fragments via a U beam. The accelerator complex delivers an intense 345 MeV/u U beam. The U nuclide is converted at a target to fission fragments. The fragments of interest are collected and separated at an inflight separator, and are delivered to several experimental devices. The shell evolution programs at RIBF have been conducted with two methods; in-beam gamma spectroscopy and decay spectroscopy. A standard setup of in-beam gamma spectroscopy is combination of a NaI gamma detector array `DALI2' and a beam line spectrometer `ZeroDegree Spectrometer (ZDS)'. Coincidence measurements of de-excitation gamma rays at DALI2 and of reaction products at ZDS make it possible to select reaction channels event-by-event and to observe excited states of exotic nuclei in a specific reaction channel. Recently, a French-made thick liquid hydrogen target system `MINOS' has been introduced to access more neutron-rich nuclei. Isomer and beta-delayed gamma spectroscopy is organized with a Euroball germanium cluster array system `EURICA' and an active silicon stopper In this talk, I would like to

  19. Preliminary results and future activities at the GARFIELD apparatus

    NASA Astrophysics Data System (ADS)

    Gramegna, F.; Mastinu, P. F.; Vannucci, L.; Bruno, M.; D'Agostino, M.; Fiandri, L.; Lanchais, A.; Vannini, G.; Casini, G.; Chiari, M.; Nannini, A.; Bonasera, A.; Cavallaro, S.; Cosmano, A.; Moroni, A.; Ordine, A.; Abbondanno, U.; Milazzo, P. M.; Margagliotti, G. M.

    2002-01-01

    A new apparatus has been designed and built to study reaction mechanisms in the energy regime of the ALPI linear accelerator of the Laboratori Nazionali di Legnaro (E/A = 5 - 20 MeV). In this paper the importance of studying these mechanisms will be underlined, no more as a problem limited to a narrow energy range or a single process, but as a continuous trend from low to high energies and from the physics of stable nuclei to that one regarding instabilities. With this remarks in mind, a first experiment has been performed studying the reaction 32S+58Ni at 11AMeV. Preliminary results show that important information can be derived on multi-body emission, which can contribute to renew the interest in this energy regime.

  20. Vibration of a rolling wheel— preliminary results

    NASA Astrophysics Data System (ADS)

    Hemsworth, B.

    1983-03-01

    Preliminary results are presented of the axial vibration of a railway wheel on a vehicle travelling at speeds of up to 100 miles/h. Frequency analysis shows that the wheel response is resonant, at modes of vibration which have been identified from static tests. Further developments of measurement and analysis techniques will be necessary before a more complete picture of the importance of wheel vibration on wheel/rail noise radiation can be determined.

  1. Interferometer experiment on nimbus 3: preliminary results.

    PubMed

    Hanel, R; Conrath, B

    1969-09-19

    A Michelson interferometer spectrometer carried aboard the Nimbus 3 satellite, launched 14 April 1969, measured the spectrum between 400 and 2000 wave numbers with a resolution of 5 wave numbers. High-quality spectra have been obtained on a global scale, and preliminary results indicate that the absorption bands of carbon dioxide, water vapor, and ozone can be used to obtain vertical distributions of temperature, water vapor, and ozone.

  2. Recent results on giant dipole resonance decays in highly excited nuclei

    SciTech Connect

    Snover, K.A.

    1991-12-31

    Some recent results on Giant Dipole Resonance (GDR) decays in highly excited, equilibrated nuclei, are discussed based primarily on work done at Seattle. Four sections address the following topics: oblate shapes of rotating, highly excited Zr--Mo nuclei; adiabatic versus `motionally narrowed` GDR decay; large spin-driven deformations observed in hot medium-mass nuclei; and search for entrance channel effects in GDR decay following {sup 58}Ni {plus} {sup 92}Zr fusion. 22 refs.

  3. Recent results on giant dipole resonance decays in highly excited nuclei

    SciTech Connect

    Snover, K.A.

    1991-01-01

    Some recent results on Giant Dipole Resonance (GDR) decays in highly excited, equilibrated nuclei, are discussed based primarily on work done at Seattle. Four sections address the following topics: oblate shapes of rotating, highly excited Zr--Mo nuclei; adiabatic versus motionally narrowed' GDR decay; large spin-driven deformations observed in hot medium-mass nuclei; and search for entrance channel effects in GDR decay following [sup 58]Ni [plus] [sup 92]Zr fusion. 22 refs.

  4. Preliminary Results from the CHIPS Mission

    NASA Astrophysics Data System (ADS)

    Hurwitz, M.; Sasseen, T.; Marchant, W.; Sirk, M.; UC Berkeley CHIPS Instrument Team; SpaceDev Inc. CHIPS Spacecraft Team

    2003-03-01

    We present preliminary results from the Cosmic Hot Interstellar Plasma Spectrometer (``CHIPS") mission. CHIPS contains a grazing incidence spectrometer optimized for diffuse emission in the extreme ultraviolet band between 90 and 260 Angstroms, with a peak resolution of about 1.4 Angstroms. The spectrometer should provide unique and important new data on hot gas within the ``local bubble" of the interstellar medium. At the time this abstract was submitted, CHIPS had been successfully launched into a polar orbit, but commissioning of the spacecraft had only just begun. CHIPS is supported by NASA grant NAG5-5213.

  5. Stereoplotting Hominid Brain Endocasts : Some Preliminary Results

    NASA Astrophysics Data System (ADS)

    Holloway, Ralph L.

    1980-07-01

    To objectively and quantitatively demonstrate regional differences in brain endocast morphology, traditional anthropometric caliper measurements must be replaced by a system providing not only localness, but homology and reasonable freedom from allometric distortion. Stereoplotting the radial distances from endocast surface (the closest point to the once underlying brain cortex) to a homologous center every ten degrees provides some 300+ data points for each dorsal endocast surface, thus giving the requisite localness. These measurements provide a large matrix of data suitable for a number of multivariate statistical techniques, and the translation of such data and analyses to readily visualized maps, which can then be compared in relation to both taxonomic and functional knowledge about the cerebral surface. This paper descri-bes some preliminary results from using such methods on a sample of 64 undistorted endocasts composed of both pongids and fossil hominids. While sample sizes within taxonomic groups need to be augmented, the preliminary and tentative pilot studies conducted so far suggest that the method has excellent potential, and that two major areas of the brain endocast surface show the greatest shape changes : 1) the posterior association areas (inferior parietal lobule); 2) the anterior prefrontal areas.

  6. Pioneer Saturn infrared radiometer - Preliminary results

    NASA Technical Reports Server (NTRS)

    Ingersoll, A. P.; Neugebauer, G.; Orton, G. S.; Muench, G.; Chase, S. C.

    1980-01-01

    Preliminary results of the infrared radiometer experiment on Pioneer Saturn are reported. The instrument made use of two broadband channels centered at 20 and 45 microns which scan at a fixed 75-deg angle with respect to the spacecraft spin axis to acquire 10,000 image pairs of Saturn and its rings in the 2.5 h before closest approach, as well as several observations of Titan. The intensities of radiation observed in both bands indicate an effective temperature of 94.4 + or - 3 K for the planet, implying a total emission greater than twice the absorbed sunlight. Infrared data also indicates a molecular abundance of 0.85 for H2 relative to H2 + He, which can be improved by comparing the derived temperature profiles and radio occultation data. Planetary temperatures are found to range from a minimum of 83 to 140 K at the 1 bar level, with differences of 2.5 K between belts and zones up to the 0.06-bar level, while ring temperatures range from 60 to 70 K on the illuminated side and from less than 60 to 67 K in the planet's shadow and average 55 K on the unilluminated side. Preliminary estimates indicate a 45-micron brightness temperature of 80 + or - 10 K for Titan.

  7. Preliminary results from MERIS Land Algorithm

    NASA Astrophysics Data System (ADS)

    Gobron, N.; Pinty, B.; Taberner, M.; Melin, F.; Verstraete, M. M.; Widlowski, J.-L.

    2003-04-01

    This paper presents a first and preliminary evaluation of the performance of the algorithm implemented in the Medium Resolution Imaging Spectrometer (MERIS) ground segment for assessing the status of land surfaces. First, we propose an updated version of the MERIS algorithm itself, which improves the accuracy of the product. Second, we analyze the first results by inter-comparing the MERIS Global Vegetation Index (MGVI) to similar products derived from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) that are generated at the European Commission Joint Research Center (EC-JRC). The first evaluation between MERIS and SeaWiFS derived products is made using data acquired on the same day by both instruments. The results show acceptable agreement and the differences are well understood by radiation transfer model simulations.

  8. SLS-1 flight experiments preliminary significant results

    NASA Astrophysics Data System (ADS)

    1992-01-01

    Spacelab Life Sciences-1 (SLS-1) is the first of a series of dedicated life sciences Spacelab missions designed to investigate the mechanisms involved in the physiological adaptation to weightlessness and the subsequent readaptation to 1 gravity (1 G). Hypotheses generated from the physiological effects observed during earlier missions led to the formulation of several integrated experiments to determine the underlying mechanisms responsible for the observed phenomena. The 18 experiments selected for flight on SLS-1 investigated the cardiovascular, cardiopulmonary, regulatory physiology, musculoskeletal, and neuroscience disciplines in both human and rodent subjects. The SLS-1 preliminary results gave insight to the mechanisms involved in the adaptation to the microgravity environment and readaptation when returning to Earth. The experimental results will be used to promote health and safety for future long duration space flights and, as in the past, will be applied to many biomedical problems encountered here on Earth.

  9. SLS-1 flight experiments preliminary significant results

    NASA Technical Reports Server (NTRS)

    1992-01-01

    Spacelab Life Sciences-1 (SLS-1) is the first of a series of dedicated life sciences Spacelab missions designed to investigate the mechanisms involved in the physiological adaptation to weightlessness and the subsequent readaptation to 1 gravity (1 G). Hypotheses generated from the physiological effects observed during earlier missions led to the formulation of several integrated experiments to determine the underlying mechanisms responsible for the observed phenomena. The 18 experiments selected for flight on SLS-1 investigated the cardiovascular, cardiopulmonary, regulatory physiology, musculoskeletal, and neuroscience disciplines in both human and rodent subjects. The SLS-1 preliminary results gave insight to the mechanisms involved in the adaptation to the microgravity environment and readaptation when returning to Earth. The experimental results will be used to promote health and safety for future long duration space flights and, as in the past, will be applied to many biomedical problems encountered here on Earth.

  10. Breakthrough Propulsion Physics Workshop Preliminary Results

    NASA Technical Reports Server (NTRS)

    Millis, Marc G.

    1997-01-01

    In August, 1997, a NASA workshop was held to assess the prospects emerging from physics that might lead to creating the ultimate breakthroughs in space transportation: propulsion that requires no propellant mass, attaining the maximum transit speeds physically possible, and breakthrough methods of energy production to power such devices. Because these propulsion goals are presumably far from fruition, a special emphasis was to identify affordable, near-term, and credible research that could make measurable progress toward these propulsion goals. Experiments and theories were discussed regarding the coupling of gravity and electromagnetism, vacuum fluctuation energy, warp drives and wormholes, and superluminal quantum tunneling. Preliminary results of this workshop are presented, along with the status of the Breakthrough Propulsion Physics program that conducted this workshop.

  11. Preliminary Proton Spin Asymmetry Results from SANE

    NASA Astrophysics Data System (ADS)

    Maxwell, James

    2010-11-01

    The Spin Asymetries of the Nucleon Experiment (SANE) is a measurement of parallel and near-perpendicular double spin asymmetries in an inclusive electron scattering experiment, with the aim of calculating the spin asymmetry of the proton A^1p and spin structure function g^2p. Using Thomas Jefferson National Accelerator Facility's polarized electron beam and the University of Virginia's polarized frozen ammonia (^14NH3) target in Hall C, the experiment ran in 2009, collecting data in a Q^2 region from 2.5 to 6.5 GeV^2 in a Bjorken x region of 0.3 to 0.8. Particle detection was accomplished using the Big Electron Telescope Array (BETA), a novel non-magnetic detector array with a 194 msr acceptance. This talk will address the progress of the analysis toward the calculation of the proton spin asymmetry and structure functions, including calibration of the BETA detectors, event selection, and preliminary results.

  12. Breakthrough propulsion physics workshop preliminary results

    SciTech Connect

    Millis, Marc G.

    1998-01-15

    In August, 1997, a NASA workshop was held to assess the prospects emerging from physics that might lead to creating the ultimate breakthroughs in space transportation: propulsion that requires no propellant mass, attaining the maximum transit speeds physically possible, and breakthrough methods of energy production to power such devices. Because these propulsion goals are presumably far from fruition, a special emphasis was to identify affordable, near-term, and credible research that could make measurable progress toward these propulsion goals. Experiments and theories were discussed regarding the coupling of gravity and electromagnetism, vacuum fluctuation energy, warp drives and wormholes, and superluminal quantum tunneling. Preliminary results of this workshop are presented, along with the status of the Breakthrough Propulsion Physics program that conducted this workshop.

  13. ESA's Biopan 1--"Vitamin" experiment preliminary results.

    PubMed

    Moatti, J P; Dousset, N; Moatti, N; Degre, M; Eche, B; Gasset, G; Tixador, R

    1995-01-01

    The purpose of "Vitamin" experiment is to study the efficiency of protective substances on three biological acellular systems aqueous solutions exposed to cosmic radiation in space. The first system "LDL" is a low density lipoprotein. The second is "E2-TeBG complexe" in which estradiol (E2) is bound to its plasmatic carrier protein, testosterone-estradiol binding globulin (TeBG). The third is "pBR 322", a plasmid. "Vitamin" experiment was accommodated in the Biopan which had been mounted on the outer surface of a Foton retrievable satellite. The experiment was exposed to space environment during 15 days. A stable temperature of about 2O degrees C was maintained throughout the flight. "Vitamin" experiment preliminary results are presented and discussed.

  14. Prostate elastography: preliminary in vivo results

    NASA Astrophysics Data System (ADS)

    Alam, S. K.; Feleppa, E. J.; Kalisz, A.; Ramchandran, S.; Ennis, R. D.; Lizzi, Frederick L.; Wuu, C.-S.; Ketterling, Jeffrey A.

    2005-04-01

    We report preliminary results from our investigation of in vivo prostate elastography. Fewer than 50% of all prostate cancers are typically visible in current clinical imaging modalities. Elastography displays a map of strain that results when tissue is externally compressed. Thus, elastography is ideal for imaging prostate cancers because they are generally stiffer than the surrounding tissue and stiffer regions usually exhibit lower strain in elastograms. In our study, digital radio-frequency (RF) ultrasound echo data were acquired from prostate-cancer patients undergoing brachytherapy. Seed placement is guided by a transrectal ultrasound (TRUS) probe, which is held in a mechanical fixture. The probe can be moved in XYZ directions and tilted. The probe face, in contact with the rectal wall, is used to apply a compression force to the immediately adjacent prostate. We also used a water-filled (acoustic) coupling balloon to compress the prostate by increasing the water volume inside the balloon. In each scan plane (transverse), we acquired RF data from successive scans at the scanner frame rate as the deformation force on the rectal wall was continuously increased. We computed strain using 1D RF cross-correlation analysis. The compression method based on fixture displacement produced low-noise elastograms that beautifully displayed the prostate architecture and emphasized stiff areas. Balloon-based compression also produced low-noise elastograms. Initial results demonstrate that elastography may be useful in the detection and evaluation of prostate cancers, occult in conventional imaging modalities.

  15. Overweight and urban pollution: preliminary results.

    PubMed

    Ponticiello, Barnaba Giuseppina; Capozzella, Assunta; Di Giorgio, Valeria; Casale, Teodorico; Giubilati, Roberto; Tomei, Gianfranco; Tomei, Francesco; Rosati, Maria Valeria; Sancini, Angela

    2015-06-15

    The aim of this study is to determine whether in workers exposed to urban pollution the risk of developing overweight and obesity is higher in workers exposed to urban pollution compared to a control group. The study was conducted on 150 volunteers, 75 workers exposed to urban pollution (50 women and 25 men) and 75 indoor workers (50 women and 25 men). Once measured the weight and height and calculated body mass index (BMI) for each worker, the research was based on the comparison, between the two groups, of the mean values of the measurements and of the frequency of workers with BMI index higher than the cut-off of normality. The only statistically significant difference found was for the mean value of weight in women, which was higher among outdoor workers compared to indoor workers. The mean values of BMI and the frequency of workers with BMI higher than normal was higher among outdoor workers compared to indoor workers in both sexes, but not statistically significant. The data suggest that outdoor workers may be subject to an additional risk of developing obesity as a result of exposure to urban air pollution (which, like obesity, is a source of oxidative stress). So, our preliminary study encourages to continue this line of research by implementing the sample and considering all the confounding factors. Furthermore, the results highlight the necessity to take account of gender differences in the context of health surveillance of workers.

  16. Preliminary results from an advanced lighting controlstestbed

    SciTech Connect

    Avery, Douglas; Jennings, Judity; Rubinstein, Francis

    1998-03-01

    Preliminary results from a large-scale testbed of advanced lighting control technologies at the Phillip Burton Federal Building at 450 Golden Gate Ave. in San Francisco are presented. The first year objective of this project is to determine the sustainable energy savings and cost-effectiveness of different lighting control technologies compared to a portion of the building where only minimal controls are installed. The paper presents the analyzed results from six months of tests focused on accurately characterizing the energy savings potential of one type of daylight-linked lighting controls compared to the lighting in similar open-planned areas without dimming controls. After analyzing a half year;s data, we determined that the annual energy savings for this type of daylight- linked controls was 41% and 30% for the outer rows of lights on the South and North sides of the building, respectively. The annual energy savings dropped to 22% and 16% for the second row of lights for the South and North, respectively, and was negligible for the third rows of lights.

  17. The viking biological investigation: preliminary results.

    PubMed

    Klein, H P; Horowitz, N H; Levin, G V; Oyama, V I; Lederberg, J; Rich, A; Hubbard, J S; Hobby, G L; Straat, P A; Berdahl, B J; Carle, G C; Brown, F S; Johnson, R D

    1976-10-01

    Three different types of biological experiments on samples of martian surface material ("soil") were conducted inside the Viking lander. In the carbon assimilation or pyrolytic release experiment, (14)CO(2) and (14)CO were exposed to soil in the presence of light. A small amount of gas was found to be converted into organic material. Heat treatment of a duplicate sample prevented such conversion. In the gas exchange experiment, soil was first humidified (exposed to water vapor) for 6 sols and then wet with a complex aqueous solution of metabolites. The gas above the soil was monitored by gas chromatography. A substantial amount of O(2) was detected in the first chromatogram taken 2.8 hours after humidification. Subsequent analyses revealed that significant increases in CO(2) and only small changes in N(2) had also occurred. In the labeled release experiment, soil was moistened with a solution containing several (14)C-labeled organic compounds. A substantial evolution of radioactive gas was registered but did not occur with a duplicate heat-treated sample. Alternative chemical and biological interpretations are possible for these preliminary data. The experiments are still in process, and these results so far do not allow a decision regarding the existence of life on the plonet Mars.

  18. Preliminary test results for the SVX4

    SciTech Connect

    Christofek, L.; Hanagaki, K.; Rapidis, P.; Utes, M.; /Fermilab

    2005-06-01

    We present and summarize the preliminary test results for SVX4 chip testing. There are presently two versions of the SVX4. Version 2 has on-chip bypassing and Version 1 does not. The on-chip bypassing is a layer of transistors under the front-end analog pipeline that acts as a bypassing capacitor for the voltage supply. Its size is about a microfarad. We aggressively choose to test Version 2 because of this feature. The feature is advantageous for hybrid design because it eliminates the need for an additional passive component on the hybrid itself by placing it on the actual SVX4 die. Also, the SVX4 was designed to operate in two modes: D. and CDF. One can set which mode the chip will operate by placing a jumper in the proper position on the SVX4 chip carrier. In either mode, the chip can either use the operating parameters from the shift register or the shadow register. Similarly, this is selected by placing a jumper on the SVX4 chip carrier. This chip has this feature because it was unknown whether the new design of the shadow register would be operable. The shadow register is also call the SEU register or Single Event Upset register. An introduction into the functionality of the chip and an explanation on the difference between D. and CDF mode can be found in the SVX4 User's Manual [1].

  19. Mars Express Bistatic Radar: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Simpson, R. A.; Tyler, G. L.; Paetzold, M.

    2005-08-01

    Bistatic radar, conducted at microwave frequencies, can be a convenient and cost-effective method for probing planetary surfaces at centimeter scales - dimensions of interest in selecting lander and rover sites, for example. Half a dozen such experiments have been conducted using Mars Express in a new mode, which relies on relative echo strengths in two orthogonal polarizations rather than absolute calibration of a single polarization (see Simpson and Tyler, ICARUS 152, pp 70-74, 2001). Observations conducted to date have been limited to a fixed spacecraft attitude (inertial pointing); so dielectric constant estimates are valid at only one specular point per wavelength per experiment. Preliminary results have been obtained for Vastitas Borealis (64.1N, 60.1E), the southeast rim of Argyre (56.0S, 324.8E), and plains west of Argyre (51.0S, 289.4E). Dielectric constants are N/A and 2.7, 2.0 and 2.1, and 3.2 and 3.5 at the three sites at 3.5 and 13.1 cm wavelengths, respectively. These confirm spatial variability (while being within the nominal range for Mars) and show the expected lower values at shorter wavelengths.

  20. Preliminary Results of the MARE Experiment

    NASA Astrophysics Data System (ADS)

    Ferri, E.; Bagliani, D.; Biassotti, M.; Ceruti, G.; Corsini, D.; Faverzani, M.; Gatti, F.; Giachero, A.; Gotti, C.; Kilbourne, C.; Kling, A.; Kraft-Bermuth, S.; Maino, M.; Manfrinetti, P.; Nucciotti, A.; Pessina, G.; Pizzigoni, G.; Ribeiro Gomes, M.; Schaeffer, D.; Sisti, M.

    2014-09-01

    The microcalorimeter array for a rhenium experiment (MARE) project aims at the direct and calorimetric measurement of the electron neutrino mass with sub-eV sensitivity. The design is based on large arrays of thermal detectors to study the beta decay of Re and the electron capture of Ho. One of the activities of the project, MARE 1 in Milan, has started in Milan using one array of 6 6 silicon implanted thermistors equipped with AgReO absorbers. The purposes of MARE 1 in Milan are to achieve a sensitivity on the neutrino mass of a few eV and to investigate the systematics of Re neutrino mass measurements, focusing on those caused by the beta environmental fine structure and the beta spectrum theoretical shape. In parallel, the MARE collaboration is performing an R&D work for producing absorbers embedded with radioactive metal Ho. We report here the status of MARE using Re as beta source and the preliminary results obtained with Ho.

  1. Preliminary results of radiation measurements on EURECA

    SciTech Connect

    Benton, E.V.; Frank, A.L.

    1995-03-01

    The eleven-month duration of the EURECA mission allows long-term radiation effects to be studied similarly to those of the Long Duration Exposure Facility (LDEF). Basic data can be generated for projections to crew doses and electronic and computer reliability on spacecraft missions. A radiation experiment has been designed for EURECA which uses passive integrating detectors to measure average radiation levels. The components include a Trackoscope, which employs fourteen plastic nuclear track detector (PNTD) stacks to measure the angular dependence of high LET (greater than or equal to 6 keV/micro m) radiation. Also included are TLD`s for total absorbed doses, thermal/resonance neutron detectors (TRND`s) for low energy neutron fluences and a thick PNTD stack for depth dependence measurements. LET spectra are derived from the PNTD measurements. Preliminary TLD results from seven levels within the detector array show that integrated dose inside the flight canister varied from 18.8 +/- 0.6 cGy to 38.9 +/- 1.2 cGy. The TLD`s oriented toward the least shielded direction averaged 53% higher in dose than those oriented away from the least shielded direction (minimum shielding toward the least shielded direction varied from 1.13 to 7.9 g/cm(exp 2), Al equivalent). The maximum dose rate on EURECA (1.16 mGy/day) was 37% of the maximum measured on LDEF and dose rates at all depths were less than measured on LDEF. The shielding external to the flight canister covered a greater solid angle about the canister than the LDEF experiments.

  2. Global Geologic Mapping of Io: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Williams, David A.; Keszthelyi, L. P.; Crown, D. A.; Geissler, P. E.; Schenk, P. M.; Yff, Jessica; Jaeger, W. L.; Rathbun, J. A.

    2008-01-01

    A new global geologic map of Jupiter's volcanic moon, Io is being prepared, with the focus being on completion of a draft map by July 2008. Here initial results of the mapping are reported: a preliminary distribution of material units in terms of areas and a visual representation. Additionally, the mapping hopes to address some of the problems in Io geology. Thus far it has been discovered that Io's surface is dominated by plains material, thought to consist of Io's silicate crust covered by pyroclastic deposits and lava flows of silicate and sulfur-bearing composition. Many plains areas contain flow fields that cannot be mapped separately due to a lack of resolution or modification by alteration processes. Discrete lava flows and flow fields are the next most abundant unit, with bright (sulfur?) flows in greater abundance than dark (silicate?) flows. The source of most of Io's heat flow, the paterae, are the least abundant unit in terms of areal extent.Upon completion of the draft map for peer review, it will be used to investigate several specific questions about the geological evolution of Io that previously could not be well addressed, including: comparison of the areas versus the heights of Ionian mountains to assess their stability and evolution; correlation and comparison of Galileo Near-Infrared Mapping Spectrometer and Photopolarimeter-Radiometer hot spot locations with the mapped location of dark versus bright lava flows and patera floors to assess any variations in the types of sources for Io's active volcanism; and the creation of a global inventory of the areal coverage of dark and bright laval flows to assess the relative importance of sulfur versus silicate volcanism in resurfacing Io, and to assess whether there are regional concentrations of either style of volcanism that may have implications on interior processes.

  3. Tellurium in active volcanic environments: Preliminary results

    NASA Astrophysics Data System (ADS)

    Milazzo, Silvia; Calabrese, Sergio; D'Alessandro, Walter; Brusca, Lorenzo; Bellomo, Sergio; Parello, Francesco

    2014-05-01

    Tellurium is a toxic metalloid and, according to the Goldschmidt classification, a chalcophile element. In the last years its commercial importance has considerably increased because of its wide use in solar cells, thermoelectric and electronic devices of the last generation. Despite such large use, scientific knowledge about volcanogenic tellurium is very poor. Few previous authors report result of tellurium concentrations in volcanic plume, among with other trace metals. They recognize this element as volatile, concluding that volcanic gases and sulfur deposits are usually enriched with tellurium. Here, we present some results on tellurium concentrations in volcanic emissions (plume, fumaroles, ash leachates) and in environmental matrices (soils and plants) affected by volcanic emissions and/or deposition. Samples were collected at Etna and Vulcano (Italy), Turrialba (Costa Rica), Miyakejima, Aso, Asama (Japan), Mutnovsky (Kamchatka) at the crater rims by using common filtration techniques for aerosols (polytetrafluoroethylene filters). Filters were both eluted with Millipore water and acid microwave digested, and analyzed by inductively coupled plasma mass spectrometry (ICP-MS). Volcanic ashes emitted during explosive events on Etna and Copahue (Argentina) were analyzed for tellurium bulk composition and after leaching experiments to evaluate the soluble fraction of tellurium. Soils and leaves of vegetation were also sampled close to active volcanic vents (Etna, Vulcano, Nisyros, Nyiragongo, Turrialba, Gorely and Masaya) and investigated for tellurium contents. Preliminary results showed very high enrichments of tellurium in volcanic emissions comparing with other volatile elements like mercury, arsenic, thallium and bismuth. This suggests a primary transport in the volatile phase, probably in gaseous form (as also suggested by recent studies) and/or as soluble salts (halides and/or sulfates) adsorbed on the surface of particulate particles and ashes. First

  4. First-principles results for electromagnetic properties of s d shell nuclei

    NASA Astrophysics Data System (ADS)

    Saxena, Archana; Srivastava, Praveen C.

    2017-08-01

    In this work we present ab initio shell-model calculations for electric quadrupole moments and magnetic dipole moments of s d shell nuclei using valence-space Hamiltonians derived with two ab initio approaches: the in-medium similarity renormalization group (IM-SRG) and the coupled-cluster effective interaction (CCEI). Results are in reasonable agreement with the available experimental data as well as with the results from the phenomenological USDB effective interaction. This work will add more information to the available ab initio results for the spectroscopy of s d shell nuclei.

  5. X-48B Preliminary Flight Test Results

    NASA Technical Reports Server (NTRS)

    Taylor, Brian R.

    2009-01-01

    This slide presentation reviews the preliminary Flight tests of the X-48B development program. The X-48B is a blended wing body aircraft that is being used to test various features of the BWB concept. The research concerns the following: (1) Turbofan Development, (2) Intelligent Flight Control and Optimization, (3) Airdata Calibration (4) Parameter Identification (i.e., Determination of the parameters of a mathematical model of a system based on observation of the system inputs and response.)

  6. Archaeogeophysical investigations in Tiwanaku: preliminary results

    NASA Astrophysics Data System (ADS)

    Masini, Nicola; Sileo, Maria; Lasaponara, Rosa; Leucci, Giovanni; Orefici, Giuseppe; Rizzo, Enzo

    2017-04-01

    -1450) Tiwanaku was characterized by the resurgence of regional identities and polities In spite of the rich archaeological record numerous issues, related to the function and the extension of Tiwanaku, need to be investigated especially in the monumental core which includes the pyramid of Akapana, and other ceremonial places such Kalasasaya, Putuni and Kantatallita. To this aims some geophysical investigations were performed in 2009 and 2014 in the context of multidisciplinary research including the use of satellite remote sensing [8]. This paper deals with the discussion of preliminary results of geomagnetic and GPR investigations, some of which have been verified by trial archaeological excavations which have unearthed some buried structures, improving the knowledge of the ceremonial areas of Tiwanaku. References [1] Lasaponara R., Leucci G., Masini N., Persico R., Scardozzi G., Towards an operative use of remote sensing for exploring the past using satellite data: The case study of Hierapolis (Turkey), Remote sensing of Environment, 174 (2016) : 148-164, doi:10.1016/j.rse.2015.12.016 [2] Masini N., Lasaponara R., Rizzo E., Orefici G. 2012. Integrated Remote Sensing Approach in Cahuachi (Peru): Studies and Results of the ITACA Mission (2007-2010), In: Lasaponara R., Masini N. (Eds) 2012, Satellite Remote Sensing: a new tool for Archaeology, Springer, Verlag Berlin Heidelberg, ISBN 978-90-481-8800-0, doi: 10.1007/978-90-481-8801-7_14; pp. 307-344 [3] Rizzo E., Masini N., Lasaponara R., Orefici G. 2010, ArchaeoGeophysical methods in the Templo del Escalonado (Cahuachi, Nasca, Perù), Near Surface Geophysics 8 (5), 433-439, doi:10.3997/1873-0604.2010030 [4] Masini N., Rizzo E., Lasaponara R., and Orefici G. 2008, Integrated remote sensing techniques for the detection of buried archaeological adobe structures: preliminary results in Cahuachi (Peru), Advances in Geosciences, 19, 75-82 [5] Lasaponara R., Leucci G., Masini N., Persico R. 2014. Investigating archaeological looting

  7. High intensity copper atom beam - Preliminary results

    NASA Technical Reports Server (NTRS)

    Kelly, A. J.; Santavicca, D.

    1973-01-01

    The development of a nozzle which gas-dynamically accelerates neutral copper atoms at controlled energy levels and flux rates suitable for the investigation of inelastic copper atom collision processes is reported. Preliminary test data demonstrate that vapor-deposited rhenium nozzles do not degrade in the presence of copper vapor at high temperatures. Operation with high purity helium gas at nozzle stagnation temperatures in the range 2650-2700 K and total stagnation pressures from 1/4 to 2 atm with continuous copper atom flux rates of approximately 10 to the 18th power per second has been maintained, for a total time of 8-1/2 h to date.

  8. Pioneer 10 infrared radiometer experiment: preliminary results.

    PubMed

    Chase, S C; Ruiz, R D; Münch, G; Neugebauer, G; Schroeder, M; Trafton, L M

    1974-01-25

    Thermal maps of Jupiter at 20 and 40 micrometers show structure closely related to the visual appearance of the planet. Peak brightness temperatures of 126 degrees and 145 degrees K have been measured on the South Equatorial Belt, for the 20- and 40-micrometer channels, respectively. Corresponding values for the South Tropical Zone are 120 degrees and 138 degrees K. No asymmetries between the illuminated sunlit and nonilluminated parts of the disk were found. A preliminary discussion of the data, in terms of simple radiative equilibrium models, is presented. The net thermal energy of the planet as a whole is twice the solar energy input.

  9. Recent results at ultrahigh spin: Terminating states and beyond in mass 160 rare-earth nuclei

    DOE PAGES

    Paul, E. S.; Rees, J. M.; Hampson, P.; ...

    2015-01-01

    A classic region of band termination at high spin occurs in rare-earth nuclei with around ten valence nucleons above the 146Gd closed core. The results are presented here for such non-collective oblate (γ = 60°) terminating states in odd-Z 155Ho, odd–odd 156Ho, and even–even 156Er, where they are compared with neighboring nuclei. In addition to these particularly favoured states, the occurrence of collective triaxial strongly deformed (TSD) bands, bypassing the terminating states and extending to over 65ℏ, is reviewed.

  10. Recent results at ultrahigh spin: Terminating states and beyond in mass 160 rare-earth nuclei

    SciTech Connect

    Paul, E. S.; Rees, J. M.; Hampson, P.; Riley, M. A.; Simpson, J.; Ayangeakaa, A. D.; Baron, J. S.; Carpenter, M. P.; Chiara, C. J.; Garg, U.; Hartley, D. J.; Hoffman, C. R.; Janssens, R. V. F.; Kondev, F. G.; Lauritsen, T.; Mason, P. J. R.; Matta, J.; Miller, S. L.; Nolan, P. J.; Ollier, J.; Petri, M.; Radford, D. C.; Revill, J. P.; Wang, X.; Zhu, S.; Ragnarsson, I.

    2015-01-01

    A classic region of band termination at high spin occurs in rare-earth nuclei with around ten valence nucleons above the 146Gd closed core. The results are presented here for such non-collective oblate (γ = 60°) terminating states in odd-Z 155Ho, odd–odd 156Ho, and even–even 156Er, where they are compared with neighboring nuclei. In addition to these particularly favoured states, the occurrence of collective triaxial strongly deformed (TSD) bands, bypassing the terminating states and extending to over 65ℏ, is reviewed.

  11. Preliminary Results of Field Emission Cathode Tests

    NASA Technical Reports Server (NTRS)

    Sovey, James S.; Kovaleski, Scott D.

    2001-01-01

    Preliminary screening tests of field emission cathodes such as chemical vapor deposited (CVD) diamond, textured pyrolytic graphite, and textured copper were conducted at background pressures typical of electric thruster test facilities to assess cathode performance and stability. Very low power electric thrusters which provide tens to hundreds micronewtons of thrust may need field emission neutralizers that have a capability of tens to hundreds of microamperes. From current voltage characteristics, it was found that the CVD diamond and textured metals cathodes clearly satisfied the Fowler-Nordheim emission relation. The CVD diamond and a textured copper cathode had average current densities of 270 and 380 mA/sq cm, respectively, at the beginning-of-life. After a few hours of operation the cathode emission currents degraded by 40 to 75% at background pressures in the 10(exp -5) Pa to 10(exp -4) Pa range. The textured pyrolytic graphite had a modest current density at beginning-of-life of 84 mA/sq cm, but this cathode was the most stable of all. Extended testing of the most promising cathodes is warranted to determine if current degradation is a burn-in effect or whether it is a long-term degradation process. Preliminary experiments with ferroelectric emission cathodes, which are ceramics with spontaneous electric polarization, were conducted. Peak current densities of 30 to 120 mA/sq cm were obtained for pulse durations of about 500 ns in the 10(exp -4) Pa pressure range.

  12. Improved self-exclusion program: preliminary results.

    PubMed

    Tremblay, Nicole; Boutin, Claude; Ladouceur, Robert

    2008-12-01

    The gambling industry has offered self-exclusion programs for quite a long time. Such measures are designed to limit access to gaming opportunities and provide problem gamblers with the help they need to cease or limit their gambling behaviour. However, few studies have empirically evaluated these programs. This study has three objectives: (1) to observe the participation in an improved self-exclusion program that includes an initial voluntary evaluation, phone support, and a mandatory meeting, (2) to evaluate satisfaction and usefulness of this service as perceived by self-excluders, (3) to measure the preliminary impact of this improved program. One hundred sixteen self-excluders completed a questionnaire about their satisfaction and their perception of the usefulness during the mandatory meeting. Among those participants, 39 attended an initial meeting. Comparisons between data collected at the initial meeting and data taken at the final meeting were made for those 39 participants. Data showed that gamblers chose the improved self-exclusion program 75% of the time; 25% preferred to sign a regular self-exclusion contract. Among those who chose the improved service, 40% wanted an initial voluntary evaluation and 37% of these individuals actually attended that meeting. Seventy percent of gamblers came to the mandatory meeting, which was a required condition to end their self-exclusion. The majority of participants were satisfied with the improved self-exclusion service and perceived it as useful. Major improvements were observed between the final and the initial evaluation on time and money spent, consequences of gambling, DSM-IV score, and psychological distress. The applicability of an improved self-exclusion program is discussed and, as shown in our study, the inclusion of a final mandatory meeting might not be so repulsive for self-excluders. Future research directives are also proposed.

  13. Preliminary Results on the Experimental Investigation of the Structure Functions of Bound Nucleons

    SciTech Connect

    Bodek, Arie

    2016-08-01

    We present preliminary results on an experimental study of the nuclear modification of the longitudinal ($\\sigma_L$) and transverse ($\\sigma_T$) structure functions of nucleons bound in nuclear targets. The origin of these modifications (commonly referred as as the EMC effect) is not fully understood. Our measurements of R= $\\sigma_L / \\sigma_T$ for nuclei ($R_A$) and for deuterium ($R_D$) indicate that nuclear modifications of the structure functions of bound nucleons are different for the longitudinal and transverse structure functions, and that contrary to expectation from several theoretical models, $R_A< R_D$.

  14. Results from Effervescent Spray Atomization for MCB and a preliminary Proposal for Field Experiments

    NASA Astrophysics Data System (ADS)

    Neukermans, A.; Cooper, G. F.; Foster, J. D.; Galbraith, L. K.; Jain, S.; Ormond, R.

    2014-12-01

    We report on the preliminary results of spraying saltwater using a variant of effervescent spray atomization (ESA), for the purpose of producing salt nuclei for Marine Cloud Brightening (MCB). ESA is a well known industrial method, where air and water are mixed, to produce a choked two phase flow in a nozzle. The choked flow leaves a pressure residue at the nozzle exit which produces very efficient atomization. The resulting measured salt aerosol appears to be smaller than what is expected from current ESA theories. As measured with standard and well calibrated standard aerosol instruments, the distribution of the salt nuclei has an approximately log normal distribution with mean diameter of 60-80 nm and a GSD close to 2. Measured by electrostatic precipitation of the aerosol on a Si wafer and SEM observation, the median diameter is almost 1.5-2x as large, and this discrepancy has to date not been fully resolved. While the observed median diameter is perhaps somewhat on the low side for efficient conversion in the clouds, this nuclei distribution should be useful for preliminary field experiments. Assuming this distribution, with very simple means, a single small nozzle 150 um in diameter produces 5.3 x1012 nuclei/sec. A few hundred nozzles would be sufficient to produce 1015 nuclei/sec, requiring a power of only 25 kW, although errors on the tail end of the distribution could easily double this figure. To lift the spray, we envision the nozzles easily integrated in standard snowmaking machines, which are estimated by their manufactures to lift the nuclei from 50-100 m in the air, requiring another 20 kW of power. In cooperation with and under the scientific guidance of the U. of Washington, we propose to develop a set of staggered MCB experimental tests in Central California, first on land, and subsequently over the ocean. While this method may not be the ultimate one desired for full deployment (If ever), its simplicity, low cost and ease of deployment would seem

  15. Earth Radiation Budget Experiment - Preliminary seasonal results

    NASA Technical Reports Server (NTRS)

    Barkstrom, Bruce R.; Harrison, Edwin F.; Lee, Robert B., III

    1990-01-01

    Data from the Earth Radiation Budget Satellite (ERBS) and from the operational NOAA-9 satellite being placed in the archive of the earth Radiation Budget Experiment (ERBE) are discussed. The results of the ERBE data validation effort are reviewed along with ERBE solar constant observations and earth-viewing results. The latter include monthly average results for July 1985, annual average clear-sky fluxes, and annual average, zonal, and global results.

  16. Preliminary Results from the Lunar Prospector Alpha Particle Spectrometer

    NASA Astrophysics Data System (ADS)

    Lawson, S. L.; Feldman, W. C.; Moore, K. R.; Lawrence, D. J.; Maurice, S.; Belian, R. D.; Binder, A. B.

    2001-03-01

    Data measured using the Lunar Prospector Alpha Particle Spectrometer were surveyed to search for surface deposits of polonium-210. Preliminary results show that a marginal, yet statistically-significant signal was indeed detected on the lunar front side.

  17. Results for p-shell nuclei at LO, NLO, and N2LO in chiral EFT

    NASA Astrophysics Data System (ADS)

    Maris, Pieter; Vary, James

    2016-09-01

    We present results for p-shell nuclei using interactions derived from chiral effective field theory up to N2LO. The many-body calculations are performed order-by-order in the chiral expansion. We show the dependence of the ground state energies on the chiral order; we also present excitation energies of narrow excited states and other observables such as magnetic and quadrupole moments of selected ground states. We discuss both the theoretical uncertainties due to the truncation of the chiral expansion, as well as the numerical uncertainties associated with the many-body method. Supported by the US DOE Grants DESC0008485 (SciDAC/NUCLEI) and DE-FG02-87ER40371. Computational resources provided by NERSC, supported under US DOE Contract DE-AC02-05CH11231, and by the ALCF, supported under US DOE Contract DE-AC02-06CH11357.

  18. Preliminary results of steel containment vessel model test

    SciTech Connect

    Luk, V.K.; Hessheimer, M.F.; Matsumoto, T.; Komine, K.; Arai, S.; Costello, J.F.

    1998-04-01

    A high pressure test of a mixed-scaled model (1:10 in geometry and 1:4 in shell thickness) of a steel containment vessel (SCV), representing an improved boiling water reactor (BWR) Mark II containment, was conducted on December 11--12, 1996 at Sandia National Laboratories. This paper describes the preliminary results of the high pressure test. In addition, the preliminary post-test measurement data and the preliminary comparison of test data with pretest analysis predictions are also presented.

  19. [Preliminary results of treatment with aflibercept].

    PubMed

    Blăjan, Codruta; Nicula, D; Rusu, Ioana

    2014-01-01

    The paper presents the first results concerning the Aflibercept (Eylea) treatment, the last antiVEGF approved for treatment of the age related macular degeneration (AMD), neovascular form and for macular edema due to the central retinal vein occlusion. The treatment was applied to patients presenting AMD, ME and other diseases: myopic and idiopatic choroidal neovascularisation, central serous choroidopathy (CSC) or diabetic macular edema (DME). The results were good: improvement of the visual acuity, resolution of the intraretinal fluids and macular edema. Although we did not notice major side-effects, resistance or tachyphylaxis, we noticed some recurrences.

  20. [Ultrasonic welding of bones. Preliminary results].

    PubMed

    Brug, E; Braunsteiner, E; von Gemmern, C

    1976-10-01

    Experiments with ultrasonic applied welding, a method first developed in the USSR are reported. In standardized isolated bone preparations stability values could be obtained of 10% [and in one case of 40% (!)] of the stability of the nonfractured bone. With these values the requirements of the method of osteosynthesis are met. Results of in vivo experiments are expected.

  1. Preliminary Youth Risk Behavior Survey Results--1993.

    ERIC Educational Resources Information Center

    Johnson, Joyce, Comp.

    This paper provides the results of a 1993 survey of 2,684 New Hampshire high school students in regard to risk taking, personal violence, suicide, tobacco use, alcohol abuse, drug abuse, acquired immune deficiency syndrome (AIDS) education, sexual activity, nutrition, and exercise. It found that in the preceding 30 days, 10.8 percent of students…

  2. Preliminary Silver-hydrogen Cell Test Results

    NASA Technical Reports Server (NTRS)

    Lurie, C.

    1984-01-01

    Silver-hydrogen cells were tested. The objective of the test was to estimate useful life by operation at accelerated, simulated geosynchronous orbit conditions. Ten simulated seasons were run and are summarized. The results to-date reflect stable, trouble-free performance and indicate that the silver-hydrogen couple shows promise as a lightweight alternative to the nickel systems.

  3. Pioneer 11 meteoroid detection experiment - Preliminary results

    NASA Technical Reports Server (NTRS)

    Humes, D. H.; Alvarez, J. M.; Kinard, W. H.; Oneal, R. L.

    1975-01-01

    The concentration of meteoroids of mass about 0.01 microgram in interplanetary space, in the asteroid belt, and near Jupiter has been measured. The data confirm the Pioneer 10 observation that the asteroid belt is not highly populated with small meteoroids, suggest that the high concentration of small particles around Jupiter is the result of gravitational focusing, and provide an indication of the mass distribution of meteoroids in interplanetary space.

  4. Medical Radioisotope Data Survey: 2002 Preliminary Results

    SciTech Connect

    Siciliano, Edward R.

    2004-06-23

    A limited, but accurate amount of detailed information about the radioactive isotopes used in the U.S. for medical procedures was collected from a local hospital and from a recent report on the U.S. Radiopharmaceutical Markets. These data included the total number of procedures, the specific types of procedures, the specific radioisotopes used in these procedures, and the dosage administered per procedure. The information from these sources was compiled, assessed, pruned, and then merged into a single, comprehensive and consistent set of results presented in this report. (PIET-43471-TM-197)

  5. [Hearing screening of newborns. Preliminary results].

    PubMed

    Courtmans, I; Mancilla, V; Ligny, C; Belhadi, B; Damis, E; Mahillon, P

    2005-02-01

    Since 1976, an hearing screening is organized at the Clinic Edith Cavell. The testing was based on a behavioral technique of Veit-Bizaguet and, since 2001, the otoacoustic emissions are realised. The National Institutes of Health (1993) recommends universal newborn hearing screening of all newborns before 3 months of age and identification and treatment before 6 months of age. Indeed, detection of hearing loss and early intervention allow a better access to the language and consequently an easier schooling and social integration. This article shows the results of the screening from february at the end of December 2002. These data are compared with those of the literature.

  6. CUATENEO Network: preliminary results after first reobservation

    NASA Astrophysics Data System (ADS)

    Garate, J.; Martin Davila, J.; Suriñach, E.; Berrocoso, M.; Perez Peña, A.; Talaya, J.

    2003-04-01

    Cuateneo GPS network was established in 1997 as a result of a collaboration between different specialists in Earth Sciences from the University of Barcelona and the Institute Cartographic of Catalonia. It was set up in the South Eastern part of the Iberian Peninsula, at the Eastern Betics. Such area is interesting from a tectonic point of view despite its activity drives to moderate deformation rates, but the values of this rates are locally high. So the network was designed to control the most active fractures of the area bearing in mind the historical and recent seismic information and the deformation of recent sediments. A first GPS episodic campaign was performed in April 1997, and a second one has been made in September-October 2002. This one has been done as a collaboration between the San Fernando Observatory and the University of Barcelona, with the support of students from the University of Cadiz. The goal of this presentation is to show how the work has been carried out, and the results we got from the observation, although of course, more campaigns should be made in order to get a complete picture of the tectonic behaviour of the area.

  7. Modelling Extortion Racket Systems: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Nardin, Luis G.; Andrighetto, Giulia; Székely, Áron; Conte, Rosaria

    Mafias are highly powerful and deeply entrenched organised criminal groups that cause both economic and social damage. Overcoming, or at least limiting, their harmful effects is a societally beneficial objective, which renders its dynamics understanding an objective of both scientific and political interests. We propose an agent-based simulation model aimed at understanding how independent and combined effects of legal and social norm-based processes help to counter mafias. Our results show that legal processes are effective in directly countering mafias by reducing their activities and changing the behaviour of the rest of population, yet they are not able to change people's mind-set that renders the change fragile. When combined with social norm-based processes, however, people's mind-set shifts towards a culture of legality rendering the observed behaviour resilient to change.

  8. Emetophobia: preliminary results of an internet survey.

    PubMed

    Lipsitz, J D; Fyer, A J; Paterniti, A; Klein, D F

    2001-01-01

    Through electronic mail, we surveyed members of an internet support group for emetophobia (fear of vomiting). Respondents were 50 women and 6 men with a mean age of 31 years. Results suggest that, for this sample, emetophobia is a disorder of early onset and chronic course, with highly persistent and intrusive symptoms. Emetophobia is implicated in social, home-marital, and occupational impairment and it causes significant constriction of leisure activities. Nearly half of women avoided or delayed becoming pregnant. About three quarters of respondents have eating rituals or significantly limit the foods they eat. Respondents describe other problems such as depression, panic attacks, social anxiety, compulsions, and frequent history of childhood separation anxiety. Copyright 2001 Wiley-Liss, Inc.

  9. Laser treatment of stretch marks: preliminary results

    NASA Astrophysics Data System (ADS)

    Longo, Leonardo; Piccinetti, A. L.; Monache, G. D.; Botta, G.; Mancini, S.

    2000-06-01

    The best treatment of these stretch mark is still unknown. Some authors proposed the treatment with flash-lamp-pumped dye laser 585 nm, with fluence over 8 J/cm2. Reviewing our experiences on no-surgical effects of lasers in the various phases of the wound healing, including the re- epithelization, we would like to apply the no-surgical laser therapy treating the stretch marks of breast, abdomen and lumbo-sacral region. The goal is to inhibit the fibrous tissue metabolism, encouraging the destruction of the collagen fibers with inflammatory mechanism, and increasing the reconstitution of the superficial dermis layers. We treated five cases of stretch marks in women 22-35 years old, since May 1999, with a cycle of applications of double lasers, 511 and 577 nm, with energy of 20 Joule for spot, respecting the maximum thermal relaxation times of the skin. We waited two weeks interval between the applications. Results obtained after five applications are very positive, and we are encouraged to continue this experimentation.

  10. ALMA band 2 optics: Preliminary results

    NASA Astrophysics Data System (ADS)

    Srikanth, Sivasankaran; Gonzalez, Alvaro

    2015-05-01

    The National Radio Astronomy Observatory is currently developing the ALMA Band 2 cartridge, to be completed by mid-2016. The receiver will cover the 67-90 GHz band, with dual linear polarization. An orthomode transducer (OMT) based on turnstile junction has been developed and measured. The measured input return loss is better than 20dB. The optics comprises of a linear taper corrugated horn and a bi-hyperbolic lens that matches the waist of the horn to that of the telescope. The lens mounts on the 300K plate and serves as the vacuum barrier for the cryostat. The window for band 2 is offset from the center of the cryostat by 255mm, which results in a feed/ lens tilt of 2.48° to the cryostat axis. The feed is cooled to 15K, while the lens is at 300K. The minimum distance between the lens and the feed aperture is 83 mm and the maximum size of the lens is 92mm.

  11. Ultrasonic vibration dectection with wavelets: preliminary results.

    PubMed

    Plett, Melani; Beach, Kirk W

    2005-03-01

    Several arterial disorders are known to cause systolic audio vibrations in tissue: they include stenoses, vasospasm, aneurysms, bleeds and arteriovenous fistulas. High-amplitude vibrations can be discovered with conventional Doppler ultrasound (US) instruments; however, differentiating brief, low-amplitude vibrations from other nonstationary echo sources is difficult. Further, characterizing the frequency and amplitude of vibrations is not feasible with conventional Doppler US. The automated detection and estimation of both the frequency and amplitude of vibrations with durations less than 100 ms and amplitudes of a micrometer or less have remained a signal-processing challenge. These vibrations may be associated with both nonstationary colored noise and strong low-frequency clutter. The normalized continuous Morlet wavelet power-spectrum analysis of quadrature Doppler echoes, followed by a binary hypothesis test for noise, results in simulated detection rates above 99.9%, with 0.1% false alarms for signal-on signal-to-noise ratios (SNRs) as low as one. Two clinical examples are included.

  12. Preliminary Results of Solid Gas Generator Micropropulsion

    NASA Technical Reports Server (NTRS)

    deGroot, Wilhelmus A.; Reed, Brian D.; Brenizer, Marshall

    1999-01-01

    A decomposing solid thruster concept, which creates a more benign thermal and chemical environment than solid propellant combustion, while maintaining, performance similar to solid combustion, is described. A Micro-Electro-Mechanical (MEMS) thruster concept with diode laser and fiber-optic initiation is proposed, and thruster components fabricated with MEMS technology are presented. A high nitrogen content solid gas generator compound is evaluated and tested in a conventional axisymmetric thrust chamber with nozzle throat area ratio of 100. Results show incomplete decomposition of this compound in both low pressure (1 kPa) and high pressure (1 MPa) environments, with decomposition of up to 80% of the original mass. Chamber pressures of 1.1 MPa were obtained, with maximum calculated thrust of approximately 2.7 N. Resistively heated wires and resistively heated walls were used to initiate decomposition. Initiation tests using available lasers were unsuccessful, but infrared spectra of the compound show that the laser initiation tests used inappropriate wavelengths for optimal propellant absorption. Optimal wavelengths for laser ignition were identified. Data presented are from tests currently in progress. Alternative solid gas generator compounds are being evaluated for future tests.

  13. HST observations of Chiron: preliminary results

    NASA Astrophysics Data System (ADS)

    BENEDETTI Rossi, Gustavo; Sicardy, Bruno; Buie, Marc W.; Braga-Ribas, Felipe; Ortiz, Jose-Luis; Duffard, Rene; camargo, julio; Vieira-Martins, Roberto; Gratadour, Damien; Dumas, Christophe

    2016-10-01

    Chiron is a Centaur object, with a radius of approximately 110km. It is orbiting between Saturn and Uranus, and may be a Transneptunian Object (TNO) that has been recently (less than 10 My) scattered by gravitational perturbations from Uranus, just like its "twin brother" Chariklo. On June 3rd, 2013, a stellar occultation by Chariklo of a R=12.4 magnitude star was observed from seven sites in South America, which led to the detection of a total of twelve secondary events, revealing the presence of two narrow and dense rings (see more details at Braga-Ribas F. et al., Nature, 2014).Up to now, planetary rings have been detected exclusively around the four giant planets of our Solar System and Chariklo. In spite of hundreds of occultations by asteroids and several space missions, no other small bodies have shown the presence of rings. However, two recent papers (Ruprecht et al. 2015 and Ortiz et. al 2015) report secondary events from stellar occultations by Chiron that have been interpreted either as a dust shell or a ring system. Using the Hubble Space Telescope we obtained direct images of Chiron surroundings to search for rings, jets and/or small satellites. First results will be presented.

  14. Computerized Script Training for Aphasia: Preliminary Results

    PubMed Central

    Cherney, Leora R.; Halper, Anita S.; Holland, Audrey L.; Cole, Ron

    2009-01-01

    Purpose This article describes computer software that was developed specifically for training conversational scripts and illustrates its use with three individuals with aphasia. Methods Three participants with chronic aphasia (Broca’s, Wernicke’s and anomic) were assessed before and after nine weeks of a computer script training program. For each participant, three individualized scripts were developed, recorded on the software, and practiced sequentially at home. Weekly meetings with the speech-language pathologist occurred to monitor practice and assess progress. Baseline and post-treatment scripts were audio-taped, transcribed, and compared to the target scripts for content, grammatical productivity and rate of production of script-related words. Interviews with the person with aphasia and their significant other were conducted at the conclusion of treatment. Results All measures (content, grammatical productivity and rate of production of script-related words) improved for each participant on every script. Two participants gained more than five points on the Aphasia Quotient of the Western Aphasia Battery. Five positive themes were consistently identified from the exit interviews - increased verbal communication, improvements in other modalities and situations, communication changes noticed by others, increased confidence, and satisfaction with the software. Conclusion Computer-based script training potentially may be an effective intervention for persons with chronic aphasia. PMID:18230811

  15. Bacteremia following dental implant surgery: Preliminary results

    PubMed Central

    Özdemir, Tayfun; Öksüz, Lütfiye; Gürler, Nezahat

    2012-01-01

    Objectives: The aims of this study were to investigate the incidence of bacteremia, bacteriology and antibiotic susceptibility against to causative bacteria associated with dental implant installation. Study Design: 30 generally healthy patients were enrolled in this study. Blood samples were collected at baseline and at 30 minutes after dental implant installation and 24 hours after dental implant surgery. Blood samples were cultured in a BACTEC system. The isolated bacteria were identified using conventional methods. Antimicrobial sensitivity tests were performed by disc diffusion. Results: No bacteria were isolated at the baseline and 24 hours after surgery, whereas the prevalence of bacteremia at 30 minutes after dental implant installation was 23%. The isolated bacteria species were Staphylococcus epidermidis, Eubacterium spp., Corynebacterium spp. and Streptococcus viridans. The Staphylococcus epidermidis, which was isolated in three patients, was found to be resistant to penicillin which is first choice of many clinicians. Conclusion: Our findings suggest that installation of dental implants can produce bacteremia. Within the limitations of this study, it can be speculated that the resistance of antibiotics may compromise the routine prophylaxis against infective endocarditis. Therefore use of blood cultures and antibiograms may be suggested in risky patients. The outcome of the present study should be verified using a larger patient group with varying conditions. Key words: Dental implant, bacteremia, infective endocarditis, antibiotic prophylaxis. PMID:22157668

  16. MR elastography of breast cancer: preliminary results.

    PubMed

    McKnight, Alexia L; Kugel, Jennifer L; Rossman, Phillip J; Manduca, Armando; Hartmann, Lynn C; Ehman, Richard L

    2002-06-01

    Motivated by the long-recognized value of palpation in detecting breast cancer, we tested the feasibility of a technique for quantitatively evaluating the mechanical properties of breast tissues on the basis of direct MR imaging visualization of acoustic waves. The prototypic elasticity imaging technique consists of a device for generating acoustic shear waves in tissue, an MR imaging-based method for imaging the propagation of these waves, and an algorithm for processing the wave images to generate quantitative images depicting tissue stiffness. After tests with tissue-simulating phantom materials and breast cancer specimens, we used the prototypic breast MR elastography technique to image six healthy women and six patients with known breast cancer. Acoustic shear waves were clearly visualized in phantoms, breast cancer specimens, healthy volunteers, and patients with breast cancer. The elastograms of the tumor specimens showed focal areas of high shear stiffness. MR elastograms of healthy volunteers revealed moderately heterogeneous mechanical properties, with the shear stiffness of fibroglandular tissue measuring slightly higher than that of adipose tissue. The elastograms of patients with breast cancer showed focal areas of high shear stiffness corresponding to the locations of the known tumors. The mean shear stiffness of breast carcinoma was 418% higher than the mean value of surrounding breast tissues. The results confirm the hypothesis that the prototypic breast MR elastographic technique can quantitatively depict the elastic properties of breast tissues in vivo and reveal high shear elasticity in known breast tumors. Further research is needed to evaluate the potential applications of MR elastography, such as detecting breast carcinoma and characterizing suspicious breast lesions.

  17. Bahamas Optical Turbulence Exercise (BOTEX): preliminary results

    NASA Astrophysics Data System (ADS)

    Hou, Weilin; Jorosz, Ewa; Dalgleish, Fraser; Nootz, Gero; Woods, Sarah; Weidemann, Alan D.; Goode, Wesley; Vuorenkoski, Anni; Metzger, B.; Ramos, B.

    2012-06-01

    patterns are examined, using high speed camera recordings (300 to 1200 fps), in association with measured turbulence structures. Initial results confirmed our hypothesis that turbulence impacted optical transmissions. They also showed that more research will be needed to better quantify and mitigate such effects, especially for the U.S. Navy's next generation EO systems, including active imaging, lidar and optical communications.

  18. Preliminary Results of Bisphosphonate ISS Flight Experiment

    NASA Technical Reports Server (NTRS)

    LeBlanc, Adrian; Jones, Jeff; Shapiro, Jay; Lang, Tom; Shackelford, Linda C.; Smith, Scott M.; Evans, Harlan J.; Spector, Elisabeth R.; Sibonga, Jean; Matsumoti, Toshio; Nakamura, Toshitaka; Kohri, Kenjiro; Ohshima, Hiroshi

    2010-01-01

    Bone loss has been recognized as a potential problem from the beginning of human spaceflight. With the spaceflight missions lasting 6 months to potentially 3 years or longer this issue has assumed increased significance. Detailed measurements from the Mir and ISS long duration missions have documented losses in bone mineral density (BMD) from the total skeleton and critical sub-regions. The most important losses are from the femoral hip averaging about -1.6%/mo integral to -2.3%/mo trabecular BMD. Importantly these studies have documented the wide range in individual response from -0.5 to -5%/mo in BMD. Given the small size of any expedition crew, the wide range of responses has to be considered in the implementation of any countermeasure. Assuming that it is unlikely that the susceptibility for bone loss in any given crewmember will be known, a suite of bone loss countermeasures will likely be needed to insure protection of all crewmembers. The hypothesis for this experiment is that the combined effect of anti-resorptive drugs plus the standard in-flight exercise regimen will have a measurable effect on preventing space flight induced bone loss and strength and will reduce renal stone risk. To date, 4 crewmembers have completed the flight portion of the protocol in which crewmembers take a 70-mg alendronate tablet once a week before and during flight, starting 17 days before launch. Compared to previous ISS crewmembers (n=14) not taking alendronate, DXA measurements of the total hip BMD were significantly changed from -1.1 0.5%/mo to 0.04 0.3%/mo (p<0.01); QCT-determined trabecular BMD of the total hip was significantly changed from -2.3 1.0%/mo to -0.3 1.6%/mo (p<0.01). Significance was calculated from a one-tailed t test. While these results are encouraging, the current n (4) is small, and the large SDs indicate that while the means are improved there is still high variability in individual response. Four additional crewmembers have been recruited to participate

  19. Preliminary results for salt aerosol production intended for marine cloud brightening, using effervescent spray atomization.

