Sample records for vleet hol ly

  1. Wadi el-Hol

    E-Print Network [OSTI]

    Darnell, John C

    2013-01-01T23:59:59.000Z

    deposit in Figure 21). Wadi el-Hol, Darnell, UEE 2013of Oxford Short Citation: Darnell, 2013, Wadi el-Hol. UEE.John Coleman, 2013, Wadi el-Hol. In Willeke Wendrich (ed. ),

  2. Isabelle/HOL and SMT Sascha Bohme

    E-Print Network [OSTI]

    Cengarle, María Victoria

    Isabelle/HOL and SMT Sascha B¨ohme Technische Universit¨at M¨unchen September 10, 2009 #12;Outline Introduction From Isabelle/HOL to SMT ... ... and back again Conclusion 1 Introduction Isabelle/HOL SMT Isabelle/HOL and SMT 2 From Isabelle/HOL to SMT ... Supported SMT Solvers Preprocessing 3 ... and back

  3. 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

  4. The Economics of HOl1icultural Biotechnology

    E-Print Network [OSTI]

    Bradford, Kent

    The Economics of HOl1icultural Biotechnology Julian M. Alston Kent J. Bradford Nicholas Kalaitzandonakes SUMMARY. Technological change has driven economic progress in agIiculture and will continue, Department of Agricultural and Resource Econom- ics, University of California, Davis and Associate Director

  5. 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let usNuclear SecurityTechnology |Living SafeLy

  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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling7111AWell:F E ,"^ I 1'DataS11973 Task!

  7. Quantitative textural analysis of packings of elongate crystals John F. Rudge Marian B. Holness Graham C. Smith

    E-Print Network [OSTI]

    Rudge, John

    · Graham C. Smith February 18, 2008 Abstract The spatial distribution of grains in a solidifying igneous: +44-1223-360779. M. B. Holness · G. C. Smith Department of Earth Sciences, Downing Street, Cambridge

  8. CURRICULUM VITAE Dr. Edward (Ted) Van Vleet

    E-Print Network [OSTI]

    Meyers, Steven D.

    Biogeochemistry American Chemical Society Hydrocarbon Pollution European Assoc. Organic Geochemists Biochemical Committee of the World Cultural Council (Mexico). Committee to choose the Albert Einstein World Award - 1987). Research: Hydrocarbon Pollution in the Dry Tortugas. Hosted Visiting Scholar (Dr. Wilhelm Hagen

  9. Mapping the Cosmic Web with Ly-alpha Emission

    E-Print Network [OSTI]

    Steven Furlanetto; Joop Schaye; Volker Springel; Lars Hernquist

    2003-10-31T23:59:59.000Z

    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.

  10. Voids in Ly{\\alpha} Forest Tomographic Maps

    E-Print Network [OSTI]

    Stark, Casey W; White, Martin; Lee, Khee-Gan

    2015-01-01T23:59:59.000Z

    We present a new method of finding cosmic voids using tomographic maps of Ly{\\alpha} forest flux. We identify cosmological voids with radii of 2 - 12 $h^{-1}$Mpc in a large N-body simulation at $z = 2.5$, and characterize the signal of the high-redshift voids in density and Ly{\\alpha} forest flux. The void properties are similar to what has been found at lower redshifts, but they are smaller and have steeper radial density profiles. Similarly to what has been found for low-redshift voids, the radial velocity profiles have little scatter and agree very well with the linear theory prediction. We run the same void finder on an ideal Ly{\\alpha} flux field and tomographic reconstructions at various spatial samplings. We compare the tomographic map void catalogs to the density void catalog and find good agreement even with modest-sized voids ($r > 6 \\, h^{-1}$Mpc). Using our simple void-finding method, the configuration of the ongoing CLAMATO survey covering 1 deg$^2$ would provide a sample of about 100 high-redshi...

  11. 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

  12. 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)

    2013-04-01T23:59:59.000Z

    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.

  13. Ly49Q, an ITIM-bearing NK receptor, positively regulates osteoclast differentiation

    SciTech Connect (OSTI)

    Hayashi, Mikihito [Department of Cell Signaling, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan) [Department of Cell Signaling, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan); Global Center of Excellence Program, International Research Center for Molecular Science in Tooth and Bone Diseases, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan); Nakashima, Tomoki [Department of Cell Signaling, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan) [Department of Cell Signaling, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan); Japan Science and Technology Agency, ERATO, Takayanagi Osteonetwork Project, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan); Global Center of Excellence Program, International Research Center for Molecular Science in Tooth and Bone Diseases, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan); Kodama, Tatsuhiko [Research Center for Advanced Science and Technology, Department of Molecular Biology and Medicine, University of Tokyo, Tokyo 153-8904 (Japan)] [Research Center for Advanced Science and Technology, Department of Molecular Biology and Medicine, University of Tokyo, Tokyo 153-8904 (Japan); Makrigiannis, Andrew P. [Laboratory of Molecular Immunology, Institute de Recherches Cliniques de Montreal, Montreal, Quebec, Canada H2W 1R7 (Canada)] [Laboratory of Molecular Immunology, Institute de Recherches Cliniques de Montreal, Montreal, Quebec, Canada H2W 1R7 (Canada); Toyama-Sorimachi, Noriko [Department of Gastroenterology, Research Institute, International Medical Center of Japan, Toyama 1-21-1, Shinjuku-ku, Tokyo 162-8655 (Japan)] [Department of Gastroenterology, Research Institute, International Medical Center of Japan, Toyama 1-21-1, Shinjuku-ku, Tokyo 162-8655 (Japan); Takayanagi, Hiroshi, E-mail: taka.csi@tmd.ac.jp [Department of Cell Signaling, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan) [Department of Cell Signaling, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan); Japan Science and Technology Agency, ERATO, Takayanagi Osteonetwork Project, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan); Global Center of Excellence Program, International Research Center for Molecular Science in Tooth and Bone Diseases, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549 (Japan)

    2010-03-12T23:59:59.000Z

    Osteoclasts, multinucleated cells that resorb bone, play a key role in bone remodeling. Although immunoreceptor tyrosine-based activation motif (ITAM)-mediated signaling is critical for osteoclast differentiation, the significance of immunoreceptor tyrosine-based inhibitory motif (ITIM) has not been well understood. Here we report the function of Ly49Q, an Ly49 family member possessing an ITIM motif, in osteoclastogenesis. Ly49Q is selectively induced by receptor activator of nuclear factor-{kappa}B (NF-{kappa}B) ligand (RANKL) stimulation in bone marrow-derived monocyte/macrophage precursor cells (BMMs) among the Ly49 family of NK receptors. The knockdown of Ly49Q resulted in a significant reduction in the RANKL-induced formation of tartrate-resistance acid phosphatase (TRAP)-positive multinucleated cells, accompanied by a decreased expression of osteoclast-specific genes such as Nfatc1, Tm7sf4, Oscar, Ctsk, and Acp5. Osteoclastogenesis was also significantly impaired in Ly49Q-deficient cells in vitro. The inhibitory effect of Ly49Q-deficiency may be explained by the finding that Ly49Q competed for the association of Src-homology domain-2 phosphatase-1 (SHP-1) with paired immunoglobulin-like receptor-B (PIR-B), an ITIM-bearing receptor which negatively regulates osteoclast differentiation. Unexpectedly, Ly49Q deficiency did not lead to impaired osteoclast formation in vivo, suggesting the existence of a compensatory mechanism. This study provides an example in which an ITIM-bearing receptor functions as a positive regulator of osteoclast differentiation.

  14. Wadi el-Hol

    E-Print Network [OSTI]

    Darnell, John C

    2013-01-01T23:59:59.000Z

    1 and 13 - 16) for the Htp-nTr of Amun at Karnak (Darnell154 [WHRI 39]—a mention of the Htp-nTr nj Jmn ). Epigraphic

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

    E-Print Network [OSTI]

    Gill-Peterson, Julian

    2012-01-01T23:59:59.000Z

    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. THE BOSS Ly{alpha} FOREST SAMPLE FROM SDSS DATA RELEASE 9

    SciTech Connect (OSTI)

    Lee, Khee-Gan [Max Planck Institute for Astronomy, Koenigstuhl 17, D-69115 Heidelberg (Germany); Bailey, Stephen; Carithers, William; Schlegel, David J. [Lawrence Berkeley National Lab, 1 Cyclotron Rd, Berkeley, CA 94720 (United States); Bartsch, Leslie E. [Department of Physics, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213 (United States); Dawson, Kyle S.; Bolton, Adam S. [Department of Physics and Astronomy, University of Utah, 115 S 1400 E, Salt Lake City, UT 84112 (United States); Kirkby, David; Margala, Daniel; Blomqvist, Michael [Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States); Lundgren, Britt [Department of Astronomy, University of Wisconsin, 475 North Charter Street, Madison, WI 53706 (United States); Palanque-Delabrouille, Nathalie; Yeche, Christophe; Borde, Arnaud [CEA, Centre de Saclay, Irfu/SPP, F-91191 Gif-sur-Yvette (France); Pieri, Matthew M. [Institute of Cosmology and Gravitation, Dennis Sciama Building, University of Portsmouth, Portsmouth, PO1 3FX (United Kingdom); Weinberg, David H. [Department of Astronomy and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210 (United States); Aubourg, Eric; Bautista, Julian [APC, Universite Paris Diderot-Paris 7, CNRS/IN2P3, CEA, Observatoire de Paris, 10, rueA. Domon and L. Duquet, Paris (France); Bizyaev, Dmitry; Brewington, Howard, E-mail: lee@mpia.de [Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349 (United States); and others

    2013-03-15T23:59:59.000Z

    We present the BOSS Lyman-{alpha} (Ly{alpha}) Forest Sample from SDSS Data Release 9, comprising 54,468 quasar spectra with z{sub qso} > 2.15 suitable for Ly{alpha} forest analysis. This data set probes the intergalactic medium with absorption redshifts 2.0 < z{sub {alpha}} < 5.7 over an area of 3275 deg{sup 2}, and encompasses an approximate comoving volume of 20 h {sup -3} Gpc{sup 3}. With each spectrum, we have included several products designed to aid in Ly{alpha} forest analysis: improved sky masks that flag pixels where data may be unreliable, corrections for known biases in the pipeline estimated noise, masks for the cores of damped Ly{alpha} systems and corrections for their wings, and estimates of the unabsorbed continua so that the observed flux can be converted to a fractional transmission. The continua are derived using a principal component fit to the quasar spectrum redward of rest-frame Ly{alpha} ({lambda} > 1216 A), extrapolated into the forest region and normalized by a linear function to fit the expected evolution of the Ly{alpha} forest mean flux. The estimated continuum errors are {approx}< 5% rms. We also discuss possible systematics arising from uncertain spectrophotometry and artifacts in the flux calibration; global corrections for the latter are provided. Our sample provides a convenient starting point for users to analyze clustering in BOSS Ly{alpha} forest data, and it provides a fiducial data set that can be used to compare results from different analyses of baryon acoustic oscillations in the Ly{alpha} forest. The full data set is available from the SDSS-III DR9 Web site.

  17. 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

    2009-05-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    .G. Ioannou and L.Y. Liu Advanced Construction Technology System ­ ACTS 2 INTRODUCTION The rising cost, and to decrease costs. New technology provides a driving force to change decisions at the design stageP.G. Ioannou and L.Y. Liu Advanced Construction Technology System ­ ACTS 1 Advanced Construction

  19. PROPERTIES OF LY-AND GAMMA RAY BURST SELECTED STARBURSTS AT HIGH REDSHIFTS

    E-Print Network [OSTI]

    Fynbo, Johan

    , Palle Møller6, Bjarne Thomsen3 1Niels Bohr Institute, University of Copenhagen, Denmark 2Nordic Optical (Partridge & Peebles 1967). The first detection of redshifted Ly- emis- sion from galaxies not powered counterparts of QSO ab- sorbers such as DLAs and Lyman-limit system

  20. Automated verification of termination certificates Frederic Blanqui and Kim Quyen Ly

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Automated verification of termination certificates Fr´ed´eric Blanqui and Kim Quyen Ly INRIA in developing a standalone tool for checking the correctness of certificates for the termination of term rewrite the extraction mechanism of Coq and the library on rewriting theory and termination called CoLoR. I. INTRODUCTION

  1. THE CHANDRA DEEP PROTOCLUSTER SURVEY: Ly{alpha} BLOBS ARE POWERED BY HEATING, NOT COOLING

    SciTech Connect (OSTI)

    Geach, J. E.; Alexander, D. M.; Lehmer, B. D.; Matsuda, Y. [Department of Physics, Durham University, South Road, Durham DH1 3LE (United Kingdom); Smail, Ian; Bower, R. G. [Institute for Computational Cosmology, Department of Physics, Durham University, South Road, Durham DH1 3LE (United Kingdom); Chapman, S. C. [Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA (United Kingdom); Scharf, C. A.; Bauer, F. E.; Basu-Zych, A. [Columbia Astrophysics Laboratory, Columbia University, Pupin Laboratories, 550 West 120th Street, Room 1418, New York, NY 10027 (United States); Ivison, R. J. [SUPA, Institute for Astronomy, Royal Observatory of Edinburgh, Blackford Hill, Edinburgh, EH9 3HJ (United Kingdom); Volonteri, M. [Department of Astronomy, University of Michigan, Ann Arbor, MI (United States); Yamada, T. [National Astronomical Observatory of Japan, Tokyo 181-8588 (Japan); Blain, A. W. [Department of Astronomy, California Institute of Technology, MC 105-24, 1200, East California Boulevard, Pasadena, CA 91125 (United States)], E-mail: j.e.geach@durham.ac.uk

    2009-07-20T23:59:59.000Z

    We present the results of a 400 ks Chandra survey of 29 extended Ly{alpha} emitting nebulae (Ly{alpha} Blobs, LABs) in the z = 3.09 protocluster in the SS A22 field. We detect luminous X-ray counterparts in five LABs, implying a large fraction of active galactic nuclei (AGN) in LABs, f{sub AGN} = 17{sup +12}{sub -7}% down to L{sub 2-32keV} {approx} 10{sup 44} erg s{sup -1}. All of the AGN appear to be heavily obscured, with spectral indices implying obscuring column densities of N{sub H} > 10{sup 23} cm{sup -2}. The AGN fraction should be considered a lower limit, since several more LABs not detected with Chandra show AGN signatures in their mid-infrared (mid-IR) emission. We show that the UV luminosities of the AGN are easily capable of powering the extended Ly{alpha} emission via photoionization alone. When combined with the UV flux from a starburst component, and energy deposited by mechanical feedback, we demonstrate that 'heating' by a central source, rather than gravitational cooling is the most likely power source of LABs. We argue that all LABs could be powered in this manner, but that the luminous host galaxies are often just below the sensitivity limits of current instrumentation, or are heavily obscured. No individual LABs show evidence for extended X-ray emission, and a stack equivalent to a {approx}>9 Ms exposure of an average LAB also yields no statistical detection of a diffuse X-ray component. The resulting diffuse X-ray/Ly{alpha} luminosity limit implies there is no hot (T {approx}> 10{sup 7} K) gas component in these halos, and also rules out inverse Compton scattering of cosmic microwave background photons, or local far-IR photons, as a viable power source for LABs.

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

    E-Print Network [OSTI]

    Polinovskyi, G

    2011-01-01T23:59:59.000Z

    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 $&...

  3. MEAN-FLUX-REGULATED PRINCIPAL COMPONENT ANALYSIS CONTINUUM FITTING OF SLOAN DIGITAL SKY SURVEY Ly{alpha} FOREST SPECTRA

    SciTech Connect (OSTI)

    Lee, Khee-Gan; Spergel, David N. [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States); Suzuki, Nao, E-mail: lee@astro.princeton.edu [E.O. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States)

    2012-02-15T23:59:59.000Z

    Continuum fitting is an important aspect of Ly{alpha} forest science, since errors in the derived optical depths scale with the fractional continuum error. However, traditional methods of estimating continua in noisy and moderate-resolution spectra (e.g., Sloan Digital Sky Survey, SDSS; S/N {approx}< 10 pixel{sup -1} and R {approx} 2000), such as power-law extrapolation or dividing by the mean spectrum, achieve no better than {approx}15% rms accuracy. To improve on this, we introduce mean-flux-regulated principal component analysis (MF-PCA) continuum fitting. In this technique, PCA fitting is carried out redward of the quasar Ly{alpha} line in order to provide a prediction for the shape of the Ly{alpha} forest continuum. The slope and amplitude of this continuum prediction is then corrected using external constraints for the Ly{alpha} forest mean flux. This requires prior knowledge of the mean flux, (F), but significantly improves the accuracy of the flux transmission, F {identical_to} exp (- {tau}), estimated from each pixel. From tests on mock spectra, we find that MF-PCA reduces the errors to 8% rms in S/N {approx} 2 spectra, and <5% rms in spectra with S/N {approx}> 5. The residual Fourier power in the continuum is decreased by a factor of a few in comparison with dividing by the mean continuum, enabling Ly{alpha} flux power spectrum measurements to be extended to {approx}2 Multiplication-Sign larger scales. Using this new technique, we make available continuum fits for 12,069 z > 2.3 Ly{alpha} forest spectra from SDSS Data Release 7 for use by the community. This technique is also applicable to future releases of the ongoing Baryon Oscillations Spectroscopic Survey, which obtains spectra for {approx}150, 000 Ly{alpha} forest spectra at low signal-to-noise (S/N {approx} 2).

  4. THRESHOLD PROBABILITY FUNCTIONS AND THERMAL INHOMOGENEITIES IN THE Ly{alpha} FOREST

    SciTech Connect (OSTI)

    Lee, Khee-Gan; Spergel, David N., E-mail: lee@astro.princeton.edu, E-mail: dns@astro.princeton.edu [Department of Astrophysical Science, Princeton University, Princeton, NJ 08544 (United States)

    2011-06-10T23:59:59.000Z

    We introduce to astrophysics the threshold probability functions S{sub 2}, C{sub 2}, and D{sub 2} first derived by Torquato et al., which effectively samples the flux probability distribution function (PDF) of the Ly{alpha} forest at different spatial scales. These statistics are tested on mock Ly{alpha} forest spectra based on various toy models for He II reionization, with homogeneous models with various temperature-density relations as well as models with temperature inhomogeneities. These mock samples have systematics and noise added to simulate the latest Sloan Digital Sky Survey Data Release 7 (SDSS DR7) data. We find that the flux PDF from SDSS DR7 can be used to constrain the temperature-density relation {gamma} (where T{proportional_to}(1 + {Delta}){sup {gamma}-1}) of the intergalactic medium (IGM) at z = 2.5 to a precision of {Delta}{gamma} = 0.2 at {approx}4{sigma} confidence. The flux PDF is degenerate to temperature inhomogeneities in the IGM arising from He II reionization, but we find S{sub 2} can detect these inhomogeneities at {approx}3{sigma}, with the assumption that the flux continuum of the Ly{alpha} forest can be determined to 9% accuracy, approximately the error from current fitting methods. If the flux continuum can be determined to 3% accuracy, then S{sub 2} is capable of constraining the characteristic scale of temperature inhomogeneities, with {approx}4{sigma} differentiation between toy models with hot bubble radii of 50 h{sup -1} Mpc and 25 h{sup -1} Mpc.

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

    E-Print Network [OSTI]

    T. Roy Choudhury; T. Padmanabhan

    2002-04-01T23:59:59.000Z

    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.

  6. 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling7 AugustAFRICAN3u ;;;:: A' 3 ct')s . l-@-Y?.

  7. SYSTEMATIC CONTINUUM ERRORS IN THE Ly{alpha} FOREST AND THE MEASURED TEMPERATURE-DENSITY RELATION

    SciTech Connect (OSTI)

    Lee, Khee-Gan, E-mail: lee@astro.princeton.edu [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)

    2012-07-10T23:59:59.000Z

    Continuum fitting uncertainties are a major source of error in estimates of the temperature-density relation (usually parameterized as a power-law, T {proportional_to} {Delta}{sup {gamma}-1}) of the intergalactic medium through the flux probability distribution function (PDF) of the Ly{alpha} forest. Using a simple order-of-magnitude calculation, we show that few percent-level systematic errors in the placement of the quasar continuum due to, e.g., a uniform low-absorption Gunn-Peterson component could lead to errors in {gamma} of the order of unity. This is quantified further using a simple semi-analytic model of the Ly{alpha} forest flux PDF. We find that under(over)estimates in the continuum level can lead to a lower (higher) measured value of {gamma}. By fitting models to mock data realizations generated with current observational errors, we find that continuum errors can cause a systematic bias in the estimated temperature-density relation of ({delta}({gamma})) Almost-Equal-To -0.1, while the error is increased to {sigma}{sub {gamma}} Almost-Equal-To 0.2 compared to {sigma}{sub {gamma}} Almost-Equal-To 0.1 in the absence of continuum errors.

  8. A Damped Ly-alpha Absorption-line System in an Apparent Void at Redshift 2.38

    E-Print Network [OSTI]

    L. E. H. Godfrey; P. J. Francis

    2005-06-22T23:59:59.000Z

    We study the contents of an apparent void in the distribution of Ly-alpha emitting galaxies at redshift 2.38. We show that this void is not empty, but contains a damped Ly-alpha absorption-line system, seen in absorption against background QSO 2138-4427. Imaging does not reveal any galaxy associated with this absorption-line system, but it contains metals (Fe/H ~ -1.3), and its large velocity range (~ 180 km/s) implies a significant mass.

  9. 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

  10. 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

    2013-01-01T23:59:59.000Z

    [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 ...

  11. CHEMICAL ENRICHMENT IN THE CARBON-ENHANCED DAMPED Ly{alpha} SYSTEM BY POPULATION III SUPERNOVAE

    SciTech Connect (OSTI)

    Kobayashi, Chiaki [Research School of Astronomy and Astrophysics, The Australian National University, Cotter Road, Weston, ACT 2611 (Australia); Tominaga, Nozomu; Nomoto, Ken'ichi, E-mail: chiaki@mso.anu.edu.au [Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583 (Japan)

    2011-04-01T23:59:59.000Z

    We show that the recently observed elemental abundance pattern of the carbon-rich metal-poor damped Ly{alpha} (DLA) system is in excellent agreement with the nucleosynthesis yields of faint core-collapse supernovae of primordial stars. The observed abundance pattern is not consistent with the nucleosynthesis yields of pair-instability supernovae. The DLA abundance pattern is very similar to that of carbon-rich extremely metal-poor (EMP) stars, and the contributions from low-mass stars and/or binary effects should be very small in DLAs. This suggests that chemical enrichment by the first stars in the first galaxies is driven by core-collapse supernovae from {approx}20 to 50 M{sub sun} stars and also supports the supernova scenario as the enrichment source of EMP stars in the Milky Way Galaxy.

  12. Effects of excitation laser wavelength on Ly-a and He-a line emission from nitrogen plasmas

    E-Print Network [OSTI]

    Harilal, S. S.

    to the wave- length of the light used, and hence, shorter wavelengths in the soft x-ray region provide higher are soft x-ray lasers,6,7 laser-produced plasma (LPP) sources,8­11 and higher har- monics from laser heatedV (2.88 nm).1 Being on the higher energy side of the WW region, Ly-a and He-a nitrogen lines are more

  13. KECK SPECTROSCOPY OF LYMAN-BREAK GALAXIES AND ITS IMPLICATIONS FOR THE UV-CONTINUUM AND Ly{alpha} LUMINOSITY FUNCTIONS AT z > 6

    SciTech Connect (OSTI)

    Jiang Linhua; Egami, Eiichi; Walth, Gregory [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Kashikawa, Nobunari [Optical and Infrared Astronomy Division, National Astronomical Observatory, Mitaka, Tokyo 181-8588 (Japan); Matsuda, Yuichi [Department of Physics, Durham University, South Road, Durham DH1 3LE (United Kingdom); Shimasaku, Kazuhiro [Department of Astronomy, University of Tokyo, Hongo, Tokyo 113-0033 (Japan); Nagao, Tohru [Research Center for Space and Cosmic Evolution, Ehime University, Bunkyo-cho, Matsuyama 790-8577 (Japan); Ota, Kazuaki [Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502 (Japan); Ouchi, Masami [Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa City, Chiba 77-8582 (Japan)

    2011-12-10T23:59:59.000Z

    We present Keck spectroscopic observations of z > 6 Lyman-break galaxy (LBG) candidates in the Subaru Deep Field (SDF). The candidates were selected as i'-dropout objects down to z' = 27 AB magnitudes from an ultra-deep SDF z'-band image. With the Keck spectroscopy we identified 19 LBGs with prominent Ly{alpha} emission lines at 6 {<=} z {<=} 6.4. The median value of the Ly{alpha} rest-frame equivalent widths (EWs) is {approx}50 A, with four EWs >100 A. This well-defined spectroscopic sample spans a UV-continuum luminosity range of -21.8 {<=} M{sub UV} {<=} -19.5 (0.6 {approx} 5 L*{sub UV}) and a Ly{alpha} luminosity range of (0.3-3) Multiplication-Sign 10{sup 43} erg s{sup -1} (0.3-3 L*{sub Ly{alpha}}). We derive the UV and Ly{alpha} luminosity functions (LFs) from our sample at (z) {approx} 6.2 after we correct for sample incompleteness. We find that our measurement of the UV LF is consistent with the results of previous studies based on photometric LBG samples at 5 < z < 7. Our Ly{alpha} LF is also generally in agreement with the results of Ly{alpha}-emitter surveys at z {approx} 5.7 and 6.6. This study shows that deep spectroscopic observations of LBGs can provide unique constraints on both the UV and Ly{alpha} LFs at z > 6.

  14. RESOLVING THE OPTICAL EMISSION LINES OF Ly{alpha} BLOB ''B1'' AT z = 2.38: ANOTHER HIDDEN QUASAR

    SciTech Connect (OSTI)

    Overzier, R. A. [Department of Astronomy, University of Texas at Austin, 1 University Station C1400, Austin, TX 78712 (United States); Nesvadba, N. P. H. [Institut d'Astrophysique Spatiale, CNRS, Universite Paris-Sud, F-91405 Orsay (France); Dijkstra, M. [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Str. 1, D-85741 Garching (Germany); Hatch, N. A. [School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom); Lehnert, M. D. [GEPI, Observatoire de Paris, UMR 8111, CNRS, Universite Paris Diderot, 5 place Jules Janssen, F-92190 Meudon (France); Villar-Martin, M. [Centro de Astrobioloia (INTA-CSIC), Carretera de Ajalvir, km 4, E-28850 Torrejon de Ardoz, Madrid (Spain); Wilman, R. J. [Department of Physics, University of Durham, South Road, Durham DH13LE (United Kingdom); Zirm, A. W., E-mail: overzier@astro.as.utexas.edu [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen (Denmark)

    2013-07-10T23:59:59.000Z

    We have used the SINFONI near-infrared integral field unit on the Very Large Telescope to resolve the optical emission line structure of one of the brightest (L{sub Ly{alpha}} Almost-Equal-To 10{sup 44} erg s{sup -1}) and nearest (z Almost-Equal-To 2.38) of all Ly{alpha} blobs (LABs). The target, known in the literature as object {sup B}1{sup ,} lies at a redshift where the main optical emission lines are accessible in the observed near-infrared. We detect luminous [O III] {lambda}{lambda}4959, 5007 and H{alpha} emission with a spatial extent of at least 32 Multiplication-Sign 40 kpc (4'' Multiplication-Sign 5''). The dominant optical emission line component shows relatively broad lines (600-800 km s{sup -1}, FWHM) and line ratios consistent with active galactic nucleus (AGN) photoionization. The new evidence for AGN photoionization, combined with previously detected C IV and luminous, warm infrared emission, suggest that B1 is the site of a hidden quasar. This is confirmed by the fact that [O II] is relatively weak compared with [O III] (extinction-corrected [O III]/[O II] of about 3.8), which is indicative of a high, Seyfert-like ionization parameter. From the extinction-corrected [O III] luminosity we infer a bolometric AGN luminosity of {approx}3 Multiplication-Sign 10{sup 46} erg s{sup -1}, and further conclude that the obscured AGN may be Compton-thick given existing X-ray limits. The large line widths observed are consistent with clouds moving within the narrow-line region of a luminous QSO. The AGN scenario is capable of producing sufficient ionizing photons to power the Ly{alpha}, even in the presence of dust. By performing a census of similar objects in the literature, we find that virtually all luminous LABs harbor obscured quasars. Based on simple duty-cycle arguments, we conclude that AGNs are the main drivers of the Ly{alpha} in LABs rather than the gravitational heating and subsequent cooling suggested by cold stream models. We also conclude that the empirical relation between LABs and overdense environments at high redshift must be due to a more fundamental correlation between AGNs (or massive galaxies) and environment.

  15. 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

    2015-01-01T23:59:59.000Z

    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 ...

  16. 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

  17. PROBING THE INTERGALACTIC MEDIUM/GALAXY CONNECTION. V. ON THE ORIGIN OF Ly? AND O VI ABSORPTION AT z < 0.2

    E-Print Network [OSTI]

    Prochaska, J. Xavier

    We analyze the association of galaxies with Ly? and O VI absorption, the most commonly detected transitions of the low-z intergalactic medium (IGM), in the fields of 14 quasars with z[subscript em] = 0.06–0.57. Confirming ...

  18. Harnad, Stevan (2010) Open Access den grnne vej til maksimering af forskningseffekten (INTERVIEW). Bibliotek og Medier 4 December 2010 http://bit.ly/BibMedHarnad

    E-Print Network [OSTI]

    Carr, Leslie

    2010-01-01T23:59:59.000Z

    (INTERVIEW). Bibliotek og Medier 4 December 2010 http://bit.ly/BibMedHarnad Stevan Harnad ­ On Green Open Publishing. Washington, DC., Association of Research Libraries, June 1995. http there are two ways to provide OA: the green road and golden roads to OA. Could you explain the concepts

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

    E-Print Network [OSTI]

    Pisaric, Michael

    ; revised manuscript accepted 30 January 2002 Abstract: Changes in pollen and stomata assemblages Columbia re ect vegetation and inferred climatic change throughout the Holocene. Pollen and stomata records elevation of subalpine treeline. The pollen and stomata records from BC2 indicate that an ephemeral shrub

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

    E-Print Network [OSTI]

    Gilli, Adrian

    November 2011The Holocene Ariztegui, Marian Fujak and Yvonne Hamann Julie Elbert, Martin Grosjean, Lucien

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

    E-Print Network [OSTI]

    in Laguna Potrok Aike, southern Patagonia, since the Published by: http://www.sagepublications.com can in southern Patagonia are relatively scarce though essential for understanding paleocli- matic evolution.g. Ariz- tegui et al., 2008). Previous paleolimnological investigations in southern Patagonia include

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

    E-Print Network [OSTI]

    Gilli, Adrian

    of decadal-scale variability of Mediterranean vegetation and climate at Pantelleria Island, Published by, it is difficult to ascribe the importance of climatic change for vegetation dynamics in heavily disturbed disturbances such as grazing and fire. Vegetation change in the Mediterranean region is widely ascribed

  3. THE FIRST SYSTEMATIC SURVEY FOR Ly{alpha} EMITTERS AT z = 7.3 WITH RED-SENSITIVE SUBARU/SUPRIME-CAM

    SciTech Connect (OSTI)

    Shibuya, Takatoshi; Kashikawa, Nobunari; Iye, Masanori [Department of Astronomical Science, Graduate University for Advanced Studies, Mitaka, Tokyo 181-8588 (Japan); Ota, Kazuaki [Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502 (Japan); Ouchi, Masami [Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582 (Japan); Furusawa, Hisanori [Optical and Infrared Astronomy Division, National Astronomical Observatory, Mitaka, Tokyo 181-8588 (Japan); Shimasaku, Kazuhiro [Department of Astronomy, Graduate School of Science, University of Tokyo, Tokyo 113-0033 (Japan); Hattori, Takashi, E-mail: takatoshi.shibuya@nao.ac.jp [Subaru Telescope, 650 North A'ohoku Place, Hilo, HI 96720 (United States)

    2012-06-20T23:59:59.000Z

    We have performed deep imaging surveys for Ly{alpha} emitters (LAEs) at redshift {approx}7.3 in two blank fields, the Subaru Deep Field (SDF) and the Subaru/XMM-Newton Deep survey Field (SXDF), using the Subaru/Suprime-Cam equipped with new red-sensitive CCDs and a new narrowband filter, NB1006 ({lambda}{sub c} = 10052 Angstrom-Sign , FWHM {Delta}{lambda} = 214 A). We identified four objects as LAE candidates that exhibit luminosity excess in NB1006. By carrying out deep follow-up spectroscopy for three of them using Subaru/FOCAS and Keck/DEIMOS, a definitively asymmetric emission line is detected for one of them, SXDF-NB1006-2. Assuming this line is Ly{alpha}, this object is an LAE at z = 7.215 which has a luminosity of 1.2{sup +1.5}{sub -0.6} Multiplication-Sign 10{sup 43} erg s{sup -1} and a weighted skewness S{sub {omega}} = 4.90 {+-} 0.86. Another object, SDF-NB1006-2, shows variable photometry and is thus probably a quasar (QSO) or an active galactic nucleus. It shows an asymmetric emission line at 10076 A which may be due to either Ly{alpha} at z = 7.288 or [O II] at z = 1.703. The third object, SDF-NB1006-1, is likely a galaxy with temporal luminosity enhancement associated with a supernova explosion, as the brightness of this object varies between the observed epochs. Its spectrum does not show any emission lines. The inferred decrease in the number density of LAEs toward higher redshift is n{sup z={sup {sup 7.3}{sub Ly{alpha}}}}/n{sub Ly{alpha}}{sup z={sup {sup 5.7}}} = 0.05{sup +0.11}{sub -0.05} from z = 5.7 to 7.3 down to L{sup Ly{alpha}} = 1.0 Multiplication-Sign 10{sup 43} erg s{sup -1}. The present result is consistent with the interpretation in previous studies that the neutral hydrogen fraction is rapidly increasing from z = 5.7 to 7.3.

  4. CHEMICAL ENRICHMENT OF DAMPED Ly{alpha} SYSTEMS AS A DIRECT CONSTRAINT ON POPULATION III STAR FORMATION

    SciTech Connect (OSTI)

    Kulkarni, Girish; Hennawi, Joseph F. [Max Planck Institute for Astronomy, Koenigstuhl 17, D-69117 Heidelberg (Germany); Rollinde, Emmanuel; Vangioni, Elisabeth, E-mail: girish@mpia-hd.mpg.de [Institut d'Astrophysique de Paris, UMR 7095, UPMC, Paris VI, 98 bis boulevard Arago, F-75014 Paris (France)

    2013-08-01T23:59:59.000Z

    Observations of damped Ly{alpha} absorbers (DLAs) can be used to measure gas-phase metallicities at large cosmological look-back times with high precision. Furthermore, relative abundances can still be measured accurately deep into the reionization epoch (z > 6) using transitions redward of Ly{alpha}, even though Gunn-Peterson absorption precludes measurement of neutral hydrogen. In this paper, we study the chemical evolution of DLAs using a model for the coupled evolution of galaxies and the intergalactic medium (IGM), which is constrained by a variety of observations. Our goal is to explore the influence of Population III stars on the abundance patterns of DLAs to determine the degree to which abundance measurements can discriminate between different Population III stellar initial mass functions (IMFs). We include effects, such as inflows onto galaxies due to cosmological accretion and outflows from galaxies due to supernova feedback. A distinct feature of our model is that it self-consistently calculates the effect of Population III star formation on the reionization of an inhomogeneous IGM, thus allowing us to calculate the thermal evolution of the IGM and implement photoionization feedback on low-mass galaxy formation. We find that if the critical metallicity of Population III to II/I transition is {approx}< 10{sup -4} Z{sub Sun }, then the cosmic Population III star formation rate drops to zero for z < 8. Nevertheless, at high redshift (z {approx} 6), chemical signatures of Population III stars remain in low-mass galaxies (halo mass {approx}< 10{sup 9} M{sub Sun }). This is because photoionization feedback suppresses star formation in these galaxies until relatively low redshift (z {approx} 10), and the chemical record of their initial generation of Population III stars is retained. We model DLAs as these low-mass galaxies, and assign to them a mass-dependent H I absorption cross-section in order to predict the expected distribution of DLA abundance ratios. We find that these distributions are anchored toward abundance ratios set by Population II supernova yields, but they exhibit a tail which depends significantly on the Population III IMF for z > 5. Thus, a sample of DLA metallicity and relative abundance measurements at high redshift holds the promise to constrain Population III enrichment and the Population III IMF. We find that a sample of just 10 DLAs with relative abundances measured to an accuracy of 0.1 dex is sufficient to constrain the Population III IMF at 4{sigma}. These constraints may prove stronger than other probes of Population III enrichment, such as metal-poor stars and individual metal-poor DLAs. Our results provide a global picture of the thermal, ionization, and chemical evolution of the universe, and have the potential to rule out certain Population III scenarios.

  5. 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)

    2013-06-01T23:59:59.000Z

    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.

  6. Living SafeLy

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

    the metallic object. Such objects include vehicles, fences, metal buildings or roofs and irrigation systems that are near the line or parallel the line for some distance....

  7. Identification of the brightest Ly\\alpha\\ emitters at z=6.6: implications for the evolution of the luminosity function in the re-ionisation era

    E-Print Network [OSTI]

    Matthee, Jorryt; Santos, Sérgio; Röttgering, Huub; Darvish, Behnam; Mobasher, Bahram

    2015-01-01T23:59:59.000Z

    Using wide field narrow-band surveys, we provide a new measurement of the $z=6.6$ Lyman-$\\alpha$ Emitter (LAE) luminosity function (LF), which constraints the bright end for the first time. We use a combination of archival narrow-band NB921 data in UDS and new NB921 measurements in SA22 and COSMOS/UltraVISTA, all observed with the Subaru telescope, with a total area of $\\sim 5$ deg$^2$. We exclude lower redshift interlopers by using broad-band optical and near-infrared photometry and also exclude three supernovae with data split over multiple epochs. We spectroscopically confirm the two most luminous Ly$\\alpha$ emitters ever found at $z=6.604$ and $6.541$ in the COSMOS field using Keck/DEIMOS and VLT/FORS2. Combining the UDS and COSMOS samples we find no evolution of the bright end of the Ly$\\alpha$ LF between $z=5.7$ and $6.6$, which is supported by spectroscopic follow-up, and conclude that \\emph{Himiko}-like sources are not as rare as previously thought, with number densities of $\\sim 1.5\\times10^{-5}$ Mpc...

  8. Probing primordial non-Gaussianity: the 3D Bispectrum of Ly-? forest and the redshifted 21-cm signal from the post reionization epoch

    SciTech Connect (OSTI)

    Sarkar, Tapomoy Guha [Department of Physics, Birla Institute of Technology and Science, Pilani, Rajasthan (India); Hazra, Dhiraj Kumar, E-mail: tapomoy@bits-pilani.ac.in, E-mail: dhiraj@apctp.org [Harish-Chandra Research Institute Chhatnag Road, Jhunsi, Allahabad 211019 (India)

    2013-04-01T23:59:59.000Z

    We explore possibility of using the three dimensional bispectra of the Ly-? forest and the redshifted 21-cm signal from the post-reionization epoch to constrain primordial non-Gaussianity. Both these fields map out the large scale distribution of neutral hydrogen and maybe treated as tracers of the underlying dark matter field. We first present the general formalism for the auto and cross bispectrum of two arbitrary three dimensional biased tracers and then apply it to the specific case. We have modeled the 3D Ly-? transmitted flux field as a continuous tracer sampled along 1D skewers which corresponds to quasars sight lines. For the post reionization 21-cm signal we have used a linear bias model. We use a Fisher matrix analysis to present the first prediction for bounds on f{sub NL} and the other bias parameters using the three dimensional 21-cm bispectrum and other cross bispectra. The bounds on f{sub NL} depend on the survey volume, and the various observational noises. We have considered a BOSS like Ly-? survey where the average number density of quasars n-bar = 10{sup ?3}Mpc{sup ?2} and the spectra are measured at a 2-? level. For the 21-cm signal we have considered a 4000 hrs observation with a futuristic SKA like radio array. We find that bounds on f{sub NL} obtained in our analysis (6 ? ?f{sub NL} ? 65) is competitive with CMBR and galaxy surveys and may prove to be an important alternative approach towards constraining primordial physics using future data sets. Further, we have presented a hierarchy of power of the bispectrum-estimators towards detecting the f{sub NL}. Given the quality of the data sets, one may use this method to optimally choose the right estimator and thereby provide better constraints on f{sub NL}. We also find that by combining the various cross-bispectrum estimators it is possible to constrain f{sub NL} at a level ?f{sub NL} ? 4.7. For the equilateral and orthogonal template we obtain ?f{sub NL}{sup equ} ? 17 and ?f{sub NL}{sup orth} ? 13 respectively for the combined estimator. This shall be important in the quest towards understanding the mechanism behind the generation of primordial perturbations.

