Browsing by Title
Now showing items 77076-77095 of 143244
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Matrix Polysaccharides and SiaD Diguanylate Cyclase Alter Community Structure and Competitiveness of Pseudomonas aeruginosa during Dual-Species Biofilm Development with Staphylococcus aureus
(American Society for Microbiology, 2018)© 2018 Chew et al. Mixed-species biofilms display a number of emergent properties, including enhanced antimicrobial tolerance and communal metabolism. These properties may depend on interspecies relationships and the ... -
Matrix PRFs: Constructions, Attacks, and Applications to Obfuscation
(Springer International Publishing, 2019)© 2019, International Association for Cryptologic Research. We initiate a systematic study of pseudorandom functions (PRFs) that are computable by simple matrix branching programs; we refer to these objects as “matrix ... -
Matrix Probing and its Conditioning
(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 ... -
Matrix probing, skeleton decompositions, and sparse Fourier transform
(Massachusetts Institute of Technology, 2013)In this thesis, we present three different randomized algorithms that help to solve matrices, compute low rank approximations and perform the Fast Fourier Transform. Matrix probing and its conditioning When a matrix A with ... -
Matrix probing: A randomized preconditioner for the wave-equation Hessian
(Elsevier, 2011-03)This paper considers the problem of approximating the inverse of the wave-equation Hessian, also called normal operator, in seismology and other types of wave-based imaging. An expansion scheme for the pseudodifferential ... -
The matrix reloaded: the evolution of regenerative hydrogels
(Elsevier, 2016-05)Cell-laden hydrogels can regenerate lost, damaged or malfunctioning tissues. Clinical success of such hydrogels is strongly dependent on the ability to tune their chemical, physico-mechanical, and biological properties to ... -
Matrix Remodeling Maintains ESC Self-Renewal by Activating Stat3
(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 ... -
Matrix Scaling and Balancing via Box Constrained Newton's Method and Interior Point Methods
(IEEE, 2017-10)© 2017 IEEE. In this paper, we study matrix scaling and balancing, which are fundamental problems in scientific computing, with a long line of work on them that dates back to the 1960s. We provide algorithms for both these ... -
Matrix-Embedded Endothelial Cells Attain a Progenitor-Like Phenotype
(Wiley, 2017-07)Culture of endothelial cells (ECs) embedded in 3D scaffolds of denatured collagen has shown tremendous therapeutic potential in clinical trials of tissue repair. It is postulated that these matrix-embedded ECs (MEECs) ... -
A matrix-free linear programming duality theory
(Massachusetts Institute of Technology, 1979) -
Matroid prophet inequalities and Bayesian mechanism design
(Massachusetts Institute of Technology, 2012)Consider a gambler who observes a sequence of independent, non-negative random numbers and is allowed to stop the sequence at any time, claiming a reward equal to the most recent observation. The famous prophet inequality ... -
Matroids and integrality gaps for hypergraphic steiner tree relaxations
(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 ... -
Matroids Are Immune to Braess’ Paradox
(Institute for Operations Research and the Management Sciences (INFORMS), 2017-02)The famous Braess paradox describes the counterintuitive phenomenon in which, in certain settings, an increase of resources, such as a new road built within a congested network, may in fact lead to larger costs for the ... -
Matted fiber divertor targets for sputter resistance
(MIT Plasma Science and Fusion Center, 1981-01-01) -
Matter and singularities
(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 ... -
Matter in transition
(Springer Berlin Heidelberg, 2016-04)We explore a novel type of transition in certain 6D and 4D quantum field theories, in which the matter content of the theory changes while the gauge group and other parts of the spectrum remain invariant. Such transitions ... -
A matter of understanding : urban design strategies to integrate street vendors in Mumbai
(Massachusetts Institute of Technology, 2007)Resistance to informal markets appears related to a growing desire to modernize among citizens of developing countries. These markets, in their indigenous, often chaotic, form, are viewed as symbols as poverty and ... -
Matter wave optical techniques for probing many-body targets
(Massachusetts Institute of Technology, 2010)This thesis reports on our investigation of the uses of matter waves to probe many-body targets. We begin by discussing decoherence in an atom interferometer, in which a free gas acts as a refractive medium for a matter ... -
Matter, Mind and Models
(1965-03-01)This paper attempts to explain why people become confused by questions about the relation between menal and physical events. When a question leads to confused, inconsistent answers, this may be (1) because the question is ... -
Matter-Wave Scattering from Ultracold Atoms in an Optical Lattice
(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 ...
