Now showing items 2525-2544 of 24465

    • The Central Component of Gravitational Lens Q0957+561 

      Shapiro, Irwin; Haarsma, Deborah B.; Winn, Joshua N.; Lehar, Joseph (American Institute of Physics (IOP Publishing), 2008)
      In 1981, a faint radio source (G′) was detected near the center of the lensing galaxy of the famous “twin quasar” Q0957+561. It is still unknown whether this central radio source is a third quasar image or an active nucleus ...
    • Central Control Circuit for Context-Dependent Micturition 

      Hou, Xun (2016-12-13)
      Precise control of urine release (micturition) serves an essential physiological function, as well as a critical role in social communication in many animals. Here we show a combined effect of olfaction and social hierarchy ...
    • Central Dogma at the Single-Molecule Level in Living Cells 

      Li, Gene-Wei; Xie, Xiaoliang Sunney (Nature Publishing Group, 2011)
      Gene expression originates from individual DNA molecules within living cells. Like many single-molecule processes, gene expression and regulation are stochastic, that is, sporadic in time. This leads to heterogeneity in ...
    • Central role for Sonic hedgehog-triggered pericytes in hindbrain choroid plexus development 

      Yang, Peter (2014-02-25)
      The choroid plexus is an organ within each brain ventricle comprised of elaborate folds of epithelium (CPe) and vasculature. It performs numerous functions essential for brain development and health, including secretion ...
    • The Central Role of the Propensity Score in Observational Studies for Causal Effects 

      Rosenbaum, Paul R.; Rubin, Donald B. (Oxford University Press, 1983)
      The propensity score is the conditional probability of assignment to a particular treatment given a vector of observed covariates. Both large and small sample theory show that adjustment for the scalar propensity score is ...
    • Centralized Management in Democratic Governance—Essays on Organizing a System of Executive Branch Bureaucracies 

      Stoller, Elliot (2023-06-01)
      This dissertation contributes to our understanding of how non-elected government actors can manage and lead a system of executive branch government bureaucracies to better advance both administrative capacity and democratic ...
    • A century-long commitment to assessing artificial intelligence and its impact on society 

      Grosz, Barbara; Stone, Peter (Association for Computing Machinery (ACM), 2018-11-20)
      In September 2016, Stanford's “One Hundred Year Study on Artificial Intelligence” project (AI100) issued the first report of its planned long-term periodic assessment of artificial intelligence (AI) and its impact on ...
    • Cepheid Calibrations from the Hubble Space Telescopeof the Luminosity of Two Recent Type Ia Supernovae and a Redetermination of the Hubble Constant 

      Riess, Adam G.; Li, Weidong; Stetson, Peter B.; Filippenko, Alexei V.; Jha, Saurabh; Kirshner, Robert P.; Challis, Peter M.; Garnavich, Peter M.; Chornock, Ryan (American Astronomical Society, 2005)
      We report observations of two nearby Type Ia supernovae (SNe Ia) for which observations of Cepheid variables in the host galaxies have been obtained with the Hubble Space Telescope: SN 1994ae in NGC 3370 and SN 1998aq in ...
    • Cerebral Data Structures: Integrating Context into Data Structure Design and Implementation 

      Hentschel, Brian (2022-05-11)
      The speed at which computer programs execute operations is fundamental to the way we build applications, with faster performance lowering operational costs and creating better user experiences. In addition, faster performance ...
    • Certain Aspects of Cliticization in Polish 

      Szczegielniak, Adam (Penn Graduate Linguistics Society, 1995)
      The main goal of this paper is to present an account of certain forms of cliticization in Polish. I will try to show that the fact that certain clitics undergo phonological processes typically assumed to be lexical does ...
    • Certainty and War 

      Schub, Robert Jay (2016-05-11)
      Does greater certainty about an adversary’s attributes cause peace? What states believe they can secure through force dictates the diplomatic settlements they will accept. In prevailing accounts which preclude assessment ...
    • Certified Web Services in Ynot 

      Wisnesky, Ryan; Malecha, Gregory Michael; Morrisett, John Gregory (2010-04-21)
      In this paper we demonstrate that it is possible to implement certi ed web systems in a way not much di erent from writing Standard ML or Haskell code, including use of imperative features like pointers, les, and socket ...
    • Ceteris Paribus Laws: Generics & Natural Kinds 

