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  1. Verifying Test Hypotheses -HOL/TestGen Verifying Test Hypotheses -HOL/TestGen

    E-Print Network [OSTI]

    Verifying Test Hypotheses - HOL/TestGen Verifying Test Hypotheses - HOL/TestGen An Experiment in Test and Proof Thomas Malcher January 20, 2014 1 / 20 #12;Verifying Test Hypotheses - HOL/TestGen HOL/TestGen Outline Introduction Test Hypotheses HOL/TestGen - Demo Verifying Test Hypotheses Conclusion 2 / 20 #12

  2. http://hol.sagepub.com/ The Holocene

    E-Print Network [OSTI]

    Gilli, Adrian

    . 425547HOL22410.1177/095968 3611425547Elbert et al.The Holocene 1 University of Bern, Switzerland 2 PAGES International Project Office, Switzerland 3 Universidad de Concepción, Chile 4 University of Geneva, Switzerland 5 SURF-EAWAG, Switzerland 6 Geological Institute, ETH Zurich, Switzerland Received 1 April 2011

  3. Matching concepts across HOL libraries Thibault Gauthier and Cezary Kaliszyk

    E-Print Network [OSTI]

    Kaliszyk, Cezary

    Matching concepts across HOL libraries Thibault Gauthier and Cezary Kaliszyk University of Innsbruck, Austria {thibault.gauthier,cezary.kaliszyk}@uibk.ac.at Abstract. Many proof assistant libraries concepts, like natural num- bers, matching them between libraries is often straightforward, because

  4. The Semantics of Power and ARM Multiprocessor Machine The HOL Specification

    E-Print Network [OSTI]

    Sewell, Peter

    The Semantics of Power and ARM Multiprocessor Machine Code The HOL Specification Jade Alglave2 Contents i Full Contents ii i #12;BRIEF CONTENTS ii I common coretypes 1 II common types 3 III ppc arm axiomatic model 6 IV arm coretypes 14 V arm types 19 VI arm ast 21 VII arm opsem 24 VIII arm seq monad 36 IX

  5. The Semantics of Power and ARM Multiprocessor Machine The HOL Specification

    E-Print Network [OSTI]

    Sewell, Peter

    The Semantics of Power and ARM Multiprocessor Machine Code The HOL Specification Jade Alglave 2 III ppc arm axiomatic model 6 IV arm coretypes 14 V arm types 19 VI arm ast 21 VII arm opsem 24 VIII arm seq monad 36 IX arm event monad 43 X arm decoder 51 XI arm program 55 XII ppc coretypes 58 XIII

  6. LY

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and700, 1.Reports1E~LONG-TERM SURVEILLANCE PLAN FOR!

  7. Mapping the Cosmic Web with Ly-alpha Emission

    E-Print Network [OSTI]

    Steven Furlanetto; Joop Schaye; Volker Springel; Lars Hernquist

    2003-10-31

    We use a high-resolution cosmological simulation to predict the distribution of HI Ly-alpha emission from the low-redshift (z10^2 kpc) ``coronae'' of optically thin gas with Ly-alpha surface brightness close to the expected background. Most of these regions contain smaller cores of dense, cool gas. Unless self-shielded gas is able to cool to Tweb.

  8. Ly? heating of inhomogeneous high-redshift intergalactic medium

    SciTech Connect (OSTI)

    Oklop?i?, Antonija; Hirata, Christopher M., E-mail: oklopcic@astro.caltech.edu [Cahill Center for Astronomy and Astrophysics, California Institute of Technology, MC 249-17, 1200 East California Boulevard, Pasadena, CA 91125 (United States)

    2013-12-20

    The intergalactic medium (IGM) prior to the epoch of reionization consists mostly of neutral hydrogen gas. Lyman-? (Ly?) photons produced by early stars resonantly scatter off hydrogen atoms, causing energy exchange between the radiation field and the gas. This interaction results in moderate heating of the gas due to the recoil of the atoms upon scattering, which is of great interest for future studies of the pre-reionization IGM in the H I 21 cm line. We investigate the effect of this Ly? heating in the IGM with linear density, temperature, and velocity perturbations. Perturbations smaller than the diffusion length of photons could be damped due to heat conduction by Ly? photons. The scale at which damping occurs and the strength of this effect depend on various properties of the gas, the flux of Ly? photons, and the way in which photon frequencies are redistributed upon scattering. To find the relevant length scale and the extent to which Ly? heating affects perturbations, we calculate the gas heating rates by numerically solving linearized Boltzmann equations in which scattering is treated by the Fokker-Planck approximation. We find that (1) perturbations add a small correction to the gas heating rate, and (2) the damping of temperature perturbations occurs at scales with comoving wavenumber k ? 10{sup 4} Mpc{sup –1}, which are much smaller than the Jeans scale and thus unlikely to substantially affect the observed 21 cm signal.

  9. LINKING Ly? AND LOW-IONIZATION TRANSITIONS AT LOW OPTICAL DEPTH

    SciTech Connect (OSTI)

    Jaskot, A. E.; Oey, M. S.

    2014-08-20

    We suggest that low optical depth in the Lyman continuum (LyC) may relate the Ly? emission, C II and Si II absorption, and C II* and Si II* emission seen in high-redshift galaxies. We base this analysis on Hubble Space Telescope Cosmic Origins Spectrograph spectra of four Green Pea (GP) galaxies, which may be analogs of z > 2 Ly? emitters (LAEs). In the two GPs with the strongest Ly? emission, the Ly? line profiles show reduced signs of resonant scattering. Instead, the Ly? profiles resemble the H? line profiles of evolved star ejecta, suggesting that the Ly? emission originates from a low column density and similar outflow geometry. The weak C II absorption and presence of non-resonant C II* emission in these GPs support this interpretation and imply a low LyC optical depth along the line of sight. In two additional GPs, weak Ly? emission and strong C II absorption suggest a higher optical depth. These two GPs differ in their Ly? profile shapes and C II* emission strengths, however, indicating different inclinations of the outflows to our line of sight. With these four GPs as examples, we explain the observed trends linking Ly?, C II, and C II* in stacked LAE spectra, in the context of optical depth and geometric effects. Specifically, in some galaxies with strong Ly? emission, a low LyC optical depth may allow Ly? to escape with reduced scattering. Furthermore, C II absorption, C II* emission, and Ly? profile shape can reveal the optical depth, constrain the orientation of neutral outflows in LAEs, and identify candidate LyC emitters.

  10. z ? 1 Ly? emitters. I. The luminosity function , , ,

    SciTech Connect (OSTI)

    Wold, Isak G. B.; Barger, Amy J.; Cowie, Lennox L. E-mail: barger@astro.wisc.edu

    2014-03-10

    We construct a flux-limited sample of 135 candidate z ? 1 Ly? emitters (LAEs) from Galaxy Evolution Explorer (GALEX) grism data using a new data cube search method. These LAEs have luminosities comparable to those at high redshifts and lie within a 7 Gyr gap present in existing LAE samples. We use archival and newly obtained optical spectra to verify the UV redshifts of these LAEs. We use the combination of the GALEX UV spectra, optical spectra, and X-ray imaging data to estimate the active galactic nucleus (AGN) fraction and its dependence on Ly? luminosity. We remove the AGNs and compute the luminosity function (LF) from 60 z ? 1 LAE galaxies. We find that the best-fit LF implies a luminosity density increase by a factor of ?1.5 from z ? 0.3 to z ? 1 and ?20 from z ? 1 to z ? 2. We find a z ? 1 volumetric Ly? escape fraction of 0.7% ± 0.4%.

  11. Accelerated evolution of the Ly? luminosity function at z ? 7 revealed by the Subaru ultra-deep survey for Ly? emitters at z = 7.3

    SciTech Connect (OSTI)

    Konno, Akira; Ouchi, Masami; Ono, Yoshiaki; Shibuya, Takatoshi; Naito, Yoshiaki; Momose, Rieko; Yuma, Suraphong; Shimasaku, Kazuhiro; Nakajima, Kimihiko; Furusawa, Hisanori; Iye, Masanori

    2014-12-10

    We present the ultra-deep Subaru narrowband imaging survey for Ly? emitters (LAEs) at z = 7.3 in the Subaru/XMM-Newton Deep Survey (SXDS) and Cosmic Evolution Survey (COSMOS) fields (?0.5 deg{sup 2}) with a total integration time of 106 hr. Exploiting our new sharp bandwidth filter, NB101, installed on the Suprime-Cam, we have reached L(Ly?) = 2.4 × 10{sup 42} erg s{sup –1} (5?) for z = 7.3 LAEs, about four times deeper than previous Subaru z ? 7 studies, which allows us to reliably investigate the evolution of the Ly? luminosity function (LF) for the first time down to the luminosity limit same as those of Subaru z = 3.1-6.6 LAE samples. Surprisingly, we only find three and four LAEs in the SXDS and COSMOS fields, respectively, while one expects a total of ?65 LAEs by our survey in the case of no Ly? LF evolution from z = 6.6 to 7.3. We identify a decrease of the Ly? LF from z = 6.6 to 7.3 at the >90% confidence level from our z = 7.3 Ly? LF with the best-fit Schechter parameters of L{sub Ly?}{sup ?}=2.7{sub ?1.2}{sup +8.0}×10{sup 42} erg s{sup ?1} and ?{sup ?}=3.7{sub ?3.3}{sup +17.6}×10{sup ?4} Mpc{sup ?3} for a fixed ? = –1.5. Moreover, the evolution of the Ly? LF is clearly accelerated at z > 6.6 beyond the measurement uncertainties including cosmic variance. Because no such accelerated evolution of the UV-continuum LF or the cosmic star formation rate (SFR) is found at z ? 7, but suggested only at z > 8, this accelerated Ly? LF evolution is explained by physical mechanisms different from a pure SFR decrease but related to the Ly? production and escape in the process of cosmic reionization. Because a simple accelerating increase of intergalactic medium neutral hydrogen absorbing Ly? cannot be reconciled with Thomson scattering of optical depth measurements from WMAP and Planck, our findings may support new physical pictures suggested by recent theoretical studies, such as the existence of HI clumpy clouds within cosmic ionized bubbles that are selectively absorbing Ly? and the large ionizing photon escape fraction of galaxies causing weak Ly? emission.

  12. Supporting Information -S1-Q. Sun, H. Nelson, T. Ly, B. M. Stoltz, R. R. Julian

    E-Print Network [OSTI]

    Stoltz, Brian M.

    Supporting Information -S1- Q. Sun, H. Nelson, T. Ly, B. M. Stoltz, R. R. Julian Supporting Data.............................................S7 #12;Supporting Information -S2- Q. Sun, H. Nelson, T. Ly, B. M. Stoltz, R. R. Julian Figure S1 Information -S3- Q. Sun, H. Nelson, T. Ly, B. M. Stoltz, R. R. Julian Figure S2 Figure S2a: CID of [RPPGFSPFR

  13. A z ? 5.7 Ly? emission line with an ultrabroad red wing

    SciTech Connect (OSTI)

    Yang, Huan; Wang, JunXian [CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026 (China); Zheng, Zhen-Ya; Malhotra, Sangeeta; Rhoads, James E. [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States); Infante, Leopoldo, E-mail: yanghuan@mail.ustc.edu.cn, E-mail: jxw@mail.ustc.edu.cn, E-mail: zzheng13@asu.edu, E-mail: smalhotr@asu.edu, E-mail: james.rhoads@asu.edu, E-mail: linfante@astro.puc.cl [Institute of Astrophysics, Ponticia Universidad Catolica, Santiago (Chile)

    2014-03-20

    Using the Ly? emission line as a tracer of high-redshift, star-forming galaxies, hundreds of Ly? emission line galaxies (LAEs) at z > 5 have been detected. These LAEs are considered to be low-mass young galaxies, critical to the re-ionization of the universe and the metal enrichment of the circumgalactic medium (CGM) and the intergalactic medium (IGM). It is assumed that outflows in LAEs can help both ionizing photons and Ly? photons escape from galaxies. However, we still know little about the outflows in high-redshift LAEs due to observational difficulties, especially at redshift >5. Models of Ly? radiative transfer predict asymmetric Ly? line profiles with broad red wings in LAEs with outflows. Here, we report a z ? 5.7 Ly? emission line with a broad red wing extending to >1000 km s{sup –1} relative to the peak of Ly? line, which has been detected in only a couple of z > 5 LAEs until now. If the broad red wing is ascribed to gas outflow instead of active galactic nucleus activity, the outflow velocity could be larger than the escape velocity (?500 km s{sup –1}) of a typical halo mass of z ? 5.7 LAEs, which is consistent with the idea that outflows in LAEs disperse metals to CGM and IGM.

  14. COMPUTING INTRINSIC LY{alpha} FLUXES OF F5 V TO M5 V STARS

    SciTech Connect (OSTI)

    Linsky, Jeffrey L. [JILA, University of Colorado and NIST, 440UCB Boulder, CO 80309-0440 (United States)] [JILA, University of Colorado and NIST, 440UCB Boulder, CO 80309-0440 (United States); France, Kevin; Ayres, Tom, E-mail: jlinsky@jilau1.colorado.edu [CASA, University of Colorado, 593UCB Boulder, CO 80309-0593 (United States)] [CASA, University of Colorado, 593UCB Boulder, CO 80309-0593 (United States)

    2013-04-01

    The Ly{alpha} emission line dominates the far-ultraviolet spectra of late-type stars and is a major source for photodissociation of important molecules including H{sub 2}O, CH{sub 4}, and CO{sub 2} in exoplanet atmospheres. The incident flux in this line illuminating an exoplanet's atmosphere cannot be measured directly as neutral hydrogen in the interstellar medium (ISM) attenuates most of the flux reaching the Earth. Reconstruction of the intrinsic Ly{alpha} line has been accomplished for a limited number of nearby stars, but is not feasible for distant or faint host stars. We identify correlations connecting the intrinsic Ly{alpha} flux with the flux in other emission lines formed in the stellar chromosphere, and find that these correlations depend only gradually on the flux in the other lines. These correlations, which are based on Hubble Space Telescope spectra, reconstructed Ly{alpha} line fluxes, and irradiance spectra of the quiet and active Sun, are required for photochemical models of exoplanet atmospheres when intrinsic Ly{alpha} fluxes are not available. We find a tight correlation of the intrinsic Ly{alpha} flux with stellar X-ray flux for F5 V to K5 V stars, but much larger dispersion for M stars. We also show that knowledge of the stellar effective temperature and rotation rate can provide reasonably accurate estimates of the Ly{alpha} flux for G and K stars, and less accurate estimates for cooler stars.

  15. Virtual(ly) Queer: Anti-Genealogy and Obsessive-Compulsion in Bechdels' Fun Home

    E-Print Network [OSTI]

    Gill-Peterson, Julian

    2012-01-01

    will require giving up on genealogy to notice the virtuallyVirtual(ly) Queer: Anti-Genealogy and Obsessive-Compulsionlines are the form of genealogies, the tracing of lines of

  16. FUV Irradiated Disk Atmospheres: Ly$\\alpha$ and the Origin of Hot H$_2$ Emission

    E-Print Network [OSTI]

    Ádámkovics, Máté; Glassgold, Alfred E

    2015-01-01

    Protoplanetary disks are strongly irradiated by a stellar FUV spectrum that is dominated by Ly$\\alpha$ photons. We investigate the impact of stellar Ly$\\alpha$ irradiation on the terrestrial planet region of disks ($\\lesssim 1$AU) using an updated thermal-chemical model of a disk atmosphere irradiated by stellar FUV and X-rays. The radiative transfer of Ly$\\alpha$ is implemented in a simple approach that includes scattering by H I and absorption by molecules and dust. Because of their non-radial propagation path, scattered Ly$\\alpha$ photons deposit their energy deeper in the disk atmosphere than the radially propagating FUV continuum photons. We find that Ly$\\alpha$ has a significant impact on the thermal structure of the atmosphere. Photochemical heating produced by scattered Ly$\\alpha$ photons interacting with water vapor and OH leads to a layer of hot (1500 - 2500 K) molecular gas. The temperature in the layer is high enough to thermally excite the H$_2$ to vibrational levels from which they can be fluore...

  17. The impact of gas bulk rotation on the Ly? line

    SciTech Connect (OSTI)

    Garavito-Camargo, Juan N.; Forero-Romero, Jaime E.; Dijkstra, Mark E-mail: je.forero@uniandes.edu.co

    2014-11-10

    We present results of radiative transfer calculations to measure the impact of gas bulk rotation on the morphology of the Ly? emission line in distant galaxies. We model a galaxy as a sphere with an homogeneous mixture of dust and hydrogen at a constant temperature. These spheres undergo solid-body rotation with maximum velocities in the range 0-300 km s{sup –1} and neutral hydrogen optical depths in the range ?{sub H} = 10{sup 5}-10{sup 7}. We consider two types of source distributions in the sphere: central and homogeneous. Our main result is that rotation introduces a dependence of the line morphology with viewing angle and rotational velocity. Observations with a line of sight parallel to the rotation axis yield line morphologies similar to the static case. For lines of sight perpendicular to the rotation axis, both the intensity at the line center and the line width increase with rotational velocity. Along the same line of sight, the line becomes single peaked at rotational velocities close to half the line width in the static case. Notably, we find that rotation does not induce any spatial anisotropy in the integrated line flux, the escape fraction or the average number of scatterings. This is because Lyman scattering through a rotating solid-body proceeds identically to the static case. The only difference is the Doppler shift from the different regions in the sphere that move with respect to the observer. This allows us to derive an analytic approximation for the viewing-angle dependence of the emerging spectrum, as a function of rotational velocity.

  18. Ly{alpha} RADIATIVE TRANSFER IN COSMOLOGICAL SIMULATIONS USING ADAPTIVE MESH REFINEMENT

    SciTech Connect (OSTI)

    Laursen, Peter [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100, Copenhagen Oe (Denmark); Razoumov, Alexei O. [Institute for Computational Astrophysics, Department of Astronomy and Physics, Saint Mary's University, Halifax, NS, B3H3C3 (Canada); Sommer-Larsen, Jesper [Excellence Cluster Universe, Technische Universitaet Muenchen, Boltzmannstrasse 2, D-85748 Garching (Germany)], E-mail: pela@dark-cosmology.dk, E-mail: razoumov@ap.smu.ca, E-mail: jslarsen@astro.ku.dk

    2009-05-01

    A numerical code for solving various Ly{alpha} radiative transfer (RT) problems is presented. The code is suitable for an arbitrary, three-dimensional distribution of Ly{alpha} emissivity, gas temperature, density, and velocity field. Capable of handling Ly{alpha} RT in an adaptively refined grid-based structure, it enables detailed investigation of the effects of clumpiness of the interstellar (or intergalactic) medium. The code is tested against various geometrically and physically idealized configurations for which analytical solutions exist, and subsequently applied to three different simulated high-resolution 'Lyman-break galaxies', extracted from high-resolution cosmological simulations at redshift z = 3.6. Proper treatment of the Ly{alpha} scattering reveals a diversity of surface brightness (SB) and line profiles. Specifically, for a given galaxy the maximum observed SB can vary by an order of magnitude, and the total flux by a factor of 3-6, depending on the viewing angle. This may provide an explanation for differences in observed properties of high-redshift galaxies, and in particular a possible physical link between Lyman-break galaxies and regular Ly{alpha} emitters.

  19. T. Ly, Lamond Lab protocol Centrifugal Elutriation of NB4 Cells

    E-Print Network [OSTI]

    Lamond, Angus I.

    T. Ly, Lamond Lab protocol Centrifugal Elutriation of NB4 Cells This protocol uses centrifugal the centrifuge at 1000 rpm to remove bubbles trapped in the elutriation chamber. Stop centrifuge and flow rate centrifuge at 1800 rpm. 6. Set FS to 102. 7. If the back pressure increases above 5 psi, stop centrifuge

  20. Foreground contamination in Ly? intensity mapping during the epoch of reionization

    SciTech Connect (OSTI)

    Gong, Yan; Cooray, Asantha; Silva, Marta; Santos, Mario G.

    2014-04-10

    The intensity mapping of Ly? emission during the epoch of reionization will be contaminated by foreground emission lines from lower redshifts. We calculate the mean intensity and the power spectrum of Ly? emission at z ? 7 and estimate the uncertainties according to the relevant astrophysical processes. We find that the low-redshift emission lines from 6563 Å H?, 5007 Å [O III], and 3727 Å [O II] will be strong contaminants on the observed Ly? power spectrum. We make use of both the star formation rate and luminosity functions to estimate the mean intensity and power spectra of the three foreground lines at z ? 0.5 for H?, z ? 0.9 for [O III], and z ? 1.6 for [O II], as they will contaminate the Ly? emission at z ? 7. The [O II] line is found to be the strongest. We analyze the masking of the bright survey pixels with a foreground line above some line intensity threshold as a way to reduce the contamination in an intensity mapping survey. We find that the foreground contamination can be neglected if we remove pixels with fluxes above 1.4 × 10{sup –20} W m{sup –2}.

  1. Ly{alpha} ESCAPE FROM z {approx} 0.03 STAR-FORMING GALAXIES: THE DOMINANT ROLE OF OUTFLOWS

    SciTech Connect (OSTI)

    Wofford, Aida; Leitherer, Claus [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Salzer, John, E-mail: wofford@stsci.edu [Astronomy Department, Indiana University, Swain West 408, 727 East Third Street, Bloomington, IN 47405 (United States)

    2013-03-10

    The usefulness of H I Ly{alpha} photons for characterizing star formation in the distant universe is limited by our understanding of the astrophysical processes that regulate their escape from galaxies. These processes can only be observed in detail out to a few Multiplication-Sign 100 Mpc. Past nearby (z < 0.3) spectroscopic studies are based on small samples and/or kinematically unresolved data. Taking advantage of the high sensitivity of Hubble Space Telescope's Cosmic Origins Spectrograph (COS), we observed the Ly{alpha} lines of 20 H{alpha}-selected galaxies located at =0.03. The galaxies cover a broad range of luminosity, oxygen abundance, and reddening. In this paper, we characterize the observed Ly{alpha} lines and establish correlations with fundamental galaxy properties. We find seven emitters. These host young ({<=}10 Myr) stellar populations have rest-frame equivalent widths in the range 1-12 A, and have Ly{alpha} escape fractions within the COS aperture in the range 1%-12%. One emitter has a double-peaked Ly{alpha} with peaks 370 km s{sup -1} apart and a stronger blue peak. Excluding this object, the emitters have Ly{alpha} and O I {lambda}1302 offsets from H{alpha} in agreement with expanding-shell models and Lyman break galaxies observations. The absorbers have offsets that are almost consistent with a static medium. We find no one-to-one correspondence between Ly{alpha} emission and age, metallicity, or reddening. Thus, we confirm that Ly{alpha} is enhanced by outflows and is regulated by the dust and H I column density surrounding the hot stars.

  2. PREDICTING Ly? AND Mg II FLUXES FROM K AND M DWARFS USING GALAXY EVOLUTION EXPLORER ULTRAVIOLET PHOTOMETRY

    SciTech Connect (OSTI)

    Shkolnik, Evgenya L.; Rolph, Kristina A.; Peacock, Sarah; Barman, Travis S. E-mail: kristina.rolph@fandm.edu E-mail: barman@lpl.arizona.edu

    2014-11-20

    A star's ultraviolet (UV) emission can greatly affect the atmospheric chemistry and physical properties of closely orbiting planets with the potential for severe mass loss. In particular, the Ly? emission line at 1216 Å, which dominates the far-ultraviolet (FUV) spectrum, is a major source of photodissociation of important atmospheric molecules such as water and methane. The intrinsic flux of Ly?, however, cannot be directly measured due to the absorption of neutral hydrogen in the interstellar medium and contamination by geocoronal emission. To date, reconstruction of the intrinsic Ly? line based on Hubble Space Telescope spectra has been accomplished for 46 FGKM nearby stars, 28 of which have also been observed by the Galaxy Evolution Explorer (GALEX). Our investigation provides a correlation between published intrinsic Ly? and GALEX far- and near-ultraviolet (NUV) chromospheric fluxes for K and M stars. The negative correlations between the ratio of the Ly? to the GALEX fluxes reveal how the relative strength of Ly? compared to the broadband fluxes weakens as the FUV and NUV excess flux increase. We also correlate GALEX fluxes with the strong NUV Mg II h+k spectral emission lines formed at lower chromospheric temperatures than Ly?. The reported correlations provide estimates of intrinsic Ly? and Mg II fluxes for the thousands of K and M stars in the archived GALEX all-sky surveys. These will constrain new stellar upper atmosphere models for cool stars and provide realistic inputs to models describing exoplanetary photochemistry and atmospheric evolution in the absence of UV spectroscopy.

  3. The HETDEX pilot survey. V. The physical origin of Ly? emitters probed by near-infrared spectroscopy

    SciTech Connect (OSTI)

    Song, Mimi; Finkelstein, Steven L.; Gebhardt, Karl; Hill, Gary J.; Drory, Niv; Chonis, Taylor; Jogee, Shardha; Livermore, Rachael [Department of Astronomy, The University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712 (United States); Ashby, Matthew L. N.; Fazio, Giovanni G.; Huang, Jia-Sheng [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Blanc, Guillermo A. [Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Bridge, Joanna; Ciardullo, Robin; Gronwall, Caryl; Hagen, Alex; Schneider, Donald P. [Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States); Fabricius, Maximilian; Gawiser, Eric [Department of Physics and Astronomy, Rutgers University, Piscataway, NJ 08854 (United States); Salmon, Brett, E-mail: mmsong@astro.as.utexas.edu [Department of Physics and Astronomy, Texas A and M University, College Station, TX 77843 (United States); and others

    2014-08-10

    We present the results from a Very Large Telescope/SINFONI and Keck/NIRSPEC near-infrared spectroscopic survey of 16 Ly? emitters (LAEs) at z = 2.1-2.5 in the COSMOS and GOODS-N fields discovered from the Hobby Eberly Telescope Dark Energy Experiment Pilot Survey. We detect rest-frame optical nebular lines (H? and/or [O III] ?5007) for 10 of the LAEs and measure physical properties, including the star formation rate (SFR), gas-phase metallicity, gas mass fraction, and Ly? velocity offset. We find that LAEs may lie below the mass-metallicity relation for continuum-selected star-forming galaxies at the same redshift. The LAEs all show velocity shifts of Ly? relative to the systemic redshift ranging between +85 and +296 km s{sup –1} with a mean of +180 km s{sup –1}. This value is smaller than measured for continuum-selected star-forming galaxies at similar redshifts. The Ly? velocity offsets show a moderate correlation with the measured SFR (2.5?), but no significant correlations are seen with the SFR surface density, specific SFR, stellar mass, or dynamical mass (?1.5?). Exploring the role of dust, kinematics of the interstellar medium (ISM), and geometry on the escape of Ly? photons, we find no signature of selective quenching of resonantly scattered Ly? photons. However, we also find no evidence that a clumpy ISM is enhancing the Ly? equivalent width. Our results suggest that the low metallicity in LAEs may be responsible for yielding an environment with a low neutral hydrogen column density and less dust, easing the escape of Ly? photons over that in continuum-selected star-forming galaxies.

  4. Mean Transmitted Flux in the Ly$\\alpha$ Forest From a Sample of 2QZ Quasars

    E-Print Network [OSTI]

    Polinovskyi, G

    2011-01-01

    The power spectrum of transmitted flux in the Ly$\\alpha$ forest in spectra of distant quasars gives us an information about matter power spectrum on the smallest spatial scales which is very important for testing of different models of dark matter. Only a few independent samples of spectra obtained on diferent instruments have been used for this purpose, thus using of additional independent sample is useful for verification an existing results. We used the data from the 2dF (Two-degree Field) QSO Redshift Survey (2QZ) to obtain the mean transmitted flux for three different redshift bins. After visual inspection and rejection of spectra with broad absorption lines, damped Ly$\\alpha$ systems and low signal-to-noise ratio spectra our final sample contains 655 quasars with redshift range 2.3 $Ly$\\alpha$ forest as a function of redshift within the range 2.1 $&...

  5. He II Ly{beta} GUNN-PETERSON ABSORPTION: NEW HST OBSERVATIONS AND THEORETICAL EXPECTATIONS

    SciTech Connect (OSTI)

    Syphers, David; Pieri, Matthew; Shull, J. Michael; Anderson, Scott F.; Zheng, Wei; Kriss, Gerard A.; Smith, Britton; Meiksin, Avery; Schneider, Donald P.; York, Donald G.

    2011-12-01

    Observations of He II Ly{alpha} Gunn-Peterson troughs have proved to be a valuable probe of the epoch of helium reionization at z {approx} 3. Since this optical depth can become unmeasurably large even for modest He II fractions, various alternate techniques have been proposed to push to higher redshift, and among the more promising is looking at higher-order Lyman-series troughs. We here report four new observations of the He II Ly{beta} trough, including new data on the only sightline with a prior Ly{beta} observation. However, the effective optical depth ratio {tau}{sub eff,{beta}}/{tau}{sub eff,{alpha}} is not simply predicted by f{sub {beta}}{lambda}{sub {beta}}/f{sub {alpha}}{lambda}{sub {alpha}} = 0.16, and we analyze cosmological simulations to find that the correct ratio for helium at z {approx} 3 is {approx_equal}0.35. In one case we infer {tau}{sub eff,{alpha}} > 8.8, strong evidence that helium was not fully reionized at z = 3.2-3.5, in agreement with previous measurements suggesting a later completion of reionization.

  6. BROAD Ly{alpha} EMISSION FROM THREE NEARBY BL LACERTAE OBJECTS

    SciTech Connect (OSTI)

    Stocke, John T.; Danforth, Charles W. [CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, 389-UCB, Boulder, CO 80309 (United States); Perlman, Eric S., E-mail: danforth@casa.colorado.edu, E-mail: stocke@casa.colorado.edu, E-mail: eperlman@fit.edu [Florida Institute of Technology, Physics and Space Sciences Department, 150 West University Boulevard, Melbourne, FL 32901 (United States)

    2011-05-10

    We present far-UV HST/COS spectra of four nearby BL Lac objects. BL Lac spectra are dominated by a smooth, power-law continuum which arises in a relativistic jet. However, the spectra are not necessarily featureless; weak, broad- and/or narrow-line emission is sometimes seen in high-quality optical spectra. We present detections of Ly{alpha} emission in HST/COS spectra of Mrk 421 (z = 0.030) and PKS 2005-489 (z = 0.071) as well as an archival HST/GHRS observation of Mrk 501 (z = 0.0337). Archival HST/STIS observations of PKS 2155-304 (z = 0.116) show no Ly{alpha} emission to a very low upper limit. Using the assumption that the broad-line region (BLR) clouds are symmetrically placed around the active galactic nucleus (AGN), we use these measured Ly{alpha} emission features to constrain either the relativistic {Gamma} values for the ionizing continuum produced by the jet (in the ionization-bounded case) or the mass of warm gas (in the density-bounded case). While realistic {Gamma} values can be obtained for all four cases, the values for Mrk 421 and PKS 2155-304 are high enough to suggest that covering factors of BLR clouds of {approx}1%-2% might be required to provide consistency with earlier values of Doppler boosting and viewing angles suggested for this class of BL Lacs. This discrepancy also exists in the case of M 87, where the amount of Doppler boosting in our direction is expected to be minimal, again suggestive of a small covering factor of BLR clouds. If, as these small covering factors might suggest, the assumptions of a density-bounded model could be more correct, then the observed Ly{alpha} luminosities require that BL Lac/FR 1 nuclei possess very little warm gas (10{sup -4} to 10{sup -5} M{sub sun}) as suggested by Guilbert et al. If these clouds are in pressure balance with a hotter ({approx}10{sup 6} K) gas, the BLR contains too little mass to power the AGN by accretion alone.

  7. A simple analytical model for the abundance of damped Ly-?absorbers

    E-Print Network [OSTI]

    T. Roy Choudhury; T. Padmanabhan

    2002-04-01

    A simple analytical model for estimating the fraction (\\Omega_{gas}) of matter in gaseous form within the collapsed dark matter (DM) haloes is presented. The model is developed using (i) the Press-Schechter formalism to estimate the fraction of baryons in DM haloes, and (ii) the observational estimates of the star formation rate at different redshifts. The prediction for \\Omega_{gas} from the model is in broad agreement with the observed abundance of the damped Ly-\\alpha systems. Furthermore, it can be used for estimating the circular velocities of the collapsed haloes at different redshifts, which could be compared with future observations.

  8. We present HI observations of the environment of three nearby (~ 2000-2500 km s-1 ) Ly-absorbers. The absorbers are located along the sight lines towards Markarian 817, Markarian 509 and VII Zwicky 118. The

    E-Print Network [OSTI]

    Hibbard, John

    ABSTRACT We present HI observations of the environment of three nearby (~ 2000-2500 km s-1 ) Ly. We thus find, by comparing to the HI mass function, that there is 4 to 5 times more HI around Ly- absorbers than on average in the sky. The HI Environment of Nearby Ly-alpha Absorbers INTRODUCTION Numerical

  9. P.G. Ioannou and L.Y. Liu Advanced Construction Technology System ACTS Advanced Construction Technology System ACTS

    E-Print Network [OSTI]

    a history of long lead-times for technology transfer (CICE B-2 1982). The productivity growth rateP.G. Ioannou and L.Y. Liu Advanced Construction Technology System ­ ACTS 1 Advanced Construction Technology System ­ ACTS By P. G. Ioannou,1 A.M. ASCE, and L. Y. Liu,2 A.M. ASCE ABSTRACT: The Advanced

  10. with Earth's Theia component; thus, it is present-ly not possible to obtain information on D17

    E-Print Network [OSTI]

    Napp, Nils

    with Earth's Theia component; thus, it is present- ly not possible to obtain information on D17 O of the proto-Earth. An alternative explanation for the isotope difference between Earth and the Moon is that the D17 O value of Earth was modified by late- accreting material (late veneer) after the for- mation

  11. LyMAS: Predicting Large-Scale Lyman-alpha Forest Statistics from the Dark Matter Density Field

    E-Print Network [OSTI]

    Peirani, Sébastien; Colombi, Stéphane; Blaizot, Jérémy; Dubois, Yohan; Pichon, Christophe

    2013-01-01

    [abridged] We describe LyMAS (Ly-alpha Mass Association Scheme), a method of predicting clustering statistics in the Ly-alpha forest on large scales from moderate resolution simulations of the dark matter distribution, with calibration from high-resolution hydrodynamic simulations of smaller volumes. We use the "Horizon MareNostrum" simulation, a 50 Mpc/h comoving volume evolved with the adaptive mesh hydrodynamic code RAMSES, to compute the conditional probability distribution P(F_s|delta_s) of the transmitted flux F_s, smoothed (1-dimensionally) over the spectral resolution scale, on the dark matter density contrast delta_s, smoothed (3-dimensionally) over a similar scale. In this study we adopt the spectral resolution of the SDSS-III BOSS at z=2.5, and we find optimal results for a dark matter smoothing length sigma=0.3 Mpc/h (comoving). In extended form, LyMAS exactly reproduces both the 1-dimensional power spectrum and 1-point flux distribution of the hydro simulation spectra. Applied to the MareNostrum ...

  12. HUBBLE/COS OBSERVATIONS OF THE Ly{alpha} FOREST TOWARD THE BL Lac OBJECT 1ES 1553+113

    SciTech Connect (OSTI)

    Danforth, Charles W.; Keeney, Brian A.; Stocke, John T.; Shull, J. Michael; Yao Yangsen, E-mail: danforth@casa.colorado.ed [CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, 389-UCB, Boulder, CO 80309 (United States)

    2010-09-01

    We present new moderate-resolution, far-ultraviolet spectra from the Hubble Space Telescope/Cosmic Origins Spectrograph (HST/COS) of the BL Lac object 1ES 1553+113 covering the wavelength range 1135 A < {lambda} < 1795 A. The data show a smooth continuum with a wealth of narrow (b < 100 km s{sup -1}) absorption features arising in the interstellar medium and intergalactic medium. These features include 41 Ly{alpha} absorbers at 0 < z{sub abs} < 0.43, 14 of which are detected in multiple Lyman lines and 6 of which show absorption in one or more metal lines. We analyze a metal-rich triplet ({Delta}cz {approx} 1000 km s{sup -1}) of Ly{alpha} absorbers at z{sub abs} {approx} 0.188 in which O VI, N V, and C III absorption is detected. Silicon ions (Si III, Si IV) are not detected to fairly strong upper limits and we use the measured Si III/C III upper limit to derive an abundance limit (C/Si) {>=} 4(C/Si){sub sun} for the strongest component of the absorber complex. Galaxy redshift surveys show a number of massive galaxies at approximately the same redshift as this absorption complex, suggesting that it arises in a large-scale galaxy filament. As one of the brightest extragalactic X-ray and {gamma}-ray sources, 1ES 1553+113 is of great interest to the high-energy astrophysics community. With no intrinsic emission or absorption features, 1ES 1553+113 has no direct redshift determination. We use intervening Ly{alpha} absorbers to place a direct limit on the redshift: z{sub em}>0.395 based on a confirmed Ly{alpha}+O VI absorber and z{sub em}>0.433 based on a single-line detection of Ly{alpha}. The current COS data are only sensitive to Ly{alpha} absorbers at z < 0.47, but we present statistical arguments that z{sub em} {approx}< 0.58 (at a 1{sigma} confidence limit) based on the non-detection of any Ly{beta} absorbers at z>0.4.

  13. THE ANGULAR DISTRIBUTION OF Ly{alpha} RESONANT PHOTONS EMERGING FROM AN OPTICALLY THICK MEDIUM

    SciTech Connect (OSTI)

    Yang Yang; Shu Chiwang [Division of Applied Mathematics, Brown University, Providence, RI 02912 (United States); Roy, Ishani [Imaging Sciences and Biomedical Engineering Division, St Thomas Hospital, Kings College London, SE1 7EH (United Kingdom); Fang Lizhi [Department of Physics, University of Arizona, Tucson, AZ 85721 (United States)

    2013-07-20

    We investigate the angular distribution of Ly{alpha} photons scattering or emerging from an optically thick medium. Since the evolution of specific intensity I in frequency space and angular space are coupled with each other, we first develop the WENO numerical solver to find the time-dependent solutions of the integro-differential equation of I in frequency and angular space simultaneously. We first show that the solutions with the Eddington approximation, which assume that I is linearly dependent on the angular variable {mu}, yield similar frequency profiles of the photon flux as those without the Eddington approximation. However, the solutions of the {mu} distribution evolution are significantly different from those given by the Eddington approximation. First, the angular distribution of I is found to be substantially dependent on the frequency of the photons. For photons with the resonant frequency {nu}{sub 0}, I contains only a linear term of {mu}. For photons with frequencies at the double peaks of the flux, the {mu}-distribution is highly anisotropic; most photons are emitted radially forward. Moreover, either at {nu}{sub 0} or at the double peaks, the {mu} distributions actually are independent of the initial {mu} distribution of photons of the source. This is because the photons with frequencies either at {nu}{sub 0} or the double peaks undergo the process of forgetting their initial conditions due to resonant scattering. We also show that the optically thick medium is a collimator of photons at the double peaks. Photons from the double peaks form a forward beam with a very small opening angle.

  14. LY? FOREST TOMOGRAPHY FROM BACKGROUND GALAXIES: THE FIRST MEGAPARSEC-RESOLUTION LARGE-SCALE STRUCTURE MAP AT z > 2

    SciTech Connect (OSTI)

    Lee, Khee-Gan; Hennawi, Joseph F.; Eilers, Anna-Christina [Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg (Germany); Stark, Casey; White, Martin [Department of Astronomy, University of California at Berkeley, B-20 Hearst Field Annex 3411, Berkeley, CA 94720 (United States); Prochaska, J. Xavier [Department of Astronomy and Astrophysics, University of California, 1156 High Street, Santa Cruz, CA 95064 (United States); Schlegel, David J. [University of California Observatories, Lick Observatory, 1156 High Street, Santa Cruz, CA 95064 (United States); Arinyo-i-Prats, Andreu [Institut de Ciències del Cosmos, Universitat de Barcelona (IEEC-UB), Martí Franquès 1, E-08028 Barcelona (Spain); Suzuki, Nao [Kavli Institute for the Physics and Mathematics of the Universe (IPMU), The University of Tokyo, Kashiwano-ha 5-1-5, Kashiwa-shi, Chiba (Japan); Croft, Rupert A. C. [Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213 (United States); Caputi, Karina I. [Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700-AV Groningen (Netherlands); Cassata, Paolo [Instituto de Fisica y Astronomia, Facultad de Ciencias, Universidad de Valparaiso, Av. Gran Bretana 1111, Casilla 5030, Valparaiso (Chile); Ilbert, Olivier; Le Brun, Vincent; Le Fèvre, Olivier [Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, F-13388 Marseille (France); Garilli, Bianca [INAF-IASF, Via Bassini 15, I-20133, Milano (Italy); Koekemoer, Anton M. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Maccagni, Dario [INAF-Osservatorio Astronomico di Bologna, Via Ranzani,1, I-40127 Bologna (Italy); Nugent, Peter, E-mail: lee@mpia.de [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States); and others

    2014-11-01

    We present the first observations of foreground Ly? forest absorption from high-redshift galaxies, targeting 24 star-forming galaxies (SFGs) with z ? 2.3-2.8 within a 5' × 14' region of the COSMOS field. The transverse sightline separation is ?2 h {sup –1} Mpc comoving, allowing us to create a tomographic reconstruction of the three-dimensional (3D) Ly? forest absorption field over the redshift range 2.20 ? z ? 2.45. The resulting map covers 6 h {sup –1} Mpc × 14 h {sup –1} Mpc in the transverse plane and 230 h {sup –1} Mpc along the line of sight with a spatial resolution of ?3.5 h {sup –1} Mpc, and is the first high-fidelity map of a large-scale structure on ?Mpc scales at z > 2. Our map reveals significant structures with ? 10 h {sup –1} Mpc extent, including several spanning the entire transverse breadth, providing qualitative evidence for the filamentary structures predicted to exist in the high-redshift cosmic web. Simulated reconstructions with the same sightline sampling, spectral resolution, and signal-to-noise ratio recover the salient structures present in the underlying 3D absorption fields. Using data from other surveys, we identified 18 galaxies with known redshifts coeval with our map volume, enabling a direct comparison with our tomographic map. This shows that galaxies preferentially occupy high-density regions, in qualitative agreement with the same comparison applied to simulations. Our results establish the feasibility of the CLAMATO survey, which aims to obtain Ly? forest spectra for ?1000 SFGs over ?1 deg{sup 2} of the COSMOS field, in order to map out the intergalactic medium large-scale structure at (z) ? 2.3 over a large volume (100 h {sup –1} Mpc){sup 3}.

  15. The Grism Lens-Amplified Survey from Space (GLASS). III. A census of Ly\\alpha\\ Emission at $z\\gtrsim$7 from HST Spectroscopy

    E-Print Network [OSTI]

    Schmidt, K B; Brada?, M; Vulcani, B; Huang, K -H; Hoag, A; Maseda, M; Guaita, L; Pentericci, L; Brammer, G B; Dijkstra, M; Dressler, A; Fontana, A; Henry, A L; Jones, T A; Mason, C; Trenti, M; Wang, X

    2015-01-01

    [abbreviated] We present a census of Ly\\alpha\\ emission at $z\\gtrsim7$ utilizing deep near infrared HST grism spectroscopy from the first six completed clusters of the Grism Lens-Amplified Survey from Space (GLASS). In 24/159 photometrically selected galaxies we detect emission lines consistent with Ly\\alpha\\ in the GLASS spectra. Based on the distribution of signal-to-noise ratios and on simulations we expect the completeness and the purity of the sample to be 40-100% and 60-90%, respectively. For the objects without detected emission lines we show that the observed (not corrected for lensing magnification) 1$\\sigma$ flux limits reaches $5\\times10^{-18}$erg/s/cm$^{2}$ per position angle over the full wavelength range of GLASS (0.8-1.7$\\mu$m). Based on the conditional probability of Ly\\alpha\\ emission measured from the ground at $z\\sim7$ we would have expected 12-18 Ly\\alpha\\ emitters. This is consistent with the number of detections, within the uncertainties, confirming the drop in Ly\\alpha\\ emission with re...

  16. On the nature of H$\\alpha$ emitters at $z \\sim 2$ from the HiZELS survey: physical properties, Ly$\\alpha$ escape fraction, and main sequence

    E-Print Network [OSTI]

    Oteo, I; Ivison, R J; Smail, I; Best, P N; Cepa, J; Pérez-García, A M

    2015-01-01

    We present a detailed multi-wavelength study (from rest-frame UV to far-IR) of narrow-band (NB) selected, star-forming (SF) H$\\alpha$ emitters (HAEs) at $z \\sim 2.23$ taken from the High Redshift(Z) Emission Line Survey (HiZELS). We find that HAEs have similar SED-derived properties and colors to $sBzK$ galaxies and probe a well-defined portion of the SF population at $z \\sim 2$. This is not true for Ly$\\alpha$ emitters (LAEs), which are strongly biased towards blue, less massive galaxies (missing a significant percentage of the SF population). Combining our H$\\alpha$ observations with matched, existing Ly$\\alpha$ data we determine that the Ly$\\alpha$ escape fraction ($f_{\\rm esc}$) is low (only $\\sim$ 4.5\\% of HAEs show Ly$\\alpha$ emission) and decreases with increasing dust attenuation, UV continuum slope, stellar mass, and star formation rate (SFR). This suggests that Ly$\\alpha$ preferentially escapes from blue galaxies with low dust attenuation. However, a small population of red and massive LAEs is also ...

  17. http://hol.sagepub.com/ The Holocene

    E-Print Network [OSTI]

    Anderson, R. Scott

    in the Americas by synthesizing char- coal series spanning the last 2000 years (2 kyr) from an updated version Northern Arizona University, USA 6 Georg-August University, Germany 7 Canadian Forest Service, Canada 8, University of Calgary, Canada 11 University of Tennessee, USA 12 Virginia Tech, USA 13 University of North C

  18. http://hol.sagepub.com/ The Holocene

    E-Print Network [OSTI]

    Bern, Universität

    decline in biomass burning in the Americas by synthesizing char- coal series spanning the last 2000 years, Canada 8 École Pratique des Hautes Études, France 9 University of Bern, Switzerland 10 Biogeoscience Institute, University of Calgary, Canada 11 University of Tennessee, USA 12 Virginia Tech, USA 13 University

  19. Liber QuarterLy 20 (2), October 2010 iSSN: 1435-5205. P179199 http://liber.library.uu.nl/

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    is still quite new to a national library. A website differs from other types of publications in many waysLiber QuarterLy 20 (2), October 2010 ­ iSSN: 1435-5205. P179­199 http://liber.library.uu.nl/ igitur.0 unported License Liber Quarterly Volume 20 Issue 2 2010 179 Introducing Web Archives as a New Library

  20. 1/13/11 11:56 AM3 On Your Side: DriveSafe.ly CBS Philly News, Sports, Weather, Traffic and the Best of Philadelphia Page 1 of 4http://philadelphia.cbslocal.com/2011/01/12/3-on-your-side-drivesafe-ly/

    E-Print Network [OSTI]

    Salvucci, Dario D.

    and the Best of Philadelphia Page 1 of 4http://philadelphia.cbslocal.com/2011/01/12/3-on: DriveSafe.ly January 12, 2011 3:33 PM Print Share 0 Recommend Texting And Driving PHILADELPHIA, Pa. (CBS in Philadelphia, New Jersey and Delaware. So one company says it has created a hands-free solution to getting e

  1. HST/COS detection of deuterated molecular hydrogen in a damped Ly? system at z = 0.18

    SciTech Connect (OSTI)

    Oliveira, Cristina M.; Sembach, Kenneth R.; Tumlinson, Jason; Thom, Christopher [Space Telescope Science Institute, Baltimore, MD 21218 (United States); O'Meara, John, E-mail: oliveira@stsci.edu [Saint Michael's College, Colchester, VT 05439 (United States)

    2014-03-01

    We report on the detection of deuterated molecular hydrogen, HD, at z = 0.18. HD and H{sub 2} are detected in HST/COS data of a low-metallicity (Z ? 0.07 Z {sub ?}) damped Ly? (DLA) system at z = 0.18562 toward QSO B0120–28, with log N(H I) = 20.50 ± 0.10. Four absorption components are clearly resolved in H{sub 2}, while two components are resolved in HD; the bulk of the molecular hydrogen is associated with the components traced by HD. We find total column densities log N(HD) = 14.82 ± 0.15 and log N(H{sub 2}) = 20.00 ± 0.10. This system has a high molecular fraction, f(H{sub 2}) = 0.39 ± 0.10, and a low HD-to-H{sub 2} ratio, log (HD/2H{sub 2}) = –5.5 ± 0.2 dex. The excitation temperature, T {sub 01} = 65 ± 2 K, in the component containing the bulk of the molecular gas is lower than in other DLAs. These properties are unlike those in other higher redshift DLA systems known to contain HD, but are consistent with what is observed in dense clouds in the Milky Way.

