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Browsing MIT Open Access Articles by Title

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  • Agarwal, Alekh; Negahban, Sahand N.; Wainwright, Martin J. (Institute of Mathematical Statistics, 2012-10)
    Many statistical M-estimators are based on convex optimization problems formed by the combination of a data-dependent loss function with a norm-based regularizer. We analyze the convergence rates of projected gradient and ...
  • Goeke, Robert F.; Hewitt, Jacqueline N.; Morgan, Edward H.; Remillard, Ronald Alan; Williams, Christopher Leigh (IOP Publishing, 2012-10)
    We introduce the Fast Holographic Deconvolution method for analyzing interferometric radio data. Our new method is an extension of A-projection/software-holography/forward modeling analysis techniques and shares their ...
  • Bilgic, Berkin; Horn, Berthold Klaus Paul; Masaki, Ichiro (Institute of Electrical and Electronics Engineers (IEEE), 2010-08)
    We investigate a fast pedestrian localization framework that integrates the cascade-of-rejectors approach with the Histograms of Oriented Gradients (HoG) features on a data parallel architecture. The salient features of ...
  • Dubbs, Alexander Joseph; Seiler, Brad A.; Magnasco, Marcel O. (MIT Press, 2010-10)
    The metrization of the space of neural responses is an ongoing research program seeking to find natural ways to describe, in geometrical terms, the sets of possible activities in the brain. One component of this program ...
  • Dillon, Joshua Shane; Liu, Adrian Chi-Yan; Tegmark, Max Erik (American Physical Society, 2013-02)
    We develop and demonstrate an acceleration of the Liu and Tegmark quadratic estimator formalism for inverse variance foreground subtraction and power spectrum estimation in 21 cm tomography from O(N[superscript 3]) to ...
  • Jungers, Raphael M.; Protasov, Vladimir Y. (Society for Industrial and Applied Mathematics, 2011-06)
    The $p$-radius characterizes the average rate of growth of norms of matrices in a multiplicative semigroup. This quantity has found several applications in recent years. We raise the question of its computability. We prove ...
  • Mirny, Leonid A.; Mitchison, Tim; Maresca, Tom; Ohi, Ryoma; Groen, Aaron; Needleman, Daniel J. (American Society for Cell Biology, 2010-01)
    Metaphase spindles are steady-state ensembles of microtubules that turn over rapidly and slide poleward in some systems. Since the discovery of dynamic instability in the mid-1980s, models for spindle morphogenesis have ...
  • Perry, Jonathan; Ousterhout, Amy Elizabeth; Balakrishnan, Hari; Shah, Devavrat; Fugal, Hans (Association for Computing Machinery, 2014-08)
    An ideal datacenter network should provide several properties, including low median and tail latency, high utilization (throughput), fair allocation of network resources between users or applications, deadline-aware ...
  • Kedlaya, Kiran S.; Umans, Christopher (Society for Industrial and Applied Mathematics, 2011-12)
    We obtain randomized algorithms for factoring degree n univariate polynomials over $\mathbb{F}_q$ requiring $O(n^{1.5 + o(1)}\,{\rm log}^{1+o(1)} q+ n^{1 + o(1)}\,{\rm log}^{2+o(1)} q)$ bit operations. When ${\rm log}\, q ...
  • Zhang, Lei; Chan, Vincent W. S. (Institute of Electrical and Electronics Engineers (IEEE), 2010-12)
    Optical Flow Switching (OFS) is a promising architecture to provide end users with large transactions with cost-effective direct access to core network bandwidth. For very dynamic sessions that are bursty and only last a ...
  • Park, Sooho; Lim, Sejoon (Institute of Electrical and Electronics Engineers, 2009-12)
    This paper presents shadow detection methods for vision-based autonomous driving in an urban environment. Shadows misclassified as objects create problems in autonomous driving applications. Real-time efficient algorithms ...
  • Rycroft, Chris H.; Wong, Yee Lok; Bazant, Martin Z. (Elsevier, 2010-01)
    We develop a multiscale simulation method for dense granular drainage, based on the recently proposed spot model, where the particle packing flows by local collective displacements in response to diffusing “spots” of ...
  • Roy, Brandon Cain; Roy, Deb K. (International Speech Communication Association, 2009-09)
    We introduce a new method for human-machine collaborative speech transcription that is significantly faster than existing transcription methods. In this approach, automatic audio processing algorithms are used to robustly ...
  • Strang, W. Gilbert (National Academy of Sciences (U.S.), 2010-06)
    It is unusual for both A and A[superscript -1] to be banded—but this can be a valuable property in applications. Block-diagonal matrices F are the simplest examples; wavelet transforms are more subtle. We show that every ...
  • Demanet, Laurent; Ying, Lexing (American Mathematical Society (AMS), 2012-02)
    This paper presents a numerical method for ``time upscaling'' wave equations, i.e., performing time steps not limited by the Courant-Friedrichs-Lewy (CFL) condition. The proposed method leverages recent work on fast ...
  • Korolev, Kirill Sergeevich (Public Library of Science, 2013-03)
    Species expand their geographical ranges following an environmental change, long range dispersal, or a new adaptation. Range expansions not only bring an ecological change, but also affect the evolution of the expanding ...
  • Craig, Nathaniel; Stolarski, Daniel; Thaler, Jesse (Springer-Verlag, 2011-11)
    We introduce a novel composite Higgs theory based on con ning supersymmetric QCD. Supersymmetric duality plays a key role in this construction, with a "fat" Higgs boson emerging as a dual magnetic degree of freedom charged ...
  • Pindyck, Robert S. (Oxford University Press, 2012)
    Climate policy is complicated by the considerable uncertainties concerning the benefits and costs of abatement. We do not even know the probability distributions for future temperatures and impacts, making benefit–cost ...
  • Orji, Uzoma A.; Remscrim, Zachary N.; Laughman, Christopher Reed; Leeb, Steven B.; Wichakool, Warit; Schantz, Christopher James; Cox, Robert A.; Paris, James; Kirtley, James L., Jr.; Norford, Leslie Keith (Institute of Electrical and Electronics Engineers (IEEE), 2010-03)
    Harmonic analysis of motor current has been used to track the speed of motors for sensorless control. Algorithms exist that track the speed of a motor given a dedicated stator current measurement, for example. Harmonic ...
  • Vitale, Steven A.; Wyatt, Peter W.; Checka, Nisha; Kedzierski, Jakub T.; Keast, Craig L. (Institute of Electrical and Electronics Engineers (IEEE), 2010-02)
    Ultralow-power electronics will expand the technological capability of handheld and wireless devices by dramatically improving battery life and portability. In addition to innovative low-power design techniques, a complementary ...
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