  9. Utilizing spatial technologies to understand and model wildlife species distributions

    E-Print Network [OSTI]

    Daugherty, Brad Ellis

    2000-01-01T23:59:59.000Z

    Locus t (Gleditsia triacanthos) 7 10 9 G reen A s h (Fraxinus pennsylvanica) - Ceda r Elm - Suga r Hackbe r ry 2 2 3 Honey Locus t - C e d a r E lm - Haw tho rne (Crataegus laevigata) - Dec iduous Hol ly (Ilex verticillata) 7 7 8 P laner T ree...

  10. A newly discovered DLA and associated Ly-alpha emission in the spectra of the gravitationally lensed quasar UM 673A,B

    E-Print Network [OSTI]

    Cooke, Ryan; Steidel, Charles C; King, Lindsay J; Rudie, Gwen C; Rakic, Olivera

    2010-01-01T23:59:59.000Z

    The sightline to the brighter member of the gravitationally lensed quasar pair UM 673A,B intersects a damped Lyman-alpha system (DLA) at z = 1.62650 which, because of its low redshift, has not been recognised before. Our high quality echelle spectra of the pair, obtained with HIRES on the Keck I telescope, show a drop in neutral hydrogen column density N(H I) by a factor of at least 400 between UM 673A and B, indicating that the DLA's extent in this direction is much less than the 2.7 kpc separation between the two sightlines at z = 1.62650. By reassessing this new case together with published data on other QSO pairs, we conclude that the typical size (radius) of DLAs at these redshifts is R ~ (5 +/- 3) kpc, smaller than previously realised. Highly ionized gas associated with the DLA is more extended, as we find only small differences in the C IV absorption profiles between the two sightlines. Coincident with UM 673B, we detect a weak and narrow Ly-alpha emission line which we attribute to star formation acti...

  11. Interactive Proof Discover: An Empirical Study of HOL Users

    E-Print Network [OSTI]

    Aitken, S.; Gray, P.; Melham, T.F.

    Aitken,S. Gray,P. Melham,T.F. Thomas,M. User Interface Design for Theorem Proving Systems: an International Workshop University of Glasgow

  12. A METAL-STRONG AND DUST-RICH DAMPED Ly{alpha} ABSORPTION SYSTEM TOWARD THE QUASAR SDSS J115705.52+615521.7

    SciTech Connect (OSTI)

    Wang Jianguo [National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650011 (China); Zhou Hongyan; Jiang Peng; Lu Honglin; Wang Huiyuan; Wang Tinggui [Key Laboratory for Research in Galaxies and Cosmology, Department for Astronomy, University of Sciences and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026 (China); Ge Jian; Hamann, Fred [Astronomy Department, University of Florida, 211 Bryant Space Science Center, P.O. Box 112055, Gainesville, FL 32611 (United States); Xavier Prochaska, J. [Department of Astronomy and Astrophysics, UCO/Lick Observatory, University of California, 1156 High Street, Santa Cruz, CA 95064 (United States); Yuan Weimin, E-mail: wangjg@ynao.ac.cn [National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)

    2012-11-20T23:59:59.000Z

    We report the discovery of an unusual, extremely dust-rich and metal-strong damped Ly{alpha} absorption system (DLA) at a redshift z{sub a} = 2.4596 toward the quasar SDSS J115705.52+615521.7 with an emission-line redshift z{sub e} = 2.5125. The quasar spectrum, taken in the Sloan Digital Sky Survey, shows a very red color and a number of metal absorption lines, including C II, Al II, Si II, Fe II, and Zn II, which are confirmed and further characterized by follow-up spectroscopy made with the Multiple Mirror Telescope. Its neutral hydrogen column density N {sub HI} = 10{sup 21.8{+-}0.2} cm{sup -2} is among the highest values measured in quasar DLAs. The measured metal column density is N {sub ZnII} Almost-Equal-To 10{sup 13.8} cm{sup -2}, which is about 1.5 times larger than the largest value in any previously observed quasar DLAs. We derive the extinction curve of the dusty DLA using a new technique, which is an analog of the 'pair method' widely used to measure extinction curves in the Milky Way (MW). The best-fit curve is an MW-like law with a significant broad feature centered around 2175 A in the rest frame of the absorber. The measured extinction A{sub V} Almost-Equal-To 0.92 mag is unprecedentedly high in quasar DLAs. After applying an extinction correction, the i-band absolute magnitude of the quasar is as high as M{sub i} Almost-Equal-To -29.4 mag, placing it as one of the most luminous quasars ever known. The large gas-phase relative abundance of [Zn/Fe] Almost-Equal-To 1.0 indicates that metals are heavily depleted onto dust grains in the absorber. The dust depletion level is between that of the warm and cool clouds in the MW. This discovery is suggestive of the existence of a rare yet important population of dust-rich DLAs with both high metallicities and high column densities, which may have significant impact on the measurement of the cosmic evolution of neutral gas mass density and metallicity.

  13. J U LY 2 014 CULTURAL PRECINCT

    E-Print Network [OSTI]

    Tobar, Michael

    of The University of Western Australia and to the citizens of our State. We welcome the community, prospective, Cultural Precinct The University of Western Australia | 01 FREE FREE FREE FREE FREE FREE FREE TABLE visual form to the developing cross-cultural relationships between South Korea and Western Australia

  14. FuzzySetsandSystems33(1989)201-212 201 No~h-Hol|and

    E-Print Network [OSTI]

    de Campos, Luis M.

    1989-01-01T23:59:59.000Z

    EXPECTATION AND ITS APPL|CA'E[ON TO THE EXTENSION OF FUZZY MEASURES Manuel J. BOLAHOS CARMONA Facul~dde Med

  15. Formalizing a Framework for Dynamic Slicing of Program Dependence Graphs in Isabelle/HOL

    E-Print Network [OSTI]

    Snelting, Gregor

    *i; 6 i := i-1; } 7 out:=sum; CFG: Entry 1 2 3 4 5 6 7 Exit False True sum:=0 prod:=1 i>0 i0 sum sum := sum+i; 5 prod := prod*i; 6 i := i-1; } 7 out:=sum; CFG: Entry 1 2 3 4 5 6Exit 7 False True sum sum := sum+i; 5 prod := prod*i; 6 i := i-1; } 7 out:=sum; CFG: Entry 1 2 3 4 5 6Exit 7 False True sum

  16. Sandia National Laboratories: ionic liquids biological-ly derived...

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

    and NREL Announce Two New H2FIRST Reports New Report Describes Joint Opportunities for Natural Gas and Hydrogen Fuel-Cell Vehicle Markets Sandians Participate in 46th Annual...

  17. J. Camilleri and T. Melham, `Reasoning with Inductively Defined Relations in the HOL Theorem Prover', Technical Report No. 265,

    E-Print Network [OSTI]

    Melham, Tom

    University of Malta University Heights Msida, Malta G.C. Tom Melham University of Cambridge Computer

  18. Available online at www.sciencedirect.com Electrochemical conversion of CO2 to useful chemicals: current

    E-Print Network [OSTI]

    Kenis, Paul J. A.

    -propanol, allyl alco- hol, acetaldehyde, propionaldehyde, acetate, methanol, ethylene glycol, glycolaldehyde

  19. DOI: 10.1002/cctc.201200311 Low-Temperature Chemoselective Gold-Surface-Mediated Hydrogenation of

    E-Print Network [OSTI]

    Henkelman, Graeme

    .[9] Claus found that, in the production of allyl alco- hol from the hydrogenation of acrolein, gold

  20. Reactor Analysis and Process Synthesis for a Class of Complex Sequential Reactions

    E-Print Network [OSTI]

    Maccabi, Omid A

    2012-01-01T23:59:59.000Z

    Design, AIChE, 1995, 52–67 [Hol79] Holland and Anthony, Fundamentals of Chemical Reaction Engineering,

  1. Chemical Enrichment at High Redshifts: Understanding the Nature of Damped Ly$?$ Systems in Hierarchical Models

    E-Print Network [OSTI]

    P. B. Tissera; D. G. Lambas M. B. Mosconi; S. A. Cora

    2001-04-18T23:59:59.000Z

    We use cosmological hydrodynamical simulations including star formation and metal enrichment to study the evolution of the chemical properties of galaxy-like objects at high redshift in the range $0.25Hydrogen column densities with abundances and scatter comparable to those observed in damped Lyman-$\\alpha$ systems (DLAs).The unweighted mean of abundance ratios and least square linear regressions through the simulated DLAs yield intrinsic metallicity evolution for the [Zn/H] and [Fe/H], consistent with results obtained from similar analysis of available observations. Our model statistically reproduces the mild evolution detected in the metallicity of the neutral hydrogen content of the Universe, given by mass-weighted means,if observational constraints are considered (as suggested by Boiss\\'ee et al. 1998). For the $\\alpha$-elements in the simulated DLAs, we find neither enhancement nor dependence on metallicity. Our results support the hypotheses that DLAs trace a variety of galactic objects with different formation histories and that both SNI and SNII are contributing to the chemical enrichment of the gas component at least since $z \\approx 2$. This study indicates that DLAs could be understood as the building blocks that merged to form today normal galaxies within a hierarchical clustering scenario.

  2. Loop Current warming by Hurricane Wilma L.-Y. Oey,1

    E-Print Network [OSTI]

    Ezer, Tal

    /16$26/2005) is the most powerful At- lantic hurricane on record. The storm's minimum surface pressure. On the other hand, less is known about the effects of a hurricane on the powerful Loop Current, where strong] for a review of the Loop Current and general circulation in the Gulf of Mexico). 2. Methodology [4] To analyze

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

    E-Print Network [OSTI]

    Jens Thomas; Hartmut Schulz

    2001-03-18T23:59:59.000Z

    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. P LY M O U T H R a c h e l

    E-Print Network [OSTI]

    Daly, Samantha

    University of Michigan property City of Ann Arbor property University of Michigan road City of Ann Arbor road UNIVERSITY PLANNER'S OFFICE 1.20.12 Bicycling Guide: East Medical Campus Legend Bike parking spaces Covered out for sewer grates, slippery manhole covers, oily pavement, snow and ice. Cross railroad tracks

  5. ly circulating NNRTI-resistant strains in San Francisco pose a great and immediate threat to

    E-Print Network [OSTI]

    Moss, Cynthia

    (1994). 14. W. Lang et al., JAMA 257, 326 (1987). 15. W. Winkelstein Jr. et al., JAMA 257, 321 (1987, Classification and Regression Trees (Chapman & Hall, Boca Raton, FL, 1984). 27. C. Darwin, The Origin of Species

  6. anticoagulant therapy re-ly: Topics by E-print Network

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

    be Indicated in Patients on AnticoagulantAntiplatelet Therapy Following Mild Traumatic Brain Injury University of California eScholarship Repository Summary: head injury and an...

  7. Classification of indefinite hyper-K"ahler symmetric spaces Dmitri V. Alekseevsky 1, Vicente Cort'es 2

    E-Print Network [OSTI]

    Cortés, Vicente

    ) if its holon- omy group Hol(M, g) is a subgroup of the pseudo-unitary group U(p, q) (respecti* *vely

  8. aplikasi panas nuklir: Topics by E-print Network

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

    Claus found that, in the production of allyl alco- hol from the hydrogenation of acrolein, gold. By employing propionaldehyde and acetone as representa- tive probe molecules...

  9. The Modern History of Ethiopia and the Horn of Africa: A Select and Annotated Bibliography. By Harold G. Marcus. Hoover Institution Bibliographical Series, Volume 56, Stanford, California: Hoover Institution Press, 1972.

    E-Print Network [OSTI]

    Amatruda, William T.

    1973-01-01T23:59:59.000Z

    The Model'YI History of Ethiopia and the Hol'YI of Africa: Athe extensive activi- ties in Ethiopia since the 1860s of

  10. UNIVERSITY VIEW GLENN L. MARTIN HALL

    E-Print Network [OSTI]

    Setiawan, Hendra

    PRESIDENTIAL DRIVE CHAPEL LANE ROSSBOROUGH LANE GREENHOUSEDRIVE SERVICE LANE YALEAVE COLLEGE AVE PREINKERTDRIVE other parking lots are for use by PERMIT HOL

  11. 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

  12. Chemical Enrichment at High Redshifts Understanding the Nature of Damped Ly$\\alpha$ Systems in Hierarchical Models

    E-Print Network [OSTI]

    Tissera, P B; Cora, S A

    2001-01-01T23:59:59.000Z

    We use cosmological hydrodynamical simulations including star formation and metal enrichment to study the evolution of the chemical properties of galaxy-like objects at high redshift in the range $0.25Hydrogen column densities with abundances and scatter comparable to those observed in damped Lyman-$\\alpha$ systems (DLAs).The unweighted mean of abundance ratios and least square linear regressions through the simulated DLAs yield intrinsic metallicity evolution for the [Zn/H] and [Fe/H], consistent with results obtained from similar analysis of available observations. Our model statistically reproduces the mild evolution detected in the metallicity of the neutral hydrogen content of the Universe, given by mass-weighted means,if observational constraints are considered (as suggested by Boiss\\'ee et al. 1998). For the $\\alpha$-elements in the simulated DLAs, we find n...

  13. Observed and predicted Ly-alpha and UV lines for a sample of galaxies at redshifts z<3.7

    E-Print Network [OSTI]

    Contini, M

    2015-01-01T23:59:59.000Z

    We explore the origin of the observed Lya and other UV lines from galaxies at z1000 km/s) component of the emitting gas is accompanied by relatively low preshock densities (n0 ~100-400 cm^-3) leading in some cases to broad forbidden lines. Some spectra are best reproduced by shock dominated models in which the photoionizing source is hidden or absent. Within more than 50 galaxies modelled in this work, only a few spectra from galaxies at z~2.5 correspond to a starburst temperature Ts>10^5 K, similar to that found in galaxies showing some activity.

  14. j u ly 2 0 0 9 i n a u g u r a t i o n

    E-Print Network [OSTI]

    telescope in Europe for which, due to its size, a monolithic mirror was rejected in favour of a segmented for discovering planets similar to our own in other star systems. Once fitted with its adaptive optics system

  15. apoa-i increases macrophage: Topics by E-print Network

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

    of LY in the extracellular medium. Macrophages incubated in PMA and LY for 2 h accumulated four to six times more LY than did macrophages in LY alone. If after...

  16. .',~'.",'. .& ;yf? :, $ .: , -, : : g.. .:.

    E-Print Network [OSTI]

    Huang, Jianyu

    , Bosnia, Darfur, and,Sudan. As an artist, Ly stron ly kbelieves that art can p ay an important role

  17. Fast Algorithm for Registration of Free-Form Curves and Surfaces Llohamwl N. Allmecl, %r,rneh L1. Yamany, and .\\ly 11. Farag

    E-Print Network [OSTI]

    Farag, Aly A.

    . IX'~ROIIK(:'IIION The registration prorwss is an integral part of com- puter MN1robot, vision systems of frwclmn in the direction of each axis. The ot.twr degree of freedom is the rwult of scaling. There arx

  18. A NA LY S I S 950 VOLUME 18 NUMBER 8 AUGUST 2011 NAture StructurAL & moLecuLAr bIoLogY

    E-Print Network [OSTI]

    (Fig. 1b), which is altered primarily in acute lymphoblastic leukemia2,31. In some cases, the SCNAs may

  19. Supporting Information for Ly, Krout, Pham, Tani, Stoltz, and Julian S1 Synthesis of 2-Quinuclidonium by Eliminating Water: Experimental Quantification

    E-Print Network [OSTI]

    Stoltz, Brian M.

    purchased from Cambridge Isotope Laboratories. Lithium aluminum deuteride (98 atom% d) was purchased from

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

    E-Print Network [OSTI]

    Smith, Jamie Brooke

    2006-08-16T23:59:59.000Z

    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 ...

  1. Silver/polystyrene-coated hollow glass waveguides for the transmission of terahertz radiation

    E-Print Network [OSTI]

    earlier work in- volved the deposition of Ag or Cu coatings inside polycarbonate tubing to form THz-coated hol- low polycarbonate waveguide. To reduce the loss, it is necessary to deposit a dielectric coating

  2. Formal Specification of Operating System Operations

    E-Print Network [OSTI]

    Black, Paul E.

    and Engineering Florida Atlantic University Boca Raton, FL 33431 dan@cse.fau.edu Paul E. Black National Institute system se­ curity policies in the higher­order logic theorem prover, HOL98 [Gordon (1987)]. Formal spec

  3. HAAD: A Quick Algorithm for Accurate Prediction of Hydrogen Atoms in Protein Structures

    E-Print Network [OSTI]

    Li, Yunqi; Roy, Ambrish; Zhang, Yang

    2009-08-20T23:59:59.000Z

    . Acknowledgments The authors are grateful to Dr. Andras Szilagyi for reading through the manuscript. Author Contributions Conceived and designed the experiments: LY ZY. Performed the experiments: LY RA. Analyzed the data: LY RA. Contributed reagents/ materials...

  4. 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

  5. A F F Y M E T R I X P R O D U C T FA M I LY > R N A A R R AYS A N D R E A G E N T S >

    E-Print Network [OSTI]

    Richardson, David

    the amount of globin mRNA from PAXgene total RNA in order to improve the data quality on GeneChip arrays of whole blood total RNA samples on GeneChip® expression arrays has shown reduced detection sensitivity reduce the 1-, 2-, and - globin mRNA population in whole blood total RNA samples prior to target labeling

  6. 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

  7. Limited Chemotherapy and Shrinking Field Radiotherapy for Osteolymphoma (Primary Bone Lymphoma): Results From the Trans-Tasman Radiation Oncology Group 99.04 and Australasian Leukaemia and Lymphoma Group LY02 Prospective Trial;Bone; Lymphoma; Radiotherapy; Chemotherapy; Clinical trial

    SciTech Connect (OSTI)

    Christie, David, E-mail: david.christie@premion.com.au [Premion and Bond University, Gold Coast, Queensland (Australia); Dear, Keith [Department of Epidemiology and Population Studies, Australian National University, Canberra, New South Wales (Australia); Le, Thai [BHB, Premion, Brisbane, Queensland (Australia); Barton, Michael [Collaboration for Cancer Outcomes and Research (CCORE) and University of NSW, Sydney, New South Wales (Australia); Wirth, Andrew [Peter MacCallum Cancer Institute, Melbourne, Victoria (Australia); Porter, David [Auckland Hospital, Auckland (New Zealand); Roos, Daniel [Royal Adelaide Hospital, Adelaide, South Australia (Australia); Pratt, Gary [Royal Brisbane Hospital, Brisbane, Queensland (Australia)

    2011-07-15T23:59:59.000Z

    Purpose: To establish benchmark outcomes for combined modality treatment to be used in future prospective studies of osteolymphoma (primary bone lymphoma). Methods and Materials: In 1999, the Trans-Tasman Radiation Oncology Group (TROG) invited the Australasian Leukemia and Lymphoma Group (ALLG) to collaborate on a prospective study of limited chemotherapy and radiotherapy for osteolymphoma. The treatment was designed to maintain efficacy but limit the risk of subsequent pathological fractures. Patient assessment included both functional imaging and isotope bone scanning. Treatment included three cycles of CHOP chemotherapy and radiation to a dose of 45 Gy in 25 fractions using a shrinking field technique. Results: The trial closed because of slow accrual after 33 patients had been entered. Accrual was noted to slow down after Rituximab became readily available in Australia. After a median follow-up of 4.3 years, the five-year overall survival and local control rates are estimated at 90% and 72% respectively. Three patients had fractures at presentation that persisted after treatment, one with recurrent lymphoma. Conclusions: Relatively high rates of survival were achieved but the number of local failures suggests that the dose of radiotherapy should remain higher than it is for other types of lymphoma. Disability after treatment due to pathological fracture was not seen.

  8. Tuesday, July 19, 2011 New England

    E-Print Network [OSTI]

    Nightingale, Peter

    ! Let's get ENERGY from wind and sun and stars, Ride more bicycles and drive electric cars, Let. Car- bon we belch, in heat we squelch, gnar- ly goo, Car- bon we belch, in heat we squelch, gnar- ly

  9. An analytically solvable, axially non-homogeneous reactor model

    E-Print Network [OSTI]

    Pázsit, Imre

    and Glasstone,1970) and analytically in 1-D noise problems (Kosa ly et al., 1977). The general conclusion

  10. Reprint Series 18 December 1981, Volume 214, pp. 13.59-1361 SCIE E

    E-Print Network [OSTI]

    with wind generated from wing vibration (Fig 1) The female immediate- ly walks toward the source of the odor

  11. Submission 04 Nov 2004 Space perception for tele-operation tasks 1/7 Space perception for tele-operation tasks

    E-Print Network [OSTI]

    and representation easier for the operator is to give him natural feedback information about the environment operator is far from the area where the action takes place. Operator Barrier (Environment,distance, time of automatic modes by the operator ([VAN94]). The notion of joint cognitive systems, introduced in [HOL83

  12. Univerzita Karlova v Praze Zpis ze 3. zasedn vdeck rady Matematicko-fyzikln fakulty

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    . Jií Neustupa, CSc. prof. RNDr. Jan Palous, DrSc., OMLUVENI clenové vdecké rady: prof. RNDr. V. Holý, pracovala v následujícím slození: pedseda ­ prof. RNDr. Jan Palous, DrSc., (

  13. Linkping studies in science and technology. Thesis. Pose Estimation and Calibration Algorithms

    E-Print Network [OSTI]

    Schön, Thomas

    http://www.control.isy.liu.se hol@isy.liu.se Linköping 2008 #12;This is a Swedish Licentiate's Thesis. Swedish postgraduate education leads to a Doctor's degree and/or a Licentiate's degree. A Doctor's Degree comprises 240 ECTS credits (4 years of full-time studies). A Licentiate's degree comprises 120 ECTS credits

  14. [1] J. H. Ahrens. Paving the chessboard. Journal of Combinatorial Theory, Series A, 31:277--288, 1981.

    E-Print Network [OSTI]

    Merlini, Donatella

    . Petreschi. LEONARDO: a soft­ ware visualization system. Proceedings of the 1­st Workshop on Algorithm¨utzenberger methodology and solving for A; we get the following gener­ ating function: Hol(t; w) = wt 2 (2 + t + 2w 2 t 2

  15. Calibration of a magnetometer in combination with inertial sensors

    E-Print Network [OSTI]

    Schön, Thomas

    Calibration of a magnetometer in combination with inertial sensors Manon Kok, Jeroen D. Hol, Thomas are aligned and that the magnetometer is properly calibrated for both sensor errors as well as presence of magnetic distortions. In this work we derive an easy-to-use calibration algorithm that can be used

  16. Combining treatment for written and spoken naming PLAGIE M. BEESON and HEATHER EGNOR

    E-Print Network [OSTI]

    there is some residual phonological ability and the treatment serves to stimulate links between orthography., 2001). Behavioral treatments also may stimulate interactive use of residual knowledge across seman- tic production (Bruce & Howard, 1987; Hol- land, 1998). In a series of writing treatment studies directed toward

  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. 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.

    of Neural Networks to Fuel Processors for Fuel-Cell Vehicles Laura C. Iwan and Robert F. Stengel, Fellow, IEEE Abstract--Passenger vehicles fueled by hydrocarbons or alco- hols and powered by proton exchange membrane (PEM) fuel cells address world air quality and fuel supply concerns while avoiding hydrogen

  19. Printed on: Thu, Oct 19, 1995 12:54:25 Document: iee_bm_synth

    E-Print Network [OSTI]

    Newcastle upon Tyne, University of

    Laboratory University of Newcastle upon Tyne NE1 7RU United Kingdom F.P. BURNS D.J. KINNIMENT Department interactive design tool that integrates the Boyer Moore theorem prover into the design process. We describe shown great promise in the area of hardware design: HOL [Go87] and the Boyer Moore theorem prover [Bo88

  20. REVIEW SHEET 5 (1) In the phase portrait of the system x = (?1 ?2 3 ...

    E-Print Network [OSTI]

    2013-12-08T23:59:59.000Z

    Solution. Apply Laplace transformation on both sides of the equation: L[2y ? 5y + 3y]=2y ? 5y + 3y = ?(t ? 1)[?(t ? 1)]. ? 2L[y ] ? 5L[y ]+3L[y] = e?s. ? (2s2 ? 5s + ...

  1. Inhibition of Trichoderma reesei cellulase by cellobiose, glucose, ethanol and butanol

    E-Print Network [OSTI]

    Cognata, Mona Beth

    1988-01-01T23:59:59.000Z

    INHIBITION OF TRICHODERMA REESEI CELLULASE BY CELLOBIOSE, GLUCOSE, ETHANOL AND BUTANOL A Thesis by MONA BETH COGNATA Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE December 1988 Major Subject: Chemical Engineering INHIBITION OF TRICHODERMA REESEI CELLULASE BY CELLOBIOSE, GLUCOSE, ETHANOL AND BUTANOL A Thesis by MONA BETH COGNATA Approved as to style and content by: Mark T. Hol a (Chair...

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

    E-Print Network [OSTI]

    Constable, Steve

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

  3. Friday, March 12, 2010 "The Age of Stupid"

    E-Print Network [OSTI]

    Nightingale, Peter

    need had get B 7 O- Ne- He Lift Still B E ver flushed us he P ly his the some Al more melt, way, boob

  4. 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)

  5. Science Headlines | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    in Washington, D.C., later this year. Oregon State Spinoff Aims to Improve Residential Solar Panel Affordability http:bit.ly1Be9BDU mediaimagesuniversities...

  6. 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

  7. 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

  8. Controlling X-rays With Light

    E-Print Network [OSTI]

    Glover, Ernie

    2010-01-01T23:59:59.000Z

    Author Contributions TEG, MPH, AB, SHS, LY contributed todesign of the experiment. TEG, MPH, BR were responsible forcontrol laser performance. TEG, MPH, SHS, TKA, JVT, EPK, BK,

  9. 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

  10. Pantex | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    content Social Media Pantex Pantex RT @PantexPlant: Pantex becomes @NWSAmarillo ambassador for severe weather preparedness http:ow.lyB6BX5...

  11. PROCEEDINGS OF WORKSHOP ON THERMOMECHANICAL-HYDROCHEMICAL MODELING FOR A HARDROCK WASTE REPOSITORY. JULY 29-31, 1980. MARRIOTT INN, BERKELEY, CA

    E-Print Network [OSTI]

    Authors, Various

    2010-01-01T23:59:59.000Z

    of measurements of rock properties. This is the essence ofthe description of rock properties. Conserluent- ly, reneweduse of improved input on rock properties, and enhanced code

  12. The editors of Current Biology welcome correspondence on

    E-Print Network [OSTI]

    Keeling, Patrick

    , 724­734. 5. Pouthas, F., Girard, P., Lecaudey, V., Ly, T.B.N., Gilmour, D., Boulin, C., Pepperkok, R

  13. A Q UA R T E R LY U P D AT E O F AVA I L A B L E T E C H N O LO G I E S F O R I N D U S T R Y INNOVATION MARKETPLACE

    E-Print Network [OSTI]

    's Microsystems Enabled Photovoltaics (MEPV): Solar GlitterTM technology on page 7. (Photo by Randy Montoya Microsystems, Engineering & Manufacturing · Wireless Passive Radiation Sensor · Nitride Growth and Liftoff

  14. 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.

    Acclimation of Russian forests to recent changes in climate A N D R E I L A P E N I S *, A N AT O of the Russian forest. Keywords: acclimation, carbon, climate change, forest Received 28 March 2005; and accepted Mytishi, Moscow District, Russia Abstract Assessments made over the past few decades have suggested

  15. Lay summary This contribution from the New Zealand Institute of Gene Ecology (NZIGE) is meant to

    E-Print Network [OSTI]

    Hickman, Mark

    in Australia and New Zealand. "Corn line LY038 has been genetically modified to have higher than usual levels to support Food Standards Australia/New Zealand's preparation of a Draft Assessment on application A549. Our the Australia New Zealand Food Standards Code to allow foods derived from corn line LY038 to be sold

  16. The kernel of Dirac operators on S 3 and R 3 Laszlo Erdos #

    E-Print Network [OSTI]

    of Loss and Yau [LY]. AMS 1991 Subject Classification: 53A50, 57R15, 58G10, 81Q05, 81Q10 Running title Natural Science Research Council 1 #12; 1 Introduction In [LY] Loss and Yau proved the existence unless there is an upper bound on the fine structure constant. Loss and Yau gave a very explicit

  17. On the Diffuse Lyman-alpha Halo Around Lyman-alpha Emitting Galaxies

    E-Print Network [OSTI]

    Lake, Ethan; Cen, Renyue; Sadoun, Raphael; Momose, Rieko; Ouchi, Masami

    2015-01-01T23:59:59.000Z

    Ly$\\alpha$ photons scattered by neutral hydrogen atoms in the circumgalactic media or produced in the halos of star-forming galaxies are expected to lead to extended Ly$\\alpha$ emission around galaxies. Such low surface brightness Ly$\\alpha$ halos (LAHs) have been detected by stacking Ly$\\alpha$ images of high-redshift star-forming galaxies. We study the origin of LAHs by performing radiative transfer modeling of nine $z=3.1$ Lyman-Alpha Emitters (LAEs) in a high resolution hydrodynamic galaxy formation simulation. We develop a method of computing the mean Ly$\\alpha$ surface brightness profile of each LAE by effectively integrating over many different observing directions. Without adjusting any parameters, our model yields an average Ly$\\alpha$ surface brightness profile in remarkable agreement with observations. We find that observed LAHs can not be accounted for solely by photons originating from the central LAE and scattered to large radii by hydrogen atoms in the circumgalactic gas. Instead, Ly$\\alpha$ em...

  18. Evidence for PopIII-like stellar populations in the most luminous Lyman-$\\alpha$ emitters at the epoch of re-ionisation: spectroscopic confirmation

    E-Print Network [OSTI]

    Sobral, David; Darvish, Behnam; Schaerer, Daniel; Mobasher, Bahram; Röttgering, Huub; Santos, Sérgio; Hemmati, Shoubaneh

    2015-01-01T23:59:59.000Z

    Faint Lyman-$\\alpha$ (Ly$\\alpha$) emitters become increasingly rarer towards the re-ionisation epoch (z~6-7). However, observations from a very large (~5deg$^2$) Ly$\\alpha$ survey at z=6.6 (Matthee et al. 2015) show that this is not the case for the most luminous emitters. Here we present follow-up observations of the two most luminous z~6.6 Ly$\\alpha$ candidates in the COSMOS field: `MASOSA' and `CR7'. We used X-SHOOTER, SINFONI and FORS2 (VLT), and DEIMOS (Keck), to confirm both candidates beyond any doubt. We find redshifts of z=6.541 and z=6.604 for MASOSA and CR7, respectively. MASOSA has a strong detection in Ly$\\alpha$ with a line width of $386\\pm30$ km/s (FWHM) and with high EW$_0$ (>200 \\AA), but it is undetected in the continuum. CR7, with an observed Ly$\\alpha$ luminosity of $10^{43.93\\pm0.05}$erg/s is the most luminous Ly$\\alpha$ emitter ever found at z>6. CR7 reveals a narrow Ly$\\alpha$ line with $266\\pm15$ km/s FWHM, being detected in the NIR (rest-frame UV, with $\\beta=-2.3\\pm0.1$) with an exce...

  19. Electrical Energy Conservation and Peak Demand Reduction Potential for Buildings in Texas: Preliminary Results

    E-Print Network [OSTI]

    Hunn, B. D.; Baughman, M. L.; Silver, S. C.; Rosenfeld, A. H.; Akbari, H.

    1985-01-01T23:59:59.000Z

    Zone 2 (Fort Worth) only SWPLY CURE LEGEND BASE COYSWIPIIOYI 15885 KYH IAll-rlecl I9414 KHI 16rc hat) BASE PEAK: 5.3 KY Srvlnqr are crlculrted lrol ClRA runs EN0 USE UITEBORY: Hert~nq md hol~nq COST 10 LIFE SRVIN6S CCE lR1TROFITl... -- for All Single and Multifamily Residences, All Climate Zones SUPPLY CURVE LEGEND EASE COYSUIPIIDH: See notes belor LhD USE CATEGORY: Relrlqerrtors COST Ill LIFE WlVlN6S --------- ----- ------------ LABEL DESCRIPIIOY HEY RE1 IVRSl KlH KY Relr...

  20. Pollution error in the h-version of the finite-element method and the local quality of a-posteriori error estimators

    E-Print Network [OSTI]

    Mathur, Anuj

    1994-01-01T23:59:59.000Z

    in the L-shaped domain shown in Figs. la-ld. We applied boundary condi- 1 tions consistent with the singular solution u(r, 8) = rr sin(-) in the infinite wedge (see also Chapter II) and we assumed that we are interested only in the solution in the hol...-element solution in the subdomain. In Fig. l. la we show an adaptive finite-element mesh which was gener- ated using remeshing and linear elements, over the L-shaped domain fl. For this mesh an accuracy of 1. 09% for the relative error in the energy-norm over...

  1. Private trucking costs and records

    E-Print Network [OSTI]

    Haning, Charles R

    1959-01-01T23:59:59.000Z

    Ccaystieoa of Ls?sl L?hot Rsyoa?s to See-L?hot Rsyoaeo Coot-hHOL? daslyoio xoc?L Disco coot y?~LLL? kaalyoi? lstseoitg Cost-y?~LL? daelgeio LeeaL Co?C~LNLL? ka?LXaie C?eyeeieoa Roteess Looal sad 1atcmoitg %la-Lstcac Coot-SeHNlo 9 9 Ll LX 14 19 Xi... s aired fleet of trucks was 29 seats psr nile. Of this figure& 14 cents was attributable co tho driver expenses whish included ths wages of tha drivers and helpers. Thoro wes epproxinacaly a 51 cent difference becwesa the per nile costs fot...

  2. Bulletin of Tibetology: Volume 30, Number 2 : Full issue

    E-Print Network [OSTI]

    Namgyal Institute of Tibetology

    1994-07-12T23:59:59.000Z

    consistent with the ritualistic disciplines. He composed many philosophical works on Buddhism for the preservation and continuity of doctrines till posterity, besides holding both the spiritual and temporal power over Tibet(Chos-srid gnyis -ldan... -po. Autobiography ofVth Dalai Lama. Vol. V. 730 Folio. Dkar-chag (Index) Za-hol' !"'Yi ban-de ngag-dbang blo-bzang l'gya-mtaho'i 'di-:mang 'khrul-pa'i rol-rtsed rto!,,'S-bljod kyi tshul-du bkod-pa du-ku-Ia'i gos-bzang las glegs-bam gnyis-pa. Autobiography of...

  3. The late Victorian and Edwardian intellectual influence on the Wolfenden Report of 1957

    E-Print Network [OSTI]

    McIntosh, Craig Lee

    1972-01-01T23:59:59.000Z

    in 1903 in an obscure literary Journal, Zhe ~Tem le mr. In it r'or ster dealt w1th the rel?tionship between two young friends, Tommy and Ha old, The story opened with a letter from Harold, who was at the time Ln i'Japles, which begged Tommy, a... student at one of the universities, to come with h1m and his f1*ncee and her family for a hol1day in Sicily. Tommy did not go. Harold suddenly lost his mind in the ruins of an old Greek city, a city 1n wnich Harold decided that he had lived before...

  4. 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

    1977-01-01T23:59:59.000Z

    '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...

  5. 3 5 4 A A N A LY T I C A L C H E M I S T R Y / S E P T E M B E R 1 , 2 0 0 5 2 0 0 5 A M E R I C A N C H E M I C A L S O C I E T Y DotsLeave the Light On

    E-Print Network [OSTI]

    Nielsen, Steven O.

    researchers to create entire libraries of probes based on one parent structure. For example, the most commonly with the same synthesis protocols. Small Cd/Se dots emit blue light, whereas larger ones can emit green, yellow green fluorescent protein. One of the most striking advantages of QDs is that all of the colors can

  6. Mining for Metals in the Lyman Alpha Forest

    E-Print Network [OSTI]

    Sara L. Ellison; Antoinette Songaila; Joop Schaye; Max Pettini

    2000-02-14T23:59:59.000Z

    In order to ascertain the extent of metal enrichment in the Ly alpha forest, we have analysed a very high S/N spectrum of the z = 3.625 QSO Q1422+231. We find that in high column density Ly alpha clouds, the power law column density distribution function of C IV continues down to log N(C IV) = 11.7. In addition, by analysing pixel-by-pixel optical depths we show that there are considerably more metals in the Ly alpha forest than are currently directly detectable.

  7. Refiguring the sketch : the Nari Gandhi cartographic

    E-Print Network [OSTI]

    Jalia, Aftab Amirali

    2008-01-01T23:59:59.000Z

    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. 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

  9. Analysis of International Policies In The Solar Electricity Sector: Lessons for India

    E-Print Network [OSTI]

    Deshmukh, Ranjit

    2011-01-01T23:59:59.000Z

    S. and Yuan, L.Y. (2007), “China’s Solar Energy Industry:the examples of China and Taiwan that Solar PV saw a largetariffs Figure 7: China’s annual solar PV installation and

  10. Social Media | Argonne National Laboratory

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

    View this on Twitter @argonne 6 days ago In case U missed it: @JCESRHub pushes 3D printing to the nanoscale - http:bit.ly1yRymcZ http:t.coAuwgHMdhtF 10 retweets View...

  11. A radio-tracking study of home range, movements, and habitat uses of the fox squirrel (Sciurus niger) in East Texas

    E-Print Network [OSTI]

    Geeslin, Herbert Glyn

    1970-01-01T23:59:59.000Z

    - briar (Smilax bona-nox), hawthorn (Crataegus spp. ), and increased amounts of hollies (Ilex spp. ). This are- was rather low ly. ng and contained two temporary drainage streams. Standing water existed for 1 or 2 days following moderate to heavy...

  12. Flood or Drought: How Do Aerosols Affect Precipitation?

    E-Print Network [OSTI]

    Daniel, Rosenfeld

    by scattering and absorbing the solar radiation that energizes the formation of clouds (3­5). Because all cloud on clouds most- ly act to suppress precipitation, because they de- crease the amount of solar radiation

  13. A discussion of sanitary engineering problems in army camps in the United States in relation to water supply, sewerage, and garbage problems from the standpoint of the medical department

    E-Print Network [OSTI]

    Haskins, Charles Arthur

    1920-01-01T23:59:59.000Z

    will consult free­ ly with the engineer officer and the officer in charge of cantonment construction, in connection with the purchases of such equipment as power plants, pumping machinery, refrigerating plants and similar items. .;.. "6. COLSTRUCTION...

  14. DOI: 10.1126/science.1141134 , 1631 (2008);319Science

    E-Print Network [OSTI]

    Sparks, Donald L.

    2008-01-01T23:59:59.000Z

    , to differences in surface and near-surface atomic structure, as well as crystal shape and surface topography transformation, and surface-to-volume ratios change dramatical- ly. Such particles are minerals that are as small

  15. Camel Creek Minnamoolka

    E-Print Network [OSTI]

    Greenslade, Diana

    Creek Tr ebonne California Ly nd Hellhole Pac ksad dle Little Star River Ella M ic hael Davidson M eunga Echo Mid dle Leich hardt Blund er NobCreek Stony Barron Martin Deception Paddys Creek Broken River

  16. 1. Introduction Fuzzy sets have been around for nearly

    E-Print Network [OSTI]

    Mendle, Jerry M.

    , a type-1 FS has limited capabilities to direct- ly handle such uncertainties, where by han- dle I mean kind of methodology one uses to han- dle it. One of the best sources for general discussions about

  17. Peanut Profits and Irrigation Yield Response in the Northern Texas High Plains, A Non-Traditional Production Area.

    E-Print Network [OSTI]

    Harman, Wyatte L.; Regier, C.; Petr, F.; Lansford, V.D.

    1990-01-01T23:59:59.000Z

    Wyatte L. Harman, C. Regier, F. Petr and V.D. Lansford* ;; * Respectiv~ly, agricultural economist, research scientist-in-charge, Texas Agricultural Experiment Station, Amarillo, Texas; Emeritus extension agronomist, Texas Agricultural Extension Service...

  18. Oral health education for pediatric nurse practitioner students

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    ly Submitted manuscript - not for distribution Douglass JM,Submitted manuscript - not for distribution Minah G, Lin C,manuscript - not for distribution 1:S38-43. Caspary G, Krol

  19. HARNESS FOR ATTACHMENT OF AN ULTRASONIC TRANSMITTER TO

    E-Print Network [OSTI]

    to the time of use such that in the field the only modifications required are the addition or removal of small., by hook and line and maintained in captivity for approximate- ly 2 mo prior to testing. Results

  20. ENVIRONMENTAL REVIEW for CATEGORICAL EXCLUSION I>ETERMINATION

    Broader source: Energy.gov (indexed) [DOE]

    on ly as needed. for access road maintenance andor to levellhe landing areas. B. Number and Title of the Categorical Exclusion Being Applied: (See lext in 10 eFR Part...

