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Browsing MIT Open Access Articles by Title

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  • Park, Woon Ik; Kim, YongJoo; Jeong, Jae Won; Kim, Kyungho; Yoo, Jung-Keun; Hur, Yoon Hyung; Kim, Jong Min; Thomas, Edwin L.; Alexander-Katz, Alfredo; Jung, Yeon Sik (Nature Publishing Group, 2013-11)
    Ultrafine, uniform nanostructures with excellent functionalities can be formed by self-assembly of block copolymer (BCP) thin films. However, extension of their geometric variability is not straightforward due to their ...
  • David, Lawrence A; Materna, Arne C; Friedman, Jonathan; Blackburn, Matthew C; Baptista, Maria Ines; Perrotta, Allison Rose; Erdman, Susan E.; Alm, Eric J. (Biomed Central Ltd., 2014-07)
    Background: Disturbance to human microbiota may underlie several pathologies. Yet, we lack a comprehensive understanding of how lifestyle affects the dynamics of human-associated microbial communities. Results: Here, ...
  • David, Lawrence A; Materna, Arne C; Friedman, Jonathan; Blackburn, Matthew C; Baptista, Maria Ines; Perrotta, Allison Rose; Erdman, Susan E.; Alm, Eric J. (BioMed Central Ltd, 2014-07)
    Background: Disturbance to human microbiota may underlie several pathologies. Yet, we lack a comprehensive understanding of how lifestyle affects the dynamics of human-associated microbial communities. Results: Here, ...
  • Penterman, Jon; Abo, Ryan P.; De Nisco, Nicole J.; Arnold, Markus F. F.; Walker, Graham C.; Longhi, Renato; Zanda, Matteo (National Academy of Sciences (U.S.), 2014-02)
    The α-proteobacterium Sinorhizobium meliloti establishes a chronic intracellular infection during the symbiosis with its legume hosts. Within specialized host cells, S. meliloti differentiates into highly polyploid, enlarged ...
  • Gabor, Nathaniel M.; Song, Justin Chien Wen; Ma, Qiong; Nair, Nityan L.; Taychatanapat, Thiti; Levitov, Leonid; Jarillo-Herrero, Pablo; Watanabe, Kenji; Taniguchi, Takashi (American Association for the Advancement of Science (AAAS), 2011-10)
    We report on the intrinsic optoelectronic response of high-quality dual-gated monolayer and bilayer graphene p-n junction devices. Local laser excitation (of wavelength 850 nanometers) at the p-n interface leads to striking ...
  • Song, Justin Chien Wen; Rudner, Mark S.; Marcus, Charles M.; Levitov, Leonid (American Chemical Society, 2011-09)
    Strong electron–electron interactions in graphene are expected to result in multiple-excitation generation by the absorption of a single photon. We show that the impact of carrier multiplication on photocurrent response ...
  • Kloosterman, J. L.; Hayton, D. J.; Ren, Y.; Hovenier, J. N.; Gao, J. R.; Klapwijk, T. M.; Walker, C. K.; Reno, J. L.; Kao, Tsung-Yu; Hu, Qing (American Institute of Physics (AIP), 2013-01)
    We report on a heterodyne receiver designed to observe the astrophysically important neutral atomic oxygen [OI] line at 4.7448 THz. The local oscillator is a third-order distributed feedback quantum cascade laser operating ...
  • Jeon, Jessie S.; Chung, Seok; Kamm, Roger Dale; Charest, Joseph L. (Springer Netherlands, 2010-11)
    Clinically relevant studies of cell function in vitro require a physiologically-representative microenvironment possessing aspects such as a 3D extracellular matrix (ECM) and controlled biochemical and biophysical parameters. ...
  • Demory, Brice-Olivier; Seager, Sara; Winn, Joshua Nathan (Institute of Physics Publishing, 2011-11)
    This paper reports the discovery and characterization of the transiting hot giant exoplanet Kepler-17b. The planet has an orbital period of 1.486 days, and radial velocity measurements from the Hobby-Eberly Telescope show ...