    PubMed

    Cooper, Gary; Foster, Jack; Galbraith, Lee; Jain, Sudhanshu; Neukermans, Armand; Ormond, Bob

    2014-12-28

    The large-scale production of vast numbers of suitable salt nuclei and their upward launch is one of the main technological barriers to the experimental testing of marine cloud brightening (MCB). Very promising, though not definitive, results have been obtained using an adapted version of effervescent spray atomization. The process is simple, robust and inexpensive. This form of effervescent spraying uses only pressurized water and air sprayed from small nozzles to obtain very fine distributions. While it is far from optimized, and may not be the best method if full deployment is ever desired, we believe that even in its present form the process would lend itself well to preliminary field test investigations of MCB. Measurements obtained using standard aerosol instrumentation show approximately lognormal distributions of salt nuclei with median diameters of approximately 65 nm and geometric standard deviations slightly less than 2. However, these measurements are not in agreement with those based on scanning electron microscopy imaging of collected particles, an observation that has not yet been explained. Assuming the above distribution, 10(15) particles per second could be made with 21 kW of spray power, using approximately 200 nozzles. It is envisioned that existing snow making equipment can be adapted to launch the nuclei 60-100 m into the air, requiring approximately 20 kW of additional power.

  20. Preliminary results for salt aerosol production intended for marine cloud brightening, using effervescent spray atomization

    PubMed Central

    Cooper, Gary; Foster, Jack; Galbraith, Lee; Jain, Sudhanshu; Neukermans, Armand; Ormond, Bob

    2014-01-01

    The large-scale production of vast numbers of suitable salt nuclei and their upward launch is one of the main technological barriers to the experimental testing of marine cloud brightening (MCB). Very promising, though not definitive, results have been obtained using an adapted version of effervescent spray atomization. The process is simple, robust and inexpensive. This form of effervescent spraying uses only pressurized water and air sprayed from small nozzles to obtain very fine distributions. While it is far from optimized, and may not be the best method if full deployment is ever desired, we believe that even in its present form the process would lend itself well to preliminary field test investigations of MCB. Measurements obtained using standard aerosol instrumentation show approximately lognormal distributions of salt nuclei with median diameters of approximately 65 nm and geometric standard deviations slightly less than 2. However, these measurements are not in agreement with those based on scanning electron microscopy imaging of collected particles, an observation that has not yet been explained. Assuming the above distribution, 1015 particles per second could be made with 21 kW of spray power, using approximately 200 nozzles. It is envisioned that existing snow making equipment can be adapted to launch the nuclei 60–100 m into the air, requiring approximately 20 kW of additional power. PMID:25404673

  1. [Results of measuring the charge and energy spectra of heavy nuclei on board the artificial Earth satellite Kosmos-936].

    PubMed

    Dashin, S A; Marennyĭ, A M; Gertsen, G P

    1982-01-01

    The measurements were performed using a package of dielectric track detectors mounted behind the shield of 60-80 kg.m-2 thick. The charge of nuclei was determined from the complete track length. As a result, 1915 tracks of nuclei with Z greater than or equal to 6 in the energy range 100-450 MeV/nuclon were detected and identified. The differential charge spectrum of nuclei with 6 less than or equal to Z less than or equal to 28 and the energy spectrum of nuclei of the iron group were built. For iron nuclei the following ration of isotope groups was obtained: (Fe52 + Fe53 + Fe54): (Fe55 + Fe56 + Fe57) : (Fe58 + Fe59 + Fe60) = (0.30 +/- 0.08) = (0.49 +/- 0.10) : (0.21 +/- 0.05).

  2. Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Preliminary Evaluation Results

    SciTech Connect

    Chandler, K.; Eudy, L.

    2008-10-01

    This report provides preliminary results from a National Renewable Energy Laboratory evaluation of a protoptye fuel cell transit bus operating at Connecticut Transit in Hartford. Included are descriptions of the planned fuel cell bus demonstration and equipment; early results and agency experience are also provided.

  3. Automatic segmentation of cell nuclei in Feulgen-stained histological sections of prostate cancer and quantitative evaluation of segmentation results.

    PubMed

    Nielsen, Birgitte; Albregtsen, Fritz; Danielsen, Håvard E

    2012-07-01

    Digital image analysis of cell nuclei is useful to obtain quantitative information for the diagnosis and prognosis of cancer. However, the lack of a reliable automatic nuclear segmentation is a limiting factor for high-throughput nuclear image analysis. We have developed a method for automatic segmentation of nuclei in Feulgen-stained histological sections of prostate cancer. A local adaptive thresholding with an object perimeter gradient verification step detected the nuclei and was combined with an active contour model that featured an optimized initialization and worked within a restricted region to improve convergence of the segmentation of each nucleus. The method was tested on 30 randomly selected image frames from three cases, comparing the results from the automatic algorithm to a manual delineation of 924 nuclei. The automatic method segmented a few more nuclei compared to the manual method, and about 73% of the manually segmented nuclei were also segmented by the automatic method. For each nucleus segmented both manually and automatically, the accuracy (i.e., agreement with manual delineation) was estimated. The mean segmentation sensitivity/specificity were 95%/96%. The results from the automatic method were not significantly different from the ground truth provided by manual segmentation. This opens the possibility for large-scale nuclear analysis based on automatic segmentation of nuclei in Feulgen-stained histological sections. Copyright © 2012 International Society for Advancement of Cytometry.

  4. Hydrogen-burn survival: preliminary thermal model and test results

    SciTech Connect

    McCulloch, W.H.; Ratzel, A.C.; Kempka, S.N.; Furgal, D.T.; Aragon, J.J.

    1982-08-01

    This report documents preliminary Hydrogen Burn Survival (HBS) Program experimental and analytical work conducted through February 1982. The effects of hydrogen deflagrations on safety-related equipment in nuclear power plant containment buildings are considered. Preliminary results from hydrogen deflagration experiments in the Sandia Variable Geometry Experimental System (VGES) are presented and analytical predictions for these tests are compared and discussed. Analytical estimates of component thermal responses to hydrogen deflagrations in the upper and lower compartments of an ice condenser, pressurized water reactor are also presented.

  5. The 2dF Galaxy Redshift Survey: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Maddox, Steve; 2DF Galaxy Redshift Survey Team; Bland-Hawthorn, Joss; Cannon, Russell; Cole, Shaun; Colless, Matthew; Collins, Chris; Couch, Warrick; Dalton, Gavin; Driver, Simon; Ellis, Richard; Efstathiou, George; Folkes, Simon; Frenk, Carlos; Glazebrook, Karl; Kaiser, Nick; Lahav, Ofer; Lumsden, Stuart; Peterson, Bruce; Peacock, John; Sutherland, Will; Taylor, Keith

    Spectroscopic observations for a new survey of 250 000 galaxy redshifts are underway, using the 2dF instrument at the AAT. The input galaxy catalogue and commissioning data are described. The first result from the preliminary data is a new estimate of the galaxy luminosity function at = 0.1.

  6. RELATIVE COMPOSITION AND ENERGY SPECTRA OF LIGHT NUCLEI IN COSMIC RAYS: RESULTS FROM AMS-01

    SciTech Connect

    Aguilar, M.; Alcaraz, J.; Berdugo, J.; Allaby, J.; Alpat, B.; Ambrosi, G.; Azzarello, P.; Battiston, R.; Anderhub, H.; Ao, L.; Arefiev, A.; Arruda, L.; Barao, F.; Barreira, G.; Basile, M.; Bellagamba, L.; Bartoloni, A.; Becker, R.; Becker, U.; Bene, P.

    2010-11-20

    Measurement of the chemical and isotopic composition of cosmic rays is essential for the precise understanding of their propagation in the galaxy. While the model parameters are mainly determined using the B/C ratio, the study of extended sets of ratios can provide stronger constraints on the propagation models. In this paper, the relative abundances of light-nuclei lithium, beryllium, boron, and carbon are presented. The secondary-to-primary ratios Li/C, Be/C, and B/C have been measured in the kinetic energy range 0.35-45 GeV nucleon{sup -1}. The isotopic ratio {sup 7}Li/{sup 6}Li is also determined in the magnetic rigidity interval 2.5-6.3 GV. The secondary-to-secondary ratios Li/Be, Li/B, and Be/B are also reported. These measurements are based on the data collected by the Alpha Magnetic Spectrometer AMS-01 during the STS-91 space shuttle flight in 1998 June. Our experimental results are in substantial agreement with other measurements, where they exist. We describe our light-nuclei data with a diffusive-reacceleration model. A 10%-15% overproduction of Be is found in the model predictions and can be attributed to uncertainties in the production cross-section data.

  7. Relative Composition and Energy Spectra of Light Nuclei in Cosmic Rays: Results from AMS-01

    NASA Astrophysics Data System (ADS)

    Aguilar, M.; Alcaraz, J.; Allaby, J.; Alpat, B.; Ambrosi, G.; Anderhub, H.; Ao, L.; Arefiev, A.; Arruda, L.; Azzarello, P.; Basile, M.; Barao, F.; Barreira, G.; Bartoloni, A.; Battiston, R.; Becker, R.; Becker, U.; Bellagamba, L.; Béné, P.; Berdugo, J.; Berges, P.; Bertucci, B.; Biland, A.; Bindi, V.; Boella, G.; Boschini, M.; Bourquin, M.; Bruni, G.; Buénerd, M.; Burger, J. D.; Burger, W. J.; Cai, X. D.; Cannarsa, P.; Capell, M.; Casadei, D.; Casaus, J.; Castellini, G.; Cernuda, I.; Chang, Y. H.; Chen, H. F.; Chen, H. S.; Chen, Z. G.; Chernoplekov, N. A.; Chiueh, T. H.; Choi, Y. Y.; Cindolo, F.; Commichau, V.; Contin, A.; Cortina-Gil, E.; Crespo, D.; Cristinziani, M.; Dai, T. S.; dela Guia, C.; Delgado, C.; Di Falco, S.; Djambazov, L.; D'Antone, I.; Dong, Z. R.; Duranti, M.; Engelberg, J.; Eppling, F. J.; Eronen, T.; Extermann, P.; Favier, J.; Fiandrini, E.; Fisher, P. H.; Flügge, G.; Fouque, N.; Galaktionov, Y.; Gervasi, M.; Giovacchini, F.; Giusti, P.; Grandi, D.; Grimm, O.; Gu, W. Q.; Haino, S.; Hangarter, K.; Hasan, A.; Hermel, V.; Hofer, H.; Hungerford, W.; Ionica, M.; Jongmanns, M.; Karlamaa, K.; Karpinski, W.; Kenney, G.; Kim, D. H.; Kim, G. N.; Kim, K. S.; Kirn, T.; Klimentov, A.; Kossakowski, R.; Kounine, A.; Koutsenko, V.; Kraeber, M.; Laborie, G.; Laitinen, T.; Lamanna, G.; Laurenti, G.; Lebedev, A.; Lechanoine-Leluc, C.; Lee, M. W.; Lee, S. C.; Levi, G.; Lin, C. H.; Liu, H. T.; Lu, G.; Lu, Y. S.; Lübelsmeyer, K.; Luckey, D.; Lustermann, W.; Maña, C.; Margotti, A.; Mayet, F.; McNeil, R. R.; Menichelli, M.; Mihul, A.; Mujunen, A.; Oliva, A.; Palmonari, F.; Park, H. B.; Park, W. H.; Pauluzzi, M.; Pauss, F.; Pereira, R.; Perrin, E.; Pevsner, A.; Pilo, F.; Pimenta, M.; Plyaskin, V.; Pojidaev, V.; Pohl, M.; Produit, N.; Quadrani, L.; Rancoita, P. G.; Rapin, D.; Ren, D.; Ren, Z.; Ribordy, M.; Richeux, J. P.; Riihonen, E.; Ritakari, J.; Ro, S.; Roeser, U.; Sagdeev, R.; Santos, D.; Sartorelli, G.; Sbarra, C.; Schael, S.; Schultz von Dratzig, A.; Schwering, G.; Seo, E. S.; Shin, J. W.; Shoumilov, E.; Shoutko, V.; Siedenburg, T.; Siedling, R.; Son, D.; Song, T.; Spada, F. R.; Spinella, F.; Steuer, M.; Sun, G. S.; Suter, H.; Tang, X. W.; Ting, Samuel C. C.; Ting, S. M.; Tomassetti, N.; Tornikoski, M.; Torsti, J.; Trümper, J.; Ulbricht, J.; Urpo, S.; Valtonen, E.; Vandenhirtz, J.; Velikhov, E.; Verlaat, B.; Vetlitsky, I.; Vezzu, F.; Vialle, J. P.; Viertel, G.; Vité, D.; Von Gunten, H.; Waldmeier Wicki, S.; Wallraff, W.; Wang, J. Z.; Wiik, K.; Williams, C.; Wu, S. X.; Xia, P. C.; Xu, S.; Xu, Z. Z.; Yan, J. L.; Yan, L. G.; Yang, C. G.; Yang, J.; Yang, M.; Ye, S. W.; Zhang, H. Y.; Zhang, Z. P.; Zhao, D. X.; Zhou, F.; Zhou, Y.; Zhu, G. Y.; Zhu, W. Z.; Zhuang, H. L.; Zichichi, A.; Zimmermann, B.; Zuccon, P.

    2010-11-01

    Measurement of the chemical and isotopic composition of cosmic rays is essential for the precise understanding of their propagation in the galaxy. While the model parameters are mainly determined using the B/C ratio, the study of extended sets of ratios can provide stronger constraints on the propagation models. In this paper, the relative abundances of light-nuclei lithium, beryllium, boron, and carbon are presented. The secondary-to-primary ratios Li/C, Be/C, and B/C have been measured in the kinetic energy range 0.35-45 GeV nucleon-1. The isotopic ratio 7Li/6Li is also determined in the magnetic rigidity interval 2.5-6.3 GV. The secondary-to-secondary ratios Li/Be, Li/B, and Be/B are also reported. These measurements are based on the data collected by the Alpha Magnetic Spectrometer AMS-01 during the STS-91 space shuttle flight in 1998 June. Our experimental results are in substantial agreement with other measurements, where they exist. We describe our light-nuclei data with a diffusive-reacceleration model. A 10%-15% overproduction of Be is found in the model predictions and can be attributed to uncertainties in the production cross-section data.

  8. Experimental results on multi-nucleonic K- absorptions in light nuclei

    NASA Astrophysics Data System (ADS)

    Vázquez Doce, O.; Cargnelli, M.; Curceanu, C.; Del Grande, R.; Fabbietti, L.; Marton, J.; Piscicchia, K.; Scordo, A.; Sirghi, D.; Tucakovic, I.; Wycech, S.; Zmeskal, J.; Anastasi, A.; Curciarello, F.; Czerwinski, E.; Krzemien, W.; Mandaglio, G.; Martini, M.; Moskal, P.; Patera, V.; Perez del Rio, E.; Silarski, M.

    2017-03-01

    The AMADEUS collaboration studied the K- absorptions at low momentum in light nuclei leading to Σ0p final state. Those events were recorded by the KLOE detector, used as an active target, installed in the the DAΦNE collider. The results show that it is possible to isolate the process where the K- is absorbed by two nucleons and the decay products are emitted without any further final state interactions among other contributions involving more than two nucleons. Further, the possible contribution of a ppK- bound state was investigated. The best fit gives space to a yield of ppK-/Kstop- = (0.044 ± 0.009 stat-0.005+0.004) × 10-2 corresponding to a binding energy and a width of 45 and 30 MeV/c2, respectively. A statistical analysis of this result shows although that its significance is only at the level of 1σ.

  9. Preliminary results toward injection locking of an incoherent laser array

    NASA Technical Reports Server (NTRS)

    Daher, J.

    1986-01-01

    The preliminary results of phase locking an incoherent laser array to a master source in an attempt to achieve coherent operation are presented. The techniques necessary to demonstrate phase locking are described along with some topics for future consideration. As expected, the results obtained suggest that injection locking of an array, where the spacing between adjacent longitudinal modes of its elements is significantly larger than the locking bandwidth, may not be feasible.

  10. Hellenic Amateur Astronomy Association's activities: Preliminary results on Perseids 2010

    NASA Astrophysics Data System (ADS)

    Maravelias, G.

    2011-01-01

    Preliminary results on the Perseids 2010 are presented. Visual and video observations were obtained by the author and a first reduction of the visual data shows that a maximum of ZHR ~120 was reached during the night 12-13 of August 2010. Moreover, a video setup was tested (DMK camera and UFO Capture v2) and the results show that, under some limitations, valuable data can be obtained.

  11. Preliminary Results from the ESO Slice Project (ESP)

    NASA Astrophysics Data System (ADS)

    Vettolani, G.; Zucca, E.; Cappi, A.; Merighi, R.; Mignoli, M.; Stirpe, G.; Zamorani, G.; MacGillivray, H.; Collins, C.; Balkowski, C.; Alimi, J.; Blanchard, A.; Cayatte, V.; Felenbock, P.; Maurogordato, S.; Proust, D.; Chincarini, G.; Guzzo, L.; Maccagni, D.; Scaramella, R.; Ramella, M.

    We present the first results of a galaxy redshift survey, ESO Slice Project (ESP), we are accomplishing as an ESO Key-Project over about 30 square degrees in a region near the South Galactic Pole. The limiting magnitude is b_J = 19.4. Observations have been almost completed and about 90% of the data obtained so far has been reduced providing about 3000 galaxy redshifts. We present some preliminary results concerning the large scale galaxy distribution and their luminosity function.

  12. Iron in hereditary retinal degeneration: PIXE microanalysis. Preliminary results

    NASA Astrophysics Data System (ADS)

    Sergeant, C.; Gouget, B.; Llabador, Y.; Simonoff, M.; Yefimova, M.; Courtois, Y.; Jeanny, J. C.

    1999-10-01

    Several types of hereditary retinal degeneration with progressive alteration of photoreceptors exist in men and animals. Recent immunohistochemical results have shown strong degradation of transferrin, the protein responsible for iron transport, in retinas of rats with hereditary retinal degeneration. Freeze-dried thin sections of rat retinas from different stages of the disease, and respective coeval control sections, have been analyzed using nuclear microprobe. In this first part of the study, the rat retinas at post-natal stages of 35 and 45 days have been analyzed. The sample preparation and the post-irradiation staining to determine precisely the retinal layers involved are described. Preliminary results of element distributions (K, Ca, Fe) in the rat retina layers are discussed. A very high content of calcium in the choriocapillaris of dystrophic rat retinas was observed. Preliminary results on iron distribution in the rat retina layers are presented.

  13. Preliminary Results on the Experimental Investigation of the Structure Functions of Bound Nucleons

    SciTech Connect

    Bodek, Arie

    2015-09-01

    We present preliminary results on an experimental study of the nuclear modification of the longitudinal (σL) and transverse (σT) structure functions of nucleons bound in nuclear targets. The origin of these modifications (commonly referred as as the EMC effect) is not fully understood. Our measurements of R= σLT for nuclei (RA) and for deuterium (RD) indicate that nuclear modifications of the structure functions of bound nucleons are different for the longitudinal and transverse structure functions, and that contrary to expectation from several theoretical models, RA < RD.

  14. Preliminary Results of the MOSES II 2015 Flight

    NASA Astrophysics Data System (ADS)

    Smart, Roy; Courrier, Hans; Kankelborg, Charles

    2016-05-01

    The Multi-Order Extreme Ultraviolet Spectrograph (MOSES) is a slitless spectrograph which aims to produce simultaneous spatial-spectral imaging of the solar transition region. This is accomplished through a multilayer concave diffraction grating which produces three images for the spectral orders m = 0, ± 1. The multilayer coating provides a narrow passband, dominated by Ne VII (46.5 nm), which allows the three images to be compared in order to determine line broadenings and identify explosive events in the Solar Transition Region. Here, we examine the preliminary results of MOSES II, the instrument’s second flight which was launched on a sounding rocket from White Sands Missile Range, NM in August 2015. We present the first images of the Sun in Ne VII since Skylab and the preliminary results of observed doppler shifts within an active region.

  15. Preliminary results of the echo-seeding experiment at SLAC

    SciTech Connect

    Xiang, D.; Colby, E.; Ding, Y.; Dunning, M.; Frederico, J.; Gilevich, S.; Hast, C.; Jobe, K.; McCormick, D.; Nelson, J.; Raubenheimer, T.O.; Soong, K.; Stupakov, G.; Szalata, Z.; Walz, D.; Weathersby, S.; Woodley, M.; Corlett, J.; Qiang, J.; Penn, G.; Prestemon, S.; Schlueter, R.; Venturini, M.; Wan, W.; Pernet, P-L.

    2010-05-23

    ECHO-7 is a proof-of-principle echo-enabled harmonic generation FEL experiment in the Next Linear Collider Test Accelerator (NLCTA) at SLAC. The experiment aims to generate coherent radiation at 318 nm and 227 nm, which are the 5th and 7th harmonic of the infrared seed laser. In this paper we present the preliminary results from the commissioning run of the completed experimental setup which started in April 2010.

  16. Shoe-box orbit determination system for SMM preliminary results

    NASA Technical Reports Server (NTRS)

    Tasaki, K. K.; Goorevich, C.

    1979-01-01

    The implementation of both sequential and batch methods of estimation on IMP-16 microprocessors was investigated. Simulated data was used from a tracking and data relay satellite whose target satellite was the Solar Maximum Mission. An interesting feature of the hardware was the use of two interconnected IMP-16's. Some preliminary results from the study, as well as the difficulties and advantages in the use of microprocessors, are presented.

  17. 9.4T Human MRI: Preliminary Results

    PubMed Central

    Vaughan, Thomas; DelaBarre, Lance; Snyder, Carl; Tian, Jinfeng; Akgun, Can; Shrivastava, Devashish; Liu, Wanzahn; Olson, Chris; Adriany, Gregor; Strupp, John; Andersen, Peter; Gopinath, Anand; van de Moortele, Pierre-Francois; Garwood, Michael; Ugurbil, Kamil

    2014-01-01

    This work reports the preliminary results of the first human images at the new high-field benchmark of 9.4T. A 65-cm-diameter bore magnet was used together with an asymmetric 40-cm-diameter head gradient and shim set. A multichannel transmission line (transverse electromagnetic (TEM)) head coil was driven by a programmable parallel transceiver to control the relative phase and magnitude of each channel independently. These new RF field control methods facilitated compensation for RF artifacts attributed to destructive interference patterns, in order to achieve homogeneous 9.4T head images or localize anatomic targets. Prior to FDA investigational device exemptions (IDEs) and internal review board (IRB)-approved human studies, preliminary RF safety studies were performed on porcine models. These data are reported together with exit interview results from the first 44 human volunteers. Although several points for improvement are discussed, the preliminary results demonstrate the feasibility of safe and successful human imaging at 9.4T. PMID:17075852

  18. Preliminary results of SPIRAL-2 thermo mechanical neutron converter characteristics

    NASA Astrophysics Data System (ADS)

    Udup, E.; Acosta, G.; Bermúdez, J.; Sajo-Bohus, L.; Tecchio, L.

    2012-02-01

    A preliminary design of a neutron converter module (NCM) for SPIRAL 2 Project is presented, main characteristics are given. Neutrons, produced by bombarding a carbon converter with a 40 MeV deuteron beam, 5 mA current for power up to 200 kW, induce fission reactions in target. The neutron converter, a high speed rotating wheel, operates at the temperature range between 1650-1850 °C. Vacuum restrictions and material radiation degradation, as well as a continuous three month operation were considered into structural analysis employing the ANSYS software. Preliminary tests indicate that the assembly withstands operating conditions under a vacuum up to 10-4 mbar, temperature up to 350°C, lack of lubricant and a radiation dose rate around 105 Gy/h. The results of thermomechanical simulations, considering temperature gradients, deformation and equivalent stress are presented.

  19. Photofragmentation of lens nuclei using the Er: YAG laser: preliminary report of an in vitro study.

    PubMed

    Wetzel, W; Brinkmann, R; Koop, N; Schröer, F; Birngruber, R

    1996-09-01

    The energy of the erbium: YAG laser (2.940-nm wave-length) can be used for minimally traumatic photoablation due to its high absorption at the tissue water and its consequently low penetration depth. Laser sclerostomy ab externo, an application of this principle, has undergone advanced clinical investigation. Another potential application is photofragmentation of the lens for cataract extraction. A laboratory model Er: YAG laser (flashlamp-pumped. 200-microseconds pulse length, 5-Hz repetition frequency) was coupled to a short low-OH quartz fiber (400 microns in diameter). The laser energy was applied by direct contact of the fiber tip to human lenses with very dense cataract. The lenses rested in a small cuvette filled with an aqueous-humor-analogous fluid. The fragmentablation rate was evaluated in relation to the number of pulses and the pulse energy. A laser-triggered flash-photography unit was engaged to visualize the ablation dynamics. We found tissue-ablation rates to range from 4 to 19 micrograms/pulse, depending on the nucleus density and ulse energy. The maximal size of the removed fragments was always below 500 microns. During ablation, rapidly increasing and collapsing cavitation bubbles were photographed at the distal tip of the application fiber. The impact radius of these cavitation effects markedly exceeded the pure penetration depth of laser radiation at a 2.9-microns wavelength. A clinical application of the method should be possible as judged by the results obtained for tissue-ablation rate and fragment size. Cavitation-bubble dynamics seems to be responsible for the high fragmentation efficiency. Special application probes have to be developed to optimize ablation and to prevent inadvertent destruction of the posterior lens capsule by cavitation effects.

  20. Preliminary results on heavy flavor physics at SLD

    SciTech Connect

    Usher, T.

    1994-12-01

    The author reports on preliminary heavy flavor physics results from the SLD detector at the SLAC Linear Collider. Efficient tagging of b{bar b} events is achieved with an impact parameter technique that takes advantage of the small and stable interaction point of the SLC and all charged tracks in Z{sup 0} decays. This technique is applied to samples of Z{sup 0} events collected during the 1992 and 1993 physics runs. Preliminary measurements of the ratio R{sub b} = {Gamma}(Z{sup 0} {yields} b{bar b})/{Gamma}(Z{sup 0} {yields} hadrons) and the average B hadron lifetime <{tau}{sub B}> are reported. In a sample of 27K Z{sup 0} events, values of R{sub b} = 0.235 {+-} 0.006(stat.) {+-} 0.018(syst.) and <{tau}{sub B}> = 1.53 {+-} 0.006(stat.) {+-} 0.018(syst.) are obtained. In addition, the first measurement of the left-right asymmetry A{sub b} is reported. Using a sample of 38K Z{sup 0} events with a luminosity weighted electron polarization of 62%, the author obtains a preliminary value of A{sub b} = 0.94 {+-} 0.006(stat.) {+-} 0.018(syst.).

  1. Mechanics in human fibroblasts and progeria: Lamin A mutation E145K results in stiffening of nuclei.

    PubMed

    Apte, Ketaki; Stick, Reimer; Radmacher, Manfred

    2017-02-01

    The lamina is a filamentous meshwork beneath the inner nuclear membrane that confers mechanical stability to nuclei. The E145K mutation in lamin A causes Hutchinson-Gilford progeria syndrome (HGPS). It affects lamin filament assembly and induces profound changes in the nuclear architecture. Expression of wild-type and E145K lamin A in Xenopus oocytes followed by atomic force microscopy (AFM) probing of isolated oocyte nuclei has shown significant changes in the mechanical properties of the lamina. Nuclei of oocytes expressing E145K lamin A are stiffer than those expressing wild-type lamin A. Here we present mechanical measurements by AFM on dermal fibroblasts obtained from a 4-year-old progeria patient bearing the E145K lamin A mutation and compared it to fibroblasts obtained from 2 healthy donors of 10 and 61 years of age, respectively. The abnormal shape of nuclei expressing E145K lamin A was analyzed by fluorescence microscopy. Lamina thickness was measured using electron micrographs. Fluorescence microscopy showed alterations in the actin network of progeria cells. AFM probing of whole dermal fibroblasts did not demonstrate significant differences in the elastic moduli of nuclear and cytoplasmic cell regions. In contrast, AFM measurements of isolated nuclei showed that nuclei of progeria and old person's cells are significantly stiffer than those of the young person, indicating that the process of aging, be it natural or abnormal, increases nuclear stiffness. Our results corroborate AFM data obtained using Xenopus oocyte nuclei and prove that the presence of E145K lamin A abnormally increases nuclear stiffness.

  2. BPM 37093: Preliminary Results from XCOV 16 and XCOV 17

    NASA Astrophysics Data System (ADS)

    Kanaan, A.; Nitta-Kleinman, A.; Winget, D. E.; Kepler, S. O.; Montgomery, M.; WET Team

    BPM 37093 is a 1.1 M_sun\\ ZZ Ceti star. This star's temperature (~ 11 000 K) and high mass (~ 1.1 M_sun) imply that it should be crystallized throughout most of its core, the exact fraction depending on its core composition. BPM 37093 is the first object where the results of crystallization theory can be probed observationally. If the star is crystallized its pulsation spectrum should differ significantly from non-crystallized pulsating stars. In this paper we report our preliminary results from the analysis of WET data obtained in 1998 and 1999.

  3. Preliminary Results on Uncertainty Quantification for Pattern Analytics

    SciTech Connect

    Stracuzzi, David John; Brost, Randolph; Chen, Maximillian Gene; Malinas, Rebecca; Peterson, Matthew Gregor; Phillips, Cynthia A.; Robinson, David G.; Woodbridge, Diane

    2015-09-01

    This report summarizes preliminary research into uncertainty quantification for pattern ana- lytics within the context of the Pattern Analytics to Support High-Performance Exploitation and Reasoning (PANTHER) project. The primary focus of PANTHER was to make large quantities of remote sensing data searchable by analysts. The work described in this re- port adds nuance to both the initial data preparation steps and the search process. Search queries are transformed from does the specified pattern exist in the data? to how certain is the system that the returned results match the query? We show example results for both data processing and search, and discuss a number of possible improvements for each.

  4. Helium at White Dwarf Photospheric Conditions: Preliminary Laboratory Results

    NASA Astrophysics Data System (ADS)

    Schaeuble, M.; Falcon, R. E.; Gomez, T. A.; Winget, D. E.; Montgomery, M. H.; Bailey, J. E.

    2017-03-01

    We present preliminary results of an experimental study exploring helium at photospheric conditions of white dwarf stars. These data were collected at Sandia National Laboratories' Z-machine, the largest x-ray source on earth. Our helium results could have many applications ranging from validating current DB white dwarf model atmospheres to providing accurate He pressure shifts at varying temperatures and densities. In a much broader context, these helium data can be used to guide theoretical developments in new continuum-lowering models for two-electron atoms. We also discuss future applications of our updated experimental design, which enables us to sample a greater range of densities, temperatures, and gas compositions.

  5. DETERMINING INCLINATIONS OF ACTIVE GALACTIC NUCLEI VIA THEIR NARROW-LINE REGION KINEMATICS. I. OBSERVATIONAL RESULTS

    SciTech Connect

    Fischer, T. C.; Crenshaw, D. M.; Kraemer, S. B.; Schmitt, H. R.

    2013-11-01

    Active galactic nuclei (AGNs) are axisymmetric systems to first order; their observed properties are likely strong functions of inclination with respect to our line of sight (LOS). However, except for a few special cases, the specific inclinations of individual AGNs are unknown. We have developed a promising technique for determining the inclinations of nearby AGNs by mapping the kinematics of their narrow-line regions (NLRs), which are often easily resolved with Hubble Space Telescope [O III] imaging and long-slit spectra from the Space Telescope Imaging Spectrograph. Our studies indicate that NLR kinematics dominated by radial outflow can be fit with simple biconical outflow models that can be used to determine the inclination of the bicone axis, and hence the obscuring torus, with respect to our LOS. We present NLR analysis of 53 Seyfert galaxies and the resulting inclinations from models of 17 individual AGNs with clear signatures of biconical outflows. Our model results agree with the unified model in that Seyfert 1 AGNs have NLRs inclined further toward our LOS than Seyfert 2 AGNs. Knowing the inclinations of these AGN NLRs, and thus their accretion disk and/or torus axes, will allow us to determine how their observed properties vary as a function of polar angle. We find no correlation between the inclinations of the AGN NLRs and the disks of their host galaxies, indicating that the orientation of the gas in the torus is independent of that of the host disk.

  6. Results from (anti-)(hyper-)nuclei production and searches for exotic bound states with ALICE at the LHC

    NASA Astrophysics Data System (ADS)

    Sharma, Natasha

    2016-12-01

    The excellent particle identification capabilities of the ALICE detector, using the time projection chamber and the time-of-flight detector, allow the detection of light nuclei and anti-nuclei. Furthermore, the high tracking resolution provided by the inner tracking system enables the separation of primary nuclei from those coming from the decay of heavier systems. This allows for the reconstruction of decays such as the hypertriton mesonic weak decay (H3Λ →3He +π-), the decay of a hypothetical bound state of a Λn into a deuteron and pion or the H-dibaryon decaying into a Λ, a proton and a π-. An overview of the production of stable nuclei and anti-nuclei in proton-proton, proton-lead and, in particular, lead-lead collisions is presented. Hypernuclei production rates in Pb-Pb are also shown, together with the upper limits estimated on the production of hypothetical exotica candidates. The results are compared with predictions for the production in thermal (statistical) and coalescence models.

  7. Preliminary investigation into aerosol mobilization resulting from fusion reactor disruptions

    SciTech Connect

    Sharpe, J.P.; Bourham, M.A.; Gilligan, J.G.

    1996-12-31

    An experimental system has been developed to study disruption-induced aerosol mobilization for fusion accident analysis. The SIRENS high heat flux facility at North Carolina State University has been modified to closely simulate disruption conditions expected in tokamak reactors. A hot vapor is formed by an ablation-controlled arc and expansion cooled into a glass chamber, where particle condensation and growth occur. The particles are collected and analyzed for relevant transport properties (e.g. size distribution and shape). Particle characterization methods are discussed, and preliminary results based on simple analysis techniques are given. 2 refs., 6 figs.

  8. Preliminary results of an intercomparison of total ozone spectrophotometers

    NASA Technical Reports Server (NTRS)

    Parsons, C. L.; Gerlach, J. C.; Williams, M. E.; Kerr, J. B.

    1981-01-01

    Preliminary results from an intercomparison of five total ozone spectrophotometers are presented. These are the Dobson spectrophotometer, the USSR M-83 ozonometer, the Canterbury filter photometer, the SenTran Company filter photometer, and the Brewer grating spectrophotometer. The pertinent characteristics of each are described, and conclusions are drawn about the agreement of each instrument's measurements with the Dobson's values over a time period of nearly one year. A discussion of the importance of calibration and long-term stability and reliability is included.

  9. Preliminary results of an intercomparison of total ozone spectrophotometers

    NASA Technical Reports Server (NTRS)

    Parsons, C. L.; Gerlach, J. C.; Williams, M. E.; Kerr, J. B.

    1981-01-01

    Preliminary results from an intercomparison of five total ozone spectrophotometers are presented. These are the Dobson spectrophotometer, the USSR M-83 ozonometer, the Canterbury filter photometer, the SenTran Company filter photometer, and the Brewer grating spectrophotometer. The pertinent characteristics of each are described, and conclusions are drawn about the agreement of each instrument's measurements with the Dobson's values over a time period of nearly one year. A discussion of the importance of calibration and long-term stability and reliability is included.

  10. Preliminary results of SMM exposed aluminized Kapton and silvered Teflon

    NASA Technical Reports Server (NTRS)

    Santos-Mason, B.

    1985-01-01

    Early Space Shuttle flights revealed that organic materials, such as those used in thermal control blankets and paints in the payload bay, were adversely affected in the low Earth orbit environment. Examination of eroded surfaces on these early flights and materials experiments performed on subsequent flights led to the conclusion that atomic oxygen present at Shuttle operating altitudes was responsible for surface degradation. The Solar Maximum Mission provided surfaces that had been exposed in real time to atomic oxygen and ultraviolet radiation. Preliminary results of studies of the microscopic surface effects on silvered Teflon and aluminized Kapton used for thermal control on the Solar Maximum Mission are presented.

  11. Preliminary science results of Voyager 1 Saturn encounter

    NASA Technical Reports Server (NTRS)

    Bane, D.

    1981-01-01

    Preliminary science results of the Voyager 1 encounter of the planet Saturn are reported. On August 22, 1980, the spacecraft was 109 million km (68 million mi) from Saturn. Closest approach to Saturn took place on November 12, at 3:46 p.m. (PDT), when the spacecraft passed 126,000 km (78,000 mi) from the cloud tops. Measurements of the atmosphere, wind speed, radiation, six surrounding rings, and the planet's old and newly found satellites were recorded. The encounter ended December 15, 1980. The spacecraft took more than 17,500 photographs of Saturn and its satellites.

  12. Preliminary results from a shallow water benthic grazing study

    USGS Publications Warehouse

    Jones, N.L.; Monismith, Stephen G.; Thompson, Janet K.

    2005-01-01

    Despite great improvements in our knowledge on the effects of benthic grazers on seston concentrations in water columns, the effects of different hydrodynamic conditions on grazing rates has not been formulated. This makes it difficult to assess the system-wide effect of the benthic ecosystem on phytoplankton concentrations. Furthermore, it affects our ability to predict the potential success of a benthic species, such as the invasive clams Corbicula fluminea and Potamocorbula amurensis. This paper presents the preliminary results of a control volume approach to elucidate the effect of different hydrodynamic conditions on the grazing rates of Corbicula fluminea.

  13. V and V Efforts of Auroral Precipitation Models: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Zheng, Yihua; Kuznetsova, Masha; Rastaetter, Lutz; Hesse, Michael

    2011-01-01

    Auroral precipitation models have been valuable both in terms of space weather applications and space science research. Yet very limited testing has been performed regarding model performance. A variety of auroral models are available, including empirical models that are parameterized by geomagnetic indices or upstream solar wind conditions, now casting models that are based on satellite observations, or those derived from physics-based, coupled global models. In this presentation, we will show our preliminary results regarding V&V efforts of some of the models.

  14. Microwave remote sensing of snow experiment description and preliminary results

    NASA Technical Reports Server (NTRS)

    Ulaby, F. T. (Principal Investigator); Stiles, W. H.; Hanson, B. C.

    1977-01-01

    The active and passive microwave responses to snow were investigated at a site near Steamboat Springs, Colorado during the February and March winter months. The microwave equipment was mounted atop truck-mounted booms. Data were acquired at numerous frequencies, polarizations, and angles of incidence for a variety of snow conditions. The experiment description, the characteristics of the microwave and ground truth instruments, and the results of a preliminary analysis of a small portion of the total data volume acquired in Colorado are documented.

  15. Ice nuclei measurements from solid rocket motor effluents

    NASA Technical Reports Server (NTRS)

    Hindman, E. E., II

    1980-01-01

    The ice crystal forming nuclei (IN) measured in solid rocket motor (SRM) exhaust products is discussed in relation to space shuttle exhaust. Preliminary results from laboratory investigations and flight preparations for March 1978 Titan launch are discussed. The work necessary to provide adequate measurements of IN and cloud condensation nuclei (CCN) in the stabilized ground clouds from SRM's is studied.

  16. Preliminary Results Of A 600 Joules Small Plasma Focus Device

    NASA Astrophysics Data System (ADS)

    Lee, S. H.; Yap, S. L.; Wong, C. S.

    2009-07-01

    Preliminary results of a 600 J (3.7 μF, 18 kV) Mather type plasma focus device operated at low pressure will be presented. The discharge is formed between a solid anode with length of 6 cm and six symmetrically and coaxially arranged cathode rods of same lengths. The cathode base is profiled in a knife-edge design and a set of coaxial plasma gun are attached to it in order to initiate the breakdown and enhance the current sheath formation. The experiments have been performed in argon gas under a low pressure condition of several microbars. The discharge current and the voltage across the electrodes during the discharge are measured with high voltage probe and current coil. The current and voltage characteristics are used to determine the possible range of operating pressure that gives good focusing action. At a narrow pressure regime of 9.0±0.5 μbar, focusing action is observed with good reproducibility. Preliminary result of ion beam energy is presented. More work will be carried out to investigate the radiation output.

  17. Preliminary Results from the Space Probe Pioneer V

    NASA Technical Reports Server (NTRS)

    Fan, C. Y.; Meyer, P.; Simpson, J. A.

    1960-01-01

    The space probe Pioneer V was launched March 11, 1960, into an orbit around the sun and inside the orbit of earth. The scientific apparatus included instruments identical with the University of Chicago apparatus used on Explorer VI [Fan, Meyer, and Simpson, 1960b], namely, energetic particle detectors which measure fluxes of protons with energies greater than 75 Mev, electrons with energies greater than 15 Mev, and the bremsstrahlung from electrons and y rays of lower energy. Simultaneously with the measurements in Pioneer V a series of four neutron monitor piles were recording the changes in cosmic radiation intensity at the earth. We report here on some preliminary results obtained from the Chicago experiments during the time within which Pioneer V traveled to a distance of approximately 8 x 10 km from earth. Beginning on March 20, solar activity rapidly increased with many solar flares, radio noise bursts, etc., over a period of 10 days. Most of our results relate to this period. The preliminary data are given in Figures 1 and 2.

  18. Frist preliminary results of carbon dioxide retrieval algorithm

    NASA Astrophysics Data System (ADS)

    Jung, Y.; Kim, W. V.; Lee, H.; Kim, J.; Boesch, H.

    2013-12-01

    The significant increase in atmospheric carbon dioxide (CO2) over the last two hundred years represents critical variations both to the atmosphere and the global carbon cycle. Satellite measurement is one of the most effective approaches to monitor the global distributions of CO2 with high spatio-temporal resolutions and is expected to improve the accuracy of carbon source and sink estimates (Rayner and O'Brien, 2001; Houweling et al., 2004). The Greenhouse Gases Observing SATellite (GOSAT), which was launched on January 2009, is the world's first satellite dedicated to measure the atmospheric concentrations of CO2 from space. Even though many studies to develop the CO2 retrieval algorithms are performed, there have been serious limitations in spatial coverage and uncertainties due to aerosols and thin cirrus clouds. In this study, we demonstrate our retrieval algorithms of CO2 concentrations from GOSAT and show its preliminary results showing the variations CO2 concentration in global. The quality of the preliminary results in this study will be evaluated through comparison with collocated ground-based observations at several TCCON sites. In the future, we plan to investigate interferences by aerosols using our independent aerosol retrieval algorithms and improve its retrieval quality. This study would be informative to study the estimate the carbon sources and sinks in more detail.

  19. Preliminary Results Of A 600 Joules Small Plasma Focus Device

    SciTech Connect

    Lee, S. H.; Yap, S. L.; Wong, C. S.

    2009-07-07

    Preliminary results of a 600 J (3.7 muF, 18 kV) Mather type plasma focus device operated at low pressure will be presented. The discharge is formed between a solid anode with length of 6 cm and six symmetrically and coaxially arranged cathode rods of same lengths. The cathode base is profiled in a knife-edge design and a set of coaxial plasma gun are attached to it in order to initiate the breakdown and enhance the current sheath formation. The experiments have been performed in argon gas under a low pressure condition of several microbars. The discharge current and the voltage across the electrodes during the discharge are measured with high voltage probe and current coil. The current and voltage characteristics are used to determine the possible range of operating pressure that gives good focusing action. At a narrow pressure regime of 9.0+-0.5 mubar, focusing action is observed with good reproducibility. Preliminary result of ion beam energy is presented. More work will be carried out to investigate the radiation output.

  20. Determining Inclinations of Active Galactic Nuclei via their Narrow-line Region Kinematics. I. Observational Results

    NASA Astrophysics Data System (ADS)

    Fischer, T. C.; Crenshaw, D. M.; Kraemer, S. B.; Schmitt, H. R.

    2013-11-01

    Active galactic nuclei (AGNs) are axisymmetric systems to first order; their observed properties are likely strong functions of inclination with respect to our line of sight (LOS). However, except for a few special cases, the specific inclinations of individual AGNs are unknown. We have developed a promising technique for determining the inclinations of nearby AGNs by mapping the kinematics of their narrow-line regions (NLRs), which are often easily resolved with Hubble Space Telescope [O III] imaging and long-slit spectra from the Space Telescope Imaging Spectrograph. Our studies indicate that NLR kinematics dominated by radial outflow can be fit with simple biconical outflow models that can be used to determine the inclination of the bicone axis, and hence the obscuring torus, with respect to our LOS. We present NLR analysis of 53 Seyfert galaxies and the resulting inclinations from models of 17 individual AGNs with clear signatures of biconical outflows. Our model results agree with the unified model in that Seyfert 1 AGNs have NLRs inclined further toward our LOS than Seyfert 2 AGNs. Knowing the inclinations of these AGN NLRs, and thus their accretion disk and/or torus axes, will allow us to determine how their observed properties vary as a function of polar angle. We find no correlation between the inclinations of the AGN NLRs and the disks of their host galaxies, indicating that the orientation of the gas in the torus is independent of that of the host disk. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. These observations are associated with programs 11243, 11611, and 12212.

  1. Deformed shell model results for neutrinoless double beta decay of nuclei in A = 60 - 90 region

    NASA Astrophysics Data System (ADS)

    Sahu, R.; Kota, V. K. B.

    2015-03-01

    Nuclear transition matrix elements (NTME) for the neutrinoless double beta decay (Oνββ or OνDBD) of 70Zn, 80Se and 82Se nuclei are calculated within the framework of the deformed shell model (DSM) based on Hartree-Fock (HF) states. For 70Zn, jj44b interaction in 2p3/2, 1f5/2, 2p1/2 and 1g9/2 space with 56Ni as the core is employed. However, for 80Se and 82Se nuclei, a modified Kuo interaction with the above core and model space are employed. Most of our calculations in this region were performed with this effective interaction. However, jj44b interaction has been found to be better for 70Zn. The above model space was used in many recent shell model (SM) and interacting boson model (IBM) calculations for nuclei in this region. After ensuring that DSM gives good description of the spectroscopic properties of low-lying levels in these three nuclei considered, the NTME are calculated. The deduced half-lives with these NTME, assuming neutrino mass is 1 eV, are 1.1 × 1026, 2.3 × 1027 and 2.2 × 1024 yr for 70Zn, 80Se and 82Se, respectively.

  2. Magnetic Field Observations near Mercury: Preliminary Results from Mariner 10.

    PubMed

    Ness, N F; Behannon, K W; Lepping, R P; Whang, Y C; Schatten, K H

    1974-07-12

    Results are presented from a preliminary analysis of data obtained near Mercury on 29 March 1974 by the NASA-GSFC magnetic field experiment on Mariner 10. Rather unexpectedly, a very well-developed, detached bow shock wave, which develops as the super-Alfvénic solar wind interacts with the planet, has been observed. In addition, a magnetosphere-like region, with maximum field strength of 98 gammas at closest approach (704 kilometers altitude), has been observed, contained within boundaries similar to the terrestrial magnetopause. The obstacle deflecting the solar wind flow is global in size, but the origin of the enhanced magnetic field has not yet been uniquely established. The field may be intrinsic to the planet and distorted by interaction with the solar wind. It may also be associated with a complex induction process whereby the planetary interior-atmosphere-ionosphere interacts with the solar wind flow to generate the observed field by a dynamo action. The complete body of data favors the preliminary conclusion that Mercury has an intrinsic magnetic field. If this is correct, it represents a major scientific discovery in planetary magnetism and will have considerable impact on studies of the origin of the solar system.

  3. Preliminary test results with a Stirling Laboratory Research Engine

    NASA Technical Reports Server (NTRS)

    Hoehn, F. W.; Nguyen, B. D.; Schmit, D. D.

    1979-01-01

    The Jet Propulsion Laboratory has designed, assembled, and initiated testing of a Stirling Laboratory Research Engine (SLRE). This preprototype engine provides a research tool to support the development of a broad range of analytical modeling and experimental efforts. The SLRE is a horizontally opposed, two-piston, single-acting Stirling engine with a split crankshaft drive mechanism. The paper discusses the preliminary results obtained during engine motoring tests and compares these results with two different analytical prediction models. Comparisons are made between experiment, the classical Schmidt analysis, and the JPL Stirling Cycle Analysis Model (SCAM). SCAM is a computerized one-dimensional, cyclic, compressible flow model of the SLRE and consists of a compilation of individual component subroutines. The formulation and current state of development of the SCAM program is briefly described.

  4. The Gemini Planet Imager Coronagraph Testbed Preliminary Performance Results

    NASA Astrophysics Data System (ADS)

    Roberts, Robin

    2010-01-01

    The Gemini Planet Imager (GPI) is a new science instrument being developed and slated for first light early 2011 on the twin 8m Gemini telescopes. Operating in the near infrared, this ground-based, extreme Adaptive Optics (ExAO) coronographic instrument will provide the ability to detect, characterize and analyze young (< 2GYr), self-luminous, extrasolar planets with brightness contrast ratios ≤ 10-7 when compared to their parent star. The coronagraph subsystem includes a pupil apodization, a hard-edged focal plane mask as well as a Lyot stop. Preliminary results indicate that the testbed is performing at very high contrast, having achieved broadband contrasts (H-band) below 10-6 at separations > 5λ/D. Fraunhoffer and Fresnel propagation modeling were used to analyze the testbed results.

  5. Multi-GNSS Orbit and Clock Combination: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Fritsche, Mathias

    2016-04-01

    In the framework of the Multi-GNSS Experiment (MGEX) a number of Analysis Centers (ACs) extended their software capabilities to process signals from the BeiDou, Galileo, and QZSS systems in addition to the well established systems GPS and GLONASS. Currently, the MGEX product portfolio covers precise satellite orbits and clocks, receiver clocks, signal biases, and Earth rotation parameters generated by the individual ACs. This presentation will provide an overview on the available AC-specific MGEX products. In addition, an introduction to a multi-GNSS orbit and clock combination procedure will be given. Finally, preliminary results from that multi-GNSS combination including a comparison with corresponding operational IGS products will be reported along with a discussion of the results.

  6. Preliminary results on two-dimensional interferometry of HL Tau

    NASA Technical Reports Server (NTRS)

    Tollestrup, Eric V.; Harvey, Paul M.

    1989-01-01

    Preliminary two-dimensional speckle interferometry results of HL Tau were found to be qualitatively similar to those found with one-dimensional slit scanning techniques; results consist of a resolved component (approximately 0.7 arcsec in size) and an unresolved component. Researchers are currently reducing the rest of the data (taken on three different telescopes and at three different wavelengths) and are also exploring other high resolution methods like the shift and add technique and selecting only the very best images for processing. The availability of even better two-dimensional arrays within the next couple of years promises to make speckle interferometry and other high resolution techniques very powerful and exiting tools for probing a variety of objects in the subarcsec regime.

  7. Windblown sand on Venus - Preliminary results of laboratory simulations

    NASA Technical Reports Server (NTRS)

    Greeley, R.; Iversen, J.; Leach, R.; Marshall, J.; Williams, S.; White, B.

    1984-01-01

    Small particles and winds of sufficient strength to move them have been detected from Venera and Pioneer-Venus data and suggest the existence of aeolian processes on Venus. The Venus wind tunnel (VWT) was fabricated in order to investigate the behavior of windblown particles in a simulated Venusian environment. Preliminary results show that sand-size material is readily entrained at the wind speeds detected on Venus and that saltating grains achieve velocities closely matching those of the wind. Measurements of saltation threshold and particle flux for various particle sizes have been compared with theoretical models which were developed by extrapolation of findings from Martian and terrestrial simulations. Results are in general agreement with theory, although certain discrepancies are apparent which may be attributed to experimental and/or theoretical-modeling procedures. Present findings enable a better understanding of Venusian surface processes and suggest that aeolian processes are important in the geological evolution of Venus.

  8. Preliminary results from Radiation Environment Investigations on GIOVE-A

    NASA Astrophysics Data System (ADS)

    Underwood, C. I.; Taylor, B.; Ryden, K. A.; Rodgers, D. J.; Dyer, C. S.; Evans, H. D. R.; Daly, E. J.

    GIOVE-A is a small satellite build by SSTL UK for the European Space Agency as a first element of its Galileo satellite navigation programme GIOVE-A s primary payload is a navigation payload to secure use of the frequencies allocated by the International Telecommunications Union ITU for the Galileo system and to demonstrate critical technologies for the navigation payload of future operational Galileo satellites It also includes radiation environments and effects experiments constructed by the University of Surrey CEDEX and QinetiQ MERLIN to characterise the hazardous MEO environment GIOVE-A was launched 28 December 2005 into a 24000 km circular orbit with 56 degree inclination The environment experiments contain detectors to register the electron proton and ion signals and also to investigate the resulting total dose and charging environments The payloads will be described and preliminary results will be presented

  9. Preliminary Results from Galaxy Zoo: The Sloan by Eye

    NASA Astrophysics Data System (ADS)

    Lintott, Chris; Schawinski, K.; Land, K.; Slosar, A.; Szalay, A.; Bamford, S.; Nichol, R.; Thomas, D.; van den Berg, J.; Murray, P.; Raddick, J.; Andreescu, D.; Galaxy Zoo Team

    2007-12-01

    The relationship between the morphology of a galaxy and its formation and evolution is a fundamental question for modern astrophysics. However, classification by morphology is still most reliably performed by visual inspection of the data, and so in the era of large redshift surveys it is normal to estimate morphology via proxies for galaxy shape such as colour or the density profile (e.g. Bernardi et al. 2003). The use of such proxies must introduce a bias into the result (See Schawinski et al. 2007). In this presentation we present the first scientific results of the Galaxy Zoo project, which invited the public to inspect and classify galaxies drawn from the Sloan Digital Sky Survey (SDSS). (Our methodology is described in an accompanying outreach poster) More than 110,000 people have viewed more than 30 million images, leading to a catalogue of more than 300,000 galaxies with secure classifications. A comparison with smaller catalogues produced by professional astronomers (e.g. Fukugita et al. 2007) is used to demonstrate the accuracy of Galaxy Zoo classifications. One obvious advantage of our approach is the identification of galaxies that appear morphologically normal, but are otherwise unusual. As an example, we present preliminary results from a study of extremely blue early-type galaxies identified by the project. We also derive for the first time a low-redshift morphology-density relation which is based on visual morphologies, covering an unprecedented range of environments across the whole SDSS. In addition to galaxy morphology, classifiers were also asked to identify the sense of rotation of spiral galaxies; we present preliminary results providing a test of the cosmological principle, as well as constraints on the tidal torque theory of structure formation.

  10. Implications of Scheduled ITC Reversion for RPS Compliance: Preliminary Results

    SciTech Connect

    Lowder, Travis; Miller, John; O'Shaughnessy, Eric; Heeter, Jenny

    2015-09-14

    This poster presents DRAFT initial results of a forthcoming NREL analysis. The analysis investigates the impacts of the scheduled investment tax credit (ITC) reversion from 30 percent to 10 percent for certain solar photovoltaic projects. Specifically, it considers whether the reversion will result in increased use of alternative compliance payments (ACPs) in lieu of solar renewable energy credits (SRECs) for renewable portfolio standard (RPS) compliance. The analysis models the effect of a 10 percent ITC on power purchase agreement (PPA) prices for non-residential systems in the eight states with solar carve-outs and solar ACPs. Our preliminary results suggest that states will likely install sufficient capacity to meet long-term targets through SRECs rather than ACPs following the ITC reversion. However, the analysis shows that the ITC reversion could affect project economics such that capacity shortfalls in certain states could temporarily increase the use of ACPs. NREL anticipates publishing a full report of this analysis in fall 2015. credits (SRECs) for renewable portfolio standard (RPS) compliance. The analysis models the effect of a 10 percent ITC on power purchase agreement (PPA) prices for non-residential systems in the eight states with solar carve-outs and solar ACPs. Our preliminary results suggest that states will likely install sufficient capacity to meet long-term targets through SRECs rather than ACPs following the ITC reversion. However, the analysis shows that the ITC reversion could affect project economics such that capacity shortfalls in certain states could temporarily increase the use of ACPs. NREL anticipates publishing a full report of this analysis in fall 2015.

  11. 78 FR 34340 - Welded Carbon Steel Standard Pipe and Tube Products From Turkey: Preliminary Results of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-07

    ... did not. The preliminary results are listed below in the section titled ``Preliminary Results of... produced by Borusan and Erbosan for which these companies did not know that the merchandise was destined...

  12. Preliminary results of non-contact THz imaging of cornea

    NASA Astrophysics Data System (ADS)

    Sung, Shijun; Garritano, James; Bajwa, Neha; Deng, Sophie; Hubschman, Jean-Pierre; Grundfest, Warren S.; Taylor, Zachary D.

    2015-03-01

    This paper presents a novel THz optical design that allows the acquisition of THz reflectivity maps of in vivo cornea without the need for a field flattening window and preliminary imaging results of in vivo rabbit cornea. The system's intended use is to sense small changes in corneal tissue water content (CTWC) that can be precursors for a host of diseases and pathologies. Unique beam optics allows the scanning of a curved surface at normal incidence while keeping the source detector and target stationary. Basic system design principles are discussed and image sets of spherical calibration targets and corneal phantom models are presented. The presented design will enable, for the first time, non-contact THz imaging of animal and human cornea.

  13. Synthetic Light Curves for Born Again Events: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Miller Bertolami, M. M.; Rohrmann, R. D.

    2013-01-01

    The development of surveys which will be able to cover a large region of the sky several times per year will allow the massive detection of transient events taking place on timescales of years. In addition, the projected full digitalization of the Harvard plate collection will open a new window on the identification of slow transients taking place on timescales of centuries. In particular, these projects will allow the detection of stars undergoing slow eruptions as those expected during late helium flashes in the post-AGB evolution. In order to identify those transients which correspond with late helium flashes the development of synthetic light curves of those events is mandatory. In this connection we present preliminary results of a project aimed at computing grids of theoretical light curves of born again stars.

  14. The Southern HII Region Discovery Survey: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Shea, Jeanine; Wenger, Trey; Balser, Dana S.; Anderson, Loren D.; Armentrout, William P.; Bania, Thomas M.; Dawson, Joanne; Miller Dickey, John; Jordan, Christopher; McClure-Griffiths, Naomi M.

    2017-01-01

    HII regions are some of the brightest sources at radio frequencies in the Milky Way and are the sites of massive O and B-type star formation. They have relatively short (< 10 Myr) lifetimes compared to other Galactic objects and therefore reveal information about spiral structure and the chemical evolution of the Galaxy. The HII Region Discovery Surveys (HRDS) discovered about 800 new HII regions in the Galactic longitude range -20 degrees to 270 degrees using primarily the Green Bank Telescope. Candidate HII regions were selected from mid-infrared emission coincident with radio continuum emission, and confirmed as HII regions by the detection of radio recombination lines. Here we discuss the Southern HII Region Discovery Survey (SHRDS), a continuation of the HRDS using the Australia Telescope Compact Array over the Galactic longitude range 230 to 360 degrees. We have reduced and analyzed a small sub-set of the SHRDS sources and discuss preliminary results, including kinematic distances and metallicities.

  15. Preliminary Results From the First Flight of ATIC

    NASA Technical Reports Server (NTRS)

    Seo, E. S.; Adams, James H., Jr.; Ahn, H.; Ampe, J.; Bashindzhagyan, G.; Case, G.; Whitaker, Ann F. (Technical Monitor)

    2001-01-01

    The Advanced Thin Ionization Calorimeter (ATIC) instrument is designed to measure the composition C and energy spectra of Z = 1 to 28 cosmic rays over the energy range approximately 10 GeV - 100 TeV. The instrument was calibrated in September 1999 at CERN using accelerated electron, proton and pion beams. ATIC was launched as a long duration balloon test flight on 12/28/00 local time from McMurdo, Antarctica. After flying successfully for about 16 days the payload was recovered in excellent condition. Absolute calibration of the detector response was made using cosmic-ray muons. The data analysis algorithm which was developed with Monte Carlo simulations and validated with the CERN beam test will be used for the flight data analysis. Preliminary results of the protons and C helium spectra will be reported in this paper.