  1. alpha 1-antitrypsin deficiency: Topics by E-print Network

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

    Sparenberg, J M 2004-01-01 26 Dynamic Ly alpha jets Astrophysics (arXiv) Summary: The solar chromosphere and transition region are highly structured and complex regimes. A recent...

  2. 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

  3. UNITED STATES: NOAA Head Vows to Protect Marine Re-

    E-Print Network [OSTI]

    , Cameron, La., in Volume Washington-Oregon Salmon Pack Rose Sharp- ly 1971 Gulf Menhaden Catch Sets Record Japanese Mothership Salmon Fishery Means Research for NMFS Gravel System Holds Promise for Salmon Fry

  4. allergic skin disease: Topics by E-print Network

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

    of the microbiome...The Skin Microbiome in Healthy and Allergic Dogs Aline Rodrigues Hoffmann1*, Adam P. Patterson2, Alison Diesel2, Sara D. Lawhon4, Hoai Jaclyn Ly1, Christine...

  5. allergic skin diseases: Topics by E-print Network

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

    of the microbiome...The Skin Microbiome in Healthy and Allergic Dogs Aline Rodrigues Hoffmann1*, Adam P. Patterson2, Alison Diesel2, Sara D. Lawhon4, Hoai Jaclyn Ly1, Christine...

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

    E-Print Network [OSTI]

    Sears, Brad

    2009-01-01T23:59:59.000Z

    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

  7. A Science_Jervice. Feature Released upon receipt

    E-Print Network [OSTI]

    aay lake or river 'ice, W~Uraj[) ice being brought in from Dekota. gcating parties on lakes o r streams were .extreme-. ly rare and artificial i o e rink parties were more numerous than usual, fiozen

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

    E-Print Network [OSTI]

    Meyer, Michael August

    1981-01-01T23:59:59.000Z

    , 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...

  9. Gallaudet University Spring 2015 Career Fair

    Broader source: Energy.gov [DOE]

    Gallaudet University, Field House Gymnasium, 800 Florida Avenue NE, Washington, DC 20002 Contact: DOECorporateRecruitment@hq.doe.govhttp://bit.ly/1vjfWjFThis event was rescheduled due to inclement...

  10. Parental verbal abuse and the mediating role of self-criticism in adult internalizing disorders

    E-Print Network [OSTI]

    Sachs-Ericsson, N.; Verona, E.; Joiner, T.; Preacher, K. J.

    2006-01-01T23:59:59.000Z

    Background: Researchers (e.g., [Gibb, B.E., 2002. Childhood maltreatment and negative cognitive styles. A quantitative and qualitative review. Clinical Psychology Review, 22 (2), 223–246]; [Rose, D.T., Abramson, L.Y., 1992. ...

  11. Estuaries Vol. 21, No. 2, p. 291-293 June 1998 Multiple T-S States for Estuaries, Shelves, and Marginal Seas

    E-Print Network [OSTI]

    Olver, Peter

    Estuaries Vol. 21, No. 2, p. 291-293 June 1998 Multiple T-S States for Estuaries, Shelves continental shelves ranges between O%Oand the ocean value of approximate- ly 35%0. Thus, worldwide

  12. Physiological aspects of seed conservation Institute of Dendrology, 62-035 K6rnik, Poland

    E-Print Network [OSTI]

    Boyer, Edmond

    Physiological aspects of seed conservation B. Suszka Institute of Dendrology, 62-035 K6rnik, Poland and initiating germination, main- ly mobilization of reserves and energy metabolism. Results of studies

  13. LOCAL COHOMOLOGY AND PURE MORPHISMS 1. Introduction ...

    E-Print Network [OSTI]

    square-free monomials m1,...,mr, set a[t] = (mt. 1,...,mt. r) for integers t ? 0. Lyubeznik [Ly1, Theorem 1 (i)] proved that the natural maps. Exti. R(R/a[t],R) ?? Hi.

  14. 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

  15. ENVIRONME NTA L R EV

    Broader source: Energy.gov (indexed) [DOE]

    above a sole-source aquifer or upland surface soil removal on a site that has wetlands). Environmental ly sensitive resources include. but are nO( limited to: (i) Property (such...

  16. alpha phase dipalmitoylphosphatidylcholine: Topics by E-print...

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

    Lyman Alpha Radiative Transfer in a Multi-Phase Medium Astrophysics (arXiv) Summary: Hydrogen Ly-alpha is our primary emission-line window into high redshift galaxies....

  17. Khesbn no. 148 - Autumn 2006 - Journal

    E-Print Network [OSTI]

    Admin, LAYCC

    2006-01-01T23:59:59.000Z

    l'N - ! t u'lyDuly - l"l - prb: r'D osil iy .ultyyuyt y)y)D|-ruyr ,ob'tyr ltN lrYlDyl .prb p': ly:yr "ry "l'rN )"rr ,u$;r lupJyb )ryr l:")7 g Prb: .y'r''ny)yu "1 !? Nil 9"ry"r

  18. 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 where l : W R is a convex loss function so that f(w) is a -strongly convex function where = 1 C

  19. Surface Stresses and Turbulent Fluxes: Problems in Mesoscale Modeling over Terrain

    E-Print Network [OSTI]

    : Turbulent mixing in breaking waves (Epifanio and Qian, 2008) LES for breaking mountain wave Flow past a hill) = Dx Ly (u, v, w) = Dy One kinematic condition (no flow through the boundary): w = u h x + v h y at the boundary and combine with the kinematic condition Lx ui,j,0 vi,j,0 wi,j,0 = f (Dx i,j , interior) , Ly

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

    E-Print Network [OSTI]

    Milligan, Ryan O

    2015-01-01T23:59:59.000Z

    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...

  1. 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, E-mail: r-matsunuma@nifty.com [Department of Surgery, Breast Oncology Center, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo (Japan); First Department of Surgery, Hamamatsu University School of Medicine, Shizuoka (Japan); Oguchi, Masahiko [Radiation Oncology Department, Breast Oncology Center, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo (Japan); Fujikane, Tomoko [Department of Surgery, Breast Oncology Center, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo (Japan); Matsuura, Masaaki [Bioinformatics Group, Genome Center of the Japanese Foundation for Cancer Research and Division of Cancer Genomics, Cancer Institute of the Japanese Foundation for Cancer Research, Tokyo (Japan); Sakai, Takehiko; Kimura, Kiyomi; Morizono, Hidetomo; Iijima, Kotaro; Izumori, Ayumi; Miyagi, Yumi; Nishimura, Seiichiro; Makita, Masujiro [Department of Surgery, Breast Oncology Center, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo (Japan); Gomi, Naoya [Department of Diagnostic Imaging, Breast Oncology Center, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo (Japan); Horii, Rie [Division of Pathology, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo (Japan); Akiyama, Futoshi [Division of Pathology, Cancer Institute of the Japanese Foundation for Cancer Research, Tokyo (Japan); Iwase, Takuji [Department of Surgery, Breast Oncology Center, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo (Japan)

    2012-07-01T23:59:59.000Z

    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.

  2. Life of His Holiness the Vth Dalai Lama, Ngag-dbang blo-bzang rgya-mtsho (1617-1682 A.D.)

    E-Print Network [OSTI]

    Gyatso, Acharya Samten

    1994-01-01T23:59:59.000Z

    power over Tibet(Chos-srid gnyis -ldan). In the Water-Dog year corresponding to 1682 A.D at the age of sixty six, he departed from the world of mortal existence, to rest peacefully in the abode of purity. WORKS OFVTHDAUU LAMA NGAG-DBANG BLO BZANG... -pa du-ku-Ia'i gos-bzang las glegs-bam dang-po. Autobiography ofVth Dalai Lama. Vol. V. 730 Folio. Dkar-chag (Index) Za-hol' !"'Yi ban-de ngag-dbang blo-bzang l'gya-mtaho'i 'di-:mang 'khrul-pa'i rol-rtsed rto!,,'S-bljod kyi tshul-du bkod-pa du...

  3. The evolution of superbubbles and the detection of Lyman alpha in star-forming galaxies

    E-Print Network [OSTI]

    Guillermo Tenorio-Tagle; Sergey A. Silich; Daniel Kunth; Elena Terlevich; Roberto Terlevich

    1999-05-25T23:59:59.000Z

    The detection of Ly alpha emission in star-forming galaxies in different shapes and intensities (always smaller than predicted for case B recombination) has puzzled the astronomical community for more than a decade. Here we use two dimensional calculations to follow the evolution of superbubbles and of the H II regions generated by the output of UV photons from massive stars. We show the impact caused by massive star formation in the ISM of different galaxies and we look at the conditions required to detect Ly alpha emission from a nuclear H II region, and the variety of profiles that may be expected as a function of time.

  4. Middle to late Preceramic (6000-3000 BP) subsistence patterns on the central coast of Peru: the coprolite evidence

    E-Print Network [OSTI]

    Jones, John Glendon

    1988-01-01T23:59:59.000Z

    for macrofossil content. These samples dated from middle to late Preceramic times (6000-3000 B. P, ), and were collected from four sites, Paloma Village, Chilca I, the Asia Beach Site, and El Paraiso. It was anticipated that this data would enhance our.... Cultigens, represented in the coprolites by q h (~Cb & d h'1' p pp (~Cl. ) ly, fq 'ly encountered and did not represent more than two percent of the total macrofossil assemblage at any of the sites. Wild terrestrial plants, particularly grasses, however...

  5. Transition to Turbulence in Shear-Thinning Fluids

    E-Print Network [OSTI]

    Zhen, Ni

    2014-04-23T23:59:59.000Z

    1 == ? ? ===?= ? ? =?= + + + + y y yLy y Ly n n y n y n ( )15.2 We can rewrite the continuity equation as: 0= ? ? + ? ? + ? ? z w y v x u We then take the derivative of the continuity equation with respect to y : 0 2 2... =???? ?? ?? ???? ?? ?? ? ? ? ? + ? ? +???? ?? ?? ???? ?? ?? ? ? ? ? y w zy v y u x 0 0 2 2 = ? ? =y y v since 0 00 = ? ? = ? ? == yy y w y u 26 The Chebyshev-tau method is used to solve this coupled system. The four boundary conditions are satisfied as listed below. Let: 1 1 1 1 1 1 2 2 , n n n n pv v c v...

  6. 15 2006 IEEE International Solid-State Circuits Conference ISSCC 2006 / SESSION 2 / BIOMEDICAL SYSTEMS / 2.5

    E-Print Network [OSTI]

    Kelly, Shawn K.

    . The first and second were met by an inductive- ly coupled power and data link. The third was enabled and compensates for non-idealities due to process, temperature and voltage. Power from an inductive link requirements include: 1) an external source (i.e. no batter- ies), 2) wireless communication of external

  7. GNU/Linux Command-Line Tools Summary Gareth Anderson

    E-Print Network [OSTI]

    Richer, Jean-Michel

    fonts in OT1 encoding and created correct SGML for key combinations. Revision 0.7 5th December 2004 standards for the UNIX system trademark. Document should be ready for TLDP site. Revision v0.5 6th October - Conversion from LyX to DocBook SGML, Index generation Revision History Revision 1.2 15th April 2006 Revised

  8. 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

  9. (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) W(4orld Intellectual Property Organization III IIIIIIInIIIIIIII p aIIIIII IIIIIIIIIIIIIII III IIIII

    E-Print Network [OSTI]

    Robins, Gabriel

    /US]; 260 Wahoo Way, Apt # 1024, Charlottesville, Virginia 22903 (US). ROBINS, Gabriel [US/US]; 986 Laurel Glen, Char- lottesville, Virginia 22903 (US). (74) Agents: MADDEN, Robert B et al.; Schwegman, Lund, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA

  10. Duval County Extension Service -September, 2012 Call 904-255-7450 to register or for more information

    E-Print Network [OSTI]

    Watson, Craig A.

    "duval4h" to benefit 4-H Free Financial Webinar September 20 12:30 - 1:30 pm Save Money through Home Energy Efficiency Register at http://bit.ly/SaveEn Fall Gardening Workshop September 27 10 am -1 pm Money Budget Boot Camp series War on Poverty, Gateway Mall 5:30 pm, Register at 7667275 September

  11. IEEE Wireless Communications December 2005 691536-1284/05/$20.00 2005 IEEE Since routing is an

    E-Print Network [OSTI]

    Chen, Yuanzhu Peter

    to make the routing task energy-efficient instead of link relia- bility, the basic model shown in Fig. 1 through other nodes. These nodes are typically powered by batteries with limited energy supply. When a node exhausts its available energy, it ceases to function. This shutdown may potential- ly result

  12. 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

  13. MSU Extension Publication Archive Archive copy of publication, do not use for current recommendations. Up-to-date

    E-Print Network [OSTI]

    of low tempera- ture, CA is a supplement, rather than a substitute, for cold storage. With proper marked- ly in CA over cold storage so as to slow the rate of loss of stored carbohydrates within, can be stored longer in CA than in cold storage because the low oxygen and enriched carbon dioxide

  14. Understanding Forage Quality Analysis

    E-Print Network [OSTI]

    Stokes, Sandra R.; Prostko, Eric P.

    1998-03-23T23:59:59.000Z

    Understanding Forage Quality Analysis Sandra R. Stokes and Eric P. Prostko* L-5198 3-98 M any dairy producers in Texas do not have the land to grow their own forages. Consequent- ly, they rely on both local and out-of-state farmers for supplies...

  15. PROPOSED ENERGY PROVISIONS OF THE

    E-Print Network [OSTI]

    PROPOSED ENERGY PROVISIONS OF THE CALIFORNIA GREEN BUILDING STANDARDS CODE (UNMARKED) PART;Proposed Energy Provisions of the California Green Building Standards Code (Unmarked) Page 2 CHAPTER 4 N LY #12;Proposed Energy Provisions of the California Green Building Standards Code (Unmarked) Page

  16. EnvironmentalEffects of Dredging

    E-Print Network [OSTI]

    #~ EnvironmentalEffects of Dredging VOL D-91-2 INFORMATION EXCHANGE BULLETIN OCT 1991 Craney Island Experiment Station Fine-grained dredged material usual- ly enters a confined disposal area in a slurry of the soil matrix. The excess pore-water pressures are induced by the weight of overlying dredged material

  17. CONF-901007--48 Pi! ' " DR91 006 500

    E-Print Network [OSTI]

    Harilal, S. S.

    distillation (CD) unit. In the ARIES-I study, we use the CD on- A key safety concern in a D-T fusion reactor ly selected the columns will also be reduced, from 4 to I. material combinations, decided the operating design. To minimize the tritium in- 700 g. This paper discussed the calculations ventory in the Si

  18. Incomes of Migratory Agricultural Workers.

    E-Print Network [OSTI]

    Sargent, Frederic O.; Metzler, William H.

    1960-01-01T23:59:59.000Z

    . This was despite 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 labor was a major source of their income. In the 446 households surveyed, there was a total...

  19. Physica B 372 (2006) 286289 Thermal activation in Permalloy nanorectangles at room temperature

    E-Print Network [OSTI]

    Garcia-Cervera, Carlos J.

    2006-01-01T23:59:59.000Z

    orthogonal metallized tracks (word and bit lines), which induce a magnetic field in the free layer to reverse ¼ Lx=Ly) has been analyzed assuming uniform magnetization in the sample at room temperature-exponential factor in the Arrhenius formula for each aspect ratio. That allows us to estimate the relaxation time

  20. 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

  1. Measurements of Spin-Correlation Parameters all and Asl for P-]P-]-]Pid between 500 and 800 Mev

    E-Print Network [OSTI]

    Glass, G.; Bhatia, T. S.; Hiebert, John C.; Kenefick, R. A.; Nath, S.; Northcliffe, L. C.; Tippens, W. B.; Barlow, D. B.; Saha, A.; Seth, K. K.; Boissevain, J. G. J.; Jarmer, J. J.; Simmons, J. E.; Jeppersen, R. H.; Tripard, G. E.

    1985-01-01T23:59:59.000Z

    - ly 3?10%, while for the region 0?'& 70' (for the internal pion detector) it was 10?30%. The beam intensity was monitored with an Ar-Co~ ion chamber upstream of the target, and by a polarimeter con- sisting 'of four pairs of scintillation counters...

  2. 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

  3. Amir Dabirian Vice President for IT/CIO

    E-Print Network [OSTI]

    de Lijser, Peter

    Management and Quality Control o Digital Print Services o ERP Operating Systems/DBMS o ERP Technical Services Director of Internet Technologies and Development K. Ly Senior Director of IT Project Management Server and Storage Support o Telecommunications o Data Center o Project Management Support o Change

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

    ScienceCinema (OSTI)

    Catlett, Charlie

    2014-07-15T23:59:59.000Z

    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!

  5. Irradiated cubic single crystal SiC as a high temperature sensor Alex A. Volinsky

    E-Print Network [OSTI]

    Volinsky, Alex A.

    flux on the order of 21020 neutrons/cm2 at 0.18 MeV causes over 3% volume lattice expansion. Radiation-ray diffractometry, and heat-transfer. 3 irradiation interacts with SiC primarily by scattering off nuclei, an event, which, in turn, will complicate lattice parameter measurements. Neutron ly imparts energy and momentum

  6. An analysis of the driving records of AFROTC students at Texas A&M University

    E-Print Network [OSTI]

    Comstock, Thomas Williams

    1969-01-01T23:59:59.000Z

    ? and three vocational high schools in Brooklyn, ITew York. The resulls of the study showed that driver George Zo "lano a?d J'. 'i'(ayne Mrightstone, "Relationships of Briver Attitude to Aspects of Porno?allLy, Driver Knowledge, and Intelligence...

  7. Federal credit and insurance programs: Housing

    E-Print Network [OSTI]

    Quigley, John M.

    2006-01-01T23:59:59.000Z

    T . LO U I S R E V I E W Quigley Bunce, Harold L. ; Capone,W J U LY / A U G U S T Quigley Working Paper 294, University2005. Kain, John F. and Quigley, John M. Housing Markets and

  8. Federal Credit and Insurance Programs: Housing

    E-Print Network [OSTI]

    Quigley, John M.

    2006-01-01T23:59:59.000Z

    T . LO U I S R E V I E W Quigley Bunce, Harold L. ; Capone,W J U LY / A U G U S T Quigley Working Paper 294, University2005. Kain, John F. and Quigley, John M. Housing Markets and

  9. Kheshbn No. 119- Spring 1992 - Journal

    E-Print Network [OSTI]

    1992-01-01T23:59:59.000Z

    lyaKpnyoK ay:iD yryo H PHJTP^KJK WWK ÜD^JHKS /nDKnyD'b iyiPK ly .rnp jnyzi PX .lyp'D^KJK P^'ÜHKIKS üyi IIS Ü1K OKI

  10. The effects of dietary phenylalanine supplementation on ochratoxicosis in normal and partially nephrectomized rats

    E-Print Network [OSTI]

    Parker, Roger William

    1983-01-01T23:59:59.000Z

    ), and mice (creppy, et al. , 1980; Klinkert et al. , 1981) when phenylalanine is administered simultaneously. The excess phenyl alanine was gi ven parenteral ly to the mice. No studies of OA toxicity in the presence of excess dietary phenyl alanine have...

  11. Acclimation rate and resistance to lethal temperatures of 20-35 mm striped mullet, Mugil cephalus Linnaeus, at various salinities

    E-Print Network [OSTI]

    Pfeiffer, Gerald Patrick

    1971-01-01T23:59:59.000Z

    more populations. 18 MATERIALS AND METHODS Source of Fish 0 February 28. 1971, app u ' at ly4, 999~lac il c~ea 1 were captured on the west beach of Galveston Island. There were two sites of capture and two methods of capture. Station 1...

  12. Model program for the control and eradication of pullorum-typhoid infection from breeding/multiplier flocks in selected areas in Brazil

    E-Print Network [OSTI]

    Saraiva, Victor Emmanoel Vieira

    1982-01-01T23:59:59.000Z

    s, S. tyyh1, and S . enteri tidi s, which includes more than 1600 serotypes. The serotypes are primarily non- specific as far as hosts are concerned, but a few may infect some peel 1 t xcl sf ly. . g. . S. typal, S. ~t hl h, S. ghat hi C. spe ff...

  13. 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

  14. DOI: 10.1126/science.1243651 , 466 (2013);342Science

    E-Print Network [OSTI]

    Vocadlo, Lidunka

    2013-01-01T23:59:59.000Z

    -commercial use only. clicking here.colleagues, clients, or customers by , you can order high-quality copies demonstrated here (Fig. 3D). Solar system oxygen is more complicated, and the ini- tial solar nebular bulk composition is inadequate- ly defined. The measured oxygen composition of solar wind from Genesis concentrator

  15. Dielectronic satellite spectra of hydrogen-like titanium (Ti XXII)

    SciTech Connect (OSTI)

    Bitter, M.; von Goeler, S.; Cohen, S.; Hill, K.W.; Sesnic, S.; Tenney, F.; Timberlake, J.; Safronova, U.I.; Vainshtein, L.A.; Dubau, J.

    1983-07-01T23:59:59.000Z

    High resolution spectra of the Ly ..cap alpha../sub 1/ and Ly ..cap alpha../sub 2/ lines of hydrogenlike titanium, TiXXII, and the associated dielectronic satellites which are due to transitions 1snl-2pnl with n greater than or equal to 2, have been observed from tokamak discharges with auxiliary ion cyclotron heating (ICRH) with central electron temperatures of 2 keV and central electron densities of 8 x 10/sup 13/ cm/sup -3/ on the Princeton Large Torus (PLT). The data have been used for a detailed comparison with theoretical predictions based on the Z - expansion method and Hartree - Fock calculations. The results obtained with the Z - expansion method are in excellent agreement with the observed spectral data except for minor discrepancies between the theoretical and experimental wavelengths of 0.0003 A for the n = 2 satellites and of 0.0001 A for the separation of the Ly ..cap alpha../sub 1/ and Ly ..cap alpha../sub 2/ lines. Very good agreement with the experimental data is also obtained for the results from the Hartree - Fock calculations though somewhat larger discrepancies (approx. = 0.0009 A) exist between experimental and theoretical wavelengths which are systematically too small. The observed spectra are used for diagnosis of the central ion and electron temperatures of the PLT discharges and for a measurement of the dielectronic recombination rate coefficient of TiXXII.

  16. www.sciam.com SCIENTIFIC AMERICAN 49 Entrepreneurial Global Health

    E-Print Network [OSTI]

    Grizzle, Jessy W.

    virus six nanometers wide. She engineered a version of the virus that latched onto quantum dots, tiny, she could make them line up, an effective means of creating fine- ly spaced layers of quantum dots industries probably does not leap to mind. Global reinsurer Swiss Re is looking to change that. Having long

  17. Simulation of Gas Dynamic Behavior in Dry-Wall Inertial Fusion Energy Chambers

    E-Print Network [OSTI]

    Tillack, Mark

    . In this work, the code TSUNAMI [2] was used to model chamber gas dynamics for different shapes, sizes of size scaling. Previous- ly, TSUNAMI was used primarily for studying liquid protec- ted chambers which the basic response charac- teristics (with emphasis on the evolution towards a quiescent state

  18. Soil Science Society of America Journal Soil Sci. Soc. Am. J.

    E-Print Network [OSTI]

    Sparks, Donald L.

    is a persistent pollutant that adversely affects environmental resourc- es and human health. According to the U) and subsurface (10­20 cm) soils, respective- ly were reported for areas in the vicinity of industrial plants. Examples include Pb contamination due to battery recycling and salvage yards with discharge of waste oil

  19. 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

  20. The influence of clover and fertilizer on yield and leaf percentage of four warm-season grasses

    E-Print Network [OSTI]

    Conrad, Billy Ervin

    1958-01-01T23:59:59.000Z

    of calculation is used. gtl (ly)fdpl f tdg tg(~A'tt cut in the early leaf, late leaf, and flowering stages to sheep. The per- centage of total digestible nutrients was found to be similar in the two leaf stages but much lower in the flowering stage...

  1. KU Today, October 18, 2012

    E-Print Network [OSTI]

    : Mammal Skulls Oct. 18 5-7:30 p.m. Natural History Museum View all events TWITTER @KUCollege: @Forbes looks at #KU physicist's hypothesis of galactic gamma-ray burst in mass extinction 440 million years ago http://ow.ly/eyAz5 View all...

  2. 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

  3. 70 IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 37, NO.1, JANUARY 1992 Exact Computationof the Infimum in

    E-Print Network [OSTI]

    Benmei, Chen

    the Infimum in Hoo-Optimization Via Output Feedback Ben M. Chen, Student Member, IEEE, Ali Saberi, Member, 1991. Paper recommended by Associate Editor, D. S. Bernstein. The work of B. M. Chen and A. Saberi.-L. Ly was supported in part by NASA under Grants NAG-2-629 and NAG-1-121O. B. M. Chen and A. Saberi

  4. Climatological study of radar echo pictures from Albrook Air Force Base, Panama

    E-Print Network [OSTI]

    Bowen, Christopher

    1964-01-01T23:59:59.000Z

    ' Long. ) January 12 1. 72 0. 00 0. 48 1962--0. 00 April July 7. 76 0. 00 2. 47 1961--2. 20 9. 89 1. 73 7. 16 1961--5. 89 rainfall, whereas the rainfall for July, 1961, is 18 per cent lower that the 12-year mean month. ly rainfall. There- fore...

  5. The internal tide off Panama City, Florida 

    E-Print Network [OSTI]

    Boston, Noel Edward James

    1963-01-01T23:59:59.000Z

    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...

  6. 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...

  7. Sedimentology and geochemistry of an exceptionally preserved last interglacial sapropel S5 in the Levantine Basin (Mediterranean Sea)

    E-Print Network [OSTI]

    Gilli, Adrian

    Sedimentology and geochemistry of an exceptionally preserved last interglacial sapropel S5 of lithological, geochemical and physical sediment properties is reported from a complete- ly laminated S5 region of the eastern Mediterranean. The thickness of the studied sapropel S5 varies be- tween 85 and 91

  8. LAKE STATES AS~EN REPORT NO. 7 .. MECHANICAL PROPERTIES. .OF ASPEN

    E-Print Network [OSTI]

    _.j LAKE STATES AS~EN REPORT NO. 7 .·. MECHANICAL PROPERTIES. .OF ASPEN BY R. P. A. JOHNSON been. increasing interest in aspen ,(Populus tremuloides) in the Lak.~ Stat-es,, its availability and supp;Ly, properties and ,uses, and management. Aspen is a tree of primary importance in , 20 million

  9. Home Articles Directions Contact Green Resources & Links The Green Building Gallery Posted by Branden Klayko: Broken Sidewalk.

    E-Print Network [OSTI]

    Home Articles Directions Contact Green Resources & Links The Green Building Gallery Posted by Branden Klayko: Broken Sidewalk. The Green Building on East Market Street in the new ly named Nu The Green Building green. The 110-year-old structure is in the running for LEED Platinum certification

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

    ScienceCinema (OSTI)

    Jacob, Robert

    2014-11-24T23:59:59.000Z

    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.

  11. The role of music in the reconciliation of the religion and poetry of Gerard Manley Hopkins

    E-Print Network [OSTI]

    Samelson, Henry Salinas

    1987-01-01T23:59:59.000Z

    consciousness of the contradiction between them" (81). s' rr ly, ' ~DL'b t M'll ' pl' th t th p* *pt'o of truth depends on the clash between majority and minority opinion. This perception, the following passage suggests, is the product of this clash...

  12. 20 IAEI NEWS July.August 2008 www.iaei.org grid interconnections

    E-Print Network [OSTI]

    Johnson, Eric E.

    breakers be- ing back fed from utility-interactive PV inverters. We can use an equation of breaker ratings.iaei.org T he final connection between the pho- tovoltaic (PV) power system and the electrical utility grid are responsible for safety. These connections vary significant- ly from PV system to system due to the size

  13. Previous | Next | Table of Contents Research efforts are directed toward

    E-Print Network [OSTI]

    Schwartz, Stephen E.

    's climate cycles run on numerous time scales as well. The effect of adding carbon dioxide to the atmosphere- ganisms, plants, and other living things. The carbon dioxide emitted to the atmosphere from fossil fuel of carbon dioxide that enters the terrestrial biosphere and oceans, how rapid- ly it is removed from

  14. 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

  15. PPaAJ~f~-"'

    Office of Legacy Management (LM)

    ,ioeelble eve;ltualty of valuable m&ala other timn pnnium bsLc recoaorinl flwi these pII& reeiduom durLy or incIdental td the rooovcly of UlWllW? . Af%r consldemtion of the...

  16. 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

  17. A Semide nite Programming A11roa4h for the Nearest Eorrelation ...

    E-Print Network [OSTI]

    I n N u # e ! ic l n ly % i % nd i0'0% ppl ic "' ion % ( R ou %% e 1996 ) , vol u me 11 96 of L ec(' u ... P "! llel A lgo"! i0' h # % A ppl ", 13( 4 ) 2 8 9 - 30 5 , 1 999 . 17 ...

  18. Optimal Design and Management of a Smart Residential PV and Energy Storage System

    E-Print Network [OSTI]

    Pedram, Massoud

    University, Korea {dizhu, yanzhiwa, pedram}@usc.edu, naehyuck@elpl.snu.ac.kr Abstract-- Solar photovoltaic (PV) technology has been wide- ly deployed in large power plants operated by utility companies). On the other hand, the amount of electricity generated by the utility companies in a given area is relatively

  19. Public Service "The Minor That Matters"

    E-Print Network [OSTI]

    degree. Employees in public service have the opportunity to: vdeliver and manage public programs vaddressMinorThatMatters" TAKEYOURCAR EER IN ANENTIRE LY NEW DIRECTION #12;Public Service...The Minor That Matters Purpose of the Minor designed to provide a solid foundation in public administration and non-profit management, including

  20. A spider and other arachnids from the Devonian of New York, and reinterpretations of Devonian Araneae

    E-Print Network [OSTI]

    Selden, Paul A.; Shear, William A.; Bonamo, Patricia M.

    1991-06-01T23:59:59.000Z

    o d cuticle has also been altered, p robab ly by rcpolymerizat ion of the organic molecules, dur ing diagenesis. T h e a r t h r o p o d s are s trongly compressed , necessitating the use of special techniques , such as N D I C , to separate over...

  1. The design, construction, and testing of an experimental reverberation chamber

    E-Print Network [OSTI]

    Smahlik, Henry Joseph

    1975-01-01T23:59:59.000Z

    oscilla- *ions jn a gaseous, liquid, or solid body. The sound- ing body may vibrate transversely, longitudinally, or perform torsional vibrations around an axis. Consequent- ly, a medium must be acted upon by a vibration to induce sound, Of the three...

  2. Measuring Thickness Changes in Thin Films Due to Chemical Reaction by Monitoring the Surface

    E-Print Network [OSTI]

    Rutenberg, Andrew

    Roughness with In Situ Atomic Force Microscopy L.Y. Beaulieu,1 A.D. Rutenberg,1 and J.R. Dahn1,2 * 1 Physics on Received May 23, 2001; accepted October 15, 2001. *Corresponding author. E-mail: jeff.dahn@dal.ca Microsc

  3. MICH]GAN TECHNOLOGICALUNIVERSITY OMB CIRCULAR A-].33 SUPPI,EMENTARYFINAI{CIAI, REPORT

    E-Print Network [OSTI]

    AUDITORS ' REPORITSON COMPIJIA}ICE - The University as an EntiLY - Federal Financial Assistance Programs THE UNIVERSITY AS AN ENTITY To the Board of Control-, Michigan Technological University: We have audited the basic financial statements of MICHIGAN TECHNOLOGICALUNIVERSITY (the .University

  4. Formation of Calcium Phosphate Whiskers in Hydrogen Peroxide (H2O2) Solutions at 901C

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    )2) powders were aged in unstirred 30% H2O2 solutions at 901C for 48 h in ordinary glass media bottlesH, Buchs, Switzerland) were placed in a 250 mL capacity Pyrex s glass media bottle (Catalog No: 215 into the bottle. The bottle was tight- ly capped and manually shaken for 1 min, followed by keeping the bottle

  5. DECEMBER 2002 3499O E Y A N D L E E 2002 American Meteorological Society

    E-Print Network [OSTI]

    Sciences, Princeton University, Princeton, New Jersey (Manuscript received 4 June 2001, in final form 7 the continental slope of the U.S. east coast Corresponding author address: L.-Y. Oey, Program in Atmospher- ic and Oceanic Sciences, Princeton University, Forrestal Campus, Sayre Hall, Princeton, NJ 08544. E-mail: lyo

  6. Mesenchymal progenitor self-renewal deficiency leads to age-dependent osteoporosis in

    E-Print Network [OSTI]

    Waldman, Stephen D.

    Mesenchymal progenitor self-renewal deficiency leads to age-dependent osteoporosis in Sca-1 Ly-6A) The cellular and molecular mechanisms that underlie age-dependent osteoporosis, the most common disease uncharacterized mechanism of age-dependent osteoporosis in humans. Osteoporosis is a multifactorial, age

  7. Lactational responses to postruminal infusions of amino acids in dairy cows fed maize silage, hay or grass silage

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Lactational responses to postruminal infusions of amino acids in dairy cows fed maize silage, hay-Gilles, 35590 L'Hermitage, France Duodenal infusions of methionine and ly- sine have been shown to increase milk responses of dairy cows to methionine and lysine infusions with 3 other diets based on either maize silage

  8. Effects on milk protein yield of graded levels of lysine infused into the duodenum of dairy cows fed diets

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Effects on milk protein yield of graded levels of lysine infused into the duodenum of dairy cows). In order to determine ly- sine requirements, graded levels of lysine (0, 15, 30, 45 g/d) were infused period (2 wk) they received a duo- denal infusion of one dose of lysine + 11 g of methionine and enough

  9. COUNTRY INSTITUTION DATE WEB ADDRESS ALGERIA Universit d'Alger Benyoucef Benkhedda 13.12.2005 http://www.univ-alger.dz

    E-Print Network [OSTI]

    Guidoni, Leonardo

    ://www.uonbi.ac.ke KENYA Maseno University 09/07/2012 http://maseno.ac.ke/index/ LIBYA University of Garyounis 07.07.2005 http://www.garyounis.edu LIBYA Al-Arab Medical University 20.05.2010 http://www.amu.edu.ly MADAGASCAR

  10. COUNTRY INSTITUTION DATE WEB ADDRESS ALGERIA Universit d'Alger Benyoucef Benkhedda 13.12.2005 http://www.univ-alger.dz

    E-Print Network [OSTI]

    Di Pillo, Gianni

    ://www.jkuat.ac.ke KENYA University of Nairobi 20.06.2002 http://www.uonbi.ac.ke LIBYA University of Garyounis 07.07.2005 http://www.garyounis.edu LIBYA Al-Arab Medical University 20.05.2010 http://www.amu.edu.ly MADAGASCAR

  11. This article was published in an Elsevier journal. The attached copy is furnished to the author for non-commercial research and

    E-Print Network [OSTI]

    Szilagyi, Jozsef

    fluctuations Zolta´n Gribovszki a,b,*, Pe´ter Kalicz a , Jo´zsef Szila´gyi b,c , Miha´ly Kucsara a a Institute. Gribovszki), kaliczp @emk.nyme.hu (P. Kalicz), jszilagy@unlnotes.unl.edu (J. Szila´gyi). Journal of Hydrology

  12. UPTAKE AND RELEASE OF NITROGEN BY THE MACROALGAE GRACILARIA VERMICULOPHYLLA (RHODOPHYTA)1

    E-Print Network [OSTI]

    McGlathery, Karen

    , active- ly growing macroalgae release N to the water col- umn; yet little is known about the quantity the quantity of N released relative to assimilation and gross uptake by Gracilaria vermiculophylla (Ohmi%­90% of the biomass. There was good agreement between laboratory and field measurements of N uptake and release. Daily

  13. Approved for public release; distribution is unlimited; September 2013. Other requests shall be referred to NAVFAC EXWC or ESTCP.

    E-Print Network [OSTI]

    -Weiss, LBNL Nathan Finch, NAVFAC EXWC Craig Wray, LBNL Mark de Ogburn, NAVFAC Atlantic Woody Delp, LBNL Hashem Akbari, LBNL Scott Smaby, NAVFAC EXWC Ronnen Levinson, LBNL Bret Gean, NAVFAC EXWC SEI Group, Inc. #12 ESTCP Number: EW-200813 September 2013 Peter Ly, NAVFAC EXWC George Ban-Weiss, LBNL Nathan Finch, NAVFAC

  14. MENTAL ILLNESS in the CLASSROOM

    E-Print Network [OSTI]

    MENTAL ILLNESS in the CLASSROOM: How Educators Can Help Students Succeed Ingle International cares with parents or health care practitioners about a student's mental health issue. Make your first step informing to start: · Canadian Mental Health Association: http://bit.ly/bmDylH · Centre for Addiction and Mental

  15. 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]

    Collar, Juan I.

    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

  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. www.sciencemag.org SCIENCE VOL 328 7 MAY 2010 677 NEWSOF THEWEEK

    E-Print Network [OSTI]

    Thorpe, Roger Stephen

    patterns, says Takeshi Imamura, a planetary scientist at JAXA's Institute of Space and Astronautical study. http://bit.ly/baldeagle-comeback CREDITS:(TOP)JAXA Exploration Agency (JAXA) is out to solve this problem with its Akatsuki mission, slated for launch on 18 May

  18. Oak Ridge National Laboratory Science & Technology Highlights

    E-Print Network [OSTI]

    Pennycook, Steve

    of ethanol's lower energy content. The BioPower, current- ly sold only in Europe, reportedly does not suffer-of-the art ve- hicles or engines for duction of biomass. This combination of tools is expected to boost biomass production success--computer model- ing and data collection are being used to help determine

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

    SciTech Connect (OSTI)

    Catlett, Charlie

    2014-06-17T23:59:59.000Z

    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!

  20. 0 20 40 60 80 100 Miles 0 20 40 60 80 100 120 140 160 Kilometers

    E-Print Network [OSTI]

    Pasternack, Gregory B.

    a specific amount of water. AE express- es how well an irrigation system can potential- ly distributes 1 shows the AE values used for different irrigation systems (Canessa et al. 2011). Re- gional AE estimates in Table 2 were esti- mated using a weighted average of AE and irrigation system's crop acreage

  1. 0 20 40 60 80 100 Miles 0 20 40 60 80 100 120 140 160 Kilometers

    E-Print Network [OSTI]

    Pasternack, Gregory B.

    - liver a specific amount of water. AE express- es how well an irrigation system can potential- ly depth. Table 1 shows the AE values used for different irrigation systems (Canessa et al. 2011). Re- gional AE estimates in Table 2 were esti- mated using a weighted average of AE and irrigation system

  2. n to Fall 2 d the State

    E-Print Network [OSTI]

    t T th N D b r S S a FU Exam __________ *Yo ake the (Open The exam he follow November December ____________________ on g on "EI ldpagenam agename= ly as instr o not leav N/A. written. nature lin ate of Co Agencies ons

  3. Sub-m icron Environm ental M agnetic Particles: Inferences and Associated Problem s

    E-Print Network [OSTI]

    for air-bo rne particu late pollution, w h ich can be effectiv e ly m o n ito red u sin g sim p le m a g n used to in fer the nature and forcing m echanis m s o f th e enviro n m ental change. Each o f

  4. 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

  5. scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics

    E-Print Network [OSTI]

    Constable, Steve

    landscape systems, Werner lidar, Kent lunar magnetism and seismology, Johnson marine electromagnetic and geology; deep and shallow struc- tures in seismology; and the history of the geo- magnetic field. We; for monitoring the spatial- ly averaged temperature in the oceans from their acoustic characteristics

  6. North Carolina State University, Campus Box 7409, Raleigh, NC 27695 | 919-513-7831 | www.cleantransportation.org 9/17/12 Advancing Clean Energy for a Sustainable Economy

    E-Print Network [OSTI]

    .cleantransportation.org 9/17/12 Advancing Clean Energy for a Sustainable Economy Clean Transportation | Campus Box 7409 of Transportation. The NC Division of Air Quality and State Energy Office contributed an additional $200,000 each five (5) countries ­ Korea, Turkey, Russia, Poland and Ita- ly. Together, these countries account

  7. North Carolina State University, Campus Box 7409, Raleigh, NC 27695 | 919-513-7831 | www.nccleantech.ncsu.edu 9/17/12 Advancing Clean Energy for a Sustainable Economy

    E-Print Network [OSTI]

    .nccleantech.ncsu.edu 9/17/12 Advancing Clean Energy for a Sustainable Economy Clean Transportation | www. The NC Division of Air Quality and State Energy Office contributed an additional $200,000 each. Local sub five (5) countries ­ Korea, Turkey, Russia, Poland and Ita- ly. Together, these countries account

  8. An analysis of 4-H club training and the educational and occupational goals of 4-H club members

    E-Print Network [OSTI]

    York, Gerald M

    1959-01-01T23:59:59.000Z

    Activities ~ 4 ~ ~ Result Demonstrations mam04j 'by l, -ii Club embers For Future Stu(ly . l) H Act. " vit ice esi?eEJ i)0y . ushers ~ 0 8 Distance Club iembers Travol from their P)esMence tc School Time R~nire)i by Club ~ to Travel from their Home...

