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Browsing MIT Open Access Articles by Title

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  • Khot, Subhash; Moshkovitz, Hadar Dana (Association for Computing Machinery, 2011-06)
    In this paper, we consider the problem of approximately solving a system of homogeneous linear equations over reals, where each equation contains at most three variables. Since the all-zero assignment always satisfies ...
  • Tsitsiklis, John N. (Elsevier, 2006-08)
    The unichain condition requires that every policy in an MDP result in a single ergodic class, and guarantees that the optimal average cost is independent of the initial state. We show that checking whether the unichain ...
  • Ahmadi, Amir Ali; Olshevsky, Alexander; Parrilo, Pablo A.; Tsitsiklis, John N. (Springer-Verlag, 2011-11)
    We show that unless P = NP, there exists no polynomial time (or even pseudo-polynomial time) algorithm that can decide whether a multivariate polynomial of degree four (or higher even degree) is globally convex. This solves ...
  • Jaenisch, Rudolf (Elsevier, 2012-12)
    This year’s Nobel Prize in Physiology or Medicine was awarded to John Gurdon and Shinya Yamanaka for solving key problems of biology. Their work provided fundamental insights into how an egg gives rise to a complex organism ...
  • Detmold, William; Orginos, Kostas (American Physical Society, 2013-06)
    We consider the problem of calculating the large number of Wick contractions necessary to compute states with the quantum numbers of many baryons in lattice QCD. We consider a constructive approach and a determinant-based ...
  • Poggio, M.; Mamin, H. J.; Degen, Christian; Sherwood, M. H.; Rugar, D. (American Physical Society, 2009-02)
    We demonstrate nuclear double resonance for nanometer-scale volumes of spins where random fluctuations rather than Boltzmann polarization dominate. When the Hartmann-Hahn condition is met in a cross-polarization experiment, ...
  • Dooley, Alison L.; Winslow, Monte Meier; Chiang, Derek Y.; Banerji, Shantanu; Stransky, Nicolas; Dayton, Talya Lucia; Snyder, Eric; Senna, Stephanie; Whittaker, Charles A.; Bronson, Roderick T.; Crowley, Denise G.; Barretina, Jordi; Garraway, Levi A.; Meyerson, Matthew L.; Jacks, Tyler E. (Cold Spring Harbor Laboratory Press in association with The Genetics Society, 2011-10)
    Small cell lung cancer (SCLC) is an aggressive cancer often diagnosed after it has metastasized. Despite the need to better understand this disease, SCLC remains poorly characterized at the molecular and genomic levels. ...
  • Russo, Scott J.; Wilkinson, Matthew B.; Mazei-Robison, Michelle S.; Dietz, David M.; Maze, Ian; Krishnan, Vaishnav; Rentha, William; Graham, Ami; Birnbaum, Shari G.; Green, Thomas A.; Robison, Bruce; Lesselyong, Alan; Perrotti, Linda I.; Bolaños, Carlos A.; Kumar, Arvind; Clark, Michael S.; Neumaier, John F.; Bhakar, Asha L.; Barker, Philip A.; Nestler, Eric J.; Neve, Rachael L. (Society for Neuroscience, 2009-03)
    Although chronic cocaine-induced changes in dendritic spines on nucleus accumbens (NAc) neurons have been correlated with behavioral sensitization, the molecular pathways governing these structural changes, and their ...
  • Gerardi, Craig; Cory, David G.; Buongiorno, Jacopo; Hu, Lin-Wen; McKrell, Thomas J. (American Institute of Physics, 2009-12)
    Layering of water molecules on the surface of alumina nanoparticles in an alumina/water nanofluid is studied using nuclear magnetic resonance (NMR). The data suggest that a thin ordered layer ( ∼ 1.4 nm) of water molecules ...
  • Brohawn, Stephen G.; Partridge, James R.; Whittle, James Richardson Ross; Schwartz, Thomas (Elsevier, 2009-07)
    Nuclear pore complexes (NPCs) perforate the nuclear envelope and represent the exclusive passageway into and out of the nucleus of the eukaryotic cell. Apart from their essential transport function, components of the NPC ...
  • Chakrabarty, Deepto (IOP Publishing, 2013-05)
    The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 2012 June 13, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates in the band from 3 to 79 keV, extending the sensitivity of ...