  16. Preliminary Results From The First Flight of ATIC

    NASA Technical Reports Server (NTRS)

    Seo, E. S.; Whitaker, Ann F. (Technical Monitor)

    2001-01-01

    The Advanced Thin Ionization Calorimeter (ATIC) instrument is designed to measure the composition and energy spectra of Z = 1 to 28 cosmic rays over the energy range approximately 10 GeV - 100 TeV. The instrument was calibrated in September 1999 at CERN using accelerated electron, proton and pion beams. ATIC was launched as a long duration balloon test flight on 12/28/00 local time from McMurdo, Antarctica. After flying successfully for about 16 days the payload was recovered in excellent condition. Absolute calibration of the detector response was made using cosmic-ray muons. The data analysis algorithm which was developed with Monte Carlo simulations and validated with the CERN beam test will be used for the flight data analysis. Preliminary results of the proton and helium spectra will be reported in this paper.

  17. Aconcagua peak geodynamics from GPS observations, Mendoza, Argentina: preliminary results

    NASA Astrophysics Data System (ADS)

    Mateo, M. L.; Lenzano, L. E.; Moreiras, S. M.

    2009-12-01

    In 2005, the SIGMA Program (Mount Aconcagua GNSS Research System) was implemented to investigate the geodynamics of the Aconcagua mountain region in the Central Andes. For this purpose, a continuously recording GPS station, ACON, was installed on the summit of Mount Aconcagua at 6.292 m a.s.l. The installation required special technology to support the equipment under extreme climatic conditions. The power supply system was optimized in 2008, so that a greater quantity of data could be recorded. This, in turn, will lead to more accurate estimates of displacement of the Aconcagua peak. Preliminary results from the ACON station indicate an average horizontal velocity of 0.023±0.0001 m/yr toward NE in 2 time windows between 2006 and 2008.

  18. Ex vivo accommodation simulator II: concept and preliminary results

    NASA Astrophysics Data System (ADS)

    Ehrmann, Klaus; Ho, Arthur; Parel, Jean-Marie

    2004-07-01

    A new instrument was developed to simulate the accommodation of excised human and animal crystalline lenses. The sclera is attached to 8 radially arranged translation stages and dissected into 8 segments. Change in accommodation is simulated by pulling and releasing the scleral segments, varying the load on the zonules and the capsular bag. Each translation stage is equipped with a sensitive force transducer for simultaneous recording of load and displacement. Additionally, changes in optical power, lens diameter, lens thickness and lens shape can be observed and quantified while the lens is stretched and released. The sensitivity and accuracy of the instrument was verified using steel springs and elastic bands. Preliminary results from sensitivity testing and instrument calibration are presented.

  19. Preliminary Results From The First Flight of ATIC

    NASA Technical Reports Server (NTRS)

    Seo, E. S.; Whitaker, Ann F. (Technical Monitor)

    2001-01-01

    The Advanced Thin Ionization Calorimeter (ATIC) instrument is designed to measure the composition and energy spectra of Z = 1 to 28 cosmic rays over the energy range approximately 10 GeV - 100 TeV. The instrument was calibrated in September 1999 at CERN using accelerated electron, proton and pion beams. ATIC was launched as a long duration balloon test flight on 12/28/00 local time from McMurdo, Antarctica. After flying successfully for about 16 days the payload was recovered in excellent condition. Absolute calibration of the detector response was made using cosmic-ray muons. The data analysis algorithm which was developed with Monte Carlo simulations and validated with the CERN beam test will be used for the flight data analysis. Preliminary results of the proton and helium spectra will be reported in this paper.

  20. Preliminary Results From the First Flight of ATIC

    NASA Technical Reports Server (NTRS)

    Seo, E. S.; Adams, James H., Jr.; Ahn, H.; Ampe, J.; Bashindzhagyan, G.; Case, G.; Whitaker, Ann F. (Technical Monitor)

    2001-01-01

    The Advanced Thin Ionization Calorimeter (ATIC) instrument is designed to measure the composition C and energy spectra of Z = 1 to 28 cosmic rays over the energy range approximately 10 GeV - 100 TeV. The instrument was calibrated in September 1999 at CERN using accelerated electron, proton and pion beams. ATIC was launched as a long duration balloon test flight on 12/28/00 local time from McMurdo, Antarctica. After flying successfully for about 16 days the payload was recovered in excellent condition. Absolute calibration of the detector response was made using cosmic-ray muons. The data analysis algorithm which was developed with Monte Carlo simulations and validated with the CERN beam test will be used for the flight data analysis. Preliminary results of the protons and C helium spectra will be reported in this paper.

  1. Charge breeder for the SPIRAL1 upgrade: Preliminary results

    SciTech Connect

    Maunoury, L. Delahaye, P.; Dubois, M.; Bajeat, O.; Frigot, R.; Jeanne, A.; Jardin, P.; Kamalou, O.; Lecomte, P.; Osmond, B.; Peschard, G.; Savalle, A.; Angot, J.; Sole, P.; Lamy, T.

    2016-02-15

    In the framework of the SPIRAL1 upgrade under progress at the GANIL lab, the charge breeder based on a LPSC Phoenix ECRIS, first tested at ISOLDE has been modified to benefit of the last enhancements of this device from the 1+/n+ community. The modifications mainly concern the 1 + optics, vacuum techniques, and the RF—buffer gas injection into the charge breeder. Prior to its installation in the midst of the low energy beam line of the SPIRAL1 facility, it has been decided to qualify its performances and several operation modes at the test bench of LPSC lab. This contribution shall present preliminary results of experiments conducted at LPSC concerning the 1 + to n+ conversion efficiencies for noble gases as well as for alkali elements and the corresponding transformation times.

  2. Preliminary medical results of the Mir year-long mission

    NASA Astrophysics Data System (ADS)

    Grigoriev, A. I.; Bugrov, S. A.; Bogomolov, V. V.; Egorov, A. D.; Kozlovskaya, I. B.; Pestov, I. D.; Polyakov, V. V.; Tarasov, I. K.

    The basic goal of medical investigations during and after the 366-day mission was to accumulate data about physiological responses to such a long exposure to microgravity. In flight, cardiovascular and other systems were examined in detail and the efficacy of countermeasures used was assessed. After flight, physiological systems were also followed very carefully. According to the preliminary data, the medical results obtained during and after flight give evidence that man can well adapt to a year-long space flight, maintaining good health and adequate work capacity. The readaptation process was very similar to that observed after shorter flights (6-II months). As compared to former flights, no new or qualitatively different changes in the vital systems of the body were seen. The observations indicate that the duration of manned space missions can be further increased.

  3. Preliminary Results from the Second EUVE Right Angle Program Catalog

    NASA Astrophysics Data System (ADS)

    Christian, D. J.; Craig, N.; Cahill, W. D.; Roberts, B.; Malina, R. F.

    1997-12-01

    We present preliminary results of our search for new sources in the EUVE Right Angle Program (RAP) data. The EUVE all-sky survey telescopes (also known as ``scanners'') are mounted at right angles to the Deep Survey and spectrometer instruments, and obtain photometric data in four bands centered at ~ 100 Angstroms (Lexan/B), ~ 200 Angstroms (Al/Ti/C), ~ 400 Angstroms (Ti/Sb/Al), and ~ 550 Angstroms (Sn/SiO). This allows the Right Angle Program to accumulate data serendipitously during pointed spectroscopic observations. The long exposure times possible with RAP observations provide much greater sensitivity than the all-sky survey. One-half of the scanner data since January 1994 has been analyzed, yielding approximately 200 new source detections. We present light-curves and variability measurements for the brighter sources. We have detected stellar flares from several yet to be identified sources. Source identifications and distribution by type will be also be presented.

  4. Preliminary Test Results for the MICE Spectrometer Superconducting Solenoids

    SciTech Connect

    Virostek, Steve P.; Green, Michael A; Li, Derun; Zisman, Michael S.; Wang, S.T.; Wahrer, R.; Taylor, Clyde; Lu, X.; Chen, J. Y.; Wang, Mimi; Juang, Tiki

    2008-08-02

    This report describes the MICE spectrometer solenoids as built. Each magnet consists of five superconducting coils. Two coils are used to tune the beam going from or to the MICE spectrometer from the rest of the MICE cooling channel. Three spectrometer coils (two end coils and a long center coil) are used to create a uniform 4 T field (to {+-}0.3 percent) over a length of 1.0 m within a diameter of 0.3 m. The three-coil spectrometer set is connected in series. The two end coils use small power supplies to tune the uniform field region where the scintillating fiber tracker is located. This paper will present the results of the preliminary testing of the first spectrometer solenoid.

  5. RF tomography of metallic objects in free space: preliminary results

    NASA Astrophysics Data System (ADS)

    Li, Jia; Ewing, Robert L.; Berdanier, Charles; Baker, Christopher

    2015-05-01

    RF tomography has great potential in defense and homeland security applications. A distributed sensing research facility is under development at Air Force Research Lab. To develop a RF tomographic imaging system for the facility, preliminary experiments have been performed in an indoor range with 12 radar sensors distributed on a circle of 3m radius. Ultra-wideband pulses are used to illuminate single and multiple metallic targets. The echoes received by distributed sensors were processed and combined for tomography reconstruction. Traditional matched filter algorithm and truncated singular value decomposition (SVD) algorithm are compared in terms of their complexity, accuracy, and suitability for distributed processing. A new algorithm is proposed for shape reconstruction, which jointly estimates the object boundary and scatter points on the waveform's propagation path. The results show that the new algorithm allows accurate reconstruction of object shape, which is not available through the matched filter and truncated SVD algorithms.

  6. MEMS-based microgratings: preliminary results of novel configurations

    NASA Astrophysics Data System (ADS)

    Castracane, James; Gutin, Mikhail A.

    1998-03-01

    The advent of micromachining has opened new doors for reducing the size and weight of conventional systems. A significant example is in the area of optics in which the size reduction can be exploited to produce ultra-miniature systems using MEMS device as the sensing or control elements. Using MEMS-based fabrication methods (the MUMPS runs), a series of optical diffraction gratings has been produced to examine limitations on the production methods and explore alternative applications. These devices consist of a variety of structures including single gratings, arrays of gratings and multi-periodic gratings. These devices are based on 3D architectures which can be adjusted in real time using electrostatic attraction from custom segmented electrode structures. The gratings were released and packaged for laboratory tests. Selected packaged devices were equipped with windows and integrated into a compact spectrograph to document spectral quality and performance. Preliminary results of mechanical, optical and electrical tests will be discussed.

  7. Preliminary results of thoracoscopic Belsey Mark IV antireflux procedure.

    PubMed

    Nguyen, N T; Schauer, P R; Hutson, W; Landreneau, R; Weigel, T; Ferson, P F; Keenan, R J; Luketich, J D

    1998-06-01

    Laparoscopic Nissen fundoplication has replaced open approaches for refractory gastroesophageal reflux disease (GERD) in many major medical centers. Here we report our preliminary results of the Belsey Mark IV antireflux procedure performed by video-assisted thoracoscopy (VATS-Belsey). Fifteen patients underwent VATS-Belsey. The indications for surgery included GERD refractory to medical therapy (n=10), achalasia (n=2), diffuse esophageal spasms (n=1), epiphrenic esophageal diverticulum (n=1), and paraesophageal hernia (n=1). The median operative time was 235 min. There were three conversions to open minithoracotomy (8-10 cm) necessitated by severe adhesions (n=2) and repair of a gastric perforation (n=1). The median hospital stay was 4 days. Postoperative complications included persistent air leaks, requiring discharge with a Heimlich valve in one patient. There were no perioperative deaths. At a median follow-up of 19 months, ten patients (66%) were asymptomatic and were not taking any antacids. One patient who had taken proton pump inhibitors preoperatively required postoperative H2 blockers for mild heartburn. In three patients, recurrent GERD symptoms (mean follow-up 6 months) led to laparoscopic takedown of the Belsey and Nissen fundoplication. One patient with achalasia, who had recurrent dysphagia after 1 year of relief following VATS myotomy and Belsey, underwent esophagectomy. The Belsey Mark IV antireflux procedure is technically feasible by VATS with minimal morbidity. However, our preliminary results suggest that open thoracotomy for Belsey Mark IV should remain the standard operation for GERD with poor esophageal motility when a thoracic approach is desired. We have modified our approach to laparoscopic partial fundoplications (Toupet or Dor) for severe GERD and poor esophageal motility when an abdominal approach is possible.

  8. Charge radii of exotic nuclei: nuclear results versus isotopic shift calculations

    NASA Astrophysics Data System (ADS)

    Tomaselli, M.; Liu, L. C.; Fritzsche, S.; Kühl, T.; Ursescu, D.; Neumayer, P.; Wojtaszek, A.

    2004-12-01

    We study the charge radii of exotic nuclei through nuclear calculations and isotopic-shift evaluations. The computations are performed in the framework of the dynamic-correlation model DCM for nuclei with an odd number of valence particles and in the boson dynamic-correlation model (BCDM) for those with an even number of valence particles. These nuclear models take fully into consideration the correlation between valence particles as well as between valence and core particles. Consequently, these computations may reveal feature physics which is associated to the strong correlation between the valence and the core polarized states. Moreover,we propose to analyze the obtained charge radii within the isotopic shift theory in which the electronic transitions for lithium and lithium-like ions are calculated by considering the three correlated electrons described by a method similar to the nuclear DCM model.

  9. PS187 - a good statistics study of antiproton interactions with nuclei: preliminary results

    SciTech Connect

    Sunier, J.W.; Bol, K.D.; Clover, M.R.; DeVries, R.M.; DiGiacomo, N.J.; Kapustinsky, J.S.; McGaughey, P.L.; Smith, G.R.; Sondheim, W.E.; Buenard, M.

    1984-01-01

    The goals of LEAR experiment PS187 are reviewed. The current status of the experiment is discussed, and final data on a search for anti p-nucleus bound states formed by the reactions /sup 28/Si(anti p,p) and /sup 28/Si(anti p,d) are presented.

  10. Elemental Abundances of Ultra-Heavy Nuclei Measured by SuperTIGER: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Murphy, R. P.; Binns, W. R.; Bose, R. G.; Dowkontt, P. F.; Israel, M. H.; Rauch, B. F.; Ward, J. E.; Brandt, T. J.; de Nolfo, G. A.; Hams, T.; Link, J. T.; Mitchell, J. W.; Sakai, K.; Sasaki, M.; Labrador, A. W.; Mewaldt, R. A.; Stone, E. C.; Waddington, C. J.; Wiedenbeck, M. E.

    2014-03-01

    The SuperTIGER (Trans-Iron Galactic Element Recorder) experiment was launched on a long-duration balloon flight from Williams Field, Antarctica, on December 8, 2012 and flew for a total of 55 days at a mean atmospheric depth of 4.4 g/cm2. The instrument is designed to measure the abundances of galactic cosmic rays in the charge (Z) range from 10 <= Z <= 40 with high statistical precision and excellent charge resolution, with exploratory measurements into the 40 < Z <= 60 range. The instrument, the methods of charge identification that are employed, and the SuperTIGER balloon flight will be described. The data that will be presented contain more than 600 events with charge 30 < Z <= 40, ~ 4.5x that collected by the two TIGER flights combined. The charge resolution obtained for iron is <0.18 cu. We will discuss the OB association model for the origin of galactic cosmic rays and show how SuperTIGER measurements will be used as a stringent test of this model. This research was supported by NASA under grants NNX09AC17G and NNX14AB25G and by the McDonnell Center for the Space Sciences at Washington University.

  11. New results in A similar or equal to 135 promethium nuclei

    NASA Astrophysics Data System (ADS)

    Pfohl, Jeffrey S.

    High-spin states in the A ~= 135 region near Z = 61 were populated using heavyion reactions at the Florida State University (FSU) Tandem-Linac and the Lawrence Berkeley National Laboratory (LBNL) 88'' cyclotron facilities. The Gammasphere spectrometer (LBNL), combined with the Washington University Microball charged particle detector, identified 15 different nuclei in the 10546Pd59 (3517Cl1 8X)@ 180 MeV reaction. The level schemes of 133,135Pm were extended significantly and are discussed. The 135Pm nucleus shows competing driving effects between the h11/2 protons which stabilize a prolate shape and h11/2 neutrons which drive the nucleus to oblate deformation. In addition, over 25 superdeformed bands were identified for 15 nuclei in the A~=135 region. The promethium nuclei accounted for eight superdeformed bands, two each in 133,135Pm and four in 136Pm.

  12. Smart isolation mount for army guns: I. Preliminary results

    NASA Astrophysics Data System (ADS)

    Allaei, Daryoush; Tarnowski, David J.; Mattice, Michael S.; Testa, Robert C.

    2000-06-01

    The work reported in this paper is focused on an effective and efficient solution, namely Smart Isolation Mount for Army Guns (SIMAG), to the weapon stabilization and fire control issues facing US Army guns. SIMAG is composed of the optimum integration of two innovative technologies. Vibration Control by Confinement and smart senor/actuator/active control systems. The combined approach may also be applied to a gun barrel to reduce its undesired vibratory motions excited by external and internal disturbances, such as gun firing action. SIMAG reconfigures the distribution and propagation of excess vibration energy and confines vibrations to certain non-critical regions or modes within a structure. Concentrated passive, active, or smart damping elements or cancellation techniques may be applied to more effectively dissipate or cancel the trapped vibrations and to prevent build up in the assembly. As the active elements, an array of collocated, PZT-based sensor- actuator sets is recommended for incorporation in SIMAG. Part of the active elements is used for spatially managing excess vibration energy while the other part is utilized for energy dissipation and cancellation. The preliminary result of our feasibility work on the SIMAG concept is demonstrated via computer simulations. It is shown that the insertion of a preliminary version of SIMAG in a 30mm gun system onboard an attack helicopter reduces the fluctuating loads and deformations measured across the helicopter bottom shell by 40 to 50 percent. SIMAG makes significant progress towards solving the firing control problems with affordable weight and power penalties by compensating for all errors in one of the two places, the turret-aircraft interface or gun barrel. Even thought the initial target application of SIMAG is airborne guns, a modified version can be incorporated into ground armors, such as tanks and humvees.

  13. Benchmarking the Integration of WAVEWATCH III Results into HAZUS-MH: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Berglund, Judith; Holland, Donald; McKellip, Rodney; Sciaudone, Jeff; Vickery, Peter; Wang, Zhanxian; Ying, Ken

    2005-01-01

    The report summarizes the results from the preliminary benchmarking activities associated with the use of WAVEWATCH III (WW3) results in the HAZUS-MH MR1 flood module. Project partner Applied Research Associates (ARA) is integrating the WW3 model into HAZUS. The current version of HAZUS-MH predicts loss estimates from hurricane-related coastal flooding by using values of surge only. Using WW3, wave setup can be included with surge. Loss estimates resulting from the use of surge-only and surge-plus-wave-setup were compared. This benchmarking study is preliminary because the HAZUS-MH MR1 flood module was under development at the time of the study. In addition, WW3 is not scheduled to be fully integrated with HAZUS-MH and available for public release until 2008.

  14. 76 FR 79655 - Honey From Argentina: Notice of Extension of Time Limit for Preliminary Results

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-22

    ... International Trade Administration Honey From Argentina: Notice of Extension of Time Limit for Preliminary... September 7, 2011, the Department extended the time limit for the preliminary results until December 1, 2011...) Seabird Argentina S.A. See Notice of Extension of Time Limit for Preliminary Results and Partial...

  15. 76 FR 76374 - Honey From Argentina: Notice of Extension of Time Limit for Preliminary Results

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-07

    ... International Trade Administration Honey From Argentina: Notice of Extension of Time Limit for Preliminary... September 7, 2011, the Department extended the time limit for the preliminary results until December ] 1... (10) Seabird Argentina S.A. See Notice of Extension of Time Limit for Preliminary Results and Partial...

  16. Nucleosynthesis of proton-rich nuclei. Experimental results on the rp-process

    NASA Astrophysics Data System (ADS)

    Galaviz, D.; Amthor, A. M.; Bazin, D.; Becerril, A. D.; Brown, B. A.; Chen, A. A.; Cole, A.; Cook, J. M.; Elliot, T.; Estrade, A.; Fülöp, Z. S.; Gade, A.; Glasmacher, T.; Heger, A.; Howard, M. E.; Kessler, R.; Lorusso, G.; Matos, M.; Montes, F.; Müller, W.; Pereira, J.; Schatz, H.; Sherrill, B.; Schertz, F.; Shimbara, Y.; Smith, E.; Smith, K.; Tamii, A.; Stolz, A.; Weisshaar, D.; Wallace, M.; Wiescher, M.; Zegers, R. G. T.

    2010-01-01

    We report in this study the nuclear properties of proton-rich isotopes located along the rp-process path. The experiments have recently been performed at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University. The level properties above the proton separation energy of the nuclei 30S, 36K and 37Ca were measured with precision of < 10 keV. This will allow a reduction in the determination of the astrophysical (p,γ) reaction rate under rp-process conditions.

  17. In situ photoimmunotherapy for melanoma: preliminary clinical results

    NASA Astrophysics Data System (ADS)

    Naylor, Mark F.; Nordquist, Robert E.; Teauge, T. Kent; Perry, Lisa A.; Chen, Wei R.

    2006-02-01

    Although melanoma accounts for only 4% of skin cancer cases, it causes 79% of all skin cancer deaths. Patients with metastatic melanoma have a poor prognosis, and long term survival is only about 5% [1, 2]. Conventional therapies such as surgery and radiation therapy usually do not cure stage III or stage IV melanoma, while traditional chemotherapy is primarily palliative. Over the last decade we have been developing new methods for treating solid tumors like melanoma, first in animal models and now in humans. We present here preliminary results from a new technique that utilizes a combination of laser stimulation and drug therapy to stimulate brisk immunological responses in cases of advanced melanoma with cutaneous metastases. A high-power, near-infrared diode laser (805 nm) is used to kill tumors in situ and a topical toll-like receptor agonist (imiquimod cream, 5%) is used to intensify the resulting immunological response. This is essentially an in situ, tumor vaccine approach to treating solid tumors.

  18. Sand transport on Mars: Preliminary results from models

    NASA Technical Reports Server (NTRS)

    Greeley, R.; Anderson, F. S.; Blumberg, D.; Lo, E.; Xu, P.; Pollack, J.

    1993-01-01

    Most studies of active aeolian processes on Mars have focused on dust, i.e., particles approximately 1 micron in diameter that are transported in suspension by wind. The presence of sand dunes on Mars indicates that larger grains (approximately greater than 60 microns, transported primarily in saltation) are also present. Although indirect evidence suggests that some dunes may be active, definitive evidence is lacking. Nonetheless, numerous studies demonstrate that sand is substantially easier to transport by wind than dust, and it is reasonable to infer that sand transportation in saltation occurs under present Martian conditions. In order to assess potential source regions, transportation pathways, and sites of deposition for sand on Mars, an iterative sand transport algorithm was developed that is based on the Mars General Circulation Model of Pollack et al. The results of the dust transport model are then compared with observed surface features, such as dune field locations observed on images, and surficial deposits as inferred from Viking IRTM observations. Preliminary results suggest that the north polar dune fields in the vicinity of 270 degrees W, 70 degrees N originated from weathered polar layered plains centered at 280 degrees W, 85 degrees N, and that Thaumasia Fossae, southern Hellas Planitia, and the area west of Hellespontus Montes are sand depositional sites. Examples of transportation 'corridors' include a westward pathway in the latitudinal band 35 degrees N to 45 degrees N, and a pathway southward from Solis Planum to Thaumasia Fossae, among others.

  19. The Myres Hill remote sensing intercomparison study: preliminary results

    NASA Astrophysics Data System (ADS)

    Clive, P. J. M.; Chindurza, I.; Ravey, I.; Bass, J.; Boyle, R. J.; Jones, P.; Lang, S. J.; Bradley, S.; Hay, L.; Oldroyd, A.; Stickland, M.

    2008-05-01

    Two remote sensing techniques (SODAR and LIDAR) have been developed for measuring wind speed and turbulence from ground level up to altitudes of 300 m or higher. Although originally developed in the defence sector, these techniques are now generating considerable interest in the renewable energy and meteorological sectors. Despite the benefits of these instruments they are not yet generally accepted for due diligence measurements by wind energy developers and financial institutions. There is a requirement for a series of independent assessments of these new metrology techniques, comparing their measurements with the approved cup-type anemometer readings. This is being addressed at TUV NEL's Myres Hill wind turbine test site in a measurement programme supported by the DIUS National Measurement Systems Measurement for Innovators scheme and a consortium of 21 industrial collaborators. Data from SODAR and LIDAR systems are being compared with results from cup-type anemometers mounted at different heights on an 80m meteorological mast. An ultrasonic sensor is also mounted on the mast. The objective of the test programme is to assess the effectiveness of SODAR and LIDAR wind speed measurement techniques under different operating regimes and atmospheric conditions. Results from the measurements will provide definitive data on the performance of the remote wind speed sensing techniques under test on complex terrain typical of many wind farm sites. Preliminary measurements based on data acquired during the initial measurement campaign are presented.

  20. Preliminary Results of ICRH on the RT-1 Magnetospheric Device

    NASA Astrophysics Data System (ADS)

    Yano, Yoshihisa; Saitoh, Haruhiko; Yoshida, Zensho; Morikawa, Junji; Fukuyama, Atsushi

    2011-10-01

    The Ring Trap-1 device, which uses a levitating super-conducting magnet, has already achieved a stable confinement of high-beta plasma (βlocal > 0 . 7) by using ECRH(Electron Cyclotron Resonance Heating). Now we are aiming to heat ions by the use of ICRH(Ion Cyclotron Resonance Heating) as a next phase of the RT-1 experiment. In the dipole configuration, the magnetic field strength (0.01-0.5 T) and the plasma density (ne ~1017m-3) are lower than in other plasma confinement devices. These features of the dipole plasma may generally result in low plasma loading impedance. Therefore we experimentally examined the loading impedance by the resonance method. In the experiment, a test antenna (φ260-300, 3 turns) was installed around the RT-1 center-stack (φ180). The RF frequency was 1 - 3 MHz and the RF input power was less than 200 mW. The observed loading impedance became higher when the RF frequency and the plasma density were increased. The maximum observed impedance was 17 Ω at 3 MHz and 0.6 Ω at 1 MHz. These dependences on the RF frequency and the plasma density agree with the preliminary calculation results. The detailed comparison between experiment and calculation will be presented.

  1. Ultrathin angioscopic guidewire: preliminary in-vitro results

    NASA Astrophysics Data System (ADS)

    Castracane, James; Conerty, Michelle D.; Breisblatt, Warren

    1995-05-01

    One significant avenue for cost containment in medical care is the application of affordable spin-off technology. Innovative methods for the efficient prevention and treatment of atherosclerotic plaques in cardiac arteries will have significant implications for reducing health care costs in a large patient population. We report on preliminary work aimed at exploiting advanced sensing, fiber optic and materials technologies to create an innovative medical instrument: the Ultrathin Angioscopic Guidewire (UAG). The UAG uses an innovative method to combine high resolution fiber optic imaging bundles with flexible guidewire extensions into a integral unit having a diameter of less than 350 microns. The UAG would serve as the guidewire over a integral unit having a diameter of less than 350 microns. The UAG would serve as the guidewire over which the treatment catheter would ride eliminating repeated removal and reinsertion of the catheter for evaluation. The resulting images are coupled to a high resolution, image intensified detector. Use of digital image capture before and after treatment combined with frame processing allows for a quantitative evaluation of lesion removal and archival data to establish treatment efficacy. Once developed, this instrument will be particularly useful in conjunction with current interventional procedures. As a diagnostic tool, the intensifier in the UAG allows for sensitive imaging for application to in vivo bio/chemiluminescent immunoassays. We will present design details and discuss proof of principle results with the first prototype UAG.

  2. Design, integration and preliminary results of the IXV Catalysis experiment

    NASA Astrophysics Data System (ADS)

    Viladegut, Alan; Panerai, F.; Chazot, O.; Pichon, T.; Bertrand, P.; Verdy, C.; Coddet, C.

    2017-06-01

    The CATalytic Experiment (CATE) is an in-flight demonstration of catalysis effects at the surface of thermal protection materials. A high-catalytic coating was applied over the baseline ceramic material on the windward side of the intermediate experimental vehicle (IXV). The temperature jump due to different catalytic activities was detected during re-entry through measurements made with near-surface thermocouples on the windward side of the vehicle. The experiment aimed at contributing to the development and validation of gas/surface interaction models for re-entry applications. The present paper summarizes the design of CATE and its integration on the windward side of the IXV. Results of a qualification campaign at the Plasmatron facility of the von Karman Institute for Fluid Dynamics are presented. They provided an experimental evidence of the temperature jump at the low-to-high catalytic interface of the heat shield under aerothermal conditions relevant to the actual IXV flight. These tests also gave confidence so that the high-catalytic patch would not endanger the integrity of the vehicle and the safety of the mission. A preliminary assessment of flight data from the thermocouple measurements shows consistency with results of the qualification tests.

  3. The GABLS4 Inter-comparison: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Bazile, E.; Couvreux, F.; Le Moigne, P.

    2015-12-01

    The GABLS4 intercomparison, launched in summer 2014, aims to study the interaction between the boundary layer and the surface in strong stability and during the diurnal transition focussing on the decrease of the turbulence. For this, the observation site of Dome C on the Antarctic Plateau was chosen mainly for two reasons: the availability of the in-situ measurements from a 45-m tower and a homogeneous surface with a low conductivity such as snow on a flat topography. The intercomparison will consist of 3 inter-comparisons : Single Column Model (SCM), Large Eddy Simulation (LES) and land-snow model (LSM). It is organized in two steps. The first one is dedicated to the LSM and the SCM with an interactive surface (snow) scheme. Then, in the second one, the observed surface temperature will be prescribed in the SCM and in the LES models. The first GABLS4 workshop was organized in May 2015 in Toulouse (France). 12 groups with LSM/SCM and 7 for LES/DNS sent already the simulations. After a brief description of the setup, the main results for the SCM intercomparison with observations and some preliminary results from the LES will be presented. The setup and more details are available on the GABLS4 Web page (http://www.cnrm.meteo.fr/aladin/meshtml/GABLS4/GABLS4.html).

  4. Design, integration and preliminary results of the IXV Catalysis experiment

    NASA Astrophysics Data System (ADS)

    Viladegut, Alan; Panerai, F.; Chazot, O.; Pichon, T.; Bertrand, P.; Verdy, C.; Coddet, C.

    2016-08-01

    The CATalytic Experiment (CATE) is an in-flight demonstration of catalysis effects at the surface of thermal protection materials. A high-catalytic coating was applied over the baseline ceramic material on the windward side of the intermediate experimental vehicle (IXV). The temperature jump due to different catalytic activities was detected during re-entry through measurements made with near-surface thermocouples on the windward side of the vehicle. The experiment aimed at contributing to the development and validation of gas/surface interaction models for re-entry applications. The present paper summarizes the design of CATE and its integration on the windward side of the IXV. Results of a qualification campaign at the Plasmatron facility of the von Karman Institute for Fluid Dynamics are presented. They provided an experimental evidence of the temperature jump at the low-to-high catalytic interface of the heat shield under aerothermal conditions relevant to the actual IXV flight. These tests also gave confidence so that the high-catalytic patch would not endanger the integrity of the vehicle and the safety of the mission. A preliminary assessment of flight data from the thermocouple measurements shows consistency with results of the qualification tests.

  5. Test results from a comparative evaluation of a condensation nuclei fire detector

    NASA Technical Reports Server (NTRS)

    Bricker, R. W.

    1985-01-01

    The fire/smoke alarm response of a condensation nuclei fire detector (CNFD) was compared with photoelectric and ionization detectors. Tests were conducted in a former control room 8.5 m by 8.9 with a 2.7 m ceiling. The room had air supplied from above the ceiling and under the floor with return air exiting from ceiling grills. The environment was varied from 278 to 305 K and relative humidities from 8 to 65%. Four detection zones were located in the room. Each zone contained a sampling head for the CNDF, a photodetector, and an ionization detector so that each detector system had four opportunities to alarm during tests. The particle level in the test room was also monitored during tests with a condensation nuclei particle counter. The CNFD responded to 90% of exposures to smoldering plastic and 84% of exposures to visible fire. The photoelectric response was 43 and 12.5% respectively for the same conditions. The ionization response was 9 and 48 respectively.

  6. The Northrop Grumman External Occulter Testbed: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Lo, Amy; Glassman, T.; Lillie, C.

    2007-05-01

    We have built a subscale testbed to demonstrate and validate the performance of the New Worlds Observer (NWO), a terrestrial planet finder external-occulter mission concept. The external occulter concept allows observations of nearby exo-Earths using two spacecraft: one carrying an occulter that is tens of meters in diameter and the other carrying a generic space telescope. The occulter is completely opaque, resembling a flower, with petals having a hypergaussian profile that enable 10-10 intensity suppression of stars that potentially harbor terrestrial planets. The baseline flight NWO system has a 30 meter occulter flying 30,000 km in front of a 4 meter class telescope. Testing the flight configuration on the ground is not feasible, so we have matched the Fresnel number of the flight configuration ( 10) using a subscale occulter. Our testbed consists of an 80 meter length evacuated tube, with a high precision occulter in the center of the tube. The occulter is 4 cm in diameter, manufactured with ¼ micron metrological accuracy and less than 2 micron tip truncation. This mimics a 30 meter occulter with millimeter figure accuracy and less than centimeter tip truncation. Our testbed is an evolving experiment, and we report here the first, preliminary, results using a single wavelength laser (532 nm) as the source.

  7. Electroencephalographic theta activity and cognition in schizophrenia: preliminary results.

    PubMed

    Wichniak, Adam; Okruszek, Łukasz; Linke, Magdalena; Jarkiewicz, Michał; Jędrasik-Styła, Małgorzata; Ciołkiewicz, Agnieszka; Wierzbicka, Aleksandra; Jernajczyk, Wojciech; Jarema, Marek

    2015-04-01

    MATRICS Consensus Cognitive Battery (MCCB) is a contemporary standard for assessment of cognitive functions in schizophrenia. The aim of the study was to examine the association between electroencephalographic spectral power and a wide range of cognitive functions measured with MCCB. Thirty-nine patients with schizophrenia (27 male, mean age 28.2 ± 5.2 years) underwent EEG recordings and were assessed with MCCB. The EEG recordings were visually inspected and manually cleaned from artifacts and subjected to spectral analysis with EEGlab. Absolute and relative power as percentage of total spectral power were computed for frequency ranges from 0.5 to 30 Hz. To compare spectral power in patients with various cognitive functioning, patients from best and worst MCCB quartiles were selected. Superior cognitive performance was associated with less power of theta waves. Six MCCB cognitive tests showed significant correlations with absolute theta power and three tests with relative theta power. The correlation coefficients between MCCB composite score and theta power were rp = -0.45 for absolute and rp = -0.36 for relative values. Increased theta power was linked especially to memory deficits. These preliminary results suggest that electroencephalographic resting state theta power is an indicator of cognitive deficit in patients with schizophrenia.

  8. Calibration Study and Preliminary Results of PRad Experiment

    NASA Astrophysics Data System (ADS)

    Levillain, Maxime; PRad Collaboration

    2016-09-01

    The latest measurements of the proton radius through muonic hydrogen Lamb shift show a discrepancy of 7 σ from a global analysis of standard hydrogen Lamb shift and elastic ep -scattering. In order to understand this proton radius puzzle, the PRad experiment successfully took in last June some elastic ep -scattering data at very low Q2 (2 .10-4 to 10-1 GeV2) with very accurate angle and energy measurements to minimize the systematic uncertainties. Before measuring the cross-sections that will be used to extract the electromagnetic form factor GE(Q2) and the proton radius, a very careful calibration of the electromagnetic calorimeter (HyCal) must be performed to get a good energy resolution and separate ep -events from M øller events especially at low angle. We will present an extended study of the electromagnetic calorimeter calibration of this experiment as well as some preliminary results on ep - and ee -scattering processes extracted from the data. The PRad experiment is supported in part by NSF MRI Award PHY-1229153.

  9. Laboratory study of corrosion of steam generator tubes: Preliminary results

    SciTech Connect

    Sala, B.; Organista, M.; Henry, K.; Erre, R.; Gelpi, A.; Cattant, F.; Dupin, M.

    1995-12-31

    The secondary side intergranular attack (IGA) and intergranular stress corrosion cracking (IGSCC) of steam generator tubes often occurs in crevices where impurities are concentrated, due to local elevated temperatures and restricted water flow. From the analysis of tubes pulled from plants, it is believed that alumino-silicates deposits and/or organic species may play a role in the development of IGA in near neutral environments. New observations suggest that similar environments and similar processes are operative inside the corroded grain boundaries. A former study using autoclave tests was mainly devoted to the formation of alumino-silicate deposits similar to those observed in plants. The present work pursued the study of local environments responsible for IGA/SC. It confirms former results on the catalytic decomposition of organic species into acetates and presents more details on the mechanism of formation of alumino-silicate deposits on alloy 600, particularly on the role of iron and, to a lesser extent, nickel cations. It was showed that, under the alumino-silicate deposits and in the presence of some organic species, a non-protective chromium rich layer may grow instead of the usual protective spinel oxide. The mechanism responsible for the formation of this layer is believed to involve interaction between iron and, to a lesser extent, nickel with silica and/or possible interaction between chromium and acetates. Preliminary capsule tests indicate that these conditions may induce the initiation of IGA.

  10. SWCX Emission from the Helium Focusing Cone - Preliminary Results

    NASA Technical Reports Server (NTRS)

    Snowden, S. L.; Kuntz, K. D.; Collier, M. R.

    2008-01-01

    Preliminary results from an XMM-Newton campaign to study solar wind charge exchange (SWCX) emission from the heliospheric focusing cone of interstellar helium are presented. The detections of enhanced O VII and O VIII emission from the cone are at the 2(sigma) and 4(sigma) levels. The solar wind charge exchange (SWCX) emission in the heliosphere not associated with distinct objects (e.g., comets and planets including exospheric material in and near Earth s magnetosheath) is proportional to the flux of the solar wind and the space density of neutral material. The neutral material originates in the interstellar medium (ISM) and passes through the solar system due to the relative motion of the Sun and the ISM. The flow of the neutral material through the solar system is strongly perturbed by the Sun both by gravity and by radiation pressure. Because of the relative radiative scattering cross sections and the effect of solar gravitation the density of interstellar hydrogen near the Sun is reduced while interstellar helium is gravitationally focused. This creates a helium focusing cone downstream of the Sun [e.g., 1, and references therein].

  11. Studying the anthropogenic radionuclides in Puerto Rico: Preliminary Result

    NASA Astrophysics Data System (ADS)

    Ithier-Guzmán, W.; Pyrtle, A. J.; Smoak, J.

    2004-12-01

    Local introduction of anthropogenic radionuclides to Puerto Rico's terrestrial and aquatic environments began in 1962 as a result of US government-sponsored research activities. Some of the earlier experiments examined the effects of radiation in tropical rainforests and the potential of superheated boiling nuclear reactor technology. More recent activities involved the use of depleted uranium during military exercises on Vieques. While the presence of radionuclides in Puerto Rico is documented, little research has been done to assess the environmental impact of this anthropogenic material. After entering Puerto Rico's environment, it is likely that some radionuclides are transported away from initial introduction sites. It is important that the distributions and behavior of radionuclides in Puerto Rico be determined. As such an investigation of this material throughout Puerto Rico was initiated. Sediment Cs-137 and Pb-210 activities, as well as ancillary geochemistry data are presented. These preliminary findings will be utilized as part of an ongoing study to determine radionuclide distributions and behaviors, with respect to aquatic geochemistry and dominant transport processes.

  12. Enhancement of perfluoropolyether boundary lubrication performance: I. Preliminary results

    NASA Technical Reports Server (NTRS)

    Jones, W. R., Jr.; Ajayi, O. O.; Goodell, A. J.; Wedeven, L. D.; Devine, E.; Premore, R. E.

    1995-01-01

    A ball bearing simulator operating under starved conditions was used to evaluate the boundary lubrication performance of a perfluoropolyether (PFPE) Krytox 143 AB. Several approaches to enhance boundary lubrication were studied. These included: (1) soluble boundary additives, (2) bearing surface modifications, (3) 'run-in' surface films, and (4) ceramic bearing components. In addition, results were compared with two non-perfluorinated liquid lubricant formulations. Based on these preliminary tests, the following tentative conclusions can be made: (1) substantial improvements in boundary lubrication performance were observed with a beta-diketone boundary additive and a tricresyl phosphate (TCP) liquid surface pretreatment; (2) the use of rough Si3N4 balls (Ra = 40 micro-in) also provided substantial improvement but with concomitant abrasive wear; (3) marginal improvements were seen with two boundary additives (a phosphine and a phosphatriazine) and a neat (100%) fluid (a carboxylic acid terminated PFPE); and surface pretreatments with a synthetic hydrocarbon, a PTFE coating, and TiC coated 440C and smooth Si3N4 balls (R(sub a) less than 1 micro-in); and (4) two non-PFPE lubricant formulations (a PAO and a synthetic hydrocarbon) yielded substantial improvements.

  13. Large co-axial pulse tube preliminary results

    NASA Astrophysics Data System (ADS)

    Emery, N.; Caughley, A.; Meier, J.; Nation, M.; Tanchon, J.; Trollier, T.; Ravex, A.

    2014-01-01

    We report that Callaghan Innovation, formally known as Industrial Research Ltd (IRL), has designed and built its largest of three high frequency single-stage co-axial pulse tubes, closely coupled to a metal diaphragm pressure wave generator (PWG). The previous pulse tube achieved 110 W of cooling power @ 77 K, with an electrical input power of 3.1 kW from a 90 cc swept volume PWG. The pulse tubes have all been tuned to operate at 50 Hz, with a mean helium working pressure of 2.5 MPa. Sage pulse tube simulation software was used to model the latest pulse tube and predicted 280 W of cooling power @ 77 K. The nominal 250 W cryocooler was designed to be an intermediate step to up-scale pulse tube technology for our 1000 cc swept-volume PWG, to provide liquefaction of gases and cooling for HTS applications. Details of the modeling, design, development and preliminary experimental results are discussed.

  14. The Canadian Meteor Orbit Radar: system overview and preliminary results

    NASA Astrophysics Data System (ADS)

    Jones, J.; Brown, P.; Ellis, K. J.; Webster, A. R.; Campbell-Brown, M.; Krzemenski, Z.; Weryk, R. J.

    2005-04-01

    This paper describes the Canadian Meteor Orbit Radar (CMOR) that has been in operation since late 2001. CMOR is a 3 station meteor radar operating at a frequency of 29.85 MHz near Tavistock, Ont. To avoid bias against fragmenting meteoroids that is inherent in the traditional multi-station method of Gill and Davies (Mon. Not. R Astron. Soc. 116 (1955) 105), we use a completely geometrical method similar to that used in the AMOR system (Quart. J. R. Astron. Soc. 35 (1994) 293) based on the interferometric determination of the echo directions and the time delays of echoes from two remote stations to obtain the trajectories and speeds of meteoroids. We describe the hardware and some of the software and present some preliminary results that provide a good indication of present capabilities of the system. Typically, we can measure 1500 individual trajectories, and hence orbits, per day with a mean accuracy of 6° in direction and about 10% in speed. A small subset of these for which it is possible to measure the speeds using Hocking's (Radio. Sci. 35 (2000) 1205) method yield speeds with a precision of about 5%. The purpose of this paper is to show that the radiants and speeds necessary for the computation of orbits are well measured rather than to discuss any orbital surveys.

  15. Intraarterial Ultrasound in Pancreatic Cancer: Feasibility Study and Preliminary Results

    SciTech Connect

    Larena-Avellaneda, Axel; Timm, Stephan; Kickuth, Ralph; Kenn, Werner; Steger, Ulrich; Jurowich, Christian; Germer, Christoph-Thomas

    2010-08-15

    Despite technological advances in computed tomography (CT) and magnetic resonance imaging, the involvement of the celiac or mesenteric artery in pancreatic cancer remains uncertain in many cases. Infiltration of these vessels is important in making decisions about therapy choices but often can only be definitively determined through laparotomy. Local (intraarterial) ultrasound may increase diagnostic accuracy. Using the Volcano intravascular ultrasound (IVUS) system, we applied a transfemoral method to scan the celiac and mesenteric arteries directly intraarterial. This technique was used in five patients with suspected pancreatic cancer. Technical success was achieved in all cases. In one case, a short dissection of the mesenteric artery occurred but could be managed interventionally. In tumors that did not contact with the vessels, IVUS was unable to display the tissue pathology. Our main interest was the infiltration of the arteries. In one case, infiltration was certain in the CT scan but uncertain in two patients. In the latter two cases, IVUS correctly predicted infiltration in one and freedom from tumor in the other case. In our preliminary study, IVUS correctly predicted arterial infiltration in all cases. IVUS did not provide new information when the tumor was far away from the vessel. Compared with IVUS in the portal vein, the information about the artery is more detailed, and the vessel approach is easier. These results encouraged us to design a prospective study to evaluate the sensitivity and specificity of this method.

  16. Auroral Spatial Structures Probe Sub-Orbital Mission Preliminary Results

    NASA Astrophysics Data System (ADS)

    Pratt, J.; Swenson, C.; Martineau, R. J.; Fish, C. S.; Conde, M.; Hampton, D.; Crowley, G.

    2015-12-01

    The NASA Auroral Spatial Structures Probe, 49.002, was launched January 28, 2015 from the Poker Flat Research Range into active aurora over the northern coast of Alaska. The primary objective of this mission was to determine the contribution of small spatial and temporal scale fluctuations of the electric fields to the larger-scale energy deposition processes associated with the aurora. The Auroral Spatial Structures Probe Sub-Orbital Mission consisted of a formation of 7 spacecraft (a main payload with 6 deployable sub-payloads) designed for multiple temporally spaced co-located measurements of electric and magnetic fields in the earth's ionosphere. The mission was able to make observations at a short time scale and small spatial scale convergence that is unobservable by either satellite or ground-based observations. The payloads included magnetometers, electric field double probes, and Langmuir probes as well as a sweeping impedance probe on the main payload. We present here preliminary results from the measurements taken that hint at the underlying spatial structure of the currents and energy deposition in the aurora. The Poynting flux derived from the observations is shown and implications are discussed in terms of the contribution of small spatial scale, rapid temporal scale fluctuations in the currents that deposit energy in the auroral region. Funding provided by NASA Grants NNX11AE23G and NNX13AN20A.

  17. Exploring a Physically Based Tool for Lightning Cessation: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Schultz, Elsie V.; Petersen, Walter A.; Carey, Lawrence D.; Buechler, Dennis E.; Gatlin, Patrick N.

    2010-01-01

    The University of Alabama in Huntsville (UAHuntsville) and NASA s Marshall Space Flight Center are collaborating with the 45th Weather Squadron (45WS) at Cape Canaveral Air Force Station (CCAFS) to enable improved nowcasting of lightning cessation. The project centers on use of dual-polarimetric radar capabilities, and in particular, the new C-band dual-polarimetric weather radar acquired by the 45WS. Special emphasis is placed on the development of a physically based operational algorithm to predict lightning cessation. While previous studies have developed statistically based lightning cessation algorithms, we believe that dual-polarimetric radar variables offer the possibility to improve existing algorithms through the inclusion of physically meaningful trends reflecting interactions between in-cloud electric fields and microphysics. Specifically, decades of polarimetric radar research using propagation differential phase has demonstrated the presence of distinct phase and ice crystal alignment signatures in the presence of strong electric fields associated with lightning. One question yet to be addressed is: To what extent can these ice-crystal alignment signatures be used to nowcast the cessation of lightning activity in a given storm? Accordingly, data from the UAHuntsville Advanced Radar for Meteorological and Operational Research (ARMOR) along with the North Alabama Lightning Mapping Array are used in this study to investigate the radar signatures present before and after lightning cessation. A summary of preliminary results will be presented.

  18. This Month in Astronomical History: Preliminary Survey Results

    NASA Astrophysics Data System (ADS)

    Wilson, Teresa

    2017-01-01

    This Month in Astronomical History is a short (~500 word) column on the AAS website that revisits significant astronomical events or the lives of people who have made a large impact on the field. The monthly column began in July 2016 at the request of the Historical Astronomical Division. Examples of topics that have been covered include Comet Shoemaker-Levy’s collision with Jupiter, the discovery of the moons of Mars, the life of Edwin Hubble, Maria Mitchell’s comet discovery, and the launch of Sputnik II. A survey concerning the column is in progress to ensure the column addresses the interests and needs of a broad readership, including historians, educators, research astronomers, and the general public. Eleven questions focus on the style and content of the column, while eight collect simple demographics. The survey has been available on the AAS website since and was mentioned in several AAS newsletters; however, non-members of AAS were also recruited to include respondents from a variety of backgrounds. Preliminary results of the survey are presented and will be used to hone the style and content of the column to serve the widest possible audience. Responses continue to be collected at: https://goo.gl/forms/Lhwl2aWJl2Vkoo7v1

  19. Spitzer IRS Spectra of Basaltic Asteroids: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Lim, Lucy F.; Emery, Joshua P.; Moskovitz, Nick; Stewart, Heather; Marchis, Frank

    2008-01-01

    We present preliminary results of a Spitzer program to observe the 5.2--38 micron spectra of small basaltic asteroids using the Spitzer IRS (Infrared Spectrograph). Our targets include members of the dynamical family of the unique large differentiated asteroid 4 Vesta ("Vestoids"), four outer-main-belt basaltic asteroids whose orbits exclude them from originating on 4 Vesta, and the basaltic near-Earth asteroid (NEA) 4055 Magellan. We will compare the compositions and thermophysical properties of the non-Vestoid objects with those of the dynamical vestoids to provide insight on the extent of metal-silicate differentiation on planetsimals during the epoch of planet formation in the early Solar System. As of this writing, spectra of asteroids 10537 (1991 RY16) and 2763 Jeans have been returned. Analysis of these data are ongolng. Observations of 956 Elisa, 2653 Principia, 4215 Kamo, 7472 Kumakiri, and 1459 Magnya have been scheduled and are expected to be available by the time of the DPS meeting. NIR spectra and lightcurves o f the target asteroids are also being observed in support of this program.

  20. Superdeformed nuclei

    SciTech Connect

    Janssens, R.V.F.; Khoo, Teng Lek.

    1991-01-01

    This paper reviews the most recent advances in the understanding of the physics of superdeformed nuclei from the point of view of the experimentalists. It covers among other subjects the following topics: (1) the discovery of a new region of superdeformed nuclei near A=190, (2) the surprising result of the occurrence of bands with identical transition energies in neighboring superdeformed nuclei near A=150 and A=190, (3) the importance of octupole degrees of freedom at large deformation and (4) the properties associated with the feeding and the decay of superdeformed bands. The text presented hereafter will appear as a contribution to the Annual Review of Nuclear and Particle Science, Volume 41. 88 refs., 11 figs.

  1. Mapping urban forest tree species using IKONOS imagery: preliminary results.

    PubMed

    Pu, Ruiliang

    2011-01-01

    A stepwise masking system with high-resolution IKONOS imagery was developed to identify and map urban forest tree species/groups in the City of Tampa, Florida, USA. The eight species/groups consist of sand live oak (Quercus geminata), laurel oak (Quercus laurifolia), live oak (Quercus virginiana), magnolia (Magnolia grandiflora), pine (species group), palm (species group), camphor (Cinnamomum camphora), and red maple (Acer rubrum). The system was implemented with soil-adjusted vegetation index (SAVI) threshold, textural information after running a low-pass filter, and brightness threshold of NIR band to separate tree canopies from non-vegetated areas from other vegetation types (e.g., grass/lawn) and to separate the tree canopies into sunlit and shadow areas. A maximum likelihood classifier was used to identify and map forest type and species. After IKONOS imagery was preprocessed, a total of nine spectral features were generated, including four spectral bands, three hue-intensity-saturation indices, one SAVI, and one texture image. The identified and mapped results were examined with independent ground survey data. The experimental results indicate that when classifying all the eight tree species/ groups with the high-resolution IKONOS image data, the identifying accuracy was very low and could not satisfy a practical application level, and when merging the eight species/groups into four major species/groups, the average accuracy is still low (average accuracy = 73%, overall accuracy = 86%, and κ = 0.76 with sunlit test samples). Such a low accuracy of identifying and mapping the urban tree species/groups is attributable to low spatial resolution IKONOS image data relative to tree crown size, to complex and variable background spectrum impact on crown spectra, and to shadow/shaded impact. The preliminary results imply that to improve the tree species identification accuracy and achieve a practical application level in urban area, multi-temporal (multi

  2. AMS results on the fluxes of light nuclei in cosmic rays

    NASA Astrophysics Data System (ADS)

    Bertucci, Bruna; AMS Collaboration

    2017-01-01

    AMS-02 is a wide acceptance high-energy physics experiment installed on the International Space Station in May 2011 and it has been operating continuously since then. AMS-02 is able to separate cosmic rays light nuclei species (1 <= Z <= 8) with contaminations less than 10-3 thanks to the redundant measurement of the particle charge in eight silicon tracker layers, four scintillator planes and the Ring Imaging Cherenkov detector. The accurate measure of their spectrum in the GeV-TeV range is performed by the magnetic spectrometer with a maximum detectable rigidity of 2-3 TV. Precise measurements from AMS will be presented, including proton, helium, boron to carbon flux ratio, and highlights of ongoing analyses discussed. On behalf of the AMS Collaboration.

  3. Preliminary results of the XR2-1 experiment

    SciTech Connect

    Gauntt, R.O.; Helmick, P.H.; Humphries, L.

    1996-03-01

    The XR2-1 (Ex-Reactor) experiment, investigating metallic core-melt relocation in boiling water reactor geometry, was performed on October 12, 1995, following two previous simpler XR1-series tests in August and November of 1993. The XR2-1 test made use of a highly detailed replication of the lower region of the BWR core, including the control blade and channel box structures, fuel rods, fuel canister nosepieces, control blade velocity limiter, and fuel support pieces, in order to investigate a key core melt progression uncertainty for BWR Station Blackout type accidents. The purpose of this experiment program is to examine the behavior of downward-draining molten metallic core materials in a severe reactor accident in a dry BWR core, and to determine conditions under which the molten materials drain out of the core region, or freeze to form blockages in the lower portion of the core. In the event that the draining metallic materials do not form stable blockages in the lower core region, and instead erode the lower core structures such as the lower core plate, then the subsequent core melt progression processes may proceed quite differently than was observed in the TMI-2 accident, with correspondingly different impact on vessel loading and vessel release behavior. The results of the Ex-Reactor tests are preliminary. All of the tests conducted have shown a significant degree of channel box destruction induced by the draining control blade materials. The XR2-1 test further showed that the draining zircaloy melt causes significant disruption of the fuel rod geometry. All of the tests have shown tendencies to form interim blockages as the melts temporarily freeze, but that these blockages re-melt, assisted by eutectic interactions, resulting in the sudden draining of accumulated metallic melt pools.

  4. Preliminary Results of the Effect of Microgravity on Seated Height

    NASA Technical Reports Server (NTRS)

    Rajulu, Sudhakar; Young, Karen; Mesloh, Miranda

    2011-01-01

    The new vehicle for future space travel to the International Space Station (ISS) and beyond will be highly dependent on the seat layout. A primary concern with the seat layout design of the new vehicle is the amount of seated height growth that occurs in space; this could cause a major accommodation issue. The design of the seats, seat layout, suit fit, and crew accommodation are all critically affected due to the increase in height that occurs in microgravity. The increase in height due to spinal elongation caused by the absence of gravity could lead to inadequate clearances that would have implications for the ability of crewmembers to return safely or to conduct nominal operations during the mission. This study was designed to reduce the risk of inadequate design of the vehicle, environment, tools, equipment, etc. (SHFE risk 2.3.1.1) and safely return crewmembers to earth from low-earth orbit travel, ISS, and beyond. In order to safely return the crewmembers, the design requirements must anticipate microgravity growth, elongation of the spine, bone and muscle loss, fluid shifts, etc. Thus, this study is to determine the amount of torso growth (spinal elongation) for a seated posture during Shuttle and ISS missions. Crewmembers seated heights were collected before, during, and after spaceflight to quantify the amount of growth that occurred as a result of microgravity. The changes in seated height will provide the designers with a design requirement which allows for change in spinal growth for a seated posture. Preliminary results have shown that , during flight, seated height increases by a range of approximately 2-6 percent compared to pre-launch seated height.

  5. Kepler K2 Precision Lightcurve Observations of Pluto: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Lisse, Casey M.; Benecchi, Susan D.; Binzel, Richard; Schwamb, Megan Elizabeth; New Horizons Science Team

    2016-10-01

    Pluto is a key object in the third zone of our Solar System and provides important insight into formation and collisional processes that were at work in the early solar system. In July 2015 the New Horizons spacecraft successfully obtained high resolution fly-by clear filter imaging observations of the Pluto system. We report on our continued monitoring of the Pluto system from October-December 2015 using the Kepler spacecraft's imaging photometer during Campaign 7 of the K2 extended mission (Howell et al. 2014). We obtained an unprecedented 83-day nearly continuous lightcurve with measurements every 30 minutes using Kepler's long cadence sampling. The result was 3,980 discrete, unresolved measurements of the combined Pluto system. The 3-month baseline allowed us to sample rotational variations and solar phase angles ranging from 1.1°-1.7° during the period of observation. This dataset is a key baseline for advancing the study of Pluto's actively evolving surface-atmosphere interaction as revealed by the surface geomorphology discovered by New Horizons. Our challenge is to gain an understanding of the ways in which Pluto's surface can be evolving as it recedes from the Sun, and of the influence of Pluto and Charon on each other. In this paper, we present our preliminary results from our K2 dataset. We describe the challenges in reducing the K2 lightcurve data for a target moving across the K2 FOV, and our progress in understanding the lightcurve's variability, which in our current reduction is due to a combination of systematics in the K2 dataset and inherent characteristics of the Pluto system's rotation and changing orbital geometry wrt the Sun and the Earth.This work was supported by NASA's K2 and New Horizons missions.

  6. Preliminary Characterization Results from the DebriSat Project

    NASA Technical Reports Server (NTRS)

    Rivero, M.; Shiotani, B.; Kleespies, J.; Toledo-Burdett, R.; Moraguez, M.; Carrasquila, M.; Fitz-Coy, N.; Liou, J.-C.; Sorge, M.; Huynh, T.

    2016-01-01

    preliminary results presented. Additionally, lessons learned from the implemented automations and their impacts on the integrity of the results are discussed.

  7. Autonomous Ozone and Aerosol Lidar Platform: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Strawbridge, K. B.

    2014-12-01

    Environment Canada is developing an autonomous tropospheric ozone and aerosol lidar system for deployment in support of short-term field studies. Tropospheric ozone and aerosols (PM10 and PM2.5) are important atmospheric constituents in low altitude pollution affecting human health and vegetation. Ozone is photo-chemically active with nitrogen oxides and can have a distinct diurnal variability. Aerosols contribute to the radiative budget, are a tracer for pollution transport, undergo complex mixing, and contribute to visibility and cloud formation. This particular instrument will employ two separate lidar transmitter and receiver assemblies. The tropospheric ozone lidar, based on the differential absorption lidar (DIAL) technique, uses the fourth harmonics of a Nd:YAG laser directed into a CO2 Raman cell to produce 276 nm, 287nm and 299 nm (first to third Stokes lines) output wavelengths. The aerosol lidar is based on the 3+2 design using a tripled Nd:YAG to output 355 nm, 532 nm and 1064nm wavelengths. Both lidars will be housed in a modified cargo trailer allowing for easy deployment to remote areas. The unit can be operated and monitored 24 hours a day via an internet link and requires an external power source. Simultaneous ozone and aerosol lidar measurements will provide the vertical context necessary to understand the complex mixing and transformation of pollutants - particularly when deployed near other ground-based in-situ sensors. Preliminary results will be shown from a summer field study at the Centre For Atmospheric Research Experiments (CARE).

  8. COSMIC EVOLUTION OF DUST IN GALAXIES: METHODS AND PRELIMINARY RESULTS

    SciTech Connect

    Bekki, Kenji

    2015-02-01

    We investigate the redshift (z) evolution of dust mass and abundance, their dependences on initial conditions of galaxy formation, and physical correlations between dust, gas, and stellar contents at different z based on our original chemodynamical simulations of galaxy formation with dust growth and destruction. In this preliminary investigation, we first determine the reasonable ranges of the most important two parameters for dust evolution, i.e., the timescales of dust growth and destruction, by comparing the observed and simulated dust mass and abundances and molecular hydrogen (H{sub 2}) content of the Galaxy. We then investigate the z-evolution of dust-to-gas ratios (D), H{sub 2} gas fraction (f{sub H{sub 2}}), and gas-phase chemical abundances (e.g., A {sub O} = 12 + log (O/H)) in the simulated disk and dwarf galaxies. The principal results are as follows. Both D and f{sub H{sub 2}} can rapidly increase during the early dissipative formation of galactic disks (z ∼ 2-3), and the z-evolution of these depends on initial mass densities, spin parameters, and masses of galaxies. The observed A {sub O}-D relation can be qualitatively reproduced, but the simulated dispersion of D at a given A {sub O} is smaller. The simulated galaxies with larger total dust masses show larger H{sub 2} and stellar masses and higher f{sub H{sub 2}}. Disk galaxies show negative radial gradients of D and the gradients are steeper for more massive galaxies. The observed evolution of dust masses and dust-to-stellar-mass ratios between z = 0 and 0.4 cannot be reproduced so well by the simulated disks. Very extended dusty gaseous halos can be formed during hierarchical buildup of disk galaxies. Dust-to-metal ratios (i.e., dust-depletion levels) are different within a single galaxy and between different galaxies at different z.

