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Browsing MIT Open Access Articles by Title

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  • Speck, Jared R. (American Institute of Physics (AIP), 2012-08)
    In this article, we use an electromagnetic gauge-free framework to establish the existence of small-data global solutions to the Maxwell-Born-Infeld (MBI) system on the Minkowski spacetime background in 1+3 dimensions. ...
  • Qiu, Yihui; Perreault, David J.; Keim, Thomas A.; Kassakian, John G. (Institute of Electrical and Electronics Engineers (IEEE), 2011-07)
    A cam-based shear force-actuated electromechanical valve drive system offering variable valve timing in internal combustion engines was previously proposed and demonstrated. To transform this concept into a competitive ...
  • Fan, Kebin; Hwang, Harold Young; Liu, Mengkun; Strikwerda, Andrew C.; Sternbach, Aaron; Zhang, Jingdi; Zhao, Xiaoguang; Zhang, Xin; Nelson, Keith Adam; Averitt, Richard D. (2013-05)
    We demonstrate nonlinear metamaterial split ring resonators (SRRs) on GaAs at terahertz frequencies. For SRRs on doped GaAs films, incident terahertz radiation with peak fields of ∼20–160  kV/cm drives intervalley scattering. ...
  • Yamamoto, N.; Duong, H. M.; Wardle, Brian L.; Marconnet, A. M.; Goodson, K. E. (Institute of Materials, Minerals and Mining, 2011-08)
    Carbon nanotubes (CNTs) have been expected to enhance thermal conductivity in various materials including composites, for applications such as thermal interface materials. However, the thermal properties of bulk CNTs and ...
  • Weinberg, Nevin N.; Arras, Phil; Quataert, Eliot; Burkart, Josh (IOP Publishing, 2012-05)
    We study the excitation and damping of tides in close binary systems, accounting for the leading-order nonlinear corrections to linear tidal theory. These nonlinear corrections include two distinct physical effects: ...
  • Grady, N. K.; Yan, L.; Trugman, D.; Jia, Q.; Chen, H. T.; Taylor, A. J.; Perkins, Bradford G., Jr.; Hwang, Harold Young; Nelson, Keith Adam; Perkins Jr, Bradford G. (EDP Sciences, 2013-03)
    High power THz pulses induce near transparency in superconductive YBCO thin films below the critical temperature. THz pump/THz probe measurements reveal a decay of the induced transparency on the time scale of a few picoseconds.
  • Zhong, Tian; Wong, Franco N. C. (American Physical Society, 2013-08)
    Dispersion and its cancellation in entanglement-based nonlocal quantum measurements are of fundamental and practical interests. We report a demonstration of cancellation of femtosecond-level dispersion by inverting the ...
  • Halperin, B. I.; Shytov, A. V.; Abanin, Dmitry A.; Levitov, Leonid (American Physical Society, 2009-01)
    A nonlocal electric response in the spin Hall regime, resulting from spin diffusion mediating charge conduction, is predicted. The spin-mediated transport stands out due to its long-range character, and can give dominant ...
  • Kamrin, Kenneth N.; Koval, Georg (American Physical Society, 2012-04)
    Extending recent modeling efforts for emulsions, we propose a nonlocal fluidity relation for flowing granular materials, capturing several known finite-size effects observed in steady flow. We express the local Bagnold-type ...
  • Straub, D. N.; Waite, M. L.; Bourouiba, Lydia (Cambridge University Press, 2011-11)
    Turbulent flows subject to solid-body rotation are known to generate steep energy spectra and two-dimensional columnar vortices. The localness of the dominant energy transfers responsible for the accumulation of the energy ...
  • Diamond, P.H.; Sun, H.J.; Cziegler, I.; Podpaly, Y.A.; Rowan, W.L.; Delgado-Aparicio, L.; Ma, Y.; Marmar, E.S.; Rice, John E.; Gao, Chi; Reinke, Matthew Logan; Howard, Nathaniel Thomas; Hubbard, Amanda E.; Terry, James L.; Chilenski, Mark Alan; Ennever, Paul Chappell; Ernst, Darin R.; Greenwald, Martin J.; Hughes, Jerry W.; Marmar, Earl S.; Porkolab, Miklos; White, Anne E.; Wolfe, Stephen M. (IOP Publishing, 2013-02)
    Several seemingly unrelated effects in Alcator C-Mod ohmic L-mode plasmas are shown to be closely connected: non-local heat transport, core toroidal rotation reversals, energy confinement saturation and up/down impurity ...
  • Qiao, Lei; Rimoli, Julian J.; Chen, Ying; Schuh, Christopher A.; Radovitzky, Raul (American Physical Society, 2011-02)
    We propose a nonlocal continuum model to describe the size-dependent superelastic effect observed in recent experiments of single crystal Cu-Al-Ni shape memory alloys. The model introduces two length scales, one in the ...
  • Van Voorhis, Troy; Vydrov, Oleg A. (American Physical Society, 2009-08)
    We derive a nonlocal correlation functional that adequately describes van der Waals interactions not only in the asymptotic long-range regime but also at short range. Unlike its precursor, developed by Langreth, Lundqvist, ...
  • Vydrov, Oleg A.; Van Voorhis, Troy (American Institute of Physics, 2010-12)
    We devise a nonlocal correlation energy functional that describes the entire range of dispersion interactions in a seamless fashion using only the electron density as input. The new functional is considerably simpler than ...
  • Manalis, Scott R.; Sader, John E.; Burg, Thomas P. (American Physical Society, 2009-06)
    Nanomechanical resonators enable a range of precision measurements in air or vacuum, but strong viscous damping makes applications in liquid challenging. Recent experiments have shown that fluid damping is greatly reduced ...
  • Reinke, Matthew Logan; Rice, John E.; Hutchinson, Ian H.; Greenwald, Martin J.; Howard, Nathaniel Thomas; Hughes, Jerry W.; Irby, James Henderson; Podpaly, Yuri; Terry, James L.; White, Anne E. (IOP Publishing, 2013-03)
    We demonstrate that existing theories are insufficient to explain up/down asymmetries of argon x-ray emission in Alcator C-Mod ohmic plasmas. Instead of the poloidal variation, ñ[subscript z]/〈n[subscript z]〉, being of ...
  • Farias, Vivek F.; Jagabathula, Srikanth; Shah, Devavrat (2013-02)
    Choice models today are ubiquitous across a range of applications in operations and marketing. Real-world implementations of many of these models face the formidable stumbling block of simply identifying the “right” model ...
  • Fox, Emily Beth; Sudderth, Erik B.; Jordan, Michael I.; Willsky, Alan S. (International Federation of Automatic Control (IFAC), 2009-07)
    Many nonlinear dynamical phenomena can be effectively modeled by a system that switches among a set of conditionally linear dynamical modes. We consider two such Markov jump linear systems: the switching linear dynamical ...
  • Doshi-Velez, Finale P.; Wingate, David; Roy, Nicholas; Tenenbaum, Joshua B. (Neural Information Processing Systems Foundation, 2010-12)
    We consider reinforcement learning in partially observable domains where the agent can query an expert for demonstrations. Our nonparametric Bayesian approach combines model knowledge, inferred from expert information and ...
  • Zhu, Long; Chen, Yuanhao; Freeman, William T.; Torralba, Antonio (Neural Information Processing Systems Foundation, 2009-12)
    We present a nonparametric Bayesian method for texture learning and synthesis. A texture image is represented by a 2D Hidden Markov Model (2DHMM) where the hidden states correspond to the cluster labeling of textons and ...
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