  2. A glimpse at quasar host galaxy far-UV emission using damped Ly?'s as natural coronagraphs

    SciTech Connect (OSTI)

    Cai, Zheng; Fan, Xiaohui; Wang, Ran; McGreer, Ian; Noterdaeme, Pasquier; Finley, Hayley; Petitjean, Patrick; Carithers, Bill; Bian, Fuyan; Miralda-Escudé, Jordi; Pâris, Isabelle; Schneider, Donald P.; Zakamska, Nadia L.; Ge, Jian; Slosar, Anze

    2014-10-01

    In merger-driven models of massive galaxy evolution, the luminous quasar phase is expected to be accompanied by vigorous star formation in quasar host galaxies. In this paper, we use high column density damped Ly? (DLA) systems along quasar sight lines as natural coronagraphs to directly study the far-UV (FUV) radiation from the host galaxies of luminous background quasars. We have stacked the spectra of ?2000 DLA systems (N {sub H} {sub I} > 10{sup 20.6} cm{sup –2}) with a median absorption redshift (z) = 2.6 selected from quasars observed in the SDSS-III Baryon Oscillation Spectroscopic Survey. We detect residual flux in the dark troughs of the composite DLA spectra. The level of this residual flux significantly exceeds systematic errors in the Sloan Digital Sky Survey fiber sky subtraction; furthermore, the residual flux is strongly correlated with the continuum luminosity of the background quasar, while uncorrelated with DLA column density or metallicity. We conclude that the flux could be associated with the average FUV radiation from the background quasar host galaxies (with medium redshift (z) = 3.1) that is not blocked by the intervening DLA. Assuming that all of the detected flux originates from quasar hosts, for the highest quasar luminosity bin ((L) = 2.5 × 10{sup 13} L {sub ?}), the host galaxy has an FUV intensity of 1.5 ± 0.2 × 10{sup 40} erg s{sup –1} Å{sup –1}; this corresponds to an unobscured UV star formation rate of 9 M {sub ?} yr{sup –1}.

  3. A NEW POPULATION OF HIGH-z, DUSTY Ly{alpha} EMITTERS AND BLOBS DISCOVERED BY WISE: FEEDBACK CAUGHT IN THE ACT?

    SciTech Connect (OSTI)

    Bridge, Carrie R. [California Institute of Technology, MS249-17, Pasadena, CA 91125 (United States); Blain, Andrew [Department of Physics and Astronomy, University of Leicester, LE1 7RH Leicester (United Kingdom); Borys, Colin J. K.; Griffith, Roger L.; Tsai, Chao-Wei [Infrared Processing and Analysis Center, California Institute of Technology, MS 100-22, Pasadena, CA 91125 (United States); Petty, Sara; Farrah, Duncan [Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061 (United States); Benford, Dominic [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Eisenhardt, Peter; Stern, Daniel; Wu Jingwen [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 (United States); Jarrett, Tom [Astronomy Department, University of Cape Town, Rondebosch 7701 (South Africa); Lonsdale, Carol [National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903 (United States); Stanford, Spencer A. [Department of Physics, University of California Davis, One Shields Ave., Davis, CA 95616 (United States); Wright, Edward L., E-mail: bridge@astro.caltech.edu [Astronomy Department, University of California Los Angeles, Los Angeles, CA 90095 (United States)

    2013-06-01

    By combining data from the NASA Wide-field Infrared Survey Explorer (WISE) mission with optical spectroscopy from the W. M. Keck telescope, we discover a mid-IR color criterion that yields a 78% success rate in identifying rare, typically radio-quiet, 1.6 {approx}< z {approx}< 4.6 dusty Ly{alpha} emitters (LAEs). Of these, at least 37% have emission extended on scales of 30-100 kpc and are considered Ly{alpha} ''blobs'' (LABs). The objects have a surface density of only {approx}0.1 deg{sup -2}, making them rare enough that they have been largely missed in deep, small area surveys. We measured spectroscopic redshifts for 92 of these galaxies, and find that the LAEs (LABs) have a median redshift of 2.3 (2.5). The WISE photometry coupled with data from Herschel (Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA) reveals that these galaxies are in the Hyper Luminous IR galaxy regime (L{sub IR} {approx}> 10{sup 13}-10{sup 14} L{sub Sun }) and have warm colors. They are typically more luminous and warmer than other dusty, z {approx} 2 populations such as submillimeter-selected galaxies and dust-obscured galaxies. These traits are commonly associated with the dust being illuminated by intense active galactic nucleus activity. We hypothesize that the combination of spatially extended Ly{alpha}, large amounts of warm IR-luminous dust, and rarity (implying a short-lived phase) can be explained if the galaxies are undergoing brief, intense ''feedback'' transforming them from an extreme dusty starburst/QSO into a mature galaxy.

  4. PHYSICAL PROPERTIES OF SPECTROSCOPICALLY CONFIRMED GALAXIES AT z {>=} 6. II. MORPHOLOGY OF THE REST-FRAME UV CONTINUUM AND Ly{alpha} EMISSION

    SciTech Connect (OSTI)

    Jiang Linhua; Windhorst, Rogier A.; Cohen, Seth H.; Mechtley, Matthew; Egami, Eiichi; Fan Xiaohui; Dave, Romeel; Finlator, Kristian; Kashikawa, Nobunari; Ouchi, Masami; Shimasaku, Kazuhiro

    2013-08-20

    We present a detailed structural and morphological study of a large sample of spectroscopically confirmed galaxies at z {>=} 6 using deep Hubble Space Telescope (HST) near-IR broad-band images and Subaru Telescope optical narrow-band images. The galaxy sample consists of 51 Ly{alpha} emitters (LAEs) at z {approx_equal} 5.7, 6.5, and 7.0, and 16 Lyman break galaxies (LBGs) at 5.9 {<=} z {<=} 6.5. These galaxies exhibit a wide range of rest-frame UV continuum morphology in the HST images, from compact features to multiple component systems. The fraction of merging/interacting galaxies reaches 40%-50% at the brightest end of M{sub 1500} {<=} -20.5 mag. The intrinsic half-light radii r{sub hl,in}, after correcting for point-spread function (PSF) broadening, are roughly between r{sub hl,in} {approx_equal} 0.''05 (0.3 kpc) and 0.''3 (1.7 kpc) at M{sub 1500} {<=} -19.5 mag. The median r{sub hl,in} value is 0.''16 ({approx}0.9 kpc). This is consistent with the sizes of bright LAEs and LBGs at z {>=} 6 found in previous studies. In addition, more luminous galaxies tend to be larger and exhibit a weak size-luminosity relation, r{sub hl,in}{proportional_to}L {sup 0.14} at M{sub 1500} {<=} -19.5 mag. The slope of 0.14 is significantly flatter than those in fainter LBG samples. We discuss the morphology of z {>=} 6 galaxies with nonparametric methods, including the concentration, asymmetry, and smoothness system and the Gini and M{sub 20} parameters, and demonstrate their validity through simulations. We search for extended Ly{alpha} emission halos around LAEs at z {approx_equal} 5.7 and 6.5 by stacking a number of narrow-band images. We do not find evidence of extended Ly{alpha} halos predicted by cosmological simulations. Such halos, if they exist, could be weaker than predicted. Finally, we investigate positional misalignment between the UV continuum and Ly{alpha} emissions in LAEs. While the two positions are generally consistent, several merging galaxies show significant positional differences. This is likely caused by a disturbed interstellar medium distribution due to merging activity.

  5. PHYSICAL PROPERTIES OF SPECTROSCOPICALLY CONFIRMED GALAXIES AT z {>=} 6. I. BASIC CHARACTERISTICS OF THE REST-FRAME UV CONTINUUM AND Ly{alpha} EMISSION

    SciTech Connect (OSTI)

    Jiang Linhua; Mechtley, Matthew; Cohen, Seth H.; Windhorst, Rogier A.; Egami, Eiichi; Fan Xiaohui; Dave, Romeel; Finlator, Kristian; Kashikawa, Nobunari; Ouchi, Masami; Shimasaku, Kazuhiro

    2013-08-01

    We present deep Hubble Space Telescope near-IR and Spitzer mid-IR observations of a large sample of spectroscopically confirmed galaxies at z {>=} 6. The sample consists of 51 Ly{alpha} emitters (LAEs) at z {approx_equal} 5.7, 6.5, and 7.0, and 16 Lyman break galaxies (LBGs) at 5.9 {<=} z {<=} 6.5. The near-IR images were mostly obtained with WFC3 in the F125W and F160W bands, and the mid-IR images were obtained with IRAC in the 3.6 {mu}m and 4.5 {mu}m bands. Our galaxies also have deep optical imaging data from Subaru Suprime-Cam. We utilize the multi-band data and secure redshifts to derive their rest-frame UV properties. These galaxies have steep UV-continuum slopes roughly between {beta} {approx_equal} -1.5 and -3.5, with an average value of {beta} {approx_equal} -2.3, slightly steeper than the slopes of LBGs in previous studies. The slope shows little dependence on UV-continuum luminosity except for a few of the brightest galaxies. We find a statistically significant excess of galaxies with slopes around {beta} {approx_equal} -3, suggesting the existence of very young stellar populations with extremely low metallicity and dust content. Our galaxies have moderately strong rest-frame Ly{alpha} equivalent width (EW) in a range of {approx}10 to {approx}200 A. The star formation rates are also moderate, from a few to a few tens of solar masses per year. The LAEs and LBGs in this sample share many common properties, implying that LAEs represent a subset of LBGs with strong Ly{alpha} emission. Finally, the comparison of the UV luminosity functions between LAEs and LBGs suggests that there exists a substantial population of faint galaxies with weak Ly{alpha} emission (EW < 20 A) that could be the dominant contribution to the total ionizing flux at z {>=} 6.

  6. Living SafeLy

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    HigH-voLtage PoWer LineS 1 H igh-voltage power lines can be just as safe as the electrical wiring in our homes - or just as danger- ous. The key is learning to act safely...

  7. Living SafeLy

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResourcelogo and-E CChinaC L S C O N

  8. Intergalactic medium emission observations with the cosmic web imager. II. Discovery of extended, kinematically linked emission around SSA22 Ly? BLOB 2

    SciTech Connect (OSTI)

    Christopher Martin, D.; Chang, Daphne; Matuszewski, Matt; Morrissey, Patrick; Rahman, Shahin; Moore, Anna; Steidel, Charles C.; Matsuda, Yuichi

    2014-05-10

    The intergalactic medium (IGM) is the dominant reservoir of baryons, delineates the large-scale structure of the universe at low to moderate overdensities, and provides gas from which galaxies form and evolve. Simulations of a cold-dark-matter- (CDM-) dominated universe predict that the IGM is distributed in a cosmic web of filaments and that galaxies should form along and at the intersections of these filaments. While observations of QSO absorption lines and the large-scale distribution of galaxies have confirmed the CDM paradigm, the cosmic web of IGM has never been confirmed by direct imaging. Here we report our observation of the Ly? blob 2 (LAB2) in SSA22 with the Cosmic Web Imager (CWI). This is an integral field spectrograph optimized for low surface brightness, extended emission. With 22 hr of total on- and off-source exposure, CWI has revealed that LAB2 has extended Ly? emission that is organized into azimuthal zones consistent with filaments. We perform numerous tests with simulations and the data to secure the robustness of this result, which relies on data with modest signal-to-noise ratios. We have developed a smoothing algorithm that permits visualization of data cube slices along image or spectral image planes. With both raw and smoothed data cubes we demonstrate that the filaments are kinematically associated with LAB2 and display double-peaked profiles characteristic of optically thick Ly? emission. The flux is 10-20 times brighter than expected for the average emission from the IGM but is consistent with boosted fluorescence from a buried QSO or gravitation cooling radiation. Using simple emission models, we infer a baryon mass in the filaments of at least 1-4 × 10{sup 11} M {sub ?}, and the dark halo mass is at least 2 × 10{sup 12} M {sub ?}. The spatial-kinematic morphology is more consistent with inflow from the cosmic web than outflow from LAB2, although an outflow feature maybe present at one azimuth. LAB2 and the surrounding gas have significant and coaligned angular momentum, strengthening the case for their association.

  9. Mapping the Dynamics of a Giant Ly-alpha Halo at z=4.1 with MUSE: The Energetics of a Large Scale AGN-Driven Outflow around a Massive, High-Redshift Galaxy

    E-Print Network [OSTI]

    Swinbank, Mark; Smail, Ian; De Breuck, Carlos; Bacon, Roland; Contini, Thierry; Richard, Johan; Rottgering, Huub; Urritia, Tanya; Venemans, Bram

    2015-01-01

    We present deep MUSE integral-field unit (IFU) spectroscopic observations of the giant (~150 x 80 kpc) Ly-alpha halo around the z=4.1 radio galaxy TNJ J1338-1942. This 9-hr observation maps the two-dimensional kinematics of the Ly-alpha emission across the halo. We identify two HI absorbers which are seen against the Ly-alpha emission, both of which cover the full 150 x 80 kpc extent of the halo and so have covering fractions ~1. The stronger and more blue-shifted absorber (dv~1200 km/s) has dynamics that mirror that of the underlying halo emission and we suggest that this high column material (n(HI) ~ 10^19.4 /cm^2), which is also seen in CIV absorption, represents an out-flowing shell that has been driven by the AGN (or star formation) within the galaxy. The weaker (n(HI)~10^14 /cm^2) and less blue shifted (dv~500 km/s) absorber most likely represents material in the cavity between the out-flowing shell and the Ly-alpha halo. We estimate that the mass in the shell must be of order 10^10 Msol -- a significan...

  10. An HST/COS observation of broad Ly? emission and associated absorption lines of the BL Lacertae object H 2356-309

    SciTech Connect (OSTI)

    Fang, Taotao [Department of Astronomy and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen, Fujian 361005 (China); Danforth, Charles W.; Stocke, John T.; Shull, J. Michael [CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, 389-UCB, Boulder, CO 80309 (United States); Buote, David A. [Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California, Irvine, CA 92697 (United States); Canizares, Claude R. [Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States); Gastaldello, Fabio, E-mail: fangt@xmu.edu.cn [IASF-Milano, INAF, via Bassini 15, Milan I-20133 (Italy)

    2014-11-01

    Weak spectral features in BL Lacertae objects (BL Lacs) often provide a unique opportunity to probe the inner region of this rare type of active galactic nucleus. We present a Hubble Space Telescope/Cosmic Origins Spectrograph observation of the BL Lac H 2356-309. A weak Ly? emission line was detected. This is the fourth detection of a weak Ly? emission feature in the ultraviolet (UV) band in the so-called high-energy peaked BL Lacs, after Stocke et al. Assuming the line-emitting gas is located in the broad line region (BLR) and the ionizing source is the off-axis jet emission, we constrain the Lorentz factor (?) of the relativistic jet to be ?8.1 with a maximum viewing angle of 3.°6. The derived ? is somewhat larger than previous measurements of ? ? 3-5, implying a covering factor of ?3% of the line-emitting gas. Alternatively, the BLR clouds could be optically thin, in which case we constrain the BLR warm gas to be ?10{sup –5} M {sub ?}. We also detected two H I and one O VI absorption lines that are within |?v| < 150 km s{sup –1} of the BL Lac object. The O VI and one of the H I absorbers likely coexist due to their nearly identical velocities. We discuss several ionization models and find a photoionization model where the ionizing photon source is the BL Lac object that can fit the observed ion column densities with reasonable physical parameters. This absorber can either be located in the interstellar medium of the host galaxy or in the BLR.

  11. Radiation damage and associated phase change effect on photodesorption rates from ices—Ly? studies of the surface behavior of CO{sub 2}(ice)

    SciTech Connect (OSTI)

    Yuan, Chunqing; Yates, John T. Jr.

    2014-01-01

    Photodesorption from a crystalline film of CO{sub 2}(ice) at 75 K has been studied using Ly? (10.2 eV) radiation. We combine quantitative mass spectrometric studies of gases evolved and transmission IR studies of species trapped in the ice. Direct CO desorption is observed from the primary CO{sub 2} photodissociation process, which occurs promptly for CO{sub 2} molecules located on the outermost surface of the ice (Process I). As the fluence of Ly? radiation increases to ?5.5 × 10{sup 17} photons cm{sup –2}, extensive damage to the crystalline ice occurs and photo-produced CO molecules from deeper regions (Process II) are found to desorb at a rapidly increasing rate, which becomes two orders of magnitude greater than Process I. It is postulated that deep radiation damage to produce an extensive amorphous phase of CO{sub 2} occurs in the 50 nm ice film and that CO (and CO{sub 2}) diffusive transport is strongly enhanced in the amorphous phase. Photodesorption in Process II is a combination of electronic and thermally activated processes. Radiation damage in crystalline CO{sub 2} ice has been monitored by its effects on the vibrational line shapes of CO{sub 2}(ice). Here the crystalline-to-amorphous phase transition has been correlated with the occurrence of efficient molecular transport over long distances through the amorphous phase of CO{sub 2}(ice). Future studies of the composition of the interstellar region, generated by photodesorption from ice layers on grains, will have to consider the significant effects of radiation damage on photodesorption rates.

  12. Lemma Mining over HOL Light Cezary Kaliszyk and Josef Urban

    E-Print Network [OSTI]

    Kaliszyk, Cezary

    the pool of human-defined main (top-level) theorems in the large libraries with the most useful with its core library and the Flyspeck library. The various evaluation scenarios are defined and discussed Radboud University, Nijmegen Abstract. Large formal mathematical libraries consist of millions of atomic

  13. Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy

    E-Print Network [OSTI]

    U. Seljak; A. Makarov; P. McDonald; S. Anderson; N. Bahcall; J. Brinkmann; S. Burles; R. Cen; M. Doi; J. Gunn; Z. Ivezic; S. Kent; R. Lupton; J. Munn; R. Nichol; J. Ostriker; D. Schlegel; M. Tegmark; D. Van den Berk; D. Weinberg; D. York

    2004-07-19

    We combine the constraints from the recent Ly-alpha forest and bias analysis of the SDSS with previous constraints from SDSS galaxy clustering, the latest supernovae, and WMAP . Combining WMAP and the lya we find for the primordial slope n_s=0.98\\pm 0.02. We see no evidence of running, dn/d\\ln k=-0.003\\pm 0.010, a factor of 3 improvement over previous constraints. We also find no evidence of tensors, renergy constraints in models with a fairly general time dependence of dark energy equation of state, finding Omega_lambda=0.72\\pm 0.02, w(z=0.3)=-0.98^{+0.10}_{-0.12}, the latter changing to w(z=0.3)=-0.92^{+0.09}_{-0.10} if tensors are allowed. We find no evidence for variation of the equation of state with redshift, w(z=1)=-1.03^{+0.21}_{-0.28}. These results rely on the current understanding of the lyaf and other probes, which need to be explored further both observationally and theoretically, but extensive tests reveal no evidence of inconsistency among different data sets used here.

  14. THE FIRST OBSERVATIONS OF LOW-REDSHIFT DAMPED Ly{alpha} SYSTEMS WITH THE COSMIC ORIGINS SPECTROGRAPH: CHEMICAL ABUNDANCES AND AFFILIATED GALAXIES

    SciTech Connect (OSTI)

    Battisti, A. J.; Meiring, J. D.; Tripp, T. M. [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Prochaska, J. X.; Werk, J. K. [Department of Astronomy and Astrophysics, University of California Observatories-Lick Observatory, UC Santa Cruz, CA 95064 (United States); Jenkins, E. B. [Department of Astrophysical Sciences, Princeton University Observatory, Princeton, NJ 08544 (United States); Lehner, N. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Tumlinson, J.; Thom, C. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)

    2012-01-10

    We present Cosmic Origins Spectrograph (COS) measurements of metal abundances in eight 0.083 < z{sub abs} < 0.321 damped Ly{alpha} (DLA) and sub-DLA absorption systems serendipitously discovered in the COS-Halos survey. We find that these systems show a large range in metallicities, with -1.10 < [Z/H] < 0.31, similar to the spread found at higher redshifts. These low-redshift systems on average have subsolar metallicities, but do show a rise in metallicity over cosmic time when compared to higher-redshift systems. We find that the average sub-DLA metallicity is higher than the average DLA metallicity at all redshifts. Nitrogen is underabundant with respect to {alpha}-group elements in all but perhaps one of the absorbers. In some cases, [N/{alpha}] is significantly below the lowest nitrogen measurements in nearby galaxies. Systems for which depletion patterns can be studied show little, if any, depletion, which is characteristic of Milky Way halo-type gas. We also identify affiliated galaxies for three of the sub-DLAs using spectra obtained from a Keck/Low Resolution Imaging Spectrometer (LRIS). None of these sub-DLAs arise in the stellar disks of luminous galaxies; instead, these absorbers may exist in galaxy halos at impact parameters ranging from 38 to 92 kpc. Multiple galaxies are present near two of the sub-DLAs, and galaxy interactions may play a role in the dispersal of the gas. Many of these low-redshift absorbers exhibit simple kinematics, but one sub-DLA has a complicated mix of at least 13 components spread over 150 km s{sup -1}. We find three galaxies near this sub-DLA, which also suggests that galaxy interactions roil the gas. This study reinforces the view that DLAs have a variety of origins, and low-redshift studies are crucial for understanding absorber-galaxy connections.

  15. ---1, I I Paeudo#~&&&&ia * B m -HolWMsholkfirql@Mmtefiatic

    E-Print Network [OSTI]

    ~ t h e ~ t h e m w e r e ~ m t quite dam. WhanIcameverycbm the Zhh e ~ ~ y iutotheahe although recomed as "different".) The small elchlld lnnablUng the Lanistes shell was not P. Ndng8tail

  16. Constraining the dark energy with Ly-alpha forest

    E-Print Network [OSTI]

    Uros Seljak; Rachel Mandelbaum; Patrick McDonald

    2002-12-15

    Statistical properties of gas absorption in high redshift quasars such as power spectrum and bispectrum allow one to determine the evolution of structure over the redshift range 2energy to higher redshift and determine the presence of dark energy if Omega_de>0.1-0.2 at z>2. In combination with low redshift studies one can place useful limits on the time evolution of the equation of state.

  17. Tru-ly Clean - What Does It Mean?

    SciTech Connect (OSTI)

    Hopkins, A.

    2008-07-01

    The evolution and genesis of the definition of transuranic waste (known as TRU) and its application to the cleanup criteria applied to soils contaminated with transuranics, specifically plutonium, has been a matter of discussion at contaminated sites in the United States and elsewhere. Cleanup decisions and the processes that led up to those decisions have varied at several plutonium contaminated sites within the United States and without the pacific region. The sites with radionuclide soil action levels include Bikini and Enewetak Atolls, Republic of the Marshall Islands; Johnston Atoll, Hawaii; the Hanford Site in Washington State; the Nevada Test Site; the Rocky Flats Environmental Technology Site in Colorado; the Chariot Site in north Alaska; and the Maralinga Site in Australia. The soil-action level developed for Rocky Flats by the U.S. Department of Energy, U.S. Environmental Protection Agency, and the Colorado Department of Public Health and Environment for plutonium is one of the higher soil-action levels approved by regulatory agencies that is considered protective for future use of land at a cleanup site. The Republic of the Marshall Islands has adopted a relatively conservative cleanup standard to accommodate the subsistence lifestyle of the islanders, while the Rocky Flats Environmental Technology Site has been transferred to the U.S. Department of the Interior to be used as a fish and wildlife refuge, a land use that resulted in a less conservative plutonium soil cleanup level. (authors)

  18. foldal blogok frumok szavazsok HupWiki /frum friss

    E-Print Network [OSTI]

    Bencsáth, Boldizsár

    IRC A HUP hivatalos IRC csatornája, a #hup.hu Címlap Egy hónapja ismert a Kaminsky-DNS probléma - hol

  19. 1 Adagio q = 70 PETER BIRDMary's Hymn PETER BIRD

    E-Print Network [OSTI]

    Bird, Peter

    - with good things; and the rich He sent emp ty- a way.- E E 93 S. A. T. B. Org. hol pen- His ser vant- Is ra- el- in re mem- brance- of His mer cy;- - hol pen- His ser vant- Is ra- el- in re mem- brance- of His mer cy;- - He hath hol pen- His ser vant- Is ra- el- in His mer - - - He hath hol pen- His ser vant

  20. Mary's Hymn PETER BIRD Adagio q = 70

    E-Print Network [OSTI]

    Bird, Peter

    .- He hath hol pen- His ser vant- Is ra- el- in and the rich He sent emp ty- a way.- He hath hol pen- His ser vant- Is ra- el- in and the rich He sent emp ty- a way.- He hath hol pen- His ser vant mem- brance- of His mer cy;- - As He Is ra- el- in His mer cy.- - - As He hol pen- His ser vant- Is ra

  1. graphic analysis, where hypothesized global-ly synchronous sea level cycles form the

    E-Print Network [OSTI]

    Goodman, Robert M.

    of the popular paradigm of sequence stratigraphy. REFERENCES AND NOTES ___________________________ 1. As opposed, 1988). 5. , Ed., Numerical Dating in Stratigraphy (Wiley- Interscience, New York, 1982), part 1, pp

  2. lY, 1931 Vol. Ill. No. 4 APR 29 1932

    E-Print Network [OSTI]

    York. Editorial Address: Route 4. Hempstead, N. Y. Application for Second Class Entry pending at Post

  3. Incompatibility of a comoving Ly-alpha forest with supernova-Ia luminosity distances

    E-Print Network [OSTI]

    Jens Thomas; Hartmut Schulz

    2001-03-18

    Recently Perlmutter et al. suggested a positive value of Einstein's cosmological constant Lambda on the basis of luminosity distances from type-Ia supernovae. However, Lambda world models had earlier been proposed by Hoell & Priester and Liebscher et al. on the basis of quasar absorption-line data. Employing more general repulsive fluids ("dark energy") encompassing the Lambda component we quantitatively compare both approaches with each other. Fitting the SN-data by a minimum-component model consisting of dark energy + dust yields a closed universe with a large amount of dust exceeding the baryonic content constrained by big-bang nucleosynthesis. The nature of the dark energy is hardly constrained. Only when enforcing a flat universe there is a clear tendency to a dark-energy Lambda fluid and the `canonical' value Omega_M = 0.3 for dust. Conversely, fitting the quasar-data by a minimum-component model yields a sharply defined, slightly closed model with a low dust density ruling out significant pressureless dark matter. The dark-energy component obtains an equation-of-state P = -0.96 epsilon close to that of a Lambda-fluid. Omega_M = 0.3 or a precisely flat spatial geometry are inconsistent with minimum-component models. It is found that quasar and supernova data sets cannot be reconciled with each other via (repulsive ideal fluid+dust+radiation)-world models. Compatibility could be reached by drastic expansion of the parameter space with at least two exotic fluids added to dust and radiation as world constituents. If considering such solutions as far-fetched one has to conclude that the quasar absorption line and the SN-Ia constraints are incompatible.

  4. Constraining the nature of two Ly? emitters detected by ALMA at z = 4.7

    E-Print Network [OSTI]

    Williams, R. J.; Wagg, J.; Maiolino, R.; Foster, C.; Aravena, M.; Wiklind, T.; Carilli, C. L.; McMahon, R. G.; Riechers, D.; Walter, F.

    2014-02-17

    the lack of detection of any highionization emission lines (N V ?1240, Si IV ?1396, C IV ?1549 and He II ?1640) and find that these systems are likely not photoionized by the quasar, leaving in situ star formation as the main powering source...

  5. IGM CONSTRAINTS FROM THE SDSS-III/BOSS DR9 Ly? FOREST TRANSMISSION...

    Office of Scientific and Technical Information (OSTI)

    find that a significant population of partial Lyman-limit systems (LLSs) with a column-density distribution slope of sub pLLS - 2 are required to explain the data at the...

  6. 1202 VOLUME 32 NUMBER 12 DECEMBER 2014 nature biotechnology A n A ly s i s

    E-Print Network [OSTI]

    Kaski, Samuel

    treatment strategy from genomic information is a core goal of precision medicine. Here we focus on predicting drug response based on a cohort of genomic, epigenomic and proteomic profiling data sets measured genomic data into actionable, customized prognosis and treatment regimens for individual patients

  7. Ly{alpha} EMITTERS AT z = 7 IN THE SUBARU/XMM-NEWTON DEEP SURVEY...

    Office of Scientific and Technical Information (OSTI)

    -1. This could be due to evolution of the LAE population at these epochs as a recent galaxy evolution model predicts that the LAE modestly evolves from z 5.7 to 7. However,...

  8. SITES ELIHlNAlED FRCil FUW' ~1WWk'l ffi LY

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and700 GJO-2003-411-TACe -'

  9. IGM CONSTRAINTS FROM THE SDSS-III/BOSS DR9 Lyα FOREST TRANSMISSION

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(Journal Article)lasers(Journal Article) | SciTechinducedcarbonatesConnect i

  10. Ly{alpha} EMITTERS AT z = 7 IN THE SUBARU/XMM-NEWTON DEEP SURVEY FIELD:

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(Journalspectroscopy ofArticle) |management (Patent)

  11. SEARCHING FOR z {approx} 7.7 Ly{alpha} EMITTERS IN THE COSMOS FIELD WITH

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail. (Conference) | SciTech Connect RobustConnect S-waveTechnical Report:

  12. Outer membrane porin M35 of Moraxella catarrhalis mediates susceptibility to aminopenicillins

    E-Print Network [OSTI]

    Jetter, Marion; Heiniger, Nadja; Spaniol, Violeta; Troller, Rolf; Schaller, André; Aebi, Christoph

    2009-01-01

    E, Verhoef J, Fleer A, van Dijk H: Com- plement resistanceCM, Hol C, Fleer A, van Dijk H, van Belkum A: Moraxella

  13. Today's Web bonus >> Thom Browne Fall-Winter collection debut. http://bit.ly/LQx6jo COMING SOON

    E-Print Network [OSTI]

    Sorin, Eric J.

    - cerned about diabetes than can- cer since "we have more of a pro- pensity for it" and "because suggested, the city's neighbor- hood council system or town halls could help parents get involved. He also

  14. ly). Samples were incubated in a buffer-equilibrated humidity chamber at 46C for 90 min, then rinsed

    E-Print Network [OSTI]

    Braun, Douglas C.

    ., J. Bacteriol. 177, 7050 (1995). 20. C. Schleper, G. Puehler, H. P. Klenk, W. Zillig, Int. J. Syst

  15. HST/COS Observations of the Ly alpha Forest toward the BL Lac Object 1ES1553+113

    E-Print Network [OSTI]

    Danforth, Charles W; Stocke, John T; Shull, J Michael; Yao, Yangsen

    2010-01-01

    We present new far-ultraviolet spectra from the Cosmic Origins Spectrograph (HST/COS) of the BL Lac object 1ES1553+113 covering the wavelength range 1135-1795 A. The data show a smooth continuum with a wealth of narrow absorption features arising in the ISM and IGM. These features include 41 Lya absorbers at 00.6 for the strongest component of the absorber complex. Galaxy redshift surveys show a number of massive galaxies at approximately the same redshift as this absorption complex, suggesting that it arises in a large-scale galaxy filament. As one of the brightest extragalactic X-ray and gamma-ray sources, 1ES1553+113 is of great interest to the high-energy astrophysics community. With no intrinsic emission or absorption features, 1ES1553+113 has no direct redshift determination. We use intervening Lya absorbers to place a direct limit on the redshift: z_em>0.395 based on a confirmed Lya+OVI absorber and z_em>0.433 based on a single-line detection of Lya. COS/FUV data are only sensitive to Lya absorbers at ...

  16. Math.Comput.Sci. (2015) 9:522 DOI 10.1007/s11786-014-0182-0 Mathematics in Computer Science

    E-Print Network [OSTI]

    Middeldorp, Aart

    2015-01-01

    Math.Comput.Sci. (2015) 9:5­22 DOI 10.1007/s11786-014-0182-0 Mathematics in Computer Science HOL versions of the Flyspeck, Multivariate Analysis and Complex Analysis libraries. The service runs on a 48 assistants · Large-theory automated reasoning · HOL light Mathematics Subject Classification 68T15 · 68T05

  17. UNIVERSITY VIEW GLENN L. MARTIN HALL

    E-Print Network [OSTI]

    Daume III, Hal

    other parking lots are for use by PERMIT HOL HALL BENJAMIN BUILDING SCHOOL OF PUBLIC HEALTH ARCHITECTURE A.V. WILLIAMS TERRAPIN SOFTBALL COMPLEXVisitors: · Parking is primarily designated within cashier-attended facilities. Lots are marked with on map

  18. Veri?ed Planning by Deductive Synthesis in Intuitionistic Linear Logic 

    E-Print Network [OSTI]

    Dixon, L.; Bundy, Alan; Smaill, A.

    2009-01-01

    We describe a new formalisation in Isabelle/HOL of Intuitionistic Linear Logic and consider the support this provides for constructing plans by proving the achievability of given planning goals. The plans so found are ...

  19. Indistinguishability Obfuscation and UCEs: The Case of Computationally Unpredictable Sources

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    [x] = then if b = 1 then T[x] H.Ev(1 , hk, x) else T[x] $ {0, 1}H.ol() return T[x] Figure 2: Pseudocode

  20. Jules Verne Meister Zacharius

    E-Print Network [OSTI]

    Prodinger, Helmut

    ungeheure Krebsscheren, der Strom schäumte und brauste düster grollend im Schatten sei- ner Last zwischen, als sich auf der Insel, die wie eine hol- ländische Galiote2 in der Mitte des Stroms vor Anker 1 Wege

  1. Influence of Al doping on the critical fields and gap values in magnesium diboride single crystals T. Klein,1,2 L. Lyard,1 J. Marcus,1 C. Marcenat,3 P. Szab,4 Z. Hol'anov,4 P. Samuely,4 B. W. Kang,5 H-J. Kim,5

    E-Print Network [OSTI]

    Boyer, Edmond

    that MgB2 belongs to an origi- nal class of superconductors in which two weakly coupled bands with very the existence of two distinct superconducting gaps. One of the main consequence of this two-band superconduc of the superconducting gaps with Al doping remains controversial. Whereas Gonnelli et al.15 sug- gested that the small

  2. THE END OF HELIUM REIONIZATION AT z {approx_equal} 2.7 INFERRED FROM COSMIC VARIANCE IN HST/COS He II Ly{alpha} ABSORPTION SPECTRA

    SciTech Connect (OSTI)

    Worseck, Gabor; Xavier Prochaska, J. [Department of Astronomy and Astrophysics, UCO/Lick Observatory, University of California, 1156 High Street, Santa Cruz, CA 95064 (United States); McQuinn, Matthew [Department of Astronomy, University of California, 601 Campbell Hall, Berkeley, CA 94720 (United States); Dall'Aglio, Aldo; Wisotzki, Lutz [Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam (Germany); Fechner, Cora; Richter, Philipp [Institut fuer Physik und Astronomie, Universitaet Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam (Germany); Hennawi, Joseph F. [Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, 69117 Heidelberg (Germany); Reimers, Dieter, E-mail: gworseck@ucolick.org [Hamburger Sternwarte, Universitaet Hamburg, Gojenbergsweg 112, 21029 Hamburg (Germany)

    2011-06-01

    We report on the detection of strongly varying intergalactic He II absorption in HST/COS spectra of two z{sub em} {approx_equal} 3 quasars. From our homogeneous analysis of the He II absorption in these and three archival sightlines, we find a marked increase in the mean He II effective optical depth from <{tau}{sub eff},He{sub ii}>{approx_equal}1 at z {approx_equal} 2.3 to <{tau}{sub eff},He{sub ii}>{approx}>5 at z {approx_equal} 3.2, but with a large scatter of 2{approx}<{tau}{sub eff},He{sub ii}{approx}<5 at 2.7 < z < 3 on scales of {approx}10 proper Mpc. This scatter is primarily due to fluctuations in the He II fraction and the He II-ionizing background, rather than density variations that are probed by the coeval H I forest. Semianalytic models of He II absorption require a strong decrease in the He II-ionizing background to explain the strong increase of the absorption at z {approx}> 2.7, probably indicating He II reionization was incomplete at z{sub reion} {approx}> 2.7. Likewise, recent three-dimensional numerical simulations of He II reionization qualitatively agree with the observed trend only if He II reionization completes at z{sub reion} {approx_equal} 2.7 or even below, as suggested by a large {tau}{sub eff},He{sub ii}{approx}>3 in two of our five sightlines at z < 2.8. By doubling the sample size at 2.7 {approx}< z {approx}< 3, our newly discovered He II sightlines for the first time probe the diversity of the second epoch of reionization when helium became fully ionized.

  3. AN HST/COS OBSERVATION OF BROAD Ly? EMISSION AND ASSOCIATED ABSORPTION LINES OF THE BL LACERTAE OBJECT H 2356-309

    E-Print Network [OSTI]

    Fang, Taotao

    Weak spectral features in BL Lacertae objects (BL Lacs) often provide a unique opportunity to probe the inner region of this rare type of active galactic nucleus. We present a Hubble Space Telescope/Cosmic Origins Spectrograph ...

  4. P.P. Chen and L.Y. Wong (Eds.): ACM-L 2006, LNCS 4512, pp. 194205, 2007. Springer-Verlag Berlin Heidelberg 2007

    E-Print Network [OSTI]

    Libre de Bruxelles, Université

    . Other directions emerge that slowly influence progress in DBMS development. Supporting the description of spatial features has recently become part of the functionality of most recent DBMS, although to a still

  5. Courses: History (HIST) Page 325Sonoma State University 2015-2016 Catalog HiSt 335 eArLy CHinA to 1500 (4)

    E-Print Network [OSTI]

    Ravikumar, B.

    ; and modernization in Brazil. The role of the United States in Latin America and modern Latin American art, Chinese, Blacks, and the indigenous peoples have positioned themselves in Brazil, Argen- tina, Peru

  6. A40369 REV A SINGLE-PARAMETER

    E-Print Network [OSTI]

    Kay, Mark A.

    agreements. The defective product should be returned promptly, proper- ly packaged and postage prepaid. Loss

  7. >> Business, E1 >> Classifieds, F1 >> Lotteries, A2 >> Movies, D5 >> Obituaries, B4 >> Opinion, B8 >> Outdoors, C14 >> TV, D4 $2 ($2.50 in some areas) SUNDAY, MARCH 15, 2015 I RAIN LIKELY L 54 M 42 I WWW.SPOKESMAN.COM

    E-Print Network [OSTI]

    . Baldor Associated Press See AFGHANISTAN, A11 JERUSALEM ­ Deep- ly divided and foul of mood, Israelis

  8. Proceedings of the 19th Central Hardwood Forest Conference GTR-NRS-P-142 271 CoMPARISoNS oF SeDIMeNT LoSSeS FRoM A NewLy

    E-Print Network [OSTI]

    concerns about the social, economic, and environmental effects of drilling and hydraulic fracturing have the new wells, pipeline construction has simultaneously been expanding. For example, 1,854 km of pipeline extensive impacts than those associated with drill pad development; however, there has been little research

  9. ANALYTICAL CURRENTS J A N U A R Y 1 , 2 0 0 5 / A N A LY T I C A L C H E M I S T R Y 7 A

    E-Print Network [OSTI]

    in a series of steps. In the first step, conical pores were etched into a 12-µm- thick polycarbonate membrane-tube conductivity cell to measure current­voltage curves. The in- vestigators studied the rectification of the ion the conductance of ions as a function of voltage, so that ions flow better in one direction than in the other

  10. Timothy E John Dallas Department of Electrical and Computer Engineering

    E-Print Network [OSTI]

    Gelfond, Michael

    . of Microelectromechanical Systems 19, pp. 632-639 (2010). 9. "Design and Analysis of a Dual-Mode MEMS Micromirror," X. Xiong (Accepted, Journal of Electrostatics, 7/2012). 2. "The 18mm 2 Laboratory: Teaching MEMS Development-micromachined MEMS," Ashwin P. Vijayasai, Ganapathy Sivakumar, Matthew Mulsow, Shelby Lacouture, Alex Holness

  11. Hierarchical Verification of the Implementation of The IEEE754 TableDriven FloatingPoint Exponential

    E-Print Network [OSTI]

    Tahar, Sofiène

    verification system allows its use for the verification task over the whole design path of the circuitHierarchical Verification of the Implementation of The IEEE­754 Table­Driven Floating­Point Exponential Function using HOL Amr T. Abdel­Hamid 1 , Sofiâ?? ene Tahar 1 , John Harrison 2 1 Electrical

  12. Assessing the frictional and baroclinic contributions to stratified wake formation: a parameter space study 

    E-Print Network [OSTI]

    Smith, Jamie Brooke

    2006-08-16

    The baroclinic and surface-frictional contributions to stratified wake formation are considered as a function of the non-dimensional height ( = Nho/U) and aspect-ratio ( = ho/L) of the barrier. Numerical simulations are computed for a wide range...

  13. Released on receipt but intended f o r use

    E-Print Network [OSTI]

    &-Hol*tein earth walls are thrown up and shrubbery is planted upon them, since forest trees cannot be made t o grow- protected portions of the groves AS i n those sheltered by the windbreak. p s e r i e s of anemometers

  14. Time Repor*ng Codes 3/1/15 TRC Description TRC Description TRC Description

    E-Print Network [OSTI]

    Barrash, Warren

    HHS Holiday Pay - Temp - Salary OTA Overtime Accrued 1.5 CBK Call Back Pay HLS Holiday Pay - Reg-Salary.0 CPT Comp Time Taken - Reg HOH Holiday Pay - Temp-Hourly REG Regular - Hourly/Salary DNO Organ Donation - Temp - Salary HOL Holiday Pay - Reg-Hourly RET Regular - Temp-Hourly/Salary DNR Organ Donation - Reg

  15. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 50, NO. 1, JANUARY 2001 125 The Application of Neural Networks to Fuel

    E-Print Network [OSTI]

    Stengel, Robert F.

    , IEEE Abstract--Passenger vehicles fueled by hydrocarbons or alco- hols and powered by proton exchange than, but retains the reliability and ease of use of, conventional industrial controllers. The proposed in parallel with a conventional proportional-integral-derivative (PID) controller. A computer simulation

  16. FREE ACTIVITIES UNIVERSITY OF OXFORD MUSEUMS & COLLECTIONS

    E-Print Network [OSTI]

    Wallace, Mark

    ,Sun and Bank Hols 11am­4pm FREE ENTRY FOR CHILDREN FREE ENTRY FREE ENTRY FOR CHILDREN PITT RIVERS MUSEUM PITT.mhs.ox.ac.uk 01865 277280 OPEN Tuesday ­ Sunday 12 ­ 5pm FREE ENTRY FREE ENTRY FREE ENTRY FREE ENTRY Brilliant bugs for all · 10am-4pm Subject to availability Available from Information Point Every Sunday FAMILY FRIENDLY

  17. Int. J. , Vol. x, No. x, xxxx 1 Modelling and Analysis of Service Parts Logistics Systems

    E-Print Network [OSTI]

    Rossetti, Manuel D.

    Int. J. , Vol. x, No. x, xxxx 1 Modelling and Analysis of Service Parts Logistics Systems Fernando, the behaviour of the service parts logistics system (SPLS) is approximated with a modified M/G/1 HOL queuing policy. Keywords: Service parts logistics, optimisation, genetic algorithms, M/G/1 queuing model

  18. STATE RESTORATION IN DISTRIBUTED SYSTEMS Philip M. MERLIN

    E-Print Network [OSTI]

    Newcastle upon Tyne, University of

    Technion - Israel institute of Technology Haifa, Israel Brian RANDELL Computing Laboratory The University to continue normal processing,, Such backward error recovery © 1978 IEEE. Personal use of this material;2 graphs are similar to the Occurrence Nets (also called Causal Nets) described in [HOL68, PET76, PET77

  19. Theory of Genetic Algorithms ---extended abstract---

    E-Print Network [OSTI]

    de Graaf, Jeannette

    , Joost N. Kok and Walter A. Kosters Leiden University, Department of Computer Science P.O. Box 9512, 2300 some methods for examining the fundamental properties of genetic algorithms ([Hol75, Jon75, Gol89, Mit computation. For a good overview of evolutionary computation one may consult the Handbook of Evolutionary

  20. The Role of Star-forming Galaxies in Cosmic Reionization

    E-Print Network [OSTI]

    Rehagen, Robin Eileen Mostardi

    2015-01-01

    specific ionizing emissivity at z = 2.85, indicating (withfraction and comoving LyC emissivity at z = 2.85. This worka revised value for the LyC emissivity at z = 2.85, based on

  1. List of papers produced by CLICS-II in year 2 This document lists all papers written by CLICS-II members, which were cited in*

    E-Print Network [OSTI]

    Moggi, Eugenio

    anonymous FTP, then its location is given immediate* *ly below its bibli- ographic entry (in the format

  2. Spring 2015 Henderson Hall Education and Career Fair

    Office of Energy Efficiency and Renewable Energy (EERE)

    Location: Smith Gym, Henderson Hall, Arlington, VAPOC: DOECorporateRecruitment@hq.doe.govWebsite: http://bit.ly/1FRIJOF

  3. Dogwood LaneQuarters Amphitheater

    E-Print Network [OSTI]

    Lawrence, Deborah

    (Cedrus libani) Once used in shipbuilding and embalming. Has been cut extensive- ly in its native Turkey

  4. Crinoids of the Francis Shale (Missourian) of Oklahoma

    E-Print Network [OSTI]

    Strimple, H. L.; Moore, R. C.

    1971-11-30

    the possibility of collecting more speci- mens at the brick pit just south of Ada, Pontotoc County, Oklahoma, and was joined by ALLEN GRAFFHAM and one of us (STRimpLE) in excavat- ing a large colony or pocket of crinoids. A few rather large concretions..., Missourian, Pontotoc Coun- ty, Oklahoma; T. progressus STRIMP LE, 1952, Barnsdall Formation, Missourian, Osage County, Oklahoma; T. associatus STRIMP LE, 1952, Oolo- gah Limestone, Desmoinesian, Tulsa County, Oklahoma; T. coniformis STRIMP LE, 1961, Hol- deny...

  5. Ammonia fiber explosion (AFEX) pretreatment of municipal solid waste components 

    E-Print Network [OSTI]

    Lundeen, Joseph Eric

    1991-01-01

    AMMONIA FIBER EXPLOSION (AFEX) PRETREATMENT OF MUNICIPAL SOLID WASTE COMPONENTS A Thesis by JOSEPH ERIC LUNDEEN Submitted to the Oflice of Graduate Studies of Texas A&M University in partial fulfdlment of the requirements for the degree... of MASTER OF SCIENCE December 1991 Major Subject: Chemical Engineering AMMONIA FIBER EXPLOSION (AFEX) PRETREATMENT OF MUNICIPAL SOLID WASTE COMPONENTS A Thesis Joseph Eric Lundeen Approved as to style and content by: Mark Hol pie ( tte R. W...

  6. Interfacial assembly of dendritic microcapsules with host-guest chemistry

    E-Print Network [OSTI]

    Zheng, Yu; Yu, Ziyi; Parker, Richard M.; Wu, Yuchao; Abell, Chris; Scherman, Oren A.

    2014-12-16

    subsequent etching under relatively harsh conditions to obtain a hol- low structure, lowering encapsulation and loading effi- ciencies. Droplets-in-droplet based double or multiple emulsion strategies28,29, although powerful, depend on ingenious microfluidic... ,34, micelles35, hydro- gels36,37, colloids38 and more recently by our group, mi- crocapsules39. In this supramolecular system, cucur- bit[8]uril (CB[8]) was exploited to crosslink a naphthol- modified poly(acrylamide) copolymer and methyl viologen...

