Institution
Massachusetts Institute of Technology
Education•Cambridge, Massachusetts, United States•
About: Massachusetts Institute of Technology is a education organization based out in Cambridge, Massachusetts, United States. It is known for research contribution in the topics: Population & Laser. The organization has 116795 authors who have published 268000 publications receiving 18272025 citations. The organization is also known as: MIT & M.I.T..
Topics: Population, Laser, Context (language use), Computer science, Gene
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors show that plasmons in doped graphene simultaneously enable low-loss and significant wave localization for frequencies below that of the optical phonon branch hbar omega{;Oph};\approx 0.2 eV.
Abstract: We point out that plasmons in doped graphene simultaneously enable low-losses and significant wave localization for frequencies below that of the optical phonon branch hbar omega_{;Oph};\approx 0.2 eV. Large plasmon losses occur in the interband regime (via excitation of electron-hole pairs), which can be pushed towards higher frequencies for higher doping values. For sufficiently large dopings, there is a bandwidth of frequencies from omega_{;Oph}; up to the interband threshold, where a plasmon decay channel via emission of an optical phonon together with an electron-hole pair is nonegligible. The calculation of losses is performed within the framework of a random-phase approximation and number conserving relaxation-time approximation. The measured DC relaxation-time serves as an input parameter characterizing collisions with impurities, whereas the contribution from optical phonons is estimated from the influence of the electron-phonon coupling on the optical conductivity. Optical properties of plasmons in graphene are in many relevant aspects similar to optical properties of surface plasmons propagating on dielectric-metal interface, which have been drawing a lot of interest lately because of their importance for nanophotonics. Therefore, the fact that plasmons in graphene could have low losses for certain frequencies makes them potentially interesting for nanophotonic applications.
1,983 citations
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TL;DR: For the first time, the nature of gravitational-wave polarizations from the antenna response of the LIGO-Virgo network is tested, thus enabling a new class of phenomenological tests of gravity.
Abstract: On August 14, 2017 at 10∶30:43 UTC, the Advanced Virgo detector and the two Advanced LIGO detectors coherently observed a transient gravitational-wave signal produced by the coalescence of two stellar mass black holes, with a false-alarm rate of ≲1 in 27 000 years. The signal was observed with a three-detector network matched-filter signal-to-noise ratio of 18. The inferred masses of the initial black holes are 30.5-3.0+5.7M⊙ and 25.3-4.2+2.8M⊙ (at the 90% credible level). The luminosity distance of the source is 540-210+130 Mpc, corresponding to a redshift of z=0.11-0.04+0.03. A network of three detectors improves the sky localization of the source, reducing the area of the 90% credible region from 1160 deg2 using only the two LIGO detectors to 60 deg2 using all three detectors. For the first time, we can test the nature of gravitational-wave polarizations from the antenna response of the LIGO-Virgo network, thus enabling a new class of phenomenological tests of gravity.
1,979 citations
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01 Jan 1984TL;DR: This paper revisited the acquisition theory and language learnability and language devlopment revisited in the context of lexical entries and lexical rules, assuming and postulating phrase structure rules phrase stucture rules - developmental considerations inflection complementation and control auxiliaries lexical entry and lexitional rules.
Abstract: Language learnability and language devlopment revisited the acquisition theory - assumptions and postulates phrase structure rules phrase stucture rules - developmental considerations inflection complementation and control auxiliaries lexical entries and lexical rules.
1,978 citations
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TL;DR: Activation of T cells, which increases HIV expression up to 50-fold, correlated with induction of a DNA binding protein indistinguishable from a recognized transcription factor, called NF-κB, with binding sites in the viral enhancer.
Abstract: Human immunodeficiency virus (HIV) production from latently infected T lymphocytes can be induced with compounds that activate the cells to secrete lymphokines. The elements in the HIV genome which control activation are not known but expression might be regulated through a variety of DNA elements. The cis-acting control elements of the viral genome are enhancer and promoter regions. The virus also encodes trans-acting factors specified by the tat-III and art genes. We have examined whether products specific to activated T cells might stimulate viral transcription by binding to regions on viral DNA. Activation of T cells, which increases HIV expression up to 50-fold, correlated with induction of a DNA binding protein indistinguishable from a recognized transcription factor, called NF-kappa B, with binding sites in the viral enhancer. Mutation of these binding sites abolished inducibility. That NF-kappa B acts in synergy with the viral tat-III gene product to enhance HIV expression in T cells may have implications for the pathogenesis of AIDS (acquired immune deficiency syndrome).
1,970 citations
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TL;DR: In this paper, it was shown that supergravity theories with gauged SO(N) internal symmetry have ground states with anti-de Sitter background geometry which are stable against fluctuations which vanish sufficiently fast at spatial infinity.
1,968 citations
Authors
Showing all 117442 results
Name | H-index | Papers | Citations |
---|---|---|---|
Eric S. Lander | 301 | 826 | 525976 |
Robert Langer | 281 | 2324 | 326306 |
George M. Whitesides | 240 | 1739 | 269833 |
Trevor W. Robbins | 231 | 1137 | 164437 |
George Davey Smith | 224 | 2540 | 248373 |
Yi Cui | 220 | 1015 | 199725 |
Robert J. Lefkowitz | 214 | 860 | 147995 |
David J. Hunter | 213 | 1836 | 207050 |
Daniel Levy | 212 | 933 | 194778 |
Rudolf Jaenisch | 206 | 606 | 178436 |
Mark J. Daly | 204 | 763 | 304452 |
David Miller | 203 | 2573 | 204840 |
David Baltimore | 203 | 876 | 162955 |
Rakesh K. Jain | 200 | 1467 | 177727 |
Ronald M. Evans | 199 | 708 | 166722 |