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Browsing MIT Open Access Articles by Title

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  • Gruber, Jonathan; Hendren, Nathaniel; Townsend, Robert (American Economic Association, 2014-01)
    This paper analyzes Thailand's 2001 healthcare reform, "30 Baht." The program increased funding available to hospitals to care for the poor and reduced copays to 30 Baht (~$0.75). Our estimates suggest the supply-side ...
  • Temin, Peter (MIT Press, 2010-10)
    In the depths of the Great Depression, John Maynard Keynes wrote that “[p]racticalmen, who believe themselves to be quite exempt from any intellectual influence, are usually the slaves of some defunct economist.”1 ...
  • Hohm, Olaf; Zwiebach, Barton (Springer-Verlag, 2015-01)
    We establish that the unusual two-form gauge transformations needed in the Green-Schwarz anomaly cancellation mechanism fit naturally into an α′-deformed generalized geometry. The algebra of gauge transformations is a ...
  • Tian, Zhiting; Esfarjani, Keivan; Chen, Gang (American Physical Society, 2014-06)
    Understanding and manipulating coherent phonon transport in solids is of interest both for enhancing the fundamental understanding of thermal transport as well as for many practical applications, including thermoelectrics. ...
  • Lemoine, Frank G.; Goossens, Sander; Sabaka, Terence J.; Nicholas, Joseph B.; Mazarico, Erwan; Rowlands, David D.; Loomis, Bryant D.; Chinn, Douglas S.; Neumann, Gregory A.; Smith, David Edmund; Zuber, Maria (American Geophysical Union (AGU), 2014-05)
    We have derived a gravity field solution in spherical harmonics to degree and order 900, GRGM900C, from the tracking data of the Gravity Recovery and Interior Laboratory (GRAIL) Primary (1 March to 29 May 2012) and Extended ...
  • Beck, Matthias; Haase, Christian; Sam, Steven V. (Springer Science + Business Media B.V., 2009-02)
    We examine domino tilings of rectangular boards, which are in natural bijection with perfect matchings of grid graphs. This leads to the study of their associated perfect matching polytopes, and we present some of their ...
  • Schmalensee, Richard; Heidel, Timothy D.; Kassakian, John G. (Public Utilities Reports Inc., 2012-01)
    A few years ago, former Secretary of Energy Bill Richardson characterized the U.S. electric grid, the system of physical and human systems linking generators to loads, as “third-world.” 1 More recently, others have claimed ...
  • Rodi, William L. (Elsevier, 2006-06)
    This study employs an event location algorithm based on grid search to investigate the possibility of improving seismic event location accuracy by using non-Gaussian error models. The primary departure from the Gaussian ...
  • Chen, Gang; Lan, Yucheng; Wang, Hui; Ren, Zhifeng; Wang, Dezhi (Hindawi Pub. Corp., 2010-06)
    New TEM grids coated with ultrathin amorphous Al2O3 films have been developed using atomic layer deposition technique. The amorphous Al2O3 films can withstand temperatures over 600∘C in air and 900∘C in vacuum when the ...
  • Levin, Z.; Ardon Dryer, Karin (Copernicus GmbH, 2014-05)
    Ice nuclei were measured in immersion-freezing mode in the eastern Mediterranean region using the FRIDGE-TAU (FRankfurt Ice-nuclei Deposition freezinG Experiment, the Tel Aviv University version) chamber. Aerosol particles ...