  9. Video Object Discovery and Co-segmentation with Extremely Weak Supervision

    E-Print Network [OSTI]

    Cortes, Corinna

    Video Object Discovery and Co-segmentation with Extremely Weak Supervision Le Wang , Gang Hua of Technology Google Research Abstract. Video object co-segmentation refers to the problem of simultaneous- ly segmenting a common category of objects from multiple videos. Most existing video co-segmentation methods

  10. Nepal's peace process and challenges ahead

    E-Print Network [OSTI]

    Richner, Heinz

    Nepal's peace process and challenges ahead Context and policy connections When the Communist Party of Nepal (Maoist) [CPN(M)] and the Seven Party Alliance government signed the CPA on 21 November 2006 and the United Nations worked collective- ly to achieve peace and stability. The United Nations Mission in Nepal

  11. 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

  12. chology. Clearly, such connections have served psychology very well, helping us, for

    E-Print Network [OSTI]

    Pillow, Jonathan

    sciences should be investigated, Buss et al. went a step beyond science and present- ed a philosophically. Specifical- ly, Buss et al. put the cart before the horse when they said that exaptations and span- drels and that fre- quently cannot be disproved either. Buss et al.'s (1998) article seems to be arguing

  13. LIU ET AL. VOL. XXX ' NO. XX ' 000000 ' XXXX www.acsnano.org

    E-Print Network [OSTI]

    Cui, Yi

    , different applications (grid storage, electric vehicles, and portable electronic devices) may re- quire particles,2 and more recent- ly, Si nanostructures have been reported to allow high battery performance.3À6 These nanostructures not only effectively solve the pulverization problem of the Si anode but also allow high operation

  14. www.sciencemag.org SCIENCE VOL 343 7 MARCH 2014 1055 EDITED BY STELLA HURTLEY

    E-Print Network [OSTI]

    Napp, Nils

    is poor- ly resolved. Global-scale analyses are fraught with technical difficulties, including problems Polaritons Engineered heterostructures consisting of thin, weakly bound layers can exhibit many attractive of such "dual" traits. Chung et al. (p. 1148, published online 13 February) now demonstrate that specific

  15. absorption models linear: Topics by E-print Network

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

    absorption models linear First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 A Simulation of Ly-alpha...

  16. Alaska Nanooks Blue and Gold Game October 5, 2012 ALASKA POST

    E-Print Network [OSTI]

    - portation and personal property. Renner,whowasnamed the supervisor of the quarter, has the number- one item. Johnson, gar- rison commander. He was talking about the civilian employee recognition program cer- emony, Lincoln Hawkes. In addition, he manages a staff of eight, rated a high- ly satisfactory on his June 2012

  17. advanced construction technology: Topics by E-print Network

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

    construction technology First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 P.G. Ioannou and L.Y. Liu...

  18. advanced construction technologies: Topics by E-print Network

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

    construction technologies First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 P.G. Ioannou and L.Y. Liu...

  19. Surface organization of aqueous MgCl2 and application to atmospheric marine

    E-Print Network [OSTI]

    900 km inland (2). Aerosols play a key role in the modification of global climate through their effect on cloud condensation nu- clei prevalence, radiative balance, and level of precipitation (3). Aerosol structurally at high concentrations (>3.1 M). Final- ly, the MgCl2 concentration effect on a fatty acid coated

  20. Phase-resolved HST/STIS spectroscopy of the exposed white dwarf in the high-field polar AR UMa

    E-Print Network [OSTI]

    B. T. Gaensicke; G. D. Schmidt; S. Jordan; P. Szkody

    2001-03-08T23:59:59.000Z

    Phase-resolved HST/STIS ultraviolet spectroscopy of the high-field polar AR UMa confirms that the WD photospheric Ly alpha Zeeman features are formed in a magnetic field of ~200 MG. In addition to the Ly alpha pi and sigma+ components, we detect the forbidden hydrogen 1s0->2s0 transition, which becomes ``enabled'' in the presence of both strong magnetic and electric fields. Our attempt in fitting the overall optical+UV low state spectrum with single temperature magnetic WD models remains rather unsatisfactory, indicating either a shortcoming in the present models or a new physical process acting in AR UMa. As a result, our estimate of the WD temperature remains somewhat uncertain, Twd=20000+-5000K. We detect a broad emission bump centered at ~1445A and present throughout the entire binary orbit, and a second bump near ~1650A, which appears only near the inferior conjunction of the secondary star. These are suggestive of low harmonic cyclotron emission produced by low-level (M-dot~1e-13 Msun/yr) accretion onto both magnetic poles. However, there is no evidence in the power spectrum of light variations for accretion in gas blobs. The observed Ly alpha emission line shows a strong phase dependence with maximum flux and redshift near orbital phase phi~0.3, strongly indicating an origin on the trailing hemisphere of the secondary star. An additional Ly alpha absorption feature with similar phasing as the Ly alpha emission, but a \\~700km/s blueshift could tentatively be ascribed to absorption of WD emission in a moderately fast wind. We derive a column density of neutral hydrogen of NH=(1.1+-1.0)1e18 cm**-2, the lowest of any known polar.

  1. The large-scale cross-correlation of Damped Lyman alpha systems with the Lyman alpha forest: first measurements from BOSS

    SciTech Connect (OSTI)

    Font-Ribera, Andreu [Institute of Theoretical Physics, University of Zurich, 8057 Zurich (Switzerland); Miralda-Escudé, Jordi [Institució Catalana de Recerca i Estudis Avançats, Barcelona, Catalonia (Spain); Arnau, Eduard [Institut de Ciències del Cosmos (IEEC/UB), Barcelona, Catalonia (Spain); Carithers, Bill; Ross, Nicholas P.; White, Martin [Lawrence Berkeley National Laboratory, University of California Berkeley, Berkeley, California 94720 (United States); Lee, Khee-Gan [Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg (Germany); Noterdaeme, Pasquier; Pâris, Isabelle; Petitjean, Patrick; Rollinde, Emmanuel [Institut d'Astrophysique de Paris, Université Paris 6 et CNRS, 98bis blvd. Arago, 75014 Paris (France); Rich, James [CEA, Centre de Saclay, IRFU, 91191 Gif-sur-Yvette (France); Schneider, Donald P. [Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States); York, Donald G., E-mail: font@physik.uzh.ch, E-mail: miralda@icc.ub.edu [Department of Astronomy and Astrophysics and The Fermi Institute, Chicago University, 5640 So. Ellis Ave., Chicago, IL 60637 (United States)

    2012-11-01T23:59:59.000Z

    We present the first measurement of the large-scale cross-correlation of Ly? forest absorption and Damped Lyman ? systems (DLA), using the 9th Data Release of the Baryon Oscillation Spectroscopic Survey (BOSS). The cross-correlation is clearly detected on scales up to 40h{sup ?1}Mpc and is well fitted by the linear theory prediction of the standard Cold Dark Matter model of structure formation with the expected redshift distortions, confirming its origin in the gravitational evolution of structure. The amplitude of the DLA-Ly? cross-correlation depends on only one free parameter, the bias factor of the DLA systems, once the Ly? forest bias factors are known from independent Ly? forest correlation measurements. We measure the DLA bias factor to be b{sub D} = (2.17±0.20)?{sub F}{sup 0.22}, where the Ly? forest redshift distortion parameter ?{sub F} is expected to be above unity. This bias factor implies a typical host halo mass for DLAs that is much larger than expected in present DLA models, and is reproduced if the DLA cross section scales with halo mass as M{sub h}{sup ?}, with ? = 1.1±0.1 for ?{sub F} = 1. Matching the observed DLA bias factor and rate of incidence requires that atomic gas remains extended in massive halos over larger areas than predicted in present simulations of galaxy formation, with typical DLA proper sizes larger than 20 kpc in host halos of masses ? 10{sup 12}M{sub ?}. We infer that typical galaxies at z ? 2 to 3 are surrounded by systems of atomic clouds that are much more extended than the luminous parts of galaxies and contain ? 10% of the baryons in the host halo.

  2. Dynamic homology and phylogenetic systematics: a unified approach using POY

    E-Print Network [OSTI]

    Wheeler, Ward C.; Aagesen, Lone; Arango, Claudia P.; Faivovich, Juliá n; Grant, Taran; D’ Haese, Cyrille; Janies, Daniel; Smith, William Leo; Varó n, André s; Giribet, Gonzalo

    2006-01-01T23:59:59.000Z

    the relative 9 G ui de lin es 1 Da ta 11 In sta lla tio n 3 A na ly sis 13 In pu t/ O ut pu t 14 T ut or ia ls 15 C om m an ds 7 Ev al ua tio n 8 Pa ra lle l8 Chapter 1 merits of alternative historical expl anations. All observations are consis- tent... ta 11 In sta lla tio n 3 A na ly sis 13 In pu t/ O ut pu t 14 T ut or ia ls 15 C om m an ds 7 Ev al ua tio n 8 Pa ra lle lData 9 and can include behavior, while molecular data consists of nucleic acids, proteins, and genomes. This distinction...

  3. Masking line foregrounds in intensity mapping surveys

    E-Print Network [OSTI]

    Breysse, Patrick C; Kamionkowski, Marc

    2015-01-01T23:59:59.000Z

    We address the problem of line confusion in intensity mapping surveys and explore the possibility to mitigate line foreground contamination by progressively masking the brightest pixels in the observed map. We consider experiments targeting CO(1-0) at $z=3$, Ly$\\alpha$ at $z=7$, and CII at $z=7$, and use simulated intensity maps, which include both clustering and shot noise components of the signal and possible foregrounds, in order to test the efficiency of our method. We find that for CO and Ly$\\alpha$ it is quite possible to remove most of the foreground contribution from the maps via only 1%-3% pixel masking. The CII maps will be more difficult to clean, however, due to instrumental constraints and the high-intensity foreground contamination involved. While the masking procedure sacrifices much of the astrophysical information present in our maps, we demonstrate that useful cosmological information in the targeted lines can be successfully retrieved.

  4. A computer method for the automatic recovery of short monoalphabetic substitution ciphers 

    E-Print Network [OSTI]

    Wright, Thomas Wyatt

    1967-01-01T23:59:59.000Z

    (5tllD) ( ALPHA (J)g J=ly?6) DO 500 I = lt26 500 READ(5y776)(CONTAC( IyJ)eJ=ly?6) CALL 'BILDPT C+IOO IO 11 21 24 25 READ(5 ~ 100) IPAT? l){Q +++ IN BILDPT FORMATf9X 416, 3X 4A6) READ (5?l ) '(IHEAD( J J J) ?JJ J=1 ? ll ) ?N? )HEAD( 12...KPN{10) r IPT{'SNt 10) r'r NPATSr I SONE CONNON /C/ Kt26)r TABC{26) KTt26) ~ ALPHA{26) CRYPTt2000) CQM){ON /E/ CRYPTP{2000) CONNON /DINK/ LOGIC4 ~ {OGIC5rKPOS{10r4r'&5) r KPN2{40)r IDINKr IBESTt40) CONNON /CONTFR/ CONTAC t 26 ~ Z6) r ICON{ 65...

  5. Theoretical model for plasma expansion generated by hypervelocity impact

    SciTech Connect (OSTI)

    Ju, Yuanyuan; Zhang, Qingming, E-mail: qmzhang@bit.edu.cn; Zhang, Dongjiang; Long, Renrong; Chen, Li; Huang, Fenglei [State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081 (China); Gong, Zizheng [National Key Laboratory of Science and Technology on Reliability and Environment Engineering, Beijing Institute of Spacecraft Environment Engineering, Beijing 100094 (China)

    2014-09-15T23:59:59.000Z

    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.

  6. The influence of nitrogen rate and source on plant and soil properties

    E-Print Network [OSTI]

    Fisher, Flake Leroy

    1959-01-01T23:59:59.000Z

    . Anhydrous ammonia caused the lea s t a lteration of pH in the su r face , but it caused the greatest acid ity in the subso i l . The lev e ls of nitrates in the so il w ere exp re s sed by quadratic equa? tions with co rre la t ion coe ff ic... , and and are the annual rate of nitrogen in pounds p er a c r e app lied as ammonium nitrate and anhydrous ammonia, r e sp e c t iv e ly . P red ic ted maximum y ields com pared favorab ly with the actual m aximum y ie lds o f 1 9 , 9 9 0 and 15, 850 pounds...

  7. PRECEDING F!_GE E_LA."jK _OT F:LP#,ED THE ROLES OF HUMANS AND ROBOTS AS

    E-Print Network [OSTI]

    Spudis, Paul D.

    307 PRECEDING F!_GE E_LA."jK _OT F:LP#,ED THE ROLES OF HUMANS AND ROBOTS AS FIELD GEOLOGISTS field study on the Moon is through the use of teleoperated robots, under the da'rect control of a human geologist who remains at the lunar base, or poss_ly on Earth. These robots umuld hate a global traverse

  8. Ultrastructure of the capitular filaments of Penicillus dumetosus (Chlorophyceae; Siphonales)

    E-Print Network [OSTI]

    McKenzie, Michael Dooley

    1974-01-01T23:59:59.000Z

    or rhombohedral calcite with no mixture of the two minerals (Chave, 1954). Calcium oxalate crystals have been reported occasionally (Tandler, 1962; Dawes, 1969). For some time it was thought that photosynthesis was direct- ly related to algal calcification... of calcium salts are formed. Most of the information was based on studies of the formation of calcium oxalate raphides and styloids. The crystals form in crystal idioblasts. These cells contain mitochondria, golgi bodies, an extensive endo- plasmic...

  9. A measure of the extent of part-time and full-time unemployment in the United States: 1949-1958

    E-Print Network [OSTI]

    Bridges, Gilbert Sadler

    1960-01-01T23:59:59.000Z

    of the Census, " ~o . cit. , 2. 21 a ia('\\v ', i(acre 0! . ':. iI ''ic ', ich 0 vt', , r~ cir'I cv, cI', t nrI ?i&h? or rcting them from i;hc ("!pl c', ycd. partial ly unn". 010' cd. C11. pact, - I, imc:!orkcrs--?, , ucl f ul l ? t i!me ind ir;, u'! 1 r(1 i...

  10. Direct observation of intermediates in a thermodynamically controlled solid state dynamic covalent reaction

    E-Print Network [OSTI]

    Belenguer, Ana M.; Lampronti, Giulio Isacco; Wales, David J.; Sanders, Jeremy Keith Morris

    2014-10-14T23:59:59.000Z

    Accepted” as a free service to the research community to expedite the dissemination of scientific material as soon as possible after acceptance. “Just Accepted” manuscripts appear in full in PDF format accompanied by an HTML abstract. “Just Accepted... , very small amounts of added liquid can dramatical- ly accelerate and even enable mechanochemical reactions between solids.11b,24 As yet little is known about the mech- anisms and the driving forces involved in the chemical syntheses and supramolecular...

  11. Marketing Reordering of the Electric Utility Industry

    E-Print Network [OSTI]

    Anderson, J. A.

    . Residential customers original ly used electricity to light their homes. Elec tric power now has literally thousands of uses. Similarly, commercial customers now use electricity to compute, control, provide comfort, as well as illuminate offices... generated power. However, such displacement requires "wheeling", which is the use of transmission facilities of one electric system to transmit power of and for others. Market forces are developing tremendous in dustrial interest in wheeling...

  12. TAXPRACTITIONER'S Tax PracTiTioner's insTiTuTe

    E-Print Network [OSTI]

    Rosen, Jay

    Federal & nYs Tax Law updates. Designed for CPA's, Enrolled Agents and other tax practitioners tuition includes all sessions, materials, refreshment breaks and the $15 registration fee. approved by nYs Building, room 118P DaYs onLY: MondaythroughFriday,9am-4:45pm (OfficeclosedJan.1,19;Feb.12,16,and;May25) We

  13. A study of changes in the histology and histochemistry of oyster tissues caused by Dermocystidium marinum and cytological studies of this parasite

    E-Print Network [OSTI]

    Stein, Jerome Everett

    1957-01-01T23:59:59.000Z

    s in human sa liva gave the sam e re su lts as the m alt d ia s ta se . E n zym atic trea tm en t w as u sed on ly on th ose t is su e s w h ich w e re rea c ted w ith S ch if f 's reagen t. R esu lts 1. P e r io d ic a c id -S ch if f m...

  14. EXECVT1VE OFFICE ~ THE PRESIl BIT OFRCE OF ...,.., neaur ~ aDIIrT

    E-Print Network [OSTI]

    US Army Corps of Engineers

    . ~ . .' · EXECVT1VE OFFICE ~ THE PRESIl BIT OFRCE OF ...,.., neaur ~ aDIIrT W.neral Accounting Office (GAO) and -.any ~on Cenenla (IGa) bave conaiat.nt.ly ooncluded ·th~ ~tft- ua. ot value el)9-·..t:ablished prograu, the GAO and IG reP'i1~ conclude that .uch .are can and should be c!on~':to· realize"the , benefit

  15. Alpha Kappa Alpha Artificial Records, 1932-2000s

    E-Print Network [OSTI]

    2015-01-01T23:59:59.000Z

    THE OTHER SIDE OF THE RAINBOW ..... -; ALPHA KAPPA ALPHA SORORITY DELTA CHAPTER A REAL POT OF GOLD LIFt" EV'RY vOICE AND SING Li.6,t eV'!LY vo-i.c.e and ~-i.ng, T-i...t ea-uh and heaVe.l1 iU'lg, KUla w-i.,th tne. hMmolUe!.> 06 Llbeuy; Lei oun. !Le60...

  16. A comparison of two simplified techniques for end-to-end tracheal anastomosis

    E-Print Network [OSTI]

    Hedlund, Cheryl Sue

    1981-01-01T23:59:59.000Z

    , 2, 4 and 8 weeks postoperatively. There were minimal postoperative problems with infection, mucostasis, coughing, stridor or anastomotic separation. Stenosis of the anastomo- tic site was observed in 80% of the cases. This was due to the intra... adequate cough reflex. The anastomotic technique must not permanent- 3 ly interfere with mucus flow or the cough reflex. Mucostasi. s occurs if the vagus or recurrent laryngeal nerves are damaged and the cough reflex is lost. Trauma and anatomical breaks...

  17. An osmolarity and ultrastructure study of cotton embryo tissue and protoplasts

    E-Print Network [OSTI]

    McLendon, Donna Viretha

    1976-01-01T23:59:59.000Z

    - ly post-fixed in 400 mosM solutions. Micrographs indicate extensive membrane and organelle damage. Protoplasts were also enzymatically isolated from live cotton embryo tissue at 800 mosM and fixed in glutaraldehyde in 800 mosM solu- tions.... "Onozuka" cellulase concentration 14 Rate of decrease in viscosity of substrate vs. "Rhozyme" hemicellulase concentration . . . . . . . . . . . . . . . 16 Electron micrograph of cotton embryo tissue fixed in the 200 mosM treatment noting sparse areas...

  18. The effects of thermal and hygroscopic loads on unsymmetric composite laminates

    E-Print Network [OSTI]

    Ross, George Ray

    1991-01-01T23:59:59.000Z

    is expanded to accommodate hygrothermal loads in addition to tension and torsion loads. To further the understanding of these unique laminates, this finite element program is used to determine the stress fields of unsymmetric IN7/977-2 laminates subjected... to tension and torsion loads and hygrothermal gradients. The [Ol/45&]& stacking sequence is selected as the unsymmetric laminate to be studied experimental ly and analytically. Other laminates studied are [0&/45&]&, [90]&, [45]&, and [0]I. The IM7...

  19. Interspecific association and dispersion patterns of the red imported fire ant, aphids and some predaceous insects in a cotton agroecosystem

    E-Print Network [OSTI]

    Reilly, Joseph John

    1982-01-01T23:59:59.000Z

    and Some Predaceous Insects in a Cotton Agroecosystem. (August 1982) Joseph John Rei 1 ly, B. S. , Vi llanova University Chairman of Advisory Committee: Dr. Winfield Sterling Interspecific association between the red imported f1re ant, ~S ieno sis... and aphids. ACKNOWLEDGEMENTS I wish to dedicate this thesis to my mother, Rose Ellen Rei lly, whose encouragement and support have made this study possible. I would like to extend my sincere gratitude to my major professor, Dr. Winfield Sterling for his...

  20. 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

  1. Vegetative regeneration in selected south Texas shrubs

    E-Print Network [OSTI]

    Flinn, Robert C.

    1986-01-01T23:59:59.000Z

    . Study Site. Regenerative Structure Description. Sprouting Potential of Roots. Motte Regeneration. Regrowth Comparison. Shrub Stem Classification. . 13 . . . 14 16 17 17 18 RESULTS AND DISCUSSION. Regenerative Morphology Desert Yaupon Lime... varying regenerative responses of south Texas shrubs following burning. Lime pricklyash (~n~xlum tacaara (L. ) Sarg. ) suffered the least mortality (4%) while the highest mortality (40%) occurred with lotebush. Lime pricklyash sprouted vigorous- ly...

  2. Personalized low polygon count facial models for real time applications

    E-Print Network [OSTI]

    Mitchell, Ryan Troy

    2002-01-01T23:59:59.000Z

    contribution of this thesis is ihe developrncnt of a robust user interface to consiruci faces. In rny approach, each region of the face ts controlled bv a set of sliders that. are placed according to the positions of corresponding regions. Based... approach io facial animation using facial muscles was developed l&y 'vVatcrs [6] in 1987. Waters and Terzopoulos [7] also presenterl a method- ology to include geometrically accurate polygonal facial representations. The faces were constructed...

  3. A study of the effects of stimulation on Devonian Shale gas well performance 

    E-Print Network [OSTI]

    Zuber, Michael Dean

    1985-01-01T23:59:59.000Z

    that makes up the Appalachian Basin. The Devonian Shale is economical- ly productive from many different combinations of reservoir parameters. Consistencies in reservoir characteristics seem to exist only on a county by county basis (and much smaller... fracture, and ky is the formation permeability in the direction perpendic- ular to the induced hydraulic fracture (see Fig. 2). Figure 2 is a schematic diagram showing how this model was used to simulate a Devonian Shale well with permeability...

  4. 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

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

    E-Print Network [OSTI]

    Gruenwald, Guillermo Jose Samuel

    1974-01-01T23:59:59.000Z

    , 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...

  6. The effect of soil parameters on earth penetration of projectiles

    E-Print Network [OSTI]

    Ferguson, George Harley

    1969-01-01T23:59:59.000Z

    , and im- pact velocities ranging from 150 to 300 feet per second. This work was performed at the Terramechanics Laboratory at the Texas A&M University Research Annex. The work was iv sponsored by Sandia Corporation of Albuquerque, New Mexico... and In undersea loca- tions; and 6) design of penetrometer anchors for both land and undersea use. Sandia Laboratories, prime contractor to the Atomic Energy Commission, became concerned with the study of earth impact as ear- ly as 1960. The direct primary...

  7. 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

  8. This article was published in an Elsevier journal. The attached copy is furnished to the author for non-commercial research and

    E-Print Network [OSTI]

    Szilagyi, Jozsef

    ´zsef Szila´gyi a,b,*, Zolta´n Gribovszki a,c , Pe´ter Kalicz c , Miha´ly Kucsara c a Department of Hydraulic et al. (Gribovszki, Z., Kalicz, P., Szilagyi, J., Kucsara, M., 2008. Riparian zone evapotranspiration. Tel.: +1 36 1 463 1885; fax: +1 36 1 463 1879. E-mail address: jszilagyi1@unl.edu (J. Szila´gyi

  9. Income and Cost Analysis: Cooperative Cotton Gins and Cooperative Supply Associations of Texas, Season 1949-50.

    E-Print Network [OSTI]

    Paulson, W. E.

    1955-01-01T23:59:59.000Z

    Income and Cost Analysis Cooperative Cotton Gzns and Cooperative SuppLy * As~ociations of Texas, Season 1949-50 in cooperation with the UNITED STATES DEPARTMENT OF AGRICULTURE TEXAS AGRICULTURAL EXPERIMENT STATION R. D. LEWIS. DIRECTOR.... COLLEGE STATION. TEXAS DIGEST There were significant changes in ginning incomes and ginning costs from the period 1932-38 to' the season 1949-50, For like volumes of ginning, costs increased by 300 percent; ginning income in- creased by 220 percent. I...

  10. The relation of mechanical impedance to selected soil responses under rapid loading conditions

    E-Print Network [OSTI]

    Zirjacks, Winston Luther

    1970-01-01T23:59:59.000Z

    and white interface. Many different paints were tested for cracking und. . r elongation, and this rombination proved to perform satis- factori ly. During the preliminary static testing of samples, it was found that the expected vei. tical deformation... the loading part of the saw-tooth function, however, the dial gauge was hard to read and overshoot was present. So, the load was dialed in using various percentages of maximum load statically, and the actual load from the proving ring, the percentage...

  11. 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

  12. A JOINT ANALYSIS OF HIGH-ENERGY NEUTRONS AND NEUTRON-l)ECAY PROTONS FROM A FLARE

    E-Print Network [OSTI]

    Usoskin, Ilya G.

    A JOINT ANALYSIS OF HIGH-ENERGY NEUTRONS AND NEUTRON-l)ECAY PROTONS FROM A FLARE I.. G. KOCI'l.I)elel:sl~zHg 194021. RHs.ffa (Received ll April, 19%; in final form 19.1uly., 1996) Abstract. A .joint. analysis of the 1990 May 24 neutron event provided an oppor u ~ ly to delect neu[ron decay prolons of higher energies

  13. Modelling of light and temperature influences on cyanobacterial growth and biohydrogen production

    E-Print Network [OSTI]

    Zhang, D.; Dechatiwongse, P.; Rio-Chanona, E. A. del; Maitland, G. C.; Hellgardt, K.; Vassiliadis, V. S.

    2015-04-03T23:59:59.000Z

    . Lipids are usually used to generate biodiesel, while starch and sugars are always converted to eth- anol, hydrogen and other biofuels [30]. Conventional diesel and gaso- Recent research found that Cyanothece sp. ATCC 51142 (Cyanothece 51142), a type... generation process, which could m economical [13].[21]. Meanwhile, it is accepted that it is unsustainable to continuous- ly rely on limited and nonrenewable conventional fuels [8]. To re- duce the production of CO2 and fulfil the increasing demand for energy...

  14. Implications of Alternative Methods for Determining Agricultural Price and Income Supports.

    E-Print Network [OSTI]

    Wesley, E.; Peterson, F.

    1986-01-01T23:59:59.000Z

    ...................................... 10 Conclusion ........................................ 12 Implications of Alternative Methods for Determining Agricultural Price and Income Supports INTRODUCTION In modern economies, prices are determined through market forces , administrative... implication of these notions is that prices should be determined by the market. However, market prices can be considered optimal on ly if certain conditions are met. The existence of monopolies, externalities and public goods, for example, results in a...

  15. IOP PUBLISHING CLASSICAL AND QUANTUM GRAVITY Class. Quantum Grav. 25 (2008) 035004 (9pp) doi:10.1088/0264-9381/25/3/035004

    E-Print Network [OSTI]

    Byer, Robert L.

    not to damage sensitive optical surfaces. PACS numbers: 04.80.Nn, 95.55.Ym, 07.60.Ly, 41.75.-i, 07.77.Ka, 79 damage or contaminate optical coatings in vacuum. For example, the GP-B UV lamps of figure 1 have distribution on insulators under UV illumination. (b) High flux UV radiation at or below 254 nm can potentially

  16. Onsite Wastewater Treatment Systems: Operation and Maintenance

    E-Print Network [OSTI]

    Lesikar, Bruce J.

    2008-10-23T23:59:59.000Z

    Soil absorption fieldTwo-compartment septic tank Perforated pipe for effluent disposal Sand/loam soil Gravel Geotextile fabric Onsite wastewater treatment systems Operation and maintenance L-5347 8-08 Figure 1: A septic tank and soil absorption... field system. I f your home or business uses an onsite wastewater treatment system, common- ly known as a septic system, you need to know how to operate and maintain the system properly to prevent pollution and sewage backups. For many years, people...

  17. Remarkable insights into the paleoecology of the Avalonian Ediacaran macrobiota

    E-Print Network [OSTI]

    Liu, Alexander G.; Kenchington, Charlotte G.; Mitchell, Emily G.

    2014-12-04T23:59:59.000Z

    , and biological information. Final- ly, the use ofmodern ecologicalmetrics in the study of Ediacaran fossil assemblages is assessed. Concerns regard- ing the interpretation of paleoecological data are outlined in light of current taphonomic and sedimentological... several-kilometre- have not been convincingly demonstrated to be unique to paleosols. They contradict abundant data collected during decades of detailed sedimentological and geological research by numerous international au- thors (e.g. Misra, 1971; Benus...

  18. The crystal and molecular structure of [alpha]-maltose

    E-Print Network [OSTI]

    Takusagawa, Fusao; Jacobson, R. A.

    1978-01-01T23:59:59.000Z

    -09 (5) H2(C6') 142 (3) 779 (3) 1130 (6) . 3-5 - 5 4 (4) 877 (3) 510(6) 5-0 0-95 (6) H(Ol') 460 (4) 654 (3) 826 (6) 5-0 89 (4) 1047 (4) 476 (6) 5-0 0-99 (6) H(02') 289 (4) 517(3) 491 (6) 5-0 200 (4) 1171 (4) 809 (6) 5-0 0-93 (6) H(03') 94(4) 738 (4...-5,-y + 1-0,2-0-5 2-770 (4) 2-959 (4) 3-085 (4) 2-797 (4) 2-741 (4) 2-780(4) 2-707 (4) 2-850(4) 2-836 (4) 3-03 (2) 2-06 (5) 2-36 (5) 2-23 (5) 1-89 (5) 1-93 (4) 1-72 (5) 1-88 (6) 1-96 (5) 2-17(5) 169 (5) 124 (4) 160 (6) 162 (5) 165...

  19. 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.

    1987-01-01T23:59:59.000Z

    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.

  20. 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

    2015-01-01T23:59:59.000Z

    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...

  1. 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 [Advanced Science Institute, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198 (Japan); Bakule, Pavel [STFC, ISIS Facility, Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX (United Kingdom); Yokoyama, Koji [Advanced Science Institute, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198 (Japan); Advanced Meson Science Laboratory, RIKEN Nishina Center, RIKEN, Wako, Saitama 351-0198 (Japan); Ishida, Katsuhiko; Iwasaki, Masahiko [Advanced Meson Science Laboratory, RIKEN Nishina Center, RIKEN, Wako, Saitama 351-0198 (Japan)

    2011-09-15T23:59:59.000Z

    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.

  2. Peering through the holes: the far UV color of star-forming galaxies at z~3-4 and the escaping fraction of ionizing radiation

    E-Print Network [OSTI]

    Vanzella, E; Castellano, M; Grazian, A; Inoue, A K; Schaerer, D; Guaita, L; Zamorani, G; Giavalisco, M; Siana, B; Pentericci, L; Giallongo, E; Fontana, A; Vignali, C

    2015-01-01T23:59:59.000Z

    We aim to investigate the effect of the escaping ionizing radiation on the color selection of high redshift galaxies and identify candidate Lyman continuum (LyC) emitters. The intergalactic medium prescription of Inoue et al.(2014) and galaxy synthesis models of Bruzual&Charlot (2003) have been used to properly treat the ultraviolet stellar emission, the stochasticity of the intergalactic transmission and mean free path in the ionizing regime. Color tracks are computed by turning on/off the escape fraction of ionizing radiation. At variance with recent studies, a careful treatment of IGM transmission leads to no significant effects on the high-redshift broad-band color selection. The decreasing mean free path of ionizing photons with increasing redshift further diminishes the contribution of the LyC to broad-band colors. We also demonstrate that prominent LyC sources can be selected under suitable conditions by calculating the probability of a null escaping ionizing radiation. The method is applied to a s...

  3. Clustering and lifetime of Lyman Alpha Emitters in the Epoch of Reionization

    E-Print Network [OSTI]

    Hutter, Anne; Müller, Volker

    2015-01-01T23:59:59.000Z

    We calculate Lyman Alpha Emitter (LAE) angular correlation functions (ACFs) at $z\\simeq6.6$ and the fraction of lifetime (for the 100 Myrs preceding $z\\simeq6.6$) galaxies spend as Lyman Break Galaxies (LBGs) with/without Lyman Alpha (Ly\\alpha) emission using a model that combines SPH cosmological simulations (GADGET-2), dust attenuation and a radiative transfer code (pCRASH). The ACFs are a powerful tool that significantly narrows the 3D parameter space allowed by LAE Ly$\\alpha$ and UV luminosity functions (LFs) alone. With this work, we simultaneously constrain the escape fraction of ionizing photons $f_{esc}=0.05-0.5$, the mean fraction of neutral hydrogen in the intergalactic medium (IGM) $\\leq 0.01$ and the dust-dependent ratio of the escape fractions of Ly$\\alpha$ and UV continuum photons $f_\\alpha/f_c=0.6-1.2$. Our results show that reionization has the largest impact on the amplitude of the ACFs, and its imprints are clearly distinguishable from those of $f_{esc}$ and $f_\\alpha/f_c$. We also show that...

  4. 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 [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States); Stern, Daniel [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Dickinson, Mark [National Optical Astronomy Observatory, Tucson, AZ (United States); Pirzkal, Norbert; Grogin, Norman; Koekemoer, Anton; Peth, Michael A. [Space Telescope Science Institute, Baltimore, MD (United States); Spinrad, Hyron [University of California, Berkeley, CA (United States); Reddy, Naveen [University of California, Riverside, CA (United States); Hathi, Nimish [Observatories of the Carnegie Institution of Washington, Pasadena, CA (United States); Budavari, Tamas [Johns Hopkins University, Baltimore, MD (United States); Ferreras, Ignacio [Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT (United Kingdom); Gardner, Jonathan P. [NASA Goddard Space Flight Center, Astrophysics Science Division, Observational Cosmology Laboratory, Code 665, Greenbelt, MD 20771 (United States); Gronwall, Caryl [Department of Astronomy and Astrophysics, and Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802 (United States); Haiman, Zoltan [Columbia University, New York, NY (United States); Kuemmel, Martin [Universitaets-Sternwarte Muenchen, Scheinerstr. 1, D-81679 Muenchen (Germany); Meurer, Gerhardt, E-mail: James.Rhoads@asu.edu [International Centre for Radio Astronomy Research, University of Western Australia, M468, 35 Stirling Highway, Crawley, WA 6009 (Australia); and others

    2013-08-10T23:59:59.000Z

    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.

  5. Lyman-alpha Absorption from Heliosheath Neutrals

    E-Print Network [OSTI]

    Brian E. Wood; Vladislav V. Izmodenov; Jeffrey L. Linsky; Yury G. Malama

    2006-11-30T23:59:59.000Z

    We assess what information HST observations of stellar Ly-alpha lines can provide on the heliosheath, the region of the heliosphere between the termination shock and heliopause. To search for evidence of heliosheath absorption, we conduct a systematic inspection of stellar Ly-alpha lines reconstructed after correcting for ISM absorption (and heliospheric/astrospheric absorption, if present). Most of the stellar lines are well centered on the stellar radial velocity, as expected, but the three lines of sight with the most downwind orientations relative to the ISM flow (Chi1 Ori, HD 28205, and HD 28568) have significantly blueshifted Ly-alpha lines. Since it is in downwind directions where heliosheath absorption should be strongest, the blueshifts are almost certainly caused by previously undetected heliosheath absorption. We make an initial comparison between the heliosheath absorption and the predictions of a pair of heliospheric models. A model with a complex multi-component treatment of plasma within the heliosphere predicts less absorption than a model with a simple single-fluid treatment, which leads to better agreement with the data. Finally, we find that nonplanetary energetic neutral atom (ENA) fluxes measured by the ASPERA-3 instrument on board Mars Express, which have been interpreted as being from the heliosheath, are probably too high to be consistent with the relative lack of heliosheath absorption seen by HST. This would argue for a local interplanetary source for these ENAs instead of a heliosheath source.

  6. Iron and Nickel Line Diagnostics for the Galactic Center Diffuse Emission

    E-Print Network [OSTI]

    Katsuji Koyama; Yoshiaki Hyodo; Tatsuya Inui; Hiroshi Nakajima; Hironori Matsumoto; Takeshi Go Tsuru; Tadayuki Takahashi; Yoshitomo Maeda; Noriko Yamazaki; Hiroshi Murakami; Shigeo Yamauchi; Yohko Tsuboi; Atsushi Senda; Jun Kataoka; Hiromitsu Takahashi; Stephen S Holt; Gregory V Brown

    2006-09-08T23:59:59.000Z

    We have observed the diffuse X-ray emission from the Galactic center (GC) using the X-ray Imaging Spectrometer (XIS) on Suzaku. The high-energy resolution and the low-background orbit provide excellent spectra of the GC diffuse X-rays (GCDX). The XIS found many emission lines in the GCDX near the energy of K-shell transitions of iron and nickel. The most pronounced features are FeI K alpha at 6.4 keV and K-shell absorption edge at 7.1 keV, which are from neutral and/or low ionization states of iron, and the K-shell lines at 6.7 keV and 6.9 keV from He-like (FeXXV K alpha) and hydrogenic (FeXXVI Ly alpha) ions of iron. In addition, K alpha lines from neutral or low ionization nickel (NiI K alpha) and He-like nickel (NiXXVII K alpha), and FeI K beta, FeXXV K beta, FeXXVI Ly beta, FeXXV K gamma and FeXXVI Ly gamma are detected for the first time. The line center energies and widths of FeXXV K alpha and FeXXVI Ly alpha favor a collisional excitation (CE) plasma for the origin of the GCDX. The electron temperature determined from the line flux ratio of FeXXV K alpha / FeXXV K beta is similar to the ionization temperature determined from that of FeXXV K alpha /FeXXVI Ly alpha. Thus it would appear that the GCDX plasma is close to ionization equilibrium. The 6.7 keV flux and temperature distribution to the galactic longitude is smooth and monotonic,in contrast to the integrated point source flux distribution. These facts support the hypothesis that the GCDX is truly diffuse emission rather than the integration of the outputs of a large number of unresolved point sources. In addition, our results demonstrate that the chemical composition of Fe in the interstellar gas near the GC is constrained to be about 3.5 times solar.

  7. Two-photon transitions in primordial hydrogen recombination

    E-Print Network [OSTI]

    Christopher M. Hirata

    2008-05-20T23:59:59.000Z

    The subject of cosmological hydrogen recombination has received much attention recently because of its importance to predictions for and cosmological constraints from CMB observations. While the central role of the two-photon decay 2s->1s has been recognized for many decades, high-precision calculations require us to consider two-photon decays from the higher states ns,nd->1s (n>=3). Simple attempts to include these processes in recombination calculations have suffered from physical problems associated with sequences of one-photon decays, e.g. 3d->2p->1s, that technically also produce two photons. These correspond to resonances in the two-photon spectrum that are optically thick, necessitating a radiative transfer calculation. We derive the appropriate equations, develop a numerical code to solve them, and verify the results by finding agreement with analytic approximations to the radiative transfer equation. The related processes of Raman scattering and two-photon recombination are included using similar machinery. Our results show that early in recombination the two-photon decays act to speed up recombination, reducing the free electron abundance by 1.3% relative to the standard calculation at z=1300. However we find that some photons between Ly-alpha and Ly-beta are produced, mainly by 3d->1s two-photon decay and 2s->1s Raman scattering. At later times these photons redshift down to Ly-alpha, excite hydrogen atoms, and act to slow recombination. Thus the free electron abundance is increased by 1.3% relative to the standard calculation at z=900. The implied correction to the CMB power spectrum is neligible for the recently released WMAP and ACBAR data, but at Fisher matrix level will be 7 sigma for Planck. [ABRIDGED

  8. A FAST FLARE AND DIRECT REDSHIFT CONSTRAINT IN FAR-ULTRAVIOLET SPECTRA OF THE BLAZAR S5 0716+714

    SciTech Connect (OSTI)

    Danforth, Charles W.; Nalewajko, Krzysztof; France, Kevin; Keeney, Brian A., E-mail: danforth@casa.colorado.edu [CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, 389-UCB, Boulder, CO 80309 (United States)

    2013-02-10T23:59:59.000Z

    The BL Lacertae object S5 0716+714 is one of the most studied blazars on the sky due to its active variability and brightness in many bands, including very-high-energy gamma rays. We present here two serendipitous results from recent far-ultraviolet spectroscopic observations by the Cosmic Origins Spectrograph onboard the Hubble Space Telescope (HST). First, during the course of our 7.3 hr HST observations, the blazar increased in flux rapidly by {approx}40% (-0.45 mag hr{sup -1}) followed by a slower decline (+0.36 mag hr{sup -1}) to previous FUV flux levels. We model this flare using asymmetric flare templates and constrain the physical size and energetics of the emitting region. Furthermore, the spectral index of the object softens considerably during the course of the flare from {alpha}{sub {nu}} Almost-Equal-To -1.0 to {alpha}{sub {nu}} Almost-Equal-To -1.4. Second, we constrain the source redshift directly using the {approx}30 intervening absorption systems. A system at z = 0.2315 is detected in Ly{alpha}, Ly{beta}, O VI, and N V and defines the lower bound on the source redshift. No absorbers are seen in the remaining spectral coverage (0.2315 < z {sub Ly{alpha}} {approx}< 0.47) and we set a statistical upper bound of z < 0.322 (95% confidence) on the blazar. This is the first direct redshift limit for this object and is consistent with literature estimates of z = 0.31 {+-} 0.08 based on the detection of a host galaxy.

