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Browsing MIT Open Access Articles by Title

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  • Cai, Yan; Bessette, Jonathan T.; Kimerling, Lionel C.; Michel, Jurgen; Camacho-Aguilera, Rodolfo Ernesto (Optical Society of America, 2012-09)
    We demonstrate CVD in situ doping of Ge by utilizing phosphorus delta-doping for the creation of a high dopant diffusion source. Multiple monolayer delta doping creates source phosphorous concentrations above 1 × 10[superscript ...
  • Gai, Annie; Wittrup, Karl Dane; Pancer, Zeev; Mariuzza, Roy A.; Flajnik, Martin F.; Xu, Gang; Velikovsky, C. Alejandro; Tasumi, Satoshi (United States National Academy of Sciences, 2009-06)
    Lamprey are members of the ancestral vertebrate taxon (jawless fish), which evolved rearranging antigen receptors convergently with the jawed vertebrates. But instead of Ig superfamily domains, lamprey variable lymphocyte ...
  • Hayden, Joshua A.; Brophy, Megan Brunjes; Nolan, Elizabeth M.; Cunden, Lisa Stephanie (American Chemical Society (ACS), 2012-12)
    Calprotectin (CP) is a transition metal-chelating antimicrobial protein of the calcium-binding S100 family that is produced and released by neutrophils. It inhibits the growth of various pathogenic microorganisms by ...
  • Demory, Brice-Olivier; Seager, Sara (IOP Publishing, 2011-06)
    Hot Jupiters are expected to be dark from both observations (albedo upper limits) and theory (alkali metals and/or TiO and VO absorption). However, only a handful of hot Jupiters have been observed with high enough photometric ...
  • Gopinath, Juliet; Hong, Kyung-Han; Siddiqui, Aleem M.; Moses, Jeffrey; Lai, Chien-Jen; Hybl, John D.; Fan, Tso Yee (Institute of Electrical and Electronics Engineers, 2009-08)
    We report on a 300-W-level picosecond laser based on a cryogenically-cooled Yb:YAG amplifier seeded by a fiber CPA system. High-average-power picosecond second harmonic generation is also presented.
  • Foley, Maria Hottelet; Forcier, Talitha; McAndrew, Elizabeth; Gonzalez, Michael; Chen, Huabiao; Juelg, Boris; Walker, Bruce D.; Irvine, Darrell J. (Public Library of Science, 2014-02)
    The dissemination of HIV from an initial site of infection is facilitated by motile HIV-infected CD4+ T-cells. However, the impact of infected target cell migration on antigen recognition by HIV-specific CD8+ T-cells is ...
  • Lu, Bin; Palacios, Tomas (Institute of Electrical and Electronics Engineers (IEEE), 2010-07)
    In this letter, we present a new technology to increase the breakdown voltage of AlGaN/GaN high-electron-mobility transistors (HEMTs) grown on Si substrates. This new technology is based on the removal of the original Si ...
  • Razavipour, S. G.; Dupont, E.; Chan, Chun Wang Ivan; Xu, C.; Wasilewski, Z. R.; Laframboise, S. R.; Hu, Qing; Ban, D. (American Institute of Physics, 2014-01)
    A Terahertz quantum cascade laser with a rather high injection coupling strength based on an indirectly pumped scheme is designed and experimentally implemented. To effectively suppress leakage current, the chosen quantum ...
  • Narayan, Tarun Chandru; Miyakai, Tomoyo; Seki, Shu; Dinca, Mircea (American Chemical Society, 2012-08)
    The tetratopic ligand tetrathiafulvalene-tetrabenzoate (H[subscript 4]TTFTB) is used to synthesize Zn[subscript 2](TTFTB), a new metal–organic framework that contains columnar stacks of tetrathiafulvalene and benzoate-lined ...
