Browsing FAS Scholarly Articles by Title
Now showing items 4236-4255 of 18276
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Dualism and Macroeconomic Volatility
(MIT Press, 1999)This paper develops a simple macroeconomic model that shows that combining capital market imperfections together with unequal access to investment opportunities across individuals can generate endogenous and permanent ... -
Dualistic Forms
(Oxford University Press, 2011)This article explores some of the consequences of Riemann's harmonic dualism that were not pursued by Riemann himself. The question of musical forms is one that Riemann intriguingly leaves unresolved—despite the fact that ... -
Dueling biological and social contagions
(Springer Nature, 2017)Numerous models explore how a wide variety of biological and social phenomena spread in social networks. However, these models implicitly assume that the spread of one phenomenon is not affected by the spread of another. ... -
Dumbbell Defects in FeSe Films: A Scanning Tunneling Microscopy and First-Principles Investigation
(American Chemical Society (ACS), 2016)The properties of iron-based superconductors (Fe-SCs) can be varied dramatically with the introduction of dopants and atomic defects. As a pressing example, FeSe, parent phase of the highest-Tc Fe-SC, exhibits prevalent ... -
Durable Effects of Concentrated Disadvantage on Verbal Ability among African-American Children
(Proceedings of the National Academy of Sciences, 2008)Disparities in verbal ability, a major predictor of later life outcomes, have generated widespread debate, but few studies have been able to isolate neighborhood-level causes in a developmentally and ecologically appropriate ... -
Dust and Hco+gas in the Star-forming Core W3-se
(American Astronomical Society, 2010)We report new results from recent Combined Array for Research in Millimeter-wave Astronomy (CARMA) observations of both continuum and HCO+(1-0) line emission at lambda 3.4 mm from W3-SE, a molecular core of intermediate ... -
Dust Emission from the Perseus Molecular Cloud
(American Astronomical Society, 2008)Using far-infrared emission maps taken by IRAS and Spitzer and a near-infrared extinction map derived from 2MASS data, we have made dust temperature and column density maps of the Perseus molecular cloud. We show that the ... -
The Dust Emissivity Spectral Index in the Starless Core TMC-1C
(American Astronomical Society, 2009)In this paper, we present a dust emission map of the starless core TMC-1C taken at \(2100 \mu m\). Along with maps at 160, 450, 850, and 1200 μm, we study the dust emissivity spectral index from the (sub)millimeter spectral ... -
Dust Spectral Energy Distributions in the Era of Herschel and Planck: A Hierarchical Bayesian-Fitting Technique
(American Astronomical Society, 2012)We present a hierarchical Bayesian method for fitting infrared spectral energy distributions (SEDs) of dust emission to observed fluxes. Under the standard assumption of optically thin single temperature (T) sources, the ... -
Dwelling on the Negative: Incentivizing Effort in Peer Prediction
(Association for the Advancement of Artificial Intelligence, 2014)Agents are asked to rank two objects in a setting where effort is costly and agents differ in quality (which is the probability that they can identify the correct, ground truth, ranking). We study simple output-agreement ... -
Dynamic Chromatin Organization during Foregut Development Mediated by the Organ Selector Gene PHA-4/FoxA
(Public Library of Science (PLoS), 2010)Central regulators of cell fate, or selector genes, establish the identity of cells by direct regulation of large cohorts of genes. In Caenorhabditis elegans, foregut (or pharynx) identity relies on the FoxA transcription ... -
Dynamic compression of dense oxide (Gd3Ga5O12) from 0.4 to 2.6 TPa: Universal Hugoniot of fluid metals
(Nature Publishing Group, 2016)Materials at high pressures and temperatures are of great current interest for warm dense matter physics, planetary sciences, and inertial fusion energy research. Shock-compression equation-of-state data and optical ... -
Dynamic control of light emission faster than the lifetime limit using VO2 phase-change
(Nature Pub. Group, 2015)Modulation is a cornerstone of optical communication, and as such, governs the overall speed of data transmission. Currently, the two main strategies for modulating light are direct modulation of the excited emitter ... -
Dynamic control of liquid-core/liquid-cladding optical waveguides
(National Academy of Sciences, 2004)This report describes the manipulation of light in waveguides that comprise a liquid core and a liquid cladding (liq/liq waveguide). These waveguides are dynamic: Their structure and function depend on a continuous, laminar ... -
Dynamic daylight control system implementing thin cast arrays of polydimethylsiloxane-based millimeter-scale transparent louvers
(Elsevier BV, 2014)The deep building layouts typical in the U.S. have led to a nearly complete reliance on artificial lighting in standard office buildings. The development of daylight control systems that maximize the penetration and optimize ... -
Dynamic Equilibrium Mechanism for Surface Nanobubble Stabilization
(American Physical Society, 2008)Recent experiments have convincingly demonstrated the existence of surface nanobubbles on submerged hydrophobic surfaces. However, classical theory dictates that small gaseous bubbles quickly dissolve because their large ... -
Dynamic Factor Models
(Oxford University Press, 2011)This article surveys work on a class of models, dynamic factor models (DFMs), that has received considerable attention in the past decade because of their ability to model simultaneously and consistently data sets in which ... -
Dynamic ham-sandwich cuts in the plane
(Elsevier BV, 2009)We design efficient data structures for dynamically maintaining a ham-sandwich cut of two point sets in the plane subject to insertions and deletions of points in either set. A ham-sandwich cut is a line that simultaneously ... -
Dynamic Incentive Mechanisms
(Association for the Advancement of Artificial Intelligence, 2010-10-13)Much of AI is concerned with the design of intelligent agents. A complementary challenge is to understand how to design “rules of encounter” (Rosenschein and Zlotkin 1994) by which to promote simple, robust and beneficial ... -
Dynamic Logit with Choice Aversion
(The Econometric Society, 2015)We characterize a generalization of discounted logistic choice that incorporates a parameter to capture different views the agent might have about the costs and benefits of larger choice sets. The discounted logit model ...