      Nickel, Bernhard (University of Michigan, 2010)
      Ceteris Paribus (cp-)laws may be said to hold only “other things equal,” signaling that their truth is compatible with a range of exceptions. This paper provides a new semantic account for some of the sentences used to ...
    • César Vallejo: Dos Poemas Elegíacos 

      Fernandez-cifuentes, Luis (El Colegio de Mexico, A.C., 1976-07-01)
      Los trabajos críticos sobre César Vallejo coinciden, en general, al es- tudiar el tema de la muerte en su poesía como uno de los temas capita- les y quizá el más constante entre los que se mantienen desde los He- raldos ...
    • CfA3: 185 TYPE Ia SUPERNOVA LIGHT CURVES FROM THE CfA 

      Hicken, Malcolm; Challis, Peter; Jha, Saurabh; Kirshner, Robert P.; Matheson, Tom; Modjaz, Maryam; Rest, Armin; Michael Wood-Vasey, W.; Bakos, Gaspar; Barton, Elizabeth J.; Berlind, Perry; Bragg, Ann; Briceño, Cesar; Brown, Warren R.; Caldwell, Nelson; Calkins, Mike; Cho, Richard; Ciupik, Larry; Contreras, Maria; Dendy, Kristi-Concannon; Dosaj, Anil; Durham, Nick; Eriksen, Kris; Esquerdo, Gil; Everett, Mark; Falco, Emilio; Fernandez, Jose; Gaba, Alejandro; Garnavich, Peter; Graves, Genevieve; Green, Paul; Groner, Ted; Hergenrother, Carl; Holman, Matthew J.; Hradecky, Vit; Huchra, John; Hutchison, Bob; Jerius, Diab; Jordan, Andres; Kilgard, Roy; Krauss, Miriam; Luhman, Kevin; Macri, Lucas; Marrone, Daniel; McDowell, Jonathan; McIntosh, Daniel; McNamara, Brian; Megeath, Tom; Mochejska, Barbara; Munoz, Diego; Muzerolle, James; Naranjo, Orlando; Narayan, Gautham; Pahre, Michael; Peters, Wayne; Peterson, Dawn; Rines, Ken; Ripman, Ben; Roussanova, Anna; Schild, Rudolph; Sicilia-Aguilar, Aurora; Sokoloski, Jennifer; Smalley, Kyle; Smith, Andy; Spahr, Tim; Stanek, K. Z.; Barmby, Pauline; Blondin, Stéphane; Stubbs, Christopher W.; Szentgyorgyi, Andrew; Torres, Manuel A. P.; Vaz, Amili; Vikhlinin, Alexey; Wang, Zhong; Westover, Mike; Woods, Deborah; Zhao, Ping (American Astronomical Society, 2009)
      We present multiband photometry of 185 type-Ia supernovae (SNe Ia), with over 11,500 observations. These were acquired between 2001 and 2008 at the F. L. Whipple Observatory of the Harvard-Smithsonian Center for Astrophysics ...
    • The CFR Task Force Report on “U.S. Education Reform and National Security”: A Reply and a Response 

      Engell, James (Association of Literary Scholars, Critics, and Writers, 2012)
    • CFT Duals for Extreme Black Holes 

      Hartman, Thomas; Murata, Keiju; Nishioka, Tatsuma; Strominger, Andrew E. (Institute of Physics Publishing, 2009)
      It is argued that the general four-dimensional extremal Kerr-Newman-AdS-dS black hole is holographically dual to a (chiral half of a) two-dimensional CFT, generalizing an argument given recently for the special case of ...
    • CFT's from Calabi–Yau four-folds 

      Gukov, Sergei; Vafa, Cumrun; Witten, Edward (Elsevier, 2000)
      We consider F/M/Type IIA theory compactified to four, three, or two dimensions on a Calabi-Yau four-fold, and study the behavior near an isolated singularity in the presence of appropriate fluxes and branes. We analyze the ...
    • cGAS-like receptors in animal innate immunity 

      Slavik, Kailey Madison (2023-05-04)
      The molecular detection of pathogen infection and subsequent initiation of an immune response is an essential function of cellular life. Animals encode innate immune proteins known as PRRs (pattern-recognition receptors) ...