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Browsing MIT Open Access Articles by Title

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  • el Kaliouby, Rana; Mikhail, Mina (Institute of Electrical and Electronics Engineers, 2010-01)
    With recent advances in machine vision, automatic detection of human expressions in video is becoming important especially because human labeling of videos is both tedious and error prone. In this paper, we present an ...
  • Fang, Taotao; Buote, David A.; Humphrey, Phillip J.; Canizares, Claude R. (IOP Publishing, 2011-03)
    Since the launch of the Einstein X-ray Observatory in the 1970s, a number of broad absorption features have been reported in the X-ray spectra of BL Lac objects. These features are often interpreted as arising from ...
  • Gillon, M.; Deming, D.; Lovis, C.; Cubillos, P.; Harrington, J.; Stevenson, K. B.; Mayor, M.; Pepe, F.; Queloz, D.; Ségransan, D.; Udry, S.; Demory, Brice-Olivier; Valencia, Diana; Seager, Sara; Benneke, Bjoern (EDP Sciences, 2011-09)
    We report on the detection of a transit of the super-Earth 55 Cnc e with warm Spitzer in IRAC’s 4.5 μm band. Our MCMC analysis includes an extensive modeling of the systematic effects affecting warm Spitzer photometry, and ...
  • Li, Ping; Chakraborty, Sumit; Stubbe, JoAnne (American Chemical Society (ACS), 2009-08)
    Polyhydroxybutyrate (PHB) synthases catalyze the conversion of 3-hydroxybutyryl coenzyme A (HBCoA) to PHB with a molecular mass of 1.5 MDa. The class III synthase from Allochromatium vinosum is a tetramer of PhaEPhaC (each ...
  • Coughlin, Joseph F.; Feron, Eric; Mao, Zhi-Hong; Pilutti, Tom; Tijerina, Louis; Yang, Ji Hyun (Institute of Electrical and Electronics Engineers (IEEE), 2009-06)
    This paper aims to provide reliable indications of driver drowsiness based on the characteristics of driver-vehicle interaction. A test bed was built under a simulated driving environment, and a total of 12 subjects ...
  • Swager, Timothy Manning; Esser, Birgit (Wiley Blackwell, 2010-10)
    Ripe fruits: The fluorescence of a conjugated polymer is quenched by the presence of copper(I) moieties. Upon exposure to ethylene gas the copper complexes bind to ethylene and no longer quench the polymer fluorescence ...
  • Swager, Timothy Manning; Andrew, Trisha Lionel (American Chemical Society (ACS), 2011-03)
    The nitramine-containing explosive RDX and the nitroester-containing explosive PETN are shown to be susceptible to photofragmentation upon exposure to sunlight. Model compounds containing nitroester and nitramine moieties ...
  • Fitzmaurice, Maryann; Gardecki, Joseph A.; Angheloiu, George O.; Awasthi, Samir; Motz, Jason T.; Kramer, John R.; Feld, Michael S.; Scepanovic, Obrad R.; Dasari, Ramachandra Rao (SPIE, 2006-03)
    Vulnerable plaques, which are responsible for most acute ischemic events, are presently invisible to x-ray angiography. Their primary morphological features include a thin or ulcerated fibrous cap, a large necrotic core, ...
  • O’Donovan, Francis T.; Charbonneau, David; Harrington, Joseph; Madhusudhan, Nikku; Seager, Sara (IOP Publishing, 2010-02)
    We present here the results of our observations of TrES-2 using the Infrared Array Camera on Spitzer. We monitored this transiting system during two secondary eclipses, when the planetary emission is blocked by the star. ...
  • Manke, Kara Jean; Maznev, Alexei; Klieber, C.; Temnov, Vasily V.; Makarov, D.; Baek, S.-H.; Eom, C.-B.; Nelson, Keith Adam (American Institute of Physics, 2012-07)
    Short acoustic pulses are generated in SrRuO[subscript 3] transducers and detected at the surface of gold films by transient reflectivity. Contrary to expectations, acoustic pulses that are shorter than the optical skin ...
