Now showing items 2276-2295 of 24465

    • The calcium sensor synaptotagmin 7 is required for synaptic facilitation 

      Jackman, Skyler L.; Turecek, Josef; Belinsky, Justine E.; Regehr, Wade G. (2015)
      It has been known for over 70 years that synaptic strength is dynamically regulated in a use-dependent manner1. At synapses with a low initial release probability, closely spaced presynaptic action potentials can result ...
    • Calculating Evolutionary Dynamics in Structured Populations 

      Nathanson, Charles Gordon; Tarnita, Corina Elena; Nowak, Martin A. (Public Library of Science, 2009)
      Evolution is shaping the world around us. At the core of every evolutionary process is a population of reproducing individuals. The outcome of an evolutionary process depends on population structure. Here we provide a ...
    • Calculating Standard Errors of Predicted Values Based on Nonlinear Functional Forms 

      King, Gary (The Society for Political Methodology, 1991)
      Whenever we report predicted values, we should also report some measure of the uncertainty of these estimates. In the linear case, this is relatively simple, and the answer well-known, but with nonlinear models the answer ...
    • Calculating the Time-Mean Oceanic General Circulation and Mixing Coefficients from Hydrographic Data 

      Tziperman, Eli (American Meteorological Society, 1988)
      The relation between the circulation calculated from averaged hydrographic data (such as the Levitus data), and the actual time average circulation is examined using a CTD dataset which provides both time and space coverage ...
    • Calculation of Exchange Energies Using Algebraic Perturbation Theory 

      Burrows, Brian L.; Dalgarno, Alexander; Cohen, Maurice (American Physical Society, 2010)
      An algebraic perturbation theory is presented for efficient calculations of localized states and hence of exchange energies, which are the differences between low-lying states of the valence electron of a molecule, formed ...
    • Calculation of the dynamics of surface melting during laser annealing 

      Surko, C. M.; Simons, A. L.; Auston, D. H.; Golovchenko, Jene Andrew; Slusher, R. E.; Venkatesan, T. N. C. (AIP Publishing, 1979)
      We present a thermal transport model to describe the melting and resolidification of semiconductors which is observed to occur during annealing with a pulsed laser. The temperature‐dependent properties of both the solid ...
    • The Calcutta Pococurante Society: Public and Private in India's Age of Reform 

      Ehrlich, Joshua (The Public Domain Review, 2016-08)
      Joshua Ehrlich on an obscure text found on the shelves of a Bengali library and the light it sheds on the idea of the “public” in 19th-century Calcutta.
    • Calibrating abundance indices with population size estimators of red back salamanders (Plethodon cinereus) in a New England Forest. 

      Siddig, Ahmed Ali; Ellison, Aaron M.; Jackson, Scott (PeerJ Inc., 2015)
      Herpetologists and conservation biologists frequently use convenient and cost-effective, but less accurate, abundance indices (e.g., number of individuals collected under artificial cover boards or during natural objects ...
    • Calibrating Rates of Early Cambrian Evolution 

      Bowring, Samuel A.; Grotzinger, John P.; Isachsen, Clark E.; Knoll, Andrew; Pelechaty, Shane M.; Kolosov, Peter (American Association for the Advancement of Science, 1993)
      An explosive episode of biological diversification occurred near the beginning of the Cambrian period. Evolutionary rates in the Cambrian have been difficult to quantify accurately because of a lack of high-precision ages. ...
    • Calibrating the Cryogenian 

      Macdonald, Francis Alexander; Schmitz, Mark D.; Crowley, James L.; Roots, Charles F.; Jones, David S.; Maloof, Adam C.; Strauss, Justin Vincent; Cohen, Phoebe; Johnston, David T; Schrag, Daniel P. (American Association for the Advancement of Science (AAAS), 2010)
      The Neoproterozoic was an era of great environmental and biological change, but a paucity of direct and precise age constraints on strata from this time has prevented the complete integration of these records. We present ...
    • Calibrating the Galaxy Halo–Black Hole Relation Based on the Clustering of Quasars 

      Wyithe, J. Stuart B.; Loeb, Abraham (American Astronomical Society, 2005)
      The observed number counts of quasars can be explained either by long-lived activity within rare massive hosts or by short-lived activity within smaller, more common hosts. It has been argued that quasar lifetimes can ...
    • Calibration Hardware and Methodology for Large Photometric Surveys 