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

    E-Print Network [OSTI]

    Brenda Frye; Tom Broadhurst; Narciso Benitez

    2001-12-04T23:59:59.000Z

    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.

  10. H{alpha} ABSORPTION IN TRANSITING EXOPLANET ATMOSPHERES

    SciTech Connect (OSTI)

    Christie, Duncan; Arras, Phil; Li Zhiyun, E-mail: dac5zm@virginia.edu, E-mail: pla7y@virginia.edu, E-mail: zl4h@virginia.edu [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States)

    2013-08-01T23:59:59.000Z

    Absorption of stellar H{alpha} by the upper atmosphere of the planet HD 189733b has recently been detected by Jensen et al. Motivated by this observation, we have developed a model for atomic hydrogen in the n = 2 state and compared the resulting H{alpha} line profile to the observations. The model atmosphere is in hydrostatic balance, as well as thermal and photoionization equilibrium. Collisional and radiative transitions are included in the determination of the n = 2 state level population. We find that H{alpha} absorption is dominated by an optical depth {tau} {approx} 1 shell, composed of hydrogen in the metastable 2s state that is located below the hydrogen ionization layer. The number density of the 2s state within the shell is found to vary slowly with radius, while that of the 1s state falls rapidly. Thus while the Ly{alpha} absorption, for a certain wavelength, occurs inside a relatively well defined impact parameter, the contribution to H{alpha} absorption is roughly uniform over the entire atomic hydrogen layer. The model can approximately reproduce the observed Ly{alpha} and H{alpha} integrated transit depths for HD 189733b by using an ionization rate enhanced over that expected for the star by an order of magnitude. For HD 209458b, we are unable to explain the asymmetric H{alpha} line profile observed by Jensen et al., as the model produces a symmetric line profile with transit depth comparable to that of HD 189733b. In an appendix, we study the effect of the stellar Ly{alpha} absorption on the net cooling rate.

  11. Chemical Enrichment at High Redshifts

    E-Print Network [OSTI]

    Snigdha Das; Pushpa Khare

    1998-08-09T23:59:59.000Z

    We have tried to understand the recent observations related to metallicity in Ly $\\alpha$ forest clouds in the framework of the two component model suggested by Chiba & Nath (1997). We find that even if the mini-halos were chemically enriched by an earlier generation of stars, to have [C/H] $\\simeq$ -2.5, the number of C IV lines with column density $>10^{12} cm^{-2}$, contributed by the mini-halos, at the redshift of 3, would be only about 10% of the total number of lines, for a chemical enrichment rate of $(1+z)^{-3}$ in the galaxies. Recently reported absence of heavy element lines associated with most of the Ly $\\alpha$ lines with H I column density between $10^{13.5} cm^{-2}$ and $10^{14} cm^{-2}$ by Lu et al (1998), if correct, gives an upper limit on [C/H]=-3.7, not only in the mini-halos, but also in the outer parts of galactic halos. This is consistent with the results of numerical simulations, according to which, the chemical elements associated with the Ly $\\alpha$ clouds are formed in situ in clouds, rather than in an earlier generation of stars. However, the mean value of $7 \\times 10^{-3}$ for the column density ratio of C IV and H I, determined by Cowie and Songaila (1998) for low Lyman alpha optical depths, implies an abundance of [C/H] =-2.5 in mini-halos as well as in most of the region in galactic halos, presumably enriched by an earlier generation of stars. The redshift and column density distribution of C IV has been shown to be in reasonable agreement with the observations.

  12. Assisting immigrants and refugees to learn more about mental health,

    E-Print Network [OSTI]

    Sinnamon, Gordon J.

    AM 519-667-6640 cAnAdiAn MentAL HeALtH ASSociAtion 519-434-9191 cHiLdren'S MentALHeALtH criSiS intAMiLy ServicetHAMeSvALLey 519-433-0183 London & diStrictdiStreSS centre · criSiS reSPonSe Line 519-433-2023 1 illness like asthma, diabetes or heart disease. illnesses need medical attention. it's okay to ask

  13. Methods of predicting the weight of carcass roast and steak meat from easily obtainable carcass measurements

    E-Print Network [OSTI]

    Fitzhugh, Henry Allen

    1963-01-01T23:59:59.000Z

    MEASUREMENTS 152 HEREFORD STEERS AND 51 CROSSBRED STEERS 16 3. SIMPLE CORRELATIONS BET!&EN CARCASS MEASUREMENTS 152 HEREFORD S EERS. 17 4. PARTIAL CORRELATION COEFFICIENTS WITH CHILLED CARCASS WEIGHT HELD CONSTANT ? 152 HEREFORD STEERS. 19 5. PARTIAL... retail cuts by 1. 5 percent or sligh ly ?ore thtan otte percetdc& Leapt'cl ively. Furthermore, an tt 1 1 1' ~tt 1t 1 ~P; by 1' k (1960) 1t 6 an U. S. D. A, conclusion that the negative effect of fatness on carcass yield is approximately twice as great...

  14. Semen collection and evaluation from capuchin monkeys (Cebus apella) by electro-ejaculation

    E-Print Network [OSTI]

    Bush, Dale Edward

    1973-01-01T23:59:59.000Z

    . This species, Cebus ~a ella, because of its small size, (average 2 kg. ) is easier and more economical to maintain than the larger Old World primates, such as the common rhesus monkey, Macca mulatta. Cebus ~a ella tends to be somewhat more hardy than other... monkey. The small bipolar rectal probe was made of a plastic rod with 2 flat copper electrodes placed at opposite sides of the rounded tip of the rod. The probe was then inserted gently into the rectum while the monkey was ly'ng in an unrestrained...

  15. Cooperating for Cleaner Water

    E-Print Network [OSTI]

    Wythe, Kathy

    2006-01-01T23:59:59.000Z

    to date. TCEQ contracted with James Miertschin & Associates to develop the Leon River TMDL. The company is using a water quality model to mimic the hydrologic conditions on the impaired segment of the river. The Leon River Bacteria TMDL Advisory Group... water quality data during run-off events. Niemann said the TMDL report should be finalized by August 2006. After the TMDL is reviewed internal- ly and a public meeting held, then the TCEQ com- missioners and EPA will examine it for approval. Once...

  16. Methane adsorption on Devonian shales 

    E-Print Network [OSTI]

    Li, Fan-Chang

    1992-01-01T23:59:59.000Z

    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...

  17. Correlation of globe thermometer response and a YSI radiometer response

    E-Print Network [OSTI]

    Franknecht, Robert Howard

    1979-01-01T23:59:59.000Z

    in the steel 57 in i; try. -' The radian+ heat coiinponon* ivas a major part o' Lhls heat s Lice . = ex'oosrir'e. iclschl mca. sul d the radio. i+ hc t txt Ej xsi Ly with " "ell ov! prir;. ?, s inst ament-:: e*t erin' (v. l' " odcl 653 Radiometer... This investigation developed two regression equations relating measurements of radiant heat, air velocity, and dry bulb temperature to black globe temperatures. The radiant heat energy was controlled over the range of 200 to 2000 Joules/cm sec, as measured by a...

  18. The Cotton or Melon Louse: Life History Studies

    E-Print Network [OSTI]

    Paddock, F. B. (Floyd B.)

    1919-01-01T23:59:59.000Z

    (Portu-1 laen oleracea ) , and three seeded mercury ( Acolyph a virginica) . per- I grade listed also some plants which .have not been verified by later writ- ers as hosts of goss?jpii but are nom known to be hosts of other aphids. 1 Eurdock...~crmore, such an environinent was more natural for insect activities than it was possible to secure in the cages fornie~ly used for* this purpose. The cages were kept in the In- sectt~ry, shon~n in Plste 11, during the cooler portions of the year and during the extremely...

  19. Foucault's Ethics of Power

    E-Print Network [OSTI]

    Wolf, Kirk

    ­ cally remarks , there is no 'headquarters that presides over the rationality" of power (HSl 125). Rather, strategies of power are nonsubjective insofar as they arc anonymous and operate indepen­ dent ly of the part icular people who wil l ingly or unwi...Foucault's Ethics of Power Kirk Wolf Delia College 1. I n t r o d u c t i o n Since Foucaull 's death in 19K4, his interpreters have generally located his importance in his genealogical critiques and in his phi­ losophy ofpower. On the one hand...

  20. The McCoy List

    E-Print Network [OSTI]

    1989-01-01T23:59:59.000Z

    And Another Interphase The Other Side Of Paradise 81)82)87 KSX The Price And The Prize Eternal Triangle 81)82)83 Eternal Triangle 81)82)83 Odyssey 84)85 Fantasy Plak Tou The Kinship Alternate Universe Maine(ly) Trek 81 Tua-0imensianal Thinking Pegasus Alpha... 81)82)85)86 Off The Beaten Trek Rim Of Starlight Contact The Complete Rack Berengaria 88)810 Starfleet Chronicles Indian Summer And Other Seasons In A Different Reality 827 Alpha Touch Eternal Triangle 81)82 Lambard) Shirley Landers> Randall Landon...

  1. Ogmios 20

    E-Print Network [OSTI]

    Ostler, Nicholas D M

    2002-01-01T23:59:59.000Z

    the Kalahari .................... 1 1 6. Reports on Meetings .................. 12 Gaining Ground: Social, Cultural and Political Processes of Latin America's Indigenous Peoples, Liverpool Univ., 21- 22 Feb 2003.. ................................. .17... t fere ce ill take lace in r e, the estern edge f t e re te i erle area f stralia , t e t. . he fere ce hai.r is J se ly t e l @ plac .n t. . t ill e i t i i t i : , I tit t , l i at e a ere la a es' li s t t eir ela s. a c...

  2. No Holds Barred Issue 9

    E-Print Network [OSTI]

    Multiple Contributors

    2013-11-27T23:59:59.000Z

    with Death At some disputedbarricade... And I to my pledged wordamtrue, I shall notfail thatrendezvous. Alan Seeger, I Have a Rendezvous With Death Nicholas Knight laughed at one of Schanke's more outre jokes, and hung up the phone. It still amazed... ever bear. Nicholas had the face of an angel, usual ly very sweet and boyish, a permanent Bot ticelli creation. She tried to forget the other side of him, the ruthless, hungry animal that could transform him from man to vampire in a heartbeat...

  3. Fish Fingers and Custard Issue 2

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    they do, but boy aren’t they sexy?) Editor: Daniel Gee Contributors: Martin Marshall, Emma Donovan, Thomas Cookson, Grant Bull, Elizabeth Peloso, Richard Wiggins, Frank Collins, Patrick Riley, Tim Drury, Stephan Black, Thomas Spychalski, Steven...://www.cathoderaytube.blogspot.com) Photos by Tim Drury - http://bit.ly/proms2010photos Fish Fingers and Custard Issue 2 17 ALL THE TABLOID NEWSPAPER RUMOURS – ALL THE TIME Matt Smith Is Rubbish And Is Getting Sacked Doctor Who fans have seemingly got their way. A bloke I...

  4. Storage and Diseases of the Sweet Potato in Texas.

    E-Print Network [OSTI]

    Youngblood, B. (Bonney)

    1919-01-01T23:59:59.000Z

    of the building from rain or snow. The ,, ening into tlle cupoia is con- trolled by means of doors in the ceiling of tl~e house (Fig. 16). FLUE AND STOVE. Another distinct and important fcature of this house is the ~~LIIUU of heating and air circulation, which... ;s acacomplished by means of a stove and flue (Figs. 12, 15, 20, 33). This is rea!ly an adaptation from the modern system of heati~g schoolhouses. TLs features of this eys- tem of heating is an opening under the stove, throngh which the out- door...

  5. Responses of yaupon and associated vegetation to burning, herbicidal application and phosphate fertilization 

    E-Print Network [OSTI]

    Avant, Herman Dale

    1960-01-01T23:59:59.000Z

    belov mmcbmm yro&act1vitf of forage sa& livestoch bcesase of the presence of an&esirsble her&ace& sn& brash cover. The Esst Torso Post Osh Salt, characteristic of ssndf sa& ms&ion tezhmeC soils, Sells iato this category. This area i, s compose& of X1... malbamrjr. Reer ly three foarths of this region ie ace& for livestoch range, although the nature sn& &eositf of the aoo&r syecies greatly re&uces Che economic returns. Xn the psst few peers, selective herbicide have ms&e it I...

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

    E-Print Network [OSTI]

    Kitson-MimMack, Joy Joan

    1988-01-01T23:59:59.000Z

    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...

  7. Discovery of a Giant Lya Emitter Near the Reionization Epoch

    SciTech Connect (OSTI)

    Ouchi, Masami; Ono, Yoshiaki; Egami, Eiichi; Saito, Tomoki; Oguri, Masamune; McCarthy, Patrick J.; Farrah, Duncan; Kashikawa, Nobunari; Momcheva, Ivelina; Shimasaku, Kazuhiro; Nakanishi, Kouichiro; Furusawa, Hisanori; Akiyama, Masayuki; Dunlop, James S.; Mortier, Angela M.J.; Okamura, Sadanori; Hayashi, Masao; Cirasuolo, Michele; Dressler, Alan; Iye, Masanori; Jarvis, Matt.J.

    2008-08-01T23:59:59.000Z

    We report the discovery of a giant Ly{alpha} emitter (LAE) with a Spitzer/IRAC counterpart near the reionization epoch at z = 6.595. The giant LAE is found from the extensive 1 deg{sup 2} Subaru narrow-band survey for z = 6.6 LAEs in the Subaru/XMM-Newton Deep Survey (SXDS) field, and subsequently identified by deep spectroscopy of Keck/DEIMOS and Magellan/IMACS. Among our 207 LAE candidates, this LAE is not only the brightest narrow-band object with L(Ly{alpha}) = 3.9 {+-} 0.2 x 10{sup 43} erg s{sup -1} in our survey volume of 10{sup 6} Mpc{sup 3}, but also a spatially extended Ly{alpha} nebula with the largest isophotal area whose major axis is at least {approx_equal} 3-inches. This object is more likely to be a large Ly{alpha} nebula with a size of {approx}> 17-kpc than to be a strongly-lensed galaxy by a foreground object. Our Keck spectrum with medium-high spectral and spatial resolutions suggests that the velocity width is v{sub FWHM} = 251 {+-} 21 km s{sup -1}, and that the line-center velocity changes by {approx_equal} 60 km s{sup -1} in a 10-kpc range. The stellar mass and star-formation rate are estimated to be 0.9-5.0 x 10{sup 10}M{sub {circle_dot}} and > 34 M{sub {circle_dot}}yr{sup -1}, respectively, from the combination of deep optical to infrared images of Subaru, UKIDSS-Ultra Deep Survey, and Spitzer/IRAC. Although the nature of this object is not yet clearly understood, this could be an important object for studying cooling clouds accreting onto a massive halo, or forming-massive galaxies with significant outflows contributing to cosmic reionization and metal enrichment of inter-galactic medium.

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

    E-Print Network [OSTI]

    Hayes, Tracey Michelle

    2004-01-01T23:59:59.000Z

    lifb-long spokesman for a future alliance. This alliance created a critical shitt in the international balance of po?cr as 4rcat Britain ?as in decline and the IJnited States and Russia ?ere in the transitional phase of becoming the hegemonic po... ii dram;itic shift ol' hegemon&c powers. Dunng this mercurial tl&1&e the miijor p&?iers -- German). France, Russia, United St;&tcs. and J;if&ala ? were;ill coinpeting on thc global stiigc, vlo?ly but steadily rcphic&ng C&re;&t IJr&tain*s long...

  9. Swine as an alternative enterprise: Mixed Soils Area of West Texas

    E-Print Network [OSTI]

    Masch, William Ray

    1970-01-01T23:59:59.000Z

    Directed by: Dr. D. F. . Farris Operators of irrigated farms in the Hixed Soils Area of tJest Texas face a very serious decline of Che underground water supply. As this decline conCinues alt. amative crop and/or livestock enter- prises tu s... important change in these cost and/or prier-s would affect swine's contribution to net famn income. ACKNOWLEDGEHENTS I am espccia1. ly indebted to Dr. D, E, Farris, chairman nf my advisory co smittee, for bis guidencr and assistance in the develop- ment...

  10. Elastic and Inelastic Scattering of Alpha-Particles and Protons from Sm-144

    E-Print Network [OSTI]

    Barker, J. H.; Hiebert, John C.

    1971-01-01T23:59:59.000Z

    PH YSICA L REVIEW C VOLUME 4, NUMB ER 6 DECEMBER 1971 Elastic and Inelastic Scattering of o. Particles and Protons from Sm~ J. H. Barker* and J. C. Hiebert Texas ARM University, College Station, Texas 77843 (Received 14 June 1971) Differential... cross sections for the elastic scattering and inelastic scattering to the low-ly- ing states in Sm have been measured using 50-MeV e-particle and 30-MeV proton beams from the Texas ASM variable-energy cyclotron. Spin and parity assignments are checked...

  11. Public Speaking 4-H Style

    E-Print Network [OSTI]

    Hall, Gayle

    1999-12-03T23:59:59.000Z

    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. The audience will wait; they have come to hear you. After you have adjusted...

  12. Electron-Transport in Calcium-Based Metallic Glasses

    E-Print Network [OSTI]

    Naugle, Donald G.; DELGADO, R.; ARMBRUSTER, H.; TSAI, CL; CALLAWAY, TO; REYNOLDS, D.; MORUZZI, VL.

    1986-01-01T23:59:59.000Z

    . Comparison of results from electronic-structure calculations for CaAl, Ca3A1, CaGa, and Ca3Ga alloys in a dose-packed crystalline structure with experiment indicates that the Ca d band may dominate the electron-transport properties of these glassy metals.... I. INTRODUCTION Considerable progress has b n made in the understand- ing of the electrical properties of glassy metals, particular- ly those whose constituents are simple metals. Generally the resistivity values for simple metal glassy alloys...

  13. Hall-Coefficient and Resistivity of Amorphous Ti1-Xalx Films

    E-Print Network [OSTI]

    RATHNAYAKA, KDD; HENNINGS, BD; Naugle, Donald G.

    1993-01-01T23:59:59.000Z

    . INTRODUCTION The Hall coefficients of amorphous metals are general- ly positive when the alloy is dominated by an early- transition-metal component. (See reviews by Howson and Gallager, ' Mizutani, Naugle, and Naugle and Rhie. ) This has been thoroughly... investigated for early- transition-metal ?late-transition-metal (ETM-LTM) al- loys. The Zr-based amorphous alloys [Zr-Cu, ' Zr-Ni, Zr-Co, ' Zr-Fe (Refs. 8 and 11)] compose one of the most completely studied ETM-LTM alloy system. As the composition...

  14. The effect of injection hole geometry on flat plate film cooling and heat transfer

    E-Print Network [OSTI]

    Madsen, Eric Perry

    1994-01-01T23:59:59.000Z

    conducted at 50 000 Reynolds number , wi th bo th a ir and C02 inject ion and at f our b lowing ratios for r\\ and a l l five b lowing ratios for h . Each slot con f igurat ion was designed to give a total cross-sectional area equal to that of the holes... Averaged Heat Trans fer Coeff icient Ratio for 45? Hole Injection 20 approx imate ly 1.05. In contrast to 0? hole injection, 45? hole inject ion projects a larger cross-sect ional area to the mainf low, wh i ch results i n h igher turbu lence...

  15. The Texas strain of Hepatozoon Canis: an overview

    E-Print Network [OSTI]

    Mercer, Susan Hope

    1987-01-01T23:59:59.000Z

    infected neutrophils was a modification of the naphthol-ASD-chloroacetate esterase stain. As indicated by D ly t 1 (14) ' 'H~to** t f* t*d k differentiation between the infected and noninfected neutrophil was observed by the absence of red granular..., J. J. , NcDaniel, R. C. , Townsend, K. W. a Calhoun, Jr. , C. H. 1984. Alterations in the plasma membranes of ~Hto -' 2* t 0 k yth yt '0 hy drfferential staining. J. Parasitt 8 70:151-153. 15. Davis, D. S. , Robinson, R. N. a Craig, T. N. 1978...

  16. So You Want to Start a Home-Based Business in Texas

    E-Print Network [OSTI]

    Brown, Pamela J.; Clary, Gregory M.; White, Lynn

    1999-09-16T23:59:59.000Z

    Marketing Association http://www.ama.org/ USDA Publications and Data through Cornell University http://usda.mannlib.cornell.edu/ Yahoo - Business and Economy: Small Business Information http://www.yahoo.com/Business/ Small_Business_Information/ (World Wide... be anticipated, while others may come com- pletely by surprise. n How flexible will you and your fami- ly be in dealing with the various demands of the business? n How will you and your family deal with business expansion and its encroachment on family space...

  17. Specification buying as it relates to private brand merchandising

    E-Print Network [OSTI]

    Tarver, Cleo B

    1964-01-01T23:59:59.000Z

    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...- tegic position ocoupied by the wholesaler, For many years pri. or to the Civil Var and especially during the Recon- struction period following the Var, the control of sales usually rested with the wholesaler who dominated the scene as financier...

  18. A decision procedure for determination of convective precipitation with implications on cumulus cloud modification

    E-Print Network [OSTI]

    Martens, James Donovan

    1972-01-01T23:59:59.000Z

    temperature - 700-mb temperature level of maximum wind 700-mb dew-point depression 0. 5108 0. 4542 0. 3649 0. 3474 0. 2903 0. 2859 0. 2479 0. 2182 0. 2177 0. 2007 0. 1856 0. 1556 0. 1256 0. 0545 0. 0538 0. 0227 0. 0165 Table ld. Correlation... / 4 6 8 10 12 14 16 18 20 22 24 700. 6 de -point depr cero ('C. ) Fig. 3n. Frequency distributions for 700-mb dew-point depression. 38 April 30 ? June 17 J ne 18 ? J ly 30 April 30 ? July 30 e nv 5 a II C 0 1D\\ 130 155 180 205 230 255 280...

  19. A pseudo three-dimensional convection model

    E-Print Network [OSTI]

    Jenkins, Edwin Wayne

    1976-01-01T23:59:59.000Z

    (2) (3) hu hv Lw Wx hy dz (5) The variables u, v, and w are, respectively, the components of' motion in the x, y, z directions. The variable, p, is the ratio of' pressure to the density, b is buoyancy, and F( ) is f'ric*ion. ly defined as $2... The derivatives bu/by, hw/by, bb/by can be treated as new variables u . w , b for which new independent equations y v y are needed. For example, the equation ? (u ) = -u ? (u ) -w ? (u ) -v~ (u ) hu hu y dx y hz y hy y hy bx ) + ? (E) (7) hv hu hw hu dy dy hy...

  20. Analyses of Commercial Fertilizers Sold during 1956-57.

    E-Print Network [OSTI]

    Fudge, J. F.

    1957-01-01T23:59:59.000Z

    part of potash. Consequent- ly, this fertilizer has a 1-2-1 ratio; other grades having this ratio include 6-12-6, 10-20-10 and 12-24-12. The grades of mixed farm fertilizers sold in Texas have been limited in number for more than 30 years... to 12-6-6. 3. Continued the minimum approved con- centration of 20 units in two-component mixed goods containing nitrogen and available phosphoric acid. 4. Beginning September 1, 1958, the min- imum approved concentration of three- component mixed...

  1. Application of functional transformations in the solution of steady-state distillation problems

    E-Print Network [OSTI]

    McLaughlin, Blaise Edward

    1986-01-01T23:59:59.000Z

    12. 13. 16. 17. 19. 20. RESULTS OF EXAMPLE 7 - CHANGE IN FUNCTION NORM AND STAGE 1 TEMPERATURE WITH RESPECT TO 3 ACOBIAN EVALUATION (ITERATE 2, 8=2. 2x10, Ly=50 LB-MOLES/MIN) RESULTS OF EXAMPLE 7 - CHANGE IN FUNCTION NORM AND STAGE 1... EVALUATION (ITERATE 1, P=2. 2x10, Lx;=40 LB-MOLES/MIN) RESULTS OF EXAMPLE 7 ? CHANGE IN FUNCTION NORM AiND STAGE 1 TEMPERATURE WITH RESPECT TO J ACOBIAN EVALUATION (ITERATE 1, , 8=0. 124, Li, =40 LB-MOLES /MIN) RESULTS OF EXAMPLE 7 - CHANGE IN FUNCTION...

  2. Ecology, biology, and coexistence of four species of Aradidae from the southeastern United States

    E-Print Network [OSTI]

    Taylor, Steven Joseph

    1987-01-01T23:59:59.000Z

    " is characterized by wood which is starting to rot and can be peeled off with a knife. Fungus growth is clear ly present under the bark and tunnels made by beetles are present. Temperature and moisture in subcortical spaces of trees at this stage is variable...) showed that millipedes found in association with dead logs partition the habitat into microhabitats by their location on, in, or under the log. Four species of bark beetles (Coleoptera: Scolytidae) have been shown to partition trees by colonizing them...

  3. Miscellaneous Analyses.

    E-Print Network [OSTI]

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

    1895-01-01T23:59:59.000Z

    . The am ount o f c lay in the ? black w axy" is shown by tlie con ten t Of alum ina to be greater than that in tlie sandy loam . T lie soil from E l Paso was selected from a field in tended for the grow th of fru it trees. CLAYS. The exam... ination o f these was made for a com pany that expected to ex trac t the m etal a lum inum from clay . Complete analyses were made in on ly a few eases; since the alum ina and lim e were the two principal in ? gred ien ts wanted , other...

  4. A study on the adsorbability characteristics of unsaturated fatty acids

    E-Print Network [OSTI]

    Williams, William Thomas

    1951-01-01T23:59:59.000Z

    tatty acids (AOy39) ~ The triglycerides vere least adsorbed, ut in re: 'ral it wns found that alumina adsorbs the c-&asti tuerts of high molecular weight while the reverse ts tz. !e of silica eel, and that &. atter separation is obta'ncd?ith aluz... of the solven? nnd the solute, "-'he 'fiselius method is also completely independent of the color oi' the adsorbent, thus allow&n;? thc use of &ctive &. arbon which seems to !?e espeoio. !ly suite! lc for &sany senarations, ':han-es in c 'ncontration of thc...

  5. Sealing Ponds and Lakes with Bentonite

    E-Print Network [OSTI]

    Lesikar, Bruce J.

    2003-04-01T23:59:59.000Z

    of 1 pound per square foot will require two bags of 50 pounds each in each square (each square contains 100 square feet). Large ponds or lakes may require the bentonite to be delivered to the site in bulk quantities. Spread the bentonite even- ly over... of Bentonite to Use The amount of bentonite required to effectively reduce seepage losses from a pond or lake varies from 1 to 2 pounds per square foot of soil surface. One-half pound of bentonite per square foot of soil is usually satisfactory when the bottom...

  6. An economic analysis of the welfare crisis in Texas

    E-Print Network [OSTI]

    Ledbetter, Harry Laughlin

    1972-01-01T23:59:59.000Z

    : The caseload data is in the Department of Public Idlf '*~AIR, RI1 d, f 6 f'. ly. 1'6 medical expenditures are reported in the Department's Annual 1'~lf *d "S. y fNd'1A. '. . Rpd'? tures" May 28, 1971, Kerr-Mill mas enacted in fiscal 1962. " *Estimated... finance issues has been a great help to me on numerous occasions. I am very gzateful to Mr, Thomas M Keel, Director of the Legislative Budget Board, for without his encouragement and support this thesis would never have been completed. I can never...

  7. 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

    1974-01-01T23:59:59.000Z

    - 49 mm used Acartia tones, nauplii, insects, algae, and invertebrate eggs, with the 50 mm and larger fish switching to a diet of mostly insects and insect larvae. Both species demonstrated late morning pl 1 f dig tiy, h, lyM. ~bllt dtplyd... of most common food items by length class for M. martinica 20-49 mm. 18 Percent frequency of occurrence and average gut content for most common food items by length class for M. martinica 50-79 mm. 20 Percent frequency of occurrence (%) and average...

  8. Equilibria in trialkylarsine oxide-iodine solutions

    E-Print Network [OSTI]

    Kolar, Frank Lee

    1966-01-01T23:59:59.000Z

    prepared as described by' Zingaro and Meri)anian. A~M 'tn . A Beohnenn DR-1 do ble been reoordtnd spectrophotometer with a thermostatically controlled (+ 0. 1'C. ) cell compartment. B 1 tio ~P'tto . 1 p *te t the **t n ly hygroscopic arsine oxides.... Xamai and B. D. Chernokal'skii, Tr. Xazansk. Khim. Tekhnol. Inst. , 26, 117 (195+9 (k) A. Meri)anlan and R. A. Zingaro, ~Incr . Chem. , 5, 187 (1966) 2. F. Schindler, H. Schmidbaur, and G. Jones, A~n ew. Chem. , 77, 170 (1965). J. Lewis, R. S. Nyholm...

  9. Rainwater Harvesting

    E-Print Network [OSTI]

    Crawford, Amanda

    2005-01-01T23:59:59.000Z

    and used on-site. Distribution systems channel the captured rainwater to holding areas. The roof of a building or home is one common- ly used catchment. The bigger the roof, the larger the volume of water collected. Gravity then naturally directs... rainwater harvesting system, Texans can easily get through the dry periods of the year without the need for additional water. Each year, irrigation accounts for 30 percent to 50 percent of Texas urban water use, averaging 20 gallons of water per square...

  10. The influence of different site preparation methods on natural regeneration of bottomland hardwoods

    E-Print Network [OSTI]

    Morrissey, Jon Terry

    1983-01-01T23:59:59.000Z

    such as sweetgum and black 1 t (Rh(. ' P d 1. L. ) h' h P d g t tl ly W dl of parent tree size (Kellison et al. 1981). The size of clearcut openings will often determine the species regen- erated and will have an effect on growth. Circular openings of 1/2-acre... cutting is a method of harvest-regeneration that theoreti- cally favors reproduction of wind-disseminated seed species. This regener- ation method appears unsuitable for southern hardwood management because seed trees have a minimal influence...

  11. Trace fossil assemblages in selected shelf sandstones

    E-Print Network [OSTI]

    Locke, Kathleen Ann

    1983-01-01T23:59:59.000Z

    and decreasing marine 1nfluence. Individual trace fossil types are more abundant and show a greater d1versity 1n the delta-margin facies; several large, vert1cal crab(?) burrows are P ascot a d th bi g is do 1 t d by ~Ohio o h In the shelf sequences, mostly... ~Zoo h os, f d ly i th iddl -to. outer and outer shelf sequences. Continued study of trace fossils should provide more specific information than the general shelf locations described above. ACKNOWLEDGEMENTS The completion of this thesis marks...

  12. Engineering properties of shallow sediments in West Delta and South Pass Outer Continental Shelf Lease Areas, offshore Louisiana

    E-Print Network [OSTI]

    Helwick, Sterling J

    1977-01-01T23:59:59.000Z

    , and sandy silt (WD024 1 WD028 ly WD029 1 WD029 2& WD029 3 1 1 These designations identify borehole locations. WD refers to West Delta OCS Lease Area, and SP refers to South Pass OCS Lease Area. The next three digits identify the number of the lease block... AREA SEDIMENTS IN DEPTH INTERVAL 2Ir50' 0-50 M 89'20' Fig. 4 ? General lithology of borehole sediments in the upper 50 m. The number next to each borehole location is used to distinguish boreholes located in the same lease block. 18 WD029-5, WD...

  13. The development of a planar multiwire proportional counter

    E-Print Network [OSTI]

    Hensley, John Richard

    1970-01-01T23:59:59.000Z

    140 THEORY 1. Proportional Counter Theory A proportional counter operates on the principle of using the ionization produced in a gas by a charged particle passing through it (or an x-ray stopping in it) to create an avalanche of secondari- ly... distance approximately equal to the beam width in figures 15 and 16, where x-rays were used. In figure 17, where alpha particles ivere completely stopping in the detector gas, the fall-off in efficiency occurs over a distance much greater than the 0. 82...

  14. The absurd hero in the novels of William Styron

    E-Print Network [OSTI]

    Smith, Ronald Arthur

    1969-01-01T23:59:59.000Z

    collap. -. e? Rising, streetcar, tour hours in the offi. oe or the factory. , meal, streetcar, Tous hours c ": lrork! II. e!1, elec&p, ancl Honda?Tuesdcrry Wednesday Thursday I!rida5- and. Satu 'clay according to the same r~lyIheI--this path is e si... ve also described his work as beix&g existential. John Howar&i Jawson f. z. "Styron: Darkness and Pire in. the Modern Novel" S discusses Styz'on's work as being within an "exi. sten- tiali st frame of reference. " Jha2: Ha san laas also mad...

  15. An investigation of the probability of occurrence of dry periods during the rainy season in the grassy highlands of Western Venezuela

    E-Print Network [OSTI]

    Quintana Gomez, Ramon Alfonso

    1983-01-01T23:59:59.000Z

    distribution can vary in relation to the local topography and the various synoptic factors. Therefore, in some areas, for a given storm, the rainfall may increase with altitude or be in the nature of a heavy convective deluge of very localized extent or any... that occur during the reading of the gauoe, recording of the data, and those happening while transm1tting the information. The personal errors involved here are generally reduced in the proper- ly operated system of the Division de Hidrometeorologia del...

  16. Nutritional and Feeding Management of Broodmares

    E-Print Network [OSTI]

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

    2005-04-13T23:59:59.000Z

    performance and abil i ty to moth er strong, healthy foals. Eco nom ic sur viv al often hinges on mares foaling early in the year, rebreeding quickly and nursing a grow ing foal that de vel ops sound- ly. While achiev ing these goals in a herd... of broodmares is dependent upon many factors, nutritional 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...

  17. Final report of the mark and recovery estimates of fish populations in three heated reservoirs of Texas

    E-Print Network [OSTI]

    Yeh, Chi Fu

    1971-01-01T23:59:59.000Z

    OF SCIENCE August 1971 Major Subject: Fisheries Science MARK Al;0 RECOVERY ESTIMATES OF FISH BPBiLATIOMS IK THINE HEATED HRSERVOIHS OF T~~ A Thesis CHI FU 'IM~ AFproved a. to style and content by: e s Dr. H. K. Strawn Chairman of' Committee H ad ot...& Dr. Kirk Strawn Estimates of fish populations in Lake Bastrop& Lake Nasvrorthy and North Lake, Texas were made by mark and recapture techniques. The lakes were divided into four, seven and, three strata respective- ly. Fish capt&u"od in each...

  18. Vertebrate survey of a dredge spoil salt marsh

    E-Print Network [OSTI]

    Lee, Betty Jo

    1976-01-01T23:59:59.000Z

    . . . . . , . ~ ~ ~ ~ ~ ~ 22 Ppl f. 1 t ph* f~S'd~hfdd Mus musculus from October, 1975 through March, 1976 on the Bolivar Peninsula study area, Texas. 24 Sex, reproductive state and age percentages in population pl f ~S' d ~htfd, 0 h, 1979 h Sh S* h. 1976 on the Bolivar... subordinant animals as a class. 9 t f . 1 pl ' 1, ~sd Soartina, Monarda, and Sesbania-Mixed Grass, were analysed for g ' p f hying' d . A ly ' f ' f h ~S'dppl 1 hd tg'f'diff f ppl density in the four plant communities (Table 7) . Duncan's multiple g...

  19. A uniform analysis of the Lyman alpha forest at z = 0-5: III. HST FOS Spectral Atlas

    E-Print Network [OSTI]

    Jill Bechtold; Adam Dobrzycki; Brenda Wilden; Miwa Morita; Jennifer Scott; Danuta Dobrzycka; Kim-Vy Tran; Thomas L. Aldcroft

    2001-11-27T23:59:59.000Z

    We analyzed the absorption line spectra of all quasars observed with the high resolution gratings of the Faint Object Spectrograph on board the Hubble Space Telescope. We examined 788 spectra for 334 quasars, and present line lists and identifications of absorption lines in the spectra of 271 of them. Analysis of the statistics of the Ly-alpha and metal absorption systems are presented in companion papers (Dobrzycki et al. 2001; Scott et al. 2001; Morita et al. 2001). The data and several analysis products are available electronically and on the authors' web site.

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

    E-Print Network [OSTI]

    Martin, Alcides Amilcar

    1963-01-01T23:59:59.000Z

    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...

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

    E-Print Network [OSTI]

    Boehme, Hollis Clyde

    1961-01-01T23:59:59.000Z

    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...

  2. Selected income tax problems of closely-held corporations

    E-Print Network [OSTI]

    Cunningham, Thomas Martin

    1952-01-01T23:59:59.000Z

    bah?a Lo ie lahioa for a?a?Lao? 4%IIOII%4o Xa ?X???LyI4I014 ao?$NNLiaaa Lho ?a?La ale 4ivilha?M Ql 145?L or ia party a?C it ia a??alia?a 4iffka?LL to 4L??aaoa hia aoa?X~ owebiaa ks y~m to tha ?awe@ af at?ah h?14 by ?a?he tho ~?L?aay ai11 1Qs?Ig ?a...

  3. Prophase I of spermatocytogenesis in the bull

    E-Print Network [OSTI]

    Treadwell, Margaret Anne

    1968-01-01T23:59:59.000Z

    of the other small, acrocentric chromosomes in +he 14 comp lem. . nt . There have been fewer studies concerri. ng the meiot ic chromosomes and the development of the germ cells in cattle, Investigati. ons of spermatogenesis, the complete development... or to this time. CPAi'TER II REVIEW, ' OF I. IfE!'AT1~8E One of the earlier discussions of spermatogenesis ws . given ly po &her, in 194~'. Using hi stological sections Bookc r made eneral observations of the appearance of the interstitial cells in testes...

  4. The Hall mobility measurement of Liquid Phase Epitaxy grown aluminum gallium arsenide

    E-Print Network [OSTI]

    Choi, Young-Shig

    1986-01-01T23:59:59.000Z

    -type AJGaAs mobility as a function of doping concentration with temperature as a, parameter. . 51 CHAPTER I INTRODUCTION AI?Ga& ?As (x is the mole fraction of Al) has been employed to fabricate discrete Light Emitting Diodes (LED) and Laser Diodes... grown l&y 1. PE are the lasers and light, -emitting diodes, 2, 31. 10 One limitation of the LPE technique is the difficulty of growing layers that differ in lattice constant by more than lv/& from the substrate. Lattice mismatch, occuring whenever...

  5. Channel Catfish Farming.

    E-Print Network [OSTI]

    Klussmann, Wallace

    1964-01-01T23:59:59.000Z

    dissolve. If it does not, add a little more of solution D and mix thoroughly. ., . slo.;ly 2C.1 ml, : Pour out part of the contents of this B.O.D. bottle and carefully down to the pencil line that marks 6. Fill the 1-cc. tuberculin syringe from... commercial operation. Oc- casionally, well water is very low in dissolved oxy- gen. Aerate it by passing it over a series of baffles or by using a spray system for introducing the water into the pond. Ideally, it should be possible to drain and refill a...

  6. Plant responses associated with adaptation to low nitrogen stresses in selected Cynodon cultivars

    E-Print Network [OSTI]

    Sifers, Samuel I.

    1986-01-01T23:59:59.000Z

    samples under each fertility rate. The sod plugs were transplanted as solid plugs into plastic pots 20 cm deep x 21 cm top diameter. Washed mortar sand, leached with distilled water, was used as the planting medium. The pH at the time of planting was 7...), which are practica1ly identical. The small percentage of nitrogen remaining in the plants probably represents refractory ti ssue ni tr ogen and woul d be unavai 1 able to sustain any future growth. No diseases were evident at the final observation...

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

    E-Print Network [OSTI]

    Martin, Alcides Amilcar

    1963-01-01T23:59:59.000Z

    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...