  • Wu, Chaohong; Hong, Pengyu; Schulte, Joost; Sepp, Katharine J.; Littleton, J. Troy (Public Library of Science, 2011-08)
    To identify Huntington's Disease therapeutics, we conducted high-content small molecule and RNAi suppressor screens using a Drosophila primary neural culture Huntingtin model. Drosophila primary neurons offer a sensitive ...
  • Nieland, Thomas J.; Logan, David J.; Saulnier, Jessica; Lam, Daniel; Johnson, Caroline; Root, David E.; Carpenter, Anne E.; Sabatini, Bernardo L. (Public Library of Science, 2014-03)
    The formation of synapses, the specialized points of chemical communication between neurons, is a highly regulated developmental process fundamental to establishing normal brain circuitry. Perturbations of synapse formation ...
  • Gire, Stephen; Ellis, Crystal; Calderwood, Stephen; Qadri, Firdausi; Hensley, Lisa; Kellis, Manolis; Ryan, Edward T; LaRocque, Regina C; Harris, Jason B; Sabeti, Pardis C; Sealfon, Rachel Sima (BioMed Central Ltd, 2012-09)
    AbstractBackgroundWhole-genome sequencing is an important tool for understanding microbial evolution and identifying the emergence of functionally important variants over the course of epidemics. In October 2010, a severe ...
  • Willsky, Alan S.; Tan, Vincent Yan Fu; Anandkumar, Animashree (Association for Computing Machinery (ACM), 2012-03)
    We consider the problem of high-dimensional Gaussian graphical model selection. We identify a set of graphs for which an efficient estimation algorithm exists, and this algorithm is based on thresholding of empirical ...
  • Anandkumar, Anima; Tan, Vincent Y. F.; Willsky, Alan S. (Neural Information Processing Systems Foundation, 2011-12)
    We consider the problem of Ising and Gaussian graphical model selection given n i.i.d. samples from the model. We propose an efficient threshold-based algorithm for structure estimation based known as conditional mutual ...
  • Mower, Jacob; Zhang, Zheshen; Desjardins, Pierre; Lee, Catherine; Shapiro, Jeffrey H.; Englund, Dirk Robert (American Physical Society, 2013-06)
    We propose a high-dimensional quantum key distribution (QKD) protocol that employs temporal correlations of entangled photons. The security of the protocol relies on measurements by Alice and Bob in one of two conjugate ...
  • Belloni, Alexandre; Chernozhukov, Victor V. (Springer Science + Business Media B.V., 2011)
    In this chapter we discuss conceptually high dimensional sparse econometric models as well as estimation of these models using ℓ1-penalization and post- ℓ1-penalization methods. Focusing on linear and nonparametric ...
  • Zhang, Baile; Wu, Bae-Ian; Chen, Hongsheng (Institute of Electrical and Electronics Engineers (IEEE), 2009-07)
    In this article, we propose a spherical shell-core structure which is able to achieve arbitrarily large directivity. The structure is obtained from coordinate transformation. A small antenna can be projected to free space ...
  • Hsu, W. Chuck; Lu, Yen-Sheng; Chyan, Jung-Yi; Yeh, J. Andrew (Hindawi Publishing Corporation, 2012)
    Multicrystalline silicon (mc-Si) photovoltaic (PV) solar cells with nanoscale surface texturing by metal-nanoparticle-assisted etching are proposed to achieve high power efficiency. The investigation of average nanorod ...
  • Lin, Zin; Alcorn, Thomas; Loncar, Marko; Johnson, Steven G.; Rodriguez, Alejandro W. (American Physical Society, 2014-05)
    Using a combination of temporal coupled-mode theory and nonlinear finite-difference time-domain (FDTD) simulations, we study the nonlinear dynamics of all-resonant four-wave mixing processes and demonstrate the possibility ...
  • Inam, Wardah; Perreault, David J.; Afridi, Khurram (Institute of Electrical and Electronics Engineers (IEEE), 2013-03)
    This paper presents a new topology for a high efficiency dc/dc resonant power converter that utilizes a resistance compression network to provide simultaneous zero voltage switching and near zero current switching across ...
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