  7. Composition and Digestibility of the Chloroform Extract of Hays and Fodders. 

    E-Print Network [OSTI]

    Fraps, G. S.; Rather, J. B.

    1913-01-01

    of Chloroform Extract and of Ether Extract. Period. 3 12 9 6 17 16 4 10 15 11 5 1413 7 18 2 Description. Alfalfa hay ..................... Bermuda hay ................. Buffalo grass hay.......... Burr clover..................... Corn...-73? 4665 Excrement, rice straw..................................... 115.0 72-73? The acetyl numbers of the crystals are near to that of myricyl alco? hol, which is 116.4. This corresponds to the crystals separated from the ether extract of burr clover...

  8. Yeki bud, yeki nabud: Essays on the Archaeoogy of Iran in Honor of William M. Sumner

    E-Print Network [OSTI]

    2003-01-01

    Henry T. Wright and Elizabeth Caner RH—9 6.13 l.arg(*1'lliiqht and Elizabeth Caner covered l)y our air photographs

  9. 19/02/2010 17:13As if by design... Science on the Fringe Page 1 of 3http://scientificfringe.wordpress.com/2010/02/15/as-if-by-design/#comments

    E-Print Network [OSTI]

    Reece, Sarah

    & Evolution (2010) vol. 25 (3) pp. 131-131 http://bit.ly/9wEo6k I thought about The Vagina Monologues

  10. Pittsburgh Forum on Veteran Employment/Career Fair

    Broader source: Energy.gov [DOE]

    Location: Heinz Field, 100 Art Rooney Avenue, Pittsburgh, PAPOC:  Donna FriendWebsite: http://bit.ly/1q90WNk

  11. Black Engineering of the Year Awards and STEM Conference Career Fair

    Broader source: Energy.gov [DOE]

    Location:  Washington Marriott Wardman Park, 2660 Woodley Road, NW, Washington, DC 20008Website Link:  http://bit.ly/1CbVvraPOC:  Dameone Ferguson (NNSA)

  12. Central Washington University: 2014 Engineering Technologies, Safety & Construction Fair

    Broader source: Energy.gov [DOE]

    Location: 400 E. University Way Ellensburg, WA 98926, SURC BallroomPOC: Heather BainWebsite: http://bit.ly/1pgOpN7

  13. VTKADIOSSCHEMAREADER

    Energy Science and Technology Software Center (OSTI)

    003354WKSTN00 ADIOS Schema reader for VTK  https://www.dropbox.com/s/ly94k82xdd41hyi/AdiosSchemaReader-master.zip 

  14. Geophys. J. R. astr. SOC.(1984) 79, 893-910 Deep Schlumberger soundingand the crustal

    E-Print Network [OSTI]

    Constable, Steve

    1984-01-01

    & Lilley 1Y74; Cough, McElhinny & Lilley 1Y74: Lilley 1976;White & Polatajko lY78; White & Hopgood 1979

  15. Impacts of Delayed Drawdown on Aquatic Biota and Water Quality in Seasonally Managed Wetlands of the Grasslands Ecological Area

    E-Print Network [OSTI]

    Quinn, Nigel W.T.

    2009-01-01

    L) Turbidity (NTU) Solar Radiation (W/m 2 ) Label Date Ave.mg/L-P) Date Phosphate (mg/L-P) Solar Radiation (Ly/day)

  16. Under consideration for publication in J. Fluid Mech. 1 Linear instability, nonlinear instability, and

    E-Print Network [OSTI]

    Boyer, Edmond

    the parameter set (m, Re, S) = (30, 300, 0.3). Further geometric parameters are (Lx, Ly, Lz) = (1.58, 1, 1

  17. 4U1626-67: A PROGRADE SPINNING X-RAY PULSAR IN A 2500 s BINARY SYSTEM

    E-Print Network [OSTI]

    Middleditch, J.

    2013-01-01

    motion and would ord ly reprocess the X-ray pulses into thedisk and thus will not reprocess the "bright spotvr normal

  18. Careers & the disABLED Career Expo

    Broader source: Energy.gov [DOE]

    Location: Ronald Reagan Bldg, Washington, DCAttendees:  Terri Sosa (Science)POC:  Donna FriendWebsite: http://bit.ly/1tlHhNr

  19. Acclimation of Russian forests to recent changes A N D R E I L A P E N I S *, A N AT O LY S H V I D E N K O w , D M I T R Y S H E PA S C H E N K O z,

    E-Print Network [OSTI]

    Lapenas, Andrei G.

    Mytishi, Moscow District, Russia Abstract Assessments made over the past few decades have suggested. The shift has been largest within the European Russia, where summer temperatures and precipitation have to the Forest Steppe on the west side of the Ural Mountains and along the zone of the Southern Taiga in Siberia

  20. J A N U A R Y 1 , 2 0 0 1 / A N A LY T I C A L C H E M I S T R Y 3 9 A p ro d u c t re v i e w

    E-Print Network [OSTI]

    Kwak, Juhyoun

    -probe microscopy imaging has led to various interrelated instruments. James P. Smith Scanning-probe microscopy (SPM- chemical (EC) measurements with SPM imaging. SPM was developed during the 1980s, and some of the first applications of this new technology involved EC measure- ment. (For a product review on SPM, see Anal. Chem

  1. 11 Dupont Circle NW, Suite 800, Washington, DC 20036 | 202.588.5180 Fax 202.588.5185 | www.nwlc.org C Y B E R B U L LY I N G A N D S E X U A L H A R A S S M E N T FA C T S H E E T

    E-Print Network [OSTI]

    Nickrent, Daniel L.

    -sharing sites like YouTube, the creation of Facebook or MySpace pages that humiliate other students or partners. Conduct too often dismissed as just "boys being boys" or "mean girls," when severe, can actually that have actual knowledge of harassment and are deliberately indifferent to it may be held liable

  2. DNS of complex fuel combustion with detailed chemistry: physical insight and mean reaction rate modelling

    E-Print Network [OSTI]

    Nikolaou, Z. M.; Swaminathan, N.

    2015-01-01

    The computational domain has Lx = 14 mm and Ly = Lz = 7 mm with corresponding number of grid points Nx = 768 and Ny = Nz = 384 for case A. These values for case B are Lx = 21 mm, Ly = Lz = 7 mm, Nx = 1632 10 and Ny = Nz = 544. The numerical resolution is dictated...

  3. Khesbn no. 149 - Spring 2007 - Journal

    E-Print Network [OSTI]

    Admin, LAYCC

    2007-01-01

    ryrrf,.t rybrse:XbXu X - 0"l'l nx r1$1l? - Dl'Dl5t6r1 "lltrro'. 'tuuxs yu'rgllpr) nx i:*pi*ulrii:rru>rp lyDll fN .ly:Eyl ? '? ff lltly vtrnrrn nx uDNVJrb orD D'tt Fryn ybr /? t{

  4. Yeast Breads: Made at Home. 

    E-Print Network [OSTI]

    Reasonover, Frances

    1971-01-01

    ~rc,~wd 1 pound loaf pans. Let rise until doubled. pit ,it 400? I;. about 50 minutes. When loaves shrink .nm s~des of pan, are a golden brown and give a hol- 1~ sound when tapped, the bread is done. As soon I \\ lalres are taken from the oven, turn... wanted, remove dough from refrigerator and punch down. Mold at once in any desired shape. Or, if preferred, let dough stand in warm room an hour before molding. Place in greased pans and let rise until doubled in size, about 1 hour. Bake at 425' F...

  5. An economic evaluation of selected tenure arrangements for a representative farm in the northern high plains of Texas 

    E-Print Network [OSTI]

    Harwell, R. Lynn

    1970-01-01

    'frixfxttee) ~ ~~yg/J Jeff:axxy 1970 ABSTRACT An Economic Evaluation of Selected Tenure Arrangements For A Representative Farm in the Northern Sigh Plains of Texas. (January 1970) Richard Lynn Sarwell; B. B. S. , The University of Texas Directed by: Dr. J. S... thar three-fourths of the annual noisture falls during the growing season [27]. LLANO M E'yg ~VI P@ I CO HARFvvv EHERSAV tiooRF HolCHINsoN Study Area vs% Figure 1. Distribution of Hardlands Soils, Texas bligh Pla111S Souro: [57 J !!ind !mi...

  6. Commercial Feeding Stuffs, September 1, 1924 to August 31, 1925. 

    E-Print Network [OSTI]

    Youngblood, B. (Bonney); Fuller, F. D. (Frederick Driggs); Pearce, S. D.

    1925-01-01

    T. 0 WALTON, President STATION STAFFf- -'r ADMINISTRATION: B YOUNGBLOOD M S Ph. D Director A: B. CONNER, M. s.. 't'ice-~i;lctor R. E. KARPER, B. S., Asszstani Dlrector A S WARE Secretary W. H. HOL~MANN Chief Clerk M. P HOLLEMAN 'JR Assistant... A Chief H.'NESS, M. s.', ~krry'~reeder RANGE ANIMAL HUSBANDRY: J. M. JONES, 4. M., Chief; Sheep and Goat Invest[gatrons J. L. LUSH? Ph. D., Animal Husbandman; Breedzng Investzgatzons J. J. HUNT, Wool Grader ENTOMOLOGY: F. L. THOMAS? Ph. D...

  7. Breed and environmental factors influencing the performance of crossbred cattle for milk production in a tropical environment 

    E-Print Network [OSTI]

    Contreras Duran, Ricardo Eligio

    1977-01-01

    'ber on lactation performance. Plain dairy- ing characterist'c= of these farms are: most of the cows are Bos . indicos-Bos taurus crossbreds, , cows a!0 '1~cd-m. Ikcd and no concentrate is fed to the animals. The experimental material consisted of 1888 lactation... records from Hol. tein, Brown Hwiss, Criollo, Zebu and Brahman crossbred cows. 1'dil k yield was estimated from monthly weights. Calvir!g number, lactation length, calving interval and previous dry pe iod were also recorded. Analyses we e conducted...

  8. Magnetic Quadrupole Decay of (1s2s2p) 4p05/2-(1s)22s2se1/2 Transition of Lithium Isoelectronic Sequence 

    E-Print Network [OSTI]

    Onello, J. S.; Ford, A. Lewis.

    1975-01-01

    of electron decay-in-flight spectra from autoionizing states of the lithium s eries' and x-ray emission from foil -excited beams' have prompted a systematic study of the magnetic quadrupole decay rates for the sequence by means of a nuclear-charge-expansion... the expansion eigenval- ues of the lithium sequence from I.iI through ArXVI and compares them to the variational estimates of HolOien and Geltman. ' For 0 VI the energy from the Z expansion differs from the variational energy obtained with the 41-term...

  9. Hammering towards QED

    E-Print Network [OSTI]

    Blanchette, Jasmin C.; Kaliszyk, Cezary; Paulson, Lawrence C.; Urban, Josef

    2015-01-01

    algorithms have led to visible suc- cess. Fully automated procedures can prove 40% of the theorems in the Mizar math library, 47% of the HOL Light/Flyspeck libraries, with com- parable rates in Isabelle. These automation rates represent an enormous savings... the automatic proof of the Robbins conjecture by William McCune’s EQP system in 1996 [91]. ATPs have solved some open equational algebraic problems—for example, in quasigroup and loop theory [109]—finding proofs consisting of thousands of inferences. Linking...

  10. Heating and cooling of the intergalactic medium by resonance photons

    E-Print Network [OSTI]

    Leonid Chuzhoy; Paul R. Shapiro

    2007-01-27

    During the epoch of reionization a large number of photons were produced with frequencies below the hydrogen Lyman limit. After redshifting into the closest resonance, these photons underwent multiple scatterings with atoms. We examine the effect of these scatterings on the temperature of the neutral intergalactic medium (IGM). Continuum photons, emitted between the Ly_alpha and Ly_gamma frequencies, heat the gas after being redshifted into the H Ly_alpha or D Ly_beta resonance. By contrast, photons emitted between the Ly_gamma and Ly-limit frequencies, produce effective cooling of the gas. Prior to reionization, the equilibrium temperature of ~100 K for hydrogen and helium atoms is set by these two competing processes. At the same time, Ly_beta resonance photons thermally decouple deuterium from other species, raising its temperature as high as 10^4 K. Our results have important consequences for the cosmic 21-cm background and the entropy floor of the early IGM which can affect star formation and reionization.

  11. Parking Infrastructure and the Environment

    E-Print Network [OSTI]

    Chester, Mikhail; Horvath, Aprad; Madanat, Samer

    2011-01-01

    understand the full cost of parking. ? Nicholas Santero andLY L I T T L E A B O U T how parking infrastructure affectsBecause abundant free parking encourages solo driving and

  12. The grazing of Euphausia superba Dana on natural phytoplankton populations 

    E-Print Network [OSTI]

    Meyer, Michael August

    1981-01-01

    , experiment VIII used two monocul- tures of phytoplankton. These cultures, Chaetoceros sp. and predominant- ly Nitzschia curta (Van Heurck) Hasle were isolated by serial dilution in "f/2" media developed by Guillard and Ryther (1962) as reported by Mc- i...

  13. Oklahoma – Sexual Orientation and Gender Identity Law and Documentation of Discrimination

    E-Print Network [OSTI]

    Sears, Brad

    2009-01-01

    Equality, FAQ: LGBT in Tulsa, http://www.okeq.org/faq.cfm (6, 2009) (summarizing City of Tulsa employment policies);bit.ly/RdhKC (noting that Tulsa Community College amended

  14. MATERIALS AND MOLECULAR RESEARCH DIVISION. ANNUAL REPORT 1980

    E-Print Network [OSTI]

    Searcy, Alan W.

    2010-01-01

    DMS Meeting on Coal Structure and Properties, Gatlinburg,on the Properties and Performance of Materials in the Coalof coal. This i s particular­ ly true of properties and

  15. Proapoptotic Bim regulates antigen-specific NK cell contraction and the generation of the memory NK cell pool after cytomegalovirus infection

    E-Print Network [OSTI]

    Min-Oo, G; Bezman, NA; Madera, S; Sun, JC; Lanier, LL; Lanier, LL

    2014-01-01

    responders from the memory pool. PLoS ONE. 8:e67363. http://us for diving into the memory pool? Immunol. Rev. 236:54–67.and Lanier, 2011). A small pool of Ly49H + NK cells persists

  16. ORIGINAL PAPER When good neighbors don't need fences: temporal landscape

    E-Print Network [OSTI]

    Alberts, Susan C

    ) collars to synchronous- ly record the hourly locations of five baboon social groups for 900 days, and we ranges and territories can apply to both solitary and group-living species, but in the latter case

  17. Mass Adult Education: A Necessary Element in the Development of Socialism in Tanzania

    E-Print Network [OSTI]

    Hall, Budd L.

    1972-01-01

    on aduLt education in Tanzania. He is currentLy head of theof Adul-t Educators in Tanzania. A paper delivered at theAduLt Education in Tanzania-- A Handbook on Approaches,

  18. Fish Oil Industry in South America

    E-Print Network [OSTI]

    been operating for many years experience has made these operations the more advanced industrial- ly oil, obtained generally by centrifugation of the press liquor in the processing of fish meal, amounted

  19. HBCU College Festival sponsored by Alfred Street Baptist Church

    Broader source: Energy.gov [DOE]

    Location: T.C. Williams High School, 3330 King St, Alexandria, VA 22302Attendees: Rauland Sharp (HC) and Dameone Ferguson (NNSA)POC: Chester Scott Website: http://bit.ly/1BARRqp

  20. The Cold War and American Education

    E-Print Network [OSTI]

    Marden, David L.

    1975-10-01

    methods. When Kansas legislators discussed the possibility of a legis­ lative investigation of subversive tendencies at the Univer­ sity of Kansas, the University's AAUP chapter reacted swift­ ly with a public resolution urging the legislators to furnish...

  1. --No Title--

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    http:ow.ly53DpX RICHLAND, Wash. - Workers at the Hanford Site have surpassed goals for drilling wells to detect and remove contamination from groundwater. The groundwater was...

  2. 2013 Progress Report -- DOE Joint Genome Institute None 59 BASIC...

    Office of Scientific and Technical Information (OSTI)

    bit.lyJGI-Vision for the Institute. A central focus of this Strategic Vision is to bridge the gap between sequenced genomes and an understanding of biological functions at the...

  3. TITLE AUTHORS SUBJECT SUBJECT RELATED DESCRIPTION PUBLISHER AVAILABILI...

    Office of Scientific and Technical Information (OSTI)

    bit ly JGI Vision for the Institute A central focus of this Strategic Vision is to bridge the gap between sequenced genomes and an understanding of biological functions at the...

  4. "Title","Creator/Author","Publication Date","OSTI Identifier...

    Office of Scientific and Technical Information (OSTI)

    bit.lyJGI-Vision for the Institute. A central focus of this Strategic Vision is to bridge the gap between sequenced genomes and an understanding of biological functions at the...

  5. Social Media | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Timeline Photos from Facebook More Twitter @argonne 4 hours ago Missed "What is the Brain Initiative?" Fear not, science-y goodness awaits you here @C2ST - http:bit.ly...

  6. Page 1 MA 262 Practice for Exam I 1. If y is the solution to the ...

    E-Print Network [OSTI]

    Page 4 ... @E_?'?-Hioo '? Ve t+1@. »gig-.J CJ, d(LY-2, = mfp.- £30 aff L. 8. The equilibrium solution(s) to the differential equation. ?-?=y(y-1)(y-2l. EIB.

  7. Refiguring the sketch : the Nari Gandhi cartographic

    E-Print Network [OSTI]

    Jalia, Aftab Amirali

    2008-01-01

    Nariman Dossabhai Gandhi, one of the earLiest proponents of organic architecture Taliesin and heaviLy influenced by Frank LLoyd Wright's teachings on the same subj personal understanding of the term: organic, extending it ...

  8. An evaluation of the microbiological methods for the determination of glycine 

    E-Print Network [OSTI]

    Kulkarni, Maharudra Venkatrao

    1957-01-01

    to aucoclaving. The sterilised tubes wsxk cooled, inoculated as described above, and incubated for Tf hours at ly . The grovxth response was determined by wuasuring tbe lactic acid produced st the cerninacion of the incubation period. The lactic acid uns...

  9. QUASARS PROBING QUASARS. VI. EXCESS H I ABSORPTION WITHIN ONE PROPER Mpc OF z ~ 2 QUASARS

    E-Print Network [OSTI]

    Prochaska, J. Xavier

    With close pairs of quasars at different redshifts, a background quasar sightline can be used to study a foreground quasar's environment in absorption. We use a sample of 650 projected quasar pairs to study the H I Ly? ...

  10. 1. SOME RESULTS FROM A FIELD INVESTIGATION OF THERMO-MECHANICAL LOADING OF A ROCKMASS WHEN HEATERS ARE EMPLACED IN THE ROCK. II. THE APPLICATION OF FIELD DATA FROM HEATER EXPERIMENTS CONDUCTED AT STRIPA, SWEDEN TO PARAMETERS FOR REPOSITORY DESIGN

    E-Print Network [OSTI]

    Hood, M.

    2010-01-01

    Disposal of High Level Radioactive Waste: Initial Assessment of Thermal Stress Field. AERE reportDisposal of Radioactive Wastes, Otaniemi, Finland, July 2-6, ly79. This report

  11. Veterans Employment Forum

    Broader source: Energy.gov [DOE]

    Location: 614 SW 11th Avenue, Portland, OR 97205, 2nd Floor Library RoomPOC: Heather BainWebsite: http://bit.ly/1t6XjaO

  12. Naval Support Activity (NSA) in Bethesda Employment Education Fair

    Broader source: Energy.gov [DOE]

    Location: NSA Bethesda Fitness Center (Gymnasium, Bldg 17), 8901 Wisconsin Ave., Bethesda, MD 20889Attendees: Donna Friend (HC) and Rauland Sharp (HC)POC: Donna FriendWebsite: http://bit.ly/1yTjTNu

  13. Supplementary: Learning for Structured Prediction Using Approximate Subgradient Descent with Working Sets

    E-Print Network [OSTI]

    Fua, Pascal

    that minimizes the empirical objective function: L(w) = N n=1 l(Y n , Y , w) + 1 2C ||w|| 2 . (1) At each on the training example (Xn , Y n ), yielding: f(w, n) = l(Y n , Y , w) + 1 2C ||w|| 2 . (2) We consider the case analyze the convergence properties of Algorithm 1. Recall that our goal is to find the parameter vector w

  14. Non-LTE Analysis of Lyman-Line Observations of a Filament with SUMER

    E-Print Network [OSTI]

    P. Schwartz; B. Schmieder; P. Heinzel

    2007-04-26

    We present non-LTE diagnostics of the filament observed by SOHO/SUMER on May 27, 2005 in the whole Lyman series. The filament was situated close to the disk center. The Ly_alpha observations were carried out with normal voltage of detector A. The slit was placed at the central part of the detector -- outside the Ly_alpha attenuator. Therefore, the observed profiles of this line could be calibrated reliably.

  15. The Temporal Behaviour of Lyman-alpha Emission During Solar Flares From SDO/EVE

    E-Print Network [OSTI]

    Milligan, Ryan O

    2015-01-01

    Despite being the most prominent emission line in the solar spectrum, there has been a notable lack of studies devoted to variations in Lyman-alpha (Ly$\\alpha$) emission during solar flares in recent years. The few examples that do exist, however, have shown Ly$\\alpha$ emission to be a substantial radiator of the total energy budget of solar flares (on the order of 10%). It is also a known driver of fluctuations in earth's ionosphere. The EUV Variability Experiment (EVE) onboard the Solar Dynamics Observatory now provides broadband, photometric Ly$\\alpha$ data at 10 s cadence, and has observed scores of solar flares in the 5 years since it was launched. However, the time profiles appear to display a rise time of tens of minutes around the time of the flare onset. This is in stark contrast to the rapid, impulsive increase observed in other intrinsically chromospheric features (H$\\alpha$, Ly$\\beta$, LyC, C III, etc.). Furthermore, the Ly$\\alpha$ emission peaks around the time of the peak of thermal soft X-ray e...

  16. Lyman-Alpha Emitting Galaxies as a Probe of Reionization: Large-Scale Bubble Morphology and Small-Scale Absorbers

    E-Print Network [OSTI]

    Kakiichi, Koki; Ciardi, Benedetta; Graziani, Luca

    2015-01-01

    The visibility of LyA emitting galaxies during the Epoch of Reionization is controlled by both diffuse HI patches in large-scale bubble morphology and small-scale absorbers. To investigate the impact on LyA photons, we apply a novel combination of analytic and numerical calculations to three scenarios: (i) the `bubble' model, where only diffuse HI outside ionized bubbles is present; (ii) the `web' model, where HI exists only in overdense self-shielded gas; and (iii) the more realistic 'web-bubble' model, which contains both. Our analysis confirms that there is a degeneracy between the ionization structure of the intergalactic medium (IGM) and the HI fraction inferred from LyA surveys, as the three models suppress LyA flux equally with very different HI fractions. We argue that a joint analysis of the LyA luminosity function and the rest-frame equivalent width distribution/LyA fraction can break this degeneracy and provide constraints on the reionization history and its topology. We further show that constrain...

  17. Influence of Lymphatic Invasion on Locoregional Recurrence Following Mastectomy: Indication for Postmastectomy Radiotherapy for Breast Cancer Patients With One to Three Positive Nodes

    SciTech Connect (OSTI)

    Matsunuma, Ryoichi; Oguchi, Masahiko; Fujikane, Tomoko; Matsuura, Masaaki; Sakai, Takehiko; Kimura, Kiyomi; Morizono, Hidetomo; Iijima, Kotaro; Izumori, Ayumi; Miyagi, Yumi; Nishimura, Seiichiro; Makita, Masujiro; Gomi, Naoya; Horii, Rie; Akiyama, Futoshi; Iwase, Takuji

    2012-07-01

    Purpose: The indication for postmastectomy radiotherapy (PMRT) in breast cancer patients with one to three positive lymph nodes has been in discussion. The purpose of this study was to identify patient groups for whom PMRT may be indicated, focusing on varied locoregional recurrence rates depending on lymphatic invasion (ly) status. Methods and Materials: Retrospective analysis of 1,994 node-positive patients who had undergone mastectomy without postoperative radiotherapy between January 1990 and December 2000 at our hospital was performed. Patient groups for whom PMRT should be indicated were assessed using statistical tests based on the relationship between locoregional recurrence rate and ly status. Results: Multivariate analysis showed that the ly status affected the locoregional recurrence rate to as great a degree as the number of positive lymph nodes (p < 0.001). Especially for patients with one to three positive nodes, extensive ly was a more significant factor than stage T3 in the TNM staging system for locoregional recurrence (p < 0.001 vs. p = 0.295). Conclusion: Among postmastectomy patients with one to three positive lymph nodes, patients with extensive ly seem to require local therapy regimens similar to those used for patients with four or more positive nodes and also seem to require consideration of the use of PMRT.

  18. The mystery of spectral breaks: Lyman continuum absorption by photon-photon pair production in the Fermi GeV spectra of bright blazars

    SciTech Connect (OSTI)

    Stern, Boris E. [Institute for Nuclear Research, Russian Academy of Sciences, Prospekt 60-letiya Oktyabrya 7a, Moscow 117312 (Russian Federation); Poutanen, Juri, E-mail: stern.boris@gmail.com, E-mail: juri.poutanen@utu.fi [Tuorla Observatory, University of Turku, Väisäläntie 20, FI-21500 Piikkiö (Finland)

    2014-10-10

    We re-analyze Fermi/LAT ?-ray spectra of bright blazars using the new Pass 7 version of the detector response files and detect breaks at ?5 GeV in the rest-frame spectra of 3C 454.3 and possibly also 4C +21.35, associated with the photon-photon pair production absorption by the He II Lyman continuum (LyC). We also detect significant breaks at ?20 GeV associated with hydrogen LyC in both the individual spectra and the stacked redshift-corrected spectrum of several bright blazars. The detected breaks in the stacked spectra univocally prove that they are associated with atomic ultraviolet emission features of the quasar broad-line region (BLR). The dominance of the absorption by the hydrogen Ly complex over He II, a small detected optical depth, and break energy consistent with head-on collisions with LyC photons imply that the ?-ray emission site is located within the BLR, but most of the BLR emission comes from a flat disk-like structure producing little opacity. Alternatively, the LyC emission region size might be larger than the BLR size measured from reverberation mapping, and/or the ?-ray emitting region is extended. These solutions would resolve the long-standing issue of how the multi-hundred GeV photons can escape from the emission zone without being absorbed by softer photons.

  19. HAPPENING THIS WEEK NEWSLETTER FOR NOVEMBER 18th-NOVEMBER 25

    E-Print Network [OSTI]

    Lawrence, Rick L.

    ENERgy aNd SuSTaiNaBiLiTy WiLL pRESENT ThEiR pOSTERS ON TOpicS Such aS BiOMaSS FuELS, ENERgy EFFiciENcy, MSu ENERgy aNd SuSTaiNaBiLiTy EFFORTS, SOLaR ThERMaL ENERgy, SuSTaiNaBLE FOOd SySTEMS aNd ag FOR SuSTaiNaBLE FOOd pROducTiON. GET A HolD oF uS ThE MSu OFFicE OF SuSTaiNaBiLiTy ThE MSu OFFicE OF SuSTaiNaBiLiTy

  20. Distance Priors from \\emph{Planck} 2015 data

    E-Print Network [OSTI]

    Qing-Guo Huang; Ke Wang; Sai Wang

    2015-09-03

    We update the distance priors by adopting $Planck~ \\textrm{TT,TE,EE}+\\textrm{lowP}$ data released in 2015, and our results impose at least $30\\%$ tighter constraints than those from $Planck~ \\textrm{TT}+\\textrm{lowP}$. Combining the distance priors with the combination of supernova Union~2.1 compilation of 580 SNe (Union~2.1) and low redshift Baryon Acoustic Oscillation (BAO) data, we constrain the cosmological parameters in the freely binned dark energy (FBDE) and FBDE$+\\Omega_k$ models respectively, and find that the equations of state of dark energy in both models are consistent with $w=-1$. Furthermore, we show that the tension with the BAO data at $z=2.34$ from Ly$\\alpha$ forest (Ly$\\alpha$F) auto-correlation and Combined Ly$\\alpha$F cannot be relaxed in the FBDE and FBDE$+\\Omega_k$ models.

  1. Swift-UVOT captures the earliest ultraviolet spectrum of a Gamma Ray Burst

    E-Print Network [OSTI]

    N. P. M. Kuin; W. B. Landsman; M. J. Page; P. Schady; M. Still; A. A. Breeveld; M. De Pasquale; P. J. Brown; M. Carter; C. James; P. A. Curran; A. Cucciara; C. Gronwall; S. T. Holland; E. A. Hoversten; S. Hunsberger; T. Kennedy; S. Koch; H. Lamoureux; F. E. Marshall; S. R. Oates; A. Parsons; D. Palmer; P. Roming; P. J. Smith

    2009-01-28

    We present the earliest ever ultraviolet spectrum of a gamma-ray burst (GRB) as observed with the Swift-UVOT. The GRB 081203A spectrum was observed for 50 seconds with the UV grism starting 251 seconds after the Swift-BAT trigger when the GRB was of u ~13.4 mag and still rising to its peak optical brightness. The UV grism spectrum shows a damped Ly-alpha line, Ly-beta, and the Lyman continuum break at a redshift z = 2.05 +/- 0.01. A model fit to the Lyman absorption implies log N(HI) = 22.0 +/- 0.2 cm-2, which is typical for GRB host galaxies with damped Ly-alpha absorbers. This observation of GRB 081203A demonstrates that for GRBs brighter than v ~14 mag and with 0.5 Swift-BAT trigger.

  2. Swift-UVOT captures the earliest ultraviolet spectrum of a Gamma Ray Burst

    E-Print Network [OSTI]

    Kuin, N P M; Page, M J; Schady, P; Still, M; Breeveld, A A; De Pasquale, M; Brown, P J; Carter, M; James, C; Curran, P A; Cucciara, A; Gronwall, C; Holland, S T; Hoversten, E; Hunsberger, S; Kennedy, T; Koch, S; Lamoureux, H; Marshall, F E; Oates, S R; Parsons, A; Palmer, D; Roming, P; Smith, P J

    2008-01-01

    We present the earliest ever ultraviolet spectrum of a gamma-ray burst (GRB) as observed with the Swift-UVOT. The spectrum of GRB 081203A was observed for 50 seconds with the UV grism starting 251 seconds after the Swift-BAT trigger when the GRB was of u ~13.4 mag and still rising to its peak optical brightness. The UV grism spectrum shows a damped Ly-alpha line, Ly-beta, and the Lyman continuum break at a redshift z = 2.05 +/- 0.01. A model fit to the Lyman absorption implies log N(HI) = 22.0 +/- 0.2 cm-2, which is typical for GRB host galaxies with damped Ly-alpha absorbers. This observation of GRB 081203A demonstrates that for GRBs brighter than v ~14 mag and with 0.5 Swift-BAT trigger.

  3. Three Essays on Semiparametric Econometrics: Theory and Application 

    E-Print Network [OSTI]

    Li, Hongjun

    2014-04-25

    containing mixed discrete/ordered categorical and continuous variables, and presume interest lies in smooth estima- tion of F (y), the cumulative distribution function or S(y) = 1 ? F (y), the sur- vivor function (results below transfer immediately.... For the discrete vari- ables we use the kernel l(Y dis, y d s , ?s) = ? |Y dis?y d s | s (with ?0s = 1 and 0 0 = 1), where 1(A) = 1 if A holds, and 0 otherwise. I write the product (discrete variable) kernel as L?(ydi , y d, ?) = ?r s=1 l(y d is, y d s , ?s...

  4. Examen Mercredi 14 Janvier 2009 Exercice 1 : Estimation

    E-Print Network [OSTI]

    Tourneret, Jean-Yves

    - axi)2 22 # , = ¡ 22 ¢-n/2 exp " - 1 22 nX i=1 (yi - axi)2 # . On a alors ln L(y1, ..., yn; a) = - n 2 ln ¡ 22 ¢ - 1 22 nX i=1 (yi - axi)2 . En ´etudiant le signe de ln L(x1,...,xn;) a , on obtient : ln L(y1, ..., yn; a) a 0 1 2 " nX i=1 yixi - a nX i=1 x2 i # 0, a Pn i=1 yixi Pn i=1 x2 i . La

  5. La vie Monseigneur Saint Fiacre

    E-Print Network [OSTI]

    1960-01-01

    . LE CHEVALIER 76 Vous le sarez sanz nul contraire. Monseigneur veult qu'a ly vegniez A celle fin que vous pregniez Fiacre son filz a mary. 80 Venez avec moy sanz destry, Et sy ly faites bonne chiere, A celle fin qu'il vous ait chiere. Miex en... matere Quant sy fakement vous refuse. 152 Sa jonesse povrement use, Car il ne tient de luy nul conte. Plus tendra terre que un conte S'il vit a age. LA PUCELLE 156 M'amie, vous dites que sage. A son pere vois congié prendre. **Cy parle au pere St...

  6. The comparative reactivity of some esters of benzoic acid with aniline

    E-Print Network [OSTI]

    Smith, Howard V.

    1921-01-01

    added careful ly, the f lask being kept cold meanwhile. The benzoic acid was added to the cold solut ion, and the f lask then heat­ ed on a water bath under a reflux condenser for two hours The mixture boiled gently and became very dark in col­ or... added careful ly, the f lask being kept cold meanwhile. The benzoic acid was added to the cold solut ion, and the f lask then heat­ ed on a water bath under a reflux condenser for two hours The mixture boiled gently and became very dark in col­ or...

  7. Late Victorian social expression in the novels of F. Scott Fitzgerald 

    E-Print Network [OSTI]

    Love, Alan Carson

    1966-01-01

    of the eax ly 1870's , 5 the transformation from the stable mid pexiod economy to depression, because investments no longex bxought the high x'eturns obtained during the eax'ly Victox'ian age and businessmen sought new inv- stments abroad; the new , 6 3...LATE VXCTOIXAH EOCXAL EXPRES$XOH XW THE HOVERS OF Fe SCOTT FXTEQ~~P Alan Carson Love 3uhmitted to the Graduate College oS the Texas AAR University in partial SulSlllrnent oS the reguirements Sor the degree oS ~T;:R QF ARTS August, 1966...

  8. Development and Features EatSafe: Modular Portable Food Sensor

    E-Print Network [OSTI]

    California at San Diego, University of

    , Duncan McClure5 Support Members: Chau Ly2,3, David Zhao4, Nolan Nitta1 3D Printer / Laser Cutter On prototyping using state of the art laser cutting and 3D printer processes allowed for the device

  9. THE PHOTON UNDERPRODUCTION CRISIS

    SciTech Connect (OSTI)

    Kollmeier, Juna A. [Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Weinberg, David H.; McEwen, Joseph [Astronomy Department and CCAPP, Ohio State University, Columbus, OH 43210 (United States); Oppenheimer, Benjamin D.; Danforth, Charles [Astronomy Department, University of Colorado, Boulder, CO 80309 (United States); Haardt, Francesco [Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, Via Valleggio 11, I-22100 Como (Italy); Katz, Neal; Fardal, Mark [Astronomy Department, University of Massachusetts, Amherst, MA 01003 (United States); Davé, Romeel [University of the Western Cape, Bellville, Cape Town 7535 (South Africa); Madau, Piero [Department of Astronomy and Astrophysics, University of California, 1156 High Street, Santa Cruz, CA 95064 (United States); Ford, Amanda B. [Astronomy Department, University of Arizona, Tucson, AZ 85721 (United States); Peeples, Molly S., E-mail: jak@obs.carnegiescience.edu [Space Telescope Science Institute, Baltimore, MD 21218 (United States)

    2014-07-10

    We examine the statistics of the low-redshift Ly? forest from smoothed particle hydrodynamic simulations in light of recent improvements in the estimated evolution of the cosmic ultraviolet background (UVB) and recent observations from the Cosmic Origins Spectrograph (COS). We find that the value of the metagalactic photoionization rate (?{sub HI}) required by our simulations to match the observed properties of the low-redshift Ly? forest is a factor of five larger than the value predicted by state-of-the art models for the evolution of this quantity. This mismatch in ?{sub HI} results in the mean flux decrement of the Ly? forest being overpredicted by at least a factor of two (a 10? discrepancy with observations) and a column density distribution of Ly? forest absorbers systematically and significantly elevated compared to observations over nearly two decades in column density. We examine potential resolutions to this mismatch and find that either conventional sources of ionizing photons (galaxies and quasars) must contribute considerably more than current observational estimates or our theoretical understanding of the low-redshift universe is in need of substantial revision.

  10. Table 1.-Statlsllcal dala on Argentina's major fishery slacks, 1980. Foreign Fishery Developments

    E-Print Network [OSTI]

    Table 1.-Statlsllcal dala on Argentina's major fishery slacks, 1980. Foreign Fishery Developments Argentina Revises Marine Resources Forecast squid one of the country's major fish- eries. INIDEP indicated- ly. Argentina signed a cooperative research agreement in 1980 with the Soviet Union to study

  11. Biomass Plantation Inergy Systems and Sustainable DevelD~ment

    E-Print Network [OSTI]

    -usingtechnologIesare . Total= 2+7exaioules Oil n.. la 1 22- billi WORLD relativelyinefficient:thus,bio- cupu non=. on Total.)Furthermore, mostbiomassenergy Such \\isions of large contributions by biomass ro global today comes from natural forest}'S,if the production and conversionof biomassis ly and economically competitive \\virh fossil fuel alrernarives

  12. KU Today, July 10, 2012

    E-Print Network [OSTI]

    St. Full Story TWITTER @kunews #Kubball non-conf sked is out. Get ready for Mich St, Wazzu, Oregon St, Richmond and one school that may carry a grudge http://ow.ly/c2UNE View all tweets FEATURED MULTIMEDIA KU ON YOUTUBE...

  13. Advances and limits of using population genetics to understand

    E-Print Network [OSTI]

    Ross-Ibarra, Jeffrey

    as being extreme- ly common [1] and central to understanding the role of adaptation in shaping species diversity. Local adaptation also can contribute to the maintenance of genetic variation, be a stepping stone experiments to investigate the role of habitat in driving population divergence. Even earlier, forest tree

  14. LIVE CARS FOR USE IN CATFISH INDUSTRY Donald C. ,r nland, Rob rt L. ..rill,

    E-Print Network [OSTI]

    LIVE CARS FOR USE IN CATFISH INDUSTRY Donald C. ,r nland, Rob rt L. ..rill, & Jam's . IIall Live cars - -m sh "fish -holdmg bags "- -hav a vari tyof applications in th produ tion of pond - rai d chann fish to mov into th liv car . Information on holding capaciti and a m thod to accu- rat ly m t l' fish

  15. Approach for the 3D-alignment in micro-and nano-scale assembly processes

    E-Print Network [OSTI]

    Boyer, Edmond

    as known from the macro- and meso-scale. Although a lot of similarities exist for both regimes, micro to the f meso-scale p ly machine by human rt and the h her in positi owever, dep an be used outcome h

  16. SANDIA REPORT SAND2001-1441

    E-Print Network [OSTI]

    SANDIA REPORT SAND2001-1441 Unlimited Release Printed May 2001 Analysis of a Composite Blade Design-1441 Unlimited Release Printed May 2001 Analysis of a Composite Blade Design for the AOC lY50 Wind Turbine Using Abstract A fiberglass blade was designed for the Atlantic Orient Corporation (AOC) H/50 wind turbine

  17. KU Today April 19, 2012

    E-Print Network [OSTI]

    2012-04-19

    , 2012 7:30 p.m. Dole Institute of Politics View all events TWITTER @KUNews Please take a moment to fill out this brief survey regarding the @KUNews Twitter account: http://ow.ly/anl7Y View all tweets FEATURED MULTIMEDIA KU ON FLICKR...

  18. On the practical limits to substitution Robert U. Ayres

    E-Print Network [OSTI]

    . Keywords: Weak sustainability Strong sustainability Substitution Resources Technology 1. Introduction to assume­basical- ly for convenience­that every technology can be improved upon and every barrier can "Limits to Growth (Meadows, 1972). The Solow paper "The economics or resources, or the resources

  19. 2015 Phi Beta Kappa Nominees Marc Andre Abboud

    E-Print Network [OSTI]

    Burke, Kieron

    Ting Ng Irene Sandy Ng William Bill Ngo Tricia Thuy Trang Nguyen Bac-Ha Hoang Nguyen Long Ly Lac Nguyen Datu Soraya Davia Eric Kwang Davis Trisha Lynn Deason Casey Evan Deaver Kathleen Deck Wilfred Oconer Suzanne Kellogg Noble William Kennamer Kacie Nicole Kesler Lauren Taylor Kim Annie Yu Rim Kim Logan

  20. art Phones ha versity of Wa

    E-Print Network [OSTI]

    nformation st ly to the partic ormation, con ontact. For ins he smart phon y Risk Ad tion Settin a well should pe or erase its row (for exam e. This can be ge, or through a good idea to phone has "se e

  1. Our institut Internationa

    E-Print Network [OSTI]

    of Higher E ly transpare social equity rganisation a nd training in o is to partic t studying th eration portunities o cademic staff e of good pra e then, more ng also one o that framew very strict qu so that its Ac

  2. 6.2.8 Neural networks for data mining Walter Kosters

    E-Print Network [OSTI]

    Kosters, Walter

    6.2.8 Neural networks for data mining Walter Kosters 1 In many application areas neural networks distinctive member of the large family of neural networks), and we final- ly focus on their usefulness notice that the idea of neural networks originates from the physiology of the human brain. General

  3. Forest Resources: Eastern Wild Turkey Management http://tfsweb.tamu.edu Page 1 of 1

    E-Print Network [OSTI]

    Forest Resources: Eastern Wild Turkey Management http://tfsweb.tamu.edu Page 1 of 1 Diet: Turkeys are opportunistic omnivores feeding on what is seasonably available. The wild turkey's diet is approxi- mately 75 grasshoppers, ants, beetles, spiders) and snails. Turkey poults are particular- ly dependent on insects during

  4. SPE-139032-PP Field Development Strategies for Bakken Shale Formation

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    rial doe s n ot n ece ssa ri ly refle ct a n y po sitio n of th e So ciet y o f Pet role um E ngine ers was generated, history matched and economical analysis for some proposed new wells is performed. Introduction

  5. Courses: Education: Curriculm and Teaching (EDCT) Page 301Sonoma State University 2013-2014 Catalog Education: Early Childhood Education (EDEC)

    E-Print Network [OSTI]

    Ravikumar, B.

    Education: Early Childhood Education (EDEC) edeC 201 foundAtionS of eArLy CAre And eduCAtion (4) This course and contemporary models of early childhood education, principles of developmentally and culturally appropriate practice, contemporary issues in early care and education, professional ethics, and professional career

  6. MALCOLM B. HALE and MELVIN E. WATERS Frozen Storage Stability of

    E-Print Network [OSTI]

    tropical areas, such as Hawaii, selective- ly harvest larger prawns from year- round culture ponds whole had a consis- tently softer texture than those storedas tails. This was due more to the prawns provided by MRRI per- sonnel from the October 1979 harvest of experimental culture ponds. The freshly

  7. Inference for the Pareto, half normal and related distributions

    E-Print Network [OSTI]

    Olive, David

    such as national incomes. See Arnold (1983) for additional applications. If Y has a Pareto distribution, Y PAR parameter exponential distribution and X G(1, ). Inference for this distribution is discussed, for example are the observed values of Yi, then maximizing the log likelihood log(LY ()) is equivalent to maximizing log

  8. Journal of Volcanology and Geothermal Research, 43 (1990) 113-132 Elsevier Science Publishers B.V., Amsterdam

    E-Print Network [OSTI]

    Faulds, James E.

    1990-01-01

    Journal of Volcanology and Geothermal Research, 43 (1990) 113-132 Elsevier Science Publishers B lava: the Bracks Rhyolite. Trans-Pecos Texas. J. Volcanol. Geotherm. Res., 43: 113-132. Field and mineralogical- ly homogeneous, both laterally and vertically. Evidence that the Bracks was emplaced as a lava

  9. Snow ball earth and the split of Streptophyta and Chlorophyta

    E-Print Network [OSTI]

    (Mya), the ancestor of all green plants evolved into two major groups: the Chlor- ophyta (many green algae) and the Streptophyta (some green algae and land plants = embryophytes). Both groups are separated of the terrestrial habitat because embryophytes, the descendants of streptophyte algae, today complete- ly dominate

  10. INTRODUCTION Gap junctions are intercellular protein channels formed by

    E-Print Network [OSTI]

    Snyder, Scott A.

    expressed in both HeLa transfectants (rat Cx26, rat Cx32 and mouse Cx45) and Xenopus oocytes (rat Cx26 and rat Cx32). In HeLa cells, we examined permeability to two fluorescent molecules: Lucifer Yellow (LY of the kinetics of fluorescent dye transfer showed Cx32, Cx26 and Cx45 to have progressively decreasing

  11. Engineering mesoscale structures with distinct dynamical implications

    E-Print Network [OSTI]

    Engineering mesoscale structures with distinct dynamical implications Anne-Ly Do1 , Johannes H that there are certain mesoscale subgraphs that have precise and distinct consequences for the system-level dynamics. In particular, if mesoscale symmetries are present then eigenvectors of the Jacobian localise on the symmetric

  12. Public sentiment in the United States towards the tariff, 1816-1828 

    E-Print Network [OSTI]

    Matthews, John Francis

    1968-01-01

    ly a:". footed. -"-. pl esentative eorm, -ul*' ert of 'asachuse' ta ap '-e au ';"~eainat 't:le mo lon 3 ayi ~C; that in orner to aava;Dan ' a t' ' rs i't 'w'aa n'cease- y ta ". ct pramptl; . ". 'hc ;hqa ?iau is nat van ed, " a'ld:. 'ulbert, 'ter...

  13. L1 Regularization Path Algorithm for Generalized Linear Models

    E-Print Network [OSTI]

    Hastie, Trevor

    of the paths; we suggest intuitive and flexible strategies for choosing appropriate values. We demonstrate: ^() = argmin {- log L(y; ) + 1}, (2) where > 0 is the regularization parameter. Logistic regression with L1 the most complex stage possible. By generating the regularization path rather than computing solutions

  14. 56 BOSTONIA Fall 2014 Invisible Beasts

    E-Print Network [OSTI]

    Spence, Harlan Ernest

    other firefly species." How love- ly it would be if some (but most cer- tainly not all) of these beasts resentful, year-round folks. A question about who owned the town and who merely used it." Miller provides in the nearby town of Jefferson held the community in terror. Miller says she is drawn repeat- edly

  15. ireless networks of sensors greatly extend our ability to monitor and control the physical

    E-Print Network [OSTI]

    Bulusu, Nirupama

    , and artificial systems. Applica- tions include environmental monitoring of water and soil, tagging small animals need to be able to localize within a fair- ly low response time. · Low energy: Small untethered nodes have modest processing capabilities and limited energy resources. If a device uses all its energy

  16. The internal tide off Panama City, Florida 

    E-Print Network [OSTI]

    Boston, Noel Edward James

    1963-01-01

    water. The phenomenon was also noted by slowly moving steamers but when their speed was in- creased to a few knots the resistance disappeared. This "dead water" effect was par'ticular'ly striking to Fridjof Nansen during his polar cruise in the FRAN...

  17. Distribution, Abundance, and Status of the Greater Sage-Grouse, Centrocercus urophasianus, in Canada

    E-Print Network [OSTI]

    Aldridge, Cameron

    of habitat changes, livestock grazing pressure, oil and gas developments, or climate change, all of which low, suggesting that production and overwinter survival of young are the major problems related to the decline. Low chick survival rate, with only 18% surviving to 50 days of age, is the most like- ly

  18. The Effect of Food on Economic Dairy Production. 

    E-Print Network [OSTI]

    Soule, A. M.

