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Browsing MIT Open Access Articles by Title

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  • Simcoe, Robert A. (IOP Publishing, 2014-07)
    We present the analysis of optical and near-infrared spectra of the only four z > 6.5 quasars known to date, discovered in the UKIDSS-LAS and VISTA-VIKING surveys. Our data set consists of new Very Large Telescope/X-Shooter ...
  • Penna, Robert (American Physical Society, 2014-05)
    Spinning black holes tend to expel magnetic fields. In this way they are similar to superconductors. It has been a persistent concern that this black hole “Meissner effect” could quench jet power at high spins. This would ...
  • Penna, Robert (American Physical Society, 2014-08)
    Extremal black holes tend to expel magnetic and electric fields. Fields are unable to reach the horizon because the length of the black hole throat blows up in the extremal limit. The length of the throat is related to the ...
  • Nickel, Marcel Dominik Johannes; Kovtun, Pavel (American Physical Society, 2009-01)
    We describe black holes in d+3 dimensions, whose thermodynamic properties correspond to those of a scale-invariant nonrelativistic (d+1)-dimensional quantum system with a dynamical exponent z=2. The gravitational model ...
  • Nomura, Yasunori; Varela, Jaime; Weinberg, Sean J. (American Physical Society, 2013-04)
    A coarse-grained description for the formation and evaporation of a black hole is given within the framework of a unitary theory of quantum gravity preserving locality, without dropping the information that manifests as ...
  • Lohfink, Anne M.; Reynolds, Christopher S.; Miller, Jon M.; Brenneman, Laura W.; Mushotzky, Richard F.; Nowak, Michael A.; Fabian, Andrew C. (IOP Publishing, 2012-09)
    We present an analysis of all XMM-Newton and Suzaku X-ray spectra of the nearby luminous Seyfert galaxy Fairall 9. Confirming previous analyses, we find robust evidence for a broad iron line associated with X-ray reflection ...
  • Clemens, E. F.; Gegg, S. G.; Turner, E. R.; Huang, Arthur C.; Greitzer, Edward M.; Tan, Choon S. (ASME International, 2012-06)
    umerical simulations have been carried out to define the loss generation mechanisms associated with tip leakage in un-shrouded axial turbines. Tip clearance vortex dynamics are a dominant feature of two mechanisms important ...
  • Demaine, Erik D.; Panchekha, Pavel; Wilson, David A.; Yang, Edward Z. (Springer-Verlag Berlin Heidelberg, 2013)
    We consider the problem of merging individual text documents, motivated by the single-file merge algorithms of document-based version control systems. Abstracting away the merging of conflicting edits to an external conflict ...
  • Beyeler, Anna; Felix-Ortiz, Ada Celis; Seo, Changwoo; Leppla, Christopher Albert; Wildes, Craig P.; Tye, Kay (Elsevier, 2013-08)
    The basolateral amygdala (BLA) and ventral hippocampus (vHPC) have both been implicated in mediating anxiety-related behaviors, but the functional contribution of BLA inputs to the vHPC has never been directly investigated. ...
  • Sapsis, Themistoklis; Majda, Andrew J.; Qi, Di (National Academy of Sciences (U.S.), 2014-05)
    Combining large uncertain computational models with big noisy datasets is a formidable problem throughout science and engineering. These are especially difficult issues when real-time state estimation and prediction are ...
  • Maymounkov, Petar Borissov; Toledo, Sivan; Avron, Haim (Society for Industrial and Applied Mathematics, 2010-04)
    Several innovative random-sampling and random-mixing techniques for solving problems in linear algebra have been proposed in the last decade, but they have not yet made a significant impact on numerical linear algebra. We ...
  • Sapsis, Themistoklis Panagiotis; Majda, Andrew J. (Springer US, 2013-07)
    Turbulent dynamical systems are characterized by persistent instabilities which are balanced by nonlinear dynamics that continuously transfer energy to the stable modes. To model this complex statistical equilibrium in the ...
  • Newby, Gregory Arthur; Lindquist, Susan (Elsevier, 2013-06)
    Prions and amyloids are often associated with disease, but related mechanisms provide beneficial functions in nature. Prion-like mechanisms (PriLiMs) are found from bacteria to humans, where they alter the biological and ...
  • Chu, Li-Fang; Surani, M. Azim; Jaenisch, Rudolf; Zwaka, Thomas P. (Elsevier, 2011-10)
    Despite recent critical insights into the pluripotent state of embryonic stem cells (ESCs), there is little agreement over the inaugural and subsequent steps leading to its generation [1, 2, 3 and 4]. Here we show that ...
  • Schloerb, David W.; Lahav, Orly; Desloge, Joseph G.; Srinivasan, Mandayam A. (Institute of Electrical and Electronics Engineers, 2010-04)
    BlindAid is a virtual environment (VE) system that enables blind people to more easily learn about new environments on their own. The system is implemented on a desktop personal computer with a Phantom® haptic interface ...
  • Divi, Vijay; Wornell, Gregory W. (Institute of Electrical and Electronics Engineers, 2009-05)
    The performance of time-interleaved analog-to-digital converters is often significantly degraded by timing mismatch errors. We develop methods for performing blind calibration of such converters, i.e., for estimating the ...
  • Mueller, Amy V.; Herring, Keith T.; Staelin, David H. (Institute of Electrical and Electronics Engineers, 2009-09)
    In this paper a second-order method for blind source separation of noisy instantaneous linear mixtures is presented for the case where the signal order k is unknown. Its performance advantages are illustrated by simulations ...
  • Agarwal, Sameer; Iyer, Anand P.; Panda, Aurojit; Mozafari, Barzan; Stoica, Ion; Madden, Samuel R. (Association for Computing Machinery (ACM), 2012-08)
    In this demonstration, we present BlinkDB, a massively parallel, sampling-based approximate query processing framework for running interactive queries on large volumes of data. The key observation in BlinkDB is that one ...
  • Agarwal, Sameer; Mozafari, Barzan; Panda, Aurojit; Milner, Henry; Stoica, Ion; Madden, Samuel R. (Association for Computing Machinery (ACM), 2013-04)
    In this paper, we present BlinkDB, a massively parallel, approximate query engine for running interactive SQL queries on large volumes of data. BlinkDB allows users to trade-off query accuracy for response time, enabling ...
  • Mirzazadeh, Reza; Garnerone, Silvano; Schneider, Martin W.; Kallas, Tomasz; Custodio, Joaquin; Wernersson, Erik; Bienko, Magda; Crosetto, Nicola; Yan, Winston Xia; Scott, David Arthur; Li, Yinqing; Gao, Linyi; Federova, Yana; Zetsche, Bernd; Zhang, Feng (Nature Publishing Group, 2017-05)
    Precisely measuring the location and frequency of DNA double-strand breaks (DSBs) along the genome is instrumental to understanding genomic fragility, but current methods are limited in versatility, sensitivity or practicality. ...
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