Browsing Faculty of Arts and Sciences by Title
Now showing items 3636-3655 of 24540
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Conformal field theories at nonzero temperature: Operator product expansions, Monte Carlo, and holography
(American Physical Society (APS), 2014)We compute the nonzero temperature conductivity of conserved flavor currents in conformal field theories (CFTs) in 2+1 space-time dimensions. At frequencies much greater than the temperature, ℏω≫kBT, the ω dependence can ... -
Conformal field theories in a periodic potential: Results from holography and field theory
(American Physical Society (APS), 2014)We study (2+1)-dimensional conformal field theories (CFTs) with a globally conserved U(1) charge, placed in a chemical potential which is periodically modulated along the spatial direction x with zero average: μ(x)=V cos(kx). ... -
Conformal vacua and entropy in de Sitter space
(American Physical Society, 2002)The de Sitter/conformal field theory (dS/CFT) correspondence is illuminated through an analysis of massive scalar field theory in d-dimensional de Sitter space. We consider a one-parameter family of dS-invariant vacua ... -
Conformation and Electronic Population Transfer in Membrane-Supported Self-Assembled Porphyrin Dimers by 2D Fluorescence Spectroscopy
(American Chemical Society (ACS), 2012)Two-dimensional fluorescence spectroscopy (2D FS) is applied to determine the conformation and femtosecond electronic population transfer in a dimer of magnesium meso tetraphenylporphyrin. The dimers are prepared by ... -
Conformation of Self-Assembled Porphyrin Dimers in Liposome Vesicles by Phase-Modulation 2D Fluorescence Spectroscopy
(National Academy of Sciences, 2011)By applying a phase-modulation fluorescence approach to 2D electronic spectroscopy, we studied the conformation-dependent exciton coupling of a porphyrin dimer embedded in a phospholipid bilayer membrane. Our measurements ... -
Conformational Control of Energy Transfer: A Mechanism for Biocompatible Nanocrystal-Based Sensors
(Wiley-Blackwell, 2012)Fold-up fluorophore: A new paradigm for designing self-referencing fluorescent nanosensors is demonstrated by interfacing a pH-triggered molecular conformational switch with quantum dots. Analytedependent, large-amplitude ... -
Conformationally selective RNA aptamers allosterically modulate the ?2-adrenoceptor
(Springer Nature, 2016)G-protein-coupled receptor (GPCR) ligands function by stabilizing multiple, functionally distinct receptor conformations. This property underlies how “biased agonists” activate specific subsets of a given receptor’s signaling ... -
Conformationally Selective RNA Aptamers Allosterically Modulate the β2-Adrenoceptor
(2016)G-protein-coupled receptor (GPCR) ligands function by stabilizing multiple, functionally distinct receptor conformations. This property underlies how “biased agonists” activate specific subsets of a given receptor’s signaling ... -
Confronting 2D delayed-detonation models with light curves and spectra of Type Ia supernovae
(Oxford University Press, 2011)We compare models for Type Ia supernova (SN Ia) light curves and spectra with an extensive set of observations. The models come from a recent survey of 44 two-dimensional delayed-detonation models computed by Kasen et al., ... -
Confronting Cosmological Simulations with Observations of Intergalactic Metals
(American Astronomical Society, 2005)Using the statistics of pixel optical depths, we compare H i, C iv, and C iii absorption in a set of six high- quality z similar to 3-4 different state- of- the- art cosmological simulations that include galactic outflows. ... -
Confronting Maxwell's demon: biophysics of xylem embolism repair
(Elsevier BV, 2009)Embolism results in a dramatic loss of xylem hydraulic transport capacity that can lead to decreased plant productivity and even death. The ability to refill embolized conduits despite the presence of tension in the xylem ... -
Confronting Model Predictions of Carbon Fluxes with Measurements of Amazon Forests Subjected to Experimental Drought
(Wiley Blackwell, 2013)Considerable uncertainty surrounds the fate of Amazon rainforests in response to climate change. Here, carbon (C) flux predictions of five terrestrial biosphere models (Community Land Model version 3.5 (CLM3.5), Ecosystem ... -
Confronting the Need for Conceptual Change in Pre-Service Science Education
(Canadian Center of Science and Education, 2013)During a five-year period the authors taught over 100 students in a graduate course (The Nature of Science) counting toward teacher certification at the Harvard Graduate School of Education. Despite the fact that students ... -
Congestion Games with Distance-Based Strict Uncertainty
(Association for the Advancement of Artificial Intelligence, 2015)We put forward a new model of congestion games where agents have uncertainty over the routes used by other agents. We take a non-probabilistic approach, assuming that each agent knows that the number of agents using an ... -
Congressional Careers, Committee Assignments, and Seniority Randomization in the US House of Representatives
(Now Publishers, 2009)This paper estimates the effects of initial committee seniority on the career histories of Democratic members of the House of Representatives from 1949 to 2006. When more than one freshman representative is assigned to a ... -
Conjoining uncooperative societies facilitates evolution of cooperation
(Springer Science and Business Media LLC, 2018-07)Social structure affects the emergence and maintenance of cooperation. Here, we study the evolutionary dynamics of cooperation in fragmented societies, and show that conjoining segregated cooperation-inhibiting groups, if ... -
Conjugate Fabry–Perot Cavity Pair for Improved Astro-Comb Accuracy
(Optical Society of America, 2012)We propose a new astro-comb mode-filtering scheme composed of two Fabry–Perot cavities (coined “conjugate Fabry–Perot cavity pair”). Simulations indicate that this new filtering scheme makes the accuracy of astro-comb ... -
Conjuring the Masses: The Figure of the Crowd in Modern Chinese Literature and Visual Culture
(2012-10-22)This dissertation argues that the figure of the crowd in literature and visual culture constitutes a crucial component in the emergence and construction of the cultural, political, and historical values of modern China. ... -
Conjuring the Mysteries of Slavery: Voodoo, Fetishism, and Stereotype in Ishmael Reed’s Flight to Canada
(Duke University Press, 2005) -
Connected components of affine Deligne–Lusztig varieties in mixed characteristic
(Oxford University Press (OUP), 2015)We determine the set of connected components of minuscule affine Deligne–Lusztig varieties for hyperspecial maximal compact subgroups of unramified connected reductive groups. Partial results are also obtained for non-minuscule ...