    1898-01-01

    ................................................................................................. Houston. Hon. W. R . C a v i t t ...............................................................................................................Bryan. D , Y P F . P. D , B B L Y X... PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP.Dallas. D , Y P eZ L U P A, o LY PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPBrown wood. D , Y P pR T TP p, Z Y U , Y...

  19. A Study of the Energy Saving and Capacity Improvement Potential of Power Control in Multi-hop Wireless Networks

    E-Print Network [OSTI]

    Hwu, Wen-mei W.

    A Study of the Energy Saving and Capacity Improvement Potential of Power Control in Multi with respect to energy consumption and network capacity. We show that power control large- ly improves the network capacity and energy savings in all investigated scenarios, and that utilizing a greater number

  20. Developing a Regional Integrated Assessment Model (RIAM) Framework PRINCIPAL INVESTIGATOR: Benjamin L. Preston

    E-Print Network [OSTI]

    responses of human systems. This project seeks to apply a regional IAM framework to the Gulf Coast region issues, and energy supply issues are all occurring simultaneous- ly, but for which integrated modeling regionalized to develop a new regional IAM capability (Regional Global Change Assessment Model *RCGAM+). RCGAM

  1. Social Media: Hurricanes #HurricanePrep #SummerSafety #ItOnlyTakesOne

    E-Print Network [OSTI]

    Social Media: Hurricanes #HurricanePrep #SummerSafety #ItOnlyTakesOne Please help the NWS the dangers associated with a hurricane or tropical system will help you understand how to prepare. Learn about the dangers in this short video from NOAA's National Hurricane Center. http://bit.ly/1I1q

  2. 96 IEEE power & energy magazine march/april 2005 THE MASSIVE POWER OUTAGE OF

    E-Print Network [OSTI]

    Amin, S. Massoud

    96 IEEE power & energy magazine march/april 2005 T THE MASSIVE POWER OUTAGE OF August 2003- gic--of the energy and infrastructure security challenges facing our nation. Those authors-level backups, to focus main- ly on coping is unwisely defeatist. As an energy professional and an electrical

  3. Shekhar Xiong: GIS --Entry 214 --2007/6/29 --18:09 --page 1 --LE-TEX Generalization and Symbolization 1

    E-Print Network [OSTI]

    by the human cartographer. In the context of geographical16 information systems (GIS), this process is modeled with geographical information. Ear- 60 ly work in automated mapping focused on supporting the 61 activities with the appli-10 cation of a set of algorithms to geographic data (represent-11 ed in vector form) in order

  4. The rate of heating in vibrating billiards Doron Cohen

    E-Print Network [OSTI]

    Cohen, Doron

    ) Lou Pecora (NRL) Nir Davidson (Weizmann) Alex Barnett (Harvard 2000-2001) Rick Heller (Harvard): Blocki, Boneh, Nix, Randrup, Robel, Sierk, Swiatecki, Koonin The Wall formula (II): Barnett, Cohen = E / L = 2/(kEL) = function of E R Ly Lx [1] A. Barnett, D. Cohen, E.J. Heller (PRL 2000, JPA 2000

  5. Perceptions are the basis for our understanding of the world. For

    E-Print Network [OSTI]

    of symbolic repre- sentation of the outside world; a self-made model of the world. What we perceive really depends essential- ly on unconscious cognitive deci- sions and conclusions. The brain usually makes especially bothered about the actual realities. We cannot force our way to the out- side through the nerves

  6. KU Today, September 20, 2012

    E-Print Network [OSTI]

    ://ow.ly/d/NKI View all tweets FEATURED MULTIMEDIA CAMPUS NEWS Join an autumnal equinox tour Learn about the interrelations of the stars and certain remarkable buildings on the KU campus at equinox on a tour that begins at 5 a.m. Friday, Sept. 21...

  7. PublicationsmailagreementNo.40014024 The University of Victoria's

    E-Print Network [OSTI]

    Victoria, University of

    newspaper ring.uvic.ca SPEED READING THE RANKINGS UVic ranked 11th-best in world under age 50 The University ofVictoria has placed 11th in the world and first in Canada among universities under 50 years of age, citations, teaching, international outlook and industry income. More: http://bit.ly/ UVicTHE LABOUR

  8. Inspired by Gregor Mendel's cross-breeding experiments with peas, researchers around the world endeavored to track down the mechanisms of inheritance. Elisabeth Schiemann, plant geneticist

    E-Print Network [OSTI]

    Falge, Eva

    tricky subject. TEXT ELKE MAIER Strawberry Fields Forever Mara des Bois has an enticing fruity flavor thou- sands of strawberry varieties available - and that despite the fact that plant breeders have long been bewildered by the infuriating- ly complex inheritance patterns of the strawberry plant. Elisa

  9. Multiwavelength Thermal Emission

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Multiwavelength Astronomy NASA #12;Thermal Emission #12;Thermal Emission Non-thermal p-p collisions Optical IR Radio/ Microwave sources of emission massive stars, WHIM, Ly many dust, cool objects-ray ~GeV Gamma-ray ~TeV sources of emission AGN, clusters, SNR, binaries, stars AGN (obscured), shocks

  10. The Humpback Whale, Megaptera novaeangliae

    E-Print Network [OSTI]

    or flippers. Occasional- ly it holds one flipper in the air while lying on one side or both. The humpback has humpback whale on its wintering grounds near Maui, Hawaii. Note the ex- tremely long flippers. Photo by J to nearshore pollution, boat traffic, mineral and industrial development, and other human activi- ty

  11. THE UNIVERSITY OF WESTERN ONTARIO Human Resources

    E-Print Network [OSTI]

    Cunningham, Ian

    Radiation Safety Coordinator on matters of all radiation safety including nuclear substances and radiationTHE UNIVERSITY OF WESTERN ONTARIO Human Resources Occupational Health and Safety SAFETY MANUAL FOR NON-MEDICAL X-RAY EQUIPMENT Prepared by Mr. H. Ly Radiation Safety Coordinator Approved

  12. Journal of Chromatography A, 987 (2003) 403408 www.elsevier.com/locate/chroma

    E-Print Network [OSTI]

    Miksik, Ivan

    2003-01-01

    - multivariate mathematical­statistical method suitable ly covalently bonded to the support [1] which, the burgh, PA, USA) analytical pump using bidistilled dimensions of the matrices of PC loadings and water a Liquopump Model 312 (Labor MIM, Budapest, mapping technique (NLMAP) [17]. Hungary) pump, a Cecil CE-212

  13. Damped Lyman Alpha Systems at High Redshift and Models of Protogalactic Disks

    E-Print Network [OSTI]

    Prochaska, Jason X.

    of neutral gas in individual dark matter halos at high redshift. For example, neutral gas in damped Ly is well approximated by a cold dark matter model with critical density and vanishing cosmological constant and CDM normalizations. Whereas the column density distribution favors small disks with large neutral gas

  14. Nuclear Instruments and Methods in Physics Research A 425 (1999) 480--487 A decommissioned LHC model magnet as an axion telescope

    E-Print Network [OSTI]

    1999-01-01

    Laboratorio de Fisica Nuclear y Atlas Energias, Faculdad de Ciencias, Universidad de Zaragoza, E50009 Zaragoza LHC bending magnet can be utilized as a macroscopic coherent solar axion-to-photon converter.V. All rights reserved. PACS: 41.85.Lc; 85.25.Ly; 14.80.-j; 14.80.Mz; 92.60.Vb; 95 Keywords: Solar axions

  15. Pseudomonas fluorescens -A robust manufacturing platform

    E-Print Network [OSTI]

    Lebendiker, Mario

    Pseudomonas fluorescens -A robust manufacturing platform Reprinted from July/August 2004 Speciality at efficient- ly transporting single chain antibodies and other mammalian-derived proteins. In addition production. Dowpharma, a contract manufacturing services unit of Dow Chemical, has developed a manufacturing

  16. KU Today, February 25, 2013

    E-Print Network [OSTI]

    @kualumni Did you watch the Oscars? Disney's Paperman, featuring Kari Wahlgren, c'99, won best animated short: ow.ly/i1DNY #kualumni View all tweets FEATURED MULTIMEDIA SCHOOL OF ENGINEERING CReSIS featured at Science Nation More: photos...

  17. A True Measure of Exposure 234 Los Alamos Science Number 23 1995

    E-Print Network [OSTI]

    Massey, Thomas N.

    news media and, more recently, by the President's Advisory Committee on Human Radiation Experiments. AlA True Measure of Exposure 234 Los Alamos Science Number 23 1995 #12;T he human tissue analysis pro- though this program does not technical- ly fall under the description of "human experimentation

  18. "Ask Argonne" - Charlie Catlett, Computer Scientist, Part 2

    ScienceCinema (OSTI)

    Catlett, Charlie

    2014-07-15

    A few weeks back, computer scientist Charlie Catlett talked a bit about the work he does and invited questions from the public during Part 1 of his "Ask Argonne" video set (http://bit.ly/1joBtzk). In Part 2, he answers some of the questions that were submitted. Enjoy!

  19. Transactions of the ASABE Vol. 56(4): 1529-1539 2013 American Society of Agricultural and Biological Engineers ISSN 2151-0032 1529

    E-Print Network [OSTI]

    He, Brian

    and Biological Engineers ISSN 2151-0032 1529 CHARACTERIZATION OF MICROALGAE FOR THE PURPOSE OF BIOFUEL PRODUCTION Z. Bi, B. B. He ABSTRACT. It is now widely accepted that microalgae are promising candidate feedstocks for biofuel production, especial- ly for biodiesel. Microalgae consist of a vast number of species

  20. Agents on the Web The Sentient Web

    E-Print Network [OSTI]

    Huhns, Michael N.

    Agents on the Web The Sentient Web "I n a startling revelation, a team of uni- versity scientists. In spite of the ominous tone typically cho- sen for dramatic effect, a sentient Web would be more helpful and much easier for people to use. When people find the Web frustrating, it is usual- ly not because

  1. Winter 2011 Evaluating Protein-Protein Docking Web Servers

    E-Print Network [OSTI]

    Nina Ly Winter 2011 Evaluating Protein-Protein Docking Web Servers Proteins are involved in many protein docking web servers: PIPER, GRAMM-X, 3D Garden, SmoothDock and PatchDock. I #12;will also perform structure. All of these web servers are freely available with no requirement to have an account

  2. Degree project in Communication Systems

    E-Print Network [OSTI]

    Maguire Jr., Gerald Q.

    for instrumentation (PXI) modules. The main objective of this project is to evaluate how different PXI modules workDegree project in Communication Systems Second level, 30.0 HEC Stockholm, Sweden W I L LY W A N G Evaluating the use of PXI modules in tests of a radio base station KTH Information and Communication

  3. RESEARCH Open Access Opposite regulation by PI3K/Akt and MAPK/ERK

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    RESEARCH Open Access Opposite regulation by PI3K/Akt and MAPK/ERK pathways of tissue factor progression and metastasis. We recently found that inhibition of MAPK/ERK upregulated both full length TF (fl of these pathways, ERK inhibitor (PD98059), PI3K inhibitors (LY294002, wortmannin), Akt inhibitor (A6730), and EGFR

  4. Reset reproduction of CMU Computer Science report CMU-CS-83-106. Abbreviated ve* *rsion published in AI Mag-

    E-Print Network [OSTI]

    Reeves, Douglas S.

    , vision, or cognitive simulat* *ion. I began to seek congenial scholars outside artificial intelligence in artificial intelligence, a recognized, if infant, field. However, I cannot mere* *ly address the work to artificial intelligence because my aims and conceptions are somewhat different than those * *ordinarily held

  5. IEEE TRANSACTIONS ON MEDICAL IMAGES, MARCH 2014 1 Learning Discriminative Features and Structured

    E-Print Network [OSTI]

    Fua, Pascal

    goal is to find the parameter vector w that minimizes the empirical objective function: L(w) = N n=1 l(Y n , Y , w) + 1 2C ||w|| 2 . (1) At each iteration, Algorithm 1 chooses a random training example given by Eq. 1 with an approximation based on the training example (Xn , Y n ), yielding: f(w, n) = l

  6. nature methods | VOL.7 NO.2 | FEBRUARY 2010 | 89 an intuitive solution. Structures such as mitochon-

    E-Print Network [OSTI]

    Cai, Long

    ter med adaptive optics, which active- ly correct distortions that occur as light travels through that are dif- ficult to detangle. Taking individual swaths of light rays and swinging them back to a common, adaptive optics techniques to adjust for a flickering atmosphere require very quick corrections

  7. Non-diffusive cross field transport in scrape-off-layer in Tokamak

    E-Print Network [OSTI]

    Yu, Guanghui

    2006-01-01

    It is evenly separated into an nx×ny rectangular grid systemshown in Figure 4.1, where nx and ny are integer numbers ofby ?x and ?y, and ?x=Lx/(nx-1), ?y=Ly/(ny-1). Neither nx and

  8. An HPLC-Fluorescence Method for Identifying a Toxic Fraction Extracted from the Marine Dinoflagellate Gambierdiscus toxicus

    E-Print Network [OSTI]

    An HPLC-Fluorescence Method for Identifying a Toxic Fraction Extracted from the Marine, no analytical method, having high analytical preci- sion and a low detection limit, present- ly exists. A radioimmunoassay method (Hokama et aI., lfJ77) was reported using immunoglobulin isolated from sheep that had been

  9. The Micelle Micelle: (pronounced: my-cell) 1) Unit of structure built up from

    E-Print Network [OSTI]

    Stottrup, Benjamin L.

    Automotive Engineering. Nathan Ly will study Electrical Engineering at the University of Wisconsin, Madison workshop geared towards writing effective cover letters, resumes, and CVs in order to enter the industrial...so I chose chemistry because there is an appreciable chemical industry. My interest in science stemmed

  10. Foreign Fishery Developments Mexico's Fisheries

    E-Print Network [OSTI]

    Foreign Fishery Developments Mexico's Fisheries and Their Development The Mexican Government has Mexico to increase its food imports. The rapidly growing fishing industry has been one of Mexico's few Program (1977- 82) has already resulted in a substantial- ly increased catch of fish and shellfish. Mexico

  11. A study of the effect and efficiency of germicides on bacteria that produce ropiness in bread 

    E-Print Network [OSTI]

    Ashby, Gerald K

    1937-01-01

    , . ~~QIBI (Van graengsa) Holland is not sterilised ly Q chroaio soid, 0. 1+ iodine, or ~ formaldehyde when sub/ected to these agents at 37 G i'or one hoar. 9KggaLaia Suspensions of spores for death rate studies vers prepared as seeded from ths stock...

  12. A Performance Assessment of Express on the iPSC/2 and iPSC/860 Hypercube Computers

    E-Print Network [OSTI]

    Krovi, Venkat

    a teraflop computing speed, this trend is like­ ly to continue [12]. However, the advances in software (Com­ puter Aided Software Engineering) tools, parallelizing compilers, debuggers, and performance, NY Jaehyung Yang and Arif Ghafoor School of Electrical Engineering Purdue University, West Lafayette

  13. Published OnlineFirst April 6, 2012.Cancer Res Dhwanil Damania, Hemant K. Roy, Hariharan Subramanian, et al.

    E-Print Network [OSTI]

    Pradhan, Prabhakar

    cause of cancer-related deaths both in the United States and worldwide with a low 5-year survival rate ($60%). There are approximate- ly 141,210 new cases and 49,380 deaths reported in 2011 in United States for the low compliance rate include the discomfort of the endoscopic procedure, expense, and risk

  14. Kheshbn No. 100- Fall 1982 - Journal

    E-Print Network [OSTI]

    2010-01-01

    yvnyfrBoap-v^Myü lya^íi 8 lis pso ^ a lyayr iay? iw> ^ lyT ,ypni p'oyowuotan •lyoaxnytaB pso ig ,ypn •gooM T'x rÄi5? taoT T p ' n lypxgp l y i TK ,own pso p'p PK'O P K yoTX'teogp ,

  15. G R A D U A T E P R O G R A M S

    E-Print Network [OSTI]

    Gering, Jon C.

    of these programs at Truman State University is high- ly selective in its admission standards, and provides a high and responsibilities, see the Graduate Studies Handbook. Although most information pertaining to graduate students materials and have met the scholas- tic requirements for admission to a program. 2. Non

  16. G R A D U A T E P R O G R A M S

    E-Print Network [OSTI]

    Gering, Jon C.

    at Truman State University is high- ly selective in its admission standards, and provides a high quality the Graduate Studies Handbook. Although most information pertaining to graduate stu- dents is found to pur- sue a degree, have submitted the required application form, all supporting materials and have met

  17. G R A D U A T E P R O G R A M S

    E-Print Network [OSTI]

    Gering, Jon C.

    of these programs at Truman State University is high- ly selective in its admission standards, and provides a high the Graduate Studies Handbook. Although most information pertaining to graduate students is found materials and have met the scholas- tic requirements for admission to a program. 2. Non

  18. Evidence of Structure in the Lymanff Forest Jochen Liske and John K. Webb

    E-Print Network [OSTI]

    Liske, Jochen

    of Ly­ff forest absorption systems toward a group of eight closely spaced QSOs has been analysed to the spectra of a close group of eight QSOs with a mean redshift of 2.97. The data (Williger et al. 1996 in the spectra of a group of eight closely spaced QSOs as a function of wavelength and smoothing scale

  19. peter pesic: Many intelligent people only see in mathematics a wasteland of

    E-Print Network [OSTI]

    Mazur, Barry

    lies on top of a prior piece of mathematics and lies under the next piece of mathematics, etc. To get smiled at me and said, "I'll tell you a secret. Here is how you can do these problems more quick- ly." The "secret" he imparted to me was to invoke the magical X of algebra, re- state the problem in the language

  20. Pricing Asset Scheduling Flexibility using Optimal Rene Carmona

    E-Print Network [OSTI]

    Carmona, Rene

    Research and Financial Engineering, Bendheim Center for Finance, Princeton University, Princeton, NJ 08544 of generating assets like power plants, pipelines, storage facilities, oil refineries, etc. The ownership finance literature (Dixit 1989, Brekke and Øksendal 1994, Zervos 2003, Guo and Pham 2005, Pham and Ly Vath

  1. Positioning Unknown Words in a Thesaurus by Using Information Extracted from a Corpus

    E-Print Network [OSTI]

    Positioning Unknown Words in a Thesaurus by Using Information Extracted from a Corpus Na extracted from a large corpus. A suitable area (if the thesaurus for an unknown woM ix estimated l)y inte- grating the human intuition I)urled in the thesaurus and statistical data extracted from the corpus

  2. The Louis Stokes Alliance for Minority Participation programs support the establishment of comprehensive Alliances to

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    The Louis Stokes Alliance for Minority Participation programs support the establishment of comprehensive Alliances to increase the quantity and quality of students who successful- ly earn STEM. David Aragon and Dr. Renee Beeton External Evaluator: Dr. Rose Shaw #12;Colorado Alliance for Minority

  3. Mining the Social Web Asmelash Teka Hadgu

    E-Print Network [OSTI]

    Nejdl, Wolfgang

    ;Web 2.0 Figure: Social Media billboard2 2 http://bit.ly/10216Jy L3S Web Science 3 #12;Twitter3;Introduction Definition1 Web Science studies the vast information network of people, communities, organizationsMining the Social Web Asmelash Teka Hadgu teka@l3s.de L3S Research Center June 3, 2014 #12;Outline

  4. LETHAL YELLOWING OF PALMS http://flrec.ifas.ufl.edu/Hort/Palms/lethal_yellow_facts.htm 1 of 9 2/8/2007 10:17 AM

    E-Print Network [OSTI]

    Mazzotti, Frank

    that infects and kills coconut palms as well as many other palm species. Known since the 1800's in the western and the economic importance of coconut in the region. LY invaded Key West, Florida, probably as early as the 1930's, but was not diagnosed until the 1950's. It killed about 75% of the coconut palms on Key West before the epidemic

  5. Blue Wings and Bumps via Fermi-like Acceleration of Lyman-alpha photons across Shocks

    E-Print Network [OSTI]

    Chung, Andrew S; Ciardi, Benedetta; Gronke, Max

    2015-01-01

    We explore the impact of Fermi-like acceleration of Lyman-alpha (Ly{\\alpha}) photons across shock fronts on the observed Ly{\\alpha} spectral line shape. We first confirm the result of Neufeld & McKee (1988) that this mechanism gives rise to extended blue wings which may have been observed in some radio galaxies. Our Monte-Carlo radiative transfer calculations further show that in a minor modification of the shell-model, in which we add an additional static shell of hydrogen, this process can naturally explain the small blue bumps observed in a subset of Ly{\\alpha} emitting galaxies, which have been difficult to explain with conventional shell-models. Blue bumps can be produced with an additional column density of static hydrogen as small as $N_{HI}^{static} \\ll N_{HI}^{shell}$, and typically occur at roughly the outflow velocity of the shell. In our model the spectra of so-called 'blue-bump objects' might reflect an evolutionary stage in which the outflows regulating the escape of Ly{\\alpha} photons are s...

  6. 3. The PEP II Storage Rings and Their Impact on the BABAR Detector

    E-Print Network [OSTI]

    -II is an e+ e- storage ring system designed to operate at a center of mass (c.m.) energy of 10.58 Ge in the first year. HER and LER refer to the high energy e- and low energy e+ ring, respec- tively. Lx, Ly, and Lz refer to the horizontal, vertical, and longitudinal rms size of the luminous region. Parameters

  7. Data mining and knowledge discovery in databases have been attracting a significant

    E-Print Network [OSTI]

    Caverlee, James

    an overview of this emerging field, clarifying how data mining and knowledge discovery in databases are the subject of the emerging field of knowledge discovery in databases (KDD). At an abstract level, the KDD to understand and digest easi- ly) into other forms that might be more com- pact (for example, a short report

  8. The Next UV Spectrograph for the Hubble Space Telescope

    E-Print Network [OSTI]

    Colorado at Boulder, University of

    The cosmic web is shaped by the gravity of the underlying cold dark matter, while ordinary matter serves and composition of the ordinary matter concentrated in the `cosmic web' by observing Ly forest at low redshifts the cosmic web material (composition and its specific location in space) Observations covering vast

  9. "Ask Argonne" - Robert Jacob, Climate Scientist, Part 2

    ScienceCinema (OSTI)

    Jacob, Robert

    2014-11-24

    Previously, climate scientist Robert Jacob talked a bit about the work he does and invited questions from the public during Part 1 of his "Ask Argonne" video set (http://bit.ly/1aK6WDv). In Part 2, he answers some of the questions that were submitted.

  10. United States Department of the Interior, J. A. Krug, Se cretary Fish and Wildlife Service, Albert M. Day, Director

    E-Print Network [OSTI]

    consisted of vacuum packing the fillets in hermetically sealed tin oans. After being rapidly frozen and subsequent- ly placed in cold-storage for several months, the fish that had been vacuumized and hermetically cautions. Under such conditions, frozen foods would defrost and spoil rapidly; and when hermetically sealed

  11. Near Surface Geophysics, 2004, 93-99 2004 European Association of Geoscientists & Engineers 93

    E-Print Network [OSTI]

    Sailhac, Pascal

    of the underground targets. It is certain- ly not the case, however, when investigating ancient iron- mining sites) surveys at an Antique iron mine near Saales (France) revealed several large magnetic anomalies (of: iron oxides are electrically conductive (down to 10 m; Hesse et al. 1986) and show a high magnetic

  12. 2012;72:2720-2727. Published OnlineFirst April 6, 2012.Cancer Res Dhwanil Damania, Hemant K. Roy, Hariharan Subramanian, et al.

    E-Print Network [OSTI]

    Hartline, Jason D.

    leading cause of cancer-related deaths both in the United States and worldwide with a low 5-year survival rate ($60%). There are approximate- ly 141,210 new cases and 49,380 deaths reported in 2011 in United States (1). CRC can be cured if detected at an early stage. However, the early-stage disease is mostly

  13. Four convictions motivate this paper.1 First, nuclear power could make a signi-

    E-Print Network [OSTI]

    Four convictions motivate this paper.1 First, nuclear power could make a signi½- cant contribution to climate change mitiga- tion. To do so, however, nuclear power would have to be deployed extensive- ly of rules to govern nuclear power that are the same in all countries. Second, the world is not now safe

  14. Carbon limitation of soil respiration under winter snowpacks: potential feedbacks between growing season

    E-Print Network [OSTI]

    Carbon limitation of soil respiration under winter snowpacks: potential feedbacks between growing season and winter carbon fluxes PA U L D . B R O O K S *, D I A N E M C K N I G H T w and K E L LY E L D- latitude and high-elevation ecosystems may increase soil carbon availability both through increased litter

  15. ern Ocean was much more vigorous in the period from 1350 to 1880 A.D. than in the

    E-Print Network [OSTI]

    Zhou, Chongwu

    ). Nevertheless, if global climate change reduces the density of surface waters in the Southern Ocean (6, 15 Atlas NESDIS 4 (Na- tional Oceanographic Data Center, Silver Spring, MD, 1994). 18. K. Bryan, J. Phys- ly small, has implications for the mechanisms governing future changes in the ocean carbon cycle

  16. Micellar structure from comparison of X-ray and neutron small-angle scattering

    E-Print Network [OSTI]

    Boyer, Edmond

    249 Micellar structure from comparison of X-ray and neutron small-angle scattering T. Zemb and P according to the method developed by Hayter and Penfold. Both X-ray and neutron scattering signals, or by a combination of both. It has been shown recent- ly [1, 2] that it is possible in neutron scattering studies

  17. "Ask Argonne" - Robert Jacob, Climate Scientist, Part 2

    SciTech Connect (OSTI)

    Jacob, Robert

    2014-01-08

    Previously, climate scientist Robert Jacob talked a bit about the work he does and invited questions from the public during Part 1 of his "Ask Argonne" video set (http://bit.ly/1aK6WDv). In Part 2, he answers some of the questions that were submitted.

  18. On the Lyman-alpha Emission of Starburst Galaxies

    E-Print Network [OSTI]

    David Valls-Gabaud

    1993-06-13

    Nearby starburst galaxies have consistently shown anomalous Ly-alpha/H-beta ratios. By re-analysing the published IUE/optical observations, we show that most starbursts present a normal Ly-alpha emission, consistent with case B recombination theory, provided extinction laws appropriate to their metallicities are used. This implies that extinction is more important than multiple resonant scattering effects. The anomalous emission and absorption lines present in a few remaining galaxies are simply explained if they are observed in the post-burst phase, between about 10$^7$ and 10$^8$ yrs after the start of the burst. We use updated stellar population synthesis models to show that anomalous ratios are produced by the aging of stellar populations, since the underlying stellar Ly-alpha line is important in the cooler massive stars. The inferred low-duty cycle of massive star formation accounts naturally for the failure to detect large numbers of Ly-alpha--emitting galaxies in deep surveys and at high redshift. Some testable predictions of the proposed scenario are also discussed.

  19. January 1, 2002/ARR 1. "Overlap" Design Regions for IFE Dry Wall

    E-Print Network [OSTI]

    Raffray, A. René

    Cycle efficiency = 0.56 Netelectricpower(MW) Adjust R and Rep. Rate Direct Drive LY: Driver Energy = 1 chamber with lower cycle efficiency and electric power or the opposite Direct Drive HY: Driver Energy = 2 and chamber wall design · Power to chamber wall · Coolant outlet temperature · Cycle efficiency · Thermal

  20. "Ask Argonne" - Charlie Catlett, Computer Scientist, Part 2

    SciTech Connect (OSTI)

    Catlett, Charlie

    2014-06-17

    A few weeks back, computer scientist Charlie Catlett talked a bit about the work he does and invited questions from the public during Part 1 of his "Ask Argonne" video set (http://bit.ly/1joBtzk). In Part 2, he answers some of the questions that were submitted. Enjoy!

  1. Mechanism of G1 arrest in the Drosophilaeye imaginal disc

    E-Print Network [OSTI]

    Escudero, Luis M.; Freeman, Matthew

    2007-03-02

    to Drosophila PCNA gene function. Curr Biol 2003, 13:53-58. 22. Jarman AP, Grau Y, Jan LY, Jan YN: atonal is a proneural gene that directs chordotonal organ formation in the Drosophila peripheral nervous system. Cell 1993, 73:1307-1321. 23. Jarman AP, Grell EH...

  2. DDeeppaarrttmmeenntt ooff EEnneerrggyy FFuueell llll nnggCCee MMaannuuffaaccttuurrii

    E-Print Network [OSTI]

    --1122,, 22001111 #12;AAggeennddaa Acumentrics Overview & Approach Fuel Preparation Reforming Heat Recovery Gas SSSSttttaaaacccckkkk TTTTeeeecccchhhhnnnnoooollll fi ly and improve heat removaooooggggyyyy:::: Re ne stack assemb l regulated Biogas From anaerobic digestors, ~40-60% methane in CO2 with contaminants Thermal gasification

  3. Health on whether any sanctions should be imposed by DHHS and, if so, what they

    E-Print Network [OSTI]

    Duffy, David Cameron

    direct- ly and by example. Scientific libraries are a modest but useful carbon sink, exactly the sort salary by thinking that other qualities associated with 904 the "good academic life" would more than-team science, and by the scarcity of amenities in university life. If the nation were faced with a surfeit

  4. Genome-wide association (GWA) studies of common com-plex or multifactorial diseases have been spectacularly

    E-Print Network [OSTI]

    Abecasis, Goncalo

    that can be mapped with considerable power. These have been named expression QTLs (eQTLs)4 London, London SW3 6LY, UK. Center for Statistical Genetics, Department of Biostatistics, SPH II, Ann). An examination of common genetic variation across the genome designed to identify associations with traits

  5. Perennial Agroenergy Feedstocks as En Route Habitat for Spring Migratory Birds

    E-Print Network [OSTI]

    Landis, Doug

    +Business Media New York 2012 Abstract Increased production of bioenergy crops in North America is projected unit area (species density) was relative- ly higher in switchgrass fields. The percent land cover and species density. Habitat patch size and within-patch vegetation structure were unimportant in predicting

  6. KU Today, May 21, 2012

    E-Print Network [OSTI]

    in college football." Hint: Initials are #RCJH http://ow.ly/b4qbN View all tweets FEATURED MULTIMEDIA KANSAS PUBLIC RADIO Future of the Farmer series More: photos | videos Full Story Pulitzer winner cartoon exhibit The Robert J. Dole...

  7. IEEE Communications Magazine February 200282 JumpStart: A Just-in-Time

    E-Print Network [OSTI]

    native- ly. Another important feature is data transparency -- the network infrastructure is independent hop. Data, on the other hand, travels transparently. The work we present in this article is being is the elimination of the round-trip waiting time Ilia Baldine, MCNC George N. Rouskas, North Carolina State

  8. The Lyman alpha reference sample. III. Properties of the neutral ISM from GBT and VLA observations

    SciTech Connect (OSTI)

    Pardy, Stephen A.; Cannon, John M.; Melinder, Jens, E-mail: spardy@astro.wisc.edu, E-mail: jcannon@macalester.edu [Department of Physics and Astronomy, Macalester College, 1600 Grand Avenue, Saint Paul, MN 55105 (United States); and others

    2014-10-20

    We present new H I imaging and spectroscopy of the 14 UV-selected star-forming galaxies in the Lyman Alpha Reference Sample (LARS), aimed for a detailed study of the processes governing the production, propagation, and escape of Ly? photons. New H I spectroscopy, obtained with the 100 m Green Bank Telescope (GBT), robustly detects the H I spectral line in 11 of the 14 observed LARS galaxies (although the profiles of two of the galaxies are likely confused by other sources within the GBT beam); the three highest redshift galaxies are not detected at our current sensitivity limits. The GBT profiles are used to derive fundamental H I line properties of the LARS galaxies. We also present new pilot H I spectral line imaging of five of the LARS galaxies obtained with the Karl G. Jansky Very Large Array (VLA). This imaging localizes the H I gas and provides a measurement of the total H I mass in each galaxy. In one system, LARS 03 (UGC 8335 or Arp 238), VLA observations reveal an enormous tidal structure that extends over 160 kpc from the main interacting systems and that contains >10{sup 9} M {sub ?} of H I. We compare various H I properties with global Ly? quantities derived from Hubble Space Telescope measurements. The measurements of the Ly? escape fraction are coupled with the new direct measurements of H I mass and significantly disturbed H I velocities. Our robustly detected sample reveals tentative correlations between the total H I mass and linewidth, and key Ly? tracers. Further, on global scales, these data support a complex coupling between Ly? propagation and the H I properties of the surrounding medium.

  9. I-Love-Q relations for gravastars and the approach to the black-hole limit

    E-Print Network [OSTI]

    Pani, Paolo

    2015-01-01

    The multipole moments and the tidal Love numbers of neutron stars and quark stars satisfy certain relations which are almost insensitive to the star's internal structure. A natural question is whether the same relations hold for different compact objects and how they possibly approach the black-hole limit. Here we consider "gravastars," which are hypothetical compact objects sustained by their internal vacuum energy. Such solutions have been proposed as exotic alternatives to the black-hole paradigm because they can be as compact as black holes and exist in any mass range. By constructing slowly-rotating, thin-shell gravastars to quadratic order in the spin, we compute the moment of inertia $I$, the mass quadrupole moment $Q$, and the tidal Love number $\\lambda$ in exact form. When suitably normalized, these quantities are nonanalytical functions of the compactness of the object. The $I$-$\\lambda$-$Q$ relations of a gravastar are dramatically different from those of an ordinary compact star, but the black-hol...

  10. A refined deflected gradient search program for solving nonlinear maximization problems 

    E-Print Network [OSTI]

    Clark, Raymond Earl

    1972-01-01

    '!"'6SEI!T STATUS QE SE'"lh'SI" TECH;I[IILiES I5 i3r". ". ' . . b J pr'ob le, ", s . '0 . in I I; hP. I ~ con cinua I ly 5oo!Ping so I 0 Lions . ' ', '. b '': r, oi oi I on, l?rIPr soIOP. 0!"I t'=5'I 3 of goodncs !Io!3erally the object of r ar... ) T ! 1 a is e act ly i'be salrle as (1!1) . F1etcher anoI I'or;, all f6] piesent an 1ri!uct1!re prooi tbat 'lie vcr. toes '. X. are 1! iiear1y 1:Ide;&erident eIaervectors of II g ', ll c;:rr r-c; o. II!e ! !1 . c'er! era, ''ierII 'e " ', iree '', e...

  11. Theoretical model for plasma expansion generated by hypervelocity impact

    SciTech Connect (OSTI)

    Ju, Yuanyuan; Zhang, Qingming Zhang, Dongjiang; Long, Renrong; Chen, Li; Huang, Fenglei; Gong, Zizheng

    2014-09-15

    The hypervelocity impact experiments of spherical LY12 aluminum projectile diameter of 6.4?mm on LY12 aluminum target thickness of 23?mm have been conducted using a two-stage light gas gun. The impact velocity of the projectile is 5.2, 5.7, and 6.3?km/s, respectively. The experimental results show that the plasma phase transition appears under the current experiment conditions, and the plasma expansion consists of accumulation, equilibrium, and attenuation. The plasma characteristic parameters decrease as the plasma expands outward and are proportional with the third power of the impact velocity, i.e., (T{sub e}, n{sub e})???v{sub p}{sup 3}. Based on the experimental results, a theoretical model on the plasma expansion is developed and the theoretical results are consistent with the experimental data.

  12. T-cell differentation in lethally irradiated and reconstituted mice: functional recovery of PNA-fractionated subpopulations. [X ray

    SciTech Connect (OSTI)

    Kraal, G.; Groeneveld, P.H.P.; Boden, D.; Kors, N.

    1981-07-15

    In mammals T lymphocytes are generated in the thymus from hemopoietic precursor cells. The thymus is able to instruct the T cells during their differentiation resulting in functionally different subpopulations which can leave the thymus for the peripheral lymphoid organs. These functionally different T-cell subpopulations have been described using the alloantigens Ly-1, 2, and 3. Another probe to study thymus subpopulations is the use of the nonmitogenic lectin peanut agglutinin (PNA). After lethal irradiation and reconsitution (IR) there is a 6-day lag before thymus cells start to proliferate. In the first 6 days there is a relative enrichment of PNA-negative cells, which are Ly-1/sup +/ and radioresistant. After IR the mitogenic responses of the PNA-negative cells recover earlier than those of the PNA-positive cells; the implications of this finding for different T-cell lineages are discussed.

  13. Reprocessing of Soft X-ray Emission Lines in Black Hole Accretion Disks

    E-Print Network [OSTI]

    Christopher W. Mauche; Duane A. Liedahl; Benjamin F. Mathiesen; Mario A. Jimenez-Garate; John C. Raymond

    2004-01-16

    By means of a Monte Carlo code that accounts for Compton scattering and photoabsorption followed by recombination, we have investigated the radiation transfer of Ly alpha, He alpha, and recombination continua photons of H- and He-like C, N, O, and Ne produced in the photoionized atmosphere of a relativistic black hole accretion disk. We find that photoelectric opacity causes significant attenuation of photons with energies above the O VIII K-edge; that the conversion efficiencies of these photons into lower-energy lines and recombination continua are high; and that accounting for this reprocessing significantly (by factors of 21% to 105%) increases the flux of the Ly alpha and He alpha emission lines of H- and He-like C and O escaping the disk atmosphere.

  14. 1. Off to East London! Will be tweeting again on Tuesday Oct 26th from Johannesburg.8:06 AM Oct 19th via web

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    th via web 2. Taking the new Gautrain to airport, very excited. I wish it ran later though. Late flight tomorrow night.7:59 AM Oct 19th via web 3. Orientation is our programme to introduce new foreign docs to SA ­ we manage the details! (http://bit.ly/8Z6BHJ)7:52 AM Oct 19th via web 4. Reviewing new

  15. Final Environmental Impact Statement

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    t e i nh i b i t s synthe s i s o f e s s ent i a l am i n o ac i d s ( Shan e r a n d Lyon 1 9 80 ) and pr omo t e s d e s t r uc t i on o f ph otosynthet i c a l ly a c t i v e...

  16. Opportunities for Achieving Significant Energy Reduction in Existing University Buildings

    E-Print Network [OSTI]

    Hutyra, Lucy R.

    Management Karen Zaharee, Analyst Mike Penn, OEHS Colleen McGinty, Director Construction Shaun Finn, LEED Energy Supply 106 kBtu Energy Expenses/GHG #12;BU Energy Use Index: kbtu/ft2, by building type 72 106 72. Zhong & A. Ly) FY2007 Net Area Energy Cost CRC 9.3 M ft2 79% BUMC (1) 1.2 M ft2 21% Total 10.5 M ft2 100

  17. Assessment of operating parameter variation on electrostatic precipitator performance 

    E-Print Network [OSTI]

    Gunn, Roam Anthony

    1974-01-01

    , and the treatment and disposal of collected materials such as flyash from coal-fired power generating plants. ~Ca ital ~Char es. Capital charges general'ly include the costs incurred from property taxes, insurance premiums on plant facilities and other.... Summary of field results of SO flyash conditioning. 5. Sulfur conditioning of flyash 6. Sodium conditioning of flyash 7. Gallatin steam plant economic data 8. Precipitator related costs, 1960 to 1969 26 27 29 35 36 9. Overall costs...

  18. KU Today, November 2, 2012

    E-Print Network [OSTI]

    PUBLIC EVENT 35th anniverary of the University Ombuds Office Friday, Nov. 2, 2012 3 p.m.-5 p.m. Kansas Union Malott Room View all events TWITTER @kunews Jayhawk fan in New Jersey helps those without power recharge and reconnect after #Sandy...: http://ow.ly/eXc22 View all tweets FEATURED MULTIMEDIA KU ON FLICKR Ecology and evolutionary biology research More: photos | videos KU IN THE NEWS Connected World Magazine (November- December 2012) Turning research into reality...

  19. Deep SAURON Spectral-Imaging of the diffuse Lyman-alpha halo LAB1 in SSA22

    E-Print Network [OSTI]

    Richard Bower; S. L. Morris; R. Bacon; R. J. Wilman; M. Sullivan; S. C. Chapman; R. L. Davies; P. T. de Zeeuw; E. Emsellem

    2004-02-19

    We have used the SAURON panoramic integral field spectrograph to study the structure of the Ly-alpha emission-line halo, LAB1, surrounding the sub-millimeter galaxy SMM J221726+0013. This emission-line halo was discovered during a narrow-band imaging survey of the z=3.1 large-scale structure in the SSA22 region. Our observations trace the emission halo out to almost 100 kpc from the sub-millimeter source and identify two distinct Ly-alpha `mini-haloes' around the nearby Lyman-break galaxies. The main emission region has a broad line profile, with variations in the line profile seeming chaotic and lacking evidence for a coherent velocity structure. The data also suggests that Ly-alpha emission is suppressed around the sub-mm source. Interpretation of the line structure needs care because Ly-alpha may be resonantly scattered, leading to complex radiative transfer effects, and we suggest that the suppression in this region arises because of such effects. We compare the structure of the central emission-line halo with local counter-parts, and find that the emission line halo around NGC 1275 in the Perseus cluster may be a good local analogue, although the high redshift halo is factor of ~100 more luminous and appears to have higher velocity broadening. Around the Lyman-break galaxy C15, the emission line is narrower, and a clear shear in the emission wavelength is seen. A plausible explanation for the line profile is that the emission gas is expelled from C15 in a bipolar outflow, similar to that seen in M82.

  20. Introduction As humans, we are naturally endowed with multimodal input/output

    E-Print Network [OSTI]

    Thórisson, Kristinn Rúnar

    content. A B GAZE: SPEECH: NODS: GAZE: SPEECH: NODS: NOD t a b c d 400 ms 750 ms 150 ms 600 ms 1.4 sec e app(h)are(h)nt (h)ly? Yeah right, NOD NOD NOD NOD NOD NOD FIGURE 1-1. Transcript spanning 3 seconds of a typical two- person conversation, showing the timing of speech, gaze and head nods for each conversant

  1. Oceanography Vol. 19, No. 1, Mar. 2006152 R E G U L A R I S SU E F E AT U R E

    E-Print Network [OSTI]

    Rhode Island, University of

    Oceanography Vol. 19, No. 1, Mar. 2006152 R E G U L A R I S SU E F E AT U R E BY J A M E S A . YO D E R A N D M AU R E E N A . K E N N E L LY Almost 20 years ago, Oceanography published a short for oceanography". That remark has certainly proved to be accurate, and imagery from CZCS, OCTS (Ocean Color

  2. Drill press "*il:J",,",,",tdont cone wrth bit stdAe? t(I

    E-Print Network [OSTI]

    Oh, Paul

    Drill press "*il:J",,",,",tdont cone wrth bit stdAe? t(I N'trkeyour own Ptrotng racK fron scrapwoodandPutdrill bits, sandingdrums' hole sawsand countersmKs right at your nnger- dps.Hete'show: drilling8 the desiSn of this laluable drill Press N'* II "MeetmY new butler '\\-clffFs rHE F^M|LY(^NDYMAN MAY

  3. Statistical and risk analysis for the measured and predicted axial response of 100 piles 

    E-Print Network [OSTI]

    Perdomo, Dario

    1986-01-01

    . , Universidad de los Andes Chairman of Advisory Committee: Dr. Jean-Louis Briaud A statistical analysis of the ultimate load and load-settlement results obtained by Briaud et al(1985) was performed . A risk analy- sis method was also developed to study... the importance of properly selecting safety factors. The data base of 100 piles was statistical- ly analyzed under five different soil categories, and several predic- tion methods were used to study the performance of the risk analysis method. In general...

  4. High Gradient Acceleration in a 17 GHz Photocathode RF Gun* S. C. Chen, J. Gonichon, 1;. C-L. Lin, R. J. Temkin, S. Trotz, B. G. Danly, and J. S. Wurtele

    E-Print Network [OSTI]

    Wurtele, Jonathan

    High Gradient Acceleration in a 17 GHz Photocathode RF Gun* S. C. Chen, J. Gonichon, 1;. C-L. Lin.icle acceleration at high mi- ccowave (RF) frequencies are under study at hIIT. The 17 GHz photocathode RF gun has, efforts have been made recent,ly t,o creat,e novel electron beam sources.[l] While existing RF guns

  5. www.activemotif.comwww.activemotif.com Protein Purification

    E-Print Network [OSTI]

    Lebendiker, Mario

    Storage Resuspension Buffer 45 ml 175 ml Room Temp. Buffer A 33 ml 125 ml Room Temp. Elution Buffer 11 ml. Resuspension Buffer 50 mM Tris, pH 8.0, 300 mM NaCl, and 10 mM Imidazole, 0.2% Triton X-100 2. Lysozyme 100 mg concentration of 0.2% to the Resuspension Buffer. This will help the ly

  6. Gossypol content of industrial cotton dust: evaluation and application of the Gossypol - Aniline complex method 

    E-Print Network [OSTI]

    Gruenwald, Guillermo Jose Samuel

    1974-01-01

    , The lay terms used in the early days of the recognition of this disease include: "mill fever ", "weavers cough". "weaver. s a. , thma", 'cotton dust disease", "brown ung", "Noonday morning fever", etc. 17 Byssinosis symptoms may be noted after... cough incessantly and by degrees brings on asthmatic troubles. ? The American researcher, Winslow, aghast , 5 mill conditions t n the ear ly '1900's noted the hazards o "the carding room" with the clouds of f ine chokihg dust. " 5 6 Later...

  7. Jan, 17 By D r , Sl;arles F, Rroolss of Clark University.

    E-Print Network [OSTI]

    NO& 527 Jan, 17 By D r , Sl;arles F, Rroolss of Clark University. CITY FOGS--- Cities a r e especially l i s b l e t o enciuring fogs iii .n.inter, Xhile i n the country a fog corns and goes uswlly i n: fOgLy thca s i t e s l e s s dcsirsble froin other standpoints, pecially on fog.? days, which

  8. THE VALUE OF THE RAMSEY NUMBER R(3, 8) Brendan D. McKay

    E-Print Network [OSTI]

    McKay, Brendan

    , then NG (v) d* *enotes the set of neighbours of v in G, and N~G(v) denotes VG - NG (v) - {v}. If W in G of the vertices in ~NG(v). Then, clear* *ly ffi(n-ffi-1) D (t - 1)(n - ffi - 1). Similarly, if E is the number of edges in G between * *NG (v) and N~G(v), then ffi(ffi - 1) E ffi(t - 2

  9. Broiler Production. 

    E-Print Network [OSTI]

    Cawley, W. O.; Wormeli, B. C.; Quisenberry, J. H.

    1962-01-01

    plastic curtains which close and open easily when weather varies are helpful in providing comfortable temperatures for the birds. A damper is needed so that ridge ventilatm can be dosed easily during ooM weather. inclement weather. However, poultry... housing costs should be kept within a range whereby earnings can justify the investment. Location Orient the house with the long axis run- ning east and west to prevent the early morn- ing or late afternoon sun from shining direct- ly into it...

  10. Use of Thermal Energy Storage to Enhance the Recovery and Utilization of Industrial Waste Heat 

    E-Print Network [OSTI]

    McChesney, H. R.; Bass, R. W.; Landerman, A. M.; Obee, T. N.; Sgamboti, C. T.

    1982-01-01

    in Table 2. Generalized source media included combustion gases at various temperatures from oil/gas fired furnaces, kilns, etc., condensing vapors and various liquid steams at 200 D F (90?C) or below. Generalized sink processes/media included process... applications). Potential fuel energy savings for industry level applications are pre sented in Table 7 and are derived from industry cross-correlation data similar to that shown in Table 2. Intra-industry level energy savings were used subsequent ly...

  11. Thermodynamic and transport properties of self-assembled monolayers from molecular simulations 

    E-Print Network [OSTI]

    Aydogmus, Turkan

    2006-04-12

    ). ................................................................................................50 4.2 Pore size distribution of membranes as-received from manufacturer.120........ 52 4.3 Propane diffusivity as a function of the box lengths (Lx,Ly(? ))..................... 58 4.4 Propane/nitrogen selectivity as a function of propane...12 chains and diamonds represent membranes treated with C18 chains from Javaid et al.1............................................................................................66 4.6 Propane/nitrogen selectivity as a function of propane permeance...