  • Shporer, A.; Winn, Joshua Nathan; Dreizler, Stefan; Colon, Knicole D.; Wood-Vasey, W. M.; Choi, P. I.; Morley, C.; Moutou, C.; Welsh, W. F.; Pollaco, D.; Starkey, D.; Adams, E.; Barros, S. C. C.; Bouchy, F.; Cabrera-Lavers, A.; Cerutti, S.; Coban, L.; Costello, K.; Deeg, H.; Diaz, R. F.; Esquerdo, G. A.; Fernandez, J.; Fleming, S. W.; Ford, E. B.; Fulton, B. J.; Good, M.; Hebrard, G.; Holman, M. J.; Hunt, M.; Kadakia, S.; Lander, G.; Lockhart, Matthew; Mazeh, T.; Morehead, R. C.; Nelson, B. E.; Nortmann, L.; Reyes, F.; Roebuck, E.; Rudy, A. R.; Ruth, R.; Simpson, E.; Vincent, C.; Weaver, G.; Xie, J. W. (IOP Publishing, 2010-09)
    We present ground-based optical observations of the 2009 September and 2010 January transits of HD 80606b. Based on three partial light curves of the 2009 September event, we derive a midtransit time of Tc [HJD] = 2455099.196 ...
  • Jordan, Andres; Espinoza, Nestor; Rabus, Markus; Eyheramendy, Susana; Sing, David K.; Desert, Jean-Michel; Bakos, Gaspar A.; Fortney, Jonathan J.; Lopez-Morales, Mercedes; Maxted, Pierre F. L.; Triaud, Amaury; Szentgyorgyi, Andrew (Institute of Physics/American Astronomical Society, 2013-12)
    We present a ground-based optical transmission spectrum of the inflated sub-Jupiter-mass planet WASP-6b. The spectrum was measured in 20 spectral channels from 480 nm to 860 nm using a series of 91 spectra over a complete ...
  • Guenther, Matthew G.; Young, Richard A.; Young, Richard A. (Elsevier, 2012-05)
    Growing mouse pluripotent stem cells in defined media with signaling inhibitors establishes a naive ground state different from that of cells grown in serum. Recently in Cell, Marks et al. (2012) reported differences in ...
  • Roy, Brandon C.; Vosoughi, Soroush; Roy, Deb K. (International Speech Communication Association, 2014-09)
    Natural language is rich and varied, but also highly structured. The rules of grammar are a primary source of linguistic regularity, but there are many other factors that govern patterns of language use. Language models ...
  • Tellex, Stefanie A.; Roy, Deb K. (Association for Computing Machinery, 2009-11)
    Spatial language video retrieval is an important real-world problem that forms a test bed for evaluating semantic structures for natural language descriptions of motion on naturalistic data. Video search by natural language ...
  • Pinto, Federico; Whittle, Andrew (American Society of Civil Engineers (ASCE), 2014-04)
    This paper presents simplified closed-form analytical solutions that can be used to interpret and predict ground movements caused by shallow tunneling in soft ground conditions. These solutions offer a more comprehensive ...
  • McDaniel, Matt W.; Nishihata, Takayuki; Brooks, Christopher A.; Iagnemma, Karl (Institute of Electrical and Electronics Engineers, 2010-05)
    To operate autonomously in forested environments, unmanned ground vehicles (UGVs) must be able to identify the load-bearing surface of the terrain (i.e. the ground). This paper presents a novel two-stage approach for ...
  • Teller, Seth; Huang, Albert S.; Koch, Olivier A.; Walter, Matthew R. (Institute of Electrical and Electronics Engineers (IEEE), 2010-07)
    Precise calibration of camera intrinsic and extrinsic parameters, while often useful, is difficult to obtain during field operation and presents scaling issues for multi-robot systems. We demonstrate a vision-based approach ...
  • Cohn, Henry; Kumar, Abhinav; Schurmann, Achill (American Physical Society, 2009-12)
    We study dimensional trends in ground states for soft-matter systems. Specifically, using a high-dimensional version of Parrinello-Rahman dynamics, we investigate the behavior of the Gaussian core model in up to eight ...
  • Hu, Qing; Reno, John L.; Chan, Chun Wang Ivan (American Institute of Physics (AIP), 2012-10)
    A terahertz quantum cascade laser (THz QCL) architecture is presented in which only the ground state subbands of each quantum well are involved in the transport and lasing transition. Compared to state-of-the art THz QCLs ...
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