  9. Environment modelling in near Earth space: Preliminary LDEF results

    NASA Technical Reports Server (NTRS)

    Coombs, C. R.; Atkinson, D. R.; Wagner, J. D.; Crowell, L. B.; Allbrooks, M.; Watts, A. J.

    1992-01-01

    Hypervelocity impacts by space debris cause not only local cratering or penetrations, but also cause large areas of damage in coated, painted or laminated surfaces. Features examined in these analyses display interesting morphological characteristics, commonly exhibiting a concentric ringed appearance. Virtually all features greater than 0.2 mm in diameter possess a spall zone in which all of the paint was removed from the aluminum surface. These spall zones vary in size from approximately 2 - 5 crater diameters. The actual craters in the aluminum substrate vary from central pits without raised rims, to morphologies more typical of craters formed in aluminum under hypervelocity laboratory conditions for the larger features. Most features also possess what is referred to as a 'shock zone' as well. These zones vary in size from approximately 1 - 20 crater diameters. In most cases, only the outer-most layer of paint was affected by this impact related phenomenon. Several impacts possess ridge-like structures encircling the area in which this outer-most paint layer was removed. In many ways, such features resemble the lunar impact basins, but on an extremely reduced scale. Overall, there were no noticeable penetrations, bulges or spallation features on the backside of the tray. On Row 12, approximately 85 degrees from the leading edge (RAM direction), there was approximately one impact per 15 cm(exp 2). On the trailing edge, there was approximately one impact per 72 cm(exp 2). Currently, craters on four aluminum experiment trays from Bay E09, directly on the leading edge are being measured and analyzed. Preliminary results have produced more than 2200 craters on approximately 1500 cm(exp 2) - or approximately 1 impact per 0.7 cm(exp 2).

  10. MR elastography of the breast:preliminary clinical results.

    PubMed

    Lorenzen, J; Sinkus, R; Lorenzen, M; Dargatz, M; Leussler, C; Röschmann, P; Adam, G

    2002-07-01

    Imaging of breast tumors and various breast tissues using magnetic resonance (MR) elastography (MRE) to explore the potential of elasticity as a new parameter for the diagnosis of breast lesions. Low-frequency mechanical waves are transmitted into breast tissue by means of an oscillator. The local characteristics of the mechanical wave are determined by the underlying elastic properties of the tissue. Theses waves can be displayed by means of a motion-sensitive spin-echo MR sequence within the phase of the MR image. Elasticity reconstruction is performed on the basis of 8 "snapshots" of each wave within the three spatial directions. We performed in-vivo measurements in 15 female patients with malignant tumors of the breast, 5 patients with benign breast tumors, and 15 healthy volunteers. Malignant invasive breast tumors documented the highest values of elasticity with a median of 15.9 kPa and a wide range of stiffnesses between 8 and 28 kPa. In contrast, benign breast lesions represented low values of elasticity, which were significantly different from malignant breast tumors (median elasticity: 7.0 kPa; p = 0.0012). This was comparable to the stiffest tissue areas in healthy volunteers (median elasticity 7.0 kPa), whereas breast parenchyma (median: 2.5 kPa) and fatty breast tissue (median: 1.7 kPa) showed the lowest values of elasticity. Two invasive ductal carcinomas had elasticity values of 8 kPa and two stiff parenchyma areas in healthy volunteers had elasticities of 13 and 15 kPa. These lesions could not be differentiated by their elasticity. We conclude that MRE is a promising new imaging modality with the capability to assess the viscoelastic properties of breast tumors and the surrounding tissues. However, from our preliminary results in a small number of patients it is obvious that there is an overlap in the elasticity ranges of soft malignant tumors and stiff benign lesions.

  11. Fireball of 30 May 2017 over NE Italy: Preliminary results

    NASA Astrophysics Data System (ADS)

    Stomeo, Enrico; Eltri, Maurizio

    2017-03-01

    A big fireball has been observed in Northern Italy at 21h09m22s UT on 30 May 2017. The fireball was registered by 3 video cameras of the Italian Meteor Group and observed by many visual people. The preliminary trajectory above the area between Romagna and Veneto regions was calculated.

  12. Preliminary Results from a Mercury Dry Deposition Measurement Methods Intercomparison

    NASA Astrophysics Data System (ADS)

    Marsik, F. J.; Brooks, S.; Gustin, M. S.; Holsen, T.; Landis, M.; Prestbo, E. M.; Poissant, L.

    2009-12-01

    Over the past fifteen years, a number of intensive field campaigns and measurement networks have provided valuable information on the estimated rates of mercury wet deposition to sensitive ecosystems throughout the world. In contrast, the ability to place bounds on the rates of mercury dry deposition has been hampered by the relative lack of direct measurements of this process. Recently, a number of researchers have performed measurements of mercury dry deposition using a variety of direct and indirect measurement techniques. While these studies have provided important information regarding the potential rates of mercury dry deposition to natural surfaces, little is known about the comparability of the results utilizing these different measurement approaches. During the month of August 2008, a mercury dry deposition measurement methods comparison was conducted in Ann Arbor, Michigan over a nine-day period. Seven research groups participated in the study, with the following measurement approaches: water, cation exchange membrane, chemically treated filter and turf surrogate surfaces; and several micrometeorological modeling methods. Continuous monitoring was conducted for ambient meteorological conditions and elemental, oxidized and particulate mercury concentrations. Preliminary results suggest that study-average mercury dry deposition estimates ranged from 0.17 to 0.59 ng/m2/hour for the group of pure-water surrogate surfaces, the cation exchange membrane and a micrometeorological flux gradient approach. The turf surrogate surface, BrCl spiked-water surface and a gold-coated quartz fiber filter surface resulted in significantly higher mercury dry deposition estimates, with the latter two approaches having been designed to measure total mercury dry deposition. Given that the turf surrogate surface and the cation exchange membrane samplers were designed for long-term deployment (up to one week), these methods were deployed for an additional series of four one

  13. Boreal Summer ISO hindcast experiment: preliminary results from SNU

    NASA Astrophysics Data System (ADS)

    Heo, S.; Kang, I.; Kim, D.; Ham, Y.

    2010-12-01

    As a part of internationally coordinated research program, hindcast experiments with focus on boreal summer intraseasonal oscillation (ISO) have been done in Seoul National University (SNU). This study aims to show preliminary results from SNU’s efforts. The ISO prediction system used in the hindcast experiment consists of SNU coupled model and SNU initialization method. The SNU coupled model is an ocean-atmosphere coupled model which couples the SNU Atmospheric GCM (SNU AGCM) to the Modular Ocean Model ver.2.2 (MOM2.2) Ocean GCM developed at Geophysical Fluid Dynamics Laboratory (GFDL). In the SNU initialization method, both atmospheric and oceanic states are nudged toward reanalysis data (ERAinterim and GODAS) before prediction starting date. For the results here, 2 ensemble members are generated by using different nudging period, 8 and 9 days, respectively. The initial dates of 45-day predictions are the 1st, 11th, 21st of months during boreal summer season (May to October). Prediction skills and its dependency on the initial amplitude, the initial phase, and the number of ensemble members are investigated using the Real-time Multivariate MJO (RMM) index suggested by Wheeler and Hendon (2004). It is shown in our hindcast experiment that, after 13 forecast lead days (the forecast skill is about 0.7), the prediction skill does not depend on the strength of the initial state. Also, we found that the prediction skill has a phase dependency. The prediction skill is particularly low when the convective center related to the MJO is over the Indian Ocean (phase 2). The ensemble prediction has more improved correlation skill than each member. To better understand the phase dependency, we compared the observed and predicted behavior of the MJO that propagates from different starting phases. The phase speed of the prediction is slower than the observation. The MJO in the hindcast experiment propagates with weaker amplitudes than observed except for initial phase 3. Also

  14. Mycodiversity in marine sediments contaminated by heavy metals: preliminary results

    NASA Astrophysics Data System (ADS)

    Zotti, Mirca; Carbone, Cristina; Cecchi, Grazia; Consani, Sirio; Cutroneo, Laura; Di Piazza, Simone; Gabutto, Giacomo; Greco, Giuseppe; Vagge, Greta; Capello, Marco

    2016-04-01

    .6 CFU per gram of sediments. The maximum value of 11 CFU g-1 has been recorded in two stations (off the Sestri Levante Tombolo), while the minimum value has been recorded closer to the coast. As concern qualitative results, the most recurrent genera are Aspergillus and Penicillium. These data confirm the occurrence of a mycobiota in these heavy metal contaminated sediments. Our preliminary results are a first contribution to the knowledge of presence of microfungi in marine sediments, and propel us to increase our research in order to find out new organisms for bioremediation purpose.

  15. PRODUCTION OF A PRELIMINARY QUALITY CONTROL PIPELINE FOR SINGLE NUCLEI RNA-SEQ AND ITS APPLICATION IN THE ANALYSIS OF CELL TYPE DIVERSITY OF POST-MORTEM HUMAN BRAIN NEOCORTEX.

    PubMed

    Aevermann, Brian; McCorrison, Jamison; Venepally, Pratap; Hodge, Rebecca; Bakken, Trygve; Miller, Jeremy; Novotny, Mark; Tran, Danny N; Diezfuertes, Francisco; Christiansen, Lena; Zhang, Fan; Steemers, Frank; Lasken, Roger S; Lein, E D; Schork, Nicholas; Scheuermann, Richard H

    2016-01-01

    Next generation sequencing of the RNA content of single cells or single nuclei (sc/nRNA-seq) has become a powerful approach to understand the cellular complexity and diversity of multicellular organisms and environmental ecosystems. However, the fact that the procedure begins with a relatively small amount of starting material, thereby pushing the limits of the laboratory procedures required, dictates that careful approaches for sample quality control (QC) are essential to reduce the impact of technical noise and sample bias in downstream analysis applications. Here we present a preliminary framework for sample level quality control that is based on the collection of a series of quantitative laboratory and data metrics that are used as features for the construction of QC classification models using random forest machine learning approaches. We've applied this initial framework to a dataset comprised of 2272 single nuclei RNA-seq results and determined that ~79% of samples were of high quality. Removal of the poor quality samples from downstream analysis was found to improve the cell type clustering results. In addition, this approach identified quantitative features related to the proportion of unique or duplicate reads and the proportion of reads remaining after quality trimming as useful features for pass/fail classification. The construction and use of classification models for the identification of poor quality samples provides for an objective and scalable approach to sc/nRNA-seq quality control.

  16. PRODUCTION OF A PRELIMINARY QUALITY CONTROL PIPELINE FOR SINGLE NUCLEI RNA-SEQ AND ITS APPLICATION IN THE ANALYSIS OF CELL TYPE DIVERSITY OF POST-MORTEM HUMAN BRAIN NEOCORTEX

    PubMed Central

    Aevermann, Brian; McCorrison, Jamison; Venepally, Pratap; Hodge, Rebecca; Bakken, Trygve; Miller, Jeremy; Novotny, Mark; Tran, Danny N.; Diez-Fuertes, Francisco; Christiansen, Lena; Zhang, Fan; Steemers, Frank; Lasken, Roger S.; Lein, Ed; Schork, Nicholas; Scheuermann, Richard H.

    2016-01-01

    Next generation sequencing of the RNA content of single cells or single nuclei (sc/nRNA-seq) has become a powerful approach to understand the cellular complexity and diversity of multicellular organisms and environmental ecosystems. However, the fact that the procedure begins with a relatively small amount of starting material, thereby pushing the limits of the laboratory procedures required, dictates that careful approaches for sample quality control (QC) are essential to reduce the impact of technical noise and sample bias in downstream analysis applications. Here we present a preliminary framework for sample level quality control that is based on the collection of a series of quantitative laboratory and data metrics that are used as features for the construction of QC classification models using random forest machine learning approaches. We’ve applied this initial framework to a dataset comprised of 2272 single nuclei RNA-seq results and determined that ~79% of samples were of high quality. Removal of the poor quality samples from downstream analysis was found to improve the cell type clustering results. In addition, this approach identified quantitative features related to the proportion of unique or duplicate reads and the proportion of reads remaining after quality trimming as useful features for pass/fail classification. The construction and use of classification models for the identification of poor quality samples provides for an objective and scalable approach to sc/nRNA-seq quality control. PMID:27897007

  17. Equation of state and compressional behaviour of edingtonite: preliminary results.

    NASA Astrophysics Data System (ADS)

    Gatta, G. D.; Boffa Ballaran, T.; Comodi, P.; Zanazzi, P. F.

    2003-04-01

    Edingtonite is Ba-zeolite, belonging to the fibrous zeolites group. Its chemical composition is approximately BaAl_2Si_3O10\\cdot4H_2O. The crystal framework is based on Secondary Building Unit (SBU), constituted by four-member tetrahedral rings joined by a fifth tetrahedron to form [100]-chains (topological symmetry Ioverline{4} 2_1m). The framework is characterized by two systems of channels: 8-ring channels along [110] and 8-ring channels along [001]. Orthorhombic edingtonites arise due to Si/Al-ordering, whereas Si/Al-disorder increases the symmetry to tetragonal. The extraframework cations and water molecules lay in the [001]-channels: the Ba atoms are located in the center of the channels and are coordinated to six framework oxygens and four water molecules. The baric behaviour of tetragonal edingtonite from Ice River (Canada) was investigated by X-ray single-crystal diffraction with a BGI diamond anvil cell using glycerol as a non-penetrating pressure medium and quartz as pressure calibrant. Cell volume data were fitted using a second order Birch-Murnaghan Equation of State, as suggested by finite strain - stress plot (f-F_e plot). The preliminary results are: V_0= 601.5(3) Å^3 and K_0= 61(2) GPa, with K'=4 . The axial compressibility values, obtained fitting the lattice data with a second order "linearized" Murnaghan Equation of State, are: β_a = β_b=1.86(7)\\cdot10-2 GPa-1, β_c = 1.27(5)\\cdot 10-2 GPa-1 (β_a : β_b: β_c =1.46 : 1.46 :1). No phase transition has been observed up to 2.2 GPa. The evolution of the crystal structure with P was studied by comparing the results of refinements done with data collected at different pressures. The main deformation mechanism is the polyhedral tilting that produced inter-tetrahedral angle variations. In particular, the relevant structural variations are produced by cooperative rotation of the SBUs along [100]. This mechanism produces an increase in the ellipticity of the [100]-channel. Similar behaviour has

  18. Toward DNA-based facial composites: preliminary results and validation.

    PubMed

    Claes, Peter; Hill, Harold; Shriver, Mark D

    2014-11-01

    The potential of constructing useful DNA-based facial composites is forensically of great interest. Given the significant identity information coded in the human face these predictions could help investigations out of an impasse. Although, there is substantial evidence that much of the total variation in facial features is genetically mediated, the discovery of which genes and gene variants underlie normal facial variation has been hampered primarily by the multipartite nature of facial variation. Traditionally, such physical complexity is simplified by simple scalar measurements defined a priori, such as nose or mouth width or alternatively using dimensionality reduction techniques such as principal component analysis where each principal coordinate is then treated as a scalar trait. However, as shown in previous and related work, a more impartial and systematic approach to modeling facial morphology is available and can facilitate both the gene discovery steps, as we recently showed, and DNA-based facial composite construction, as we show here. We first use genomic ancestry and sex to create a base-face, which is simply an average sex and ancestry matched face. Subsequently, the effects of 24 individual SNPs that have been shown to have significant effects on facial variation are overlaid on the base-face forming the predicted-face in a process akin to a photomontage or image blending. We next evaluate the accuracy of predicted faces using cross-validation. Physical accuracy of the facial predictions either locally in particular parts of the face or in terms of overall similarity is mainly determined by sex and genomic ancestry. The SNP-effects maintain the physical accuracy while significantly increasing the distinctiveness of the facial predictions, which would be expected to reduce false positives in perceptual identification tasks. To the best of our knowledge this is the first effort at generating facial composites from DNA and the results are preliminary

  19. Preliminary Results from an Hydroacoustic Experiment in the Indian Ocean

    NASA Astrophysics Data System (ADS)

    Royer, J.; Dziak, R. P.; Delatre, M.; Brachet, C.; Haxel, J. H.; Matsumoto, H.; Goslin, J.; Brandon, V.; Bohnenstiehl, D. R.; Guinet, C.; Samaran, F.

    2008-12-01

    We report initial results from a 14-month hydroacoustic experiment in the Indian Ocean conducted by CNRS/University of Brest and NOAA/Oregon State University. The objective was to monitor the low-level seismic activity associated with the three contrasting spreading ridges and deforming zones in the Indian Ocean. Three autonomous hydrophones, moored in the SOFAR channel, were deployed in October 2006 and recovered early 2008 by R/V Marion Dufresne, in the Madagascar Basin, and northeast and southwest of Amsterdam Island, complementing the two permanent hydroacoustic stations of the Comprehensive nuclear-Test-Ban Treaty Organization (CTBTO) located near Diego Garcia Island and off Cape Leeuwin. Our temporary network detected more than 2000 events. Inside the array, we located 592 events (compared to 49 in the NEIC earthquake catalog) with location errors less than 5 km and time error less than 2s. The hydrophone array detected on average 5 to 40 times more events per month than land-based networks. First-order observations indicate that hydroacoustic seismicity along the Southeast Indian ridge (SEIR) occurs predominantly along the transform faults. The Southwest Indian Ridge exhibits some periodicity in earthquake activity between adjacent ridge segments. Two large tectonic/volcanic earthquake swarms are observed along the Central Indian Ridge (near the triple junction) in September and December 2007. Moreover, many off ridge-axis events are also observed both south and north of the SEIR axis. Improved localization using the CTBTO records will help refine these preliminary results and further investigate extended volcanic sequences along the SEIR east of 80°E and other events outside of the temporary array. The records also display numerous vocalizations of baleen whales in the 20-40Hz bandwidth. The calls are attributed to fin whales, Antarctic blue whales and pygmy blue whales of Madagascar and Australian type. Their vocal activity is found to be highly seasonal

  20. Ab initio results for intermediate-mass, open-shell nuclei

    NASA Astrophysics Data System (ADS)

    Baker, Robert B.; Dytrych, Tomas; Launey, Kristina D.; Draayer, Jerry P.

    2017-01-01

    A theoretical understanding of nuclei in the intermediate-mass region is vital to astrophysical models, especially for nucleosynthesis. Here, we employ the ab initio symmetry-adapted no-core shell model (SA-NCSM) in an effort to push first-principle calculations across the sd-shell region. The ab initio SA-NCSM's advantages come from its ability to control the growth of model spaces by including only physically relevant subspaces, which allows us to explore ultra-large model spaces beyond the reach of other methods. We report on calculations for 19Ne and 20Ne up through 13 harmonic oscillator shells using realistic interactions and discuss the underlying structure as well as implications for various astrophysical reactions. This work was supported by the U.S. NSF (OCI-0904874 and ACI -1516338) and the U.S. DOE (DE-SC0005248), and also benefitted from the Blue Waters sustained-petascale computing project and high performance computing resources provided by LSU.

  1. Fluorine Diffusion in Titanite: Preliminary Results from Experiments

    NASA Astrophysics Data System (ADS)

    Berds, M. L.; Price, J. D.; Cherniak, D. J.

    2008-12-01

    Recent experiments have yielded new data on fluorine-hydroxyl diffusion in titanite. Experiments utilized natural low-F titanite crystals, sectioned into wafers, polished to 1 μm alpha alumina and finished with colloidal silica. Prepared crystals were placed with polished faces in contact with a F-rich diffusion source. Each titanite-source assembly was then sealed in an evacuated Si glass ampoule and heated to temperatures between 600 and 900 °C, or sealed in an Ag envelope and heated in a cold-seal pressure vessel to temperatures between 600 and 906 °C at 50 to 100 kPa. Several F sources were employed: PbF, NaF, CaF2, LiF, and fluoroapatite. PbF and NaF strongly reacted with the titanite crystals and their capsules, particularly at higher temperatures. CaF2 and LiF were less destructive, but reacted with and etched the titanite faces, precluding analysis. Titanite retained a polished and largely unaltered surface only in those runs with an apatite source. We noted only a slight change in color (green to brown, likely due to oxidation of minor amounts of Fe present in the titanite) in these runs. We analyzed the polished faces of crystals from successful experiments using nuclear reaction analysis (NRA), employing the 340 keV resonance for the nuclear reaction 19F(p,αγ) 16O to measure fluorine. The results show elevated fluorine at the surface and diminishing concentrations with depth. Fitting a simple complementary error function to each concentration profile yields a diffusivity, assuming a model of a semi-infinite material with a surface maintained at constant concentration. For the runs at near atmospheric pressure, diffusion coefficients of 2×10-21m2/s and 6×10-21m2/s are obtained at temperatures of 850°C and 889°C, respectively. A single cold seal experiment at 906°C suggests a diffusivity of 3×10-21 m2/s. While preliminary, these data suggest that fluorine-hydroxyl exchange in titanite is more sluggish than in apatite, biotite, and tremolite.

  2. Preliminary Results from the PYTHON Microwave Background Anisotropy Experiment

    NASA Astrophysics Data System (ADS)

    Dragovan, M.; Ruhl, J.; Novak, G.; Platt, S. R.; Crone, B.; Pernic, R.

    1993-05-01

    We will present preliminary results of our experiment to measure the anisotropy of the microwave background on medium (2.75 degree) angular scales. Observations of 14 separate regions (two rows of seven regions) on the sky were made during the 15 day period of 1 Jan to 15 Jan 1993. The observing site, the geographic South Pole, is an ideal location for microwave background anisotropy studies where long integration times, low sky background (10K at 90GHz), and stable atmospheric conditions are required. The geometric advantage of the Pole is that a patch of sky never rises or sets, allowing 24 hour observations of the patch with no corrections required for changes in elevation. Approximately 100 hours of usable data were obtained during this time. The instrument is a five channel bolometer array, with the detectors operating at 50 mK, cooled by a hybrid (3) He-Adiabatic demagnetization refrigerator. There are four pixels in the focal plane arranged in a square grid so that the angular separation between pixels on the sky is 2.75 degrees. The fifth channel is a dark channel acting as a monitor for extraneous noise or pickup. Individual pixels consist of corrugated feedhorns coupled to waveguide waffle filters combined with glass and plastics to define the high frequency cutoff (110 GHz); the low frequency cutoff is determined by the cutoff of the waveguide (75 GHz). The band was selected for minimal expected contributions from foreground sources such as free-free, synchrotron and cool dust. This detector system is coupled to the sky via a 0.75m off axis parabolic primary. A gradient free 3-beam switching pattern on the sky is obtained by moving a low moment of inertia flat plate quickly (15 msec transition time, with 85 msec spent integrating on the point) between 3 points on the sky. The plate is oriented vertically so the switching is at constant elevation. This work was supported by The Center for Astrophysics in Antarctica, PYI grant NSF AST-9057089 and the James

  3. Mapping the contours of the Local bubble: preliminary results

    NASA Astrophysics Data System (ADS)

    Sfeir, D. M.; Lallement, R.; Crifo, F.; Welsh, B. Y.

    1999-06-01

    We present preliminary results from a long-term program of mapping the neutral absorption characteristics of the local interstellar medium, taking advantage of Hipparcos stellar distances. Equivalent widths of the NaI D-line doublet at 5890 Å are presented for the lines-of-sight towards some 143 new target stars lying within 300 pc of the Sun. Using these data which were obtained at the Observatoire de Haute Provence, together with previously published NaI absorption measurements towards a further 313 nearby targets, we present absorption maps of the distribution of neutral gas in the local interstellar medium as viewed from 3 different galactic projections. In particular, these maps reveal the Local Bubble region as a low neutral density interstellar cavity in the galactic plane with radii between 65-250 pc that is surrounded by a (dense) neutral gas boundary (or ``wall''). We have compared our iso-column contours with the contours derived by Snowden et al. (\\cite{snowden98}) using ROSAT soft X-ray emission data. Consistency in the global dimensions derived for both sets of contours is found for the case of a million degree hot LB plasma of emissivity 0.0023 cm(-6) pc with an electron density of 0.005 cm(-2) . We have detected only one relatively dense accumulation of cold, neutral gas within 60 pc of the Sun that surrounds the star delta Cyg, and note that the nearest molecular cloud complex of MBM 12 probably resides at the very edge of the Local Bubble at a distance of ~ 90 pc. Our observations may also explain the very different physical properties of the columns of interstellar gas in the line-of-sight to the two hot stars epsilon CMa and beta CMa as being due to their locations with respect to the Bubble contours. Finally, in the meridian plane the LB cavity is found to be elongated perpendicularly to the Gould's Belt plane, possibly being ``squeezed'' by the expanding shells of the Sco-Cen and Perseus-Taurus OB associations. Tables 1 and 2 are also

  4. Some Preliminary Scientific Results of Chang'E-3 Mission

    NASA Astrophysics Data System (ADS)

    Zou, Y.; Li, W.; Zheng, Y.; Li, H.

    2015-12-01

    Chang'E-3 mission is the main task of Phase two of China Lunar Exploration Program (CLEP), and also is Chinese first probe of landing, working and roving on the moon. Chang'E-3 craft composed of a lander and a rover, and each of them carry four scientific payloads respectively. The landing site of Chang'E-3 was located at 44.12 degrees north latitude and 19.51 degrees west longitude, where is in the northern part of Imbrium Which the distance in its west direction from the landing site of former Soviet probe Luna-17 is about 400 km, and about 780km far from the landing site of Appolo-17 in its southeast direction. Unfortunately, after a series of scientific tests and exploration on the surface of the moon, the motor controller communication of the rover emerged a breakdown on January 16, 2014, which leaded the four payloads onboard the rover can't obtain data anymore. However, we have received some interesting scientific data which have been studied by Chinese scientists. During the landing process of Chang'E-3, the Landing camera got total 4673 images with the Resolution in millimeters to meters, and the lander and rover took pictures for each other at different point with Topography camera and Panoramic camera. We can find characteristic changes in celestial brightness with time by analyzing image data from Lunar-based Ultraviolet Telescope (LUT) and an unprecedented constraint on water content in the sunlit lunar exosphere seen by LUT). The figure observed by EUV camera (EUVC) shows that there is a transient weak area of the Earth's plasma sphere; This event took place about three hours. The scientists think that it might be related to the change of the particle density of mid-latitude ionosphere. The preliminary spectral and mineralogical results from the landing site are derived according to the data of Visible and Near-infrared Imaging Spectrometer (VNIS). Seven major elements including Mg, Al, Si, K, Ca, Ti and Fe have been identified by the Active Particle

  5. Preliminary meteorological results for 1992 West Coast Scotland Experiment

    SciTech Connect

    Robey, H.F.

    1993-01-04

    This memo documents preliminary meteorological results from the 1992 West Coast Scotland Experiment, a joint US/UK radar ocean imaging experiment. Measurements of wind speed and direction are reported for both phases of the experiment covering the periods from June 7--13 and from June 19--25. The measurements were obtained using a Campbell Scientific CR10 Datalogger and R. M. Young model 03001-5 anemometer and wind wane. The anemometer has a resolution of 0.1 m/s and the wind vane 1[degrees], but motion of the ship platform reduces the precision of the direction measurements to [+-]10[degrees]. Data were downloaded to an IBM PC-AT for final storage and analysis. The anemometer was mounted at a height of 10 meters above the mean water surface on top of a mast located at the bow of the Royal Marine Auxiliary Service (R.M.A.S.) tug, [open quotes]Cairn[close quotes]. The Cairn was moored at the center of the experiment site at 57[degrees]7.13755[close quote] N, 5[degrees]44.88521[close quote] W in the Sound of Sleat. nominally 200 meters from the ship track. Wind velocity and direction were recorded at a sample rate of 0.2 Hz, and the averaged value was output every 10 minutes from approximately 2 hours before the start of the first run to 2 hours after the end of the last run. Data are plotted in the following pages in 2 formats for a quick visual summary of the daily wind conditions. The top plot gives wind velocity (m/s) and direction (degrees true) vs. time given in minutes relative to the start of the first run which is designated as [open quotes]T[close quotes]. The lower plot gives a polar plot of the same data with velocity on the radial axis and direction on the azimuthal axis. The final two plots give a summary of the wind speed vs. direction for phase 1 (June 7--13) and phase 2 (June 19--25).

  6. Preliminary results of the PREFER FP7 Project

    NASA Astrophysics Data System (ADS)

    Fusilli, Lorenzo; Laneve, Giovanni; De Bonis, Roberto; Sebastian, Ana; Ferrucci, Fabrizio; Oliveira, Sandra

    2014-05-01

    The need to improve the information and intelligence support for forest fire prevention is widely recognized. Fire prevention is still the most cost-effective strategy when compared to firefighting and extinguishing that are costly, local, and triggered only in response to already ongoing crises. PREFER project, funded under the EU FP7 (G.A. 312931), intends to contribute at responding to such a pragmatic need of southern Europe's forests by: providing timely information products based on the exploitation of all available spacecraft sensors, offering a portfolio of products focused on pre- and post-crisis forest fire emergency, suitable for the users in the different countries of the European Mediterranean area. The PREFER Service portfolio consists of two main services: 1. Information Support to Fire Preparedness/Prevention Phase" (ISP) Service 2. Information Support to Fire Recovery/Reconstruction Phase" (ISR) Service This service is already at an advanced stage having completed the first year of activity. During this time several products have been consolidated: seasonal fuel maps; daily and seasonal fire hazard maps; seasonal risk maps; prescribed fire maps. This paper aims at presenting the preliminary results of the research activity carried out in the framework of the PREFER project, focusing, in particular, on these recalled above. As for Fire Risk and Hazard assessment, many indexes have been developed in the last years. Hardly any of them uses data derived from satellite images. The FPI index is an exception to this rule which, in addition, makes use of meteorological data. In spite of being a very complete index, the FPI still allows room for improvement which justify the interest of PREFER in it. PREFER's innovative approach to FPI will allow taking into account the effect of solar illumination conditions in determining the humidity present in the dead vegetation, and therefore its proneness to burn. PREFER innovation also focus in allowing the index to

  7. Preliminary Results to Support Evidence of Thermospheric Contraction

    NASA Astrophysics Data System (ADS)

    Saunders, A.; Swinerd, G.; Lewis, H.

    Atmospheric density has an important influence in predicting the positions of satellites in low Earth orbit. For long-term predictions of satellite ephemerides, any density trend in the thermosphere would be a valuable input, not only to satellite operators, but also to studies of the future low Earth orbit environment in terms of space debris. A secular thermospheric density trend has not yet been definitively proven but predictions by Ramesh and Roble [1], along with evidence by Emmert et al. [2], strongly suggest the existence of such a phenomenon. With the ultimate goal of deriving a long-term empirical model of thermospheric cooling and contraction, the primary focus of this paper is to present preliminary results obtained to support the existing evidence for such a thermospheric contraction. There are many ways of determining atmospheric density, but inferring thermospheric density from satellite drag data is a relatively cost-effective way of gathering in-situ measurements. Given an initial satellite orbit, one approach is to use an orbital propagator to predict the satellite's state at some time ahead and then to compare that state with Two-Line Element (TLE) data at the same epoch. The difference between the semi-major axis of the satellite from the initial orbit and that after the orbit propagation is then integrated to obtain an estimate of global average density. This is the approach adopted in our new work, using a bespoke, orbital propagator that includes perturbations due to atmospheric drag, gravitational anomalies, luni-solar gravity effects and solar radiation pressure. The methods used to derive precise estimates of the ballistic coefficient of each satellite for use in the propagator are outlined, as this information is not contained explicitly in the TLE sets. In validation of the orbital propagator used in this study, Saunders et al. [3] ran simulations to predict satellite re-entry dates with satisfactory results. Now, historical satellite

  8. Preliminary palaeoseismological results from the Kaparelli fault (Central Greece)

    NASA Astrophysics Data System (ADS)

    Pavlides, S.; Koukouvelas, I.; Ganas, A.; Kokkalas, S.; Tsodoulos, I.; Stamatopoulos, L.; Goyntromichou, C.; Valkaniotis, S.

    2003-04-01

    The roughly E-W trending Kaparelli-Plataees Fault is an on-shore normal fault segment located at the eastern end of the Gulf of Corinth Rift. The fault is a segment of the greater Plataees-Avlon fault zone (Beotia-Attica). It was activated during the third event of the February- March 1981 Alkyonides seismic sequence (Ms 6.7; 6.6; 6.4). The ground offset was 70cm, although some values of more than 1m have been reported too. The slip vector was 200-220 o/60-70 o (azimuth, rake). This presentation is a brief account of our efforts to search the seismic history and to resolve slip of the Kaparelli normal fault, in terms of trenching techniques, tectonostratigraphy of fault-related colluvial deposits and dating palaeoevents. Three (3) trenches have been excavated across the 1981 fault trace during May-June 2002. They are oriented perpendicular to the fault strike, and are located in Holocene deformed sediments (colluvium), in contact with bedrock limestone. Trenches have lengths of 15 to 30 m and depths of 2-4 m and their walls were mapped in scale 1:20. The KAP1 comprises a sequence of clay, sand, colluvial wedges and soil. In this trench the last (1981) event is clearly shown within a greater fault zone of 3m width. The hangingwall block of the reactivated fault strand during the 1981 event comprises a strongly rotated (>60o) sedimentary sequence corresponding with cumulative fault deformation. KAP2 and KAP3 trenches constitute of typical colluvium (unconsolidated angular limestone fragments and soil), which includes occasionaly tile fragments, some charcoal and pottery fragments. We have identified at least three (3) seismic events based on a) colluvium tectonostratigraphy mainly, b) deposition of sedimentary layers, c)formation of soil, and d) small displacement of few horizons. Although previous works have suggested that the fault was activated approximately 3 times during the last 20 ka years and remained quiet for 10 ka years our preliminary results from the

  9. Preliminary results on the conversion of laser energy into electricity

    NASA Technical Reports Server (NTRS)

    Thompson, R. W.; Manista, E. J.; Alger, D. L.

    1978-01-01

    A preliminary experiment was performed to investigate conversion of 10.6 micron laser energy to electrical energy via a laser-sustained argon plasma. Short-circuit currents of 0.7 A were measured between a thoriated-tungsten emitter and collector electrodes immersed in the laser-sustained argon plasma. Open-circuit voltages of about 1.5 V were inferred from the current-voltage load characteristics. The dominant mechanism of laser energy conversion is uncertain at this time. Much higher output powers appear possible.

  10. Optical scattering (TAOS) by tire debris particles: preliminary results

    NASA Astrophysics Data System (ADS)

    Crosta, Giovanni F.; Camatini, Marina C.; Zomer, Simeone; Holler, Stephen; Pan, Yongle; Bhaskara, Praveena; Muangchareon, Pongphisanu; Sung, Changmo; Cencetti, Simone; Regazzoni, Claudia

    2001-03-01

    Tire debris particles from low severity laboratory wear tests have been investigated by the TAOS optical scattering facility at Yale University. The incident wavelength is 532 nm. After the TAOS event some particle samples have been imaged by a scanning electron microscope and microanalyzed. The TAOS intensity patterns recorded within a solid angle in the backward sector have been processed by cluster analysis and compared with the patterns computed by a T-matrix code. Preliminary agreement has been found between TAOS data and the particle models (size, shape, refractive index). The purpose of the investigation is to obtain signatures of the material, based on its TAOS pattern.

  11. Optical scattering (TAOS) by tire debris particles: preliminary results.

    PubMed

    Crosta, G; Camatini, M; Zomer, S; Holler, S; Pan, Y; Bhaskara, P; Muangchareon, P; Sung, C; Cencetti, S; Regazzoni, C

    2001-03-12

    Tire debris particles from low severity laboratory wear tests have been investigated by the TAOS optical scattering facility at Yale University. The incident wavelength is 532 nm. After the TAOS event some particle samples have been imaged by a scanning electron microscope and microanalyzed. The TAOS intensity patterns recorded within a solid angle in the backward sector have been processed by cluster analysis and compared with the patterns computed by a T-matrix code. Preliminary agreement has been found between TAOS data and the particle models (size, shape, refractive index). The purpose of the investigation is to obtain signatures of the material, based on its TAOS pattern.

  12. Preliminary results on the conversion of laser energy into electricity

    NASA Technical Reports Server (NTRS)

    Thompson, R. W.; Manista, E. J.; Alger, D. L.

    1978-01-01

    A preliminary experiment was performed to investigate conversion of 10.6 micron laser energy to electrical energy via a laser-sustained argon plasma. Short-circuit currents of 0.7 A were measured between a thoriated-tungsten emitter and collector electrodes immersed in the laser-sustained argon plasma. Open-circuit voltages of about 1.5 V were inferred from the current-voltage load characteristics. The dominant mechanism of laser energy conversion is uncertain at this time. Much higher output powers appear possible.

  13. Arterial surgery for sporadic hemiplegic migraine: preliminary results.

    PubMed

    Shevel, Elliot

    2014-05-01

    My aim was to report for the first time (to my knowledge) the successful treatment of 3 patients with sporadic hemiplegic migraine by surgical cautery of terminal branches of the external carotid artery under conscious sedation. Since the operations (between 1 and 2 years) none of the patients have had further attacks of migraine or hemiplegia. This preliminary report suggests that for patients with sporadic hemiplegic migraine with a confirmed arterial component, surgical cautery of selected terminal branches of the external carotid artery may be effective treatment. Copyright © 2014 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  14. CALAS: Carpathian laser strainmeter: a project and preliminary results

    NASA Astrophysics Data System (ADS)

    Garoi, F.; Apostol, D.; Damian, V.; Logofătu, P. C.; Ioniţă, B. F.; Lazar, J.; Molesini, G.; Papadopoulos, T.; Ionescu, C.; Ţugui, Andreea

    2008-06-01

    A laser strainmeter for in-situ monitoring of an important actively seismic area of Europe, namely Vrancea region in Romania is proposed. Six groups from four different countries (Romania, Czech Republic, Italy and Greece) with various areas of expertise (e.g. geophysics, lasers, optics, interferometry, and mechanics) are involved in order to sustain the complexity of the project. This paper presents some preliminary laboratory experiments related to measuring relative displacements with a stable interferometer. Displacements of the order of tens to hundreds of nanometers (80 to 285 nm) were measured with uncertainty of +/-1 nm. A computer algorithm was used to process the interferograms.

  15. Experimental Studies of Ion Beam Neutralization: Preliminary Results

    SciTech Connect

    Ding, N.; Polansky, J.; Downey, R.; Wang, J.

    2011-05-20

    A testing platform is designed to study ion beam neutralization in the mesothermal, collisionless region. In the experimental setup, argon neutrals were ionized in a microwave cavity and accelerated by a plasma lens system which was biased to 2500 V above the system ground. Electrons were boiled off from two hot tungsten filaments to neutralize the ion beam. The plasma is diagnosed using Langmuir probe and Faraday probe. A 3-D traversing system and a complete data acquisition loop were developed to efficiently measure 3-D beam profile. Preliminary measurements of beam profiles are presented for different operating conditions.

  16. 76 FR 66903 - Steel Wire Garment Hangers From the People's Republic of China: Preliminary Results and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-28

    ... Results and Preliminary Rescission, in Part, of the Second Antidumping Duty Administrative Review AGENCY... Department of Commerce (``Department'') is conducting the second administrative review of steel wire garment...'') by the respondent. If these preliminary results are adopted in our final results of this review,...

  17. Paleomagnetic dating of ferricretes in New Caledonia. Preliminary results.

    NASA Astrophysics Data System (ADS)

    Sevin, Brice; Ricordel-Prognon, Caroline; Quesnel, Florence; Cluzel, Dominique; Maurizot, Pierre; Robineau, Bernard

    2010-05-01

    Although the description of the emplacement (Cluzel et al., 2001) and the weathering (Trescases, 1975; Latham, 1986; Chevillotte et al., 2006) of the New Caledonia peridotites is well documented in the literature, the knowledge and the age of formation of the landsurfaces formed upon the ultrabasic massifs are poorly documented. Several surfaces have been recognised along the island but no reliable ages could be attributed to the associated regolith. In fact, the overthrust of the Ophiolitic Nappe in the South is stratigraphically constrained by a younger autochthonous olistostrom dated by Late Priabonian pelagic foraminifera (Cluzel et al., 1998). The supergene weathering being still active, the beginning of the ferruginisation of the various plateaux is not well constrained and estimated to have occurred between 34 Ma and Actual. The processes of absolute dating are not relevant to these weathering profiles (K-Mn oxides are poorly concentrated). Ferricretes and various ferruginous materials have the potential to record the ancient geomagnetic field providing means of age determination. In tropical soils, most of the primary remanence carring minerals are dissolved during weathering and secondary magnetic minerals, such as goethite and haematite, are formed in situ acquiring a crystallisation (or chemical) remanent magnetization (CRM). The paleomagnetic pole recovered by demagnetizing the CRMs are plotted on the local apparent polar wandering (APWP) reference curve providing an age for the different parts of the paleoweathering profiles. The data and interpretations we present here are based on paleomagnetic analysis of ferricretes of Goro and Tiebaghi. The preliminary results suggest, for the first time ever, well constrained ages between 20 and 25 Ma of major ferruginisation stages of the peridotites of New Caledonia. References Chevillotte V., Chardon D., Beauvais A, Maurizot P. & Colin F. (2006). Long-term tropical morphogenesis of New Caledonia (Southwest

  18. 71 FR 67850 - Honey From Argentina: Preliminary Results of New Shipper Review

    Federal Register 2010, 2011, 2012, 2013, 2014

    2006-11-24

    ... International Trade Administration Honey From Argentina: Preliminary Results of New Shipper Review AGENCY...) is conducting a new shipper review of the antidumping order of honey from Argentina. The period of... the case of sales of honey from Argentina from Patagonik. If these preliminary results are adopted...

  19. 78 FR 77651 - Seamless Refined Copper Pipe and Tube From Mexico: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-24

    ... International Trade Administration Seamless Refined Copper Pipe and Tube From Mexico: Preliminary Results of... refined copper pipe and tube from Mexico.\\1\\ The review covers two producers/ exporters of the subject... are invited to comment on these preliminary results. \\1\\ See Seamless Refined Copper Pipe and...

  20. Preliminary results of the trapped atom clock on a chip.

    PubMed

    Lacroute, Clement; Reinhard, Friedemann; Ramirez-Martinez, Fernando; Deutsch, Christian; Schneider, Tobias; Reichel, Jakob; Rosenbusch, Peter

    2010-01-01

    We present an atomic clock based on the interrogation of magnetically trapped (87)Rb atoms. Two photons, in the microwave and radiofrequency domain, excite the clock transition. At a magnetic field of 3.23 G the clock transition from |F = 1, m(F) = -1> to |F = 2, m(F) = 1> is 1st-order insensitive to magnetic field variations. Ramsey interrogation times longer than 2 s can be achieved, leading to a projected clock stability in the low 10(-13) at 1 s for a cloud of 10(5) atoms. We use an atom chip to cool and trap the atoms. A coplanar waveguide is integrated to the chip to carry the Ramsey interrogation signal, making the physics package as small as (5 cm)(3). We describe the experimental setup and show preliminary Ramsey fringes of line width 1.25 Hz.

  1. Preliminary Results of the Extreme Ultraviolet Explorer Right Angle Program

    NASA Astrophysics Data System (ADS)

    McDonald, K.; Craig, N.; Sirk, M. M.; Drake, J. J.; Malina, R. F.

    1993-12-01

    During the guest observer phase of the EUVE Mission, data are being collected with the survey scanners and the Deep Survey Scanner. The EUVE Right Angle Program (RAP) involves the analysis of this data set and the coordination of possible simultaneous observations with ground based instruments. This data set consists of several discrete pointings performed at a much deeper level than the previous EUVE all-sky survey, although covering only a few percent of the sky. Analysis of this data set has detected a large number of previously undetected EUV sources. We present here a preliminary list of the sources observed during the EUVE Right Angle Program and compare properties of this list with properties of the EUVE Bright Source List. This work has been supported by NASA contract NAS5--30180.

  2. Preliminary Results on Lunar Interior Properties from the GRAIL Mission

    NASA Technical Reports Server (NTRS)

    Williams, James G.; Konopliv, Alexander S.; Asmar, Sami W.; Lemoine, H. Jay; Melosh, H. Jay; Neumann, Gregory A.; Phillips, Roger J.; Smith, David E.; Solomon, Sean C.; Watkins, Michael M.; Wieczorek, Mark A.; Zuber, Maria T.; Andrews-Hanna, Jeffrey C.; Head, James W.; Kiefer, Walter S.; Matsuyama, Isamu; McGovern, Patrick J.; Nimmo, Francis; Weber, Renee C.; Boggs, D. H.; Goossens, Sander J.; Kruizinga, Gerhard L.; Mazarico, Erwan; Park, Ryan S.; Yuan, Dah-Ning

    2013-01-01

    The Gravity Recovery and Interior Laboratory (GRAIL) mission has provided lunar gravity with unprecedented accuracy and resolution. GRAIL has produced a high-resolution map of the lunar gravity field while also determining tidal response. We present the latest gravity field solution and its preliminary implications for the Moon's interior structure, exploring properties such as the mean density, moment of inertia of the solid Moon, and tidal potential Love number k2. Lunar structure includes a thin crust, a deep mantle, a fluid core, and a suspected solid inner core. An accurate Love number mainly improves knowledge of the fluid core and deep mantle. In the future GRAIL will search for evidence of tidal dissipation and a solid inner core.

  3. Seismic Hazard Maps for the Maltese Archipelago: Preliminary Results

    NASA Astrophysics Data System (ADS)

    D'Amico, S.; Panzera, F.; Galea, P. M.

    2013-12-01

    The Maltese islands form an archipelago of three major islands lying in the Sicily channel at about 140 km south of Sicily and 300 km north of Libya. So far very few investigations have been carried out on seismicity around the Maltese islands and no maps of seismic hazard for the archipelago are available. Assessing the seismic hazard for the region is currently of prime interest for the near-future development of industrial and touristic facilities as well as for urban expansion. A culture of seismic risk awareness has never really been developed in the country, and the public perception is that the islands are relatively safe, and that any earthquake phenomena are mild and infrequent. However, the Archipelago has been struck by several moderate/large events. Although recent constructions of a certain structural and strategic importance have been built according to high engineering standards, the same probably cannot be said for all residential buildings, many higher than 3 storeys, which have mushroomed rapidly in recent years. Such buildings are mostly of unreinforced masonry, with heavy concrete floor slabs, which are known to be highly vulnerable to even moderate ground shaking. We can surely state that in this context planning and design should be based on available national hazard maps. Unfortunately, these kinds of maps are not available for the Maltese islands. In this paper we attempt to compute a first and preliminary probabilistic seismic hazard assessment of the Maltese islands in terms of Peak Ground Acceleration (PGA) and Spectral Acceleration (SA) at different periods. Seismic hazard has been computed using the Esteva-Cornell (1968) approach which is the most widely utilized probabilistic method. It is a zone-dependent approach: seismotectonic and geological data are used coupled with earthquake catalogues to identify seismogenic zones within which earthquakes occur at certain rates. Therefore the earthquake catalogues can be reduced to the

  4. 78 FR 7395 - Stainless Steel Bar From India: Preliminary Results of Antidumping Duty Administrative Review...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-01

    ... International Trade Administration Stainless Steel Bar From India: Preliminary Results of Antidumping Duty... the antidumping duty order on stainless steel bar (SSB) from India. The period of review (POR) is... Review: Stainless Steel Bar from India'' dated concurrently with this notice (``Preliminary...

  5. 75 FR 39207 - Purified Carboxymethylcellulose From Finland: Extension of Time Limit for Preliminary Results of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-08

    ... International Trade Administration Purified Carboxymethylcellulose From Finland: Extension of Time Limit for... 30, 2010. See Purified Carboxymethylcellulose From Finland: Extension of Time Limit for Preliminary... Time Limits for Preliminary Results Section 751(a)(3)(A) of the Tariff Act of 1930, as amended (the Act...

  6. Annoyance Caused by Propeller Airplane Flyover Noise: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Mccurdy, D. A.; Powell, C. A.

    1981-01-01

    The annoyance response of people to the noise of propeller airplane flyovers was examined. The specific items of interest were: (1) the annoyance prediction ability of current noise metrics; (2) the effect of tone corrections on prediction ability; (3) the effect of duration corrections on prediction ability; and (4) the effect of 'critical band' corrections on the prediction ability of perceived noise level. Preliminary analyses of the data obtained from two experiments are presented. The first experiment examined 11 propeller airplanes with maximum takeoff weights greater than or equal to 5700 kg. The second experiment examined 14 propeller airplanes weighting 5700 kg or less. Also included in each experiment were five different commercial service jet airplanes. Each airplane noise was presented at D-weighted sound pressure levels of 70, 80, and 90 dB to subjects in a testing room which simulates the outdoor acoustic environment. Subjects judged 108 stimuli in the first experiment and 132 stimuli in the second experiment. Perceived noise level predicted annoyance better than A, D, or E-weighted sound pressure level. Corrections for tones greater than of equal to 500 Hz generally improved prediction ability for the heavier propeller airplanes.

  7. Immersive virtual environment for visuo-vestibular therapy: preliminary results.

    PubMed

    Gascuel, J D; Payno, H; Schmerber, S; Martin, O

    2012-01-01

    The sense of equilibrium aggregates several interacting cues. On vestibular areflexic patients, vision plays a major role. We developed an immersive therapeutic platform, based on 3D opto-kinetic stimulation that enables to tune the difficulty of the balance task by managing the type of optic flow and its speed. The balance adjustments are recorded by a force plate, quantified by the length of the center of pressure trajectory and detection of disequilibrium corrections (leans, compensation step). Preliminary analysis shows that (i) patients report a strong immersion feeling in the motion flow, triggering intense motor response to "fight against fall"; (ii) the ANOVA factorial design shows a significant effect of flow speed, session number and gaze anchor impact. In conclusion, this study shows that 3D immersive stimulation removes essential limits of traditional opto-kinetic stimulators (limited 2D motions and remaining fixed background cues). Moreover, the immersive optic flow stimulation is an efficient tool to induce balance adaptive reactions in vestibular patients. Hence, such a platform appears to be a powerful therapeutic tool for training and relearning of balance control processes.

  8. WISE/NEOWISE OBSERVATIONS OF THE HILDA POPULATION: PRELIMINARY RESULTS

    SciTech Connect

    Grav, T.; Mainzer, A. K.; Bauer, J.; Masiero, J.; Eisenhardt, P. R.; Blauvelt, E.; DeBaun, E.; Elsbury, D.; Gautier, T.; Gomillion, S.; Hand, E.; Wilkins, A.; Spahr, T.; McMillan, R. S.; Walker, R.; Cutri, R.; Wright, E.

    2012-01-10

    We present the preliminary analysis of 1023 known asteroids in the Hilda region of the solar system observed by the NEOWISE component of the Wide-field Infrared Survey Explorer (WISE). The sizes of the Hildas observed range from {approx}3 to 200 km. We find no size-albedo dependency as reported by other projects. The albedos of our sample are low, with a weighted mean value of p{sub V} = 0.055 {+-} 0.018, for all sizes sampled by the NEOWISE survey. We observed a significant fraction of the objects in the two known collisional families in the Hilda population. It is found that the Hilda collisional family is brighter, with a weighted mean albedo of p{sub V} = 0.061 {+-} 0.011, than the general population and dominated by D-type asteroids, while the Schubart collisional family is darker, with a weighted mean albedo of p{sub V} = 0.039 {+-} 0.013. Using the reflected sunlight in the two shortest WISE bandpasses, we are able to derive a method for taxonomic classification of {approx}10% of the Hildas detected in the NEOWISE survey. For the Hildas with diameter larger than 30 km, there are 67{sup +7}{sub -15}% D-type asteroids and 26{sup +17}{sub -5%} C-/P-type asteroids (with the majority of these being P-types).

  9. Preliminary results of a computerized Placido disk surgical corneal topographer

    NASA Astrophysics Data System (ADS)

    Carvalho, Luis A.; Tonissi, S. A.; Castro, Jarbas C.

    1999-06-01

    We have developed a novel instrument for computerized corneal topography during surgery. The instrument measures a region of approximately 7 mm in diameter, providing the surgeon with precise values of power and astigmatism. The system is based on a Placido Disc projecting system, which is attached to the objective lens of the surgical microscope. The Placido Disc pattern is reflected by a 50% beam splitter attached to the body of the microscope. At the beam splitter we installed our home-made adaptor and a CCD monochromatic high resolution camera. A high quality frame grabber is installed on a PC and images are digitized at a 480x640 resolution. Algorithms based on image processing techniques were implemented for edge detection of pattern. Calibrating curves based on 4 spherical surfaces were generated and approximately 3600 points were calculated for each exam. Preliminary measurements on 10 healthy corneas were compared with the measurements made on an EyeSys Corneal Topographer. Mean deviation was 0.05 for radius of curvature, 0.24 D for power and 5 degrees for cylinder. This system, with some improvements, may be successfully used to diminish high post surgical astigmatisms in surgeries such as cataract and corneal transplant. This system could also be used to gather preoperative data in corneal topography assisted LASIK.

  10. Tropical Atlantic wind field variations during sequal: Preliminary results

    NASA Astrophysics Data System (ADS)

    Harrison, D. E.; Cardone, Vincent J.

    An evaluation of the U.S. Navy NOGAPS surface wind product is made to establish its utility as an initial descriptor of the surface wind field in the tropical Atlantic during SEQUAL. In this preliminary study, NOGAPS synoptic fields are compared to synoptic ship reports, and to winds measured at three separate stations along the equator during SEQUAL I. At least within 20° of the equator the comparisons suggest that the mean monthly surface winds from NOGAPS almost always differ by less than 2 m/s from averages of surface wind observations, and can be less than 1 m/s. Similar comparisons are also found from daily mean winds derived from NOGAPS, along the equator near 30°W. A comparison of NOGAPS monthly mean winds with 100-year climatology of merchant ship reports suggests that the major surface wind anomaly during SEQUAL I in the tropical Atlantic occurred in March and April 1983 along the equator west of 30°W.

  11. Cassini Observations of Saturn's Magnetotail Region: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Sittler, E. C.; Arridge, C.; Rymer, A.; Coates, A.; Krupp, N.; Blanc, M.; Richardson, J.; Andre, N.; Thomsen, M.; Tokar, R. L.; hide

    2007-01-01

    Using Cassini thermal plasma, hot plasma and magnetic field observations for several intervals between the dawn meridian of Saturn's outer magnetosphere and Saturn's magnetotail region, we investigate the structure of the magnetotail, plasma and magnetic field properties within tail-like current sheet regions and ion flows within the magnetotail regions. We use Cassini Plasma Spectrometer (CAPS) Ion Mass Spectrometer (IMS), Electron Plasma Spectrometer (ELS) observations, MIMI LEMMS ion and electron observations and Cassini magnetometer data (MAG) to characterize the plasma environment. IMS observations are used to measure plasma flow velocities from which one can infer rotation versus convective flows. IMS composition measurements are used to trace the source of plasma from the inner magnetosphere (protons, H2+ and water group ions) versus an external solar wind source (protons and e +i+on s). A critical parameter for both models is the strength of the convection electric field with respect to the rotational electric field for the large scale magnetosphere. For example, are there significant return flows (i.e., negative radial velocities, VR < 0) and/or plasmoids (V(sub R) > 0) within the magnetotail region? Initial preliminary evidence of such out flows and return flows was presented by Sittler et al. This talk complements the more global analysis by McAndrews et al.

  12. Genesis Silicon Carbide Concentrator Target 60003 Preliminary Ellipsometry Mapping Results

    NASA Technical Reports Server (NTRS)

    Calaway, M. J.; Rodriquez, M. C.; Stansbery, E. K.

    2007-01-01

    The Genesis concentrator was custom designed to focus solar wind ions primarily for terrestrial isotopic analysis of O-17/O-16 and O-18/O-16 to +/-1%, N-15/N-14 to +/-1%, and secondarily to conduct elemental and isotopic analysis of Li, Be, and B. The circular 6.2 cm diameter concentrator target holder was comprised of four quadrants of highly pure semiconductor materials that included one amorphous diamond-like carbon, one C-13 diamond, and two silicon carbide (SiC). The amorphous diamond-like carbon quadrant was fractured upon impact at Utah Test and Training Range (UTTR), but the remaining three quadrants survived fully intact and all four quadrants hold an important collection of solar wind. The quadrants were removed from the target holder at NASA Johnso n Space Center Genesis Curation Laboratory in April 2005, and have been housed in stainless steel containers under continual nitrogen purge since time of disintegration. In preparation for allocation of a silicon carbide target for oxygen isotope analyses at UCLA, the two SiC targets were photographed for preliminary inspection of macro particle contamination from the hard non-nominal landing as well as characterized by spectroscopic ellipsometry to evaluate thin film contamination. This report is focused on Genesis SiC target sample number 60003.

  13. Preliminary results of large-actuator-count MEMS DM development

    NASA Astrophysics Data System (ADS)

    Helmbrecht, Michael A.; He, Min; Rhodes, Patrick; Kempf, Carl J.

    2010-02-01

    Compensating for atmospheric turbulence in meter-class telescopes and for free-space communications can require deformable mirrors (DM) with hundreds of actuators. Advances in high-contrast imaging techniques and increased telescope sizes require DMs mirrors with thousands of actuators [1]-[3]. In response to these needs, Iris AO has been developing a nearly 500-actuator DM and is conducting pathfinding research into 3000-actuator class DMs. This paper begins with an overview of the segmented DM design and describes improvements made to the DM over the prior year in the areas of speed, high-quality dielectric coatings, and snap-in prevention structures. The paper then describes the next-generation PTT489 DM design and fabrication process. Failure modes encountered during fabrication are presented as well as test methods to detect the failure modes. Preliminary yield data are presented for the fabrication process as well. The paper concludes with a view to the future showing pathfinding research into 3000-actuator DMs.

  14. [Colorectal cancer screening programme in Aragon (Spain): preliminary results].

    PubMed

    Solé Llop, Mª Esther; Cano Del Pozo, Mabel; García Montero, José-Ignacio; Carrera-Lasfuentes, Patricia; Lanas, Ángel

    2017-08-04

    To describe preliminary findings from the colorectal cancer screening programme in Aragon (Spain) to evaluate its implementation. We have collected data from the first year of the program (2014) based on faecal occult blood immunochemical (FOBTi) test in patients 60-69 years old. We report "indicators" defined by the "Red Nacional de Cribado". Invited population after exclusions: 12,518. Program participation rate: 45.28% (95%CI: 44.41-46.15). Inadequate tests: 0.21% (95%CI: 0.12-0.37); positive FOBTi test 10.75% (95%CI: 9.97-11.58) and colonoscopy acceptance 95.07% (95%CI: 93.04-96.52). Colonoscopy was appropriate and complete in 97.58% (95%CI: 95.98-98.55) of cases. The high- and low-risk adenoma detection rates were 14.7‰ (95%CI: 11.9-18.2) and 5.55‰ (95%CI: 3.9-7.8) respectively. The positive predictive value for any adenoma was 58.55% (95%CI: 54.49-62.49) and for invasive cancer was 5.36% (95%CI: 3.8-7.51). The indicator analysis of the ongoing programme suggests the programme is being implemented correctly in our community. Copyright © 2017 SESPAS. Publicado por Elsevier España, S.L.U. All rights reserved.

  15. Cassini Observations of Saturn's Magnetotail Region: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Sittler, E. C.; Arridge, C.; Rymer, A.; Coates, A.; Krupp, N.; Blanc, M.; Richardson, J.; Andre, N.; Thomsen, M.; Tokar, R. L.; McAndrews, H. J.; Henderson, Mike; Cooper, J. F.; Burger, M.; Simpson, D.; Khurana, K. K.; Russell, C.; Dougherty, M.; Young, D. T.

    2007-01-01

    Using Cassini thermal plasma, hot plasma and magnetic field observations for several intervals between the dawn meridian of Saturn's outer magnetosphere and Saturn's magnetotail region, we investigate the structure of the magnetotail, plasma and magnetic field properties within tail-like current sheet regions and ion flows within the magnetotail regions. We use Cassini Plasma Spectrometer (CAPS) Ion Mass Spectrometer (IMS), Electron Plasma Spectrometer (ELS) observations, MIMI LEMMS ion and electron observations and Cassini magnetometer data (MAG) to characterize the plasma environment. IMS observations are used to measure plasma flow velocities from which one can infer rotation versus convective flows. IMS composition measurements are used to trace the source of plasma from the inner magnetosphere (protons, H2+ and water group ions) versus an external solar wind source (protons and e +i+on s). A critical parameter for both models is the strength of the convection electric field with respect to the rotational electric field for the large scale magnetosphere. For example, are there significant return flows (i.e., negative radial velocities, VR < 0) and/or plasmoids (V(sub R) > 0) within the magnetotail region? Initial preliminary evidence of such out flows and return flows was presented by Sittler et al. This talk complements the more global analysis by McAndrews et al.

