Now showing items 4068-4087 of 24465

    • Cosmological parameters from SDSS and WMAP 

      Tegmark, Max; Strauss, Michael A.; Blanton, Michael R.; Abazajian, Kevork; Dodelson, Scott; Sandvik, Havard; Wang, Xiaomin; Weinberg, David H.; Zehavi, Idit; Bahcall, Neta A.; Hoyle, Fiona; Schlegel, David; Scoccimarro, Roman; Vogeley, Michael S.; Berlind, Andreas; Budavari, Tamás; Connolly, Andrew; Eisenstein, Daniel James; Finkbeiner, Douglas; Frieman, Joshua A.; Gunn, James E.; Hui, Lam; Jain, Bhuvnesh; Johnston, David; Kent, Stephen; Lin, Huan; Nakajima, Reiko; Nichol, Robert C.; Ostriker, Jeremiah P.; Pope, Adrian; Scranton, Ryan; Seljak, Uroš; Sheth, Ravi K.; Stebbins, Albert; Szalay, Alexander S.; Szapudi, István; Xu, Yongzhong; Annis, James; Brinkmann, J.; Burles, Scott; Castander, Francisco J.; Csabai, Istvan; Loveday, Jon; Doi, Mamoru; Fukugita, Masataka; Gillespie, Bruce; Hennessy, Greg; Hogg, David W.; Ivezic, Zeljko; Knapp, Gillian R.; Lamb, Don Q.; Lee, Brian C.; Lupton, Robert H.; McKay, Timothy A.; Kunszt, Peter; Munn, Jeffrey A.; O’Connell, Liam; Peoples, John; Pier, Jeffrey R.; Richmond, Michael; Rockosi, Constance; Schneider, Donald P.; Stoughton, Christopher; Tucker, Douglas L.; Vanden Berk, Daniel E.; Yanny, Brian; York, Donald G. (American Physical Society (APS), 2004)
      We measure cosmological parameters using the three-dimensional power spectrum P(k) from over 200,000 galaxies in the Sloan Digital Sky Survey (SDSS) in combination with WMAP and other data. Our results are consistent with ...
    • Cosmological Parameters From the Quad Cmb Polarization Experiment 

      Castro, P. G.; Ade, P.; Bock, J.; Bowden, M.; Brown, M. L.; Cahill, G.; Church, S.; Culverhouse, T.; Friedman, R. B.; Ganga, K.; Gear, W. K.; Gupta, S.; Hinderks, J.; Kovac, John M; Lange, A. E.; Leitch, E.; Melhuish, S. J.; Memari, Y.; Murphy, J. A.; Orlando, A.; Pryke, Clement L.; Schwarz, R.; O, C.; Piccirillo, L.; Rajguru, N.; Rusholme, B.; Taylor, A. N.; Thompson, K. L.; Turner, A. H.; Wu, E. Y. S.; Zemcov, M. (IOP Publishing, 2009)
      In this paper, we present a parameter estimation analysis of the polarization and temperature power spectra from the second and third season of observations with the QUaD experiment. QUaD has for the first time detected ...
    • Cosmological Recombination of Lithium and Its Effect on the Microwave Background Anisotropies 

      Stancil, Phillip C.; Loeb, Abraham; Zaldarriaga, Matias; Dalgarno, Alexander; Lepp, Stephen (IOP Publishing, 2002)
      The cosmological recombination history of lithium, produced during big bang nucleosynthesis, is presented using updated chemistry and cosmological parameters consistent with recent cosmic microwave background (CMB) ...
    • Cosmological Results from High‐ z Supernovae 

      Tonry, John L.; Schmidt, Brian P.; Barris, Brian; Candia, Pablo; Challis, Peter; Clocchiatti, Alejandro; Coil, Alison L.; Filippenko, Alexei V.; Garnavich, Peter; Hogan, Craig; Holland, Stephen T.; Jha, Saurabh; Kirshner, Robert P.; Krisciunas, Kevin; Leibundgut, Bruno; Li, Weidong; Matheson, Thomas; Phillips, Mark M.; Riess, Adam G.; Schommer, Robert; Smith, R. Chris; Sollerman, Jesper; Spyromilio, Jason; Stubbs, Christopher W.; Suntzeff, Nicholas B. (American Astronomical Society, 2003)
    • Cosmological smoothed particle hydrodynamics simulations: a hybrid multiphase model for star formation 

      Springel, V.; Hernquist, L. (Oxford University Press, 2003)
      We present a model for star formation and supernova feedback that describes the multiphase structure of star-forming gas on scales that are typically not resolved in cosmological simulations. Our approach includes radiative ...
    • Cosmological smoothed particle hydrodynamics simulations: the entropy equation 

      Springel, V.; Hernquist, L. (Oxford University Press, 2002)
      We discuss differences in simulation results that arise between the use of either the thermal energy or the entropy as an independent variable in smoothed particle hydrodynamics (SPH). In this context, we derive a new ...
    • Cosmology With Contaminated Samples: Methods of Measuring Dark Energy With Photometrically Classified Pan-Starrs Supernovae 

