Now showing items 3000-3019 of 18256

    • The Cool Accretion Disk in ESO 243-49 HLX-1: Further Evidence of an Intermediate-Mass Black Hole 

      Davis, Shane W.; Narayan, Ramesh; Zhu, Yucong; Barret, Didier; Farrell, Sean A.; Godet, Olivier; Servillat, Mathieu; Webb, Natalie A. (IOP Publishing, 2011)
      With an inferred bolometric luminosity exceeding \(10^{42}\;erg\;s^{–1}\), HLX-1 in ESO 243-49 is the most luminous of ultraluminous X-ray sources and provides one of the strongest cases for the existence of intermediate-mass ...
    • Cooling and Collisions of Large Gas Phase Molecules 

      Patterson, David; Tsikata, Edem; Doyle, John M. (Royal Society of Chemistry, 2010)
      Cold and dense samples of naphthalene \((C_{10}H_8)\) are produced using buffer gas cooling in combination with rapid, high flow molecule injection. The observed naphthalene density is \(n \approx 10^{11} cm_{−3}\) over a ...
    • Cooling of US Midwest summer temperature extremes from cropland intensification 

      Mueller, Nathaniel Dean; Butler, Ethan E; McKinnon, Karen Aline; Rhines, Andrew Nelson; Tingley, Martin; Holbrook, Noel Michele; Huybers, Peter John (Nature Publishing Group, 2015)
      High temperature extremes during the growing season can reduce agricultural production. At the same time, agricultural practices can modify temperatures by altering the surface energy budget. Here we identify centennial ...
    • Cooling radiation and the Ly alpha luminosity of forming galaxies 

      Fardal, M. A.; Katz, N.; Gardner, J. P.; Hernquist, L.; Weinberg, D. H.; Dave, R. (American Astronomical Society, 2001)
      We examine the cooling radiation from forming galaxies in hydrodynamic simulations of the LCDM model (cold dark matter with a cosmological constant), focusing on the Ly alpha line luminosities of high-redshift systems. ...
    • Cooling the heat of temptation: Mental self-control and the automatic evaluation of tempting stimuli 

      Hofmann, Wilhelm; Deutsch, Roland; Lancaster, Katie; Banaji, Mahzarin R. (Wiley-Blackwell, 2010)
      The present research investigated whether mental self-control strategies can reduce the automatic positivity elicited by tempting stimuli. In two studies employing chocolate as the temptation of interest, we found that ...
    • Cooling through Optimal Control of Quantum Evolution 

      Rahmani, Armin; Kitagawa, Takuya; Demler, Eugene A.; Chamon, Claudio (American Physical Society (APS), 2013)
      Nonadiabatic unitary evolution with tailored time-dependent Hamiltonians can prepare systems of cold-atomic gases with various desired properties such as low excess energies. For a system of two one-dimensional quasicondensates ...
    • Cooper pairing in non-Fermi liquids 

      Metlitski, Max A.; Mross, David F.; Sachdev, Subir; Senthil, T. (American Physical Society (APS), 2015)
      States of matter with a sharp Fermi surface but no well-defined Landau quasiparticles arise in a number of physical systems. Examples include (i) quantum critical points associated with the onset of order in metals; (ii) ...
    • Cooperate without looking: Why we care what people think and not just what they do 

      Hoffman, Moshe H.; Yoeli, Erez; Nowak, Martin A. (Proceedings of the National Academy of Sciences, 2015)
      Evolutionary game theory typically focuses on actions but ignores motives. Here, we introduce a model that takes into account the motive behind the action. A crucial question is why do we trust people more who cooperate ...
    • Cooperation and conflict in human pregnancy 

      Haig, David (Elsevier BV, 2019-06)
    • Cooperation and control in multiplayer social dilemmas 

