Now showing items 23415-23434 of 32154

    • R evolution: Improving perturbative QCD 

      Hoang, Andre H.; Jain, Ambar; Scimemi, Ignazio; Stewart, Iain (American Physical Society, 2010-07)
      Perturbative QCD results in the MS̅ scheme can be dramatically improved by switching to a scheme that accounts for the dominant power law dependence on the factorization scale in the operator product expansion. We introduce ...
    • R-process enrichment from a single event in an ancient dwarf galaxy 

      Simon, Joshua D.; Ji, Alexander Pung; Frebel, Anna L.; Chiti, Anirudh (Nature Publishing Group, 2016-03)
      Elements heavier than zinc are synthesized through the rapid (r) and slow (s) neutron-capture processes. The main site of production of the r-process elements (such as europium) has been debated for nearly 60 years. Initial ...
    • The r-process Pattern of a Bright, Highly r -process-enhanced Metal-poor Halo Star at [Fe/H ] ~ -2 

      Sakari, Charli M.; Placco, Vinicius M.; Hansen, Terese; Holmbeck, Erika M.; Beers, Timothy C.; e.a. (American Astronomical Society, 2018-02)
      All rights reserved.. A high-resolution spectroscopic analysis is presented for a new highly r-process-enhanced ([Eu/Fe] = 1.27, [Ba/Eu] = -0.65), very metal-poor ([Fe/H] = -2.09), retrograde halo star, RAVE J153830.9-180424, ...
    • RAB7A phosphorylation by TBK1 promotes mitophagy via the PINK-PARKIN pathway 

      Heo, J.-M.; Ordureau, A.; Swarup, S.; Paulo, J. A.; Shen, K.; e.a. (American Association for the Advancement of Science (AAAS), 2018-11)
      Removal of damaged mitochondria is orchestrated by a pathway involving the PINK1 kinase and the PARKIN ubiquitin ligase. Ubiquitin chains assembled by PARKIN on the mitochondrial outer membrane recruit autophagy cargo ...
    • Rabbit genome analysis reveals a polygenic basis for phenotypic change during domestication 

      Lander, Eric S. (American Association for the Advancement of Science (AAAS), 2014-08)
      The genetic changes underlying the initial steps of animal domestication are still poorly understood. We generated a high-quality reference genome for the rabbit and compared it to resequencing data from populations of ...
    • Rac GTPases play multiple roles in erythropoiesis 

      Ji, Peng; Lodish, Harvey F. (Ferrata Storti Foundation, 2010-01)
      The four members of the Rac family of GTPases –Rac1, Rac2, Rac3 and RhoG – are members of the Rho superfamily that regulates the organization, dynamics, and function of the actin cytoskeleton. Rac GTPases play significant ...
    • Race, intersectionality, and method: a reply to critics 

      Haslanger, Sally (Springer-Verlag, 2013-12)
      It is a great honor to have such excellent commentary on my book, and I am happy to have the opportunity to discuss these issues with others who have done such important work on the topics. I will reply to the commentaries ...
    • Race, Region, and Vote Choice in the 2008 Election: Implications for the Future of the Voting Rights Act 

      Ansolabehere, Stephen; Persily, Nathaniel; Stewart III, Charles (Harvard Law Review Pub. Association, 2010-04)
      The election of an African American as President of the United States has raised questions regarding the continued relevance and even constitutionality of various provisions of the Voting Rights Act (VRA). Barack Obama’s ...
    • Racism, Ideology, and Social Movements 

      Haslanger, Sally (Res Philosophica, 2017-01)
      Racism, sexism, and other forms of injustice are more than just bad attitudes; after all, such injustice involves unfair distributions of goods and resources. But attitudes play a role. How central is that role? Tommie ...
    • Radar Observations of Convective System Variability in Relationship to African Easterly Waves during the 2006 AMMA Special Observing Period 

