Browsing FAS Scholarly Articles by Title
Now showing items 4383-4402 of 18292
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Early-Type Galaxies in the Sloan Digital Sky Survey. III. The Fundamental Plane
(IOP Publishing, 2003)A magnitude-limited sample of nearly 9000 early-type galaxies in the redshift range 0.01 ≤ z ≤ 0.3 was selected from the Sloan Digital Sky Survey (SDSS) using morphological and spectral criteria. The fundamental plane ... -
Early-Type Galaxies in the Sloan Digital Sky Survey. IV. Colors and Chemical Evolution
(IOP Publishing, 2003)The colors and chemical abundances of early-type galaxies at redshifts z < 0.3 are studied using a sample of nearly 9000 galaxies, selected from the Sloan Digital Sky Survey using morphological and spectral criteria. In ... -
Earth rotation changes since ?500 CE driven by ice mass variations
(Elsevier BV, 2016)We predict the perturbation to the Earth's length-of-day (LOD) over the Common Era using a recently derived estimate of global sea-level change for this time period. We use this estimate to derive a time series of “clock ... -
Earth's gravitational field: seismic tomography resolves the enigma of the Laurentian anomaly
(American Geophysical Union, 1992) -
An Earth-sized planet with an Earth-like density
(Springer Nature, 2013)Recent analyses1–4 of data from the NASA Kepler spacecraft5 have established that planets with radii within 25 per cent of Earth’s (R⊕) are commonplace throughout the Galaxy, orbiting at least 16.5 per cent of Sun-like ... -
Earthquake Cycle Deformation in the Tibetan Plateau with a Weak Mid-Crustal Layer
(Wiley-Blackwell, 2013)Geodetic observations of interseismic deformation across the Tibetan plateau contain information about both tectonic and earthquake cycle processes. Time-variations in surface velocities between large earthquakes are ... -
Earthquake Ruptures with Thermal Weakening and the Operation of Major Faults at Low Overall Stress Levels
(American Geophysical Union, 2009)We model ruptures on faults that weaken in response to flash heating of microscopic asperity contacts (within a rate-and-state framework) and thermal pressurization of pore fluid. These are arguably the primary weakening ... -
Earthquake Slip Between Dissimilar Poroelastic Materials
(American Geophysical Union, 2008)A mismatch of elastic properties across a fault induces normal stress changes during spatially nonuniform in-plane slip. Recently, Rudnicki and Rice showed that similar effects follow from a mismatch of poroelastic properties ... -
Earth’s Multi-Scale Topographic Response to Global Mantle Flow
(Springer Science and Business Media LLC, 2019-09-16)Earth’s surface topography is a direct physical expression of our planet’s dynamics. Most is isostatic, controlled by thickness and density variations within the crust and lithosphere, but a substantial proportion arises ... -
Earth’s Polar Night Boundary Layer as an Analog for Dark Side Inversions on Synchronously Rotating Terrestrial Exoplanets
(American Astronomical Society, 2020-04-03)A key factor in determining the potential habitability of synchronously rotating planets is the strength of the atmospheric boundary layer inversion between the dark side surface and the free atmosphere. Here we analyze ... -
An Easier Way to Calibrate
(Elsevier, 1999)Forecasts are said to be calibrated if the frequency predictions are approximately correct. This is a refinement of an idea first introduced by David Blackwell in 1955. We show that “<i>K</i>-initialized myopic strategies” ... -
Easily searched encodings for number partitioning
(Springer, 1996)Can stochastic search algorithms outperform existing deterministic heuristics for the NP-hard problem Number Partitioning if given a sufficient, but practically realizable amount of time? In a thorough empirical investigation ... -
Eastern Asian emissions of anthropogenic halocarbons deduced from aircraft concentration data
(Wiley-Blackwell, 2003)The Montreal Protocol restricts production of ozone-depleting halocarbons worldwide. Enforcement of the protocol has relied mainly on annual government statistics of production and consumption of these compounds (bottom-up ... -
Easy Freshness with Pequod Cache Joins
(USENIX, 2014)Pequod is a distributed application-level key-value cache that supports declaratively defined, incrementally maintained, dynamic, partially-materialized views. These views, which we call cache joins, can simplify application ... -
Ebola Virus Epidemiology and Evolution in Nigeria
(Oxford University Press, 2016)Containment limited the 2014 Nigerian Ebola virus (EBOV) disease outbreak to 20 reported cases and 8 fatalities. We present here clinical data and contact information for at least 19 case patients, and full-length EBOV ... -
Ebola, jobs and economic activity in Liberia
(BMJ Publishing Group, 2016)Background: The 2014 Ebola virus disease (EVD) outbreak in the neighbouring West African countries of Guinea, Liberia and Sierra Leone represents the most significant setback to the region's development in over a decade. ... -
Eccentricity Growth and Orbit Flip in Near-coplanar Hierarchical Three-body Systems
(American Astronomical Society, 2014)The secular dynamical evolution of a hierarchical three-body system in which a distant third object orbits around a binary has been studied extensively, demonstrating that the inner orbit can undergo large eccentricity and ... -
Echo Reduplication: When Too-Local Movement Requires PF-Distinctness
(Linguistics Dept., University of Maryland, 2004)This paper provides supporting evidence for a number of hypotheses made in recent models of derivational syntax. The phenomenon under study is shm-reduplication in English, a particular instance of the more general, ... -
Echoes of the Brain: Local-Scale Representation of Whole-Brain Functional Networks within Transmodal Cortex
(SAGE Publications, 2015)Transmodal (nonsensory-specific) regions sit at the confluence of different information streams, and play an important role in cognition. These regions are thought to receive and integrate information from multiple functional ... -
Echoes of the Brain: Local-Scale Representation of Whole-Brain Functional Networks within Transmodal Cortex
(SAGE Publications, 2015)Transmodal (nonsensory-specific) regions sit at the confluence of different information streams, and play an important role in cognition. These regions are thought to receive and integrate information from multiple functional ...