  12. Occasional Papers in Sociology and Anthropology - Volume 5

    E-Print Network [OSTI]

    Central Department of Sociology and Anthropology, Tribhuvan University, Kathmandu, Nepal

    1996-01-01

    t' S/"di~J ill ~" Ilt/ r ill.Jie Ttll."",ily.ft ,,,,d ' htorn i.

  13. Kh trng khn cp nc ung Trong nhng thi k ri ren, cc s y t a phng c th khuyn co ngi dn dng nc thn

    E-Print Network [OSTI]

    nc cho gia ình bn, bn vn có th tìm c s lng gii hn dùng bng cách ly nc ra t bình nc nóng, hay là tan nc ni ó. Thuc kh trùng ít hiu nghim nu nc c. Cn phi lc nc c qua nhng khn sch hoc yên cho lng xung, và không b r sét. Có hai phng pháp kh trùng thông dng và hiu qu nu lng nc ít. Phng pháp th nht là Ðun

  14. Thiamin supplementation for exercising horses 

    E-Print Network [OSTI]

    Topliff, Donald Ray

    1981-01-01

    was represented. Chromic oxide was used as an external indicator to determine total fecal output. At iv the end of each experimental period horses were subjected to an exercise tolerance test on an equine treadmill. Heart and respiration rates and blood... not significant- ly affected by treatment at any measured interval throughout the experiment. Mean blood thiamin levels were lower (P&, 05) at rest in horses after treatment I as compared to treatment II but treatment III was indistinguishable from either...

  15. Nutritional Value of Range Plants in Edwards Plateau Region of Texas. 

    E-Print Network [OSTI]

    Huston, J.E.; Rector, B.S.; Merrill, L.B.; Engdahl, B.S.

    1981-01-01

    .S. Rector, L.B. Merrill, and B.S. Engdahl* The Edwards Plateau region of Texas comprises .about 24 million acres of mostly rough terrain, well suitkd for production of cattle, sheep, and goats. The region also supports large populations of deer, tur..., re- spectively, with no distinct boundary. Soils are most- ly calcareous clays and clay loams derived from lime- stone, with the exception of one fairly large area, the Central Basin, which is typified by sandy, granitic soils. Average annual...

  16. 3. The PEP II Storage Rings and Their Impact on the BABAR Detector

    E-Print Network [OSTI]

    , the energies of the two beams, and the position, angles, and size of the luminous region. #12; 11 3­II is an e + e - storage ring system designed to operate at a center of mass (c.m.) energy of 10.58 Ge in the first year. HER and LER refer to the high energy e - and low energy e + ring, respec­ tively. #Lx , # Ly

  17. Refine your search Select options from the menu on the left hand

    E-Print Network [OSTI]

    Yener, Aylin

    ://psu.summon.serialssolutions.comhttp://psu.summon.serialssolutions.com F I N A L LY : RESEARCH AS EASYAS 1-2-3 #12;1 Enter search term into search box. 2 Refine results relevant articles were published in that year. Include or Exclude subject terms from your searchRefine your search Select options from the menu on the left hand side of the results screen

  18. SUMMER SCHOOL ON MATHEMATICAL PHYSICS, ANALYSIS

    E-Print Network [OSTI]

    Heermann, Dieter W.

    SUMMER SCHOOL ON MATHEMATICAL PHYSICS, ANALYSIS AND STOCHASTICS ORgaNiSatiON: M. SaLMHOfER (HEid at the border between mathematical physics, analysis and stochastics. there will be two lecture seriesHEOREtiCaL pHySiCS JuLY 21­26, 2014 SELf-avOidiNg WaLK iN fOUR diMENSiONS Lecturers: Roland Bauerschmidt, ia

  19. Socialism and Individualism

    E-Print Network [OSTI]

    Dunn, Denton

    1887-01-01

    ^L£,^Y J~£ y^Y^UiMy (U Uy\\yyC^ 4Y^^4YF (y& JUL* ^ ftcocr put z^&rzC - / ^n^y J^ur-, T^n^^u^t^ <( ALA- lOt/ QivuL ot #JL %u Cks OSlS A^r-r1^A y/" -t^U^yf HI v.- ' usi/y&u^' y...

  20. The moral content in the dramas of Philip Massinger 

    E-Print Network [OSTI]

    Krienke, Marion Douglas

    1965-01-01

    , icism of Nassinger and the other "old dramatist. s" besides Shakespeare cannot be said to begin before the eax'ly nineteenth century. Though Coleridge admits that, Nassingex' is always entertaining, that, his plays have the interest, of a novel, bis... ~ NASSINGER~S SOCIAL l'1GRALITY . ~ . . . ~ 62 V ~ CONCLUSION ~ ~ ~ ~ e ~ e ~ ~ s ~ ~ e ~ ~ 86 A SELECTED BIBLIOGRAPHY ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ o ~ 8$ CHAPTER I INTRODUCTION k frequently repeated complaint by biographers of Philip Nassinger is that vexy...

  1. Connection Between the Circumgalactic Medium and the Interstellar Medium of Galaxies:Results from the COS-GASS Survey

    E-Print Network [OSTI]

    Borthakur, Sanchayeeta; Tumlinson, Jason; Bordoloi, Rongmon; Thom, Christopher; Catinella, Barbara; Schiminovich, David; Dave, Romeel; Kauffmann, Guinevere; Moran, Sean M; Saintonge, Amelie

    2015-01-01

    We present a study exploring the nature and properties of the Circum-Galactic Medium (CGM) and its connection to the atomic gas content in the interstellar medium (ISM) of galaxies as traced by the HI 21 cm line. Our sample includes 45 low-z (0.026-0.049) galaxies from the GALEX Arecibo SDSS Survey. Their CGM was probed via absorption in the spectra of background Quasi-Stellar Objects at impact parameters of 63 to 231 kpc. The spectra were obtained with the Cosmic Origins Spectrograph aboard the Hubble Space Telescope. We detected neutral hydrogen (Ly{\\alpha} absorption-lines) in the CGM of 92% of the galaxies. We find the radial profile of the CGM as traced by the Ly{\\alpha} equivalent width can be fit as an exponential with a scale length of about 0.85 times the virial radius of the dark matter halo. We found no correlation between the orientation of the galaxies and their Ly{\\alpha} equivalent widths. The velocity spread of the circumgalactic gas is consistent with that seen in the atomic gas in the inters...

  2. Mechanism and computational model for Lyman-{alpha}-radiation generation by high-intensity-laser four-wave mixing in Kr-Ar gas

    SciTech Connect (OSTI)

    Louchev, Oleg A.; Saito, Norihito; Wada, Satoshi; Bakule, Pavel; Yokoyama, Koji; Ishida, Katsuhiko; Iwasaki, Masahiko

    2011-09-15

    We present a theoretical model combined with a computational study of a laser four-wave mixing process under optical discharge in which the non-steady-state four-wave amplitude equations are integrated with the kinetic equations of initial optical discharge and electron avalanche ionization in Kr-Ar gas. The model is validated by earlier experimental data showing strong inhibition of the generation of pulsed, tunable Lyman-{alpha} (Ly-{alpha}) radiation when using sum-difference frequency mixing of 212.6 nm and tunable infrared radiation (820-850 nm). The rigorous computational approach to the problem reveals the possibility and mechanism of strong auto-oscillations in sum-difference resonant Ly-{alpha} generation due to the combined effect of (i) 212.6-nm (2+1)-photon ionization producing initial electrons, followed by (ii) the electron avalanche dominated by 843-nm radiation, and (iii) the final breakdown of the phase matching condition. The model shows that the final efficiency of Ly-{alpha} radiation generation can achieve a value of {approx}5x10{sup -4} which is restricted by the total combined absorption of the fundamental and generated radiation.

  3. A LYMAN BREAK GALAXY IN THE EPOCH OF REIONIZATION FROM HUBBLE SPACE TELESCOPE GRISM SPECTROSCOPY

    SciTech Connect (OSTI)

    Rhoads, James E.; Malhotra, Sangeeta; Cohen, Seth; Zheng Zhenya; Stern, Daniel; Dickinson, Mark; Pirzkal, Norbert; Grogin, Norman; Koekemoer, Anton; Peth, Michael A.; Spinrad, Hyron; Reddy, Naveen; Hathi, Nimish; Budavari, Tamas; Ferreras, Ignacio; Gardner, Jonathan P.; Gronwall, Caryl; Haiman, Zoltan; Kuemmel, Martin; Meurer, Gerhardt; and others

    2013-08-10

    We present observations of a luminous galaxy at z = 6.573-the end of the reionization epoch-which has been spectroscopically confirmed twice. The first spectroscopic confirmation comes from slitless Hubble Space Telescope Advanced Camera for Surveys grism spectra from the PEARS survey (Probing Evolution And Reionization Spectroscopically), which show a dramatic continuum break in the spectrum at rest frame 1216 A. The second confirmation is done with Keck + DEIMOS. The continuum is not clearly detected with ground-based spectra, but high wavelength resolution enables the Ly{alpha} emission line profile to be determined. We compare the line profile to composite line profiles at z = 4.5. The Ly{alpha} line profile shows no signature of a damping wing attenuation, confirming that the intergalactic gas is ionized at z = 6.57. Spectra of Lyman breaks at yet higher redshifts will be possible using comparably deep observations with IR-sensitive grisms, even at redshifts where Ly{alpha} is too attenuated by the neutral intergalactic medium to be detectable using traditional spectroscopy from the ground.

  4. Sub-mm imaging of a proto-cluster region at z=3.09

    E-Print Network [OSTI]

    S. C. Chapman; G. F. Lewis; D. Scott; E. Richards; C. Borys; C. C. Steidel; K. L. Adelberger; A. E. Shapley

    2000-10-04

    We have used the Submillimetre Common-User Bolometer Array (SCUBA) detector on the James Clerk Maxwell Telescope (JCMT) to measure bright sub-mm emission associated with a recently discovered extensive (>100/h kpc) and highly luminous, `blob' of Ly-alpha emission at z=3.09. The blob lies within a known large overdensity of optical sources in the z=3.07-3.11 range, and is centered on a locally overdense peak within this region. The best explanation for the copious sub-mm emission is a dust obscured continuum source, which may produce the ionizing flux for the Ly-alpha cloud. Cooling gas explanations are plausible but excessively complicated, and the 450/850 micron ratio rules out a significant fraction of the signal arising from the Sunyaev-Zel'dovich increment. At least two additional ~10 mJy sub-mm detections in the SCUBA map, with a surface density significantly higher than in blank field surveys, suggests that they may be associated with the z=3.09 structure. A SCUBA `photometry' observation of a second nearby Ly-alpha blob tentatively detects a weaker sub-mm counterpart.

  5. Study on proliferative responses to host Ia antigens in allogeneic bone marrow chimera in mice: sequential analysis of the reactivity and characterization of the cells involved in the responses

    SciTech Connect (OSTI)

    Iwabuchi, K.; Ogasawara, K.; Ogasawara, M.; Yasumizu, R.; Noguchi, M.; Geng, L.; Fujita, M.; Good, R.A.; Onoe, K.

    1987-01-01

    Irradiation bone marrow chimeras were established by reconstitution of lethally irradiated AKR mice with C57BL/10 marrow cells to permit serial analysis of the developing reactivities of lymphocytes from such chimeras, (B10----AKR), against donor, host, or third party antigens. We found that substantial proliferative responses to Ia antigens of the recipient strain and also to third party antigens were generated by the thymocytes obtained from the irradiation chimeras at an early stage after bone marrow reconstitution. The majority of the responding thymocytes had surfaces lacking demonstrable peanut agglutinin receptors and were donor type Thy-1+, Ly-2-, and L3T4+ in both anti-recipient and anti-third party MLR. In anti-host responses, however, Ly-2+ thymocytes seemed to be at least partially involved. This capacity of thymus cells to mount a response to antigens of the recipient strain declined shortly thereafter, whereas the capacity to mount MLR against third party antigens persisted. The spleen cells of (B10----AKR) chimeras at the same time developed a more durable capability to exhibit anti-host reactivities and a permanent capability of reacting to third party allo-antigens. The stimulator antigens were Ia molecules on the stimulator cells in both anti-recipient and anti-third party MLR. The responding splenocytes were of donor origin and most of them had Thy-1+, Ly-1+2-, and L3T4+ phenotype.

  6. The D/H ratio at z = 3.57 toward Q 1937-1009

    E-Print Network [OSTI]

    Sergei A. Levshakov; Wilhelm H. Kegel; Fumio Takahara

    1998-02-10

    Deuterium abundance re-measurements by Burles and Tytler (1998; hereafter BT) yielded D/H = (3.3 +/- 0.3) 10^{-5} and the robust upper limit D/H < 3.9 10^{-5} from the z_a = 3.572 system toward Q1937-1009. In this new analysis BT adopted multicomponent microturbulent models together with the possibility to vary freely the local continuum level around each HI line to improve the fit. The procedure failed, however, to fit adequately D Ly-beta without recourse to an additional H Ly-alpha contamination at the position of D Ly-beta. We show that this obstacle may be successfully overcome within the framework of the mesoturbulent model accounting (in contrast to the microturbulent approximation) for a correlated structure of the large scale velocity field. Using the same observational data and the original continuum as determined by Tytler et al. (1996), we obtained good fits. The one-component mesoturbulent models provide D/H in the range (3.2 - 4.8) 10^{-5} and the total hydrogen column density N(HI) = (5.6 - 7.0) 10^{17} cm^{-2}. This result is consistent with that found by us from the z_a = 2.504 and z_a = 0.701 systems toward Q1009+2956 and Q1718+4807, respectively. The range for D/H common to all three analyses is D/H = (4.1 - 4.6) 10^{-5}. This value is consistent with standard big bang nucleosynthesis [SBBN] if the baryon-to-photon ratio, \\eta, is in the range 4.2 10^{-10} <= \\eta <= 4.6 10^{-10}, implying 0.0155 <= \\Omega_b h^2_{100} <= 0.0167.

  7. PROBING THE SOLAR WIND ACCELERATION REGION WITH THE SUN-GRAZING COMET C/2002 S2

    SciTech Connect (OSTI)

    Giordano, S.; Raymond, J. C.; Lamy, P.; Uzzo, M.; Dobrzycka, D.

    2015-01-01

    Comet C/2002 S2, a member of the Kreutz family of sungrazing comets, was discovered in white-light images of the Large Angle and Spectromeric Coronagraph Experiment coronagraph on the Solar and Heliospheric Observatory (SOHO) on 2002 September 18 and observed in H I Ly? emission by the SOHO Ultraviolet Coronagraph Spectrometer (UVCS) instrument at four different heights as it approached the Sun. The H I Ly? line profiles detected by UVCS are analyzed to determine the spectral parameters: line intensity, width, and Doppler shift with respect to the coronal background. Two-dimensional comet images of these parameters are reconstructed at the different heights. A novel aspect of the observations of this sungrazing comet data is that, whereas the emission from most of the tail is blueshifted, that along one edge of the tail is redshifted. We attribute these shifts to a combination of solar wind speed and interaction with the magnetic field. In order to use the comet to probe the density, temperature, and speed of the corona and solar wind through which it passes, as well as to determine the outgassing rate of the comet, we develop a Monte Carlo simulation of the H I Ly? emission of a comet moving through a coronal plasma. From the outgassing rate, we estimate a nucleus diameter of about 9 m. This rate steadily increases as the comet approaches the Sun, while the optical brightness decreases by more than a factor of 10 and suddenly recovers. This indicates that the optical brightness is determined by the lifetimes of the grains, sodium atoms, and molecules produced by the comet.

  8. Keck spectroscopy of gravitationally lensed z ? 4 galaxies: Improved constraints on the escape fraction of ionizing photons

    SciTech Connect (OSTI)

    Jones, Tucker A. [Department of Physics, University of California, Santa Barbara, CA 93106 (United States); Ellis, Richard S.; Schenker, Matthew A. [Department of Astrophysics, California Institute of Technology, MS 249-17, Pasadena, CA 91125 (United States); Stark, Daniel P. [Department of Astronomy and Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States)

    2013-12-10

    The fraction of ionizing photons that escape from young star-forming galaxies is one of the largest uncertainties in determining the role of galaxies in cosmic reionization. Yet traditional techniques for measuring this fraction are inapplicable at the redshifts of interest due to foreground screening by the Ly? forest. In an earlier study, we demonstrated a reduction in the equivalent width of low-ionization absorption lines in composite spectra of Lyman break galaxies at z ? 4 compared to similar measures at z ? 3. This might imply a lower covering fraction of neutral gas and hence an increase with redshift in the escape fraction of ionizing photons. However, our spectral resolution was inadequate to differentiate between several alternative explanations, including changes with redshift in the outflow kinematics. Here we present higher quality spectra of three gravitationally lensed Lyman break galaxies at z ? 4 with a spectral resolution sufficient to break this degeneracy of interpretation. We present a method for deriving the covering fraction of low-ionization gas as a function of outflow velocity and compare the results with similar quality data taken for galaxies at lower redshift. We find an interesting but tentative trend of lower covering fractions of low-ionization gas for galaxies with strong Ly? emission. In combination with the demographic trends of Ly? emission with redshift from our earlier work, our results provide new evidence for a reduction in the average H I covering fraction, and hence an increase in the escape fraction of ionizing radiation from Lyman break galaxies, with redshift.

  9. Camptothecin inhibits platelet-derived growth factor-BB-induced proliferation of rat aortic vascular smooth muscle cells through inhibition of PI3K/Akt signaling pathway

    SciTech Connect (OSTI)

    Park, Eun-Seok [Department of Applied Biochemistry, Division of Life Science, College of Health and Biomedical Science, Konkuk University, Chungju, Chungbuk (Korea, Republic of); Kang, Shin-il [College of Pharmacy Medical Research Center, Chungbuk National University, Cheongju (Korea, Republic of); Yoo, Kyu-dong [Hazardous Substances Analysis Division, Gwangju Regional Food and Drug Administration, Gwangju (Korea, Republic of); Lee, Mi-Yea [Department of Nursing Kyungbok University, Pocheon (Korea, Republic of); Yoo, Hwan-Soo; Hong, Jin-Tae [College of Pharmacy Medical Research Center, Chungbuk National University, Cheongju (Korea, Republic of); Shin, Hwa-Sup [Department of Applied Biochemistry, Division of Life Science, College of Health and Biomedical Science, Konkuk University, Chungju, Chungbuk (Korea, Republic of); Kim, Bokyung [Department of Physiology, Konkuk Medical School, Konkuk University, Chungju, Chungbuk (Korea, Republic of); Yun, Yeo-Pyo, E-mail: ypyun@chungbuk.ac.kr [College of Pharmacy Medical Research Center, Chungbuk National University, Cheongju (Korea, Republic of)

    2013-04-15

    The abnormal proliferation of vascular smooth muscle cells (VSMCs) in arterial wall is a major cause of vascular disorders such as atherosclerosis and restenosis after angioplasty. In this study, we investigated not only the inhibitory effects of camptothecin (CPT) on PDGF-BB-induced VSMC proliferation, but also its molecular mechanism of this inhibition. CPT significantly inhibited proliferation with IC50 value of 0.58 ?M and the DNA synthesis of PDGF-BB-stimulated VSMCs in a dose-dependent manner (0.5–2 ?M ) without any cytotoxicity. CPT induced the cell cycle arrest at G0/G1 phase. Also, CPT decreased the expressions of G0/G1-specific regulatory proteins including cyclin-dependent kinase (CDK)2, cyclin D1 and PCNA in PDGF-BB-stimulated VSMCs. Pre-incubation of VSMCs with CPT significantly inhibited PDGF-BB-induced Akt activation, whereas CPT did not affect PDGF-receptor beta phosphorylation, extracellular signal-regulated kinase (ERK) 1/2 phosphorylation and phospholipase C (PLC)-?1 phosphorylation in PDGF-BB signaling pathway. Our data showed that CPT pre-treatment inhibited VSMC proliferation, and that the inhibitory effect of CPT was enhanced by LY294002, a PI3K inhibitor, on PDGF-BB-induced VSMC proliferation. In addition, inhibiting the PI3K/Akt pathway by LY294002 significantly enhanced the suppression of PCNA expression and Akt activation by CPT. These results suggest that the anti-proliferative activity of CPT is mediated in part by downregulating the PI3K/Akt signaling pathway. - Highlights: ? CPT inhibits proliferation of PDGF-BB-induced VSMC without cytotoxicity. ? CPT arrests the cell cycle in G0/G1 phase by downregulation of cyclin D1 and CDK2. ? CPT significantly attenuates Akt phosphorylation in PDGF-BB signaling pathway. ? LY294002 enhanced the inhibitory effect of CPT on VSMC proliferation. ? Thus, CPT is mediated by downregulating the PI3K/Akt signaling pathway.

  10. Spectral Evidence for Widespread Galaxy Outflows at z>4

    E-Print Network [OSTI]

    Brenda Frye; Tom Broadhurst; Narciso Benitez

    2001-12-04

    We present discovery spectra of a sample of eight lensed galaxies at high redshift, 3.7Ly-alpha emission. A correlation is found between this blueshift and the equivalent width of the metal lines, which we interpret as a broadening of saturated absorption lines caused by a dispersion in the outflow velocity of interstellar gas. Local starburst galaxies show similar behavior, associated with obvious gas outflows. We also find a trend of increasing equivalent width of Ly-alpha emission with redshift, which may be a genuine evolutionary effect towards younger stellar populations at high redshift with less developed stellar continua. No obvious emission is detected below the Lyman limit in any of our spectra, nor in deep U or B-band images. The UV continua are reproduced well by early B-stars, although some dust absorption would allow a fit to hotter stars. After correcting for the lensing, we derive small physical sizes for our objects, ~0.5-5 kpc/h for a flat cosmology with Omega_m=0.3, Omega_Lambda=0.7. The lensed images are only marginally resolved in good seeing despite their close proximity to the critical curve, where large arcs are visible and hence high magnifications of up to ~20x are inferred. Two objects show a clear spatial extension of the Ly-alpha emission relative to the continuum starlight, indicating a ``breakout'' of the gas. The sizes of our galaxies together with their large gas motion suggests that outflows of gas are common at high redshift and associated with galaxy formation.

  11. Facility Automation Products--Systems--Applications--Trends 

    E-Print Network [OSTI]

    Bynum, H. D.

    1986-01-01

    PRODUCTS ?? SYSTEMS ?? APPLICATIONS ?? TRENDS Harris D. Bynum Honeywell Inc. Atlanta, Georgia INDUSTRIAL YEAR QUANTITY PeRCENT TOTAL 1974 30.83 42.3 72.48 1975 28.34 40.2 70.49 1978 30.18 40.8 74.30 1977 31.02 40.7 78.21 1978 31.38 40.2 78... such as thermal storage and cogeneration are being more frequent ly used. Energy management control strategies required for the energy systems are more effective when the global facility digital system communication network and global data base...

  12. Using Hybrid Vigor to Improve Production Efficiency in Beef Cattle. 

    E-Print Network [OSTI]

    Maddox, L. A. Jr.

    1972-01-01

    cousins for example) are mated, the resulting cXcprlnq IS inbred. The inbreeding intensity depends on closeness of the sire and dam's relationship. Loss of 1 cjor +017ds to be proportional to the inbreeding inten- s'v, blating individuals genetically... it is difficult to ' '2ly separate the hybrid benefit from the dam's ~g ability and calf's own ability. In order to effective1 y study crossbreeding programs, one needs sufficient information to determine the amount of change expected in the following...

  13. Separation of 23 Cynodon turf-type cultivars using electrophoretic banding patterns 

    E-Print Network [OSTI]

    Vermeulen, Paul Henri

    1988-01-01

    , are also subject to varying cond1t1ons, but such occurrences are less likely and can be eas1ly observed. Electrophoresis is a process whereby charged particles, such as proteins, can be separated by an electrical f1eld in a porous gel. Current el... or tf p td 11ght. Th p 1 d c 1tf f ~Ati were distinguished by N1ttler and Kenney (1969) by morphological responses to continuous 11ght. Within five weeks significant d1fferences in leaf size and stem diameter were observed. Cultivars of Festuca rubra...

  14. An alternative robustness measure with applications 

    E-Print Network [OSTI]

    Kellison, Floyd Wesley

    1990-01-01

    measures differ by as much as a factor of 5. 7. 27 Table II. Robustness Measures For Various (Ly Ls) Pairs p(z) z gg censored at Lr Lg g(z) = z: censored at L, Lr 1. 000 . 5465 1. 100 . 5441 1. 200 . 5431 1. 300 . 5432 1. 400 . 5439 1. 500... corresponding to this distribution. In particular, a popular distribution-free estimator which draws inspiration from laws of large numbers is obtained by choosing g(z) = z for sll z E B. However, the performance of this estimator can depend on the underlying...

  15. Analysing ZigBee Key Establishment Protocols

    E-Print Network [OSTI]

    Yüksel, Ender

    2012-01-01

    In this report, we present our approach for protocol analysis together with a real example where we find an important flow in a contemporary wireless sensor network security protocol. We start by modelling protocols using a specific process algebraic formalism called LySa process calculus. We then apply an analysis based on a special program analysis technique called control flow analysis. We apply this technique to the ZigBee-2007 End-to-End Application Key Establishment Protocol and with the help of the analysis discover an unknown flaw. Finally we suggest a fix for the protocol, and verify that the fix works by using the same technique.

  16. Miscellaneous Analyses. 

    E-Print Network [OSTI]

    Adriance, Duncan; Tilson, P. S.; Harrington, H. H.

    1895-01-01

    . Mineral Water Analyses? Table 1. Reported in grains to imperial gallon. R oc k d al e, s p ri n gs . M ar li n , ar te si an . B el to n , ar te si an . W ax ah ac h ie , ar te si an . St af fo rd , sp ri... and artesian water, as w ell as in some o f the rivers, that we g lad ly turn to a pure water even for irrigation . This statem ent applies Only to tlie mineral ingred ients; w hatever n itrogenous or organ ic material is present must be considered...

  17. The glass beakers of the eleventh-century Serc?e Limani shipwreck: a preliminary study 

    E-Print Network [OSTI]

    Kitson-MimMack, Joy Joan

    1988-01-01

    and composed of deep shades. And las+ly, despite 'ooth vessel shapes having engraved examples, the design themes on short cylinders are significantly 'ess varied than those on truncated cones. The beaker is one of the most ancient forms of drinking vessels... and Classification to the Sixteenth Century New York 1927 2 vole. L'E o ue romaine Musee d'Histoire et d' Art, La Verrerie de 1' ' 66 * 1 6~1969 Ettinghausen R. Ettinghausen, "The 'Beveled Style' in the Post-Samarra Period, " in George C. Miles, ed...

  18. The Production of Active Nitrogen in the Soil. 

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1908-01-01

    , then these were incorporated with the dry soil, the water added and the whole mixed thoroughly until the mass was uniform. The mixture was then placed in 500 cc precipitating jars, shaking it down by tapping gently against a wooden block. A test tube, with a... small perforation in the end, was inserted to a depth of about one inch, and the jar, with its contents, was weighed and placed in a water bath kept as near- ly as possible at 35 degrees C. The most satisfactory method' of marking the jar with its...

  19. Economic Comparisons of Alternatives for Improving Honey Mesquite-Infested Rangeland. 

    E-Print Network [OSTI]

    Whitson, R.E.; Scifres C.J.

    1980-01-01

    impact of that variation was beyond the scope of t h i s study. ?he general response curve of Workman, Tefer t i l ler and Leinweber (1965) (Figure 2) fo r aer ia l spraying of honey mesquite was adopted for t h i s study. This response curve... t o the estinated 20-year average carrying capacity fo r the treatment. (b) The length of time between retreatments was increased i n longevity ( f o r example, the increase was 1 year i n the case of aer ia l ly spraying with 2,4,5-T) t o...

  20. An analysis of processing methods and a comparison of operational efficiencies in ten Texas broiler processing plants 

    E-Print Network [OSTI]

    Gardner, Frederick Albert

    1955-01-01

    of workers used to perform the Job, In ylant C 2, g man equivalents were used to feed and water broilers, In plant D i8 man equivalents were used. Productivity in these two plants ranged from 1200 in plant C to 19/0 in ylant D. Xn plant J no labox.... OnIy two plants, F and H, felt that it was accessary to assign one man to supervise the reccivin?" operation. Genera'ly, the vorker assigned to supervise the receiving operation vas also given other Jobs to perform. PART XI DREGS XHG...

  1. Public Speaking 4-H Style 

    E-Print Network [OSTI]

    Hall, Gayle

    1999-12-03

    to have your meal served after you speak. If not, eat and drink light- ly during the meal. Microphone Tips A microphone can be your best aid or your worst enemy. A mike does not guarantee quality. Do not use a mike unless it is necessary. When you boost... your voice naturally, you also increase your energy level. Vocal ?pumping? to project to the back row or to the most distant corner is what makes a speaker feel stronger and more in charge. If you choose to use a mike, adjust it to your height...

  2. The adiabatic adsorption-desorption characteristics of silica gel beds 

    E-Print Network [OSTI]

    Barker, James Marshall

    1979-01-01

    -desorpt1on characteristics of silica gel beds are i nvest1gated . The mathematical equations that descry 1 be desiccant bed behav1or are formulated and solved numer1cally us1ng f1nite difference methods. The equat1ons are derived such that both... of the finite d1fference program. The functional relationships are sufficiently accurate for most design purposes, and are r ead1 ly adaptable for use 1 n parametric studies of desiccant air condi t1 on1ng systems . DEDICATION Dedicated to My Parents...

  3. Investigations on the cause of electrocardiogram changes during dehydration 

    E-Print Network [OSTI]

    Clark, Donald Ray

    1966-01-01

    ' sodium and increase of. potassium. The published EKG records also re~ealed an increase in the QRS voltage. l. onger survival of the 1000 R group resulted in development of a marked hyperpotassemia with a lowering of P waves and reversal of 'I' waves... described plasma potassium increases after high x-ray doses in dogs (1400-2S00 R) , :nd rabbit, s (HSO R), respe~ 's v~ ly. In other radiation xperiments ' animals 1'ailcd to develop hyperkalemia after exposure. The report of Caster et al. described...

  4. Sidney W. Bijou: The Illinois Years, 1965–1975

    E-Print Network [OSTI]

    Morris, Edward K.

    2008-09-01

    of the Institute for Research on Exceptional Children (IREC) was Sam Kirk, whose PhD was in experimental psychology from the University of Michigan. He had a dual appointment in Special Education and Psychology at Illinois, in addition to heading the IREC, although... his salary came exclusive- ly from Education. The IREC was one of the first applied research agencies that involved faculty from different departments. Jim Gal- lagher was a psychologist who obtained his degree with Sarason at Yale; Bernie Farber, a...

  5. How to Resolve an Ethical Dilemma Concerning Randomized Clinical Trials

    E-Print Network [OSTI]

    Marquis, Don

    1999-08-26

    grant program directors, June 3–4, 1967. Bethes- da, Md.: National Heart Institute, 1967:87-93. 2. Shaw LW, Chalmers TC. Ethics in cooperative clinical trials. Ann N Y Acad Sci 1970;169:487-95. 3. Kolata GB. Clinical trials: methods and ethics... has generated in the media and among people with this disease. First, it is unclear that the patients studied had idiopathic pulmonary fibrosis. 2 The disease is uncommon; consequent- ly, most centers are unable to enroll 18 patients over...

  6. Post-Harvest Marketing Alternatives 

    E-Print Network [OSTI]

    McCorkle, Dean; Welch, Mark

    2009-02-04

    , the producer stands to lose two ways. First, the price received for the grain when it is sold is lower than it was at harvest. Second- ly, the producer must pay the storage costs. Advantages of storing grain Extends the marketing season? Can take advantage... of higher prices if ? they occur Can take advantage of strengthening ? basis if it occurs Disadvantages of storing grain Prices may not increase enough to ? cover storage costs Basis may weaken? Stored grain can lose quality? Producer is unprotected...

  7. Cotton Breeding of the Bureau of Plant Industry U.S. Department of Agriculture and the Texas Experiment Station. 

    E-Print Network [OSTI]

    Bennett, R. L. (Robert Love)

    1905-01-01

    and first fruit limbs are hivh up from ground. l'lw ~,larrt llas a colnpaet appesmnre b;lt that IS clue to the many primary'limbs. Plants of this type or structure are late, fru~t slo~\\~ly and are not ada~ted to boll weevil conditions. demand... that will have a greater per cent of lint t I to 33, which is now the general yield, is greatly desired and would gely increase the profits of the grower at no cost whatever. Corn- ,re a cotton that yields 33* per cent of lint or a 500-pound bale he small g...

  8. Scalarituba missouriensis and its stratigraphic distribution

    E-Print Network [OSTI]

    Conkin, J. E.; Conkin, B. M.

    1968-09-20

    , Kentucky (loc. 8).-2. Large marcasitic cast of part of burrow lacking scalariform ridges and doubtfully referred to S. missouriensis (KUMIP 500483), X1.1. 5 6,10. Pyrite casts of burrows original- ly identified as coprolites (Conkin, 1957) (KUMIP 500484... in southwestern Missouri (Inc. 16).-7. Unoriented siltstone float block showing many burrows (KUMIP 500488), X0.3. 8. Upper surface of siltstone slab show- ing burrows and casts of worm-burrowed bivalves and brachiopods (KUMIP 500489), X0.3.— 11. Side view...

  9. The effects of chronic gamma radiation on the peripheral blood of Spanish goats 

    E-Print Network [OSTI]

    Leidy, Ross Bennett

    1966-01-01

    level then st ths lower level of radiation. Lasher et sl (1965) observed male snd female hLy-1 mice in groups varying fram six to 500 en%oslo that were exposed to continuous doses of 12 ~ flies 52 ' 43g 56' 74y 97 J '125 ~ snd 220 r/dsy snd secrif... or no cytoplasm around the cell edge) progressively disdnished to about 100 cells/mm5, Total lycpbocytes fell from about 9, 200/ma5 to 1, 000/car, During ECI there uas frequently sn exponeatisl decrease in lymphocyte count follooed by sons recovery before...

  10. Electricity Liberalisation in the European Union: A Progress Report

    E-Print Network [OSTI]

    Pollitt, Michael G.

    up of more than one country. There has also been an emphasis on incentive based regulation of natural monopoly transmission and distribution electricity networks, carried out by an independent regulator. The empirical basis for competitive EU... la n d Fr a n ce Ger m a n y Gre e ce Ire la n d Ita ly Lu x Ne d No rw a y Po rtu ga l Sp a in Sw itze rla n d UK Source: IEA Energy Statistics 2008 other sources tide wind solar thermal solar PV geothermal hydro nuclear waste biomass gas oil coal...

  11. Escape into illusions of the South in characters of Tennessee Williams 

    E-Print Network [OSTI]

    Van Nieuwenhuize, Paul Franklin

    1963-01-01

    ~ the plays, one should read1ly note the zreat similarity between events in the plays and events in Tennessee Wil)iams' 11fe. ERO'. E . . . it is "-r. =tive work t . e erson . I so "uc~ o al' so clo eiy re . . c to the o. e;ho =oes it. " Bio... himself working for sixty-five dollars a month as a clerk-typist and odd- Job man at the International Shoe Company, where ac! ordinS to the Nelson bioSranhy, Williams often spent ten to twelve hour s a day at a Job he thorouShly despised. At night he...

  12. Substrate selection by demersal calanoid copepods in shallow waters of Galveston Bay, Texas 

    E-Print Network [OSTI]

    Brown, Eric Kingsbury

    1986-01-01

    the different substrates provided density estimates of ppdpplt'h'hp lllddyt'd't'. ~pdd' t coronatus was the dominant species in the benthic samples and was most abundant on the silty-sand substrate fringing the oyster reef. A manipulative field experiment.... ~pd 1 p. f d 1 t 1 ( ly th y t h 11 the substrate container. Pigmented calanoid copepods that are larger (P. t ) d 1 (~pd y 1 p) p 'tly t'1'* different substrates as an adaptive strategy against predation pressure. ACKNOWLEDGMENTS I gratefully...

  13. Incomes of Migratory Agricultural Workers. 

    E-Print Network [OSTI]

    Sargent, Frederic O.; Metzler, William H.

    1960-01-01

    the fact that half of them, mainly women and childre-n, were out of the labor market complete- ly at the home base. During 1956, the average earnings per worker were $781, but male heads of households averaged earnings per family... varied closely with the size of the family work force and averaged $2,208. Less than one-fourth of this was earned at the home base; hence, migratory labor was a major source of their income. In the 446 households surveyed, there was a total of 1...

  14. Chilled Water Thermal Storage System and Demand Response at the University of California at Merced 

    E-Print Network [OSTI]

    Granderson, J.; Dudley, J. H.; Kiliccote, S.; Piette, M. A.

    2009-01-01

    and submeters stored in Web-CTRL; and hourly temperature data from National Oceanic and Atmospheric Administration. (NOAA). Campus loads were analyzed for load variability, weather sensitivity (Coughlin et al. 2009) and load shape statistical summary. DR... x wh e r e x is the av e r ag e ho ur ly loa d in the pe r iod , and N is the nu m be r of da y s in the pe r iod Weather sensitivity reflects the degree to which loads are impacted by local weather, and is an important consideration...

  15. Economic Efficiency of Texas Country Banks. 

    E-Print Network [OSTI]

    Lee, Virgil P. (Virgil Porter)

    1932-01-01

    . S. Department of Agriculture. 1 $30( ings tive -. "his study shows that most Texas country banks with less than 1,000 to $400,000 in earning assets have comparatively low earn- ;, pay very little interest to depositors, and charge compara...- ly high rates on loans. Also, the figures indicate that such ~nks are much more subject to failure or voluntary liquidation dur- g periods of depression than are the larger banks. The net earnings (before losses) for 62 banks with less than $400...

  16. Secondary Analysis of Case-Control Studies in Genomic Contexts 

    E-Print Network [OSTI]

    Wei, Jiawei

    2011-10-21

    , the subject of this study. Define ? = (?, ?1) and Spar(d, y, x,?, ?, ?) = fY (y, x, ?, ?) exp[d{?+m(y, x, ?1)}]. (3.2) The previous authors show that the semiparametric efficient profile likelihood that makes no assumptions about the distribution of X when... the distribution of Y given X is specified is, in the rare disease case, given by Lpar(D, Y,X,?, ?, ?) = Spar(D, Y,X,?, ?, ?)??1 d=0 Spar(d, t, X,?, ?, ?)dt . Define L(y, x, ?) = [?log{fY (y, x, ?, ?)}/??]?=0. Then the score function for ? evalu- ated...

  17. Magnesium and pyridoxine intake and mineral content of selected tissues and physical development in rats 

    E-Print Network [OSTI]

    Edgar, Susan Elaine

    1986-01-01

    lower f eed intake s than did rats from other dietary treatments. During lactation, dai ly feed consumpt ion was lower in an ima1 s depr ived of magnesium. Approximately 24 hr postpartum, in dams who consumed a magnesium-deficient diet, the heart... and kidney contained significantly more calcium, 150'% and 300% respectively. During lactation, mild magnesium restriction resulted in increased weight loss by dams and decreased weight gain by pupa. In the of f spring of rats dep1 et ed o f magnesium...

  18. Structural discordance between neogene detachments and frontal sevier thrusts, central Mormon Mountains, southern Nevada

    E-Print Network [OSTI]

    Wernicke, Brian; Walker, J. Douglas; Beaufait, Mark S.

    1985-02-01

    , light ohve to dark gray, fine-to coarse-graned, laminated to thn-bedded, cherry wth columnar strornatolites near top _/ Unit 4- Dolomde, light o dark gray, fine-to ccx3rse-cjraned, lamnated to very thm-beddecL, 3nt strcmatolltes near base J... olomitic sltstone, grayish orange, fin tomedum-graned, laminated to tt'un-bedded -/ Dolomite, light ohve-gray, medium to coarse-grained, tt'un-bedded, local- ly sllty, oohhc, black bond at base Unit 3- Dolornlte, IJht to dark gray, fine to coome...

  19. . .E1 < E2 , .1 . N n ? ()

    E-Print Network [OSTI]

    Rabani, Eran

    . , : ,Lx = Ly = L .3 nm (x, y) = 2 L sin nx L sin my L |nm | = nm unm |nm .(unm ) . (x, y () : , | = nm unm |nm (x, y) = nm unmnm (x, y) = nm unm 2 L sin nx L sin my L , unm = ¢ L 0 ¢ L 0 nm (x, y) (x, y) dxdy = ¢ L 0 ¢ L 0 2 L sin nx L sin my L 4 3L sin 2x L sin2 y L dxdy = 2 L ¢ L 0 sin nx L sin

  20. Nutritional and Feeding Management of Broodmares 

    E-Print Network [OSTI]

    Gibbs, Pete G.; Potter, Gary D.; Vogelsang, M. M.

    2005-04-13

    well-be ing is an im por tant part of an effective broodmare op er a tion. Broodmares have specifi c nu tri - tion al re quire ments that differ from other class es of horses. There are differences both in the amount of feed mares need... tion relative to the effect of nu tri tion on re pro - duc tive per for mance in mares. It has been clearly shown that mares should be kept in good condition the year round, and es pe cial ly as breed ing season approaches. By check ing...

  1. Bowdon Residence 

    E-Print Network [OSTI]

    Raiford Stripling Associates, Inc.; Stripling, Raiford L.

    2011-08-29

    LIBRARY a 4 M COLLEGE VF TEXAS d Theeie Sabaitted te the Oredeate School of the Agrioultarel ead Neohaaieal College of Teaaa ia partial fulfillaent ef the retaireaente for the degree af kagaet~ 19/6 l? EOQSOGC STADT GF THE EPKEINEETLL HEEP... oll er perl? ?f ?S oesmtiee, ines?ding to the ly54 gaited State? oeeaes thin crea hae apys?a%?ately 6, 5 ailliea harv?et?hie ?erne ef Qdsh nearly 5, 5 aLL lien (cheat SO par eeet) ere desat?4 te hsys And pa?taro ead pse aeaenI epsa pa?taro Thee...

  2. Methane adsorption on Devonian shales 

    E-Print Network [OSTI]

    Li, Fan-Chang

    1992-01-01

    METHANE ADSORPTION ON DEVONIAN SHALES A Thesis by FAN-CHANG LI Submitted to thc Office of Graclua4e Sturiics of texas AgiM Ulllvel'sliy in pari, ial fulfilhuent of t, hc requirements I'or t, hc degree of ii IAS'I'Elf OF SCIL'NCE December... 1992 Major Subject, : Chemical Engineering METHANE ADSORPTION ON DEVONIAN SHALES A Thesis l&y I'AN-CHANC LI Approved as to style and contcut by: A. T. 'vtratson (Chair of Commitl. ee) John C. Slattery (Member) Bruce . Hcrhcrt (Memhcr...

  3. No Holds Barred Issue 12 

    E-Print Network [OSTI]

    Multiple Contributors

    2013-11-27

    dressed. He wore the black, a color he usual ly did not favor these days. Black,tailoredby his own hands, created just for himself, and never worn outside this room. Until now. He put on his courage as he put on one of his best creations. He wandered... is not as he appears, perhaps he is hell of to live with, a selfish, frigid sort who takes but does not give. Garak imagined a one sided sex life, al ways serving on his knees, never taking in turn. But the image vanished. Bashir was democratic to a fault...

  4. The modern day discount house as a separate retail establishment 

    E-Print Network [OSTI]

    Broussard, Carroll James

    1964-01-01

    . Almost any product placed on the market was as; ed of succ"ss. Retail establishments were en- joying i igh profits, and hardly any price competition was apparen , Practically any method of operation was deemed succe. "?- ' 1. Discou-it houses, as well... as other retail es- tablisl . nts, prosp red during this period of a seller' s market. i ng the eai ly 1950's, the demand for consumer good- '~ t followed World War II was almost altogether 10 satisfi i and a buy r's market prevailed. Generally...

  5. Specification buying as it relates to private brand merchandising 

    E-Print Network [OSTI]

    Tarver, Cleo B

    1964-01-01

    of Census uses the number four as a minimum, 2 ~ A retail ostablishment may be defined as a single or separate place of business, princ1- pa' ly engaged i. n the performance of marketing functions& wherein or out of whioh sales are made primarily..., Catecra, Market- I. ~Il t (N Y I Appl t -C t y-C ft, 19' ~ 16Ibid 12 chains whose sales volumes now fall into the "moro than a billion dollar category" ~ During this same period, the oorporate chains, voluntary chains, and retailer-cooperatives have...

  6. Coleridge’s Attitude Toward Various Subjects as Shown in His “Biographia Epistolaris”

    E-Print Network [OSTI]

    Steven, Effie Louise

    1911-01-01

    , through so many generations, the wit and knowledge, being subtle spirits, have evaporated, 91. To Godwin, Kay 21, 1800. Hartley sends his love to Mary. "TTiat, and not to Jfanny?" "Yes, and to Fanny, but I'll have Mary". He often talks about them...©olnd© the awful sublimity ©f Alpine scenery, yet compensate fer the want of it by beauties, of whioh this very l©wn©ss is a n©e©ssary condition. Tester-morning I saw th© lesser lake complet- ly hid by mist; but the moment the Sun po«p©i ©v©r th© Mill, th© mist...

  7. An investigation of the effect of control movements on aircraft motion and tail loads in recovering from rolling pullout maneuvers 

    E-Print Network [OSTI]

    Marlow, Louis Gene

    1960-01-01

    Experienced on a Swept- Ming Fighter Airplane&n NACA RH No. A55A06& 1955. 12. Reed, R. D. , nVerticai-Tali Loads Heasured in Flight on Four Airplane Configurations at Transonic and Supersonic Speeds, " NASA TN No. D-215& 1960. 13. Pass, H. R. , "Analysis.... iin view of the above considerations, lit becomes necessary to Investigate the maneuvers that wl'li Induce excessive loads on the airplane, especial ly on the vertical tali I. In the subsonic range, where the. stab( I 1ty margin is margina...

  8. Mode I transverse cracking in an epoxy and a graphite fiber reinforced epoxy 

    E-Print Network [OSTI]

    Williams, David Robert

    1981-01-01

    to the fracture toughness of a material, which is a measure of its resistance to the growth of a flaw. The fracture behavior of laminated composit. es is great- ly complicated by the interaction between fiber and matrix. The energy required to create a new... the number of chemical bonds span- ning the cross-section of the specimen as a function of time and applied load. The viscoelastic character of epoxies should result in time-dependent crack growth behavior in composites. If the fracture mechanism does...

  9. The Irish Potato. 

    E-Print Network [OSTI]

    Price, R. H.

    1987-01-01

    0 0 pounds potassium S ?? sulphate for one acre. The very costly fertilizer, nitrate of soda, which lowered the g ^ j yield of sweet potatoes, chas in i | i every instance lowered the 'S'g'g yield of irish potatoes below the general average... of the S | % three check plots. This result 5|| was p la in ly foreshadowed |^| through the season of growth ?2 by the much weaker growth |g? of vines on the plots wjiich contained nitrate of soda. The fertilizers could not have in- *S|.| jured the seed...

  10. The Chemical Composition of Some Soils of Angelina, Brazoria, Cameron, Cherokee, Delta, Lamar, Hidalgo, Lavaca, Montgomery, Nacogdoches, Robertson, Rusk, Webb and Wilson Counties. 

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1909-01-01

    and texture and showing a yellowish gray color. The ~rganic matter contained in the first few inches gives the surface soil a grayish color. The topography is rolling with excellent surface drainage. The soil is f*-,;:ly retentive of moisture, and when... overflows. T11e principal timber growth is pecan and ash. This is one of the most desirable soils of the bottom, as it is very fertile. has good drainage, and is easily cultivated. ll'rost of it is under cultivation at present. Sugar cane is thc principal...

  11. T-Negative Issue 14 

    E-Print Network [OSTI]

    Berman, Ruth; Hall, Anna Mary

    is probably inevitable, although the use of computer-aids and other adVances in educa tion may r..ave speeded up the p:l:'Ocess. According to Stephen Whitfield in The Making of Star Trek, filcC::>y had been a - generaljpractitioner until his decision... -2- T-Negative 14, March lY72, comes from Ruth Berman, 5620 Edgewater Boulevard Minneapolis Minnesota 55417. Reprint: Belated Brag Dept: The Portland Oregonian had a poem of mine, "Sea-going House," in the "Oregonian Verse" column, November 19...

