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Browsing MIT Open Access Articles by Title

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  • Hsiao, Yu-Chung; Daniel, Luca (Association for Computing Machinery, 2011-06)
    Traditional parallel boundary element methods suffer from low parallel efficiency and poor scalability due to the long system solving time bottleneck. In this paper, we demonstrate how to avoid such a bottleneck by using ...
  • Du, Pingwu; Lippard, Stephen J. (American Chemical Society, 2010-12)
    We describe ZRL1, a turn-on colorimetric and red fluorescent zinc ion sensor. The Zn2+-promoted ring opening of the rhodamine spirolactam ring in ZRL1 evokes a 220-fold fluorescence turn-on response. In aqueous media, ZRL1 ...
  • Moses, Jeffrey; Huang, Shu-Wei; Hong, Kyung-Han; Mucke, O. D.; Falcao-Filho, E. L.; Benedick, Andrew J.; Ilday, F. O.; Dergachev, A.; Bolger, J. A.; Eggleton, B. J.; Kaertner, Franz X. (Optical Society of America, 2009-06)
    We present a 9 GW peak power, three-cycle, 2.2 μm optical parametric chirped-pulse amplification source with 1.5% rms energy and 150 mrad carrier envelope phase fluctuations. These characteristics, in addition to excellent ...
  • Ibrahem, Ismail; Yu, Miao; Hoveyda, Amir H.; Schrock, Richard Royce (American Chemical Society (ACS), 2009-02)
    The first highly Z- and enantioselective class of ring-opening/cross-metathesis reactions is presented. Transformations are promoted in the presence of <2 mol % of chiral stereogenic-at-Mo monoaryloxide complexes bearing ...
  • Jiang, Annie J.; Zhao, Yu; Hoveyda, Amir H.; Schrock, Richard Royce (American Chemical Society (ACS), 2009-10)
    Mo and W MonoAryloxide-Pyrrolide (MAP) olefin metathesis catalysts can couple terminal olefins to give as high as >98% Z-products in moderate to high yields with as little as 0.2% catalyst. Results are reported for 1-hexene, ...
  • Madhusudhan, Nikku; Seager, Sara (IOP Publishing, 2011-02)
    We present a detailed analysis of the dayside atmosphere of the hot-Neptune GJ 436b, based on recent Spitzer observations. We report statistical constraints on the thermal and chemical properties of the planetary atmosphere, ...
  • Yang, Li; Cheng, Cheng-Wei; Bulsara, Mayank T.; Fitzgerald, Eugene A. (American Institute of Physics (AIP), 2012-05)
    In this paper, we demonstrate high electron mobility In[subscript 0.53]Ga[subscript 0.47]As quantum-well metal oxide semiconductor field effect transistor(MOSFET)structures. The Al[subscript 2]O[subscript 3] (gate ...
  • Fudenberg, Geoff; Getz, Gad; Meyerson, Matthew L.; Mirny, Leonid A. (Nature Publishing Group, 2011-11)
    The accumulation of data on structural variation in cancer genomes provides an opportunity to better understand the mechanisms of genomic alterations and the forces of selection that act upon these alterations in cancer. ...
  • Hong, Kyung-Han; Lai, Chien-Jen; Gkortsas, Vasileios-Marios; Huang, Shu-Wei; Moses, Jeffrey; Granados, Eduardo; Bhardwaj, Siddharth; Kartner, Franz X. (American Physical Society, 2012-10)
    We experimentally and numerically study the atomic response and pulse propagation effects of high-order harmonics generated in Xe, Kr, and Ar driven by a 2.1-μm infrared femtosecond light source. The light source is an ...
  • Polydorides, Nick; Adhasi, Alireza; Miller, Eric L. (Society for Industrial and Applied Mathematics, 2012-08)
    We present a novel approach for the inverse problem in electrical impedance tomography based on regularized quadratic regression. Our contribution introduces a new formulation for the forward model in the form of a nonlinear ...
  • Berggren, Karl K.; Dauler, Eric A.; Kerman, Andrew J.; Molnar, Richard J.; Stevens, Martin J.; Baek, Burm; Hamilton, Scott A.; Mirin, Richard P.; Nam, Sae Woo (Optical Society of America, 2010-01)
    We demonstrate a new approach to measuring high-order temporal coherences that uses a four-element superconducting nanowire single-photon detector. The four independent, interleaved single-photon-sensitive elements parse ...