      Berger, Edo; Jones, D.O.; Scolnic, D.M.; Riess, A.G.; Kessler, R.; Kirshner, Robert P.; Ortega, C.A.; Foley, R.J.; Chornock, R.; Challis, Peter M.; Burgett, W.S.; Chambers, K.C.; Draper, P.W.; Flewelling, H.; Huber, M.E.; Kaiser, N.; Kudritzki, R.-P.; Metcalfe, N.; Wainscoat, R.J.; Waters, C. (2016)
      The Pan-STARRS (PS1) Medium Deep Survey discovered over 5,000 likely supernovae (SNe) but obtained spectral classifications for just 10% of its SN candidates. We measured spectroscopic host galaxy redshifts for 3,073 of ...
    • Cosmopolitan Romance: The Adventure of Archaeology, the Politics of Genre, and the Origins of the Future in Walter Scott's Crusader Novels 

      Ocheltree, Matthew Neal (2015-08-28)
      Romanticism is the only literary-historical period defined by its privileged relation to a single genre: romance. This dissertation reorients our understanding of Romanticism’s posture toward the problem of origins, which ...
    • Cosmopolitan: A Tale of Identity from Ottoman Alexandria 

      Jasanoff, Maya (Duke University Press, 2005)
    • COSMOS: Python library for massively parallel workflows 

      Gafni, Erik; Luquette, Lovelace J.; Lancaster, Alex K.; Hawkins, Jared B.; Jung, Jae-Yoon; Souilmi, Yassine; Wall, Dennis P.; Tonellato, Peter J. (Oxford University Press, 2014)
      Summary: Efficient workflows to shepherd clinically generated genomic data through the multiple stages of a next-generation sequencing pipeline are of critical importance in translational biomedical science. Here we present ...
    • Cosserat Model for Robotic Catheter Systems 

      Waite, Thomas (2017-07-14)
      Tendon-driven robotic catheters are capable of precise execution of minimally invasive cardiac procedures including ablations and imaging. However, these procedures require accurate modeling of not only the catheter and ...
    • Cost Analysis of Stratospheric Albedo Modification Delivery Systems 

      McClellan, Justin; Keith, David; Apt, Jay (IOP Publishing, 2012)
      We perform engineering cost analyses of systems capable of delivering 1–5 million metric tonnes (Mt) of albedo modification material to altitudes of 18–30 km. The goal is to compare a range of delivery systems evaluated ...
    • The Cost of Gene Expression Underlies a Fitness Trade-Off in Yeast 

      Lang, Gregory I.; Murray, Andrew W.; Botstein, David (National Academy of Sciences, 2009)
      Natural selection optimizes an organism's genotype within the context of its environment. Adaptations to one environment can decrease fitness in another, revealing evolutionary trade-offs. Here, we show that the cost of ...
    • The Cost of Workplace Flexibility for High-Powered Professionals 

      Goldin, Claudia D.; Katz, Lawrence F. (SAGE Publications, 2011)
      The authors study the pecuniary penalties for family-related amenities in the workplace (e.g., job interruptions, short hours, part-time work, and flexibility during the workday), how women have responded to them, and how ...
    • Cost-Benefit Arbitration Between Multiple Reinforcement-Learning Systems 

      Kool, Wouter; Gershman, Samuel; Cushman, Fiery (SAGE Publications, 2017-07-21)
      Human behavior is sometimes determined by habit and other times by goal-directed planning. Modern reinforcement-learning theories formalize this distinction as a competition between a computationally cheap but inaccurate ...
    • A Cost-Space Approach to Distributed Query Optimization in Stream Based Overlays 

      Shneidman, Jeffrey; Pietzuch, Peter; Welsh, Matt; Seltzer, Margo; Roussopoulos, Mema (IEEE Computer Society, 2005)
      Distributed stream-based applications, such as continuous query systems, have network scale and time characteristics that challenge traditional distributed query optimization. The optimization sub-problems of plan generation ...
    • Costly Information Acquisition: Experimental Analysis of a Boundedly Rational Model 

      Gabaix, Xavier; Laibson, David; Moloche, Guillermo; Weinberg, Stephen (American Economic Association, 2006-09-01)
      The directed cognition model assumes that agents use partially myopic option-value calculations to select their next cognitive operation. The current paper tests this model by studying information acquisition in two ...
    • The Costs and Benefits of Fiscal Rules: Evidence from U.S. States 

      Alesina, Alberto Francesco; Bayoumi, Tamim (2018-06-22)
      This paper shows that in American states balanced budget rules are effective in enforcing fiscal discipline but they have no costs in terms of increased output variability. More specifically, we show that tighter fiscal ...
    • The Costs and Benefits of Ownership: A Theory of Vertical and Lateral Integration 

      Grossman, Sanford J.; Hart, Oliver D. (University of Chicago Press, 1986)
      Our theory of costly contracts emphasizes that contractual rights can be of two types: specific rights and residual rights. When it is costly to list all specific rights over assets in the contract, it may be optimal to ...
    • Costs and Benefits to Phasing Out Paper Currency 

      Rogoff, Kenneth S. (University of Chicago Press, 2014)
      Despite advances in transactions technologies, paper currency still constitutes a notable percentage of the money supply in most countries. For example, it constitutes roughly 10% of the US Federal Reserve’s main monetary ...