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Browsing MIT Open Access Articles by Title

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  • Hsu, Bo-June; Glass, James R. (Institute of Electrical and Electronics Engineers, 2009-05)
    In limited data domains, many effective language modeling techniques construct models with parameters to be estimated on an in-domain development set. However, in some domains, no such data exist beyond the unlabeled test ...
  • Bedny, Marina; Pascual-Leone, Alvaro; Dodell-Feder, David; Fedorenko, Evelina G.; Saxe, Rebecca R. (National Academy of Sciences (U.S.), 2011-03)
    Humans are thought to have evolved brain regions in the left frontal and temporal cortex that are uniquely capable of language processing. However, congenitally blind individuals also activate the visual cortex in some ...
  • Duncan, John; Kanwisher, Nancy; Fedorenko, Evelina G. (Elsevier, 2012-11)
    In 1861, Paul Broca stood up before the Anthropological Society of Paris and announced that the left frontal lobe was the seat of speech. Ever since, Broca’s eponymous brain region has served as a primary battleground for ...
  • Bolhuis, Johan J.; Tattersall, Ian; Berwick, Robert C.; Chomsky, Avram Noam (Public Library of Science, 2015-02)
    Lieberman’s commentary [1] nicely illustrates our original argument [2] that analysis of language evolution is complicated by a lack of agreement about the concepts of both “language” and “evolution.” Here we address each ...
  • Imperiali, Barbara (Elsevier, 2010-01)
    Lanthanide-tagged proteins are valuable for exploiting the unique properties of Ln ions for investigating protein structure, function, and dynamics. Introduction of the Ln into the target is accomplished via chemical ...
  • Kausel, Eduardo A.; Irfan Baig, Mirza M. (American Mathematical Society (AMS), 2011-09)
    This note deals with the Laplace transforms of integrands of the form $ {x^\lambda }{J_\alpha }\left( {ax} \right){J_\beta }\left( {bx} \right)$, which are found in numerous fields of application. Specifically, we provide ...
  • Taylor, Joshua A.; Hover, Franz S. (Society for Industrial and Applied Mathematics, 2011-09)
    We define a class of Laplacians for multicommodity, undirected flow networks, and bound their smallest nonzero eigenvalues with a generalization of the sparsest cut.
  • Ohannessian, Mesrob I.; Dahleh, Munther A. (Institute of Electrical and Electronics Engineers (IEEE), 2012-03)
    How can we effectively model situations with large alphabets? On a pragmatic level, any engineered system, be it for inference, communication, or encryption, requires working with a finite number of symbols. Therefore, the ...
  • Ng, Trevor S. K.; McKinley, Gareth H.; Ewoldt, Randy H. (American Institute of Physics, 2011-03)
    In a previous paper [T. S. K. Ng and G. H. McKinley, J. Rheol.52(2), 417–449 (2008)], we demonstrated that gluten gels can best be understood as a polymericnetwork with a power-law frequency response that reflects the ...
  • Ewoldt, Randy H.; Winter, Peter; Maxey, Jason; McKinley, Gareth H. (Springer Berlin / Heidelberg, 2009-12)
    We explore the utility of strain-controlled large amplitude oscillatory shear (LAOS) deformation for identifying and characterizing apparent yield stress responses in elastoviscoplastic materials. Our approach emphasizes ...
  • Singh, Hanumant; Pizarro, Oscar; Eustice, Ryan M. (Institute of Electrical and Electronics Engineers, 2009-04)
    Robotic underwater vehicles are regularly performing vast optical surveys of the ocean floor. Scientists value these surveys since optical images offer high levels of detail and are easily interpreted by humans. Unfortunately, ...
  • Boning, Duane S.; Taylor, Hayden Kingsley; Youcef-Toumi, Kamal; Xu, Zhiguang; Yoon, Soon Fatt (Optical Society of America, 2009-09)
    A moiré fringe approach is developed to identify simultaneously the global and local distortions in hot-embossed polymeric samples. A square grid pattern with a pitch of 63.5 μm is hot-embossed on the polymer substrate. ...
  • Rinnerbauer, Veronika; Ndao, Sidy; Yeng, Yi Xiang; Senkevich, Jay J.; Jensen, Klavs F.; Joannopoulos, John D.; Soljacic, Marin; Celanovic, Ivan; Geil, Robert D. (American Vacuum Society (AVS), 2012-12)
    The authors present highly selective emitters based on two-dimensional tantalum (Ta) photonic crystals, fabricated on 2 in. polycrystalline Ta substrates, for high-temperature applications, e.g., thermophotovoltaic energy ...
  • Rinnerbauer, V.; Yeng, Y. X.; Senkevich, Jay; Joannopoulos, John D.; Soljacic, Marin; Celanovic, Ivan (Society of Photo-Optical Instrumentation Engineers (SPIE), 2013-02)
    We report highly selective emitters based on high-aspect ratio 2D photonic crystals (PhCs) fabricated on large area (2 inch diameter) polycrystalline tantalum substrates, suitable for high-temperature operation. As an ...
  • Tong, Lang; Tan, Vincent Yan Fu; Anandkumar, Animashree; Willsky, Alan S. (2009-08)
    The problem of maximum-likelihood learning of the structure of an unknown discrete distribution from samples is considered when the distribution is Markov on a tree. Large-deviation analysis of the error in estimation of ...
  • Tan, Vincent Yan Fu; Willsky, Alan S.; Anandkumar, Animashree; Tong, Lang (Institute of Electrical and Electronics Engineers (IEEE), 2011-03)
    The problem of maximum-likelihood (ML) estimation of discrete tree-structured distributions is considered. Chow and Liu established that ML-estimation reduces to the construction of a maximum-weight spanning tree using the ...
  • Li, Xian-Xiang; Britter, Rex E.; Koh, Tieh Yong; Norford, Leslie Keith; Liu, Chun-Ho; Entekhabi, Dara; Leung, Dennis Y. C. (Springer-Verlag, 2010-08)
    Our study employed large-eddy simulation (LES) based on a one-equation subgrid-scale model to investigate the flow field and pollutant dispersion characteristics inside urban street canyons. Unstable thermal stratification ...
  • Law, Adrian Wing-Keung; Adams, E. Eric; Fringer, Oliver B.; Wang, Ruoqian (Springer-Verlag, 2010-12)
    A series of Large Eddy Simulations (LES) are performed to investigate the penetration of starting buoyant jets. The LES code is first validated by comparing simulation results with existing experimental data for both steady ...
  • Ueda, Jun; Secord, Thomas W.; Asada, Harry (Institute of Electrical and Electronics Engineers, 2010-08)
    Design and analysis of piezoelectric actuators having over 20% effective strain using an exponential strain amplification mechanism are presented in this paper. Piezoelectric ceramic material, such as lead zirconate titanate ...
  • Hohm, Olaf; Zwiebach, Barton (Springer-Verlag, 2013-02)
    Finite gauge transformations in double field theory can be defined by the exponential of generalized Lie derivatives. We interpret these transformations as ‘generalized coordinate transformations’ in the doubled space by ...
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