Browsing University of Hertfordshire by Title

Now showing items 181-200 of 24071

    • The absence of an environmental dependence in the mass-metallicity relation at z = 2 

      Kacprzak, Glenn G.; Yuan, Tiantian; Nanayakkara, Themiya; Kobayashi, Chiaki; Tran, Kim V. Y. H.; Kewley, Lisa J.; Glazebrook, Karl; Spitler, Lee; Taylor, Philip; Cowley, Michael; Labbe, Ivo; Straatman, Caroline; Tomczak, Adam (2015-04-02)
      We investigate the environmental dependence of the mass-metallicity relation at z = 2 with MOSFIRE/Keck as part of the ZFIRE survey. Here, we present the chemical abundance of a Virgo-like progenitor at z = 2.095 that has ...

    • The Absence of Diffuse Gas around the Dwarf Spheroidal Galaxy Leo I 

      Bowen, D.V.; Tolstoy, E.; Ferrera, A.; Blades, J.C.; Brinks, E. (1997)
      We have obtained spectra of three QSO/AGNs with the GHRS aboard the Hubble Space Telescope to search for absorption from low column density gas in the halo of the dwarf spheroidal (dSph) galaxy Leo I. The probe sight lines ...

    • An absolute calibration of DENIS (deep near infrared southern sky survey) 

      Fouque, P.; Chevallier, L.; Cohen, M.; Galliano, E.; Loup, C.; Alard, C.; de Batz, B.; Bertin, E.; Borsenberger, J.; Cioni, M-R.L.; Copet, E.; Dennefeld, M.; Derriere, S.; Deul, E.; Duc, P.A.; Egret, D.; Epchtein, N.; Forveille, T.; Garzon, F.; Habing, H.J.; Hron, J.; Kimeswenger, S.; Lacombe, F.; Le Bertre, T.; Mamon, G.A.; Omont, O.; Paturel, G.; Pau, S.; Persi, P.; Robin, A.C.; Rouan, D.; Schultheis, M.; Simon, G.; Tiphene, D.; Vauglin, I.; Wagner, S. (2000)
      An absolute calibration of the DENIS photometric system is presented. It includes the determination of the overall transmission profiles in the 3 bands, namely i, J and Ks, combining contributions from atmosphere, telescope ...

    • Absolute EIT Coupled to A Blood Gas Physiological Model for The Assessment of Lung Ventilation in Critical Care Patients 

      Denai, Mouloud; Mohamed-Samuri, S.; Mahfouf, M.; Mills, G.H. (2010)

    • Absolute Electrical Impedance Tomography (aEIT) Guided Ventilation Therapy in Critical Care Patients : Simulations and Future Trends 

      Denai, Mouloud; Mahfouf, M.; Mohamed-Samuri, S.; Panoutsos, G.; Mills, G.H.; Brown, B.H. (2010)
      Thoracic electrical impedance tomography (EIT) is a noninvasive, radiation-free monitoring technique whose aim is to reconstruct a cross-sectional image of the internal spatial distribution of conductivity from electrical ...

    • The absolute limits of directors’ fiduciary liability for conflicts of interest : The director’s perspective 

      Gibbs, David (2015-07-15)
      The absolute limits of fiduciary loyalty are misunderstood in the context of directors as analyses focus on the interests of the principal alone. This article will demonstrate that such an approach is inconsistent with ...

    • ABSOLUTE PROPER MOTIONS OUTSIDE the PLANE (APOP) - A STEP TOWARD the GSC2.4 

      Qi, Zhaoxiang; Yu, Yong; Bucciarelli, Beatrice; Lattanzi, Mario G.; Smart, Richard L.; Spagna, Alessandro; McLean, Brian J.; Tang, Zhenghong; Jones, H.R.A.; Morbidelli, Roberto; Nicastro, Luciano; Vecchiato, Alberto (2015-10-06)
      We present a new catalog of absolute proper motions and updated positions derived from the same Space Telescope Science Institute digitized Schmidt survey plates utilized for the construction of Guide Star Catalog II. As ...

    • Absorbers and Globular Cluster Formation in Powerful High Redshift Radio Galaxies 

      Krause, M. (2002-04-01)
      A radiative hydrodynamic simulation for a typical, powerful high redshift radio galaxy is presented. The jet is injected at one third the speed of light into a 10 000 times denser, homogeneous medium. In the beginning of ...

    • Absorption of the nerve agent VX (O-ethyl-S-[2(di-isopropylamino)ethyl] methyl phosphonothioate) through pig, human and guinea pig skin in vitro 

      Dalton, Christopher H.; Hattersley, Ian J.; Rutter, Stephen J.; Chilcott, Robert (2006-12)
      The physico-chemical properties of VX make the skin the most likely route of absorption into the human body. The development of effective medical countermeasures against such percutaneous threat agents relies on the use ...