  16. Evidence for Symplectic Symmetry in AbInitio No-Core Shell Model Results for Light Nuclei

    NASA Astrophysics Data System (ADS)

    Dytrych, Tomáš; Sviratcheva, Kristina D.; Bahri, Chairul; Draayer, Jerry P.; Vary, James P.

    2007-04-01

    Clear evidence for symplectic symmetry in low-lying states of C12 and O16 is reported. Eigenstates of C12 and O16, determined within the framework of the no-core shell model using the J-matrix inverse scattering potential with A≤16 (JISP16) nucleon-nucleon (NN) realistic interaction, typically project at the 85% 90% level onto a few of the most deformed symplectic basis states that span only a small fraction of the full model space. The results are nearly independent of whether the bare or renormalized effective interactions are used in the analysis. The outcome confirms Elliott’s SU(3) model which underpins the symplectic scheme, and above all, points to the relevance of a symplectic no-core shell model that can reproduce experimental B(E2) values without effective charges as well as deformed spatial modes associated with clustering phenomena in nuclei.

  17. Dissolution of Oxygen Precipitate Nuclei in n-Type CZ-Si Wafers to Improve Their Material Quality: Experimental Results

    SciTech Connect

    Sopori, Bhushan; Basnyat, Prakash; Devayajanam, Srinivas; Tan, Teh; Upadhyaya, Ajay; Tate, Keith; Rohatgi, Ajeet; Xu, Han

    2017-01-01

    We present experimental results which show that oxygen-related precipitate nuclei (OPN) present in p-doped, n-type, Czochralski wafers can be dissolved using a flash-annealing process, yielding very high quality wafers for high-efficiency solar cells. Flash annealing consists of heating a wafer in an optical furnace to temperature between 1150 and 1250 degrees C for a short time. This process produces a large increase in the minority carrier lifetime (MCLT) and homogenizes each wafer. We have tested wafers from different axial locations of two ingots. All wafers reach nearly the same high value of MCLT. The OPN dissolution is confirmed by oxygen analysis using Fourier transform infrared spectra and injection-level dependence of MCLT.

  18. Composition and Distribution of Northern Hellas Massifs: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Phillips, M. S.; Viviano-Beck, C. E.

    2016-12-01

    Martian plagioclase-rich deposits have been detected from orbit in the visible, near infrared and infrared wavelengths, and in-situ at Gale crater; however, the exact nature and origin of these deposits are not fully understood. Interpreted lithologies include felsic granitoid deposits, anorthosites, and plag-phyric basalts. The Noachian Hilly/Massif units near the northern rim of Hellas are the most areally-extensive region containing plagioclase-rich deposits identified thus far. We use morphological, spectral and thermal data from the Context Camera, Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), and Thermal Emission Imaging Spectrometer (THEMIS) to consider the distribution and composition of massif features and subsequent implications for their origin. The spatial density of the massif features decreases with radial distance from Hellas, suggesting these features may be related to the Hellas impact event. If the massif features are uplifted or excavated material, they could represent pre-Noachian primary crustal lithologies. The primary compositions associated with the massifs as seen in the CRISM data are plagioclase, orthopyroxene, and olivine. Preliminary analyses suggest a tentative trend in compositions, with plagioclase-rich massifs closer to the basin and more olivine- and orthopyroxene-rich massifs further from the basin. This compositional trend could reveal a pre-Hellas-impact stratigraphy in the local primary crust. Further mapping and characterization are required to constrain the composition and distribution of massifs and determine their origin. We intend to use THEMIS spectral data to corroborate CRISM spectral identifications and to further constrain the compositions of the massif features. Identification of anorthositic rocks excavated from depth would have significant implications for the petrology of a primary crust on Mars and could support a magma ocean hypothesis similar to that suggested for the moon.

  19. Preliminary Results on Sediment Sorting Under Intense Bedload Transport

    NASA Astrophysics Data System (ADS)

    Hernandez Moreira, R. R.; Vautin, D.; Mathews, S. L.; Kuprenas, R.; Viparelli, E.

    2014-12-01

    Previous experiments show that parallel-laminated deposits are emplaced under upper plane bed regime by the migration of small-amplitude, long-wavelength bedforms. The present research focuses on how sediment is sorted under upper plane bed and sheet flow transport regimes, and whether parallel-lamination is inhibited during sheet flow transport. The problem of studying the sorting of sediment under so intense transport conditions is plagued by the uncertainties related to flow resistances and bedload transport rates. We simplify the problem by first running the experiments with uniform sediment, to establish a baseline that will aid in the design of the experiments with poorly sorted material. We are running experiments at the Hydraulics Laboratory of the Department of Civil and Environmental Engineering at the University of South Carolina in Columbia, in a unidirectional sediment-feed flume, 9 meters long by 0.2 meters wide, of which 7 meters are used as test section. During the experiments, water surface and bed elevations are periodically measured to characterize the global parameters of the flow, e.g. mean flow velocity and bed shear stress. When the flow and the sediment transport reach conditions of mobile bed equilibrium, bed elevation fluctuations are measured with ultrasonic transducer systems at six fixed locations. Channel bed aggradation is then induced by slowly raising the tail gate of the flume such that there is no change in transport regime, as confirmed by additional measurements of water surface and bed elevation and bed elevation fluctuations. Preliminary observations under upper plane bed regime show the formation of the small-amplitude and long-wavelength bedforms, as well as hints of parallel lamination in the deposits. In the near future we aim to achieve sheet flow transport conditions with both uniform and non-uniform grain size distributions to look at the internal structure of the emplaced deposit.

  20. Assessing Seasonal Lake Dynamics in Arctic Alaska: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Hinkel, K. M.; Beck, R. A.; Healey, N.; Jones, S.; Lenters, J.; Lyons, E. A.; Shah, C. A.; Sheng, Y.; Smith, L. C.; Winston, B. S.; Jones, B. M.

    2008-12-01

    Lakes on the coastal plain of arctic Alaska have developed atop continuous permafrost. Recent research suggests that lake levels, rates of bank erosion and drainage, and depth of the thaw bulb in sediments beneath the lake may increase in response to a warmer and wetter climate. Assessment of lake dynamics entails separating seasonal and interannual fluctuations from the long-term response. A program to study lake dynamics was initiated in 2008 and includes: (1) analysis of both long-term lake changes and seasonal/ interannual fluctuations using high-resolution satellite imagery and aerial photographs, (2) repeated high- resolution mapping of shoreline configuration in spring and late summer using differential GPS combined with water level sensors, (3) conducting bathymetric surveys to determine basin shape and water volume, (4) evaluating the relation between wind vectors and surface water currents with real-time satellite networked GPS-enabled floats and a wide-area wireless network, and (5) quantifying the energy and water balance on a representative lake using data collected from a fully instrumented buoy. Lake basins surveyed near Barrow, Alaska have a maximum depth of 1.5-3.0 m and are characterized by a steep drop-off near the shore and very gradual deepening toward the center. Seasonal shoreline fluctuations are observed in most lakes, with the maximum effect noted in low-lying regions of the lake margin as the water level gradually falls through summer. Preliminary analysis of the lake energy and water balance is presented, including measurements of incoming and outgoing radiation, latent and sensible heat flux, and associated lake temperature and atmospheric parameters. In subsequent years, measurements will be made on lakes further inland where the surficial geology and climate differs from the coastal environment.

  1. Microbial extremophiles from the 2008 Schirmacher Oasis Expedition: preliminary results

    NASA Astrophysics Data System (ADS)

    Hoover, Richard B.; Pikuta, Elena V.; Townsend, Alisa; Anthony, Joshua; Guisler, Melissa; McDaniel, Jasmine; Bej, Asim; Storrie-Lombardi, Michael

    2008-08-01

    Among the most interesting targets for Astrobiology research are the polar ice caps and the permafrost of Mars and the ice and liquid water bodies that may lie beneath the frozen crusts of comets, the icy moons of Jupiter (Europa, Io and Ganymede) and Saturn (Titan and Enceladus). The permanently ice-covered lakes of Antarctica, such as Lake Vostok and Lake Untersee, provide some of the best terrestrial analogues for these targets. The 2008 International Tawani Schirmacher Oasis/Lake Untersee Expeditions have been organized to conduct studies of novel microbial extremophiles and investigate the biodiversity of the glaciers and ice-covered lakes of Dronning Maud Land, East Antarctica. This paper describes the preliminary analysis of the anaerobic microbial extremophiles isolated from samples collected during the 2008 International Schirmacher Oasis Antarctica Reconnaissance Expedition. These samples showed great diversity of psychrophlic and psychrotolerant bacteria. Six new anaerobic strains have been isolated in pure cultures and partially characterized. Two of them (strains ARHSd-7G and ARHSd-9G) were isolated from a small tidal pool near the colony of African Penguins Spheniscus demersus. Strain ARHSd-7G was isolated on mineral anaerobic medium with 3 % NaCl, pH 7 and D-glucose, it has motile, vibrion shape cells, and is Gram variable. Strain ARHSd-9G grew on anaerobic, alkaline medium with pH 9 and 1 % NaCl at 3°C. The substrate was D-glucose supplemented with yeast extract (0.05 %). Cells of strain ARHSd-9G had morphology of straight or slightly curved elongated rods and demonstrated unusual optical effects under dark-field visible light microscopy. The cells were spore-forming and Gram positive. From the mat sample collected near Lake Zub, the new strain LZ-3 was isolated in pure culture at 3°C. Strain LZ-3 was anaerobic and grew on 0.5 % NaCl mineral medium with Dglucose as a substrate. The gram positive cells were spore-forming. They exhibited a

  2. Preliminary results of the ground geophysical monitoring in Gschliefgraben

    NASA Astrophysics Data System (ADS)

    Jochum, Birgit; Lovisolo, Mario; Supper, Robert; Ita, Anna; Baron, Ivo; Ottowitz, David

    2010-05-01

    In September 2009, a fully automatic multiparametric in place column D.M.S. IUT, (68 sensors, active monitoring depth = 33 m) designed and manufactured by the Italian company C.S.G. S.r.l., was installed in an inclinometric borehole by helicopter at Gschliefgraben landslide. The landslide is affecting houses and a road at the eastern rim of the Traunsee and caused considerable damage in 2007/2008. The survey area is located at the border of the Flysch Zone and the Northern Limestone Alps, which is known to be prone to landslide activity. Extensive drainaging reduces the amount of precipitation seeping into the ground. Thus, the displacement monitored in real time by DMS at the present time seems to be not strickly dependent of rainfall. The preliminary data show a main sliding zone occurring at 10-12 m bgl. The mean velocity was 10 mm/month in the interval time 24 September - 24 November, then the time history shows an increase up to 15 mm/month until the end of December. In the first days of January 2010 the velocity trend is reducing to 2 mm/week. An extensive geolectrical survey has been performed before to interpret the subsurface structure regarding possible depths and spatial delimitation of the sliding zone and to find the best position of the monitoring system. In the vicinity of the inclinometer a geoelectric monitoring system (GeoMonitor4D, developed by the Geological Survey of Austria) was installed to correlate measured resistivity values with displacement rates. It consists of 2 profiles, with a length of 120m and 192m. Both systems send their data once a day automatically by UMTS to the data centers in Ricaldone (Italy) and Vienna (Austria). In spring 2010 a second DMS column will be placed at the foot of the hill. The integrated analysis of the airborne and ground measurements, carried out by the Geological Survey of Austria combined with several other parameters, provided by the Torrent and Avalanche Control, will contribute to understand the

  3. Magnetotelluric investigation across the Agri Valley: preliminary results.

    NASA Astrophysics Data System (ADS)

    Balasco, Marianna; Romano, Gerardo; Siniscalchi, Agata; Alfredo Stabile, Tony

    2017-04-01

    The Agri Valley is an axial zone of the Southern Apennines thrust belt chain with a strong seismogenic potential where two important energy technologies responsible for inducing/triggering seismicity are active: (1) the disposal at the Costa Molina 2 injection well of the wastewater produced during the exploitation of the biggest onshore oil field in west Europe (27 wells producing more than 80,000 barrels of crude oil per day), managed by the Eni S.p.A., and (2) the water loading and unloading operations in the Pertusillo artificial reservoir. It is recognized the possibility that the fluctuation of the water level inside the reservoir, due to the hydrological cycle for example, produces pressure perturbations at the bottom of reservoir, causing induced seismicity. Furthermore it is even more known the role of fluids in the rupture processes which could cause an increase of pore pressure specially at high rate of injection fluids and/or for the presence of weakening of preexisting faults. With the aim to better characterize and understand the physical processes involved in the observed induced/triggered seismicity, in 2016 a broadband seismic network, covering an area of about 20 km x 20 km nearby the Pertusillo Dam and Costa Molina2 well has been installed in the framework of SIR-MIUR project INSIEME (INduced Seismicity in Italy: Estimation, Monitoring, and sEismic risk mitigation) and a MagnetoTelluric (MT) survey has been performed. The MT investigation consists of 25 soundings aligned along 30 km profile oriented at about N40 direction, orthogonal with the strike of the major and noticeable geological structures and crossing both of the source that may induce/trigger seismicity. In this work, we present the preliminary 2D resistivity model which provides useful deep geophysical information for understanding the geological and structural setting of the Agri Valley. Moreover, the comparison of the resistivity model with the earthquake location as inferred from

  4. The Sunphotometer Airborne Validation Experiment 2012: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Estellés, Victor; Marenco, Franco; Ryder, Claire L.; Campanelli, Monica; Expósito, Francisco; Solá, Yolanda; Segura, Sara; Marcos, Carlos; Toledano, Carlos; Berjón, Alberto; Guirado, Carmen; Claxton, Bernard; Todd, Martin

    2013-04-01

    to provide detailed vertically resolved aerosol measurements, in order to compare these to sunphotometer retrievals. Simultaneously, 4 different ground AERONET - Cimel sites were deployed in the Tenerife island, at different latitudes and altitudes for further investigation of spatial and vertical variability. Three of these sites also measured solar radiation components with CM21 pyranometers and CHP1 pirheliometers, for further research on radiative forcing of aerosols. One site was equipped with a Prede POM sun-sky radiometer for comparison with Cimel sunphotometer. On the other hand, for the FENNEC campaign another AERONET Cimel sunphotometer was deployed in Zouerate (Mauritania). The ideal conditions for such a comparison consisted of cloudless skies and high mineral aerosol burdens, brought by the Saharan outflow. Although these conditions were not reached in the Tenerife area during the scheduled field campaign, appropriate conditions were met in western Mauritania, over the AERONET Zouerate site. In this study, we perform a preliminary analysis of the columnar properties of aerosols in the Canary Islands and West Sahara areas during the FENNEC 2011 and FENNEC-SAVEX 2012 field campaigns, with an emphasis on the comparison between the size distributions retrieved from both AERONET and SKYRAD algorithms using the Zouerate Cimel site data. Validation of the vertical integrated aerosol size distributions will be also presented. References - M.Campanelli, V.Estelles, T. Smyth, T. Nakajima, M. Hashimoto, A.Lupi, C. Tomas, "Retrieval of aerosol radiative properties from sun-sky radiometers measurements of ESR network: comparison between the inversion codes Skyrad4.2.pack and the new Skyrad5.pack", European Aerosol Conference, 2011. - V. Estellés, M. Campanelli, M. P. Utrillas, F. Expósito, and J. A. Martínez-Lozano, "Comparison of AERONET and SKYRAD4.2 inversion products retrieved from a Cimel CE318 sunphotometer", Atmos. Meas. Tech. 5, 569—579, 2012.

  5. The Mount Logan (Yukon) Ice Cores: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Fisher, D. A.

    2004-05-01

    Bourgeois, Mike Demuth, David Fisher, Roy Koerner,Chris Zdanowicz, James Zheng. University of Ottawa: Ian Clarke,Raphaelle Cardyn. National Institute of Polar Research (Japan): Kumiko Goto-Azuma University of New Hampshire: Cam Wake, Kaplan Yalcin. University of Maine: Karl Kreutz, Paul Mayewski, Erich Osterberg. Arctic Institute of North America: Gerald Holdsworth. University of Washington: Eric J. Steig, Summer B. Rupper. University of Copenhagen: Dorthe Dahl-Jensen. David Fisher is the presenter but many contributed to what is a joint preliminary offering.

  6. Results of a preliminary assessment of an explosive projectile launch system

    SciTech Connect

    Reaugh, J.E.

    1995-07-31

    This report presents results on a preliminary assessment of accelerating a projectile by a sequence of timed explosions. Computerized simulations were performed with CALE, a two-dimensional Arbitrary Language Eulerian program to examine principles and preferred operating parameters.

  7. 76 FR 65497 - Freshwater Crawfish Tail Meat From the People's Republic of China: Preliminary Results of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-21

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF COMMERCE International Trade Administration Freshwater Crawfish Tail Meat From the People's Republic of China: Preliminary Results of Antidumping Duty Administrative Review and Intent To Rescind Review in Part...

  8. PRELIMINARY RESULTS: EVALUATIONS OF THE ALTERNATIVE ASBESTOS CONTROL METHOD FOR BUILDING DEMOLITION

    EPA Science Inventory

    This presentation describes the preliminary results of the evaluations of the alternative asbestos control method for demolishing buildings containing asbestos, and are covered under the regulatory requirements of the Asbestos NESHAP. This abstract and presentation are based, at ...

  9. 75 FR 26922 - Magnesium Metal From the Russian Federation: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-13

    ... International Trade Administration Magnesium Metal From the Russian Federation: Preliminary Results of Antidumping Duty Administrative Review AGENCY: Import Administration, International Trade Administration..., Office 5, Import Administration, International Trade Administration, U.S. Department of Commerce,...

  10. 76 FR 47558 - Polyethylene Terephthalate Film, Sheet, and Strip From India: Preliminary Results of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-05

    ... International Monetary Fund's publication International Financial Statistics (IMF Statistics). Ester received... International Trade Administration Polyethylene Terephthalate Film, Sheet, and Strip From India: Preliminary Results of Countervailing Duty Administrative Review AGENCY: Import Administration, International Trade...

  11. PRELIMINARY RESULTS: EVALUATIONS OF THE ALTERNATIVE ASBESTOS CONTROL METHOD FOR BUILDING DEMOLITION

    EPA Science Inventory

    This presentation describes the preliminary results of the evaluations of the alternative asbestos control method for demolishing buildings containing asbestos, and are covered under the regulatory requirements of the Asbestos NESHAP. This abstract and presentation are based, at ...

  12. In Situ Oxidation of Liquid Trichloroethylene by Permanganate Solutions: Preliminary Results of Column Studies

    SciTech Connect

    Schroth, Martin H.; Oostrom, Mart; Wietsma, Thomas W.; Istok, Jonathan D.; H.J. Morel-Seytoux

    2000-01-11

    In situ oxidation of liquid trichloroethylene by permanganate solutions: Preliminary results of column studies. In: Proceedings of the 19th American Geophysical Union Hydrology Days, H. J. Morel-Seytoux, ed., pp. 411-420. Hydrology Days Pub., Atherton, Ca.

  13. 77 FR 60103 - Fresh Tomatoes From Mexico: Notice of Preliminary Results of Changed Circumstances Review and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-02

    ... percent of U.S. production of the domestic like product. Certain Orange Juice from Brazil: Preliminary..., 60242 (October 10, 2008), unchanged in Certain Orange Juice From Brazil: Final Results of Antidumping...

  14. Preliminary Results from the Application of Automated Adjoint Code Generation to CFL3D

    NASA Technical Reports Server (NTRS)

    Carle, Alan; Fagan, Mike; Green, Lawrence L.

    1998-01-01

    This report describes preliminary results obtained using an automated adjoint code generator for Fortran to augment a widely-used computational fluid dynamics flow solver to compute derivatives. These preliminary results with this augmented code suggest that, even in its infancy, the automated adjoint code generator can accurately and efficiently deliver derivatives for use in transonic Euler-based aerodynamic shape optimization problems with hundreds to thousands of independent design variables.

  15. A Preliminary Report on Some Recent Results in Born Inversion.

    DTIC Science & Technology

    2014-09-26

    of pseudo-differential operators, generalized Radon transforms, and generalized back projections. Moreover, Beylkin frames his work in an N...Beylkin uses powerful results in the theory of generalized Radon transforms. However, noting that the result on the left must involve a Dirac delta...pseudo-differential operators, generalized Radon transforms, and generalized back projections. Moreover, Beylkin frames his work in an N- dimensional

  16. New preliminary results on the physics of charm hadroproduction subprocesses

    SciTech Connect

    Appel, J.A

    1994-10-01

    This paper reviews the results and physics of two contributed papers to ICHEP94. Both papers relate to charm meson hadroproduction at Fermilab fixed target energies. The first (from E769) addresses the total forward cross section for charm mesons (D{sup {plus_minus}} and D{sub s}{sup {plus_minus}}) produced by {pi}{sup {plus_minus}}, K{sup {plus_minus}}, and proton beams. The second paper (from E791) deals with the asymmetries in the differential cross sections for charged D mesons produced in the forward direction by {pi}{sup {minus}} beam. The physics most directly related to the results of the E769 paper are the gluon distributions in the incident hadrons as well as perturbative QCD calculations of charm quark production and the charm quark mass. The E791 results address the details of the hadronization process after production of the charm quarks.

  17. Correlation of thermography with spinal dysfunction: preliminary results

    PubMed Central

    Diakow, Peter RP; Ouellet, Sandra; Lee, Selina; Blackmore, Edward J

    1988-01-01

    The results of a blinded pilot study researching the correlation of thermographic abnormalities and spinal segmental dysfunction are presented. The highest agreement resulted between focal increases in thermal emission and fixation (64.7%). Other parameters studied were tenderness and textural skin changes which agreed with thermographic findings 63.7% and 59.9% respectively. Correlation coefficients were calculated for each subject and reasons for the wide range (r = .14 to .77) were discussed. Discussion of this research design and suggestions for future study were also presented.

  18. Bayesian Evidence for Two Populations of White Dwarfs: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Valentim, R.; Romero, A. D.; Kepler, S. O.; Horvath, J. E.; Rangel, E. M.

    2017-03-01

    White dwarf (WD) populations are analyzed using Bayesian tools, which allows inferring possible evolutionary paths through the study of the mass values. We employed a sample of 2761 DA white dwarf stars from the SDSS, and obtained the central mass values and their corresponding standard deviations using a bimodal population as an ansatz. The results indicate a population with M1 = 0.60 M⊙ and σ1 = 0.06 M⊙, corresponding to a single stellar evolution, and a second population with M2 = 1.00 M⊙ and σ1 = 0.11 M⊙ possibly due to binary evolution resulting from mergers.

  19. Novel benzophenothiazinium photosensitizers: preliminary in-vivo results

    NASA Astrophysics Data System (ADS)

    Cincotta, Anthony H.; Cincotta, Louis; Foley, James W.

    1990-07-01

    The photochemotherapeutic properties of several novel benzophenothiazines were evaluated zn-vzvo in three distinct tumor types consisting of a murine sarcoma, human carcinoma, and a rat glioma. Subcutaneous or intravenous administration of dyes to tumor bearing animals coupled with irradiation of the tumor area with 640 nm light resulted in substantial tumor necrosis 24h post photodynamic therapy as determined by histological evaluation. Significantly, there was minimal concurrent damage to the surrounding normal tissue. These results offer further evidence for the potential usefulness of benzophenothiazines in the photodynamic therapy of neoplasms.

  20. Preliminary Benchmarking and MCNP Simulation Results for Homeland Security

    SciTech Connect

    Robert Hayes

    2008-03-01

    The purpose of this article is to create Monte Carlo N-Particle (MCNP) input stacks for benchmarked measurements sufficient for future perturbation studies and analysis. The approach was to utilize historical experimental measurements to recreate the empirical spectral results in MCNP, both qualitatively and quantitatively. Results demonstrate that perturbation analysis of benchmarked MCNP spectra can be used to obtain a better understanding of field measurement results which may be of national interest. If one or more spectral radiation measurements are made in the field and deemed of national interest, the potential source distribution, naturally occurring radioactive material shielding, and interstitial materials can only be estimated in many circumstances. The effects from these factors on the resultant spectral radiation measurements can be very confusing. If benchmarks exist which are sufficiently similar to the suspected configuration, these benchmarks can then be compared to the suspect measurements. Having these benchmarks with validated MCNP input stacks can substantially improve the predictive capability of experts supporting these efforts.

  1. Articulatory measurement and synthesis. Methods and preliminary results.

    PubMed

    Heike, G

    1979-01-01

    The relations between area functions of the vocal tract and the acoustic result are of phonetic interest only if they can be interpreted in articulatory terms. We show which problems may arise if two-dimensional configurations of the vocal tract are to be transformed into area functions, and which relations exist between articulatory variables, area functions, and formant frequencies in an articulatory model.

  2. Family Characteristics of Anxious ADHD Children: Preliminary Results

    ERIC Educational Resources Information Center

    Kepley, Hayden O.; Ostrander, Rick

    2007-01-01

    Objective: To investigate the family environments of children in a community sample with ADHD and co-occurring anxiety. Method: Family Environment Scale, Behavioral Assessment System for Children, and Structured Clinical Interview are administered to parents of children with ADHD with and without anxiety. Results: ADHD families are uniformly less…

  3. Preliminary Results from the QuietSpike Flight Test

    NASA Technical Reports Server (NTRS)

    Haering, Edward A., Jr.; Cliatt, Larry J., II; Howe, Don; Waithe, Kenrick

    2007-01-01

    This viewgraph presentation reviews the QuietSpike flight test results. It shows the previous tests from Nearfield probes. The presentation then reviews the approach to test the QuietSpike, and shows graphics of the positions of the test vehicles. It also shows the components of the Sonic Boom Probing Noseboom. A graph of the Pressure Over- Under-shoot (Shaped Sonic Boom Demonstration (SSBD)Data) is presented. It reviews the Shock Probing Orientations, explaining that the probing plane is always behind the tail of the QuietSpike jet. Graphs of the Shock Position Geometry (SSBD Data) and the QuietSpike signature as of the test on 12/13/06, Near-Field Probing Directly Under the QuietSpike jet, and Near-Field Probing to Side, Near-Field Probing Above and to Side. Several slides review the Computational Fluid Dynamic models, and results compared to the probe tests.

  4. Preliminary results of in vitro propagation of Guayule

    NASA Technical Reports Server (NTRS)

    Dastoor, M. N.; Schubert, W. W.; Petersen, G. R.

    1981-01-01

    Guayule, Parthenium argentatum Gray, was first established in tissue culture by Bonner and Arreguin (1950) as a means to study the effects of various chemicals and extracts on rubber production. The propagation of whole guayule plants from tissue culture, however, has not been accomplished. The reported investigation is concerned with such an objective. In an attempt to stimulate rubber production in Guayule, Yokoyama et al. (1977) sprayed juvenile plants with 2-(3,4-dichloro-phenoxy)triethylamine (TEA derivative). This treatment resulted in increased isoprenoid levels in the plant tissue. In the current investigation, experiments were conducted to study the effect of TEA derivative on in vitro cultures. It was found that a suppression of callus formation occurs at a 10 mg/L concentration of TEA derivative with a resultant increase of shoot formation. Lower and higher concentrations of TEA derivative promote callus formation.

  5. Double Hale's cycle in changes of sunspot diameters. Preliminary results

    NASA Astrophysics Data System (ADS)

    Lozitsky, V.; Efimenko, V.

    2017-06-01

    Integral distributions for diameters of sunspots are analyzed in cycles Nos. 12-24. For determination of index of integral distribution α, the large sunspots of 50-90 Mm are taken into account; all data are averaged for each 11-year cycle for better accuracy. The main results are following: (a) the mean value of α index is 5.4 for last 13 cycles; (b) secular trend in changes of α index is absent, and (c) there are reliable evidences of double Hale's cycle (about 44 years). In particular, the lowest values of α index were found for cycles Nos. 14, 17-18 and 22. Since this index reflects the dispersion of sunspot diameters, obtained results indicate that convective zone of the Sun generates the embryos of active regions in different statistical regimes which change with cycle about 44 years.

  6. Finding four dimensional symplectic maps with reduced chaos: Preliminary results

    SciTech Connect

    Weishi Wan; Cary, J.R.; Shasharina, S.G.

    1998-06-01

    A method for finding integrable four-dimensional symplectic maps is outlined. The method relies on solving for parameter values at which the linear stability factors of the fixed points of the map have the values corresponding to integrability. This method is applied to accelerator lattices in order to increase dynamic aperture. Results show a increase of the dynamic aperture after correction, which implies the validity of the method.

  7. Preliminary results from the LDEF/UTIAS composite materials experiment

    NASA Technical Reports Server (NTRS)

    Tennyson, R. C.; Mabson, G. E.; Morison, W. D.; Kleiman, J.

    1992-01-01

    A total of 107 epoxy matrix composite samples containing carbon, boron, and aramid fiber reinforcements were flown on the Long Duration Exposure Facility (LDEF) satellite. For the first 371 days after deployment, strain and temperature data were recorded every 16 hours. Results were obtained on time to outgas, dimensional changes, coefficients of thermal expansion, atomic oxygen erosion, and damage due to micrometeoroid/debris impacts.

  8. Viking orbital colorimetric images of mars: Preliminary results

    USGS Publications Warehouse

    Soderblom, L.A.

    1976-01-01

    Color reconstruction and ratios of orbital images of Mars confirm Earth-based measurements showing red/violet ratios for bright areas to be roughly 1.5 times greater than dark areas. The new results show complex variation among dark materials; dark streaks emanating from craters in southern cratered terrains are much bluer than dark materials of the north equatorial plains on which Viking 1 landed.

  9. Preliminary Results form the Japanese Total Lightning Network

    NASA Astrophysics Data System (ADS)

    Hobara, Y.; Ishii, H.; Kumagai, Y.; Liu, C.; Heckman, S.; Price, C. G.; Williams, E. R.

    2015-12-01

    We report on the initial observational results from the first Japanese Total Lightning Detection Network (JTLN) in relation to severe weather phenomena. The University of Electro-Communications (UEC) has deployed the Earth Networks (EN) Total Lightning System over Japan to carry out research on the relationship between thunderstorm activity and severe weather phenomena since 2013. In this paper we first demonstrate the current status of our new network followed by the initial scientific results. The lightning jump algorithm was applied to our total lightning data to study the relationship between total lighting activity and hazardous weather events such as gust fronts and tornadoes over land reported by the JMA (Japanese Meteorological Agency) in 2014. As a result, a clear increase in total lighting flash rate as well as lightning jumps are observed prior to most hazardous weather events (~20 min) indicating potential usefulness for early warning in Japan. Furthermore we are going to demonstrate the relationship of total lightning activities with meteorological radar data focusing particularly on Japanese Tornadic storms.

  10. Magnetic field studies by Voyager 2 - Preliminary results at Saturn

    NASA Technical Reports Server (NTRS)

    Ness, N. F.; Acuna, M. H.; Behannon, K. W.; Burlaga, L. F.; Connerney, J. E. P.; Lepping, R. P.; Neubauer, F. M.

    1982-01-01

    Results of Voyager 2 studies of the magnetosphere and planetary magnetic field of Saturn are presented. Magnetometer studies have confirmed the results obtained by Voyager 1, indicating the magnetic field to be that of a centered dipole of moment 0.21 gauss Saturn radii-cubed, tilted approximately 0.8 deg from the rotation axis and a maximum measured field intensity of 1187 nT at latitude 17.3 deg N just before periapsis. Voyager 2 observed multiple bow shock and magnetopause crossings during its inbound and outbound trajectories, which were complementary to those of Voyager 1, including magnetopause crossing at 18.5 Saturn radii on the inbound trajectory, and at 48.4-50.9 Saturn radii outbound indicative of magnetospheric expansion due to changing solar wind conditions. Throughout the outbound passage, the magnetospheric field was observed to be relatively steady and smooth, with no evidence for any azimuthal asymmetry or magnetic anomaly. Results thus are incapable of accounting for the observed periodic modulation of the Saturnian kilometric radio emissions.

  11. Transplantation of adult fibroblast nuclei into the central region of metaphase II eggs resulted in mid-blastula transition embryos.

    PubMed

    Pérez-Camps, Mireia; Cardona-Costa, Jose; García-Ximénez, Fernando

    2010-06-01

    Recently, a novel technical method to perform somatic nuclear transplantation (NT) in zebrafish using nonactivated eggs as recipients without the need to detect the micropyle was developed in our lab. However, the use of spermatozoa as an activating agent prevented to know whether the inserted nucleus compromised embryonic and early larval developmental ability. The aim of the present work was to test the developmental ability of the embryos reconstructed by transplanting adult fibroblast nuclei into the central region of the metaphase II egg but subsequently activated by only water. In addition, because an oocyte aging facilitates the activation in mammalian oocytes, this work also pursued to test whether the use of limited-aged eggs (2 h) as recipients improved the activation process in zebrafish NT. The adult somatic nucleus located in the central region of the nonactivated egg resulted in the 12% of mid-blastula transition embryos versus the 20% when the transplant is in the animal pole (p >or= 0.05). This suggests that the central region of the nonactivated metaphase II eggs can be a suitable place for nucleus deposition in NT in zebrafish. These results reinforce the possibility to use nonactivated metaphase II eggs in subsequent reprogramming studies by adult somatic NT in zebrafish. Unfortunately, in contrast to mammals, a limited egg aging (2 h) did not improve the activation process in zebrafish NT.

  12. Preliminary results from the new HIV surveillance system in France.

    PubMed

    Lot, F; Semaille, C; Cazein, F; Barin, F; Pinget, R; Pillonel, J; Desenclos, J C

    2004-10-01

    In addition to AIDS surveillance, data on HIV infection are necessary to better follow the dynamics of the epidemic. We report the first results of France's mandatory anonymous HIV notification system, which is linked to a virological surveillance of recent HIV infections and of circulating HIV types, groups and subtypes. HIV notifications are initiated by microbiologists who create an anonymous code of patient's identity. Clinicians complete the notification form with epidemiological and clinical data. Notifications are sent to the local health authorities and passed to the Institut de Veille Sanitaire (InVS). Laboratories voluntarily send sera from newly diagnosed HIV infected persons on dried blood spots to the national HIV reference laboratory where an immunoassay for recent infection (< or = 6 months) and a serotyping assay for the determination of group and subtype are done. The virological results are then merged at the InVS with the information from the mandatory reporting. Of the first 1301 new HIV diagnoses reported in 2003, 43% were in women, and overall, 53% were in heterosexuals, of whom 47% were of sub-Saharan African origin. MSM accounted for 36% of male notifications. A dried blood spot was available for 64% of new HIV diagnoses. Evidence of recent infection was found for 38%, ranging from 22% in IDUs to 58% in MSM. Twenty-six percent of infections in sub-Saharan migrants were recent infections. HIV-1 accounted for 98% of all notifications: 48% of these were non-B subtypes. The first results of the HIV notification system indicate that heterosexual transmission is the predominant mode of transmission and that persons originating from sub-Saharan Africa are particularly affected. Over half of infections shown to be recently acquired were in MSM; this may indicate an increased HIV incidence in this population.

  13. Hawaii scientific drilling protect: Summary of preliminary results

    USGS Publications Warehouse

    DePaolo, D.; Stolper, E.; Thomas, D.; Albarede, F.; Chadwick, O.; Clague, D.; Feigenson, M.; Frey, F.; Garcia, M.; Hofmann, A.; Ingram, B.L.; Kennedy, B.M.; Kirschvink, J.; Kurz, M.; Laj, Carlo; Lockwood, J.; Ludwig, K.; McEvilly, T.; Moberly, R.; Moore, G.; Moore, J.; Morin, R.; Paillet, F.; Renne, P.; Rhodes, M.; Tatsumoto, M.; Taylor, H.; Walker, G.; Wilkins, R.

    1996-01-01

    Petrological, geochemical, geomagnetic, and volcanological characterization of the recovered core from a 1056-m-deep well into the flank of the Mauna Kea volcano in Hilo, Hawaii, and downhole logging and fluid sampling have provided a unique view of the evolution and internal structure of a major oceanic volcano unavailable from surface exposures. Core recovery was ???90%, yielding a time series of fresh, subaerial lavas extending back to ???400 ka. Results of this 1993 project provide a basis for a more ambitious project to core drill a well 4.5 km deep in a nearby location with the goal of recovering an extended, high-density stratigraphic sequence of lavas.

  14. Biotransformation of phosphogypsum on distillery decoctions (Preliminary results).

    PubMed

    Wolicka, Dorota; Kowalski, Włodzimierz

    2006-01-01

    The paper presents the activity of anaerobic bacterial communities isolated from soil polluted by aircraft fuel on distillery decoctions with phosphogypsum. The microorganisms were selected using the microcosms method, and then enriched on Postgate medium with ethanol. The isolated communities became the inoculum to establish a culture on potato and rye distillery decoctions. The obtained results show that a simultaneous removal of two industrial wastes such as phosphogypsum and distillery decoctions is possible. The introduction of a inoculation comprising a selected anaerobic bacterial community into the culture does not influence the increase of the biotransformation process efficiency.

  15. Development and preliminary results of radio frequency ion source

    SciTech Connect

    Xie, Yahong Hu, Chundong; Jiang, Caichao; Chen, Yuqian; Gu, Yumin; Su, Renxue; Xie, Yuanlai; Liu, Zhimin

    2016-02-15

    A radio frequency (RF) ion source was designed and developed for neutral beam injector. A RF driver test bed was used with a RF generator with maximum power of 25 kW with 1 MHz frequency and a matching box. In order to study the characteristic of RF plasma generation, the capacitance in the matching box was adjusted with different cases. The results show that lower capacitance will better the stability of the plasma with higher RF power. In the future, new RF coils and matching box will be developed for plasma generators with higher RF power of 50 kW.

  16. Laser comb with velocity bunching: Preliminary results at SPARC

    NASA Astrophysics Data System (ADS)

    Ferrario, M.; Alesini, D.; Bacci, A.; Bellaveglia, M.; Boni, R.; Boscolo, M.; Calvani, P.; Castellano, M.; Chiadroni, E.; Cianchi, A.; Cultrera, L.; di Pirro, G.; Ficcadenti, L.; Filippetto, D.; Gallo, A.; Gatti, G.; Giannessi, L.; Labat, M.; Lupi, S.; Marchetti, B.; Marrelli, C.; Migliorati, M.; Mostacci, A.; Nicoletti, D.; Pace, E.; Palumbo, L.; Petrillo, V.; Quattromini, M.; Ronsivalle, C.; Rossi, A. R.; Rosenzweig, J.; Serafini, L.; Serluca, M.; Spataro, B.; Tomizawa, H.; Vaccarezza, C.; Vicario, C.

    2011-05-01

    A new technique, named “laser comb”, was tested during the last SPARC run. It is able to produce electron pulse trains with a charge of some hundreds pC, a repetition rate of some terahertz, and a sub-picosecond length. This technique is based on the velocity bunching configuration of the SPARC injector. It can be useful to drive pump and probe free-electron laser experiments, to generate coherent excitation of plasma waves in plasma accelerators, and to produce narrow band terahertz radiation. In this paper, we describe the experimental results achieved so far and provide a comparison with simulations.

  17. Preliminary meteorological results on Mars from the viking 1 lander.

    PubMed

    Hess, S L; Henry, R M; Leovy, C B; Ryan, J A; Tillman, J E; Chamberlain, T E; Cole, H L; Dutton, R G; Greene, G C; Simon, W E; Mitchell, J L

    1976-08-27

    The results from the meteorology instruments on the Viking 1 lander are presented for the first 4 sols of operation. The instruments are working satisfactorily. Temperatures fluctuated from a low of 188 degrees K to an estimated maximum of 244 degrees K. The mean pressure is 7.65 millibars with a diurnal variation of amplitude 0.1 millibar. Wind speeds averaged over several minutes have ranged from essentially calm to 9 meters per second. Wind directions have exhibited a remarkable regularity which may be associated with nocturnal downslope winds and gravitational oscillations, or to tidal effects of the diurnal pressure wave, or to both.

  18. Preliminary results of the 249Cf + 48Ca experiment

    SciTech Connect

    Patin, J B; Moody, K J; Stoyer, M A; Wild, J F; Shaughnessy, D A; Stoyer, N J

    2003-11-03

    The results of a detailed analysis performed on the data obtained in the {sup 249}Cf + {sup 48}Ca bombardment is presented. This analysis is independent of the original data analysis performed in Dubna in which two possible decay chains were found. The first decay chain consisted of an evaporation residue implantation followed by two alpha decays and then a spontaneous fission. The second decay chain consisted of an evaporation residue implantation followed by an immediate spontaneous fission event. This analysis confirms that the two interesting events are present in the data. A summary of the two events will be given as well as a description of the analysis performed.

  19. Preliminary results of Finnish-Hungarian Doppler Observation Campaign.

    NASA Astrophysics Data System (ADS)

    Czobor, A.; Ádám, J.; Mihály, S.; Vass, T.; Parm, T.; Ollikainen, M.

    The Finnish-Hungarian Doppler Observation Campaign was carried out in Finland in August 1983 during 13 days. The campaign was organized by the Finnish Geodetic Institute. Three Hungarian JMR-1A receivers and one Finnish JMR-4 occupied 9 stations together with the 1st order triangulation network points of Finland. The data processing was performed in the Satellite Geodetic Observatory, Penc. The observation strategy, the methods of data processing and results obtained by GEODOP and SADOSA programs as well as the S-transformations are presented in this paper.

  20. Simulation of diurnal thermal energy storage systems: Preliminary results

    NASA Astrophysics Data System (ADS)

    Katipamula, S.; Somasundaram, S.; Williams, H. R.

    1994-12-01

    This report describes the results of a simulation of thermal energy storage (TES) integrated with a simple-cycle gas turbine cogeneration system. Integrating TES with cogeneration can serve the electrical and thermal loads independently while firing all fuel in the gas turbine. The detailed engineering and economic feasibility of diurnal TES systems integrated with cogeneration systems has been described in two previous PNL reports. The objective of this study was to lay the ground work for optimization of the TES system designs using a simulation tool called TRNSYS (TRaNsient SYstem Simulation). TRNSYS is a transient simulation program with a sequential-modular structure developed at the Solar Energy Laboratory, University of Wisconsin-Madison. The two TES systems selected for the base-case simulations were: (1) a one-tank storage model to represent the oil/rock TES system; and (2) a two-tank storage model to represent the molten nitrate salt TES system. Results of the study clearly indicate that an engineering optimization of the TES system using TRNSYS is possible. The one-tank stratified oil/rock storage model described here is a good starting point for parametric studies of a TES system. Further developments to the TRNSYS library of available models (economizer, evaporator, gas turbine, etc.) are recommended so that the phase-change processes is accurately treated.

  1. Effects of magnetic soil on metal detectors: preliminary experimental results

    NASA Astrophysics Data System (ADS)

    Das, Y.

    2007-04-01

    In a series of previous papers, analytical results dealing with the effects of soil electromagnetic properties on the performance of induction metal detectors were reported. In this paper experimental data are provided to verify some previously reported results. The time-domain response of a magnetic soil half-space and a small metallic sphere situated in air as well as buried in the soil were measured using a purpose-designed system based on a modified Schiebel AN19/2 metal detector. As in the previous work, the sphere is chosen as a simple prototype for the small metal parts in low-metal landmines. The soil used was Cambodian "laterite" with dispersive magnetic susceptibility, which serves as a good model for soils that are known to adversely affect the performance of metal detectors. The metal object used was a sphere of diameter 0.0254 m made of 6061-T6 aluminum. Experimental data are in good agreement with theoretical predictions. Data also show that for the weakly magnetic soil used in the experiments, the total response of the buried sphere is the sum of the response of the soil and that of the sphere placed in air. This finding should simplify the prediction or measurement of response of buried targets as one can separately measure/compute the response of an object in air and that of the host media and simply add the two. This simplification may not be possible for soils that are more strongly magnetic.

  2. Preliminary results of Mn partitioning experiments on Murchison analogues

    NASA Technical Reports Server (NTRS)

    Boesenberg, Joseph S.; Delaney, Jeremy S.

    1993-01-01

    Eucrites, howardites, and diogenites have Fe/Mn ratios between 30 and 45, while carbonaceous chondrites have much higher values between 90 and 150. Stolper (1977) first showed that basaltic achondrites could evolve from a precursor chondritic material through simple partial melting. These experiments indicated that chondritic material heated to temperatures near 1180 C with a fugacity of one log unit below the iron-wustite buffer curve, produced a eucritic mineralogy that contained olivine, pigeonite, plagioclase, spinel, glass, and metal. The partial melting experiments of Jurewicz et al. (1992) on an hydrous Murchison and Allende also showed that HED compositions were produceable at temperatures between 1130 C and 1325 C with fugacities below and above the iron-wustite buffer curve. However, the MnO abundances of Jurewicz were too low to produce suitable Fe/Mn ratios for HED's. We present below our results of partial melting experiments on Murchison analogues that involved temperatures between 1180 C and 1580 C and fugacities below the iron-wustite buffer curve. Our experiments resulted in MnO abundances nearly twice that of Jurewicz and indicate that the production of basaltic achondrite-like Fe/Mn ratios from precursor chondritic material are possible.

  3. Speckle imaging with the MAMA detector: Preliminary results

    NASA Technical Reports Server (NTRS)

    Horch, E.; Heanue, J. F.; Morgan, J. S.; Timothy, J. G.

    1994-01-01

    We report on the first successful speckle imaging studies using the Stanford University speckle interferometry system, an instrument that uses a multianode microchannel array (MAMA) detector as the imaging device. The method of producing high-resolution images is based on the analysis of so-called 'near-axis' bispectral subplanes and follows the work of Lohmann et al. (1983). In order to improve the signal-to-noise ratio in the bispectrum, the frame-oversampling technique of Nakajima et al. (1989) is also employed. We present speckle imaging results of binary stars and other objects from V magnitude 5.5 to 11, and the quality of these images is studied. While the Stanford system is capable of good speckle imaging results, it is limited by the overall quantum efficiency of the current MAMA detector (which is due to the response of the photocathode at visible wavelengths and other detector properties) and by channel saturation of the microchannel plate. Both affect the signal-to-noise ratio of the power spectrum and bispectrum.

  4. Preliminary Results From the UNICIT High Frequency Microwave Palaeointensity System

    NASA Astrophysics Data System (ADS)

    Biggin, A.; Boehnel, H.; Walton, D.

    2002-05-01

    Two of the biggest problems encountered when using the Thellier method to obtain estimates of the geomagnetic field intensity in the past are thermochemical alteration occurring during the experiments and the time intensive nature of the experiments themselves. Together these factors frequently yield a frustratingly low ratio of success achieved to time spent in the laboratory. However this ratio can be much increased, if microwave radiation instead of conventional thermal energy is used to excite the ferromagnetic grains within samples. Following the recent success of the geomagnetism group at the University of Liverpool in using microwave radiation to perform palaeointensity experiments, a new system has been developed at the Earth science research unit (UNICIT) of UNAM in Querétaro, Mexico. Conceptually, it differs from the Liverpool system (described in the literature) only in that it is designed to use higher frequency microwave radiation (12 to 18 GHz as opposed to 8.5 GHz) as a more efficient means to excite the ferromagnetic systems of materials. The system has been used to perform modified Thellier palaeointensity experiments on volcanic samples which had previously had a full TRM imparted to them using a known field in the laboratory. The results of these experiments were very encouraging and will be presented. Currently, samples derived from recent volcanic material which has previously undergone conventional Thellier analysis are being studied using the microwave system. Results from these experiments will also be discussed.

  5. (67)Ga and (68)Ga purification studies: preliminary results.

    PubMed

    Costa, R F; Barboza, M F; Osso, J A

    2013-01-01

    The positron emission tomography technique is very useful for diagnosis of several diseases. (68)Ga is a positron emitter with half-life of 67.7 min. As it is available from (68)Ge/(68)Ga generator systems, it is not necessary to have a nearby cyclotron. However, the eluate from commercial generators contains high levels of metallic impurities, which compete with (68)Ga in biomolecular labeling. Thus, a subsequent purification step is needed after generator elution. Here we present the results of two different methods developed for handmade purification of (68)Ga and (67)Ga for subsequent radiolabeling of biomolecules. Two purification methods were employed. The first one uses a cation exchange resin, and (68)Ga is eluted with a solution of acetone/acid. The second method of purification is performed by column chromatography solvent extraction, with (68)Ga recovery in deionized water. The best result was achieved with cationic resin AG50W-X8 (>400 mesh). However, the resin is not commercially available. The extraction chromatography column based on absorption of diisopropyl ether in XAD-16 is the most promising purification method. Although the levels of (68)Ga recovery and purification were smaller with the cationic resin method, its advantage is the (68)Ga recovery in deionized water.

  6. Preliminary time-phased TWRS process model results

    SciTech Connect

    Orme, R.M.

    1995-03-24

    This report documents the first phase of efforts to model the retrieval and processing of Hanford tank waste within the constraints of an assumed tank farm configuration. This time-phased approach simulates a first try at a retrieval sequence, the batching of waste through retrieval facilities, the batching of retrieved waste through enhanced sludge washing, the batching of liquids through pretreatment and low-level waste (LLW) vitrification, and the batching of pretreated solids through high-level waste (HLW) vitrification. The results reflect the outcome of an assumed retrieval sequence that has not been tailored with respect to accepted measures of performance. The batch data, composition variability, and final waste volume projects in this report should be regarded as tentative. Nevertheless, the results provide interesting insights into time-phased processing of the tank waste. Inspection of the composition variability, for example, suggests modifications to the retrieval sequence that will further improve the uniformity of feed to the vitrification facilities. This model will be a valuable tool for evaluating suggested retrieval sequences and establishing a time-phased processing baseline. An official recommendation on tank retrieval sequence will be made in September, 1995.

  7. Preliminary results of Mn partitioning experiments on Murchison analogues

    NASA Technical Reports Server (NTRS)

    Boesenberg, Joseph S.; Delaney, Jeremy S.

    1993-01-01

    Eucrites, howardites, and diogenites have Fe/Mn ratios between 30 and 45, while carbonaceous chondrites have much higher values between 90 and 150. Stolper (1977) first showed that basaltic achondrites could evolve from a precursor chondritic material through simple partial melting. These experiments indicated that chondritic material heated to temperatures near 1180 C with a fugacity of one log unit below the iron-wustite buffer curve, produced a eucritic mineralogy that contained olivine, pigeonite, plagioclase, spinel, glass, and metal. The partial melting experiments of Jurewicz et al. (1992) on an hydrous Murchison and Allende also showed that HED compositions were produceable at temperatures between 1130 C and 1325 C with fugacities below and above the iron-wustite buffer curve. However, the MnO abundances of Jurewicz were too low to produce suitable Fe/Mn ratios for HED's. We present below our results of partial melting experiments on Murchison analogues that involved temperatures between 1180 C and 1580 C and fugacities below the iron-wustite buffer curve. Our experiments resulted in MnO abundances nearly twice that of Jurewicz and indicate that the production of basaltic achondrite-like Fe/Mn ratios from precursor chondritic material are possible.

  8. Speckle imaging with the MAMA detector: Preliminary results

    NASA Technical Reports Server (NTRS)

    Horch, E.; Heanue, J. F.; Morgan, J. S.; Timothy, J. G.

    1994-01-01

    We report on the first successful speckle imaging studies using the Stanford University speckle interferometry system, an instrument that uses a multianode microchannel array (MAMA) detector as the imaging device. The method of producing high-resolution images is based on the analysis of so-called 'near-axis' bispectral subplanes and follows the work of Lohmann et al. (1983). In order to improve the signal-to-noise ratio in the bispectrum, the frame-oversampling technique of Nakajima et al. (1989) is also employed. We present speckle imaging results of binary stars and other objects from V magnitude 5.5 to 11, and the quality of these images is studied. While the Stanford system is capable of good speckle imaging results, it is limited by the overall quantum efficiency of the current MAMA detector (which is due to the response of the photocathode at visible wavelengths and other detector properties) and by channel saturation of the microchannel plate. Both affect the signal-to-noise ratio of the power spectrum and bispectrum.

  9. Preliminary Hydrogeologic Characterization Results from the Wallula Basalt Pilot Study

    SciTech Connect

    B.P. McGrail; E. C. Sullivan; F. A. Spane; D. H. Bacon; G. Hund; P. D. Thorne; C. J. Thompson; S. P. Reidel; F. S. Colwell

    2009-12-01

    The DOE's Big Sky Regional Carbon Sequestration Partnership has completed drilling the first continental flood basalt sequestration pilot borehole to a total depth (TD) of 4,110 feet on the Boise White Paper Mill property at Wallula, Washington. Site suitability was assessed prior to drilling by the 2007-2008 acquisition, processing and analysis of a four-mile, five-line three component seismic swath, which was processed as a single data-dense line. Analysis of the seismic survey data indicated a composite basalt formation thickness of {approx}8,000 feet and absence of major geologic structures (i.e., faults) along the line imaged by the seismic swath. Drilling of Wallula pilot borehole was initiated on January 13, 2009 and reached TD on April 6, 2009. Based on characterization results obtained during drilling, three basalt breccia zones were identified between the depth interval of 2,716 and 2,910 feet, as being suitable injection reservoir for a subsequent CO2 injection pilot study. The targeted injection reservoir lies stratigraphically below the massive Umtanum Member of the Grande Ronde Basalt, whose flow-interior section possesses regionally recognized low-permeability characteristics. The identified composite injection zone reservoir provides a unique and attractive opportunity to scientifically study the reservoir behavior of three inter-connected reservoir intervals below primary and secondary caprock confining zones. Drill cuttings, wireline geophysical logs, and 31one-inch diameter rotary sidewall cores provided geologic data for characterization of rock properties. XRF analyses of selected rock samples provided geochemical characterizations of the rocks and stratigraphic control for the basalt flows encountered by the Wallula pilot borehole. Based on the geochemical results, the pilot borehole was terminated in the Wapshilla Ridge 1 flow of the Grande Ronde Basalt Formation. Detailed hydrologic test characterizations of 12 basalt interflow reservoir

  10. Seismic Observations From the Afar Rift Dynamics Project: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Hammond, J. O.; Guidarelli, M.; Belachew, M.; Keir, D.; Ayele, A.; Ebinger, C.; Stuart, G.; Kendall, J.

    2008-12-01

    Following the 2005 Dabbahu rifting event in Afar, 9 broadband seismometers were installed around the active rift segment to study the microseismicity associated with this and subsequent dyking events. These recorded more than one year of continuous data. In March 2007, 41 stations were deployed throughout Afar and the adjacent rift flanks as part of a large multi-national, collaboration involving universities and organisations from the UK, US and Ethiopia. This abstract describes the crustal and upper mantle structure results of the first 19 months of data. Bulk crustal structure has been determined using the H-k stacking of receiver functions and thickness varies from ~45 km on the rift margins to ~16 km beneath the northeastern Afar stations. Estimates of Vp/Vs show normal continental crust values (1.7-1.8) on the rift margins, and very high values (2.0-2.2) in Afar. A study of seismic noise interferometry is in early stages, but inversions using 20 s Green's function estimates, with some control from regional surface waves, show evidence for thin crustal regions around the recently rifted Dabbahu segment. To improve our understanding of the physical and compositional properties of the crust and locate regions of high attenuation (an indicator of melt), we determine attenuation (Q) using t* values measured from spectra of P wave arrivals. We present whole path attenuation from source to receiver, which will provide a starting point for a future tomographic inversion. SKS-wave splitting results show sharp changes over small lateral distances (40° over <30 km), with fast directions overlying the Dabbahu segment aligning parallel with the recent diking. This supports ideas of melt dominated anisotropy beneath the Ethiopian rift. Seismic tomography inversions show that in the top 150 km low velocities mimic the trend of the seismicity in Afar. The low velocity anomalies extend from the main Ethiopian rift NE, towards Djibouti, and from Djibouti NW towards the

  11. Preliminary results from the heavy ions in space experiment

    NASA Technical Reports Server (NTRS)

    Adams, J. H., Jr.; Beahm, L. P.; Tylka, A. J.

    1991-01-01

    The Heavy Ions In Space (HIIS) experiment is intended to provide a deep survey of intensely ionizing particles in low earth orbit. Intensely ionizing particles produce single event effects in microelectronic components and are now recognized as the principal cause of spacecraft anomalies. These particles also make an important contribution to radiation doses. Besides the practical applications, HIIS data will be used to study several important scientific questions. By measuring heavy ions that stop in HIIS, the anomalous component of cosmic rays can be studied, evidence can be searched for of heavy ions trapped in the earth's magnetic field and by comparing HISS data with observations from outside the magnetosphere, the mean ionic charge state can be determined of solar energetic particles. HIIS will also record relativistic ultraheavy galactic cosmic rays. Their elemental composition will be measured from tin to uranium. Results are presented on the elemental resolution for stopping heavy ions and relativistic heavy ions.

  12. Preliminary Results of Cleaning Process for Lubricant Contamination

    SciTech Connect

    Eisenmann, D.; Brasche, L.; Lopez, R.

    2006-03-06

    Fluorescent penetrant inspection (FPI) is widely used for aviation and other components for surface-breaking crack detection. As with all inspection methods, adherence to the process parameters is critical to the successful detection of defects. Prior to FPI, components are cleaned using a variety of cleaning methods which are selected based on the alloy and the soil types which must be removed. It is also important that the cleaning process not adversely affect the FPI process. There are a variety of lubricants and surface coatings used in the aviation industry which must be removed prior to FPI. To assess the effectiveness of typical cleaning processes on removal of these contaminants, a study was initiated at an airline overhaul facility. Initial results of the cleaning study for lubricant contamination in nickel, titanium and aluminum alloys will be presented.

  13. Preliminary Results of Testing of Flow Effects on Evaporator Scaling

    SciTech Connect

    Hu, M.Z.

    2002-02-15

    This investigation has focused on the effects of fluid flow on solids deposition from solutions that simulate the feed to the 2H evaporator at the Savannah River Site. Literature studies indicate that the fluid flow (or shear) affects particle-particle and particle-surface interactions and thus the phenomena of particle aggregation in solution and particle deposition (i.e., scale formation) onto solid surfaces. Experimental tests were conducted with two configurations: (1) using a rheometer to provide controlled shear conditions and (2) using controlled flow of reactive solution through samples of stainless steel tubing. All tests were conducted at 80 C and at high silicon and aluminum concentrations, 0.133 M each, in solutions containing 4 M sodium hydroxide and 1 A4 each of sodium nitrate and sodium nitrite. Two findings from these experiments are important for consideration in developing approaches for reducing or eliminating evaporator scaling problems: (1) The rheometer tests suggested that for the conditions studied, maximum solids deposition occurs at a moderate shear rate, approximately 12 s{sup -1}. That value is expected to be on the order of shear rates that will occur in various parts of the evaporator system; for instance, a 6 gal/min single-phase liquid flow through the 2-in. lift or gravity drain lines would result in a shear rate of approximately 16 s{sup -1}. These results imply that engineering approaches aimed at reducing deposits through increased mixing would need to generate shear near all surfaces significantly greater than 12 s{sup -1}. However, further testing is needed to set a target value for shear that is applicable to evaporator operation. This is because the measured trend is not statistically significant at the 95% confidence interval due to variability in the results. In addition, testing at higher temperatures and lower concentrations of aluminum and silicon would more accurately represent conditions in the evaporator. Without

  14. Magnetic resonance imaging of aortic disease: preliminary results

    SciTech Connect

    Amparo, E.G.; Higgins, C.B.; Hoddick, W.; Hricak, H.; Kerlan, R.K.; Ring, E.J.; Kaufman, L.; Hedgecock, M.W.

    1984-12-01

    Fourteen patients with a variety of aortic diseases were evaluated with magnetic resonance imaging (MRI). These included abdominal aortic aneurysms (eight cases), aortoiliac aneurysm (one), thoracoabdominal aneurysm (one), aortic dissections (four), and Takayasu arteritis (one). The size and extent of aneurysms, the presence of thrombus or atherosclerotic debris, the relation to renal and iliac arteries, and the effect of aneurysms on adjacent structures were readily demonstrated by MRI. The size of the residual lumen in a variety of vascular diseases and abnormal blood flow patterns could be assessed. These early results indicated that MRI achieved precise and complete assessment of a number of aortic abnormalities without the administration of any type of contrast material. Thus, early experience suggests that an important application of MRI will be as a totally noninvasive and reliable method for evaluating aortic disease.

  15. Preliminary results from the ASF/GPS ice classification algorithm

    NASA Technical Reports Server (NTRS)

    Cunningham, G.; Kwok, R.; Holt, B.

    1992-01-01

    The European Space Agency Remote Sensing Satellite (ERS-1) satellite carried a C-band synthetic aperture radar (SAR) to study the earth's polar regions. The radar returns from sea ice can be used to infer properties of ice, including ice type. An algorithm has been developed for the Alaska SAR facility (ASF)/Geophysical Processor System (GPS) to infer ice type from the SAR observations over sea ice and open water. The algorithm utilizes look-up tables containing expected backscatter values from various ice types. An analysis has been made of two overlapping strips with 14 SAR images. The backscatter values of specific ice regions were sampled to study the backscatter characteristics of the ice in time and space. Results show both stability of the backscatter values in time and a good separation of multiyear and first-year ice signals, verifying the approach used in the classification algorithm.