  • Rudner, M. S.; Koppens, F. H. L.; Folk, J. A.; Vandersypen, L. M. K.; Levitov, Leonid (American Physical Society, 2011-08)
    Transport through spin-blockaded quantum dots provides a means for electrical control and detection of nuclear spin dynamics in the host material. Although such experiments have become increasingly popular in recent years, ...
  • Moreno Diaz, Oscar; Donnelly, T. William (American Physical Society, 2014-01)
    High precision measurements of the parity-violating asymmetry in polarized electron scattering from nuclei can be used to extract information on nuclear and nucleon structure or to determine standard model couplings and ...
  • Clasie, Benjamin Michael Patrick; Gao, Haiyan; Seely, J. (American Physical Society, 2011-07)
    We have determined the transparency of the nuclear medium to kaons from A(e,e[superscript ′]K+) measurements on [superscript 12]C, [superscript 63]Cu, and [superscript 197]Au targets. The measurements were performed at the ...
  • Cziczo, Daniel James; Pierce, J. R.; Leaitch, W. R.; Liggio, J.; Westervelt, D. M.; Wainwright, C. D.; Abbatt, J. P. D.; Ahlm, L.; Al-Basheer, W.; Hayden, K. L.; Lee, A. K. Y.; Li, S. -M.; Russell, L. M.; Sjostedt, S. J.; Strawbridge, K. B.; Travis, M.; Vlasenko, A.; Wentzell, J. J. B.; Wiebe, H. A.; Wong, J. P. S.; Macdonald, A. M. (Copernicus GmbH, 2012-03)
    The Whistler Aerosol and Cloud Study (WACS 2010), included intensive measurements of trace gases and particles at two sites on Whistler Mountain. Between 6–11 July 2010 there was a sustained high-pressure system over the ...
  • Syritsyn, Sergey Nikolaevich; Bratt, Jonathan D.; Lin, Ming Fang; Meyer, Harvey B.; Negele, John W.; Pochinsky, Andrew; Procura, Massimiliano; Engelhardt, M.; Hägler, Ph.; Hemmert, T. R.; Schroers, W. (American Physical Society, 2010-02)
    We present a high-statistics calculation of nucleon electromagnetic form factors in Nf=2+1 lattice QCD using domain wall quarks on fine lattices, to attain a new level of precision in systematic and statistical errors. Our ...
  • Beane, S. R.; Chang, E.; Cohen, S. D.; Junnarkar, P.; Lin, H. W.; Luu, T. C.; Orginos, K.; Parreño, A.; Savage, M. J.; Walker-Loud, A.; Detmold, William (American Physical Society, 2013-08)
    The scattering lengths and effective ranges that describe low-energy nucleon-nucleon scattering are calculated in the limit of SU(3)-flavor symmetry at the physical strange-quark mass with lattice quantum chromodynamics. ...
  • Green, Jeremy Russell; Negele, John W.; Pochinsky, Andrew (American Physical Society, 2012-12)
    We present 2+1 flavor lattice QCD calculations of the nucleon scalar and tensor charges. Using the BMW clover-improved Wilson action with pion masses between 149 and 356 MeV and three source-sink separations between 0.9 ...
  • Bratt, Jonathan D.; Edwards, R. G.; Englehardt, M.; Hagler, Ph.; Lin, H. W.; Lin, M. F.; Meyer, Harvey B.; Musch, B.; Negele, John W.; Orginos, K.; Pochinsky, Andrew; Procura, Massimiliano; Richards, D. G.; Schroers, W.; Syritsyn, Sergey Nikolaevich (American Physical Society, 2010-11)
    We present high statistics results for the structure of the nucleon from a mixed-action calculation using 2+1 flavors of asqtad sea and domain-wall valence fermions. We perform extrapolations of our data based on different ...
  • Alexandrou, C.; Koutsou, G.; Negele, John W.; Proestos, Y.; Tsapalis, A. (American Physical Society, 2011-01)
    We calculate the electromagnetic, axial, and pseudoscalar form factors of the nucleon to Δ(1232) transition using two dynamical light degenerate quarks and a dynamical strange quark simulated with the domain wall fermion ...
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