  8. Parasites of blackbuck antelope (Antilope cervicapra) in Texas and experimental transmission of gastrointestinal helminths from blackbuck to domestic ruminants

    E-Print Network [OSTI]

    Thornton, Jack Edwin

    1972-01-01T23:59:59.000Z

    900 0 800 210 1, 810 1, 100 N d' ~NN Bb. no. MF IF MM IM L4 Total 40 II 6, 920f III 3500 50 100 1, 600 40 12, 580f 1, 350f 20 20 10 0 200 7, 200 190 19, 610 10, 700 Bb. no. Tricholstron lus axei IF Total I 120 II 0 III 0 80 0... in the spring and summer of 1971 (Table I, blackbuck nos. 3, 4, 5 and 7). At this time the animals were crowded and on poor range but were receiving supplemental feed. Worm loads were, nevertheless, moderate- ly high. In the fall and winter of 1971 and early...

  9. Analyses of Commercial Fertilizers Sold during 1956-57. 

    E-Print Network [OSTI]

    Fudge, J. F.

    1957-01-01T23:59:59.000Z

    part of potash. Consequent- ly, this fertilizer has a 1-2-1 ratio; other grades having this ratio include 6-12-6, 10-20-10 and 12-24-12. The grades of mixed farm fertilizers sold in Texas have been limited in number for more than 30 years... to 12-6-6. 3. Continued the minimum approved con- centration of 20 units in two-component mixed goods containing nitrogen and available phosphoric acid. 4. Beginning September 1, 1958, the min- imum approved concentration of three- component mixed...

  10. Absorption, translocation and accumulation of arsenic in cotton and Johnsongrass as influenced by rate, surfactants, and time of application of methanearsonate herbicides

    E-Print Network [OSTI]

    Havelka, Ulysses Daniel

    1969-01-01T23:59:59.000Z

    . suppressed regrowth of Johnsongrass (So~rhum h 1 o (L. ) P . ) 'h t did *t 1* ly *ff. t y*. ttt (G~s ?1 hl ts L. ). DS!(X and It'. Si'L(A are the sodium salts of' methanearsonic acid. (Y~) ~ L)~ is a water-soluble pentavalent organic arsenical acid which...ABSOPPTION, TRANSLOCATIGN AND ACCUPiULATIGN OF ARSENIC IN COTTGN AND JOHNSONGRASS AS INFLUENCED BY RATE, SUPFACTAiNTS, AND TIiZ 0: APPLICATION GP FXTHANEARSONATE HERBICIDES A Thesis ULYSSES D. HAVZLKA Subaltt d to the Graduate Collepe...

  11. Comparison of various procedures for estimating microbiological populations of grade A raw milk

    E-Print Network [OSTI]

    Bogart, Dennis Lee

    1971-01-01T23:59:59.000Z

    . Prelirainary incubation oi the saaiples was helpful in detectii, g farrris w i th poor sanitation praci. ices wh "n the SPC of the saicple was & 50, 000/rcl. Johns et al. (29) reported that. a SPC-PI limit o- 250, 000/ml failed to detect farms... the saa!pl es at 20-?1 C for 1 6, 20, 24, and '40 hr, observing for off odors, "leather ly-like" fat, and gas . They reported highly significant (P & . 01) correlation coefficients for SPC, LPC, and CC versus keeping quality, and concluded that a...

  12. Maintenance Requirements of Chickens and the Effect of Age of Chickens on the Productive Energy of Feeds. 

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1944-01-01T23:59:59.000Z

    ?merits were calculated to the average weight of for the , the experiment, usually 3 weeks. The caloric productive energy consumed in the ration fed less the calories of energy stored in the chicken give the calories of productive energy used... used for maintenance, calories per day per 100 gram =100C + (11 13 X42) = D ... 7.18 Lc.Ab.4.. Layin; quiren chicke A,, ": rl LU1131U In I maintc caloric ._ly 37 grams of the ration per day and kilogram would be required for ntenance...

  13. Southern Enclave Issue 12

    E-Print Network [OSTI]

    1986-01-01T23:59:59.000Z

    and dad sometimes didn't tell them all the truth? Yes, that's a bit catty. But I am honestly puzzled. As for few people's favorite uncle, Marlene Karkoska asks why Owen lars takes the risk of luke's upbringing? If we go by the novelization, where..., but also Frank Herbert and editor Judy-Lynn Del Rey. (Incidental ly, she bought the novel STAR WARS a year before the film came out ... ) They will all be missed. ?~: Author L. Ron Hubbard also passed away recently.? I attended Boskone in February...

  14. Ecology of the Atlantic bottlenosed dolphin (Tursiops truncatus) in the Pass Cavallo area of Matagorda Bay, Texas

    E-Print Network [OSTI]

    Gruber, Jody Ann

    1981-01-01T23:59:59.000Z

    (1977), and Shane and Schmid- ly )7978) b r ed th t ~Tio folio d set 9 tte of o m t fo several days or weeks, after which they would abruptly adopt a new pattern. Social Composition Goups f' 200~Tsiosh b n dd ffth costi waters of Alabama... to the Peninsula bulkhead. Mean depth of Matagorda Bay is 3 to 4 m. The remaining 16. 5 km~ of the study site are conta1ned with1n an area of marshlands, mudflats and grassbeds, and small embayments. Two marshland channels, Saluria Bayou (6 to 12 m deep) and Big...

  15. Nepali Aawaz Volume 1, Issue 9, 24 January - 7 February 2006

    E-Print Network [OSTI]

    Shrestha, Kashish Das

    |:t'tLn] tkfO{x?nfO{ ;Gt'i6 kfg'{ d]/f] p2]Zo xf] eGb} lyP Æ . >j0f s'ln{Pgg, dlng : j/ / uDeL/} d'b|fdf Oltxf;nfO{ lwsfb}{ s'ln{Psf lj;] gurL{sf] jofg pgn] jfrg u/]kl5 >f]tfsf] tfnL u8u8fx6 ;'g]/ wGojfb lbb} d':s'/fP . slj s[i0f e'if0f jnn] hgtfsf] cfjfh...

  16. Cash flow analysis: a tool for the dairy farmer

    E-Print Network [OSTI]

    McMorrough, Mark D

    1985-01-01T23:59:59.000Z

    in the prices that they receive for their outputs. Interest rates, although down slightly from the 1981 peak, are at levels far above those experienced in the sixties and seventies. Even the weather has been an adversary of agriculture. Due to abnormally dry... TOTAL CASK AVAILASI. K Cash Re ulred: Feed Jsn. Feb. Narch April Nsy June July August Sept. October Nov. ec. 101AL 12 13 14 15 16 ly 14 19 20 21 22 23 25 27 2$ 29 30 31 32 33 35 36 37 38 graeding 4 Vet. Ned ~ Supplies...

  17. A comparative study of recreation programs at MHMR halfway houses in Texas

    E-Print Network [OSTI]

    McCann, Eileen Mary

    1986-01-01T23:59:59.000Z

    minimum restr ictions upon them leading a normal life. However, the roots of the WHAR Authority of Br azos Valley can be traced back to 1955 when a three year pilot proJect establishing a youth development courcil was implemented. The pr oJect pr... Authority of Brazos Valley. An explanation of how a halfway house f unct iona is included. An analysis of what is current ly provided in each district was conducted and compared with the Brazos Valley' s Hal f way House, Nary Lake. A telephone survey...

  18. KU Today, April 4, 2012

    E-Print Network [OSTI]

    everywhere. Full Story TODAY’S HEADLINES Breakthrough for solar panel material Judy Wu, Distinguished Professor of Physics and Astronomy at the University of Kansas, believes graphene will lead to high-efficiency, ultrathin solar panels.... Full Story TODAY’S EVENTS PUBLIC EVENT KU Smokeout 11 a.m. to 2 p.m., Wescoe Hall View all events TWITTER KU B-School: Former United Nations ambassador John Bolton to give 2012 Vickers lecture 7 p.m. tonight http://ow.ly/a4JbG View...

  19. Methane adsorption on Devonian shales

    E-Print Network [OSTI]

    Li, Fan-Chang

    1992-01-01T23:59:59.000Z

    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...

  20. A multistage approach to vector quantization

    E-Print Network [OSTI]

    Bellubbi, Rajeev V.

    1992-01-01T23:59:59.000Z

    . Grubbs, Jr (Member) J. W. Howze (Head of Department) August 1992 ABSTRACT A Multistage Approach to Vector Quantization. (August 1992) Rajeev V. Bellubbi, B. E. , Bangalore University; India Chair of Advisory Committee: Dr. Vinay Vaishampayan We... is achieved by coding vectors instead of scalars. This fact is true for mem- Journal model is IEEE Transactions on Automatic Controk oryless dais, sonrc& s as w& II as I'or so?r?s with memory. Cloud design tech?iques I'or v&'ctor co&I&'rs &v&sne v& ly...

  1. Testicular damage and regeneration in rats following low-level gamma irradiation

    E-Print Network [OSTI]

    Maxwell, Wesley Howard

    1974-01-01T23:59:59.000Z

    of these animals were examined using several recognized histological procedures. The sequential damage and recovezy of the germinal epithelium was s'tudied for S4 days post-irradiation. The lower dose rate (7 R/hr) resulted in temporari. ly arresting meiotic...- ation of the germinal epithelium of rats irradiated with 7 R/hr was seen by 84 days post-irradiation. However, this same time iv. was not sufficient for total recovery of the rats irradiated to a total dose of 1000 R, at 14 R/hr. ACKNOWLEDGEMENT...

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

    E-Print Network [OSTI]

    Edgar, Susan Elaine

    1986-01-01T23:59:59.000Z

    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...

  3. Estrogen and cyclic amp action, and the involvement of the cytoskeleton on gap junction formation in rat myometrium

    E-Print Network [OSTI]

    Gaddy, Dana

    1985-01-01T23:59:59.000Z

    ), (-)-isoproterenol (ISO), and dl-propranolol (PROP) were purchased from Sigma Chemical Co. (St. Louis, MO). Prostaglandin F2o (PGF) was used as the dinoprost tromethamine salt in Lutalyse (Upjohn, kalamazoo, liI). Dulbecco's phosphate buffered saline (PBS... studies are listed in I'able I. E2B was dissolved in sesame oil. ISO, PROP, COL, CVT. B, and PGEI were dissolved in Du lbecco's VBS. PGF was given in 1 mg doses. All injections were delivered intraperitoneal ly in 200 ul volumes of hormone carrier...

  4. The prediction of root zone soil moisture with a water balance - microwave emission model

    E-Print Network [OSTI]

    Smith, Michael Robert

    1983-01-01T23:59:59.000Z

    . This theorem provides a method for mathematical- ly describing a thermal source of radiation. By convolving the dyadic Green's function of the soil with a three dimensional current source, the electric field is calculated for the soil media. Since the elec... other scattering Since scattering is neglected, ya = S = 0. Thus, the radiative transfer equation becomes yI+ yJ. dI rIz a a ' (I!-5) is the mass absorption coefficient times the density of the soil. For nonscattering media ya = Z a (z) (11...

  5. 2.0 COrE lOgO 2.01 overview

    E-Print Network [OSTI]

    Lotze, Heike K.

    2.0 COrE lOgO 2.01 overview 2.02 cLear space and minimum size 2.03 exampLes of pLacement on coLied to the core Logo 2.08 appLying the Logo properLy 2.09 LinKs to daLhousie authorized core Logo AuguST 2014 with real substance and stature, and seen as a vibrant, welcoming community. Our core logo is the visual

  6. KU Today April 19, 2012

    E-Print Network [OSTI]

    ." Thursday, April 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...-21, 27-28 and at 2:30 p.m. April 22 and 29 in the Crafton- Preyer Theatre. Full Story connect.ku.edu CAMPUS LINKS Chancellor's messages Provost e-news KUMC leadership messages KUMC KU Alumni Association Edwards Campus Kansas...

  7. The Irish Potato. 

    E-Print Network [OSTI]

    Price, R. H.

    1987-01-01T23:59:59.000Z

    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...

  8. A High Precision Aeromagnetic Survey Near the Glen Hummel Field in Texas; Identification of Cultural and Sedimentary Anomaly Sources

    E-Print Network [OSTI]

    Wilson, Clark R.; Tsoflias, Georgios P.; Bartelmann, Monika

    1997-01-01T23:59:59.000Z

    at Austin, Te x a s JOE PHILLIPS, World Geoscience, Houston, Texas We present a case study of a high resolution aeromagnetic survey near the Glen Hummel oil field (Figure 1). The survey was original- ly flown to support a study of aero- magnetic methods... topography, most samples were gathered using a shovel to dig a hole near the fence line to a depth of 15-40 cm. With a plastic spoon, we scraped o ff material near the hole bottom, then gathered a sample, and sealed it in a plastic bag. Susceptibility values...

  9. Land acquisition practices by Texas municipal park and recreation agencies

    E-Print Network [OSTI]

    Reuwsaat, Michael Arthur

    1984-01-01T23:59:59.000Z

    control over the use of that land. Hecause of the total control of the land, park and recreation agencies have tradit1 onal ly run into little res1 stance in the acquisition of such rights. In the past few years the acquisition of fee simple interests... Ownership Interest Ownership of the total interest 1n land, legally referred to as fee simple, was the type most frequently acquired by Texas park and recreation agencies. Fee s1mple ownership was acquired by Bl%%d of the agencies followed by leasehold 1...

  10. SITE

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling7 AugustAFRICAN3u ;;;:: A' 3 ct')s . l-@-Y?

  11. SITE ;&;*E: ELK R~dEx RG&cme ALTERNATE NAIIE:

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling7 AugustAFRICAN3u ;;;:: A' 3 ct')s . l-@-Y?. . .

  12. SITE NAME: CITY:

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling7 AugustAFRICAN3u ;;;:: A' 3 ct')s . l-@-Y?. .

  13. SITE NAME: CITY: L~dL:&lvad:

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling7 AugustAFRICAN3u ;;;:: A' 3 ct')s . l-@-Y?. .,,,

  14. BPAonFabric_jk

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOEprogramJ U LY 2 9 - AU G

  15. BPAonFabric_jk

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOEprogramJ U LY 2 9 - AU

  16. BSF-PMM-890082

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOEprogramJ U LY 2 9 -

  17. BTRIC - Contact US - ORNL

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOEprogramJ U LY 2 9

  18. BUSINESS SENSITIVE

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOEprogramJ U LY 2

  19. Babbage

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOEprogramJ U LY 2Babbage

  20. Background

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOEprogramJ U LY 2Babbage

  1. Background

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOEprogramJ U LY 2Babbage

  2. Background:

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOEprogramJ U LY

  3. Young Dwarf Galaxies and Cosmology

    E-Print Network [OSTI]

    T. X. Thuan; Y. I. Izotov

    1999-02-25T23:59:59.000Z

    We develop here the theme that extremely metal-deficient Blue Compact Dwarf Galaxies (BCDs), those with Z < Zsun/20, are young galaxies which did not start to form stars until ~ 100 Myr ago. They can be thus considered as primeval galaxies in our local volume of the universe, and are excellent laboratories for studying physical processes occuring at the time of galaxy formation in very metal-deficient environments. We use BCDs to derive a new value of the primordial helium abundance Yp = 0.244+/-0.001, higher than previous determinations. This corresponds to a baryon mass fraction Omega_b*h^2_{50} = 0.058+/-0.007. We discuss the problem of dust in a very low-metallicity environment and show how a large fraction (~ 75%) of the young stars are not visible, and that any derivation of the cosmic star formation rate based only on optical/UV fluxes would be an underestimate. We also show how the loss of Ly-alpha photons from starburst regions puts strong constraints on Ly-alpha searches of high-redshift galaxies.

  4. INTERPRETING THE GLOBAL 21 cm SIGNAL FROM HIGH REDSHIFTS. I. MODEL-INDEPENDENT CONSTRAINTS

    SciTech Connect (OSTI)

    Mirocha, Jordan; Harker, Geraint J. A.; Burns, Jack O., E-mail: jordan.mirocha@colorado.edu [Center for Astrophysics and Space Astronomy, University of Colorado, Campus Box 389, Boulder, CO 80309 (United States)

    2013-11-10T23:59:59.000Z

    The sky-averaged (global) 21 cm signal is a powerful probe of the intergalactic medium (IGM) prior to the completion of reionization. However, so far it has been unclear whether it will provide more than crude estimates of when the universe's first stars and black holes formed, even in the best case scenario in which the signal is accurately extracted from the foregrounds. In contrast to previous work, which has focused on predicting the 21 cm signatures of the first luminous objects, we investigate an arbitrary realization of the signal and attempt to translate its features to the physical properties of the IGM. Within a simplified global framework, the 21 cm signal yields quantitative constraints on the Ly? background intensity, net heat deposition, ionized fraction, and their time derivatives without invoking models for the astrophysical sources themselves. The 21 cm absorption signal is most easily interpreted, setting strong limits on the heating rate density of the universe with a measurement of its redshift alone, independent of the ionization history or details of the Ly? background evolution. In a companion paper, we extend these results, focusing on the confidence with which one can infer source emissivities from IGM properties.

  5. Energetic neutral atoms as the explanation for the high velocity hydrogen around HD 209458b

    E-Print Network [OSTI]

    M. Holmström; A. Ekenbäck; F. Selsis; T. Penz; H. Lammer; P. Wurz

    2008-02-20T23:59:59.000Z

    Absorption in the stellar Lyman-$\\alpha$ (Ly-$\\alpha$) line observed during the transit of the extrasolar planet HD 209458b reveals high velocity atomic hydrogen at great distances from the planet. This has been interpreted as hydrogen atoms escaping from the exosphere of the planet, possibly undergoing hydrodynamic blow-off, being accelerated by stellar radiation pressure. However, around solar system planets the production of energetic neutral atoms from charge exchange between solar wind protons and neutral hydrogen from the exospheres has been observed, and should also occur at extrasolar planets. Here we show that the measured transit-associated Ly-$\\alpha$ absorption can be explained by the interaction between the exosphere of HD 209458b and the stellar wind, and that radiation pressure alone cannot explain the observation. This is the first observation of energetic neutral atoms outside the solar system. Since the stellar wind protons are the source of the observed energetic neutral atoms, this provides a completely new method of probing stellar wind conditions, and our model suggests a slow and hot stellar wind near HD 209458b at the time of the observation.

  6. Scintillation characteristics of undoped and Cu+-doped Li2B4O7 single crystals

    E-Print Network [OSTI]

    Kobayashi, Masaaki; Senguttuvan, Nachimuthu

    2015-01-01T23:59:59.000Z

    Scintillation characteristics of undoped and Cu+-doped lithium tetraborate Li2B4O7 (LTB) were studied including optical transmittance, photoluminescence, radioluminescence for X- and gamma-rays, alpha/gamma ratio, and decay kinetics. The total time-integrated LYs in undoped and Cu+-doped LTB for X-rays are ~600 and ~760 ph/MeV (photons/MeV), respectively. The decay kinetics in undoped and Cu+-doped LTB are similar to each other. Typical decay spectra for pulsed X-rays can be fitted with four exponentials: for fast (t1~0.8 ns, t2~25-50 ns), medium (t3~300-400 ns), and slow (t4~20-30 ms) components. The slow component occupies about 60% of the total LY, while the fast ones less than 10%. The 10-90% rise time was 163 ps. The alpha/gamma ratio was 0.18 for external 241Am alpha-rays. The obtained increase in LY due to Cu+ doping remains modest. The Cu+-induced emission contains both fast and slow components, requiring further studies of the emission mechanism to explain the fast component.

  7. Scintillation characteristics of undoped and Cu+-doped Li2B4O7 single crystals

    E-Print Network [OSTI]

    Masaaki Kobayashi; Mitsuru Ishii; Nachimuthu Senguttuvan

    2015-03-12T23:59:59.000Z

    Scintillation characteristics of undoped and Cu+-doped lithium tetraborate Li2B4O7 (LTB) were studied including optical transmittance, photoluminescence, radioluminescence for X- and gamma-rays, alpha/gamma ratio, and decay kinetics. The total time-integrated LYs in undoped and Cu+-doped LTB for X-rays are ~600 and ~760 ph/MeV (photons/MeV), respectively. The decay kinetics in undoped and Cu+-doped LTB are similar to each other. Typical decay spectra for pulsed X-rays can be fitted with four exponentials: for fast (t1~0.8 ns, t2~25-50 ns), medium (t3~300-400 ns), and slow (t4~20-30 ms) components. The slow component occupies about 60% of the total LY, while the fast ones less than 10%. The 10-90% rise time was 163 ps. The alpha/gamma ratio was 0.18 for external 241Am alpha-rays. The obtained increase in LY due to Cu+ doping remains modest. The Cu+-induced emission contains both fast and slow components, requiring further studies of the emission mechanism to explain the fast component.

  8. GADRAS isotope ID users manual for analysis of gamma-ray measurements and API for Linux and Android .

    SciTech Connect (OSTI)

    Mitchell, Dean J; Harding, Lee T.

    2014-05-01T23:59:59.000Z

    Isotope identification algorithms that are contained in the Gamma Detector Response and Analysis Software (GADRAS) can be used for real-time stationary measurement and search applications on platforms operating under Linux or Android operating sys-tems. Since the background radiation can vary considerably due to variations in natu-rally-occurring radioactive materials (NORM), spectral algorithms can be substantial-ly more sensitive to threat materials than search algorithms based strictly on count rate. Specific isotopes or interest can be designated for the search algorithm, which permits suppression of alarms for non-threatening sources, such as such as medical radionuclides. The same isotope identification algorithms that are used for search ap-plications can also be used to process static measurements. The isotope identification algorithms follow the same protocols as those used by the Windows version of GADRAS, so files that are created under the Windows interface can be copied direct-ly to processors on fielded sensors. The analysis algorithms contain provisions for gain adjustment and energy lineariza-tion, which enables direct processing of spectra as they are recorded by multichannel analyzers. Gain compensation is performed by utilizing photopeaks in background spectra. Incorporation of this energy calibration tasks into the analysis algorithm also eliminates one of the more difficult challenges associated with development of radia-tion detection equipment.

  9. Characterizing the Jeans Filtering Scale of the Intergalactic Medium

    E-Print Network [OSTI]

    Kulkarni, Girish; Oñorbe, Jose; Rorai, Alberto; Springel, Volker

    2015-01-01T23:59:59.000Z

    The thermal state of the intergalactic medium (IGM) at z nature and timing of cosmic reionization events, but its inference from the Ly-alpha forest is degenerate with the 3-D structure of the IGM on ~100 kpc scales, where, analogous to the classical Jeans argument, the pressure of the T~$10^4$ K gas supports it against gravity. We simulate the IGM using smoothed particle hydrodynamics, and find that, at z gas density power spectrum does not exhibit the expected Jeans filtering cutoff, because dense gas in collapsed halos dominates the small-scale power masking pressure smoothing effects. We introduce a new statistic, the real-space Ly-alpha flux, $F_\\mathrm{real}$, which naturally suppresses dense gas, and is thus robust against the poorly understood physics of galaxy formation, revealing pressure smoothing in the diffuse IGM. The $F_\\mathrm{real}$ power spectrum is accurately described by a simple fitting function with cutoff at $\\lambda_F$, allowing us to rigorously quanti...

  10. Observations of the Gas Reservoir around a Star Forming Galaxy in the Early Universe

    E-Print Network [OSTI]

    Brenda L. Frye; David. V. Bowen; Mairead Hurley; Todd M. Tripp; Xiaohui Fan; Bradley Holden; Puragra Guhathakurta; Dan Coe; Tom Broadhurst; Eiichi Egami; G. Meylan

    2008-08-08T23:59:59.000Z

    We present a high signal-to-noise spectrum of a bright galaxy at z = 4.9 in 14 h of integration on VLT FORS2. This galaxy is extremely bright, i_850 = 23.10 +/- 0.01, and is strongly-lensed by the foreground massive galaxy cluster Abell 1689 (z=0.18). Stellar continuum is seen longward of the Ly-alpha emission line at ~7100 \\AA, while intergalactic H I produces strong absorption shortward of Ly-alpha. Two transmission spikes at ~6800 Angstroms (A) and ~7040 A are also visible, along with other structures at shorter wavelengths. Although fainter than a QSO, the absence of a strong central ultraviolet flux source in this star forming galaxy enables a measurement of the H I flux transmission in the intergalactic medium (IGM) in the vicinity of a high redshift object. We find that the effective H I optical depth of the IGM is remarkably high within a large 14 Mpc (physical) region surrounding the galaxy compared to that seen towards QSOs at similar redshifts. Evidently, this high-redshift galaxy is located in a region of space where the amount of H I is much larger than that seen at similar epochs in the diffuse IGM. We argue that observations of high-redshift galaxies like this one provide unique insights on the nascent stages of baryonic large-scale structures that evolve into the filamentary cosmic web of galaxies and clusters of galaxies observed in the present universe.

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

    E-Print Network [OSTI]

    Brenda Frye; Tom Broadhurst

    1997-12-08T23:59:59.000Z

    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.

  12. Neutral interstellar hydrogen in the inner heliosphere under the influence of wavelength-dependent solar radiation pressure

    E-Print Network [OSTI]

    Tarnopolski, S; 10.1051/0004-6361:20077058

    2008-01-01T23:59:59.000Z

    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 overestima...

  13. The Low-Redshift Lyman Alpha Forest toward PKS 0405-123

    E-Print Network [OSTI]

    G. M. Williger; S. R. Heap; R. J. Weymann; R. Dave; E. Ellingson; R. F. Carswell; T. M. Tripp; E. B. Jenkins

    2005-08-31T23:59:59.000Z

    We present STIS 7km/s resolution data of the Ly-a forest toward PKS0405-123 (z=0.574). We make two samples. The strong sample (60 systems) has column density logNHI>13.3 over 0.00213.1 at 0.020velocity from HI. The strong sample Doppler parameters show =47+-22km/s; for the weak, =44+-21km/s. Line blending and s/n effects likely inflate b. The redshift density dN/dz is consistent with previous, lower resolution results for logNHI>14.0. For 13.113.3, consistent with a numerical model. There is a void in the strong sample at 0.0320radial velocity correlations for Delta v 13.5-14.0. The strength is similar to that of the galaxy-galaxy correlation for our sample, implying that such Ly-a systems have mass log M/Msun= 11.3+1.0-0.6. Including lower column density systems in the sample shows correlations only out to Delta v <125km/s, as would be expected for smaller density perturbations. Galaxy counts and local HI column density appear correlated, peaking at ~5000km/s. We also give column densities for Galactic species. (Abridged)

  14. QUASARS PROBING QUASARS. VI. EXCESS H I ABSORPTION WITHIN ONE PROPER Mpc OF z ? 2 QUASARS

    SciTech Connect (OSTI)

    Prochaska, J. Xavier; Cantalupo, Sebastiano; Lau, Marie Wingyee [Department of Astronomy and Astrophysics, UCO/Lick Observatory, University of California, 1156 High Street, Santa Cruz, CA 95064 (United States); Hennawi, Joseph F.; Lee, Khee-Gan; Myers, Adam; Rubin, Kate H. R. [Max-Planck-Institut für Astronomie, Königstuhl 17, D-69115 Heidelberg (Germany); Bovy, Jo [Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540 (United States); Djorgovski, S. G. [California Institute of Technology, Pasadena, CA 91125 (United States); Ellison, Sara L. [Department of Physics and Astronomy, University of Victoria, Finnerty Road, Victoria, British Columbia V8P 1A1 (Canada); Martin, Crystal L. [Department of Physics, University of California, Santa Barbara, Santa Barbara, CA 93106 (United States); Simcoe, Robert A. [MIT-Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)

    2013-10-20T23:59:59.000Z

    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? absorption transverse to luminous, z ? 2 quasars at proper separations of 30 kpc < R < 1 Mpc. In contrast to measurements along the line-of-sight, regions transverse to quasars exhibit enhanced H I Ly? absorption and a larger variance than the ambient intergalactic medium, with increasing absorption and variance toward smaller scales. Analysis of composite spectra reveals excess absorption characterized by a Ly? equivalent width profile W = 2.3 Å (R /100 kpc){sup –0.46}. We also observe a high (? 60%) covering factor of strong, optically thick H I absorbers (H I column N{sub H{sub I}}>10{sup 17.3} cm{sup -2}) at separations R < 200 kpc, which decreases to ?20% at R ? 1 Mpc, but still represents a significant excess over the cosmic average. This excess of optically thick absorption can be described by a quasar-absorber cross-correlation function ?{sub QA}(r) = (r/r{sub 0}){sup ?} with a large correlation length r{sub 0} = 12.5{sup +2.7}{sub -1.4} h{sup -1} Mpc (comoving) and ?=1.68{sup +0.14}{sub -0.30}. The H I absorption measured around quasars exceeds that of any previously studied population, consistent with quasars being hosted by massive dark matter halos M{sub halo} ? 10{sup 12.5} M{sub ?} at z ? 2.5. The environments of these massive halos are highly biased toward producing optically thick gas, and may even dominate the cosmic abundance of Lyman limit systems and hence the intergalactic opacity to ionizing photons at z ? 2.5. The anisotropic absorption around quasars implies the transverse direction is much less likely to be illuminated by ionizing radiation than the line-of-sight.

  15. Orbital and stochastic far-UV variability in the nova-like system V3885 Sgr

    E-Print Network [OSTI]

    Prinja, R K; Richards, M T; Witherick, D K; Peck, L W

    2011-01-01T23:59:59.000Z

    Highly time-resolved time-tagged FUSE satellite spectroscopic data are analysed to establish the far-ultraviolet (FUV) absorption line characteristics of the nova-like cataclysmic variable binary, V3885 Sgr. We determine the temporal behaviour of low (Ly_beta, CIII, NIII) and high (SIV, PV, OVI) ion species, and highlight corresponding orbital phase modulated changes in these lines. On average the absorption troughs are blueshifted due to a low velocity disc wind outflow. Very rapid (~ 5 min) fluctuations in the absorption lines are isolated, which are indicative of stochastic density changes. Doppler tomograms of the FUV lines are calculated which provide evidence for structures where a gas stream interacts with the accretion disc. We conclude that the line depth and velocity changes as a function of orbital phase are consistent with an asymmetry that has its origin in a line-emitting, localised disc-stream interaction region.

  16. Some characteristics of waves broken by a longshore bar

    E-Print Network [OSTI]

    McNair, Ernest Clark

    1970-01-01T23:59:59.000Z

    versi. Ly. iv!onochromati c & gravity matc! waves a!ere ge!crated toward this bar formation. The waves broke as they passed over the bar and then re-formed as they entered the deeper water in the lee of' the bar. Recordings of the vrater-surface time... water level; a a:id b are i&oui". '~cr cocf'- "n n ficients; ii Is an int gcr co"tqicicn4; aii&I o is the angular fre- quency. IIg ihc application oi. ' Lhc Farscval 4I&eor" irr f' or. pcrioriic f'unciici. ons (ri) & T && Pg ~(*)? dt E. -r I T 0 7...

  17. Distributively generated near rings on the dihedral group of order eight

    E-Print Network [OSTI]

    Willhite, Mary Lynn

    1970-01-01T23:59:59.000Z

    is that (xy)p (xP) ~ ' (yP) for any x an. d y in G. Let x=)ti i=1 all t and s in T. Then n m ( $ (tiP ))' ( 7 (s P )) i=1 J=l = (xP) ' (yP) Theorem $. Let (G, +, ~ ) be a d. g. near ring and A = faFG jag--0 for all geG). Then A is a normal subgroup...DISTRIBHvlri "LY GEZERKTED NEZR RINGS ON THE DIH ', DRAL GRODP OP ORDER EIGHT A Thesis INRy LING VILLHITE Submitted to the Gra~', . ate ' allege of Tezas jan& Rnid e'r, si!, y in Parti "1 fulfillment of the reGui rom nt fo- the eSree o MASTER...

  18. Linear feature selection and the probability of misclassification

    E-Print Network [OSTI]

    Darcey, Louise Wilson

    1974-01-01T23:59:59.000Z

    ;C) exists and is given by Bg(B;C) = q Bp (y, B;C)dy + q Bp (y, B;C)dy. Rl (B) R2 (B) Substituting the expression for Sp (y, B;C) from the Lemma into this formula for Bg(B;C) results in the expression Cr, B' ( 5g(B;C) -q J p (y, B)dy BXB R (B) Cp, j... regions in E are given by I 1 R (B) = yEE ( qp (y, B)&qp (y, B) 1 B (B) = IyEE: q p (y, B) q p (y, B)) 1 Letting L denote the log likelihood ratio, we obtain qlp, (y. B) L(y, B) = ) qgp2(y BB) + 2BQB 2' B / hBXB BX B / (Bg) (Bg) q BP B + + ln...

  19. Operational factorization of the linear second-order differential equation with variable coefficients

    E-Print Network [OSTI]

    Austin, Larry Morton

    1966-01-01T23:59:59.000Z

    " ? ' + 2 2 3 x x x The expansion of Equation (I-4) is as follows. (. D + f (x) ] R) + g (x) j y = [ D + f (x) 3 L y' t g (x) y ) = D I. y ' + g (x) y J + f (x) Ly ' + g (x) y) = y" +g(x) y' + g'(x) y + f(x) y' + f (x) g (x) y . Collecting terms, we... have Y" + & 9 (x) + f(x) ) Y' + &g'(x) + I (x) 9 (x) &Y = O. (I-6) The similarity between Equations (I-3) and (I-5) is obvious, and we note that both equations are monic. Thus, equating the coefficients of y' and y in the two equations yields...

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

    E-Print Network [OSTI]

    Lieberman, Bruce S.; Vrba, Elisabeth S.

    1995-01-01T23:59:59.000Z

    , Eldredge 1 9 8 5 , M a y r 1 9 6 3 ) . Its m a r g i n a l ro le may be part ly due to w h a t is perceived as a pauc i ty of examples and to the dif­ f iculty in formula t ing tests to ana­ lyze h ierarchica l s t ructure . In this ar t ic le , w e... to noncoding DNA. In the pas t , sc ient ists had suggested tha t se lect ion might occur at each of these levels (e .g. , R o u x 1 8 8 1 , Smuts 1 9 2 5 , W r i g h t 1 9 3 1 , W y n n e - E d w a r d s 1 9 6 2 ) , but their conc lu­ sions were e i ther...

  1. The effect of dimethyl sulfoxide on tobacco tissue and tobacco mosaic virus multiplication

    E-Print Network [OSTI]

    Miller, Lester Lynn

    1969-01-01T23:59:59.000Z

    ?mb i of virus lesions i&roducod by l0 half leaf r pli! Siiors with treatments applied dirr ct Ly to & elean NN! 7 eaves. 32 Number cf de i's post i"1ocuLat'ion w71en samp7es from 7eaves oi' Sar sun plants pret" sated with DNSO first produced local... with in ;: f'e, days after the inif iation of the experj ment. cssav of tis, u ~ f?oa: this shoot . :as made on the iw. clith day post inoc:la' ior an ! the viru- was detected. The same plant beg:n to fiowe. o? Ll, fo '. teenth day of tl"e exp riment. ). 11...

  2. Characterization of Individual Nanoparticles and Applications of Nanoparticles in Mass Spectrometry

    E-Print Network [OSTI]

    Rajagopal Achary, Sidhartha Raja

    2011-08-08T23:59:59.000Z

    , as 10 A to m ic o r P o ly a to m ic Pr im a ry I o n S e c o n d a ry I o n s , E le c tr o n s , P h o to n s , N e u tr a ls F ig u re 1. 1... le x ? p ar ti c le s. b ). T h e d is tr ib u ti on i n th e si ze f o r 50n m A le x . c ). H igh re so lu ti on T E M pho to o f A lu m inu m po w d er s (A P S -100 n m...

  3. Computer solution of SU(3) crossing matrices for the Kronecker Product 8 x 10

    E-Print Network [OSTI]

    Wells, Alan Harvey

    1975-01-01T23:59:59.000Z

    Ib C-G ygLOE YES 'ERO+r I/0 CRFAIE 0'&Dl 5'li 5 4 5 YES C. G Vill HC ZEKOF OEO S 0 yscu& NO &'&S FliVO 5 KFCXii KCI 0. PHKFE J CTPK a FIVD MOOR OF EKEP77EFFT CKl LC 0' Fl TE C-G VJ&EOE EFROD47CT' CipO2 NO S ~STDPc" t C D E C... for reference. 4, v, y~ V. vgy~ (Z l5) (Izb-I + g ( Yb-Y with ts ( -I) (w, ~?~, ~, ly ~X Jr, ~t;~~??) = 4s'g V~1~g Vg 3 o +i ~j, +J ls ', Is V~ gy P ~ +AVE (S. l6 ) with = ( -1) ~ut (I Izc) + -'~( Yd-Yc We will also now include the equivalent formula...

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

    E-Print Network [OSTI]

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

    , and as a n 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... and attacks on fol 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...

  5. Found: The missing blue opacity in atmosphere models of cool hydrogen white dwarfs

    E-Print Network [OSTI]

    P. M. Kowalski; D. Saumon

    2006-09-26T23:59:59.000Z

    We investigate the importance of the far red wing of the Lyman $ \\alpha$ line of hydrogen in the atmospheres of cool white dwarfs of pure hydrogen composition. We find that this absorption process dominates all important sources of opacity in the blue part of the optical spectrum of these stars. Our successful fits to the spectra of cool DA/DC white dwarfs indicate that the far red wing of the $\\rm Ly \\alpha$ line is the source of opacity that had been missing in the models. The observed sequence of cool white dwarfs in color-color diagrams is very well reproduced by our new pure hydrogen atmosphere models, suggesting that the atmospheric composition of the coolest DC white dwarfs must be revisited.

  6. Neutral particle beam sensing and steering

    DOE Patents [OSTI]

    Maier, II, William B. (Los Alamos, NM); Cobb, Donald D. (Los Alamos, NM); Robiscoe, Richard T. (Los Alamos, NM)

    1991-01-01T23:59:59.000Z

    The direction of a neutral particle beam (NPB) is determined by detecting Ly.alpha. radiation emitted during motional quenching of excited H(2S) atoms in the beam during movement of the atoms through a magnetic field. At least one detector is placed adjacent the beam exit to define an optical axis that intercepts the beam at a viewing angle to include a volume generating a selected number of photons for detection. The detection system includes a lens having an area that is small relative to the NPB area and a pixel array located in the focal plane of the lens. The lens viewing angle and area pixel array are selected to optimize the beam tilt sensitivity. In one embodiment, two detectors are placed coplanar with the beam axis to generate a difference signal that is insensitive to beam variations other than beam tilt.

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

    E-Print Network [OSTI]

    Shrestha, Kashish Das

    uprising against the King's dictatorship saw millions of people taking to the streets against his rule. In his televised national address, the King reinstated the dissolved parliament/ house of representatives and stepped down as the country's direct... hgfPsf] ;f] k|ltof]lutfsf] pTs[i6 kfFrf} :yfgdf ljhoL tLg hgf ;'Gb/L ;lxt hd'gf u'?ª / t'n;f u'?ªn] klg cfˆgf] :yfg ;'/lIft ug{ ;kmn ePsf lyP . Pln;f du/ -bds_, h]lgkm/ /fO{ -sf7df08f}_, bLkf k'g -kf]v/f_, lqmli6gf u'?ª -wflbª_ / k|ldtf /fO{ -sf7...

  8. Pseudo-random construction and reduced complexity decoding for low density parity check codes

    E-Print Network [OSTI]

    Prabhakar, Abhiram

    2001-01-01T23:59:59.000Z

    &, randomly constrn(t(&d panty-check inatrix at, thv, d&x o&1&&r can hc prohil&it. ivc in somr. applicatio&is. &Vh(:n a systvn& has a svt. of &liffcr&&nt LDI'(, ' codv&n each of t, hc parity-vhvrk matri?s nc&. 'd t, o hv, storvd in the rcceivcr. Anot h& r...)(Lkc(vtr, k)) L=l, k fr ('2. 1fi) Vr stprr(L, L(Tm )) = g srpn(LL, (l:r&, .)) k=1 kgr ('2. 17) Thc Eq. 2. 17 must hv. vomput&. &1 for a111=1. 2. p ? 1 and an cfficicnt, approach is nscd. First rkc fin&1 two &tuarititi&ls i&)1 arid Sl givvrl )ly Pg k...

  9. OTA based active filter design

    E-Print Network [OSTI]

    Ferrell, John Steven

    1983-01-01T23:59:59.000Z

    I gmZ IC3 ) gmlgmZ ~CZ+C C I (4. aS) comparing (4. 44) and (4. 45), it is seen that gm CZ+C3 ( 4. 46) gm1g!l!2 b ~cr+c& c& gtl!1 gm2 C C1C3 (4. 48) Since C is r. he numerator. wo and b is the denominator wo anti since both b and c...) . bince t'&Ie i no& t to pm3 ''s to tl e pcs iti ve ter i)inal nf &hc CT&& the :leno&nina& or term consists of tlie sun) ot gm an ' gi3. 1'hc &. xpected !1 of th ) s !ov pass expe&'i I&PI) tal cl &'oui't 1 s l/2 since g&tl =amg=&lr&'l. Cr iphic?!ly &t...

