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Browsing MIT Open Access Articles by Title

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  • 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. ...
  • 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 ...
  • 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. ...
  • Balakrishnan, Hamsa; Ramanujam, Varun (Institute of Electrical and Electronics Engineers, 2009-12)
    The accurate estimation of airport capacity is critical for the efficient planning of landing and takeoff operations, and the mitigation of congestion-induced delays. The analysis of tradeoffs between arrival and departure ...
  • Marini, Robert P.; Arai, Tatsuya; Lee, Kichang; Cohen, Richard J. (American Physiological Society, 2012-03)
    The purpose of this study was to introduce and validate a new algorithm to estimate instantaneous aortic blood flow (ABF) by mathematical analysis of arterial blood pressure (ABP) waveforms. The algorithm is based on an ...
  • Schuh, Christopher A.; Murdoch, Heather Ann (Cambridge University Press (Materials Research Society), 2013-08)
    Grain boundary segregation provides a method for stabilization of nanocrystalline metals—an alloying element that will segregate to the boundaries can lower the grain boundary energy, attenuating the driving force for grain ...
  • Valenza, Gaetano; Citi, Luca; Barbieri, Riccardo (Public Library of Science, 2014-08)
    Measures of nonlinearity and complexity, and in particular the study of Lyapunov exponents, have been increasingly used to characterize dynamical properties of a wide range of biological nonlinear systems, including ...
  • Shabani, A.; Kosut, R. L.; Rabitz, H.; Mohseni, Masoud; Lloyd, Seth (American Physical Society, 2011-07)
    We develop an efficient and robust approach for quantum measurement of nearly sparse many-body quantum Hamiltonians based on the method of compressive sensing. This work demonstrates that with only O(sln(d)) experimental ...
  • Ramanujam, Varun; Balakrishnan, Hamsa (Institute of Electrical and Electronics Engineers (IEEE), 2011-07)
    The runway configuration is the subset of the runways at an airport that are used for arrivals and departures at any time. Many factors, including weather (wind and visibility), expected arrival and departure demand, ...
  • Metaxoglou, Konstantinos; Knittel, Christopher Roland (MIT Press, 2014-03)
    We document the numerical challenges we experienced estimating random-coefficient demand models as in Berry, Levinsohn, and Pakes (1995) using two well-known data sets and a thorough optimization design. The optimization ...
  • Metaxoglou, Konstantinos; Knittel, Christopher Roland (MIT Press, 2014-03)
    We document the numerical challenges we experienced estimating random-coefficient demand models as in Berry, Levinsohn, and Pakes (1995) using two well-known data sets and a thorough optimization design. The optimization ...
  • Fisher, John W., III; Siracusa, Michael; Tieu, Kinh (Institute of Electrical and Electronics Engineers, 2009-02)
    Information measures have long been studied in the context of hypothesis testing leading to variety of bounds on performance based on the information content of a signal or the divergence between distributions. Here we ...
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