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Browsing MIT Open Access Articles by Title

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  • 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 ...
  • Rock, Jeremy Michael; Amon, Angelika B. (Elsevier Ltd., 2009-12)
    Mitosis is governed by the oscillation of cyclin dependent kinase (CDK) activity and ubiquitin-dependent proteolysis. Entry into mitosis is initiated by mitotic cyclin-CDK activation. Anaphase onset occurs upon activation ...
  • Ruan, Liangzhong; Lau, Vincent K. N.; Win, Moe Z. (Institute of Electrical and Electronics Engineers (IEEE), 2012-07)
    Attributed by its breakthrough performance in interference networks, interference alignment (IA) has attracted great attention in the last few years. However, despite the tremendous works dedicated to IA, the feasibility ...
  • Sun, Ruoshi; Ceder, Gerbrand (American Physical Society, 2011-12)
    We use first-principles computations to investigate whether the band gap of pyrite FeS₂ can be increased by alloying in order to make it a more effective photovoltaic material. In addition to the isostructural compounds ...
  • Ahn, Jooeun; Hogan, Neville (Institute of Electrical and Electronics Engineers, 2010-08)
    Dynamically entraining human gait with periodic torque from a robot may provide an approach to walking therapy that is uniquely supportive of normal biological function. To test the feasibility of this approach we perturbed ...
  • Sieron, Scott B.; Zhang, Fuqing; Emanuel, Kerry Andrew (American Geophysical Union (AGU), 2013-10)
    This study evaluates the potential of a proposed technique in using satellite-borne radiometer measurements and weather analyses to estimate the intensity of tropical cyclones. This theory shows that intensity is essentially ...
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