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Browsing MIT Open Access Articles by Title

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  • Mou, Guobin; Yuan, Feng; Bu, Defu; Sun, Mouyuan; Su, Meng (Institute of Physics/American Astronomical Society, 2014-08)
    A pair of giant gamma-ray Bubbles has been revealed by Fermi-LAT. In this paper we investigate their formation mechanism. Observations have indicated that the activity of the supermassive black hole located at the Galactic ...
  • Park, J. S.; Sasaki, K.; Saito, R.; Izumida, W.; Kalbac, M.; Farhat, Hootan; Dresselhaus, Gene F.; Dresselhaus, Mildred (American Physical Society, 2009-08)
    The Fermi energy dependence of the G-band resonance Raman spectra of single-wall carbon nanotubes (SWNTs) is calculated, including the Kohn anomaly effect for metallic tubes. The gate voltage dependence of the G-band Raman ...
  • Vieira, Bruno G. M.; Barros, Eduardo B.; Vercosa, Daniel G.; Samsonidze, Georgy; Filho, Antonio G. Souza; Dresselhaus, Mildred (American Physical Society, 2014-07)
    In this work, we use an extended tight-binding approach for calculating the Fermi-energy dependence of the structural deformation of chiral single-wall carbon nanotubes (SWNTs). We show that, in general, nanotube strains ...
  • Connaughton, V.; Jenke, P.; van der Horst, A. J.; Camero-Arranz, A.; Kouveliotou, C.; Beklen, E.; Bhat, P. N.; Briggs, M. S.; Finger, M.; Paciesas, W. S.; Preece, R.; von Kienlin, A.; Wilson-Hodge, C. A.; Linares, Manu; Chakrabarty, Deepto (IOP Publishing, 2012-11)
    Thermonuclear bursts from slowly accreting neutron stars (NSs) have proven difficult to detect, yet they are potential probes of the thermal properties of the NS interior. During the first year of a systematic all-sky ...
  • Castro, Daniel; Slane, Patrick; Ellison, Donald C.; Patnaude, Daniel J. (IOP Publishing, 2012-08)
    CTB 109 (G109.1-1.0) is a Galactic supernova remnant (SNR) with a hemispherical shell morphology in X-rays and in the radio band. In this work, we report the detection of γ-ray emission coincident with CTB 109, using 37 ...
  • Castro, Daniel; Slane, Patrick; Carlton, Ashley; Figueroa-Feliciano, Enectali (IOP Publishing, 2013-08)
    We report the detection of γ-ray emission coincident with three supernova remnants (SNRs) using data from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. W41, G337.7-0.1, and MSH 17-39 are SNRs known ...
  • Auchettl, Katie; Slane, Patrick; Castro, Daniel (IOP Publishing, 2014-02)
    In this paper, we report on the detection of γ-ray emission coincident with the Galactic supernova remnant (SNR) Kesteven 79 (Kes 79). We analyzed approximately 52 months of data obtained with the Large Area Telescope on ...
  • Chiu, Yu-Ju; Chen, Xie; Chuang, Isaac L. (American Physical Society, 2013-01)
    Fermions, as a major class of quantum particles, provide platforms for quantum information processing beyond the possibilities of spins or bosons, which have been studied more extensively. One particularly interesting model ...
  • Shankar, R.; Senthil, Todadri (American Physical Society, 2009-01)
    The energy of a d-dimensional Fermi system typically varies only along d[subscript c]=1 (“radial”) dimensions. We consider d[subscript c]=1+ε and study a transition to superconductivity in an ε expansion. The nontrivial ...
  • Halilov, Samed; Ashman, Christopher R.; Hellberg, C. Stephen (American Physical Society, 2010-07)
    We present a density-functional theory investigation of strained Ca[subscript 0.5]Sr[subscript 0.5]TiO[subscript 3] (CSTO). We have determined the structure and polarization for a number of arrangements of Ca and Sr in a ...