  16. Preliminary Results of Cleaning Process for Lubricant Contamination

    NASA Astrophysics Data System (ADS)

    Eisenmann, D.; Brasche, L.; Lopez, R.

    2006-03-01

    Fluorescent penetrant inspection (FPI) is widely used for aviation and other components for surface-breaking crack detection. As with all inspection methods, adherence to the process parameters is critical to the successful detection of defects. Prior to FPI, components are cleaned using a variety of cleaning methods which are selected based on the alloy and the soil types which must be removed. It is also important that the cleaning process not adversely affect the FPI process. There are a variety of lubricants and surface coatings used in the aviation industry which must be removed prior to FPI. To assess the effectiveness of typical cleaning processes on removal of these contaminants, a study was initiated at an airline overhaul facility. Initial results of the cleaning study for lubricant contamination in nickel, titanium and aluminum alloys will be presented.

  17. Automated Optical Meteor Fluxes and Preliminary Results of Major Showers

    NASA Technical Reports Server (NTRS)

    Blaauw, R.; Campbell-Brown, M.; Cooke, W.; Kingery, A.; Weryk, R.; Gill, J.

    2014-01-01

    NASA's Meteoroid Environment Office (MEO) recently established a two-station system to calculate daily automated meteor fluxes in the millimeter-size-range for both single-station and double-station meteors. The cameras each consist of a 17 mm focal length Schneider lens (f/0.95) on a Watec 902H2 Ultimate CCD video camera, producing a 21.7x15.5 degree field of view. This configuration sees meteors down to a magnitude of +6. This paper outlines the concepts of the system, the hardware and software, and results of 3,000+ orbits from the first 18 months of operations. Video from the cameras are run through ASGARD (All Sky and Guided Automatic Real-time Detection), which performs the meteor detection/photometry, and invokes MILIG and MORB (Borovicka 1990) codes to determine the trajectory, speed, and orbit of the meteor. A subroutine in ASGARD allows for approximate shower identification in single-station detections. The ASGARD output is used in routines to calculate the flux. Before a flux can be calculated, a weather algorithm indicates if sky conditions are clear enough to calculate fluxes, at which point a limiting magnitude algorithm is employed. The limiting stellar magnitude is found using astrometry.net (Lang et al. 2012) to identify stars and translated to the corresponding shower and sporadic limiting meteor magnitude. It is found every 10 minutes and is able to react to quickly changing sky conditions. The extensive testing of these results on the Geminids and Eta Aquariids is shown. The flux involves dividing the number of meteors by the collecting area of the system, over the time interval for which that collecting area is valid. The flux algorithm employed here differs from others currently in use in that it does not make the gross oversimplication of choosing a single height to calculate the collection area of the system. In the MEO system, the volume is broken up into a set of height intervals, with the collecting areas determined by the position of the

  18. Preliminary Results from a superconducting photocathode sample cavity

    SciTech Connect

    Peter Kneisel; Jacek Sekutowicz; R. Lefferts; A. Lipski

    2005-05-01

    Pure niobium has been proposed as a photocathode material to extract directly photo-currents from the surface of a RF-gun cavity [1]. However, the quantum efficiency of niobium is {approx}3 {center_dot} 10{sup -4}, whereas electro- or vacuum deposited lead has an {approx} 10 times higher quantum efficiency. We have designed and tested a photo-injector niobium cavity, which can be used to insert photo-cathodes made of different materials in the high electric field region of the cavity. Experiments have been conducted with niobium and lead, which show that neither the Q- values of the cavity nor the obtainable surface fields are significantly lowered. This paper reports about the results from these tests.

  19. Preliminary results of indoor radon survey in V4 countries.

    PubMed

    Muűllerová, M; Kozak, K; Kovács, T; Csordás, A; Grzadziel, D; Holý, K; Mazur, J; Moravcsík, A; Neznal, M; Neznal, M; Smetanová, I

    2014-07-01

    The measurements of radon activity concentration carried out in residential houses of V4 countries (Hungary, Poland and Slovakia) show that radon levels in these countries considerably exceed the world average. Therefore, the new radon data and statistical analysis are required from these four countries. Each partner chose a region in their own country, where radon concentration in residential buildings was expected to be higher. The results of the survey carried out in the period from March 2012 to May 2012 show that radon concentrations are <200 Bq m(-3) in ∼87% of cases. However, dwellings with radon concentration ∼800 Bq m(-3) were found in Poland and Slovakia. It was also found that the distribution of radon frequency follows that of houses according to the year of their construction.

  20. Preliminary results of Linear Induction Accelerator LIA-200

    NASA Astrophysics Data System (ADS)

    Sharma, Archana; Senthil, K.; Praveen Kumar, D. D.; Mitra, S.; Sharma, V.; Patel, A.; Sharma, D. K.; Rehim, R.; Kolge, T. S.; Saroj, P. C.; Acharya, S.; Amitava, Roy; Rakhee, M.; Nagesh, K. V.; Chakravarthy, D. P.

    2010-05-01

    Repetitive Pulsed Power Technology is being developed keeping in mind the potential applications of this technology in material modifications, disinfections of water, timber, and food pasteurization etc. BARC has indigenously developed a Linear Induction Accelerator (LIA-200) rated for 200 kV, 4 kA, 100 ns, 10 Hz. The satisfactory performance of all the sub-systems including solid state power modulator, amorphous core based pulsed transformers, magnetic switches, water capacitors, water pulse- forming line, induction adder and field-emission diode have been demonstrated. This paper presents some design details and operational results of this pulsed power system. It also highlights the need for further research and development to build reliable and economic high-average power systems for industrial applications.

  1. Magnetic field studies at Jupiter by Voyager 1: Preliminary results

    NASA Technical Reports Server (NTRS)

    Ness, N. F.; Acuna, M. H.; Lepping, R. P.; Burlaga, L. F.; Behannon, K. W.; Neubauer, F. M.

    1979-01-01

    Results obtained by the Goddard Space Flight Center magnetometers on Voyager 1 concerning the large scale configuration of the Jovian bow shock and magnetopause, and the magnetic field in both the inner and outer magnetosphere are highlighted. There is evidence that a magnetic tail extending away from the planet on the nightside is formed by the solar wind-Jovian field interaction. This is much like Earth's magnetosphere but is a new configuration for Jupiter's magnetosphere not previously considered from earlier Pioneer data. Magnetic field perturbations associated with intense electrical currents (approximately 5 x 10 to the 6th power amps) flowing near or in the magnetic flux tube linking Jupiter with the satellite Io and induced by the relative motion between Io and the co-rotating Jovian magnetosphere are analyzed and interpreted. These currents may be an important source of heating the ionosphere and interior of Io through Joule dissipation.

  2. Preliminary results from the ASF/GPS ice classification algorithm

    NASA Technical Reports Server (NTRS)

    Cunningham, G.; Kwok, R.; Holt, B.

    1992-01-01

    The European Space Agency Remote Sensing Satellite (ERS-1) satellite carried a C-band synthetic aperture radar (SAR) to study the earth's polar regions. The radar returns from sea ice can be used to infer properties of ice, including ice type. An algorithm has been developed for the Alaska SAR facility (ASF)/Geophysical Processor System (GPS) to infer ice type from the SAR observations over sea ice and open water. The algorithm utilizes look-up tables containing expected backscatter values from various ice types. An analysis has been made of two overlapping strips with 14 SAR images. The backscatter values of specific ice regions were sampled to study the backscatter characteristics of the ice in time and space. Results show both stability of the backscatter values in time and a good separation of multiyear and first-year ice signals, verifying the approach used in the classification algorithm.

  3. Aeolian abrasion on Venus: Preliminary results from the Venus simulator

    NASA Technical Reports Server (NTRS)

    Marshall, J. R.; Greeley, Ronald; Tucker, D. W.; Pollack, J. B.

    1987-01-01

    The role of atmospheric pressure on aeolian abrasion was examined in the Venus Simulator with a constant temperature of 737 K. Both the rock target and the impactor were fine-grained basalt. The impactor was a 3 mm diameter angular particle chosen to represent a size of material that is entrainable by the dense Venusian atmosphere and potentially abrasive by virtue of its mass. It was projected at the target 10 to the 5 power times at a velocity of 0.7 m/s. The impactor showed a weight loss of approximately 1.2 x 10 to the -9 power gm per impact with the attrition occurring only at the edges. Results from scanning electron microscope analysis, profilometry, and weight measurement are summarized. It is concluded that particles can incur abrasion at Venusian temperatures even with low impact velocities expected for Venus.

  4. Bioelectrical impedance analysis for bovine milk: Preliminary results

    NASA Astrophysics Data System (ADS)

    Bertemes-Filho, P.; Valicheski, R.; Pereira, R. M.; Paterno, A. S.

    2010-04-01

    This work reports the investigation and analysis of bovine milk quality by using biological impedance measurements using electrical impedance spectroscopy (EIS). The samples were distinguished by a first chemical analysis using Fourier transform midinfrared spectroscopy (FTIR) and flow citometry. A set of milk samples (100ml each) obtained from 17 different cows in lactation with and without mastitis were analyzed with the proposed technique using EIS. The samples were adulterated by adding distilled water and hydrogen peroxide in a controlled manner. FTIR spectroscopy and flow cytometry were performed, and impedance measurements were made in a frequency range from 500Hz up to 1MHz with an implemented EIS system. The system's phase shift was compensated by measuring saline solutions. It was possible to show that the results obtained with the Bioelectrical Impedance Analysis (BIA) technique may detect changes in the milk caused by mastitis and the presence of water and hydrogen peroxide in the bovine milk.

  5. Preliminary test results for the small community solar power system

    NASA Astrophysics Data System (ADS)

    Pons, R. L.; Boda, F. P.

    1982-11-01

    The design feature, performance test results, and operational features of a parabolic dish concentrator small community power system being developed at JPL are described. The system, a prototype unit for modular energy systems of less than 10 MWe, uses multiple parabolic sections, a 20 kWe hermetically sealed organic Rankine cycle engine, and a permanent magnet alternator. The power component is a single stage axial flow turbine with an air-cooled condenser. A static dc/ac inverter and additional equipment condition the power for grid interface and synchronization. Software has been developed to permit remote, stand-alone operation, and to obtain steady performance during intermittent clouding. Each power module is equipped with microprocessors for virtually independent functioning. Separate control systems in each concentrator assembly govern positioning, fluid flow rate, and turbine speed. The system has produced 16.2 kWe continuous power at a net overall efficiency of 15.4% of the insolation.

  6. Preliminary results from the MAMA detectors for the SOHO mission

    NASA Technical Reports Server (NTRS)

    Slater, David C.; Bergamini, Paolo; Bumala, Robert W.; Timothy, J. G.

    1993-01-01

    Multi-Anode Microchannel Array (MAMA) detector systems are being fabricated and tested for use in the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) and the Ultraviolet Coronagraph Spectrometer (UVCS) instruments on the ESA/NASA Solar and Heliospheric Observatory (SOHO) mission. The SOHO MAMA detector systems have formats of 360 x 1024 pixels and pixel dimensions of 25 x 25 sq microns and are optimized for operation at Extreme Ultraviolet (EUV) wavelengths between 40 and 160 nm. In this paper we report on the initial results of measurements of the performance characteristics of the first flight-configuration detector system employing the new custom Application Specific Integrated Circuits (ASICs) which are designed to improve both the dynamic range and the uniformity of response. The performance characteristics of this detector system are compared with those of earlier breadboard systems employing discrete-component electronics circuits.

  7. The force module for the bending art system. Preliminary results.

    PubMed

    Fischer-Brandies, H; Orthuber, W; Ermert, M; Hussmanns, A

    1998-01-01

    The force module for the bending art system (BAS) is used to calculate the initial forces and moments expected to act on a tooth after changing arch wires. The present study analyses the accuracy of the force module on the basis of 10 patients treated with the BAS (with an average observation period of 10 months). An average of 6 arch wires (0.16" x 0.016" steel) were used on each jaw. The approximate pressure in the periodontium was determined and statistically evaluated from the force module readings. The resulting average pressure values for the molars ranged between 0.26 N/cm2 and 0.54 N/cm2. The value in the area of the incisors, cuspids and bicuspids ranged between 1.03 N/cm2 and 2.83 N/cm2. Maximum pressure was 8.02 N/cm2. The results are discussed from a clinical point of view on a case-to-case basis. They are plausible in and for themselves. The more severe the initial state of misalignment, the higher the pressure values. These forces can be reduced by increasing the number of arch wires or by altering the form of the archwire correspondingly. The computer-generated values should be confirmed by taking a direct measurement on the tooth. The force module is just the first step in providing a reproducible estimation of the forces acting on a tooth. Even if the calculated absolute values should still be judged with reservation, they are nevertheless suitable for providing a comparative evaluation of various treatment concepts with reference to the forces acting on the periodontium and can serve clinicians as a rapidly available decision-making aid.

  8. TURBulence Ocean Lidar (TURBOL): preliminary results of laboratory experiments

    NASA Astrophysics Data System (ADS)

    Josset, D. B.; Hou, W.; Goode, W.; Nootz, G.; Matt, S.

    2016-02-01

    Turbulence is a critical property of the ocean mixed layer and has a direct impact on ocean heat storage and algae photosynthesis. Observing changes in turbulence at the synoptic scale is quite challenging. Research vessels provide a limited geographic/temporal coverage and most systems used to characterize turbulence use in situ instrumentations which disturb the flow and affects turbulence itself. Lidar observations are a promising way to study the ocean properties. Polarization is one of the three key properties of light, in addition to intensity and color (frequency). Each of these properties provides different information about the medium the light passes through, however the information provided by polarization is unique in characterizing the properties of the media. Underwater polarization can be used to study the optical signature of inorganic particles in coastal waters from remote sensing and recent research has shown that scattering due to optical turbulence can be expressed as a function of the depolarization rate. The TURBulence Ocean Lidar is an experimental system, aimed at characterizing underwater turbulence by examining various Stokes parameters. In this presentation, we propose to discuss several results from the laboratory setup of the lidar system, including how the polarization signature is affected by the turbulence intensity. Although the effect on the degree of polarization appears to be a monotonic function of turbulence intensity, our results suggest that the way the light intensity shifts between the different Stokes parameter is much more complex. While this is not unexpected from a theoretical point of view, this has different implications on the optimal configurations of ocean lidar system based on polarization.

  9. Sodium and potassium lidar system and preliminary result in Brazil

    NASA Astrophysics Data System (ADS)

    Du, Lifang

    2017-04-01

    This paper reported that the first sodium and potassium lidar was built at November, 2016 in INPE(S23°,W45°) by National Space Science Center, Chinese Academy of Sciences. This system first time realized the potassium and sodium metal layer at the same time above the detection In South America. The lidar system use a powerful pulse YAG laser to pumped two dye lasers at the same time, and join the advanced technology, such as narrow line-width grating technique, efficient laser frequency doubling technique, wavelength automatic locking technique and the double optical fiber in the focal plane for spectra separation technique and so on, which made the 589 nm and 770 nm laser line width to achieve 0.03cm-1 and the laser frequency doubling efficiency to reached above 65%. In this way, the simultaneously detecting the atmosphere at the altitude of 80 110 km by sodium and potassium fluorescence in one lidar facility has been realized. On November 20, 2016, this system began to observation for the first time in Brazil, and it has the detection data of South America about potassium and sodium at the same time. Observed data show that sodium echo photon counting rate is higher than 31874count/160s/96m, potassium echo photon counting rate is higher than 2153count/320s/96m. Comparing with both of at home or abroad, the results are a very good. In particular, the detection results level of potassium take the leading position in the international.

  10. NEOWISE OBSERVATIONS OF NEAR-EARTH OBJECTS: PRELIMINARY RESULTS

    SciTech Connect

    Mainzer, A.; Bauer, J.; Masiero, J.; Eisenhardt, P.; Grav, T.; Mo, W.; McMillan, R. S.; Cutri, R. M.; Walker, R.; Wright, E.; Tholen, D. J.; Jedicke, R.; Denneau, L.; Spahr, T.; DeBaun, E.; Elsbury, D.; Gautier, T.; Gomillion, S.; Hand, E.; Watkins, J.; and others

    2011-12-20

    With the NEOWISE portion of the Wide-field Infrared Survey Explorer (WISE) project, we have carried out a highly uniform survey of the near-Earth object (NEO) population at thermal infrared wavelengths ranging from 3 to 22 {mu}m, allowing us to refine estimates of their numbers, sizes, and albedos. The NEOWISE survey detected NEOs the same way whether they were previously known or not, subject to the availability of ground-based follow-up observations, resulting in the discovery of more than 130 new NEOs. The survey's uniform sensitivity, observing cadence, and image quality have permitted extrapolation of the 428 near-Earth asteroids (NEAs) detected by NEOWISE during the fully cryogenic portion of the WISE mission to the larger population. We find that there are 981 {+-} 19 NEAs larger than 1 km and 20,500 {+-} 3000 NEAs larger than 100 m. We show that the Spaceguard goal of detecting 90% of all 1 km NEAs has been met, and that the cumulative size distribution is best represented by a broken power law with a slope of 1.32 {+-} 0.14 below 1.5 km. This power-law slope produces {approx}13, 200 {+-} 1900 NEAs with D > 140 m. Although previous studies predict another break in the cumulative size distribution below D {approx} 50-100 m, resulting in an increase in the number of NEOs in this size range and smaller, we did not detect enough objects to comment on this increase. The overall number for the NEA population between 100 and 1000 m is lower than previous estimates. The numbers of near-Earth comets and potentially hazardous NEOs will be the subject of future work.

  11. Preliminary results of hydrogeologic investigations Humboldt River Valley, Winnemucca, Nevada

    USGS Publications Warehouse

    Cohen, Philip M.

    1964-01-01

    . The resulting increase of the stage of the river causes the river to lose large amounts of water by infiltration to the ground-water reservoir in the study area. In addition, there is much recharge to the ground-water reservoir in the spring and early summer as a result of seepage losses from irrigation ditches and the downward percolation of some of the excess water applied for irrigation. The average net increase of ground water in storage in the deposits beneath and adjacent to the flood plain of the Humboldt River during the spring and early summer is about 10,000 acre-feet.

  12. Electromagnetic-Tracked Biopsy under Ultrasound Guidance: Preliminary Results

    SciTech Connect

    Hakime, Antoine Deschamps, Frederic; Marques De Carvalho, Enio Garcia; Barah, Ali; Auperin, Anne; Baere, Thierry De

    2012-08-15

    Purpose: This study was designed to evaluate the accuracy and safety of electromagnetic needle tracking for sonographically guided percutaneous liver biopsies. Methods: We performed 23 consecutive ultrasound-guided liver biopsies for liver nodules with an electromagnetic tracking of the needle. A sensor placed at the tip of a sterile stylet (18G) inserted in a coaxial guiding trocar (16G) used for biopsy was localized in real time relative to the ultrasound imaging plane, thanks to an electromagnetic transmitter and two sensors on the ultrasound probe. This allows for electronic display of the needle tip location and the future needle path overlaid on the real-time ultrasound image. Distance between needle tip position and its electronic display, number of needle punctures, number of needle pull backs for redirection, technical success (needle positioned in the target), diagnostic success (correct histopathology result), procedure time, and complication were evaluated according to lesion sizes, depth and location, operator experience, and 'in-plane' or 'out-of-plane' needle approach. Results: Electronic display was always within 2 mm from the real position of the needle tip. The technical success rate was 100%. A single needle puncture without repuncture was used in all patients. Pull backs were necessary in six patients (26%) to obtain correct needle placement. The overall diagnostic success rate was 91%. The overall true-positive, true-negative, false-negative, and failure rates of the biopsy were 100% (19/19) 100% (2/2), 0% (0/23), and 9% (2/23). The median total procedure time from the skin puncture to the needle in the target was 30 sec (from 5-60 s). Lesion depth and localizations, operator experience, in-plane or out-of-plane approach did not affect significantly the technical, diagnostic success, or procedure time. Even when the tumor size decreased, the procedure time did not increase. Conclusions: Electromagnetic-tracked biopsy is accurate to determine

  13. Preliminary Seafloor Controlled Source EM Results From APPLE

    NASA Astrophysics Data System (ADS)

    Behrens, J. P.; MacGregor, L.; Constable, S.; Everett, M.

    2001-12-01

    Certain events in the life cycle of oceanic lithosphere are dominantly two-dimensional. These include formation of crust at axial spreading centers and deformation at the lithosphere - asthenosphere boundary. These processes may result in an electrically anisotropic oceanic lithosphere by creating conductive pathways in preferred orientations. Controlled Source Electromagnetic (CSEM) soundings and Magnetotelluric (MT) soundings were made during the Anisotropy and Physics of the Pacific Lithosphere Experiment (APPLE), carried out in February/March 2001 approximately 600 km west of San Diego, California. Twenty seafloor electromagnetic field sensors were deployed: 4 long-wire CSEM recorders with 200 m electrode offsets, 6 high-frequency MT/CSEM recorders with two orthogonal 10 m offset electrodes and two orthogonal induction coil magnetometers, and 10 low-frequency MT recorders with a three-component fluxgate magnetometer and two orthogonal 10 m electric dipoles, 5 of which also recorded CSEM data. Every instrument was recovered, with data, during this primary cruise and a follow-up recovery cruise for the long-period instruments in August 2001. The deep-towed EM transmitter (DASI) was a 100 m horizontal electric dipole, which was towed in a 30 km radius circle around a central core of recorders. A radial tow was also performed. DASI transmitted a 4 Hz square wave throughout the CSEM phase of the experiment. Initial processing of the CSEM data reveals evidence of crustal anisotropy. In particular, transmitted electromagnetic energy is attenuated more strongly when propagating from west to east than from north to south. The difference in attenuation is about a factor of two, at a range of 30 km and a frequency of 4Hz. This confirms earlier results from the PEGASUS experiment, which proposed that oceanic lower crust and upper mantle with east-west trending lineaments of increased conductivity will exhibit greater attenuation of electric fields in the east

  14. Preliminary results from the heavy ions in space experiment

    NASA Technical Reports Server (NTRS)

    Adams, James H., Jr.; Beahm, Lorraine P.; Tylka, Allan J.

    1992-01-01

    The Heavy Ions In Space (HIIS) experiment has two primary objectives: (1) to measure the elemental composition of ultraheavy galactic cosmic rays, beginning in the tin-barium region of the periodic table; and (2) to study heavy ions which arrive at LDEF below the geomagnetic cutoff, either because they are not fully stripped of electrons or because their source is within the magnetosphere. Both of these objectives have practical as well as astrophysical consequences. In particular, the high atomic number of the ultraheavy galactic cosmic rays puts them among the most intensely ionizing particles in Nature. They are therefore capable of upsetting electronic components normally considered immune to such effects. The below cutoff heavy ions are intensely ionizing because of their low velocity. They can be a significant source of microelectronic anomalies in low inclination orbits, where Earth's magnetic field protects satellites from most particles from interplanetary space. The HIIS results will lead to significantly improved estimates of the intensely ionizing radiation environment.

  15. Geochemistry of shale groundwaters: Results of preliminary laboratory leaching experiments

    SciTech Connect

    Von Damm, K.L.; Johnson, K.O.

    1987-09-01

    Twelve shales were reacted with distilled water at 20/sup 0/C and 100/sup 0/C; the composition of the waters and the mineralogy were determined before and after reaction. The experiments were conducted in a batch mode over a period of approximately 40 days. Major changes occurred in the solution chemistry; in most cases sulfate became the dominant anion while either sodium or calcium was the major cation. The high sulfate is most likely a result of the oxidation of pyrite in the samples. In the 100/sup 0/C experiments some of the solutions became quite acidic. Examination of the observed mineralogy and comparison to the mineral assemblage calculated to be in equilibrium with the experimentally determined waters, suggests that the acidic waters are generated when no carbonate minerals remain to buffer the groundwaters to a more neutral pH. The pH of shale waters will be determined by the balance between the oxidation of pyrite and organic matter and the dissolution of carbonate minerals. The experimental data are helping to elucidate the chemical reactions that control the pH of shale groundwaters, a critical parameter in determining other water-rock and waste-water-rock interactions and ultimate solute mobility. An experimental approach also provides a means of obtaining data for shales for which no groundwater data are available as well as data on chemical species which are not usually determined or reported.

  16. Magnetic field studies by voyager 1: preliminary results at saturn.

    PubMed

    Ness, N F; Acuña, M H; Lepping, R P; Connerney, J E; Behannon, K W; Burlaga, L F; Neubauer, F M

    1981-04-10

    Magnetic field studies by Voyager 1 have confirmed and refined certain general features of the Saturnian magnetosphere and planetary magnetic field established by Pioneer 11 in 1979. The main field of Saturn is well represented by a dipole of moment 0.21 +/- 0.005 gauss-R(s)(3) (where 1 Saturn radius, R(s), is 60,330 kilometers), tilted 0.7 degrees +/- 0.35 degrees from the rotation axis and located within 0.02 R(s) of the center of the planet. The radius of the magnetopause at the subsolar point was observed to be 23 R(s) on the average, rather than 17 R(s). Voyager 1 discovered a magnetic tail of Saturn with a diameter of approximately 80 R(s). This tail extends away from the Sun and is similar to type II comet tails and the terrestrial and Jovian magnetic tails. Data from the very close flyby at Titan (located within the Saturnian magnetosphere) at a local time of 1330, showed an absence of any substantial intrinsic satellite magnetic field. However, the results did indicate a very well developed, induced magnetosphere with a bipolar magnetic tail. The upper limit to any possible internal satellite magnetic moment is 5 x 10(21) gauss-cubic centimeter, equivalent to a 30-nanotesla equatorial surface field.

  17. Magnetic field studies by voyager 2: preliminary results at saturn.

    PubMed

    Ness, N F; Acuna, M H; Behannon, K W; Burlaga, L F; Connerney, J E; Lepping, R P; Neubauer, F M

    1982-01-29

    Further studies of the Saturnian magnetosphere and planetary magnetic field by Voyager 2 have substantiated the earlier results derived from Voyager 1 observations in 1980. The magnetic field is primarily that of a centered dipole (moment = 0.21 gauss-RS(3); where one Saturn radius, RS, is 60,330 kilometers) tilted approximately 0.8 degrees from the rotation axis. Near closest approach to Saturn, Voyager 2 traversed a kronographic longitude and latitude range that was complementary to that of Voyager 1. Somewhat surprisingly, no evidence was found in the data or the analysis for any large-scale magnetic anomaly in the northern hemisphere which could be associated with the periodic modulation of Saturnian kilometric radiation radio emissions. Voyager 2 crossed the magnetopause of a relatively compressed Saturnian magnetosphere at 18.5 RS while inbound near the noon meridian. Outbound, near the dawn meridian, the magnetosphere had expanded considerably and the magnetopause boundary was not observed until the spacecraft reached 48.4 to 50.9 RS and possibly beyond. Throughout the outbound magnetosphere passage, a period of 46 hours (4.5 Saturn rotations), the field was relatively steady and smooth showing no evidence for any azimuthal asymmetry or magnetic anomaly in the planetary field. We are thus left with a rather enigmatic situation to understand the basic source of Saturnian kilometric radiation modulation, other than the small dipole tilt.

  18. Magnetic field studies at jupiter by voyager 2: preliminary results.

    PubMed

    Ness, N F; Acuna, M H; Lepping, R P; Burlaga, L F; Behannon, K W; Neubauer, F M

    1979-11-23

    Data from the Goddard Space Flight Center magnetometers on Voyager 2 have yielded on inbound trajectory observations of multiple crossings of the bow shock and magnetosphere near the Jupiter-sun line at radial distances of 99 to 66 Jupiter radii (RJ) and 72 to 62 RJ, respectively. While outbound at a local hour angle of 0300, these distances increase appreciably so that at the time of writing only the magnetopause has been observed between 160 and 185 RJ. These results and the magnetic field geometry confirm the earlier conclusion from Voyager I studies that Jupiter has an enormous magnetic tail, approximately 300 to 400 RJ in diameter, trailing behind the planet with respect to the supersonic flow of the solar wind. Addi- tional observations of the distortion of the inner magnetosphere by a concentrated plasma show a spatial merging of the equatorial magnetodisk current with the cur- rent sheet in the magnetic tail. The spacecraft passed within 62,000 kilometers of Ganymede (radius = 2,635 kilometers) and observed characteristic fluctuations in- terpreted tentatively as being due to disturbances arising from the interaction of the Jovian magnetosphere with Ganymede.

  19. Eight Pulse Performance of DARHT Axis II - Preliminary Results

    SciTech Connect

    Schulze, Martin E.

    2015-12-08

    The DARHT-II accelerator produces a 1.65-kA, 17-MeV beam in a 1600-ns pulse. Standard operation of the DARHT Axis II accelerator involves extracting four short pulses from the 1.6 us long macro-pulse produced by the LIA. The four short pulses are extracted using a fast kicker in combination with a quadrupole septum magnet and then transported for several meters to a high-Z material target for conversion to x-rays for radiography. The ability of the DARHT Axis 2 kicker to produce more than the standard four pulse format has been previously demonstrated. This capability was developed to study potential risks associated with beam transport during an initial commissioning phase at low energy (8 MeV) and low current (1.0 kA).The ability of the kicker to deliver more than four pulses to the target has been realized for many years. This note describes the initial results demonstrating this capability.

  20. Auditory discrimination therapy (ADT) for tinnitus managment: preliminary results.

    PubMed

    Herraiz, C; Diges, I; Cobo, P; Plaza, G; Aparicio, J M

    2006-12-01

    This clinical assay has demonstrated the efficacy of auditory discrimination therapy (ADT) in tinnitus management compared with a waiting-list group. In all, 43% of the ADT patients improved their tinnitus, and its intensity together with its handicap were statistically decreased (EMB rating: B-2). To describe the effect of sound discrimination training on tinnitus. ADT designs a procedure to increase the cortical representation of trained frequencies (damaged cochlear areas with a secondary reduction of cortical stimulation) and to shrink the neighbouring over-represented ones (corresponding to tinnitus pitch). This prospective descriptive study included 14 patients with high frequency matched tinnitus. Tinnitus severity was measured according to a visual analogue scale (VAS) and the Tinnitus Handicap Inventory (THI). Patients performed a 10-min auditory discrimination task twice a day for 1 month. Discontinuous 8 kHz pure tones were randomly mixed with 500 ms 'white noise' sounds through a MP3 system. ADT group results were compared with a waiting-list group (n=21). In all, 43% of our patients had improvement in their tinnitus. A significant improvement in VAS (p=0.004) and THI mean scores was achieved (p=0.038). Statistical differences between ADT and the waiting-list group have been proved, considering patients' self-evaluations (p=0.043) and VAS scores (p=0.004). A non-significant reduction of THI was achieved (p=0.113).

  1. Steady-state flow of solid CO2: preliminary results

    USGS Publications Warehouse

    Durham, William B.; Kirby, Stephen H.; Stern, Laura A.

    1999-01-01

    To help answer the question of how much solid CO2 exists in the Martian south polar cap, we performed a series of laboratory triaxial deformation experiments at constant displacement rate in compression on jacketed cylinders of pure, polycrystalline CO2. Test conditions were temperatures 150 −8 ≤ ε ≤4.3×10−4 s−1. Most of the measurements follow a constitutive law of the form ε = Aσnexp(−Q/RT), where σ is the applied differential stress, R is the gas constant, and the other constants have values as follows: A = 103 86 MPa−ns−1, n = 5.6, and Q = 33 kJ/mol. Solid CO2 is markedly weaker than water ice. Our results suggest that the south polar cap on Mars is unlikely to be predominately solid CO2, because the elevation and estimated age of the cap is difficult to reconcile with the very weak rheology of the material.

  2. Telerobotic field geologist - Preliminary results of a feasibility study

    NASA Technical Reports Server (NTRS)

    Cole, Robert E.; Albert-Thenet, Charlotte; Taylor, G. J.; Johnson, Paul; Buzan, Forrest; Ishigo, Joy; Ikehara, Curtis

    1992-01-01

    Results of three laboratory studies conducted to explore the feasibility of developing a telerobot to perform planetary field geology are presented. A total of 72 college students attempted to match each of 15 geologic rock samples viewed either directly or on a TV screen with its matched pair contained in a matrix of 24 rocks which they viewed directly. The first study showed that rocks viewed on TV could be matched at levels well above chance, but significantly less than by direct view. Performance under remote view was improved by adding color and by magnifying the TV image. The second study showed a large decrease in performance when viewing a miniature LCK monitor as compared to a 19-in. CRT monitor of higher resolution. In the third study performance using the 2.9-in. LCK monitor showed only insignificant increases when images were presented in 3D view or when the rock was moved. It is suggested that it is feasible to conduct geologic observations with telerobots, and the critical role that image quality plays in determining performance is demonstrated.

  3. Real time evaluation of monolateral clubfoot with sonoelastography. Preliminary results

    PubMed Central

    Masala, Salvatore; Manenti, Guglielmo; Antonicoli, Marco; Morosetti, Daniele; Claroni, Giulia; Simonetti, Giovanni

    2012-01-01

    Summary Purpose: to assess the real time elastosonography (RTE) as a primary diagnostic tool for the evaluation of mechanical properties of Achilles tendons in patients affected by not surgically treated monolateral clubfoot. Materials and method: six patients were evaluated, four males and two females, mean age 1.2 ± 1.3 months, treated with Ponseti method, and afterward, they underwent RTE examination of the Achilles tendon in club-foot. A following ROI (region of interest) was positioned on the distal third of the tendon and the obtained data was examined retrospectively. Results: in the examined cohort of patients, the mean value ROI 1/mean value ROI 2 ratio was 2.0 ± 0.18, with an increased red area in the RTE evaluation of the affected tendon, while in the contralateral foot the mean observed value was 2.50 ± 2.1. Conclusion: RTE is a feasible and simple technique, which allows the study of the mechanical properties of Achilles tendons in children with clubfoot. PMID:23738274

  4. Preliminary Benchmarking Efforts and MCNP Simulation Results for Homeland Security

    SciTech Connect

    Robert Hayes

    2008-04-18

    It is shown in this work that basic measurements made from well defined source detector configurations can be readily converted in to benchmark quality results by which Monte Carlo N-Particle (MCNP) input stacks can be validated. Specifically, a recent measurement made in support of national security at the Nevada Test Site (NTS) is described with sufficient detail to be submitted to the American Nuclear Society’s (ANS) Joint Benchmark Committee (JBC) for consideration as a radiation measurement benchmark. From this very basic measurement, MCNP input stacks are generated and validated both in predicted signal amplitude and spectral shape. Not modeled at this time are those perturbations from the more recent pulse height light (PHL) tally feature, although what spectral deviations are seen can be largely attributed to not including this small correction. The value of this work is as a proof-of-concept demonstration that with well documented historical testing can be converted into formal radiation measurement benchmarks. This effort would support virtual testing of algorithms and new detector configurations.

  5. Preliminary Results on Compton Electrons in Silicon Drift Detector

    NASA Astrophysics Data System (ADS)

    Conka-Nurdan, T.; Nurdan, K.; Laihem, K.; Walenta, A. H.; Fiorini, C.; Freisleben, B.; Hornel, N.; Pavel, N. A.; Struder, L.

    2004-10-01

    Silicon drift detectors (SDD) with on-chip electronics have found many applications in different fields. A detector system has recently been designed and built to study the electrons from Compton scatter events in such a detector. The reconstruction of the Compton electrons is a crucial issue for Compton imaging. The equipment consists of a monolithic array of 19 channel SDDs and an Anger camera. Photons emitted from a finely collimated source undergo Compton scattering within the SDD where the recoil electron is absorbed. The scattered photon is subsequently observed by photoelectric absorption in the second detector. The coincidence events are used to get the energy, position, and direction of the Compton electrons. Because the on-chip transistors provide the first stage amplification, the SDDs provide outstanding noise performance and fast shaping, so that very good energy resolution can be obtained even at room temperature. The drift detectors require a relatively low number of readout channels for large detector areas. Custom-designed analog and digital electronics provide fast readout of the SDDs. The equipment is designed such that the measurements can be done in all detector orientations and kinematical conditions. The first results obtained with this detector system will be presented in this paper.

  6. Ionospheric scintillation observations over Kenyan region - Preliminary results

    NASA Astrophysics Data System (ADS)

    Olwendo, O. J.; Xiao, Yu; Ming, Ou

    2016-11-01

    Ionospheric scintillation refers to the rapid fluctuations in the amplitude and phase of a satellite signal as it passes through small-scale plasma density irregularities in the ionosphere. By analyzing ionospheric scintillation observation datasets from satellite signals such as GPS signals we can study the morphology of ionospheric bubbles. At low latitudes, the diurnal behavior of scintillation is driven by the formation of large-scale equatorial density depletions which form one to two hours after sunset via the Rayleigh-Taylor instability mechanism near the magnetic equator. In this work we present ionospheric scintillation activity over Kenya using data derived from a newly installed scintillation monitor developed by CRIRP at Pwani University (39.78°E, 3.24°S) during the period August to December, 2014. The results reveal the scintillation activity mainly occurs from post-sunset to post-midnight hours, and ceases around 04:00 LT. We also found that the ionospheric scintillation tends to appear at the southwest and northwest of the station. These locations coincide with the southern part of the Equatorial Ionization Anomaly crest over Kenya region. The occurrence of post-midnight L-band scintillation events which are not linked to pre-midnight scintillation observations raises fundamental question on the mechanism and source of electric fields driving the plasma depletion under conditions of very low background electron density.

  7. Preliminary results Skylab experiment TO27 optical contamination in space

    NASA Technical Reports Server (NTRS)

    Muscari, J. A.; Jambor, B. J.; Westcott, P. A.

    1974-01-01

    Current results from the TO27 experiment which was performed on the first two Skylab missions are presented. The purpose of the experiment was to determine the change in optical properties of various transmissive windows, mirrors, and diffraction gratings caused by the deposition of contaminants found about the orbital assembly and to measure the sky brightness background caused by solar illumination of particulate contaminants. The sample array system containing 248 optical surfaces and exposed outside the orbital workshop did not collect any significant contaminants. Only trace amounts of surface deposited contaminants have been seen, in all cases the measurement was near the limiting sensitivity of the instrument. Unfortunate performance compromises and the relative cleanliness of the assembly on the anti-solar side appeared to place the amount of available surface contaminants near the limiting sensitivity of the sample array. Mass spectroscopy on the trace contaminants show the presence of high molecular weight species, up to 773 amu. The data suggests the presence of condensed aromatics.

  8. Sound localization in patients with cochlear implant--preliminary results.

    PubMed

    Luntz, Michal; Brodsky, Alexander; Hafner, Hava; Shpak, Thalma; Feiglin, Hava; Pratt, Hillel

    2002-05-31

    To evaluate sound localization ability in patients with unilateral cochlear implant, who do not wear a hearing aid on the contralateral ear, and to try to improve this ability by training. Tertiary academic referral center. In the initial test, patients were exposed to sound stimuli from different directions and were asked to localize them. Following a training period the patients were re-evaluated by the same test. For each test, the percentage of correct answers and the final test score were calculated. In the initial test, the mean score of the study group of four cochlear implant users was 42.8 (out of a maximal score of 100), the mean rate of correct responses was 27.5%. Following a training period (6.5 sessions on the average), on the final test the mean score of the group was 74.3, while the mean rate of correct responses was 66.5%. The results demonstrated that patients with unilateral cochlear implant have some ability to localize sound, and that this ability may be improved by regular training.

  9. Preliminary results Skylab experiment TO27 optical contamination in space

    NASA Technical Reports Server (NTRS)

    Muscari, J. A.; Jambor, B. J.; Westcott, P. A.

    1974-01-01

    Current results from the TO27 experiment which was performed on the first two Skylab missions are presented. The purpose of the experiment was to determine the change in optical properties of various transmissive windows, mirrors, and diffraction gratings caused by the deposition of contaminants found about the orbital assembly and to measure the sky brightness background caused by solar illumination of particulate contaminants. The sample array system containing 248 optical surfaces and exposed outside the orbital workshop did not collect any significant contaminants. Only trace amounts of surface deposited contaminants have been seen, in all cases the measurement was near the limiting sensitivity of the instrument. Unfortunate performance compromises and the relative cleanliness of the assembly on the anti-solar side appeared to place the amount of available surface contaminants near the limiting sensitivity of the sample array. Mass spectroscopy on the trace contaminants show the presence of high molecular weight species, up to 773 amu. The data suggests the presence of condensed aromatics.

  10. The CoRoT Mission - Status and Preliminary Results

    NASA Astrophysics Data System (ADS)

    Fridlund, M.

    2007-08-01

    The CoRoT (Convection, Rotation and planetary Transits) space mission is the first dedicated space mission designed to search for exo-planets akin to our own. It is a joint effort by France, Austria Belgium, Brazil, Germany, Spain and the European Space Agency. It is specifically designed to search for exo-planets much smaller than hitherto discovered. It was launched in December 2006 on a mission lasting not less than 3 years. Verification and first operations have proven the mission to superceed all expectations. This is of course most relevant in the fact that planets as small as our own Earth are detectable. In this presentation we describe the experiences of the first 6 mo0nths of the mission, the actual status of the mission, the supporting ground based program, and what we expect in the near future. After giving examples of data relevant to the topic of this session, we turn to describing the expected impact of the results of CoRoT on future endeavours such as KEPLER, Extremely Large Telescopes (ELT's) and ultimately Darwin.

  11. Use of remote sensing in ecological research: preliminary results

    NASA Astrophysics Data System (ADS)

    Casucci, Francesca; Caporali, Enrica; Lebboroni, Marco; Profeti, Giuliana

    1998-12-01

    The spatial distribution of birds is an important parameter in the analysis of terrestrial systems; in this study its relationship with satellite-derived vegetation data has been demonstrated. In the present work four Landsat Thematic Mapper (TM) images were used to obtain the Normalized Difference Vegetation Index (NDVI) and the Leaf Water Content Index (LWCI), plus three structure indices based on a land use map. A hierarchical cluster analysis of these indices allowed the identification of four main clusters that were compared to the results of a set of vegetation and ornithological samples, taken in the period of May-June 1997. The procedure used in this study has allowed the individuation of environmental topologies with ecological relevance from satellite imagery. The typification of the environment leads to the formulation of faunistic prediction models in terms of ornithic composition. The avifauna predictability permits, at last, the set-up of proceedings for the environment quality evaluation in terrestrial systems, whenever standard scores for the species would be stated.

  12. Intravesical Sodium Chondroitin Sulphate to Treat Overactive Bladder: Preliminary Result.

    PubMed

    Irkilata, Lokman; Aydin, Mustafa; Riza Aydin, Hasan; Cihan Demirel, Hüseyin; Kadihasanoglu, Mustafa; Kemal Atilla, Mustafa

    2015-06-01

    This study aimed to verify the efficacy and safety of intravesical treatment with sodium chondroitin sulfate (CS) in patients with overactive bladder (OAB) who are refractory to previous antimuscarinic treatment. This study was performed between June 2012 and January 2015 and included 31 consecutive women (mean age, 42.10±7.34 years) with OAB who had been previously treated with two types of antimuscarinic drugs. The results of gynecologic and cystoscopic examinations were normal, and OAB comorbidity was absent. Treatment with intravesical instillations containing 40 mL CS (0.2%; 2 mg/mL) was administered for 6 weeks; after weekly treatments, monthly treatments were administered. The OAB-validated 8 (OAB-V8) symptom scores, nocturia, frequency, urgency, urge incontinence, and urinary volumes measured by uroflowmetry were evaluated for all the patients. The values obtained before the treatment were statistically compared with those obtained six months after the treatment. The duration of the symptoms was 18.36±6.19 months. A statistically significant improvement of the patients' conditions was observed in terms of the OAB-V8 symptom scores, nocturia, frequency, urgency, urge incontinence, and urinary volumes measured by uroflowmetry after the treatment. Despite the limitations of this study, the outcomes confirmed that CS therapy is safe and effective for the treatment of OAB.

  13. Pharyngeal Airway Changes after Bimaxillary Orthognathic Surgery--Preliminary Results.

    PubMed

    Stefanović, Neda Lj; Glišić, Branislav; Nikolić, Predrag V; Juloski, Jovana; Palomo, Juan Martin

    2015-01-01

    Dentofacial deformity, a deviation from normal facial proportions and dental relationships, is corrected by jaw repositioning in all three spatial planes, which changes the position and tension of the surrounding tissues, bones and muscles. These changes may also affect the dimensions of the pharyngeal airways (PA). The aim of this study was to evaluate and compare three-dimensional PA changes in patients treated by a combination mandibular set-back/maxillary advancement versus patients that had bimaxillary advancement with genioplasty. The sample consisted of 7 patients treated by combined mandibular set-back/maxillary advancement and 7 patients treated with bimaxillary advancement surgery. Nasopharyngeal (NP) volume, oropharyngeal (OP) volume and the area of maximum constriction (AMC) in the OP were measured on CBCT scans (2 mA/120 kV/12" FOV) taken before (T1) and 3 months after surgery (T2). Paired samples t-test was used for analyzing statistical significance of changes (p ≤ 0.05). OP volume and AMC increase after bimaxillary advancement was statistically significant, while for the mandibular set-back group the increase was non-significant. NP volume was not reduced in any of the two groups. No significant differences in PA dimensions were found between groups at neither T1 nor T2 time points. Results suggest that the combination of mandibular set-back/maxillary advancement did not reduce airway dimensions, while bimaxillary advancement surgery led to a statistically significant increase in the OP dimensions.

  14. Telerobotic field geologist - Preliminary results of a feasibility study

    NASA Technical Reports Server (NTRS)

    Cole, Robert E.; Albert-Thenet, Charlotte; Taylor, G. J.; Johnson, Paul; Buzan, Forrest; Ishigo, Joy; Ikehara, Curtis

    1992-01-01

    Results of three laboratory studies conducted to explore the feasibility of developing a telerobot to perform planetary field geology are presented. A total of 72 college students attempted to match each of 15 geologic rock samples viewed either directly or on a TV screen with its matched pair contained in a matrix of 24 rocks which they viewed directly. The first study showed that rocks viewed on TV could be matched at levels well above chance, but significantly less than by direct view. Performance under remote view was improved by adding color and by magnifying the TV image. The second study showed a large decrease in performance when viewing a miniature LCK monitor as compared to a 19-in. CRT monitor of higher resolution. In the third study performance using the 2.9-in. LCK monitor showed only insignificant increases when images were presented in 3D view or when the rock was moved. It is suggested that it is feasible to conduct geologic observations with telerobots, and the critical role that image quality plays in determining performance is demonstrated.

  15. Methane in permafrost - Preliminary results from coring at Fairbanks, Alaska

    USGS Publications Warehouse

    Kvenvolden, K.A.; Lorenson, T.D.

    1993-01-01

    Permafrost has been suggested as a high-latitude source of methane (a greenhouse gas) during global warming. To begin to assess the magnitude of this source, we have examined the methane content of permafrost in samples from shallow cores (maximum depth, 9.5m) at three sites in Fairbanks, Alaska, where discontinuous permafrost is common. These cores sampled frozen loess, peat, and water (ice) below the active layer. Methane contents of permafrost range from <0.001 to 22.2mg/kg of sample. The highest methane content of 22.2mg/kg was found in association with peat at one site. Silty loess had high methane contents at each site of 6.56, 4.24, and 0.152mg/kg, respectively. Carbon isotopic compositions of the methane (??13C) ranged from -70.8 to -103.9 ???, and hydrogen isotopic compositions of the methane (??D) from -213 to -313 ???, indicating that the methane is microbial in origin. The methane concentrations were used in a one dimensional heat conduction model to predict the amount of methane that will be released from permafrost worldwide over the next 100 years, given two climate change scenarios. Our results indicate that at least 30 years will elapse before melting permafrost releases important amounts of methane; a maximum methane release rate will be about 25 to 30 Tg/yr, assuming that methane is generally distributed in shallow permafrost as observed in our samples.

  16. Ultrasound-only dosimetry for prostate brachytherapy: preliminary phantom results

    NASA Astrophysics Data System (ADS)

    Wen, Xu; Salcudean, S. E.; Lawrence, P. D.; Morris, J.

    2007-03-01

    Accurate and fast seed localization plays a key role in computing dosimetry for prostate brachytherapy. Because transrectal ultrasound is the primary imaging modality providing the guidance for prostate brachytherapy, an ultrasound-only approach for dosimetry would offer many benefits. In this paper, we propose an ultrasound only dosimetry solution, in which the brachytherapy seeds are located in reflected power images computed from ultrasonic radio frequency signals and the boundary of the prostate is delineated from B-mode TRUS and vibroelastography images as the prostate is stiffer than the surrounding tissue. The location of the implanted seeds relative to the prostate boundary is thus obtained. As only one imaging modality, ultrasound, is used, image registration is easy to implement. A prostate phantom with seeds embedded within it was built to evaluate the proposed approach. To measure the seed localization accuracy in the reflected power images, the phantom was scanned by CT as well. Experimental results show that the implanted seeds can be successfully located in the reflected power images with high contrast and accuracy, and that the contour of the "prostate" can be detected in the ultrasound vibro-elastography images outside the shadow of the seeds.

  17. Solar System Observations with Spitzer Space Telescope: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Cruikshank, Dale P.

    2005-01-01

    The programs of observations of Solar System bodies conducted in the first year of the operation of the Spitzer Space Telescope as part of the Guaranteed Observing Time allocations are described. Initial results include the determination of the albedos of a number of Kuiper Belt objects and Centaurs from observations of their flux densities at 24 and 70 microns, and the detection of emission bands in the spectra of several distant asteroids (Trojans) around 10 and 25 microns. The 10 Kuiper Belt objects observed to date have albedos in the range 0.08 - 0.15, significantly higher than the earlier estimated 0.04. An additional KBO [(55565) 2002 AW(sub l97)] has an albedo of 0.17 plus or minus 0.03. The emission bands in the asteroid spectra are indicative of silicates, but specific minerals have not yet been identified. The Centaur/comet 29P/Schwassmann-Wachmann 1 has a nucleus surface albedo of 0.025 plus or minus 0.01, and its dust production rate was calculated from the properties of the coma. Several other investigations are in progress as the incoming data are processed and analyzed.

  18. [Discontinuous warm cardioplegia in pediatric cardiac surgery: preliminary results].

    PubMed

    Durandy, Y; Hulin, S

    2006-02-01

    This article describes the use of warm cardioplegia in paediatric surgery. Warm blood enriched with potassium was injected every 15 minutes during aortic clamping in 770 operations. The efficacy and quality of this technique were assessed by the return of cardiac electrical activity, troponin I levels 12 hours after aortic clamping and the duration of postoperative ventilation in 3 groups of patients: ventricular septal defect under 6 months (N = 82), tetralogy of Fallot under one year (N = 55), simple transposition of the great arteries (N = 42). These results were compared retrospectively with those obtained using cold cardioplegia. The return of sinus rhythm was spontaneous in 99% of cases versus 77% with cold cardioplegia; the troponin I levels were under 10 ng/ml in 46% of cases versus 37% (NS). Patients operated for ventricular septal defect were ventilated 10 +/- 8 hours versus 13 +/- 10 hours with cold cardioplegia (p = 0.02). The children operated for tetralogy of Fallot were ventilated 8 +/- 4 hours versus 14 +/- 7 hours (p = 0.01) and those with simple transposition 56 +/- 71 hours versus 83 +/- 105 hours (NS). Warm cardioplegia, in the authors' experience, was associated with an improved postoperative course. In this group of 770 operations, 646 operated patients had a stay of less than two days in the intensive care unit.

  19. MIF in Volcanic Sulfate: Preliminary Results From Greenland Ice Cores

    NASA Astrophysics Data System (ADS)

    Lanciki, A. L.; Cole-Dai, J.; Savarino, J.; Thiemens, M.

    2008-12-01

    Sulfur dioxide from natural and anthropogenic sources is oxidized in the atmosphere to form sulfuric acid aerosols. These aerosols contribute to acid rain, global climate variations, and are a health hazard to humans. Sulfuric acid aerosols in the stratosphere may also affect ozone levels. Volcanic eruptions are a natural source of sulfur dioxide, but depending on the height of the eruption plume, an eruption can be either tropospheric or stratospheric. It has been found in Antarctic ice cores that sulfate from a stratospheric eruption contains sulfur-33 MIF anomaly, while there is no anomaly when sulfur dioxide is oxidized in the troposphere. The unique sulfur MIF signature for stratospheric eruptions could be a valuable tool to identify large, climate-impacting stratospheric eruptions in ice core records. Modeling studies suggest that the main cause of this sulfur MIF is photochemical reactions induced by high-energy UV light below 310 nm. This is consistent with the Antarctica ice core results that the sulfur anomaly is found only in eruptions that emitted sulfur dioxide directly into the stratosphere, where substantial UV radiation is available. In this work, volcanic sulfate from a few volcanic eruptions has been extracted from a number of Greenland ice cores and analyzed for sulfur anomaly. For the first time, MIF anomaly has been found in the sulfate of a known stratospheric eruption (the 1815 Tambora eruption) preserved in the Northern Hemisphere. These latest data show that the pattern of sulfur anomaly evolution during the deposition of volcanic sulfate is similar at both polar regions. This provides further evidence that sulfur MIF anomaly is generated by photochemical reactions and dynamic processes in the global stratosphere.

  20. Adaptive sound speed correction for abdominal ultrasonography: preliminary results

    NASA Astrophysics Data System (ADS)

    Jin, Sungmin; Kang, Jeeun; Song, Tai-Kyung; Yoo, Yangmo

    2013-03-01

    Ultrasonography has been conducting a critical role in assessing abdominal disorders due to its noninvasive, real-time, low cost, and deep penetrating capabilities. However, for imaging obese patients with a thick fat layer, it is challenging to achieve appropriate image quality with a conventional beamforming (CON) method due to phase aberration caused by the difference between sound speeds (e.g., 1580 and 1450m/s for liver and fat, respectively). For this, various sound speed correction (SSC) methods that estimate the accumulated sound speed for a region-of interest (ROI) have been previously proposed. However, with the SSC methods, the improvement in image quality was limited only for a specific depth of ROI. In this paper, we present the adaptive sound speed correction (ASSC) method, which can enhance the image quality for whole depths by using estimated sound speeds from two different depths in the lower layer. Since these accumulated sound speeds contain the respective contributions of layers, an optimal sound speed for each depth can be estimated by solving contribution equations. To evaluate the proposed method, the phantom study was conducted with pre-beamformed radio-frequency (RF) data acquired with a SonixTouch research package (Ultrasonix Corp., Canada) with linear and convex probes from the gel pad-stacked tissue mimicking phantom (Parker Lab. Inc., USA and Model539, ATS, USA) whose sound speeds are 1610 and 1450m/s, respectively. From the study, compared to the CON and SSC methods, the ASSC method showed the improved spatial resolution and information entropy contrast (IEC) for convex and linear array transducers, respectively. These results indicate that the ASSC method can be applied for enhancing image quality when imaging obese patients in abdominal ultrasonography.

  1. Preliminary results on noncollocated torque control of space robot actuators

    NASA Technical Reports Server (NTRS)

    Tilley, Scott W.; Francis, Colin M.; Emerick, Ken; Hollars, Michael G.

    1989-01-01

    In the Space Station era, more operations will be performed robotically in space in the areas of servicing, assembly, and experiment tending among others. These robots may have various sets of requirements for accuracy, speed, and force generation, but there will be design constraints such as size, mass, and power dissipation limits. For actuation, a leading motor candidate is a dc brushless type, and there are numerous potential drive trains each with its own advantages and disadvantages. This experiment uses a harmonic drive and addresses some inherent limitations, namely its backdriveability and low frequency structural resonances. These effects are controlled and diminished by instrumenting the actuator system with a torque transducer on the output shaft. This noncollocated loop is closed to ensure that the commanded torque is accurately delivered to the manipulator link. The actuator system is modelled and its essential parameters identified. The nonlinear model for simulations will include inertias, gearing, stiction, flexibility, and the effects of output load variations. A linear model is extracted and used for designing the noncollocated torque and position feedback loops. These loops are simulated with the structural frequency encountered in the testbed system. Simulation results are given for various commands in position. The use of torque feedback is demonstrated to yield superior performance in settling time and positioning accuracy. An experimental setup being finished consists of a bench mounted motor and harmonic drive actuator system. A torque transducer and two position encoders, each with sufficient resolution and bandwidth, will provide sensory information. Parameters of the physical system are being identified and matched to analytical predictions. Initial feedback control laws will be incorporated in the bench test equipment and various experiments run to validate the designs. The status of these experiments is given.

  2. No Detectable Hypoxia in Malignant Salivary Gland Tumors: Preliminary Results

    SciTech Connect

    Wijffels, Karien; Hoogsteen, Ilse J.; Lok, Jasper; Rijken, Paulus F.J.W.; Marres, Henri A.M.; Wilde, Peter C.M. de; Kogel, Albert J. van der; Kaanders, Johannes H.A.M.

    2009-04-01

    Purpose: Hypoxia is detected in most solid tumors and is associated with malignant progression and adverse treatment outcomes. However, the oxygenation status of malignant salivary gland tumors has not been previously studied. The aim of this study was to investigate the potential clinical relevance of hypoxia in this tumor type. Methods and Materials: Twelve patients scheduled for surgical resection of a salivary gland tumor were preoperatively injected with the hypoxia marker pimonidazole and the proliferation marker iododeoxyuridine. Tissue samples of the dissected tumor were immunohistochemically stained for blood vessels, pimonidazole, carbonic anhydrase-IX, glucose transporters-1 and -3 (Glut-1, Glut-3), hypoxia-inducible factor-1{alpha}, iododeoxyuridine, and epidermal growth factor receptor. The tissue sections were quantitatively assessed by computerized image analysis. Results: The tissue material from 8 patients was of sufficient quality for quantitative analysis. All tumors were negative for pimonidazole binding, as well as for carbonic anhydrase-IX, Glut-1, Glut-3, and hypoxia-inducible factor-1{alpha}. The vascular density was high, with a median value of 285 mm{sup -2} (range, 209-546). The iododeoxyuridine-labeling index varied from <0.1% to 12.2% (median, 2.2%). Epidermal growth factor receptor expression levels were mostly moderate to high. In one-half of the cases, nuclear expression of epidermal growth factor receptor was observed. Conclusion: The absence of detectable pimonidazole binding, as well as the lack of expression of hypoxia-associated proteins in all tumors, indicates that malignant salivary gland tumors are generally well oxygenated. It is unlikely that hypoxia is a relevant factor for their clinical behavior and treatment responsiveness.

  3. Preliminary Results from Coordinated UVCS-CDS-Ulysses Observations

    NASA Technical Reports Server (NTRS)

    Parenti, S.; Bromage, B. J.; Poletto, G.; Suess, S. T.; Raymond, J. C.; Noci, G.; Bromage, G. E.; Rose, M. Franklin (Technical Monitor)

    2001-01-01

    The June 2000 quadrature between the Sun, Earth, and Ulysses took place with Ulysses at a distance of 3.35 AU from the Sun and at heliocentric latitude 58.2 deg south, in the southeast quadrant. This provided an opportunity to observe the corona close to the Sun with Coronal Diagnostic Spectrometer (CDS) and Ultraviolet Coronograph Spectrometer (UVCS) and, subsequently, to sample the same plasma when it reached Ulysses. Here we focus on simultaneous observations of UVCS and CDS made on June 12, 13, 16 and 17. The UVCS data were acquired at heliocentric altitudes ranging from 1.6 to 2.2 solar radii, using different grating positions, in order to get a wide wavelength range. CDS data consisted of Normal Incidence Spectrometer (NIS) full wavelength rasters of 120" x 150" centered at altitudes up to 1.18 solar radii, together with Grazing Incidence Spectrometer (GIS) 4" x 4" rasters within the same field of view, out to 1.2 solar radii. The radial direction to Ulysses passed through a high latitude streamer, throughout the 4 days of observations, Analysis of the spectra taken by UVCS shows a variation of the element abundances in the streamer over our observing interval: however, because the observations were in slightly different parts of the streamer on different days, the variation could be ascribed either to a temporal or spatial effect. The oxygen abundance, however, seems to increase at the edge of the streamer, as indicated by previous analyses. This suggests the variation may be a function of position within the streamer, rather than a temporal effect. Oxygen abundances measured by SWICS on Ulysses are compared with the CDS and UVCS results to see whether changes measured in situ follow the same pattern.