  10. Southern Enclave Issue 32

    E-Print Network [OSTI]

    1992-01-01T23:59:59.000Z

    , or in the cantina which, by the way, we are running a STAR WARS auction. Anylx:x:ly's welcaJe to care in and go through the auc tion. It's silent bids. There's a lot of really nice ittm3 in there. You're welcane. cc: Well, I don't really know what we... over in North carolina ... but there are a lot of S'mR WARS people in the D.C. area. I aean, that's one of the central Fast Coast locaticns. Wruldn't it be nice if we could all get together at the opposite end of the year fran MediaWest? cc: I...

  11. An appraisal of the United States livestock export market

    E-Print Network [OSTI]

    Smith, Walter Ewing

    1958-01-01T23:59:59.000Z

    145 5R 60 7 lr075 1 16 15 27 la606a 975 Xy 262 a 338 18a 099 Ia8gl Ia1~6 1$a705 5a500 143aRIR 88a)51 RgNX} Ra730 375 3, 463 &650 l:P 134a 375 5CO Rg000 Ia275 la 575 3y40la013 18 16 8 4 6 25 30 29 17 27 33 21 22.... Lfriea BOD. vta India Rritioh Cuiana 0rngsag Argentina Pialasd Pr ~ Po Xoo 183gt13l 1&laRt0 1, 678 St0 40$ 1, 0hS 780 QS 17y061 4, 613 ly01$ 13' 4tl Xhyt01 32' 6' hi687 7 40t 43 2~138 SV Rj X5 16 170 la& 40 13. tR3, 47t...

  12. Colorimetric microanalysis of several organic feed additives

    E-Print Network [OSTI]

    Beckman, Herman F.

    1959-01-01T23:59:59.000Z

    s is through con tro l o f pH and by lim itin g the strength o f the d iazotiz ing reagen ts . Drugs which are added to feed s at the p resen t t im e c o v e r the range fr om s tr ic t ly in organ ic com pounds to rather com p lex h e te r o cy... s to show how la rg e and com p lex the drug f ie ld has b e com e , and is the 2 m ost com preh en sive l is t ava ilab le . At p resen t, seven m ethods are sp on sored as ?? o f f ic ia l" by the A sso c ia t ion o f O ffic ia l A gr icu ltu...

  13. The effect of dimethyl sulfoxide on tobacco tissue and tobacco mosaic virus multiplication 

    E-Print Network [OSTI]

    Miller, Lester Lynn

    1969-01-01T23:59:59.000Z

    ?mb i of virus lesions i&roducod by l0 half leaf r pli! Siiors with treatments applied dirr ct Ly to & elean NN! 7 eaves. 32 Number cf de i's post i"1ocuLat'ion w71en samp7es from 7eaves oi' Sar sun plants pret" sated with DNSO first produced local... with in ;: f'e, days after the inif iation of the experj ment. cssav of tis, u ~ f?oa: this shoot . :as made on the iw. clith day post inoc:la' ior an ! the viru- was detected. The same plant beg:n to fiowe. o? Ll, fo '. teenth day of tl"e exp riment. ). 11...

  14. An intern experience at Texas A&M University and Texas A&M Research Foundation: an internship report

    E-Print Network [OSTI]

    Le Blanc, Joseph Urlan, 1937-

    2013-03-13T23:59:59.000Z

    ledge and s k i l l in the mathematica l, p h y s ? ica l, and social sciences to g e th e r w i th the p r in c ip le s and meth ? ods o f e n g in e e r in g ana lys is and de s ig n , to s p e c i fy , p r e d ic t , and eva lua te... o o rd in a to r , I wanted to a pp ly accep tab le in te rv ie w and e va lua ? t io n te chn iques wh ile h i r i n g and s u p e rv is in g emp loyees .) 6. P repa re and coo rd ina te news releases and make techn ica l eva lua...

  15. A Search for H-alpha Absorption in the Exosphere of the Transiting Extrasolar Planet HD 209458b

    E-Print Network [OSTI]

    Joshua N. Winn; Yasushi Suto; Edwin L. Turner; Norio Narita; Brenda L. Frye; Wako Aoki; Bunei Sato; Toru Yamada

    2004-06-28T23:59:59.000Z

    There is evidence that the transiting planet HD 209458b has a large exosphere of neutral hydrogen, based on a 15% decrement in Lyman-alpha flux that was observed by Vidal-Madjar et al. during transits. Here we report upper limits on H-alpha absorption by the exosphere. The results are based on optical spectra of the parent star obtained with the Subaru High Dispersion Spectrograph. Comparison of the spectra taken inside and outside of transit reveals no exospheric H-alpha signal greater than 0.1% within a 5.1A band (chosen to have the same Delta_lambda/lambda as the 15% Ly-alpha absorption). The corresponding limit on the column density of n=2 neutral hydrogen is N_2 <~ 10^9 cm^{-2}. This limit constrains proposed models involving a hot (~10^4 K) and hydrodynamically escaping exosphere.

  16. WATER PRODUCTION BY COMET 103P/HARTLEY 2 OBSERVED WITH THE SWAN INSTRUMENT ON THE SOHO SPACECRAFT

    SciTech Connect (OSTI)

    Combi, M. R. [Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, 2455 Hayward Street, Ann Arbor, MI 48109-2143 (United States); Bertaux, J.-L.; Quemerais, E. [LATMOS, CNRS/INSU, Universite de Versailles Saint-Quentin, 11 Bd d'Alembert, 78280 Guyancourt (France); Ferron, S. [ACRI-st, Sophia-Antipolis (France); Maekinen, J. T. T., E-mail: mcombi@umich.edu, E-mail: Jean-Loup.Bertaux@aerov.jussieu.fr, E-mail: eric.quemerais@latmos.ipsl.fr, E-mail: Stephane.Ferron@aerov.jussieu.fr, E-mail: Teemu.Makinen@fmi.fi [Finnish Meteorological Institute, Box 503, SF-00101 Helsinki (Finland)

    2011-06-10T23:59:59.000Z

    Global water production rates were determined from the Ly{alpha} emission of hydrogen around comet 103P/Hartley 2, observed with the SWAN (Solar Wind Anisotropies) all-sky camera on the SOHO spacecraft from 2010 September 14 through December 12. This time period included the November 4 flyby by the EPOXI spacecraft. Water production was three times lower than during the 1997 apparition also measured by SWAN. In 2010, it increased by a factor of {approx}2.5 within one day on September 30 with a similar corresponding drop between November 24 and 30. The total surface area of sublimating water within {+-}20 days of perihelion was {approx}0.5 km{sup 2}, about half of the mean cross section of the nucleus. Outside this period it was {approx}0.2 km{sup 2}. The peak value was 90%, implying a significant water production by released nucleus icy fragments.

  17. Old Friends Issue 1

    E-Print Network [OSTI]

    Multiple Contributors

    1994-01-01T23:59:59.000Z

    -OLD FR1ENDS Th e Explanation~ l Actions speak louder t han words--an old cliche which is ~till true. After bemoaning the loss o f t he circuit , and realizing that as f olks who occasional ly p r oduce %ines were straddling both sides... lund . I was going to list them allan a .ponsor page--but .0 m.ny t old me t hey didn ' t want m. to, th.t I d.cided j u.t to thank them each p.r.onally .nd m.k. sure they got two copies, same •• th. contributor.' So THANK YOU to ev.ryone who...

  18. The relationship between incomes and age of heads of households viewed locally as being in poverty in a twelve-county area of Texas

    E-Print Network [OSTI]

    Martin, Marsha Pyle

    1970-01-01T23:59:59.000Z

    !. t t'!aL p?op e !iu!en;lured foc any lenr ti! of t Lee terd to sir!k;;; nnstby. Tnei: v; . k his+cry rsay have 'nec. . n one of failure, s . d, if' they a e very young! allv asrirat. 'ons they possess . : o- higr!er a hi, vcr"errt so . n s.... Uuiver-i. y iu Pertie~ zwfll. ~rent o: the rendu resent or the dept e oP '%ST"R OF SCI ~ . CZ Augu;. t 1" ', 0 v~oor Sup Je t'. Sooio" o@ TIIE REr j(TTOI'IHHTP HETijEEII TIICOIm, H jUID AOE OF PKKH OP HOUHEHOLDS j ml 'J3 LGCjd LY A BETI;C. Tij POX...

  19. Auslegung: a journal of philosophy, Volume 19, Number 2 (Summer 1993): Front Matter

    E-Print Network [OSTI]

    . The Journal is intended as a f o r u m for the e x p r e s s i o n of any and all scholar ly philosophical p e r s p e c t i v e s . The editors are primarily interested in publishing the w o r k of n e w P h . D ' s a n d a d v a n c e d s t u d e n t s p... u r s u i n g a P h . D . d e g r e e in Phi losophy . H o w e v e r , all technically c o m p e t e n t p h i l o s o p h i c a l w o r k will be considered. Auslegung opposes all forms of discrimi­ nation on the basis of: race, gender , creed...

  20. Lyman Alpha Absorption in The Cosmic Web

    E-Print Network [OSTI]

    J. Richard Bond; James W. Wadsley

    1997-10-10T23:59:59.000Z

    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.

  1. Effects and Meaning: Metaphors as Implicit Speech Acts

    E-Print Network [OSTI]

    Seals, Anastasia Margaret

    2014-08-31T23:59:59.000Z

    the core simi la r i ti e s noti ce d in each case . The use of a meta phor requi r e s exploi t in g Grice ’s maxi ms of conve r sa t i on and follow in g certa in conve n ti ons that para lle l those requi r e d of othe r spee ch a cts. Meta phor... dar d or lite ra l meani n g of a word is some t hi n g akin to its dict ion a r y defini t i on; it is close ly rela te d to how the words are typi ca lly used by spea k e rs. 2 The stan dar d meani n g of an utte r an ce is some t hi n g...

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

    E-Print Network [OSTI]

    Mayer, Marion Sidney

    1961-01-01T23:59:59.000Z

    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...33. veevils starved 48 bangs prior to txeatmsnt ~ t ~ ~ ~ ~ s ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ R3 Bats of uptabs af P32 Psd at a gate of l. gf cc/ml af a lD psr cent hammy~ter solution by sCpxsxe xeaxed bail essvils nat stsrvslL prior...

  3. ON THE REMOTE DETECTION OF SUPRATHERMAL IONS IN THE SOLAR CORONA AND THEIR ROLE AS SEEDS FOR SOLAR ENERGETIC PARTICLE PRODUCTION

    SciTech Connect (OSTI)

    Laming, J. Martin; Moses, J. Daniel; Ko, Yuan-Kuen [Space Science Division, Naval Research Laboratory, Code 7684, Washington, DC 20375 (United States); Ng, Chee K. [College of Science, George Mason University, Fairfax, VA 22030 (United States); Rakowski, Cara E.; Tylka, Allan J. [NASA/GSFC Code 672, Greenbelt, MD 20771 (United States)

    2013-06-10T23:59:59.000Z

    Forecasting large solar energetic particle (SEP) events associated with shocks driven by fast coronal mass ejections (CMEs) poses a major difficulty in the field of space weather. Besides issues associated with CME initiation, the SEP intensities are difficult to predict, spanning three orders of magnitude at any given CME speed. Many lines of indirect evidence point to the pre-existence of suprathermal seed particles for injection into the acceleration process as a key ingredient limiting the SEP intensity of a given event. This paper outlines the observational and theoretical basis for the inference that a suprathermal particle population is present prior to large SEP events, explores various scenarios for generating seed particles and their observational signatures, and explains how such suprathermals could be detected through measuring the wings of the H I Ly{alpha} line.

  4. 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

    2006-06-30T23:59:59.000Z

    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.

  5. Field Tests with Corn at College Station and Beeville.

    E-Print Network [OSTI]

    Pittuck, B. C.; Connell, J. H.

    1898-01-01T23:59:59.000Z

    . . . 4.13 4.69 2.87 * 4.04 2.33 5.33 1.77 2.62 4.43 R ain fa ll in inches for J u ly .................. 2.47 .45 1.36 .75 .45 1.64 1.51 .48 1.45 2.60 Rain fa ll in inches for A u gu stf .......... 1.19 .75 .09 3.99 1.85 7.01 2.81 .60 4.68 .21 * Data... inches in the drill. 2. V arie ty and D istance Test?Embracing 5 varieties, th e d istance varying between rows from 3 feet to 5 feet, and 2 1-2 feet to 3 feet in the drill. SUMMARY OF RESULTS. COLLEGE STATION. Varieties?W ith th e varie...

  6. The influence of frequency of milking and nursing upon twenty four hour milk production of Hereford cows

    E-Print Network [OSTI]

    Chow, Guillermo

    1964-01-01T23:59:59.000Z

    were respectiveLy, 52, 589, 27, - 55 snd 79 pounds. Regressions oi' calf gains on milk, butterfat, solids-not fat end total solids were respectively, O. OOL, 0. 05, 0. 54 and 0. 24. Low corrs letione were found between milk yields and butterfat... ' 46I4;4-+7. 6 28 25 22. 48 24. 73 27A6 37. 28 38. 01 2a64 37 28 51. 6 67. 5 44 a~7. 5 67. 53 65. M 64. 94 84 66 M4. 7e 74 31 64. 94 1(%. 7 "Es(5la 2(. . pMr of Caloties in hgtegc a(dd Solids Sot-pat Prodscsd is a 24 Boar Period asd...

  7. Terminal Velocity Infall in QSO Absorption Line Halos

    E-Print Network [OSTI]

    Robert A. Benjamin

    1998-11-04T23:59:59.000Z

    We explore the hypothesis that clouds detected in quasar absorption line systems are falling at a terminal velocity toward the center of high redshift gaseous galactic halos. Since both the ionization level and terminal velocity of halo clouds increase with increasing distance from the central galaxy, velocity resolved profiles of highly ionized gas are predicted to have a greater width than low ionization gas. A line of sight passing through the center of gaseous halo (an idealized damped Ly alpha system), yields low ionization absorption at the velocity of the galaxy, flanked by high ionization on either side. Reasonable halo parameters yield total velocity extents for C IV of v_{C IV}=100-200 km/s, in agreement with several observed systems. The remaining systems may better described by the rotating disk model of Prochaska & Wolfe (1998). Finally, observational tests are suggested for verifying or falsifying the terminal velocity hypothesis for these systems.

  8. Efficacy of a Crosslinked Hyaluronic Acid-Based Hydrogel as a Tear Film Supplement: A Masked Controlled Study

    E-Print Network [OSTI]

    Williams, David L.; Mann, Brenda K.

    2014-06-10T23:59:59.000Z

    (2 ), or se ve re (3 ). O w ne r ha pp in es s sc or es w er e ra te d fr om no t ef fe ct iv e (0 ) to hi gh ly ef fe ct iv e (3 ). do i:1 0. 13 71 /j ou rn al .p on e. 00 99 76 6. t0 02 Crosslinked HA-Based Hydrogel as Tear Film Supplement PLOS ONE... for owner and pet, and for human patients also. In a previous study we reported the use of a crosslinked HA- based hydrogel as a tear supplement in a clinical study of 25 dogs with KCS [16]. Although the study demonstrated the potential for the x...

  9. The mechanism of HIV-1 Nef-mediated downregulation of CD4

    E-Print Network [OSTI]

    Chaudhuri, Rittik

    2010-02-09T23:59:59.000Z

    sequence NMR nuclear magnetic resonance NK natural killer NP-40 nonyl phenoxylpolyethoxylethanol-40 OD optical density ORF open reading frame P PACS-1 phosphofurin acidic cluster sorting protein-1 lymphotoxin-like, exhibits inducible expression and competes... at e xp re ss a bn or m al ly lo w le ve ls o f M H C -I on th ei r su rf ac e, a s th is ph en ot yp e is o ft en a n in di ca tio n th at th e ce ll ha s be en in fe ct ed b y a fo re ig n or ga ni sm . N K c el ls S im ila r...

  10. Nepali Aawaz Volume 1, Issue 15, 7 June 2006

    E-Print Network [OSTI]

    Shrestha, Kashish Das

    green card- identifying thus the need for a comprehensive strategy to enhance their ability to pursue the lasting opportunities in the States. Accordingly, the one of the keystones of the wide- ranging strategy is a proposal to amend immigration... Gtl/ d ;/sf/sf] afu8f]/ cf?gf] xftdf lng] /0fgLltdf 5g\\,t/ k|ltlglw;ef cl:tTjdf / x]df pgLx? k|fljlws ?kdf ;Qf k|lt:kwf{df xfg]{ 5g, h;/L g]kfnL sf+u]|;sf] dxflwj]zgdf g/xl/ cfrfo{sf Ph]G8f ljhoL eP/ klg lul/hfk|;fb sf]O/fnf;Fu xf/]sf lyP. kvf...

  11. Cepheid Masses: FUSE Observations of S Mus

    E-Print Network [OSTI]

    Nancy Remage Evans; Derck Massa; Alexander Fullerton; George Sonneborn; Rosina Iping

    2006-07-21T23:59:59.000Z

    S Mus is the Cepheid with the hottest known companion. The large ultraviolet flux means that it is the only Cepheid companion for which the velocity amplitude could be measured with the echelle mode of the HST GHRS. Unfortunately, the high temperature is difficult to constrain at wavelengths longer than 1200 \\AA because of the degeneracy between temperature and reddening. We have obtained a FUSE spectrum in order to improve the determination of the temperature of the companion. Two regions which are temperature sensitive near 16,000 K but relatively unaffected by H$_2$ absorption (940 \\AA, and the Ly $\\beta$ wings) have been identified. By comparing FUSE spectra of S Mus B with spectra of standard stars, we have determined a temperature of 17,000 $\\pm$ 500 K. The resultant Cepheid mass is 6.0 $\\pm$ 0.4 M$_\\odot$. This mass is consistent with main sequence evolutionary tracks with a moderate amount of convective overshoot.

  12. Women: the key to successful development policies for subsistence agriculture in sub-Saharan Africa

    E-Print Network [OSTI]

    Ryan, Kathie Elaine

    1971-01-01T23:59:59.000Z

    found in the American Economic Review. pku t invest i gator s d? realize the' necessity of studying this problc m, ;u?l their studies, therefore, note that A rica "is un 1; rgo! ng r?pi 8 anc! profound change s. u [76, p. 7] . As Thomas gut ten has... that there is an insistent need for radical improvements in methods of food productions !o rutsL p; nduL ttv! Ly levels. [26, pp. I ? 3] . in 1 he !aut ik. cade, prot!ut t1 on in the African agrarian sec'or has r!;cu nt n rote of approximately 1. 7 pcr cont per year, wl...

  13. SPECTROSCOPIC CONFIRMATION OF A z = 6.740 GALAXY BEHIND THE BULLET CLUSTER

    SciTech Connect (OSTI)

    Bradac, Marusa; Hall, Nicholas [Department of Physics, University of California, Davis, CA 95616 (United States); Vanzella, Eros [INAF, Osservatorio Astronomico di Trieste, via G.B. Tiepolo 11, 34131 Trieste (Italy); Treu, Tommaso [Department of Physics, University of California, Santa Barbara, CA 93106 (United States); Fontana, Adriano [INAF, Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monteporzio (Italy); Gonzalez, Anthony H. [Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, FL 32611 (United States); Clowe, Douglas [Department of Physics and Astronomy, Ohio University, Clippinger Labs 251B, Athens, OH 45701 (United States); Zaritsky, Dennis; Clement, Benjamin [Steward Observatory, University of Arizona, 933 N Cherry Ave., Tucson, AZ 85721 (United States); Stiavelli, Massimo, E-mail: marusa@physics.ucdavis.edu [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)

    2012-08-10T23:59:59.000Z

    We present the first results of our spectroscopic follow-up of 6.5 < z < 10 candidate galaxies behind clusters of galaxies. We report the spectroscopic confirmation of an intrinsically faint Lyman break galaxy (LBG) identified as a z{sub 850LP}-band dropout behind the Bullet Cluster. We detect an emission line at {lambda} = 9412 A at >5{sigma} significance using a 16 hr long exposure with FORS2 VLT. Based on the absence of flux in bluer broadband filters, the blue color of the source, and the absence of additional lines, we identify the line as Ly{alpha} at z = 6.740 {+-} 0.003. The integrated line flux is f = (0.7 {+-} 0.1 {+-} 0.3) Multiplication-Sign 10{sup -17} erg{sup -1} s{sup -1} cm{sup -2} (the uncertainties are due to random and flux calibration errors, respectively) making it the faintest Ly{alpha} flux detected at these redshifts. Given the magnification of {mu} = 3.0 {+-} 0.2 the intrinsic (corrected for lensing) flux is f {sup int} = (0.23 {+-} 0.03 {+-} 0.10 {+-} 0.02) Multiplication-Sign 10{sup -17} erg{sup -1} s{sup -1} cm{sup -2} (additional uncertainty due to magnification), which is {approx}2-3 times fainter than other such measurements in z {approx} 7 galaxies. The intrinsic H{sub 160W}-band magnitude of the object is m{sup int}{sub H{sub 1{sub 6{sub 0{sub W}}}}}=27.57{+-}0.17, corresponding to 0.5 L* for LBGs at these redshifts. The galaxy is one of the two sub-L* LBG galaxies spectroscopically confirmed at these high redshifts (the other is also a lensed z = 7.045 galaxy), making it a valuable probe for the neutral hydrogen fraction in the early universe.

  14. Neutral interstellar hydrogen in the inner heliosphere under the influence of wavelength-dependent solar radiation pressure

    E-Print Network [OSTI]

    S. Tarnopolski; M. Bzowski

    2008-12-04T23:59:59.000Z

    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.

  15. 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

    2002-05-24T23:59:59.000Z

    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.

  16. BEAM DYNAMICS IN NS-FFAG EMMAWITH DYNAMICAL MAPS

    E-Print Network [OSTI]

    Giboudot, Y; Edgecock, R; Wolski, A

    2010-01-01T23:59:59.000Z

    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 ...

  17. Isoorientin induces apoptosis through mitochondrial dysfunction and inhibition of PI3K/Akt signaling pathway in HepG2 cancer cells

    SciTech Connect (OSTI)

    Yuan, Li; Wang, Jing; Xiao, Haifang; Xiao, Chunxia; Wang, Yutang; Liu, Xuebo, E-mail: xueboliu@yahoo.com.cn

    2012-11-15T23:59:59.000Z

    Isoorientin (ISO) is a flavonoid compound that can be extracted from several plant species, such as Phyllostachys pubescens, Patrinia, and Drosophyllum lusitanicum; however, its biological activity remains poorly understood. The present study investigated the effects and putative mechanism of apoptosis induced by ISO in human hepatoblastoma cancer (HepG2) cells. The results showed that ISO induced cell death in a dose-dependent manner in HepG2 cells, but no toxicity in human liver cells (HL-7702) and buffalo rat liver cells (BRL-3A) treated with ISO at the indicated concentrations. ISO-induced cell death included apoptosis which characterized by the appearance of nuclear shrinkage, the cleavage of poly (ADP-ribose) polymerase (PARP) and DNA fragmentation. ISO significantly (p < 0.01) increased the Bax/Bcl-2 ratio, disrupted the mitochondrial membrane potential (MMP), increased the release of cytochrome c, activated caspase-3, and enhanced intracellular levels of reactive oxygen species (ROS) and nitric oxide (NO). In addition, ISO effectively inhibited the phosphorylation of Akt and increased FoxO4 expression. The PI3K/Akt inhibitor LY294002 enhanced the apoptosis-inducing effect of ISO. However, LY294002 markedly quenched ROS and NO generation and diminished the protein expression of heme peroxidase enzyme (HO-1) and inducible nitric oxide synthase (iNOS). Furthermore, the addition of a ROS inhibitor (N-acetyl cysteine, NAC) or iNOS inhibitor (N-[3-(aminomethyl) benzyl] acetamidine, dihydrochloride, 1400W) significantly diminished the apoptosis induced by ISO and also blocked the phosphorylation of Akt. These results demonstrated for the first time that ISO induces apoptosis in HepG2 cells and indicate that this apoptosis might be mediated through mitochondrial dysfunction and PI3K/Akt signaling pathway, and has no toxicity in normal liver cells, suggesting that ISO may have good potential as a therapeutic and chemopreventive agent for liver cancer. Highlights: ? Isoorientin induced apoptosis in HepG2 cells. ? Isoorientin disordered mitochondrial function and inhibited PI3K/AKt pathway. ? PI3K/Akt pathway mediated mitochondrial dysfunction via Bcl-2 family members. ? Isoorientin stimulated the intracellular ROS and NO generation in HepG2 cells. ? ROS and NO initiated mitochondria dysfunction and involved in PI3K/Akt pathway.

  18. 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

    2013-11-01T23:59:59.000Z

    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.

  19. 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)

    2013-06-01T23:59:59.000Z

    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.

  20. On the afterglow and host galaxy of GRB 021004: A comprehensivestudy with the Hubble Space Telescope1

    SciTech Connect (OSTI)

    Fynbo, J.P.U.; Gorosabel, J.; Smette, A.; Fruchter, A.; Hjorth,J.; Pedersen, K.; Levan, A.; Burud, I.; Sahu, K.; Vreeswijk, P.M.; Bergeron, E.; Kouveliotou1, C.; Tanvir, N.; Thorsett11, S.E.; Wijers,R.A.M.J.; Castro Ceron, J.M.; Castro-Tirado, A.; Garnavich, P.; Holland,S.T.; Jakobsson, P.; Moller, P.; Nugent, P.; Pian, E.; Rhoads, J.; Thomsen, B.; Watson, D.; Woosley, S.

    2004-12-01T23:59:59.000Z

    We report on Hubble Space Telescope (HST) observations of the late-time afterglow and host galaxy of GRB 021004 (z = 2.33).Although this gamma-ray burst (GRB) is one of the best observed so far in terms of sampling in the time domain, multi-wavelength coverage and polarimetric observations, there is large disagreement between different measurements and interpretations of this burst in the literature. We have observed the field of GRB 021004 with the HST at multiple epochs from 3 days until almost 10 months after the burst. With STI S prism and G430L spectroscopy we cover the spectral region from about 2000 Angstrom to 5700 Angstrom corresponding to 600 1700 Angstrom in the rest frame. From the limit on the flux recovery bluewards of the Lyman-limit we constrain the H I column density to be above 1 x 1018 cm-2 (5 sigma). Based on ACS and N ICMOS imaging we find that the afterglow evolved a chromatically within the errors (any variation must be less then 5 percent) during the period of HST observations. The color changes observed by other authors during the first four days must be related to a 'noisy' phenomenon superimposed on an afterglow component with a constant spectral shape. This also means that the cooling break has remained on the blue side of the optical part of the spectrum for at least two weeks after the explosion. The optical to X-ray slope OX is consistent with being the same at 1.4 and 52.4 days after the burst. This indicates that the cooling frequency is constant and hence, according to fireball models, that the circumburst medium has a constant density profile. The late-time slope of the light curve (alpha 2, F nu proportional to t-alpha2) is in the range 2 = 1.8-1.9, although inconsistent with a single power-law. This could be due to a late-time flattening caused by the transition to non-relativistic expansion or due to excess emission (a 'bump' in the light curve) about 7 days afterburst. The host galaxy is like most previously studied GRB hosts a (very) blue starburst galaxy with no evidence for dust and with strong Ly emission. The star-formation rate of the host is about 10 M solar mass yr-1 based on both the strength of the UV continuum and on the Ly alpha luminosity. The spectral energy distribution of the host implies an age in the range 30-100 Myr for the dominant stellar population.

  1. Insulin-like growth factor 1 enhances the migratory capacity of mesenchymal stem cells

    SciTech Connect (OSTI)

    Li, Yangxin [Laboratory of Heart Failure and Stem Cell, Texas Heart Institute, Houston, TX 77030 (United States)]. E-mail: Yangxin_li@yahoo.com; Yu, XiYong [Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Provincial Cardiovascular Institute, Guanzhou, Guandong 510080 (China)]. E-mail: yuxycn@hotmail.com; Lin, ShuGuang [Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Provincial Cardiovascular Institute, Guanzhou, Guandong 510080 (China); Li, XiaoHong [Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Provincial Cardiovascular Institute, Guanzhou, Guandong 510080 (China); Zhang, Saidan [Section of Cardiology, Xiangya Hospital of Central-South University, Changsha, Hunan 410008 (China); Song, Yao-Hua [Department of Molecular Pathology, University of Texas M.D. Anderson Cancer Center, Houston, TX 77030 (United States)

    2007-05-11T23:59:59.000Z

    Mesenchymal stem cells (MSCs) are attractive candidates for cell based therapies. However, the mechanisms responsible for stem cell migration and homing after transplantation remain unknown. It has been shown that insulin-like growth factor-1 (IGF-1) induces proliferation and migration of some cell types, but its effects on stem cells have not been investigated. We isolated and cultured MSC from rat bone marrow, and found that IGF-1 increased the expression levels of the chemokine receptor CXCR4 (receptor for stromal cell-derived factor-1, SDF-1). Moreover, IGF-1 markedly increased the migratory response of MSC to SDF-1. The IGF-1-induced increase in MSC migration in response to SDF-1 was attenuated by PI3 kinase inhibitor (LY294002 and wortmannin) but not by mitogen-activated protein/ERK kinase inhibitor PD98059. Our data indicate that IGF-1 increases MSC migratory responses via CXCR4 chemokine receptor signaling which is PI3/Akt dependent. These findings provide a new paradigm for biological effects of IGF-1 on MSC and have implications for the development of novel stem cell therapeutic strategies.

  2. Activation of the MAP Kinase Cascade by Exogenous Calcium-Sensing Receptor

    SciTech Connect (OSTI)

    Hobson, Susan A.; Wright, Jay W.; Lee, Fred; Mcneil, Scott; Bilderback, Tim R.; Rodland, Karin D.

    2003-02-01T23:59:59.000Z

    In Rat-1 fibroblasts and ovarian surface epithelial cells, extracellular calcium induces a proliferative response which appears to be mediated by the G-protein coupled Calcium-sensing Receptor (CaR), as expression of the non-functional CaR-R795W mutant inhibits both thymidine incorporation and activation of the extracellular-regulated kinase (ERK) in response to calcium. In this report we utilized CaR-transfected HEK293 cells to demonstrate that functional CaR is necessary and sufficient for calcium-induced ERK activation. CaR-dependent ERK activation was blocked by co-expression of the Ras dominant-negative mutant, Ras N17, and by exposure to the phosphatidyl inositol 3' kinase inhibitors wortmannin and LY294002. In contrast to Rat-1 fibroblasts, CaR-mediated in vitro kinase activity of ERK2 was unaffected by tyrosine kinase inhibitor herbimycin in CaR-transfected HEK293 cells. These results suggest that usage of distinct pathways downstream of the CaR varies in a cell-type specific manner, suggesting a potential mechanism by which activation of the CaR could couple to distinct calcium-dependent responses.

  3. 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)

    2013-07-20T23:59:59.000Z

    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.

  4. Probing Unification With Chandra HETGS and XMM-Newton EPIC And RGS Spectroscopy of the Narrow Emission Line Galaxy NGC 2110

    E-Print Network [OSTI]

    Evans, Daniel A; Turner, T Jane; Weaver, Kimberly A; Marshall, Herman L

    2007-01-01T23:59:59.000Z

    We present results from Chandra HETGS (250 ks over two epochs) and XMM-Newton EPIC and RGS (60 ks) observations of NGC 2110, which has been historically classified as a Narrow Emission Line Galaxy galaxy. Our results support the interpretation that the source is a Seyfert 2 viewed through a patchy absorber. The nuclear X-ray spectrum of the source is best described by a power law of photon index $\\Gamma$ ~1.7, modified by absorption from multiple layers of neutral material at a large distance from the central supermassive black hole. We report the strong detections of Fe K$\\alpha$ and Si K$\\alpha$ lines, which are marginally resolved with the Chandra HETGS, and we constrain the emission radius of the fluorescing material to >1 pc. There is some evidence for modest additional broadening at the base of the narrow Fe K$\\alpha$ core with a velocity ~4500 km s$^{-1}$. We find tentative evidence for ionized emission (O VIII Ly $\\alpha$, an O VIII RRC feature, and possibly a Ne IX forbidden line) in the Chandra MEG ...

  5. 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

    1998-06-25T23:59:59.000Z

    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.

  6. 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

    2003-01-01T23:59:59.000Z

    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...

  7. 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

    2003-10-10T23:59:59.000Z

    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.

  8. Intrinsic AGN Absorption Lines

    E-Print Network [OSTI]

    Fred Hamann

    2000-06-12T23:59:59.000Z

    Strong absorption lines are common in rest-frame UV spectra of AGNs due to a variety of resonant transitions, for example the HI Lyman series lines (most notably Ly-alpha 1216) and high-ionization doublets like CIV 1549,1551. The lines are called ``intrinsic'' if the absorbing gas is physically related to the AGN, e.g. if the absorber resides broadly within the radius of the AGN's surrounding ``host'' galaxy. Intrinsic absorption lines are thus valuable probes of the kinematics, physical conditions and elemental abundances in the gas near AGNs. Studies of intrinsic absorbers have historically emphasized the broad absorption lines (BALs) in quasars. Today we recognize a wider variety of intrinsic lines in a wider range of objects. For example, we now know that Seyfert 1 galaxies (the less luminous cousins of quasars) have intrinsic absorption. We also realize that intrinsic lines can form in a range of AGN environments --- from the dynamic inner regions like the BALs, to the more quiescent outer host galaxies >10 kpc away. This article provides a brief introduction to current observational and theoretical work on intrinsic AGN absorbers.

  9. A New Probe of the Planet-Forming Region in T Tauri Disks

    E-Print Network [OSTI]

    Edwin A. Bergin; Nuria Calvet; Michael L. Sitko; Herve Abgrall; Paola D'Alessio; Gregory J. Herczeg; Evelyne Roueff; Chunhua Qi; David K. Lynch; Ray W. Russell; Suellen M. Brafford; R. Brad Perry

    2004-09-13T23:59:59.000Z

    We present new observations of the FUV (1100-2200 Angstrom) radiation field and the near- to mid-IR (3--13.5 micron) spectral energy distribution (SED) of a sample of T Tauri stars selected on the basis of bright molecular disks (GM Aur, DM Tau, LkCa15). In each source we find evidence for Ly alpha induced H2 fluorescence and an additional source of FUV continuum emission below 1700 Angstroms. Comparison of the FUV spectra to a model of H2 excitation suggests that the strong continuum emission is due to electron impact excitation of H2. The ultimate source of this excitation is likely X-ray irradiation which creates hot photo-electrons mixed in the molecular layer. Analysis of the SED of each object finds the presence of inner disk gaps with sizes of a few AU in each of these young (~1 Myr) stellar systems. We propose that the presence of strong H2 continuum emission and inner disk clearing are related by the increased penetration power of high energy photons in gas rich regions with low grain opacity.

  10. High resolution n = 3 to n = 2 spectra of neon-like silver

    SciTech Connect (OSTI)

    Beiersdorfer, P.; Bitter, M.; von Goeler, S.; Cohen, S.; Hill, K.W.; Timberlake, J.; Walling, R.S.; Chen, M.H.; Hagelstein, P.L.; Scofield, J.H.

    1986-04-01T23:59:59.000Z

    Spectra of the n = 3 to n = 2 transitions in neon-like silver emitted from the Princeton Large Torus have been recorded with a high-resolution Bragg-crystal spectrometer. The measurements cover the wavelength region 3.3 to 4.1 A and include the forbidden 3p ..-->.. 2p electric quadrupole lines. Transitions in the adjacent sodium-like, and aluminum-like charge states of silver have also been observed and identified. The Ly-..cap alpha.. spectra of hydrogen-like argon and iron, the K..cap alpha.. spectra of helium-like argon, potassium, manganese, and iron, and the K..beta.. spectrum of helium-like argon fall in the same wavelength region in first or second order and have been measured concurrently. These spectra provide a coherent set of wavelength reference data obtained with the same spectrometer and from the same tokamak. This set is used as a basis to compare wavelength predictions for one- and two-electron systems to each other and to determine the transition energies of the silver lines with great accuracy.

  11. A dusty, normal galaxy in the epoch of reionization

    E-Print Network [OSTI]

    Watson, Darach; Knudsen, Kirsten Kraiberg; Richard, Johan; Gallazzi, Anna; Micha?owski, Micha? Jerzy

    2015-01-01T23:59:59.000Z

    Candidates for the modest galaxies that formed most of the stars in the early universe, at redshifts $z > 7$, have been found in large numbers with extremely deep restframe-UV imaging. But it has proved difficult for existing spectrographs to characterise them in the UV. The detailed properties of these galaxies could be measured from dust and cool gas emission at far-infrared wavelengths if the galaxies have become sufficiently enriched in dust and metals. So far, however, the most distant UV-selected galaxy detected in dust emission is only at $z = 3.25$, and recent results have cast doubt on whether dust and molecules can be found in typical galaxies at this early epoch. Here we report thermal dust emission from an archetypal early universe star-forming galaxy, A1689-zD1. We detect its stellar continuum in spectroscopy and determine its redshift to be $z = 7.5\\pm0.2$ from a spectroscopic detection of the Ly{\\alpha} break. A1689-zD1 is representative of the star-forming population during reionisation, with ...

  12. The content literacy continuum: A school reform framework for improving adolescent literacy for all student

    E-Print Network [OSTI]

    Lenz, B. Keith; Ehren, Barbara J.; Deshler, Donald D.

    2005-01-01T23:59:59.000Z

    , de ve l te nt su ch a Dn o f c o n la ni pu la tii E e co n -1 .^ g- G a t s tu de nt ! 1 i n w a ys th i p 0) -p -G n in g, o r e va lu at in g. ig, qu es tio i co m pa rir n a lo gi es . G ro ac h- Q- O. ive /e ll a s a ct m a tio... pp ly : pr oc es s c de nt s ho ' Bm an ds . u rs o u E o , tu to i ho ol or th ro ug h be yo nd -s c te co u rs e . a se pa ra ffe rin g o f o 1 m on -T3 po 0 "1 'c d) "G i/i te ac he r; E = 1 cu rr i :o re p 1 2 c sc re e n in g a n d o...

  13. The influence of certain management practices upon market quality and profit made in broiler production

    E-Print Network [OSTI]

    Moore, William J

    1951-01-01T23:59:59.000Z

    ~ ~ ~~ ~ gpwrgg e yeg ~ %aeter ~ ~ gharry ~ m ~ ~~ ~ emm ~ ~ ~ m M~~ ~ M ~~~ x~~ ~ ~~ Qcsx) ~ ~ ~m ~ 'sm ~~'C gG 4~+XKIE . G~~. LY, ' '3r. , C $(; 'ClGT~~OVJ'&' M Hp, , GXlCi' jT ~ ZQQ 629 jQ ~ Qf ~ (5L Q pkYXSfQQQ pRG' Sg~gK~ RXQVpCQ jQ @AGl, v Wj. kX 44jw... ~ ~ xys ~ yeysaC ~ ?s~ Seyayyee ~ ethsynaaya +8++ ~ & ~ ~ aeg Aep aaK sea ~ ~ 0 K g~ V~~+% + % X~+@~4 %+8 ~ %~%K P++ ~ %%~~~~ P~@~% @4 m m ~~m4@va ~ ~~ ~ ~m g%z) m m '~ ~pSSSCkZQC$ ~? ~~~ ~ pKS ~~ Sg. ~ gD' zgG "M:fwG-BZgf- ~~ P ~+ -$ gg & ~i~~ ~y &'L...

  14. 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

    2014-04-20T23:59:59.000Z

    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.

  15. CHARGE-EXCHANGE LIMITS ON LOW-ENERGY {alpha}-PARTICLE FLUXES IN SOLAR FLARES

    SciTech Connect (OSTI)

    Hudson, H. S. [SSL, UC Berkeley, CA 94720 (United States); Fletcher, L.; MacKinnon, A. L. [School of Physics and Astronomy, SUPA, University of Glasgow, Glasgow G12 8QQ (United Kingdom); Woods, T. N., E-mail: hhudson@ssl.berkeley.edu [Laboratory for Atmospheric and Space Physics, University of Colorado, 1234 Innovation Dr., Boulder, CO 80303 (United States)

    2012-06-20T23:59:59.000Z

    This paper reports on a search for flare emission via charge-exchange radiation in the wings of the Ly{alpha} line of He II at 304 A, as originally suggested for hydrogen by Orrall and Zirker. Via this mechanism a primary {alpha} particle that penetrates into the neutral chromosphere can pick up an atomic electron and emit in the He II bound-bound spectrum before it stops. The Extreme-ultraviolet Variability Experiment on board the Solar Dynamics Observatory gives us our first chance to search for this effect systematically. The Orrall-Zirker mechanism has great importance for flare physics because of the essential roles that particle acceleration plays; this mechanism is one of the few proposed that would allow remote sensing of primary accelerated particles below a few MeV nucleon{sup -1}. We study 10 events in total, including the {gamma}-ray events SOL2010-06-12 (M2.0) and SOL2011-02-24 (M3.5) (the latter a limb flare), seven X-class flares, and one prominent M-class event that produced solar energetic particles. The absence of charge-exchange line wings may point to a need for more complete theoretical work. Some of the events do have broadband signatures, which could correspond to continua from other origins, but these do not have the spectral signatures expected from the Orrall-Zirker mechanism.