      Hilbe, Christian; Wu, Bin; Traulsen, Arne; Nowak, Martin A. (National Academy of Sciences, 2014)
      Direct reciprocity and conditional cooperation are important mechanisms to prevent free riding in social dilemmas. However, in large groups, these mechanisms may become ineffective because they require single individuals ...
    • Cooperation and the Fate of Microbial Societies 

      Allen, Benjamin Isaac; Nowak, Martin A. (Public Library of Science, 2013)
      Microorganisms have been cooperating with each other for billions of years: by sharing resources, communicating with each other, and joining together to form biofilms and other large structures. These cooperative behaviors ...
    • Cooperation between Polycomb and androgen receptor during oncogenic transformation 

      Zhao, J. C.; Yu, J.; Runkle, C.; Wu, L.; Hu, Ming; Wu, D.; Liu, Jun; Wang, Q.; Qin, Z. S.; Yu, J. (Cold Spring Harbor Laboratory Press, 2011)
      Androgen receptor (AR) is a hormone-activated transcription factor that plays important roles in prostate development and function, as well as malignant transformation. The downstream pathways of AR, however, are incompletely ...
    • Cooperation by Design: Leadership, Structure, and Collective Dilemmas 

      Bianco, William; Bates, Robert (Cambridge University Press, 1990)
      We return to the analysis of cooperation among interdependent rational individuals. We emphasize the limited impact of iteration (or repeated play) and explore the possibility of an alternative: intervention by rational ...
    • Cooperation, decision time, and culture: Online experiments with American and Indian participants 

      Nishi, Akihiro; Christakis, Nicholas; Rand, David G. (Public Library of Science (PLoS), 2017)
      Two separate bodies of work have examined whether culture affects cooperation in economic games and whether cooperative or non-cooperative decisions occur more quickly. Here, we connect this work by exploring the relationship ...
    • Cooperative behavior cascades in human social networks 

      Fowler, J. H.; Christakis, N (Proceedings of the National Academy of Sciences, 2010)
      Theoretical models suggest that social networks influence the evolution of cooperation, but to date there have been few experimental studies. Observational data suggest that a wide variety of behaviors may spread in human ...
    • Cooperative Emission of Light Quanta: A Theory of Coherent Radiation Damping 

      Glauber, Roy J. (2009)
      A quantum emitted by any of a collection of identical atoms may be absorbed and re-emitted by other atoms many times before it eventually emerges. The radiation process is thus best described as collective or cooperative ...
    • Cooperative Multiagent Search for Portfolio Selection 

      Parkes, David C.; Huberman, Bernardo A. (1998)
      We present a new multiagent model for the multiperiod portfolio selection problem. Individual agents receive a share of initial wealth, and follow an investment strategy that adjusts their portfolio as they observe movements ...
    • Cooperative regulation by G proteins and Na+ of neuronal GIRK2 K+ channels 

      Wang, Weiwei; Touhara, Kouki K; Weir, Keiko; Bean, Bruce P; MacKinnon, Roderick (eLife Sciences Publications, Ltd, 2016)
      G protein gated inward rectifier K+ (GIRK) channels open and thereby silence cellular electrical activity when inhibitory G protein coupled receptors (GPCRs) are stimulated. Here we describe an assay to measure neuronal ...
    • Cooperative Resonances in Light Scattering from Two-Dimensional Atomic Arrays 

      Shahmoon, Ephraim; Wild, Dominik S.; Lukin, Mikhail D.; Yelin, Susanne F. (American Physical Society, 2017)
      We consider light scattering off a two-dimensional (2D) dipolar array and show how it can be tailored by properly choosing the lattice constant of the order of the incident wavelength. In particular, we demonstrate that ...
    • Cooperativity and stability in a Langevin model of proteinlike folding 

      Berriz, Gabriel F.; Gutin, Alexander M.; Shakhnovich, Eugene I. (AIP Publishing, 1997)
      We present two simplified models of protein dynamics based on Langevin's equation of motion in a viscous medium. We explore the effect of the potential energy function's symmetry on the kinetics and thermodynamics of ...