  12. Nepali Aawaz Volume 1, Issue 14, 10 May 2006

    E-Print Network [OSTI]

    Shrestha, Kashish Das

    |'k cnld:gfbsf pkfWoIf aL/]Gb| ofSy'Dafn] cfk\\mgf] ;d'xsf af/]df hfgsf/L lbPsf lyP . Anushil?Shrestha?in?Qatar Above: Sangarsha Band performing in Doha, Qatar. Left: Pop star Prakash Paudel also perfoms at the same event Photos: Anushil Shrestha... (Drums, Vocal), Nirakar Yaktumba (bass), Manoj KC (Guitar, Keyboard), Sanjay Shrestha (Percussions) and Manose Singh (flute). There is no lack of Nepali fans for this band. But the fact that they play fusion rock, and in recent years fusion jazz...

  13. An electron microscopy study of ground-nut poisoning in turkey poults 

    E-Print Network [OSTI]

    Martin, Alcides Amilcar

    1963-01-01

    etiology. In the eat'Ly papers the condition was known by the name of Turkey ' X" disease. However, this name was quickly changed when in L961 Blount (7) concluded that toxic Brasilian ground-nut meal was responsible for the outbreaks of this new... condition. Similar toxic effects in ducklings, chickens, rats, guinea pigs, cows and pigs have also been reported. In general, there is little available information about how and where tbe toxic principles of any kind act in the cells structures. Also...

  14. Failure of the Shockley-Haynes Mobility Experiment with organic semiconducting materials 

    E-Print Network [OSTI]

    Boehme, Hollis Clyde

    1961-01-01

    of the teflon cylinder was 0. 20$ cm + 0. 00$ cm whioh was slight- ly smaller than the graphite rods used, This arrapgement provided an airtight seal to prevent the sublimation of iodine from the samples after pressing Small holes were drilled through...-iodine was lower than that reported, The upper limit of 3000 lb/i. n for the pressure used to 2 oompress the samples was dictated by the graphite rods used and the wall thickness of the teflon oylinders. Pressures above $000 lb/in oaused either the ends...

  15. A study of food habits of two species of silverside, Menidia beryllina (Cope) and Membras martinica (Valenciennes), in upper Galveston Bay, Texas 

    E-Print Network [OSTI]

    Dixon, Claude Allen

    1974-01-01

    species changed their food habits with successive in- 1 1 . lp t f d f M. b~tft 10 ? 49 ttd of Acartia tonsa, nauplii, polychaetes, and some harpacticoids. 9 f d f M. ~bill, f0dl g ttd f insects, polychaetes, and smaller fish. Smaller M. martinica IO... upon it. The literature contains little information on the food habits of M. ~bill dM. ' ' . Mild b d d db d (19291 ported that M. berylline fed upon small crustaceans, molluscs, insects, d 19 . 1 'd (1914) f d 4 M. ~bll' f d 4 ly planktonic...

  16. The relationship between seasonal supply, demand and price of Texas calves 

    E-Print Network [OSTI]

    Webb, Tarvin Flannis

    1956-01-01

    logical that in? creased supplies might not be forthcoming in response to price in? creases. This reluctance on the part of producers to sell their prod? uct is called producers* demand for his own product. Supply depends on scarcity. The supply of any... into general? ly accepted economic theory. Information prior to 1946 was not used since the war undoubtedly influenced decisions concerning calves. Elasticity of Demand The demand for a good is responsive to a change in its price, but there are differences...

  17. Correlation of gravity anomalies and geology in the San Antonio region, Texas 

    E-Print Network [OSTI]

    Gordon, Patrick Thomas

    1968-01-01

    ?al, Kendall? Bl;!nco, encl Gil- lc. spic cour?tie . It is bouncled b? latitudes 29 00 ' encl 30o 07 ' 30" ir], and long. ' tiides 98c' 22 ' 30" V and 98o '5 ' iri. C] ties w] thin i l?c. ai-ea are Sar. Ant, nio, Bocrrnc r Blat?co, anrlr dohnson Ci Ly... zone of the Ouachita belt. The axis of this maximum is located at about 29o 00 ' N latitude in the area shown on the gravity map (Pl. I). South of thc axis the gravity anomaly values decrease gently toward the Gulf. coast, according to regional...

  18. Grip Issue 4 

    E-Print Network [OSTI]

    Multiple Contributors

    1979-01-01

    of copywrite of Paramount Pictures, Gene Roddenberry, 20th Century Fox, or George Lucas© Direct all correspondence to Roberta Rogow, P.O. Box 124, Fair Lawn, N.J. 07410 GRIP is printed at The Printing Hub, Fair Lawn, N.J. /SOME WORDS FROM THE EDITOR Hello, once... access to a mimeo machine, one must pay a printer to get copies of a fanzine, and in my case, there is a cash flow problem© Ergo, GRIP #1 and GRIP #2 were very short (less than 20 sheetr each) and were corresponin^ly cheap to print. GRIP #3 was larger...

  19. Quick Meals. 

    E-Print Network [OSTI]

    Anonymous

    1959-01-01

    in 300' oven to warm. Prepare potatoes. i I 1 tablespoon butter or margarine I 1 can condensed mushroom soup 1/2 CUP milk 1 tablespoon minced onion 4 medium sized potatoes, thinly sliced Grease bottom of pressure saucepan with butter... or margarine. Combine soup, milk and onion. Place po- tatoes and mushroom soup mixture in cooker alternate- ly, reserving enough soup to cover the top layer. Cook at 15 pounds pressure 10 minutes. Cool quickly. Serves 4. Begin heating fat for croquettes...

  20. Quantitative relationships between structure and reactivity of aliphatic esters 

    E-Print Network [OSTI]

    Yager, Billy Joe

    1960-01-01

    conducted, the re. . ct ion c end it iona vary vide ly from one study to another. Ihorofore& it ws felt th. t a conprehens ive study should bc n. ". de of c large nur. ber of rotors under 1 don! 1cal re". ct ion conditions co th . t ths v". ri. . t ion... const nto were obtsined. . 'icvevcr, in this rescorch 40 ~ diox ns v-o used with consistent rec its, (purthor work in this lcbor cr?hcs shotm c. -n "intent results o. . =. bc obtsinod wiih ~(1 ~ dioxnne by vol&no, ) 2:. . ~rc;f ~&0. diox:m by vol c:c...

  1. AdvancedBPA_jk

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  2. Advances

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  3. Advances in Glass Chemistry - Hanford Site

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  4. Advancing Innovation Through Partnerships 2011-2012 Technology Transfer Progress Report

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  5. Advancing System Flexibility for High Penetration Renewable Integration

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  6. Advice #231, Proposed Changes to the Tri-Party Agreement (TPA) for Central Plate

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  7. Advice: Safety at the WTP

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  8. Advisements

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  9. Advisory Board Members

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  10. Aeroacoustic Tests of Flatback Airfoils

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  11. Aerodynamic Sensitivity Analysis of Rotor Imbalance and Shear Web Disbond Detection Strategies for Offshore Structural Health Prognostics Management of Wind Turbine Blades

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  12. Aerodynamic and Aeroacoustic Properties of a Flatback Airfoil: An Update

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  13. Aeroelastic Modeling of Large Off-shore Vertical-axis Wind Turbines: Development of the Offshore Wind Energy Simulation Toolkit

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  14. Aerosol Modeling at LLNL - Our capability, results, and perspective

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  15. Aerosol Observing System Upgraded

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  16. Aerosol Radiative Effects and Single-Scattering Properties in the Tropical Western Pacific

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  17. Aerosol Radiative Effects in the Tropical Western Pacific

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  18. Aerosol Radiative Forcing During Spring-Summer 2002 from Measurements at IAP Scientific Station Near Moscow

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  19. Aerosol Radiative Forcing Under Cloudless Conditions.in Winter ZCAREX-2001

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  20. Aerosol Remote Sealing System - Energy Innovation Portal

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  1. Aerosol Simulations by LLNL IMPACT and Comparisons with Field Measurements

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  2. Aerosol Working Group Contributions Accomplishments for 2006

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  3. Affirmative Procurement | Y-12 National Security Complex

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  4. Affordable

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  5. Aftab Ahmed | Argonne National Laboratory

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  6. After 70 years of service, taking action for the future

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  7. After Beamtime | Linac Coherent Light Source

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  8. After Review, DOE Competitively Awards Contract For the Management of Waste Isolation Pilot Plant

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  9. Agencies announce second site-wide five-year review of cleanup at DOE�s

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  10. Agencies announce third site-wide five-year review of cleanup at DOE's

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  11. Agencies complete comprehensive investigation for radioactive and hazardous

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  12. BPAonFabric_jk

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  13. BPAonFabric_jk

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  14. BPA…2011…01001…FOIA Response

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  15. BPA…2012…00476…FOIA Request

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  16. BPA…2012…00477…FOIA Request

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  17. BPA…2012…00478…FOIA Request

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  18. BPA…2012…00479…FOIA Request

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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  19. BPAs NAESB OS Prepartory Customer Workshop

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  20. The Mysterious Morphology of MRC0943-242 as Revealed by ALMA and MUSE

    E-Print Network [OSTI]

    Gullberg, Bitten; Lehnert, Matthew D; Vernet, Joel; Bacon, Roland; Drouart, Guillaume; Emonts, Bjorn; Galametz, Audrey; Ivison, Rob; Nesvadba, Nicole P H; Richard, Johan; Seymour, Nick; Stern, Daniel; Wylezalek, Dominika

    2015-01-01

    We present a pilot study of the z=2.923 radio galaxy MRC0943-242, where we for the first time combine information from ALMA and MUSE data cubes. Even with modest integration times, we disentangle an AGN and a starburst dominated set of components. These data reveal a highly complex morphology, as the AGN, starburst, and molecular gas components show up as widely separated sources in dust continuum, optical continuum and CO line emission observations. CO(1-0) and CO(8-7) line emission suggest that there is a molecular gas reservoir offset from both the dust and the optical continuum that is located ~90kpc from the AGN. The UV line emission has a complex structure in emission and absorption. The line emission is mostly due to i) a large scale ionisation cone energised by the AGN, ii) a Ly-alpha emitting bridge of gas between the radio galaxy and a heavily star-forming set of components. Strangely, the ionisation cone has no Ly-alpha emission. We find this is due to an optically thick layer of neutral gas with u...

  1. Integrated immunoisolation and protein analysis of circulating exosomes using microfluidic technology

    E-Print Network [OSTI]

    He, Mei; Crow, Jennifer; Roth, Marc; Zeng, Yong; Godwin, Andrew K.

    2014-08-06

    6373; Tel: +1 (913) 945 m n 5) ns d O pe n A cc es s A rti cl e. P ub lis he d on 1 8 Ju ly 2 01 4. D ow nl oa de d on 1 4/ 11 /2 01 4 19 :4 2: 57 . Th is ar tic le is li ce ns ed u nd er a C re at iv e Co m m on s A ttr ib ut io n... the captured exo- Lab on a ChipPaper O pe n A cc es s A rti cl e. P ub lis he d on 1 8 Ju ly 2 01 4. D ow nl oa de d on 1 4/ 11 /2 01 4 19 :4 2: 57 . Th is ar tic le is li ce ns ed u nd er a C re at iv e Co m m on s A ttr ib ut io n- N on Co...

  2. Discovery of a fast, broad, transient outflow in NGC 985

    E-Print Network [OSTI]

    Ebrero, J; Kaastra, J S; Ely, J C

    2015-01-01

    We observed the Seyfert 1 galaxy NGC 985 on multiple occasions to search for variability in its UV and X-ray absorption features in order to establish their location and physical properties. We use XMM-Newton to obtain X-ray spectra using the EPIC-pn camera, and the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (HST) to obtain UV spectra. Our observations are simultaneous and span timescales of days to years. We find that the soft X-ray obscuration that absorbed the low energy continuum of NGC 985 in August 2013 diminished greatly by January 2015. The total X-ray column density decreased from 2.1 x 10^22 cm^-2 to ~6 x 10^21 cm^-2. We also detect broad, fast UV absorption lines in COS spectra obtained during the 2013 obscuration event. Lines of C III*, Ly alpha, Si IV and C IV with outflow velocities of -5970 km/s and a full-width at half-maximum of 1420 km/s are prominent in the 2013 spectrum, but have disappeared in all but Ly alpha in the 2015 spectra. The ionization state and the column d...

  3. The extended Baryon Oscillation Spectroscopic Survey (eBOSS): a cosmological forecast

    E-Print Network [OSTI]

    Zhao, Gong-Bo; Ross, Ashley J; Shandera, Sarah; Percival, Will J; Dawson, Kyle S; Kneib, Jean-Paul; Myers, Adam D; Brownstein, Joel R; Comparat, Johan; Delubac, Timothée; Gao, Pengyuan; Hojjati, Alireza; Koyama, Kazuya; McBride, Cameron K; Meza, Andrés; Newman, Jeffrey A; Palanque-Delabrouille, Nathalie; Pogosian, Levon; Prada, Francisco; Rossi, Graziano; Schneider, Donald P; Seo, Hee-Jong; Tao, Charling; Wang, Dandan; Yèche, Christophe; Zhang, Hanyu; Zhang, Yuecheng; Zhou, Xu; Zhu, Fangzhou; Zou, Hu

    2015-01-01

    We present a science forecast for the eBOSS survey, part of the SDSS-IV project, which is a spectroscopic survey using multiple tracers of large-scale structure, including luminous red galaxies (LRGs), emission line galaxies (ELGs) and quasars (both as a direct probe of structure and through the Ly-$\\alpha$ forest). Focusing on discrete tracers, we forecast the expected accuracy of the baryonic acoustic oscillation (BAO), the redshift-space distortion (RSD) measurements, the $f_{\\rm NL}$ parameter quantifying the primordial non-Gaussianity, the dark energy and modified gravity parameters. We also use the line-of-sight clustering in the Ly-$\\alpha$ forest to constrain the total neutrino mass. We find that eBOSS LRGs ($0.60.6$), ELGs ($0.6

  4. Discovery of Red Selected Arcs at z=4.04 behind Abell 2390

    E-Print Network [OSTI]

    Brenda Frye; Tom Broadhurst

    1997-12-08

    We describe the properties of a system of red arcs discovered at z=4.04 around the cluster A2390 ($z=0.23$). These arcs are images of a single galaxy, where the lensing is compounded by an elliptical cluster member lying close to the critical curve of the cluster. The combined magnification is estimated to be $\\sim 20$, using HST images, depending the gradient of the model potentials, implying an unlensed magnitude for the source of $I_{AB}=25.5$. Keck spectroscopy reveals a continuum well fitted by B-stars and attenuated by the Lyman-series forest with an opacity consistent with z$\\sim$4 QSO spectra, making the arcs relatively red. Damped Ly$\\alpha$ absorption is observed at the source redshift with a relatively high column, n$_{HI}=3\\times 10^{21}$. Curiously, Ly$\\alpha$ emission is spatially separated ($\\sim 0.5$kpc) from the bright stellar continuum and lies $\\sim$ 300Km/s redward of interstellar absorption lines at z=4.04. Similar redwardl of young galaxies. Finally, we briefly comment on the notorious ``straight arc'' in A2390, which is resolved into two unrelated galaxies at z=0.913 and z=1.033.

  5. Spectroscopic determination of temperature and density spatial profiles and mix in indirect-drive implosion cores

    SciTech Connect (OSTI)

    Welser-Sherrill, L.; Mancini, R. C. [Department of Physics, University of Nevada, Reno, Nevada 89557 (United States); Koch, J. A.; Izumi, N.; Tommasini, R.; Haan, S. W. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Haynes, D. A.; Kyrala, G. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Golovkin, I. E.; MacFarlane, J. J. [Prism Computational Sciences, Madison, Wisconsin 53703 (United States); Delettrez, J. A.; Marshall, F. J.; Regan, S. P.; Smalyuk, V. A. [Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)

    2007-11-15

    In the field of inertial confinement fusion (ICF), work has been consistently progressing in the past decade toward a more fundamental understanding of the plasma conditions in ICF implosion cores. The research presented here represents a substantial evolution in the ability to diagnose plasma temperatures and densities, along with characteristics of mixing between fuel and shell materials. Mixing is a vital property to study and quantify, since it can significantly affect implosion quality. We employ a number of new spectroscopic techniques that allow us to probe these important quantities. The first technique developed is an emissivity analysis, which uses the emissivity ratio of the optically thin Ly{beta} and He{beta} lines to spectroscopically extract temperature profiles, followed by the solution of emissivity equations to infer density profiles. The second technique, an intensity analysis, models the radiation transport through the implosion core. The nature of the intensity analysis allows us to use an optically thick line, the Ly{alpha}, to extract information on mixing near the core edge. With this work, it is now possible to extract directly from experimental data not only detailed temperature and density maps of the core, but also spatial mixing profiles.

  6. For the Men at the Front 

    E-Print Network [OSTI]

    Dykes, John Bacchus, 1823-1876 [composer; Oxenham, John, 1852-1941 [author

    2012-03-05

    &~3 A. Pp~ovc~ as to s'~v3. o ~~'~ co-. &ie~zb by: , . c~:ver. Janus~ 1968 U9. 8i". 66 ti~ 5X' ~ JOE g ~ 3GP'8 f QZ Gl~~~QBMQ XQ& QX'884 ill 446 Qi1~& 0 f 66t Q~~ikL'Bg GIVE f QX' MiS iilV$1GGMC GBQ9. $'583MQ LB 16CG'53. Bg GD(l 'OFCCGZ. 'Mg... ~ . ' ~ ' 1 Od iv C j2 L P l Tj', XU~)22Q3UC'j~lC7'2 'i'PAT T. jE CL X1XCS QI'LY The ls22ottiest pzohle2229 i22 philoooohy QG22 'be ezpzesse~l sic2X2ly2 Why Goes acn Got as 228 doeGI XG hc "- free G:. Got lii 8 q Qz is -19 the Xlal'222 of 922 io...

  7. COSMIC ORIGINS SPECTROGRAPH OBSERVATIONS OF WARM INTERVENING GAS AT z {approx} 0.325 TOWARD 3C 263

    SciTech Connect (OSTI)

    Narayanan, Anand [Indian Institute of Space Science and Technology, Thiruvananthapuram 695547, Kerala (India); Savage, Blair D.; Wakker, Bart P., E-mail: anand@iist.ac.in, E-mail: savage@astro.wisc.edu, E-mail: wakker@astro.wisc.edu [Department of Astronomy, University of Wisconsin-Madison, 5534 Sterling Hall, 475 N. Charter Street, Madison, WI 53706-1582 (United States)

    2012-06-10

    We present HST/COS high-S/N observations of the z = 0.32566 multiphase absorber toward 3C 263. The Cosmic Origins Spectrograph (COS) data show absorption from H I (Ly{alpha} to Ly{theta}), O VI, C III, N III, Si III, and C II. The Ne VIII in this absorber is detected in the FUSE spectrum along with O III, O IV, and N IV. The low and intermediate ions are kinematically aligned with each other and H I and display narrow line widths of b {approx} 6-8 km s{sup -1}. The O VI {lambda}{lambda}1031, 1037 lines are kinematically offset by {Delta}v {approx} 12 km s{sup -1} from the low ions and are a factor of {approx}4 broader. All metal ions except O VI and Ne VIII are consistent with an origin in gas photoionized by the extragalactic background radiation. The bulk of the observed H I is also traced by this photoionized medium. The metallicity in this gas phase is Z {approx}> 0.15 Z{sub Sun} with carbon having near-solar abundances. The O VI and Ne VIII favor an origin in collisionally ionized gas at T = 5.2 Multiplication-Sign 10{sup 5} K. The H I absorption associated with this warm absorber is a broad-Ly{alpha} absorber (BLA) marginally detected in the COS spectrum. This warm gas phase has a metallicity of [X/H] {approx}-0.12 dex, and a total hydrogen column density of N( H) {approx} 3 Multiplication-Sign 10{sup 19} cm{sup -2}, which is {approx}2 dex higher than what is traced by the photoionized gas. Simultaneous detection of O VI, Ne VIII, and BLAs in an absorber can be a strong diagnostic of gas with T {approx} 10{sup 5}-10{sup 6} K corresponding to the warm phase of the warm-hot intergalactic medium or shock-heated gas in the extended halos of galaxies.

  8. Improved DC Gun Insulator Assembly

    SciTech Connect (OSTI)

    Sah, R.; Dudas, A.; Neubauer, M. L.; Poelker, M.; Surles-Law, K. E.L.

    2010-05-23

    Many user fa­cil­i­ties such as syn­chrotron ra­di­a­tion light sources and free elec­tron lasers re­quire ac­cel­er­at­ing struc­tures that sup­port elec­tric fields of 10-100 MV/m, es­pe­cial­ly at the start of the ac­cel­er­a­tor chain where ce­ram­ic in­su­la­tors are used for very high gra­di­ent DC guns. These in­su­la­tors are dif­fi­cult to man­u­fac­ture, re­quire long com­mis­sion­ing times, and often ex­hib­it poor re­li­a­bil­i­ty. Two tech­ni­cal ap­proach­es to solv­ing this prob­lem will be in­ves­ti­gat­ed. First­ly, in­vert­ed ce­ram­ics offer so­lu­tions for re­duced gra­di­ents be­tween the elec­trodes and ground. An in­vert­ed de­sign will be pre­sent­ed for 350 kV, with max­i­mum gra­di­ents in the range of 5-10 MV/m. Sec­ond­ly, novel ce­ram­ic man­u­fac­tur­ing pro­cess­es will be stud­ied, in order to pro­tect triple junc­tion lo­ca­tions from emis­sion, by ap­ply­ing a coat­ing with a bulk re­sis­tiv­i­ty. The pro­cess­es for cre­at­ing this coat­ing will be op­ti­mized to pro­vide pro­tec­tion as well as be used to coat a ce­ram­ic with an ap­pro­pri­ate gra­di­ent in bulk re­sis­tiv­i­ty from the vac­u­um side to the air side of an HV stand­off ce­ram­ic cylin­der. Ex­am­ple in­su­la­tor de­signs are being com­put­er mod­elled, and in­su­la­tor sam­ples are being man­u­fac­tured and test­ed

  9. Sodium metalcarbonylates as potential catalysts for coal liquefaction involving CO/H{sub 2}O or H{sub 2}

    SciTech Connect (OSTI)

    Burgess, C.E.; Hulston, C.J.K.; Redlich, P.J. [Monash Univ., Clayton, Victoria (Australia)] [and others

    1995-12-31

    Alkalis (e.g. NaAlO{sub 2}, NaOH) catalyse CO/H{sub 2}O/coal reactions at 365{degrees}C, particularly for lignites (brown coals), and metal catalysts (e.g. Co, Ni, and Me) are effective coal hydrogenation catalysts above 350{degrees}C. Accordingly, precursors combining alkaline properties and a transition metal in one compound (the alkali promoting the CO/H{sub 2}O/coal reaction and the transition metal promoting reactions of coal with H{sub 2}, either added initially or produced from CO/H{sub 2}O by the water gas shift reaction) may provide improved conversions. Two precursors were made by reacting NaOH with Fe(CO){sub 5} [NaHFe(CO){sub 4}] and with CO{sub 2}(CO){sub 8} [NaCo(CO){sub 4}]. For reactions at 365{degrees}C, 30 min, using CO (3 MPa, cold) and H{sub 2}O with Loy Yang (LY) brown coal, conversion to dichloromethane-solubles increased from 29% without catalyst to 55% with NaHFe(CO){sub 4} and 63% with NaCo(CO){sub 4}. Excess NaOH was present, so that the increase in conversion was probably due to the NaOH as reactions using NaOH alone at a similar concentration gave conversions of 60%. Purer NaCo(CO){sub 4} gave only 40% conversion; it is possible the catalyst precursor decomposed during loading of catalyst. Dry LY coal, treated with these metal-alkali catalysts, was reacted with H{sub 2} (6 MPa, cold) at 400{degrees}C for 30 min without solvent. Low conversions ({<=}45%) were obtained, in contrast to conversions of 43% from reactions under the same conditions of LY coal which had been treated with Ni and Mo salts. NaHFo(CO){sub 4} and NaCo(CO){sub 4} were ineffective in CO/H{sub 2}O reactions of a higher rank coal (Surat Basin) but gave comparable results to Ni/Mo in hydrogenation reactions.

  10. The 21-cm Signal from the Cosmological Epoch of Recombination

    E-Print Network [OSTI]

    Fialkov, Anastasia

    2013-01-01

    The redshifted 21-cm emission by neutral hydrogen offers a unique tool for mapping structure formation in the early universe in three dimensions. Here we provide the first detailed calculation of the 21-cm emission signal during and after the epoch of hydrogen recombination in the redshift range of z ~ 500-1,100, corresponding to observed wavelengths of 100-230 meters. The 21-cm line deviates from thermal equilibrium with the cosmic microwave background (CMB) due to the excess Ly-alpha radiation from hydrogen and helium recombinations. The resulting 21-cm signal reaches a brightness temperature of a milli-Kelvin, orders of magnitude larger than previously estimated. Its detection by a future lunar or space-based observatory could improve dramatically the statistical constraints on the cosmological initial conditions compared to existing two-dimensional maps of the CMB anisotropies.

  11. Additional Studies on the Control of Nutgras: (Cyperus Rotundus L.) 

    E-Print Network [OSTI]

    Allen, William Wayne

    1960-01-01

    + !88'Les talc leaves Qa * 'ly vis ble which further aggr (Ia QB t ?8 weedy p vp( "'. y Gf n'Jtgrass infes+Btlons ~ Rapid tuber fm?siati?&n smRPG 8'Jtgrsso ore " ' the . " Gst diff! Lait weeds to control. The -'o Qrence Gf tuber 8 to co d Bnd t'. Iei... rrutgeass tubers at 1 foo+ and 1 yard spacines in sterilized soil. Af". er 10 weetss it&ere were 7 arid . ", 9. 2 plartts per square foot &rc 3, 092, 760 snd 2, 14)dl~&2 plan+s per acre in each a ea, respectively. dt'. 1 d d t. . ' d~m I I d lt. d td ddd...

  12. The D/H ratio at z=0.7 toward Q 1718+4807

    E-Print Network [OSTI]

    Sergei A. Levshakov; Wilhelm H. Kegel; Fumio Takahara

    1998-01-13

    The apparent discrepancy between low and high D abundances derived from QSO spectra may be caused by spatial correlations in the stochastic velocity field. If one accounts for such correlations, one finds good agreement between different observations and the theoretical predictions for standard big bang nucleosynthesis (SBBN). In particular, we show that the H+D Ly-alpha profile observed at z = 0.7 toward Q1718+4807 is compatible with 4.1*10^{-5} <= D/H <= 4.7*10^{-5}. This result is consistent with our previous D/H determination for the z = 2.504 system toward Q1009+2956 and, thus, supports SBBN.

  13. The primordial deuterium abundance : problems and prospects

    E-Print Network [OSTI]

    Sergei A. Levshakov; Fumio Takahara; Wilhelm H. Kegel

    1997-12-10

    The current status of extragalactic deuterium abundance is discussed using two examples of `low' and `high' D/H measurements. We show that the discordance of these two types of D abundances may be a consequence of the spatial correlations in the stochastic velocity field. Within the framework of the generalized procedure (accounting for such effects) one finds good agreement between different observations and the theoretical predictions for standard big bang nucleosynthesis (SBBN). In particular, we show that the deuterium absorption seen at z = 2.504 toward Q1009+2956 and the H+D Ly-alpha profile observed at z = 0.701 toward Q1718+4807 are compatible with D/H $\\sim 4.1 - 4.6\\times10^{-5}$. This result supports SBBN and, thus, no inhomogeneity is needed. The problem of precise D/H measurements is discussed.

  14. Experimental wrench faulting at confining pressure 

    E-Print Network [OSTI]

    Bartlett, Wendy Louise

    1980-01-01

    0 )J S S S- Vl Itf th Ql S J= C Vl C s 0 I ? C Cl 'l3 GJ IV CI Cl 0 0 Cl )O C C Ql QJ th Vl 5- S- GI Ql Gl Gl C C QJ Gl CI Ql S JC '0 U nf 0 0 0 Vl th Ih Vl QJ S S S 5 )I )) )) QJ V)0'UUS 5- 0 0 0 C SEEES S 5- 5 5- C S GJ IV SJ... the HP9825A program for data re- duction; Larry Casarta, for participating in da1ly discuss1ons about experimental design, stress, stra1n, and natural shear zones; Lenora [roodler, Marjle White, and Arthur F. X. O'Keefe, for enlightening conversations...

  15. Reionization and high-redshift galaxies: the view from quasar absorption lines

    E-Print Network [OSTI]

    Becker, George D; Lidz, Adam

    2015-01-01

    Determining when and how the first galaxies reionized the intergalactic medium (IGM) promises to shed light on both the nature of the first objects and the cosmic history of baryons. Towards this goal, quasar absorption lines play a unique role by probing the properties of diffuse gas on galactic and intergalactic scales. In this review we examine the multiple ways in which absorption lines trace the connection between galaxies and the IGM near the reionization epoch. We first describe how the Ly$\\alpha$ forest is used to determine the intensity of the ionizing ultraviolet background and the global ionizing emissivity budget. Critically, these measurements reflect the escaping ionizing radiation from all galaxies, including those too faint to detect directly. We then discuss insights from metal absorption lines into reionization-era galaxies and their surroundings. Current observations suggest a buildup of metals in the circumgalactic environments of galaxies over $z \\sim 6$ to 5, although changes in ionizati...

  16. Lyman Alpha Absorption in The Cosmic Web

    E-Print Network [OSTI]

    J. Richard Bond; James W. Wadsley

    1997-10-10

    We describe large scale structure at high redshift in terms of the Cosmic Web picture for {S,Lambda,O,H}CDM models: how galactic-scale ``peak-patches'', filaments and membranes create an interconnected intergalactic medium. The ideas are applied to our Ly$\\alpha$ forest simulations of ``shear-field patches''. We discuss simulation method and design, resolution dependence, the statistical combination of patches, UV flux scaling, and whether filtered Zel'dovich maps are useful. The response to changes in power spectrum shape and amplitude, and in cosmological parameters, is described. We also show Omega_b h^2 derived from UV rescaling is overestimated if the resolution is not adequate.

  17. A study of the breeding structure of the Aberdeen-Angus herd of the Agricultural and Mechanical College of Texas from 1906 to 1947 

    E-Print Network [OSTI]

    Wheat, John David

    1951-01-01

    SLrsg hy- 1 ' p rsr1ge of Ja gags ~hich ~ . e" a B Berrsai1'Outing mal~as for the t other sires ~ 1 his pal1ge 4a 8 bshe &d sj @lily QiehC geste'NOR poriocls whMoas the 9'Mls' four sires (based vtl GXs 50i FFi alai 6 geststio@s) ha@ ranges ef 8...~ ~ ~ ~ s i ~ ~ ~ ~ hibjiogx s, " hy Ae~o&1odgeesnt s 12 28 ~ . 30 32 3g ~ FiOVRRS 1a Xe544g Rlbl'ecting Coeffioi@llt Ce@) 0 t l ~ ~ I 4 4 ~ 0 0 'N 13 Teagle ~ Q@ Relationship {6@+1@@ p o s t ~ ~ ~ 'i ~ ~ ~ ~ s y 15 Yeaj. 'ly Gelvtng 1+ter'ee3. sxs...

  18. A study of Frechet and sequential spaces 

    E-Print Network [OSTI]

    Moore, Judy Hennessey

    1970-01-01

    !OS fhe 77T&&r!uei:7. V1. i:y Of I!he SisaCP. S. Xn I 1'll s 91"! a & f70 i&h: !P tr!rrtec!Ie I: &777&i, SP ttu ni. ". i ai. puop' I f1 Ps f !1 I oop jar. t'e'p. d 1&P. &7! & ]. &J&!&, !oust arri e jn l"xar&rple r! t hai t. 'h&1 p!. O&hrctr r oi' trr... point: y& CL )(s &'j' & (h&llo'. e j. . . !, (3 I'!] (j (3;) Iih n co&ls3(. ar&ll&g ( f& ) as a 'c:&IL&o). o;iica). ";I&ac(". , !Te 3&i'l. '!. (Ie&(oi:e a. poiTLL. in S(s, y) l&y (&:, ) ~:LL: S(s y) hl. , 1L&h suhspace t(&opo)o&Iy, then, ach poin...

  19. UV pumping of hyperfine transitions in the light elements, with application to 21-cm hydrogen and 92-cm deuterium lines from the early universe

    E-Print Network [OSTI]

    Leonid Chuzhoy; Paul R. Shapiro

    2006-06-30

    We present new analytic calculations of the coupling between ultraviolet resonance photons and the population of the hyperfine states in the light elements (H, D, He3+) which include several previously neglected physical processes. Among these are the backreaction of resonant scattering on the pumping radiation, the scattering of Ly_beta photons and the effect of local departure from pure Hubble flow. The application of the new treatment to the redshifted hydrogen 21 and deuterium 92 cm lines from the high-redshift universe results in an amplitude correction of up to an order of magnitude. We further show that the standard assumption that ultraviolet pumping drives the spin temperature towards the kinetic temperature does not hold for deuterium, whose spin temperature is generally negative.

  20. A NEW METHOD TO DIRECTLY MEASURE THE JEANS SCALE OF THE INTERGALACTIC MEDIUM USING CLOSE QUASAR PAIRS

    SciTech Connect (OSTI)

    Rorai, Alberto; Hennawi, Joseph F. [Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg (Germany); White, Martin [Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720-3411 (United States)

    2013-10-01

    Although the baryons in the intergalactic medium (IGM) trace dark matter fluctuations on megaparsec scales, on smaller scales ?100 kpc, fluctuations are suppressed because the finite temperature gas is pressure supported against gravity, analogous to the classical Jeans argument. This Jeans filtering scale, which quantifies the small-scale structure of the IGM, has fundamental cosmological implications. First, it provides a thermal record of heat injected by ultraviolet photons during cosmic reionization events, and thus constrains the thermal and reionization history of the universe. Second, the Jeans scale determines the clumpiness of the IGM, a critical ingredient in models of cosmic reionization. Third, it sets the minimum mass scale for gravitational collapse from the IGM, and hence plays a pivotal role in galaxy formation. Unfortunately, it is extremely challenging to measure the Jeans scale via the standard technique of analyzing purely longitudinal Ly? forest spectra, because the thermal Doppler broadening of absorption lines along the line-of-sight, is highly degenerate with Jeans smoothing. In this work, we show that the Jeans filtering scale can be directly measured by characterizing the coherence of correlated Ly? forest absorption in close quasar pairs, with separations small enough ?100 kpc to resolve it. We present a novel technique for this purpose, based on the probability density function (PDF) of phase angle differences of homologous longitudinal Fourier modes in close quasar pair spectra. A Bayesian formalism is introduced based on the phase angle PDF, and Markov Chain Monte Carlo techniques are used to characterize the precision of a hypothetical Jeans scale measurement, and explore degeneracies with other thermal parameters governing the IGM. A semi-analytical model of the Ly? forest is used to generate a large grid (500) of thermal models from a dark matter only simulation. Our full parameter study indicates that a realistic sample of only 20 close quasar pair spectra can pinpoint the Jeans scale to ? 5% precision, independent of the amplitude T{sub 0} and slope ? of the temperature-density relation of the IGM T=T{sub 0}(?/ ?-bar ){sup ?-1}. This exquisite sensitivity arises because even long-wavelength one-dimensional Fourier modes ?10 Mpc, i.e., two orders of magnitude larger than the Jeans scale, are nevertheless dominated by projected small-scale three-dimensional (3D) power. Hence phase angle differences between all modes of quasar pair spectra actually probe the shape of the 3D power spectrum on scales comparable to the pair separation. We show that this new method for measuring the Jeans scale is unbiased and is insensitive to a battery of systematics that typically plague Ly? forest measurements, such as continuum fitting errors, imprecise knowledge of the noise level and/or spectral resolution, and metal-line absorption.

  1. One Hundred Years Hence: Science Fiction & Fantasy at Texas A&M 

    E-Print Network [OSTI]

    Coker, Cait; Samuelson, Todd; Hall, Hal W.

    2010-01-01

    in t roduc t i on to a l i t erature that wou ld consume a l i fe t ime, H u g h Loft ing 's Doctor Do l i t t l e books. I remember a poster on the l i b r a r y wa l l of a w indow f r a m i n g a seascape and a legend quot ing J o h n K e a... ly. T h i s was i n the sleepy l i t t l e southeastern K a n s a s town of G i r a r d , where my father and his s ibl ings had grown up - at one t ime the pub l i sh ing center of the social ist press, p r i n t i ng 500,000 copies...

  2. Hierarchy theory, selection, and sorting: a phylogenetic perspective

    E-Print Network [OSTI]

    Lieberman, Bruce S.; Vrba, Elisabeth S.

    1995-01-01

    T he h ierarchica l s tructure o f n a t u r e h a s s e l d o m b e e n prominent ly emphasized in evolut ionary t h e o r y , a l though it has been recognized by a b r o a d range of evolut ionary biologists (e.g. , D o b z - h a n s k y 1 9 3 7... discuss h o w a phyloge­ net ic perspect ive can be used as a technique to study the hierarchica l s tructure o f nature . W e analyze h o w sort ing and select ion act at ievels in addit ion to those o f c lass ic organis - mic natura l se lect ion...

  3. Tagging the boll weevil (Anthonomus gradis Boh.) with P³² 

    E-Print Network [OSTI]

    Mayer, Marion Sidney

    1961-01-01

    of qptahs of PIL feil at ~ xate of 1D ac/al af a R5 Psx asst bags~ter so3utian by media?reaxed boll weeviis AMN6 ~l8 bacxe prior ta treatment ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 28 Bats af nptabs cf P3 f46 at a gate of 25 Qc/ml cl' a 25 per- cent bagmCjt~ter sot...N, at ~ sate af $. g re/a1 at d1atjllel. war ly yqasee-~ ba11 vaeriie starnkl 48 hood prior ta txeataeet. 1 4, 08a 2 6, 49' 6, 8~ 3 7, 639 8, 488 4, 8' 8, 048 8, 47k 11 041 12, 368 . 8 'able 4. Rate of uptake of P3 fe&l at a cate cf l. pf uc/ml cf a 10...

  4. Effects of hygromycin B feeding on the growing and laying performance of a commercial inbred cross laying stock 

    E-Print Network [OSTI]

    Llorico, Bayani Francisco

    1961-01-01

    ?br (1949) ~d a aixturo of LihonochLasino and ntootin~entonLte in drf nc?h and found it to bo au offc?tive ond prc?tisal aothod of ronovir~ osoarids snd oooal camas fron nacura1ly infeoted ohiokons. Levtc? (1938) found tube?so dust at a gq 4& 6 aod 8... that wore on tho basal diet. Those birds that reosived the diet oontaining 12 grs?N of LLL?gr?s?cL?xin B pex ton of feed started prodnotion earliest? laging the first egg at 11$ d?cats of age (Ta@e g, Mrds reoeiving 8 grass of ?ygraegein LL bsid the first...

  5. Determination of Young's modulus and mechanical damping as a function of temperature for depleted uranium-0.75 wt% titanium using the PUCOT 

    E-Print Network [OSTI]

    Keene, Keith Howard

    1986-01-01

    with the permission of the International Atomic Energy Agency, Chicago. 19. G t, A. d 1, k, K. , J 1 f ~A1' 6 ~98 ' . l. 27, tl . 6, J 1956, pp 583-593. 20. Granatop A. and Luecke, K. , Journal of A lied ~pt ~ ', l. 27, tl . 7, J ly 1956, pP 78 -885. ~Ct 1, J... 8 W'1 y d 5, 1 . , 17 2 k, 1952, p 197. 22. G t, A. d 6 I, K, J 1 f ~81' d ~pt ', 1. 52, tl . 12, G 8 1981, pp 7136-7142. 23. Bev er, M. B. , Ho 1 t, D. L. , and T i tchener, A. L. , The Stored ~Ener of Cold Work, Pergamon Press Ltd. , Oxford...

  6. Proceedings of Ninth Meeting of the ACL Special Interest Group in Computational Morphology and Phonology, pages 93100, Prague, June 2007. c 2007 Association for Computational Linguistics

    E-Print Network [OSTI]

    istic s U n iv e rsity o f N e w c a stle N e w c a stle u p o n T y n e N E 1 7 R U U n ite d K in g d a lly n o t b e e n a n d c u rre n tly is n o t a n issu e in w o rk o n e x p lo ra to ry m u ltiv a ria te a n a ly s is o f la n g u a g e c o rp o ra . H o w e v e r, th e p re s e n c e o f n o n lin

  7. Dark Matters Issue 3 

    E-Print Network [OSTI]

    ffi b'# .-sG#*" ffi ffi*,t"s ! \\(iftb&J\\@' Q-X ebfyeffib trevffi e i com? to the th;rd i sEU$ af nErk Matt?r As I mantisn|'C in ou last ii?ue, thiE ia hopeF,rl ly aur Filst that T have time to F!! 0M togeth?r. Scr trret yeu nry Fetlnw men... goo Finally, I hoDe that cir,.re the 0 trremier all l

  8. The standard potential of the iodate/iodine electrode 

    E-Print Network [OSTI]

    Spitz, Rodney Dwight

    1973-01-01

    & i inc e Ier)! 10, . 3& ilojr?)PSP of Tjr. ?&) }ion ? }'&Iui lih&)3u)&1 ')1 ' 01&3i c ic&datr) sr-1 i)t:. in?;= . I, estr&bli j&e &. JB' y S30&". 3& (2) t pa&cti- c"u3 a)c ?& Rt . & 0'&' 00)10Pn ' &"r. ?Ons of loc3). 0 dc'. ? ". ' '311 ) 1... xeaccion (15), The values obtained for the equilibxiun& constant of the Dushman reaction axe in good agreement !~i h the values deter!ai tie 3 c)&e-. !ical ly by pan~ s" t (1) . suthorc c!I shc's t 0 c'. ; ri . . '=' li- Bp, !3. . ' cis Cion to ti!c fc...

  9. THE CIRCUMGALACTIC MEDIUM OF MASSIVE GALAXIES AT z {approx} 3: A TEST FOR STELLAR FEEDBACK, GALACTIC OUTFLOWS, AND COLD STREAMS

    SciTech Connect (OSTI)

    Shen Sijing; Madau, Piero; Prochaska, J. Xavier [Department of Astronomy and Astrophysics, University of California, 1156 High Street, Santa Cruz, CA 95064 (United States); Guedes, Javiera [Institute for Astronomy, ETH Zurich, Wolgang-Pauli-Strasse 27, CH-8093 Zurich (Switzerland); Mayer, Lucio [Institute of Theoretical Physics, University of Zurich, Winterthurerstrasse 190, CH-9057 Zurich (Switzerland); Wadsley, James [Department of Physics and Astronomy, McMaster University, Hamilton, ON L8S 4M1 (Canada)

    2013-03-10

    We present new results on the kinematics, thermal and ionization state, and spatial distribution of metal-enriched gas in the circumgalactic medium (CGM) of massive galaxies at redshift {approx}3, using the Eris suite of cosmological hydrodynamic ''zoom-in'' simulations. The reference run adopts a blastwave scheme for supernova feedback that produces large-scale galactic outflows, a star formation recipe based on a high gas density threshold, metal-dependent radiative cooling, and a model for the diffusion of metals and thermal energy. The effect of the local UV radiation field is added in post-processing. The CGM (defined as all gas at R > 0.2 R{sub vir} = 10 kpc, where R{sub vir} is the virial radius) contains multiple phases having a wide range of physical conditions, with more than half of its heavy elements locked in a warm-hot component at T > 10{sup 5} K. Synthetic spectra, generated by drawing sightlines through the CGM, produce interstellar absorption-line strengths of Ly{alpha}, C II, C IV, Si II, and Si IV as a function of the galactocentric impact parameter (scaled to the virial radius) that are in broad agreement with those observed at high redshift by Steidel et al. The covering factor of absorbing material declines less rapidly with impact parameter for Ly{alpha} and C IV compared to C II, Si IV, and Si II, with Ly{alpha} remaining strong (W{sub Ly{alpha}} > 300 mA) to {approx}> 5 R{sub vir} = 250 kpc. Only about one third of all the gas within R{sub vir} is outflowing. The fraction of sightlines within one virial radius that intercept optically thick, N{sub H{sub I}}>10{sup 17.2} cm{sup -2} material is 27%, in agreement with recent observations by Rudie et al. Such optically thick absorption is shown to trace inflowing ''cold'' streams that penetrate deep inside the virial radius. The streams, enriched to metallicities above 0.01 solar by previous episodes of star formation in the main host and in nearby dwarfs, are the origin of strong (N{sub C{sub II}}>10{sup 13} cm{sup -2}) C II absorption with a covering factor of 22% within R{sub vir} and 10% within 2 R{sub vir}. Galactic outflows do not cause any substantial suppression of the cold accretion mode. The central galaxy is surrounded by a large O VI halo, with a typical column density N{sub O{sub VI}} {approx}> 10{sup 14} cm{sup -2} and a near unity covering factor maintained all the way out to 150 kpc. This matches the trends recently observed in star-forming galaxies at low redshift by Tumlinson et al. Our zoom-in simulations of this single system appear then to reproduce quantitatively the complex baryonic processes that determine the exchange of matter, energy, and metals between galaxies and their surroundings.

  10. HAPPENING THIS WEEK NEWSLETTER FOR MARCH 17TH-26TH

    E-Print Network [OSTI]

    Lawrence, Rick L.

    RSE OF THE pAST FivE yEARS THE pRiCE OF SOLAR ELECTRiC pANELS HAvE STEAdiLy dECREASEd ANd THE SOLAR ELECTRiC iNduSTRy HAS GROWN WHiCH HAS MAdE SOLAR AFFORdAbLE ANd ATTAiNAbLE. ATTENdEES WiLL LEARN THE AbOuT THE COMpONENTS OF A SOLAR ELECTRiC SySTEM, HOW NET-METERiNG WORkS, WHAT GOES iNTO AN iNSTALLATiON ANd HOW TO bENEFiT FROM

  11. Bronze Age Representations of Aegean Bull-Games, III

    E-Print Network [OSTI]

    Younger, John G.

    1995-01-01

    ttlen, !v{:iir tlrsir hltir l*ng {il*ntx 5? lPl. l.Xlnl.7fi l}}Y f"rr:sccl. ?{tl. Whitr-p*intetl leuperx itt fr*lco-;tr*rr.llrrr:rl thfrq:frlre tt.r b* rf,{rn}*rr. a}l lr*;rr theil }uir llrrrg ir{clrr{ 4},4V.57 lPl. i-Xlrr|, 7q,1**j. il{her leapcrs r...", uncastrated = "tauros"), he suggests "ta-to-mo" (l.e.. orcr0pQ) "at the farmstead" or "at pasture". E. DAVIS The Vapheio Cups and Aegean GoId and Silver Ware (1977),256-257 & passim, cat. 103; Sp. MARINATOS & M. HIRMER, Crete and Mycenae (1960), pls. 182...

  12. Comparison of the stress-strain relations of a real soil with those of a simulated soil under triaxial loading conditions 

    E-Print Network [OSTI]

    Lynch, Frank Lane

    1966-01-01

    . , thc; rr&ly muci Le ai c &c&& tc . rain later;& iy. 1;&c I oa i app' i . c & o, . ?c a& rcy in nore&?cn&, . cp 6&1&' cu&c ' l 1'rcm z'&c -irc-s +o z?point. vh. re failur&. : , &c& u?" F I u "' &. I 'I) . 2 3 I u c . ' ?' Dirc i as LI'&c i...'. " '1!lC ' 1L~JY 1IZSIIET VT . CO ~'ICLES1L"iS ', ll. I'Ill'Lol' Id SI:, ', IRCH RSCOI'""IR I!! I'TOES d I 'PS!d. '1'I' 'IUe S dpi'S!KTX 1'lIIISa YT L I!RES, 'IIET: C "PRE'IE Z E !R 7 '~I&pi! E o vi DIB'1' OF FIGURES l~ii ure Pa ge 2. 1...