  • Trenkle, Jonathan C.; Packard, Corinne E.; Schuh, Christopher A. (American Institute of Physics, 2010-07)
    An instrument capable of performing nanoindentation at temperatures up to 500 °C in inert atmospheres, including partial vacuum and gas near atmospheric pressures, is described. Technical issues associated with the technique ...
  • Trelewicz, Jason R.; Schuh, Christopher A. (Elsevier, 2009-08)
    High-temperature nanoindentation experiments are conducted to assess the activation enthalpy for deformation of nanocrystalline Ni–W alloys, for grain sizes between 3 and 80 nm. Thermal softening becomes less pronounced ...
  • Yokoyama, Kenichi; Uhlin, Ulla; Stubbe, JoAnne (American Chemical Society (ACS), 2010-10)
    Escherichia coli ribonucleotide reductase is an α2β2 complex that catalyzes the conversion of nucleotides to deoxynucleotides and requires a diferric-tyrosyl radical (Y[superscript •]) cofactor to initiate catalysis. The ...
  • Winn, Joshua Nathan; Fabrycky, Daniel; Albrecht, Simon H.; Johnson, John Asher (American Physical Society, 2010-07)
    We show that stars with transiting planets for which the stellar obliquity is large are preferentially hot (T [subscript eff] > 6250 K). This could explain why small obliquities were observed in the earliest measurements, ...
  • Torrejón, J. M.; Testa, P.; Rodes, J. J.; Nowak, Michael A.; Schulz, Norbert S. (IOP Publishing, 2013-02)
    We present an analysis of a series of four consecutive Chandra high-resolution transmission gratings observations, amounting to a total of 150 ks, of the Be X-ray source HD 119682 (=1WGA J1346.5–6255), a member of the new ...
  • van Dijk, Marten; Juels, Ari; Oprea, Alina; Rivest, Ronald L.; Stefanov, Emil; Triandopoulos, Nikos (Association for Computing Machinery (ACM), 2012-10)
    We consider the following challenge: How can a cloud storage provider prove to a tenant that it's encrypting files at rest, when the provider itself holds the corresponding encryption keys? Such proofs demonstrate sound ...
  • Coulson, N. Edward; Fisher, Lynn (Elsevier, 2008-12)
    We develop two search-theoretic models emphasizing firm entry to examine the Oswald hypothesis, the idea that homeownership is linked to inferior labor market outcomes, and compare their predictions to three extant theories. ...
  • Dreyfuss, Jonathan M.; Levner, Daniel; Galagan, James E.; Church, George M.; Ramoni, Marco F. (BioMed Central Ltd., 2012-07)
    Background Pre-symptomatic prediction of disease and drug response based on genetic testing is a critical component of personalized medicine. Previous work has demonstrated that the predictive capacity of genetic testing ...
  • Bors, Eleanor Kathleen; Solomon, Susan (National Academy of Sciences (U.S.), 2013-05)
    Stratospheric ozone loss is on course to become a solved environmental problem, with all significant producing countries (including China and India) undertaking complete phase-outs of ozone-depleting substances. The universal ...
  • Antipov, Eugene; Cho, Art E.; Klibanov, Alexander M. (American Chemical Society, 2009-08)
    The effect of all possible mutations at position 178 on the enantioselectivity of yeast surface-bound horseradish peroxidase (HRP) toward chiral phenols has been investigated. In contrast to their wild-type predecessor, ...
  • Poliannikov, Oleg V.; Malcolm, Alison E.; Djikpesse, Hugues; Prange, Michael (Society of Exploration Geophysicists, 2011)
    Hydraulic fracturing is an important tool that helps extract fluids from the subsurface. It is critical in applications ranging from enhanced oil recovery to geothermal energy pro-duction. As the goal of fracturing is to ...
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