  4. Preliminary results from two international pluvial flood event studies

    NASA Astrophysics Data System (ADS)

    Roezer, Viktor; Spekkers, Matthieu; Kreibich, Heidi

    2016-04-01

    Pluvial floods have caused severe damages to urban dwellings in Europe and elsewhere in recent years. With a predicted increase in extreme weather events as well as an ongoing urbanization, pluvial flood damage is expected to increase in the future. These type of flood events, caused by stormwater being unable to enter urban drainage systems or flowing out of urban drainage systems when capacity is exceeded, often happen with little warning and in areas which are often not obviously prone to flooding. Up to now little research was done on the adverse consequences of pluvial floods, as empirical damage data of pluvial flooding is scarce. In this study, results of two telephone surveys are discussed. The surveys comprise interviews with more than 500 flood-affected households in Germany (Münster and Greven) and the Netherlands (Amsterdam), related to the severe rain event of July 28th 2014. Respondents were asked a series of questions about the damage to their building structure and contents, as well as on topics such as early warning, emergency and precautionary measures, building properties and hazard characteristics. The questionnaire was developed with the aim to create a harmonized transnational pluvial flood damage survey that can potentially be extended to other European countries. New indicator variables have been developed to account for different national and regional standards in building structure, early warning, socio-economic data and recovery. The survey data from the German and Dutch case studies are compared with the goal to identify similarities and differences in damage reducing factors and recovery. Water level data and other hazard characteristics are used to form comparable groups out of the German and Dutch sample. Within these groups, regional distinctions in building topology and use are expected to have the strongest impact on differences between reported damage amounts of the two case studies. The newly collected data will be used in

  5. Crawling wave detection of prostate cancer: preliminary in vitro results.

    PubMed

    An, Liwei; Mills, Bradley; Hah, Zaegyoo; Mao, Shuo; Yao, Jorge; Joseph, Jean; Rubens, Deborah J; Strang, John; Parker, Kevin J

    2011-05-01

    The focus of this article is to develop signal and imaging processing methods to derive an accurate estimation of local tissue elasticity using the crawling wave (CrW) sonoelastography method. The task is to reduce noise and to improve the contrast of the elasticity map. The protocol of the CrW approach was first tested on heterogeneous elastic phantoms as a model of prostate cancers. Then, the contrast-to-noise ratio of the estimation was calculated iteratively with various sequences of algorithms to determine the optimal signal processing settings. Finally, the optimized signal processing was applied to ex vivo prostate cancer detection. The comparison of the segmented elasticity map and the histology tumor outline was made by quadrants to evaluate the diagnostic performance of the protocol. Furthermore, the CrW approach was combined with amplitude-sonoelastography to achieve a higher specificity. This study demonstrated the feasibility of the proposed approach for clinical applications. In the application to ex vivo prostate cancer detection, the established approach was tested on 43 excised prostate glands. The combination of the CrW approach and amplitude-sonoelastography achieved an accuracy of over 80% for finding tumors larger than 4 mm in diameter. The elasticity values and contrast found by the CrW approach were in agreement with the previous results derived from mechanical testing. Crawling waves can be applied to detect prostate cancer with accuracy approaching 80% and can quantify the stiffness or shear modulus of both cancerous and noncancerous tissues. The technique therefore shows promise for guiding biopsies to suspect regions that are otherwise difficult to identify.

  6. Preliminary Results from Coordinated UVCS-CDS-Ulysses Observations

    NASA Technical Reports Server (NTRS)

    Parenti, S.; Bromage, B. J.; Poletto, G.; Suess, S. T.; Raymond, J. C.; Noci, G.; Bromage, G. E.; Rose, M. Franklin (Technical Monitor)

    2001-01-01

    The June 2000 quadrature between the Sun, Earth, and Ulysses took place with Ulysses at a distance of 3.35 AU from the Sun and at heliocentric latitude 58.2 deg south, in the southeast quadrant. This provided an opportunity to observe the corona close to the Sun with Coronal Diagnostic Spectrometer (CDS) and Ultraviolet Coronograph Spectrometer (UVCS) and, subsequently, to sample the same plasma when it reached Ulysses. Here we focus on simultaneous observations of UVCS and CDS made on June 12, 13, 16 and 17. The UVCS data were acquired at heliocentric altitudes ranging from 1.6 to 2.2 solar radii, using different grating positions, in order to get a wide wavelength range. CDS data consisted of Normal Incidence Spectrometer (NIS) full wavelength rasters of 120" x 150" centered at altitudes up to 1.18 solar radii, together with Grazing Incidence Spectrometer (GIS) 4" x 4" rasters within the same field of view, out to 1.2 solar radii. The radial direction to Ulysses passed through a high latitude streamer, throughout the 4 days of observations, Analysis of the spectra taken by UVCS shows a variation of the element abundances in the streamer over our observing interval: however, because the observations were in slightly different parts of the streamer on different days, the variation could be ascribed either to a temporal or spatial effect. The oxygen abundance, however, seems to increase at the edge of the streamer, as indicated by previous analyses. This suggests the variation may be a function of position within the streamer, rather than a temporal effect. Oxygen abundances measured by SWICS on Ulysses are compared with the CDS and UVCS results to see whether changes measured in situ follow the same pattern.

  7. [Endonasal and endocanalicular dacryocystorhinostomy by diode laser. Preliminary results].

    PubMed

    Alañón Fernández, M A; Alañón Fernández, F J; Martínez Fernández, A; Cárdenas Lara, M; Rodríguez Domínguez, R; Ballesteros Navarro, J M; Sainz Quevedo, M

    2004-04-01

    To describe the surgical technique and to evaluate the clinical results after having performed the transcanalicular and endocanalicular dacryocystorhinostomies by diode laser, including the advantages and limits of this technique. 34 were performed by diode laser in patients with clinical history of epiphora, with or without mucopurulent secretion, for nasolacrimal duct obstruction. The study was prospective, interventional, non randomized and non comparative. Diode laser was used to realize vaporization of lacrimal sac, osteotomy and vaporization with coagulation of nasal mucosa. The mean of surgical time was 15 minutes (range 7 to 29 minutes). Bicanalicular intubation was performed with a silicone tube and prolene filament for two months in all cases. Postsurgical follow-up was between 4 and 11 months. The degree of epiphora was evaluated by the Munk scale and lacrimal permeability was evaluated by endoscopic functional staining test in all cases. Out of the 34 DCR-EDN+ENC that were performed, 32 cases (94.11%) remain asymptomatic. Two of them (5.88%) required endonasal dacryocystorhinostomies by drilling, because the bony perforation was impossible to achieve by laser fiber. Two cases (5.88%) presented fibrosis and lacrimal and lower canaliculi obstruction, without epiphora because the superior canaliculi was permeable. Endonasal and endocanalicular dacryocystorhinostomy technique performed by diode laser is a valid method. It does not cause cutaneous scarring, it decreases thermic canalicular damage, it respects the lacrimal pump, it minimizes pain and bleeding, it needs less surgical time and it has turned into an out-patient procedure with a minimal surgical and postsurgical morbility.

  8. The Hyperspectral Thermal Emission Spectrometer (HyTES): Preliminary Results

    NASA Technical Reports Server (NTRS)

    Hook, Simon; Johnson, William R.; Eng, Bjorn T.; Gunapala, Sarah D.; Lamborn, Andrew U.; Mouroulis, Pantazis, Z.; Mouroulis, Pantazis, Z.; Paine, Christopher G.; Soibel, Alexander; Wilson, Daniel W.

    2011-01-01

    The Hyperspectral Thermal Emission Spectrometer (HyTES) is being developed as part of the risk reduction activities associated with the Hyperspectral Infrared Imager (HyspIRI). HyspIRI is one of the Tier 2 Decadal Survey Missions. HyTES will provide information on how to place the filters on the HyspIRI Thermal Infrared Instrument (TIR) as well as provide antecedent science data. The pushbroom design has 512 spatial pixels over a 50-degree field of view and 256 spectral channels between 7.5 micrometers to 12 micrometers. HyTES includes many key enabling state-of-the-art technologies including a high performance convex diffraction grating, a quantum well infrared photodetector (QWIP) focal plane array, and a compact Dyson-inspired optical design. The Dyson optical design allows for a very compact and optically fast system (F/1.6). It also minimizes cooling requirements due to the fact it has a single monolithic prism-like grating design which allows baffling for stray light suppression. The monolithic configuration eases mechanical tolerancing requirements which are a concern since the complete optical assembly is operated at cryogenic temperatures ((is) approximately 100K). The QWIP allows for optimum spatial and spectral uniformity and provides adequate responsivity or D-star to allow 200mK noise equivalent temperature difference (NEDT) operation across the LWIR passband. Assembly of the system is nearly complete. After completion, alignment results will be presented which show low keystone and smile distortion. This is required to minimize spatial-spectral mixing between adjacent spectral channels and spatial positions. Predictions show the system will have adequate signal to noise for laboratory calibration targets.

  9. Flight Test 4 Preliminary Results: NASA Ames SSI

    NASA Technical Reports Server (NTRS)

    Isaacson, Doug; Gong, Chester; Reardon, Scott; Santiago, Confesor

    2016-01-01

    Realization of the expected proliferation of Unmanned Aircraft System (UAS) operations in the National Airspace System (NAS) depends on the development and validation of performance standards for UAS Detect and Avoid (DAA) Systems. The RTCA Special Committee 228 is charged with leading the development of draft Minimum Operational Performance Standards (MOPS) for UAS DAA Systems. NASA, as a participating member of RTCA SC-228 is committed to supporting the development and validation of draft requirements as well as the safety substantiation and end-to-end assessment of DAA system performance. The Unmanned Aircraft System (UAS) Integration into the National Airspace System (NAS) Project conducted flight test program, referred to as Flight Test 4, at Armstrong Flight Research Center from April -June 2016. Part of the test flights were dedicated to the NASA Ames-developed Detect and Avoid (DAA) System referred to as JADEM (Java Architecture for DAA Extensibility and Modeling). The encounter scenarios, which involved NASA's Ikhana UAS and a manned intruder aircraft, were designed to collect data on DAA system performance in real-world conditions and uncertainties with four different surveillance sensor systems. Flight test 4 has four objectives: (1) validate DAA requirements in stressing cases that drive MOPS requirements, including: high-speed cooperative intruder, low-speed non-cooperative intruder, high vertical closure rate encounter, and Mode CS-only intruder (i.e. without ADS-B), (2) validate TCASDAA alerting and guidance interoperability concept in the presence of realistic sensor, tracking and navigational errors and in multiple-intruder encounters against both cooperative and non-cooperative intruders, (3) validate Well Clear Recovery guidance in the presence of realistic sensor, tracking and navigational errors, and (4) validate DAA alerting and guidance requirements in the presence of realistic sensor, tracking and navigational errors. The results will be

  10. The Hyperspectral Thermal Emission Spectrometer (HyTES): Preliminary Results

    NASA Technical Reports Server (NTRS)

    Hook, Simon; Johnson, William R.; Eng, Bjorn T.; Gunapala, Sarah D.; Lamborn, Andrew U.; Mouroulis, Pantazis, Z.; Mouroulis, Pantazis, Z.; Paine, Christopher G.; Soibel, Alexander; Wilson, Daniel W.

    2011-01-01

    The Hyperspectral Thermal Emission Spectrometer (HyTES) is being developed as part of the risk reduction activities associated with the Hyperspectral Infrared Imager (HyspIRI). HyspIRI is one of the Tier 2 Decadal Survey Missions. HyTES will provide information on how to place the filters on the HyspIRI Thermal Infrared Instrument (TIR) as well as provide antecedent science data. The pushbroom design has 512 spatial pixels over a 50-degree field of view and 256 spectral channels between 7.5 micrometers to 12 micrometers. HyTES includes many key enabling state-of-the-art technologies including a high performance convex diffraction grating, a quantum well infrared photodetector (QWIP) focal plane array, and a compact Dyson-inspired optical design. The Dyson optical design allows for a very compact and optically fast system (F/1.6). It also minimizes cooling requirements due to the fact it has a single monolithic prism-like grating design which allows baffling for stray light suppression. The monolithic configuration eases mechanical tolerancing requirements which are a concern since the complete optical assembly is operated at cryogenic temperatures ((is) approximately 100K). The QWIP allows for optimum spatial and spectral uniformity and provides adequate responsivity or D-star to allow 200mK noise equivalent temperature difference (NEDT) operation across the LWIR passband. Assembly of the system is nearly complete. After completion, alignment results will be presented which show low keystone and smile distortion. This is required to minimize spatial-spectral mixing between adjacent spectral channels and spatial positions. Predictions show the system will have adequate signal to noise for laboratory calibration targets.

  11. Antiresorptive Treatment for Spaceflight Induced Bone Atrophy - Preliminary Results

    NASA Technical Reports Server (NTRS)

    LeBlanc, Adrian; Matsumoto, toshio; Jones, Jeff; Shapiro, Jay; Lang, Thomas; Shackelford, Linda C.; Smith, Scott M.; Evans, Harlan J.; Spector, Elisabeth R.; Ploutz-Snyder, Robert; Sibonga, Jean; Nakamura, Toshitaka; Kohri, Kenjiro; Ohshima, Hiroshi

    2011-01-01

    Detailed measurements from the Mir and ISS long duration missions have documented losses in bone mineral density (BMD) from critical skeletal sub-regions. The most important BMD losses are from the femoral hip, averaging about -1.6%/mo integral to -2.3%/mo trabecular. Importantly these studies have documented the wide range in individual BMD loss from -0.5 to -5%/mo. Associated elevated urinary Ca increases the risk of renal stone formation during flight, a serious impact to mission success. To date, countermeasures have not been satisfactory. The purpose of this study is to determine if the combined effect of anti-resorptive drugs plus the standard in-flight exercise regimen will have a measurable effect on preventing space flight induced bone loss (mass and strength) and reducing renal stone risk. To date, 4 crewmembers have completed the flight portion of the protocol in which crewmembers take a 70-mg alendronate tablet once a week before and during flight, starting 17 days before launch. Compared to previous ISS crewmembers (n=14) not taking alendronate, DXA measurements of the spine, femur neck and total hip were significantly improved from -0.8 +/- 0.5%/mo to 1.0 +/- 1.1%/mo, -1.1 +/- 0.5%/mo to -0.2 +/- 0.3%/mo, -1.1 +/- 0.5%/mo to 0.04 +/- 0.3%/mo respectively. QCT-determined trabecular BMD of the femur neck, trochanter and total hip were significantly improved from -2.7 +/- 1.9%/mo to -0.2 +/- 0.8%/mo, -2.2 +/- 0.9%/mo to -0.3 +/- 1.9%/mo and -2.3 +/- 1.0%/mo to -0.2 +/- 1.8%/mo respectively. Significance was calculated from a one-tailed t test. Resorption markers were unchanged, in contrast to measurements from previous ISS crewmembers that showed typical increases of 50-100% above baseline. Urinary Ca showed no increase compared to baseline levels, also distinct from the elevated levels of 50% or greater in previous crews. While these results are encouraging, the current n (4) is small, and the large SDs indicate that, while the means are improved, there

  12. Diode laser supported partial nephrectomy in laparoscopic surgery: preliminary results

    NASA Astrophysics Data System (ADS)

    Sroka, Ronald; Hennig, Georg; Zillinberg, Katja; Khoder, Wael Y.

    2011-07-01

    Introduction: Warm ischemia and bleeding during laparoscopic partial nephrectomy place technical constraints on surgeons. Therefore it was the aim to develop a safe and effective laser assisted partial nephrectomy technique without need for ischemia. Patients and methods: A diode laser emitting light at 1318nm in cw mode was coupled into a bare fibre (core diameter 600 μm) thus able to transfer up to 100W to the tissue. After dry lab experience, a total of 8 patients suffering from kidney malformations underwent laparoscopic/retroperitoneoscopic partial nephrectomy. Clinically, postoperative renal function and serum c-reactive protein (CRP) were monitored. Laser induced coagulation depth and effects on resection margins were evaluated. Demographic, clinical and follow-up data are presented. Results: Overall interventions, the mean operative time was 116,5 minutes (range 60-175min) with mean blood loss of 238ml (range 50-600ml) while laser assisted resection of the kidney tissue took max 15min. After extirpation of the tumours all patients showed clinical favourable outcome during follow up period. The tumour size was measured to be 1.8 to 5cm. With respect to clinical safety and due to blood loos, two warm ischemia (19 and 24min) must be performed. Immediate postoperative serum creatinine and CRP were elevated within 0.1 to 0.6 mg/dl (mean 0.18 mg/dl) and 2.1-10 mg/dl (mean 6.24 mg/dl), respectively. The depth of the coagulation on the removed tissue ranged between <1 to 2mm without effect on histopathological evaluation of tumours or resection margin. As the surface of the remaining kidney surface was laser assisted coagulated after removal. The sealing of the surface was induced by a slightly larger coagulation margin, but could not measured so far. Conclusion: This prospective in-vivo feasibility study shows that 1318nm-diode laser assisted partial nephrectomy seems to be a safe and promising medical technique which could be provided either during open surgery

  13. Cloud radar deployment for Indian Monsoon observations: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Chakravarty, K.; Kalapureddy, M.; Pa, M.; Deshpandy, S.; Das, S.; Pandithurai, G.; Prabhakaran, T.; Chandrasekar, C. V.; Goswami, B.

    2013-12-01

    .04290 N, 73.86890 E, 1.35 km AMSL) from a scanning mobile platform since May, 2013. The initial results of the above cloud radar observations on Indian monsoon will be discussed.

  14. Preliminary Result of Optical Maturity of Small Rayed Lunar Craters

    NASA Astrophysics Data System (ADS)

    Suzuki, Shizuka; Honda, Chikatoshi; Hirata, Naru; Morota, Tomokatsu; Asada, Noriaki; Demura, Hirohide; Ogawa, Yoshiko; Kitazato, Kohei; Terazono, Jun-Ya; Ohtake, Makiko; Haruyama, Junichi; Matsunaga, Tsuneo

    The purpose of this research is to estimate the formation age of small rayed lunar craters which is composed of ejecta blanket derived from impact cratering by using OMAT (Optical MATuriry) parameter developed by Lucey et al. (2000) based on Clementine UV/VIS data. The OMAT parameter is the optical index of degree of space weathering which provides planetary surface materials with redding and darkened on spectral characteristics, and is defined as the Euclidean distance between the reflectance at 750 nm and the 950/750 nm ratio value. It has been suggested that OMAT value reduces as space weathering of lunar surface materials progresses with exposured time. Therefore, the OMAT parameter could be an index of relative surface age. However, it is necessary to examine detail correlation between OMAT parameter and surface age for constructing an OMAT model chronometer. Grier et al. (2001) have showed the correlation between average OMAT value as a function of distance from the crater center and formation age of each large crater more than about 20 km in diameter. In their result, we recognize that better correlation between the OMAT and the formation age of highland craters such as Giordano Bruno, Necho, and Tycho craters. On the other hand, in mare units, whether the craters have rays depends on not only OMAT but also the difference of reflectance between the rayed materials and substrate ground materials. So, it is difficult to distinguish a high OMAT rayed craters from other craters in the mare units. We focused on lunar craters in highland, and investigate the correlation between the formation ages of rayed craters (Giordano Bruno, Tycho, Byrgius A, Necho, and Jackson) estimated by crater counting or radiometric age of rock samples and OMAT values of these craters as a function of distance from the crater's center using Kaguya/MI (Multiband Imager) mosaic images which provide us with the reflectance of the lunar surface with topographic correction. Based on this

  15. Pediatric trainees' engagement in the online nutrition curriculum: preliminary results.

    PubMed

    Lewis, Kadriye O; Frank, Graeme R; Nagel, Rollin; Turner, Teri L; Ferrell, Cynthia L; Sangvai, Shilpa G; Donthi, Rajesh; Mahan, John D

    2014-09-16

    .004) compared to Module 1. Qualitative data also showed that completion of the interactive modules resulted in higher resident satisfaction. This initial assessment of the PNS modules shows that technology-mediated delivery of a nutrition curriculum in residency programs has great potential for providing rich learning environments for trainees while maintaining a high level of participant satisfaction.

  16. [Hungarian Heart Failure Registry 2015-2016. Preliminary results].

    PubMed

    Nyolczas, Noémi; Heltai, Krisztina; Borbély, Attila; Habon, Tamás; Járai, Zoltán; Sziliczei, Erzsébet; Stadler, Péter; Faludi, Réka; Herczeg, Béla; Papp, Előd; Lakatos, Ferenc; Nagy, Katalin; Katona, András; Kovács, Imre; Tomcsányi, János; Nagy, András; Sepp, Róbert

    2017-01-01

    Heart failure is associated with a poor prognosis despite significant advances in the pharmacological and device therapy and incurs very high cost because of frequent hospitalizations. Therefore, professional high-quality care is essential for both patients and the healthcare system. The best way to evaluate the quality of care for a particular disease is the use of disease-specific registries. Until now, there has not been a registry evaluating characteristics and management of heart failure patients in Hungary. For that reason, the Hungarian Society of Cardiology initiated the set-up of the Hungarian Heart Failure Registry. The Aim of this paper is to present the goals, methods and first year results of the Hungarian Heart Failure Registry. The goal of the Registry is to create a modern, web-based database that summarizes the data of large number of patients who are currently or were previously admitted to hospital or who are currently or were previously patients in an outpatient department due to severe heart failure (NYHA III-IV). Currently 17 cardiology departments participate in the development of the Registry. The planned number of patients is 2000. Initially follow-up was planned for one year (pilot study). After the evaluation of the relevant experiences of the pilot study, long-term follow-up is planned. The Registry collects information about the type of heart failure (heart failure with reduced - LVEF≤45% - vs. preserved - LVEF>45% - ejection fraction), etiology, co-morbidities, diagnostic methods, treatment as well as morbidity and mortality. After the first year, assessing the baseline parameters of 698 patients enrolled in the Registry we found that the majority of patients (87.8%) has heart failure with reduced ejection fraction and in 39.8% of the patients heart failure has an ischaemic origin. The most frequent co-morbidity was hypertension followed by diabetes, renal insufficiency and COPD. The patients were treated with ACE inhibitors or ARBs

  17. 77 FR 32498 - Certain Lined Paper Products From the People's Republic of China: Notice of Preliminary Results...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-01

    ... Preliminary Results of the Antidumping Duty Administrative Review and Preliminary Rescission, In Part AGENCY... Department of Commerce (``the Department'') is conducting the fifth administrative review of the antidumping... these preliminary results are adopted in our final results of this review, we will instruct U.S....

  18. EM techniques for archaeological laboratory experiments: preliminary results

    NASA Astrophysics Data System (ADS)

    Capozzoli, Luigi; De Martino, Gregory; Giampaolo, Valeria; Raffaele, Luongo; Perciante, Felice; Rizzo, Enzo

    2015-04-01

    model. The integration of electric and electromagnetic data allowed us to overcome the limits of each technique, especially in terms of resolution and depth, in humid/saturated conditions was investigated and the effectiveness of three-dimensional acquisitions was studied to better explore archeological sites and reduce the uncertainties related on the interpretation of geophysical analysis. The complexity of the relationship between archaeological features in the subsoil and their geophysical response requires efforts in the interpretation of resulting data. Reference Campana S. and Piro, S., (2009): Seeing the unseen - Geophysics and landscape archaeology., CRC Press, London, 2. No. of pages: 376. ISBN: 978-0-415-44721-8. Conyers, L. and Goodman, D., (1997): Ground-Penetrating Radar: An Introduction for Archaeologists. Walnut Creek, Calif.: AltaMira Press. Davis, J.L. and Annan, A.P. (1989): Ground-penetrating radar for high-resolution mapping of soil and rock stratigraphy. Geophysical Prospecting, 37, 531-551.

  19. Dating of polyhalite and langbeinite: preliminary results from German Zechstein

    NASA Astrophysics Data System (ADS)

    Neubauer, Franz; Schorn, Anja; Leitner, Christoph; Genser, Johann

    2013-04-01

    formation temperatures are given between 57.1 ° C or more commonly 83 ° C (e.g. Neitzel, 1992 and references therein), is mined as potash ore at the German Zechstein deposits. Neitzel (1992) summarized two main types of langbeinite formation (1) from kainite and halite (due to thermal metamorphism) and (2) from sylvinitic Hartsalz (= mixture of sylvite, kieserite and halite) due to solution metamorphism. The mineral might also form by decomposition of polyhalite to langbeinite and anhydrite during prograde metamorphism. In the following, we discuss the first successful results of polyhalite and langbeinite dating in Zechstein salts of Germany (Morsleben, Neuhof). Extremely fine-grained (grain sizes < 10 x 10 μm) recrystallised polyhalite from Morsleben gave an age of ca. 28.68 ± 0.11 Ma, which may represent the age of crystal growth from a brine. Dating of deformed langbeinite from a mylonite zone from Neuhof gave a slightly scattered age pattern at ca. 150 Ma, implying a major step of ductile flow of K-bearing evaporites and crystallization of langbeinite. From analytical point of view, langbeinite is very stable and allows diffusion experiments over a wide range of energies. References Fischer, S., Voigt, W., Köhnke, K., 1996. The thermal decomposition of polyhalite K2SO4 . MgSO4. 2 CaSO4. 2 H2O. Crystal Research and Technology, 31, 87-92. Freyer D., Voigt W., 2003. Crystallization and phase stability of CaSO4 and CaSO4-based salts. Monatshefte für Chemie, 134, 693-719. Leitner, C., Neubauer, F., Marschallinger, R., Genser, J., Bernroider, M., 2012. Origin of deformed halite hopper crystals, pseudomorphic anhydrite cubes and polyhalite in Alpine evaporites (Austria, Germany). International Journal of Earth Sciences, DOI 10.1007/s00531-012-0836-6. Neitzel, U., 1992. 100 Jahre Langbeinit. Kali und Steinsalz, 11/1, 7-13. Renne, P. R., Sharp, W. D. Montañez, I. P., Becker, R. A., Zierenberg, R. A., 2001. 40Ar/39Ar dating of Late Permian evaporites, southeastern New

  20. Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. I. First Results from a New Reverberation Mapping Campaign

    NASA Astrophysics Data System (ADS)

    Du, Pu; Hu, Chen; Lu, Kai-Xing; Wang, Fang; Qiu, Jie; Li, Yan-Rong; Bai, Jin-Ming; Kaspi, Shai; Netzer, Hagai; Wang, Jian-Min; SEAMBH Collaboration

    2014-02-01

    We report first results from a large project to measure black hole (BH) mass in high accretion rate active galactic nuclei (AGNs). Such objects may be different from other AGNs in being powered by slim accretion disks and showing saturated accretion luminosities, but both are not yet fully understood. The results are part of a large reverberation mapping (RM) campaign using the 2.4 m Shangri-La telescope at the Yunnan Observatory in China. The goals are to investigate the gas distribution near the BH and the properties of the central accretion disks, to measure BH mass and Eddington ratios, and to test the feasibility of using such objects as a new type of cosmological candles. The paper presents results for three objects, Mrk 335, Mrk 142, and IRAS F12397+3333, with Hβ time lags relative to the 5100 Å continuum of 10.6^{+1.7}_{-2.9}, 6.4^{+0.8}_{-2.2} and 11.4^{+2.9}_{-1.9} days, respectively. The corresponding BH masses are (8.3_{-3.2}^{+2.6})\\times 10^6\\,M_{\\odot }, (3.4_{-1.2}^{+0.5})\\times 10^6\\,M_{\\odot }, and (7.5_{-4.1}^{+4.3})\\times 10^6\\,M_{\\odot }, and the lower limits on the Eddington ratios are 0.6, 2.3, and 4.6 for the minimal radiative efficiency of 0.038. Mrk 142 and IRAS F12397+333 (extinction corrected) clearly deviate from the currently known relation between Hβ lag and continuum luminosity. The three Eddington ratios are beyond the values expected in thin accretion disks and two of them are the largest measured so far among objects with RM-based BH masses. We briefly discuss implications for slim disks, BH growth, and cosmology.

  1. Decision-Making in Flight with Different Convective Weather Information Sources: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Latorella, Kara A.; Chamberlain, James P.

    2004-01-01

    This paper reports preliminary and partial results of a flight experiment to address how General Aviation (GA) pilots use weather cues to make flight decisions. This research presents pilots with weather cue conditions typically available to GA pilots in visual meteorological conditions (VMC) and instrument meteorological conditions (IMC) today, as well as in IMC with a Graphical Weather Information System (GWIS). These preliminary data indicate that both VMC and GWIS-augmented IMC conditions result in better confidence, information sufficiency and perceived performance than the current IMC condition. For all these measures, the VMC and GWIS-augmented conditions seemed to provide similar pilot support. These preliminary results are interpreted for their implications on GWIS display design, training, and operational use guidelines. Final experimental results will compare these subjective data with objective data of situation awareness and decision quality.

  2. Hybrid microneedles devices for diagnostic and therapeutic applications: fabrication and preliminary results

    NASA Astrophysics Data System (ADS)

    Dardano, P.; Caliò, A.; Politi, J.; Di Palma, V.; Bevilacqua, M. F.; Rea, I.; Casalino, M.; Di Matteo, A.; Rendina, I.; De Stefano, L.

    2015-06-01

    Microneedles are newly developed biomedical devices, whose advantages are mainly in the non-invasiveness, discretion and versatility of use both as diagnostics and as therapeutics tool. In fact, they can be used both for drugs delivery in the interstitial fluids and for the analysis of the interstitial fluid. In this work we present the preliminary results for two devices based on micro needles in PolyEthylene (Glycol). The first for the drugs delivery includes a membrane whose optical reflected wavelength is related to the concentration of drug. Here, we present our preliminary result in diffusion of drugs between the membrane and the microneedles. The second device is gold coated and it works as electrode for the electrochemical detection of species in the interstitial fluid. A preliminary result in detection of glucose will be shown.

  3. The Fourier-Kelvin Stellar Interferometer (FKSI): A Progress Report and Preliminary Results from Our Laboratory Testbed

    NASA Technical Reports Server (NTRS)

    Berry, Richard; Rajagopa, J.; Danchi, W. C.; Allen, R. J.; Benford, D. J.; Deming, D.; Gezari, D. Y.; Kuchner, M.; Leisawitz, D. T.; Linfield, R.

    2005-01-01

    The Fourier-Kelvin Stellar Interferometer (FKSI) is a mission concept for an imaging and nulling interferometer for the near-infrared to mid-infrared spectral region (3-8 microns). FKSI is conceived as a scientific and technological pathfinder to TPF/DARWIN as well as SPIRIT, SPECS, and SAFIR. It will also be a high angular resolution system complementary to JWST. The scientific emphasis of the mission is on the evolution of protostellar systems, from just after the collapse of the precursor molecular cloud core, through the formation of the disk surrounding the protostar, the formation of planets in the disk, and eventual dispersal of the disk material. FKSI will also search for brown dwarfs and Jupiter mass and smaller planets, and could also play a very powerful role in the investigation of the structure of active galactic nuclei and extra-galactic star formation. We report additional studies of the imaging capabilities of the FKSI with various configurations of two to five telescopes, studies of the capabilities of FKSI assuming an increase in long wavelength response to 10 or 12 microns (depending on availability of detectors), and preliminary results from our nulling testbed.

  4. The Fourier-Kelvin Stellar Interferometer (FKSI): A Progress Report and Preliminary Results from Our Laboratory Testbed

    NASA Technical Reports Server (NTRS)

    Berry, Richard; Rajagopa, J.; Danchi, W. C.; Allen, R. J.; Benford, D. J.; Deming, D.; Gezari, D. Y.; Kuchner, M.; Leisawitz, D. T.; Linfield, R.

    2005-01-01

    The Fourier-Kelvin Stellar Interferometer (FKSI) is a mission concept for an imaging and nulling interferometer for the near-infrared to mid-infrared spectral region (3-8 microns). FKSI is conceived as a scientific and technological pathfinder to TPF/DARWIN as well as SPIRIT, SPECS, and SAFIR. It will also be a high angular resolution system complementary to JWST. The scientific emphasis of the mission is on the evolution of protostellar systems, from just after the collapse of the precursor molecular cloud core, through the formation of the disk surrounding the protostar, the formation of planets in the disk, and eventual dispersal of the disk material. FKSI will also search for brown dwarfs and Jupiter mass and smaller planets, and could also play a very powerful role in the investigation of the structure of active galactic nuclei and extra-galactic star formation. We report additional studies of the imaging capabilities of the FKSI with various configurations of two to five telescopes, studies of the capabilities of FKSI assuming an increase in long wavelength response to 10 or 12 microns (depending on availability of detectors), and preliminary results from our nulling testbed.

  5. A micro PPT for Cubesat application: Design and preliminary experimental results

    NASA Astrophysics Data System (ADS)

    Coletti, M.; Guarducci, F.; Gabriel, S. B.

    2011-08-01

    Cubesats, allowing for cheap access to space, are one of the fastest growing sectors in the space industry. A Pulsed Plasma Thruster to perform drag compensation for a Cubesat platform, with the aim of doubling the time needed for the Cubesat to naturally de-orbit (hence doubling its lifetime) is currently under development by Clyde Space Ltd., Mars Space Ltd. and the University of Southampton under an ESA funded project. In this paper the design of the thruster will be presented together with preliminary experimental results. The preliminary test results suggest that the thruster will be able to meet the mission requirements.

  6. Long range radio tracking of sea turtles and polar bear: Instrumentation and preliminary results

    NASA Technical Reports Server (NTRS)

    Baldwin, H. A.

    1972-01-01

    Instrumentation developed for studies of path behavior of the green sea turtle and migration movement of polar bear is described. Preliminary results bearing on navigation ability in these species are presented. Both species operate in difficult environments, and the problems faced in the design of electronic instrumentation for these studies are not completely specified at this time. However, the critical factors yet to be understood are primarily related to the behavior of instrumented animals. The data obtained with these experimental techniques are included, first to illustrate the technique and, second to provide initial preliminary results bearing on animal navigation.

  7. 75 FR 18794 - Certain Orange Juice From Brazil: Preliminary Results of Antidumping Duty Administrative Review...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-13

    .... Comercio, Industria, and Agricultura (Fischer) and Sucocitrico Cutrale, S.A. (Cutrale). In Cutrale's.... Comercio, Industria, e Agricultura for the Preliminary Results in the 08-09 Antidumping Duty Administrative... Results--Fischer S.A. Comercio, Industria and Agricultura.'' 2. Test of Comparison Market Sales Prices On...

  8. Comment on ``p-shell nuclei in a (0+2)ħω model space. I. Method'' and on ``p-shell nuclei in a (0+2)ħω model space. II. Results''

    NASA Astrophysics Data System (ADS)

    Millener, D. J.; Hayes, A. C.; Strottman, D.

    1992-01-01

    We point out that the shell-model calculations of Wolters, van Hees, and Glaudemans for the p-shell nuclei in a (0+2)ħω basis has several serious consistency problems, and we use the case of 16O to illustrate these problems. We discuss some limitations of the parametrization used for effective interaction, criticize the choice of experimental data used in the least-squares fit, and demonstrate that the resultant interaction exhibits some peculiar features which make it differ considerably from realistic interactions.

  9. Supermassive black holes with high accretion rates in active galactic nuclei. I. First results from a new reverberation mapping campaign

    SciTech Connect

    Du, Pu; Hu, Chen; Qiu, Jie; Li, Yan-Rong; Wang, Jian-Min; Lu, Kai-Xing; Wang, Fang; Bai, Jin-Ming; Kaspi, Shai; Netzer, Hagai; Collaboration: SEAMBH collaboration

    2014-02-10

    We report first results from a large project to measure black hole (BH) mass in high accretion rate active galactic nuclei (AGNs). Such objects may be different from other AGNs in being powered by slim accretion disks and showing saturated accretion luminosities, but both are not yet fully understood. The results are part of a large reverberation mapping (RM) campaign using the 2.4 m Shangri-La telescope at the Yunnan Observatory in China. The goals are to investigate the gas distribution near the BH and the properties of the central accretion disks, to measure BH mass and Eddington ratios, and to test the feasibility of using such objects as a new type of cosmological candles. The paper presents results for three objects, Mrk 335, Mrk 142, and IRAS F12397+3333, with Hβ time lags relative to the 5100 Å continuum of 10.6{sub −2.9}{sup +1.7}, 6.4{sub −2.2}{sup +0.8} and 11.4{sub −1.9}{sup +2.9} days, respectively. The corresponding BH masses are (8.3{sub −3.2}{sup +2.6})×10{sup 6} M{sub ⊙}, (3.4{sub −1.2}{sup +0.5})×10{sup 6} M{sub ⊙}, and (7.5{sub −4.1}{sup +4.3})×10{sup 6} M{sub ⊙}, and the lower limits on the Eddington ratios are 0.6, 2.3, and 4.6 for the minimal radiative efficiency of 0.038. Mrk 142 and IRAS F12397+333 (extinction corrected) clearly deviate from the currently known relation between Hβ lag and continuum luminosity. The three Eddington ratios are beyond the values expected in thin accretion disks and two of them are the largest measured so far among objects with RM-based BH masses. We briefly discuss implications for slim disks, BH growth, and cosmology.

  10. Cognitive Task Analysis of Business Jet Pilots' Weather Flying Behaviors: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Latorella, Kara; Pliske, Rebecca; Hutton, Robert; Chrenka, Jason

    2001-01-01

    This report presents preliminary findings from a cognitive task analysis (CTA) of business aviation piloting. Results describe challenging weather-related aviation decisions and the information and cues used to support these decisions. Further, these results demonstrate the role of expertise in business aviation decision-making in weather flying, and how weather information is acquired and assessed for reliability. The challenging weather scenarios and novice errors identified in the results provide the basis for experimental scenarios and dependent measures to be used in future flight simulation evaluations of candidate aviation weather information systems. Finally, we analyzed these preliminary results to recommend design and training interventions to improve business aviation decision-making with weather information. The primary objective of this report is to present these preliminary findings and to document the extended CTA methodology used to elicit and represent expert business aviator decision-making with weather information. These preliminary findings will be augmented with results from additional subjects using this methodology. A summary of the complete results, absent the detailed treatment of methodology provided in this report, will be documented in a separate publication.

  11. Deformed shell model results for neutrinoless positron double beta decay of nuclei in the A = 60-90 region

    NASA Astrophysics Data System (ADS)

    Sahu, R.; Srivastava, P. C.; Kota, V. K. B.

    2013-09-01

    Nuclear transition matrix elements (NTME) for neutrinoless positron double beta decay (0νβ+β+ and 0νβ+EC) of 64Zn, 74Se, 78Kr and 84Sr nuclei, which are in the A = 60-90 region, are calculated within the framework of the deformed shell model (DSM) based on Hartree-Fock states. For 64Zn, GXPF1A interaction in 1f7/2, 2p3/2, 1f5/2 and 2p1/2 space with 40Ca as the core is employed. Similarly for 74Se, 78Kr and 84Sr nuclei, 56Ni is taken as the inert core employing a modified Kuo interaction in 2p3/2, 1f5/2, 2p1/2 and 1g9/2 space. After ensuring that the DSM gives a good description of the spectroscopic properties of low-lying levels in the four nuclei considered, the NTME are calculated. The half-lives deduced with these NTME, assuming the neutrino mass is 1 eV, are smallest for 78Kr with the half-life for β+EC decay being ˜1027 yr. For all others, the half-lives are in the range of ˜1028-1029 yr.

  12. Preliminary results of the scientific experiments on the Kosmos-936 biosatellite

    NASA Technical Reports Server (NTRS)

    1977-01-01

    The scientific equipment and experiments on the Kosmos-936 biosatellite are described, including various ground controls and the lab unit for studies at the descent vehicle landing site. Preliminary results are presented of the physiological experiment with rats, biological experiments with drosophila and higher and lower plants, and radiation physics and radiobiology studies for the planning of biological protection on future space flights. The most significant conclusion from the preliminary data is that rats tolerate space flight better with an artificial force of gravity.

  13. Trade-off results and preliminary designs of Near-Term Hybrid Vehicles

    NASA Technical Reports Server (NTRS)

    Sandberg, J. J.

    1980-01-01

    Phase I of the Near-Term Hybrid Vehicle Program involved the development of preliminary designs of electric/heat engine hybrid passenger vehicles. The preliminary designs were developed on the basis of mission analysis, performance specification, and design trade-off studies conducted independently by four contractors. THe resulting designs involve parallel hybrid (heat engine/electric) propulsion systems with significant variation in component selection, power train layout, and control strategy. Each of the four designs is projected by its developer as having the potential to substitute electrical energy for 40% to 70% of the petroleum fuel consumed annually by its conventional counterpart.

  14. Simulated changes in ground-water levels resulting from proposed phosphate mining, west-central Florida; preliminary results

    USGS Publications Warehouse

    Wilson, William Edward

    1977-01-01

    A digital model of two-dimensional ground-water flow was used to simulate projected changes in the Floridan aquifer potentiometric surface in 1985 and 2000, resulting from proposed ground-water developments by the phosphate mining industry in west-central Florida. The .model was calibrated under steady-state conditions to simulate the September 1975 potentiometric surface. Under one development plan, existing phosphate mines in Polk County would continue to withdraw ground water at 1975 rates, until phased out as the ore is depleted; no new mines would be introduced. Preliminary results indicate that under this plan, maximum simulated recovery of the potentiometric surface is 11.9 feet by 1985 and 36.5 feet by 2000. Under an alternative plan, all proposed mines in Polk, Hardee, DeSoto, Hillsborough and Manatee Counties would begin operations: in addition to the continuation and phasing out of existing mines. Preliminary results indicate that the potentiometric surface would generally recover in Polk County and decline elsewhere in the modeled area. Maximum simulated recovery is 4.5 feet by 1985 and 29.6 feet by 2000; maximum simulated drawdown is 15.1 feet by 1985 and feet by 2000. All results are preliminary and subject to revision as the investigation continues.

  15. Longitudinal Twin Study of Early Reading Development in Three Countries: Preliminary Results.

    ERIC Educational Resources Information Center

    Byrne, Brian; Delaland, Cara; Fielding-Barnsley, Ruth; Quain, Peter; Samuelsson, Stefan; Hoien, Torleiv; Corley, Robin; DeFries, John C.; Wadsworth, Sally; Willcutt, Erik; Olson, Richard K.

    2002-01-01

    Preliminary results from data on 146 Australian, 284 American, and 70 Norwegian preschool twins indicate reliable genetic influences on phonological awareness and memory and learning. Vocabulary, grammar, and morphology showed significant shared environment and negligible genetic effects. A print knowledge composite showed genetic and shared…

  16. 78 FR 4383 - Stainless Steel Bar From Brazil: Preliminary Results of Antidumping Duty Administrative Review...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-22

    ... International Trade Administration Stainless Steel Bar From Brazil: Preliminary Results of Antidumping Duty... the antidumping duty order on stainless steel bar (SSB) from Brazil. The period of review (POR) is... Antidumping Duty Administrative Review: Stainless Steel Bar from Brazil'' dated concurrently with this...

  17. 78 FR 34644 - Stainless Steel Plate in Coils From Belgium: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-10

    ... International Trade Administration Stainless Steel Plate in Coils From Belgium: Preliminary Results of... administrative review of the antidumping duty order on stainless steel plate in coils (steel plate) from Belgium...: Scope of the Order The product covered by this order is certain stainless steel plate in...

  18. 75 FR 67689 - Stainless Steel Bar From Brazil: Preliminary Results of Antidumping Duty Administrative Review

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-11-03

    ... International Trade Administration Stainless Steel Bar From Brazil: Preliminary Results of Antidumping Duty... antidumping duty order on certain stainless steel bar from Brazil. The review covers one producer/ exporter of... Department published in the Federal Register an antidumping duty order on certain stainless steel bar...

  19. Changes in Self-Esteem as a Result of an Individualized Curriculum. Preliminary Report.

    ERIC Educational Resources Information Center

    Powell, Marvin M.

    Preliminary results give strong indication that six months with an individualized instruction curriculum (Westinghouse Learning Corporation's PLAN) greatly increase self-esteem among elementary-school children. Children from a working class, ethnically mixed school, whose self-esteem was lower in October than children from control schools (The…

  20. 69 FR 76450 - Honey from Argentina: Preliminary Results of Countervailing Duty Administrative Review

    Federal Register 2010, 2011, 2012, 2013, 2014

    2004-12-21

    ... International Trade Administration C-357-813 Honey from Argentina: Preliminary Results of Countervailing Duty... countervailing duty order on honey from Argentina for the period January 1, 2003, through December 31, 2003. If... countervailing duty order on honey from Argentina. See Notice of Countervailing Duty Order: Honey From...

  1. 68 FR 69660 - Honey From Argentina: Preliminary Results of Countervailing Duty Administrative Review

    Federal Register 2010, 2011, 2012, 2013, 2014

    2003-12-15

    ... International Trade Administration Honey From Argentina: Preliminary Results of Countervailing Duty... countervailing duty order on honey from Argentina for the period January 1, 2001 through December 31, 2002. If... Department published in the Federal Register the countervailing duty order on honey from Argentina....

  2. 69 FR 621 - Honey From Argentina: Preliminary Results of Antidumping Duty Administrative Review

    Federal Register 2010, 2011, 2012, 2013, 2014

    2004-01-06

    ... International Trade Administration Honey From Argentina: Preliminary Results of Antidumping Duty Administrative... announcing the initiation of the administrative review of the antidumping duty order on honey from Argentina... sales of honey from Argentina have been made below the normal value (NV) in the cases of Nexco S.A....

  3. Preliminary Results of Autotuning GEMM Kernels for the NVIDIA Kepler Architecture- GeForce GTX 680

    SciTech Connect

    Kurzak, Jakub; Luszczek, Pitor; Tomov, Stanimire; Dongarra, Jack

    2012-04-01

    Kepler is the newest GPU architecture from NVIDIA, and the GTX 680 is the first commercially available graphics card based on that architecture. Matrix multiplication is a canonical computational kernel, and often the main target of initial optimization efforts for a new chip. This article presents preliminary results of automatically tuning matrix multiplication kernels for the Kepler architecture using the GTX 680 card.

  4. 78 FR 34338 - Citric Acid and Certain Citrate Salts From Canada: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-07

    ... International Trade Administration Citric Acid and Certain Citrate Salts From Canada: Preliminary Results of... administrative review of the antidumping duty order on citric acid and certain citrate salts (citric acid) from... is citric acid and certain citrate salts. The product is currently classified in the Harmonized...

  5. 76 FR 5782 - Citric Acid and Certain Citrate Salts From Canada: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-02

    ... International Trade Administration Citric Acid and Certain Citrate Salts From Canada: Preliminary Results of... administrative review of the antidumping duty order on citric acid and certain citrate salts (citric acid) from... citric acid from Canada with respect to JBL Canada covering the period November 20, 2008, through May 19...

  6. 78 FR 34648 - Citric Acid and Certain Citrate Salts: Preliminary Results of Countervailing Duty Administrative...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-10

    ... International Trade Administration Citric Acid and Certain Citrate Salts: Preliminary Results of Countervailing... review of the countervailing duty (CVD) order on citric acid and citrate salts from the People's Republic... (202) 482-1503. Scope of the Order The merchandise subject to the order is citric acid and certain...

  7. 76 FR 78237 - 1-Hydroxyethylidene-1, 1-Diphosphonic Acid From India: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-16

    ... International Trade Administration 1-Hydroxyethylidene-1, 1-Diphosphonic Acid From India: Preliminary Results of... administrative review of the antidumping duty order on 1-hydroxyethylidene-1, 1-diphosphonic acid (HEDP) from...- hydroxyethylidene-1, 1-diphosphonic acid \\1\\, also referred to as hydroxethlylidenediphosphonic acid...

  8. 77 FR 6061 - Citric Acid and Certain Citrate Salts From Canada: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-07

    ... International Trade Administration Citric Acid and Certain Citrate Salts From Canada: Preliminary Results of... administrative review of the antidumping duty order on citric acid and certain citrate salts (citric acid) from... initiation of an administrative review of the antidumping duty order on citric acid from Canada with respect...

  9. 76 FR 12033 - Certain Frozen Warmwater Shrimp From Thailand: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-04

    ... individual examination are Marine Gold Products Co., Ltd. (MRG) and Pakfood Public Company Limited and its... investigation, the Department found that The Union Frozen Products Co., Ltd. and Bright Sea Co., Ltd. comprised... Products, Co., Ltd. as a single entity for purposes of the preliminary results. In the Initiation...

  10. 78 FR 17637 - Polyester Staple Fiber From Taiwan: Preliminary Results of Antidumping Duty Administrative Review...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-22

    ... International Trade Administration Polyester Staple Fiber From Taiwan: Preliminary Results of Antidumping Duty... the antidumping duty order on polyester staple fiber (PSF) from Taiwan. The period of review (POR) is... Antidumping Duty Administrative Review: Polyester Staple Fiber from Taiwan'' dated concurrently with...

  11. 75 FR 5964 - Certain Polyester Staple Fiber From Taiwan: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-05

    ... International Trade Administration Certain Polyester Staple Fiber From Taiwan: Preliminary Results of... review of the antidumping duty order on certain polyester staple fiber (PSF) from Taiwan. The period of... fiber from one producer/exporter. We have preliminarily found that sales of the subject merchandise...

  12. 76 FR 22366 - Certain Polyester Staple Fiber From Taiwan: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-21

    ... International Trade Administration Certain Polyester Staple Fiber From Taiwan: Preliminary Results of... review of the antidumping duty order on certain polyester staple fiber (PSF) from Taiwan. The period of... 30, 2010). We have rescinded the review in part with respect to Nan Ya. See Polyester Staple...

  13. 77 FR 73422 - Seamless Refined Copper Pipe and Tube From Mexico: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-10

    ... International Trade Administration Seamless Refined Copper Pipe and Tube From Mexico: Preliminary Results of... administrative review of the antidumping duty order on seamless refined copper pipe and tube from Mexico. The... refined copper pipe and tube. The product is currently classified under the Harmonized Tariff Schedule...

  14. 78 FR 21107 - Circular Welded Carbon Steel Pipes and Tubes from Turkey: Preliminary Results of Countervailing...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-09

    ... International Trade Administration Circular Welded Carbon Steel Pipes and Tubes from Turkey: Preliminary Results... carbon steel pipes and tubes from Turkey (pipes and tubes from Turkey) for the period of review (POR) of... welded carbon steel pipe and tube with an outside diameter of 0.375 inch or more, but not over 16...

  15. 76 FR 47540 - Polyethylene Terephthalate Film, Sheet, and Strip From Taiwan: Preliminary Results of Antidumping...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-05

    ... administrative review of the antidumping duty order on polyethylene terephthalate film, sheet, and strip (PET... exporters of PET Film from Taiwan. The Department preliminarily determines that Shinkong and Nan Ya made sales of PET Film below normal value (NV) during the POR. The preliminary results are listed below in...

  16. Sediment Export from Forest Road Turn-outs: A Study Design and Preliminary Results

    Treesearch

    Johnny M. Grace

    1998-01-01

    This paper reports the design and preliminary results of a study that evaluates the effects of commonly prescribed forest road runoff control treatments. A study design which utilizes runoff samplers, runoff diversion walls, sediment filter bags, and erosion stakes to evaluate sediment transport through runoff control treatments is documented. The study design will...

  17. 75 FR 977 - Carbazole Violet Pigment 23 From India: Preliminary Results of Countervailing Duty Administrative...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-07

    ... International Trade Administration Carbazole Violet Pigment 23 From India: Preliminary Results of Countervailing... pigment 23 (CVP-23) from India for the period January 1, 2007, through December 31, 2007. We preliminarily... Pigment 23 from India, 69 FR 77995 (December 29, 2004) (CVP-23 Order). On December 1, 2008, the Department...

  18. 75 FR 52930 - Carbazole Violet Pigment 23 From India: Preliminary Results of Antidumping Duty Changed...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-30

    ... International Trade Administration Carbazole Violet Pigment 23 From India: Preliminary Results of Antidumping... changed-circumstances review of the antidumping duty order on carbazole violet pigment 23 from India to determine whether Meghmani Pigments (Meghmani) is the successor-in-interest to Alpanil Industries (Alpanil...

  19. Photon Detection with Cooled Avalanche Photodiodes: Theory and Preliminary Experimental Results

    NASA Technical Reports Server (NTRS)

    Robinson, D. L.; Hays, D. A.

    1985-01-01

    Avalanche photodiodes (APDs) can be operated in a geiger-tube mode so that they can respond to single electron events and thus be used as photon counting detectors. Operational characteristics and theory of APDs while used in this mode are analyzed and assessed. Preliminary experimental investigation of several commercially available APDs has commenced, and initial results for dark count statistics are presented.

  20. 78 FR 62584 - Certain Lined Paper Products From India: Preliminary Results of Countervailing Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-22

    ... International Trade Administration Certain Lined Paper Products From India: Preliminary Results of... administrative review of the countervailing duty (CVD) order on certain lined paper products from India. The...., Washington, DC 20230; telephone (202) 482-1503. Scope of the Order The merchandise subject to the Lined Paper...

  1. 77 FR 61742 - Certain Lined Paper Products From India: Preliminary Results of Countervailing Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-11

    ... International Trade Administration Certain Lined Paper Products From India: Preliminary Results of... administrative review of the countervailing duty order on certain lined paper products from India. The period of... subject to the order is certain lined paper products. The products are currently classifiable under the...

  2. Chemical Analysis of the Moon at the Surveyor VII Landing Site: Preliminary Results.

    PubMed

    Turkevich, A L; Franzgrote, E J; Patterson, J H

    1968-10-04

    The alpha-scattering experiment aboard Surveyor VII has provided a chemical analysis of the moon in the area of the crater Tycho. The preliminary results indicate a chemical composition similar to that already found at two mare sites, but with a lower concentration of elements of the iron group (titanium through copper).

  3. Chemical Analysis of the Moon at the Surveyor VI Landing Site: Preliminary Results.

    PubMed

    Turkevich, A L; Patterson, J H; Franzgrote, E J

    1968-06-07

    The alpha-scattering experiment aboard soft-landing Surveyor VI has provided a chemical analysis of the surface of the moon in Sinus Medii. The preliminary results indicate that, within experimental errors, the composition is the same as that found by Surveyor V in Mare Tranquillitatis. This finding suggests that large portions of the lunar maria resemble basalt in composition.

  4. 78 FR 34649 - Aluminum Extrusions From the People's Republic of China: Preliminary Results of Countervailing...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-10

    ... International Trade Administration Aluminum Extrusions From the People's Republic of China: Preliminary Results...) is conducting an administrative review of the countervailing duty (CVD) order on aluminum extrusions... Aluminum Co., Ltd. (Alnan Aluminum), Alnan Aluminum Foil Co., Ltd. (Alnan Foil), Alnan (Shanglin) Industry...

  5. 78 FR 34986 - Aluminum Extrusions From the People's Republic of China: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-11

    ... International Trade Administration Aluminum Extrusions From the People's Republic of China: Preliminary Results... (``the Department'') is conducting an administrative review of the antidumping duty order on aluminum... respondents: Kromet International, Inc. (``Kromet''); and a single entity comprised of Guang Ya Aluminum...

  6. 78 FR 1834 - Magnesium Metal From the People's Republic of China: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-09

    ... International Trade Administration Magnesium Metal From the People's Republic of China: Preliminary Results of... administrative review of the antidumping duty order on magnesium metal from the People's Republic of China (``PRC... the Order The product covered by this antidumping duty order is magnesium metal from the PRC, which...

  7. 43 CFR 11.43 - Can interested parties review the results of the preliminary application?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 1 2011-10-01 2011-10-01 false Can interested parties review the results of the preliminary application? 11.43 Section 11.43 Public Lands: Interior Office of the Secretary of the Interior NATURAL RESOURCE DAMAGE ASSESSMENTS Type A Procedures § 11.43 Can interested...

  8. 78 FR 9674 - Ball Bearings and Parts Thereof From Germany: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-11

    ... International Trade Administration Ball Bearings and Parts Thereof From Germany: Preliminary Results of...) is conducting an administrative review of the antidumping duty order on ball bearings and parts..., 2011, the Department revoked the order on ball bearings and parts thereof from Germany as the...

  9. Radiation Testing on State-of-the-Art CMOS: Challenges, Plans, and Preliminary Results

    NASA Technical Reports Server (NTRS)

    LaBel, Kenneth A.; Cohn, Lewis M.

    2009-01-01

    At GOMAC 2007 and 2008, we discussed a variety of challenges for radiation testing of modern semiconductor devices and technologies [1, 2]. In this presentation, we provide more specific details in this on-going investigation focusing on out-of-the-box lessons observed for providing radiation effects assurances as well as preliminary test results.

  10. 75 FR 18806 - Certain Pasta From Italy: Preliminary Results of the 13th (2008) Countervailing Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-13

    ... International Trade Administration Certain Pasta From Italy: Preliminary Results of the 13th (2008... review of the countervailing duty order on certain pasta from Italy for the period January 1, 2008... countervailing duty order on certain pasta (``pasta'' or ``subject merchandise'') from Italy. See Notice of...

  11. 76 FR 76126 - Uncovered Innerspring Units from the People's Republic of China: Preliminary Results and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-06

    ... Results and Preliminary Rescission, in Part, of the Antidumping Duty Administrative Review AGENCY: Import..., Requests for Revocation in Part, and Deferral of Administrative Review, 76 FR 17825 (March 31, 2011). On... description of the scope of the order is dispositive. Intent To Rescind, in Part, of Administrative Review...

  12. Photon Detection with Cooled Avalanche Photodiodes: Theory and Preliminary Experimental Results

    NASA Technical Reports Server (NTRS)

    Robinson, D. L.; Hays, D. A.

    1985-01-01

    Avalanche photodiodes (APDs) can be operated in a geiger-tube mode so that they can respond to single electron events and thus be used as photon counting detectors. Operational characteristics and theory of APDs while used in this mode are analyzed and assessed. Preliminary experimental investigation of several commercially available APDs has commenced, and initial results for dark count statistics are presented.

  13. 75 FR 25207 - Polyethylene Retail Carrier Bags From Malaysia: Extension of Time Limit for Preliminary Results...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-07

    ... International Trade Administration A-557-813 Polyethylene Retail Carrier Bags From Malaysia: Extension of Time.... ] Extension of Time Limit for Preliminary Results Section 751(a)(3)(A) of the Tariff Act of 1930, as amended... practicable to complete the review within these time periods, section 751(a)(3)(A) of the Act allows the...

  14. 75 FR 14422 - Purified Carboxymethylcellulose from Mexico: Extension of Time Limits for Preliminary Results of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-25

    ... International Trade Administration Purified Carboxymethylcellulose from Mexico: Extension of Time Limits for... Time Limits for Preliminary Results Section 751(a)(3)(A) of the Tariff Act of 1930, as amended (the.... However, if it is not practicable to complete the review within this time period, section 751(a)(3)(A) of...

  15. The Career Intern Program: Preliminary Results of an Experiment in Career Education. Technical Appendix. Volume 2.

    ERIC Educational Resources Information Center

    Opportunities Industrialization Centers of America, Inc., Philadelphia, PA.

    The technical appendix to "The Career Intern Program: Preliminary Results of an Experiment in Career Education," Volume 1, reports on the research designs used for evaluating the Career Intern Program's (CIP) effectiveness in increasing the student's cognitive skills, academic achievement, vocational adjustment, future orientation, and…

  16. 75 FR 44229 - Certain Frozen Warmwater Shrimp from India: Preliminary Results of Antidumping Duty Changed...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-28

    ... International Trade Administration (A-533-840) Certain Frozen Warmwater Shrimp from India: Preliminary Results... warmwater shrimp (shrimp) from India pursuant to section 751(b) of the Tariff Act of 1930, as amended (the... Frozen Warmwater Shrimp From India: Initiation of Antidumping Duty Changed Circumstances Review, 75 FR...

  17. 75 FR 37757 - Frozen Warmwater Shrimp From Vietnam: Initiation and Preliminary Results of Changed-Circumstances...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-30

    ... International Trade Administration Frozen Warmwater Shrimp From Vietnam: Initiation and Preliminary Results of...-circumstances review of the antidumping duty order on frozen warmwater shrimp from the Socialist Republic of... accorded to Phuong Nam Co., Ltd., with regard to the antidumping duty order on frozen warmwater shrimp from...

  18. Longitudinal Twin Study of Early Reading Development in Three Countries: Preliminary Results.

    ERIC Educational Resources Information Center

    Byrne, Brian; Delaland, Cara; Fielding-Barnsley, Ruth; Quain, Peter; Samuelsson, Stefan; Hoien, Torleiv; Corley, Robin; DeFries, John C.; Wadsworth, Sally; Willcutt, Erik; Olson, Richard K.

    2002-01-01

    Preliminary results from data on 146 Australian, 284 American, and 70 Norwegian preschool twins indicate reliable genetic influences on phonological awareness and memory and learning. Vocabulary, grammar, and morphology showed significant shared environment and negligible genetic effects. A print knowledge composite showed genetic and shared…

  19. Developing Parenting Skills through Health Visitors: Preliminary Results from an Evaluation Study.

    ERIC Educational Resources Information Center

    Stevenson, Jim

    Preliminary results of a study of the extent to which training health visitors in behavior modification techniques improves the effectiveness of their work with families of young children are presented. A total of 14 health visitors were recruited and assigned to training and delay-of-training groups. Selected from case loads, participating…

  20. 76 FR 35405 - Solid Urea From the Russian Federation: Preliminary Results of Antidumping Duty Administrative...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-17

    ... International Trade Administration Solid Urea From the Russian Federation: Preliminary Results of Antidumping... review of the antidumping duty order on solid urea from the Russian Federation (Russia). The review... solid urea from the Union of Soviet Socialist Republics (Soviet Union). See Antidumping Duty Order; Urea...