  13. Statewide Air Emissions Calculations From Wind and Other Renewables: Summary Report 

    E-Print Network [OSTI]

    Haberl, J.; Liu, Z.; Baltazar, J.C.; Gilman, D.; Culp, C.; Yazdani, B.; Claridge, D.; Mao, C.; Sun, Y.; Narayanaswamy, A.; Do, S.; Kim, K.

    2011-01-01

    ort is intended to be the best availab le info rmatio n at the time of public a tio n. TEES make s no clai m or warr an ty, expr e s s or implied , that the repor t or data here in is necessar i l y error-f r e e . Referen c e he rein to any specific... commercial product, process, or service by trade name, trad ema r k, man u f acturer, or oth erwise, do es not constitu te or imp ly its end orseme n t, reco mme n d a tio n, or favor ing by the Energ y Syste ms Laborato r y or any of its emplo ye e...

  14. The production and characterization of protective monoclonal antibodies against Fasciola hepatica and Schistosoma mansoni 

    E-Print Network [OSTI]

    Hicks, Carolyn Sue

    1988-01-01

    -polyacrylamide gel dp t' ff ' 1 h~t' t'g 6A. Western blot analysis of monoclonal antibody A12 hdgtoF1h~ tg 6B. Western blot analysis of monoclonal antibody D4 h d g to ~F* 1 ~ht t g Page 71 71 73 73 74 74 75 77 77 79 81 83 83 Viii 6C. Western blot... b f t*d 'th P. ~ht' p 'ly by the ingestion of watercress comtaminated with metacercariae (Soulsby 1982) . F. hf~d(tica causes malaise, intermittent fever, weight loss, pain under the right 1 g', d ' ph'1' . b' g ' f P. h~t is by eggs...

  15. Karl Haushofer and his impact on the German-Japanese Alliance 

    E-Print Network [OSTI]

    Hayes, Tracey Michelle

    2004-01-01

    ~hips. Till!& i)if&in&cc crentcil;I L r itic;il ihrtt in the I&coen&onic b&liince op po?cr, r) ()I 0;it It&&&I&in ?uii in decl irre . '?&d thc I ?In. 'd httit(? ?;? ?I ihc It'1&rt&&tier?, 'll Ph'?0 01 L)cco&inn ' the hone?1()nrc f)?L(L'I' &)f the 1... distribution of stratc& &c opponunities in the ?&&rid ?. &s One&In;d Miichindcr's thesis, developed most I'ully in his I 71&7 book, D('n&&)('r(ir&(' i(ie(&i? &&)id R(*&&li&v, I')Lit cILai'ly stated in hi? l(704 Jniclc. "Thc Gco is&phic;il Pi) ot ol' Hi...

  16. Pedogenesis along a Climosequence in Loess-Derived Soils of the Central Great Plains

    E-Print Network [OSTI]

    Klopfenstein, Scott

    2014-05-31

    in th is s tu dy . Hi gh a nd lo w te m pe ra tu re s ar e gi ve n as th e ave ra ge n or m al h ig h an d lo w te m pe ra tu re s fo r th e m on th s of Ju ly a nd J an ua ry , re sp ec ti vel y. Soi l s e ri es c la ss if ic... na l s ta ti on s w it h ava il ab le n or m al va l ue s fr om 1981- 20 10 ( NCDC). b Int er po la t ed f ro m r eg io na l s ta ti on s w it h at le as t 80 c on se cu ti ve ye a rs o f pr ec ip it at io n da ta a va il ab le...

  17. EVIDENCE FOR A WEAK WIND FROM THE YOUNG SUN

    SciTech Connect (OSTI)

    Wood, Brian E.; Müller, Hans-Reinhard; Redfield, Seth; Edelman, Eric

    2014-02-01

    The early history of the solar wind has remained largely a mystery due to the difficulty of detecting winds around young stars that can serve as analogs for the young Sun. Here we report on the detection of a wind from the 500 Myr old solar analog ?{sup 1} UMa (G1.5 V), using spectroscopic observations from the Hubble Space Telescope. We detect H I Ly? absorption from the interaction region between the stellar wind and interstellar medium, i.e., the stellar astrosphere. With the assistance of hydrodynamic models of the ?{sup 1} UMa astrosphere, we infer a wind only half as strong as the solar wind for this star. This suggests that the Sun and solar-like stars do not have particularly strong coronal winds in their youth.

  18. Regmi Research Series ,Year 20, January, 1988

    E-Print Network [OSTI]

    Regmi, Mahesh C

    1988-01-01

    are· fixed, . others migrlltkory,' ~t1;vatora .pe:rpetually 9haIlgipg th~i.r abodes as . a.oo~ ae ;t"my ~v.e rai8e~ a crop or- two amid the .~shes: of .the . '-' burn~ forest. '-PP ~Ot!!8, again, prefer the r.~ar1ng of. ~h~ep .to. agricul:t;\\1I... sl.i~ ht D.sc~nt br ings y ol.! t o t he Na we KooI A, a muder&t~-siz0C s t r f;l Lm, which i s E';SCe nC6G f or 3 cos by a very bad r oad ~het cross~s thl;! lloulccr y iJ~L. of t n.:, r i Ver m£i 1:l.Y, times . Thenoo quitt ing t he l!..hola you...

  19. CONSTRAINING PRIMORDIAL MAGNETIC FIELDS THROUGH LARGE-SCALE STRUCTURE

    SciTech Connect (OSTI)

    Kahniashvili, Tina; Natarajan, Aravind; Battaglia, Nicholas [McWilliams Center for Cosmology and Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213 (United States); Maravin, Yurii [Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66506 (United States); Tevzadze, Alexander G., E-mail: tinatin@andrew.cmu.edu [Faculty of Exact and Natural Sciences, Javakhishvili Tbilisi State University, 3 Chavchavadze Avenue, Tbilisi 0128 (Georgia)

    2013-06-10

    We study primordial magnetic field effects on the matter perturbations in the universe. We assume magnetic field generation prior to the big bang nucleosynthesis (BBN), i.e., during the radiation-dominated epoch of the universe expansion, but do not limit analysis by considering a particular magnetogenesis scenario. Contrary to previous studies, we limit the total magnetic field energy density and not the smoothed amplitude of the magnetic field at large (of the order of 1 Mpc) scales. We review several cosmological signatures, such as halo abundance, thermal Sunyaev-Zel'dovich effect, and Ly{alpha} data. For a cross-check, we compare our limits with that obtained through the cosmic microwave background faraday rotation effect and BBN. The limits range between 1.5 nG and 4.5 nG for n{sub B} in (- 3; -1.5).

  20. Laser heating of solid matter by light pressure-driven shocks

    SciTech Connect (OSTI)

    Akli, K; Hansen, S B; Kemp, A J; Freeman, R R; Beg, F N; Clark, D; Chen, S; Hey, D; Highbarger, K; Giraldez, E; Green, J; Gregori, G; Lancaster, K; Ma, T; MacKinnon, A J; Norreys, P A; Patel, N; Patel, P; Shearer, C; Stephens, R B; Stoeckl, C; Storm, M; Theobald, W; Van Woerkom, L; Weber, R; Key, M H

    2007-05-04

    Heating by irradiation of a solid surface in vacuum with 5 x 10{sup 20} W cm{sup -2}, 0.8 ps, 1.05 {micro}m wavelength laser light is studied by x-ray spectroscopy of the K-shell emission from thin layers of Ni, Mo and V. A surface layer is heated to {approx} 5 keV with an axial temperature gradient of 0.6 {micro}m scale length. Images of Ni Ly{sub {alpha}} show the hot region has a {approx} 25 {micro}m diameter, much smaller than {approx} 70 {micro}m region of K{sub {alpha}} emission. 2D particle-in-cell (PIC) simulations suggest that the surface heating is due to a light pressure driven shock.

  1. An investigation of adaptability to physical and mental stress utilizing heart rate analysis 

    E-Print Network [OSTI]

    Berngen, Frank Edmund

    1968-01-01

    &)r Xl)e c, r ?Lro&lc:-. 4o kc c;) tj)c&r. s?c;):& d ):i?c) cxc'rci. sc: (1':i. ci?. e 1), 3'hc v. . i) e& fro c ti:? el?ctroie" w )rc %ice? co))))sc;;ad) to a s. ). a3 1. !LZ:&I tc. l &:n?ter I?&. trcu)sr))ittc. ") xude3. ; ". -33'6 -1:2 &v) i:h h&n t... sl rc&igh& v. '. &ilc doin? t!&is ex . ! cr&(c . Rea&ly, cx(. . I'!1'. ;. . (u}j& 3. ; u}&, 2;. . . u?, ]0)", '} rc&pare for s! t-'. ;Is. Rc31 over o;1 your hncl. v&itll yo!r fe&'l agc. i!'= 4 t]u" o?tjj v(. 1 ' e&j'!& yc!&r ilal. &: 3;!s}&&'(1 he...

  2. The influence of nitrogen rate and source on plant and soil properties 

    E-Print Network [OSTI]

    Fisher, Flake Leroy

    1959-01-01

    1000 pounds added. This d if fe ren ce in rate of in c rea se was thought to be due to gaseous lo s s o f nitrogen fr om the ammonia p lo ts . A lkali so luble nitrogen was in c rea sed approx im ate ly 250 and 200 pounds fo r each 1 0 0 0... stubble of 2 1 /2 to 3 in ches rem a ined . The harvested m a ter ia l was caught in a c o l le c t io n pan attached to the trailing edge of the cutter b a r . The f r e sh weight o f the fo ra g e p rodu ced on a 2 .5 by 17 .5 fo o...

  3. Karyotypic variation in the Peromyscus boylii species group in western Mexico 

    E-Print Network [OSTI]

    Davis, Kathleen Marie

    1988-01-01

    heterochromatic short arm. The Y was a small submetacentric chromosome. 22 11 4. ? -ch o 1 Hhht f P. h. 1 '0* ~1 ~h' fo to 1 H ' t ' ' ' f chromosomes 1, 2, and 22. Fxact robabilities (P) of fo t ~td H d ? W ' 5 ~t 1 1 t 0 ~d' to H 1d (1954). P&. 05 th 't...) further suggest that this form is not * t' * 'th pop 1 t' *f bl* to P. ~2 (PN=56-60) d th t ~1 ' * d** *t lht g d th ~1'. A h, th PN=56 fo ' 1'k*ly to 5 p 'f' lly d' t t f o P ~1* ' . Ph po fbi* association between the FN=56 forms from Michoacan...

  4. The importance of vitamin B12 and unidentified factors in the nutrition of the domestic fowl 

    E-Print Network [OSTI]

    Olcese, Orlando

    1950-01-01

    A THE IMPORTANCE OF VITAMIN B12 AND UNIDENTIFIED FACTORS IN THE NUTRITION OF THE DOMESTIC FOWL A Dissertation By ORLANDO OLCESE Approved as to style "alkl content by T Chairman of Committee THE IMPORTANCE OP VITAMIN Blg AND UNIDENTIFIED... Subject: Biochemistry and Nutrition 1950 D 4-3 THEIMPORANRCRIF V FB1 2DUBSW LisB1s US 1erW1ss Bis sita1W1 oW2UiUDn1 2tn 2rrW1ai2p UiSt US AWv dy ly HSDaB "SW Bis oDin2ta1 2tn 1taSDW2o1k1tU it UB1 aSDWs1 S" UBis LSWcv US AWy H2Wb Cy Ohk2t "SW Bis B1...

  5. Willa Cather and a technologically oriented, urbanized America: encounter and retreat 

    E-Print Network [OSTI]

    Calhoun, Ruth Huston

    1968-01-01

    . ! t, il". I V in 'uilC I'4 -:t( r. " Of tliC 4! rit?, ' 8tatea (40 ln:i "', c: Br(Q r! i! I!!i . , I''ilc& li I 0 r13en! 0031 ( &!area(3 L ('1' cero. l 8 bc 3'. L, i ntifte&I- ? a 0 rr . r. r-. , etc" Mhtch conic'. t!0 0(u=:0. -. 'be('! "Lh arr... Ld Lip&r avo(1 ! cilll! I . ' I:i onio oi c-. i I 1 0 Ir&el i-bc. jr!: Y:as riot r, :r-rc;ly p]i ?;r'i. in-l, lllorad ' '! 'i ';&a", rlo L 1!!e j eJ y po?. 'eo ie, . I: 1 4 I'!!4" L] cell& . '(l, l . '". 011:r'co 0' c 1 v:i 0 vj!0 11(l; fi U, 'u...

  6. HST/COS SPECTRA OF THREE QSOs THAT PROBE THE CIRCUMGALACTIC MEDIUM OF A SINGLE SPIRAL GALAXY: EVIDENCE FOR GAS RECYCLING AND OUTFLOW

    SciTech Connect (OSTI)

    Keeney, Brian A.; Stocke, John T.; Danforth, Charles W.; Shull, J. Michael; Green, James C. [Center for Astrophysics and Space Astronomy, Department of Astrophysical and Planetary Sciences, University of Colorado, 389 UCB, Boulder, CO 80309 (United States)] [Center for Astrophysics and Space Astronomy, Department of Astrophysical and Planetary Sciences, University of Colorado, 389 UCB, Boulder, CO 80309 (United States); Rosenberg, Jessica L. [Department of Physics and Astronomy, George Mason University, Fairfax, VA 22030 (United States)] [Department of Physics and Astronomy, George Mason University, Fairfax, VA 22030 (United States); Ryan-Weber, Emma V. [Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Mail H30, P.O. Box 218, Hawthorn, 3122 VIC (Australia)] [Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Mail H30, P.O. Box 218, Hawthorn, 3122 VIC (Australia); Savage, Blair D., E-mail: brian.keeney@colorado.edu [Department of Astronomy, University of Wisconsin-Madison, 5534 Sterling Hall, 475 North Charter Street, Madison, WI 53706 (United States)

    2013-03-01

    We have used the Cosmic Origins Spectrograph (COS) to obtain far-UV spectra of three closely spaced QSO sight lines that probe the circumgalactic medium (CGM) of an edge-on spiral galaxy, ESO 157-49, at impact parameters of 74 and 93 h {sup -1} {sub 70} kpc near its major axis and 172 h {sup -1} {sub 70} kpc along its minor axis. H I Ly{alpha} absorption is detected at the galaxy redshift in the spectra of all three QSOs, and metal lines of Si III, Si IV, and C IV are detected along the two major-axis sight lines. Photoionization models of these clouds suggest metallicities close to the galaxy metallicity, cloud sizes of {approx}1 kpc, and gas masses of {approx}10{sup 4} M {sub Sun }. Given the high covering factor of these clouds, ESO 157-49 could harbor {approx}2 Multiplication-Sign 10{sup 9} M {sub Sun} of warm CGM gas. We detect no metals in the sight line that probes the galaxy along its minor axis, but gas at the galaxy metallicity would not have detectable metal absorption with ionization conditions similar to the major-axis clouds. The kinematics of the major-axis clouds favor these being portions of a 'galactic fountain' of recycled gas, while two of the three minor-axis clouds are constrained geometrically to be outflowing gas. In addition, one of our QSO sight lines probes a second more distant spiral, ESO 157-50, along its major axis at an impact parameter of 88 h {sup -1} {sub 70} kpc. Strong H I Ly{alpha} and C IV absorption only are detected in the QSO spectrum at the redshift of ESO 157-50.

  7. THE He II POST-REIONIZATION EPOCH: HST/COS OBSERVATIONS OF THE QUASAR HS1700+6416

    SciTech Connect (OSTI)

    Syphers, David; Shull, J. Michael, E-mail: david.syphers@colorado.edu, E-mail: michael.shull@colorado.edu [CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309 (United States)

    2013-03-10

    The reionization epoch of singly ionized helium (He II) is believed to start at redshifts z {approx} 3.5-4 and be nearly complete by z {approx_equal} 2.7. We explore the post-reionization epoch with far-ultraviolet spectra of the bright, high-redshift quasar HS1700+6416 taken by the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope, which show strong He II ({lambda}303.78) absorption shortward of the QSO redshift, z{sub QSO} = 2.75. We discuss these data as they probe the post-reionization history of He II and the local ionization environment around the quasar and transverse to the line of sight, finding that quasars are likely responsible for much of the ionization. We compare previous spectra taken by the Far-Ultraviolet Spectroscopic Explorer to the current COS data, which have a substantially higher signal-to-noise ratio. The Gunn-Peterson trough recovers at lower redshifts, with the effective optical depth falling from {tau}{sub eff} {approx_equal} 1.8 at z {approx} 2.7 to {tau}{sub eff} {approx_equal} 0.7 at z {approx} 2.3, higher than has been reported in earlier work. We see an interesting excess of flux near the He II Ly{alpha} break, which could be quasar line emission, although likely not He II Ly{alpha}. We present spectra of four possible transverse-proximity quasars, although the UV hardness data are not of sufficient quality to say if their effects are seen along the HS1700 sightline.

  8. Active Galactic Nuclei in the CNOC2 Field Galaxy Redshift Survey

    E-Print Network [OSTI]

    Patrick B. Hall; H. K. C. Yee; Huan Lin; Simon L. Morris; David R. Patton; Marcin Sawicki; Charles W. Shepherd; Gregory D. Wirth; R. G. Carlberg; Richard Elston

    2000-07-12

    We present a sample of 47 confirmed and 14 candidate Active Galactic Nuclei (AGN) discovered in the Canadian Network for Observational Cosmology field galaxy redshift survey (CNOC2). The sample consists of 38 objects identified from broad emission lines, 8 from narrow [NeV] emission, and 15 candidates from FeII or MgII absorption lines, one of which has been confirmed as a broad-line AGN via infrared spectroscopy. Redshifts of these AGN range from z=0.27 to z=4.67, and the average absolute magnitude is M_B=-22.25. No color selection criteria were involved in selecting this spectroscopically discovered sample. The sample is also unbiased against objects with luminous host galaxies since the spectroscopy preferentially targeted extended objects. Simple color-color diagram selection criteria can recover 81+-6% of the CNOC2 AGN, but several of the most unusual objects would be missing from such a color-selected sample. In the subsample with broad emission lines, the average equivalent widths for MgII and CIII] agree with the predictions of previous studies of the Baldwin effect. However, the average equivalent widths for CIV and Ly-alpha are smaller than predicted by previous studies of the Baldwin effect at lower redshift. This may imply that the slopes of the CIV and Ly-alpha Baldwin effects evolve with redshift, steepening with cosmic time. The broad emission line AGN also show a higher incidence of associated MgII and CIV absorption than in most previous surveys. This may arise from strong absorption being anti-correlated with optical luminosity or becoming less frequent with cosmic time, or possibly because our selection method is not biased against objects with resolved spatial structure or reddened by dust associated with the absorbing gas. (Abridged)

  9. Ultraviolet Broad Absorption Features and the Spectral Energy Distribution of the QSO PG 1351+64

    E-Print Network [OSTI]

    W. Zheng; G. A. Kriss; J. X. Wang; M. Brotherton; W. R. Oegerle; W. P. Blair; A. F. Davidsen; R. F. Green; J. B. Hutchings; M. E. Kaiser

    2001-07-30

    We present a moderate-resolution (~20 km/s) spectrum of the mini broad-absorption-line QSO PG1351+64 between 915-1180 A, obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE). Additional spectra at longer wavelengths were also obtained with the HST and ground-based telescopes. Broad absorption is present on the blue wings of CIII 977, Ly-beta, OVI 1032,1038, Ly-alpha, NV 1238,1242, SiIV 1393,1402, and CIV 1548,1450. The absorption profile can be fitted with five components at velocities of ~ -780, -1049, -1629, -1833, and -3054 km/s with respect to the emission-line redshift of z = 0.088. All the absorption components cover a large fraction of the continuum source as well as the broad-line region. The OVI emission feature is very weak, and the OVI/Lyalpha flux ratio is 0.08, one of the lowest among low-redshift active galaxies and QSOs. The UV continuum shows a significant change in slope near 1050 A in the restframe. The steeper continuum shortward of the Lyman limit extrapolates well to the observed weak X-ray flux level. The absorbers' properties are similar to those of high-redshift broad absorption-line QSOs. The derived total column density of the UV absorbers is on the order of 10^21 cm^-2, unlikely to produce significant opacity above 1 keV in the X-ray. Unless there is a separate, high-ionization X-ray absorber, the QSO's weak X-ray flux may be intrinsic. The ionization level of the absorbing components is comparable to that anticipated in the broad-line region, therefore the absorbers may be related to broad-line clouds along the line of sight.

  10. Constraints on (Omega_m,Omega_Lambda) using distributions of inclination angles for high redshift filaments

    E-Print Network [OSTI]

    M. Weidinger; P. Moller; J. P. U. Fynbo; B. Thomsen; M. P. Egholm

    2002-05-24

    In this paper we present a scale free method to determine the cosmological parameters (Omega_m, Omega_Lambda). The method is based on the requirement of isotropy of the distribution of orientations of cosmological filaments. The current structure formation paradigm predicts that the first structures to form are voids and filaments, causing a web-like structure of the matter distribution at high redshifts. Recent observational evidence suggests that the threads, or filaments, of the cosmic web most easily are mapped in Ly-alpha emission. We describe how such a 3D map can be used to constrain the cosmological parameters in a way which, contrary to most other cosmological tests, does not require the use of a standard rod or a standard candle. We perform detailed simulations in order to define the optimal survey parameters for the definition of an observing programme aimed to address this test, and to investigate how statistical and observational errors will influence the results. We conclude that observations should target filaments of comoving size 15-50 Mpc in the redshift range 2-4, and that each filament must be defined by at least four Ly-alpha emitters. Detection of 20 filaments will be sufficient to obtain a result, while 50 filaments will make it possible to place significant new constraints on the values of Omega_m and Omega_Lambda permitted by the current supernova observations. In a future paper we study how robust these conclusions are to systematic velocities in the survey box.

  11. LOW IONIZATION STATE PLASMA IN CORONAL MASS EJECTIONS

    SciTech Connect (OSTI)

    Lee, Jin-Yi [Department of Astronomy and Space Science, Kyung Hee University, Yongin, Gyeonggi 446-701 (Korea, Republic of); Raymond, John C. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)

    2012-10-20

    The Ultraviolet Coronagraph Spectrometer (UVCS) on board the Solar and Heliospheric Observatory often observes low ionization state coronal mass ejection (CME) plasma at ultraviolet wavelengths. The CME plasmas are often detected in O VI (3 Multiplication-Sign 10{sup 5} K), C III (8 Multiplication-Sign 10{sup 4} K), Ly{alpha}, and Ly{beta}, with the low ionization plasma confined to bright filaments or blobs that appear in small segments of the UVCS slit. On the other hand, in situ observations by the Solar Wind Ion Composition Spectrometer on board Advanced Composition Explorer (ACE) have shown mostly high ionization state plasmas in the magnetic clouds in interplanetary coronal mass ejection (ICME) events, while low ionization states are rarely seen. In this analysis, we investigate whether the low ionization state CME plasmas observed by UVCS occupy small enough fractions of the CME to be consistent with the small fraction of ACE ICMEs that show low ionization plasma, or whether the CME plasma must be further ionized after passing the UVCS slit. To do this, we determine the covering factors of low ionization state plasma for 10 CME events. We find that the low ionization state plasmas in CMEs observed by UVCS show average covering factors below 10%. This indicates that the lack of low ionization state ICME plasmas observed by the ACE results from a small probability that the spacecraft passes through a region of low ionization plasma. We also find that the low ionization state plasma covering factors in faster CMEs are smaller than in slower CMEs.

  12. Water vapor distribution in protoplanetary disks

    SciTech Connect (OSTI)

    Du, Fujun; Bergin, Edwin A.

    2014-09-01

    Water vapor has been detected in protoplanetary disks. In this work, we model the distribution of water vapor in protoplanetary disks with a thermo-chemical code. For a set of parameterized disk models, we calculate the distribution of dust temperature and radiation field of the disk with a Monte Carlo method, and then solve the gas temperature distribution and chemical composition. The radiative transfer includes detailed treatment of scattering by atomic hydrogen and absorption by water of Ly? photons, since the Ly? line dominates the UV spectrum of accreting young stars. In a fiducial model, we find that warm water vapor with temperature around 300 K is mainly distributed in a small and well-confined region in the inner disk. The inner boundary of the warm water region is where the shielding of UV field due to dust and water itself become significant. The outer boundary is where the dust temperature drops below the water condensation temperature. A more luminous central star leads to a more extended distribution of warm water vapor, while dust growth and settling tends to reduce the amount of warm water vapor. Based on typical assumptions regarding the elemental oxygen abundance and the water chemistry, the column density of warm water vapor can be as high as 10{sup 22} cm{sup –2}. A small amount of hot water vapor with temperature higher than ?300 K exists in a more extended region in the upper atmosphere of the disk. Cold water vapor with temperature lower than 100 K is distributed over the entire disk, produced by photodesorption of the water ice.

  13. BEAM DYNAMICS IN NS-FFAG EMMAWITH DYNAMICAL MAPS

    E-Print Network [OSTI]

    Giboudot, Y; Edgecock, R; Wolski, A

    2010-01-01

    The Non Scal­ing Fixed Field Al­ter­nat­ing Gra­di­ent EMMA has a com­pact lin­ear lat­tice. Ef­fect of Fringe Field on the beam has to be stud­ied care­ful­ly. A nu­mer­i­cal mag­net­ic field map is gen­er­at­ed by mag­net mea­sure­ments or mag­net de­sign soft­wares. We de­vel­oped a tech­nique that pro­duces from the nu­mer­i­cal field map, a dy­nam­i­cal map for a par­ti­cle trav­el­ling in the en­tire EMMA cell for a ref­er­ence en­er­gy with­out ac­cel­er­a­tion. Since the beam dy­nam­ics change with en­er­gy, a set of maps have been pro­duce with dif­fer­ent ref­er­ence en­er­gies be­tween 10 and 20MeV. For each ref­er­ence en­er­gy, sim­u­lat­ed tune and time of flight (TOF) have been com­pared with re­sults in Zgoubi - track­ing di­rect­ly through nu­mer­i­cal field map. The range of va­lid­i­ty of a sin­gle map has been in­ves­ti­gat­ed by track­ing par­ti­cle with large en­er­gy de­vi­a­tion. From that, a ...

  14. Triptolide, a diterpenoid triepoxide, induces antitumor proliferation via activation of c-Jun NH{sub 2}-terminal kinase 1 by decreasing phosphatidylinositol 3-kinase activity in human tumor cells

    SciTech Connect (OSTI)

    Miyata, Yoshiki [Department of Biochemistry and Molecular Biology, Tokyo University of Pharmacy and Life Science, School of Pharmacy, Hachioji, Tokyo 192-0392 (Japan); Sato, Takashi [Department of Biochemistry and Molecular Biology, Tokyo University of Pharmacy and Life Science, School of Pharmacy, Hachioji, Tokyo 192-0392 (Japan)]. E-mail: satotak@ps.toyaku.ac.jp; Ito, Akira [Department of Biochemistry and Molecular Biology, Tokyo University of Pharmacy and Life Science, School of Pharmacy, Hachioji, Tokyo 192-0392 (Japan)

    2005-11-04

    Triptolide, a diterpenoid triepoxide extracted from the Chinese herb Tripterygium wilfordii Hook f., exerts antitumorigenic actions against several tumor cells, but the intracellular target signal molecule(s) for this antitumorigenesis activity of triptolide remains to be identified. In the present study, we demonstrated that triptolide, in a dose-dependent manner, inhibited the proliferation of human fibrosarcoma HT-1080, human squamous carcinoma SAS, and human uterine cervical carcinoma SKG-II cells. In addition, triptolide was found to decrease phosphatidylinositol 3-kinase (PI3K) activity. A PI3K inhibitor, LY-294002, mimicked the triptolide-induced antiproliferative activity in HT-1080, SAS, and SKG-II cells. There was no change in the activity of Akt or protein kinase C (PKC), both of which are downstream effectors in the PI3K pathway. Furthermore, the phosphorylation of Ras, Raf, and mitogen-activated protein/extracellular signal-regulated kinase 1/2 was not modified in HT-1080 cells treated with triptolide. However, the phosphorylation of c-Jun NH{sub 2}-terminal kinase 1 (JNK1) was found to increase in both triptolide- and LY-294002-treated cells. Furthermore, the triptolide-induced inhibition of HT-1080 cell proliferation was not observed by JNK1 siRNA-treatment. These results provide novel evidence that PI3K is a crucial target molecule in the antitumorigenic action of triptolide. They further suggest a possible triptolide-induced inhibitory signal for tumor cell proliferation that is initiated by the decrease in PI3K activity, which in turn leads to the augmentation of JNK1 phosphorylation via the Akt and/or PKC-independent pathway(s). Moreover, it is likely that the activation of JNK1 is required for the triptolide-induced inhibition of tumor proliferation.

  15. Reconstitution of the cellular response to DNA damage in vitro using damage-activated extracts from mammalian cells

    SciTech Connect (OSTI)

    Roper, Katherine; Coverley, Dawn

    2012-03-10

    In proliferating mammalian cells, DNA damage is detected by sensors that elicit a cellular response which arrests the cell cycle and repairs the damage. As part of the DNA damage response, DNA replication is inhibited and, within seconds, histone H2AX is phosphorylated. Here we describe a cell-free system that reconstitutes the cellular response to DNA double strand breaks using damage-activated cell extracts and naieve nuclei. Using this system the effect of damage signalling on nuclei that do not contain DNA lesions can be studied, thereby uncoupling signalling and repair. Soluble extracts from G1/S phase cells that were treated with etoposide before isolation, or pre-incubated with nuclei from etoposide-treated cells during an in vitro activation reaction, restrain both initiation and elongation of DNA replication in naieve nuclei. At the same time, H2AX is phosphorylated in naieve nuclei in a manner that is dependent upon the phosphatidylinositol 3-kinase-like protein kinases. Notably, phosphorylated H2AX is not focal in naieve nuclei, but is evident throughout the nucleus suggesting that in the absence of DNA lesions the signal is not amplified such that discrete foci can be detected. This system offers a novel screening approach for inhibitors of DNA damage response kinases, which we demonstrate using the inhibitors wortmannin and LY294002. -- Highlights: Black-Right-Pointing-Pointer A cell free system that reconstitutes the response to DNA damage in the absence of DNA lesions. Black-Right-Pointing-Pointer Damage-activated extracts impose the cellular response to DNA damage on naieve nuclei. Black-Right-Pointing-Pointer PIKK-dependent response impacts positively and negatively on two separate fluorescent outputs. Black-Right-Pointing-Pointer Can be used to screen for inhibitors that impact on the response to damage but not on DNA repair. Black-Right-Pointing-Pointer LY294002 and wortmannin demonstrate the system's potential as a pathway focused screening approach.

  16. Neutral interstellar hydrogen in the inner heliosphere under the influence of wavelength-dependent solar radiation pressure

    E-Print Network [OSTI]

    S. Tarnopolski; M. Bzowski

    2008-12-04

    With the plethora of detailed results from heliospheric missions and at the advent of the first mission dedicated IBEX, we have entered the era of precision heliospheric studies. Interpretation of these data require precision modeling, with second-order effects quantitatively taken into account. We study the influence of the non-flat shape of the solar Ly-alpha line on the distribution of neutral interstellar H in the inner heliosphere. Based on available data, we (i) construct a model of evolution for the solar Ly-alpha line profile with solar activity, (ii) modify an existing test-particle code used to calculate the distribution of neutral interstellar H in the inner heliosphere so that it takes the dependence of radiation pressure on radial velocity into account, and (iii) compare the results of the old and new version. Discrepancies between the classical and Doppler models appear between ~5 and ~3 AU and increase towards the Sun from a few percent to a factor of 1.5 at 1 AU. The classical model overestimates the density everywhere except for a ~60-degr cone around the downwind direction, where a density deficit appears. The magnitude of the discrepancies appreciably depends on the phase of the solar cycle, but only weakly on the parameters of the gas at the termination shock. For in situ measurements of neutral atoms performed at ~1 AU, the Doppler correction will need to be taken into account, because the modifications include both the magnitude and direction of the local flux by a few km/s and degrees, respectively, which, when unaccounted for, would introduce an error of a few km/s and degrees in determination of the magnitude and direction of the bulk velocity vector at the termination shock.

  17. A HUBBLE SPACE TELESCOPE/COSMIC ORIGINS SPECTROGRAPH SEARCH FOR WARM-HOT BARYONS IN THE Mrk 421 SIGHT LINE

    SciTech Connect (OSTI)

    Danforth, Charles W.; Stocke, John T.; Keeney, Brian A.; Penton, Steven V.; Shull, J. Michael; Yao Yangsen; Green, James C., E-mail: danforth@colorado.edu [CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, 389-UCB, Boulder, CO 80309 (United States)

    2011-12-10

    Thermally broadened Ly{alpha} absorbers (BLAs) offer an alternate method to using highly ionized metal absorbers (O VI, O VII, etc.) to probe the warm-hot intergalactic medium (WHIM, T = 10{sup 5}-10{sup 7} K). Until now, WHIM surveys via BLAs have been no less ambiguous than those via far-UV and X-ray metal-ion probes. Detecting these weak, broad features requires background sources with a well-characterized far-UV continuum and data of very high quality. However, a recent Hubble Space Telescope/Cosmic Origins Spectrograph (COS) observation of the z = 0.03 blazar Mrk 421 allows us to perform a metal-independent search for WHIM gas with unprecedented precision. The data have high signal-to-noise ratio (S/N Almost-Equal-To 50 per {approx}20 km s{sup -1} resolution element) and the smooth, power-law blazar spectrum allows a fully parametric continuum model. We analyze the Mrk 421 sight line for BLA absorbers, particularly for counterparts to the proposed O VII WHIM systems reported by Nicastro et al. based on Chandra/Low Energy Transmission Grating observations. We derive the Ly{alpha} profiles predicted by the X-ray observations. The S/N of the COS data is high (S/N Almost-Equal-To 25 pixel{sup -1}), but much higher S/N can be obtained by binning the data to widths characteristic of the expected BLA profiles. With this technique, we are sensitive to WHIM gas over a large (N{sub H}, T) parameter range in the Mrk 421 sight line. We rule out the claimed Nicastro et al. O VII detections at their nominal temperatures (T {approx} 1-2 Multiplication-Sign 10{sup 6} K) and metallicities (Z = 0.1 Z{sub Sun }) at {approx}> 2{sigma} level. However, WHIM gas at higher temperatures and/or higher metallicities is consistent with our COS non-detections.

  18. Halo mass dependence of H I and O VI absorption: evidence for differential kinematics

    SciTech Connect (OSTI)

    Mathes, Nigel L.; Churchill, Christopher W.; Nielsen, Nikole M.; Trujillo-Gomez, Sebastian [New Mexico State University, Las Cruces, NM 88003 (United States); Kacprzak, Glenn G. [Swinburne University of Technology, Victoria 3122 (Australia); Charlton, Jane; Muzahid, Sowgat [The Pennsylvania State University, University Park, PA 16802 (United States)

    2014-09-10

    We studied a sample of 14 galaxies (0.1 < z < 0.7) using HST/WFPC2 imaging and high-resolution HST/COS or HST/STIS quasar spectroscopy of Ly?, Ly?, and O VI ??1031, 1037 absorption. The galaxies, having 10.8 ? log (M {sub h}/M {sub ?}) ? 12.2, lie within D = 300 kpc of quasar sightlines, probing out to D/R {sub vir} = 3. When the full range of M {sub h} and D/R {sub vir} of the sample are examined, ?40% of the H I absorbing clouds can be inferred to be escaping their host halo. The fraction of bound clouds decreases as D/R {sub vir} increases such that the escaping fraction is ?15% for D/R {sub vir} < 1, ?45% for 1 ? D/R {sub vir} < 2, and ?90% for 2 ? D/R {sub vir} < 3. Adopting the median mass log M {sub h}/M {sub ?} = 11.5 to divide the sample into 'higher' and 'lower' mass galaxies, we find a mass dependency for the hot circumgalactic medium kinematics. To our survey limits, O VI absorption is found in only ?40% of the H I clouds in and around lower mass halos as compared to ?85% around higher mass halos. For D/R {sub vir} < 1, lower mass halos have an escape fraction of ?65%, whereas higher mass halos have an escape fraction of ?5%. For 1 ? D/R {sub vir} < 2, the escape fractions are ?55% and ?35% for lower mass and higher mass halos, respectively. For 2 ? D/R {sub vir} < 3, the escape fraction for lower mass halos is ?90%. We show that it is highly likely that the absorbing clouds reside within 4R {sub vir} of their host galaxies and that the kinematics are dominated by outflows. Our finding of 'differential kinematics' is consistent with the scenario of 'differential wind recycling' proposed by Oppenheimer et al. We discuss the implications for galaxy evolution, the stellar to halo mass function, and the mass-metallicity relationship of galaxies.

  19. An HST COS 'SNAPSHOT' spectrum of the K supergiant ? Vel (K4Ib-II)

    SciTech Connect (OSTI)

    Carpenter, Kenneth G. [NASA/GSFC Code 667, Greenbelt, MD 20771 (United States); Ayres, Thomas R. [University of Colorado, CASA, 389-UCB, Boulder, CO 80309 (United States); Harper, Graham M. [School of Physics, Trinity College, Dublin 2 (Ireland); Kober, Gladys; Nielsen, Krister E.; Wahlgren, Glenn M., E-mail: Kenneth.G.Carpenter@nasa.gov [Deptartment of Physics, Catholic University of America, Washington, DC 20064 (United States)

    2014-10-10

    We present a far-ultraviolet spectrum of the K4 Ib-II supergiant ? Vel obtained with the Hubble Space Telescope's Cosmic Origins Spectrograph (COS) as a part of the SNAPshot program 'SNAPing coronal iron' (GO 11687). The observation covers a wavelength region (1326-1467 Å) not previously recorded for ? Vel at a spectral resolving power of R ? 20,000 and displays strong emission and absorption features, superposed on a bright chromospheric continuum. Fluorescent excitation is responsible for much of the observed emission, mainly powered by strong H I Ly? and the O I (UV 2) triplet emission near ?1304. The molecular CO and H{sub 2} fluorescences are weaker than in the early-K giant ? Boo while the Fe II and Cr II lines, also pumped by H I Ly?, are stronger in ? Vel. This pattern of relative line strengths between the two stars is explained by the lower iron-group element abundance in ? Boo, which weakens that star's Fe II and Cr II emission without reducing the molecular fluorescences. The ? Vel spectrum shows fluorescent Fe II, Cr II, and H{sub 2} emission similar to that observed in the M supergiant ? Ori, but more numerous well-defined narrow emissions from CO. The additional CO emissions are visible in the spectrum of ? Vel since that star does not have the cool, opaque circumstellar shells that surround ? Ori and produce broad circumstellar CO (A-X) band absorptions that hide those emissions in the cooler star. The presence of Si IV emission in ? Vel indicates a ?8 × 10{sup 4} K plasma that is mixed into the cooler chromosphere. Evidence of the stellar wind is seen in the C II ??1334,1335 lines and in the blueshifted Fe II and Ni II wind absorption lines. Line modeling using Sobolev with Exact Integration for the C II lines indicates a larger terminal velocity (?45 versus ?30 km s{sup –1}) and turbulence (?27 versus <21 km s{sup –1}) with a more quickly accelerating wind (? = 0.35 versus 0.7) at the time of this COS observation in 2010 than derived from Goddard High Resolution Spectrograph data obtained in 1994. The Fe II and Ni II absorptions are blueshifted by 7.6 km s{sup –1} relative to the chromospheric emission, suggesting formation in lower levels of the accelerating wind and their widths indicate a higher turbulence in the ? Vel wind compared to ? Ori.

  20. High Power Coax Window

    SciTech Connect (OSTI)

    Neubauer, M. L.; Dudas, A.; Sah, R.; Elliott, T. S.; Rimmer, R. A.; Stirbet, M. S.

    2010-05-23

    A su­per­con­duct­ing RF (SRF) power cou­pler ca­pa­ble of han­dling 500 kW CW RF power is re­quired for pre­sent and fu­ture stor­age rings and linacs. There are over 35 cou­pler de­signs for SRF cav­i­ties rang­ing in fre­quen­cy from 325 to 1500 MHz. Cou­pler win­dows vary from cylin­ders to cones to disks, and RF power cou­plers are lim­it­ed by the abil­i­ty of ce­ram­ic win­dows to with­stand the stress­es due to heat­ing and me­chan­i­cal flex­ure. We pro­pose a novel ro­bust co-ax­i­al SRF cou­pler de­sign which uses com­pressed win­dow tech­nol­o­gy. This tech­nol­o­gy will allow the use of high­ly ther­mal­ly con­duc­tive ma­te­ri­als for cryo­genic win­dows. Using com­pressed win­dow tech­niques on disk co-ax­i­al win­dows will make sig­nif­i­cant im­prove­ments in the power han­dling of SRF cou­plers. We pre­sent the bench test re­sults of two win­dow as­sem­blies back to back, as well as in­di­vid­u­al win­dow VSWR in EIA3.125 coax. A vac­u­um test as­sem­bly was made and the win­dows baked out at 155C. The pro­cess­es used to build win­dows is scal­able to larg­er di­am­e­ter coax and to high­er power lev­els.

  1. THE COLUMN DENSITY DISTRIBUTION AND CONTINUUM OPACITY OF THE INTERGALACTIC AND CIRCUMGALACTIC MEDIUM AT REDSHIFT (z) = 2.4

    SciTech Connect (OSTI)

    Rudie, Gwen C.; Steidel, Charles C. [Cahill Center for Astronomy and Astrophysics, California Institute of Technology, MS 249-17, Pasadena, CA 91125 (United States); Shapley, Alice E. [Department of Astronomy, University of California, Los Angeles, 430 Portola Plaza, Los Angeles, CA 90024 (United States); Pettini, Max, E-mail: gwen@astro.caltech.edu [Institute of Astronomy, Madingley Road, Cambridge CB3 0HA (United Kingdom)

    2013-06-01

    We present new high-precision measurements of the opacity of the intergalactic and circumgalactic medium (IGM; CGM) at (z) = 2.4. Using Voigt profile fits to the full Ly{alpha} and Ly{beta} forests in 15 high-resolution high-S/N spectra of hyperluminous QSOs, we make the first statistically robust measurement of the frequency of absorbers with H I column densities 14{approx}< log (N{sub H{sub I}}/cm{sup -2}){approx}<17.2. We also present the first measurements of the frequency distribution of H I absorbers in the volume surrounding high-z galaxies (the CGM, 300 pkpc), finding that the incidence of absorbers in the CGM is much higher than in the IGM. In agreement with Rudie et al., we find that there are fractionally more high-N{sub H{sub I}} absorbers than low-N{sub H{sub I}} absorbers in the CGM compared to the IGM, leading to a shallower power law fit to the CGM frequency distribution. We use these new measurements to calculate the total opacity of the IGM and CGM to hydrogen-ionizing photons, finding significantly higher opacity than most previous studies, especially from absorbers with log (N{sub H{sub I}}/cm{sup -2}) < 17.2. Reproducing the opacity measured in our data as well as the incidence of absorbers with log (N{sub H{sub I}}/cm{sup -2})>17.2 requires a broken power law parameterization of the frequency distribution with a break near N{sub H{sub I}} Almost-Equal-To 10{sup 15} cm{sup -2}. We compute new estimates of the mean free path ({lambda}{sub mfp}) to hydrogen-ionizing photons at z{sub em} = 2.4, finding {lambda}{sub mfp} = 147 {+-} 15 Mpc when considering only IGM opacity. If instead, we consider photons emanating from a high-z star-forming galaxy and account for the local excess opacity due to the surrounding CGM of the galaxy itself, the mean free path is reduced to {lambda}{sub mfp} = 121 {+-} 15 Mpc. These {lambda}{sub mfp} measurements are smaller than recent estimates and should inform future studies of the metagalactic UV background and of ionizing sources at z Almost-Equal-To 2-3.

  2. Ghrelin inhibits the apoptosis of MC3T3-E1 cells through ERK and AKT signaling pathway

    SciTech Connect (OSTI)

    Liang, Qiu-Hua; Liu, Yuan; Wu, Shan-Shan; Cui, Rong-Rong; Yuan, Ling-Qing, E-mail: allenylq@hotmail.com; Liao, Er-Yuan, E-mail: eyliao@21cn.com

    2013-11-01

    Ghrelin is a 28-amino-acid peptide that acts as a natural endogenous ligand of the growth hormone secretagogue receptor (GHSR) and strongly stimulates the release of growth hormone from the hypothalamus–pituitary axis. Previous studies have identified the important physiological effects of ghrelin on bone metabolism, such as regulating proliferation and differentiation of osteoblasts, independent of GH/IGF-1 axis. However, research on effects and mechanisms of ghrelin on osteoblast apoptosis is still rare. In this study, we identified expression of GHSR in MC3T3-E1 cells and determined the effects of ghrelin on the apoptosis of osteoblastic MC3T3-E1 cells and the mechanism involved. Our data demonstrated that ghrelin inhibited the apoptosis of osteoblastic MC3T3-E1 cells induced by serum deprivation, as determined by terminal deoxynucleotidyl transferase-mediated deoxyribonucleotide triphosphate nick end-labeling (TUNEL) and ELISA assays. Moreover, ghrelin upregulated Bcl-2 expression and downregulated Bax expression in a dose-dependent manner. Our study also showed decreased activated caspase-3 activity under the treatment of ghrelin. Further study suggested that ghrelin stimulated the phosphorylation of ERK and AKT. Pretreatment of cells with the ERK inhibitor PD98059, PI3K inhibitor LY294002, and GHSR-siRNA blocked the ghrelin-induced activation of ERK and AKT, respectively; however, ghrelin did not stimulate the phosphorylation of p38 or JNK. PD90859, LY294002 and GHSR-siRNA attenuated the anti-apoptosis effect of ghrelin in MC3T3-E1 cells. In conclusion, ghrelin inhibits the apoptosis of osteoblastic MC3T3-E1 cells induced by serum deprivation, which may be mediated by activating the GHSR/ERK and GHSR/PI3K/AKT signaling pathways. - Highlights: • We explored the effects of ghrelin on serum deprivation-induced MC3T3-E1 cells apoptosis. • Both ELISA and TUNEL were used to detect the apoptosis. • The receptor of ghrelin, GHSR, was expressed in MC3T3-E1 cells. • Both Akt and ERK are critical adaptor molecules to mediate the effects of ghrelin.

  3. THE LOW-REDSHIFT INTERGALACTIC MEDIUM AS SEEN IN ARCHIVAL LEGACY HST/STIS AND FUSE DATA

    SciTech Connect (OSTI)

    Tilton, Evan M.; Danforth, Charles W.; Michael Shull, J. [CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, 389-UCB, Boulder, CO 80309 (United States); Ross, Teresa L., E-mail: evan.tilton@colorado.edu, E-mail: charles.danforth@colorado.edu, E-mail: michael.shull@colorado.edu, E-mail: rosst@nmsu.edu [Department of Astronomy, New Mexico State University, Las Cruces, NM 88003 (United States)

    2012-11-10

    We present a comprehensive catalog of ultraviolet (HST/STIS and FUSE) absorbers in the low-redshift intergalactic medium (IGM) at z < 0.4. The catalog draws from much of the extensive literature on IGM absorption and reconciles discrepancies among several previous catalogs through a critical evaluation of all reported absorption features in light of new HST/COS data. We report on 746 H I absorbers down to a rest-frame equivalent width of 12 mA over a maximum redshift path length {Delta}z = 5.38. We also confirm 111 O VI absorbers, 29 C IV absorbers, and numerous absorption lines due to other metal ions. We characterize the bivariate distribution of absorbers in redshift and column density as a power law, {partial_derivative}{sup 2}N/{partial_derivative}z{partial_derivative}N) {proportional_to} N{sup -{beta}}, where {beta} = 2.08 {+-} 0.12 for O VI and {beta} = 1.68 {+-} 0.03 for H I. Utilizing a more sophisticated accounting technique than past work, our catalog accounts for {approx}43% of the baryons: 24% {+-} 2% in the photoionized Ly{alpha} forest and 19% {+-} 2% in the warm-hot IGM as traced by O VI. We discuss the large systematic effects of various assumed metallicities and ionization states on these calculations, and we implement recent simulation results in our estimates.