  • Garrity, Kevin; Kakekhani, Arvin; Ismail-Beigi, Sohrab; Kolpak, Alexie M. (American Physical Society, 2013-07)
    Ferroelectric surfaces provide a promising method for modifying surface reactions via an external electric field, which can potentially provide an avenue for tunable molecular binding and surface catalysis. Using ...
  • Parolari, Anthony Joseph; Goulden, M. L.; Bras, Rafael L. (American Geophysical Union (AGU), 2012-04)
    Nitrogen limits leaf gas exchange, canopy development, and evapotranspiration in many ecosystems. In dryland ecosystems, it is unclear whether increased anthropogenic nitrogen inputs alter the widely recognized dominance ...
  • Schwartz, Ernst; Kasprian, Gregor; Gruber, Gerlinde M.; Prayer, Daniela; Langs, Georg; Jakab, András; Schöpf, Veronika (Frontiers Research Foundation, 2014-10)
    The functional connectivity architecture of the adult human brain enables complex cognitive processes, and exhibits a remarkably complex structure shared across individuals. We are only beginning to understand its heterogeneous ...
  • Chou, Song; Lodish, Harvey F. (National Academy of Sciences, 2010-03)
    Previously we showed that the ~2% of fetal liver cells reactive with an anti-CD3ε monoclonal antibody support ex vivo expansion of both fetal liver and bone marrow hematopoietic stem cells (HSCs); these cells express two ...
  • Young, David Y.; Young, John D.; Martel, Jan; Wu, Cheng-Yeu (Public Library of Science, 2009-11)
    Serum-derived granulations and purported nanobacteria (NB) are pleomorphic apatite structures shown to resemble calcium granules widely distributed in nature. They appear to be assembled through a dual inhibitory-seeding ...
  • Surmeier, D. James; Graybiel, Ann M.; Graybiel, Ann M. (Elsevier, 2012-07)
    In this issue of Neuron, Threlfell et al. (2012) report that synchronous activation of cholinergic interneurons evokes striatal dopamine release by activating presynaptic nicotinic acetylcholine receptors. These findings ...
  • Vuletic, Vladan; Peyronel, Thibault Michel Max; Lukin, M. D.; Zibrov, A. S.; Hafezi, M.; Balic, Vlatko; Hofferberth, Hofferberth; Bajcsy, M. (The International Society for Optical Engineering, 2009-02)
    Cold atoms confined inside a hollow-core photonic-crystal fiber with core diameters of a few photon wavelengths are a promising medium for studying nonlinear optical interactions at extremely low light levels. The high ...
  • Bajcsy, M.; Hofferberth, S.; Balic, Vlatko; Peyronel, Thibault Michel Max; Zibrov, A. S.; Hafezi, M.; Vuletic, Vladan; Lukin, M. D. (Society of Photo-Optical Instrumentation Engineers, 2009-02)
    Cold atoms confined inside a hollow-core photonic-crystal fiber with core diameters of a few photon wavelengths are a promising medium for studying nonlinear optical interactions at extremely low light levels. The high ...
  • Ku, Mark Jen-Hao; Sommer, Ariel Tjodolv; Cheuk, Lawrence W.; Zwierlein, Martin Wolfram; Houcke, K. Van; Werner, F.; Kozik, E.; Prokofev, N.; Svistunov, B.; Schirotzek, A. (Nature Publishing Group, 2012-03)
    Precise understanding of strongly interacting fermions, from electrons in modern materials to nuclear matter, presents a major goal in modern physics. However, the theoretical description of interacting Fermi systems is ...
  • Raj, Bhiksha; Turicchia, Lorenzo; Schmidt-Nielsen, Bent; Sarpeshkar, Rahul (Hindawi Publishing Corporation, 2007-06)
    We describe an FFT-based companding algorithm for preprocessing speech before recognition. The algorithm mimics tone-to-tone suppression and masking in the auditory system to improve automatic speech recognition performance ...
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