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Browsing MIT Open Access Articles by Title

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  • Menze, Bjoern Holger; Kelm, Bernd Michael; Nix, Oliver; Zechmann, Christian M.; Hamprecht, Fred A. (Institute of Electrical and Electronics Engineers, 2009-09)
    Dynamic contrast-enhanced magnetic resonance (DCE-MR) imaging can be used to study microvascular structure in vivo by monitoring the abundance of an injected diffusible contrast agent over time. The resulting spatially ...
  • Almond, Douglas; Doyle, Joseph J.; Kowalski, Amanda E.; Williams, Heidi L. (MIT Press, 2010-04)
    A key policy question is whether the benefits of additional medical expenditures exceed their costs. We propose a new approach for estimating marginal returns to medical spending based on variation in medical inputs generated ...
  • Calabrese, Francesco; Di Lorenzo, Giusy; Liu, Liang; Ratti, Carlo (Institute of Electrical and Electronics Engineers (IEEE), 2011-04)
    Using an algorithm to analyze opportunistically collected mobile phone location data, the authors estimate weekday and weekend travel patterns of a large metropolitan area with high accuracy.
  • Veitch, J.; Mandel, Ilya; Aylott, B. E.; Farr, B.; Raymond, V.; Rodriguez, C.; van der Sluys, M.; Kalogera, V.; Vecchio, A. (American Physical Society, 2012-05)
    The advanced versions of the LIGO and Virgo ground-based gravitational-wave detectors are expected to operate from three sites: Hanford, Livingston, and Cascina. Recent proposals have been made to place a fourth site in ...
  • Kizilcec, René F.; Bakshy, Eytan; Eckles, Dean Griffin (National Academy of Sciences (U.S.), 2016-07)
    Peer effects, in which the behavior of an individual is affected by the behavior of their peers, are central to social science. Because peer effects are often confounded with homophily and common external causes, recent ...
  • Tcaciuc, Alexandra Patricia; Nelson, Robert Gregory; Reddy, Christopher M.; Gschwend, Philip M. (American Chemical Society (ACS), 2012-03)
    Recent studies have shown that membrane–water partition coefficients of organic chemicals can be used to predict bioaccumulation and type I narcosis toxicity more accurately than the traditional K[subscript OW]-based ...
  • Bokhari, Sheharyar; Geltner, David M. (Springer Science + Business Media B.V., 2010-07)
    Indexes of commercial property prices face much scarcer transactions data than housing indexes, yet the advent of tradable derivatives on commercial property places a premium on both high frequency and accuracy of such ...
  • Fraser, A.; Palmer, Paul I.; Feng, L.; Boesch, H.; Cogan, A.; Parker, R.; Dlugokencky, E.; Fraser, P. J.; Krummel, P. B.; Langenfelds, R. L.; O'Doherty, Simon; Steele, L. P.; van der Schoot, M.; Weiss, R. F.; Prinn, Ronald G. (Copernicus GmbH, 2013-06)
    We use an ensemble Kalman filter (EnKF), together with the GEOS-Chem chemistry transport model, to estimate regional monthly methane (CH[subscript 4]) fluxes for the period June 2009–December 2010 using proxy dry-air ...
  • Ehinger, Krista A.; Xiao, Jianxiong; Torralba, Antonio; Oliva, Aude (Cognitive Science Society, Inc., 2011-07)
    Scenes, like objects, are visual entities that can be categorized into functional and semantic groups. One of the core concepts of human categorization is the idea that category membership is graded: some exemplars are ...
  • Klocker, Andreas; Ferrari, Raffaele; LaCasce, Joseph H. (American Meteorological Society, 2012-09)
    Particle- and tracer-based estimates of lateral diffusivities are used to estimate the suppression of eddy mixing across strong currents. Particles and tracers are advected using a velocity field derived from sea surface ...
  • Crepon, Bruno; Devoto, Florencia; Duflo, Esther; Pariente, William (American Economic Association, 2015-01)
    We report results from a randomized evaluation of a microcredit program introduced in rural areas of Morocco in 2006. Thirteen percent of the households in treatment villages took a loan, and none in control villages did. ...
  • Pan, Ying; Chamecki, Marcelo; Nepf, Heidi (Springer Netherlands, 2016-02)
    The mean drag–wind relationship is usually investigated assuming that field data are representative of spatially-averaged metrics of statistically stationary flow within and above a horizontally homogeneous canopy. Even ...
  • Bertsatos, Ioannis; Makris, Nicholas (American Institute of Physics/Acoustical Society of America, 2011)
    Doppleranalysis has been extensively used in active radar and sonar sensing to estimate the speed and direction of a single target within an imaging system resolution cell following deterministic theory. For target swarms, ...
  • Bouman, Katherine L.; Xiao, Bei; Freeman, William T.; Battaglia, Peter W. (Institute of Electrical and Electronics Engineers (IEEE), 2013-12)
    Passively estimating the intrinsic material properties of deformable objects moving in a natural environment is essential for scene understanding. We present a framework to automatically analyze videos of fabrics moving ...
  • Bisias, Dimitrios; Lo, Andrew W.; Watkins, James F. (Public Library of Science, 2012-05)
    Background: The National Institutes of Health (NIH) is among the world’s largest investors in biomedical research, with a mandate to: “…lengthen life, and reduce the burdens of illness and disability.” Its funding ...
  • Calef, Matthew; Griffiths, Whitney; Schulz, Alexia (Springer US, 2015-03)
    Given a natural number N, one may ask what configuration of N points on the two-sphere minimizes the discrete generalized Coulomb energy. If one applies a gradient-based numerical optimization to this problem, one encounters ...
  • Broderick, Avery E.; Fish, Vincent L.; Loeb, Abraham; Doeleman, Sheperd Samuel (IOP Publishing, 2009-05)
    Recent millimeter-VLBI observations of Sagittarius A* (Sgr A*) have, for the first time, directly probed distances comparable to the horizon scale of a black hole. This provides unprecedented access to the environment ...
  • Zhu, Laiyin; Quiring, Steven M.; Emanuel, Kerry Andrew (American Geophysical Union, 2013-12)
    This paper uses a new rainfall algorithm to simulate the long-term tropical cyclone precipitation (TCP) climatology in Texas based on synthetic tropical cyclones generated from National Center for Atmospheric Research/National ...
  • Finkelstein, Amy; Einav, Liran; Cullen, Mark R. (MIT Press Journals, 2010-08)
    We provide a graphical illustration of how standard consumer and producer theory can be used to quantify the welfare loss associated with inefficient pricing in insurance markets with selection. We then show how this welfare ...
  • Khan, Mozaffar Nayim; Watts, Ross Leslie (Elsevier, 2009-09)
    We estimate a firm-year measure of accounting conservatism, examine its empirical properties as a metric, and illustrate applications by testing new hypotheses that shed further light on the nature and effects of conservatism. ...
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