Browsing FAS Scholarly Articles by Title
Now showing items 3502-3521 of 18292
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Depletion of the Bose-Einstein condensate in Bose-Fermi mixtures
(American Physical Society, 2005)We describe the properties of a mixture of fermionic and bosonic atoms, as they are tuned across a Feshbach resonance associated with a fermionic molecular state. Provided the number of fermionic atoms exceeds the number ... -
Deploying AI Methods to Support Collaborative Writing: A Preliminary Investigation
(2015)Many documents (e.g., academic papers, government reports) are typically written by multiple authors. While existing tools facilitate and support such collaborative efforts (e.g., Dropbox, Google Docs), these tools lack ... -
Depolarization Dynamics in a Strongly Interacting Solid-State Spin Ensemble
(American Physical Society, 2017) -
Deposition of ozone to tundra
(Wiley-Blackwell, 1992)Vertical turbulent fluxes of O were measured by eddy correlation from a 12‐m high tower erected over mixed tundra terrain (dry upland tundra, wet meadow tundra, and small lakes) in western Alaska during the Arctic Boundary ... -
Depressive and Anxiety Symptoms Predict Sustained Quality of Life Deficits in HIV-Positive Ugandan Adults Despite Antiretroviral Therapy: A Prospective Cohort Study
(Wolters Kluwer Health, 2016)Abstract The impact of psychosocial status at onset of antiretroviral therapy on changes in quality of life (QOL) and subjectively rated health (SRH) among adults on highly active antiretroviral therapy (HAART) in ... -
Depth and Deblurring from a Spectrally-varying Depth-of-Field
(Springer Verlag, 2012)We propose modifying the aperture of a conventional color camera so that the effective aperture size for one color channel is smaller than that for the other two. This produces an image where different color channels have ... -
Depth of Reasoning and Higher Order Beliefs
(Elsevier BV, 2014)As demonstrated by the email game of Rubinstein (1989), the predictions of the standard equilibrium models of game theory are sensitive to assumptions about the fine details of the higher order beliefs. This paper shows ... -
A Depth-Derived Pleistocene Age-Model: Uncertainty Estimates, Sedimentation Variability, and Nonlinear Climate Change
(American Geophysical Union, 2004)A new chronology of glaciation, spanning the last 780,000 years, is estimated from 21 marine sediment cores using depth as a proxy for time. To avoid biasing this ‘‘depth-derived’’ age estimate, the depth scale is first ... -
Depth-resolved cathodoluminescence spectroscopy of silicon supersaturated with sulfur
(AIP Publishing, 2013)We investigate the luminescence of Si supersaturated with S (Si:S) using depth-resolved cathodoluminescence spectroscopy and secondary ion mass spectroscopy as the S concentration is varied over 2 orders of magnitude ... -
Derandomization Beyond Connectivity: Undirected Laplacian Systems in Nearly Logarithmic Space
(2017)We give a deterministic O˜(log n)-space algorithm for approximately solving linear systems given by Laplacians of undirected graphs, and consequently also approximating hitting times, commute times, and escape probabilities ... -
Derandomization in Cryptography
(Society for Industrial and Applied Mathematics, 2007)We give two applications of Nisan-Wigderson-type (NW-type) ("noncryptographic") pseudorandom generators in cryptography. Specifically, assuming the existence of an appropriate NW-type generator, we construct the following ... -
A Derandomized Sparse Johnson-Lindenstrauss Transform
(2010)Recent work of [Dasgupta-Kumar-Sarl´os, STOC 2010] gave a sparse Johnson-Lindenstrauss transform and left as a main open question whether their construction could be efficiently derandomized. We answer their question ... -
“Derek Brewer’s Romance,”
(Boydell and Brewer, 2013) -
Derivation of Corneal Keratocyte-Like Cells from Human Induced Pluripotent Stem Cells
(Public Library of Science, 2016)Corneal diseases such as keratoconus represent a relatively common disorder in the human population. However, treatment is restricted to corneal transplantation, which only occurs in the most advanced cases. Cell based ... -
Derivation of the cubic non-linear Schrödinger equation from quantum dynamics of many-body systems
(Springer Nature, 2006)We prove rigorously that the one-particle density matrix of three dimensional interacting Bose systems with a short-scale repulsive pair interaction converges to the solution of the cubic non-linear Schrödinger equation ... -
Derivation of the Gross-Pitaevskii equation for the dynamics of Bose-Einstein condensate
(Annals of Mathematics, Princeton U, 2010)Consider a system of N bosons in three dimensions interacting via a repulsive short range pair potential N²V (N(xi − xj)), where x = (x1,..., xN) denotes the positions of the particles. Let HN denote the Hamiltonian of the ... -
Derivations without the Activity Condition
(Dept. of Linguistics and Philosophy, Massachusetts Institute of Technology, 2005)The EPP cannot be reduced to the Inverse Case Filter (contra Boskovic 2002) and remains for the moment axiomatic in phrase-marker construction. Feature-splitting, Agree, and the EPP allow for a range of derivational options ... -
Deriving a Light Use Efficiency Model from Eddy Covariance Flux Data for Predicting Daily Gross Primary Production Across Biomes
(Elsevier, 2007)The quantitative simulation of gross primary production (GPP) at various spatial and temporal scales has been a major challenge in quantifying the global carbon cycle. We developed a light use efficiency (LUE) daily GPP ... -
Deriving Epistemic Conclusions from Agent Architecture
(Association for Computing Machinery, 2009)One of our most resilient intuitions is that causality is a precondition for information flow: where there are no causal connections, we expect there to be no flow of information. In this paper, we study this idea as it ...