  1. A Qualitative Study of Factors Influencing Racial Diversity in Environmental Education: Preliminary Results

    Treesearch

    Kathy James; Leo H. McAvoy

    1992-01-01

    This study presents preliminary result interviews with people of color working in environmental education and interpretation throughout the United States. The three primary questions asked were these? (1) What path led each individual to a career in environmental education; (2) How does each individual define environmentalism? and (3) What are the primary issues this...

  2. 75 FR 8925 - Pressure Sensitive Plastic Tape from Italy: Preliminary Results of Antidumping Duty Changed...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-26

    ... International Trade Administration Pressure Sensitive Plastic Tape from Italy: Preliminary Results of... pressure sensitive plastic tape from Italy pursuant to section 751(b) of the Tariff Act of 1930, as amended... review request. See Pressure Sensitive Plastic Tape from Italy: Notice of Initiation of Antidumping...

  3. 76 FR 62343 - Certain Lined Paper Products From India: Notice of Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-07

    ... International Trade Administration Certain Lined Paper Products From India: Notice of Preliminary Results of... review of the antidumping duty order on certain lined paper products (CLPP) from India. For the period...). Pursuant to a request from the Association of American School Paper Suppliers, (AASPS or petitioner),...

  4. 78 FR 78335 - Lightweight Thermal Paper from Germany: Preliminary Results of Antidumping Duty Administrative...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-26

    ... International Trade Administration Lightweight Thermal Paper from Germany: Preliminary Results of Antidumping... thermal paper (LWTP) from Germany. The period of review (POR) is November 1, 2011, through October 31... order is lightweight thermal paper. The merchandise subject to the order is currently classified...

  5. 76 FR 54202 - Honey From Argentina: Preliminary Results of Antidumping Duty New Shipper Review

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-31

    ... International Trade Administration Honey From Argentina: Preliminary Results of Antidumping Duty New Shipper... antidumping duty order on honey from Argentina in response to a request from Villamora S.A. (Villamora), an... Department published the antidumping duty order on honey from Argentina on December 10, 2001. See Notice...

  6. 76 FR 2655 - Honey From Argentina: Preliminary Results of Antidumping Duty Administrative Review

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-14

    ... International Trade Administration Honey From Argentina: Preliminary Results of Antidumping Duty Administrative... conducting an administrative review of the antidumping duty order on honey from Argentina. The review covers... determine that sales of honey from Argentina have not been made below normal value (NV) by TransHoney...

  7. 76 FR 19315 - Certain Orange Juice From Brazil: Preliminary Results of Antidumping Duty Administrative Review...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-07

    ... Agricultura (Fischer) and Sucocitrico Cutrale, S.A. (Cutrale). In Cutrale's request for an administrative... ``Calculations Performed for Fischer S.A. Comercio, Industria, and Agricultura for the Preliminary Results in the..., Industria and Agricultura.'' 2. Test of Comparison Market Sales Prices On a product-specific basis, we...

  8. 75 FR 77831 - Lightweight Thermal Paper From Germany: Notice of Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-14

    ... International Trade Administration Lightweight Thermal Paper From Germany: Notice of Preliminary Results of... administrative review of the antidumping duty order on lightweight thermal paper from Germany. For the period.... Accordingly, the Department rescinded the administrative review with respect to Mitsubishi. See Lightweight...

  9. 77 FR 73980 - Fresh Garlic From the People's Republic of China: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-12

    ... International Trade Administration Fresh Garlic From the People's Republic of China: Preliminary Results of... administrative review (AR) of the antidumping duty order on fresh garlic from the People's Republic of China (PRC... withdrawn. See Fresh Garlic From the People's Republic of China: Partial Rescission of the...

  10. 77 FR 66580 - Certain Preserved Mushrooms From India: Preliminary Results of Antidumping Duty Administrative...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-06

    ... International Trade Administration Certain Preserved Mushrooms From India: Preliminary Results of Antidumping... review of the antidumping duty order on certain preserved mushrooms (mushrooms) from India. The period of... merchandise subject to the order is certain preserved mushrooms. The product is currently classified under...

  11. 78 FR 13321 - Silicon Metal From the People's Republic of China: Preliminary Results of Antidumping Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-27

    ... International Trade Administration Silicon Metal From the People's Republic of China: Preliminary Results of... metal from the People's Republic of China (``PRC'') for the period of review (``POR'') June 1, 2011... metal from the PRC.\\2\\ On June 29, 2012, Globe Metallurgical Inc. (``Petitioner'') requested a review...

  12. Lynx home range and movements in Montana and Wyoming: Preliminary results [Chapter 11

    Treesearch

    John R. Squires; Tom Laurion

    2000-01-01

    Preliminary telemetry data suggest that lynx in Montana and Wyoming have large home ranges; this result supports the Koehler and Aubry (1994) contention that lynx from southern lynx populations have large spatial-use areas. Annual home ranges of males were larger than females. Straight-line, daily travel distance averaged 2 to 4 km, which is similar to northern...

  13. 43 CFR 11.43 - Can interested parties review the results of the preliminary application?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false Can interested parties review the results of the preliminary application? 11.43 Section 11.43 Public Lands: Interior Office of the Secretary of the Interior NATURAL RESOURCE DAMAGE ASSESSMENTS Type A Procedures § 11.43 Can interested...

  14. 78 FR 20615 - Drill Pipe From the People's Republic of China: Preliminary Results of Countervailing Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-05

    ... International Trade Administration Drill Pipe From the People's Republic of China: Preliminary Results of... review of the countervailing duty (CVD) order on drill pipe from the People's Republic of China (PRC...-4793. Scope of the Order The scope of the order consists of steel drill pipe and steel drill...

  15. 77 FR 13547 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Preliminary Results of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-07

    ... Antidumping Duty Administrative Review: Petroleum Wax Candles from the People's Republic of China, 72 FR 52355...: Preliminary Results of Administrative Review AGENCY: Import Administration, International Trade Administration... administrative review of the antidumping duty order on certain frozen warmwater shrimp (``shrimp'') from...

  16. Preliminary results of the round-robin testing of F82H

    SciTech Connect

    Shiba, K.; Yamanouchi, N.; Tohyama, A.

    1996-10-01

    Preliminary results of metallurgical, physical and mechanical properties of low activation ferritic steel F82H (IEA heat) were obtained in the round-robin test in Japan. The properties of IEA heat F82H were almost the same as the original F82H.

  17. Preliminary results and worst-case analysis of in patient scoliosis rehabilitation.

    PubMed

    Weiss, H R; Lohschmidt, K; el-Obeidi, N; Verres, C

    1997-01-01

    The purpose of this study was to assess the effectiveness of a scoliosis-specific rehabilitation programme as it is carried out in the Katharina Schroth Spinal Deformities Rehabilitation Center. Physiotherapy in the treatment of scoliosis patients is still regarded as ineffective since the study by the American Orthopedic Association in 1941, which showed that general exercises could not influence the natural history of scoliosis. However, specific exercise programmes were not known in the USA at that time. This preliminary study started in 1989 with the following inclusion criteria: (1) diagnosis of idiopathic scoliosis; (2) risser sign < 4; (3) no treatment other than physiotherapy; (4) first control after 1-3 years during repeated in patient treatment; (5) standing AP radiograph taken not more than 6 months before the first in patient treatment. A total of 181 scoliosis patients, with an average age of 12.7 years and an average angle of curvature of 27% according to Cobb, were included in this study. The average risser sign was 1.4, the average follow-up 33 months. The Cobb angle of the major curve was measured in a standardized way. The results of our preliminary study were compared to natural history as known from literature. For the worst-case analysis additionally a questionnaire was sent to the non-repeaters treated at our centre at the same time (1989 and 1990) as the patient sample described above, taking into account the same inclusion criteria for this patient sample except point 4. Results showed that progression as usually defined (increase in curvature of 5 degrees or more per year) has not been found in the preliminary study. The patient sample of this study was divided into different age groups and different groups of curve magnitude, for comparison with other studies. Additional to the patient sample of the preliminary study, 116 of the patients from the years 1989 and 1990 fulfilled the inclusion criteria of the preliminary study with the

  18. Preliminary results from the portable standard satellite laser ranging intercomparison with MOBLAS-7

    NASA Technical Reports Server (NTRS)

    Selden, Michael; Varghese, Thomas K.; Heinick, Michael; Oldham, Thomas

    1993-01-01

    Conventional Satellite Laser Ranging (SLR) instrumentation has been configured and successfully used to provide high-accuracy laboratory measurements on the LAGEOS-2 and TOPEX cube-corner arrays. The instrumentation, referred to as the Portable Standard, has also been used for field measurements of satellite ranges in tandem with MOBLAS-7. Preliminary results of the SLR measurements suggest that improved range accuracy can be achieved using this system. Results are discussed.

  19. X-Band local area weather radar--preliminary calibration results.

    PubMed

    Jensen, N E

    2002-01-01

    DHI has developed a cost-effective X-Band Local Area Weather Radar (LAWR) with a typical range (radius) of 60 km, 500 x 500 m areal resolution and 253 reflection levels. The development is performed in a co-operation with a number of European partners, including Danish Meteorological Institute. The specifications of the weather radar and preliminary results from the calibration are presented. Good calibration results have been obtained using high-resolution rain gauges.

  20. Barkhausen Effect and Acoustic Emission in a Metallic Glass - Preliminary Results

    SciTech Connect

    Lopez Sanchez, R.; Piotrkowski, R.; Ruzzante, J.E.

    2004-02-26

    Magneto Acoustic Emission, which is Barkhausen Noise (BN) and Acoustic Emission (AE), depends on microstructure and existing residual stresses in magnetic materials. Preliminary results obtained by magnetization along two perpendicular directions on a metal glass foil are presented. Signals were analyzed with Statistic, Fast Fourier and Wavelet methods. Results are part of a Joint Research Project of the Faculty of Science, Cantabria University, Spain, and the Elastic Waves Group of the National Atomic Energy Commission, Argentina.

  1. Preliminary results from IMB3 muon/electron identification tests at KEK

    SciTech Connect

    Bratton, C.B.; Breault, J.; Conner, Z.

    1995-09-01

    A test has been conducted at KEK, Japan using beams of electrons and muons in a 1 kiloton water Cherenkov detector instrumented with IMB3 phototubes and electronics to evaluate IMB`s algorithms for identifying electrons and muons. This identification is important because the IMB3 detector`s results on the atmospheric neutrino anomaly depend on the proper identification of the electrons and muons produced in neutrino charged-current interactions. Preliminary results are presented.

  2. Developing Operation Plans from HEC Prescriptive Reservoir Model Results for the Missouri River System: Preliminary Results

    DTIC Science & Technology

    1992-03-01

    reservoir simulation model was undertaken using the same initial storages and inflows employed in the 92-year HEC-PRM application. The results of this run...by HEC-PRM results is likely to be as a point of departure for more traditional and intensive reservoir simulation studies. A major contribution of...may be desirable to create an elementary reservoir simulation package incorporating a flexible set of rule forms that could employ and display the HEC

  3. Preliminary experimental results on studying possibility of variable mass liner (VML) formation

    SciTech Connect

    1995-12-31

    The main objective of the present experiment was to study the formation process and initial stage of acceleration of a variable-mass plasma liner (VML). The method is based on magnetic acceleration of a liner with the mass reduced during such acceleration. The experiment was carried out on February 16 at VNIIEF. This report describes the results of measurements obtained in the experiment and preliminary analysis of the results characterizing operation of the test facility main units: helical EMG; 5-module disk EMG 400 mm in diameter (DEMG); ponderomotive unit (PU) with a cylindric condensed liner and a special tooth-cutoff. The first part of the report presents measurement results obtained on the VNIIEF`s diagnostic equipment that are compared with those obtained by American specialists on their diagnostic equipment. Information submitted by American specialists is included in part 2 of this report. The second part of the report presents preliminary computational-theoretic analysis of the main measured results describing operation of DEMG TL system in the experiment; experimental data are compared with theoretical ones obtained before and after the experiment. But more emphasis is placed on the data preliminary analysis indicating that in the experiment a variable mass liner is formed (VML or plasma bubble).

  4. Breast ultrasound tomography with two parallel transducer arrays: preliminary clinical results

    NASA Astrophysics Data System (ADS)

    Huang, Lianjie; Shin, Junseob; Chen, Ting; Lin, Youzuo; Intrator, Miranda; Hanson, Kenneth; Epstein, Katherine; Sandoval, Daniel; Williamson, Michael

    2015-03-01

    Ultrasound tomography has great potential to provide quantitative estimations of physical properties of breast tumors for accurate characterization of breast cancer. We design and manufacture a new synthetic-aperture breast ultrasound tomography system with two parallel transducer arrays. The distance of these two transducer arrays is adjustable for scanning breasts with different sizes. The ultrasound transducer arrays are translated vertically to scan the entire breast slice by slice and acquires ultrasound transmission and reflection data for whole-breast ultrasound imaging and tomographic reconstructions. We use the system to acquire patient data at the University of New Mexico Hospital for clinical studies. We present some preliminary imaging results of in vivo patient ultrasound data. Our preliminary clinical imaging results show promising of our breast ultrasound tomography system with two parallel transducer arrays for breast cancer imaging and characterization.

  5. Investigation of polarized-proton target materials by differential calorimetry: preliminary results

    SciTech Connect

    Hill, D.A.; Hill, J.J.

    1980-10-15

    A simple differential calorimeter was designed and operated for an investigation of the thermodynamic properties of polarized target materials. The calibration and use of the calorimeter are discussed, after a brief exposition of our motivation for this work. The results of a preliminary study of target materials is presented with emphasis on the relevance of the glass state to dynamic polarization in chemically-doped targets.

  6. PRELIMINARY RESULTS FROM A SIMULATION OF QUENCHED QCD WITH OVERL AP FERMIONS ON A LARGE LATTICE.

    SciTech Connect

    BERRUTO,F.GARRON,N.HOELBLING,D.LELLOUCH,L.REBBI,C.SHORESH,N.

    2003-07-15

    We simulate quenched QCD with the overlap Dirac operator. We work with the Wilson gauge action at {beta} = 6 on an 18{sup 3} x 64 lattice. We calculate quark propagators for a single source point and quark mass ranging from am{sub 4} = 0.03 to 0.75. We present here preliminary results based on the propagators for 60 gauge field configurations.

  7. Trace the Denmark Strait Overflow Water in an Eddy-Resolving Atlantic Simulation: Some Preliminary Results

    DTIC Science & Technology

    2013-05-01

    Trace the Denmark Strait overflow water in an eddy-resolving Atlantic simulation: some preliminary results Xiaobiao Xu ( COAPS /FSU), Alan...Wallcraft (NRL/SSC), Eric Chassignet ( COAPS /FSU) Thanks: Peter Rhines (UW) and William Schmitz May 21-23, Layered ocean modeling workshop, Ann Arbor, MI...Prediction Studies ( COAPS ),2000 Levy Avenue, Building A, Suite 292,Tallahassee,FL,32306-2741 8. PERFORMING ORGANIZATION REPORT NUMBER 9. SPONSORING

  8. Preliminary Results of the Echo-Seeding Experiment ECHO-7 at SLAC

    SciTech Connect

    Xiang, D.; Colby, E.; Ding, Y.; Dunning, M.; Frederico, J.; Gilevich, S.; Hast, C.; Jobe, K.; McCormick, D.; Nelson, J.; Raubenheimer, T.O.; Soong, K.; Stupakov, G.; Szalata, Z.; Walz, D.; Weathersby, S.; Woodley, M.; Corlett, J.; Qiang, J.; Penn, G.; Prestemon, S.; /LBL, Berkeley /LPHE, Lausanne

    2010-06-15

    ECHO-7 is a proof-of-principle echo-enabled harmonic generation FEL experiment in the Next Linear Collider Test Accelerator (NLCTA) at SLAC. The experiment aims to generate coherent radiation at 318 nm and 227 nm, which are the 5th and 7th harmonic of the infrared seed laser. In this paper we present the preliminary results from the commissioning run of the completed experimental setup which started in April 2010.

  9. The 1994 International Transatlantic Two-Way Satellite Time and Frequency Transfer Experiment: Preliminary Results

    DTIC Science & Technology

    1994-12-01

    The 1994 International Transatlantic Iho-Way Satellite Time and Frequency lkansfer Experiment: Preliminary Results J. A. DeYoung, W. J...Klepczynski, A. D. McKinley, W. Powell & F! Mai U.S. Naval Observatory, Time Service Department Washington, DC, USA F! Hetzel & A. Bauch, Physikalisch...Corporation Delft, The Netherlands Washington, DC, USA Abstract The international transatlantic time and frequency transfer experiment was designed by

  10. Nucleon resonance decay by the K0S+ channel: Preliminary results

    NASA Astrophysics Data System (ADS)

    Shende, S. V.; Castelijns, R.; Bacelar, J. C. S.; Löhner, H.; Messchendorp, J.

    2006-05-01

    The strange meson production on a proton target in the K ^0Sigma^+ channel is sensitive to nucleon resonance contributions. The K^0 production on a deuteron target can provide information on the hyperon-nucleon final-state interaction. The experiments gamma p to K ^0Sigma^+ and gamma d to K^0Sigma^+n have been carried out at the ELSA facility at Bonn. In this paper, we report the preliminary results of both experiments.

  11. Preliminary Pioneer 10 encounter results from the Ames Research Center plasma analyzer experiment

    NASA Technical Reports Server (NTRS)

    Wolfe, J. H.; Collard, H. R.; Mihalov, J. D.; Intriligator, D. S.

    1974-01-01

    Preliminary results from the Ames Research Center plasma analyzer experiment for the Pioneer 10 Jupiter encounter indicate that Jupiter has a detached bow shock and magnetopause similar to the case at Earth but much larger in spatial extent. In contrast to Earth, Jupiter's outer magnetosphere appears to be highly inflated by thermal plasma and therefore highly responsive in size to changes in solar wind dynamic pressure.

  12. Cosmogenic nuclei

    NASA Technical Reports Server (NTRS)

    Raisbeck, G. M.

    1986-01-01

    Cosmogenic nuclei, nuclides formed by nuclear interactions of galactic and solar cosmic rays with extraterrestrial or terrestrial matter are discussed. Long lived radioactive cosmogenic isotopes are focused upon. Their uses in dating, as tracers of the interactions of cosmic rays with matter, and in obtaining information on the variation of primary cosmic ray flux in the past are discussed.

  13. Pan-STARRS 1 discoveries of new Neptune Trojans: Preliminary results

    NASA Astrophysics Data System (ADS)

    Lin, Hsing-Wen; Chen, Yin Tung; Holman, Matthew J.; Ip, Wing-Huen

    2015-11-01

    Neptune Trojans are a well-known probe of the dynamical environment of the outer solar system. However, given the small number of known Neptune Trojans, many questions remain: the total number, the size distribution, and the orbital distribution of Neptune Trojans are all still unclear.Pan-STARRS 1 (PS1) survey provides a chance to comprehensively investigate the properties of Neptune Trojan population. In this study we present our preliminary results of a PS1 search for new Neptune Trojans. We report several candidates. At least one unstable L5 trojan has been confirmed. The preliminary orbital distribution of Neptune Trojan populations shows a possible L4/L5 distribution asymmetry from the combination of our new candidates and the known Neptune Trojans.

  14. Results of Ponseti Brasil Program: Multicentric Study in 1621 Feet: Preliminary Results.

    PubMed

    Nogueira, Monica P; Queiroz, Ana C D B F; Melanda, Alessandro G; Tedesco, Ana P; Brandão, Antonio L G; Beling, Claudio; Violante, Francisco H; Brandão, Gilberto F; Ferreira, Laura F A; Brambila, Leandro S; Leite, Leopoldina M; Zabeu, Jose L; Kim, Jung H; Fernandes, Kalyana E; Arima, Marcia A S; Aguilar, Maria D P Q; Farias Filho, Orlando C D; Oliveira Filho, Oscar B D A; Pinho, Solange D S; Moulin, Paulo; Volpi, Reinaldo; Fox, Mark; Greenwald, Miles F; Lyle, Brandon; Morcuende, Jose A

    The Ponseti method has been shown to be the most effective treatment for congenital clubfoot. The current challenge is to establish sustainable national clubfoot treatment programs that utilize the Ponseti method and integrate it within a nation's governmental health system. The Brazilian Ponseti Program (Programa Ponseti Brasil) has increased awareness of the utility of the Ponseti method and has trained >500 Brazilian orthopaedic surgeons in it. A group of 18 of those surgeons had been able to reproduce the Ponseti clubfoot treatment, and compiled their initial results through structured spreadsheet. The study compiled 1040 patients for a total of 1621 feet. The average follow-up time was 2.3 years with an average correction time of approximately 3 months. Patients required an average of 6.40 casts to achieve correction. This study demonstrates that good initial correction rates are reproducible after training; from 1040 patients only 1.4% required a posteromedial release. Level IV.

  15. 77 FR 53845 - Certain Steel Nails From the People's Republic of China: Preliminary Results and Partial...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-04

    ...The Department of Commerce (``Department'') is conducting the third administrative review of the antidumping duty order on certain steel nails from the People's Republic of China (``PRC'') for the period August 1, 2010, through July 31, 2011. The Department has preliminarily determined that sales have been made below normal value (``NV'') by certain respondents examined in this administrative review. If these preliminary results are adopted in our final results of this review, the Department will instruct U.S. Customs and Border Protection (``CBP'') to assess antidumping duties on all appropriate entries of subject merchandise during the period of review.

  16. Mass transport phenomena in microgravity: Preliminary results of the first MEPHISTO flight experiment

    NASA Technical Reports Server (NTRS)

    Favier, Jean Jacques; Garandet, J. P.; Rouzaud, A.; Camel, D.

    1994-01-01

    The MEPHISTO space program is the result of a cooperative effort that involves the French nuclear and space agencies (Commissariat a l'energie atomique, CEA - Centre National d'Etudes Spatiales, CNES) and the American National Aeronautics and Space Administration (NASA). The scientific studies and apparatus development were funded in the frame of the GRAMME agreement between CEA and CNES, the flight costs being taken in charge by NASA. Six flight opportunities are scheduled, with alternating French and American principal investigators. It is the purpose of this paper to briefly present MEPHISTO along with the preliminary results obtained during its first flight on USMP-1 in October 1992.

  17. Acceptability of robotic technology in neuro-rehabilitation: preliminary results on chronic stroke patients.

    PubMed

    Mazzoleni, Stefano; Turchetti, Giuseppe; Palla, Ilaria; Posteraro, Federico; Dario, Paolo

    2014-09-01

    During the last decade, different robotic devices have been developed for motor rehabilitation of stroke survivors. These devices have been shown to improve motor impairment and contribute to the understanding of mechanisms underlying motor recovery after a stroke. The assessment of the robotic technology for rehabilitation assumes great importance. The aim of this study is to present preliminary results on the assessment of the acceptability of the robotic technology for rehabilitation on a group of thirty-four chronic stroke patients. The results from questionnaires on the patients' acceptability of two different robot-assisted rehabilitation scenarios show that the robotic approach was well accepted and tolerated by the patients.

  18. Preliminary results of the large experimental wind turbine phase of the national wind energy program

    NASA Technical Reports Server (NTRS)

    Thomas, R. L.; Sholes, T.; Sholes, J. E.

    1975-01-01

    The preliminary results of two projects in the development phase of reliable wind turbines designed to supply cost-competitive electrical energy were discussed. An experimental 100 kW wind turbine design and its status are first reviewed. The results of two parallel design studies for determining the configurations and power levels for wind turbines with minimum energy costs are also discussed. These studies predict wind energy costs of 1.5 to 7 cents per kW-h for wind turbines produced in quantities of 100 to 1000 per year and located at sites having average winds of 12 to 18 mph.

  19. Accelerator Magnet Plugging By Metal Oxides: A Theoretical Investigation, Remediation, and Preliminary Results

    SciTech Connect

    William W. Rust

    2003-05-01

    The Thomas Jefferson National Accelerator Facility has experienced magnet overheating at high power. Overheating is caused by cooling water passages becoming plugged and is a direct result of the Dean Effect deposition of corrosion products suspended in the water. Salving simplified dynamic model equations of the flow in the magnet tubing bends yielded a relationship for plugging rate as a function of particle size, concentration, velocity, channel width and bend radius. Calculated deposition rates using data from a previous study are promising. Remediation has consisted of submicron filtration, magnet cleaning, and dissolved oxygen removal. Preliminary results are good: no accelerator outages have been attributed to magnet plugging since the remediation has been completed.

  20. Preliminary Experimental Results on Controlled Cardiac Computed Tomography: A Phantom Study

    PubMed Central

    Lu, Yang; Cai, Zhijun; Wang, Ge; Zhao, Jun; Bai, Er-Wei

    2010-01-01

    In this paper, we present the preliminary experimental results on controlled cardiac computed tomography (CT), which aims to reduce the motion artifacts by means of controlling the x-ray source rotation speed. An innovative cardiac phantom enables us to perform this experiment without modifying the scanner. It is the first experiment on the cardiac CT with speed controlled x-ray source. Experimental results demonstrate that the proposed method successfully separates the phantom images at different phases (improve the temporal resolution) though controlling the x-ray speed. PMID:19696470

  1. A VLA radio continuum survey of active late-type giants in binary systems - Preliminary results

    NASA Technical Reports Server (NTRS)

    Drake, S. A.; Simon, T.; Linsky, J. L.

    1985-01-01

    Preliminary results of a 6 cm continuum survey using the NRAO VLA of binary systems with 10-100 day orbital period containing an 'active' giant component are reported. The results show that strong radio continuum emission at centimeter wavelengths is a common but not universal property of this class of stars. Possible correlations between radio luminosity and other properties, such as X-ray luminosity, rotational period, and type of companion are discussed. Several binary systems which have been detected for the first time as radio sources are reported, and sensitive upper limits are presented for five other systems, including Capella.

  2. Response of lead-acid batteries to chopper-controlled discharge: Preliminary results

    NASA Technical Reports Server (NTRS)

    Cataldo, R. L.

    1978-01-01

    The preliminary results of simulated electric vehicle, chopper, speed controller discharge of a battery show energy output losses up to 25 percent compared to constant current discharges at the same average discharge current of 100 amperes. These energy losses are manifested as temperature rises during discharge, amounting to a two-fold increase for a 400-ampere pulse compared to the constant current case. Because of the potentially large energy inefficiency, the results suggest that electric vehicle battery/speed controller interaction must be carefully considered in vehicle design.

  3. Statistical (?) decay of light hot nuclei

    NASA Astrophysics Data System (ADS)

    Baiocco, G.; Bruno, M.; D'Agostino, M.; Morelli, L.

    2012-07-01

    The reaction 12C+12C at 95 MeV beam energy has been measured using the GARFIELD+RCo apparatuses at Laboratori Nazionali di Legnaro LNL - INFN, Italy, in the framework of an experimental campaign proposed by the NUCL-EX collaboration. The aim is to progress in the understanding of statistical properties of light nuclei at excitation energies above particle emission thresholds, by measuring exclusive fusion-evaporation data. A theoretical study of the system, performed with a newly developed Monte Carlo Hauser-Feshbach code, is shown, together with preliminary results of the data analysis.

  4. 75 FR 40777 - Certain Polyester Staple Fiber From the People's Republic of China: Notice of Preliminary Results...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-14

    ... Preliminary Results and Preliminary Rescission, in Part, of the Antidumping Duty Administrative Review AGENCY... Department of Commerce (``Department'') is conducting the second administrative review of the antidumping...'') for the period of review (``POR'') June 1, 2008, through May 31, 2009. The Department...

  5. Preliminary Results for Crustal Structure in Southeastern Africa from P-wave Receiver Functions

    NASA Astrophysics Data System (ADS)

    Kachingwe, M.; Nyblade, A.; Mulibo, G. D.; Mulowezi, A.; Kunkuta, E.; De Magalhães, V.; Wiens, D. A.; Wysession, M. E.; Julia, J.

    2013-12-01

    The crustal structure of southeastern Africa is investigated by modeling P-wave receiver functions using H-k stacking and joint inversion methods. P-wave receiver functions are analyzed for 29 broadband seismic stations in Zambia, Malawi and Mozambique. Estimates for the Moho depth and Poisson's ratio are determined from H-k stacking, and estimates for the shear wave velocity are determined by the joint inversion of receiver functions and surface wave dispersion. Preliminary results show that Moho depths beneath southeastern Africa range from 32 km to 51 km. Thicker crust is found in Proterozoic terrains, such as the Irumide Belt, while thinner crust is found in reworked Archean terrains, such as the Bangweulu Block. These results are consistent with previous studies and global averages for Precambrian terrains. The preliminary results also show a range of Poisson's ratios from 0.2 to 0.3. These new results for southeastern Africa are being combined with similar results from elsewhere in eastern and southern Africa to improve our understanding of African crustal structure.

  6. Abundances of cosmic ray nuclei heavier than 50 Sn

    NASA Technical Reports Server (NTRS)

    Waddington, C. J.; Fickle, R. K.; Garrard, T. L.; Stone, E. C.; Binns, W. R.; Israel, M. H.; Klarmann, J.

    1982-01-01

    Preliminary results are reported from 430 days of exposure of the heavy nuclei experiment on the HEAO-3 spacecraft. These results are confined to the heavy nuclei with Z equal to or greater than 50 and emphasize the conclusions obtained on the relative numbers of actinides and heavy stable elements in the lead-platinum region. The extreme paucity of actinides found is inconsistent with the predictions of a cosmic ray source that is highly enriched in r-process material, but quite consistent with a source whose composition is similar to that of normal solar system material. An upper limit, at the 95 percent confidence level, is placed in the ratio of nuclei with Z equal to or greater than 88/(Z in the range from 74 to 87) of 0.03.

  7. 76 FR 23978 - Certain Activated Carbon From the People's Republic of China: Preliminary Results of the Third...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-29

    ...., Final Results of Antidumping Duty Administrative Review: Petroleum Wax Candles from the People's... Results of the Third Antidumping Duty Administrative Review, and Preliminary Rescission in Part AGENCY... Department of Commerce (``Department'') is conducting the third administrative review of the antidumping...

  8. 75 FR 40788 - Folding Metal Tables and Chairs From the People's Republic of China: Preliminary Results of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-14

    ... Results of Antidumping Duty Administrative Review: Petroleum Wax Candles From the People's Republic of...: Preliminary Results of Antidumping Duty Administrative Review AGENCY: Import Administration, International...'') is conducting an administrative review of the antidumping duty order on folding metal tables...

  9. 75 FR 64259 - Certain New Pneumatic Off-the-Road Tires From the People's Republic of China: Preliminary Results...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-19

    ...., Final Results of Antidumping Duty Administrative Review: Petroleum Wax Candles From the People's...: Preliminary Results of Antidumping Duty Administrative Review AGENCY: Import Administration, International...'') is conducting an administrative review of the antidumping duty order on certain new pneumatic...

  10. Separation and/or divorce sexual assault in rural Ohio: preliminary results of an exploratory study.

    PubMed

    DeKeseredy, Walter S; Joseph, Carolyn

    2006-03-01

    A rapidly growing social scientific literature shows that many women are at great risk of being killed, beaten, or psychologically abused when they exit or try to leave their marital and/or cohabiting partners. However, less than a handful of studies have examined male-to-female sexual assaults during and after separation or divorce. Furthermore, the bulk of the limited empirical work on this problem was done in urban areas. Thus, the main objective of this article is to help fill two major research gaps by presenting the preliminary results of an ongoing exploratory study of separation and/or divorce sexual assault in rural Ohio.

  11. Validation of NDVI/LAI Empirical Model to Force a Pasture Growth Model: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Alexandre, C.; Lajoie, G.; Tillard, E.; Salgado, P.

    2016-08-01

    Estimating forage biomass is nowadays essential for a good farm management. To answer to this problem we can use mathematic models that use meteorological, soil, grass data. However, in specifics territories as Reunion Island, they are not efficient. That is why we want to force this kind of model to improve the biomass prediction. The Leaf Area Index (LAI) is one parameter used in growth models. Estimate this parameter from satellite images could a solution to predict better the forage biomass. Preliminary results show a strong relation between LAI and NDVI (Normalized Vegetation Index).

  12. Natural Gamma Emitters after a Selective Chemical Separation of a TENORM residue: Preliminary Results

    SciTech Connect

    Alves de Freitas, Antonio; Abrao, Alcidio; Godoy dos Santos, Adir Janete; Pecequilo, Brigitte Roxana Soreanu

    2008-08-07

    An analytical procedure was established in order to obtain selective fractions containing radium isotopes ({sup 228}Ra), thorium ({sup 232}Th), and rare earths from RETOTER (REsiduo de TOrio e TErras Raras), a solid residue rich in rare earth elements, thorium isotopes and small amount of natural uranium generated from the operation of a thorium pilot plant for purification and production of pure thorium nitrate at IPEN -CNEN/SP. The paper presents preliminary results of {sup 228}Ra, {sup 226}Ra, {sup 238}U, {sup 210}Pb, and {sup 40}K concentrations in the selective fractions and total residue determined by high-resolution gamma spectroscopy, considering radioactive equilibrium of the samples.

  13. Intraluminal brachytherapy in the treatment of oesophageal cancers--some preliminary results.

    PubMed

    Wee, J T; Theobald, D R; Chua, E J

    1994-03-01

    Cancer of the oesophagus is the sixth commonest cancer in males in Singapore. The majority occur in the elderly and patients are often debilitated at presentation. Treatment is often aimed at palliation only. In this article, the preliminary results of 15 patients treated solely on a high dose rate remote afterloading Gammamed brachytherapy machine with an Iridium 192 (Ir192) source are reported. The patients were given 15 Gray (Gy) in a single or two 7.5 Gray fractions. All the patients treated had some improvement of their dysphagia, and seven out of 11 (63%) evaluable patients had symptom improvement lasting at least 11 weeks.

  14. Preliminary results of the analysis of CaII K spectroheliograms

    NASA Technical Reports Server (NTRS)

    Kariyappa, R.; Pap, Judit M.; Balasubramaniam, K. S.; Kuhn, Jeff R.

    1995-01-01

    The preliminary results of the photometry of CaII K spectroheliograms are presented. From the spectrograms for 1992, plages, the magnetic network, intranetwork elements and the chromospheric background were separated using the histogram method. The intensity and area of these separated features, as well as the full disk intensity, were derived. The spatial K index was compared to the spectral CaII K index derived from line profiles. It was found that the spatial K index and intensity of plages, the network elements and the intranetwork and background regions were highly correlated with the MgII h and k c/w ratio.

  15. Preliminary Results of Indoor Radon/thoron Concentrations and Terrestrial Gamma Doses in Gejiu, Yunnan, China

    SciTech Connect

    Ishikawa, Tetsuo; Tokonami, Shinji; Kobayashi, Yosuke; Yoshinaga, Shinji; Sun Quafu; Min Xiangdong

    2008-08-07

    A preliminary survey on indoor radon/thoron and external gamma ray dose rate was conducted for houses in Gejiu city and its neighboring village in Yunnan Province, China. As a result of the radon/thoron measurements for about 50 houses, very high thoron concentrations were found in some hoses (maximum: 7,900 Bq/m{sup 3}). The mean annual dose from thoron decay products was estimated to be larger than that from radon decay products (2.9 mSv vs. 1.6 mSv). Further dosimetric and epidemiological studies are needed to investigate the possible effects of radon and thoron.

  16. Preliminary results of the analysis of CaII K spectroheliograms

    NASA Technical Reports Server (NTRS)

    Kariyappa, R.; Pap, Judit M.; Balasubramaniam, K. S.; Kuhn, Jeff R.

    1995-01-01

    The preliminary results of the photometry of CaII K spectroheliograms are presented. From the spectrograms for 1992, plages, the magnetic network, intranetwork elements and the chromospheric background were separated using the histogram method. The intensity and area of these separated features, as well as the full disk intensity, were derived. The spatial K index was compared to the spectral CaII K index derived from line profiles. It was found that the spatial K index and intensity of plages, the network elements and the intranetwork and background regions were highly correlated with the MgII h and k c/w ratio.

  17. Housing and Health in Europe: Preliminary Results of a Pan-European Study

    PubMed Central

    Bonnefoy, Xavier R.; Braubach, Matthias; Moissonnier, Brigitte; Monolbaev, Kubanychbek; Röbbel, Nathalie

    2003-01-01

    Objectives. The World Health Organization’s Regional Office for Europe has undertaken a large study to evaluate housing and health in 7 European cities. Methods. Survey tools were used to obtain information about housing and living conditions, health perception, and health status from a representative sample of the population in each city. Results. In Forli, Italy, the first city studied, preliminary findings indicate some important potential links between housing and health. Conclusions. These findings, when combined with those from the remaining European cities, will likely generate concrete recommendations for the allocation of resources to programs that can improve housing and health. PMID:12948980

  18. Shuttle Infrared Leeside Temperature Sensing (SILTS) experiment - STS-35 and STS-40 preliminary results

    NASA Technical Reports Server (NTRS)

    Throckmorton, David A.; Zoby, E. V.; Dunavant, James C.; Myrick, David L.

    1992-01-01

    Preliminary results from the STS-35 and STS-40 flight of the Shuttle Infrared Leeside Temperature Sensing (SILTS) experiment aboard the Shuttle Orbiter Columbia are presented. Infrared images are shown in false-color indicating the level and distribution of surface temperature over the vehicle's leeside fuselage during entry. Features evident in the imagery are related to their causative aerodynamic flow phenomena. Quantitative comparisons of the infrared image data with in situ temperature measurements obtained with thermocouples located at the aerodynamic surface of the thermal protection materials are presented.

  19. Shuttle Infrared Leeside Temperature Sensing (SILTS) experiment - STS-28 preliminary results

    NASA Technical Reports Server (NTRS)

    Throckmorton, David A.; Zoby, E. Vincent; Dunavant, James C.; Myrick, David L.

    1990-01-01

    Preliminary results from the STS-28 flight of the Shuttle Infrared Leeside Temperature Sensing (SILTS) experiment aboard the Shuttle Orbiter Columbia are presented. Infrared images are shown in false-color indicating the level and distribution of surface temperature on the leeside of the left wing during entry. Features evident in the imagery are related to their causative aerodynamic flow phenomena. Quantitative comparisons of the infrared image data with in situ temperature measurements obtained with thermocouples located at the aerodynamic surface of the thermal protection system materials are presented.

  20. Design and preliminary results of a fuel flexible industrial gas turbine combustor

    NASA Technical Reports Server (NTRS)

    Novick, A. S.; Troth, D. L.; Yacobucci, H. G.

    1981-01-01

    The design characteristics are presented of a fuel tolerant variable geometry staged air combustor using regenerative/convective cooling. The rich/quench/lean variable geometry combustor is designed to achieve low NO(x) emission from fuels containing fuel bound nitrogen. The physical size of the combustor was calculated for a can-annular combustion system with associated operating conditions for the Allison 570-K engine. Preliminary test results indicate that the concept has the potential to meet emission requirements at maximum continuous power operation. However, airflow sealing and improved fuel/air mixing are necessary to meet Department of Energy program goals.

  1. Preliminary results of carbon cycling in southwestern ecosystems: Implications for climate change

    SciTech Connect

    Klopatek, C.C. |; Murphy, K.L.; Klopatek, J.M.

    1995-12-31

    By determining the C pool sizes, cycling and relative sequestering rates, the authors intend to estimate the effects of a vegetation change caused by a temperature increase and available moisture decrease. A predominant source of C for the soil compartment is the plant litter and its subsequent decomposition. The resulting effect of temperature and moisture on decomposition will vary according to the biome and litter quality of that biome. Litter quality, referring to the carbon and other nutrient fractions, strongly influences the potential rate of decomposition. The preliminary findings indicate that litter quality and moisture, not temperature, are the major controlling variables in decomposition.

  2. Developing of Hardware to Detect Surfaces Images on Magnetic Materials: Preliminary Results

    NASA Astrophysics Data System (ADS)

    Hernández-Pavón, J. C.; Navarro, J.; Córdova, T.; Martínez, J. C.; Sosa, M.

    2006-09-01

    Implementation of a scanner system for magnetic surfaces images is proposed. The Magnetometer was built with a couple of coils arranged in a first order gradiometer. The magnetic sensor was connected to an electronic circuit, then a data acquisition card, which transmitted the signal to a PC. On the other hand, the sample was placed on a xy system, for realizing the records. The conversion of the magnetic signal to pixels, was carried out with an implemented routine in LabVIEW environment. Preliminary results suggest a reasonable correlation between the original shapes and the studied surfaces.

  3. Preliminary results for the helicity asymmetry E for eta photoproduction on the proton

    SciTech Connect

    B. T. Morrison, M. Dugger, B. G. Ritchie, CLAS Collaboration

    2012-04-01

    Polarization observables are an important tool for clarifying the nucleon resonance spectrum. No previous measurements for double polarization asymmetries have been published for eta photoproduction. Double polarization measurements have been made at Jefferson Lab using a polarized photon beam and protons in a polarized frozen spin target (FROST). Data were taken during the first running period of FROST using the CLAS detector with photon energies from 0.33 to 2.35 GeV. Preliminary results for the E polarization observable for eta meson photoproduction from the proton at threshold and above, along with comparisons to several theoretical predictions are presented.

  4. Adapting Evidence-based Mental Health Treatments in Community Settings: Preliminary Results from a Partnership Approach

    PubMed Central

    Southam-Gerow, Michael A.; Hourigan, Shannon E.; Allin, Robert B.

    2009-01-01

    This paper describes the application of a university-community partnership model to the problem of adapting evidence-based treatment approaches in a community mental health setting. Background on partnership research is presented, with consideration of methodological and practical issues related to this kind of research. Then, a rationale for using partnerships as a basis for conducting mental health treatment research is presented. Finally, an ongoing partnership research project concerned with the adaptation of evidence-based mental health treatments for childhood internalizing problems in community settings is presented, with preliminary results of the ongoing effort discussed. PMID:18697917

  5. Design and preliminary results of a fuel flexible industrial gas turbine combustor

    NASA Technical Reports Server (NTRS)

    Novick, A. S.; Troth, D. L.; Yacobucci, H. G.

    1981-01-01

    The design characteristics are presented of a fuel tolerant variable geometry staged air combustor using regenerative/convective cooling. The rich/quench/lean variable geometry combustor is designed to achieve low NO(x) emission from fuels containing fuel bound nitrogen. The physical size of the combustor was calculated for a can-annular combustion system with associated operating conditions for the Allison 570-K engine. Preliminary test results indicate that the concept has the potential to meet emission requirements at maximum continuous power operation. However, airflow sealing and improved fuel/air mixing are necessary to meet Department of Energy program goals.

  6. UAS Integration into the NAS: iHTL: DAA Display Evaluation Preliminary Results

    NASA Technical Reports Server (NTRS)

    Fern, Lisa; Rorie, Conrad; Shively, Jay

    2014-01-01

    The integrated human-in-the-loop (iHITL) simulation examined the effect of four different Detect-and-Avoid (DAA) display concepts on unmanned aircraft system (UAS) pilots' ability to maintain safe separation. The displays varied in the type and amount of guidance they provided to pilots. The study's background and methodology are discussed, followed by a presentation of the preliminary 'measured response' data (i.e., pilots' end-to-end response time in reacting to traffic alerts on their DAA display). Results indicate that display type had moderate to no affect on pilot measured response times.

  7. Quaternary sedimentation and active faulting along the Ecuadorian shelf: preliminary results of the ATACAMES Cruise (2012)

    NASA Astrophysics Data System (ADS)

    Michaud, F.; Proust, J. N.; Collot, J. Y.; Lebrun, J. F.; Witt, C.; Ratzov, G.; Pouderoux, H.; Martillo, C.; Hernández, M. J.; Loayza, G.; Penafiel, L.; Schenini, L.; Dano, A.; Gonzalez, M.; Barba, D.; De Min, L.; Ponce, G.; Urresta, A.; Calderon, M.

    2015-03-01

    Selected high-resolution seismic-reflection profiles and multibeam bathymetry acquired along the convergent Ecuador margin during the ATACAMES cruise on onboard the R/V L'Atalante (Jan.15-Feb.18, 2012) allow a preliminary evaluation of the neotectonic development and stratigraphic evolution of the margin based on the sismo-stratigraphic analysis of Quaternary sediment preserved on the margin shelf and upper slope. We present three major preliminary results. (1) The evolution of the Esmeraldas, Guayaquil and Santa Elena canyons. The head of the Esmeraldas canyon is the location of a continuous significant sediment transport. The Guayaquil canyon shows several episodes of deposition and incision. Aggrading sedimentation pattern in the canyon records several changes in relative sea-level. The subsidence of the Gulf of Guayaquil probably contributes to the good preservation of the canyon filling stages. The Santa Elena canyon is controlled by a SW-NE trending normal fault. (2) Variations of sediment accumulation and relative vertical motions are shown along-strike the shelf edge. Offshore the uplifted Manta peninsula, a pronounced subsidence of the shelf edge is documented by sedimentary clinoforms that have deposited in a morphological reentrant, and have migrated upslope testifying of a local subsidence meanwhile the adjacent La Plata Island area underwent uplift. In the Esmeraldas canyon area, a local uplift of the shelf is documented. (3) Two neotectonic fault systems with a possible transcurrent component are imaged across the shelf edge and upper margin slope offshore Jama, and Cape Galera. This possible transcurrent motion could be related to the reactivation of ancient faults of the upper plate by the subduction. These preliminary results indicate that the ATACAMES data set has a strong potential to evaluate the spatial and temporal contribution of tectonic and climate changes on the structural development and stratigraphic evolution of the Ecuador continental

  8. The ototronix MAXUM middle ear implant for severe high-frequency sensorineural hearing loss: Preliminary results.

    PubMed

    Hunter, Jacob B; Carlson, Matthew L; Glasscock, Michael E

    2016-09-01

    To report the preliminary results of the Ototronix MAXUM middle ear implant for treatment of severe high-frequency sensorineural hearing loss. Case series with chart review. Six consecutive ears with severe high-frequency sensorineural hearing loss (≥75 dB HL at 2, 3, and 4 kHz) and poor aided word recognition performance (≤60% single words) underwent implantation of the MAXUM system at a single, private otologic referral center. Primary outcome measures included frequency-specific functional gain and word recognition score improvement compared to optimally fitted hearing aids. Six ears, in four adult patients (two female; median age 67.5 years) were included. The median unaided preoperative high-frequency pure-tone average (HFPTA) (2, 3, and 4 kHz) was 80.0 dB (range, 75.0-85.0 dB), and the median best-aided word recognition score was 48.0% (range, 24%-60%). The median HFPTA functional gain with the MAXUM system was 47.2 dB, a 25.0 dB improvement (range, 16.7-33.3 dB) (P = .03) over optimally fit hearing aids, and the median word recognition score with MAXUM was 81.5%, a 42.0% improvement (range, 20%-48%) (P = .03) with the MAXUM middle ear implant over optimally fitted hearing aids. These preliminary data demonstrate that the MAXUM middle ear implant provides superior functional gain and word recognition scores in quiet for patients with severe high-frequency sensorineural hearing loss compared to optimally fitted hearing aids. Future studies with greater patient numbers and patient reported outcome measures are needed to confirm these promising but preliminary results. 4 Laryngoscope, 126:2124-2127, 2016. © 2016 The American Laryngological, Rhinological and Otological Society, Inc.

  9. Heavy and Superheavy Atomic Nuclei

    NASA Astrophysics Data System (ADS)

    Sobiczewski, Adam

    2008-10-01

    The appearance and development of the concept of super-heavy atomic nuclei are described. The concept appeared during the studies of the limits of the nuclear chart and of the periodic table of the chemical elements. The article concentrates on theoretical studies of the properties of heaviest nuclei. Results of these studies are illustrated and discussed. Prospects for a nearest future of the research of heaviest nuclei are outlined.

  10. Collaborative Care for Patients With Severe Personality Disorders: Preliminary Results and Active Ingredients From a Pilot Study (Part I).

    PubMed

    Stringer, Barbara; van Meijel, Berno; Karman, Pieter; Koekkoek, Bauke; Hoogendoorn, Adriaan W; Kerkhof, Ad J F M; Beekman, Aartjan T F

    2015-07-01

    To test if a collaborative care program (CCP) with nurses in a coordinating position is beneficial for patients with severe personality disorders. A pilot study with a comparative multiple case study design using mixed methods investigating active ingredients and preliminary results. Most patients, their informal caregivers, and nurses value (parts of) the CCP positively; preliminary results show a significant decrease in severity of borderline symptoms. With the CCP, we may expand the supply of available treatments for patients with (severe) personality disorders, but a larger randomized controlled trial is warranted to confirm our preliminary results. © 2014 Wiley Periodicals, Inc.

  11. Peak Seeking Control for Reduced Fuel Consumption with Preliminary Flight Test Results

    NASA Technical Reports Server (NTRS)

    Brown, Nelson

    2012-01-01

    The Environmentally Responsible Aviation project seeks to accomplish the simultaneous reduction of fuel burn, noise, and emissions. A project at NASA Dryden Flight Research Center is contributing to ERAs goals by exploring the practical application of real-time trim configuration optimization for enhanced performance and reduced fuel consumption. This peak-seeking control approach is based on Newton-Raphson algorithm using a time-varying Kalman filter to estimate the gradient of the performance function. In real-time operation, deflection of symmetric ailerons, trailing-edge flaps, and leading-edge flaps of a modified F-18 are directly optimized, and the horizontal stabilators and angle of attack are indirectly optimized. Preliminary results from three research flights are presented herein. The optimization system found a trim configuration that required approximately 3.5% less fuel flow than the baseline trim at the given flight condition. The algorithm consistently rediscovered the solution from several initial conditions. These preliminary results show the algorithm has good performance and is expected to show similar results at other flight conditions and aircraft configurations.

  12. Upper Stratospheric Temperature Climatology Derived from SAGE II Observations: Preliminary Results

    NASA Technical Reports Server (NTRS)

    Wang, P.-H.; Cunnold, D. M.; Wang, H. J.; Chu, W. P.; Thomason, L. W.

    2002-01-01

    This study shows that the temperature information in the upper stratosphere can be derived from the SAGE II 385-mn observations. The preliminary results indicate that the zonal mean temperature increases with altitude below 50 km and decreases above 50 km. At 50 km, a regional maximum of 263 K is located in the tropics, and a minimum of 261 K occurs in the subtropics in both hemispheres. The derived long-term temperature changes from 1985 to 1997 reveal a statistically significant negative trend of -2 to -2.5 K/decade in the tropical upper stratosphere and about -2 K/decade in the subtropics near the stratopause. At latitudes poleward of 50, the results show a statistically significant positive trend of about 1 K/decade in the upper stratosphere. The preliminary results also show large annual temperature oscillations in the extratropics with a maximum amplitude of approx. 8 K located at about 44 km near 50 in both hemispheres during local summer. In addition, the semiannual oscillation is found to be a maximum in the tropics with a peak amplitude of approx. 3.3 K located at about 42 km during the equinox.

  13. An Integrated, Acceptance-Based Behavioral Approach for Depression With Social Anxiety: Preliminary Results.

    PubMed

    Dalrymple, Kristy L; Morgan, Theresa A; Lipschitz, Jessica M; Martinez, Jennifer H; Tepe, Elizabeth; Zimmerman, Mark

    2014-07-01

    Depression and social anxiety disorder (SAD) are highly comorbid, resulting in greater severity and functional impairment compared with each disorder alone. Although recently transdiagnostic treatments have been developed, no known treatments have addressed this comorbidity pattern specifically. Preliminary support exists for acceptance-based approaches for depression and SAD separately, and they may be more efficacious for comorbid depression and anxiety compared with traditional cognitive-behavioral approaches. The aim of the current study was to develop and pilot test an integrated acceptance-based behavioral treatment for depression and comorbid SAD. Participants included 38 patients seeking pharmacotherapy at an outpatient psychiatry practice, who received 16 individual sessions of the therapy. Results showed significant improvement in symptoms, functioning, and processes from pre- to post-treatment, as well as high satisfaction with the treatment. These results support the preliminary acceptability, feasibility, and effectiveness of this treatment in a typical outpatient psychiatry practice, and suggest that further research on this treatment in larger randomized trials is warranted. © The Author(s) 2014.

  14. An Integrated, Acceptance-Based Behavioral Approach for Depression With Social Anxiety: Preliminary Results

    PubMed Central

    Dalrymple, Kristy L.; Morgan, Theresa A.; Lipschitz, Jessica M.; Martinez, Jennifer H.; Tepe, Elizabeth; Zimmerman, Mark

    2016-01-01

    Depression and social anxiety disorder (SAD) are highly comorbid, resulting in greater severity and functional impairment compared with each disorder alone. Although recently transdiagnostic treatments have been developed, no known treatments have addressed this comorbidity pattern specifically. Preliminary support exists for acceptance-based approaches for depression and SAD separately, and they may be more efficacious for comorbid depression and anxiety compared with traditional cognitive-behavioral approaches. The aim of the current study was to develop and pilot test an integrated acceptance-based behavioral treatment for depression and comorbid SAD. Participants included 38 patients seeking pharmacotherapy at an outpatient psychiatry practice, who received 16 individual sessions of the therapy. Results showed significant improvement in symptoms, functioning, and processes from pre- to post-treatment, as well as high satisfaction with the treatment. These results support the preliminary acceptability, feasibility, and effectiveness of this treatment in a typical outpatient psychiatry practice, and suggest that further research on this treatment in larger randomized trials is warranted. PMID:24402463

  15. Preliminary results of the CRISP 3D seismic experiment, offshore Costa Rica

    NASA Astrophysics Data System (ADS)

    Bangs, N. L.; McIntosh, K. D.; Silver, E. A.; Ranero, C. R.; Kluesner, J. W.; von Huene, R.; Cavanaugh, S.; Graf, S.; Cameselle, A. L.; Baracco, A. M.; Nuñez, E.

    2011-12-01

    In April and May of 2011, we acquired a new 3D seismic reflection data volume offshore Costa Rica, northwest of the Osa Peninsula. The goal of the survey was to examine the crustal structure and deformation history of this collision zone, and to clearly image the plate-boundary fault from the trench and into the seismogenic zone. These data will also help locate a deep site for riser drilling as part of the CRISP drilling program. The 3D survey covered 55 km across the upper shelf and slope, and into the trench. It extended 11 km along strike for a total survey area of 11 x 55 km. These data were acquired with the R/V Langseth using a 3300 cubic inch source shot every 50 m. We recorded the data on four 6-km-long, 468-channel streamers with 150m separation. We have preliminary results from processing 2D seismic lines extracted from the 3D volume, and from initial 3D volume processing. In the preliminary images we can trace strong seismic reflections from the plate-boundary fault down to 3 s two-way travel time (approx. 5 km depth) below the seafloor and 26 km landward from the trench. The plate-boundary fault reflection amplitudes decrease substantially with depth and are difficult to depict on these preliminary profiles. The upper plate structure shows numerous faults, many extending down to the plate-interface, and intense folding and faulting of the slope cover sequences. Currently these data are being processed by the Spanish oil company, Repsol, and should reveal far more detail with complete 3D processing.

  16. Exotic Nuclei

    SciTech Connect

    Galindo-Uribarri, Alfredo {nmn}

    2010-01-01

    Current experimental developments on the study of exotic nuclei far from the valley of stability are discussed. I start with general aspects related to the production of radioactive beams followed by the description of some of the experimental tools and specialized techniques for studies in reaction spectroscopy, nuclear structure research and nuclear applications with examples from selected topical areas with which I have been involved. I discuss some of the common challenges faced in Accelerator Mass Spectrometry (AMS) and Radioactive Ion Beam (RIB) science.

  17. Preliminary Results from CINDERS: Circularized IFUs Now Deployed using Economical Robots on SOAR

    NASA Astrophysics Data System (ADS)

    McBride, JoEllen; Cecil, G. N.

    2014-01-01

    Long slit spectroscopy provides stellar population and activity information along an entire axis of a target. Single fiber spectroscopy focuses in on specific regions of galaxies, such as the center. We discuss preliminary results from the addition of the CINDERS IFU module to the Goodman Spectrograph on the SOAR telescope, which provides the next stage, spatially resolved spectroscopy. CINDERS deploys three bundles of 61 fiber optic cables arranged in a nested circular pattern using inexpensive actuators that control 3-axis motion stages. The optics allow for 0.77" sampling of an 7" diameter region of up to three objects simultaneously in a 9'x4.5' field of view, making CINDERS ideal for clustered targets with more than 100" separation. Because approximately 78% of the bundle face is light sensitive, it is necessary to dither observations by 0.38" in a triangular pattern to adequately recover spatial resolution of the target. Using the 400 line/mm grating produces spectral coverage over 3700-7200AA at 5AA resolution. Initial system throughput measurements (excluding atmosphere), in the V-band, for one of the bundles are 65%. The initial project utilizing CINDERS involves mapping the central regions of 44 galaxies in Southern Compact Groups and determining the amount of star formation and AGN activity compared to isolated galaxies. We will discuss preliminary results for several of these groups.

  18. Receiver function survey of Earthscope sites in the Pacific North West; preliminary results

    NASA Astrophysics Data System (ADS)

    Nikulin, A.; Marshall, B.; Levin, V. L.; Park, J. J.

    2009-12-01

    Receiver function gathers constructed from teleseismic source data allow probing for velocity contrasts at crustal and upper mantle depths and relating them to regional tectonic settings. In this presentation we show and discuss the results of our preliminary work with the newly available Earthscope dataset; a set of receiver function profiles from seismic stations throughout the Cascadia region of the Pacific North West. We use receiver function methodology to constrain upper crustal structure throughout the region and assign data quality ranking to all regional Earthscope sites. Preliminary results allow us to discern differences in subsurface velocity structure between stations based on their position relative to the subduction trench axis. We group stations based on similarity of receiver function signatures and discuss possible tectonic conditions to accommodate this similarity. Dense spacing of Earthscope sites allows tracking the changes of receiver function signatures across shorter distances than permanent station spacing previously allowed. Of particular interest are RFs from stations that lie ~100 km from the coast where the slab crosses 35-45-km depth, where a strongly anisotropic layer is evident, with strong spatial variation in apparent deformation geometry. Hypothetically suctioned upward by slab rollback, a deformed sliver of serpentinite-rich rock above the slab interface would likely display the observed spatial variation in anisotropic symmetry axis within the layer.

  19. High risk cohort study for psychiatric disorders in childhood: rationale, design, methods and preliminary results.

    PubMed

    Salum, Giovanni Abrahão; Gadelha, Ary; Pan, Pedro Mario; Moriyama, Tais Silveira; Graeff-Martins, Ana Soledade; Tamanaha, Ana Carina; Alvarenga, Pedro; Valle Krieger, Fernanda; Fleitlich-Bilyk, Bacy; Jackowski, Andrea; Sato, João Ricardo; Brietzke, Elisa; Polanczyk, Guilherme Vanoni; Brentani, Helena; de Jesus Mari, Jair; Do Rosário, Maria Conceição; Manfro, Gisele Gus; Bressan, Rodrigo Affonseca; Mercadante, Marcos Tomanik; Miguel, Eurípedes Constantino; Rohde, Luis Augusto

    2015-03-01

    The objective of this study is to present the rationale, methods, design and preliminary results from the High Risk Cohort Study for the Development of Childhood Psychiatric Disorders. We describe the sample selection and the components of each phases of the study, its instruments, tasks and procedures. Preliminary results are limited to the baseline phase and encompass: (i) the efficacy of the oversampling procedure used to increase the frequency of both child and family psychopathology; (ii) interrater reliability and (iii) the role of differential participation rate. A total of 9937 children from 57 schools participated in the screening procedures. From those 2512 (random = 958; high risk = 1554) were further evaluated with diagnostic instruments. The prevalence of any child mental disorder in the random strata and high-risk strata was 19.9% and 29.7%. The oversampling procedure was successful in selecting a sample with higher family rates of any mental disorders according to diagnostic instruments. Interrater reliability (kappa) for the main diagnostic instrument range from 0.72 (hyperkinetic disorders) to 0.84 (emotional disorders). The screening instrument was successful in selecting a sub-sample with "high risk" for developing mental disorders. This study may help advance the field of child psychiatry and ultimately provide useful clinical information.

  20. [Development of a computer-assisted system to teach pathologic anatomy. Preliminary results].

    PubMed

    Sobrino, A; Sola, J J; Pardo-Mindán, F J

    1994-04-09

    The present study describes the implantation of an interactive teaching system to improve both the active involvement of the student and the learning quality of Pathology. The preliminary results from the evaluation of such system are also reported. Two attitude questionnaires (rating scale) were passed to a sample of 36 students of Medicine, randomly elected. These students used for 10 weeks a programme of Pathology (Interpat) assisted by computer. Moreover, the data stored after each session by the control stack of this programme are analyzed. The programme is positively evaluated by the users who consider it as an appropriate mode of learning Pathology. In spite of the scarce experience with computers, students have no difficulty in using this programme. 82% of students consider that they learn more Pathology with Interpat than with the traditional system of magistral classes. 63% of students believe that similar systems must be applied in other curricula. The average time of use of the system by each student has been 11 h 45 min (SD 4 h 55 min). The videodisc is the stack more used. There is a good acceptance of this methodology by the students, being almost no difficulty in using the programme, despite their low level of computer knowledge. The program is a potent instrument for individualizing the teaching of Pathology. The small size of the sample, accurate for a preliminary study as this is, must be take into account when generalizing the results.