      Mondrik, Nicholas (2020-10-07)
      Photometric surveys such as the Dark Energy Survey (DES), the Legacy Survey of Space and Time (LSST), and Pan-STARRS are and will continue to be increasingly large sources of data for the astronomical community. Type Ia ...
    • Calibration of an Astrophysical Spectrograph Below 1 m/s Using a Laser Frequency Comb 

      Phillips, David Forrest; Glenday, Alexander G.; Li, Chih-Hao; Cramer, Claire; Furesz, Gabor; Chang, Guoqing; Benedick, Andrew J.; Chen, Li-Jin; Szentgyorgyi, Andrew H.; Walsworth, Ronald L. (Optical Society of America, 2012)
      We deployed two wavelength calibrators based on laser frequency combs (“astro-combs”) at an astronomical telescope. One astro- comb operated over a 100 nm band in the deep red (∼ 800 nm) and a second operated over a 20 nm ...
    • Calibration of the MEarth Photometric System: Optical Magnitudes and Photometric Metallicity Estimates for 1802 Nearby M-dwarfs 

      Dittmann, Jason Adam; Irwin, Jonathan; Charbonneau, David; Newton, Elisabeth R (American Astronomical Society, 2016)
      The MEarth Project is a photometric survey systematically searching the smallest stars nearest to the Sun for transiting rocky planets. Since 2008, MEarth has taken approximately two million images of 1844 stars suspected ...
    • Calibration of the Total Carbon Column Observing Network Using Aircraft Profile Data 

      Wunch, D.; Toon, G. C.; Wennberg, P. O.; Wofsy, Steven Charles; Stephens, B. B.; Fischer, M. L.; Uchino, O.; Abshire, J. B.; Bernath, P.; Biraud, S. C.; Blavier, J.-F. L.; Boone, C.; Bowman, K. P.; Browell, E. V.; Campos, T.; Connor, B. J.; Daube, Bruce C.; Deutscher, N. M.; Diao, M.; Elkins, J. W.; Gerbig, C.; Gottlieb, Elaine Webster; Griffith, D. W. T.; Hurst, D. F.; Jiménez, R.; Keppel-Aleks, G.; Kort, E. A.; Macatangay, R.; Machida, T.; Matsueda, H.; Moore, F.; Morino, I.; Park, S.; Robinson, J.; Roehl, C. M.; Sawa, Y.; Sherlock, V.; Sweeney, C.; Tanaka, T.; Zondlo, M. A. (Copernicus GmbH, 2010)
      The Total Carbon Column Observing Network (TCCON) produces precise measurements of the column average dry-air mole fractions of \(CO_2\), \(CO\), \(CH_4\), \(N_2O\) and \(H_2O\) at a variety of sites worldwide. These ...
    • Calibration Procedures for a Computational Model of Ductile Fracture 

      Xue, Z; Pontin, M. G.; Zok, F. W.; Hutchinson, John W. (Elsevier, 2010)
      A recent extension of the Gurson constitutive model of damage and failure of ductile structural alloys accounts for localization and crack formation under shearing as well as tension. When properly calibrated against a ...
    • A call for collaborative interfaces 

      Shieber, Stuart (Association for Computing Machinery, 1996)
      In this note, I call for a move towards viewing interfaces as means for people and computers to collaborate on solving problems rather than means for people to control computers. This collaborative perspective on user ...
    • Callimachus Back in Rome 

      Thomas, Richard F. (Egbert Forsten, 1993)
    • Callimachus, the Victoria Berenices, and Roman Poetry 

      Thomas, Richard F. (Cambridge University Press, 1983)
    • The Cambridge-Cambridge ROSAT Serendipity Survey - III. VLA observations and the evolution of radio-quiet and radio-loud objects 

      Ciliegi, P.; Elvis, Martin S.; Wilkes, Belinda Jane; Boyle, B. J.; McMahon, R. G.; Maccacaro, T. (Oxford University Press (OUP), 1995)
      We present the results of the VLA radio observations at 1.475 GHz (20 cm) of the active galactic nuclei (AGN) in the Cambridge-Cambridge ROSAT Serendipity Survey (CRSS), a sample of 123 faint X-ray sources with ...