  16. The Ionized Absorber and Nuclear Environment of IRAS 13349+2438: Multi-wavelength insights from coordinated Chandra HETGS, HST STIS, HET, and Spitzer IRS

    E-Print Network [OSTI]

    Lee, Julia C; Chakravorty, Susmita; Rahoui, Farid; Young, Andrew J; Brandt, William N; Hines, Dean C; Ogle, Patrick M; Reynolds, Christopher S

    2013-01-01T23:59:59.000Z

    We present results from a coordinated IR-to-X-ray spectral campaign of the QSO IRAS 13349+2438. Optical spectra reveal extreme Eigenvector-1 characteristics, but the H-beta line width argues against a NLS1 classification; we refine z=0.10853 based on [O III]. We estimate a BH mass=10^9 Msun using 2 independent methods (H-beta line width & SED fits). Blue-shifted absorption (-950km/s & -75km/s) is seen for the 1st time in STIS UV spectra from Ly-alpha, NV, & CIV. The higher velocity UV lines are coincident with the lower-ionisation (xi~1.6) X-ray warm absorber lines. A dusty multiple ionization absorber blueshifted by 700-900km/s is required to fit the X-ray data. Theoretical models comparing different ionising SEDs reveal that a UV-inclusive (i.e., the accretion disc) ionising continuum strongly impacts conclusions for the thermodynamic stability of the warm absorber. Specific to IRAS13349, an Xray-UV ionising SED favors a continuous distribution of ionisation states in a smooth flow (this paper),...

  17. A Survey of z>5.8 Quasars in the Sloan Digital Sky Survey I: Discovery of Three New Quasars and the Spatial Density of Luminous Quasars at z~6

    E-Print Network [OSTI]

    Xiaohui Fan; Vijay K. Narayanan; Robert H. Lupton; Michael A. Strauss; Gillian R. Knapp; Robert H. Becker; Richard L. White; Laura Pentericci; S. K. Leggett; Zoltan Haiman; James E. Gunn; Zeljko Ivezic; Donald P. Schneider

    2001-09-03T23:59:59.000Z

    We present the results from a survey of i-dropout objects selected from ~1550 deg^2 of multicolor imaging data from the Sloan Digital Sky Survey, to search for luminous quasars at z>5.8. Objects with i*-z*>2.2 and z* 0.90. The ARC 3.5m spectrum of the z=6.28 quasar shows that over a range of 300 A immediately blueward of the Ly alpha emission, the average transmitted flux is only 0.003 +/-0.020 times that of the continuum level, consistent with zero flux, and suggesting a tentative detection of the complete Gunn-Peterson trough. The existence of strong metal lines suggests early chemical enrichment in the quasar enviornment. The three new objects, together with the previously published z=5.8 quasar form a complete color-selected flux-limited sample at z>5.8. We estimate that at $z=6$, the comoving density of luminous quasars at M_1450 luminous quasars discussed in the paper have central black hole masses of several times 10^9 M_sun by the Eddington argument. Their observed space density provides a sensitive test of models of quasar and galaxy formation at high redshift. (Abridged)

  18. The Eighth Data Release of the Sloan Digital Sky Survey: First Data from SDSS-III

    SciTech Connect (OSTI)

    Aihara, Hiroaki; /Tokyo U.; Prieto, Carlos Allende; /Laguna U., Tenerife; An, Deokkeun; /Ewha Women's U., Seoul; Anderson, Scott F.; /Washington U., Seattle, Astron. Dept.; Aubourg, Eric; /APC, Paris /DAPNIA, Saclay; Balbinot, Eduardo; /Rio Grande do Sul U. /Rio de Janeiro Observ.; Beers, Timothy C.; /Michigan State U.; Berlind, Andreas A.; /Vanderbilt U.; Bickerton, Steven J.; /Princeton U.; Bizyaev, Dmitry; /Apache Point Observ.; Blanton, Michael R.; /New York U., CCPP /Penn State U.

    2011-01-01T23:59:59.000Z

    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.

  19. Measurements of Martin-Puplett Interferometer Limitations using Blackbody Source

    SciTech Connect (OSTI)

    Evtushenko, Pavel E. [JLAB; Klopf, John M. [JLAB

    2013-06-01T23:59:59.000Z

    Frequency domain measurements with Martin-Puplett interferometer is one of a few techniques capable of bunch length measurements at the level of ~ 100 fs. As the bunch length becomes shorter, it is important to know and be able to measure the limitations of the instrument in terms of shortest measurable bunch length. In this paper we describe an experiment using a blackbody source with the modified Martin-Puplett interferometer that is routine- ly used for bunch length measurements at the JLab FEL, as a way to estimate the shortest, measurable bunch length. The limitation comes from high frequency cut-off of the wire-grid polarizer currently used and is estimated to be 50 fs RMS. The measurements are made with the same Golay cell detector that is used for beam measure- ments. We demonstrate that, even though the blackbody source is many orders of magnitude less bright than the coherent transition or synchrotron radiation, it can be used for the measurements and gives a very good signal to noise ratio in combination with lock-in detection. We also compare the measurements made in air and in vacuum to characterize the very strong effect of the atmospheric absorption.

  20. The role of filament activation in a solar eruption

    E-Print Network [OSTI]

    da Costa, Fatima Rubio; Fletcher, Lyndsay; Romano, Paolo; Labrosse, Nicolas

    2014-01-01T23:59:59.000Z

    Observations show that the mutual relationship between filament eruptions and solar flares cannot be described in terms of an unique scenario. In some cases, the eruption of a filament appears to trigger a flare, while in others the observations are more consistent with magnetic reconnection that produces both the flare observational signatures (e.g., ribbons, plasma jets, post-flare loops, etc.) and later the destabilization and eruption of a filament. We study an event which occurred in NOAA 8471, where a flare and the activation of (at least) two filaments were observed on 28 February 1999. By using imaging data acquired in the 1216, 1600, 171 and 195 \\AA\\ TRACE channels and by BBSO in the continnum and in H$\\alpha$, a morphological study of the event is carried out. Using TRACE 1216 and 1600 \\AA\\ data, an estimate of the "pure" Ly$\\alpha$ power is obtained. The extrapolation of the magnetic field lines is done using the SOHO/MDI magnetograms and assuming a potential field. The potential magnetic field ext...

  1. 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

    2000-05-08T23:59:59.000Z

    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.

  2. 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

    2002-07-08T23:59:59.000Z

    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).

  3. The Effect of Proton Temperature Anisotropy on the Solar Minimum Corona and Wind

    E-Print Network [OSTI]

    Alberto M. Vasquez; Adriaan A. van Ballegooijen; John C. Raymond

    2003-10-29T23:59:59.000Z

    A semi-empirical, axisymmetric model of the solar minimum corona is developed by solving the equations for conservation of mass and momentum with prescribed anisotropic temperature distributions. In the high-latitude regions, the proton temperature anisotropy is strong and the associated mirror force plays an important role in driving the fast solar wind; the critical point where the outflow velocity equals the parallel sound speed is reached already at 1.5 Rsun from Sun center. The slow wind arises from a region with open field lines and weak anisotropy surrounding the equatorial streamer belt. The model parameters were chosen to reproduce the observed latitudinal extent of the equatorial streamer in the corona and at large distance from the Sun. We find that the magnetic cusp of the closed-field streamer core lies at about 1.95 Rsun. The transition from fast to slow wind is due to a decrease in temperature anisotropy combined with the non-monotonic behavior of the non-radial expansion factor in flow tubes that pass near the streamer cusp. In the slow wind, the plasma beta is of order unity and the critical point lies at about 5 Rsun, well beyond the magnetic cusp. The predicted outflow velocities are consistent with OVI Doppler dimming measurements from UVCS/SOHO. We also find good agreement with polarized brightness (pB) measurements from LASCO/SOHO and HI Ly-alpha images from UVCS/SOHO.

  4. The consistency test on the cosmic evolution

    E-Print Network [OSTI]

    Gong, Yan; Zhang, Shuang-Nan; Chen, Xuelei

    2015-01-01T23:59:59.000Z

    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

  5. The Baldwin Effect and Black Hole Accretion: A Spectral Principal Component Analysis of a Complete QSO Sample

    E-Print Network [OSTI]

    Zhaohui Shang; Beverley J. Wills; Edward L. Robinson; D. Wills; Ari Laor; Bingrong Xie; Juntao Yuan

    2002-11-29T23:59:59.000Z

    A unique set of UV-optical spectrograms of 22 low redshift QSOs are investigated using principal component analysis. We find three significant principal components over the broad wavelength range from Ly\\alpha to H\\alpha. They together account for about 78% of the sample intrinsic variance. We present strong arguments that the first principal component represents the Baldwin effect, relating equivalent widths to the luminosity (i.e. accretion rate), but only emission-line cores are involved. The second component represents continuum variations, probably dominated by intrinsic reddening. The third principal component directly relates QSO UV properties to the optical principal component 1 found by Boroson & Green (1992). It is the primary cause of scatter in the Baldwin relationships. It is also directly related to broad emission-line width and soft X-ray spectral index, and therefore probably driven by Eddington accretion ratio. We demonstrate how Baldwin relationships can be derived using our first principal component, virtually eliminating the scatter caused by the third principal component. This rekindles the hope that the Baldwin relationships can be used for cosmological study.

  6. 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

    2015-01-01T23:59:59.000Z

    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 ...

  7. Open clusters in dense fields: the importance of field-star decontamination for NGC5715, Lynga4, Lynga9, Trumpler23, Trumpler26 and Czernik37

    E-Print Network [OSTI]

    Bonatto, C; Bonatto, Charles; Bica, Eduardo

    2007-01-01T23:59:59.000Z

    Star clusters projected onto dense stellar fields require field star decontamination to confirm their nature and derive intrinsic photometric and structural fundamental parameters. The present work focusses on the OCs or candidates NGC5715, Lynga4,9, Trumpler23,26 and Czernik37 which are projected against crowded bulge and/or disc fields. We develop a CMD field star decontamination algorithm based on 2MASS data, and respective uncertainties, to detect cluster star excesses over the background. On the other hand, colour-magnitude filters are used to build stellar radial density profiles and mass functions. The results convey compelling evidence that Ly9 and Cz37 are intermediate-age open clusters, and their fundamental parameters are measured for the first time. Tr23 is a particularly challenging object, since besides high background level, its field presents variable absorption in near-IR bands. We confirm it to be an intermediate-age open cluster. These OCs are located 0.9 - 1.6kpc within the Solar Circle, w...

  8. Density-functional calculations on singly and doubly excited Rydberg states of many-electron atoms

    E-Print Network [OSTI]

    Chu, Shih-I; Roy, Amlan K.

    2002-05-07T23:59:59.000Z

    gl c a te re sin n- !. ati re ad d H . T ro q ly tim ul pressible as dE @ r # /dr @as in the usual Kohn-Sham ~KS! PHYSICAL REVIEW A, VOLUME 65, 052508Hohenberg-Kohn theorem for a general excited state parallel to the ground state, and the lack....311 90c 1s25p 2P 7.257 56 7.300 53 ~0.0031! 7.300 30c Be 1s22s3s 3S 14.377 98 14.429 17 ~0.1996! 14.426 29e 1s22s4s 3S 14.325 06 14.370 90 1s22s5s 3S 14.305 62 14.349 96 1s22s2p 3P 14.510 68 14.566 60 ~0.0300! 14.562 23e 14.511 50d 1s22s3p 3P 14.348 26 14...

  9. EFFECT OF HALO BIAS AND LYMAN LIMIT SYSTEMS ON THE HISTORY OF COSMIC REIONIZATION

    SciTech Connect (OSTI)

    Kaurov, Alexander A.; Gnedin, Nickolay Y., E-mail: kaurov@uchicago.edu, E-mail: gnedin@fnal.gov [Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 (United States)

    2013-07-01T23:59:59.000Z

    We extend the existing analytical model of reionization by Furlanetto et al. to include the biasing of reionization sources and additional absorption by Lyman limit systems. Both effects enhance the original model in non-trivial ways, but do not change its qualitative features. Our model is, by construction, consistent with the observed evolution of the galaxy luminosity function at z {approx}< 8 and with the observed evolution of Ly{alpha} forest at z {approx}< 6. We find that the same model can match the Wilkinson Microwave Anisotropy Probe/Planck constraint on the Thompson optical depth and the South Pole Telescope and EDGES constraints on the duration of reionization for values of the relative escape fraction that are consistent with the observational measurements at lower redshifts. However, such a match is only possible if dwarf galaxies contribute substantially to the ionizing photon budget. The latter condition is inconsistent with simulations and observational upper limits on the escape fraction from dwarfs at z {approx} 3. Whether such a disagreement is due to the different nature of z > 6 galaxies, the inadequacy of simulations and/or some of the observational constraints, or indicates an additional source of ionizing radiation at z > 8 remains to be seen.

  10. On the enrichment of the intergalactic medium by galactic winds

    E-Print Network [OSTI]

    Biman Nath; Neil Trentham

    1997-07-16T23:59:59.000Z

    Observations of metal lines in $\\lyal$ absorption systems of small H~I column density and their ubiquitous nature suggest that the intergalactic medium (IGM) was enriched to about $Z \\sim 0.01 \\> Z_{\\odot}$ by a redshift $z \\sim 3$. We investigate the role of winds from small star-forming galaxies at high $z$ in enriching the IGM. The existence of large numbers of small galaxies at high $z$ follows naturally from hierarchical clustering theories (e.g. CDM). For analytical simplicity we assume that the galactic winds escape the galaxies at a single characteristic redshift $z_{in}$, and we model the galactic winds as spherical shock waves propagating through the IGM. We then calculate the probability distribution of the metallicity of the IGM, as a function of time (for different values of $z_{in}$), adopting plausible galaxy mass functions (from Press-Schechter formalism), cooling physics, star-formation efficiencies, gas ejection dynamics, and nucleosynthesis yields. We compare this expected distribution with the observed distribution of metallicities in the Ly$\\alpha$ forest at $z=3$, the metal poor stars in the halo of our Galaxy, and with other observational constraints on such a scenario. We find that galactic winds at high $z$ could have enriched the IGM to a mean metallicity of $Z \\sim 0.01 Z_{\\odot}$ at $z \\sim 3$, with a standard deviation of the same order, if $z_{in} \\la 5$, and that this satisfies all the observational constraints.

  11. THE SDSS-III BARYON OSCILLATION SPECTROSCOPIC SURVEY: QUASAR TARGET SELECTION FOR DATA RELEASE NINE

    SciTech Connect (OSTI)

    Ross, Nicholas P.; Kirkpatrick, Jessica A.; Carithers, William C.; Ho, Shirley [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States); Myers, Adam D. [Department of Astronomy, MC-221, University of Illinois, 1002 West Green Street, Urbana, IL 61801 (United States); Sheldon, Erin S. [Brookhaven National Laboratory, Blgd 510, Upton, NY 11375 (United States); Yeche, Christophe; Aubourg, Eric [CEA, Centre de Saclay, IRFU, 91191 Gif-sur-Yvette (France); Strauss, Michael A.; Lee, Khee-Gan [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States); Bovy, Jo; Blanton, Michael R.; Hogg, David W. [Center for Cosmology and Particle Physics, New York University, 4 Washington Place, New York, NY 10003 (United States); Richards, Gordon T. [Department of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104 (United States); Brandt, W. N. [Department of Astronomy and Astrophysics, The Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 (United States); Croft, Rupert A. C. [Bruce and Astrid McWilliams Center for Cosmology, Carnegie Mellon University, Pittsburgh, PA 15213 (United States); Da Silva, Robert [Department of Astronomy and Astrophysics, University of California, Santa Cruz, Santa Cruz, CA 95064 (United States); Dawson, Kyle [Department of Physics and Astronomy, University of Utah, UT (United States); Eisenstein, Daniel J. [Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Hennawi, Joseph F., E-mail: npross@lbl.gov [Max-Planck-Institut fuer Astronomie, Konigstuhl 17, 69117 Heidelberg (Germany); and others

    2012-03-01T23:59:59.000Z

    The SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS), a five-year spectroscopic survey of 10,000 deg{sup 2}, achieved first light in late 2009. One of the key goals of BOSS is to measure the signature of baryon acoustic oscillations (BAOs) in the distribution of Ly{alpha} absorption from the spectra of a sample of {approx}150,000 z > 2.2 quasars. Along with measuring the angular diameter distance at z Almost-Equal-To 2.5, BOSS will provide the first direct measurement of the expansion rate of the universe at z > 2. One of the biggest challenges in achieving this goal is an efficient target selection algorithm for quasars in the redshift range 2.2 < z < 3.5, where their colors tend to overlap those of the far more numerous stars. During the first year of the BOSS survey, quasar target selection (QTS) methods were developed and tested to meet the requirement of delivering at least 15 quasars deg{sup -2} in this redshift range, with a goal of 20 out of 40 targets deg{sup -2} allocated to the quasar survey. To achieve these surface densities, the magnitude limit of the quasar targets was set at g {<=} 22.0 or r {<=} 21.85. While detection of the BAO signature in the distribution of Ly{alpha} absorption in quasar spectra does not require a uniform target selection algorithm, many other astrophysical studies do. We have therefore defined a uniformly selected subsample of 20 targets deg{sup -2}, for which the selection efficiency is just over 50% ({approx}10 z > 2.20 quasars deg{sup -2}). This 'CORE' subsample will be fixed for Years Two through Five of the survey. For the remaining 20 targets deg{sup -2}, we will continue to develop improved selection techniques, including the use of additional data sets beyond the Sloan Digital Sky Survey (SDSS) imaging data. In this paper, we describe the evolution and implementation of the BOSS QTS algorithms during the first two years of BOSS operations (through 2011 July), in support of the science investigations based on these data, and we analyze the spectra obtained during the first year. During this year, 11,263 new z > 2.20 quasars were spectroscopically confirmed by BOSS, roughly double the number of previously known quasars with z > 2.20. Our current algorithms select an average of 15 z > 2.20 quasars deg{sup -2} from 40 targets deg{sup -2} using single-epoch SDSS imaging. Multi-epoch optical data and data at other wavelengths can further improve the efficiency and completeness of BOSS QTS.

  12. WATER PRODUCTION IN COMETS 2001 Q4 (NEAT) AND 2002 T7 (LINEAR) DETERMINED FROM SOHO/SWAN OBSERVATIONS

    SciTech Connect (OSTI)

    Combi, M. R.; Lee, Y. [Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, 2455 Hayward Street, Ann Arbor, MI 48109-2143 (United States); Maekinen, J. T. T. [Finnish Meteorological Institute, Box 503, SF-00101 Helsinki (Finland); Bertaux, J.-L.; Quemerais, E. [Centre National de la Recherche Scientifique, Service d'Aeronomie, BP3, 91371 Verrieres le Buisson Cedex (France)], E-mail: mcombi@umich.edu

    2009-06-15T23:59:59.000Z

    The SWAN all-sky camera on the Solar and Heliospheric Observatory (SOHO) spacecraft detected the hydrogen Lyman-alpha (Ly{alpha}) comae of comets 2001 Q4 NEAT and 2002 T7 LINEAR for large portions of their perihelion apparitions in 2003 and 2004. C/2001 Q4 NEAT was observed from 2003 September 14 through 2004 November 2, covering heliocentric distances from 3.23 AU before perihelion to 2.75 AU after, and C/2002 T7 LINEAR was observed from 2003 December 4 through 2004 August 6, covering heliocentric distances from 2.52 AU before perihelion to 2.09 AU after. We combined the full set of comet specific and full-sky observations and used our time-resolved model (TRM), which enables us to extract continuous values of the daily-average value of the water production rate throughout most of this entire period. The average power-law fit to the production rate variation of C/2001 Q4 NEAT with heliocentric distance, r, gives 3.5 x 10{sup 29} r {sup -1.7} and that for C/2002 T7 LINEAR gives 4.6 x 10{sup 29} r {sup -2.0}. Both comets show roughly a factor of 2 asymmetry in activity about perihelion, being more active before perihelion. C/2001 Q4 NEAT showed a production rate outburst about 30 days before perihelion (2004 April 15) and then a large extended increase above the nominal trend from 50 to 70 days after perihelion (2004 July 5-July 25)

  13. DISCOVERY OF A PROTOCLUSTER AT z {approx} 6

    SciTech Connect (OSTI)

    Toshikawa, Jun; Kashikawa, Nobunari; Shibuya, Takatoshi; Ishizaki, Yoshifumi [Department of Astronomy, School of Science, Graduate University for Advanced Studies, Mitaka, Tokyo 181-8588 (Japan); Ota, Kazuaki; Nagao, Tohru [Department of Astronomy, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan); Morokuma, Tomoki; Motohara, Kentaro [Institute of Astronomy, University of Tokyo, Mitaka, Tokyo 181-0015 (Japan); Hayashi, Masao [Optical and Infrared Astronomy Division, National Astronomical Observatory, Mitaka, Tokyo 181-8588 (Japan); Jiang, Linhua; Egami, Eiichi [Steward Observatory, University of Arizona, 933 North Chery Avenue, Tucson, AZ 85721 (United States); Malkan, Matthew A. [Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1547 (United States); Shimasaku, Kazuhiro, E-mail: jun.toshikawa@nao.ac.jp [Department of Astronomy, University of Tokyo, Hongo, Tokyo 113-0033 (Japan)

    2012-05-10T23:59:59.000Z

    We report the discovery of a protocluster at z {approx} 6 containing at least eight cluster member galaxies with spectroscopic confirmations in the wide-field image of the Subaru Deep Field (SDF). The overdensity of the protocluster is significant at the 6{sigma} level, based on the surface number density of i'-dropout galaxies. The overdense region covers {approx}6' Multiplication-Sign 6' (14 Mpc Multiplication-Sign 14 Mpc in comoving units at z = 6) and includes 30 i'-dropout galaxies. Follow-up spectroscopy revealed that 15 of these are real z {approx} 6 galaxies (5.7 < z < 6.3). Of these 15, 8 are clustering in a narrow redshift range ({Delta}z < 0.05 centered at z = 6.01), corresponding to a seven-fold increase in number density over the average in redshift space. We found no significant difference in the observed properties, such as Ly{alpha} luminosities and UV continuum magnitudes, between the eight protocluster members and the seven non-members. The velocity dispersion of the eight protocluster members is 647 {+-} 124 km s{sup -1}, which is about three times higher than that predicted by the standard cold dark matter model. This discrepancy could be attributed to the distinguishing three-dimensional distribution of the eight protocluster members. We discuss two possible explanations for this discrepancy: either the protocluster is already mature, with old galaxies at the center, or it is still immature and composed of three subgroups merging to become a larger cluster. In either case, this concentration of z = 6.01 galaxies in the SDF may be one of the first sites of formation of a galaxy cluster in the universe.

  14. Probing Unification With Chandra HETGS and XMM-Newton EPIC And RGS Spectroscopy of the Narrow Emission Line Galaxy NGC 2110

    E-Print Network [OSTI]

    Daniel A. Evans; Julia C. Lee; T. Jane Turner; Kimberly A. Weaver; Herman L. Marshall

    2007-08-30T23:59:59.000Z

    We present results from Chandra HETGS (250 ks over two epochs) and XMM-Newton EPIC and RGS (60 ks) observations of NGC 2110, which has been historically classified as a Narrow Emission Line Galaxy galaxy. Our results support the interpretation that the source is a Seyfert 2 viewed through a patchy absorber. The nuclear X-ray spectrum of the source is best described by a power law of photon index $\\Gamma$ ~1.7, modified by absorption from multiple layers of neutral material at a large distance from the central supermassive black hole. We report the strong detections of Fe K$\\alpha$ and Si K$\\alpha$ lines, which are marginally resolved with the Chandra HETGS, and we constrain the emission radius of the fluorescing material to >1 pc. There is some evidence for modest additional broadening at the base of the narrow Fe K$\\alpha$ core with a velocity ~4500 km s$^{-1}$. We find tentative evidence for ionized emission (O VIII Ly $\\alpha$, an O VIII RRC feature, and possibly a Ne IX forbidden line) in the Chandra MEG and XMM-Newton RGS spectra, which could be associated with the known extended X-ray emission that lies ~160 pc from the nucleus. We suggest that the $10^{23}$ cm$^{-2}$ partially covering absorber originates in broad-line region clouds in the vicinity of the AGN, and that the $3\\times10^{22}$ cm$^{-2}$ coverer is likely to have a more distant origin and have a flattened geometry in order to allow the small-scale radio jet to escape.

  15. Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations

    E-Print Network [OSTI]

    Jennifer E. Scott; Gerard A. Kriss; Julia C. Lee; Jessica Kim Quijano; Michael Brotherton; Claude R. Canizares; Richard F. Green; John Hutchings; Mary Elizabeth Kaiser; Herman Marshall; William Oegerle; Patrick Ogle; Wei Zheng

    2005-09-20T23:59:59.000Z

    We present simultaneous X-ray, far-ultraviolet, and near-ultraviolet spectra of the Seyfert 1 galaxy NGC 7469 obtained with the Chandra X-Ray Observatory, the Far Ultraviolet Spectroscopic Explorer, and the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. Previous non-simultaneous observations of this galaxy found two distinct UV absorption components, at -560 and -1900 km/s, with the former as the likely counterpart of the X-ray absorber. We confirm these two absorption components in our new UV observations, in which we detect prominent O VI, Ly alpha, N V, and C IV absorption. In our Chandra spectrum we detect O VIII emission, but no significant O VIII or O VII absorption. We also detect a prominent Fe K alpha emission line in the Chandra spectrum, as well as absorption due to hydrogen-like and helium-like neon, magnesium, and silicon at velocities consistent with the -560 km/s UV absorber. The FUSE and STIS data reveal that the H I and C IV column densities in this UV- and X-ray- absorbing component have increased over time, as the UV continuum flux decreased. We use measured H I, N V, C IV, and O VI column densities to model the photoionization state of both absorbers self-consistently. We confirm the general physical picture of the outflow in which the low velocity component is a highly ionized, high density absorber with a total column density of 10^20 cm^-2, located near the broad emission line region, although due to measurable columns of N V and C IV, we assign it a somewhat smaller ionization parameter than found previously, U~1. The high velocity UV component is of lower density, log N=18.6, and likely resides farther from the central engine as we find its ionization parameter to be U=0.08.

  16. Cosmological implications of baryon acoustic oscillation (BAO) measurements

    E-Print Network [OSTI]

    Éric Aubourg; Stephen Bailey; Julian E. Bautista; Florian Beutler; Vaishali Bhardwaj; Dmitry Bizyaev; Michael Blanton; Michael Blomqvist; Adam S. Bolton; Jo Bovy; Howard Brewington; J. Brinkmann; Joel R. Brownstein; Angela Burden; Nicolás G. Busca; William Carithers; Chia-Hsun Chuang; Johan Comparat; Antonio J. Cuesta; Kyle S. Dawson; Timothée Delubac; Daniel J. Eisenstein; Andreu Font-Ribera; Jian Ge; J. -M. Le Goff; Satya Gontcho A Gontcho; J. Richard Gott III; James E. Gunn; Hong Guo; Julien Guy; Jean-Christophe Hamilton; Shirley Ho; Klaus Honscheid; Cullan Howlett; David Kirkby; Francisco S. Kitaura; Jean-Paul Kneib; Khee-Gan Lee; Dan Long; Robert H. Lupton; Mariana Vargas Magaña; Viktor Malanushenko; Elena Malanushenko; Marc Manera; Claudia Maraston; Daniel Margala; Cameron K. McBride; Jordi Miralda-Escudé; Adam D. Myers; Robert C. Nichol; Pasquier Noterdaeme; Sebastián E. Nuza; Matthew D. Olmstead; Daniel Oravetz; Isabelle Pâris; Nikhil Padmanabhan; Nathalie Palanque-Delabrouille; Kaike Pan; Marcos Pellejero-Ibanez; Will J. Percival; Patrick Petitjean; Matthew M. Pieri; Francisco Prada; Beth Reid; Natalie A. Roe; Ashley J. Ross; Nicholas P. Ross; Graziano Rossi; Jose Alberto Rubiño-Martín; Ariel G. Sánchez; Lado Samushia; Ricardo Tanausú Génova Santos; Claudia G. Scóccola; David J. Schlegel; Donald P. Schneider; Hee-Jong Seo; Erin Sheldon; Audrey Simmons; Ramin A. Skibba; Anže Slosar; Michael A. Strauss; Daniel Thomas; Jeremy L. Tinker; Rita Tojeiro; Jose Alberto Vazquez; Matteo Viel; David A. Wake; Benjamin A. Weaver; David H. Weinberg; W. M. Wood-Vasey; Christophe Yèche; Idit Zehavi; Gong-Bo Zhao

    2014-11-18T23:59:59.000Z

    We derive constraints on cosmological parameters and tests of dark energy models from the combination of baryon acoustic oscillation (BAO) measurements with cosmic microwave background (CMB) and Type Ia supernova (SN) data. We take advantage of high-precision BAO measurements from galaxy clustering and the Ly-alpha forest (LyaF) in the BOSS survey of SDSS-III. BAO data alone yield a high confidence detection of dark energy, and in combination with the CMB angular acoustic scale they further imply a nearly flat universe. Combining BAO and SN data into an "inverse distance ladder" yields a 1.7% measurement of $H_0=67.3 \\pm1.1$ km/s/Mpc. This measurement assumes standard pre-recombination physics but is insensitive to assumptions about dark energy or space curvature, so agreement with CMB-based estimates that assume a flat LCDM cosmology is an important corroboration of this minimal cosmological model. For open LCDM, our BAO+SN+CMB combination yields $\\Omega_m=0.301 \\pm 0.008$ and curvature $\\Omega_k=-0.003 \\pm 0.003$. When we allow more general forms of evolving dark energy, the BAO+SN+CMB parameter constraints remain consistent with flat LCDM. While the overall $\\chi^2$ of model fits is satisfactory, the LyaF BAO measurements are in moderate (2-2.5 sigma) tension with model predictions. Models with early dark energy that tracks the dominant energy component at high redshifts remain consistent with our constraints, but models where dark matter decays into radiation are sharply limited. Expansion history alone yields an upper limit of 0.56 eV on the summed mass of neutrino species, improving to 0.26 eV if we include Planck CMB lensing. Standard dark energy models constrained by our data predict a level of matter clustering that is high compared to most, but not all, observational estimates. (Abridged)

  17. Metastatic function of BMP-2 in gastric cancer cells: The role of PI3K/AKT, MAPK, the NF-{kappa}B pathway, and MMP-9 expression

    SciTech Connect (OSTI)

    Kang, Myoung Hee [Graduate School of Medicine, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of)] [Graduate School of Medicine, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of); Oh, Sang Cheul [Division of Oncology/Hematology, Department of Internal Medicine, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of)] [Division of Oncology/Hematology, Department of Internal Medicine, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of); Lee, Hyun Joo [Department of Pathology, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of)] [Department of Pathology, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of); Kang, Han Na; Kim, Jung Lim [Graduate School of Medicine, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of)] [Graduate School of Medicine, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of); Kim, Jun Suk [Division of Oncology/Hematology, Department of Internal Medicine, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of)] [Division of Oncology/Hematology, Department of Internal Medicine, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of); Yoo, Young A., E-mail: ydanbi@korea.ac.kr [Brain Korea 21 Program for Biomedical Science, Korea University College of Medicine, Korea University, Seoul 136-705 (Korea, Republic of)

    2011-07-15T23:59:59.000Z

    Bone morphogenetic proteins (BMPs) have been implicated in tumorigenesis and metastatic progression in various types of cancer cells, but the role and cellular mechanism in the invasive phenotype of gastric cancer cells is not known. Herein, we determined the roles of phosphoinositide 3-kinase (PI3K)/AKT, extracellular signal-regulated protein kinase (ERK), nuclear factor (NF)-{kappa}B, and matrix metalloproteinase (MMP) expression in BMP-2-mediated metastatic function in gastric cancer. We found that stimulation of BMP-2 in gastric cancer cells enhanced the phosphorylation of AKT and ERK. Accompanying activation of AKT and ERK kinase, BMP-2 also enhanced phosphorylation/degradation of I{kappa}B{alpha} and the nuclear translocation/activation of NF-{kappa}B. Interestingly, blockade of PI3K/AKT and ERK signaling using LY294002 and PD98059, respectively, significantly inhibited BMP-2-induced motility and invasiveness in association with the activation of NF-{kappa}B. Furthermore, BMP-2-induced MMP-9 expression and enzymatic activity was also significantly blocked by treatment with PI3K/AKT, ERK, or NF-{kappa}B inhibitors. Immunohistochemistry staining of 178 gastric tumor biopsies indicated that expression of BMP-2 and MMP-9 had a significant positive correlation with lymph node metastasis and a poor prognosis. These results indicate that the BMP-2 signaling pathway enhances tumor metastasis in gastric cancer by sequential activation of the PI3K/AKT or MAPK pathway followed by the induction of NF-{kappa}B and MMP-9 activity, indicating that BMP-2 has the potential to be a therapeutic molecular target to decrease metastasis.

  18. Protective effects of anisodamine on cigarette smoke extract-induced airway smooth muscle cell proliferation and tracheal contractility

    SciTech Connect (OSTI)

    Xu, Guang-Ni; Yang, Kai; Xu, Zu-Peng; Zhu, Liang; Hou, Li-Na; Qi, Hong; Chen, Hong-Zhuan, E-mail: hongzhuan_chen@hotmail.com; Cui, Yong-Yao, E-mail: yongyaocui@yahoo.com.cn

    2012-07-01T23:59:59.000Z

    Anisodamine, an antagonist of muscarinic acetylcholine receptors (mAChRs), has been used therapeutically to improve smooth muscle function, including microvascular, intestinal and airway spasms. Our previous studies have revealed that airway hyper-reactivity could be prevented by anisodamine. However, whether anisodamine prevents smoking-induced airway smooth muscle (ASM) cell proliferation remained unclear. In this study, a primary culture of rat ASM cells was used to evaluate an ASM phenotype through the ability of the cells to proliferate and express contractile proteins in response to cigarette smoke extract (CSE) and intervention of anisodamine. Our results showed that CSE resulted in an increase in cyclin D1 expression concomitant with the G0/G1-to-S phase transition, and high expression of M2 and M3. Functional studies showed that tracheal hyper-contractility accompanied contractile marker ?-SMA high-expression. These changes, which occur only after CSE stimulation, were prevented and reversed by anisodamine, and CSE-induced cyclin D1 expression was significantly inhibited by anisodamine and the specific inhibitor U0126, BAY11-7082 and LY294002. Thus, we concluded that the protective and reversal effects and mechanism of anisodamine on CSE-induced events might involve, at least partially, the ERK, Akt and NF-?B signaling pathways associated with cyclin D1 via mAChRs. Our study validated that anisodamine intervention on ASM cells may contribute to anti-remodeling properties other than bronchodilation. -- Highlights: ? CSE induces tracheal cell proliferation, hyper-contractility and ?-SMA expression. ? Anisodamine reverses CSE-induced tracheal hyper-contractility and cell proliferation. ? ERK, PI3K, and NF-?B pathways and cyclin D1 contribute to the reversal effect.

  19. Dissociation of ERK and Akt signaling in endothelial cell angiogenic responses to {beta}-amyloid

    SciTech Connect (OSTI)

    Magrane, Jordi [Department of Neurology, Caritas St. Elizabeth's Medical Center and Tufts University School of Medicine, Boston, MA 02135 (United States); Christensen, Rial A. [Department of Neurology, Caritas St. Elizabeth's Medical Center and Tufts University School of Medicine, Boston, MA 02135 (United States); Rosen, Kenneth M. [Department of Neurology, Caritas St. Elizabeth's Medical Center and Tufts University School of Medicine, Boston, MA 02135 (United States); Veereshwarayya, Vimal [Department of Neurology, Caritas St. Elizabeth's Medical Center and Tufts University School of Medicine, Boston, MA 02135 (United States); Querfurth, Henry W. [Department of Neurology, Caritas St. Elizabeth's Medical Center and Tufts University School of Medicine, Boston, MA 02135 (United States)]. E-mail: hquerf01@granite.tufts.edu

    2006-04-15T23:59:59.000Z

    Cerebrovascular deposits of {beta}-amyloid (A{beta}) peptides are found in Alzheimer's disease and cerebral amyloid angiopathy with stroke or dementia. Dysregulations of angiogenesis, the blood-brain barrier and other critical endothelial cell (EC) functions have been implicated in aggravating chronic hypoperfusion in AD brain. We have used cultured ECs to model the effects of {beta}-amyloid on the activated phosphorylation states of multifunctional serine/threonine kinases since these are differentially involved in the survival, proliferation and migration aspects of angiogenesis. Serum-starved EC cultures containing amyloid-{beta} peptides underwent a 2- to 3-fold increase in nuclear pyknosis. Under growth conditions with sublethal doses of {beta}-amyloid, loss of cell membrane integrity and inhibition of cell proliferation were observed. By contrast, cell migration was the most sensitive to A{beta} since inhibition was significant already at 1 {mu}M (P = 0.01, migration vs. proliferation). In previous work, intracellular A{beta} accumulation was shown toxic to ECs and Akt function. Here, extracellular A{beta} peptides do not alter Akt activation, resulting instead in proportionate decreases in the phosphorylations of the MAPKs: ERK1/2 and p38 (starting at 1 {mu}M). This inhibitory action occurs proximal to MEK1/2 activation, possibly through interference with growth factor receptor coupling. Levels of phospho-JNK remained unchanged. Addition of PD98059, but not LY294002, resulted in a similar decrease in activated ERK1/2 levels and inhibition of EC migration. Transfection of ERK1/2 into A{beta}-poisoned ECs functionally rescued migration. The marked effect of extracellular A{beta} on the migration component of angiogenesis is associated with inhibition of MAPK signaling, while Akt-dependent cell survival appears more affected by cellular A{beta}.

  20. Involvement of cyclin D1/CDK4 and pRb mediated by PI3K/AKT pathway activation in Pb{sup 2+}-induced neuronal death in cultured hippocampal neurons

    SciTech Connect (OSTI)

    Li Chenchen [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: glacier@mail.ustc.edu.cn; Xing Tairan [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: kang2000@mail.ustc.edu.cn; Tang Mingliang [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: mltang@mail.ustc.edu.cn; Yong Wu [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: yongwu@mail.ustc.edu.cn; Yan Dan [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: dyan@mail.ustc.edu.cn; Deng Hongmin [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: milkcofe@mail.ustc.edu.cn; Wang Huili [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: whl1028@ustc.edu.cn; Wang Ming [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: wming@ustc.edu.cn; Chen Jutao [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: jtc@ustc.edu.cn; Ruan Diyun [Department of Neurobiology and Biophysics, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027 (China)], E-mail: ruandy@ustc.edu.cn

    2008-06-15T23:59:59.000Z

    Lead (Pb) is widely recognized as a neurotoxicant. One of the suggested mechanisms of lead neurotoxicity is apoptotic cell death. And the mechanism by which Pb{sup 2+} causes neuronal death is not well understood. The present study sought to examine the obligate nature of cyclin D1/cyclin-dependent kinase 4 (CDK4), phosphorylation of its substrate retinoblastoma protein (pRb) and its select upstream signal phosphoinositide 3-kinase (PI3K)/AKT pathway in the death of primary cultured rat hippocampal neurons evoked by Pb{sup 2+}. Our data showed that lead treatment of primary hippocampal cultures results in dose-dependent cell death. Inhibition of CDK4 prevented Pb{sup 2+}-induced neuronal death significantly but was incomplete. In addition, we demonstrated that the levels of cyclin D1 and pRb/p107 were increased during Pb{sup 2+} treatment. These elevated expression persisted up to 48 h, returning to control levels after 72 h. We also presented pharmacological and morphological evidences that cyclin D1/CDK4 and pRb/p107 were required for such kind of neuronal death. Addition of the PI3K inhibitor LY294002 (30 {mu}M) or wortmannin (100 nM) significantly rescued the cultured hippocampal neurons from death caused by Pb{sup 2+}. And that Pb{sup 2+}-elicited phospho-AKT (Ser473) participated in the induction of cyclin D1 and partial pRb/p107 expression. These results provide evidences that cell cycle elements play a required role in the death of neurons evoked by Pb{sup 2+} and suggest that certain signaling elements upstream of cyclin D1/CDK4 are modified and/or required for this form of neuronal death.