Browsing MIT Open Access Articles by Title
Now showing items 4199-4218 of 55740
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Black hole gluing in de Sitter space
(Informa UK Limited, 2021)© 2021 Taylor & Francis Group, LLC. We construct dynamical many-black-hole spacetimes with well-controlled asymptotic behavior as solutions of the Einstein vacuum equation with positive cosmological constant. We accomplish ... -
Black hole jet power from impedance matching
(American Physical Society, 2015-10)Black hole jet power depends on the angular velocity of magnetic field lines, Ω[subscript F]. Force-free black hole magnetospheres typically have Ω[subscript F]/Ω[subscript H] ≈ 0.5, where Ω[subscript H] is the angular ... -
BLACK HOLE MASS ESTIMATES AND EMISSION-LINE PROPERTIES OF A SAMPLE OF REDSHIFT z > 6.5 QUASARS
(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 ... -
Black hole Meissner effect and Blandford-Znajek jets
(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 ... -
Black hole Meissner effect and entanglement
(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 ... -
THE BLACK HOLE SPIN AND SOFT X-RAY EXCESS OF THE LUMINOUS SEYFERT GALAXY FAIRALL 9
(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 ... -
Black Holes and Nonrelativistic Quantum Systems
(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 ... -
Black holes, information, and Hilbert space for quantum gravity
(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 ... -
Black into green: A BIG opportunity for North Dakota’s oil and gas producers
(Elsevier BV, 2019-05)A new perspective on carbon economics is developed and applied to demonstrate that oil and natural gas producers in North Dakota (ND) have an opportunity to make a profitable transition to wind energy producers. ND's oil ... -
Black-box circular-secure encryption beyond affine functions
(Springer Berlin / Heidelberg, 2011-03)We show how to achieve public-key encryption schemes that can securely encrypt nonlinear functions of their own secret key. Specifically, we show that for any constant d ∈ ℕ, there exists a public-key encryption scheme ... -
The Blackbird Dataset: A Large-Scale Dataset for UAV Perception in Aggressive Flight
(Springer Science and Business Media LLC, 2020) -
Blackbox polynomial identity testing for depth 3 circuits
(Institute of Electrical and Electronics Engineers, 2010-03)We study EIIE(k) circuits, i.e., depth three arithmetic circuits with top fanin k. We give the first deterministic polynomial time blackbox identity test for EIIE(k) circuits over the field Q of rational numbers, thus ... -
Blade dynamics in combined waves and current
(Elsevier BV, 2019-05)Submerged aquatic vegetation (SAV), such as seagrass, is flexible and reconfigures (bends) in response to waves and current. The blade motion and reconfiguration modify the hydrodynamic drag. The modified drag can be ... -
Blade Loading Effects on Axial Turbine Tip Leakage Vortex Dynamics and Loss
(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 ... -
Blame Trees
(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 ... -
Blank Language Models
(Association for Computational Linguistics (ACL), 2020) -
Blended particle filters for large-dimensional chaotic dynamical systems
(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 ... -
Blendenpik: Supercharging LAPACK's Least-Squares Solver
(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 ... -
Blending Modified Gaussian Closure and Non-Gaussian Reduced Subspace Methods for Turbulent Dynamical Systems
(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 ... -
Blessings in disguise: biological benefits of prion-like mechanisms
(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 ...