  4. Elastic Neutron Scattering at 96 MeV

    SciTech Connect (OSTI)

    Hildebrand, A.; Blomgren, J.; Atac, A.; Bergenwall, B.; Johansson, C.; Klug, J.; Mermod, P.; Nilsson, L.; Pomp, S.; Esterlund, M.; Dangtip, S.; Tippawan, U.; Phansuke, P.; Jonsson, O.; Renberg, P.-U.; Prokofiev, A.; Nadel-Turonski, P.; Elmgren, K.; Olsson, N.; Blideanu, V.

    2005-05-24

    A facility for detection of scattered neutrons in the energy interval 50-130 MeV, SCANDAL (SCAttered Nucleon Detection AssembLy), has recently been installed at the 20 - 180-MeV neutron beam line of The Svedberg Laboratory, Uppsala. Elastic neutron scattering from 12C, 16O, 56Fe, 89Y, and 208Pb has been studied at 96 MeV in the 10-70 deg. interval. The results from 12C and 208Pb have recently been published,6 while the data from 16O, 56Fe, and 89Y are under analysis. The achieved energy resolution, 3.7 MeV, is about an order of magnitude better than for any previous experiment above 65 MeV incident energy. The present experiment represents the highest neutron energy where the ground state has been resolved from the first excited state in neutron scattering. A novel method for normalization of the absolute scale of the cross section has been used. The estimated normalization uncertainty, 3%, is unprecedented for a neutron-induced differential cross section measurement on a nuclear target. The results are compared with modern optical model predictions, based on phenomenology or microscopic theory. Applications for these measurements are nuclear-waste incineration, single-event upsets in electronics, and fast-neutron therapy.

  5. Three Dimensional Structure and Energy Balance of a Coronal Mass Ejection

    E-Print Network [OSTI]

    J. -Y. Lee; J. C. Raymond; Y. -K. Ko; K. -S. Kim

    2008-10-27

    The Ultraviolet Coronagraph Spectrometer (UVCS) observed Doppler shifted material of a partial Halo Coronal Mass Ejection (CME) on December 13 2001. The observed ratio of [O V]/O V] is a reliable density diagnostic important for assessing the state of the plasma. Earlier UVCS observations of CMEs found evidence that the ejected plasma is heated long after the eruption. We have investigated the heating rates, which represent a significant fraction of the CME energy budget. The parameterized heating and radiative and adiabatic cooling have been used to evaluate the temperature evolution of the CME material with a time dependent ionization state model. The functional form of a flux rope model for interplanetary magnetic clouds was also used to parameterize the heating. We find that continuous heating is required to match the UVCS observations. To match the O VI-bright knots, a higher heating rate is required such that the heating energy is greater than the kinetic energy. The temperatures for the knots bright in Ly$\\alpha$ and C III emission indicate that smaller heating rates are required for those regions. In the context of the flux rope model, about 75% of the magnetic energy must go into heat in order to match the O VI observations. We derive tighter constraints on the heating than earlier analyses, and we show that thermal conduction with the Spitzer conductivity is not sufficient to account for the heating at large heights.

  6. Statistical properties of multi-epoch spectral variability of SDSS stripe 82 quasars

    SciTech Connect (OSTI)

    Kokubo, Mitsuru; Morokuma, Tomoki; Minezaki, Takeo; Doi, Mamoru [Institute of Astronomy, School of Science, University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015 (Japan); Kawaguchi, Toshihiro [Department of Physics and Information Science, Yamaguchi University, Yamaguchi, Yamaguchi 753-8512 (Japan); Sameshima, Hiroaki [Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 252-5210 (Japan); Koshida, Shintaro, E-mail: mkokubo@ioa.s.u-tokyo.ac.jp [Center of Astro Engineering and Department of Electrical Engineering, Pontificia Universidad Catolica de Chile, Av. Vicuña Mackenna 4860, Santiago (Chile)

    2014-03-01

    We investigate the UV-optical (longward of Ly? 1216 Å) spectral variability of nearly 9000 quasars (0 < z < 4) using multi-epoch photometric data within the SDSS Stripe 82 region. The regression slope in the flux-flux space of a quasar light curve directly measures the color of the flux difference spectrum, then the spectral shape of the flux difference spectra can be derived by taking a careful look at the redshift dependence of the regression slopes. First, we confirm that the observed quasar spectrum becomes bluer when the quasar becomes brighter. We infer the spectral index of the composite difference spectrum as ?{sub ?}{sup dif}?+1/3 (in the form of f{sub ?}??{sup ?{sub ?}}), which is significantly bluer than that of the composite spectrum ?{sub ?}{sup com}??0.5. We also show that the continuum variability cannot be explained by accretion disk models with varying mass accretion rates. Second, we examine the effects of broad emission line variability on the color-redshift space. The variability of the 'Small Blue Bump' is extensively discussed. We show that the low-ionization lines of Mg II and Fe II are less variable compared to Balmer emission lines and high-ionization lines, and the Balmer continuum is the dominant variable source around ?3000 Å. These results are compared with previous studies, and the physical mechanisms of the variability of the continuum and emission lines are discussed.

  7. Above ground productivity and floristic structure of a high subalpine herbaceous meadow

    E-Print Network [OSTI]

    Armitage, Kenneth

    1979-01-01

    t c h e d a r e a s a re s t ands of tall willow (Salix sp . ) a n d k r u m m h o l z . T h e e p h e m e r a l s t r e a m f lowing nor th t h r o u g h the center of the s tudy a r e a is ou t l ined . Most of snow zone 3 a d j a c e n... m a i n e d until la te Ju ly . e x c e p t t h a t a r e a s o f t a l l w i l l o w (Salix s p . ) a n d k r u m m h o l z ( F i g u r e 1) w e r e n o t e x a m i n e d . T h e f i r s t q u a d r a t s w e r e e s t a b l i s h e d 1 8 J u n e...

  8. New Evidence for Interacting Dark Energy from BOSS

    E-Print Network [OSTI]

    E. Abdalla; Elisa G. M. Ferreira; Jerome Quintin; Bin Wang

    2014-12-19

    In this Letter we show that an interaction between dark matter and dark energy is favored by the most recent large scale structure observations. The result presented by the BOSS-SDSS collaboration measuring the baryon acoustic oscillations of the Ly-$\\alpha$ forest from high redshift quasars indicates a $2.5\\sigma$ departure from the standard $\\Lambda$CDM model. This is the first time that the evolution of dark energy at high redshifts has been measured and the current results cannot be explained by simple generalizations of the cosmological constant. We show here that a simple phenomenological interaction in the dark sector provides a good explanation for this deviation, naturally accommodating the Hubble parameter obtained by BOSS, $H(z=2.34)=222 \\pm 7 ~\\mathrm{km~s^{-1}~Mpc^{-1}}$, for two of the proposed models with a positive coupling constant and rejecting the null interaction at more than $2\\sigma$. For this we used the adjusted values of the cosmological parameters for the interacting models from the current observational data sets. This small and positive value of the coupling constant also helps alleviate the coincidence problem.

  9. The discovery of a galaxy-wide superwind from a young massive galaxy at redshift z~3

    E-Print Network [OSTI]

    R. J. Wilman; J. Gerssen; R. G. Bower; S. L. Morris; R. Bacon; P. T. de Zeeuw; R. L. Davies

    2005-07-13

    High-velocity galactic outflows, driven by intense bursts of star formation and black hole accretion, are invoked by current theories of galaxy formation to terminate star formation in the most massive galaxies and to deposit heavy elements in the intergalactic medium. From existing observational evidence on high-redshift galaxies, it is unclear whether such outflows are localized to regions of intense star formation just a few kiloparsecs in extent, or whether they instead have a significant impact on the entire galaxy and its surroundings. Here we present two-dimensional spectroscopy of a star-forming galaxy at redshift z=3.09 (seen 11.5 Gyr ago, when the Universe was 20 per cent of its current age): its spatially extended Ly-alpha emission appears to be absorbed by HI in a foreground screen covering the entire galaxy, with a lateral extent of at least 100 kpc and remarkable velocity coherence. It was plausibly ejected from the galaxy during a starburst several 1E8 yr earlier and has subsequently swept up gas from the surrounding intergalactic medium and cooled. This demonstrates the galaxy-wide impact of high-redshift superwinds.

  10. An Extreme High-Velocity Bipolar Outflow in the Pre-Planetary Nebula IRAS 08005-2356

    E-Print Network [OSTI]

    Sahai, R

    2015-01-01

    We report interferometric mapping of the bipolar pre-planetary nebula IRAS 08005-2356 with an angular-resolution of ~1"-5", using the Submillimeter Array (SMA), in the 12CO J=2-1, 3-2, 13CO J=2-1 and SiO J=5-4 (v=0) lines. Single-dish observations, using the SMT 10-m, were made in these lines as well as in the CO J=4-3 and SiO J-6-5 (v=0) lines. The lines profiles are very broad, showing the presence of a massive (>0.1 Msun), extreme high-velocity outflow (V~200 km/s) directed along the nebular symmetry axis derived from the HST imaging of this object. The outflow's scalar momentum far exceeds that available from radiation pressure of the central post-AGB star, and it may be launched from an accretion disk around a main-sequence companion. We provide indirect evidence for such a disk from its previously published, broad H-alpha emission profile, which we propose results from Ly-beta emission generated in the disk followed by Raman-scattering in the innermost regions of a fast, neutral wind.

  11. H-beta Line Width and the UV-X-ray Spectra of Luminous AGN

    E-Print Network [OSTI]

    B. J. Wills; Z. Shang; J. M. Yuan

    2000-05-08

    The width of the broad H-beta emission line is the primary defining characteristic of the NLS1 class. This parameter is also an important component of Boroson and Green's optical Eigenvector 1 (EV1), which links steeper soft X-ray spectra with narrower H-beta emission, stronger H-beta blue wing, stronger optical Fe II emission, and weaker [O III] lambda 5007. Potentially, EV1 represents a fundamental physical process linking the dynamics of fueling and outflow with the accretion rate. We attempted to understand these relationships by extending the optical spectra into the UV for a sample of 22 QSOs with high quality soft-X-ray spectra, and discovered a whole new set of UV relationships that suggest that high accretion rates are linked to dense gas and perhaps nuclear starbursts. While it has been argued that narrow (BLR) H-beta means low Black Hole mass in luminous NLS1s, the C IV, lambda 1549 and Ly alpha emission lines are broader, perhaps the result of outflows driven by their high Eddington accretion rates. We present some new trends of optical-UV with X-ray spectral energy distributions. Steeper X-ray spectra appear associated with stronger UV relative to optical continua, but the presence of strong UV absorption lines is associated with depressed soft X-rays and redder optical-UV continua.

  12. MULTI-FLUID MODEL OF A STREAMER AT SOLAR MINIMUM AND COMPARISON WITH OBSERVATIONS

    SciTech Connect (OSTI)

    Ofman, Leon [Department of Physics, Catholic University of America, and NASA Goddard Space Flight Center, Code 671, Greenbelt, MD 20771 (United States); Abbo, Lucia; Giordano, Silvio, E-mail: Leon.Ofman@nasa.gov [INAF Astronomical Observatory of Turin (Italy)

    2011-06-10

    We present the results of a time-dependent 2.5-dimensional three-fluid magnetohydrodynamic model of the coronal streamer belt, which is compared with the slow solar wind plasma parameters obtained in the extended corona by the UV spectroscopic data from the Ultraviolet Coronagraph Spectrometer (UVCS) on board SOHO during the past minimum of solar activity (Carrington Rotation 1913). Our previous three-fluid streamer model has been improved by considering the solar magnetic field configuration relevant for solar minimum conditions, and preferential heating for O{sup 5+} ions. The model was run until a fully self-consistent streamer solution was obtained in the quasi-steady state. The plasma parameters from the multi-fluid model were used to compute the expected UV observables from H I Ly{alpha} 1216 A and O VI 1032 A spectral lines, and the results were compared in detail with the UVCS measurements. A good agreement between the model and the data was found. The results of the study provide insight into the acceleration and heating of the multi-ion slow solar wind.

  13. Quasar-Lyman ? forest cross-correlation from BOSS DR11: Baryon Acoustic Oscillations

    SciTech Connect (OSTI)

    Font-Ribera, Andreu; Kirkby, David; Blomqvist, Michael; Busca, Nicolas; Aubourg, Éric; Bautista, Julian; Ross, Nicholas P.; Bailey, Stephen; Beutler, Florian; Carithers, Bill; Slosar, Anže; Rich, James; Delubac, Timothée; Bhardwaj, Vaishali; Bizyaev, Dmitry; Brewington, Howard; Brinkmann, Jon; Brownstein, Joel R.; Dawson, Kyle S.; and others

    2014-05-01

    We measure the large-scale cross-correlation of quasars with the Ly? forest absorption, using over 164,000 quasars from Data Release 11 of the SDSS-III Baryon Oscillation Spectroscopic Survey. We extend the previous study of roughly 60,000 quasars from Data Release 9 to larger separations, allowing a measurement of the Baryonic Acoustic Oscillation (BAO) scale along the line of sight c/(H(z = 2.36)r{sub s}) = 9.0±0.3 and across the line of sight D{sub A}(z = 2.36)/r{sub s} = 10.8±0.4, consistent with CMB and other BAO data. Using the best fit value of the sound horizon from Planck data (r{sub s} = 147.49 Mpc), we can translate these results to a measurement of the Hubble parameter of H(z = 2.36) = 226±8 km s{sup ?1} Mpc{sup ?1} and of the angular diameter distance of D{sub A}(z = 2.36) = 1590±60 Mpc. The measured cross-correlation function and an update of the code to fit the BAO scale (baofit) are made publicly available.

  14. A CO-rich merger shaping a powerful and hyper-luminous infrared radio galaxy at z=2: the Dragonfly Galaxy

    E-Print Network [OSTI]

    Emonts, B H C; Stroe, A; Pentericci, L; Villar-Martin, M; Norris, R P; Miley, G; De Breuck, C; van Moorsel, G A; Lehnert, M D; Carilli, C L; Rottgering, H J A; Seymour, N; Sadler, E M; Ekers, R D; Drouart, G; Feain, I; Colina, L; Stevens, J; Holt, J

    2015-01-01

    In the low-redshift Universe, the most powerful radio sources are often associated with gas-rich galaxy mergers or interactions. We here present evidence for an advanced, gas-rich (`wet') merger associated with a powerful radio galaxy at a redshift of z~2. This radio galaxy, MRC 0152-209, is the most infrared-luminous high-redshift radio galaxy known in the southern hemisphere. Using the Australia Telescope Compact Array, we obtained high-resolution CO(1-0) data of cold molecular gas, which we complement with HST/WFPC2 imaging and WHT long-slit spectroscopy. We find that, while roughly M(H2) ~ 2 x 10$^{10}$ M$_{\\odot}$ of molecular gas coincides with the central host galaxy, another M(H2) ~ 3 x 10$^{10}$ M$_{\\odot}$ is spread across a total extent of ~60 kpc. Most of this widespread CO(1-0) appears to follow prominent tidal features visible in the rest-frame near-UV HST/WFPC2 imaging. Ly$\\alpha$ emission shows an excess over HeII, but a deficiency over L(IR), which is likely the result of photo-ionisation by ...

  15. Performance of standard rate trickling filters at various depths 

    E-Print Network [OSTI]

    Peralta-Rojas, Andres

    1955-01-01

    , 3-%gy . ")4y XC V444t"-l4 SBS~. "M Sf'&4' ', A O'P& WCU:44 Ch 5 5~iy*. . X'~:g ggLtex 5 fee4 ~4 "Xg, ~oq Xjt VvMt; e e. where~ eolbm;mW&mar se ~: a tv'e1". X". , ". ~~, 14ex' 4 6seh ~ 'iQy 50ly $ VOBIS 10 448 4'~~ N&1'. & W"&M5lTA'MLS e '. wkly... (. 'opsy X5 '~, eel QIF cl P he %pe eh4ile on )o 'o y '"8 M'sl K. x hp @i~i ":=, . 'Llhea 5 1'eeL cbsey? Ply' . ioy l "s, el%';i5A Mtween IFQl@hlle e98p@Ac144 IQXL~ ~~1 ani '8+ae, ~a, xe-e?1 b~g. h?'. o;ll~w, i lkheve $ I't+~ 4 . C~~ ~3 5 x"t4, doe...

  16. A dual-channel, curved-crystal spectrograph for petawatt laser, x-ray backlighter source studies

    SciTech Connect (OSTI)

    Theobald, W.; Stoeckl, C.; Jaanimagi, P. A.; Nilson, P. M.; Storm, M.; Meyerhofer, D. D.; Sangster, T. C.; Hey, D.; MacKinnon, A. J.; Park, H.-S.; Patel, P. K.; Shepherd, R.; Snavely, R. A.; Key, M. H.; King, J. A.; Zhang, B.; Stephens, R. B.; Akli, K. U.; Highbarger, K.; Daskalova, R. L.; and others

    2009-08-15

    A dual-channel, curved-crystal spectrograph was designed to measure time-integrated x-ray spectra in the {approx}1.5 to 2 keV range (6.2-8.2 A wavelength) from small-mass, thin-foil targets irradiated by the VULCAN petawatt laser focused up to 4x10{sup 20} W/cm{sup 2}. The spectrograph consists of two cylindrically curved potassium-acid-phthalate crystals bent in the meridional plane to increase the spectral range by a factor of {approx}10 compared to a flat crystal. The device acquires single-shot x-ray spectra with good signal-to-background ratios in the hard x-ray background environment of petawatt laser-plasma interactions. The peak spectral energies of the aluminum He{sub {alpha}} and Ly{sub {alpha}} resonance lines were {approx}1.8 and {approx}1.0 mJ/eV sr ({approx}0.4 and 0.25 J/A sr), respectively, for 220 J, 10 ps laser irradiation.

  17. Constraining the reionization history with QSO absorption spectra

    E-Print Network [OSTI]

    S. Gallerani; T. Roy Choudhury; A. Ferrara

    2006-05-15

    We use a semi-analytical approach to simulate absorption spectra of QSOs at high redshifts with the aim of constraining the cosmic reionization history. We consider two physically motivated and detailed reionization histories: (i) an Early Reionization Model (ERM) in which the intergalactic medium is reionized by PopIII stars at $z\\approx 14$, and (ii) a more standard Late Reionization Model (LRM) in which overlapping, induced by QSOs and normal galaxies, occurs at $z\\approx 6$. From the analysis of current Ly$\\alpha$ forest data at $z 6$, however, clear differences start to emerge which are best quantified by the dark gap and peak width distributions. We find that 35 (zero) per cent of the lines of sight within $5.750$ Angstrom in the rest frame of the QSO if reionization is not (is) complete at $z \\gtrsim 6$. Similarly, the ERM predicts peaks of width $\\sim 1$ Angstrom in 40 per cent of the lines of sight in the redshift range $6.0-6.6$; in the same range, LRM predicts no peaks of width $>0.8$ Angstrom. We conclude that the dark gap and peak width statistics represent superb probes of cosmic reionization if about ten QSOs can be found at $z > 6$. We finally discuss strengths and limitations of our method.

  18. THE GEOMETRY EFFECTS OF AN EXPANDING UNIVERSE ON THE DETECTION OF COOL NEUTRAL GAS AT HIGH REDSHIFT

    SciTech Connect (OSTI)

    Curran, S. J.

    2012-03-20

    Recent high-redshift surveys for 21 cm absorption in damped Ly{alpha} absorption systems (DLAs) take the number of published searches at z{sub abs} > 2 to 25, the same number as at z{sub abs} < 2, although the detection rate at high redshift remains significantly lower (20% compared to 60%). Using the known properties of the DLAs to estimate the unknown profile widths of the 21 cm non-detections and including the limits via a survival analysis, we show that the mean spin temperature/covering factor degeneracy at high redshift is, on average, double that of the low-redshift sample. This value is significantly lower than the previous factor of eight for the spin temperatures and is about the same factor as in the angular diameter distance ratios between the low- and high-redshift samples. That is, without the need for the several pivotal assumptions, which lead to an evolution in the spin temperature, we show that the observed distribution of 21 cm detections in DLAs can be accounted for by the geometry effects of an expanding universe. That is, as yet there is no evidence of the spin temperature of gas-rich galaxies evolving with redshift.

  19. A FOURTH H I 21 cm ABSORPTION SYSTEM IN THE SIGHT LINE OF MG J0414+0534: A RECORD FOR INTERVENING ABSORBERS

    SciTech Connect (OSTI)

    Tanna, A.; Webb, J. K.; Curran, S. J.; Whiting, M. T.; Bignell, C.

    2013-08-01

    We report the detection of a strong H I 21 cm absorption system at z = 0.5344, as well as a candidate system at z = 0.3389, in the sight line toward the z = 2.64 quasar MG J0414+0534. This, in addition to the absorption at the host redshift and the other two intervening absorbers, takes the total to four (possibly five). The previous maximum number of 21 cm absorbers detected along a single sight line is two and so we suspect that this number of gas-rich absorbers is in some way related to the very red color of the background source. Despite this, no molecular gas (through OH absorption) has yet been detected at any of the 21 cm redshifts, although, from the population of 21 cm absorbers as a whole, there is evidence for a weak correlation between the atomic line strength and the optical-near-infrared color. In either case, the fact that so many gas-rich galaxies (likely to be damped Ly{alpha} absorption systems) have been found along a single sight line toward a highly obscured source may have far-reaching implications for the population of faint galaxies not detected in optical surveys, a possibility which could be addressed through future wide-field absorption line surveys with the Square Kilometer Array.

  20. HST/COS OBSERVATIONS OF THIRTEEN NEW He II QUASARS

    SciTech Connect (OSTI)

    Syphers, David; Anderson, Scott F.; Zheng Wei; Meiksin, Avery; Schneider, Donald P.; York, Donald G.

    2012-04-15

    The full reionization of intergalactic helium was a major event in the history of the intergalactic medium (IGM), and UV observations of the He II Gunn-Peterson trough allow us to characterize the end of this process at z {approx} 3. Due to intervening hydrogen absorption, quasars allowing such study are rare, with only 33 known in the literature, and most of those are very recent discoveries. We expand on our previous discovery work, and present 13 new He II quasars with redshifts 2.82 < z < 3.77, here selected with {approx}80% efficiency, and including several that are much brighter than the vast majority of those previously known. This is the largest sample of uniformly observed He II quasars covering such a broad redshift range, and they show evidence of IGM opacity increasing with redshift, as expected for the helium reionization epoch. No evidence of He II Ly{alpha} quasar emission is seen in individual or averaged spectra, posing a problem for standard models of the broad-line region. The current rapid advance in the study of He II quasars has been greatly facilitated by the Cosmic Origins Spectrograph on the Hubble Space Telescope, and we discuss the instrumental and other subtleties that must be taken into account in IGM He II observations.

  1. On the origin of soft X-rays in obscured AGN: answers from high-resolution spectroscopy with XMM-Newton

    E-Print Network [OSTI]

    Matteo Guainazzi; Stefano Bianchi

    2006-10-24

    We present results of a high-resolution soft X-ray (0.2-2 keV) spectroscopic study of a sample of 69 nearby obscured Active Galactic Nuclei (AGN) observed with the Reflection Grating Spectrometer (RGS) on board XMM-Newton. This is the largest sample ever studied with this technique so far. The main conclusions of our study can be summarized as follows: a) narrow Radiative Recombination Continua are detected in about 36% of the objects in our sample (in 26% their intrinsic width is <10 eV); b) higher order transitions are generally enhanced with respect to pure photoionization, indicating that resonant scattering plays an important role in the ionization/excitation balance. These results support the scenario, whereby the active nucleus is responsible for the X-ray ``soft excess'' almost ubiquitously observed in nearby obscured AGN via photoionization of circumnuclear gas. They confirm on a statistical basis the conclusions drawn from the detailed study of the brightest spectra in the sample. Furthermore, we propose a criterion to statistically discriminate between AGN-photoionized sources and starburst galaxies, based on intensity of the forbidden component of the OVII He-alpha triplet (once normalized to the OVIII Ly-alpha) coupled with the integrated luminosity in He-like and H-like oxygen lines.

  2. The X-ray emission of the gamma Cassiopiae stars

    E-Print Network [OSTI]

    Smith, Myron A; Motch, C

    2015-01-01

    Long considered as the "odd man out" among X-ray emitting Be stars, \\gamma Cas (B0.5e\\,IV) is now recognized as the prototype of a class of stars that emit hard thermal X-rays. Our classification differs from the historical use of the term "gamma Cas stars" defined from optical properties alone. The luminosity output of this class contributes significantly to the hard X-ray production of massive stars in the Galaxy. The gamma Cas stars have light curves showing variability on a few broadly-defined timescales and spectra indicative of an optically thin plasma consisting of one or more hot thermal components. By now 9--13 Galactic \\approx B0-1.5e main sequence stars are judged to be members or candidate members of the \\gc\\ class. Conservative criteria for this designation are for a \\approxB0-1.5e III-V star to have an X-ray luminosity of 10^{32}--10^{33} ergs s^{-1}, a hot thermal spectrum containing the short wavelength Ly \\alpha FeXXV and FeXXVI lines and the fluorescence FeK feature all in emission. If therm...

  3. The True origin of Wolf-Rayet stars

    E-Print Network [OSTI]

    Vink, Jorick S

    2015-01-01

    The Wolf-Rayet (WR) phenomenon is widespread in astronomy. It involves classical WRs, very massive stars (VMS), WR central stars of planetary nebula CSPN [WRs], and supernovae (SNe). But what is the root cause for a certain type of object to turn into an emission-line star? In this contribution, I discuss the basic aspects of radiation-driven winds that might reveal the ultimate difference between WR stars and canonical O-type stars. I discuss the aspects of (i) self-enrichment via CNO elements, (ii) high effective temperatures Teff, (iii) an increase in the helium abundance Y, and finally (iv) the Eddington factor Gamma. Over the last couple of years, we have made a breakthrough in our understanding of Gamma-dependent mass loss, which will have far-reaching consequences for the evolution and fate of the most massive stars in the Universe. Finally, I discuss the prospects for studies of the WR phenomenon in the highest redshift Ly-alpha and He II emitting galaxies.

  4. THE EXTRAGALACTIC BACKGROUND LIGHT FROM THE MEASUREMENTS OF THE ATTENUATION OF HIGH-ENERGY GAMMA-RAY SPECTRUM

    SciTech Connect (OSTI)

    Gong Yan; Cooray, Asantha [Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States)

    2013-07-20

    The attenuation of high-energy gamma-ray spectrum due to the electron-positron pair production against the extragalactic background light (EBL) provides an indirect method to measure the EBL of the universe. We use the measurements of the absorption features of the gamma-rays from blazars as seen by the Fermi Gamma-ray Space Telescope to explore the EBL flux density and constrain the EBL spectrum, star formation rate density (SFRD), and photon escape fraction from galaxies out to z = 6. Our results are basically consistent with the existing determinations of the quantities. We find a larger photon escape fraction at high redshifts, especially at z = 3, compared to the result from recent Ly{alpha} measurements. Our SFRD result is consistent with the data from both gamma-ray burst and ultraviolet (UV) observations in the 1{sigma} level. However, the average SFRD we obtain at z {approx}> 3 matches the gamma-ray data better than the UV data. Thus our SFRD result at z {approx}> 6 favors the fact that star formation alone is sufficiently high enough to reionize the universe.

  5. 21 cm signal from cosmic dawn: Imprints of spin temperature fluctuations and peculiar velocities

    E-Print Network [OSTI]

    Ghara, Raghunath; Datta, Kanan K

    2014-01-01

    Observations of fluctuations in the 21 cm brightness temperature $\\delta T_b$ from reionization promise to provide information on the physical processes during that epoch. We present a formalism for generating the distribution of $\\delta T_b$ using dark matter $N$-body simulations and an one-dimensional radiative transfer code. The spectral energy distribution of the radiation sources is assumed to consist of a stellar-like and a mini-quasar like component. Our analysis is able to take into account the fluctuations in the spin temperature $T_S$ of neutral hydrogen arising from inhomogeneous X-ray heating and Ly$\\alpha$ coupling during cosmic dawn. We find that the power spectrum at large scales ($k \\sim 0.1$ Mpc$^{-1}$), when plotted as a function of redshift, shows three peaks. The middle peak has the largest amplitude and occurs when $\\sim 10\\%$ of the gas (by volume) is heated above the CMB temperature, irrespective of the X-ray source properties. The power spectrum when plotted against $k$ shows a "bump"-...

  6. The metallicity and dust content of a redshift 5 gamma-ray burst host galaxy

    SciTech Connect (OSTI)

    Sparre, M.; Krühler, T.; Fynbo, J. P. U.; Watson, D. J.; De Ugarte Postigo, A.; Hjorth, J.; Malesani, D. [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen (Denmark); Hartoog, O. E.; Kaper, L. [Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (Netherlands); Wiersema, K. [Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH (United Kingdom); D'Elia, V. [INAF/Rome Astronomical Observatory, via Frascati 33, I-00040 Monteporzio Catone (Roma) (Italy); Zafar, T. [European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching (Germany); Afonso, P. M. J. [Physics and Astronomy Department, American River College, 4700 College Oak Drive, Sacramento, CA 95841 (United States); Covino, S. [INAF, Osservatorio Astronomico di Brera, via E. Bianchi 46, I-23807 Merate (Italy); Flores, H. [Laboratoire GEPI, Observatoire de Paris, CNRS-UMR8111, Universite Paris Diderot 5 place Jules Janssen, F-92195 Meudon (France); Goldoni, P. [APC, Astroparticule et Cosmologie, Universite Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10, Rue Alice Domon et Léonie Duquet, F-75205 Paris, Cedex 13 (France); Greiner, J. [Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, D-85748 Garching (Germany); Jakobsson, P. [Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhagi 5, IS-107 Reykjavik (Iceland); Klose, S. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg (Germany); Levan, A. J., E-mail: sparre@dark-cosmology.dk [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); and others

    2014-04-20

    Observations of the afterglows of long gamma-ray bursts (GRBs) allow the study of star-forming galaxies across most of cosmic history. Here we present observations of GRB 111008A, from which we can measure metallicity, chemical abundance patterns, dust-to-metals ratio (DTM), and extinction of the GRB host galaxy at z = 5.0. The host absorption system is a damped Ly? absorber with a very large neutral hydrogen column density of log?N(H I)/cm{sup ?2}=22.30±0.06 and a metallicity of [S/H] = –1.70 ± 0.10. It is the highest-redshift GRB with such a precise metallicity measurement. The presence of fine-structure lines confirms the z = 5.0 system as the GRB host galaxy and makes this the highest redshift where Fe II fine-structure lines have been detected. The afterglow is mildly reddened with A{sub V} = 0.11 ± 0.04 mag, and the host galaxy has a DTM that is consistent with being equal to or lower than typical values in the Local Group.

  7. Metallicity and Physical Conditions in the Magellanic Bridge

    E-Print Network [OSTI]

    N. Lehner; J. C. Howk; F. P. Keenan; J. V. Smoker

    2008-01-16

    We present a new analysis of the diffuse gas in the Magellanic Bridge (RA>3h) based on HST/STIS E140M and FUSE spectra of 2 early-type stars lying within the Bridge and a QSO behind it. We derive the column densities of HI (from Ly\\alpha), NI, OI, ArI, SiII, SII, and FeII of the gas in the Bridge. Using the atomic species, we determine the first gas-phase metallicity of the Magellanic Bridge, [Z/H]=-1.02+/-0.07 toward one sightline, and -1.7Bridge gas along our three lines of sight is ~70-90% ionized, despite high HI columns, logN(HI)=19.6-20.1. Possible sources for the ongoing ionization are certainly the hot stars within the Bridge, hot gas (revealed by OVI absorption), and leaking photons from the SMC and LMC. From the analysis of CII*, we deduce that the overall density of the Bridge must be low (<0.03-0.1 cm^-3). We argue that our findings combined with other recent observational results should motivate new models of the evolution of the SMC-LMC-Galaxy system.

  8. The consistency test on the cosmic evolution

    E-Print Network [OSTI]

    Gong, Yan; Zhang, Shuang-Nan; Chen, Xuelei

    2015-01-01

    We propose a new and robust method to test the consistency of the cosmic evolution given by a cosmological model. It is realized by comparing the combined quantity r_d^CMB/D_V^SN, which is derived from the comoving sound horizon r_d from cosmic microwave background (CMB) measurements and the effective distance D_V derived from low-redshift Type-Ia supernovae (SNe Ia) data, with direct and independent r_d/D_V obtained by baryon acoustic oscillation (BAO) measurements at median redshifts. We apply this test method for the LCDM and wCDM models, and investigate the consistency of the derived value of r_d/D_V from Planck 2015 and the SN Ia data sets of Union2.1 and JLA (z<1.5), and the r_d/D_V directly given by BAO data from six-degree-field galaxy survey (6dFGS), Sloan Digital Sky Survey Data Release 7 Main Galaxy Survey (SDSS-DR7 MGS), DR11 of SDSS-III, WiggleZ and Ly-alpha forecast surveys from Baryon Oscillation Spectroscopic Data (BOSS) DR-11 over 0.1

  9. Evidence for Thermal X-Ray Line Emission from the Synchrotron-Dominated Supernova Remnant RX J1713.7-3946

    E-Print Network [OSTI]

    Katsuda, Satoru; Tominaga, Nozomu; Fukui, Yasuo; Hiraga, Junko S; Koyama, Katsuji; Lee, Shiu-Hang; Mori, Koji; Nagataki, Shigehiro; Ohira, Yutaka; Petre, Robert; Sano, Hidetoshi; Takeuchi, Yoko; Tamagawa, Toru; Tsuji, Naomi; Tsunemi, Hiroshi; Uchiyama, Yasunobu

    2015-01-01

    We report the first detection of thermal X-ray line emission from the supernova remnant (SNR) RX J1713.7-3946, the prototype of the small class of synchrotron dominated SNRs. A softness-ratio map generated using XMM-Newton data shows that faint interior regions are softer than bright shell regions. Using Suzaku and deep XMM-Newton observations, we have extracted X-ray spectra from the softest area, finding clear line features at 1 keV and 1.35 keV. These lines can be best explained as Ne Ly-alpha and Mg He-alpha from a thermal emission component. Since the abundance ratios of metals to Fe are much higher than solar values in the thermal component, we attribute the thermal emission to reverse-shocked SN ejecta. The measured Mg/Ne, Si/Ne, and Fe/Ne ratios of 2.0-2.6, 1.5-2.0, and winds of the progenitor star on the surrounding medi...

  10. He II Proximity Effect and the Lifetime of Quasars

    E-Print Network [OSTI]

    Khrykin, I S; McQuinn, M; Worseck, G

    2015-01-01

    The lifetime of quasars is fundamental for understanding the growth of supermassive black holes, and is an important ingredient in models of the reionization of the intergalactic medium. However, despite various attempts to determine quasar lifetimes, current estimates from a variety of methods are uncertain by orders of magnitude. This work combines cosmological hydrodynamical simulations and 1D radiative transfer to investigate the structure and evolution of the He II Ly$\\alpha$ proximity zones around quasars at $z \\simeq 3-4$. We show that the time evolution in the proximity zone can be described by a simple analytical model for the approach of the He II fraction $x_{\\rm HeII}\\left( t \\right)$ to ionization equilibrium, and use this picture to illustrate how the transmission profile depends on the quasar lifetime, quasar UV luminosity, and the ionization state of helium in the ambient IGM (i.e. the average He II fraction, or equivalently the metagalactic He II ionizing background). A significant degeneracy...

  11. The Eighth Data Release of the Sloan Digital Sky Survey: First Data from SDSS-III

    SciTech Connect (OSTI)

    Aihara, Hiroaki; Prieto, Carlos Allende; An, Deokkeun; Anderson, Scott F.; Aubourg, Eric; Balbinot, Eduardo; Beers, Timothy C.; Berlind, Andreas A.; Bickerton, Steven J.; Bizyaev, Dmitry; Blanton, Michael R.; /New York U., CCPP /Penn State U.

    2011-01-01

    The Sloan Digital Sky Survey (SDSS) started a new phase in August 2008, with new instrumentation and new surveys focused on Galactic structure and chemical evolution, measurements of the baryon oscillation feature in the clustering of galaxies and the quasar Ly{alpha} forest, and a radial velocity search for planets around {approx}8000 stars. This paper describes the first data release of SDSS-III (and the eighth counting from the beginning of the SDSS). The release includes 5-band imaging of roughly 5200 deg{sup 2} in the Southern Galactic Cap, bringing the total footprint of the SDSS imaging to 14,555 deg{sup 2}, or over a third of the Celestial Sphere. All the imaging data have been reprocessed with an improved sky-subtraction algorithm and a final, self-consistent recalibration and flat-field determination. This release also includes all data from the second phase of the Sloan Extension for Galactic Understanding and Evolution (SEGUE-2), consisting of spectroscopy of approximately 118,000 stars at both high and low Galactic latitudes. All the more than half a million stellar spectra obtained with the SDSS spectrograph have been reprocessed through an improved stellar parameters pipeline, which has better determination of metallicity for high metallicity stars.

  12. MiX: A Position Sensitive Dual-Phase Liquid Xenon Detector

    E-Print Network [OSTI]

    Stephenson, S; Lin, Q; Ni, K; Pushkin, K; Raymond, R; Schubnell, M; Shutty, N; Tarlé, G; Weaverdyck, C; Lorenzon, W

    2015-01-01

    The need for precise characterization of dual-phase xenon detectors has grown as the technology has matured into a state of high efficacy for rare event searches. The Michigan Xenon detector was constructed to study the microphysics of particle interactions in liquid xenon across a large energy range in an effort to probe aspects of radiation detection in liquid xenon. We report the design and performance of a small 3D position sensitive dual-phase liquid xenon time projection chamber with high light yield ($L_y^{122}=15.2 $pe/keV at zero field), long electron lifetime ($\\tau > 200 \\mu$s), and excellent energy resolution ($\\sigma/E = 1\\%$ for 1,333 keV gamma rays in a drift field of 200 V/cm). Liquid xenon time projection chambers with such high energy resolution may find applications not only in dark matter direct detection searches, but also in neutrinoless double beta decay experiments and other applications.

  13. 21-cm signal from cosmic dawn - II: Imprints of the light-cone effects

    E-Print Network [OSTI]

    Ghara, Raghunath; Choudhury, T Roy

    2015-01-01

    Details of various unknown physical processes during the cosmic dawn and the epoch of reionization can be extracted from observations of the redshifted 21-cm signal. These observations, however, will be affected by the evolution of the signal along the line-of-sight which is known as the "light-cone effect". We model this effect by post-processing a dark matter $N-$body simulation with a 1-D radiative transfer code. We find that the effect is much stronger and dramatic in presence of inhomogeneous heating and Ly$\\alpha$ coupling compared to the case where these processes are not accounted for. One finds increase (decrease) in the coeval spherically averaged power spectrum up to a factor of 3 (0.6) at large scales ($k \\sim 0.05\\, \\rm Mpc^{-1}$), though these numbers are highly dependent on the source model. Consequently, the peak and trough-like features seen in the evolution of the large-scale power spectrum can be smoothed out to a large extent if the width of the frequency bands used in the experiment is la...

  14. PIK3CA is implicated as an oncogene in ovarian cancer

    SciTech Connect (OSTI)

    Shayesteh, Laleh; Lu, Yiling; Kuo, Wen-Lin; Baldocchi, Russell; Godfrey, Tony; Collins, Colin; Pinkel, Daniel; Powell, Bethan; Mills,Gordon B.; Gray, Joe W.

    1998-03-25

    Ovarian cancer is the leading cause of death from gynecological malignancy and the fourth leading cause of cancer death among American women, yet little is known about its molecular aetiology. Studies using comparative genomic hybridization (CGH) have revealed several regions of recurrent, abnormal, DNA sequence copy number that may encode genes involved in the genesis or progression of the disease. One region at 3q26 found to be increased in copy number in approximately 40 percent of ovarian and other cancers contains PIK3CA, which encodes the p110 a catalytic subunit of phosphatidylinositol 3-kinase(PI3-kinase). The association between PIK3CA copy number and PI3-kinase activity makes PIK3CA a candidate oncogene because a broad range of cancer-related functions have been associated with PI3-kinase mediated signaling. These include proliferation, glucose transport and catabolism, cell adhesion, apoptosis, RAS signaling and oncogenic transformation. In addition, downstream effectors of PI3-kinase,AKT1 and AKT2, have been found to be amplified or activated in human tumors, including ovarian cancer. We show here that PIK3CA is frequently increased in copy number in ovarian cancers, that the increased copy number is associated with increased PIK3CA transcription, p110 a protein expression and PI3-kinase activity and that treatment with the PI3-kinase inhibitor LY294002 decreases proliferation and increases apoptosis. Our observations suggest PIK3CA is an oncogene that has an important role in ovarian cancer.

  15. Accretion of dust grains as a possible origin of metal-poor stars with low alpha/Fe ratios

    E-Print Network [OSTI]

    Shigeyama, T; Shigeyama, Toshikazu; Tsujimoto, Takuji

    2003-01-01

    The origin of low alpha/Fe ratios in some metal-poor stars, so called low-alpha stars, is discussed. It is found that most of low-alpha stars in the Galaxy are on the main-sequence. This strongly suggests that these stars suffered from external pollution. It is also found that the abundance ratios Zn/Fe of low-alpha stars both in the Galaxy and in dwarf spheroidal galaxies are lower than the average value of Galactic halo stars whereas damped Ly alpha absorbers have higher ratios. This implies that some low-alpha stars accreted matter depleted from gas onto dust grains. To explain the features in these low-alpha stars, we have proposed that metal-poor stars harboring planetary systems are the origin of these low-alpha stars. Stars engulfing a small fraction of planetesimals enhance the surface content of Fe to exhibit low alpha/Fe ratios on their surfaces while they are on the main-sequence, because dwarfs have shallow surface convection zones where the engulfed matter is mixed. After the stars leave the main...

  16. Luminosity Density Evolution in the Universe and Cosmological Parameters

    E-Print Network [OSTI]

    Tomonori Totani

    1997-10-28

    Star formation history in galaxies is strongly correlated to their present-day colors and the Hubble sequence can be considered as a sequence of different star formation history. Therefore we can model the cosmic star formation history based on the colors of local galaxies, and comparison to direct observations of luminosity density evolution at high redshift gives a new test for the cosmological parameters which is insensitive to merger history of galaxies. The luminosity density evolution in $0$ 0.53 at 95%CL) is strongly favored. The cosmic star formation rate (SFR) at $z>2$ is also compared to the latest data of the Hubble Deep Field including new data which were not incorporated in the previous work of Totani, Yoshii, & Sato (1997), and our model of the luminosity density of spiral galaxies taking account of gas infall is consistent with the observations. Starbursts in elliptical galaxies, which are expected from the galactic wind model, however overproduce SFRs and hence they should be formed at $z \\gtilde 5$ or their UV emission has to be hidden by dust extinction. The amound of metals in galactic winds and escaping ionizing photons are enough to contaminate the Ly$\\alpha$ forests or to reionize the universe.

  17. Simulating the Sunyaev-Zel'dovich effect(s): including radiative cooling and energy injection by galactic winds

    E-Print Network [OSTI]

    Martin White; Lars Hernquist; Volker Springel

    2002-07-08

    We present results on the thermal and kinetic Sunyaev-Zel'dovich (SZ) effects from a sequence of high resolution hydrodynamic simulations of structure formation, including cooling, feedback and metal injection. These simulations represent a self-consistent thermal model which incorporates ideas from the `pre-heating' scenario while preserving good agreement with the low density IGM at z~3 probed by the Ly-a forest. Four simulations were performed, at two different resolutions with and without radiative effects and star formation. The long-wavelength modes in each simulation were the same, so that we can compare the results on an object by object basis. We demonstrate that our simulations are converged to the sub-arcminute level. The effect of the additional physics is to suppress the mean Comptonization parameter by 20% and to suppress the angular power spectrum of fluctuations by just under a factor of two in this model while leaving the source counts and properties relatively unchanged. We quantify how non-Gaussianity in the SZ maps increases the sample variance over the standard result for Gaussian fluctuations. We identify a large scatter in the Y-M relation which will be important in searches for clusters using the SZ effect(s).

  18. The Metagalactic Ionizing Background: A Crisis in UV Photon Production or Incorrect Galaxy Escape Fractions?

    E-Print Network [OSTI]

    Shull, J Michael; Danforth, Charles W; Tilton, Evan M

    2015-01-01

    Recent suggestions of a "photon underproduction crisis" (Kollmeier et al 2014) have generated concern over the intensity and spectrum of ionizing photons in the metagalactic ultraviolet background (UVB). The balance of hydrogen photoionization and recombination determines the opacity of the low-redshift intergalactic medium (IGM). We calibrate the hydrogen photoionization rate ($\\Gamma_H$) by comparing Hubble Space Telescope spectroscopic surveys of the low-redshift column density distribution of H I absorbers to new cosmological simulations. The distribution, $f(N_{HI}, z) = d^2N/d(log N_{HI}) dz$, is consistent with an increased UVB that includes contributions from both quasars and galaxies. Our recommended fit, $\\Gamma_H(z) = (4.6x10^{-14}~s^{-1})(1+z)^{4.4}$ for $0 < z < 0.5$, corresponds to unidirectional LyC photon flux $\\Phi_0 = 5700$ cm$^{-2}$ s$^{-1}$ at z = 0. This flux agrees with observed IGM metal ionization ratios (C III / C IV and Si III / Si IV) and suggests a 25-30\\% contribution of the...

  19. Low-Metallicity Inhibition of Type Ia Supernovae and Galactic and Cosmic Chemical Evolution

    E-Print Network [OSTI]

    Chiaki Kobayashi; Takuji Tsujimoto; Ken'ich Nomoto; Izumi Hachisu; Mariko Kato

    1998-06-25

    We introduce a metallicity dependence of Type Ia supernova (SN Ia) rate into the Galactic and cosmic chemical evolution models. In our SN Ia progenitor scenario, the accreting white dwarf (WD) blows a strong wind to reach the Chandrasekhar mass limit. If the iron abundance of the progenitors is as low as [Fe/H] 1-2, SNe Ia can be found only in the environments where the timescale of metal enrichment is sufficiently short as in starburst galaxies and ellipticals. The low-metallicity inhibition of SNe Ia can shed new light on the following issues: 1) The limited metallicity range of the SN Ia progenitors would imply that ``evolution effects'' are relatively small for the use of high redshift SNe Ia to determine the cosmological parameters. 2) WDs of halo populations are poor producers of SNe Ia, so that the WD contribution to the halo mass is not constrained from the iron abundance in the halo. 3) The abundance patterns of globular clusters and field stars in the Galactic halo lack of SN Ia signatures in spite of their age difference of several Gyrs, which can be explained by the low-metallicity inhibition of SNe Ia. 4) It could also explain why the SN Ia contamination is not seen in the damped Ly\\alpha systems for over a wide range of redshift.

  20. Accretion of dust grains as a possible origin of metal-poor stars with low alpha/Fe ratios

    E-Print Network [OSTI]

    Toshikazu Shigeyama; Takuji Tsujimoto

    2003-10-10

    The origin of low alpha/Fe ratios in some metal-poor stars, so called low-alpha stars, is discussed. It is found that most of low-alpha stars in the Galaxy are on the main-sequence. This strongly suggests that these stars suffered from external pollution. It is also found that the abundance ratios Zn/Fe of low-alpha stars both in the Galaxy and in dwarf spheroidal galaxies are lower than the average value of Galactic halo stars whereas damped Ly alpha absorbers have higher ratios. This implies that some low-alpha stars accreted matter depleted from gas onto dust grains. To explain the features in these low-alpha stars, we have proposed that metal-poor stars harboring planetary systems are the origin of these low-alpha stars. Stars engulfing a small fraction of planetesimals enhance the surface content of Fe to exhibit low alpha/Fe ratios on their surfaces while they are on the main-sequence, because dwarfs have shallow surface convection zones where the engulfed matter is mixed. After the stars leave the main-sequence, the surface convection zones become deeper to reduce the enhancement of Fe. Eventually, when the stars ascend to the tip of the red giant branch, they engulf giant planets to become low-alpha stars again as observed in dwarf spheroidal galaxies. We predict that low-alpha stars with low Mn/Fe ratios harbor planetary systems.