  • Bulsara, Mayank; Fitzgerald, Eugene A.; LaRoche, J. R.; Kazior, T. E.; Lubyshev, D.; Fastenau, J. M.; Liu, W. K.; Urteaga, M.; Ha, W.; Bergman, J.; Choe, M. J.; Smith, D.; Clark, D.; Thompson, R.; Drazek, C.; Daval, N.; Benaissa, L.; Augendre, E. (Institute of Electrical and Electronics Engineers, 2009-07)
    We present results on the direct monolithic integration of III-V devices and Si CMOS on a silicon substrate. InP HBTs (0.5 times 5 um2 emitter) with ft and fmax > 200 GHz were grown directly in windows adjacent to CMOS ...
  • Chow, Brian Yichiun; Han, Xue; Dobry, Allison S.; Qian, Xiaofeng; Chuong, Amy S.; Li, Mingjie; Henninger, Michael Alan; Belfort, Gabriel M.; Lin, Yingxi; Monahan, Patrick E.; Boyden, Edward Stuart (Nature Publishing Group, 2010-01)
    The ability to silence the activity of genetically specified neurons in a temporally precise fashion would provide the opportunity to investigate the causal role of specific cell classes in neural computations, behaviours ...
  • Lu, Bin; Saadat, Omair Irfan; Palacios, Tomas (Institute of Electrical and Electronics Engineers, 2010-06)
    In this letter, we present a new AlGaN/GaN enhancement-mode (E-mode) transistor based on a dual-gate structure. The dual gate allows the transistor to combine an E-mode behavior with low on-resistance and very high breakdown ...
  • Cheung, Kerry; Velasquez-Heller, Luis Fernand; Akinwande, Akintunde Ibitayo (Institute of Electrical and Electronics Engineers (IEEE), 2010-04)
    We report exciting experimental data from a low-cost, high-performance square electrode quadrupole mass filter with integrated ion optics intended for chips-cale mass spectrometry. The device showed a mass range of 650 amu ...
  • Kazior, T. E.; LaRoche, J. R.; Urteaga, M.; Bergman, J.; Choe, M. J.; Lee, K. J.; Seong, T.; Seo, M.; Yen, A.; Lubyshev, D.; Fastenau, J. M.; Liu, W. K.; Smith, D.; Clark, D.; Thompson, R.; Bulsara, Mayank; Fitzgerald, Eugene A.; Drazek, C.; Guiot, E. (Institute of Electrical and Electronics Engineers, 2010-10)
    We present recent results on the direct heterogeneous integration of InP HBTs and Si CMOS on a silicon template wafer or SOLES (Silicon On Lattice Engineered Substrate). InP HBTs whose performance are comparable to HBTs ...
  • Shor, Peter W.; Smith, Graeme; Smolin, John A.; Zeng, Bei (Institute of Electrical and Electronics Engineers (IEEE), 2011-10)
    We construct families of high performance quantum amplitude damping codes. All of our codes are nonadditive and most modestly outperform the best possible additive codes in terms of encoded dimension. One family is built ...
  • Cai, Yan; Bessette, Jonathan T.; Kimerling, Lionel C.; Michel, Jurgen; Camacho-Aguilera, Rodolfo Ernesto (American Institute of Physics (AIP), 2012-08)
    The in situ n-type doping of Ge thin films epitaxial grown on Si substrates is limited to 1 × 10[superscript 19] cm[superscript −3] by the phosphorous out-diffusion during growth at 600 °C. By studying the phosphorous ...
  • Wang, Tianyu Tom; Quatieri, Thomas F. (Institute of Electrical and Electronics Engineers, 2009-10)
    This paper considers the problem of obtaining an accurate spectral representation of speech formant structure when the voicing source exhibits a high fundamental frequency. Our work is inspired by auditory perception and ...
  • Munroe, Brian James; Cook, Alan M.; Shapiro, Michael; Temkin, Richard J.; Dolgashev, Valery A.; Laurent, Lisa L.; Lewandowski, James R.; Yeremian, A. Dian; Tantawi, Sami G.; Marsh, Roark A. (American Physical Society, 2013-01)
    An improved single-cell photonic band-gap (PBG) structure with an inner row of elliptical rods (PBG-E) was tested with high power at a 60 Hz repetition rate at X-band (11.424 GHz), achieving a gradient of 128  MV/m at a ...
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