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Browsing MIT Open Access Articles by Title

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  • Chiu, Jiawei; Demanet, Laurent (Society for Industrial and Applied Mathematics, 2012-02)
    When a matrix A with n columns is known to be well-approximated by a linear combination of basis matrices B1, . . . , Bp, we can apply A to a random vector and solve a linear system to recover this linear combination. The ...
  • Przybyla, Laralynne M.; Theunissen, Thorold W.; Jaenisch, Rudolf; Voldman, Joel (Wiley Blackwell, 2013-05)
    While a variety of natural and synthetic matrices have been used to influence embryonic stem cell (ESC) self-renewal or differentiation, and ESCs also deposit a rich matrix of their own, the mechanisms behind how extracellular ...
  • Goemans, Michel X.; Olver, Neil; Zenklusen, Rico; Rothvoss, Thomas (2012-05)
    Until recently, LP relaxations have only played a very limited role in the design of approximation algorithms for the Steiner tree problem. In particular, no (efficiently solvable) Steiner tree relaxation was known to have ...
  • Taylor, Washington; Morrison, David R. (Springer-Verlag, 2012-01)
    We analyze the structure of matter representations arising from codimension two singularities in F-theory, focusing on gauge groups SU(N). We give a detailed local description of the geometry associated with several types ...
  • Sanders, Scott N.; Mintert, Florian; Heller, Eric J. (American Physical Society, 2010-07)
    We study matter-wave scattering from an ultracold, many-body atomic system trapped in an optical lattice. The angular cross section of the target lattice for a matter wave is determined and is demonstrated to have a strong ...
  • Azoulay, Pierre; Stuart, Toby; Wang, Yanbo (Institute for Operations Research and the Management Sciences (INFORMS), 2014-01)
    In a market context, a status effect occurs when actors are accorded differential recognition for their efforts depending on their location in a status ordering, holding constant the quality of these efforts. In practice, ...
  • Orlin, James B. (Association for Computing Machinery, 2013-06)
    In this paper, we present improved polynomial time algorithms for the max flow problem defined on sparse networks with n nodes and m arcs. We show how to solve the max flow problem in O(nm + m[superscript 31/16] log[superscript ...
  • Ryu, Sangjin; Lang, Matthew J.; Matsudaira, Paul T.; Lang, Matthew J. (Elsevier, 2012-09)
    The millisecond stalk contraction of the sessile ciliate Vorticella convallaria is powered by energy from Ca[superscript 2+] binding to generate contractile forces of ∼10 nN. Its contractile organelle, the spasmoneme, ...
  • Gunby, Benjamin P. (Electronic Journal of Combinatorics, 2014-08)
    A permutation σ ∈ S[subscript n] is a k-separator if all of its patterns of length k are distinct. Let F(k) denote the maximal length of a k-separator. Hegarty (2013) showed that k + ⌊√2k − 1⌋ − 1 ≤ F(k) ≤ k + ⌊√2k − 3⌋, ...
  • Savla, Ketan; Frazzoli, Emilio (Institute of Electrical and Electronics Engineers / IEEE Control Systems Society, 2010-08)
    In this technical note, we introduce a model of dynamical queue, in which the service time depends on the server utilization history. The proposed queueing model is motivated by widely accepted empirical laws describing ...
  • Leung, Debbie; Li, Ke; Smith, Graeme; Smolin, John A. (American Physical Society, 2014-07)
    Privacy is a fundamental feature of quantum mechanics. A coherently transmitted quantum state is inherently private. Remarkably, coherent quantum communication is not a prerequisite for privacy: there are quantum channels ...
  • Thaler, Jesse; Van Tilburg, Ken (Springer-Verlag, 2012-02)
    N -subjettiness is a jet shape designed to identify boosted hadronic objects such as top quarks. Given N subjet axes within a jet, N-subjettiness sums the angular distances of jet constituents to their nearest subjet axis. ...
  • Nieves, Veronica; Wang, Jingfeng; Bras, Rafael L.; Wood, Elizabeth B. (American Physical Society, 2010-09)
    Organizations of many variables in nature such as soil moisture and topography exhibit patterns with no dominant scales. The maximum entropy (ME) principle is proposed to show how these variables can be statistically ...
  • Zhang, Xiangxiong; Liu, Yuanyuan; Shu, Chi-Wang (Society for Industrial and Applied Mathematics, 2012-03)
    To easily generalize the maximum-principle-satisfying schemes for scalar conservation laws in [X. Zhang and C.-W. Shu, J. Comput. Phys., 229 (2010), pp. 3091–3120] to convection diffusion equations, we propose a nonconventional ...
  • Fox, Jacob; Lee, Choongbum; Sudakov, Benny (Springer Science + Business Media B.V., 2012-02)
    An old problem of Moser asks: what is the size of the largest union-free subfamily that one can guarantee in every family of m sets? A family of sets is called union-free if there are no three distinct sets in the family ...
  • Markakis, Mihalis G.; Tsitsiklis, John N.; Modiano, Eytan H. (Institute of Electrical and Electronics Engineers (IEEE), 2014-02)
    We consider the problem of scheduling in a single-hop switched network with a mix of heavy-tailed and light-tailed traffic and analyze the impact of heavy-tailed traffic on the performance of Max-Weight scheduling. As a ...
  • Morrison, Robert L., Jr.; Do, Minh N.; Munson, David C. (Institute of Electrical and Electronics Engineers, 2009-04)
    We present a new noniterative approach to synthetic aperture radar (SAR) autofocus, termed the multichannel autofocus (MCA) algorithm. The key in the approach is to exploit the multichannel redundancy of the defocusing ...
  • Naegle, Kristen Marie; Welsch, Roy E.; Yaffe, Michael B.; White, Forest M.; Lauffenburger, Douglas A. (Public Library of Science, 2011-07)
    Advances in proteomic technologies continue to substantially accelerate capability for generating experimental data on protein levels, states, and activities in biological samples. For example, studies on receptor tyrosine ...
  • Mitsos, Alexander; Chachuat, Benoit; Barton, Paul I. (Society for Industrial and Applied Mathematics, 2009-05)
    Theory and implementation for the global optimization of a wide class of algorithms is presented via convex/affine relaxations. The basis for the proposed relaxations is the systematic construction of subgradients for the ...
  • Stewart, Michelle L.; Fire, Emiko; Keating, Amy E.; Walensky, Loren D. (Nature Publishing Group, 2010-08)
    MCL-1 has emerged as a major oncogenic and chemoresistance factor. A screen of stapled peptide helices identified the MCL-1 BH3 domain as selectively inhibiting MCL-1 among the related anti-apoptotic Bcl-2 family members, ...
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