      Williams, Earle R.; Rickenbach, Thomas; Guy, Nick; Nieto Ferreira, Rosana (American Meteorological Society, 2009-12)
      A radar-based analysis of the structure, motion, and rainfall variability of westward-propagating squall-line mesoscale convective systems (SLMCSs) in Niamey, Niger, during the African Monsoon Multidisciplinary Activities ...
    • Radar Open System Architecture provides net centricity 

      Nelson, John A. (Institute of Electrical and Electronics Engineers, 2010-10)
      The second generation of the Radar Open Systems Architecture has been developed and put into practice. This approach consists of a layered architecture that isolates applications from underlying hardware and software ...
    • Radial and Spiral Stream Formation in Proteus mirabilis Colonies 

      Xue, Chuan; Othmer, Hans G.; Budrene-Kac, Elena O. (Public Library of Science, 2011-12)
      The enteric bacterium Proteus mirabilis, which is a pathogen that forms biofilms in vivo, can swarm over hard surfaces and form a variety of spatial patterns in colonies. Colony formation involves two distinct cell types: ...
    • Radial anisotropy in the crust of SE Tibet and SW China from ambient noise interferometry 

      Huang, Hui; Yao, Huajian; van der Hilst, Robert D. (American Geophysical Union (AGU), 2010-11)
      We use Rayleigh and Love wave Green's functions estimated from ambient seismic noise to study crustal structure and radial anisotropy in the tectonically complex and seismically active region west of the Sichuan Basin and ...
    • Radial Domany-Kinzel models with mutation and selection 

      Davidson, James West; Korolev, Kirill Sergeevich; Nelson, David R. (American Physical Society, 2013-01)
      We study the effect of spatial structure, genetic drift, mutation, and selective pressure on the evolutionary dynamics in a simplified model of asexual organisms colonizing a new territory. Under an appropriate coarse-graining, ...
    • RADIAL PROFILE OF THE 3.5 keV LINE OUT TO R[subscript 200] IN THE PERSEUS CLUSTER 

      Franse, Jeroen; Foster, Adam; Boyarsky, Alexey; Markevitch, Maxim; Iakubovskyi, Dmytro; e.a. (IOP Publishing, 2016-10)
      The recent discovery of the unidentified emission line at 3.5 keV in galaxies and clusters has attracted great interest from the community. As the origin of the line remains uncertain, we study the surface brightness ...
    • Radial scaling in inclusive jet production at hadron colliders 

      Taylor, Frank E (American Physical Society, 2018-03)
      Inclusive jet production in p-p and p[over ¯]-p collisions shows many of the same kinematic systematics as observed in single-particle inclusive production at much lower energies. In an earlier study (1974) a phenomenology, ...
    • The radial velocity signature of tides raised in stars hosting exoplanets 

      Arras, Phil; Burkart, Joshua; Quataert, Eliot; Weinberg, Nevin N. (Oxford University Press, 2012-05)
      Close-in, massive exoplanets raise significant tides in their stellar hosts. We compute the radial velocity (RV) signal due to this fluid motion in the equilibrium tide approximation. The predicted RVs in the observed ...
    • Radial-Basis-Function-Network-Based Prediction of Performance and Emission Characteristics in a Bio Diesel Engine Run on WCO Ester 

      Kumar, Shiva; Pai, Srinivasa; Rao, Shrinivasa (Hindawi Publishing Corporation, 2012)
      Radial basis function neural networks (RBFNNs), which is a relatively new class of neural networks, have been investigated for their applicability for prediction of performance and emission characteristics of a diesel ...
    • Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Theory 

      Nikurashin, Maxim; Ferrari, Raffaele (American Meteorological Society, 2010-05)
      Observations and inverse models suggest that small-scale turbulent mixing is enhanced in the Southern Ocean in regions above rough topography. The enhancement extends O(1) km above the topography, suggesting that mixing ...
    • Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Theory 

      Nikurashin, Maxim Anatolevich; Ferrari, Raffaele (American Meteorological Society, 2009-10)
      Observations and inverse models suggest that small-scale turbulent mixing is enhanced in the Southern Ocean in regions above rough topography. The enhancement extends O(1) km above the topography, suggesting that mixing ...