    • Absorption systems in the spectrum of GRB 021004 

      Moller, P.; Fynbo, J.; Hjorth, J.; Thomsen, B.; Egholm, M.P.; Andersen, M.I.; Gorosabel, J.; Holland, S.T.; Jakobsson, P.; Jensen, B.L.; Pedersen, H.; Pedersen, K.; Weidinger, M. (2002)
      We report on a 3600 s spectrum of GRB 021004 obtained with the Nordic Optical Telecope on La Palma 10.71 hours after the burst. We identify absorption lines from five systems at redshifts 1.3806, 1.6039, 2.2983, 2.3230, ...

    • The absorption, distribution and elimination of anthelmintic drugs : the role of pharmacokinetics 

      Baggot, J. D.; McKellar, Quintin (1994-12)

    • Absorption-line strengths of 18 late-type spiral galaxies observed with SAURON 

      Ganda, K.; Peletier, R.F.; McDermid, R.M.; Falcon-Barroso, J.; de Zeeuw, P.T.; Bacon, R.; Cappellari, M.; Davies, R.L.; Emsellem, E.; Krajnovic, D.; Kuntschner, H.; Sarzi, M.; van de Ven, G. (2007)
      We present absorption line-strength maps for a sample of 18 Sb-Sd galaxies observed using the integral-field spectrograph SAURON operating at the William Herschel Telescope on La Palma, as part of a project devoted to the ...

    • Abstract process definitions in CSP- A case study 

      Taylor, P.N. (University of Hertfordshire, 1997)
      This paper presents a CSP specification of a case study for an environment control system for a building. The modification of CSP process definitions to incorporate reuse via inheritance is the main issue presented in this ...

    • The abundance distribution of stars with planets 

      Bond, J.; Tinney, C.G.; Butler, R.P.; Jones, H.R.A.; Marcy, G.W.; Penny, A.J.; Carter, B.D. (2006)
      We present the results of a uniform, high-precision spectroscopic metallicity study of 136 G-type stars from the Anglo-Australian Planet Search, 20 of which are known to harbour extrasolar planets (as at July 2005). ...

    • An abundance of small exoplanets around stars with a wide range of metallicities 

      Buchhave, Lars A.; Latham, David W.; Johansen, Anders; Bizzarro, Martin; Torres, Guillermo; Rowe, Jason F.; Batalha, Natalie M.; Borucki, William J.; Brugamyer, Erik; Caldwell, Caroline; Bryson, Stephen T.; Ciardi, David R.; Cochran, William D.; Endl, Michael; Esquerdo, Gilbert A.; Ford, Eric B.; Geary, John C.; Gilliland, Ronald L.; Hansen, Terese; Isaacson, Howard; Laird, John B.; Lucas, P.W.; Marcy, Geoffrey W.; Morse, Jon A.; Robertson, Paul; Shporer, Avi; Stefanik, Robert P.; Still, Martin; Quinn, Samuel N. (2012-06-21)
      The abundance of heavy elements (metallicity) in the photospheres of stars similar to the Sun provides a 'fossil' record of the chemical composition of the initial protoplanetary disk. Metal-rich stars are much more likely ...

    • Abundance uncertainties obtained with the PIZBUIN framework for Monte Carlo reaction rate variations 

      Rauscher, T.; Nishimura, N.; Cescutti, G.; Hirschi, R.; Murphy, A. St J. (American Institute of Physics (AIP), 2018-04-25)
      Uncertainties in nucleosynthesis models originating from uncertainties in astrophysical reaction rates were estimated in a Monte Carlo variation procedure. Thousands of rates were simultaneously varied within individual, ...

    • Abundances and Evolution of Lithium in the Galactic Halo and Disk 

      Ryan, Sean G.; Kajino, T.; Beers, T.C.; Suzuki, T.K.; Romano, D.; Matteucci, F.; Rosolankova, K. (2001-03)
      We have measured the Li abundance of 18 stars with [2[[Fe/H][[1 and 6000[Teff[6400 K, a parameter range that was poorly represented in previous studies. We examine the Galactic chemical evolution (GCE) of this element, ...

    • Abundances and Kinematics of Extremely Metal-Deficient, Carbon-Rich Halo Stars 

      Tsangarides, S.; Ryan, Sean G.; Beers, T.C. (Astronomical Society of the Pacific, 2003)
      To study the possible nucleosynthetic backgrounds of extremely metal-deficient, carbon-rich (EMDC) stars, we have conducted high-resolution spectroscopy of 26 candidate objects selected from HK-survey stars with [Fe/H]? ...

    • Abundances in the atmosphere of the metal-rich planet-host star HD 77338 

      Kushniruk, I.O.; Pavlenko, Ya. V.; Jenkins, J.S.; Jones, Hugh (2014)
      Abundances of Fe, Si, Ni, Ti, Na, Mg, Cu, Zn, Mn, Cr and Ca in the atmosphere of the K-dwarf HD 77338 are determined and discussed. HD 77338 hosts a hot Uranus-like planet and is currently the most metal-rich single star ...

    • Abundances in very metal-poor stars 

      Ryan, Sean G. (Institut d'Astrophysique et de Geophysique, 2000)
      Metal-poor stars provide information on the characteristics and chemical evolution of the halo population of the Galaxy, the first epoch of star formation and Galaxy formation (not just locally but with relevance to ...