  • Jin, Hong; Heller, Daniel A.; Kalbacova, Marie; Kim, Jong-Ho; Zhang, Jingqing; Boghossian, Ardemis A.; Maheshri, Narendra; Strano, Michael S. (Nature Publishing Group, 2010-03)
    An emerging concept in cell signalling is the natural role of reactive oxygen species such as hydrogen peroxide (H₂O₂) as beneficial messengers in redox signalling pathways. The nature of H₂O₂ signalling is confounded, ...
  • Demory, Brice-Olivier; Gillon, Michael; Seager, Sara; Deming, Drake; Jackson, Brian (Institute of Physics Publishing, 2012-05)
    We report on the detection of infrared light from the super-Earth 55 Cnc e, based on four occultations obtained with Warm Spitzer at 4.5 μm. Our data analysis consists of a two-part process. In a first step, we perform ...
  • Roederer, Ian U.; Lawler, James E.; Cowan, John J.; Beers, Timothy C.; Frebel, Anna L.; Ivans, Inese I.; Schatz, Hendrik; Sobeck, Jennifer S.; Sneden, Christopher (IOP Publishing, 2012-02)
    Using near-ultraviolet spectra obtained with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope, we detect neutral tellurium in three metal-poor stars enriched by products of r-process nucleosynthesis, ...
  • Dutta, Sanjib; Gulla, Stefano; Chen, Tsan Chou Scott; Fire, Emiko; Grant, Robert A.; Keating, Amy E. (Elsevier, 2010-04)
    Interactions among Bcl-2 family proteins are important for regulating apoptosis. Prosurvival members of the family interact with proapoptotic BH3 (Bcl-2-homology-3)-only members, inhibiting execution of cell death through ...
  • Caradonna, Kacey; Burleigh, Barbara A.; Winter, Sebastian Virreira; Niedelman, Wendy Leah; Jensen, Kirk D. C.; Rosowski, Emily Elizabeth; Julien, Lindsay; Spooner, Eric; Saeij, Jeroen; Ploegh, Hidde; Frickel, Eva-Maria (Public Library of Science, 2011-09)
    IFN-γ is a major cytokine that mediates resistance against the intracellular parasite Toxoplasma gondii. The p65 guanylate-binding proteins (GBPs) are strongly induced by IFN-γ. We studied the behavior of murine GBP1 (mGBP1) ...
  • Viswanathan, Karthik; Koh, Xiaoying; Chandrasekaran, Aarthi; Pappas, Claudia; Raman, Rahul; Srinivasan, Aravind; Shriver, Zachary; Tumpey, Terrence M.; Sasisekharan, Ram (Public Library of Science, 2010-10)
    The H2N2 subtype of influenza A virus was responsible for the Asian pandemic of 1957-58. However, unlike other subtypes that have caused pandemics such as H1N1 and H3N2, which continue to circulate among humans, H2N2 stopped ...
  • Kaur, Jasleen; Trancik, Jessika; Bettencourt, Luis M. A. (Public Library of Science, 2013-10)
    Understanding the factors driving innovation in energy technologies is of critical importance to mitigating climate change and addressing other energy-related global challenges. Low levels of innovation, measured in terms ...
  • González, M.; Carlin, A. M.; Dohrman, C. L.; Ringel, S. A.; Fitzgerald, Eugene A. (American Institute of Physics (AIP), 2011-03)
    The presence and properties of traps in p-type In[subscript 0.49]Ga[subscript 0.51]P grown on low dislocation density, metamorphic Ge/SiGe/Si substrates and GaAs substrates were determined using deep level transient ...
  • Liu, Xiang; Yu, Miao; Kim, Hyewon; Mameli, Marta; Stellacci, Francesco (Nature Publishing Group, 2012-11)
    It is accepted that the ligand shell morphology of nanoparticles coated with a monolayer of molecules can be partly responsible for important properties such as cell membrane penetration and wetting. When binary mixtures ...
  • Carney, Randy P.; Kim, Jin Young; Qian, Huifeng; Jin, Rongchao; Mehenni, Hakim; Stellacci, Francesco; Bakr, Osman M. (Nature Publishing Group, 2011-06)
    Nanoparticles are finding many research and industrial applications, yet their characterization remains a challenge. Their cores are often polydisperse and coated by a stabilizing shell that varies in size and composition. ...
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