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Browsing MIT Open Access Articles by Title

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  • Raymond, Scott Bruce; Boas, David A.; Kumar, Anand T. N.; Bacskai, Brian J. (SPIE, 2010-08)
    Near-infrared (NIR) fluorescence tomography of multiple fluorophores has previously been limited by the bandwidth of the NIR spectral regime and the broad emission spectra of most NIR fluorophores. We describe in vivo ...
  • Demirtas, Sefa; del Alamo, Jesus A.; Gajewski, Donald A.; Hanson, Allen (CS ManTech, 2009-05)
    We have studied the reliability of intrinsic SiN MIM capacitors designed for 48 V and 125 [superscript 0]C operation and manufactured in a GaN process flow. It is shown that very small area capacitors (10um x 10um) with a ...
  • Szulczewski, Michael Lawrence; MacMinn, Christopher W.; Herzog, Howard J.; Juanes, Ruben (National Academy of Sciences (U.S.), 2012-04)
    In carbon capture and storage (CCS), CO[subscript 2] is captured at power plants and then injected underground into reservoirs like deep saline aquifers for long-term storage. While CCS may be critical for the continued ...
  • Le, Jia-Liang; Bazant, Zdenek P.; Bazant, Martin Z. (American Institute of Physics, 2009-11)
    The two-parameter Weibull distribution has been widely adopted to model the lifetime statistics of dielectric breakdown under constant voltage, but recent lifetime testing for high-k gate dielectrics has revealed a systematic ...
  • Maznev, Alexei; Hofmann, Felix; Jandl, Adam Christopher; Esfarjani, Keivan; Bulsara, Mayank; Fitzgerald, Eugene A.; Chen, Gang; Nelson, Keith Adam (American Institute of Physics (AIP), 2013-01)
    We measure the lifetime of the zone-center 340 GHz longitudinal phonon mode in a GaAs-AlAs superlattice excited and probed with femtosecond laser pulses. By comparing measurements conducted at room temperature and liquid ...
  • Cuffe, John; Ristow, O.; Chavez, E.; Shchepetov, A.; Chapuis, P. O.; Alzina, F.; Hettich, M.; Prunnila, M.; Ahopelto, J.; Dekorsy, T.; Torres, C. M. Sotomayor (American Physical Society, 2013-02)
    We study the relaxation of coherent acoustic phonon modes with frequencies up to 500 GHz in ultrathin free-standing silicon membranes. Using an ultrafast pump-probe technique of asynchronous optical sampling, we observe ...
  • Koehrer, Caroline; Mandal, Debabrata; Rajbhandary, Uttam L.; Gaston, Kirk W.; Grosjean, Henri; Limbach, Patrick A. (Oxford University Press, 2013-11)
    Translation of the isoleucine codon AUA in most prokaryotes requires a modified C (lysidine or agmatidine) at the wobble position of tRNA[Ile over 2] to base pair specifically with the A of the AUA codon but not with the ...
  • Taylor, Joshua A.; Hover, Franz S. (Society for Modeling & Simulation International, 2011)
    We apply relaxation procedures to polynomial optimization problems that originate in transmission system planning, and obtain new convex formulations for the AC case. The approach is novel because the optimization is ...
  • Haimes, Michael M.; Kaelbling, Leslie P.; Kersting, Kristian; Milch, Brian; Zettlemoyer, Luke S. (AAAI Press, 2008-01)
    Lifted inference algorithms exploit repeated structure in probabilistic models to answer queries efficiently. Previous work such as de Salvo Braz et al.'s first-order variable elimination (FOVE) has focused on the sharing ...
  • Milch, Brian; Zettlemoyer, Luke S.; Kersting, Kristian; Haimes, Michael; Kaelbling, Leslie P. (Association for Computing Machinery (ACM), 2008)
    Lifted inference algorithms exploit repeated structure in probabilistic models to answer queries efficiently. Previous work such as de Salvo Braz et al.'s first-order variable elimination (FOVE) has focused on the sharing ...
  • Parrilo, Pablo A.; Thomas, Rekha R.; Gouveia, Joao (Institute for Operations Research and the Management Sciences (INFORMS), 2013-05)
    In this paper, we address the basic geometric question of when a given convex set is the image under a linear map of an affine slice of a given closed convex cone. Such a representation or lift of the convex set is especially ...
  • Silvia, Jared Scott; Cummins, Christopher C. (American Chemical Society, 2010-02)
    The terminal nitride anion complex [Na][N≡Nb(N[tBu]Ar)3] ([Na][1], Ar = 3,5-Me2C6H3) reacts quantitatively with CO2 to give the carbamate complex [Na][O2CN≡Nb(N[tBu]Ar)3] ([Na][O2C-1]). The structure of [Na][O2C-1] as the ...
  • Okumura, Leah M.; Lesch, Bluma; Page, David C. (Public Library of Science, 2013-06)
    In mice, successful development and reproduction require that all cells, including germ cells, transition from a pluripotent to a differentiated state. This transition is associated with silencing of the pluripotency genes ...
  • Poon, Zhiyong; Chen, Shujun; Engler, Amanda C.; Lee, Hyung-il; Atas, Evrim; von Maltzahn, Geoffrey; Bhatia, Sangeeta N.; Hammond, Paula T. (Wiley Blackwell, 2010-08)
    A matter of presentation: The manner in which polyvalent ligands are presented to a cell—homogeneously or in spatially defined groupings on a nanoparticle surface—may play an important role in cellular uptake. This aspect ...
  • Zhu, Ye; Buchwald, Stephen Leffler (American Chemical Society (ACS), 2014-03)
    A palladium-catalyzed asymmetric arylation of 9-aminofluorene-derived imines using a chiral dialkylbiaryl phosphine as the supporting ligand has been developed. This transformation allows for enantioselective access to a ...
  • Yang, Yang; Buchwald, Stephen Leffler (American Chemical Society (ACS), 2013-07)
    An orthogonal set of catalyst systems has been developed for the Suzuki–Miyaura coupling of 3,3-disubstituted and 3-monosubstituted allylboronates with (hetero)aryl halides. These methods allow for the highly selective ...
  • Mahony, Shaun; Mazzoni, Esteban O.; McCuine, Scott; Young, Richard A.; Wichterle, Hynek; Gifford, David K. (BioMed Central Ltd., 2011-01)
    Abstract Background Among its many roles in development, retinoic acid determines the anterior-posterior identity of differentiating motor neurons by activating retinoic acid receptor (RAR)-mediated transcription. RAR ...
  • Mahony, Shaun; McCuine, Scott; Wichterle, Hynek; Gifford, David K.; Mazzoni, Esteban O.; Young, Richard A. (BioMed Central Ltd, 2011-01)
    Background: Among its many roles in development, retinoic acid determines the anterior-posterior identity of differentiating motor neurons by activating retinoic acid receptor (RAR)-mediated transcription. RAR is thought ...
  • Ringstad, Niels; Abe, Namiko; Horvitz, H. Robert (American Association for the Advancement of Science (AAAS), 2009-07)
    Biogenic amines such as serotonin and dopamine are intercellular signaling molecules that function widely as neurotransmitters and neuromodulators. We have identified in the nematode Caenorhabditis elegans three ligand-gated ...
  • Herbst, William; LeDuc, Katherine; Hamilton, Catrina M.; Winn, Joshua Nathan; Ibrahimov, Mansur; Mundt, Reinhard; Johns-Krull, Christopher M. (IOP Publishing, 2010-11)
    Photometry of the unique pre-main-sequence binary system KH 15D is presented, spanning the years 2005-2010. This system has exhibited photometric variations and eclipses over the last ~50 years that are attributed to the ...
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